检索结果-南通市图书馆

Effects of slag fineness on durability of mortars

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang university-science A(Applied Physics & Engineering) 2007年第11期8卷 1725-1730页

作者： TOPu lker bekir blR Turhan Department of Civil Engineering Eski■ehir Osmangazi university Eski■ehir 26480 Turkey

In recent years, the usages of by-products and wastes in industry have become more important. The importance of the sustainable development is also of increasing. The utilizations of wastes, as mineral admixture or fine aggregate, reduce the consumption of the natural resources and improve the durability of concrete. In this study, the effect of the fineness on the high temperature and sulphate resistances of concrete mortar specimens, produced with ground granulated blast-furnace slag (GbFs) replacing cement, is investigated. The compressive and flexural strength test results for all series related to durability effects, exposing temperature and solutions, exposure times for these durability effects, slag content and fineness are discussed. Conse- quently, the optimum slag contents are determined for producing the sulphate and high temperature resistant mortars.

关键词： Cement Fineness Ground slag High temperature effect sulphate attack sustainable development

On the detection of closed orbits in time-dependent systems by using double-pulse lasers

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第9期72卷 111-117页

作者： s u Khan M l Du Institute of Theoretical Physics Chinese Academy of Sciences.Beijing 100190China university of Chinese Academy of sciences Beijing100049China

In the photodetachment of atoms or negative ions by a double-pulse laser, the first pulse of the double-pulse laser generates waves and the delayed second pulse may detect them. The phenomenon of the excitation and detection of waves by a double-pulse laser can be used to identify the closed orbits in the system. We demonstrate this phenomenon with a negative hydrogen ion(H^-) by analyzing the total population excited by a double-pulse laser in a timedependent field for different physical parameters. by analyzing the total excited population using a double-pulse laser, we can uncover all the closed orbits existing in the system. We demonstrate that this can be realized by scanning the first pulse position and the time delay between the two pulses.

关键词： double-pulse laser detection of closed orbits photodetachment spectra time-dependent systems

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

在线全文

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

A carbuncle cure for the Harten-lax-van leer contact(HllC)scheme using a novel velocity-based sensor

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2021年第9期42卷 1259-1278页

作者： u.s.VEVEK b.ZANG T.H.NEW Department of Mechanical Materials and Aerospace EngineeringUniversity of LiverpoolLiverpool L693BXUnited Kingdom Department of Aerospace Engineering University of BristolBristol BS81TRUnited Kindgdom school of Mechanical and Aerospace Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

A hybrid numerical flux scheme is proposed by adapting the carbunclefree modified Harten-lax-van leer contact(HllCM) scheme to smoothly revert to the Harten-lax-van leer contact(HllC) scheme in regions of shear. This hybrid scheme, referred to as the HllCT scheme, employs a novel, velocity-based shear sensor. In contrast to the non-local pressure-based shock sensors often used in carbuncle cures, the proposed shear sensor can be computed in a localized manner meaning that the HllCT scheme can be easily introduced into existing codes without having to implement additional data structures. Through numerical experiments, it is shown that the HllCT scheme is able to resolve shear layers accurately without succumbing to the shock instability.

关键词： carbuncle shock instability Euler equation numerical flux Harten-laxvan leer contact(HllC)scheme

A statistical Mechanical Analysis on the bound state solution of an Energy-Dependent Deformed Hulthén Potential Energy

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2019年第9期71卷 1127-1138页

作者： b.C.lütfüoglu A.N.Ikot u.s.Okorie A.T.Ngiangia Department of Physics Faculty of ScienceAkdeniz University07058AntalyaTurkey Department of Physics Faculty of ScienceUniversity of Hradec KraloveRokitanskeho6250003Hradec KraloveCzechia Department of Physics Theoretical Physics GroupUniversity of Port HarcourtChobaPort HarcourtNigeria Department of Physics Akwa Ibom State UniversityIkot AkpadenP.M.B.1167UyoNigeria

In this article, we investigate the bound state solution of the Klein Gordon equation under mixed vector and scalar coupling of an energy-dependent deformed Hulthén potential in D dimensions. We obtain a transcendental equation after we impose the boundary conditions. We calculate energy spectra in four different limits and in arbitrary dimension via the Newton-Raphson method. Then, we use a statistical method, namely canonical partition function, and discuss the thermodynamic properties of the system in a comprehensive way. We find out that some of the thermodynamic properties overlap with each other, some of them do not.

关键词： Klein-Gordon equation energy-dependent deformed Hulthén potential energy bound state solution thermodynamic properties

Periodic Algebras Generated by Groups

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2015年第4期22卷 541-554页

作者： s. Albeverio b.A. Omirov u.A. Rozikov Institut fur Angewandte Mathematik and HCM universitat bonn Bonn Germany Institute of Mathematics 29 Do'rmon Yo'li str. 100125 Tashkent Uzbekistan

We consider algebras with basis numerated by elements of a group G. We fix a function f from G × G to a ground field and give a multiplication of the algebra which depends on f. We study the basic properties of such algebras. In particular, we find a condition on f under which the corresponding algebra is a leibniz algebra. Moreover, for a given subgroup G of G we define a G-periodic algebra, which corresponds to a G-periodic function f, we establish a criterion for the right nilpotency of a G-periodic algebra. In addition, for （7 = Z we describe all 2Z- and 3Z-periodic algebras. some properties of nZ-periodic algebras are obtained.

关键词： periodic algebra leibniz algebra group

study of residual stresses and distortions from the Ti6Al4V based thinwalled geometries built using lPbF process

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2023年第10期28卷 33-41页

作者： Jagatheeshkumar s Raguraman M siva Prasad AVs Nagesha b K Chandrasekhar u Indian Institute of Information Technology Design and Manufacturing KancheepuramChennai 600127India Gas Turbine Research Establishment DRDOBengaluru 560093India Wipro3D Bengaluru560058India

The current paper focuses on the prediction of residual stresses and distortions in the laser Powder bed Fusion(lPbF)built Ti6Al4V thin-walled geometries using Ansys Additive Print(AAP)software which employs a layer-by-layer accumulation of inherent strain to calculate the *** and anisotropic strain scaling factors were calibrated initially within the APP software for the Ti6Al4V based single cantilever beam ***,the numerical simulations were performed in APP software and computed the residual stresses and distortions for the varied process parameters including laser power,scan speed and hatch distance while maintaining the layer thickness constant for all the design *** numerical predictions were compared;they were found to match reasonably well with the XRD measurements within the calibrated regime.

关键词： Ti6Al4V Thin-walled geometry Residual stress Inherent strain XRD Ansys additive print

Phytochemically Functionalized Cu and Ag Nanoparticles Embedded in MWCNTs for Enhanced Antimicrobial and Anticancer Properties

在线全文

学校读者我要写书评

暂无评论

Nano-Micro letters 2016年第2期8卷 120-130页

作者： s.Yallappa J.Manjanna b.l.Dhananjaya u.Vishwanatha b.Ravishankar H.Gururaj P.Niranjana b.s.Hungund Department of Industrial Chemistry Kuvempu University Department of Chemistry Rani Channamma University Toxicology and Drug Discovery Centre for Emerging Technologies Jain University sDM Centre for Research in Ayurveda and Allied sciences Department of Electronics Kuvempu University Department of biochemistry Kuvempu University Department of biotechnology B.V.B.College of Engineering & Technology

Nanomedicine is an emerging field concerned with the use of precision engineered nanomaterials, which leads to the development of novel remedial and diagnostic modalities for human use. In this study, Cu(NO_3)_2 and Ag NO_3 precursors were reduced to copper nanoparticles(Cu NPs) and silver nanoparticles(Ag NPs) using Terminalia arjuna bark extracts under microwave irradiation in the presence of well-dispersed multi-walled carbon nanotubes(MWCNTs) in aqueous medium. The formation of Cu NPs or Ag NPs and their functionalization with MWCNTs via bioactive molecules of plant extract were evidenced from uV–Vis spectra, XRD, FTIR, FEsEM, EDX, and TEM images. The phytochemically functionalized Cu-MWCNTs and Ag-MWCNTs nanomaterials showed enhanced biocide activity, and the inhibitory activity for bacteria was higher than that of fungus. Furthermore, these biohybrid nanomaterials are non-toxic to normal epithelial cells(Vero), whereas they are highly toxic for tested human cancer cells of MDA-Mb-231, He la, si Ha, and Hep-G2. The cell viability was found to decrease with the increasing dose from 10 to 50 lg m l^(-1), as well as incubation time from 24 to 72 h. For instance, the cell viability was found to be *91 % for normal Vero cells and *76 % for cancer cells for lower dose of 10 lg m l^(-1).

关键词： Cu-MWCNTs Ag-MWCNTs Terminalia arjuna bark extract Antimicrobial activity Anticancer activity

In search of a pan-coronavirus vaccine:next-generation vaccine design and immune mechanisms

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2024年第2期21卷 103-118页

作者： s.Cankat M.u.Demael l.swadling Division of Infection and Immunity Institute of Immunity and TransplantationUniversity College LondonPears BuildingLondon NW32PPUK

Members of the coronaviridae family are endemic to human populations and have caused several epidemics and pandemics in recent *** this review,we will discuss the feasibility of and progress toward the ultimate goal of creating a pan-coronavirus vaccine that can protect against infection and disease by all members of the coronavirus *** will detail the unmet clinical need associated with the continued transmission of sARs-CoV-2,MERs-CoV and the four seasonal coronaviruses(HCoV-OC43,Nl63,HKu1 and 229E)in humans and the potential for future zoonotic *** will highlight how first-generation sARs-CoV-2 vaccines and natural history studies have greatly increased our understanding of effective antiviral immunity to coronaviruses and have informed next-generation vaccine *** will then consider the ideal properties of a pan-coronavirus vaccine and propose a blueprint for the type of immunity that may offer ***,we will describe a subset of the diverse technologies and novel approaches being pursued with the goal of developing broadly or universally protective vaccines for coronaviruses.

关键词： Vaccine Coronavirus Cross-reactive immunity Cross-protection universal