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Geospatial and Statistical Analysis of Land Surface Temperature and Land Surface Characteristics of Jaipur and Ahmedabad Cities of India

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Journal of Geoscience and Environment Protection 2024年第8期12卷 1-19页

作者： rupesh Kumar Gupta Department of Continuing Education and Extension Faculty of Social Science University of Delhi Delhi India

Land surface temperature (LST) is a phenomenon that significantly affects the environment, the cities’ liveability, and the citizens’ well-being. This Study aims to perform a comparative study of the microclimate and Surface Urban Heat Island (SUHI) phenomenon of two metropolitan cities of India, i.e. Jaipur and Ahmedabad, using MODIS Satellite data, whereas Landsat Data was used to analyse the Land Surface Characteristics by an index-based approach. The Study’s findings reveal that Ahmedabad has 35.53 per cent of the total area classified as having a low potential, and 13.55 per cent is designated as a high potential LST zone. Meanwhile, in Jaipur, 30.45 per cent of the city’s total area is identified as a low potential LST zone and 12.69 per cent as a high potential LST zone. This Study highlights the importance of mitigating the UHI phenomenon in urban centres for the overall well-being of city dwellers. It will help policymakers and stakeholders comprehend plans and take initiatives to minimise the effects of the UHI phenomenon on rapidly growing cities. .

关键词： LST UHI Index-Based Approach Built-Up Remote Sensing GIS

Polyaxial strength criterion and closed-form solution for squeezing rock conditions

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第3期12卷 507-515页

作者： rupesh Kumar Verma Sarvesh Chandra Department of Civil Engineering Indian Institute of Technology KanpurKanpur208016India

In this paper,a nonlinear strength criterion is proposed using the average of intermediate(σ2)and minor(σ3)principal stresses in place of σ3 in Ramamurthy(1994)’s strength *** proposed criterion has the main advantages of negligible variation of strength parameters with confining stress and ability to link with conventional strength ***,a new closed-form solution based on the proposed criterion is derived and validated for Chhibro Khodri ***,analytical solutions including Singh’s elastoplastic theory,Scussel’s approach,and closed-form solutions based on conventional and modified Ramamurthy(2007)criteria are compared with the results of proposed *** is shown that the in situ squeezing pressure predictions made by the proposed approach are more ***,a parametric study of the present analytical solution is carried out,which displays explicit dependency of tunnel stability on internal support pressure and tunnel *** influence of tunnel geometry is observed to be dependent on the applied support pressure.

关键词： Intermediate principal stress Squeezing pressure Closed-form solution Polyaxial strength criterion

Energy and exergy analysis of syngas production from different biomasses through air-steam gasification

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Frontiers in Energy 2020年第3期14卷 607-619页

作者： S.rupesh C.Muraleedharan P.Arun Department of Mechanical Engineering National Institute of Technology CalicutCalicut 673601India

Gasification is a thermo-chemical reaction which converts biomass into fuel gases in a *** efficiency of conversion depends on the effective working of the *** first step in the conversion process is the selection of a suitable feedstock capable of generating more gaseous *** paper analyses the performance of different biomasses during gasification through energy and exergy analysis.A quasi-equilibrium model is developed to simulate and compare the feasibility of different biomass materials as gasifier ***-metric studies are conducted to analyze the effect of temperature,steam to biomass ratio and equivalence ratio on energy and exergy *** the biomasses considered,sawdust has the highest energy and exergy efficiencies and lowest *** a gasification temperature of 1000 K,the steam to biomass ratio of unity and the equivalence ratio of 0.25,the energy efficiency,exergy efficiency and irreversibility of sawdust are 35.62%,36.98%and 10.62 MJ/kg,*** is also inferred that the biomass with lower ash content and higher carbon content contributes to maximum energy and exergy efficiencies.

关键词： gasification modeling energy exergy syngas

CFD modeling of pressure drop and drag coefficient in fixed beds:Wall effects

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Particuology 2010年第1期8卷 37-43页

作者： rupesh K.Reddy Jyeshtharaj B.Joshi Department of Chemical Engineering Institute of Chemical TechnologyMatungaMumabiIndia

Simulations of fixed beds having column to particle diameter ratio （D/dp） of 3, 5 and 10 were performed in the creeping, transition and turbulent flow regimes, where Reynolds number （dpVLρL/μL） was varied from 0.1 to 10,000. The deviations from Ergun＇s equation due to the wall effects, which are important in D/dp 〈 15 beds were well explained by the CFD simulations. Thus, an increase in the pressure drop was observed due to the wall friction in the creeping flow, whereas, in turbulent regime a decrease in the pressure drop was observed due to the channeling near the wall. It was observed that, with an increase in the D/dp ratio, the effect of wall on drag coefficient decreases and drag coefficient nearly approaches to Ergun＇s equation. The predicted drag coefficient values were in agreement with the experimental results reported in the literature, in creeping flow regime, whereas in turbulent flow the difference was within 10-15%.

关键词： Computational fluid dynamics Fixed bed Wall effects Pressure drop Drag coefficient

GPS-based noise mapping of Ahmedabad city

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Transportation Safety and Environment 2023年第4期5卷 145-154页

作者： Akshay Vinaychandra Vora rupesh P.Vasani Gujar at Technological University Ahmedabad 382424GujaratIndia

Noise mapping is an effective tool to measure *** noise mappingone can represent noise *** mapping was carried out for Ahmedabad *** was collected at 633 different locations across the ***,longitude and real-time noise levels were noted at each *** software was used for creating noise maps and colour noise *** percentage of the city covered by the respective value of contour of noise was also found using the software,as well as the number of people in the city suffering from the respective levels of *** all the results,a multi-linear regression model was developed to predict noise,using SPSS statistics *** developed model was analysed using an R^(2)test as well as a paired t-test.

关键词： noise mapping transportation-induced noise population density ArcGIS software SPSS statistics software R2 test paired t-test

A modified Murashige and Skoog media for efficient multipleshoot induction in G. arborea Roxb.

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Journal of Forestry Research 2014年第3期25卷 557-564页

作者： Shilpa S. Madke Konglanth J. Cherian rupesh S. Badere Department of Botany Hislop College Department of Botany RTM Nagpur University M. J. Phuley Educational Campus

This paper reports on the effect of various micropropagation factors of Gmelina arborea Roxb. through multiple shoot induction. Factors like the source and age of explants, plant growth regulators （PGRs）, media composition, and carbon source affected multiple shoot-ing in the present study. Among all the explants used, only shoot tips derived from one, two, and three week old seedlings could form multiple shoots. Besides, the formation of multiple shoots depended on the con-centration and combination of PGRs. Among all the PGRs, BAP （6-benzylaminopurine） alone gave the highest regeneration efficiency. Simi-larly, IBA （Indole-3-butyric acid） was the most efficient PGR in inducing root formation in the microshoots. Media composition and carbon source also affected the regeneration efficiency. MS （Murashige and Skoog medium） proved to be the best media for regeneration followed by B5, SH （Schenk and Hilderbrandt medium） and WPM （Woody plant medium） in that order. Similarly, among sugars, only sucrose and glucose sup-ported induction of microshoots. Based on this study we recommend the use of glucose in place of sucrose in MS medium for maximum regenera-tion efficiency.

关键词： agroforestry micropropagation plant nutrition shoot tipexplant timber plant Verbenaceae

Efficient parallelization of SPH algorithm on modern multi-core CPUs and massively parallel GPUs

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第6期12卷 102-128页

作者： Pravin Jagtap rupesh Nasre VSSanapala B.S.V.Patnaik Department of Applied Mechanics Indian Institute of Technology Madras Chennai 600036 India Department of Computer Science&Engineering Indian Institute of Technology Madras Chennai 600036 India Indira Gandhi Centre for Atomic Research Homi Bhabha National Institute Kalpakkam 603102 India

Smoothed Particle Hydrodynamics (SPH) is fast emerging as a practically usefulcomputational simulation tool for a wide variety of engineering problems. SPH isalso gaining popularity as the back bone for fast and realistic animations in graphicsand video games. The Lagrangian and mesh-free nature of the method facilitates fastand accurate simulation of material deformation, interface capture, etc. Typically,particle-based methods would necessitate particle search and locate algorithms tobe implemented efficiently, as continuous creation of neighbor particle lists is acomputationally expensive step. Hence, it is advantageous to implement SPH, on modernmulti-core platforms with the help of High-Performance Computing (HPC) tools. Inthis work, the computational performance of an SPH algorithm is assessed on multicore Central Processing Unit (CPU) as well as massively parallel General PurposeGraphical Processing Units (GP-GPU). Parallelizing SPH faces several challenges suchas, scalability of the neighbor search process, force calculations, minimizing threaddivergence, achieving coalesced memory access patterns, balancing workload, ensuringoptimum use of computational resources, etc. While addressing some of these challenges,detailed analysis of performance metrics such as speedup, global load efficiency, globalstore efficiency, warp execution efficiency, occupancy, etc. is evaluated. The OpenMP andCompute Unified Device Architecture (CUDA) parallel programming models have beenused for parallel computing on Intel Xeon(R) E5-2630 multi-core CPU and NVIDIAQuadro M4000 and NVIDIA Tesla p100 massively parallel GPU architectures. Standardbenchmark problems from the Computational Fluid Dynamics (CFD) literature are chosen for the validation. The key concern of how to identify a suitable architecturefor mesh-less methods which essentially require heavy workload of neighbor search andevaluation of local force fields from neighbor interactions is addressed.

关键词： SPH GPU CUDA OpenMP HPC CFD particle based methods

Secure optical communication using a quantum alarm

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Light(Science & Applications) 2020年第1期9卷 380-389页

作者： Yupeng Gong rupesh Kumar Adrian Wonfor Shengjun Ren Richard V.Penty Ian H.White Centre for Advanced Photonics and Electronics University of Cambridge9 JJ Thomson AveCambridge CB30FAUK Quantum Communications Hub Information CentreDepartment of PhysicsUniversity of YorkYork YO105DDUK University of Bath Claverton DownBath BA27AYUK

Optical fibre networks are advancing rapidly to meet growing traffic *** issues,including attack management,have become increasingly important for optical communication networks because of the vulnerabilities associated with tapping light from optical fibre *** layer security often requires restricting access to channels and periodic inspections of link *** this paper,we report how quantum communication techniques can be utilized to detect a physical layer *** present an efficient method for monitoring the physical layer security of a high-data-rate classical optical communication network using a modulated continuous-variable quantum *** describe the theoretical and experimental underpinnings of this monitoring system and the monitoring accuracy for different monitored *** analyse its performance for both unamplified and amplified optical *** technique represents a novel approach for applying quantum signal processing to practical optical communication networks and compares well with classical monitoring *** conclude by discussing the challenges facing its practical application,its differences with respect to existing quantum key distribution methods,and its usage in future secure optical transport network planning.

关键词： communication quantum networks

Recovery of free volume in PIM-1 membranes through alcohol vapor treatment

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Frontiers of Chemical Science and Engineering 2021年第4期15卷 872-881页

作者： Faiz Almansour Monica Alberto rupesh S.Bhavsar Xiaolei Fan Peter M.Budd Patricia Gorgojo Department of Chemical Engineering and Analytical Science School of EngineeringThe University of ManchesterManchester M139PLUK Department of Chemistry School of Natural SciencesThe University of ManchesterManchester M139PLUK

Physical aging is currently a major obstacle for the commercialization of PIM-1 membranes for gas separation applications.A well-known approach to reversing physical aging effects of PIM-1 membranes at laboratory scale is soaking them in lower alcohols,such as methanol and ***,this procedure does not seem applicable at industrial level,and other strategies must be *** this work,a regeneration method with alcohol vapors(ethanol or methanol)was developed to recover permeability of aged PIM-1 membranes,in comparison with the conventional soaking-in-liquid *** gas permeability and separation performance,before and post the regeneration methods,were assessed using a binary mixture of CO_(2) and CH_(4)(1:1,v:v).Our results show that an 8-hour methanol vapor treatment was sufficient to recover the original gas permeability,reaching a CO_(2) permeability>7000 barrer.

关键词： polymer of intrinsic microporosity(PIM) PIM-1 physical aging gas separation vapor-phase regeneration