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Applied Mathematics and Mechanics(English Edition) 2015年第11期36卷 1449-1458页

作者： M.HATAMI s.E.GHAsEMI s.A.R.sAHEBI s.MOsAYEBIdORCHEH d.d.GANJI J.HATAMI department of Mechanical Engineering Esfarayen University of Technology Young Researchers and Elite Club Islamic Azad University deptartment of Mechanical Engineering Islamic Azad University department of Mechanical Engineering Babol University of Technology Garmsar Health & Care Center Semnan University of Medical Sciences

In this paper, a non-Newtonian third-grade blood in coronary and femoral arteries is simulated analytically and numerically. The blood is considered as the third- grade non-Newtonian fluid under the periodic body acceleration motion and the pulsatile pressure gradient. The hybrid multi-step differential transformation method （Hybrid-Ms- dTM） and the Crank-Nicholson method （CNM） are used to solve the partial differential equation （PdE）, and a good agreement between them is observed in the results. The effects of the some physical parameters such as the amplitude, the lead angle, and the body acceleration frequency on the velocity and shear stress profiles are considered. The results show that increasing the amplitude, Ag, and reducing the lead angle of body acceleration, 9, make higher velocity profiles on the center line of both arteries. Also, the maximum wall shear stress increases when Ag increases.

关键词： pulsatile blood third-grade non-Newtonian fluid differential transforma-tion method (dTM) femoral artery coronary artery

Flexible ultra-thin super-resolution endoscopy

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science China(Physics,Mechanics & Astronomy) 2024年第3期67卷 171-172页

作者： George s.d.Gordon department of Electrical and Electronic Engineering University of NottinghamNottingham NG7 2RDUK

In recent years, multimode fiber(MMF) has become an important tool for high-resolution endoscopic imaging in narrow channels(e.g., in the brain via needles or inside blood vessels) due to its high mode density and fine diameter, typically stacle to widespread deployment in applications is that realistic perturbations, including bending, twisting and changes in temperature, cause unacceptable image degradation.

关键词： fiber resolution typically

Effects of laser phase transformation hardening parameters on heat input and hardened-bead profile quality of unalloyed titanium

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Transactions of Nonferrous Metals society of China 2010年第6期20卷 1078-1091页

作者： d.s.BAdKAR K.s.PANdEY G.BUVANAsHEKARAN Maulana Azad National Institute of Technology Welding Research Institute Bharat Heavy Electricals Limited

Laser transformation hardening(LTH)of unalloyed titanium of 1.6 mm-thick sheet,nearer to AsTM Grade 3 of chemical composition was investigated using 2 kW CW Nd:YAG *** effects of laser power(750-1 250 W),scanning speed(1 000-3 000 mm/min)and focal point position(from-10 to-30 mm)on the heat input,and hardened-bead geometry(*** bead width(HBW),hardened depth(Hd)and angle of entry of hardened bead profile with the surface(AEHB))were investigated using response surface methodology(RsM).The experimental plan is based on Box-Behnken design matrix *** and quadratic polynomial equations for predicting the heat input and the hardened bead geometry were *** results indicate that the proposed models predict the responses adequately within the limits of hardening parameters being *** is suggested that regression equations can be used to find optimum hardening conditions for desired criteria.

关键词： laser transformation hardening response surface methodology(RsM) unalloyed titanium titanium hardened-bead profile

Genotoxicity of Pesticide Waste Contaminated soil and Its Leachate

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Biomedical and Environmental sciences 2004年第3期17卷 257-265页

作者： s.d.sIVANEsAN K.KRIsHNAMURTHI s.d.WACHAsUNdER T.CHAKRABARTI Environmental Biotechnology division Environmental Biotechnology DivisionInstrumentation Division National Environmental Engineering Research Institute Nehru Marg Nagpur-440 020 IndiaEnvironmental Biotechnology Division

Objective Improper land disposal of hazardous waste can result in leaching of hazardous constituents which may contaminate ground and surface water leading to adverse impact on human health and environment consequences. The present study utilized mammalian cell culture for the genotoxicity assessment of waste and its leachate. Methods Genotoxic potential and chemical analysis of pesticide derived tarry waste contaminated soil extract and its leachate was assessed using in vitro human lymphocyte cultures and GC-Ms. Results The investigation revealed that the soil extract could cause significant to highly significant genotoxicity in the form of dNA strand break at 25 mL (Pd 200 mL (Pd chromosomal aberration at 25 mL (Pd 50 mL and 100 mL (Pd cause significant dNA strand break and chromosomal aberration only at 100 mL and 200 mL (Pdose levels. Conclusion The genotoxicity observed is attributed to carbaril and tetra methyl naphthyl carbamate, the major ingredients of the extracts, as revealed by GC-Ms.

关键词： Genotoxicity soil extract Leachate dNA strand break Chromosomal aberration Gas chromatography mass spectrometery (GC-Ms) Fluorimetric analysis of dNA unwinding assay (FAdU)

Influence of the shell effects on evaporation residue cross section of superheavy nuclei

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Nuclear science and Techniques 2018年第11期29卷 229-237页

作者： d.Naderi s.A.Alavi department of Physics Faculty of Basic SciencesRazi University department of Physics University of Sistan and Baluchestan

In order to study the influence of the shell effects on the formation and fission of superheavy elements, we applied multidimensional Langevin equations. The evaporation residue cross sections have been calculated for 3n, 4n, and 5n evaporation channels using three(K = 0)-and four(K ≠ 0)-dimensional Langevin equations. Calculations were done for ^(48)Ca + ^(238)U and ^(48)Ca + ^(244)Pu hot fusion reactions with 3n, An evaporation channels and ^(70)Zn+ ^(208)Pb, and ^(54)Cr + ^(209)Bi cold fusion reactions with In and 2n evaporation channels. The calculations were performed for An and 5n evaporation channels of the ^(26)Mg+ ^(238)U reaction, as well. Our results show that with increasing dimension of Langevin equations the residue cross section increases, whereas the fission cross section decreases. The obtained results with four-dimensional Langevin and considering shell effects are in better agreement with experimental data in comparison with three-and four-dimensional Langevin equations without shell effects.

关键词： superheavy Langevin equations Cross section

Testosterone and cardiovascular disease in men

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Asian Journal of Andrology 2012年第3期14卷 428-435,I0007页

作者： Paul d Morris Kevin s Channer sheffield Teaching Hospital NHs Trust Sheffield S10 2JF UK

despite regional variations in the prevalence of coronary artery disease （CAd）, men are consistently more at risk of developing and dying from CAd than women, and the gender-specific effects of sex hormones are implicated in this inequality. This ＇Perspectives＇ article reviews the current evidence regarding the cardiovascular effects of testosterone in men including an examination of the age-related decline in testosterone, the relationship between testosterone levels and coronary disease, coronary risk factors and mortality. We also review the vaso-active effects of testosterone, and discuss how these have been used in men with heart failure and angina. We discuss the ＇cause＇ versus ＇effect＇ controversy, regarding low testosterone levels in men with coronary heart disease, as well as concerns over the use of testosterone replacement therapy in middle aged and elderly men. The article concludes with a discussion regarding the future direction for work in this interesting area, including the relative merits of screening for, and treating hypogonadism with testosterone replacement therapy in men with heart disease.

关键词： atherosclerosis chronic heart failure ischaemic heart disease replacement therapy testosterone

Analysis of Λ_b →Λl^+l^- rare decays in a non-universal Z’ model

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Chinese Physics C 2017年第8期41卷 9-18页

作者： d.Banerjee s.sahoo department of Physics National Institute of TechnologyDurgapur-713209West BengalIndia

We investigate the rare baryonic Λ_b→Λl^＋l^- decays in a non-universal Z＇ model, which is one of the wellmotivated extensions of the standard model（sM）. Considering the effects of Z-mediated flavour-changing neutral currents（FCNCs） we analyse the differential decay rate, forward-backward asymmetries and lepton polarisation asymmetries for the Λb→Λl^＋l^- decays. We find significant deviations from their sM predictions, which could indicate new physics arising from the Z gauge boson.

关键词： Z' boson baryonic decays flavour-changing neutral currents heavy quark effective theory modelsbeyond the standard model

Modelling of nanostructured TiO_2-based memristors

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Journal of semiconductors 2015年第3期36卷 52-54页

作者： s.s.shinde T.d.dongle shivaji University Korea Research Institute of standards and science

The fourth fundamental circuit element memristor completes the missing link between charge and mag- netic flux. It consists of the function of the resistor as well as memory in nonlinear fashion. The property of the memristor depends on the magnitude and direction of applied potential. This unique property makes it the primi- tive building block for many applications such as resistive memories, soft computing, neuromorphic systems and chaotic circuits etc. In this paper we report TiO2-based nanostructured memristor modelling. The present memris- tor model is constructed in MATLAB environment with consideration of the linear drift model of memristor. The result obtained from the linear drift model is well matched with earlier reported results by other research groups.

关键词： memristor linear drift model TiO2

Titanium Technology in the UsA - an Overview

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Journal of Materials science & Technology 2001年第4期17卷 439-443页

作者： d.Eylon s.R.seagle GraduateMaterialsEngineering UniversityofDaytonDaytonOhio45469USA Consultant 60HeronCircleCortlandOH44410USA

The state of Ti research, development and industry is reviewed in this article. The fifty-year anniversary of Ti technology commercialization in the UsA provides an opportunity for a historical perspective. Incorporation of 'information-age' tools into alloy development, processing, and production invigorates the technology. Consolidation, diversification and globalization have been transforming the Ti industry in the recent years.

关键词： Titanium

Interacting tachyonic scalar field

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Communications in Theoretical Physics 2021年第2期73卷 102-107页

作者： A Kundu s d Pathak V K Ojha department of Physies Lovely Professional UniversityPhagwaraPunjab144411India school of sciences SAGE University BhopalMadhya Pradesh462022India

We discuss the coupling between dark energy and matter by considering a homogeneous tachyonic scalar field as a candidate for dark *** obtained the functional form of scale factor by assuming that the coupling strength depends linearly on the Hubble parameter and energy *** also estimated the cosmic age of the Universe for different values of coupling constant.

关键词： dark energy dark matter scalar field achyonic scalar field