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A novel formulation of material nonlinear analysis in structural mechanics

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Defence Technology（防务技术） 2021年第1期17卷 36-49页

作者： Himanshu gaur Anupam Srivastav Institute of Structural Mechanics Bauhause Universitat WeimarMarienstrasse 15D-99423WeimarGermany Department of Civil Engineering Middle East CollegeMuscatOman

This article demonstrates a novel approach for material nonlinear *** analysis procedure eliminates tedious and lengthy step by step incremental and then iterative procedure adopted classically and gives direct results in the linear as well as in nonlinear range of the material *** of elastic moduli is ***,stress and strain functions are used as the material input in the analysis *** stress and strain functions are directly derived from the stress-strain behavior of the material by the method of curve *** way,the whole stress-strain diagram is utilized in the analysis which naturally exposes the response of structure when loading is in nonlinear range of the material *** is found that it is an excellent computational procedure adopted so far for material nonlinear analysis which gives very accurate results,easy to adopt and simple in *** method eliminates all types of linearity assumptions in basic derivations of equations and hence,eliminates all types of possibility of errors in the analysis procedure as *** it is required to know stress distribution in the structural body by proper modelling and structural idealization,the proposed analysis approach can be regarded as stress-based analysis *** problems such as uniaxial problem,beam bending,and torsion problems are *** is found that approach is very suitable for solving the problems of fracture *** release rate for plate with center crack and double cantilever beam specimen is also *** approach solves the fracture problem with relative ease in strength of material style *** all problems,results are compared with the classical displacement-based liner theory.

关键词： Computational methods Material nonlinear analysis Fracture mechanics Energy release rate etc

Hydrogen Spillover Effect in Electrocatalysis:Delving into the Mysteries of the Atomic Migration

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Energy & Environmental Materials 2024年第5期7卷 181-205页

作者： Ashish gaur Jatin Sharma HyukSu Han Department of Energy Science Sungkyunkwan UniversitySuwon 16419Korea Institute of Nano Science and Technology Sector-81Knowledge CitySahibzada Ajit Singh Nagar 140306PunjabIndia Department of Energy Sungkyunkwan UniversitySuwon 16419South Korea

Hydrogen spillover effect has recently garnered a lot of attention in the field of electrocatalytic hydrogen evolution reactions.A new avenue for understanding the dynamic behavior of atomic migration in which hydrogen atoms moving on a catalyst surface was opened up by the setup of the word"hydrogen spillover."However,there is currently a dearth of thorough knowledge regarding the hydrogen spillover ***,the advancement of sophisticated characterization procedures offers progressively useful information to enhance our grasp of the hydrogen spillover *** understanding of material fabrication for hydrogen spillover effect has *** these factors,we made an effort to review most of the articles published on the hydrogen spillover effect and carefully analyzed the aspect of material *** of our attention has been directed toward the molecular pathway that leads to improve hydrogen evolution reactions *** addition,we have attempted to elucidate the spillover paths through the utilization of DFT ***,we provide some preliminary research suggestions and highlight the opportunities and obstacles that are still to be confronted in this study area.

关键词： electrocatalysis hydrogen evolution reaction hydrogen spillover effect interfacial atomic migration metal-support interaction

Structural, Optical, and Ferroelectric Behaviors of Cu_(1-x)Li_xO(0≤x≤0.09) Nanostructures

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Acta Metallurgica Sinica(English Letters) 2014年第2期27卷 306-312页

作者： Prakash Chand Anurag gaur Ashavani Kumar Department of Physics National Institute of Technology Kurukshetra

We report structural, optical, and ferroelectric behaviors of lithium-doped copper oxide （CU1-xLixO with x = 0.0, 0.05, 0.07, and 0.09） nanostructures synthesized by hydrothermal method. The XRD pattern indicates the pure phase formation of CuO without any impurity, and the crystallite size is found to be increases for x = 0-0.07 and decreases for x = 0.09. FESEM analysis shows that the average size of Cul xLixO nanostructures increases with the increasing the Li-doping concentrations up to 7% and then decreases for 9% Li doping concentration. Moreover, Raman and photoluminescence spectrum also confirm the phase formation of CuO. A significant reduction in optical band gap is observed up to x = 0.07, and then band gap increases for x ~ 0.09 due to segregation of the impurities on the surface or grain boundaries, which may suppress the grain growth and results the enhancement in optical band gap. Moreover, a weak ferroelectricity is observed in CuO nanostructures for pure and 9% Li doping through polarization versus electric field （P- E）.

关键词： CuO nanostructure Optical properties PL and Raman spectroscopy

A Survey of Fodder Plants in Mid-altitude Himalayan Rangelands of Uttarakhand,India

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Journal of Mountain Science 2008年第3期5卷 265-278页

作者： Vir Singh RD gaur Babita Bohra Professor Department of Environmental ScienceCollege of Basic Sciences and HumanitiesGB Pant University of Agriculture and TechnologyPantnagar-263145UttarakhandIndia Emeritus Professor Department of BotanyHNB Garhwal UniversitySrinagar-246174UttarakhandIndia Regional Rangeland Consultant International Centre for Integrated Mountain Development (ICIMOD)P.O. Box 3226KhumaltarKathmanduNepal

Himalayan rangelands, the crucial but by and large the neglected ecosystems, are an integral part of mountain farming systems. The present investigation is based on the extensive survey and collection of mid-altitude range plants from Almora and Champawat districts of Kumaun division in the Uttarakhand Himalaya in India, from September 2003 to June 2007. The rangelands studied were oak types, chirpine types, grass types and mixed ones. Some 300 species of grasses, other herbaceous plants, trees and shrubs were found in the mid-altitude rangelands. A sizeable number of species belonged to the family of Poaceae. The grass-dominated rangelands especially harboured a variety of grass species of good fodder value. The diversity of fodder plants is a proportion of the enormous biodiversity occurring in the parts of the Himalaya. A panorama of the biodiversity emerged in this study, which is of both intangible value and direct value for the livestock- and rangeland- dependent mountain communities, suggests a very high scope of the utilization of this natural and uncultivated biodiversity for supporting livestock- based livelihoods of the region. This biodiversity also has enormous bearing on the cultivated area of the region.

关键词： Rangelands mid-altitude fodder plants biodiversity Himalaya Uttarakhand

Multiple Forgery Detection in Video Using Convolution Neural Network

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Computers, Materials & Continua 2022年第10期73卷 1347-1364页

作者： Vinay Kumar Vineet Kansal Manish gaur Centre for Advanced Studies Dr.A P J Abdul Kalam Technical UniversityLucknowIndia Institute of Engineering and Technology Dr.A P J Abdul Kalam Technical UniversityLucknowIndia

With the growth of digital media data manipulation in today’s era due to the availability of readily handy tampering software,the authenticity of records is at high risk,especially in *** is a dire need to detect such problem and do the necessary *** this work,we propose an approach to detect the interframe video forgery utilizing the deep features obtained from the parallel deep neural network model and thorough analytical *** proposed approach only uses the deep features extracted from the CNN model and then applies the conventional mathematical approach to these features to find the forgery in the *** work calculates the correlation coefficient from the deep features of the adjacent frames rather than calculating directly from the *** divide the procedure of forgery detection into two phases–video forgery detection and video forgery *** video forgery detection,this approach detect input video is original or *** the video is not original,then the video is checked in the next phase,which is video forgery *** the video forgery classification,method review the forged video for insertion forgery,deletion forgery,and also again check for *** proposed work is generalized and it is tested on two different *** experimental results of our proposed model show that our approach can detect the forgery with the accuracy of 91%on VIFFD dataset,90%in TDTV dataset and classify the type of forgery–insertion and deletion with the accuracy of 82%on VIFFD dataset,86%on TDTV *** work can helps in the analysis of original and tempered video in various domain.

关键词： Digital forensic forgery detection video authentication video interframe forgery video processing deep learning

Enveloping Relief Surfaces of Landslide Terrain

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Journal of Mountain Science 2007年第3期4卷 203-208页

作者： A.K.Pachauri Abhirup Chatterjee Reeta gaur Department of Earth Sciences Indian Institute of Technology

Two relief surfaces that envelop the rock fall region in a part of Garhwal Himalayas around Chamoli have been identified. Relative relief and absolute relief have been analyzed and the enveloping surfaces recorded at two levels of relief in the landscape. All landslide activity lies within these surfaces. The lower enveloping surface （800 m） dips due south by 7-8 degrees, due to an elevation rise of lOO meters within 12 km from south to north, i.e., a gradient of 8 percent. The nature of the surface is smooth. The upper enveloping surface （〉 2500 m） is almost parallel to the lower one but its surface is undulatory due to landslides and denudation. The area has been a seismically active region and has undergone seismic activity up until recently, as evidenced by the Chamoli earthquake of 29th March 1999. The effects of earthquakes are seen at higher levels in the form of landslide imprints on the terrain.

关键词： Relief landslide terrain Himalayas

Importance of etiologies of secondary diabetes:How often do we think off in clinical practice?

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World Journal of Clinical Cases 2025年第5期13卷 49-51页

作者： Kotha Sugunakar Reddy Arvind Kumar Morya Archana gaur Sakthivadivel Varatharajan Department of General Medicine All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Ophthalmology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Physiology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia

The article"Secondary diabetes due to different etiologies:Four case reports"by Song et al,published in the World Journal of Clinical Cases,delves into the identi-fication of rare causes of secondary diabetes and emphasizes the necessity for healthcare professionals to recognize these *** to do so can result in treatment delays and compromised patient *** article discusses spe-cific types of diabetes,including maturity onset of diabetes in young,pancreas-related diseases,endocrinopathies,drug-induced diabetes,infections,and con-genital genetic syndromes associated with diabetes *** summaries highlight how patients with secondary diabetes,stemming from conditions such as Williams-Beuren syndrome and pituitary adenoma,often exhibit distinct characteristics overlooked in clinical *** authors stress the importance of a holistic diagnostic approach and advocate for proactive management through early intervention,including genetic tests and antibody *** awa-reness and education are crucial for timely identification and proper management,ultimately improving patient *** findings prompt a call to action for healthcare professionals to consider rare causes of secondary diabetes,facili-tating better glycemic control and overall patient care.

关键词： Diabetes mellitus Etiologies Viral infections Syndromes Pathophysiology,Secondary diabetes mellitus,Clinical practice

Abusive adversarial agents and attack strategies in cyber-physical systems

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CAAI Transactions on Intelligence Technology 2023年第1期8卷 149-165页

作者： Viraj Singh gaur Vishal Sharma John McAllister School of Electronics Electrical Engineering and Computer ScienceQueen's University BelfastBelfastUK

The exponential increase in IoT device usage has spawned numerous cyberspace *** devices,sensors,and actuators bridge the gap between physical processes and the cyber network in a cyber-physical system(CPS).Cyber-physical system is a complex system from a security perspective due to the heterogeneous nature of its components and the fact that IoT devices can serve as an entry point for *** adversaries design their attack strategies on systems to gain an advantage at a relatively lower cost,whereas abusive adversaries initiate an attack to inflict maximum damage without regard to cost or *** this paper,a sensor spoofing attack is modelled as a malicious adversary attempting to cause system failure by interfering with the feedback control *** is accomplished by feeding spoofed sensor values to the controller and issuing erroneous commands to the *** on a Simulink-simulated linear CPS support the proof of concept for the proposed abusive ideology,demonstrating three attack *** impact of the evaluations stresses the importance of testing the CPS security against adversaries with abusive settings for preventing ***,the research concludes by highlighting the limitations of the proposed work,followed by recommendations for the future.

关键词： intelligent systems security security evaluation

Magnetic and magnetotransport behavior of overdoped nanocrystalline Nd_(1-x)Sr_xMnO_3 (0.50≤x≤0.63)

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Journal of Rare Earths 2011年第7期29卷 654-659页

作者： Neelam Maikhuri Vasudha Agarwal Anurag gaur H.K.Singh Department of Physics National Institute of Technology Kurukshetra-136119 India National Physical Laboratory New Delhi-110012 India

The nanocrystalline samples of Nd1-xSrxMnO3 （NSMO）（x=0.5, 0.55, 0.60, 0.63） were synthesized by sol-gel based polymeric pre-cursor route. Structural, magnetic and magnetotransport properties were studied systematically. It was found that in the composition range （x=0.50-0.63）, Nd1-xSrxMnO3 showed paramagnetic to ferromagnetic （PM-FM） transition in the vicinity of TC～270 K but the FM phase was weakened as the Sr concentration increased. The appearance of weak ferromagnetism was explained in terms of the core-shell model. More-over, for x=0.63 sample, a second transition is observed below TC at T=185 K, which is possibly due to the appearance of A-AFM/ C-AFM or a mixture of both the phases. Resistivity vs temperature （ρ-T） curve showed that the resistivity of all the samples was much larger than the sin-gle crystals of corresponding compositions due to large contribution of the grain boundaries in the present nanocrystalline samples. In all samples, extrinsic kind of MR behavior dominated because of nanocrystalline nature of the samples, which was nearly of the same order （～10%） in all samples. However, the intrinsic kind of MR behavior was also significant in x=0.50 sample, because of the strongest FM feature in this sample.

关键词： manganites magnetoresistance spin polarized tunnelling rare earths