Article
Refine
Year of publication
- 2021 (109) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (39)
- IfB - Institut für Bioengineering (27)
- Fachbereich Wirtschaftswissenschaften (16)
- INB - Institut für Nano- und Biotechnologien (15)
- Fachbereich Luft- und Raumfahrttechnik (12)
- Fachbereich Chemie und Biotechnologie (11)
- Fachbereich Bauingenieurwesen (8)
- Fachbereich Energietechnik (7)
- Fachbereich Elektrotechnik und Informationstechnik (6)
- Fachbereich Maschinenbau und Mechatronik (4)
Document Type
- Article (109) (remove)
Keywords
- Principal component analysis (2)
- capacitive field-effect sensor (2)
- constructive alignment (2)
- examination (2)
- harmonic radar (2)
- long-term retention (2)
- multimodal (2)
- practical learning (2)
- Aircraft sizing (1)
- AlterG (1)
- Architektur (1)
- Authenticity (1)
- Bacillus sp (1)
- Bemessung (1)
- Biosolubilization (1)
- Bloom’s Taxonomy (1)
- Bone quality and biomechanics (1)
- Bootstrap (1)
- Boundary integral equations (1)
- CFD (1)
- Capacitive field-effect sensor (1)
- CellDrum (1)
- Competence Developing Games (1)
- DLR-ESTEC GOSSAMER roadmap for solar sailing (1)
- Deuterated solvents (1)
- Deuterium NMR (1)
- Deutschland (1)
- Drinfeld modules (1)
- Earthquake (1)
- Empirical process (1)
- Environmental impact (1)
- Erdbebeneinwirkung (1)
- Frame structure (1)
- Frequency mixing magnetic detection (1)
- Functional Delta Method (1)
- GOSSAMER-1 (1)
- Game-based learning (1)
- Glaucoma (1)
- Hadamard differentiability (1)
- Helmholtz equation (1)
- Heparin (1)
- Hyperdifferentials (1)
- IR (1)
- IR spectroscopy (1)
- IT security education (1)
- Interior Neumann eigenvalues (1)
- Keyword analysis (1)
- LPS (1)
- Label-free detection (1)
- Langevin theory (1)
- Linear discriminant analysis (1)
- MUT measurement; scanner (1)
- Magnetic nanoparticles (1)
- Manufacturer (1)
- Mauerwerksbauten (1)
- Micromagnetic simulation (1)
- Modelica (1)
- Multi-storey (1)
- Muscle Fascicle (1)
- Muscle Force (1)
- Nonequilibrium dynamics (1)
- Numerics (1)
- Ocular blood flow (1)
- Paired sample (1)
- Parasitic drag (1)
- Piping (1)
- Plant virus (1)
- Potential theory (1)
- Powertrain (1)
- PushoverAnalysen (1)
- RVA (1)
- Radar (1)
- SFCW (1)
- Septic cardiomyopathy (1)
- Simulation (1)
- Skeletal muscle (1)
- Small Aral Sea (1)
- Small spacecraft (1)
- Soft independent modeling of class analogy (1)
- Solar sail (1)
- Standardization (1)
- Stiffness (1)
- TMV adsorption (1)
- Tank (1)
- Ta₂O₅ gate (1)
- Tendon Rupture (1)
- Tendons (1)
- Tobacco mosaic virus (TMV) (1)
- Transcendence (1)
- UAV (1)
- Ultrasound (1)
- VOP compression (1)
- Vascular response (1)
- Verhaltensbeiwerte (1)
- Visual field asymmetry (1)
- Wasserbau (1)
- Wasserwirtschaft (1)
- Zeta potential (1)
- acetoin (1)
- acetoin reductase (1)
- actin cytoskeleton (1)
- actuator-sensor system (1)
- alcoholic beverages (1)
- autonomous navigation (1)
- bioburdens (1)
- biosensors (1)
- body imaging at UHF MRI (1)
- building energy modelling (1)
- building energy simulation (1)
- business culture (1)
- capacitive EIS sensor (1)
- capacitive electrolyte–insulator–semiconductor sensors (1)
- capacitive field-effect sensors (1)
- cardiomyocyte biomechanics (1)
- change (1)
- colorization (1)
- control gate (1)
- crop yield (1)
- cyber-physical production systems (1)
- detection of charged macromolecules (1)
- digital factory (1)
- drop jump (1)
- ecological structure (1)
- enzymatic biosensor (1)
- enzyme kinetics (1)
- equivalent circuit (1)
- event-based simulation (1)
- field-effect sensor (1)
- frequency mixing magnetic detection (1)
- gait (1)
- genetic algorithm (1)
- global optimization (1)
- gold nanoparticles (1)
- graphene oxide (1)
- harmonic radar tags (1)
- heat demand (1)
- heat transfer coefficient (1)
- humic acid (1)
- hyper-gravity (1)
- hypo-gravity (1)
- industrial agents (1)
- integrated transmit coil arrays (1)
- intraclass correlation coefficient (1)
- large-scale inspection (1)
- layer-by-layer technique (1)
- light-addressable electrode (1)
- light-addressable potentiometric sensor (1)
- lignite (1)
- locomotion (1)
- low-rank coal (1)
- magnetic nanoparticles (1)
- management (1)
- metagenomics (1)
- microbial diversity (1)
- microfluidics (1)
- microwave measurements (1)
- mobile manipulation (1)
- motivation (1)
- multi-agent systems (1)
- multianalyte detection (1)
- multiplex detection (1)
- muscle fascicle behavior (1)
- muscle mechanics (1)
- nanomaterials (1)
- nonlinear VNA measurements (1)
- nonlinear radar (1)
- on-chip integrated addressable EISCAP sensors (1)
- parabolic flight (1)
- penicillin (1)
- penicillinase (1)
- photoelectrochemistry (1)
- plant virus detection (1)
- polyaniline (1)
- polystyrene sulfonate (1)
- qNMR (1)
- rehabilitation (1)
- running (1)
- sarcomere operating length (1)
- series elastic element behavior (1)
- shotgun sequencing (1)
- shoulder (1)
- soil amendment (1)
- soil health (1)
- soil remediation (1)
- sprint start (1)
- standard error of measurement (1)
- sterility tests (1)
- sterilization efficacy (1)
- sterilization methods (1)
- stochastic optimization (1)
- stretch reflex (1)
- surface-orthogonal path planning (1)
- t-modules (1)
- test-retest reliability (1)
- titanium dioxide photoanode (1)
- tobacco mosaic virus (TMV) (1)
- transponder (1)
- ultrasonography (1)
- ultrasound imaging (1)
- unloading (1)
- validation methods (1)
- walking (1)
- wind turbine production (1)
Achilles tendon rupture (ATR) patients have persistent functional deficits in the triceps surae muscle–tendon unit (MTU). The complex remodeling of the MTU accompanying these deficits remains poorly understood. The purpose of the present study was to associate in vivo and in silico data to investigate the relations between changes inMTU properties and strength deficits inATR patients. Methods: Elevenmale subjects who had undergone surgical repair of complete unilateral ATR were examined 4.6 ± 2.0 (mean ± SD) yr after rupture. Gastrocnemius medialis (GM) tendon stiffness, morphology, and muscle architecture were determined using ultrasonography. The force–length relation of the plantar flexor muscles was assessed at five ankle joint angles. In addition, simulations (OpenSim) of the GM MTU force–length properties were performed with various iterations of MTU properties found between the unaffected and the affected side. Results: The affected side of the patients displayed a longer, larger, and stiffer GM tendon (13% ± 10%, 105% ± 28%, and 54% ± 24%, respectively) compared with the unaffected side. The GM muscle fascicles of the affected side were shorter (32% ± 12%) and with greater pennation angles (31% ± 26%). A mean deficit in plantarflexion moment of 31% ± 10% was measured. Simulations indicate that pairing an intact muscle with a longer tendon shifts the optimal angular range of peak force outside physiological angular ranges, whereas the shorter muscle fascicles and tendon stiffening seen in the affected side decrease this shift, albeit incompletely. Conclusions: These results suggest that the substantial changes in MTU properties found in ATR patients may partly result from compensatory remodeling, although this process appears insufficient to fully restore muscle function.
„Smartes“ Laden an öffentlich zugänglichen Ladesäulen – Teil 2: USER-Verhalten und -Erwartungen
(2021)
Extension fractures are typical for the deformation under low or no confining pressure. They can be explained by a phenomenological extension strain failure criterion. In the past, a simple empirical criterion for fracture initiation in brittle rock has been developed. In this article, it is shown that the simple extension strain criterion makes unrealistic strength predictions in biaxial compression and tension. To overcome this major limitation, a new extension strain criterion is proposed by adding a weighted principal shear component to the simple criterion. The shear weight is chosen, such that the enriched extension strain criterion represents the same failure surface as the Mohr–Coulomb (MC) criterion. Thus, the MC criterion has been derived as an extension strain criterion predicting extension failure modes, which are unexpected in the classical understanding of the failure of cohesive-frictional materials. In progressive damage of rock, the most likely fracture direction is orthogonal to the maximum extension strain leading to dilatancy. The enriched extension strain criterion is proposed as a threshold surface for crack initiation CI and crack damage CD and as a failure surface at peak stress CP. Different from compressive loading, tensile loading requires only a limited number of critical cracks to cause failure. Therefore, for tensile stresses, the failure criteria must be modified somehow, possibly by a cut-off corresponding to the CI stress. Examples show that the enriched extension strain criterion predicts much lower volumes of damaged rock mass compared to the simple extension strain criterion.
The international partnership of space agencies has agreed to proceed forward to the Moon sustainably. Activities on the Lunar surface (0.16 g) will allow crewmembers to advance the exploration skills needed when expanding human presence to Mars (0.38 g). Whilst data from actual hypogravity activities are limited to the Apollo missions, simulation studies have indicated that ground reaction forces, mechanical work, muscle activation, and joint angles decrease with declining gravity level. However, these alterations in locomotion biomechanics do not necessarily scale to the gravity level, the reduction in gastrocnemius medialis activation even appears to level off around 0.2 g, while muscle activation pattern remains similar. Thus, it is difficult to predict whether gastrocnemius medialis contractile behavior during running on Moon will basically be the same as on Mars. Therefore, this study investigated lower limb joint kinematics and gastrocnemius medialis behavior during running at 1 g, simulated Martian gravity, and simulated Lunar gravity on the vertical treadmill facility. The results indicate that hypogravity-induced alterations in joint kinematics and contractile behavior still persist between simulated running on the Moon and Mars. This contrasts with the concept of a ceiling effect and should be carefully considered when evaluating exercise prescriptions and the transferability of locomotion practiced in Lunar gravity to Martian gravity.