TY  - JOUR
A1  - Nguyen-Xuan, H.
A1  - Rabczuk, T.
A1  - Nguyen-Thoi, T.
A1  - Tran, Thanh Ngoc
A1  - Nguyen-Thanh, N.
T1  - Computation of limit and shakedown loads using a node-based smoothed finite element method
JF  - International Journal for Numerical Methods in Engineering
N2  - This paper presents a novel numerical procedure for computing limit and shakedown loads of structures using a node-based smoothed FEM in combination with a primal–dual algorithm. An associated primal–dual form based on the von Mises yield criterion is adopted. The primal-dual algorithm together with a Newton-like iteration are then used to solve this associated primal–dual form to determine simultaneously both approximate upper and quasi-lower bounds of the plastic collapse limit and the shakedown limit. The present formulation uses only linear approximations and its implementation into finite element programs is quite simple. Several numerical examples are given to show the reliability, accuracy, and generality of the present formulation compared with other available methods.
Y1  - 2011
U6  - http://dx.doi.org/10.1002/nme.3317
SN  - 1097-0207
VL  - 90
IS  - 3
SP  - 287
EP  - 310
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Nguyen, Nhu Huynh
A1  - Duong, Minh Tuan
A1  - Tran, Thanh Ngoc
A1  - Pham, Phu Tinh
A1  - Grottke, O.
A1  - Tolba, R.
A1  - Staat, Manfred
T1  - Influence of a freeze–thaw cycle on the stress–stretch curves of tissues of porcine abdominal organs
JF  - Journal of Biomechanics
N2  - The paper investigates both fresh porcine spleen and liver and the possible decomposition of these organs under a freeze–thaw cycle. The effect of tissue preservation condition is an important factor which should be taken into account for protracted biomechanical tests. In this work, tension tests were conducted for a large number of tissue specimens from twenty pigs divided into two groups of 10. Concretely, the first group was tested in fresh state; the other one was tested after a freeze-thaw cycle which simulates the conservation conditions before biomechanical experiments. A modified Fung model for isotropic behavior was adopted for the curve fitting of each kind of tissues. Experimental results show strong effects of the realistic freeze–thaw cycle on the capsule of elastin-rich spleen but negligible effects on the liver which virtually contains no elastin. This different behavior could be explained by the autolysis of elastin by elastolytic enzymes during the warmer period after thawing. Realistic biomechanical properties of elastin-rich organs can only be expected if really fresh tissue is tested. The observations are supported by tests of intestines.
KW  - Autolysis
KW  - Decomposition
KW  - Freeze–thaw process
KW  - Spleen
KW  - Liver
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.jbiomech.2012.07.008
SN  - 1873-2380
VL  - 45
IS  - 14
SP  - 2382
EP  - 2386
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Nguyen, N.-H.
A1  - Raatschen, Hans-Jürgen
A1  - Staat, Manfred
T1  - A hyperelastic model of biological tissue materials in tubular organs
Y1  - 2010
N1  - ECCM 2010, IV European Conference on Computational Mechanics, Paris, France, May 16-21, 2010.
SP  - 1
EP  - 12
ER  - 
TY  - JOUR
A1  - Neumaier, Felix
A1  - Weiss, Miriam
A1  - Veldeman, Michael
A1  - Kotliar, Konstantin
A1  - Wiesmann, Martin
A1  - Schulze-Steinen, Henna
A1  - Höllig, Anke
A1  - Clusmann, Hans
A1  - Schubert, Gerrit Alexander
A1  - Albanna, Walid
T1  - Changes in endogenous daytime melatonin levels after aneurysmal subarachnoid hemorrhage – preliminary findings from an observational cohort study
JF  - Clinical Neurology and Neurosurgery
N2  - Aneurysmal subarachnoid hemorrhage (aSAH) is associated with early and delayed brain injury due to several underlying and interrelated processes, which include inflammation, oxidative stress, endothelial, and neuronal apoptosis. Treatment with melatonin, a cytoprotective neurohormone with anti-inflammatory, anti-oxidant and anti-apoptotic effects, has been shown to attenuate early brain injury (EBI) and to prevent delayed cerebral vasospasm in experimental aSAH models. Less is known about the role of endogenous melatonin for aSAH outcome and how its production is altered by the pathophysiological cascades initiated during EBI. In the present observational study, we analyzed changes in melatonin levels during the first three weeks after aSAH.
KW  - constructive alignment
KW  - examination
KW  - long-term retention
KW  - multimodal
KW  - practical learning
Y1  - 2021
U6  - http://dx.doi.org/10.1016/j.clineuro.2021.106870
SN  - 0303-8467
VL  - 208
IS  - Article No.: 106870
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Neumaier, Felix
A1  - Kotliar, Konstantin
A1  - Haeren, Roel Hubert Louis
A1  - Temel, Yasin
A1  - Lüke, Jan Niklas
A1  - Seyam, Osama
A1  - Lindauer, Ute
A1  - Clusmann, Hans
A1  - Hescheler, Jürgen
A1  - Schubert, Gerrit Alexander
A1  - Schneider, Toni
A1  - Albanna, Walid
T1  - Retinal Vessel Responses to Flicker Stimulation Are Impaired in Ca v 2.3-Deficient Mice—An in- vivo Evaluation Using Retinal Vessel Analysis (RVA)
JF  - Frontiers in Neurology
Y1  - 2021
U6  - http://dx.doi.org/10.3389/fneur.2021.659890
VL  - 12
SP  - 1
EP  - 11
PB  - Frontiers
ER  - 
TY  - JOUR
A1  - Nam, J.
A1  - Arora, D.
A1  - Behbahani, Mehdi
A1  - Probst, M.
A1  - Benkowski, R.
A1  - Behr, M.
A1  - Pasquali, M.
T1  - New computational method in hemolysis analysis for artificial heart pump
Y1  - 2010
N1  - Posterpresentation ; American Society of Artificial Organs (ASAIO), Baltimore, USA, May 27-29, 2010
ER  - 
TY  - JOUR
A1  - Müller, Wolfram
A1  - Jung, Alexander
A1  - Ahammer, Helmut
T1  - Advantages and problems of nonlinear methods applied to analyze physiological time signals: human balance control as an example
JF  - Scientific Reports
Y1  - 2017
SN  - 2045-2322
U6  - http://dx.doi.org/10.1038/s41598-017-02665-5
VL  - 7
IS  - Article number 2464
SP  - 1
EP  - 11
PB  - Springer Nature
CY  - Cham
ER  - 
TY  - JOUR
A1  - Murgan, Ilina
A1  - Beyer, Sonja
A1  - Kotliar, Konstantin
A1  - Weber, Lutz
A1  - Bechtold-Dalla Pozza, Susanne
A1  - Dalla Pozza, Robert
A1  - Wegner, Aharon
A1  - Sitnikova, Diana
A1  - Stock, Konrad
A1  - Heemann, Uwe
A1  - Schmaderer, Christoph
A1  - Baumann, M.
T1  - Arterial and Retinal Vascular Changes in Hypertensive and Prehypertensive Adolescents
JF  - American Journal of Hypertension
Y1  - 2013
SN  - 1941-7225
VL  - 26
IS  - 3
SP  - 400
EP  - 408
PB  - Oxford University Press
CY  - Oxford
ER  - 
TY  - CHAP
A1  - Mueller, Wolfram
A1  - Jung, Alexander
A1  - Schmölzer, Bernhard
ED  - Faulhaber, Martin
ED  - Schobersberger, Wolfgang
ED  - Schobersberger, Beatrix
ED  - Sumann, Günther
ED  - Domej, Wolfgang
T1  - Der Einfluss der Höhe über dem Meeresspiegel auf die Flugbahnen im Schispringen
T1  - The influence of altitude on the flight paths in ski jumping
T2  - Jahrbuch 2015 - Österreichische Gesellschaft für Alpin- und Höhenmedizin
Y1  - 2015
SN  - 978-3-9501312-5-3
SP  - 173
EP  - 190
PB  - Österreichische Gesellschaft für Alpin- und Höhenmedizin
CY  - Innsbruck
ER  - 
TY  - JOUR
A1  - Morat, Mareike
A1  - Faude, Oliver
A1  - Hanssen, Henner
A1  - Ludyga, Sebastian
A1  - Zacher, Jonas
A1  - Eibl, Angi
A1  - Albracht, Kirsten
A1  - Donath, Lars
T1  - Agility Training to Integratively Promote Neuromuscular, Cognitive, Cardiovascular and Psychosocial Function in Healthy Older Adults: A Study Protocol of a One-Year Randomized-Controlled Trial
JF  - International Journal of Environmental Research and Public Health
N2  - Exercise training effectively mitigates aging-induced health and fitness impairments. Traditional training recommendations for the elderly focus separately on relevant physiological fitness domains, such as balance, flexibility, strength and endurance. Thus, a more holistic and functional training framework is needed. The proposed agility training concept integratively tackles spatial orientation, stop and go, balance and strength. The presented protocol aims at introducing a two-armed, one-year randomized controlled trial, evaluating the effects of this concept on neuromuscular, cardiovascular, cognitive and psychosocial health outcomes in healthy older adults. Eighty-five participants were enrolled in this ongoing trial. Seventy-nine participants completed baseline testing and were block-randomized to the agility training group or the inactive control group. All participants undergo pre- and post-testing with interim assessment after six months. The intervention group currently receives supervised, group-based agility training twice a week over one year, with progressively demanding perceptual, cognitive and physical exercises. Knee extension strength, reactive balance, dual task gait speed and the Agility Challenge for the Elderly (ACE) serve as primary endpoints and neuromuscular, cognitive, cardiovascular, and psychosocial meassures serve as surrogate secondary outcomes. Our protocol promotes a comprehensive exercise training concept for older adults, that might facilitate stakeholders in health and exercise to stimulate relevant health outcomes without relying on excessively time-consuming physical activity recommendations.
KW  - agility
KW  - prevention
KW  - healthy aging
KW  - community dwelling
KW  - psychosocial
Y1  - 2020
U6  - http://dx.doi.org/10.3390/ijerph17061853
SN  - 1660-4601
VL  - 17
IS  - 6
SP  - 1
EP  - 14
PB  - MDPI
CY  - Basel
ER  -