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Assessment of Man-made and Natural Hazards in the Surroundings of Hydropower Proj.cts under Construction in the Beas Valley of Northwestern Himalaya

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j.urnal of Mountain Science 2007年第3期4卷 221-236页

作者： Sanj.ev sharma j.gdish C. Kuniyal j. C. sharma G.B. Pant Institute of Himalayan Environment & Development Himachal UnitMohal-Kullu 175 126Himachal Pradesh India Department of Geography Himachal Pradesh University

Mountain ecosystem, on the earth, has plenty of natural resources. In Himachal Pradesh all the rivers are snowfed and therefore rich in water resources. These resources have been supporting enough for the generation of electricity through introducing hydropower proj.cts since the last decade However, every developmental activity has its own negative impacts on the surrounding environment. Due to the fragile nature of topography and delicacy of ecology of the Himalaya, it results in lot of disturbances because of high degree of human interferences like construction of maj.r hydropower proj.cts. The increased extent of geological hazards, such as landslides, rock fall and soil erosion, have mainly due to alike developmental interventions in the natural ecosystem. So understanding and analysing such impacts of the hydropower proj.cts have mainly been on the environment in various forms but natural hazards have been frequent ones. The present study, therefore, focuses mainly on the Parbati Stage II （800 MW） and the Parbati Stage III （520 MW） hydropower proj.cts; both of which fall within the Kullu district of Himachal Pradesh. Based on the perception survey of the local communities, the existing land use pattern, status of total acquired land of the residents by hydropower proj.cts, frequent natural hazards and resultant loss to the local communities due to upcoming construction of hydropower proj.cts surrounding to the Parbati Stage II and III have been analysed in the paper. Also, the preventive measures to mitigate these adverse impacts have been suggested to strengthen these proj.cts in eco-friendly manner in the mountain context.

关键词： Hydropower proj.ct under construction local community hazard preventive measure environment northwestern Indian Himalaya

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Surface Wave Characteristics at the Interface of Welded Elastic Halfspaces

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Open j.urnal of Acoustics 2011年第1期1卷 1-8页

作者： j. N. sharma K. K. sharma Ashwani Kumar 不详

The present article concentrates on the propagation of generalized surface acoustic waves in a composite struc- ture consisting of piezoelectric and non-piezoelectric semiconductor media. The mathematical model of the problem is depicted by a set of partial differential equations of motion, Gauss equation in piezoelectric and elec- tron diffusion equation in semiconductor along with boundary conditions to be satisfied at the interface. The secular equation that governs the propagation of surface waves has been derived in compact form after obtaining the formal solution. The analytic expressions for displacements, stresses, piezoelectric potential and electron concentration during the surface wave propagation at the interface have also been obtained. The numerical solu- tion of the secular equation is carried out for the cadmium selenide and silicon composite by employing fixed point functional iteration numerical method along with irreducible Cardano method. The computer simulated results with the help of MATLAB software in respect of dispersion curves, attenuation coefficient, displace- ments, stresses, carrier concentration and piezoelectric potential are presented graphically. This work may be useful in surface acoustic wave (SAW) devices and electronic industry.

关键词： Piezoelectrics Life Time Silicon Dispersive Waves Attenuation

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Spindle Cell Carcinoma of the Head and Neck: A Clinicopathological and Immunohistochemical Study of 40 Cases

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j.urnal of Cancer Therapy 2012年第6期3卷 1055-1059页

作者： Anupam Sarma Raj.yoti Das j. D. sharma A. C. Kataki Department of Gynecologic Oncology & Director Dr. B. Borooah Cancer Institute Guwahati India. Department of Head & Neck Oncology Dr. B. Borooah Cancer Institute Guwahati India Department of Pathology Dr. B. Borooah Cancer Institute Guwahati India

Spindle cell carcinoma of head and neck, a subtype of squamous cell carcinoma is a unique and rare neoplasm. It has a more aggressive behavior as compared to classical squomous cell carcinoma warranting surgical interventions with wider surgical margins. Immunohistochemistry along with routine histopathology is essential in establishing the diagnosis of spindle cell carcinoma. We at Dr. B. Borooah Cancer Institute, Guwahati, a regional institute for treatment and research, hereby report 40 cases of such lesion with clinicopathological and immunohistochemical study. Out of total 40 cases included in the study group most of the cases were in the age group of 40 to 60 years. Commonest site of presentation was nasopharynx and buccal mucosa. 14 cases of the oral cavity (buccal mucosa, alveolus, oral tongue and hard palate) were treated with surgery. All the cases with disease of the larynx and hypopharynx were treated with radiotherapy and cases involving the nasopharynx received radiotherapy and chemotherapy. In the surgery group recurrence rate was found to be 71.4% and metastasis rate was 21.4%. Biopsy specimens were subj.cted to histopathological examination followed by immunohistochemistry. Immunohistochemical analysis show concurrent presence of malignant epithelial and sarcomatoid spindle cell components by co-expression of cytokeratin (CK) and vimentin to various degrees.

关键词： Spindle Cell Carcinoma (SpCC) Squamous Cell Carcinoma (SCC) Immunohistochemistry (IHC)

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Spring学习指南

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作者： (印)j. 夏尔马(j. sharma)，(印)阿西施·萨林(Ashish Sarin)

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Spring学习指南

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作者： (印)j. 夏尔马(j. sharma) (印)阿西施·萨林(Ashish Sarin)

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用于制导弹药的自适应自动驾驶仪设计

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战术导弹控制技术 2002年第4期10卷 46-53页

作者： Anthony j. Calise Manu sharma j.Eric Corban Georgia Institute of Technology Atlanta Georgia 30332 Georgia Institute of Technology Atlanta Georgia 30332 Guided Systems Technologies Inc McDonough Georgia 30253

传统制导弹药自动驾驶仪的设计要求精确的气动模型,并依赖于变增益(gainschedule),以说明系统的非线性.本文给出了一种简化自动驾驶仪设计程序的方法:在单一飞行条件下设计逆控制器,将逆控制器与在线神经网络组合,以说明因近似逆引起的... 详细信息

传统制导弹药自动驾驶仪的设计要求精确的气动模型,并依赖于变增益(gainschedule),以说明系统的非线性.本文给出了一种简化自动驾驶仪设计程序的方法:在单一飞行条件下设计逆控制器,将逆控制器与在线神经网络组合,以说明因近似逆引起的误差,这样减少了大量设计程序及精确的气动数据.这些数据在大攻角或其它情况下很重要,因为这些领域中的空气动力特征变得高度非线性化.研究发现:逆的选择在其实现的过程中很重要,所以详细讨论.最后,给出该方法在非线性6自由度制导弹药中的模拟结果.

关键词：自适应自动驾驶仪制导弹药变增益

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Impact of Climate Change on Vegetation Distribution and Net Primary Productivity of Forests of Himalayan River Basins: Brahmaputra, Koshi and Indus

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American j.urnal of Climate Change 2018年第2期7卷 271-294页

作者： A. Chaitra S. Upgupta L. D. Bhatta j. Mathangi D. S. Anitha K. Sindhu Vidya Kumar N. K. Agrawal M. S. R. Murthy F. Qamar Indu K. Murthy j. sharma R. K. Chaturvedi G. Bala N. H. Ravindranath Centre for Sustainable Technologies Indian Institute of Science Bengaluru India International Centre for Integrated Mountain Development (ICIMOD) Kathmandu Nepal Divecha Centre for Climate Change Centre for Atmospheric Sciences Indian Institute of Science Bengaluru India

The impacts of climate change in terms of forest vegetation shifts and Net Primary Productivity (NPP) changes are assessed for Brahmaputra, Koshi and Indus river basins for the mid (2021-2050) and long (2071-2100) terms for RCP4.5 and RCP8.5 scenarios. Two Dynamical Global Vegetation Models (DGVMs), Integrated BIosphere Simulator (IBIS) and (Lund Postdam and j.na (LPj., have been used for this purpose. The DGVMs are driven by the ensemble mean climate proj.ctions from 5 climate models that contributed to the CMIP5 data base. While both DGVMs proj.ct vegetation shifts in the forest areas of the basins, there are large differences in vegetation shifts proj.cted by IBIS and LPj. This may be attributed to differing representation of land surface processes and to differences in the number of vegetation types (Plant Functional Types) defined and simulated in the two models. However, there is some agreement in NPP changes as proj.cted by both IBIS and LPj. with IBIS mostly proj.cting a larger increase in NPP for the future scenarios. Despite the uncertainties with respect to climate change proj.ctions at river basin level and the differing impact assessments from different DGVMs, it is necessary to assess the “vulnerability” of the forest ecosystems and forest dependent communities to current climate risks and future climate change and to develop and implement resilience or adaptation measures. Assessment of the “vulnerability” and designing of the adaptation strategies could be undertaken for all the forested grids where both IBIS and LPj.proj.ct vegetation shifts.

关键词： Climate Change Forests Himalayan River Basins Impacts NPP Change Forest Type Shift

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Instability of binary nanofluids with magnetic field

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Applied Mathematics and Mechanics(English Edition) 2015年第6期36卷 693-706页

作者： U.GUPTA j.sharma V.sharma Dr.S.S.Bhatnagar University Institute of Chemical Engineering and Technology Panjab University Energy Research Centre Panjab University Department of Mathematics Himachal Pradesh University

The present paper investigates the effects of a vertical magnetic field on the double diffusive nanofluid convection, The effects of the Brownian motion and ther- mophoresis due to the presence of nanoparticles and the effects of the Dufour and Sorer parameters due to the presence of solute are included in the investigated model. The normal mode technique is used to solve the conservation equations. For the analytical study, valid approximations are made in the complex expression for the Rayleigh number to get useful and interesting results. The bottom heavy binary nanofluids are more stable than the regular binary fluids, while the top heavy binary nanofluids are less stable than the regular binary fluids. The critical wave number and the critical Rayleigh number in- crease whereas the frequency of oscillation （for the bottom heavy configuration） decreases when the Chandrasekhar number increases. The numerical results for the alumina-water nanofiuid are studied by use of the MATHEMATICA software.

关键词： natural convection binary nanofluid Brownian motion thermophoresis,Chandrasekhar number

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Mathematical Modelling and Analysis of Lamb Waves in Elasto-Thermodiffusive Plates

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Advances in Applied Mathematics and Mechanics 2010年第2期2卷 238-258页

作者： j.N.sharma P.K.sharma Department of Applied Sciences National Institute of TechnologyHamirpur 177005India Department of Mathematics SL Bawa Dayanand Anglo Vedic CollegeBatala 143505India

The propagation characteristics of elasto-thermodiffusive Lamb waves in a homogenous isotropic,thermodiffusive,elastic plate have been investigated in the context of linear theory of generalized *** developing the formal solution of the mathematical model consisting of partial differential equations,the secular equations have been derived by using relevant boundary conditions prevailing at the surfaces of the plate for symmetric and asymmetric wave modes in completely separate *** secular equations for long wavelength and short wavelength waves have also been deduced and *** amplitudes of displacement components,temperature change and mass concentration under the Lamb wave propagation conditions have also been *** complex transcendental secular equations have been solved by using a hybrid numerical technique consisting of irreducible Cardano method along with function iteration technique after splitting these in a system of real transcendental *** numerically simulated results in respect of phase velocity,attenuation coefficient,specific loss factor and relative frequency shift of thermoelastic diffusive waves have been presented graphically in the case of brass material.

关键词： Diffusion Cardano method relative frequency thermal relaxation iteration method

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TransientWaves Due to Mechanical Loads in Elasto-Thermo-Diffusive Solids

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Advances in Applied Mathematics and Mechanics 2011年第1期3卷 87-108页

作者： j.N.sharma N.K.sharma K.K.sharma Department of Applied Sciences and Humanities National Institute of TechnologyHamirpur-177005India

This paper deals with the study of transient waves in a homogeneous isotropic,solid halfspace with a permeating substance in the context of the theory of generalized *** halfspace is assumed to be disturbed due to mechanical loads acting on its *** model comprising of basic governing differential equations and boundary conditions has been solved by employing Laplace transform *** that the second sound effects are short lived,the small time approximations of solution for various physical quantities have been obtained and the results are discussed on the possible wave *** case of continuous and periodic loads acting at the boundary,the displacement is found to be continuous at each wave front while it is discontinuous in case of impulsive *** temperature and concentration fields are found to be discontinuous at all the wave *** displacement,temperature change and concentration deviation due to impulsive,continuous and periodic mechanical loads have also been evaluated in the physical domain at all times by employing numerical inversion technique of integral *** computer simulated numerical results have been presented graphically in respect of displacement,temperature change and concentration deviation for brass.A significant effect of mass diffusion has been observed on the behaviour of mechanical and thermal waves.

关键词： Diffusion Laplace transform small time approximations wave fronts

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