https://puma.ub.uni-stuttgart.de/group/simtech/DynamicPUMA RSS feed for /group/simtech/Dynamic2026-04-21T18:53:29+02:00https://puma.ub.uni-stuttgart.de/bibtex/21c09ad3a57d45986105107c77d0da5cf/inspo5inspo52024-07-05T14:59:56+02:003d image fibres shape muscle deformation processing contraction dynamic movement ultrasound <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Annika S. Sahrmann" itemprop="url" href="/person/1539e1f9768e937f368f3546f4de55813/author/0"><span itemprop="name">A. Sahrmann</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Lukas Vosse" itemprop="url" href="/person/1539e1f9768e937f368f3546f4de55813/author/1"><span itemprop="name">L. Vosse</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tobias Siebert" itemprop="url" href="/person/1539e1f9768e937f368f3546f4de55813/author/2"><span itemprop="name">T. Siebert</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Geoffrey G. Handsfield" itemprop="url" href="/person/1539e1f9768e937f368f3546f4de55813/author/3"><span itemprop="name">G. Handsfield</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Oliver Röhrle" itemprop="url" href="/person/1539e1f9768e937f368f3546f4de55813/author/4"><span itemprop="name">O. Röhrle</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Frontiers in Bioengineering and Biotechnology</span>, </em> </span>(<em><span>2024<meta content="2024" itemprop="datePublished"/></span></em>)</span>Fri Jul 05 14:59:56 CEST 2024Frontiers in Bioengineering and BiotechnologyDetermination of muscle shape deformations of the tibialis anterior during dynamic contractions using 3D ultrasound1220243d image fibres shape muscle deformation processing contraction dynamic movement ultrasound https://puma.ub.uni-stuttgart.de/bibtex/21947549f0f7295e064e79f467f085d7b/inspo5inspo52024-06-05T15:26:27+02:003D image muscle deformation processing contraction dynamic movement ultrasound <span data-person-type="editor" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="editor"><a title="Tobias Siebert" itemprop="url" href="/person/1277676c63d8a348032cb6102b6abeb37/editor/0"><span itemprop="name">T. Siebert</span></a></span></span> (Eds.) </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Frontiers in Bioengineering and Biotechnology</span>, </em> </span>(<em><span>June 2024<meta content="June 2024" itemprop="datePublished"/></span></em>)</span>Wed Jun 05 15:26:27 CEST 2024Frontiers in Bioengineering and Biotechnology06Determination of muscle shape deformations of the tibialis anterior during dynamic contractions using 3D ultrasound. Front. Bioeng. Biotechnol. 12:1388907. 1220243D image muscle deformation processing contraction dynamic movement ultrasound Purpose: In this paper, we introduce a novel method for determining 3D deformations of the human tibialis anterior (TA) muscle during dynamic movements using 3D ultrasound. Materials and Methods: An existing automated 3D ultrasound system is used for data acquisition, which consists of three moveable axes, along which the probe can move. While the subjects perform continuous plantar- and dorsiflexion movements in two different controlled velocities, the ultrasound probe sweeps cyclically from the ankle to the knee along the anterior shin. The ankle joint angle can be determined using reflective motion capture markers. Since we considered the movement direction of the foot, i.e., active or passive TA, four conditions occur: slow active, slow passive, fast active, fast passive. By employing an algorithm which defines ankle joint angle intervals, i.e., intervals of range of motion (ROM), 3D images of the volumes during movement can be reconstructed. Results: We found constant muscle volumes between different muscle lengths, i.e., ROM intervals. The results show an increase in mean cross-sectional area (CSA) for TA muscle shortening. Furthermore, a shift in maximum CSA towards the proximal side of the muscle could be observed for muscle shortening. We found significantly different maximum CSA values between the fast active and all other conditions, which might be caused by higher muscle activation due to the faster velocity. Conclusion: In summary, we present a method for determining muscle volume deformation during dynamic contraction using ultrasound, which will enable future empirical studies and 3D computational models of skeletal muscles.https://puma.ub.uni-stuttgart.de/bibtex/2fd36e7e13c488bf8e769fe41bed60dc3/inspo5inspo52022-07-19T11:10:29+02:00Longitudinal femoris functions muscle rectus intramuscular dynamic human sequencing <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Christoph von Laßberg" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/0"><span itemprop="name">C. von Laßberg</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Julia A. Schneid" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/1"><span itemprop="name">J. Schneid</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Dominik Graf" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/2"><span itemprop="name">D. Graf</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Felix Finger" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/3"><span itemprop="name">F. Finger</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Walter Rapp" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/4"><span itemprop="name">W. Rapp</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Norman Stutzig" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/5"><span itemprop="name">N. Stutzig</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">PLOS ONE</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">12 </span></span>(<span itemprop="issueNumber">8</span>): <span itemprop="pagination">1-23</span></em> </span>(<em><span>August 2017<meta content="August 2017" itemprop="datePublished"/></span></em>)</span>Tue Jul 19 11:10:29 CEST 2022PLOS ONE0881-23Longitudinal sequencing in intramuscular coordination: A new hypothesis of dynamic functions in the human rectus femoris muscle122017Longitudinal femoris functions muscle rectus intramuscular dynamic human sequencing The punctum fixum-punctum mobile model has been introduced in previous publications. It describes general principles of intersegmental neuromuscular succession patterns to most efficiently generate specific movement intentions. The general hypothesis of this study is that these principles—if they really do indicate a fundamental basis for efficient movement generation—should also be found in intramuscular coordination and should be indicated by “longitudinal sequencing” between fibers according to the principles of the punctum fixum-punctum mobile model. Based on this general hypothesis an operationalized model was developed for the rectus femoris muscle (RF), to exemplarily scrutinize this hypothesis for the RF. Electromyography was performed for 14 healthy male participants by using two intramuscular fine wire electrodes in the RF (placed proximal and distal), three surface electrodes over the RF (placed proximal, middle, and distal), and two surface electrodes over the antagonists (m. biceps femoris and m. semitendinosus). Three movement tasks were measured: kicking movements; deceleration after sprints; and passively induced backward accelerations of the leg. The results suggest that proximal fibers can be activated independently from distal fibers within the RF. Further, it was shown that the hypothesized function of “intramuscular longitudinal sequencing” does exist during dynamic movements. According to the punctum fixum-punctum mobile model, the activation succession between fibers changes direction (from proximal to distal or inversely) depending on the intentional context. Thus, the results seem to support the general hypothesis for the RF and could be principally in line with the operationalized “inter-fiber to tendon interaction model”.https://puma.ub.uni-stuttgart.de/bibtex/220aac70d92fb99729b91ffe1c3adb342/inspo5inspo52022-07-19T11:10:29+02:00Motion Myofascial Dynamic of Range Static Stretching <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tobias Siebert" itemprop="url" href="/person/1998f4bb115946256f369303b1f4fc79c/author/0"><span itemprop="name">T. Siebert</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Lars Donath" itemprop="url" href="/person/1998f4bb115946256f369303b1f4fc79c/author/1"><span itemprop="name">L. Donath</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mischa Borsdorf" itemprop="url" href="/person/1998f4bb115946256f369303b1f4fc79c/author/2"><span itemprop="name">M. Borsdorf</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Norman Stutzig" itemprop="url" href="/person/1998f4bb115946256f369303b1f4fc79c/author/3"><span itemprop="name">N. Stutzig</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Journal of Strength and Conditioning Research</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">36 </span></span>(<span itemprop="issueNumber">3</span>): <span itemprop="pagination">680--685</span></em> </span>(<em><span>February 2022<meta content="February 2022" itemprop="datePublished"/></span></em>)</span>Tue Jul 19 11:10:29 CEST 2022Journal of Strength and Conditioning Research023680--685Effect of Static Stretching, Dynamic Stretching, and Myofascial Foam Rolling on Range of Motion During Hip Flexion: A Randomized Crossover Trial362022Motion Myofascial Dynamic of Range Static Stretching https://puma.ub.uni-stuttgart.de/bibtex/250eb44f91950357cf988eb9394027e14/carsten.scherercarsten.scherer2021-12-07T20:40:52+01:00robust multiobjective synthesis control imng feasibility h-infinity inequalities bilinear algorithms formulas linear-systems global h-2 matrix uncertainty output-feedback optimization design parameter peerReviewed lmis structured dynamic order <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. Kanev" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/0"><span itemprop="name">S. Kanev</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="C. W. Scherer" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/1"><span itemprop="name">C. Scherer</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="M. Verhaegen" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/2"><span itemprop="name">M. Verhaegen</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="B. De Schutter" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/3"><span itemprop="name">B. De Schutter</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Automatica</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">40 </span></span>(<span itemprop="issueNumber">7</span>): <span itemprop="pagination">1115-1127</span></em> </span>(<em><span>July 2004<meta content="July 2004" itemprop="datePublished"/></span></em>)</span>Tue Dec 07 20:40:52 CET 2021Automatica0771115-1127{R}obust output-feedback controller design via local {BMI} optimization402004robust multiobjective synthesis control imng feasibility h-infinity inequalities bilinear algorithms formulas linear-systems global h-2 matrix uncertainty output-feedback optimization design parameter peerReviewed lmis structured dynamic order The problem of designing a globally optimal full-order output-feedback controller for polytopic uncertain systems is known to be a non-convex NP-hard optimization problem, that can be represented as a bilinear matrix inequality optimization problem for most design objectives. In this paper a new approach is proposed to the design of locally optimal controllers. It is iterative by nature, and starting from any initial feasible controller it performs local optimization over a suitably defined non-convex function at each iteration. The approach features the properties of computational efficiency, guaranteed convergence to a local optimum, and applicability to a very wide range of problems. Furthermore, a fast (but conservative) LMI-based procedure for computing an initially feasible controller is also presented. The complete approach is demonstrated on a model of one joint of a real-life space robotic manipulator. (C) 2004 Elsevier Ltd. All rights reserved.https://puma.ub.uni-stuttgart.de/bibtex/242d1b78569ecd89f80f0f48af825ce75/mhartmannmhartmann2018-07-20T10:54:15+02:00in Conservation porous function, capillarity, limit, media. flux singular law, dynamic discontinuous vorlaeufig flow two-phase <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="F. Kissling" itemprop="url" href="/person/1dfd390454fe4506ee81abb066cb2a4d4/author/0"><span itemprop="name">F. Kissling</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="K.H. Karlsen" itemprop="url" href="/person/1dfd390454fe4506ee81abb066cb2a4d4/author/1"><span itemprop="name">K. Karlsen</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik</span>, </em> </span>(<em><span>2013<meta content="2013" itemprop="datePublished"/></span></em>)</span>Fri Jul 20 10:54:15 CEST 2018ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift f{\"u}r Angewandte Mathematik und Mechanikn/a--n/aOn the singular limit of a two-phase flow equation with heterogeneities and dynamic capillary pressure2013in Conservation porous function, capillarity, limit, media. flux singular law, dynamic discontinuous vorlaeufig flow two-phase We consider conservation laws with spatially discontinuous flux that are perturbed by diffusion and dispersion terms. These equations arise in a theory of two-phase flow in porous media that includes rate-dependent (dynamic) capillary pressure and spatial heterogeneities. We investigate the singular limit as the diffusion and dispersion parameters tend to zero, showing strong convergence towards a weak solution of the limit conservation law.https://puma.ub.uni-stuttgart.de/bibtex/23cb83562fd4a436e376d28712fe58a37/mhartmannmhartmann2018-07-20T10:54:15+02:00simulation; Real-time models system; Material dynamic vorlaeufig flow System <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. Hoher" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/0"><span itemprop="name">S. Hoher</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="P. Schindler" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/1"><span itemprop="name">P. Schindler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. G?ttlich" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/2"><span itemprop="name">S. G?ttlich</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="V. Schleper" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/3"><span itemprop="name">V. Schleper</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. Röck" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/4"><span itemprop="name">S. Röck</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Enabling Manufacturing Competitiveness and Economic Sustainability</span>, </em><em><span itemprop="publisher">Springer Berlin Heidelberg</span>, </em></span>(<em><span>2012<meta content="2012" itemprop="datePublished"/></span></em>)</span>Fri Jul 20 10:54:15 CEST 2018Enabling Manufacturing Competitiveness and Economic Sustainability316-321System Dynamic Models and Real-time Simulation of Complex Material Flow Systems2012simulation; Real-time models system; Material dynamic vorlaeufig flow System