771 results on '"Hohmann, S"'
Search Results
202. Notizen: Reaktivität der Hydrierungs-Katalysatoren MeH(CO)[P(C6H5)3]3 (Me = Rh, Ir) gegenüber ungesättigten Verbindungen
- Author
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Strohmeier, W., primary and Hohmann, S., additional
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- 1970
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203. Towards an artificial neural network framework
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Schurmann, F., primary, Hohmann, S., additional, Schemmel, J., additional, and Meier, K., additional
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204. An integrated mixed-mode neural network architecture for megasynapse ANNs
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Schemmel, J., primary, Shurmann, F., additional, Hohmann, S., additional, and Meier, K., additional
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205. Obstruction of the celiac axis resulting in a pancreaticoduodenal artery aneurysm.
- Author
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Golarz SR and Hohmann S
- Abstract
A 47-year-old woman complained of abdominal pain, and a computed tomography scan indicated compressive obstruction of the celiac axis and a 4-cm retropancreatic aneurysm. An angiogram identified the aneurysmal vessel as the posterior pancreaticoduodenal artery. All foregut structures were supplied by this aneurysmal vessel. Via an open approach, the inflow and outflow of the aneurysm were ligated, and blood flow to the celiac axis was reconstructed via a bypass from the supraceliac aorta. A follow-up scan indicated complete thrombosis of the aneurysm. The patient is now symptom free. Open reconstruction of the celiac axis is mandatory when ligation of a pancreaticoduodenal aneurysm results in foregut ischemia. Ligation and reconstruction can be done safely and effectively in the elective setting. [ABSTRACT FROM AUTHOR]
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- 2009
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206. Notizen: Reaktivität der Hydrierungs-Katalysatoren MeH(CO)[P(C6H5)3]3(Me = Rh, Ir) gegenüber ungesättigten Verbindungen
- Author
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Strohmeier, W. and Hohmann, S.
- Published
- 1970
- Full Text
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207. The cell division cycle gene CDC60 encodes cytosolic leucyl-tRNA synthetase in Saccharomyces cerevisiae
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Hohmann, S. and Thevelein, J. M.
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- 1992
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208. Automated Model Generation and Observer Design for Interconnected Systems : A Port-Hamiltonian Approach
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Pfeifer, Martin and Hohmann, S.
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State-space models ,Mathematical Modeling ,Port-Hamiltonian Systems ,Port-Hamiltonsche Systeme ,Beobachterentwurf ,Automation ,Automatisierung ,Observer Design ,Model generation ,Observer design ,Nonlinear systems ,Mathematische Modellbildung ,Bond graphs ,Port-Hamiltonian systems ,Automated modeling ,ddc:620 ,State estimation ,Engineering & allied operations - Abstract
Vernetzte Systeme stellen einen unverzichtbaren Teil moderner Gesellschaften dar. Mit dem Ausrollen neuer Kommunikationstechnologien und in Folge der fortgeschrittenen Nutzung von Synergiepotenzialen entstanden in den letzten Jahren vernetzte Systeme ungeahnten Ausmaßes. Aufgrund der Komplexität dieser Systeme, gelangen bestehende Modellierungs- und Beobachterentwurfsmethoden an ihre Grenzen. Modelle und Beobachter können deshalb häufig nur unter erheblichen Vereinfachungen entwickelt werden. Die vorliegende Dissertation schafft Abhilfe. Leitgedanke ist es, die Vorgänge der Modellerzeugung und des Beobachterentwurfs zu automatisieren. Hierzu werden in dieser Arbeit automatisierbare Modellierungs- und Beobachtermethoden auf Basis der Port-Hamiltonschen Systemtheorie entwickelt. Diese Methoden sind in einem Software-Prototyp namens AMOTO implementiert. In zwei Fallstudien wird AMOTO jeweils zur automatisierten Modellherleitung und zum automatisierten Beobachterentwurf eingesetzt. Computersimulationen weisen in beiden Fallstudien die Funktionstüchtigkeit der erzeugten Modelle und Beobachter nach und zeigen, dass diese genauere Ergebnisse liefern, als Modelle und Beobachter, die mit Methoden des bisherigen Stands der Technik entwickelt wurden. Dies unterstreicht die praktische Nutzbarkeit des vorgestellten Ansatzes. Es zeigt sich ferner, dass der Ansatz auf eine große Klasse vernetzter Systeme anwendbar ist. Somit leisten die Methoden, Algorithmen und Werkzeuge aus dieser Arbeit einen wichtigen Beitrag zur Bewältigung zukünftiger Herausforderungen in vernetzen Systemen.
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- 2022
209. Absicherung hochautomatisierten Fahrens durch passiven virtuellen Dauerlauftest
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König, Alexander Georg and Hohmann, S.
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passiver Dauerlauftest ,statistische Absicherung ,Statistical verification ,highly automated driving ,Sicherheit ,Hochautomatisiertes Fahren ,Validierung ,Statistische Validierung ,Verifikation ,Validation ,ddc:620 ,Safety ,Engineering & allied operations ,Simulation - Abstract
Die Entwicklung des hochautomatisierten Fahrens (HAF) schreitet in hoher Geschwindigkeit voran. Verschiedene Fahrzeughersteller haben erste Derivate mit automatisierten Fahrfunktionen, die keine Überwachung durch den Fahrer mehr erfordern, für die kommenden Jahre angekündigt. Es fehlt allerdings noch der Sicherheitsnachweis, dass HAF eine insgesamt positive Risikobilanz gemäß den Anforderungen der vom deutschen Verkehrsministerium eingesetzten Ethik-Kommission hat und somit durch die Einführung dieser Funktion die allgemeine Gefahr von Personenschäden im Straßenverkehr nicht zunimmt. Die aktuell verfügbaren Ansätze zur Erbringung eines Sicherheitsnachweises für Assistenzsysteme sind für HAF ungeeignet. Die wenigen theoretisch möglichen Methoden wie ein Nachweis durch Dauerlauftest sind mit unrealistisch hohem Kosten- und Zeitaufwand verbunden und somit nicht industriell einsetzbar. In dieser Arbeit wird daher eine neue Absicherungsmethode erarbeitet, die einen Beitrag zum Schließen dieser Lücke leistet. Bei heutigen Entwicklungen von Fahrerassistenzfunktionen kommen nicht-statistische Absicherungsmethoden zum Einsatz. Die Komplexität der Absicherungsaufgabe wird bei diesen dadurch deutlich reduziert, dass ein wesentlicher Teil des Sicherheitskonzepts auf der permanenten Überwachung der Funktion durch den menschlichen Fahrer beruht, der in kritischen Situationen eingreifen muss. Eine Absicherung ist daher nur noch hinsichtlich der Beherrschbarkeit durch den Fahrer notwendig. Die Fahrerüberwachung kann beim HAF nicht vorausgesetzt werden, sodass die HAF-Funktion selbst alle auftretenden Situationen bis zu einer Fahrerübernahme beherrschen muss. Zusammen mit der großen Situationsvielfalt und dem Einsatz maschinell trainierter Algorithmen erhöht dies die Komplexität der Absicherungsaufgabe in einem Maße, dass die bisher genutzten Absicherungsverfahren an ihre Grenzen stoßen. Dies motiviert den Ansatz "`passives HAF"' zur statistischen Absicherung des hochautomatisierten Fahrens. Grundidee dieses Ansatzes ist es, einen Teil der jedes Jahr von menschlichen Fahrern gefahrenen Kilometer zur Absicherung zu nutzen, indem ein Teil der Fahrzeuge zusätzlich mit den für HAF erforderlichen Sensoren und Steuergeräten ausgestattet wird. Diese entsprechen dem für den späteren Kundeneinsatz vorgesehen Umfang der HAF-Funktion bis zu der Stelle, an dem Steuer- und Regeleingriffe in die Aktorik des Fahrzeugs erfolgen. Statt der Umsetzung der vorgegebenen Stellgrößen durch die Fahrzeugaktorik wird der Ausgang der HAF-Funktion mit den vom menschlichen Fahrer tatsächlich durchgeführten Fahrhandlungen verglichen. Die Funktion läuft somit nur "`passiv"' im Hintergrund mit, sodass aus fehlerhaften Aktorvorgaben kein Sicherheitsrisiko resultierten kann. Hierdurch entsteht ein offener Regelkreis, sodass der weitere Verlauf des Szenarios bei Eingriff der HAF-Funktion zunächst unbekannt ist. Der Regelkreis wird geschlossen, indem immer dann anhand der durch die Sensorik aufgenommenen Daten ein Simulationsszenario generiert wird, wenn die Fahrhandlungen vom HAF und menschlichem Fahrer voneinander abweichen. Anhand der Simulation kann überprüft werden, ob die geplante Handlung des HAF zu einer kritischen Situation geführt hätte. Zur Erhöhung der Validität der Simulation werden individualisierte Fahrermodelle verwendet, deren Entwicklung und Zuordnung Teil der entwickelten Methode ist. Ziel des Ansatzes ist die Nutzung der im realen Straßenverkehr vorkommenden Szenarien als Ausgangspunkt für die Absicherung des HAF mittels Simulation und anschließender Kritikalitätsanalyse. So kann fehlerhaftes Fahrverhalten erkannt und für eine Verbesserung der Funktion verwendet werden. Die Ergebnisse der Arbeit zeigen, dass mit Hilfe dieser Methode fehlerhafte Fahrentscheidungen des HAF gefunden werden können, welche bei aktivem Funktionsausgang zu kritischen Situationen geführt hätten. Vorteile der Methode sind, dass eine gefahrlose und vergleichsweise kostengünstige und zeiteffiziente Absicherung möglich ist, die aufgrund der Nutzung realer Verkehrsszenarien eine hohe Validität aufweist.
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- 2022
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210. Adaptive Dynamic Programming: Solltrajektorienfolgeregelung und Konvergenzbedingungen
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Köpf, Florian and Hohmann, S.
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Optimale Regelung ,adaptive Optimalregelung ,lernende Regler ,KI ,Reinforcement Learning (RL) ,Optimal Control ,Systemanregung ,Adaptive Optimal Control ,Adaptive Dynamic Programming (ADP) ,Adaptive Regelung ,Adaptive Control ,Selbstlernende Regler ,Learning-Based Control ,AI ,Persistent Excitation (PE) ,ddc:620 ,Engineering & allied operations - Abstract
Adaptive Dynamic Programming (ADP) steht als vielversprechendes und zukunftsorientiertes regelungstechnisches Werkzeug im Fokus der aktuellen Forschung. Allerdings existieren hierf��r bislang weder flexibel einsetzbare, mit dem ADP-Mechanismus kompatible Solltrajektoriendarstellungen noch theoretische Untersuchungen hinsichtlich einer geeigneten Systemanregung zur Sicherstellung der Konvergenz. Die vorliegende Arbeit schlie��t diese L��cken: Zum einen werden erstmals zeitdiskrete und zeitkontinuierliche Methoden pr��sentiert und analysiert, die flexible Solltrajektoriendarstellungen in ADP-Ans��tze integrieren. Die explizite Abh��ngigkeit der vorgestellten, neuartigen Value- bzw. Q-Function und des darauf basierenden gelernten Regelgesetzes von Trajektorienparametern, die den aktuellen Sollverlauf repr��sentieren, erm��glicht eine variable Vorgabe der Solltrajektorie zur Laufzeit. Zum anderen werden erstmalig theoretische Bedingungen an den Systemzustand hergeleitet, die sicherstellen, dass eine f��r die Konvergenz der Adaption zentrale Anregungseigenschaft erf��llt ist. Verbleibende Freiheitsgrade erlauben zudem die Ber��cksichtigung anwendungsspezifischer Anforderungen bei der Systemanregung. Die theoretischen Aussagen werden in Simulationen best��tigt. Erste reale Anwendungen der vorgestellten adaptiven optimalen Trajektorienfolgeregelungsmethoden offenbaren schlie��lich das Potenzial dieser Ans��tze. Flexible und effiziente Regler, die aufgrund der Ber��cksichtigung des Solltrajektorienverlaufs vorausschauend agieren, k��nnen ohne aufwendige Modellbildung aus realen Messdaten erlernt werden und sind zudem bisherigen Ans��tzen bez��glich ihrer Performanz ��berlegen.
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- 2022
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211. Guaranteed Verification of Dynamic Systems
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Schwab, Stefan and Hohmann, S.
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Interval Arithmetic ,Diagnose ,Bounded Error ,Dynamic Systems ,Verifikation ,Dynamische Systeme ,Diagnosis ,Verification ,Intervall Arithmetik ,ddc:620 ,Engineering & allied operations - Abstract
Diese Arbeit beschreibt einen neuen Spezifikations- und Verifikationsansatz für dynamische Systeme. Der neue Ansatz ermöglicht dabei Ergebnisse, die per Definition frei von Fehlern 2. Art sind. Dies bedeutet, dass das Ergebnis der Verifikation keine versteckten Fehler enthalten kann. Somit können zuverlässige Ergebnisse für die Analyse von sicherheitskritischen Systemen generiert werden. Dazu wird ein neues Verständnis von mengenbasierter Konsistenz dynamischer Systeme mit einer gegebenen Spezifikation eingeführt. Dieses basiert auf der Verwendung von Kaucher Intervall Arithmetik zur Einschließung von Messdaten. Konsistenz wird anhand der vereinigten Lösungsmenge der Kaucher Arithmetik definiert. Dies führt zu mathematisch garantierten Ergebnissen. Die resultierende Methode kann das spezifizierte Verhalten eines dynamischen System auch im Falle von Rauschen und Sensorungenauigkeiten anhand von Messdaten verifizieren. Die mathematische Beweisbarkeit der Konsistenz wird für eine große Klasse von Systemen gezeigt. Diese beinhalten zeitinvariante, intervallartige und hybride Systeme, wobei letztere auch zur Beschreibung von Nichtlinearitäten verwendet werden können. Darüber hinaus werden zahlreiche Erweiterungen dargestellt. Diese führen bis hin zu einem neuartigen iterativen Identifikations- und Segmentierungsverfahren für hybride Systeme. Dieses ermöglicht die Verfikation hybrider Systeme auch ohne Wissen über Schaltzeitpunkte. Die entwickelten Verfahren können darüber hinaus zur Diagnose von dynamischen Systemen verwendet werden, falls eine ausreichend schnelle Berechnung der Ergebnisse möglich ist. Die Verfahren werden erfolgreich auf eine beispielhafte Variation verschiedener Tanksysteme angewendet. Die neuen Theorien, Methoden und Algortihmen dieser Arbeit bilden die Grundlage für eine zuverlässige Analyse von hochautomatisierten sicherheitskritischen Systemen.
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- 2022
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212. Parameter- und Ordnungsidentifikation von fraktionalen Systemen mit einer Anwendung auf eine Lithium-Ionen-Batteriezelle
- Author
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Stark, Oliver, Hohmann, S., and Hohmann, Sören
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Parameter identification ,Lithium-ion battery cell ,Fractional calculus ,Fraktionale Analysis ,Lithium-Ionen-Batteriezelle ,ddc:620 ,Parameteridentifikation ,Engineering & allied operations - Abstract
Für einen sicheren und effizienten Betrieb von Batteriezellen werden zunehmend modellbasierte Methoden eingesetzt. Zur Modellierung der Batteriezellen haben sich fraktionale Modelle, die durch nicht-ganzzahlige Ableitungsordnungen gekennzeichnet sind, aufgrund der elektrochemischen Interpretierbarkeit etabliert. In der Arbeit werden Verfahren zur Parameter- und Ableitungsordnungsidentifikation fraktionaler Systeme ohne Einschränkung bezüglich der Anregung zu Identifikationsbeginn hergeleitet.
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- 2021
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213. Virtual Histology of Cortical Thickness and Shared Neurobiology in 6 Psychiatric Disorders
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Committee, Writing, Disorder, Autism Spectrum, French, Leon, Grevet, Eugenio H, Groenewold, Nynke A, Grotegerd, Dominik, Gruber, Oliver, Gruner, Patricia, Guerrero-Pedraza, Amalia, Gur, Raquel E, Gur, Ruben C, Haar, Shlomi, Haarman, Bartholomeus C M, Thomopoulos, Sophia I, Haavik, Jan, Hahn, Tim, Hajek, Tomas, Harrison, Benjamin J, Harrison, Neil A, Hartman, Catharina A, Whalley, Heather C, Heslenfeld, Dirk J, Hibar, Derrek P, Hilland, Eva, Pozzi, Elena, Hirano, Yoshiyuki, Ho, Tiffany C, Hoekstra, Pieter J, Hoekstra, Liesbeth, Hohmann, Sarah, Hong, L. E., Höschl, Cyril, Høvik, Marie F, Howells, Fleur M, Nenadic, Igor, Abe, Yoshinari, Jalbrzikowski, Maria, James, Anthony C, Janssen, Joost, Jaspers-Fayer, Fern, Xu, Jian, Jonassen, Rune, Karkashadze, Georgii, King, Joseph A, Kircher, Tilo, Kirschner, Matthias, Abé, Christoph, Koch, Kathrin, Kochunov, Peter, Kohls, Gregor, Konrad, Kerstin, Krämer, Bernd, Krug, Axel, Kuntsi, Jonna, Kwon, Jun Soo, Landén, Mikael, Landrø, Nils I, Anticevic, Alan, Lazaro, Luisa, Lebedeva, Irina S, Leehr, Elisabeth J, Lera-Miguel, Sara, Lesch, Klaus-Peter, Lochner, Christine, Louza, Mario R, Luna, Beatriz, Lundervold, Astri J, MacMaster, Frank P, Alda, Martin, Maglanoc, Luigi A, Malpas, Charles B, Portella, Maria J, Marsh, Rachel, Martyn, Fiona M, Mataix-Cols, David, Mathalon, Daniel H, McCarthy, Hazel, McDonald, Colm, McPhilemy, Genevieve, Aleman, Andre, Meinert, Susanne, Menchón, José M, Minuzzi, Luciano, Mitchell, Philip B, Moreno, Carmen, Morgado, Pedro, Muratori, Filippo, Murphy, Clodagh M, Murphy, Declan, Mwangi, Benson, Alloza, Clara, Nabulsi, Leila, Nakagawa, Akiko, Nakamae, Takashi, Namazova, Leyla, Narayanaswamy, Janardhanan, Jahanshad, Neda, Nguyen, Danai D, Nicolau, Rosa, O'Gorman Tuura, Ruth L, O'Hearn, Kirsten, Alonso-Lana, Silvia, Oosterlaan, Jaap, Opel, Nils, Ophoff, Roel A, Oranje, Bob, García de la Foz, Victor Ortiz, Overs, Bronwyn J, Paloyelis, Yannis, Pantelis, Christos, Parellada, Mara, Pauli, Paul, Disorder, Bipolar, Ameis, Stephanie H, Picó-Pérez, Maria, Picon, Felipe A, Piras, Fabrizio, Piras, Federica, Plessen, Kerstin J, Pomarol-Clotet, Edith, Preda, Adrian, Puig, Olga, Quidé, Yann, Radua, Joaquim, Anagnostou, Evdokia, Ramos-Quiroga, J Antoni, Rasser, Paul E, Rauer, Lisa, Reddy, Janardhan, Redlich, Ronny, Reif, Andreas, Reneman, Liesbeth, Repple, Jonathan, Retico, Alessandra, Richarte, Vanesa, McIntosh, Andrew A, Richter, Anja, Rosa, Pedro G P, Rubia, Katya K, Hashimoto, Ryota, Sacchet, Matthew D, Salvador, Raymond, Santonja, Javier, Sarink, Kelvin, Sarró, Salvador, Satterthwaite, Theodore D, Arango, Celso, Sawa, Akira, Schall, Ulrich, Schofield, Peter R, Schrantee, Anouk, Seitz, Jochen, Serpa, Mauricio H, Setién-Suero, Esther, Shaw, Philip, Shook, Devon, Silk, Tim J, Arnold, Paul D, Sim, Kang, Simon, Schmitt, Simpson, Helen Blair, Singh, Aditya, Skoch, Antonin, Skokauskas, Norbert, Soares, Jair C, Soreni, Noam, Soriano-Mas, Carles, Spalletta, Gianfranco, Asherson, Philip, Spaniel, Filip, Lawrie, Stephen M, Stern, Emily R, Stewart, S Evelyn, Takayanagi, Yoichiro, Temmingh, Henk S, Tolin, David F, Tomecek, David, Tordesillas-Gutiérrez, Diana, Tosetti, Michela, Assogna, Francesca, Uhlmann, Anne, van Amelsvoort, Therese, van der Wee, Nic J A, van der Werff, Steven J A, van Haren, Neeltje E M, van Wingen, Guido A, Vance, Alasdair, Vázquez-Bourgon, Javier, Vecchio, Daniela, Venkatasubramanian, Ganesan, Auzias, Guillaume, Vieta, Eduard, Vilarroya, Oscar, Vives-Gilabert, Yolanda, Voineskos, Aristotle N, Völzke, Henry, von Polier, Georg G, Walton, Esther, Weickert, Thomas W, Weickert, Cynthia Shannon, Weideman, Andrea S, Ayesa-Arriola, Rosa, Wittfeld, Katharina, Wolf, Daniel H, Wu, Mon-Ju, Yang, T. T., Yang, Sikun, Yoncheva, Yuliya, Yun, Je-Yeon, Cheng, Yuqi, Zanetti, Marcus V, Ziegler, Georg C, Bakker, Geor, Franke, Barbara, Hoogman, Martine, Buitelaar, Jan K, van Rooij, Daan, Andreassen, Ole A, Ching, Christopher R K, Veltman, Dick J, Schmaal, Lianne, Stein, Dan J, van den Heuvel, Odile A, Disorder, Major Depressive, Banaj, Nerisa, Turner, Jessica A, van Erp, Theo G M, Pausova, Zdenka, Thompson, Paul M, Paus, Tomáš, Attention-Deficit/Hyperactivity Disorder, Banaschewski, Tobias, Bandeira, Cibele E, Baranov, Alexandr, Bargalló, Núria, Bau, Claiton H D, Baumeister, Sarah, Baune, Bernhard T, Bellgrove, Mark A, Benedetti, Francesco, Disorder, Obsessive-Compulsive, Bertolino, Alessandro, Boedhoe, Premika S W, Boks, Marco, Bollettini, Irene, Del Mar Bonnin, Caterina, Borgers, Tiana, Borgwardt, Stefan, Brandeis, Daniel, Brennan, Brian P, Bruggemann, Jason M, Groups, Schizophrenia ENIGMA Working, Bülow, Robin, Busatto, Geraldo F, Calderoni, Sara, Calhoun, Vince D, Calvo, Rosa, Canales-Rodríguez, Erick J, Cannon, Dara M, Carr, Vaughan J, Cascella, Nicola, Cercignani, Mara, Patel, Yash, Chaim-Avancini, Tiffany M, Christakou, Anastasia, Coghill, David, Conzelmann, Annette, Crespo-Facorro, Benedicto, Cubillo, Ana I, Cullen, Kathryn R, Cupertino, Renata B, Daly, Eileen, Dannlowski, Udo, Parker, Nadine, Davey, Christopher G, Denys, Damiaan, Deruelle, Christine, Di Giorgio, Annabella, Dickie, Erin W, Dima, Danai, Dohm, Katharina, Ehrlich, Stefan, Ely, Benjamin A, Erwin-Grabner, Tracy, Shin, Jean, Ethofer, Thomas, Fair, Damien A, Fallgatter, Andreas, Faraone, Stephen V, Fatjó-Vilas, Mar, Fedor, Jennifer M, Fitzgerald, Kate D, Ford, Judith M, Frodl, Thomas, Fu, Cynthia H Y, Howard, Derek, Fullerton, Janice M, Gabel, Matt C, Glahn, David C, Roberts, Gloria, Gogberashvili, Tinatin, Goikolea, Jose M, Gotlib, Ian H, Goya-Maldonado, Roberto, Grabe, Hans, Green, Melissa J, Patel, Y., Parker, N., Shin, J., Howard, D., French, L., Thomopoulos, S. I., Pozzi, E., Abe, Y., Abe, C., Anticevic, A., Alda, M., Aleman, A., Alloza, C., Alonso-Lana, S., Ameis, S. H., Anagnostou, E., Mcintosh, A. A., Arango, C., Arnold, P. D., Asherson, P., Assogna, F., Auzias, G., Ayesa-Arriola, R., Bakker, G., Banaj, N., Banaschewski, T., Bandeira, C. E., Baranov, A., Bargallo, N., Bau, C. H. D., Baumeister, S., Baune, B. T., Bellgrove, M. A., Benedetti, F., Bertolino, A., Boedhoe, P. S. W., Boks, M., Bollettini, I., Del Mar Bonnin, C., Borgers, T., Borgwardt, S., Brandeis, D., Brennan, B. P., Bruggemann, J. M., Bulow, R., Busatto, G. F., Calderoni, S., Calhoun, V. D., Calvo, R., Canales-Rodriguez, E. J., Cannon, D. M., Carr, V. J., Cascella, N., Cercignani, M., Chaim-Avancini, T. M., Christakou, A., Coghill, D., Conzelmann, A., Crespo-Facorro, B., Cubillo, A. I., Cullen, K. R., Cupertino, R. B., Daly, E., Dannlowski, U., Davey, C. G., Denys, D., Deruelle, C., Di Giorgio, A., Dickie, E. W., Dima, D., Dohm, K., Ehrlich, S., Ely, B. A., Erwin-Grabner, T., Ethofer, T., Fair, D. A., Fallgatter, A. J., Faraone, S. V., Fatjo-Vilas, M., Fedor, J. M., Fitzgerald, K. D., Ford, J. M., Frodl, T., Fu, C. H. Y., Fullerton, J. M., Gabel, M. C., Glahn, D. C., Roberts, G., Gogberashvili, T., Goikolea, J. M., Gotlib, I. H., Goya-Maldonado, R., Grabe, H. J., Green, M. J., Grevet, E. H., Groenewold, N. A., Grotegerd, D., Gruber, O., Gruner, P., Guerrero-Pedraza, A., Gur, R. E., Gur, R. C., Haar, S., Haarman, B. C. M., Haavik, J., Hahn, T., Hajek, T., Harrison, B. J., Harrison, N. A., Hartman, C. A., Whalley, H. C., Heslenfeld, D. J., Hibar, D. P., Hilland, E., Hirano, Y., Ho, T. C., Hoekstra, P. J., Hoekstra, L., Hohmann, S., Hong, L. E., Hoschl, C., Hovik, M. F., Howells, F. M., Nenadic, I., Jalbrzikowski, M., James, A. C., Janssen, J., Jaspers-Fayer, F., Xu, J., Jonassen, R., Karkashadze, G., King, J. A., Kircher, T., Kirschner, M., Koch, K., Kochunov, P., Kohls, G., Konrad, K., Kramer, B., Krug, A., Kuntsi, J., Kwon, J. S., Landen, M., Landro, N. I., Lazaro, L., Lebedeva, I. S., Leehr, E. J., Lera-Miguel, S., Lesch, K. -P., Lochner, C., Louza, M. R., Luna, B., Lundervold, A. J., Macmaster, F. P., Maglanoc, L. A., Malpas, C. B., Portella, M. J., Marsh, R., Martyn, F. M., Mataix-Cols, D., Mathalon, D. H., Mccarthy, H., Mcdonald, C., Mcphilemy, G., Meinert, S., Menchon, J. M., Minuzzi, L., Mitchell, P. B., Moreno, C., Morgado, P., Muratori, F., Murphy, C. M., Murphy, D., Mwangi, B., Nabulsi, L., Nakagawa, A., Nakamae, T., Namazova, L., Narayanaswamy, J., Jahanshad, N., Nguyen, D. D., Nicolau, R., O'Gorman Tuura, R. L., O'Hearn, K., Oosterlaan, J., Opel, N., Ophoff, R. A., Oranje, B., Garcia De La Foz, V. O., Overs, B. J., Paloyelis, Y., Pantelis, C., Parellada, M., Pauli, P., Pico-Perez, M., Picon, F. A., Piras, F., Plessen, K. J., Pomarol-Clotet, E., Preda, A., Puig, O., Quide, Y., Radua, J., Ramos-Quiroga, J. A., Rasser, P. E., Rauer, L., Reddy, J., Redlich, R., Reif, A., Reneman, L., Repple, J., Retico, A., Richarte, V., Richter, A., Rosa, P. G. P., Rubia, K. K., Hashimoto, R., Sacchet, M. D., Salvador, R., Santonja, J., Sarink, K., Sarro, S., Satterthwaite, T. D., Sawa, A., Schall, U., Schofield, P. R., Schrantee, A., Seitz, J., Serpa, M. H., Setien-Suero, E., Shaw, P., Shook, D., Silk, T. J., Sim, K., Simon, S., Simpson, H. B., Singh, A., Skoch, A., Skokauskas, N., Soares, J. C., Soreni, N., Soriano-Mas, C., Spalletta, G., Spaniel, F., Lawrie, S. M., Stern, E. R., Stewart, S. E., Takayanagi, Y., Temmingh, H. S., Tolin, D. F., Tomecek, D., Tordesillas-Gutierrez, D., Tosetti, M., Uhlmann, A., Van Amelsvoort, T., Van Der Wee, N. J. A., Van Der Werff, S. J. A., Van Haren, N. E. M., Van Wingen, G. A., Vance, A., Vazquez-Bourgon, J., Vecchio, D., Venkatasubramanian, G., Vieta, E., Vilarroya, O., Vives-Gilabert, Y., Voineskos, A. N., Volzke, H., Von Polier, G. G., Walton, E., Weickert, T. W., Weickert, C. S., Weideman, A. S., Wittfeld, K., Wolf, D. H., Wu, M. -J., Yang, T. T., Yang, K., Yoncheva, Y., Yun, J. -Y., Cheng, Y., Zanetti, M. V., Ziegler, G. C., Franke, B., Hoogman, M., Buitelaar, J. K., Van Rooij, D., Andreassen, O. A., Ching, C. R. K., Veltman, D. J., Schmaal, L., Stein, D. J., Van Den Heuvel, O. A., Turner, J. A., Van Erp, T. G. M., Pausova, Z., Thompson, P. M., Paus, T., Institut de Neurosciences de la Timone (INT), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Pediatric surgery, Radiology and nuclear medicine, Anatomy and neurosciences, Psychiatry, Amsterdam Neuroscience - Brain Imaging, Amsterdam Neuroscience - Compulsivity, Impulsivity & Attention, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, Amsterdam Neuroscience - Neurodegeneration, Psychiatrie & Neuropsychologie, RS: MHeNs - R2 - Mental Health, MUMC+: MA Med Staf Spec Psychiatrie (9), Adult Psychiatry, ANS - Compulsivity, Impulsivity & Attention, General Paediatrics, ARD - Amsterdam Reproduction and Development, Radiology and Nuclear Medicine, APH - Personalized Medicine, ANS - Brain Imaging, ANS - Mood, Anxiety, Psychosis, Stress & Sleep, APH - Mental Health, University of Zurich, Clinical Cognitive Neuropsychiatry Research Program (CCNP), Clinical Neuropsychology, Interdisciplinary Centre Psychopathology and Emotion regulation (ICPE), Child and Adolescent Psychiatry / Psychology, IBBA, and Cognitive Psychology
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Male ,Obsessive-Compulsive Disorder ,Bipolar Disorder ,Autism Spectrum Disorder ,Autism ,[SDV]Life Sciences [q-bio] ,Gene Expression ,cytology [Cerebral Cortex] ,Cohort Studies ,Fetal Development ,physiology [Gene Expression] ,2738 Psychiatry and Mental Health ,0302 clinical medicine ,diagnostic imaging [Cerebral Cortex] ,SCHIZOPHRENIA ,BRAIN ,Child ,Obsessive-compulsive disorder (OCD) ,Original Investigation ,Aged, 80 and over ,Cerebral Cortex ,0303 health sciences ,pathology [Depressive Disorder, Major] ,Principal Component Analysis ,Adolescent psychiatry ,10058 Department of Child and Adolescent Psychiatry ,Middle Aged ,diagnostic imaging [Obsessive-Compulsive Disorder] ,REGIONS ,Magnetic Resonance Imaging ,3. Good health ,FALSE DISCOVERY RATE ,Psychiatry and Mental health ,Autism spectrum disorder ,Schizophrenia ,growth & development [Cerebral Cortex] ,Child, Preschool ,Major depressive disorder ,diagnostic imaging [Schizophrenia] ,Esquizofrènia ,Female ,Psiquiatria infantil ,Psiquiatria de l'adolescència ,diagnostic imaging [Autism Spectrum Disorder] ,Adult ,medicine.medical_specialty ,Adolescent ,Human Development ,610 Medicine & health ,diagnostic imaging [Bipolar Disorder] ,pathology [Autism Spectrum Disorder] ,diagnostic imaging [Depressive Disorder, Major] ,03 medical and health sciences ,Young Adult ,All institutes and research themes of the Radboud University Medical Center ,Neuroimaging ,SDG 3 - Good Health and Well-being ,CEREBRAL-CORTEX ,Child psychiatry ,medicine ,Attention deficit hyperactivity disorder ,Humans ,Bipolar disorder ,ddc:610 ,Psychiatry ,pathology [Schizophrenia] ,030304 developmental biology ,Aged ,Depressive Disorder, Major ,Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7] ,business.industry ,DENDRITE ,Computational Biology ,Correction ,pathology [Attention Deficit Disorder with Hyperactivity] ,physiology [Fetal Development] ,medicine.disease ,PATHOLOGY ,pathology [Bipolar Disorder] ,pathology [Obsessive-Compulsive Disorder] ,10036 Medical Clinic ,Attention Deficit Disorder with Hyperactivity ,10054 Clinic for Psychiatry, Psychotherapy, and Psychosomatics ,Case-Control Studies ,DENSITY ,ORIGINS ,HIPPOCAMPUS ,diagnostic imaging [Attention Deficit Disorder with Hyperactivity] ,pathology [Cerebral Cortex] ,Autisme ,business ,Neuroscience ,030217 neurology & neurosurgery ,physiology [Human Development] - Abstract
[Importance] Large-scale neuroimaging studies have revealed group differences in cortical thickness across many psychiatric disorders. The underlying neurobiology behind these differences is not well understood., [Objective] To determine neurobiologic correlates of group differences in cortical thickness between cases and controls in 6 disorders: attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder (ASD), bipolar disorder (BD), major depressive disorder (MDD), obsessive-compulsive disorder (OCD), and schizophrenia., [Design, Setting, and Participants] Profiles of group differences in cortical thickness between cases and controls were generated using T1-weighted magnetic resonance images. Similarity between interregional profiles of cell-specific gene expression and those in the group differences in cortical thickness were investigated in each disorder. Next, principal component analysis was used to reveal a shared profile of group difference in thickness across the disorders. Analysis for gene coexpression, clustering, and enrichment for genes associated with these disorders were conducted. Data analysis was conducted between June and December 2019. The analysis included 145 cohorts across 6 psychiatric disorders drawn from the ENIGMA consortium. The numbers of cases and controls in each of the 6 disorders were as follows: ADHD: 1814 and 1602; ASD: 1748 and 1770; BD: 1547 and 3405; MDD: 2658 and 3572; OCD: 2266 and 2007; and schizophrenia: 2688 and 3244., [Main Outcomes and Measures] Interregional profiles of group difference in cortical thickness between cases and controls., [Results] A total of 12 721 cases and 15 600 controls, ranging from ages 2 to 89 years, were included in this study. Interregional profiles of group differences in cortical thickness for each of the 6 psychiatric disorders were associated with profiles of gene expression specific to pyramidal (CA1) cells, astrocytes (except for BD), and microglia (except for OCD); collectively, gene-expression profiles of the 3 cell types explain between 25% and 54% of variance in interregional profiles of group differences in cortical thickness. Principal component analysis revealed a shared profile of difference in cortical thickness across the 6 disorders (48% variance explained); interregional profile of this principal component 1 was associated with that of the pyramidal-cell gene expression (explaining 56% of interregional variation). Coexpression analyses of these genes revealed 2 clusters: (1) a prenatal cluster enriched with genes involved in neurodevelopmental (axon guidance) processes and (2) a postnatal cluster enriched with genes involved in synaptic activity and plasticity-related processes. These clusters were enriched with genes associated with all 6 psychiatric disorders., [Conclusions and Relevance] In this study, shared neurobiologic processes were associated with differences in cortical thickness across multiple psychiatric disorders. These processes implicate a common role of prenatal development and postnatal functioning of the cerebral cortex in these disorders.
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- 2021
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214. Ein Verfahren zur lexikographischen modellprädiktiven Regelung mit der Anwendung auf eine permanenterregte Synchronmaschine
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Schnurr, Christoph Xaver and Hohmann, S.
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Modellpr��diktive Regelung (MPR) ,Multi-Objective Optimization ,Permanentmagneterregte Synchronmaschine (PSM) ,Projected Fast Gradient Method (PFGM) ,Lexicographic Optimization ,Permanent Magnet Synchronous Machine (PMSM) ,Model Predictive Control (MPC) ,lexikographische Optimierung ,ddc:620 ,Modellprädiktive Regelung (MPR) ,Engineering & allied operations ,multikriterielle Optimierung - Abstract
Bei der konventionellen Drehmomentregelung von Permanentmagneterregten Synchronmaschinen (PSM) werden Solldrehmomente unter der Berücksichtigung von Leistungsverlusten durch statische Kennfelder in Sollströme überführt. Dieses Vorgehen ist dynamisch suboptimal, interdependent und stark maschinenabhängig. Diese Arbeit widmet sich der Frage: Wie kann ein Model Predictive Controller (MPC) entworfen werden, durch welchen die Ziele Drehmomenterreichung und Verlustminimierung simultan optimiert werden und wie können die gesteigerten Anforderungen in der Elektromobilität durch diesen Ansatz erfüllt werden? Hierfür wird die Beschreibung des Regelziels im MPC als multikriterielles lexikographisches Optimierungsproblem (LOP) formuliert, was einer strengen Priorisierung der beiden Regelziele entspricht. Um diesen Ansatz für echtzeitfähige Systeme tauglich zu machen, wird für die Integration des LOP in den MPC eine neue Methode vorgeschlagen, die beide Regelziele in eine Gütefunktion transformiert. Die Anforderungen der Elektromobilität werden im MPC durch die Berücksichtigung der Nichtlinearität des magnetischen Kreises – insbesondere Sättigung, Reluktanz und Kreuzverkopplung – sowie exakter Spannungs- und Strombegrenzung berücksichtigt. Durch die neue zugeschnittene Methode wird die mittlere Berechnungszeit des LOP deutlich verringert und gleichzeitig das Regelergebnis verbessert. Die Analyse der Potentiale dieses Ansatzes erfolgt im Vergleich mit einem PI-Zustandsregler durch die Untersuchung der jeweils erzielbaren Regelergebnisse in anwendungsnahen Szenarien. Bei der Anwendung der Regler auf die Kompensation von Getriebeschwingungen im Antriebsstrang eines Elektrofahrzeugs zeigt das vorgeschlagene Verfahren zusätzliche Potentiale für schnelle dynamische Vorgänge an den Betriebsgrenzen.
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- 2021
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215. Automatisierte kooperative Transition einer Regelungsaufgabe zwischen Mensch und Maschine am Beispiel des hochautomatisierten Fahrens
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Ludwig, Julian, Hohmann, S., Hohmann, Sören, and Bengler, Klaus
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Mensch-Maschine-Interaktion ,differential games ,Übernahmebereitschaft ,readiness to takeover ,Haptic-Shared-Control ,Fahrsimulator ,Hochautomatisiertes Fahren ,human-machine-interaction ,ddc:620 ,Differentialspiele ,Engineering & allied operations ,Übergabe ,SAE Level 3 - Abstract
Diese Arbeit befasst sich mit der Frage, wie ein Transfer einer Aufgabe zwischen Mensch und Maschine gestaltet werden kann, um die Qualität und Sicherheit während des gesamten Übergabeprozesses zu gewährleisten. Dazu wird eine Beschreibung der Mensch-Maschine-Interaktion mit Hilfe von zeitvarianten Differentialspielen vorgeschlagen, welche einen modellbasierten Reglerentwurf ermöglicht. Durch haptische Interaktion am Stellglied wird der Mensch optimal unterstützt und sicher an die Aufgabe heranführt. Darüber hinaus wurde in dieser Arbeit eine Methodik entwickelt, um die aktuelle Bereitschaft des Menschen zur Laufzeit zu schätzen und den Transitionsprozess entsprechend anzupassen. Der Anwendung der Methoden auf der Übernahme der Fahraufgabe nach einer hochautomatisierten Fahrt resultiert im Gegensatz zum Stand der Technik in sicheren und kontrollierten Fahrmänövern.
- Published
- 2020
216. Verteilte Zustandsschätzung fraktionaler Systeme und ihre Anwendung auf Lithium-Ionen-Batteriesysteme
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Kupper, Martin and Hohmann, S.
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distributed systems ,fraktionale Systeme ,verteilte Systeme ,Kalman filter ,state estimation ,fractional systems ,ddc:620 ,Zustandsschätzung ,Lithium-Ionen-Batterien ,lithium ion batteries ,Engineering & allied operations ,Kalman-Filter - Abstract
Es ist notwendig, dass die Zustände aller Zellen innerhalb einer Lithium-Ionen-Batterie bekannt sind, um einen sicheren und optimalen Betrieb zu gewährleisten. Zur Ermittlung dieser Zustände werden in dieser Arbeit drei neue Methoden zur verteilten Zustandsschätzung hergeleitet, welche auf fraktionalen Modellen und dem Kalman-Filter basieren. Mithilfe dieser Verfahren lassen sich zusätzlich die Teilströme der Batterie schätzen, wodurch sich Sensoren einsparen lassen.
- Published
- 2019
217. Modellierung und zentrale prädiktive Regelung von multimodalen Energieverteilnetzen
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Sauter, Patrick S. and Hohmann, S.
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distribution grid ,erneuerbare Energien ,multimodale Energiesysteme ,Verteilnetz ,Multi-Carrier Energy (MCE) System ,Modellprädiktive Regelung (MPC) ,Model predictive control ,ddc:620 ,renewable energy ,Engineering & allied operations - Abstract
In dieser Arbeit wird ein prädiktives Regelungskonzept für multimodale Energieverteilsysteme vorgestellt. Zunächst wird ein durchgängiges Modellierungskonzept für alle Arten von multimodalen Verteilnetzzellen entwickelt. Mithilfe dieser Modelle wird dann eine modellprädiktive Regelungsstrategie zum optimalen Betrieb des multimodalen Energieverteilsystems entworfen. Die Ergebnisse zeigen, dass sowohl eine Betriebskostenreduktion, als auch eine lokalere Nutzung von EE erreicht werden kann.
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- 2019
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218. Intervallbeobachter für lineare parametervariante Systeme und deren Anwendung auf die Asynchronmaschine
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Krebs, Stefan and Hohmann, S.
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interval observer ,Wechselrichter ,Intervallbeobachter ,Lineare parametervariante Systeme ,linear parameter-varying systems ,state estimation ,voltage source inverter ,ddc:620 ,Zustandsschätzung ,Asynchronmaschine ,induction motor ,Engineering & allied operations - Abstract
Diese Arbeit widmet sich der Entwicklung zweier neuer Methoden zur Bestimmung von Zustandsmengen für lineare parametervariante Systeme. Erzeugt werden diese Zustandsmengen in Form von Intervallvektoren durch Intervallbeobachter auf Basis von unbekannten, aber beschränkten Unsicherheiten der Ein-/ Ausgangsgrößen und der Parameter. In Kombination mit einem neuartigen Intervallmodell des Wechselrichters wird die Wirksamkeit der Methoden am Beispiel der Asynchronmaschine gezeigt.
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- 2018
219. Identifikation des menschlichen Bewegungsverhaltens auf der Basis von Primitiven
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Diehm, Gunter and Hohmann, S.
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model ,Identifikation ,motor primitives ,Bewegungsprimitive ,identification ,prediction ,ddc:620 ,Modell ,Prädiktion ,Lenkbewegungen ,steering movements ,Engineering & allied operations - Abstract
Für die Vorhersage gezielter menschlicher Bewegungen ist eine Modellierung der Bewegungskontrolle unter Berücksichtigung von diskreten Bewegungsprimitiven wichtig. Neben der Herleitung eines auf neurobiologischen Erkenntnissen basierenden formalen Bewegungsmodells liefert diese Arbeit auch neuartige Verfahren zur gesicherten Bestimmung der Modellparameter. Die Verfahren werden am Beispiel der Prädiktion von Lenkbewegungen im Kraftfahrzeug demonstriert.
- Published
- 2017
220. Kooperative Regelungskonzepte auf Basis der Spieltheorie und deren Anwendung auf Fahrerassistenzsysteme
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Flad, Michael and Hohmann, S.
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Optimale Regelung ,Spieltheorie ,Optimal Control ,Kooperative Regelung ,Human-Machine-Cooperation ,Mensch-Maschine-Kooperation ,Optimalregelung ,Game Theory ,Regelungstechnik ,Cooperative Control ,Fahrerassistenzsysteme ,Advanced driver-assistance systems ,ddc:620 ,Engineering & allied operations - Abstract
Diese Arbeit betrachtet Regelkreise, in denen die Regelaufgabe von Menschen und maschinellen Reglern gemeinsam ausgeführt wird. Für diese maschinellen Regler wird systematisch ein formalisiertes Regelkonzept abgeleitet. Ein wesentlicher Teil der Arbeit besteht in der Entwicklung von Algorithmen für die Implementierung. Als Anwendungsbeispiel werden zwei kooperative Fahrerassistenzsysteme vorgestellt. Am Fahrsimulator durchgeführte Studien zeigen eine deutliche Verbesserung des Fahrverhaltens aber auch des Kraftstoffverbrauchs.
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- 2017
221. Strategies for structuring interdisciplinary education in Systems Biology: an European perspective
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Daniela Besozzi, Babette Regierer, Heide Marie Hess, Jure Acimovic, Eivind Almaas, Marta Cascante, Marcus Krantz, Marija Cvijovic, Ursula Kummer, Angela Mauer-Oberthür, Torbjörn Lundh, Egils Stalidzans, Stefan Hohmann, Vitor A. P. Martins dos Santos, Didier Gonze, Susanne Hollmann, Lilia Alberghina, Till Bretschneider, Cornelia Depner, Pedro de Atauri, Gifta Martial, Barbara Skene, Anders Blomberg, Thomas Höfer, Jordi Garcia-Ojalvo, Maciej Dobrzyński, Jens Hahn, Olivier Collin, Robert Julian Dickinson, Christian Fleck, Bas Teusink, Jörg Stelling, Christopher T. Workman, Cvijovic, M, Höfer, T, Aćimović, J, Alberghina, L, Almaas, E, Besozzi, D, Blomberg, A, Bretschneider, T, Cascante, M, Collin, O, de Atauri, P, Depner, C, Dickinson, R, Dobrzynski, M, Fleck, C, Garcia Ojalvo, J, Gonze, D, Hahn, J, Hess, H, Hollmann, S, Krantz, M, Kummer, U, Lundh, T, Martial, G, dos Santos, V, Mauer Oberthür, A, Regierer, B, Skene, B, Stalidzans, E, Stelling, J, Teusink, B, Workman, C, Hohmann, S, Systems Bioinformatics, and AIMMS
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0301 basic medicine ,Engineering ,Systems biology ,media_common.quotation_subject ,Structuring ,General Biochemistry, Genetics and Molecular Biology ,Article ,Education ,03 medical and health sciences ,0302 clinical medicine ,Excellence ,Multidisciplinary approach ,Drug Discovery ,ComputingMilieux_COMPUTERSANDEDUCATION ,Life Science ,Systems and Synthetic Biology ,Innovation ,Curriculum ,media_common ,VLAG ,Flexibility (engineering) ,Systeem en Synthetische Biologie ,Science & Technology ,Management science ,business.industry ,4. Education ,Applied Mathematics ,INF/01 - INFORMATICA ,GAP ,Généralités ,Systems Biology, Training and education ,3. Good health ,Computer Science Applications ,030104 developmental biology ,Action (philosophy) ,Modeling and Simulation ,and Infrastructure ,SDG 9 - Industry, Innovation, and Infrastructure ,Mathematical & Computational Biology ,business ,Discipline ,SDG 9 - Industry ,Life Sciences & Biomedicine ,030217 neurology & neurosurgery - Abstract
Systems Biology is an approach to biology and medicine that has the potential to lead to a better understanding of how biological properties emerge from the interaction of genes, proteins, molecules, cells and organisms. The approach aims at elucidating how these interactions govern biological function by employing experimental data, mathematical models and computational simulations. As Systems Biology is inherently multidisciplinary, education within this field meets numerous hurdles including departmental barriers, availability of all required expertise locally, appropriate teaching material and example curricula. As university education at the Bachelor’s level is traditionally built upon disciplinary degrees, we believe that the most effective way to implement education in Systems Biology would be at the Master’s level, as it offers a more flexible framework. Our team of experts and active performers of Systems Biology education suggest here (i) a definition of the skills that students should acquire within a Master’s programme in Systems Biology, (ii) a possible basic educational curriculum with flexibility to adjust to different application areas and local research strengths, (iii) a description of possible career paths for students who undergo such an education, (iv) conditions that should improve the recruitment of students to such programmes and (v) mechanisms for collaboration and excellence spreading among education professionals. With the growing interest of industry in applying Systems Biology approaches in their fields, a concerted action between academia and industry is needed to build this expertise. Here we present a reflection of the European situation and expertise, where most of the challenges we discuss are universal, anticipating that our suggestions will be useful internationally. We believe that one of the overriding goals of any Systems Biology education should be a student’s ability to phrase and communicate research questions in such a manner that they can be solved by the integration of experiments and modelling, as well as to communicate and collaborate productively across different experimental and theoretical disciplines in research and development., npj Systems Biology and Applications, 2, ISSN:2056-7189
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- 2016
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222. Physiological roles of aquaporins in the kidney
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Knepper, M.A., Nielsen, S., Chou, C.-L., Hohmann, S., Nielsen, S., and Agre, P.
- Published
- 2001
223. Molecular cloning of a gene involved in glucose sensing in the yeast Saccharomyces cerevisiae
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Wim de Koning, Peter Durnez, Laurens Sierkstra, José Ramos, Stefan Hohmann, K Luyten, Maria José Neves, Patrick Van Dijck, Botchaka Bulaya, Linda Van Aelst, Johan M. Thevelein, Neuza Maria de Magalhães-Rocha, Rogélio Lopes Brandão, Mieke Vanhalewyn, Paola Coccetti, R Alijo, Enzo Martegani, Van Aelst, L, Hohmann, S, Bulaya, B, de Koning, W, Sierkstra, L, Neves, M, Luyten, K, Alijo, R, Ramos, J, Coccetti, P, Martegani, E, de Magalhães‐Rocha, N, Brandão, R, Van Dijck, P, Vanhalewyn, M, Durnez, P, Null, A, and Thevelein, J
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Glycoside Hydrolases ,Saccharomyces cerevisiae ,Mutant ,Genes, Fungal ,Molecular Sequence Data ,Catabolite repression ,Biology ,Microbiology ,Gene product ,Open Reading Frames ,Gene Expression Regulation, Fungal ,Hexokinase ,Sequence Homology, Nucleic Acid ,Genes, Regulator ,Sugar transporter ,Amino Acid Sequence ,Cloning, Molecular ,Genes, Suppressor ,Molecular Biology ,Alleles ,Regulation of gene expression ,Base Sequence ,beta-Fructofuranosidase ,Methanobacterium ,alpha-Glucosidases ,Metabolism ,biology.organism_classification ,Yeast ,Glucose ,Phenotype ,Biochemistry ,Glucosyltransferases ,Enzyme Induction ,Glycolysis ,Gene Deletion ,Signal Transduction - Abstract
Cells of the yeast Saccharomyces cerevisiae display a wide range of glucose‐induced regulatory phenomena, including glucose‐induced activation of the RAS‐adenylate cyclase pathway and phosphatidylinositol turnover, rapid post‐translational effects on the activity of different enzymes as well as long‐term effects at the transcriptional level. A gene called GGS1 (for General Glucose Sensor) that is apparently required for the glucose‐induced regulatory effects and several ggs1 alleles (fdp1, byp1 and cif1) has been cloned and characterized. A GGS1 homologue is present in Methanobacterium thermoautotrophicum. Yeast ggs1 mutants are unable to grow on glucose or related readily fermentable sugars, apparently owing to unrestricted influx of sugar into glycolysis, resulting in its rapid deregulation. Levels of intracellular free glucose and metabolites measured over a period of a few minutes after addition of glucose to cells of a ggsi1Δ strain are consistent with our previous suggestion of a functional interaction between a sugar transporter, a sugar kinase and the GGS1 gene product. Such a glucose‐sensing system might both restrict the influx of glucose and activate several signal transduction pathways, leading to the wide range of glucose‐induced regulatory phenomena. Deregulation of these pathways in ggs1 mutants might explain phenotypic defects observed in the absence of glucose, e.g. the inability of ggs1 diploids to sporulate. Copyright © 1993, Wiley Blackwell. All rights reserved
- Published
- 1993
224. Characterizing neuroanatomic heterogeneity in people with and without ADHD based on subcortical brain volumes
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Li, Ting, Rooij, Daan, Roth Mota, Nina, Buitelaar, Jan K., Hoogman, Martine, Arias Vasquez, Alejandro, Franke, Barbara, Ambrosino, Sara, Banaschewski, Tobias, Bandeira, Cibele E., Bau, Claiton H.D., Baumeister, Sarah, Baur‐Streubel, Ramona, Bellgrove, Mark A., Biederman, Joseph, Bralten, Janita, Bramati, Ivanei E., Brandeis, Daniel, Berm, Silvia, Busatto, Geraldo F., Calvo, Anna, Castellanos, Francisco X., Cercignani, Mara, Chantiluke, Kaylita C., Christakou, Anastasia, Coghill, David, Conzelmann, Annette, Cubillo, Ana I., Cupertino, Renata B., Zeeuw, Parick, Durston, Sarah, Earl, Eric A., Epstein, Jeffery N., Ethofer, Thomas, Fallgatter, Andreas J., Fair, Damien A., Faraone, Stephen V., Frodl, Thomas, Gabel, Matt C., Gogberashvili, Tinatin, Grevet, Eugenio H., Haavik, Jan, Harrison, Neil A., Hartman, Catharina A., Heslenfeld, Dirk J., Hoekstra, Pieter J., Høvik, Marie F., Jahanshad, Neda, Kardatzki, Bernd, Karkashadze, Georgii, Kelly, Clare, Kohls, Gregor, Konrad, Kerstin, Kuntsi, Jonna, Lazaro, Luisa, Lera‐Miguel, Sara, Lesch, Klaus‐Peter, Louza, Mario R., Lundervold, Astri J., Malpas, Charles B., Mattos, Paulo, McCarthy, Hazel, Nicolau, Rosa, Nigg, Joel T., O'Gorman Tuura, Ruth L., Oosterlaan, Jaap, Oranje, Bob, Paloyelis, Yannis, Pauli, Paul, Picon, Felipe A., Plessen, Kerstin J., Ramos‐Quiroga, J. Antoni, Reif, Andreas, Reneman, Liesbeth, Rosa, Pedro G.P., Rubia, Katya, Schrantee, Anouk, Schweren, Lizanne J.S., Seitz, Jochen, Shaw, Philip, Silk, Tim J., Skokauskas, Norbert, Carlos Soliva Vila, Juan, Soloveva, Anastasiia, Stevens, Michael C., Sudre, Gustavo, Tamm, Leanne, Thompson, Paul M., Tovar‐Moll, Fernanda, Erp, Theo GM, Vance, Alasdair, Vilarroya, Oscar, Vives‐Gilabert, Yolanda, Polier, Georg G., Walitza, Susanne, Yoncheva, Yuliya N., Zanetti, Marcus V., Ziegler, Georg C., Anikin, Anatoly, Asherson, Philip, Baranov, Alexandr, Chaim‐Avanicini, Tiffany, Dale, Anders M., Doyle, Alysa E., Jernigan, Terry, Hohmann, Sarah, Kapilushniy, Dmitry, Mehta, Mitul, Namazova‐Baranova, Leyla, Novotny, Stephanie E., Oberwelland Weiss, Eileen, Schwarz, Lena, General Paediatrics, ARD - Amsterdam Reproduction and Development, Radiology and Nuclear Medicine, APH - Mental Health, APH - Personalized Medicine, ANS - Brain Imaging, ANS - Compulsivity, Impulsivity & Attention, ENIGMA ADHD Working Group, Ambrosino, S., Banaschewski, T., Bandeira, C.E., Bau, CHD, Baumeister, S., Baur-Streubel, R., Bellgrove, M.A., Biederman, J., Bralten, J., Bramati, I.E., Brandeis, D., Berm, S., Busatto, G.F., Calvo, A., Castellanos, F.X., Cercignani, M., Chantiluke, K.C., Christakou, A., Coghill, D., Conzelmann, A., Cubillo, A.I., Cupertino, R.B., de Zeeuw, P., Durston, S., Earl, E.A., Epstein, J.N., Ethofer, T., Fallgatter, A.J., Fair, D.A., Faraone, S.V., Frodl, T., Gabel, M.C., Gogberashvili, T., Grevet, E.H., Haavik, J., Harrison, N.A., Hartman, C.A., Heslenfeld, D.J., Hoekstra, P.J., Høvik, M.F., Jahanshad, N., Kardatzki, B., Karkashadze, G., Kelly, C., Kohls, G., Konrad, K., Kuntsi, J., Lazaro, L., Lera-Miguel, S., Lesch, K.P., Louza, M.R., Lundervold, A.J., Malpas, C.B., Mattos, P., McCarthy, H., Nicolau, R., Nigg, J.T., O'Gorman Tuura, R.L., Oosterlaan, J., Oranje, B., Paloyelis, Y., Pauli, P., Picon, F.A., Plessen, K.J., Ramos-Quiroga, J.A., Reif, A., Reneman, L., Rosa, PGP, Rubia, K., Schrantee, A., Schweren, LJS, Seitz, J., Shaw, P., Silk, T.J., Skokauskas, N., Carlos Soliva Vila, J., Soloveva, A., Stevens, M.C., Sudre, G., Tamm, L., Thompson, P.M., Tovar-Moll, F., van Erp, T.G., Vance, A., Vilarroya, O., Vives-Gilabert, Y., von Polier, G.G., Walitza, S., Yoncheva, Y.N., Zanetti, M.V., Ziegler, G.C., Anikin, A., Asherson, P., Baranov, A., Chaim-Avanicini, T., Dale, A.M., Doyle, A.E., L Jernigan, T., Hohmann, S., Kapilushniy, D., Mehta, M., Namazova-Baranova, L., Novotny, S.E., Oberwelland Weiss, E., and Schwarz, L.
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Adult ,Attention Deficit Disorder with Hyperactivity/diagnostic imaging ,Attention Deficit Disorder with Hyperactivity/epidemiology ,Brain/diagnostic imaging ,Case-Control Studies ,Female ,Humans ,Magnetic Resonance Imaging ,Male ,Thalamus/diagnostic imaging ,ADHD ,community detection ,effect sizes ,neuroanatomic heterogeneity ,subcortical volume ,INCREASED EFFECT ,0302 clinical medicine ,Limbic system ,Neurodevelopmental disorder ,Thalamus ,130 000 Cognitive Neurology & Memory ,Basal ganglia ,Developmental and Educational Psychology ,Psychology ,Pediatric ,0303 health sciences ,05 social sciences ,Brain ,Exploratory factor analysis ,Psychiatry and Mental health ,Mental Health ,medicine.anatomical_structure ,Attention Deficit Disorder (ADD) ,Cognitive Sciences ,Original Article ,050104 developmental & child psychology ,Clinical psychology ,Clinical Sciences ,Patient subgroups ,Developmental & Child Psychology ,03 medical and health sciences ,ENIGMA ADHD Working Group ,Clinical Research ,mental disorders ,medicine ,In patient ,0501 psychology and cognitive sciences ,ddc:610 ,030304 developmental biology ,Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7] ,business.industry ,Neurosciences ,Case-control study ,Original Articles ,medicine.disease ,Attention Deficit Hyperactivity Disorder (ADHD) ,Brain Disorders ,Attention Deficit Disorder with Hyperactivity ,Sample size determination ,Pediatrics, Perinatology and Child Health ,Etiology ,business ,030217 neurology & neurosurgery - Abstract
The journal of child psychology and psychiatry 62(9), 1140-1149 (2021). doi:10.1111/jcpp.13384, Published by Wiley-Blackwell, Oxford
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225. Potential microemboli formation risk and its management during the heated saline-enhanced radiofrequency needle-tip catheter ablation.
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Suzuki A, Lehmann HI, Konishi H, Wang S, Hohmann S, Rettman ME, Newman LK, Parker KD, Curley MG, and Packer DL
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- Animals, Swine, Heart Ventricles diagnostic imaging, Embolism etiology, Embolism prevention & control, Disease Models, Animal, Microbubbles, Saline Solution, Echocardiography, Needles, Catheter Ablation methods, Catheter Ablation adverse effects, Catheter Ablation instrumentation
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Background: The potential risk of embolic events during ablation in the left ventricle (LV) with a heated saline-enhanced radiofrequency (SERF) needle-tip ablation catheter has not been characterized., Objective: This study aimed to investigate the formation of microemboli or other untoward events during SERF ablation., Methods: Ninety-three radiofrequency (RF) ablation procedures were performed in the LV of 14 pigs by using a SERF catheter (35 W, 70 seconds, and 60°C; normal or degassed saline [NS or DS] irrigation with a flow rate of 10 mL/min) vs a standard irrigated-tip radiofrequency (S-RF) catheter (30 or 50 W, 30 seconds, and 17 mL/min). Microbubble formation was graded on the basis of intracardiac echocardiography. Microbubbles, microembolic signals, and microparticles were monitored using our established model., Results: There was no significant difference in microbubble volume among SERF-NS, SERF-DS, and S-RF 30 W with "grade 1" intracardiac echocardiography microbubbles (median and 25th-75th percentiles 0.201 [0.011-3.13], 0.455 [0.06-2.66], and 0.004 μL [0.00-0.16 μL], respectively). There was no significant difference in microembolic signals among SERF-NS, SERF-DS, and S-RF 30 W with grade 1 bubbles (n = 8.0 ± 5.8, n = 7.6 ± 4.2, and n = 6.1 ± 6.1, respectively). Both SERF-NS and SERF-DS created larger lesions than did both S-RF 30 W and S-RF 50 W deliveries (mean 1241.5 ± 658.6, 1497.7 ± 893.4, 75.0 ± 24.8, and 184.0 ± 93.8 mm
3 ; P < .001). There was no significant difference in microparticle incidence among groups (P = .675). No evidence of embolic events was found in the brain and other organs at the histology assessment., Conclusion: In the setting of SERF ablation, significantly large LV lesions can be created without any increment in embolic microbubble or particle events. Grade 1 microbubble is related to the efficacy and safety., Competing Interests: Disclosures Dr Packer reported receiving grants from the National Institutes of Health (NIH)/National Heart, Lung, and Blood Institute, St. Jude Medical and St. Jude Memorial Foundation, Biosense Webster, Medtronic, and Boston Scientific during the conduct of the study and receiving grants from Abbott, Biosense Webster, Boston Scientific, CardioFocus, Medtronic, St. Jude Medical, CardioInsight, the NIH, Siemens, Thermedical, Endosense, Robertson Foundation, and Hansen Medical. He reported serving on the advisory board without compensation for Abbott, Biosense Webster, Boston Scientific, CardioFocus, Medtronic, St. Jude Medical, Spectrum Dynamics, Siemens, Thermedical, Johnson & Johnson, and SigNum Preemptive Healthcare; speaking with honorarium from Biotronik and MediaSphere Medical; and receiving royalties from Wiley, Oxford, and St. Jude Medical. Dr Packer and Mayo Clinic jointly have equity in a privately held company, External Beam Ablation Medical Devices (outside the submitted work). In addition, Dr Packer has mapping technologies with royalties paid. Dr Hohmann was funded by the Deutsche Forschungsgemeinschaft (DFG [German Research Foundation]; project no. 380200397). The other authors report no potential conflicts of interest., (Copyright © 2024 Heart Rhythm Society. Published by Elsevier Inc. All rights reserved.)- Published
- 2024
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226. Multimodal investigations of structural and functional brain alterations in anorexia and bulimia nervosa and their relationships to psychopathology.
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Yu X, Robinson L, Bobou M, Zhang Z, Banaschewski T, Barker GJ, Bokde ALW, Flor H, Grigis A, Garavan H, Gowland P, Heinz A, Brühl R, Martinot JL, Paillère Martinot ML, Artiges E, Nees F, Orfanos DP, Lemaître H, Poustka L, Hohmann S, Holz N, Bäuchl C, Smolka MN, Stringaris A, Walter H, Whelan R, Sinclair J, Schumann G, Schmidt U, and Desrivières S
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Background: Neurobiological understanding of eating disorders (EDs) is limited. This study presents the first comparative multi-modal magnetic resonance imaging (MRI) assessments of anorexia nervosa (AN) and bulimia nervosa (BN), uncovering neurobiological differences associated with these disorders., Methods: This female case-control study included 57 healthy controls (HC) and 130 participants with EDs (BN and AN subtypes). Structural and functional MRI assessed gray matter volume (GMV), cortical thickness (CT), and task-based activities related to reward processing, social-emotional functioning, and response inhibition. Whole-brain group differences were correlated to ED psychopathology., Results: Significant structural differences were observed in the ED group compared to HCs, including reduced GMV in the left lateral orbitofrontal cortex and lower CT in the left rostral middle frontal gyrus and precuneus, after adjusting for BMI. Specific structural alterations were only evident in AN subgroups. GMV reductions in the orbitofrontal cortex were linked to impulsivity, while lower CT in the frontal gyrus correlated with cognitive restraint in eating, suggesting these regions may play key roles in ED psychopathology. Functional MRI also revealed notable differences. During reward anticipation, participants with EDs exhibited deactivations in the cerebellum and right superior frontal gyrus, alongside reduced activation in the left lingual gyrus. These functional changes were associated with heightened neuroticism. Mediation analyses suggested that starvation-related GMV reductions in EDs disrupt reward-related brain function, increase neuroticism, and reinforce cognitive restraint, likely contributing to the persistence of ED symptoms., Conclusions: These findings illuminate key neurobehavioral mechanisms underlying EDs, pointing to potential brain-based targets for developing specialized treatment., (Copyright © 2024. Published by Elsevier Inc.)
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- 2024
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227. Gene-environment interactions in the influence of maternal education on adolescent neurodevelopment using ABCD study.
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Shi R, Chang X, Banaschewski T, Barker GJ, Bokde ALW, Desrivières S, Flor H, Grigis A, Garavan H, Gowland P, Heinz A, Brühl R, Martinot JL, Martinot MP, Artiges E, Nees F, Orfanos DP, Poustka L, Hohmann S, Holz N, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Lin X, and Feng J
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- Humans, Adolescent, Female, Male, Educational Status, Genome-Wide Association Study, Cognition physiology, Polymorphism, Single Nucleotide, Adolescent Development, Gene-Environment Interaction, Brain growth & development, Brain metabolism
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Maternal education was strongly correlated with adolescent brain morphology, cognitive performances, and mental health. However, the molecular basis for the effects of maternal education on the structural neurodevelopment remains unknown. Here, we conducted gene-environment-wide interaction study using the Adolescent Brain Cognitive Development cohort. Seven genomic loci with significant gene-environment interactions (G×E) on regional gray matter volumes were identified, with enriched biological functions related to metabolic process, inflammatory process, and synaptic plasticity. Additionally, genetic overlapping results with behavioral and disease-related phenotypes indicated shared biological mechanism between maternal education modified neurodevelopment and related behavioral traits. Finally, by decomposing the multidimensional components of maternal education, we found that socioeconomic status, rather than family environment, played a more important role in modifying the genetic effects on neurodevelopment. In summary, our study provided analytical evidence for G×E effects regarding adolescent neurodevelopment and explored potential biological mechanisms as well as social mechanisms through which maternal education could modify the genetic effects on regional brain development.
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- 2024
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228. Ruminative thinking mediates the effects of exposure to adverse life events on psychotic-like experiences.
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Fazio L, Raio A, Banaschewski T, Bokde ALW, Desrivières S, Flor H, Garavan H, Gowland P, Grigis A, Heinz A, Martinot JL, Paillère Martinot ML, Artiges E, Nees F, Papadopoulos Orfanos D, Paus T, Poustka L, Smolka MN, Hohmann S, Holz N, Vaidya N, Walter H, Whelan R, Schumann G, Bertolino A, Pergola G, and Antonucci LA
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Introduction: A growing literature has shown that exposure to adverse life events during childhood or adolescence is associated with the presence of psychotic-like experiences (PLEs), which is in turn associated with the risk of psychotic outcomes. Ruminative thinking, i.e., the tendency to dwell on particular issues or ideas, may affect the perceived aversiveness and ability to cope with adverse life events. However, the role that rumination plays in the relationship between adverse life events and the presence of PLEs remains unclear. The purpose of this study is to assess the association between adverse life events and PLEs in a longitudinal sample of young adults and adolescents, and to investigate whether this relationship is mediated by ruminative thinking., Methods: We used a longitudinal naturalistic sample of 706 volunteers assessed at ages 18 and 22 years, within the Imagen consortium. Lifetime occurrence of adverse life events (i.e., events perceived as strongly negative by participants) was investigated using the Life Events Questionnaire. The Community Assessment of Psychic Experience (CAPE-42) served to assess the presence of PLEs, while ruminative thinking was investigated through the Ruminative Response Scale., Results: Results showed that both frequency of PLEs and their persistence over time were associated with greater adverse life events exposure ( r = 0.32, p < 0.001 and F
1 = 9.8; p < 0.001, respectively) and greater ruminative response ( r = 0.66, p < 0.001 and F1 = 94.9; p < 0.001, respectively). Mediation analyses showed that relationship between adverse life events and PLEs frequency was partially mediated by rumination (direct effect Z: 5.4, p < 0.001; indirect effect Z: 6.9, p < 0.001; total effect Z: 5.9, p < 0.001). Considering changes between the two assessment timepoints, relationship between PLEs variation between 18 and 22 years and adverse life events occurred during the same period was partially mediated by changes in rumination (direct effect Z: 2.8, p < 0.005; indirect effect Z: 4.3, p < 0.001; total effect Z: 4.3; p < 0.001)., Discussion: Overall, our findings confirm that the presence of adverse life events may increase the risk of experiencing PLEs in healthy individuals and suggest that dysfunctional coping strategies, such as ruminative thinking, may be related to psychosis proneness. Results do not disentangle whether individuals with greater risk for psychosis tend to ruminate more or whether rumination exacerbates psychosis risk., Competing Interests: GP received lecture fees from Lundbeck and MEGIN. AB received consulting fees from Biogen and lecture fees from Otsuka, Janssen, and Lundbeck. TB served in an advisory or consultancy role for eye level, Infectopharm, Medice, Neurim Pharmaceuticals, Oberberg GmbH, and Takeda, received conference support or speaker's fee by Janssen, Medice, and Takeda, and received royalties from Hogrefe Kohlhammer CIP Medien Oxford University Press. LP served in an advisory or consultancy role for Roche and Viforpharm and received speaker's fee by Shire and received royalties from Hogrefe Kohlhammer and Schattauer. The present work is unrelated to the above grants and relationships. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision. The reviewer GS declared a shared affiliation, with no collaboration, with the authors AR, AB, GP, and LA to the handling editor at the time of the review., (Copyright © 2024 Fazio, Raio, Banaschewski, Bokde, Desrivières, Flor, Garavan, Gowland, Grigis, Heinz, Martinot, Paillère Martinot, Artiges, Nees, Papadopoulos Orfanos, Paus, Poustka, Smolka, Hohmann, Holz, Vaidya, Walter, Whelan, Schumann, Bertolino, Pergola, Antonucci and the IMAGEN Consortium.)- Published
- 2024
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229. Semi-automated reproducible target transfer for cardiac radioablation - A multi-center cross-validation study within the RAVENTA trial.
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Hohmann S, Xie J, Eckl M, Grehn M, Karfoul N, Janorschke C, Merten R, Rudic B, Buergy D, Lyan E, Krug D, Mehrhof F, Boldt LH, Corradini S, Fanslau H, Kaestner L, Zaman A, Giordano FA, Duncker D, Dunst J, Tilz RR, Schweikard A, Blanck O, and Boda-Heggemann J
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- Humans, Tachycardia, Ventricular radiotherapy, Tachycardia, Ventricular diagnostic imaging, Software, Tomography, X-Ray Computed, Imaging, Three-Dimensional, Male, Female, Reproducibility of Results, Radiotherapy Planning, Computer-Assisted methods, Radiosurgery methods
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Background: Stereotactic arrhythmia radioablation (STAR) is a therapeutic option for ventricular tachycardia (VT) where catheter-based ablation is not feasible or has previously failed. Target definition and its transfer from electro-anatomic maps (EAM) to radiotherapy treatment planning systems (TPS) is challenging and operator-dependent. Software solutions have been developed to register EAM with cardiac CT and semi-automatically transfer 2D target surface data into 3D CT volume coordinates. Results of a cross-validation study of two conceptually different software solutions using data from the RAVENTA trial (NCT03867747) are reported., Methods: Clinical Target Volumes (CTVs) were created from target regions delineated on EAM using two conceptually different approaches by separate investigators on data of 10 patients, blinded to each other's results. Targets were transferred using 3D-3D registration and 2D-3D registration, respectively. The resulting CTVs were compared in a core-lab using two complementary analysis software packages for structure similarity and geometric characteristics., Results: Volumes and surface areas of the CTVs created by both methods were comparable: 14.88 ± 11.72 ml versus 15.15 ± 11.35 ml and 44.29 ± 33.63 cm
2 versus 46.43 ± 35.13 cm2 . The Dice-coefficient was 0.84 ± 0.04; median surface-distance and Hausdorff-distance were 0.53 ± 0.37 mm and 6.91 ± 2.26 mm, respectively. The 3D-center-of-mass difference was 3.62 ± 0.99 mm. Geometrical volume similarity was 0.94 ± 0.05 %., Conclusion: The STAR targets transferred from EAM to TPS using both software solutions resulted in nearly identical 3D structures. Both solutions can be used for QA (quality assurance) and EAM-to-TPS transfer of STAR-targets. Semi-automated methods could potentially help to avoid mistargeting in STAR and offer standardized workflows for methodically harmonized treatments., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Author(s). Published by Elsevier B.V. All rights reserved.)- Published
- 2024
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230. Personality changes during adolescence predict young adult psychosis proneness and mediate gene-environment interplays of schizophrenia risk.
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Antonucci LA, Raio A, Kikidis GC, Bertolino A, Rampino A, Banaschewski T, Bokde ALW, Desrivières S, Flor H, Grigis A, Garavan H, Heinz A, Martinot JL, Paillère Martinot ML, Artiges E, Nees F, Papadopoulos Orfanos D, Poustka L, Hohmann S, Fröhner JH, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Hartman CA, and Pergola G
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Background: Psychotic symptoms in adolescence are associated with social adversity and genetic risk for schizophrenia. This gene-environment interplay may be mediated by personality, which also develops during adolescence. We hypothesized that (i) personality development predicts later Psychosis Proneness Signs (PPS), and (ii) personality traits mediate the association between genetic risk for schizophrenia, social adversities, and psychosis., Methods: A total of 784 individuals were selected within the IMAGEN cohort (Discovery Sample-DS: 526; Validation Sample-VS: 258); personality was assessed at baseline (13-15 years), follow-up-1 (FU1, 16-17 years), and FU2 (18-20 years). Latent growth curve models served to compute coefficients of individual change across 14 personality variables. A support vector machine algorithm employed these coefficients to predict PPS at FU3 (21-24 years). We computed mediation analyses, including personality-based predictions and self-reported bullying victimization as serial mediators along the pathway between polygenic risk score (PRS) for schizophrenia and FU3 PPS. We replicated the main findings also on 1132 adolescents recruited within the TRAILS cohort., Results: Growth scores in neuroticism and openness predicted PPS with 65.6% balanced accuracy in the DS, and 69.5% in the VS Mediations revealed a significant positive direct effect of PRS on PPS (confidence interval [CI] 0.01-0.15), and an indirect effect, serially mediated by personality-based predictions and victimization (CI 0.006-0.01), replicated in the TRAILS cohort (CI 0.0004-0.004)., Conclusions: Adolescent personality changes may predate future experiences associated with psychosis susceptibility. PPS personality-based predictions mediate the relationship between PRS and victimization toward adult PPS, suggesting that gene-environment correlations proposed for psychosis are partly mediated by personality.
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- 2024
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231. Population clustering of structural brain aging and its association with brain development.
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Duan H, Shi R, Kang J, Banaschewski T, Bokde ALW, Büchel C, Desrivières S, Flor H, Grigis A, Garavan H, Gowland PA, Heinz A, Brühl R, Martinot JL, Martinot MP, Artiges E, Nees F, Papadopoulos Orfanos D, Poustka L, Hohmann S, Nathalie Holz N, Fröhner J, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Lin X, and Feng J
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- Humans, Female, Male, Longitudinal Studies, Adolescent, Middle Aged, Cross-Sectional Studies, Aged, Neuroimaging, United Kingdom, Magnetic Resonance Imaging, Adult, Cluster Analysis, Brain growth & development, Brain diagnostic imaging, Aging physiology
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Structural brain aging has demonstrated strong inter-individual heterogeneity and mirroring patterns with brain development. However, due to the lack of large-scale longitudinal neuroimaging studies, most of the existing research focused on the cross-sectional changes of brain aging. In this investigation, we present a data-driven approach that incorporate both cross-sectional changes and longitudinal trajectories of structural brain aging and identified two brain aging patterns among 37,013 healthy participants from UK Biobank. Participants with accelerated brain aging also demonstrated accelerated biological aging, cognitive decline and increased genetic susceptibilities to major neuropsychiatric disorders. Further, by integrating longitudinal neuroimaging studies from a multi-center adolescent cohort, we validated the 'last in, first out' mirroring hypothesis and identified brain regions with manifested mirroring patterns between brain aging and brain development. Genomic analyses revealed risk loci and genes contributing to accelerated brain aging and delayed brain development, providing molecular basis for elucidating the biological mechanisms underlying brain aging and related disorders., Competing Interests: HD, RS, JK, AB, SD, HF, AG, HG, PG, AH, RB, JM, MM, EA, FN, DP, SH, NN, JF, MS, NV, HW, RW, GS, XL, JF No competing interests declared, TB Dr Banaschewski served in an advisory or consultancy role for eye level, Infectopharm, Lundbeck, Medice, Neurim Pharmaceuticals, Oberberg GmbH, Roche, and Takeda. He received conference support or speaker's fee by Janssen, Medice and Takeda. He received royalities from Hogrefe, Kohlhammer, CIP Medien, Oxford University Press; the presentwork is unrelated to these relationships, CB Reviewing editor, eLife, LP Dr Poustka served in an advisory or consultancy role for Roche and Viforpharm and received speaker's fee by Shire. She received royalties from Hogrefe, Kohlhammer and Schattauer. The present work is unrelated to the above grants and relationships, (© 2024, Duan et al.)
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- 2024
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232. Effect of a novel cannulation device for vascular access on AVF maturation in a goat carotid-jugular fistula model.
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Glowczwski A, Hohmann S, Ross J, Peden E, Gowda A, Lovelady A, Glowczwski J, Fridley J, and Simon BT
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Objective: The Ark is a 3-D printed titanium device designed to be implanted around the draining vein of an arteriovenous fistula (AVF) to facilitate vascular access. The purpose of this study was to assess AVF maturation after Ark implantation in a large animal model., Methodology: End-to-side AVFs were created between the carotid artery and jugular vein in nine pygmy goats that included three control (AVF only) and six experimental (AVF and Ark device) animals. For experimental animals, an Ark device was implanted approximately 10 cm downstream of the anastomosis at the time of AVF creation. Postoperative ultrasounds and cannulations of the jugular vein fistula were performed over 12 months. At the conclusion of the study, the AVF was ligated and Ark devices along with a segment of the arterialized vein and surrounding tissues were explanted for gross and histological assessment., Results: The control and experimental Ark groups exhibited increased dilation and flow as well as diminished depth underscoring the parallel developments in vascular attributes and AVF maturation between the two groups. Gross pathology, histology, and micro-CT imaging revealed intact endothelium, mature tissue integration throughout the porous Ark device, and no underlying stenosis. No adverse events such as foreign body reaction, skin or vessel erosion were identified., Conclusion: The study showed maturation without stenosis of the fistula in all animals. This study confirmed that the Ark device functions as a scaffold around the access vein, allows fistula maturation, and can be consistently cannulated without infiltrations over a 12-month period in a large animal model., Competing Interests: Declaration of conflicting interestsThe author(s) declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: The authors declare the following potential conflicts of interest regarding the publication of this article: Part of this research was funded by Voyager Biomedical; Inc. Dr. April Lovelady, Dr. Alan Glowczwski, and Justin Glowczwski are equity owners of Voyager Biomedical, Inc. Dr. Glowczwski serves as Voyager Biomedical’s Chief Medical Officer and is an Adjunct Professor for Texas A&M University’s College of Veterinary Medicine. Drs. John Ross, Eric Peden, and Stephen Hohhman are vascular surgeons and paid consultants for Voyager Biomedical, Inc. who performed the arteriovenous fistula creation surgeries.
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- 2024
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233. How social is social media for transgender and gender-diverse youth? Association of online social experiences with internalizing mental health problems.
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Herrmann L, Barkmann C, Bindt C, Hohmann S, Fahrenkrug S, and Becker-Hebly I
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- Humans, Adolescent, Male, Female, Child, COVID-19 psychology, COVID-19 epidemiology, Germany, Cyberbullying psychology, Gender Dysphoria psychology, Social Media, Transgender Persons psychology
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Adolescents spend a critical amount of their free time on the Internet and social media. Transgender and gender-diverse (TGD) adolescents, who report elevated rates of mental health issues, especially internalizing problems, have both positive and negative online social experiences (e.g., support and cyberbullying). This can have both beneficial and/or harmful effects on their mental health. Given the lack of research, the present study examined TGD adolescents' online (social) experiences and the association of positive and negative online social experiences with internalizing problems. The sample consisted of n = 165 TGD adolescents (11-18 years) diagnosed with gender dysphoria who attended a Gender Identity Service for children and adolescents (Hamburg GIS) in Germany between January 2020 and December 2022 during the COVID-19 pandemic. Positive (use of online support networks) and negative online social experiences (cyberbullying or other adverse online interactions) were assessed using study-specific items and internalizing problems using the Youth Self-Report. Frequencies of various online (social) experiences were analyzed, and a multiple linear regression analysis was performed to test their association with internalizing problems. In total, 42% of participants reported positive online social experiences (use of online support networks) and 51% of participants reported negative online social experiences (cyberbullying or other adverse online interactions). There was no significant association between negative online social experiences and internalizing problems but between positive online social experiences and more internalizing problems (adjusted R
2 = .01). TGD adolescents may seek online support, especially when struggling with mental health problems. Therefore, it is crucial to support youth navigating these online spaces more safely and positively and to empower them to buffer against potentially harmful experiences. Furthermore, strengthening offline relations with peers and family members is pivotal, given their importance for TGD adolescents' mental health., Competing Interests: Declarations Competing interests The authors declare that they have no competing interests. Ethical approval This study was performed in line with the principles of the Declaration of Helsinki. The local ethics committee granted ethical approval for the study. Consent to participate and consent to publish All participants gave their written consent to participate in the study and to the use and publication of their anonymized data., (© 2024. The Author(s).)- Published
- 2024
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234. Genetic-Dependent Brain Signatures of Resilience: Interactions among Childhood Abuse, Genetic Risks and Brain Function.
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Lu H, Rolls ET, Liu H, Stein DJ, Sahakian BJ, Elliott R, Jia T, Xie C, Xiang S, Wang N, Banaschewski T, Bokde ALW, Desrivières S, Flor H, Grigis A, Garavan H, Heinz A, Brühl R, Martinot JL, Martinot MP, Artiges E, Nees F, Orfanos DP, Lemaitre H, Poustka L, Hohmann S, Holz N, Fröhner JH, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Feng J, and Luo Q
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Resilience to emotional disorders is critical for adolescent mental health, especially following childhood abuse. Yet, brain signatures of resilience remain undetermined due to the differential susceptibility of the brain's emotion processing system to environmental stresses. Analyzing brain's responses to angry faces in a longitudinally large-scale adolescent cohort (IMAGEN), we identified two functional networks related to the orbitofrontal and occipital regions as candidate brain signatures of resilience. In girls, but not boys, higher activation in the orbitofrontal-related network was associated with fewer emotional symptoms following childhood abuse, but only when the polygenic burden for depression was high. This finding defined a genetic-dependent brain (GDB) signature of resilience. Notably, this GDB signature predicted subsequent emotional disorders in late adolescence, extending into early adulthood and generalizable to another independent prospective cohort (ABCD). Our findings underscore the genetic modulation of resilience-brain connections, laying the foundation for enhancing adolescent mental health through resilience promotion., Competing Interests: Declaration of interest Dr Banaschewski served in an advisory or consultancy role for eye level, Infectopharm, Lundbeck, Medice, Neurim Pharmaceuticals, Oberberg GmbH, Roche, and Takeda. He received conference support or speaker’s fee by Janssen, Medice and Takeda. He received royalities from Hogrefe, Kohlhammer, CIP Medien, Oxford University Press; the present work is unrelated to these relationships. Dr Poustka served in an advisory or consultancy role for Roche and Viforpharm and received speaker’s fee by Shire. She received royalties from Hogrefe, Kohlhammer and Schattauer. The present work is unrelated to the above grants and relationships. The other authors report no biomedical financial interests or potential conflicts of interest.
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- 2024
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235. Implementing stereotactic arrhythmia radioablation with STOPSTORM.eu consortium support: intermediate results of a prospective Israeli single-institutional trial.
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Borzov E, Efraim R, Suleiman M, Bar-Deroma R, Billan S, Xie J, Hohmann S, Blanck O, and Charas T
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Background: Ventricular tachycardia (VT) is a life-threatening arrhythmia originating from the heart's ventricles. Traditional treatments include antiarrhythmic medications, implantable cardioverter-defibrillators (ICDs), and catheter ablation. Stereotactic body radiation therapy (SBRT) targeting the arrhythmogenic focus in the left ventricle-stereotactic arrhythmia radioablation (STAR)-is an emerging treatment and may offer a potential solution for patients with refractory VT., Objective: We designed an interventional prospective clinical trial in Israel aligned with the STOPSTORM.eu consortium's benchmarks, recommendations, and directives to assess the safety and efficacy of STAR in patients with refractory VT., Methods: Our phase I/II single-institutional trial was approved by the Ministry of Health of Israel for 10 patients, initially assessing safety in the first 3 patients. We included patients with ICDs experiencing symptomatic monomorphic VT after an inadequate response to previous therapies. The primary endpoints were treatment-related serious adverse events and a reduction in VT burden as assessed by ICD interrogation. Secondary outcomes included a reduction in antiarrhythmic medications and changes in quality of life., Results: From August 2023 to August 2024, 3 patients underwent STAR treatment. The prescription dose was a single fraction of 25 Gy. Planning target volumes were 47.8, 49.7, and 91.8 cc, and treatment was successfully delivered with no grade 3 or higher adverse events reported. Over a follow-up period of 12 months for the first patient and 8 months for the second one, no VT events were recorded after treatment. The third patient died from progressive heart failure 3 months after treatment. Left ventricular ejection fraction remained stable, and no significant radiation-induced inflammatory changes were noted., Conclusion: The initial results of this trial suggest that STAR can reduce VT episodes in patients with refractory VT without severe adverse effects. The study highlights the importance of international collaboration and standardization in pioneering new treatments. Further follow-up and additional patient data will be necessary to confirm these findings and evaluate long-term outcomes, including potential adjustments to antiarrhythmic medication regimens., (© 2024. The Author(s).)
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- 2024
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236. Regional patterns of human cortex development correlate with underlying neurobiology.
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Lotter LD, Saberi A, Hansen JY, Misic B, Paquola C, Barker GJ, Bokde ALW, Desrivières S, Flor H, Grigis A, Garavan H, Gowland P, Heinz A, Brühl R, Martinot JL, Paillère ML, Artiges E, Papadopoulos Orfanos D, Paus T, Poustka L, Hohmann S, Fröhner JH, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Nees F, Banaschewski T, Eickhoff SB, and Dukart J
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- Humans, Adolescent, Female, Adult, Male, Child, Young Adult, Aging physiology, Middle Aged, Magnetic Resonance Imaging, Child, Preschool, Aged, Neurobiology, Neurons metabolism, Neuroimaging, Cerebral Cortex growth & development, Cerebral Cortex metabolism, Cerebral Cortex diagnostic imaging
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Human brain morphology undergoes complex changes over the lifespan. Despite recent progress in tracking brain development via normative models, current knowledge of underlying biological mechanisms is highly limited. We demonstrate that human cortical thickness development and aging trajectories unfold along patterns of molecular and cellular brain organization, traceable from population-level to individual developmental trajectories. During childhood and adolescence, cortex-wide spatial distributions of dopaminergic receptors, inhibitory neurons, glial cell populations, and brain-metabolic features explain up to 50% of the variance associated with a lifespan model of regional cortical thickness trajectories. In contrast, modeled cortical thickness change patterns during adulthood are best explained by cholinergic and glutamatergic neurotransmitter receptor and transporter distributions. These relationships are supported by developmental gene expression trajectories and translate to individual longitudinal data from over 8000 adolescents, explaining up to 59% of developmental change at cohort- and 18% at single-subject level. Integrating neurobiological brain atlases with normative modeling and population neuroimaging provides a biologically meaningful path to understand brain development and aging in living humans., (© 2024. The Author(s).)
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- 2024
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237. Variation in moment-to-moment brain state engagement changes across development and contributes to individual differences in executive function.
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Ye J, Tejavibulya L, Dai W, Cope LM, Hardee JE, Heitzeg MM, Lichenstein S, Yip SW, Banaschewski T, Baker GJ, Bokde ALW, Brühl R, Desrivières S, Flor H, Gowland P, Grigis A, Heinz A, Martinot JL, Paillère Martinot ML, Artiges E, Nees F, Orfanos DP, Poustka L, Hohmann S, Holz N, Baeuchl C, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Garavan H, Chaarani B, Gee DG, Baskin-Sommers A, Casey BJ, and Scheinost D
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Neural variability, or variation in brain signals, facilitates dynamic brain responses to ongoing demands. This flexibility is important during development from childhood to young adulthood, a period characterized by rapid changes in experience. However, little is known about how variability in the engagement of recurring brain states changes during development. Such investigations would require the continuous assessment of multiple brain states concurrently. Here, we leverage a new computational framework to study state engagement variability (SEV) during development. A consistent pattern of SEV changing with age was identified across cross-sectional and longitudinal datasets (N>3000). SEV developmental trajectories stabilize around mid-adolescence, with timing varying by sex and brain state. SEV successfully predicts executive function (EF) in youths from an independent dataset. Worse EF is further linked to alterations in SEV development. These converging findings suggest SEV changes over development, allowing individuals to flexibly recruit various brain states to meet evolving needs.
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- 2024
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238. Distinct personality profiles associated with disease risk and diagnostic status in eating disorders.
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Zhang Z, Robinson L, Campbell I, Irish M, Bobou M, Winterer J, Zhang Y, King S, Vaidya N, Broulidakis MJ, van Noort BM, Stringaris A, Banaschewski T, Bokde ALW, Brühl R, Fröhner JH, Grigis A, Garavan H, Gowland P, Heinz A, Hohmann S, Martinot JL, Martinot MP, Nees F, Orfanos DP, Paus T, Poustka L, Sinclair J, Smolka MN, Walter H, Whelan R, Schumann G, Schmidt U, and Desrivières S
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- Humans, Female, Young Adult, Adolescent, Male, Longitudinal Studies, Feeding and Eating Disorders psychology, Feeding and Eating Disorders epidemiology, Feeding and Eating Disorders diagnosis, Bulimia Nervosa psychology, Bulimia Nervosa epidemiology, Adult, Impulsive Behavior, Risk Factors, Anxiety psychology, Anxiety epidemiology, Anxiety diagnosis, Comorbidity, Anxiety Disorders psychology, Anxiety Disorders epidemiology, Anxiety Disorders diagnosis, Personality, Anorexia Nervosa psychology, Anorexia Nervosa epidemiology, Neuroticism
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Background: Personality traits have been associated with eating disorders (EDs) and comorbidities. However, it is unclear which personality profiles are premorbid risk rather than diagnostic markers., Methods: We explored associations between personality and ED-related mental health symptoms using canonical correlation analyses. We investigated personality risk profiles in a longitudinal sample, associating personality at age 14 with onset of mental health symptoms at ages 16 or 19. Diagnostic markers were identified in a sample of young adults with anorexia nervosa (AN, n = 58) or bulimia nervosa (BN, n = 63) and healthy controls (n = 47)., Results: Two significant premorbid risk profiles were identified, successively explaining 7.93 % and 5.60 % of shared variance (R
c 2 ). The first combined neuroticism (canonical loading, rs = 0.68), openness (rs = 0.32), impulsivity (rs = 0.29), and conscientiousness (rs = 0.27), with future onset of anxiety symptoms (rs = 0.87) and dieting (rs = 0.58). The other, combined lower agreeableness (rs = -0.60) and lower anxiety sensitivity (rs = -0.47), with future deliberate self-harm (rs = 0.76) and purging (rs = 0.55). Personality profiles associated with "core psychopathology" in both AN (Rc 2 = 80.56 %) and BN diagnoses (Rc 2 = 64.38 %) comprised hopelessness (rs = 0.95, 0.87) and neuroticism (rs = 0.93, 0.94). For BN, this profile also included impulsivity (rs = 0.60). Additionally, extraversion (rs = 0.41) was associated with lower depressive risk in BN., Limitations: The samples were not ethnically diverse. The clinical cohort included only females. There was non-random attrition in the longitudinal sample., Conclusions: The results suggest neuroticism and impulsivity as risk and diagnostic markers for EDs, with neuroticism and hopelessness as shared diagnostic markers. They may inform the design of more personalised prevention and intervention strategies., Competing Interests: Declaration of competing interest Dr. Banaschewski served in an advisory or consultancy role for ADHS digital, Infectopharm, Lundbeck, Medice, Neurim Pharmaceuticals, Oberberg GmbH, Roche, and Takeda. He received conference support or speaker's fee by Medice and Takeda. He received royalties from Hogrefe, Kohlhammer, CIP Medien, Oxford University Press. Dr. Poustka served in an advisory or consultancy role for Roche and Viforpharm and received speaker's fee by Shire. She received royalties from Hogrefe, Kohlhammer and Schattauer. The present work is unrelated to these relationships. The other authors report no biomedical financial interests or potential conflicts of interest., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)- Published
- 2024
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239. [Ethical Considerations of Including Minors in Clinical Trials Using the Example of the Indicated Prevention of Psychotic Disorders].
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Schultze-Lutter F, Banaschewski T, Barth GM, Bechdolf A, Bender S, Flechtner HH, Hackler S, Heuer F, Hohmann S, Holzner L, Huss M, Koutsouleris N, Lipp M, Mandl S, Meisenzahl E, Munz M, Osman N, Peschl J, Reissner V, Renner T, Riedel A, Romanos M, Romer G, Schomerus G, Thiemann U, Uhlhaas PJ, Woopen C, Correll CU, and Care-Konsortium D
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- Humans, Child, Adolescent, Minors psychology, Germany, Personal Autonomy, Patient Selection ethics, Early Diagnosis, Vulnerable Populations psychology, Social Stigma, Risk Assessment, Psychotic Disorders diagnosis, Psychotic Disorders psychology, Psychotic Disorders prevention & control, Clinical Trials as Topic ethics
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Ethical Considerations of Including Minors in Clinical Trials Using the Example of the Indicated Prevention of Psychotic Disorders Abstract: As a vulnerable group, minors require special protection in studies. For this reason, researchers are often reluctant to initiate studies, and ethics committees are reluctant to authorize such studies. This often excludes minors from participating in clinical studies. This exclusion can lead to researchers and clinicians receiving only incomplete data or having to rely on adult-based findings in the treatment of minors. Using the example of the study "Computer-Assisted Risk Evaluation in the Early Detection of Psychotic Disorders" (CARE), which was conducted as an 'other clinical investigation' according to the Medical Device Regulation, we present a line of argumentation for the inclusion of minors which weighs the ethical principles of nonmaleficence (especially regarding possible stigmatization), beneficence, autonomy, and fairness. We show the necessity of including minors based on the development-specific differences in diagnostics and early intervention. Further, we present specific protective measures. This argumentation can also be transferred to other disorders with the onset in childhood and adolescence and thus help to avoid excluding minors from appropriate evidence-based care because of insufficient studies.
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- 2024
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240. Randomized controlled trial of individualized arousal-biofeedback for children and adolescents with disruptive behavior disorders (DBD).
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Aggensteiner PM, Böttinger B, Baumeister S, Hohmann S, Heintz S, Kaiser A, Häge A, Werhahn J, Hofstetter C, Walitza S, Franke B, Buitelaar J, Banaschewski T, Brandeis D, and Holz NE
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- Humans, Child, Adolescent, Male, Female, Galvanic Skin Response physiology, Treatment Outcome, Cognitive Behavioral Therapy methods, Conduct Disorder therapy, Conduct Disorder psychology, Attention Deficit and Disruptive Behavior Disorders therapy, Arousal physiology, Aggression psychology, Biofeedback, Psychology methods
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Disruptive behavior disorders [including conduct disorder (CD) and oppositional defiant disorder (ODD)] are common childhood and adolescent psychiatric conditions often linked to altered arousal. The recommended first-line treatment is multi-modal therapy and includes psychosocial and behavioral interventions. Their modest effect sizes along with clinically and biologically heterogeneous phenotypes emphasize the need for innovative personalized treatment targeting impaired functions such as arousal dysregulation. A total of 37 children aged 8-14 years diagnosed with ODD/CD were randomized to 20 sessions of individualized arousal biofeedback using skin conductance levels (SCL-BF) or active treatment as usual (TAU) including psychoeducation and cognitive-behavioral elements. The primary outcome was the change in parents´ ratings of aggressive behavior measured by the Modified Overt Aggression Scale. Secondary outcome measures were subscales from the Child Behavior Checklist, the Inventory of Callous-Unemotional traits, and the Reactive-Proactive Aggression Questionnaire. The SCL-BF treatment was neither superior nor inferior to the active TAU. Both groups showed reduced aggression after treatment with small effects for the primary outcome and large effects for some secondary outcomes. Importantly, successful learning of SCL self-regulation was related to reduced aggression at post-assessment. Individualized SCL-BF was not inferior to active TAU for any treatment outcome with improvements in aggression. Further, participants were on average able to self-regulate their SCL, and those who best learned self-regulation showed the highest clinical improvement, pointing to specificity of SCL-BF regulation for improving aggression. Further studies with larger samples and improved methods, for example by developing BF for mobile use in ecologically more valid settings are warranted., (© 2024. The Author(s).)
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- 2024
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241. Reasons for gender inequities in invasive electrophysiology: a survey on family issues and career paths of female and male electrophysiology fellows in Germany.
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Mueller-Leisse J, Hillmann HAK, Eiringhaus J, Angelini E, Karfoul N, Hohmann S, and Duncker D
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Aims: Female physicians are underrepresented in invasive electrophysiology (EP) for multiple reasons. Despite an increasing focus on the topic, it is unclear what aspects are predominant., Methods and Results: We conducted a survey on career paths of current or former EP fellows in Germany to elucidate how gender and family affected their careers. 231 fellows (24.2% female) were invited. 110 participants completed the survey (30.9% female, mean age 41.0 ± 5.0 years, and 79.1% with children). Female and male participants with children reported similar career goals and achievements before parenthood, but afterwards women changed their career paths more often. Major reasons were personal priorities followed by lack of flexibility at work and at home. Women covered the majority of childcare. At the time of the survey, 80.0% of women and 96.4% of men with a former career goal of invasive EP were active in invasive EP. Independent of age, women were in lower-level positions, had accomplished fewer professional achievements, were less satisfied with their work and had fewer children. 56.5% of women did not feel supported by their employers regarding family issues. 82.6% reported there was no satisfactory day care. 69.6% were unable to continue to follow their career during pregnancy, mostly due to restrictions by employers (75.0%). Dedicated policies for pregnant workers or support programmes were scarce., Conclusion: Beside the distribution of childcare at home, lack of flexibility and support by employers as well as working and fluoroscopy restrictions during pregnancy hamper women in EP and should be addressed., Competing Interests: Conflict of interest: J.M.-L. received lecture honorary, travel grants and/or a fellowship grant from Abbott, Biotronik, Boston Scientific, Medtronic and Zoll, outside the submitted work. H.A.K.H. received lecture honorary and/or a fellowship grant from AstraZeneca, Boston Scientific and Zoll, outside the submitted work. J.E. received a fellowship grant from Biotronik outside the submitted work. E.A. has no conflicts to declare. N.K. received lecture honorary from Abbott outside the submitted work. S.H. received a fellowship grant from Boston Scientific and lecture honorary from Abbott and Medtronic, outside the submitted work. D.D. received lecture honorary, travel grants and/or a fellowship grant from Abbott, Astra Zeneca, Bayer, Biotronik, Boehringer Ingelheim, Boston Scientific, Bristol Myers Squibb, Medtronic, Microport, Pfizer, Sanofi and Zoll, outside the submitted work., (© The Author(s) 2024. Published by Oxford University Press on behalf of the European Society of Cardiology.)
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- 2024
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242. Synthesis and biological profile of substituted hexahydrofuro[3,4-b]furans, a novel class of bicyclic acyl-acyl carrier protein (ACP) thioesterase inhibitors.
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Ahrens H, Barber DM, Bojack G, Bollenbach-Wahl B, Churchman L, Getachew R, Helmke H, Hohmann S, Laber B, Lange G, Rees S, Reingruber AM, Schmutzler D, and Frackenpohl J
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Background: Weed control is a significant challenge for farmers around the globe. Of the various methods available for combatting weeds, small molecules remain the most effective and versatile technology to date. In the search for novel chemical entities with new modes of action toward herbicide-resistant weeds, we have investigated hexahydrofuro[3,4-b]furan-based acyl-acyl carrier protein (ACP) thioesterase inhibitors inspired by X-ray co-crystal structure-based modeling studies., Results: By exploiting scaffold hopping concepts and molecular modeling studies we were able to identify new hexahydrofuro[3,4-b]furan-based lead structures showing promising activity in vivo against commercially important grass weeds in line with strong target affinity., Conclusion: The present work covers a series of novel herbicidal lead structures that possess a hexahydrofuro[3,4-b]furan scaffold as a structural key feature, carrying ortho-substituted aryloxy side chains. Based on an optimized synthetic approach a broad structure-activity relationship (SAR) study was carried out. The new compounds emerging from our modeling-inspired structural variations show good acyl-ACP thioesterase inhibition in line with promising initial herbicidal activity. Glasshouse trials showed that the hexahydrofuro[3,4-b]furans outlined herein display good control of cold and warm season grass-weed species in pre-emergence application. Remarkably, some of the novel acyl-ACP thioesterase-inhibitors also showed promising efficacy against warm season weeds that are difficult to control. © 2024 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry., (© 2024 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.)
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- 2024
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243. Personality, Social Factors, Brain Functioning, Familial Risk, and Trajectories of Alcohol Misuse in Adolescence.
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Tschorn M, Daedelow L, Szalek L, Banaschewski T, Bokde ALW, Desrivières S, Flor H, Grigis A, Garavan H, Gowland P, Martinot JL, Martinot MP, Artiges E, Nees F, Orfanos DP, Poustka L, Hohmann S, Buechl C, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Heinz A, and Rapp MA
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- Humans, Adolescent, Male, Female, Longitudinal Studies, Risk Factors, Brain diagnostic imaging, Young Adult, Underage Drinking statistics & numerical data, Underage Drinking psychology, Adolescent Behavior psychology, Risk-Taking, Europe epidemiology, Alcoholism epidemiology, Alcoholism psychology, Personality
- Abstract
Importance: The development of an alcohol use disorder in adolescence is associated with increased risk of future alcohol dependence. The differential associations of risk factors with alcohol use over the course of 8 years are important for preventive measures., Objective: To determine the differential associations of risk-taking aspects of personality, social factors, brain functioning, and familial risk with hazardous alcohol use in adolescents over the course of 8 years., Design, Setting, and Participants: The IMAGEN multicenter longitudinal cohort study included adolescents recruited from European schools in Germany, the UK, France, and Ireland from January 2008 to January 2019. Eligible participants included those with available neuropsychological, self-report, imaging, and genetic data at baseline. Adolescents who were ineligible for magnetic resonance imaging or had serious medical conditions were excluded. Data analysis was conducted from July 2021 to September 2022., Exposure: Personality testing, psychosocial factors, brain functioning, and familial risk of alcohol misuse., Main Outcome and Measures: Hazardous alcohol use as measured with the Alcohol Use Disorders Identification Test scores, a main planned outcome of the IMAGEN study. Alcohol misuse trajectories at ages 14, 16, 19, and 22 years were modeled using latent growth curve models., Results: A total of 2240 adolescents (1110 female [49.6%] and 1130 male [50.4%]) were included in the study. There was a significant negative association of psychosocial resources (β = -0.29; SE = 0.03; P < .001) with the general risk of alcohol misuse as well as a significant positive association of the risk-taking aspects of personality with the intercept (β = 0.19; SE = 0.04; P < .001). Furthermore, there were significant positive associations of the social domain (β = 0.13; SE = 0.02; P < .001) and the personality domain (β = 0.07; SE = 0.02; P < .001) with trajectories of alcohol misuse development over time (slope). Family history of substance misuse was negatively associated with general risk of alcohol misuse (β = -0.04; SE = 0.02; P = .045) and its development over time (β = -0.03; SE = 0.01; P = .01). Brain functioning showed no significant association with intercept or slope of alcohol misuse in the model., Conclusions and Relevance: The findings of this cohort study suggest known risk factors of adolescent drinking may contribute differentially to future alcohol misuse. This approach may inform more individualized preventive interventions.
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- 2024
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244. Investigating grey matter volumetric trajectories through the lifespan at the individual level.
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Shi R, Xiang S, Jia T, Robbins TW, Kang J, Banaschewski T, Barker GJ, Bokde ALW, Desrivières S, Flor H, Grigis A, Garavan H, Gowland P, Heinz A, Brühl R, Martinot JL, Martinot MP, Artiges E, Nees F, Orfanos DP, Paus T, Poustka L, Hohmann S, Millenet S, Fröhner JH, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Lin X, Sahakian BJ, and Feng J
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- Humans, Adolescent, Female, Male, Young Adult, Brain diagnostic imaging, Brain growth & development, Adult, Longitudinal Studies, Organ Size, Neuroimaging, Cognition physiology, Longevity, Middle Aged, United Kingdom, Gray Matter diagnostic imaging, Magnetic Resonance Imaging
- Abstract
Adolescents exhibit remarkable heterogeneity in the structural architecture of brain development. However, due to limited large-scale longitudinal neuroimaging studies, existing research has largely focused on population averages, and the neurobiological basis underlying individual heterogeneity remains poorly understood. Here we identify, using the IMAGEN adolescent cohort followed up over 9 years (14-23 y), three groups of adolescents characterized by distinct developmental patterns of whole-brain gray matter volume (GMV). Group 1 show continuously decreasing GMV associated with higher neurocognitive performances than the other two groups during adolescence. Group 2 exhibit a slower rate of GMV decrease and lower neurocognitive performances compared with Group 1, which was associated with epigenetic differences and greater environmental burden. Group 3 show increasing GMV and lower baseline neurocognitive performances due to a genetic variation. Using the UK Biobank, we show these differences may be attenuated in mid-to-late adulthood. Our study reveals clusters of adolescent neurodevelopment based on GMV and the potential long-term impact., (© 2024. The Author(s).)
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- 2024
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245. Coupled changes between ruminating thoughts and resting-state brain networks during the transition into adulthood.
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Marchitelli R, Paillère Martinot ML, Trouvé A, Banaschewski T, Bokde ALW, Desrivières S, Flor H, Garavan H, Gowland P, Heinz A, Brühl R, Nees F, Papadopoulos Orfanos D, Paus T, Poustka L, Hohmann S, Holz N, Vaidya N, Fröhner JH, Smolka MN, Walter H, Whelan R, Schumann G, Martinot JL, and Artiges E
- Abstract
Perseverative negative thoughts, known as rumination, might arise from emotional challenges and preclude mental health when transitioning into adulthood. Due to its multifaceted nature, rumination can take several ruminative response styles, that diverge in manifestations, severity, and mental health outcomes. Still, prospective ruminative phenotypes remain elusive insofar. Longitudinal study designs are ideal for stratifying ruminative response styles, especially with resting-state functional MRI whose setup naturally elicits people's ruminative traits. Here, we considered self-rated questionnaires on rumination and psychopathology, along with resting-state functional MRI data in 595 individuals assessed at age 18 and 22 from the IMAGEN cohort. We conducted independent component analysis to characterize eight single static resting-state functional networks in each subject and session and furthermore conducted a dynamic analysis, tackling the time variations of functional networks during the entire scanning time. We then investigated their longitudinal mediation role between changes in three ruminative response styles (reflective pondering, brooding, and depressive rumination) and changes in internalizing and co-morbid externalizing symptoms. Four static and two dynamic networks longitudinally differentiated these ruminative styles and showed complemental sensitivity to internalizing and co-morbid externalizing symptoms. Among these networks, the right frontoparietal network covaried with all ruminative styles but did not play any mediation role towards psychopathology. The default mode, the salience, and the limbic networks prospectively stratified these ruminative styles, suggesting that maladaptive ruminative styles are associated with altered corticolimbic function. For static measures, only the salience network played a longitudinal causal role between brooding rumination and internalizing symptoms. Dynamic measures highlighted the default-mode mediation role between the other ruminative styles and co-morbid externalizing symptoms. In conclusion, we identified the ruminative styles' psychometric and neural outcome specificities, supporting their translation into applied research on young adult mental healthcare., (© 2024. The Author(s), under exclusive licence to Springer Nature Limited.)
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- 2024
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246. Light Cannabis Use and the Adolescent Brain: An 8-years Longitudinal Assessment of Mental Health, Cognition, and Reward Processing.
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Macedo I, Paiva TO, Pasion R, Daedelow L, Heinz A, Magalhães A, Banaschewski T, Bokde ALW, Desrivières S, Flor H, Grigis A, Garavan H, Gowland P, Brühl R, Martinot JL, Martinot MP, Artiges E, Nees F, Orfanos DP, Paus T, Poustka L, Hohmann S, Holz N, Fröhner JH, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, and Barbosa F
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- Humans, Male, Longitudinal Studies, Adolescent, Young Adult, Female, Mental Health, Marijuana Use psychology, Marijuana Use epidemiology, Marijuana Abuse psychology, Magnetic Resonance Imaging, Reward, Cognition drug effects, Cognition physiology, Brain drug effects
- Abstract
Rationale: For decades, cannabis has been the most widely used illicit substance in the world, particularly among youth. Research suggests that mental health problems associated with cannabis use may result from its effect on reward brain circuit, emotional processes, and cognition. However, findings are mostly derived from correlational studies and inconsistent, particularly in adolescents., Objectives and Methods: Using data from the IMAGEN study, participants (non-users, persistent users, abstinent users) were classified according to their cannabis use at 19 and 22 years-old. All participants were cannabis-naïve at baseline (14 years-old). Psychopathological symptoms, cognitive performance, and brain activity while performing a Monetary Incentive Delay task were used as predictors of substance use and to analyze group differences over time., Results: Higher scores on conduct problems and lower on peer problems at 14 years-old (n = 318) predicted a greater likelihood of transitioning to cannabis use within 5 years. At 19 years of age, individuals who consistently engaged in low-frequency (i.e., light) cannabis use (n = 57) exhibited greater conduct problems and hyperactivity/inattention symptoms compared to non-users (n = 52) but did not differ in emotional symptoms, cognitive functioning, or brain activity during the MID task. At 22 years, those who used cannabis at both 19 and 22 years-old n = 17), but not individuals that had been abstinent for ≥ 1 month (n = 19), reported higher conduct problems than non-users (n = 17)., Conclusions: Impairments in reward-related brain activity and cognitive functioning do not appear to precede or succeed cannabis use (i.e., weekly, or monthly use). Cannabis-naïve adolescents with conduct problems and more socially engaged with their peers may be at a greater risk for lighter yet persistent cannabis use in the future., (© 2024. The Author(s).)
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- 2024
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247. Adolescent maturation of cortical excitation-inhibition balance based on individualized biophysical network modeling.
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Saberi A, Wischnewski KJ, Jung K, Lotter LD, Schaare HL, Banaschewski T, Barker GJ, Bokde ALW, Desrivières S, Flor H, Grigis A, Garavan H, Gowland P, Heinz A, Brühl R, Martinot JL, Martinot MP, Artiges E, Nees F, Orfanos DP, Lemaitre H, Poustka L, Hohmann S, Holz N, Baeuchl C, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Paus T, Dukart J, Bernhardt BC, Popovych OV, Eickhoff SB, and Valk SL
- Abstract
The balance of excitation and inhibition is a key functional property of cortical microcircuits which changes through the lifespan. Adolescence is considered a crucial period for the maturation of excitation-inhibition balance. This has been primarily observed in animal studies, yet human in vivo evidence on adolescent maturation of the excitation-inhibition balance at the individual level is limited. Here, we developed an individualized in vivo marker of regional excitation-inhibition balance in human adolescents, estimated using large-scale simulations of biophysical network models fitted to resting-state functional magnetic resonance imaging data from two independent cross-sectional (N = 752) and longitudinal (N = 149) cohorts. We found a widespread relative increase of inhibition in association cortices paralleled by a relative age-related increase of excitation, or lack of change, in sensorimotor areas across both datasets. This developmental pattern co-aligned with multiscale markers of sensorimotor-association differentiation. The spatial pattern of excitation-inhibition development in adolescence was robust to inter-individual variability of structural connectomes and modeling configurations. Notably, we found that alternative simulation-based markers of excitation-inhibition balance show a variable sensitivity to maturational change. Taken together, our study highlights an increase of inhibition during adolescence in association areas using cross sectional and longitudinal data, and provides a robust computational framework to estimate microcircuit maturation in vivo at the individual level., Competing Interests: Disclosures Dr Banaschewski served in an advisory or consultancy role for eye level, Infectopharm, Medice, Neurim Pharmaceuticals, Oberberg GmbH and Takeda. He received conference support or speaker’s fee by Janssen, Medice and Takeda. He received royalties from Hogrefe, Kohlhammer, CIP Medien, Oxford University Press. The present work is unrelated to the above grants and relationships. Dr Barker has received honoraria from General Electric Healthcare for teaching on scanner programming courses. Dr Poustka served in an advisory or consultancy role for Roche and Viforpharm and received speaker’s fees from Shire. She received royalties from Hogrefe, Kohlhammer and Schattauer. The present work is unrelated to the above grants and relationships. The other authors report no biomedical financial interests or potential conflicts of interest.
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- 2024
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248. Ruminant model for hemodialysis cannulation.
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Lovelady A, Glowczwski A, Glowczwski J, Azimuddin A, Ross J, Hohmann S, Fridley J, and Simon BT
- Abstract
Background: Preventative strategies that minimize hemodialysis access complications remain limited., Objective: This study aimed to address this gap by developing a Caprine cannulation model to investigate the impact of repeated cannulations on vascular access patency rates., Research Design and Measures: In this pilot study, a meta-analysis was conducted using experimental control data from four trials to explore the impact of Caprine breed (independent variable) on the dependent variables that affect hemodialysis cannulation, including AVF growth, AVF depth, and flow rate., Subjects: Arteriovenous Fistulas (AVFs) were created using the carotid artery and jugular vein in the necks of seven goats from the French alpine, dwarf, and pygmy breeds. All seven AVFs exhibited vessel remodeling patterns similar to that observed in humans and remained patent, enabling hemodialysis access over the 6 month study., Results: Over the course of 18 weeks, a total of 291 cannulations were completed using standard 15 g dialysis needles without complications demonstrating the feasibility of using the Caprine species as a cannulation model. The ease of access coupled with the animals' cooperative behavior further contributes to the suitability of the Caprine species for hemodialysis investigations. Notably, no infections or clinically significant incidents were observed throughout the study., Conclusions: The stability of AVF patency and flow underscores the viability and potential of the Caprine species animal model as a valuable research platform for exploring interventions aimed at improving vascular access survival in hemodialysis patients., Competing Interests: Declaration of conflicting interestsThe author(s) declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article: Part of this research was funded by Voyager Biomedical, Inc. Dr. April Lovelady, Dr. Alan Glowczwski, and Justin Glowczwski are equity owners of Voyager Biomedical, Inc. Dr. Glowczwski serves as Voyager Biomedical’s Chief Medical Officer and is an Adjunct Professor for Texas A&M University’s College of Veterinary Medicine. Drs. John Ross and Stephen Hohhman are vascular surgeons and paid consultants for Voyager Biomedical, Inc. who performed the arteriovenous fistula creation surgeries.
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- 2024
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249. The genetic architecture of the human hypothalamus and its involvement in neuropsychiatric behaviours and disorders.
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Chen SD, You J, Zhang W, Wu BS, Ge YJ, Xiang ST, Du J, Kuo K, Banaschewski T, Barker GJ, Bokde ALW, Desrivières S, Flor H, Grigis A, Garavan H, Gowland P, Heinz A, Brühl R, Martinot JL, Martinot MP, Artiges E, Nees F, Orfanos DP, Lemaitre H, Paus T, Poustka L, Hohmann S, Millenet S, Baeuchl C, Smolka MN, Vaidya N, Walter H, Whelan R, Schumann G, Feng JF, Dong Q, Cheng W, and Yu JT
- Subjects
- Humans, Male, Female, Adult, Mental Disorders genetics, ADAMTS Proteins genetics, Middle Aged, Mendelian Randomization Analysis, Genome-Wide Association Study, Hypothalamus metabolism, Hypothalamus diagnostic imaging
- Abstract
Despite its crucial role in the regulation of vital metabolic and neurological functions, the genetic architecture of the hypothalamus remains unknown. Here we conducted multivariate genome-wide association studies (GWAS) using hypothalamic imaging data from 32,956 individuals to uncover the genetic underpinnings of the hypothalamus and its involvement in neuropsychiatric traits. There were 23 significant loci associated with the whole hypothalamus and its subunits, with functional enrichment for genes involved in intracellular trafficking systems and metabolic processes of steroid-related compounds. The hypothalamus exhibited substantial genetic associations with limbic system structures and neuropsychiatric traits including chronotype, risky behaviour, cognition, satiety and sympathetic-parasympathetic activity. The strongest signal in the primary GWAS, the ADAMTS8 locus, was replicated in three independent datasets (N = 1,685-4,321) and was strengthened after meta-analysis. Exome-wide association analyses added evidence to the association for ADAMTS8, and Mendelian randomization showed lower ADAMTS8 expression with larger hypothalamic volumes. The current study advances our understanding of complex structure-function relationships of the hypothalamus and provides insights into the molecular mechanisms that underlie hypothalamic formation., (© 2024. The Author(s), under exclusive licence to Springer Nature Limited.)
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- 2024
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250. Intensive Longitudinal Social Sensing in Patients With Psychosis Spectrum Disorders: An Exploratory Pilot Study.
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von Heyden M, Grube P, Sack M, Wiesner J, Frank O, Becker K, Heintz S, Reinhard I, Hohmann S, Hirjak D, Meyer-Lindenberg A, and Braun U
- Abstract
Background: Psychosis spectrum disorders are characterized by significant alterations in social functioning, which is a major factor for patient recovery. Despite its importance, objectively quantifying the complex day-to-day social behavior in real-life settings has rarely been attempted. Here, we conducted a pilot study with wearable sensors that passively and continuously register interactions with other participants. We hypothesized that the amount and pattern of social interaction was associated with the severity of psychotic symptoms., Study Design: We recruited 7 patients with psychosis spectrum disorders and 18 team members from a Soteria-style ward. Each participant wore a radio frequency identification badge, sending and receiving signals from nearby badges, allowing passive quantification of social interactions. In addition, symptom severity was assessed weekly by the Positive and Negative Syndrome Scale (PANSS)., Study Results: During an 11-week period, we identified 17 970 interactions among patients and staff. On average, patients spent 2.6 h per day interacting, capturing relevant aspects of daily social life. Relative daily interaction time, average interaction duration, and clustering coefficient, a measure of local network integration, were significantly associated with lower PANSS scores. Self-reported interaction time did not correlate with measured interaction time or with PANSS, indicating the importance of objective markers., Conclusions: This pilot study demonstrates the feasibility of passively recording social interaction of patients and staff at high resolution and for a long observation period in a real-life setting in a psychiatric department. We show links between quantified social interaction and psychopathology that may facilitate development and personalization of targeted treatments., (© The Author(s) 2024. Published by Oxford University Press on behalf of the Maryland Psychiatric Research Center.)
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- 2024
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