1,182 results on '"Bartmann, P."'
Search Results
2. Ovarian cancer cells regulate their mitochondrial content and high mitochondrial content is associated with a poor prognosis
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Weigelt, Jil, Petrosyan, Mariam, Oliveira-Ferrer, Leticia, Schmalfeldt, Barbara, Bartmann, Catharina, Dietl, Johannes, Stürken, Christine, and Schumacher, Udo
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- 2024
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3. X-ray beam diagnostics at the MID instrument of the European X-ray Free-Electron Laser Facility
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Ulrike Boesenberg, Gabriele Ansaldi, Alexander Bartmann, Lewis Batchelor, Felix Brausse, Jörg Hallmann, Wonhyuk Jo, Chan Kim, Birthe Klein, Iker Lobato, Wei Lu, Johannes Möller, Ilia Petrov, Angel Rodriguez-Fernandez, Andreas Schmidt, Markus Scholz, Roman Shayduk, Konstantin Sukharnikov, Alexey Zozulya, and Anders Madsen
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x-ray free-electron lasers ,beam diagnostics ,bent-diamond-crystal spectrometer ,materials imaging and dynamics instrument ,multipurpose diagnostic end-station ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 ,Crystallography ,QD901-999 - Abstract
The Materials Imaging and Dynamics (MID) instrument at the European X-ray Free-Electron Laser Facility (EuXFEL) is equipped with a multipurpose diagnostic end-station (DES) at the end of the instrument. The imager unit in DES is a key tool for aligning the beam to a standard trajectory and for adjusting optical elements such as focusing lenses or the split-and-delay line. Furthermore, the DES features a bent-diamond-crystal spectrometer to disperse the spectrum of the direct beam to a line detector. This enables pulse-resolved characterization of the EuXFEL spectrum to provide X-ray energy calibration, and the spectrometer is particularly useful in commissioning special modes of the accelerator. Together with diamond-based intensity monitors, the imager and spectrometer form the DES unit which also contains a heavy-duty beamstop at the end of the MID instrument. Here, we describe the setup in detail and provide exemplary beam diagnostic results.
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- 2024
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4. Imaging for local recurrence of breast cancer
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Schlaiss, T., Bott, L., Herbert, S.-L., Bartmann, C., Kiesel, M., Salmen, J., Sauer, S. T., Christner, S. A., Petritsch, B., Grunz, J.-P., Woeckel, A., Löb, S., and Diessner, J.
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- 2024
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5. Consistently lower volumes across thalamus nuclei in very premature-born adults
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Melissa Thalhammer, Mehul Nimpal, Julia Schulz, Veronica Meedt, Aurore Menegaux, Benita Schmitz-Koep, Marcel Daamen, Henning Boecker, Claus Zimmer, Josef Priller, Dieter Wolke, Peter Bartmann, Dennis Hedderich, and Christian Sorg
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Brain development ,Preterm birth ,Thalamus nuclei ,Structural magnetic resonance imaging ,Intelligence quotient ,Intensity of neonatal treatment ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Lasting thalamus volume reduction after preterm birth is a prominent finding. However, whether thalamic nuclei volumes are affected differentially by preterm birth and whether nuclei aberrations are relevant for cognitive functioning remains unknown.Using T1-weighted MR-images of 83 adults born very preterm (≤ 32 weeks’ gestation; VP) and/or with very low body weight (≤ 1,500 g; VLBW) as well as of 92 full-term born (≥ 37 weeks’ gestation) controls, we compared thalamic nuclei volumes of six subregions (anterior, lateral, ventral, intralaminar, medial, and pulvinar) across groups at the age of 26 years. To characterize the functional relevance of volume aberrations, cognitive performance was assessed by full-scale intelligence quotient using the Wechsler Adult Intelligence Scale and linked to volume reductions using multiple linear regression analyses.Thalamic volumes were significantly lower across all examined nuclei in VP/VLBW adults compared to controls, suggesting an overall rather than focal impairment. Lower nuclei volumes were linked to higher intensity of neonatal treatment, indicating vulnerability to stress exposure after birth. Furthermore, we found that single results for lateral, medial, and pulvinar nuclei volumes were associated with full-scale intelligence quotient in preterm adults, albeit not surviving correction for multiple hypotheses testing.These findings provide evidence that lower thalamic volume in preterm adults is observable across all subregions rather than focused on single nuclei. Data suggest the same mechanisms of aberrant thalamus development across all nuclei after premature birth.
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- 2024
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6. Faecal egg count reduction tests and nemabiome analysis reveal high frequency of multi-resistant parasites on sheep farms in north-east Germany involving multiple strongyle parasite species
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Jürgen Krücken, Paula Ehnert, Stefan Fiedler, Fabian Horn, Christina S. Helm, Sabrina Ramünke, Tanja Bartmann, Alexandra Kahl, Ann Neubert, Wiebke Weiher, Ricarda Daher, Werner Terhalle, Alexandra Klabunde-Negatsch, Stephan Steuber, and Georg von Samson-Himmelstjerna
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Infectious and parasitic diseases ,RC109-216 - Abstract
Anthelmintic resistance in sheep parasitic gastrointestinal nematodes is widespread and a severe health and economic issue but prevalence of resistance and involved parasite species are unknown in Germany. Here, the faecal egg count reduction test (FECRT) was performed on eight farms using fenbendazole, ivermectin and moxidectin and on four farms using only moxidectin. A questionnaire was used to obtain data on management practices to potentially identify risk factors for presence of resistance. All requirements of the recently revised WAAVP guideline for diagnosing anthelmintic resistance using the FECRT were applied. Nematode species composition in pre- and post-treatment samples was analysed with the nemabiome approach. Using the eggCounts statistic package, resistance against fenbendazole, ivermectin and moxidectin was found on 7/8, 8/8 and 8/12 farms, respectively. No formal risk factor analysis was conducted since resistance was present on most farms. Comparison with the bayescount R package results revealed substantial agreement between methods (Cohen's κ = 0.774). In contrast, interpretation of data comparing revised and original WAAVP guidelines resulted in moderate agreement (Cohen's κ = 0.444). The FECR for moxidectin was significantly higher than for ivermectin and fenbendazole. Nemabiome data identified 4 to 12 species in pre-treatment samples and treatments caused a small but significant decrease in species diversity (inverse Simpson index). Non-metric multidimensional scaling and k-means clustering were used to identify common patterns in pre- and post-treatment samples. However, post-treatment samples were scattered among the pre-treatment samples. Resistant parasite species differed between farms. In conclusion, the revised FECRT guideline allows robust detection of anthelmintic resistance. Resistance was widespread and involved multiple parasite species. Resistance against both drug classes on the same farm was common. Further studies including additional drugs (levamisole, monepantel, closantel) should combine sensitive FECRTs with nemabiome data to comprehensively characterise the anthelmintic susceptibility status of sheep nematodes in Germany.
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- 2024
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7. Wenn die Geburt ein Trauma hinterlässt …
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Leinweber, Julia, Bartmann, Catharina, and Weidner, Kerstin
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- 2023
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8. Ovarian cancer cells regulate their mitochondrial content and high mitochondrial content is associated with a poor prognosis
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Jil Weigelt, Mariam Petrosyan, Leticia Oliveira-Ferrer, Barbara Schmalfeldt, Catharina Bartmann, Johannes Dietl, Christine Stürken, and Udo Schumacher
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Immunohistochemistry ,Intraperitoneal metastases ,Mitochondria ,Ovarian cancer ,Ovarian cancer prognosis ,Ovarian cancer xenografts ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Most cancer patients ultimately die from the consequences of distant metastases. As metastasis formation consumes energy mitochondria play an important role during this process as they are the most important cellular organelle to synthesise the energy rich substrate ATP, which provides the necessary energy to enable distant metastasis formation. However, mitochondria are also important for the execution of apoptosis, a process which limits metastasis formation. We therefore wanted to investigate the mitochondrial content in ovarian cancer cells and link its presence to the patient’s prognosis in order to analyse which of the two opposing functions of mitochondria dominates during the malignant progression of ovarian cancer. Monoclonal antibodies directed against different mitochondrial specific proteins, namely heat shock proteins 60 (HSP60), fumarase and succinic dehydrogenase, were used in immunohistochemistry in preliminary experiments to identify the antibody most suited to detect mitochondria in ovarian cancer cells in clinical tissue samples. The clearest staining pattern, which even delineated individual mitochondria, was seen with the anti-HSP60 antibody, which was used for the subsequent clinical study staining primary ovarian cancers (n = 155), borderline tumours (n = 24) and recurrent ovarian cancers (n = 26). The staining results were semi-quantitatively scored into three groups according to their mitochondrial content: low (n = 26), intermediate (n = 50) and high (n = 84). Survival analysis showed that high mitochondrial content correlated with a statistically significant overall reduced survival rate In addition to the clinical tissue samples, mitochondrial content was analysed in ovarian cancer cells grown in vitro (cell lines: OVCAR8, SKOV3, OVCAR3 and COV644) and in vivo in severe combined immunodeficiency (SCID) mice. In in vivo grown SKOV3 and OVCAR8 cells, the number of mitochondria positive cells was markedly down-regulated compared to the in vitro grown cells indicating that mitochondrial number is subject to regulatory processes. As high mitochondrial content is associated with a poor prognosis, the provision of high energy substrates by the mitochondria seems to be more important for metastasis formation than the inhibition of apoptotic cell death, which is also mediated by mitochondria. In vivo and in vitro grown human ovarian cancer cells showed that the mitochondrial content is highly adaptable to the growth condition of the cancer cells.
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- 2024
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9. Item distribution, internal consistency and structural validity of the German language person-centred climate questionnaire - staff version (PCQ-G-S): a cross-sectional study
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Denise Wilfling, Ralph Möhler, Almuth Berg, Jonas Dörner, Natascha Bartmann, Thomas Klatt, Gabriele Meyer, Margareta Halek, Sascha Köpke, and Martin N. Dichter
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Person-centeredness ,Dementia ,Validity ,Instrument ,Psychometric properties ,Nursing homes ,Geriatrics ,RC952-954.6 - Abstract
Abstract Background Person-centredness is considered as best practice for people living with dementia. A frequently used instrument to assess person-centredness of a care environment is the Person-centred Climate Questionnaire (PCQ). The questionnaire comprises of 14 items with the three subscales a climate of safety, a climate of everydayness and a climate of community. Aim The aim of the study is to describe the translation process of the English language Person-centred Climate Questionnaire (Staff version, Patient version, Family version) into German language (PCQ-G) and to evaluate the first psychometric properties of the German language Person-centred Climate Questionnaire– Staff version (PCQ-G-S). Methods We conducted a cross-sectional study. The three versions of the 14-item English PCQ were translated into German language (PCQ-G) based on the recommendations for cross-cultural adaption of measures. Item distribution, internal consistency and structural validity of the questionnaire were assessed among nursing home staff (PCQ-G-S). Item distribution was calculated using descriptive statistics. Structural validity was tested using principal component analysis (PCA), and internal consistency was assessed for the resulting subscales using Cronbach’s alpha. Data collection took place from May to September 2021. Results A total sample of 120 nurses was included in the data analysis. Nine out of 14 items of the PCQ-G-S demonstrated acceptable item difficulty, while five times showed a ceiling effect. The PCA analysis demonstrated a strong structural validity for a three-factor solution explaining 68.6% of the total variance. The three subscales demonstrated a good internal consistency with Cronbach’s alpha scores of 0.8 for each of the subscales. Conclusion The analysis of the 14-item German version (PCQ-G-S) showed first evidence for a strong internal consistency and structural validity for evaluating staff perceptions of the person-centredness in German nursing homes. Based on this, further investigations for scale validity of the PCQ-G versions should be carried out.
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- 2024
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10. Design of a new SPS injection system via numerical optimisation
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Waagaard, E., Barnes, M. J., Bartmann, W., Borburgh, J., Ducimetière, L. S., Kramer, T., Stadlbauer, T., Trubacova, P., and Velotti, F. M.
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Physics - Accelerator Physics - Abstract
The Super Proton Synchrotron (SPS) injection system plays a fundamental role to preserve the quality of injected high-brightness beams for the Large Hadron Collider (LHC) physics program and to maintain the maximum storable intensity. The present system is the result of years of upgrades and patches of a system not conceived for such intensities and beam qualities. In this study, we propose the design of a completely new injection system for the SPS using multi-level numerical optimisation, including realistic hardware assumptions. We also present how this hierarchical optimisation framework can be adapted to other situations for optimal accelerator system design.
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- 2022
11. Application of complexes from phycocyanin and pectin in a model beverage system
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Stephan Buecker, Laura Bartmann, Kira Hess, Sara Bussler, Monika Gibis, and Jochen Weiss
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Drink ,Natural ,Spirulina blue ,Coloring food ,Sustainable ,Innovation ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
The blue-appearing phycocyanin from the cyanobacteria Arthrospira platensis undergoes severe color losses during food production or storage. Thus, many studies have looked at stabilizing phycocyanin against processing conditions such as heat with biopolymer complexes. The promising results have not yet been applied to beverage systems. In this study, complexes of pectin and phycocyanin were evaluated for color stability in double distilled water and a model beverage system. The color stability was tested under severe storage conditions. With a z-average diameter of 326 ± 26 nm, the complexes of phycocyanin and pectin remained smaller than pure phycocyanin (415 ± 71 nm) after heating and storage for 13 days. This could assure a better colloidal stability of the color. Kinetic modelling showed that the color degradation was slowed down by the application of complexes between phycocyanin and pectin from a half-life (t1/2) of 74 days to 117 days. A decreased color degradation could be confirmed in the model beverage although an initial color shift which needs to be considered. The color difference between the original hue at day 0 and the samples stained with phycocyanin alone exceeded that of the beverages stained with the complexes from day 10 to 13.
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- 2024
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12. New approach methods to assess developmental and adult neurotoxicity for regulatory use: a PARC work package 5 project
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Tamara Tal, Oddvar Myhre, Ellen Fritsche, Joëlle Rüegg, Kai Craenen, Kiara Aiello-Holden, Caroline Agrillo, Patrick J. Babin, Beate I. Escher, Hubert Dirven, Kati Hellsten, Kristine Dolva, Ellen Hessel, Harm J. Heusinkveld, Yavor Hadzhiev, Selma Hurem, Karolina Jagiello, Beata Judzinska, Nils Klüver, Anja Knoll-Gellida, Britta A. Kühne, Marcel Leist, Malene Lislien, Jan L. Lyche, Ferenc Müller, John K. Colbourne, Winfried Neuhaus, Giorgia Pallocca, Bettina Seeger, Ilka Scharkin, Stefan Scholz, Ola Spjuth, Monica Torres-Ruiz, and Kristina Bartmann
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new approach method (NAM) ,developmental neurotoxicity (DNT) ,adult neurotoxicity (ANT) ,DNT-IVB ,zebrafish ,applicability domain ,Toxicology. Poisons ,RA1190-1270 - Abstract
In the European regulatory context, rodent in vivo studies are the predominant source of neurotoxicity information. Although they form a cornerstone of neurotoxicological assessments, they are costly and the topic of ethical debate. While the public expects chemicals and products to be safe for the developing and mature nervous systems, considerable numbers of chemicals in commerce have not, or only to a limited extent, been assessed for their potential to cause neurotoxicity. As such, there is a societal push toward the replacement of animal models with in vitro or alternative methods. New approach methods (NAMs) can contribute to the regulatory knowledge base, increase chemical safety, and modernize chemical hazard and risk assessment. Provided they reach an acceptable level of regulatory relevance and reliability, NAMs may be considered as replacements for specific in vivo studies. The European Partnership for the Assessment of Risks from Chemicals (PARC) addresses challenges to the development and implementation of NAMs in chemical risk assessment. In collaboration with regulatory agencies, Project 5.2.1e (Neurotoxicity) aims to develop and evaluate NAMs for developmental neurotoxicity (DNT) and adult neurotoxicity (ANT) and to understand the applicability domain of specific NAMs for the detection of endocrine disruption and epigenetic perturbation. To speed up assay time and reduce costs, we identify early indicators of later-onset effects. Ultimately, we will assemble second-generation developmental neurotoxicity and first-generation adult neurotoxicity test batteries, both of which aim to provide regulatory hazard and risk assessors and industry stakeholders with robust, speedy, lower-cost, and informative next-generation hazard and risk assessment tools.
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- 2024
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13. Traumatische Geburt und traumasensible Geburtsbegleitung
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Weidner, Kerstin, Bartmann, Catharina, and Leinweber, Julia
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- 2023
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14. Evaluation of different imaging modalities for axillary lymph node staging in breast cancer patients to provide a personalized and optimized therapy algorithm
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Diessner, Joachim, Anders, Laura, Herbert, Saskia, Kiesel, Matthias, Bley, Thorsten, Schlaiss, Tanja, Sauer, Stephanie, Wöckel, Achim, and Bartmann, Catharina
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- 2023
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15. Changes in neonatal morbidity, neonatal care practices, and length of hospital stay of surviving infants born very preterm in the Netherlands in the 1980s and in the 2000s: a comparison analysis with identical characteristics definitions
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Réka E. Sexty, Sylvia van der Pal, Sijmen A. Reijneveld, Dieter Wolke, Guido Lüchters, Leonhard Bakker, Stef van Buuren, Arend F. Bos, and Peter Bartmann
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Very preterm infant ,Neonatal morbidity ,Neonatal care practices ,POPS ,LOLLIPOP ,RECAP preterm ,Pediatrics ,RJ1-570 - Abstract
Abstract Background This study evaluates changes in the neonatal morbidity, the neonatal care practices, and the length of hospital stay of surviving very preterm (VP) infants born in the Netherlands in the 1980s and in the 2000s; a period over which historical improvements were introduced into neonatal care. We, herein, also study whether these changes in neonatal morbidity, neonatal care practices and length of hospital stay are associated with sociodemographic, prenatal, and infant characteristics. Methods Two community-based cohorts from 1983 (POPS) and 2002−03 (LOLLIPOP) have provided the perinatal data for our study. The analysis enrolled 1,228 participants born VP (before the 32nd week of gestation) and surviving to 2 years of age without any severe congenital malformation. A rigorous harmonisation protocol ensured a precise comparison of the cohorts by using identical definitions of the perinatal characteristics. Results In 2003, mothers were older when giving birth, had higher multiple birth rates, and significantly more parents had received higher education. In 2003, less VP infants had severe intraventricular haemorrhage and sepsis and relatively more received continuous positive airway pressure, mechanical ventilation and caffeine therapy than in 1983. Antenatal corticosteroids and surfactant therapy were provided only in 2003. The length of the stay in the neonatal intensive care unit and in hospital had decreased in 2003 by 22 and 11 days, respectively. Differences persisted after adjustment for sociodemographic, prenatal, and infant characteristics. Conclusions Neonatal morbidities of the surviving VP infants in this study have not increased, and exhibit improvements for various characteristics in two cohorts born 20 years apart with comparable gestational age and birth weight. Our data suggest that the improvements found are associated with more advanced therapeutic approaches and new national protocols in place, and less so with sociodemographic changes. This analysis provides a basis for further comparative analyses of the health and the development of VP children, particularly with regard to long-term outcomes.
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- 2023
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16. Introducing an Abusive Language Classification Framework for Telegram to Investigate the German Hater Community
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Wich, Maximilian, Gorniak, Adrian, Eder, Tobias, Bartmann, Daniel, Çakici, Burak Enes, and Groh, Georg
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Computer Science - Computation and Language - Abstract
Since traditional social media platforms continue to ban actors spreading hate speech or other forms of abusive languages (a process known as deplatforming), these actors migrate to alternative platforms that do not moderate users content. One popular platform relevant for the German hater community is Telegram for which limited research efforts have been made so far. This study aims to develop a broad framework comprising (i) an abusive language classification model for German Telegram messages and (ii) a classification model for the hatefulness of Telegram channels. For the first part, we use existing abusive language datasets containing posts from other platforms to develop our classification models. For the channel classification model, we develop a method that combines channel-specific content information collected from a topic model with a social graph to predict the hatefulness of channels. Furthermore, we complement these two approaches for hate speech detection with insightful results on the evolution of the hater community on Telegram in Germany. We also propose methods for conducting scalable network analyses for social media platforms to the hate speech research community. As an additional output of this study, we provide an annotated abusive language dataset containing 1,149 annotated Telegram messages.
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- 2021
17. Changes in neonatal morbidity, neonatal care practices, and length of hospital stay of surviving infants born very preterm in the Netherlands in the 1980s and in the 2000s: a comparison analysis with identical characteristics definitions
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Sexty, Réka E., van der Pal, Sylvia, Reijneveld, Sijmen A., Wolke, Dieter, Lüchters, Guido, Bakker, Leonhard, van Buuren, Stef, Bos, Arend F., and Bartmann, Peter
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- 2023
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18. Attitudes and knowledge of nurses working at night and sleep promotion in nursing home residents: multicenter cross-sectional survey
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Wilfling, Denise, Berg, Almuth, Dörner, Jonas, Bartmann, Natascha, Klatt, Thomas, Meyer, Gabriele, Halek, Margareta, Möhler, Ralph, Köpke, Sascha, and Dichter, Martin N.
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- 2023
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19. Comparative evaluation of the health utilities index mark 3 and the short form 6D: evidence from an individual participant data meta-analysis of very preterm and very low birthweight adults
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Bolbocean, Corneliu, Anderson, Peter J., Bartmann, Peter, Cheong, Jeanie L. Y., Doyle, Lex W., Wolke, Dieter, and Petrou, Stavros
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- 2023
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20. ADHD symptoms and diagnosis in adult preterms: systematic review, IPD meta-analysis, and register-linkage study
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Robinson, Rachel, Girchenko, Polina, Pulakka, Anna, Heinonen, Kati, Lähdepuro, Anna, Lahti-Pulkkinen, Marius, Hovi, Petteri, Tikanmäki, Marjaana, Bartmann, Peter, Lano, Aulikki, Doyle, Lex W., Anderson, Peter J., Cheong, Jeanie L. Y., Darlow, Brian A., Woodward, Lianne J., Horwood, L. John, Indredavik, Marit S., Evensen, Kari Anne I., Marlow, Neil, Johnson, Samantha, de Mendonca, Marina Goulart, Kajantie, Eero, Wolke, Dieter, and Räikkönen, Katri
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- 2023
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21. Optimized process quality in certified breast centers through adherence to stringent diagnostic and therapeutic algorithms effects of structural as well as socio-demographic factors on start of therapy
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Herbert, Saskia-Laureen, Hirzle, Paula, Bartmann, Catharina, Schlaiß, Tanja, Kiesel, Matthias, Curtaz, Carolin, Löb, Sanja, Wöckel, Achim, and Diessner, Joachim
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- 2023
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22. ECMO-Therapie bei COVID-19-ARDS in der Schwangerschaft ermöglicht den Erhalt einer Schwangerschaft mit termingerechter Entbindung
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Sitter, Magdalena, Fröhlich, Corinna, Kranke, Peter, Markus, Christian, Wöckel, Achim, Rehn, Monika, Bartmann, Catharina, Frieauff, Eric, Meybohm, Patrick, Pecks, Ulrich, and Röder, Daniel
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- 2023
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23. Empty-Sella-Syndrom und/oder Normaldruckglaukom?
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Bartmann, Iva R., Kallenberg, Kai, Alnawaiseh, Maged, and Mihailovic, Natasa
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- 2023
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24. Behavioral Interventions to Improve Home-Based Office-Workers’ Health
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Bartmann, Nina, Cloughesy, Jonathan N., Probst, Birgit M., Romagnoli, Giorgia, and Woerner, Andrej
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- 2023
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25. Health-Related Quality-of-Life Outcomes of Very Preterm or Very Low Birth Weight Adults: Evidence From an Individual Participant Data Meta-Analysis
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Bolbocean, Corneliu, van der Pal, Sylvia, van Buuren, Stef, Anderson, Peter J., Bartmann, Peter, Baumann, Nicole, Cheong, Jeanie L. Y., Darlow, Brian A., Doyle, Lex W., Evensen, Kari Anne I., Horwood, John, Indredavik, Marit S., Johnson, Samantha, Marlow, Neil, Mendonça, Marina, Ni, Yanyan, Wolke, Dieter, Woodward, Lianne, Verrips, Erik, and Petrou, Stavros
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- 2023
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26. Spatially Resolved Thermoelectric Effects in Operando Semiconductor-Metal Nanowire Heterostructures
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Gächter, Nadine, Könemann, Fabian, Sistani, Masiar, Bartmann, Maximilian G., Sousa, Marilyne, Staudinger, Philipp, Lugstein, Alois, and Gotsmann, Bernd
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Physics - Applied Physics ,Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
The thermoelectric properties of a nanoscale germanium segment connected by aluminium nanowires are studied using scanning thermal microscopy. The germanium segment of 168\,nm length features atomically sharp interfaces to the aluminium wires and is surrounded by an Al$_2$O$_3$ shell. The temperature distribution along the self-heated nanowire is measured as a function of the applied electrical current, for both Joule and Peltier effects. An analysis is developed that is able to extract the thermal and thermoelectric properties including thermal conductivity, the thermal boundary resistance to the substrate and the Peltier coefficient from a single measurement. Our investigations demonstrate the potential of quantitative measurements of temperature around self-heated devices and structures down to the scattering length of heat carriers., Comment: Main Text: 10 pages, 5 figures Supplementals: 7 pages, 8 figures
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- 2020
27. Plasmon-Driven Hot Electron Transfer at Atomically Sharp Metal-Semiconductor Nanojunctions
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Sistani, Masiar, Bartmann, Maximilian G., Güsken, Nicholas A., Oulton, Rupert F., Keshmiri, Hamid, Luong, Minh Anh, Sadre-Momtaz, Zahra, Hertog, Martien I. den, and Lugstein, Alois
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Physics - Applied Physics ,Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
Recent advances in guiding and localizing light at the nanoscale exposed the enormous potential of ultra-scaled plasmonic devices. In this context, the decay of surface plasmons to hot carriers triggers a variety of applications in boosting the efficiency of energy-harvesting, photo-catalysis and photo-detection. However, a detailed understanding of plasmonic hot carrier generation and particularly the transfer at metal-semiconductor interfaces is still elusive. In this paper, we introduce a monolithic metal-semiconductor (Al-Ge) heterostructure device, providing a platform to examine surface plasmon decay and hot electron transfer at an atomically sharp Schottky nanojunction. The gated metal-semiconductor heterojunction device features electrostatic control of the Schottky barrier height at the Al-Ge interface, enabling hot electron filtering. The ability of momentum matching and to control the energy distribution of plasmon-driven hot electron injection is demonstrated by controlling the interband electron transfer in Ge leading to negative differential resistance.
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- 2020
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28. Reliably straining suspended van der Waals heterostructures
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Daniele Nazzari, Jakob Genser, Masiar Sistani, Maximilian G. Bartmann, Xavier Cartoixà, Riccardo Rurali, Walter M. Weber, and Alois Lugstein
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Biotechnology ,TP248.13-248.65 ,Physics ,QC1-999 - Abstract
2D materials provide a rapidly expanding platform for the observation of novel physical phenomena and for the realization of cutting-edge optoelectronic devices. In addition to their peculiar individual characteristics, 2D materials can be stacked into complex van der Waals heterostructures, greatly expanding their potential. Moreover, thanks to their excellent stretchability, strain can be used as a powerful control knob to tune or boost many of their properties. Here, we present a novel method to reliably and repeatedly apply a high uniaxial tensile strain to suspended van der Waals heterostructures. The reported device is engineered starting from a silicon-on-insulator substrate, allowing for the realization of suspended silicon beams that can amplify the applied strain. The strain module functionality is demonstrated using single- and double-layer graphene layers stacked with a multilayered hexagonal boron nitride flake. The heterostructures can be uniaxially strained, respectively, up to ∼1.2% and ∼1.8%.
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- 2023
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29. Attitudes and knowledge of nurses working at night and sleep promotion in nursing home residents: multicenter cross-sectional survey
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Denise Wilfling, Almuth Berg, Jonas Dörner, Natascha Bartmann, Thomas Klatt, Gabriele Meyer, Margareta Halek, Ralph Möhler, Sascha Köpke, and Martin N. Dichter
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Sleep ,Sleep promotion ,Educational needs ,Nurses’ attitudes ,Nursing homes ,Germany ,Geriatrics ,RC952-954.6 - Abstract
Abstract Background Sleep disturbances are common in nursing home residents and challenging for their nurses. Knowledge about sleep and sleep promoting factors is essential to provide adequate sleep management, where nurses play a key role. Therefore, nurses’ knowledge and attitudes towards sleep and sleep promoting interventions is important as enabling or inhibiting factor for successful sleep management. Methods A multicenter cross-sectional study was conducted among nurses working wholly or partially at night in nursing homes in Germany. Data were collected between February and April 2021 via online or paper and pencil questionnaires, comprising 56 items. Nursing homes were recruited through existing cooperation with the study centers as well as via nursing home registers. Results Finally, 138 nursing homes participated and 271 nurses completed the survey. Nurses agreed that sleep disturbances are an important topic with important impact on resident’ health. Although, the assessment of sleep was seen as nurses’ responsibility, only 40 nurses (14.7%) stated that residents’ sleep was always documented. Only 21.7% reported the availability of policy documents providing guidance regarding the management of sleep disturbances. The vast majority (93.2%) reported never having received training about sleep and management of sleep disturbances after their basic nursing training. Conclusions Our results indicate that nurses working at night can play an important role in residents’ sleep promotion. The findings indicate nurses’ educational needs regarding sleep and sleep promotion. Nursing homes should implement institutional guidelines in order to promote residents’ sleep based on adequate evidence-based non-pharmacological interventions.
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- 2023
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30. Neurodevelopmental toxicity assessment of flame retardants using a human DNT in vitro testing battery
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Klose, Jördis, Pahl, Melanie, Bartmann, Kristina, Bendt, Farina, Blum, Jonathan, Dolde, Xenia, Förster, Nils, Holzer, Anna-Katharina, Hübenthal, Ulrike, Keßel, Hagen Eike, Koch, Katharina, Masjosthusmann, Stefan, Schneider, Sabine, Stürzl, Lynn-Christin, Woeste, Selina, Rossi, Andrea, Covaci, Adrian, Behl, Mamta, Leist, Marcel, Tigges, Julia, and Fritsche, Ellen
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- 2022
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31. Internet Information on Oral Cancer Drugs: a Critical Comparison between Website Providers
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Bartmann, Berit, Schallock, Henriette, Dubois, Clara, Keinki, Christian, Zomorodbakhsch, Bijan, Hartmann, Michael, and Hübner, Jutta
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- 2022
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32. The impact of the COVID-19 pandemic on stress and other psychological factors in pregnant women giving birth during the first wave of the pandemic
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Theresa Hübner, Tanja Wolfgang, Ann-Catrin Theis, Magdalena Steber, Lea Wiedenmann, Achim Wöckel, Joachim Diessner, Grit Hein, Marthe Gründahl, Ulrike Kämmerer, Sarah Kittel-Schneider, and Catharina Bartmann
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COVID-19 pandemic ,Concern ,Depression ,Anxiety ,Maternal bonding ,Self-efficacy ,Gynecology and obstetrics ,RG1-991 - Abstract
Plain Language Summary The global pandemic of COVID-19 (coronavirus induced disease 2019) is challenging our society in many ways. Especially pregnant women are facing extraordinary conditions and worries, like uncertain risks for mother and fetus in case of infection, restricted prenatal classes or restricted visitor regulations in hospitals. Particularly it is known that pregnancy and the postnatal period are presenting a more psychologically vulnerable time in a woman’s life. Developing the GeZeCO study, we aimed to focus on the pandemic’s effects on mental health of pregnant women during this time. Women giving birth in the department of obstetrics of the University Hospital Würzburg were asked to participate in the study. In total, 94 women completed several questionnaires concerning their mental health postpartum and again after 3 to 6 months. Further, we took blood samples of the women during the delivery stay and registered sociodemographic and obstetric data. Our results showed, that the women’s concern relating to COVID-19, as well as the level of depression and anxiety raised during the pandemic. In addition, the self-efficacy of the mothers was affected by the restriction measures. Despite this, the women had at large a good mother–child-bonding and their competence of active coping increased during time. In summary, we did find that the mental health of obstetric patients is impaired by the COVID-19 pandemic. This points out the importance of not only attending to physical health but also taking care of psychological stress and mental health problems of obstetric patients during this exceptional time.
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- 2022
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33. Erratum zu: Traumatische Geburt und traumasensible Geburtsbegleitung
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Weidner, Kerstin, Bartmann, Catharina, and Leinweber, Julia
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- 2023
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34. COVID-19 in der geburtshilflichen Anästhesie: Prospektive Erfassung von SARS-CoV-2-Infektionen zum Zeitpunkt der Geburt sowie des peripartalen Verlaufs SARS-CoV-2-positiver Schwangerer
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Sitter, Magdalena, Schlesinger, Tobias, Reinhold, Ann-Kristin, Scholler, Axel, von Heymann, Christian, Welfle, Sabine, Bartmann, Catharina, Wöckel, Achim, Kleinschmidt, Stefan, Schneider, Sven, Gottschalk, André, Greve, Susanne, Wermelt, Julius Z., Wiener, Roland, Schulz, Frank, Chappell, Daniel, Brunner, Maya, Neumann, Claudia, Meybohm, Patrick, and Kranke, Peter
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- 2022
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35. A semi-passive beam dilution system for the FCC-ee collider
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Alexander Krainer, Wolfgang Bartmann, Marco Calviani, Yann Dutheil, Anton Lechner, Antonio Perillo Marcone, Salim Ogur, and Rebecca Ramjiawan
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Physics ,QC1-999 ,Optics. Light ,QC350-467 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Abstract The operation modes for the proposed FCC-ee collider foresee a very small beam spot size and stored beam energies of up to 20.6 MJ in Z production. This necessitates a dedicated beam dumping system. To reduce the complexity of the system as well as to minimize the required space, an optimized, semi-passive system has been designed and is presented here. The beam dilution is done with a defocusing triplet structure, followed by passive beam diluter elements (spoilers). This greatly reduces the risk of possible dilution failure scenarios compared to an active dilution kicker-magnet system. The dump core itself is located ∼ 70 m ${\sim}70~\text{m}$ downstream of the spoilers and is designed following the experience gained from the LHC dump. The dilution performance as well as the interaction effects responsible for the energy deposited in the spoiler, are directly related to the radiation length and the dimension of the device in beam direction. Materials for these spoilers have been studied extensively and key requirements have been identified using both Monte Carlo shower simulations and thermo-mechanical Finite Element Analysis. Even though the maximum temperature reached in the spoilers is well within the working temperature range of the material, the induced mechanical stresses can lead to material failure. Thermo-mechanical simulations have shown that the transversal beam shape plays a key role in the magnitude of mechanical stresses as a result of the beam impact and the abrupt temperature change. This problem is addressed in this paper and an optimized solution is presented.
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- 2022
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36. Utilisation of private general practitioners to provide caesarean deliveries in five rural district public hospitals in South Africa: a mixed-methods study
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Tanya Doherty, Emmanuelle Daviaud, Sue Fawcus, Geetesh Solanki, Anthony Hawkridge, and Yvandi Bartmann
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Medicine - Abstract
Objective Researching how public–private engagements may promote universal access to safe obstetric care including caesarean delivery is essential. The aim of this research was to document the utilisation of private general practitioners (GPs) contracted to provide caesarean delivery services in five rural district hospitals in the Western Cape, the profile and outcomes of caesarean deliveries. We also describe stakeholder experiences of these arrangements in order to inform potential models of public–private contracting for obstetric services.Design We used a mixed-methods study design to describe rural district hospitals’ utilisation of private GP contracting for caesarean deliveries. Between April 2021 and March 2022, we collated routine data from delivery and theatre registers to capture the profile of deliveries and maternal outcomes. We conducted 23 semistructured qualitative interviews with district managers, hospital-employed doctors and private GPs to explore their experiences of the contracting arrangements.Setting The study was conducted in five rural district hospitals in the Western Cape province, South Africa.Results The use of private GPs as surgeon or anaesthetist for caesarean deliveries differed widely across the hospitals. Overall, the utilisation of private GPs for anaesthetics was similar (29% of all caesarean deliveries) to the utilisation of private GPs as surgeons (33% of all caesarean deliveries). The proportion of caesarean deliveries undertaken by private GPs as the primary surgeon was inversely related to size of hospital and mean monthly deliveries. Adverse outcomes following a caesarean delivery were rare. Qualitative data provided insights into contributions made by private GPs and the contracting models, which did not incentivise overservicing.Conclusion The findings of this study suggest that private GPs can play an important role in filling gaps and expanding quality care in rural public facilities that have insufficient obstetric skills and expertise. Different approaches to enable access to safe caesarean delivery are needed for different contexts, and contracting with experienced private GP’s is one resource for rural district hospitals to consider.
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- 2023
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37. Aberrant claustrum structure in preterm-born neonates: an MRI study
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Antonia Neubauer, Aurore Menegaux, Jil Wendt, Hongwei Bran Li, Benita Schmitz-Koep, Tobias Ruzok, Melissa Thalhammer, David Schinz, Peter Bartmann, Dieter Wolke, Josef Priller, Claus Zimmer, Daniel Rueckert, Dennis M. Hedderich, and Christian Sorg
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Claustrum ,Neonate ,Brain development ,Preterm birth ,Magnetic resonance imaging ,Subplate neurons ,Computer applications to medicine. Medical informatics ,R858-859.7 ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
The human claustrum is a gray matter structure in the white matter between insula and striatum. Previous analysis found altered claustrum microstructure in very preterm-born adults associated with lower cognitive performance. As the claustrum development is related to hypoxia–ischemia sensitive transient cell populations being at-risk in premature birth, we hypothesized that claustrum structure is already altered in preterm-born neonates.We studied anatomical and diffusion-weighted MRIs of 83 preterm- and 83 term-born neonates at term-equivalent age. Additionally, claustrum development was analyzed both in a spectrum of 377 term-born neonates and longitudinally in 53 preterm-born subjects. Data was provided by the developing Human Connectome Project.Claustrum development showed increasing volume, increasing fractional anisotropy (FA), and decreasing mean diffusivity (MD) around term both across term- and preterm-born neonates. Relative to term-born ones, preterm-born neonates had (i) increased absolute and relative claustrum volumes, both indicating increased cellular and/or extracellular matter and being in contrast to other subcortical gray matter regions of decreased volumes such as thalamus; (ii) lower claustrum FA and higher claustrum MD, pointing at increased extracellular matrix and impaired axonal integrity; and (iii) aberrant covariance between claustrum FA and MD, respectively, and that of distributed gray matter regions, hinting at relatively altered claustrum microstructure.Results together demonstrate specifically aberrant claustrum structure in preterm-born neonates, suggesting altered claustrum development in prematurity, potentially relevant for later cognitive performance.
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- 2023
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38. The impact of the COVID-19 pandemic on stress and other psychological factors in pregnant women giving birth during the first wave of the pandemic
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Hübner, Theresa, Wolfgang, Tanja, Theis, Ann-Catrin, Steber, Magdalena, Wiedenmann, Lea, Wöckel, Achim, Diessner, Joachim, Hein, Grit, Gründahl, Marthe, Kämmerer, Ulrike, Kittel-Schneider, Sarah, and Bartmann, Catharina
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- 2022
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39. A semi-passive beam dilution system for the FCC-ee collider
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Krainer, Alexander, Bartmann, Wolfgang, Calviani, Marco, Dutheil, Yann, Lechner, Anton, Perillo Marcone, Antonio, Ogur, Salim, and Ramjiawan, Rebecca
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- 2022
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40. PARQUE FAUNO
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Veronica Garcia Donoso, Joani Paulus Covaleski, Caroline Machado Bartmann, and Pedro Henrique Marin Taschetto
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projeto paisagístico, parque urbano, excêntrico. ,Architecture ,NA1-9428 ,Urban groups. The city. Urban sociology ,HT101-395 - Abstract
Este artigo apresenta exercício de projeto paisagístico desenvolvido na disciplina “Projeto Urbano e da Paisagem I” do curso de Arquitetura e Urbanismo da Universidade Federal de Santa Maria, campus Cachoeira do Sul, no segundo semestre de 2020. O trabalho explora conceitos de excêntrico e do não usual para desenvolver projeto do parque urbano, buscando, também, maior compreensão da paisagem, história e vegetação do Rio Grande do Sul. O resultado foi um projeto de parque urbano atento às especificidades locais e com definição espacial e compositiva complexa e singular, rompendo alguns formalismos e permitindo à poética grande papel na definição do pensamento da paisagem. O projeto abraça a criatividade e o diferente para criar um universo rico em cenários não convencionalmente explorados no paisagismo, ao mesmo tempo em que permite aos espaços serem multifuncionais e livres para diferentes formas de apropriação. Além disso, explorou composições vegetais unicamente com espécies nativas dos pampas, para maior visibilidade das possibilidades da paisagem sulista e espécies nativas no projeto paisagístico. Espera-se que a divulgação deste trabalho estimule maior sensibilidade no projeto paisagístico, buscando especialmente valorizar a metodologia do conceito e da composição com espécies vegetais para a definição dos espaços e experiências sensoriais promovidas e permitidas pela paisagem.
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- 2022
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41. The effects of the COVID-19 pandemic on psychological stress in breast cancer patients
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Catharina Bartmann, Leah-Maria Fischer, Theresa Hübner, Max Müller-Reiter, Achim Wöckel, Rhiannon V. McNeill, Tanja Schlaiss, Sarah Kittel-Schneider, Ulrike Kämmerer, and Joachim Diessner
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COVID-19 ,Breast Cancer ,Psychological distress ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background The majority of breast cancer patients are severely psychologically affected by breast cancer diagnosis and subsequent therapeutic procedures. The COVID-19 pandemic and associated restrictions on public life have additionally caused significant psychological distress for much of the population. It is therefore plausible that breast cancer patients might be particularly susceptible to the additional psychological stress caused by the pandemic, increasing suffering. In this study we therefore aimed to assess the level of psychological distress currently experienced by a defined group of breast cancer patients in our breast cancer centre, compared to distress levels pre-COVID-19 pandemic. Methods Female breast cancer patients of all ages receiving either adjuvant, neoadjuvant, or palliative therapies were recruited for the study. All patients were screened for current or previous COVID-19 infection. The participants completed a self-designed COVID-19 pandemic questionnaire, the Stress and Coping Inventory (SCI), the National Comprehensive Cancer Network® (NCCN®) Distress Thermometer (DT), the European Organization for Research and Treatment of Cancer (EORTC) QLQ C30, and the BR23. Results Eighty-two breast cancer patients were included. Therapy status and social demographic factors did not have a significant effect on the distress caused by the COVID-19 pandemic. The results of the DT pre and during COVID-19 pandemic did not differ significantly. Using the self-designed COVID-19 pandemic questionnaire, we detected three distinct subgroups demonstrating different levels of concerns in relation to SARS-CoV-2. The subgroup with the highest levels of concern reported significantly decreased life quality, related parameters and symptoms. Conclusions This monocentric study demonstrated that the COVID-19 pandemic significantly affected psychological health in a subpopulation of breast cancer patients. The application of a self-created “COVID-19 pandemic questionnaire” could potentially be used to help identify breast cancer patients who are susceptible to increased psychological distress due to the COVID-19 pandemic, and therefore may need additional intensive psychological support. Trial registration DRKS-ID: DRKS00022507 .
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- 2021
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42. Studium ohne Abitur – Bildungsentscheidungen und biografische Übergänge
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Frank Kotterer, Andrea Broens, Juhyeok Lee, Sylke Bartmann, Detlef Garz, and Olaf Zawacki-Richter
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Education - Abstract
Der Beitrag diskutiert zwei Biografien nicht-traditionell Studierender, die den Hochschulzugang über das Ablegen einer Zulassungsprüfung erhalten haben. Zur Rekonstruktion der Motivstrukturen und der weiterführenden biografischen Verläufe nach dem Studium wurden narrative Interviews mit der Objektiven Hermeneutik ausgewertet. Beide Fälle stehen für ausgeprägte Erfolgsgeschichten, unterscheiden sich jedoch hinsichtlich der Motive, Werthaltungen, Strategien und Zielvorstellungen, die auch durch Familie und Milieu geprägt sind. Abschließend erfolgt ein Fallvergleich, der auf die hohe Bedeutsamkeit von Bildungsoptionen für diese Personengruppe hinweist.
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- 2022
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43. Lower hypothalamus subunit volumes link with impaired long-term body weight gain after preterm birth
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Tobias Ruzok, Benita Schmitz-Koep, Aurore Menegaux, Robert Eves, Marcel Daamen, Henning Boecker, Esther Rieger-Fackeldey, Josef Priller, Claus Zimmer, Peter Bartmann, Dieter Wolke, Christian Sorg, and Dennis M. Hedderich
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body weight gain ,hypothalamus subunits ,preterm birth ,small for gestational age ,catch-up growth ,magnetic resonance imaging ,Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
IntroductionPreterm birth is associated with an increased risk for impaired body weight gain. While it is known that in prematurity several somatic and environmental factors (e.g., endocrine factors, nutrition) modulate short- and long-term body weight gain, the contribution of potentially impaired body weight control in the brain remains elusive. We hypothesized that the structure of hypothalamic nuclei involved in body weight control is altered after preterm birth, with these alterations being associated with aberrant body weight development into adulthood.Materials and methodsWe assessed 101 very preterm (i.e.,
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- 2022
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44. Molecular and Functional Characterization of Different BrainSphere Models for Use in Neurotoxicity Testing on Microelectrode Arrays
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Julia Hartmann, Noah Henschel, Kristina Bartmann, Arif Dönmez, Gabriele Brockerhoff, Katharina Koch, and Ellen Fritsche
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hiPSCs ,organoids ,neural induction ,neural differentiation ,brain ,in vitro ,Cytology ,QH573-671 - Abstract
The currently accepted methods for neurotoxicity (NT) testing rely on animal studies. However, high costs and low testing throughput hinder their application for large numbers of chemicals. To overcome these limitations, in vitro methods are currently being developed based on human-induced pluripotent stem cells (hiPSC) that allow higher testing throughput at lower costs. We applied six different protocols to generate 3D BrainSphere models for acute NT evaluation. These include three different media for 2D neural induction and two media for subsequent 3D differentiation resulting in self-organized, organotypic neuron/astrocyte microtissues. All induction protocols yielded nearly 100% NESTIN-positive hiPSC-derived neural progenitor cells (hiNPCs), though with different gene expression profiles concerning regional patterning. Moreover, gene expression and immunocytochemistry analyses revealed that the choice of media determines neural differentiation patterns. On the functional level, BrainSpheres exhibited different levels of electrical activity on microelectrode arrays (MEA). Spike sorting allowed BrainSphere functional characterization with the mixed cultures consisting of GABAergic, glutamatergic, dopaminergic, serotonergic, and cholinergic neurons. A test method for acute NT testing, the human multi-neurotransmitter receptor (hMNR) assay, was proposed to apply such MEA-based spike sorting. These models are promising tools not only in toxicology but also for drug development and disease modeling.
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- 2023
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45. PUMA, antiProton unstable matter annihilation: PUMA collaboration
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Aumann, T., Bartmann, W., Boine-Frankenheim, O., Bouvard, A., Broche, A., Butin, F., Calvet, D., Carbonell, J., Chiggiato, P., De Gersem, H., De Oliveira, R., Dobers, T., Ehm, F., Somoza, J. Ferreira, Fischer, J., Fraser, M., Friedrich, E., Frotscher, A., Gomez-Ramos, M., Grenard, J.-L., Hobl, A., Hupin, G., Husson, A., Indelicato, P., Johnston, K., Klink, C., Kubota, Y., Lazauskas, R., Malbrunot-Ettenauer, S., Marsic, N., O Müller, W. F., Naimi, S., Nakatsuka, N., Necca, R., Neidherr, D., Neyens, G., Obertelli, A., Ono, Y., Pasinelli, S., Paul, N., Pollacco, E. C., Rossi, D., Scheit, H., Schlaich, M., Schmidt, A., Schweikhard, L., Seki, R., Sels, S., Siesling, E., Uesaka, T., Vilén, M., Wada, M., Wienholtz, F., Wycech, S., and Zacarias, S.
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- 2022
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46. Sequelae of Premature Birth in Young Adults: Incidental Findings on Routine Brain MRI
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Hedderich, Dennis M., Boeckh-Behrens, Tobias, Bäuml, Josef G., Menegaux, Aurore, Daamen, Marcel, Zimmer, Claus, Bartmann, Peter, Scheef, Lukas, Boecker, Henning, Wolke, Dieter, Sorg, Christian, and Spiro, Judith E.
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- 2021
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47. Preterm children’s long-term academic performance after adaptive computerized training: an efficacy and process analysis of a randomized controlled trial
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Jaekel, Julia, Heuser, Katharina M., Zapf, Antonia, Roll, Claudia, Nuñez, Francisco Brevis, Bartmann, Peter, Wolke, Dieter, Felderhoff-Mueser, Ursula, and Huening, Britta
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- 2021
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48. Decreased amygdala volume in adults after premature birth
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Benita Schmitz-Koep, Juliana Zimmermann, Aurore Menegaux, Rachel Nuttall, Josef G. Bäuml, Sebastian C. Schneider, Marcel Daamen, Henning Boecker, Claus Zimmer, Dieter Wolke, Peter Bartmann, Dennis M. Hedderich, and Christian Sorg
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Medicine ,Science - Abstract
Abstract Premature-born infants have impaired amygdala structure, presumably due to increased stress levels of premature birth mediated by the amygdala. However, accounting for lifelong plasticity of amygdala, it is unclear whether such structural changes persist into adulthood. To address this problem, we stated the following questions: first, are whole amygdala volumes reduced in premature-born adults? And second, as adult anxiety traits are often increased after prematurity and linked with amygdala structure, are alterations in amygdala associated with adults’ anxiety traits after premature birth? We addressed these questions by automated amygdala segmentation of MRI volumes in 101 very premature-born adults (
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- 2021
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49. The LBNO long-baseline oscillation sensitivities with two conventional neutrino beams at different baselines
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Collaboration, LAGUNA-LBNO, Agarwalla, S. K., Agostino, L., Aittola, M., Alekou, A., Andrieu, B., Antoniou, F., Asfandiyarov, R., Autiero, D., Bésida, O., Balik, A., Ballett, P., Bandac, I., Banerjee, D., Bartmann, W., Bay, F., Biskup, B., Blebea-Apostu, A. M., Blondel, A., Bogomilov, M., Bolognesi, S., Borriello, E., Brancus, I., Bravar, A., Buizza-Avanzini, M., Caiulo, D., Calin, M., Calviani, M., Campanelli, M., Cantini, C., Cata-Danil, G., Chakraborty, S., Charitonidis, N., Chaussard, L., Chesneanu, D., Chipesiu, F., Crivelli, P., Dawson, J., De Bonis, I., Declais, Y., Sanchez, P. Del Amo, Delbart, A., Di Luise, S., Duchesneau, D., Dumarchez, J., Efthymiopoulos, I., Eliseev, A., Emery, S., Enqvist, T., Enqvist, K., Epprecht, L., Erykalov, A. N., Esanu, T., Franco, D., Friend, M., Galymov, V., Gavrilov, G., Gendotti, A., Giganti, C., Gilardoni, S., Goddard, B., Gomoiu, C. M., Gornushkin, Y. A., Gorodetzky, P., Haesler, A., Hasegawa, T., Horikawa, S., Huitu, K., Izmaylov, A., Jipa, A., Kainulainen, K., Karadzhov, Y., Khabibullin, M., Khotjantsev, A., Kopylov, A. N., Korzenev, A., Kosyanenko, S., Kryn, D., Kudenko, Y., Kuusiniemi, P., Lazanu, I., Lazaridis, C., Levy, J. -M., Loo, K., Maalampi, J., Margineanu, R. M., Marteau, J., Martin-Mari, C., Matveev, V., Mazzucato, E., Mefodiev, A., Mineev, O., Mirizzi, A., Mitrica, B., Murphy, S., Nakadaira, T., Narita, S., Nesterenko, D. A., Nguyen, K., Nikolics, K., Noah, E., Novikov, Yu., Oprima, A., Osborne, J., Ovsyannikova, T., Papaphilippou, Y., Pascoli, S., Patzak, T., Pectu, M., Pennacchio, E., Periale, L., Pessard, H., Popov, B., Ravonel, M., Rayner, M., Resnati, F., Ristea, O., Robert, A., Rubbia, A., Rummukainen, K., Saftoiu, A., Sakashita, K., Sanchez-Galan, F., Sarkamo, J., Saviano, N., Scantamburlo, E., Sergiampietri, F., Sgalaberna, D., Shaposhnikova, E., Slupecki, M., Smargianaki, D., Stanca, D., Steerenberg, R., Sterian, A. R., Sterian, P., Stoica, S., Strabel, C., Suhonen, J., Suvorov, V., Toma, G., Tonazzo, A., Trzaska, W. H., Tsenov, R., Tuominen, K., Valram, M., Vankova-Kirilova, G., Vannucci, F., Vasseur, G., Velotti, F., Velten, P., Venturi, V., Viant, T., Vihonen, S., Vincke, H., Vorobyev, A., Weber, A., Wu, S., Yershov, N., Zambelli, L., and Zito, M.
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High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
The proposed Long Baseline Neutrino Observatory (LBNO) initially consists of $\sim 20$ kton liquid double phase TPC complemented by a magnetised iron calorimeter, to be installed at the Pyh\"asalmi mine, at a distance of 2300 km from CERN. The conventional neutrino beam is produced by 400 GeV protons accelerated at the SPS accelerator delivering 700 kW of power. The long baseline provides a unique opportunity to study neutrino flavour oscillations over their 1st and 2nd oscillation maxima exploring the $L/E$ behaviour, and distinguishing effects arising from $\delta_{CP}$ and matter. In this paper we show how this comprehensive physics case can be further enhanced and complemented if a neutrino beam produced at the Protvino IHEP accelerator complex, at a distance of 1160 km, and with modest power of 450 kW is aimed towards the same far detectors. We show that the coupling of two independent sub-MW conventional neutrino and antineutrino beams at different baselines from CERN and Protvino will allow to measure CP violation in the leptonic sector at a confidence level of at least $3\sigma$ for 50\% of the true values of $\delta_{CP}$ with a 20 kton detector. With a far detector of 70 kton, the combination allows a $3\sigma$ sensitivity for 75\% of the true values of $\delta_{CP}$ after 10 years of running. Running two independent neutrino beams, each at a power below 1 MW, is more within today's state of the art than the long-term operation of a new single high-energy multi-MW facility, which has several technical challenges and will likely require a learning curve., Comment: 21 pages, 12 figures
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- 2014
50. Optimised sensitivity to leptonic CP violation from spectral information: the LBNO case at 2300 km baseline
- Author
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Collaboration, LAGUNA-LBNO, Agarwalla, S. K., Agostino, L., Aittola, M., Alekou, A., Andrieu, B., Antoniou, F., Asfandiyarov, R., Autiero, D., Bésida, O., Balik, A., Ballett, P., Bandac, I., Banerjee, D., Bartmann, W., Bay, F., Biskup, B., Blebea-Apostu, A. M., Blondel, A., Bogomilov, M., Bolognesi, S., Borriello, E., Brancus, I., Bravar, A., Buizza-Avanzini, M., Caiulo, D., Calin, M., Calviani, M., Campanelli, M., Cantini, C., Cata-Danil, G., Chakraborty, S., Charitonidis, N., Chaussard, L., Chesneanu, D., Chipesiu, F., Crivelli, P., Dawson, J., De Bonis, I., Declais, Y., Sanchez, P. Del Amo, Delbart, A., Di~Luise, S., Duchesneau, D., Dumarchez, J., Efthymiopoulos, I., Eliseev, A., Emery, S., Enqvist, T., Enqvist, K., Epprecht, L., Erykalov, A. N., Esanu, T., Franco, D., Friend, M., Galymov, V., Gavrilov, G., Gendotti, A., Giganti, C., Gilardoni, S., Goddard, B., Gomoiu, C. M., Gornushkin, Y. A., Gorodetzky, P., Haesler, A., Hasegawa, T., Horikawa, S., Huitu, K., Izmaylov, A., Jipa, A., Kainulainen, K., Karadzhov, Y., Khabibullin, M., Khotjantsev, A., Kopylov, A. N., Korzenev, A., Kosyanenko, S., Kryn, D., Kudenko, Y., Kuusiniemi, P., Lazanu, I., Lazaridis, C., Levy, J. -M., Loo, K., Maalampi, J., Margineanu, R. M., Marteau, J., Martin-Mari, C., Matveev, V., Mazzucato, E., Mefodiev, A., Mineev, O., Mirizzi, A., Mitrica, B., Murphy, S., Nakadaira, T., Narita, S., Nesterenko, D. A., Nguyen, K., Nikolics, K., Noah, E., Novikov, Yu., Oprima, A., Osborne, J., Ovsyannikova, T., Papaphilippou, Y., Pascoli, S., Patzak, T., Pectu, M., Pennacchio, E., Periale, L., Pessard, H., Popov, B., Ravonel, M., Rayner, M., Resnati, F., Ristea, O., Robert, A., Rubbia, A., Rummukainen, K., Saftoiu, A., Sakashita, K., Sanchez-Galan, F., Sarkamo, J., Saviano, N., Scantamburlo, E., Sergiampietri, F., Sgalaberna, D., Shaposhnikova, E., Slupecki, M., Smargianaki, D., Stanca, D., Steerenberg, R., Sterian, A. R., Sterian, P., Stoica, S., Strabel, C., Suhonen, J., Suvorov, V., Toma, G., Tonazzo, A., Trzaska, W. H., Tsenov, R., Tuominen, K., Valram, M., Vankova-Kirilova, G., Vannucci, F., Vasseur, G., Velotti, F., Velten, P., Venturi, V., Viant, T., Vihonen, S., Vincke, H., Vorobyev, A., Weber, A., Wu, S., Yershov, N., Zambelli, L., and Zito, M.
- Subjects
High Energy Physics - Phenomenology ,High Energy Physics - Experiment - Abstract
One of the main goals of the Long Baseline Neutrino Observatory (LBNO) is to study the $L/E$ behaviour (spectral information) of the electron neutrino and antineutrino appearance probabilities, in order to determine the unknown CP-violation phase $\delta_{CP}$ and discover CP-violation in the leptonic sector. The result is based on the measurement of the appearance probabilities in a broad range of energies, covering t he 1st and 2nd oscillation maxima, at a very long baseline of 2300 km. The sensitivity of the experiment can be maximised by optimising the energy spectra of the neutrino and anti-neutrino fluxes. Such an optimisation requires exploring an extended range of parameters describing in details the geometries and properties of the primary protons, hadron target and focusing elements in the neutrino beam line. In this paper we present a numerical solution that leads to an optimised energy spectra and study its impact on the sensitivity of LBNO to discover leptonic CP violation. In the optimised flux both 1st and 2nd oscillation maxima play an important role in the CP sensitivity. The studies also show that this configuration is less sensitive to systematic errors (e.g. on the total event rates) than an experiment which mainly relies on the neutrino-antineutrino asymmetry at the 1st maximum to determine the existence of CP-violation., Comment: 25 pages, 20 figures
- Published
- 2014
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