检索结果-南通市图书馆

Electro-hydrodynamic(EhD) Thrust Analysis in Wire-Cylinder Electrode Arrangement

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2014年第4期16卷 363-369页

作者： Konstantinos N.KIOUSIS Antonios X.MORONIS wolf g.FRUh heriot-Watt University Technological Educational Institute(TEI) of Athens

The thrust generation by electro-hydrodynamic （EhD） effect has been studied for a wire-cylinder arrangement under high DC voltage. Series of measurements have been conducted in order to determine the relationship between generated thrust and corona discharge current, as well as its dependence on geometrical characteristics of the electrodes, e.g. electrode gap, wire and cylinder radii. The experimental investigation has shown a linear relationship between the generated thrust and the discharge current, while parametric analysis showed that increased electrode gap and emitter radius reduces the thrust. On the other hand, large gaps favor the thrust per unit power ratio.

关键词： electro-hydrodynamic (EhD) effect thrust wire-cylinder electrodes

Entropy and Energy 2005

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fertility and sexual life of men after their forties and in older age

丛书名： Interaction of Mechanics and Mathematics

2005年

作者： ingo Müller wolf Weiss

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2001年第1期3卷 1-7页

作者： wolf-Bernhard Schill Department of Dermatoloyg and Andrology Hessian Center of Reprocuctive Medicine Justus Liebig University Giessen Germany

Owing to the demographic development, the aging male will require more consideration in future. In contrast to arapid decline of estradiol during menopause in women, the process of aging in the male is retarded and subject to highindividual variations. Impairment of spermatogenesis is observed as a continuous process occurring over decades. how-ever, only about 50% of men in their eighties show complete loss of fertility. In principle, spermatogenesis may be re-tained well into senescence. Of importance for the individual health condition is the fact that the number of Leydig cellsdeclines with advancing age. Thus, altered sex hormone concentrations in aging men result from both functional distur-bances and a gradual reduction in Leydig cells. Furthermore, an impaired feed-back mechanism of the pituitary-gonadalaxis occurs, with disappearance of the circadian testosterone (T) rhythm. Lh and FSh levels are increased, and a re-duced bioavailability of sex hormones is observed. Lower total testosterone concentrations in men over 60 years are ac-companied by clinical signs of reduced virility, such as decreased muscle mass and strength as well as reduced sexualhair growth and libido. An age-related decline in androgen secretion and plasma testosterone levels therefore suggeststhe use of androgen supplementation. however, there is a lack of risk-benefit long-term studies. Increased research inthe male is mandatory to meet the requirements of the aging population. This should include the availability of preciseepidemiological data about the frequency of partial androgen deficiency in aging males (PADAM).(Asian J Androl 2001 Mar; 3: 1-7)

关键词： aging spermatogenesis androgens testosterone supplementation

Dynamics and functions of E‑cadherin complexes in epithelial cell and tissue morphogenesis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Marine Life Science & Technology 2023年第4期5卷 585-601页

作者： Na Zhang Matthias häring Fred wolf Jörg großhans Deqing Kong Department of Biology Philipps University35043 MarburgGermany göttingen Campus Institute for Dynamics of Biological Networks(CIDBN) Georg August University Göttingen37073 GöttingenGermany

Cell–cell adhesion is at the center of structure and dynamics of epithelial tissue.E-cadherin–catenin complexes mediate Ca^(2+)-dependent trans-homodimerization and constitute the kernel of adherens *** the basic function of cell–cell adhesion,recent progress sheds light the dynamics and interwind interactions of individual E-cadherin–catenin complex with E-cadherin superclusters,contractile actomyosin and mechanics of the cortex and *** nanoscale architecture of E-cadherin complexes together with cis-interactions and interactions with cortical actomyosin adjust to junctional tension and mechano-transduction by reinforcement or weakening of specific features of the *** post-translational modifications such as phosphorylation and glycosylation have been implicated,their role for specific aspects of in E-cadherin function has remained ***,we provide an overview of the E-cadherin complex in epithelial cell and tissue morphogenesis focusing on nanoscale architectures by super-resolution approaches and post-translational modifications from recent,in particular in vivo,***,we review the computational modelling in E-cadherin complexes and highlight how computational modelling has contributed to a deeper understanding of the E-cadherin complexes.

关键词： Nanoscale architectures Phosphorylation glycosylation Computational modelling

Expressionism Norbert wolf ; Uta grosenick (ed.).

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Data-driven prediction of plate velocities and plate deformation of explosive reactive armor

作者： (1949-)wolf Norbert grosenick Uta.

来源：南通市图书馆图书评论

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2022年第12期18卷 2141-2149页

作者： Marvin Becker Andreas Klavzar Thomas wolf Melissa Renck Institute of Saint-Louis 5 Rue du Général Cassagnou68330Saint LouisCedexFrance Ecole Centrale de Lille CitéScientifique59651Villeneuve d'AscqCedexFrance

Explosive reactive armor(ERA)is currently being actively developed as a protective system for mobile devices against ballistic threats such as kinetic energy penetrators and shaped-charge *** mobility,the aim is to design a protection system with a minimal amount of required *** efficiency of an ERA is sensitive to the impact position and the timing of the ***,different designs have to be tested for several impact scenarios to identify the best *** analytical models are not predicting the behavior of the ERA accurately enough and experiments,as well as numerical simulations,are too time-consuming,a data-driven model to estimate the displacements and deformation of plates of an ERA system is proposed *** ground truth for the artificial neural network(ANN)is numerical simulation results that are validated with *** ANN approximates the plate positions for different materials,plate sizes,and detonation point positions with sufficient accuracy in *** a future investigation,the results from the model can be used to estimate the interaction of the ERA with a given ***,a measure for the effectiveness of an ERA can be ***,an optimal ERA can be designed and analyzed for any possible impact scenario in negligible time.

关键词： Artificial neural network Explosive reactive armor Finite element simulation Particle simulation Flash X-ray

MtDNA mutations and aging--not a closed case after all?

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2021年第3期6卷 555-556页

作者： Alexander M.wolf Laboratory for Morphological and Biomolecular Imaging Faculty of MedicineNippon Medical SchoolTokyoJapan

In a recent paper in Nature Cancer,Smith et *** that mitochondrial DNA(mtDNA)mutations can confer a growth advantage to intestinal tumors by remodeling cell metabolism,particularly toward elevated de novo serine synthesis.1 For the reasons outlined below,in the past decade,the field of mtDNA biology has experienced a relative loss of *** findings of Smith et *** welcome new life into the complex field of mtDNA contributions to aging and cancer.

关键词： al. metabolism elevated

Towards Accurate Bit Error Simulation in Wireless Sensor Networks Including Environmental Influences

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2020年第4期35卷 809-824页

作者： Sven Pullwitt Robert hartung Ulf Kulau Lars wolf Institute for Operating Systems and Computer Networks Technische Universitat BraunschweigBraunschweig 38106 Germany

Simulation is a common technique for the evaluation of new approaches and protocols in networked systems and provides many ***,it is also well known that the relevance of the simulation results for real-world applications depends on the various models which are used within the simulation,e.g.,for the characteristics of the radio *** this paper,we introduce the Extended Multipath Raytracing Model,an extension to the ray-tracing radio medium available in Cooja,to improve the modelling of wireless links in simulated Wireless Sensor *** extension allows the simulation of environmental influences onto links on a per node basis,allowing the analysis of various effects observed in experiments in a virtual ***,the packet-based modelling of transmission errors is extended to provide the simulation of bit errors,allowing new usage scenarios,like the simulation of error detection and Forward Error Correction codes in Cooja.

关键词： bit error Contiki Cooja environmental influence simulation wireless sensor network

Advancement in biochemical assays in andrology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 1999年第1期1卷 45-51页

作者： wolf-BernhardSchill Ralfhenkel Center of Dermatology and Andrology Justus Liebig University Giessen GermanyCenter of Dermatology and Andrology Justus Liebig University Giessen Germany

Determination of markers of sperm function, accessory sex gland secretion and silent male genital tractinflammation is of considerable diagnostic value in the evaluation of male infertility. The introduction of biochemicaltests into the analysis of male factor has the advantage that standardized assays with a coefficient of variationcharacteristic of clinical chemistry are performed, in contrast to biological test systems with a large *** parameters may be used in clinical practice to evaluate the sperm fertilizing capacity (acrosin, aniline blue,ROS), to characterize male accessory sex gland secretions (fructose, α-glucosidase, PSA), and to identify men withsilent genital tract inflammation (elastase, C'3 complement component, coeruloplasmin, IgA, Igg, ROS).

关键词： male infertility biological markers spermatozoa male genital diseases sex gland Secretion