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2,093 results on '"Thiel, Christian"'

2. A

Author

Gabriel, Gottfried, Gatzemeier, Matthias, Gethmann, Carl F., Janich, Peter, Kambartel, Friedrich, Lorenz, Kuno, Mainzer, Klaus, Schroeder-Heister, Peter, Thiel, Christian, Wimmer, Reiner, Carrier, Martin, Gabriel, Gottfried, Gatzemeier, Matthias, Gethmann, Carl F., Janich, Peter, Kambartel, Friedrich, Lorenz, Kuno, Mainzer, Klaus, Schroeder-Heister, Peter, Thiel, Christian, Wimmer, Reiner, Carrier, Martin, and Mittelstraß, Jürgen, editor

Published
2024
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3. B

Author

Gabriel, Gottfried, Gatzemeier, Matthias, Gethmann, Carl F., Janich, Peter, Kambartel, Friedrich, Lorenz, Kuno, Mainzer, Klaus, Schroeder-Heister, Peter, Thiel, Christian, Wimmer, Reiner, Carrier, Martin, Gabriel, Gottfried, Gatzemeier, Matthias, Gethmann, Carl F., Janich, Peter, Kambartel, Friedrich, Lorenz, Kuno, Mainzer, Klaus, Schroeder-Heister, Peter, Thiel, Christian, Wimmer, Reiner, Carrier, Martin, and Mittelstraß, Jürgen, editor

Published
2024
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6. Dominantly acting variants in ATP6V1C1 and ATP6V1B2 cause a multisystem phenotypic spectrum by altering lysosomal and/or autophagosome function

Author

Carpentieri, Giovanna, Cecchetti, Serena, Bocchinfuso, Gianfranco, Radio, Francesca Clementina, Leoni, Chiara, Onesimo, Roberta, Calligari, Paolo, Pietrantoni, Agostina, Ciolfi, Andrea, Ferilli, Marco, Calderan, Cristina, Cappuccio, Gerarda, Martinelli, Simone, Messina, Elena, Caputo, Viviana, Hüffmeier, Ulrike, Mignot, Cyril, Auvin, Stéphane, Capri, Yline, Lourenco, Charles Marques, Russell, Bianca E., Neustad, Ahna, Brunetti Pierri, Nicola, Keren, Boris, Reis, André, Cohen, Julie S., Heidlebaugh, Alexis, Smith, Clay, Thiel, Christian T., Salviati, Leonardo, Zampino, Giuseppe, Campeau, Philippe M., Stella, Lorenzo, Tartaglia, Marco, and Flex, Elisabetta

Published
2024
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7. Enzyklopädie Philosophie und Wissenschaftstheorie

Author

Gabriel, Gottfried, primary, Gatzemeier, Matthias, additional, Gethmann, Carl F., additional, Janich, Peter, additional, Kambartel, Friedrich, additional, Lorenz, Kuno, additional, Mainzer, Klaus, additional, Schroeder-Heister, Peter, additional, Thiel, Christian, additional, Wimmer, Reiner, additional, and Carrier, Martin, additional

Published
2024
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9. Trainingssteuerung

Author

Wiemeyer, Josef, Bernardi, Andreas, Thiel, Christian, Banzer, Winfried, Oertel, Viola, editor, and Hänsel, Frank, editor

Published
2023
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11. Smartphone-assisted training with education for patients with hip and/or knee osteoarthritis (SmArt-E): study protocol for a multicentre pragmatic randomized controlled trial

Author

Weber, Franziska, Müller, Carsten, Bahns, Carolin, Kopkow, Christian, Färber, Francesca, Gellert, Paul, Otte, Ina, Vollmar, Horst Christian, Brannath, Werner, Diederich, Freya, Kloep, Stephan, Rothgang, Heinz, Dieter, Valerie, Krauß, Inga, Kloek, Corelien, Veenhof, Cindy, Collisi, Sandra, Repschläger, Ute, Böbinger, Hannes, Grüneberg, Christian, Thiel, Christian, and Peschke, Dirk

Published
2023
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12. Citizen science’s transformative impact on science, citizen empowerment and socio-political processes

Author

von Gönner, Julia, Herrmann, Thora M., Bruckermann, Till, Eichinger, Michael, Hecker, Susanne, Klan, Friederike, Lorke, Julia, Richter, Anett, Sturm, Ulrike, Voigt-Heucke, Silke, Brink, Wiebke, Liedtke, Christin, Premke-Kraus, Matthias, Altmann, Carolin, Bauhus, Wilhelm, Bengtsson, Luiza, Büermann, Andrea, Dietrich, Peter, Dörler, Daniel, Eich-Brod, Regina, Ferschinger, Laura, Freyberg, Linda, Grützner, Agnes, Hammel, Gertrud, Heigl, Florian, Heyen, Nils B., Hölker, Franz, Johannsen, Carolin, Kluß, Thorsten, Kluttig, Thekla, Knobloch, Jörn, Munke, Martin, Mortega, Kim, Pathe, Carsten, Soßdorf, Anna, Stämpfli, Tiina, Thiel, Christian, Tönsmann, Susanne, Valentin, Anke, Wagenknecht, Katherin, Wegener, Robert, Woll, Silvia, and Bonn, Aletta

Published
2023
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18. Do we need Truesdell's empirical inequalities? On the coaxiality of stress and stretch

Author

Thiel, Christian, Voss, Jendrik, Martin, Robert J., and Neff, Patrizio

Subjects
Mathematics - Analysis of PDEs, 74B20, 74A20, 74A10
Abstract

Truesdell's empirical inequalities are considered essential in various fields of nonlinear elasticity. However, they are often used merely as a sufficient criterion for semi-invertibility of the isotropic stress strain-relation, even though weaker and much less restricting constitutive requirements like the strict Baker-Ericksen inequalities are available for this purpose. We elaborate the relations between such constitutive conditions, including a weakened version of the empirical inequalities, and their connection to bi-coaxiality and related matrix properties. In particular, we discuss a number of issues arising from the seemingly ubiquitous use of the phrase "$X,Y$ have the same eigenvectors" when referring to commuting symmetric tensors $X,Y$.

Published
2018
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19. Shear, pure and simple

Author

Thiel, Christian, Voss, Jendrik, Martin, Robert J., and Neff, Patrizio

Subjects
Mathematics - Analysis of PDEs, 74B20, 74A20, 74A10
Abstract

In a 2012 article in the International Journal of Non-Linear Mechanics, Destrade et al. showed that for nonlinear elastic materials satisfying Truesdell's so-called empirical inequalities, the deformation corresponding to a Cauchy pure shear stress is not a simple shear. Similar results can be found in a 2011 article of L. A. Mihai and A. Goriely. We confirm their results under weakened assumptions and consider the case of a shear load, i.e. a Biot pure shear stress. In addition, conditions under which Cauchy pure shear stresses correspond to (idealized) pure shear stretch tensors are stated and a new notion of idealized finite simple shear is introduced, showing that for certain classes of nonlinear materials, the results by Destrade et al. can be simplified considerably.

Published
2018
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20. Evolution of 1500-m Olympic Running Performance.

Author

Foster, Carl, Hanley, Brian, Barroso, Renato, Boullosa, Daniel, Casado, Arturo, Haugen, Thomas, Hettinga, Florentina J., Jones, Andrew M., Renfree, Andrew, Skiba, Philip, St Clair Gibson, Alan, Thiel, Christian, and de Koning, Jos J.

Subjects
TRACK & field, RUNNING, EXERCISE physiology, PHYSICAL training & conditioning, SPORTS events, ATHLETIC ability, GROUND reaction forces (Biomechanics)
Abstract

Purpose: This study determined the evolution of performance and pacing for each winner of the men's Olympic 1500-m running track final from 1924 to 2020. Methods: Data were obtained from publicly available sources. When official splits were unavailable, times from sources such as YouTube were included and interpolated from video records. Final times, lap splits, and position in the peloton were included. The data are presented relative to 0 to 400 m, 400 to 800 m, 800 to 1200 m, and 1200 to 1500 m. Critical speed and D′ were calculated using athletes' season's best times. Results: Performance improved ∼25 seconds from 1924 to 2020, with most improvement (∼19 s) occurring in the first 10 finals. However, only 2 performances were world records, and only one runner won the event twice. Pacing evolved from a fast start–slow middle–fast finish pattern (reverse J-shaped) to a slower start with steady acceleration in the second half (J-shaped). The coefficient of variation for lap speeds ranged from 1.4% to 15.3%, consistent with a highly tactical pacing pattern. With few exceptions, the eventual winners were near the front throughout, although rarely in the leading position. There is evidence of a general increase in both critical speed and D′ that parallels performance. Conclusions: An evolution in the pacing pattern occurred across several "eras" in the history of Olympic 1500-m racing, consistent with better trained athletes and improved technology. There has been a consistent tactical approach of following opponents until the latter stages, and athletes should develop tactical flexibility, related to their critical speed and D′, in planning prerace strategy. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Bewegungsversorgung im deutschen Gesundheitssystem: gesundheitspolitische Relevanz und notwendige Rahmenbedingungen – ein Positionspapier der AG Bewegungsbezogene Versorgungsforschung des DNVF.

Author

Schaller, Andrea, Thiel, Christian, Peters, Stefan, Geidl, Wolfgang, Sarah, Klamroth, Lange, Martin, Kastaun, Sabrina, Krupp, Sonja, Spaderna, Heike, Eckert, Katharina, Grafe, Marion, Voelcker-Rehage, Claudia, Nellessen-Martens, Gisela, Pfeifer, Klaus, Sudeck, Gorden, Wiskemann, Joachim, Wollesen, Bettina, and Gabrys, Lars

Published
2025
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26. Mapping Habitat Structures of Endangered Open Grassland Species (E. aurinia) Using a Biotope Classification Based on Very High-Resolution Imagery.

Author

Dietenberger, Steffen, Mueller, Marlin M., Henkel, Andreas, Dubois, Clémence, Thiel, Christian, and Hese, Sören

Subjects
CONVOLUTIONAL neural networks, DEEP learning, RANDOM forest algorithms, REMOTE sensing, ENDANGERED species, GRASSLANDS
Abstract

Analyzing habitat conditions and mapping habitat structures are crucial for monitoring ecosystems and implementing effective conservation measures, especially in the context of declining open grassland ecosystems in Europe. The marsh fritillary (Euphydryas aurinia), an endangered butterfly species, depends heavily on specific habitat conditions found in these grasslands, making it vulnerable to environmental changes. To address this, we conducted a comprehensive habitat suitability analysis within the Hainich National Park in Thuringia, Germany, leveraging very high-resolution (VHR) airborne, red-green-blue (RGB), and color-infrared (CIR) remote sensing data and deep learning techniques. We generated habitat suitability models (HSM) to gain insights into the spatial factors influencing the occurrence of E. aurinia and to predict potential habitat suitability for the whole study site. Through a deep learning classification technique, we conducted biotope mapping and generated fine-scale spatial variables to model habitat suitability. By employing various modeling techniques, including Generalized Additive Models (GAM), Generalized Linear Models (GLM), and Random Forest (RF), we assessed the influence of different modeling parameters and pseudo-absence (PA) data generation on model performance. The biotope mapping achieved an overall accuracy of 81.8%, while the subsequent HSMs yielded accuracies ranging from 0.69 to 0.75, with RF showing slightly better performance. The models agree that homogeneous grasslands, paths, hedges, and areas with dense bush encroachment are unsuitable habitats, but they differ in their identification of high-suitability areas. Shrub proximity and density were identified as important factors influencing the occurrence of E. aurinia. Our findings underscore the critical role of human intervention in preserving habitat suitability, particularly in mitigating the adverse effects of natural succession dominated by shrubs and trees. Furthermore, our approach demonstrates the potential of VHR remote sensing data in mapping small-scale butterfly habitats, offering applicability to habitat mapping for various other species. [ABSTRACT FROM AUTHOR]

Published
2025
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43. Active site variants in STT3A cause a dominant type I congenital disorder of glycosylation with neuromusculoskeletal findings

Author

Wilson, Matthew P., Garanto, Alejandro, Pinto e Vairo, Filippo, Ng, Bobby G., Ranatunga, Wasantha K., Ventouratou, Marina, Baerenfaenger, Melissa, Huijben, Karin, Thiel, Christian, Ashikov, Angel, Keldermans, Liesbeth, Souche, Erika, Vuillaumier-Barrot, Sandrine, Dupré, Thierry, Michelakakis, Helen, Fiumara, Agata, Pitt, James, White, Susan M., Lim, Sze Chern, Gallacher, Lyndon, Peters, Heidi, Rymen, Daisy, Witters, Peter, Ribes, Antonia, Morales-Romero, Blai, Rodríguez-Palmero, Agustí, Ballhausen, Diana, de Lonlay, Pascale, Barone, Rita, Janssen, Mirian C.H., Jaeken, Jaak, Freeze, Hudson H., Matthijs, Gert, Morava, Eva, and Lefeber, Dirk J.

Published
2021
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47. A multifactorial interdisciplinary intervention to prevent functional and mobility decline for more participation in (pre-)frail community-dwelling older adults (PromeTheus): study protocol for a multicenter randomized controlled trial

Author

Werner, Christian, Wolf-Belala, Nacera, Nerz, Corinna, Abel, Bastian, Braun, Tobias, Grüneberg, Christian, Thiel, Christian, Büchele, Gisela, Muche, Reiner, Hendlmeier, Ingrid, Schäufele, Martina, Dams, Judith, König, Hans-Helmut, Bauer, Jürgen M., Denkinger, Michael, and Rapp, Kilian

Published
2022
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49. On the convexity of nonlinear elastic energies in the right Cauchy-Green tensor

Author

Gao, David Yang, Neff, Patrizio, Roventa, Ionel, and Thiel, Christian

Subjects
Mathematics - Analysis of PDEs
Abstract

We present a sufficient condition under which a weak solution of the Euler-Lagrange equations in nonlinear elasticity is already a global minimizer of the corresponding elastic energy functional. This criterion is applicable to energies $W(F)=\widehat{W}(F^TF)=\widehat{W}(C)$ which are convex with respect to the right Cauchy-Green tensor $C=F^TF$, where $F$ denotes the gradient of deformation. Examples of such energies exhibiting a blow up for $\det F\to0$ are given.

Published
2015

50. The sum of squared logarithms inequality in arbitrary dimensions

Author

Borisov, Lev, Neff, Patrizio, Sra, Suvrit, and Thiel, Christian

Subjects
Mathematics - Classical Analysis and ODEs, 26D05, 26D07, 30C15, 97H20
Abstract

We prove the \emph{sum of squared logarithms inequality} (SSLI) which states that for nonnegative vectors $x, y \in \mathbb{R}^n$ whose elementary symmetric polynomials satisfy $e_k(x)\le e_k(y)$ (for $1\le k < n$) and $e_n(x)=e_n(y)$, the inequality $\sum_i (\log x_i)^2 \le \sum_i (\log y_i)^2$ holds. Our proof of this inequality follows by a suitable extension to the complex plane. In particular, we show that the function $f\colon M\subseteq \mathbb{C}^n\to \mathbb{R}$ with $f(z)=\sum_i(\log z_i)^2$ has nonnegative partial derivatives with respect to the elementary symmetric polynomials of $z$. This property leads to our proof. We conclude by providing applications and wider connections of the SSLI.

Published
2015

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