Search

Your search keyword '"Scholz, Peter"' showing total 1,032 results
Start Over Author "Scholz, Peter"
1,032 results on '"Scholz, Peter"'

1. The Influence of Material Configuration of Fibre-Metal Laminates with Alumina Core on Flexural Strength

Author

Frankiewicz Mariusz, Karoluk Michał, Dziedzic Robert, Timmel Tristan, and Scholz Peter

Subjects
fibre-metal laminates, flexural strength, fatigue, composite materials, Transportation engineering, TA1001-1280
Abstract

Fibre metal laminates (FMLs) consisting of layers made of PA6 polyamide prepregs reinforced with glass and carbon fibres and an aluminium alloy core are the new variant of the other types used by aerospace FML materials such as GLARE or CARALL. By using a thermoplastic matrix, they can be shaped by stamping processes, which allows for a more efficient production process than classical laminating methods such as vacuum bagging. In addition to the improved impact energy absorption efficiency, the metallic core can be utilised to effectively bond the composite part to adjacent metallic structures. This article presents the influence of the material configuration of fibre-metal laminates consisting of continuous fibre-reinforced thermoplastic outer layers integrated with a layer of metallic aluminium alloy inserts—a number of layers, type and direction of reinforcing fibres—on the static and fatigue flexural properties. In this study, eight laminate configurations were prepared using a one-step variothermal consolidation process. The results showed that in the three-point flexural fatigue test, the samples exceeded 106 cycles at stresses

Published
2023
Full Text
View/download PDF

5. PROSE: Prospective Randomized Trial of the On-X Mechanical Prosthesis and the St Jude Medical Mechanical Prosthesis Evaluation: Part 2: Study results—prostheses, positions, and economic development

Author

Jamieson, W. R. Eric, Ely, John L., Brink, Johan, Pennel, Timothy, Bannon, Paul, Patel, Jashvant, Gupta, Rajiv Kumar, Mohan Rao, Prasanna Simha, Agrawal, Damyanti, Wiklund, Lars, Kappetein, A. Pieter, Haaverstad, Rune, Geisner, Thomas, Doenst, Torsten, Schlensak, Christian, Nair, Salgunan, Brown, Craig, Siepe, Matthias, Damiano, Ralph J., Langlois, Yves, Cherian, Kotturathu M., Azar, Hormoz, Chen, John C., Bavaria, Joseph E., Fedoruk, Lynn M., Munfakh, Nabil A., Sridhar, V., Scholz, Peter M., Pfeffer, Thomas A., and Ye, Jian

Published
2022
Full Text
View/download PDF

6. Lifetime Experiments of Regeneratively Cooled Rocket Combustion Chambers and PIV Measurements in a High Aspect Ratio Cooling Duct

Author

Hötte, Felix, Günther, Oliver, von Sethe, Christoph, Haupt, Matthias, Scholz, Peter, Rohdenburg, Michael, Hirschel, Ernst Heinrich, Founding Editor, Schröder, Wolfgang, Series Editor, Boersma, Bendiks Jan, Editorial Board Member, Fujii, Kozo, Editorial Board Member, Haase, Werner, Editorial Board Member, Leschziner, Michael A., Editorial Board Member, Periaux, Jacques, Editorial Board Member, Pirozzoli, Sergio, Editorial Board Member, Rizzi, Arthur, Editorial Board Member, Roux, Bernard, Editorial Board Member, Shokin, Yurii I., Editorial Board Member, Mäteling, Esther, Managing Editor, Adams, Nikolaus A., editor, Radespiel, Rolf, editor, Haidn, Oskar J., editor, Sattelmayer, Thomas, editor, Stemmer, Christian, editor, and Weigand, Bernhard, editor

Published
2021
Full Text
View/download PDF

7. Circulation Control Experiments on a Vertical Tail

Author

Singh, Vickram M., Scholz, Peter, Hirschel, Ernst Heinrich, Founding Editor, Schröder, Wolfgang, Series Editor, Boersma, Bendiks Jan, Editorial Board Member, Fujii, Kozo, Editorial Board Member, Haase, Werner, Editorial Board Member, Leschziner, Michael A., Editorial Board Member, Periaux, Jacques, Editorial Board Member, Pirozzoli, Sergio, Editorial Board Member, Rizzi, Arthur, Editorial Board Member, Roux, Bernard, Editorial Board Member, Shokin, Yurii I., Editorial Board Member, Mäteling, Esther, Managing Editor, Radespiel, Rolf, editor, and Semaan, Richard, editor

Published
2021
Full Text
View/download PDF

10. Prediction Capabilities of Two Reynolds Stress Turbulence Models for a Turbulent Wake Subjected to Adverse Pressure Gradient

Author

Burnazzi, Marco, Knopp, Tobias, Strelets, Michale Kh., Shur, Michael L., Travin, Andrey K., Breitenstein, Wiebke, Scholz, Peter, Radespiel, Rolf, Hirschel, Ernst Heinrich, Founding Editor, Schröder, Wolfgang, Series Editor, Boersma, Bendiks Jan, Series Editor, Fujii, Kozo, Series Editor, Haase, Werner, Series Editor, Leschziner, Michael A., Series Editor, Periaux, Jacques, Series Editor, Pirozzoli, Sergio, Series Editor, Rizzi, Arthur, Series Editor, Roux, Bernard, Series Editor, Shokin, Yurii I., Series Editor, Dillmann, Andreas, editor, Heller, Gerd, editor, Krämer, Ewald, editor, Wagner, Claus, editor, Tropea, Cameron, editor, and Jakirlić, Suad, editor

Published
2020
Full Text
View/download PDF

11. Reducing Contact Bouncing of a Relay by Optimizing the Switch Signal During Run-Time

Author

Winkel, Fabian, Scholz, Peter, Wallscheid, Oliver, and Bocker, Joachim

Abstract

Reducing the contact bouncing of electromechanical relays is a key ingredient to increase their switch reliability and overall lifetime. For this reason, this paper presents a control system as well as an optimization algorithm to reduce the kinetic energy of internal relay components by suspending acceleration during each switch cycle. A two-level control of the coil supply voltage is used in order to generate a control signal, which is defined by a certain start time as well as a specified duration. Both values are optimized via a computationally lightweight algorithm using a variant of a particle swarm optimization (PSO), which is a hybrid form of a bare-bone PSO and evolutionary PSO, augmented with dense estimation. Results are presented both qualitatively and quantitatively based on real-world experiments with various sample relays. Using the well-known run-to-run (R2R) algorithm as a baseline, the proposed bouncing optimization algorithm (BOA) reduces the switch on bouncing by 79% (+24% more than R2R) and the switching off bouncing by 59% (+40% more than R2R) compared to a conventional switch cycle without bouncing countermeasures. In addition, the proposed algorithm’s capability of self-adapting to changing environmental circumstances is validated experimentally. Note to Practitioners—Contact bounce increases relay wear. It is therefore desirable to reduce this. For this purpose, many mechanical optimizations have already been carried out. In this work, however, a software solution (BOA) is presented in which an online optimization algorithm is used to design the control signal of the relays in such a way that bouncing is reduced. The acceleration of the contacts is briefly suspended during the switching process, so that the contacts collide with less kinetic energy and, therefore, bounce less - as in the case of elastic impact. With BOA, it is possible to reduce the duration of bouncing by up to 79% during extensive tests. A transfer to various types of relays seems possible, but two points are critical for productization: First, a microcontroller is needed for implementation, which can significantly increase the manufacturing costs of a product. Secondly, a measurement signal of the load side of the relays is necessary, which can be technically challenging.

Published
2024
Full Text
View/download PDF

17. A manager's view on large scale XP projects

Author

Rumpe, Bernhard and Scholz, Peter

Subjects
Computer Science - Software Engineering
Abstract

XP is a code oriented, light weight software engineering methodology, suited merely for small sized teams who develop software that relies on vague or rapidly changing requirements. Being very code oriented, the discipline of systems engineering knows it as approach of incremental system change. In this contribution, we discuss the enhanced version of a concept on how to extend XP on large scale projects with hundreds of software engineers and programmers, respectively. A previous version was already presented in [1]. The basic idea is to apply the "hierarchical approach", a management principle of reorganizing companies, as well as well known moderation principles to XP project organization. We show similarities between software engineering methods and company reorganization processes and discuss how the elements of the hierarchical approach can improve XP. We provide guidelines on how to scale up XP to very large projects e.g. those common in telecommunication industry and IT technology consultancy firms by using moderation techniques., Comment: 4 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1409.6604

Published
2014

18. Scaling the Management of Extreme Programming Projects

Author

Rumpe, Bernhard and Scholz, Peter

Subjects
Computer Science - Software Engineering
Abstract

XP is a code-oriented, light-weight software engineering methodology, suited merely for small-sized teams who develop software that relies on vague or rapidly changing requirements. Being very code-oriented, the discipline of systems engineering knows it as approach of incremental system change. In this contribution, we discuss the enhanced version of a concept on how to extend XP on large scale projects with hundreds of software engineers and programmers, respectively. Previous versions were already presented in [1] and [12]. The basic idea is to apply the "hierarchical approach", a management principle of reorganizing companies, as well as well-known moderation principles to XP project organization. We show similarities between software engineering methods and company reorganization processes and discuss how the elements of the hierarchical approach can improve XP. We provide guidelines on how to scale up XP to very large projects e.g. those common in telecommunication industry and IT technology consultancy firms by using moderation techniques., Comment: 7 pages, 4 figures

Published
2014

19. PROSE: Prospective Randomized Trial of the On-X Mechanical Prosthesis and the St Jude Medical Mechanical Prosthesis Evaluation: Part 1(Patient Dynamics): Preoperative demographics and preoperative and operative risk factors

Author

Jamieson, W. R. Eric, Ely, John L., Brink, Johan, Pennel, Timothy, Bannon, Paul, Patel, Jashvant, Kumar Gupta, Rajiv, Mohan Rao, Prasanna Simha, Agrawal, Damyanti, Wiklund, Lars, Kappetein, A. Pieter, Haaverstad, Rune, Geisner, Thomas, Doenst, Torsten, Schlensak, Christian, Nair, Salgunan, Brown, Craig, Siepe, Matthias, Damiano, Ralph J., Langlois, Yves, Cherian, K. M., Azar, Hormoz, Chen, John C., Bavaria, Joseph E., Fedoruk, Lynn M., Munfakh, Nabil A., Sridhar, V., Scholz, Peter M., Pfeffer, Thomas A., and Ye, Jian

Published
2021
Full Text
View/download PDF

29. Natalizumab treatment shows low cumulative probabilities of confirmed disability worsening to EDSS milestones in the long-term setting

Author

Correale, Jorge, Caride, Alejandro, Deri, Norma H., Ballario, Carlos, Broadley, Simon, Kneebone, Chris, Barnett, Michael, Pollard, John, Hodgkinson, Suzanne, Kermode, Allan, Macdonell, Richard, King, John, Butzkueven, Helmut, Lechner-Scott, Jeannette, Saines, Noel, Slee, Mark, Plummer, Chris, Willekens, Barbara, Vanopdenbosch, Ludo, Belachew, Shibeshih, Phan-Ba, Rémy, Delvaux, Valérie, Bissay, Veronique, Debruyne, Jan, Decoo, Danny, Crols, Roeland, Symons, Anoek, Nagels, Guy, Van Pesch, Vincent, Sindic, Christian, Dubois, Benedicte, Medaer, Robert, D'Hooghe, Marie, Guillaume, Daniel, De Smet, Eric, Seeldrayers, Pierrette, Lysandropoulos, Andreas, Vokaer, Mathieu, Geens, Karine, Willems, Christina, Denayer, Pierre, Bureau, Michel, Retif, Cecile, Dupuis, Michel, Bouquiaux, Olivier, Vanderdonckt, Patrick, van Landegem, William, Caekebeke, Jo, Van Ingelghem, Erwin, Peeters, Katelijne, Gerard, Pascale, de Noordhout, Alain Maertens, Desfontaines, Philippe, Urbain, Etienne, Declercq, Inge, Van Wijmeersch, Bart, Vanroose, Erwin, Wibail, Alain, Barthomolé, Emmanuel, Ursell, Melanie, Sweet, Margaret Elizabeth, Howse, David, Jichici, Draga, Shawush, Melad, Namaka, Mike, Traboulsee, Anthony, Hashimoto, Stan, Lo, Raymond, Marchetti, Paul, Lapierre, Yves, Jacques, Francois, MacLean, Gregg, Bhan, Virender, Duquette, Pierre, Stewart, Bradley, Paulseth, John, Kremenchutzky, Marcelo, Vorobeychik, Galina, O'Connor, Paul, Grand'Maison, François, Havrdova, Eva, Meluzinová, Eva, Valis, Martin, Talab, Radomír, Stourac, Pavel, Zapletalová, Olga, Dufek, Michal, Sládková, Vladimíra, Novotna, Alena, Vancurová, Romana, Lhotaková, Libuse, Fiedler, Jiri, Vachova, Marta, Dolezil, David, Stetkarova, Ivana, Rehankova, Adela, Psenica, Petr, Ulehlova, Veronika, Feketova, Sona, Skoda, Ondrej, Färkkilä, Markus, Taneli, Sarasoja, Koivisto, Keijo, Seppä, Juha Matti, Airas, Laura, Elovaara, Irina, Hartikainen, Päivi, Pirttila, Tuula, Louchart, Pierre, Ille, Olivier, Thenint, Jean philippe, Godet, Etienne, Vioud, Marcel Maillet, Colamarino, Renato, Gugenheim, Michel, Grimaud, Jerome, Kopf, Audrey, Billy, Christophe, Huttin, Bernard, Borsotti, Jean paul, Devos, Philippe, Kendjuo, Jean bertin N, Verier, Albert, Chapuis, Stephane, Daluzeau, Nathalie, Angibaud, Gilles, Uriot, Marie-Sylvie Artaud, Ziegler, François, Sellal, François, Moulignier, Antoine, Lavenu, Isabelle, Ismail, Samir, Devy, Richard, Suceveanu, Manuel, Wagner, Marc, Marcel, Sebastien, Derouiche, Faycal, Mostoufizadehghalamfarsa, Sohrab, Delalande, Sophie, Ruggieri, Irene, Van Nieuwenhuyse, Catherine Bossu, Nifle, Chantal, Ondze, Basile, Vasilescu, Carmen Gurau, Vongsouthi, Cyrille, Coustans, Marc, Anne, Olivier, Amevigbe, Josephine, Servan, Jerome, Merienne, Marc, Eck, Philippe, Berroir, Stephane, Busson, Philippe, Barroso, Bruno, Larrieu, Jean-Marc, Giendaj, Catherine Louvet, Malkoun, Imad, Hautecoeur, Patrick, Kwiatkowski, Arnaud, Pouliquen, Andre, Garrigues, Guillaume, Delerue, Olivier, Giraud, Pierric, Gere, Julien, Vaunaize, Jean, Dereeper, Olivier, Seiller, Nicolas, Alsassa, Roger, Vlaicu, Mihaela, Neuville, Veronique, Faucheux, Jean Marc, Bernady, Patricia, Fanjaud, Guy, Viallet, François, Schroeter, Michael, Schlemilch-Paschen, Sylke, Lange, Thomas, Bohr, Kin-Arno, Jendroska, Klaus, Rehkopf, Elisabeth, Bergmann, Arnfin, Kleinschnitz, Christoph, Postert, Thomas, Scholz, Peter, Mauz, Uwe, Stratmann, Hubert, Siefjediers, Veneta, Prantl, Martin, Gehring, Klaus, Zellner, Ruth, Junge, Kathrin, Zellner, Anton, Bacay, Valerina, Schlegel, Eugen, Polzer, Udo, Strauss, Erik, Link, Andreas, Stenzel, Christoph, Freidel, Matthias, Drews, Joachim, Neudert, Christian, Schmitz, Frank, Jaeger, Joachim, Masri, Said, Heuberger, Wolfgang, Trausch, Beate, Ruhnke, Oliver, Scarel, Serena, Bach, Kathlen, Ernst, Michael, Landefeld, Harald, Richter, Nils, Schmidt, Stephan, Krause, Michaela, Dressel, Alezander, Ruth, Roland, Anvari, Kerstin, Gossling, Jens, Schenk, Christoph, Tiedge, Oliver, Bode, Lutz, Eder, Hans-Thomas, Pfeffer, Oliver, Krug, Reinhard, Lassek, Christoph, Fleischer, Eberhard, Meuth, Sven, Klotz, Luisa Hildegard, Peglau, Ines, Kukowski, Borries, Herting, Birgit, Guthke, Kersten, Schierenbeck, Jurgen, Brockmeier, Bernd, Albrecht, Holger, Wuttke, Matthias, Augspach-Hofmann, Regine, Gunther, Stefan, Redbrake, Martin, Franke, Christian, Buchner, Klaus, Gratz, Thomas, Horn, Rolf, Doemges, Frank, Schreiber, Martin, Brosch, Thomas, Horn, Markus, Kittlitz, Matthias, Vulturius, Gabriele, Hinse, Paul, Malessa, Rolf, Wiehler, Stephan, Katsarava, Zaza, Kastrup, Oliver, Kausch, Ulrich, Gullekes, Martin, Fickinger, Markus, Wenzel, Wilhelm, Botefur, Ingolf C., Reifschneider, Gerd, Rauer, Sebastian, Lang, Michael, Harms, Lutz, Eckhardt, Ulrich, Cursiefen, Simone, Linker, Ralf, Angstwurm, Klemens, Haas, Judith, Schuetze, Ivo, Rohm, Eva, Stienker-Fisse, H., Sailer, Michael, Bohringer, Johannes, Maurer, Mathias, Bause, Eberhard, Wersching, Ronald, Dachsel, Reinhardt, Domke, Sylke, Hoffman, Frank, Tackenberg, Bjorn, Roch, Kerstin, Ziebold, Uwe, Kallmann, Boris, Buehler, Bernhard, Faiss, Judith, Faiss, Juergen, Schimrigk, Sebastian, Menges, Christian, Knop, Karl Christian, Koehler, Wolfgang, Siever, Arno, Bufler, Johannes, Gramsl, Georg, Kuhnler, Benedicta, Maschke, Matthias, Stogbauer, Florian, Staude, Lisa, Bethke, Florian, Bitsch, Andreas, Harmjanz, Arndt D., Windsheimer, Jorg, Kieseier, Bernd C., Berkenfeld, Ralf, Tumani, Hayrettin, Kirsch, Michael, Wildemann, Brigitte, Daniels, Regina, Gottwald, Klaus, Elias, Wolfgang-Gerhard, Hoffmann, Olaf, Schwab, Matthias, Pilz, Christopher, Klostermann, Fabian, Hellwig, Kerstin, Berthele, Achim, Bayas, Antonios, Molitor, Daniel, Grothe, Christoph, Wagner, Bert, Karageorgiou, Klimentini, Mitsikostas, Dimosthenis, Kodounis, Antonios, Plaitakis, Andreas, Papadimitriou, Alexandros, Grigoriadis, Nikolaos, Vlaikidis, Nikolaos, Koutlas, Evaggelos, Kyritsis, Athanassios, Papathanassopoulos, Panagiotis, Makris, Nikolaos, Tavernarakis, Antonios, Scarpini, Elio, Montanari, Enrico, Marrosu, Maria Giovanna, Trojano, Maria, Amato, Maria Pia, Rottoli, Mariarosa, Lugaresi, Alessandra, Florio, Ciro, Gasperini, Claudio, Grimaldi, Luigi, Millefiorini, Enrico, Koudriavtseva, Tatiana, Perla, Franco, Mantegazza, Renato, Bertolotto, Antonio, Ghezzi, Angelo, Aguilar, Sandra Quinones, Eisenberg, Eli Skromne, Lopez, Leondardo Llamas, Estudillo, Rocio Marquez, Schrijver, H.M., Wittebol, M.C., Baart, J.C., van Golde, A.E.L., Hengstman, G.J.D., Pop, P.H.M., Bos (Geldrop), M., Medaer, R., Schyns-Soeterboek, Angelique, van der Zwart, A., van Diepen, A.J.H., Verheul, G.A.M., Verhagen, W.I.M., Bos (Helmond), M., Witjes, R.J.G.M., Sinnige, L.G.F., van Munster, E.Th.L., Sanders, E.A.C.M., van Dijl, Ron, Hupperts, R.M.M., Frequin, S.T.F.M., Visser, L.H., Henselmans, J.M.L., Moll, J.W.B., Midgard, Rune, Myhr, Kjell Morten, Edland, Astrid, Telstad, Wenche, Hognestad, Tone, Lund, Christian, Hovdal, Harald, Kamaljit, Kaur, Schepel, Jan, Hogenesch, Roelfien Ida, Schüler, Stephan, Odeh, Francis, Alstadhaug, Karl B., Korsgaard, Olav, Farbu, Elisabeth, Ingvaldsen, Teis Barclay, Soares (SCO), Diana, Rente, José, Guerra, José Manuel Costa, Morganho, Armando, Leitão, António, de Sá, João, Sá, Maria José, Marques, Pinto, Veloso, Mário, Baptista, Miguel Viana, Szilasiová, Jarmila, Copikova-Cudrakova, Daniela, Prochazkova, Lubica, Klimová, Eleonóra, Donath, Vladimir, Brozman, Miroslav, Ramo, Cristina, Ruiz, Domingo Pérez, Hernández, Carmen Calles, Sola, María Eugenia Marzo, Moro, Roberto Suarez, Vidal, Jose Antonio, Rodríguez, Ana Belén Caminero, Ozaeta, Gisela Martin, Nadal, Jordi Batlle, Esquide, Amaya Alvarez de Arcaya, Urtaza, Javier Olascoaga, Martínez-Yélamos, Sergio, Arbizu, Txomin, Torrenta, Lluis Ramio i, Boggild, Mike, Wilson, Martin, Al-Araji, Adnan, Nicholas, Richard, Harrower, Timothy, Redmond, Ian, Wolf, Tilo, Osei-Bonsu, Michael, Mazibrada, Gordon, Rog, David, Cottrell, David, Constantinescu, Cris, Gray, Orla, Belhag, Mohamed, Shehu, Abdullah, Rashid, Waqar, Duddy, Martin, Kappos, Ludwig, Wiendl, Heinz, Spelman, Tim, Pellegrini, Fabio, Chen, Yi, Dong, Qunming, and Koendgen, Harold

Published
2018
Full Text
View/download PDF

31. Performance of tungsten plasma facing components in the stellarator experiment W7-X: recent results from the first OP2 campaign

Author

Naujoks, Dirk, primary, Dhard, Chandra-Prakash, additional, Feng, Yuhe, additional, Gao, Yu, additional, Stange, Torsten, additional, Buttenschön, Birger, additional, Bozhenkov, Sergey A., additional, Brezinsek, Sebastijan, additional, Jakob Brunner, Kai, additional, Cseh, Gábor, additional, Dinklage, Andreas, additional, Ennis, David, additional, Fellinger, Joris, additional, Flom, Eric, additional, Gradic, Dorothea, additional, Grigore, Eduard, additional, Hartmann, Dirk, additional, Henke, Frederik, additional, Jakubowski, Marcin, additional, Kharwandikar, Amit, additional, Khokhlov, Mikhail, additional, Knauer, Jens, additional, Kocsis, Gábor, additional, Kornejew, Petra, additional, Krychowiak, Maciej, additional, Mayer, Matej, additional, McNeely, Paul, additional, Medina, Daniel, additional, Neu, Rudolf, additional, Rahbarnia, Kian, additional, Ruset, Cristian, additional, Rust, Norbert, additional, Scholz, Peter, additional, Sieber, Thomas, additional, Stepanov, Ivan, additional, Tamura, Naoki, additional, Wang, Erhui, additional, Wegner, Thomas, additional, and Zhang, Daihong, additional

Published
2023
Full Text
View/download PDF

33. Flow Field Analysis of a Detailed Road Vehicle Model Based on Numerical Data

Author

Placzek, Robin, Scholz, Peter, Boersma, Bendiks Jan, Series editor, Fujii, Kozo, Series editor, Haase, Werner, Series editor, Leschziner, Michael A., Series editor, Periaux, Jacques, Series editor, Pirozzoli, Sergio, Series editor, Rizzi, Arthur, Series editor, Roux, Bernard, Series editor, Shokin, Yurii I., Series editor, Dillmann, Andreas, editor, Heller, Gerd, editor, Krämer, Ewald, editor, Wagner, Claus, editor, and Breitsamter, Christian, editor

Published
2016
Full Text
View/download PDF

34. Interaction of Three-Dimensional Disturbances with the Flow Around a Two-Element High-Lift Airfoil

Author

Klein, Simon, Scholz, Peter, Radespiel, Rolf, Boersma, Bendiks Jan, Series editor, Fujii, Kozo, Series editor, Haase, Werner, Series editor, Leschziner, Michael A., Series editor, Periaux, Jacques, Series editor, Pirozzoli, Sergio, Series editor, Rizzi, Arthur, Series editor, Roux, Bernard, Series editor, Shokin, Yurii I., Series editor, Radespiel, Rolf, editor, Niehuis, Reinhard, editor, Kroll, Norbert, editor, and Behrends, Kathrin, editor

Published
2016
Full Text
View/download PDF

43. THE COST OF MISINFORMATION

Author

Scholz, Peter

Subjects
General interest, News, opinion and commentary
Abstract

I am astounded by the lies that can be spread without consequences ('The next virus,' February 2022). Shanon Sheppard of Halifax should be criminally charged for causing death. There must [...]

Published
2022

44. Aerodynamic Effects of Tip Tanks on a Swept Wing Wind-Tunnel Model

Author

Hühne, Claus-Philipp, Scholz, Peter, Radespiel, Rolf, Boersma, Bendiks Jan, Series editor, Fujii, Kozo, Series editor, Haase, Werner, Series editor, Leschziner, Michael A., Series editor, Periaux, Jacques, Series editor, Pirozzoli, Sergio, Series editor, Rizzi, Arthur, Series editor, Roux, Bernard, Series editor, Shokin, Yurii I., Series editor, Dillmann, Andreas, editor, Heller, Gerd, editor, Krämer, Ewald, editor, Kreplin, Hans-Peter, editor, Nitsche, Wolfgang, editor, and Rist, Ulrich, editor

Published
2014
Full Text
View/download PDF

49. Measurements on the Effect of Steps on the Transition of Laminar Boundary Layers

Author

Heintz, Alexander and Scholz, Peter

Subjects
stability theory, Fluid Flow and Transfer Processes, Mechanics of Materials, Boundary Layer, Computational Mechanics, General Physics and Astronomy, Forward and Backward Facing Steps, Roughness, Laminar-Turbulent Transition, Transition prediction
Abstract

The effects of steps on the transition of laminar boundary layers were measured on a flat plate for low Reynolds numbers with critical and subcritical step heights. The transition position was measured by determining the intermittency distribution in streamwise direction, including the characteristic length of the transitional region. The results are compared with formulations of a critical step Reynolds number $${\textrm{Re}_\textrm{h}}$$ Re h , i.e., the step height that will instantly trigger transition at the step position, and—for subcritical step heights—with $${{\Delta N}}$$ Δ N -formulations from the literature. For backward-facing steps, the concept of a step Reynolds number can be used to distinguish between subcritical and critical step heights, whereas for forward-facing steps there seems not to be one unique $${\textrm{Re}_\textrm{h}}$$ Re h . Furthermore, for subcritical backward-facing steps the concept of a $${{\Delta N}}$$ Δ N -approximation gives a reasonable description of the experimental observations. Again in contrast, for forward-facing steps a $${{\Delta N}}$$ Δ N -approach scattered a lot and no clear dependency was found between the reduction in the critical N-factor of transition and the relative step height.

Published
2022
Full Text
View/download PDF

50. Connecting IndExs Editors and exsiccata IDs with Wikidata for Disambiguation of People Names and Work in Botanical and Mycological Collections

Author

Triebel, Dagmar, Uribe-Holguin, Camila, Seifert, Stefan, Weiss, Markus, and Scholz, Peter

Subjects
General Medicine, linked data, external identifiers
Abstract

"IndExs—Index of Exsiccatae" is an online database with bibliographic information on exsiccatae and exsiccata-like series launched in 2001 (Triebel and Scholz 2022). This type of series is a specific system in botany and mycology to create, publish and distribute well identified and documented reference material. In most cases the distributed specimens are numbered and each number consists of uniform material (herbarium duplicates) from a single collection event. Exsiccatal series are regularily published with small booklets containing the printed labels/ schedae of each numbered entity. The title of the series often shows the geographic and taxonomic focus of the series, e.g., "Delogne & Gravet, Hépat. Ardenne" and "Hertel, Lecideaceae Exs.". The persons editing the series are specialists, often recognized botanists and taxonomists. They are mostly not identical with the persons collecting and identifying the specimens distributed. Examples are E. M. Fries with "Fries, Herb. Norm. Pl. Suec.", G. L. Rabenhorst who published 24 series with more than 6,000 numbered entities and K. H. Rechinger with "Rechinger & Polunin, Exs. Herb. Baghdad". In the minority of cases the editors are anonymous persons and organisations devoted to plant exchange like "Société Dauphinoise pour l'échange des plantes". The more than 2.200 known series are widely distributed in public herbaria, either kept separately or integrated in the main collection. We estimate that more than 10 million specimens belong to such a series with printed labels. Approximately 70 series are running. The eldest exsiccata might be that of Johann Balthasar Ehrhart (from 1732 see here). It is followed by the better known exsiccatae edited by Jakob Friedrich Ehrhart, e.g., the series "Ehrhart, Pl. Crypt. Linn." starting with 1785. The two newest series started in 2020 and are bryophyte series from Taiwan and Vietnam. The online database IndExs categorizes the series according to the group of organisms distributed and delivers editors, full title, standard abbreviation, editing institution, place of publication, range of (suggested) publication dates, range of numbered entities, examplary images of printed label as well as information sources and literature (Triebel et al. 2004). A stable and persistent exsiccata identifier, so-called "IndExs Exsiccata ID" is given. This set of standardized information is available via the IndExs search interface, and ready to be downloaded via several formats (csv, xls, xml). A machine readable REST web service is under development. IndExs information and services with stable IndExs Exsiccata ID are used by data portals like the Macroalgal Herbarium Consortium Portal powered by Symbiota, the JACQ herbarium management system and integrated in collection management systems like DiversityCollection, a module of the Diversity Workbench (DWB) tool suite. It is envisaged to be included in future terminology services like the GFBio Terminology Service. IndExs is appropriate to build the curated reference list for exsiccatae in the frame of herbarium digitization approaches (Borsch et al. 2020). IndExs is storing information on the work of 1,300 editors of exsiccatae who are persons from nearly 300 years. According to the data models of DiversityAgents (Weiss et al. 2016) and DiversityExsiccatae (Hagedorn et al. 2008) the information is managed in freely accessible interlinked instances of SQL RDBMS DiversityAgents and DiversityExsiccatae. The applications are installed as part of the data network at the SNSB IT Center. In 2012, the Wikidata project started and acts as central storage for the structured data of its Wikimedia sister projects (Anonymous 2022, Vrandečić and Krötzsch 2014). The content of Wikidata is available under a free license, exported using standard formats, and can be interlinked to other open data sets on the linked data web including life sciences (Anonymous 2022, Mitraka et al. 2015). The study will use existing IndExs services for the 1,300 IndExs editors and 2,200 disambiguated exsiccata series and expand them for linked data / semantic web approaches. It will explore the usability of Wikidata: for disambiguation of person names (=editors) in IndExs by adapting Wikidata Identifiers, for adding information to existing Wikidata person Q-entities (items) via statements on persons´ work, for integrating IndExs information in Wikidata with URI for "IndExs Exsiccata ID" via a newly proposed P-entity (property) for this special kind of creative work in natural science, for adding new Q-entities in Wikidata for IndExs editors. for disambiguation of person names (=editors) in IndExs by adapting Wikidata Identifiers, for adding information to existing Wikidata person Q-entities (items) via statements on persons´ work, for integrating IndExs information in Wikidata with URI for "IndExs Exsiccata ID" via a newly proposed P-entity (property) for this special kind of creative work in natural science, for adding new Q-entities in Wikidata for IndExs editors. These editors of published booklet series with distributed physical material fulfill the Wikidata criteria of notability. They are often more or less well-known botanists and mycologists. By their published work they might even more fulfill the criteria than certain persons categorized as botanical collectors with assignment of a Wikidata ID through activities of CETAF, DiSSCo and COST MOBILISE.

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results