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Journal of Ocean Engineering and Science 2023年第3期8卷 263-277页

作者： shishir gupta Rachaita Dutta Soumik Das Department of Mathematics and Computing Indian Institute of Technology(ISM)DhanbadJharkhand 826004India

The present study enlightens the two-dimensional analysis of the thermo-mechanical response for a mi-cropolar double porous thermoelastic material with voids(MDPTMWV)by virtue of Eringen’s theory of nonlocal ***-Gibson-Thompson(MGT)heat equation is introduced to the considered model in the context of memory-dependent derivative and variable *** employing the normal mode technique,the non-dimensional coupled governing equations of motion are solved to determine the an-alytical expressions of the displacements,temperature,void volume fractions,microrotation vector,force stress tensors,and equilibrated stress *** two-dimensional graphs are presented to demon-strate the influence of various parameters,such as kernel functions,thermal conductivity,and ***,different generalized thermoelasticity theories with variable conductivity are compared to visualize the variations in the distributions associated with the prior mentioned *** particu-lar cases are also discussed in the presence and absence of different parameters.

关键词： Memory-dependent derivative Eringen’s nonlocal elasticity theory Micropolar double porous thermoelastic material with voids Moore-Gibson-Thompson thermoelasicity Variable conductivity

Cardiovascular outcomes and mortality after abnormal myocardial perfusion scans in the elderly:a retrospective study at a tertiary care institution

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Journal of Geriatric Cardiology 2023年第10期20卷 760-761页

作者： shishir gupta Sohum Sheth Sujay Kamisetty Marco Foreman David Winchester University of Florida College of Medicine GainesvilleUSA Malcom Randall Veterans Affairs Medical Center GainesvilleUSA

While the diagnostic and prognostic utility of single photon emission computed tomography(SPECT)myocardial perfusion scan(MPS)has been well established,[1,2]there is a paucity of literature evaluating SPECT MPS in elderly ***,it is unclear whether the prognostic value of MPS diminishes as patients get *** conducted this study to evaluate the role of SPECT MPS in risk-stratifying a large sample of elderly patients with or without known coronary artery disease(CAD)and hypothesized that abnormal MPS in patients over 75 years would be associated with a greater risk of all-cause mortality and major adverse cardiac events.

关键词： mortality perfusion coronary

INFLUENCE OF RIGID BOUNDARY ON THE LOVE WAVE PROPAGATION IN ELASTIC LAYER WITH VOID PORES

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Acta Mechanica Solida Sinica 2013年第5期26卷 551-558页

作者： Sumit Kumar Vishwakarma shishir gupta Dinesh Kumar Majhi Department of Applied Mathematics Indian School of Mines Department of Mathematics Birla Institute of Technology and Science

In this paper, a mathematical model for Love wave propagation in a porous elastic layer under a rigid boundary resting over a poro-elastic half-space has been developed. The study shows that such a medium transmits two types of Love waves. The first front depends on the change in volume fraction of the pores whereas the second front depends upon the modulus of rigidity of the elastic matrix of the medium and is the same as the Love wave in an elastic layer over an elastic half-space. It is observed that the first front is many times faster than the shear wave in the medium with void pores due to the change in the volume fraction of the pores and is significant.

关键词： Love waves void pores volume fraction rigid boundary wave front

Effect of Point Source, Self-Reinforcement and Heterogeneity on the Propagation of Magnetoelastic Shear Wave

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Applied Mathematics 2011年第3期2卷 271-282页

作者： Amares Chattopadhyay shishir gupta Abhishek K. Singh Sanjeev A. Sahu 不详

This paper investigates the propagation of horizontally polarised shear waves due to a point source in a magnetoelastic self-reinforced layer lying over a heterogeneous self-reinforced half-space. The heterogeneity is caused by consideration of quadratic variation in rigidity. The methodology employed combines an efficient derivation for Green’s functions based on algebraic transformations with the perturbation approach. Dispersion equation has been obtained in the closed form. The dispersion curves are compared for different values of magnetoelastic coupling parameters and inhomogeneity parameters. Also, the comparative study is being made through graphs to find the effect of reinforcement over the reinforced-free case on the phase velocity. It is observed that the dispersion equation is in assertion with the classical Love-type wave equation in the absence of reinforcement, magnetic field and heterogeneity. Moreover, some important peculiarities have been observed in graphs.

关键词： Shear Wave Magnetoelastic Self-Reinforcement Dispersion Equation Seismic Wave

G-Type Seismic Wave in Magnetoelastic Monoclinic Layer

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Applied Mathematics 2011年第2期2卷 145-154页

作者： Amares Chattopadhyay shishir gupta Abhishek K. Singh Sanjeev A. Sahu 不详

This paper deals with the study of propagation of G type waves along the plane surface at the interface of two different types of media. The upper medium is taken as monoclinic magnetoelastic layer whereas the lower half-space is inhomogeneous isotropic. Dispersion equation and condition for maximum energy flow near the surface are obtained in compact form. The dispersion equation is in assertion with the classical Love-type wave equation for the isotropic case. Effect of magnetic field and inhomogeneity on phase velocity and variation of group velocity with scaled wave number has been depicted by means of graphs. It is observed that inhomogenetity decreases phase velocity and the magnetic field has the favouring effect. A comparative study for the case of isotropic layer and monoclinic layer over the same isotropic inhomogeneous half space has been made through graphs.

关键词： G-Waves Magnetoelastic Dispersion Equation Monoclinic Transform Technique

Propagation of Torsional Surface Waves under the Effect of Irregularity and Initial Stress

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Applied Mathematics 2011年第12期2卷 1453-1461页

作者： shishir gupta Dinesh K. Majhi Sumit K. Vishwakarma Santimoy Kundu 不详

The present paper has been framed to study the influence of irregularity, initial stress and porosity on the propagation of torsional surface waves in an initially stressed anisotropic poro-elastic layer over a semi-infinite heterogeneous half space with linearly varying rigidity and density due to irregularity at the interface. The irregularity has been taken in the half-space in the form of a parabola. It is observed that torsional sur- face waves propagate in this assumed medium. In the absence of irregularity the velocity of torsional surface wave has been obtained. Further, it has been seen that for a layer over a homogeneous half space, the velo- city of torsional surface waves coincides with that of Love waves.

关键词： Irregularity Torsional Surface Waves Anisotropic Initial Stress

Influence of Rigid Boundary and Initial Stress on the Propagation of Love Wave

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Applied Mathematics 2011年第5期2卷 586-594页

作者： shishir gupta Amares Chattopadhyay Sumit K. Vishwakarma Dinesh K. Majhi 不详

In the present paper we study the effect of rigid boundary on the propagation of Love waves in an inhomogeneous substratum over an initially stressed half space, where the heterogeneity is both in rigidity and density. The dispersion equation of the phase velocity has been derived. It has been found that the phase velocity of Love wave is considerably influenced by the rigid boundary, inhomogeneity and the initial stress present in the half space. The velocity of Love waves have been calculated numerically as a function of KH (where K is a wave number H is a thickness of the layer) and are presented in a number of graphs.

关键词： Love Waves Initial Stress Heterogeneous Half-Space Rigid Boundary Phase Velocity

Role of locking plates in treatment of difficult ununited fractures： a clinical study

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Chinese Journal of Traumatology 2013年第1期16卷 22-26页

作者： Ashok Kumar Himanshu gupta Chandra Shekhar Yadav Shah Alam Khan shishir Rastogi Dubai Bone & Joint Center Mohammed Bin Rashid AIMakotoum Academic Medical Center Dubai HealthCarecity Dubai 118855 UAE Department of Orthopaedics All India Institute of Medical Sciences Ansari Nagar New Delhi 110029 India

我们在长骨头与锁在长骨头破裂的 10 困难的 nonunions 锁板固定的 plateMethodsRetrospective 评估折断的困难的 ununited 的处理的经验被做的在场的 ObjectiveTo。固定为大腿骨的柄骨折( 3 个病人)用完了锁住的板腿节的 supracondylar... 详细信息

我们在长骨头与锁在长骨头破裂的 10 困难的 nonunions 锁板固定的 plateMethodsRetrospective 评估折断的困难的 ununited 的处理的经验被做的在场的 ObjectiveTo。固定为大腿骨的柄骨折( 3 个病人)用完了锁住的板腿节的 supracondylar 骨折(差距不属于工会)两根前臂骨头(半径和尺骨)的锁骨骨折的骨折胫骨的骨干的肱骨骨折的柄的尺骨骨折的骨折和肱骨的 supracondylar 骨折(一耐心的各个)。五破裂有超过一以前的没有通过的内部固定。一个病人感染了不属于工会它被清创术管理，演员组固定与在六个星期锁板由固定列在后面。七破裂是衰退的二是寡营养的，一个人是 hypertrophic。腓骨的自体移植在 2 种情况和在所有 patientsResultsMinimum 后续使用的肠骨的冠 cancellous 骨头接枝中被使用是 6 ；月(范围， 6 ；月到 2.5 ；年) 。联合的平均时间是 3.4 ；月(范围 2.5 ～ 6 ；月) 。任何一个都没与与锁压缩板，过细的软织物解剖，可接受的减小，好固定技术和骨头 grafting 完成稳定性病人让板相关的复杂并发症或手术后的创伤 *** 能帮助在困难的不属于工会的盒子中完成联合。尽管锁住的板不由自己做，保证多骨的联合，我们发现了它是我们为对待困难的破裂 nonunions 的一套设备的另一有用增加。

关键词：长骨骨折固定治疗钢板锁定临床不愈合伤口感染固定技术

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几种沙棘果实与种子中脂肪酸成分分析

国际沙棘研究与开发 2004年第3期2卷 1-8页

作者： Virendra Singh Rajesh Kr.gupta shishir Tandon R.C.Sawhney CSK喜马偕尔邦农业大学农业研究与推广中心防护生理应用研究所

对来自拉浩地区 (半干旱地区 )与斯皮特 (干旱地区 )的 8年生沙棘种子与果肉粗提物中脂肪酸组成进行了研究。所选的中亚沙棘产自拉浩与斯皮特 ,同时研究的还有来自拉浩地区的柳叶沙棘与HI 1型沙棘 (外来品种 ) ,该外来品种种植在喜马偕... 详细信息

对来自拉浩地区 (半干旱地区 )与斯皮特 (干旱地区 )的 8年生沙棘种子与果肉粗提物中脂肪酸组成进行了研究。所选的中亚沙棘产自拉浩与斯皮特 ,同时研究的还有来自拉浩地区的柳叶沙棘与HI 1型沙棘 (外来品种 ) ,该外来品种种植在喜马偕尔邦农业大学高山农业研究与推广中心。该研究中心位于拉浩斯皮特地区的拉浩谷地的库坎姆西瑞 (海拔 2 730m) ,处于印度温和干燥的喜马拉雅山地区。在所有种类的果肉油脂中 ,不饱和脂肪酸含量的比例 (5 2 8%～ 6 0 7% )高于饱和脂肪酸 (10 6 %～ 2 9 9% )。同样 ,除了柳叶沙棘以外 ,种子油脂中不饱和脂肪酸含量 (5 1 7%～ 86 5 % )要高于饱和脂肪酸含量(12 5 %～ 2 7 2 % )。在果肉油脂中 ,主要的饱和脂肪酸是棕榈油酸 (37 1%～ 4 6 4 % )、亚油酸 (6 4 %～15 0 % )、油酸 (4 0 %～ 6 9% )和软脂酸 (9 1%～ 2 8 1% )。柳叶沙棘果肉油脂中含有丰富的亚油酸(15 0 % )和α 亚麻酸 (1 3% )。棕榈油酸是最主要的不饱和脂肪酸 (37 1%～ 4 6 4 % ) ,在拉浩种群中含量最高 (4 6 4 % )。软脂酸是主要的饱和脂肪酸 ,除了斯皮特种群 (9 1% ) ,其他类型中的含量基本相同(2 6 4 %～ 2 8 1% )。在种子油脂中 ,斯皮特种群中含量最丰富的是亚油酸 (39 8% )和α

关键词：中亚沙棘柳叶沙棘 HI-1(外来沙棘) 果肉和种子脂肪酸组成