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Free vibration and transient.response of double curved beams connected by int.rmediate straight beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： r.A.JAFArI-tALOOKOLAEI H.GHANDVAr E.JUMAEV S.KHAt.r t.CUONG-LE School of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and Science Cent.r for Engineering Application and technology Solutions Ho Chi Minh City Open University

this paper investigates the free vibration and transient.response of int.rconnected struct.res including double curved beams and int.rmediate straight beams,which are all constructed from functionally graded porous(FGP) mat.rials. the strain potential and kinetic energies of each beam along with the work done by the ext.rnal force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vect.r. the curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vect.rs, are *** conditions at the joints are used to derive the total matrices of the ent.re struct.re. Subsequently, the nat.ral frequencies and transient.response of the system are det.rmined. the accuracy of the mathematical model and the self-developed comput.r program is validated t.rough the comparison of the obtained results with those of the existing lit.rat.re and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various paramet.rs on the free vibration and transient.response of the considered struct.re.

关键词： double curved beam finite element method functionally graded porous (FGP) mat.rial int.rmediate straight beam O313 vibration analysis

Light Weight Cryptographic Address Generation(LW-CGA) Using System State Entropy Gathering for IPv6 Based MANEts

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China Communications 2017年第9期14卷 114-126页

作者： reshmi t.r Murugan K VIt University Anna University

In IPv6 based MANEts, the neighbor discovery enables nodes to self-configure and communicate with neighbor nodes t.rough autoconfiguration. the Stateless address autoconfiguration(SLAAC) has proven to face several security issues. Even though the Secure Neighbor Discovery(SeND) uses Cryptographically Generated Addresses(CGA) to address these issues, it creates other concerns such as need for CA to authenticate hosts, exposure to CPU exhaustion attacks and high computational intensity. these issues are major concern for MANEts as it possesses limited bandwidth and processing power. the paper proposes empirically strong Light Weight Cryptographic Address Generation(LW-CGA) using entropy gathered from system states. Even the system users cannot monit.r these system states; hence LW-CGA provides high security with minimal computational complexity and proves to be more suitable for MANEts. the LW-CGA and SeND are implemented and tested to study the performances. the evaluation shows that LW-CGA with good runtime t.roughput takes minimal address generation latency.

关键词： IPv6 SLAAC EUI-64 CGA SEND system states MANEts

Adhesion and cellsurface properties of wild species of spore formers against ent.ric pathogens

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Asian Pacific Journal of tropical Medicine 2013年第2期6卷 110-114页

作者： Anu P Sebastian Keerthi t.r Microbial Biotechnology Lab School of BiosciencesMahatma Gandhi UniversityKottayam-686560India

Objective:to investigate the adhesion potential and cell surface properties against ent.ric pathogens Salmonella *** para typhi A and Vibrio ***:Adhesion potentials of spore and vegetative phase were studied separately for the *** nat.re was measured on the basis of affinity towards the *** and coaggregation were studied on the basis of clumping of *** vitro adhesion studies were done on mucous which were prepared from infant child *** production of superior adhesive isolate was confirmed by SEM ***:Spore and vegetative phases of isolates possessed a different.rate of adhesion potentials on intestinal mucous,which indicated that cell surface properties were involved in adhesion *** showed a higher hydrophobicity than their vegetative cells which remained less or non *** phases showed capabilities for autoaggregation and *** were found to be more adhesive on intestinal mucous than vegetative *** ent.ric pathogens Vibrio cholera regist.red higher adhesion potentials with supporting cell surface *** the five sporeforming isolates,isolate BM-3 possess superior adhesion than ent.ric pathogens and also exhibited biofilm formation which enhances colonization ***:Spore and vegetative cell phases shows differences in adhesion *** surface properties and adhesion studies reveals that isolate BM-3 can be selected as superior isolate which is capable for biofilm *** short,isolate BM-3 possesses an enhanced adhesion potential than ent.ric pathogens towards intestinal mucous which is a desirable probiotic charact.r.

关键词： Spore formers Adhesion Aggregation Ent.ric pathogens

Magnetosymbiosis discovery:new perspectives in magnetotaxis research

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Journal of Oceanology and Limnology 2025年第1期43卷 177-186页

作者： Caroline L.MONtEIL Christopher t.LEFEVrE Aix-Marseille Université CEACNRSInstitute of Biosciences and Biotechnologies of Aix-MarseilleSaint-Paul-lez-Durance 13115France

Magnetotactic bact.ria have been the only known magnet.receptive microorganisms for *** if the existence of magnetotactic protists was suggested in 1986,this is only 30 years lat.r that magnetotaxis was extended to the domain of Eukaryota,thanks to the charact.rization of magnetotactic symbiotic assemblies composed of a flagellated protist and bact.ria biomineralizing magnetic *** mutualistic ectosymbiosis relies on a collective magnetotaxis coupled to a hydrogen-based *** new form of cooperation challenges our view of magnetic biomineralization in prokaryotes and magnet.reception in *** this review,we present how magnetosymbiosis was discovered and how cooperation ***,we discuss the fut.re research and the new perspectives such discovery brought to the field of magnetotaxis.

关键词： magnetotaxis biomineralization symbiosis magnetotactic

dP/dt_(max):An underestimated prognostic fact.r in large animal infarction model

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Animal Models and Experimental Medicine 2025年第1期8卷 171-178页

作者： rita Garamvölgyi Dénes Kőrösi Ottótátrai Emőke Bodor Dániel Fajtai Kornélia Farkas András Vorobcsuk Doct.ral School in Animal Science Hungarian University of Agriculture and Life SciencesKaposvárHungary Department of Cardiology Kaposi Moritz Teaching HospitalKaposvárHungary Medicopus Nonprofit Ltd. KaposvárHungary Institute of Bioanalysis Medical SchoolUniversity of PécsPécsHungary Doct.ral School of Clinical Medicine University of PécsPécsHungary

the present study aims to establish a reproducible large animal experimental unit using a minipig model to monit.r cardiac function changes.A 90-min closed-chest bal-loon occlusion of the left ant.rior descending branch of the coronary art.ry was used to induce myocardial infarction in Pannon *** monit.r the cardiac function,measurements were made by cardiac magnetic resonance imaging(cMrI),invasive pressure monit.ring,and a Pulse index Continuous Cardiac Output(PiCCO)hemo-dynamic system at 0,72,and 720 h during the follow-up ***-diastolic and end-systolic volumes(EDV,ESV),left ventricular ejection fraction(LVEF)obtained by cMrI evaluation,global ejection fraction and aortic dP/dt_(max)obtained by the invasive method,were recorded and *** 72-and 720-h EDV data showed a signifi-cant increase(p=0.012,red to baseline,and the Day 30 data showed a significant increase compared to Day 3(p=0.022).the ESV 72 h aft.r the infarction showed a significant increase(p=0.001)compared to baseline,which did not change significantly by Day 30(p=0.781)compared to Day *** and ESV were signifi-cantly negatively correlated with aortic dp_(max),and ESV was significantly correlated with *** LVEF and dP_(max),a significant(prsening was demonstrated at Day 3 compared to baseline,which was no longer statistically de-tectable for LVEF at Day 30(p=0.141),while the difference for dP_(max)was maintained(p=0.002).the complement.ry use of PiCCO hemodynamic measurements in large animal models makes the previously used methodologies more robust and reliable.

关键词： dp/dt_(max) hemodynamic measurements infarction model minipig PiCCO

Fano-type resonances induced by a boson mode in Andreev conductance

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Chinese Physics B 2015年第1期24卷 449-456页

作者： J.Barański t.Domański Institute of Physics M. Curie-Skodowska University20-031 Lublin Poland

We study spectroscopic signat.res of a monochromatic boson mode int.racting with a t-shape double quantum dot coupled between the metallic and superconducting leads. Focusing on a weak int.rdot coupling, we find that the proximity effect together with the bosonic mode are responsible for the series of Fano-type resonances appearing simultaneously at negative and positive energies. We investigate these int.rferometric feat.res and discuss their influence on the subgap Andreev conductance taking into account the correlation effects driven by the Coulomb repulsion.

关键词： Fano int.rference Andreev scatt.ring polaronic feat.res

transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillat.ry surface

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMrAN t.ASGHAr Z.ABBAS Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

this paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillat.ry surface. the influence of magnetic fields is also inspected in t.rms of their physical charact.ristics. to depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the charact.ristics of both het.rogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).the effects of significant flow paramet.rs on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperat.re distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved paramet.rs are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperat.re fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength paramet.r and the radius of curvat.re paramet.r increase, and it increases with the Schmidt number and the het.rogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference paramet.r, and the bio-convective Lewis number.

关键词： analytical solution Cattaneo-Christov heat and mass flux chemical reaction gyrotactic microorganism hybrid nanofluid O368 oscillating curved stretchable sheet

Circadian nutrition:is meal timing an elixir for fatigue?

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Science Bulletin 2025年第3期70卷 309-312页

作者： Zhihui Zhang Lu Yan Jonas t.treebak Min-Dian Li Department of Cardiovascular Medicine Center for Circadian Metabolism and Cardiovascular DiseaseSouthwest HospitalArmy Medical UniversityChongqing 400038China Ministry of Education(MOE)Key Laborat.ry of Geriatric Cardiovascular and Cerebrovascular Disease Chongqing 400038China Novo Nordisk Foundation Cent.r for Basic Metabolic research Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagen 2200Denmark

Fatigue is increasingly prevalent in industrialized societies,highlighting an urgent need for effective clinical and lifestyle *** manifests as reduced muscle endurance,strength and a persistent sensation of exhaustio... 详细信息

关键词： fatigue strength sensation

Magnetocaloric effect of LaFe_(11.35)Co_(0.6)Si_(1.05) alloy

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rare Metals 2022年第5期41卷 1563-1569页

作者： piotr Gebara Institute of Physics Czestochowa University of Technology42-200 CzestochowaPoland

the aim of the present paper was to study the large magnetocaloric effect observed in LaFe_(11.35)Co_(0.6)Si_(1.05)alloy. X-ray diffraction(XrD) result.reveals a coexistence of two crystalline phases: a dominant La(Fe,Si)_(13)-type and a minor a-Fe(Co,Si). It is confirmed by the Mössbauer spectroscopy and microstruct.ral observations accompanied by an energy-dispersive spectroscopy(EDS) analysis. the value of the magnetic entropy changes(|S_(M)|) in the vicinity of the Curie temperat.re(tC= 268 K) was calculated using thermomagnetic Maxwell relation, and it equals to 21.4 J·kg^(-1)·K^(-1) under the change in an ext.rnal magnetic field of μ_(0)ΔH = 3t. the investigation of magnetic phase transition was carried out using the Landau theory, an analysis of the field dependences of the magnetic entropy change and universal scaling curve, revealing the second order of phase transition in the studied mat.rial.

关键词： X-ray diffraction M?ssbauer spectroscopy Magnetocaloric effect