检索结果-南通市图书馆

Fracture toughness and destructive mechanism of ductile nanoporous metallic glass and its crystal-impregnated nanocomposite

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

science China(Technological sciences) 2023年第11期66卷 3328-3342页

作者： ZHANG YuHang XU JianFei HU YiQun sU Lei DING suHang WU WenWang XIA re Key Laboratory of Hydraulic Machinery Transients(Wuhan University) Ministry of EducationWuhan 430072China Department of Engineering Mechanics School of Naval ArchitectureOcean&Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Nanoporous metallic glasses(NPMGs)and crystalline/amorphous nanocomposites exhibit superior ductility over bulk macroscopic metallic glasses(MGs).Their fracture behaviors remain a mystery due to experimental technical *** this work,the fracture behaviors of pre-cracked NPMGs and crystal-impregnated nanoporous metallic glasses(CINPMGs)are investigated through large-scale molecular dynamics simulations,and the MG and crystal phases are amorphous Cu_(50)Zr_(50)and crystalline B2CuZr,*** toughness is determined by simultaneously considering the surface energy and plastic dissipated *** results confirm the excellent plasticity of both the pre-cracked NPMGs and *** progressive necking and ductile rupture of ligaments are responsible for generating NPMGs with prominent ductility and fracture ***,secondary cracking is also triggered,which can consume energy without extending the major crack,thus further improving fracture *** is also found that the fracture toughness of NPMGs can be improved by increasing the solid fraction of MG,and linear relation between fracture toughness and solid fraction can be *** impregnation effectively inhibits global failure as the crystal phase shields the individual amorphous *** plastic flow characterized by shear bands is observed in CINPMGs,and this homogeneous global deformation is facilitated by the crystalline/amorphous ***,the fracture toughness of CINPMGs is higher than that of the constituent single phases,regardless of the volume fraction of each *** material charts manifest that these two types of materials demonstrate promising potential in the material selection library for advanced structural design.

关键词： nanoporous metals crack fracture toughness nanocomposites metallic glasses

Validation of the Wii Balance Board to assess static balance during dual-task activity in healthy subjects

在线全文

学校读者我要写书评

暂无评论

Medicine in Novel Technology and Devices 2019年第1期1卷 2-7页

作者： B.Bonnechère O.Van Hove B.Jansen s.Van sint Jan Laboratory of Anatomy Biomnechanics and Organogenesis(LABO)Universite Libre de BruxellesBrusselsBelgium Department of Electronics and Informatics-ETRO Vrije Universiteit BrusselBrusselsBelgium Imec LeuvenBelgium Chest and Thoracic surgery Department Erasme HospitalBrusselsBelgium

Objective:Although dual-task paradigm is commonly used in rehabilitation there is,currently,a lack of information about quantitative balance assessment performed in dual-task *** aim of this study is to validate the use of the Nintendo Wii Balance Board(WBB)to assess balance modifications induced by dual-task activity in healthy *** and methods:seventy-five healthy participants(37±14 years old,173±8 cm,7316 kg,35 women)participated in this *** was recorded in control situation(baseline)and under two different cognitive tasks(verbal fluency and calculation).Each trial lasted for 60 s and were performed with eyes open and *** parameters were extracted based on center of pressure displacement based on a previously-validated *** tests were used to compare the different conditions followed by Bonferroni’s *** was repeated one week after to assess the ***:statistically significant differences were found comparing eyes open and closed *** the influence of dual-tasks statistically significant decrease of the balance was observed for both eyes open and closed conditions(increase of the total sway and the speed of displacement).Concerning the reproducibility all parameters shows good to excellent ICC values for the different ***:In this study,we demonstrated the validity of the WBB to detect the effect of the dual-task on balance in healthy *** studies are needed to determine if such a kind of evaluation can be used in clinics with subjects at risk of falling.

关键词： Balance Wii Balance Board Dual-task Cognition

Peripheral nerve regeneration and intraneural revascularization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural regeneration research 2019年第1期14卷 24-33页

作者： Martial Caillaud Laurence Richard Jean-Michel Vallat Alexis Desmoulière Fabrice Billet University of Limoges Myelin Maintenance and Peripheral Neuropathies Faculties of Medicine and Pharmacy University Hospital of Limoges Department of Neurology "Reference Center for Rare Peripheral Neuropathies" Department of Neurology

Peripheral nerves are particularly vulnerable to injuries and are involved in numerous pathologies for which specific treatments are lacking. This review summarizes the pathophysiological features of the most common traumatic nerve injury in humans and the different animal models used in nerve regeneration studies. ~Ihe current knowledge concerning Wallerian degeneration and nerve regrowth is then described. Finally, the involvement of intraneural vascularization in these processes is addressed. As intraneural vascularization has been poorly studied, histological experiments were carried out from rat sciatic nerves damaged by a glycerol injection. The results, taken together with the data from literature, suggest that revascularization plays an important role in peripheral nerve regeneration and must therefore be studied more carefully.

关键词： compression crush transection sunderland's classification Wallerian degeneration angiogenesis traumatic glycerol

Isolation and characterization of five novel mini-M conotoxins from the venom of mollusk-hunter snail Conus bandanus

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2020年第8期10卷 343-352页

作者： Nguyen Bao Jean-Pière LE CAER Phan Thi Khanh Vinh Faculty of Food Technology Nha Trang University02 Nguyen Dinh ChieuNha TrangKhanh HoaVietnam Institut de Chimie des substances Naturelles Centre de Recherche de Gif-FRC3115-UPR 2301F-91198 Gif-sur-YvetteFrance

Objective:To determine the new M-superfamily conotoxins from molluscivorous snail Conus bandanus in ***:Conus bandanus venom was fractionated and purified on HPLC system with an analytical reversed-phase C18 column in order to screen small *** primary structure of peptide was analyzed by matrix-assisted laser desorption/ionization time of flight tandem mass spectrometry using collision-induced dissociation and confirmed by Edman’s degradation ***:Five new conotoxins were biochemically characterized from the crude venom of the mollusk-hunting cone snail Conus bandanus,which were collected at Ke Ga reef of the Nha Trang Bay(Vietnam).Each conotoxin had 15 or 16 amino acid residues and shared the same characteristic cysteine framework V as–CC–C–C–CC–.They were termed as Bn3 b,Bn3 c,Bn3 d,Bn3 e and Bn3 f following the conotoxins ***:The conotoxins Bn3 b,Bn3 e,and Bn3 f are categorized in the mini-M conotoxins of the M1 branch,while conotoxins Bn3 c and Bn3 d are categorized in the mini-M conotoxins of the M2 *** homological analysis reveals that these conotoxins could serve as promising probe compounds for voltage-gated sodium channels.

关键词： Mini-M conotoxin Conus bandanus Cone snail venom

A Posteriori stabilized sixth-Order Finite Volume scheme with Adaptive stencil Construction:Basics for the 1D steady-state Hyperbolic Equations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications on Applied Mathematics and Computation 2023年第2期5卷 751-775页

作者： Gaspar J.Machado stéphane Clain Raphaël Loubère Centre of Physics and Department of Mathematics University of MinhoCampus of Azurém4800-058 GuimaraesPortugal CNRs and Institut de Mathématiques de Bordeaux(IMB) Universitéde BordeauxTalenceFrance

We propose an adaptive stencil construction for high-order accurate finite volume schemes a posteriori stabilized devoted to solve one-dimensional steady-state hyperbolic *** accuracy(up to the sixth-order presently)is achieved,thanks to polynomial recon-structions while stability is provided with an a posteriori MOOD method which controls the cell polynomial degree for eliminating non-physical oscillations in the vicinity of *** supplemented this scheme with a stencil construction allowing to reduce even further the numerical *** stencil is shifted away from troubles(shocks,discontinuities,etc.)leading to less oscillating polynomial *** on linear,Burgers',and Euler equations,we demonstrate that the adaptive stencil technique manages to retrieve smooth solutions with optimal order of accuracy but also irregular ones without spurious ***,we numerically show that the approach allows to reduce the dissipation still maintaining the essentially non-oscillatory behavior.

关键词： Finite volume MOOD Adaptive stencil steady-state solution Euler equations High order

Getting physical with medical education:Exercise based virtual anatomy review classes for medical students

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Methodology 2025年第1期15卷 20-25页

作者： Nadeesha R samarasinghe Taniya s Nagpal Michele L Barbeau Charys M Martin Division of General surgery Faculty of MedicineUniversity of British ColumbiaVancouver V6T 1Z3BCCanada Faculty of Kinesiology Sport and RecreationUniversity of AlbertaEdmonton T6G 2R3ABCanada Anatomy and Cell Biology University of Western OntarioLondon N6A 3K7ONCanada Department of Anatomy and Cell Biology Schulich School of Medicine and DentistryThe University of Western OntarioLondon N6A 3K7ONCanada

The benefits of regular physical activity are well ***,few studies have examined the effectiveness of integrating physical activity(PA)into curricula within a post-secondary *** investigate the incorporation of PA into medical curriculum,we developed a series of optional exercise-based review sessions designed to reinforce musculoskeletal(MsK)anatomy course *** synchronous sessions were co-taught by a group fitness instructor and an anatomy *** fitness instructor would lead students through both strength and yoga style exercises,while the anatomy instructor asked questions about relevant anatomical structures related to course material previously *** the sessions,participants were asked to evaluate the classes on their self-reported exam preparedness in improving MsK anatomy knowledge,PA levels,and mental *** participants completed surveys;a majority agreed that the classes increased understanding of MsK concepts(90.0%)and activity levels(97.7%).Many(70.0%)felt that the classes helped reduce *** majority of respondents(90.0%)agreed that the classes contributed to increased feelings of social ***,medical students saw benefit in PA based interventions to supplement MsK course *** with increasing activity levels and promoting health behaviours,integrating PA into medical curriculum may improve comprehension of learning material,alleviate stress and foster social connectivity among medical students.

关键词： Medical education Musculoskeletal Anatomy Exercise Online learning

Data-driven drug repositioning using olfactory omics profiles:challenges and perspectives in neurodegeneration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural regeneration research 2025年第7期20卷 1997-1998页

作者： Paz Cartas-Cejudo Adriana Cortés Mercedes Lachén-Montes Elena Anaya-Cubero Joaquín Fernández-Irigoyen Enrique santamaría Clinical Neuroproteomics Unit Proteomics PlatformNavarrabiomedHospitalario Universitario de Navarra(HUN)Universidad Pública de Navarra(UPNA)IdiSNANavarra Institute for Health ResearchPamplonaSpain

Data-driven drug repositioning using olfactory omics profiles-challenges and perspectives in neurodegeneration:Neurodegenerative diseases are characterized by progressive degeneration and loss of neuronal function in the central nervous *** diseases are often characterized as proteinopathies,which are disorders primarily driven by the aggregation or misfolding of specific amyloid proteins within cells,leading to their dysfunction and eventual *** the gain-of-function hypothesis related to the aggregation of these proteins,recently,an alternative hypothesis regarding the loss-of-function of the soluble monomeric proteins during the process of aggregation into amyloids is gaining *** last event is called proteinopenia and refers to conditions characterized by a deficiency or decrease in the levels of specific soluble proteins in the body(Ezzat et al.,2023).It has been demonstrated that levels of soluble proteins involved in neurodegenerative diseases are decreased.

关键词： diseases drug amyloid

The Evolution of Personal Mobile Communications

在线全文

学校读者我要写书评

暂无评论

通信学报 1995年第4期16卷 3-7页

作者： Dr.I.s.Groves(BT Laboratories,Martlesham Heath Ipswich,IP5 7re,England) BT Laboratories Martlesham Heath Ipswich 英国

ＴｈｅＥｖｏｌｕｔｉｏｎｏｆＰｅｒｓｏｎａｌＭｏｂｉｌｅＣｏｍｍｕｎｉｃａｔｉｏｎｓＤｒ．Ｉ．Ｓ．Ｇｒｏｖｅｓ（ＢＴＬａｂｏｒａｔｏｒｉｅｓ，ＭａｒｔｌｅｓｈａｍＨｅａｔｈＩｐｓｗｉｃｈ，ＩＰ５７ＲＥ，Ｅｎｇｌａｎｄ... 详细信息

ＴｈｅＥｖｏｌｕｔｉｏｎｏｆＰｅｒｓｏｎａｌＭｏｂｉｌｅＣｏｍｍｕｎｉｃａｔｉｏｎｓＤｒ．Ｉ．Ｓ．Ｇｒｏｖｅｓ（ＢＴＬａｂｏｒａｔｏｒｉｅｓ，ＭａｒｔｌｅｓｈａｍＨｅａｔｈＩｐｓｗｉｃｈ，ＩＰ５７ＲＥ，Ｅｎｇｌａｎｄ）Ａｂｓｔｒａｃｔ：ＷｉｔｈｉｎＥ...

关键词：个人移动通信 GsM 时分多址泛欧数字无绳电话

Berry‘’s Phase in Noncommutative spaces

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2003年第5期20卷 605-607页

作者： s.A.Alavi HighEnergyPhysicsDivision DepartmentofPhysicsUniversityofHelsinkiFinlandHelsinkiInstituteofPhysicsFIN-00014HelsinkiFinland

We discuss the perturbative aspects of noncommutative quantum mechanics. Then we study Berry's phase within the framework of noncommutative quantum mechanics. The results show deviations from the usual quantum mechani... 详细信息

关键词：贝里相位量子力学非交换空间扰动