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World Journal of Orthopedics 2016年第11期7卷 758-765页

作者： Achim Elfering Christian Burger Volker Schade lorenz radlinger Department of Work and Organizational Psychology University of Bern Centre for Human Resource Management and Organizational Engineering Bern University of Applied Sciences

AIM To investigate the acute effects of stochastic resonance whole body vibration(SR-WBV), including muscle relaxation and cardiovascular *** Sixty-four healthy students participated. The participants were randomly assigned to sham SR-WBV training at a low intensity(1.5 Hz) or a verum SR-WBV training at a higher intensity(5 Hz). Systolic blood pressure(SBP), diastolic blood pressure(DBP), heart rate(HR) and selfreported muscle relaxation were assessed before and immediately after *** Two factorial analyses of variance(ANOVA) showed a significant interaction between pre- vs post-SR-WBVmeasurements and SR-WBV conditions for muscle relaxation in the neck and back [F(1,55) = 3.35, P = 0.048, η2 = 0.07]. Muscle relaxation in the neck and back increased in verum SR-WBV, but not in sham SR-WBV. No significant changes between pre- and post-training levels of SBD, DBD and HR were observed either in sham or verum SR-WBV conditions. With verum SR-WBV, improved muscle relaxation was the most significant in participants who reported the experience of back, neck or shoulder pain more than once a month(P < 0.05).CONCLUSION A single session of SR-WBV increased muscle relaxation in young healthy individuals, while cardiovascular load was low. An increase in musculoskeletal relaxation in the neck and back is a potential mediator of pain reduction in preventive worksite SR-WBV trials.

关键词： Musculoskeletal system Prevention Blood pressure Heart rate Low back pain

Stochastic resonance whole body vibration reduces musculoskeletal pain:A randomized controlled trial

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World Journal of Orthopedics 2011年第12期2卷 116-120页

作者： Achim Elfering Jan Thomann Volker Schade lorenz radlinger Department of Psychology University of Bern3000 BernSwitzerland Centre for Human Resource Management and Organizational Engineering 3000 BernSwitzerland Bern University of Applied Sciences Health3000 BernSwitzerland

AIM:To examined the effects of stochastic resonance whole-body vibration training on musculoskeletal pain in young healthy ***:Participants were 43 undergraduate students of a Swiss *** study was designed as a randomized controlled trial(RCT)with randomized group *** RCT consisted of two groups each given 12 training sessions during four weeks with either 5 Hz-Training frequency(training condition)or 1.5 Hz Training frequency(control condition).Outcome was current musculoskeletal pain assessed in the evening on each day during the four week training ***:Multilevel regression analysis showed musculoskeletal pain was significantly decreased in the training condition whereas there was no change in the control condition(B=-0.023,SE=0.010,P=0.021).Decrease in current musculoskeletal pain over four weeks was ***:Stochastic resonance whole-body vibration reduced musculoskeletal pain in young healthy *** resonance vibration and not any other exercise component within training caused pain reduction.

关键词： Randomized controlled trial Musculoskeletal pain Training study Stochastic vibration

Acute effects of stochastic resonance whole body vibration

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World Journal of Orthopedics 2013年第4期4卷 291-298页

作者： Achim Elfering Jasmine Zahno Jan Taeymans Angela Blasimann lorenz radlinger Department of Work and Organizational Psychology University of Bern Hea-lth Bern University of Applied Sciences

AIM: To investigate the acute effects of stochastic resonance whole body vibration(SR-WBV) training to identify possible explanations for preventive effects against musculoskeletal ***: Twenty-three healthy, female students participated in this quasi-experimental pilot study. Acute physiological and psychological effects of SR-WBV training were examined using electromyography of descending trapezius(TD) muscle, heart rate variability(HRV), different skin parameters(temperature, redness and blood flow) and self-report questionnaires. All subjects conducted a sham SR-WBV training at a low intensity(2 Hz with noise level 0) and a verum SR-WBV training at a higher intensity(6 Hz with noise level 4). They were tested before, during and after the training. Conclusions were drawn on the basis of analysis of ***: Twenty-three healthy, female students participated in this study(age = 22.4 ± 2.1 years; body mass index = 21.6 ± 2.2 kg/m2). Muscular activity of the TD and energy expenditure rose during verum SRWBV compared to baseline and sham SR-WBV(all P < 0.05). Muscular relaxation after verum SR-WBV was higher than at baseline and after sham SR-WBV(all P < 0.05). During verum SR-WBV the levels of HRV were similar to those observed during sham SR-WBV. The same applies for most of the skin characteristics, while microcirculation of the skin of the middle back was higher during verum compared to sham SR-WBV(P < 0.001). Skin redness showed significant changes over the three measurement points only in the middle back area(P = 0.022). There was a significant rise from baseline to verum SR-WBV(0.86 ± 0.25 perfusion units; P = 0.008). The self-reported chronic pain grade indicators of pain, stiffness, well-being, and muscle relaxation showed a mixed pattern across conditions. Muscle and joint stiffness(P = 0.018) and muscular relaxation did significantly change from baseline to different conditions of SR-WBV(P < 0.001). Moreover, muscle relaxation after v

关键词： Musculoskeletal system Electromyography Quasi-experimental study Prevention Relaxation

Acute effects of partial-body vibration in sitting position

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World Journal of Orthopedics 2018年第9期9卷 156-164页

作者： Yannik Faes Nora Banz Nathalie Buscher Angela Blasimann lorenz radlinger Patric Eichelberger Achim Elfering Department of Work and Organizational Psychology University of Bern Department of Health Professions Bern University of Applied Sciences

AIM To investigate the acute effects of sinusoidal and stochastic resonance partial-body vibration in sitting position, including muscle activity, heart rate variability, balance and *** Fifty healthy participants were assigned randomly to two training conditions: A sinusoidal partial-body vibration(SIN, 8 Hz) or a stochastic resonance partial-body vibration(STOCH, 8 ± 2 Hz). For baseline assessment participants sat on the vibration platform without vibration. Both training conditions consisted of five series of a one-minute vibration training and a one-minutebreak between them. In this experimental study surface electromyography(EMG) of the erector spinae(ES), one of the back muscles, and heart rate variability(HRV) was measured at baseline and during training. Balance and flexibility were assessed at baseline and immediately after training. Balance was measured with the modified star excursion balance test(mS EBT) and flexibility was assessed through the modified fingertip-to-floor method(mF TF).RESULTS Paired sample t-test showed a significant increase in balance that was restricted to STOCH(t =-2.22, P = 0.018; SIN: t =-0.09, P = 0.466). An increase in flexibility was also restricted to STOCH(t = 2.65, P = 0.007; SIN: t = 1.41, P = 0.086). There was no significant change of muscle activity in the ES-EMG in STOCH or SIN conditions. In both training conditions, HRV decreased significantly, but remained in a low-load range(STOCH: t = 2.89, P = 0.004; SIN: t = 2.55, P = 0.009).CONCLUSION In sitting position, stochastic resonance partial-body vibration can improve balance and flexibility while cardiovascular load is low. STOCH can be a valuable training option to people who are unable to stand(e.g., people, who are temporarily wheelchair-bound).

关键词： Partial-body vibration Balance Flexibility Sinusoidal Stochastic resonance

Effectiveness and Economic Evaluation of Therapeutic Nordic Walking in Patients with Psychosomatic Disorders： A Pragmatic Randomized Controlled Trial

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Psychology Research 2016年第11期6卷 665-675页

作者： Dorte Watzek Eugen Mischler Dorji Sonam Barbara Gubler-Blum Claudia Abbatiello lorenz radlinger Martin L. Verra Bern University of AppliedSciences Bern Switzerland Bern University Hospital Bern Switzerland

Support elements in conventional tunneling–Focus on long-term behavior

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Underground Space 2018年第4期3卷 277-287页

作者： Robert Galler Stefan lorenz Chair of Subsurface Engineering Department of Mineral Resources EngineeringMontanuniversita¨t LeobenP.O.Box 8700Erzherzog Johann Str.3LeobenAustria

Owing to increasing traffic and the need for constructing second tunnel tubes including corresponding cross-passages,where only one tube existed thus far,sampling of tunnel-lining materials with an age of 30–40 years has been made *** and in situ tests were carried out to evaluate the long-term effects of the tunnel *** paper presents the outcomes regarding the long-term behav-ior of support elements and membranes after performing strength tests on inner and outer lining concrete samples,flat jack tests,rock bolt tests,and tests on re-extracted sheet membranes,as well as ***,the interface connection mechanical behavior in a double-shell-lined tunnel was investigated with laboratory *** aim of this research was to determine the characteristics of sheet membranes and geotextiles in the case of reduced load-bearing capacity caused by degradation of the primary *** results provide information on the load-sharing effects of the interaction between the primary and secondary lining,depending on the waterproofing sheet membrane and geotextile *** on the results,conclusions for new design approaches for underground infrastructure construction can be formulated.

关键词： Tunnel lining Long-term behavior Concrete Sheet membrane Rock bolt Flat jack test In situ tests

Resolvent Estimates and Quantification of Nonlinear Stability

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Acta Mathematica Sinica,English Series 2000年第1期16卷 1-20页

作者： Heinz-Otto Kreiss Jens lorenz Department of Mathematics UCLALos AngelesCA 90095USA Department of Mathematics and Statistics UNMAlbuquerqueNM 87131USA

The aim of this paper is to clarify the role played by resolvent estimates for nonlinear *** will give examples showing that a large resolvent may lead to a small domain of nonlinear *** other examples the resolvent is large,but the domain of nonlinear stability is completely *** case prevails depends on the details of the problem. We will also show that the size of the resolvent depends in an essential way on the norms that are used.

关键词： Resolvent estimates Nonlinear stability Pseudospectrum Convection-dominated flow

Effect of processing parameters on in situ screen printing-assisted synthesis and electrical properties of Ti3SiC2-based structures

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Journal of Advanced Ceramics 2021年第1期10卷 129-138页

作者： Mylena lorenz Nahum TRAVITZKY Carlos R.RAMBO Department of Materials Science University of Erlangen-Nuremberg91058 ErlangenGermany Tomsk Polytechnic University 634050 TomskRussia Departm ent of Electrical and Electronic Engineering Federal University of Santa Catarina88040-900 FlorianopolisBrazil

This work reports on the development of pastes containing Ti,TiC,Si,and C elementary powders for in situ synthesis of Ti3SiC2 via screen *** paste compositions were manufactured using two powder mixtures(Ti/Si/C and Ti/TiC/Si/C)with different *** pastes were screen printed onto Al2O3 substrates and sintered at 1400℃in argon varying the dwell time from 1 to 5 *** printed pastes containing TiC and excess of Si exhibited the lowest surface roughness and after 5 h sintering comprised of Ti3SiC2 as the majority *** electrical conductivity of this sample was found to range from 4.63×10^(4)to 2.57×10^(5)S·m^(-1)in a temperature range of 25-400℃.

关键词： MAX phases Ti3SiC2 screen printing in situ synthesis electrical conductivity

Land Use Change and Causes in the Xiangxi Catchment, Three Gorges Area Derived from Multispectral Data

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Journal of Earth Science 2010年第6期21卷 846-855页

作者： Christoph Seeber Heike Hartmann 项伟 lorenz King Center for International Development and Environmental Research (ZEU) Justus Liebig University Giessen Department of Geography Geology and the Environment Slippery Rock University Three Gorges Research Center for Geo-hazard Ministry of Education China University of Geosciences Faculty of Engineering China University of Geosciences

The construction of the Three Gorges Dam on the Yangtze River has extensive impact on the ecosystems and the population of the Three Gorges Area （TGA）. Inundation and resettlement have induced far-reaching land use and land cover change （LUCC）. The areas that are affected by measures of resettlement are in a tense situation between the implementation of various governmental tasks addressing sustainable land use and water retention and the fulfilment of the population＇s economic needs, which primarily depend on agricultural production. Destabilization of slopes and soil erosion are immediate hazards induced by the impoundment. Farming is a very important source of income and has to persist on the one hand to assure the income of the rural population. On the other hand, the environment has to be protected from runoff, soil erosion and instabilities connected to relief, geology and hydraulic influences. In this study, supervised classifications are performed using Landsat-TM （1987 and 2007） and ASTER （2007） images. LUCC is assessed by post-classification change analysis. On the catchment scale, arable land has decreased significantly, while garden land （citrus orchards） and woodland have increased. LUCC mainly affects the area surrounding the reservoir （＂backwater＂） of the Xiangxi （香溪） River, driven by local resettlement, newly built infrastructure, relocation of land cultivation, and conversion of arable land to garden land. In the hinterland, LUCC occurs in form of abandonment of land cultivation as a consequence of the Grain-forGreen programme.

关键词： land use and land cover change Three Gorges Dam Yangtze River ecological

Recent advances in crystalline and amorphous particulate protein formulations for controlled delivery

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Asian Journal of Pharmaceutical Sciences 2016年第4期11卷 469-477页

作者： Sebastian Puhl lorenz Meinel Oliver Germershaus Institute for Pharmacy and Food Chemistry University of WuerzburgAm Hubland97074 WuerzburgGermany Institute for Pharma Technology University of Applied Sciences Northwestern SwitzerlandGruendenstrasse 404132 MuttenzSwitzerland

The number of particulate delivery systems for biologics is negligible compared to liquid dosage forms, signifying the complications associated with development of solid protein delivery systems. Particulate protein delivery systems can improve stability, reduce viscosity of suspensions at high protein concentration and allow for controlled drug release. This review discusses current advances in controlled delivery of particulate protein formulations. While the focus lies on protein crystals and delivery systems employing protein crystals,amorphous protein particles will also be addressed. Crystallization and precipitations methods and modifications allowing controlled delivery with and without encapsulation are summarized and discussed.

关键词： Protein crystals Protein particles Protein delivery Controlled release