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Evaluation of Hydrogeology of the Lower Son Valley Based on Remote Sensing Data

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Journal of Geographic Information System 2010年第4期2卷 219-226页

作者： manas banerjee Debolin Bhattacharya Hriday Narain Singh Daya Shanker 不详

Remote sensing, one of the most important reconnaissance and feature identifying tools generally applied for surface and groundwater investigation, was used for water resources mapping for the lower Son Valley in this study. The mapping was done with the help of Indian Remote Sensing (IRS) satellite imagery IRS-LISS- 1-B1 for January 29, 1991 obtained during the day transit time. The area under study comprises adjoining parts of Uttar Pradesh and Bihar states of India and extends over the seven districts, namely Bhojpur, Rohtas, Patna, Jahanabad, Aurangabad, Ballia and Chapra. Geology of the study area is quite complex, tectonically disturbed and shows four major cycles of depositions after erosions during last one billion years (since Cretaceous). Two lineaments mapped by GSI (Geological Survey of India) in western side of river Son in the Bhojpur district can also be identified by the satellite imagery. In the present study, apart from these lineaments, two new lineaments have been investigated, which run almost parallel to river Ganga in northwest parts of the area in Ballia district. The lineaments may play a very vital role in groundwater monitoring in the area. The detailed study of geomorphology, vegetation and geology of the Lower Son valley on the basis of photo-interpretation techniques for surface features, drainage pattern and density, and drainage texture has been carried out to determine alluvial type, permeability, tributary, etc. These studies and Darcy velocity analysis show that the prospect of water is very good for entire lower Son valley. The Bhojpur district is most prospective for groundwater exploitation.

关键词： Lower Son Valley Groundwater Monitoring Satellite Imageries Vindhyan Super Group of Kaimur Series Lineaments Drainage Analysis

Ground Rupturing Due to Entrapped Air/Gas in the Unconfined Zone

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International Journal of Geosciences 2010年第3期1卷 149-154页

作者： manas banerjee Vimla Prasad Singh Hridaya Narain Singh Daya Shankar Sun jay Uma Shanker Singh Department of Geophysics Banaras Hindu University Department of Earthquake Engineering University of Roorkee

The sudden and large oscillation of pressure of compressed air/gas entrapped in porous medium due to the changes in the actual pore-fluid pressure, during recharge of water following intense rainfall after a prolonged period of dryness such that the rainfall intensity exceeding infiltration capacity, leads to the generation of hydo-tremors. These hydro-tremors cause ground rupturing, subsidence, developments of cracks in the building, etc. A theoretical model has been presented to estimate the successive values of compressed air/gas pressures due to the successive development of actual pore-fluid pressures and effective stresses during recharge of water of the unconfined zone during the onset of the summer monsoon of 2008 in the northern parts of India.

关键词： Unconfined Zone Compressed Air/Gas Pore-Fluid Pressure Hydro-Tremor Ground Rupturing Effective Stress

Solvatochromism and Molecular Selectivity of C-(4-chlorophenyl)-N-phenylnitrone: A Photophysical Study

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CE-EEN-B0:Contour Extraction Based Extended EfficientNet-B0 for Brain Tumor Classification Using MRI Images

Optics and Photonics Journal 2012年第1期

作者： Sneha Salampuria Tandrima Chaudhuri manas banerjee

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Computers, Materials & Continua 2023年第3期74卷 5967-5982页

作者： Abishek Mahesh Deeptimaan banerjee Ahona Saha manas Ranjan Prusty A.Balasundaram School of Computer Science and Engineering Vellore Institute of TechnologyChennai600127India Centre for Cyber-Physical Systems Vellore Institute of TechnologyChennai600127India

A brain tumor is the uncharacteristic progression of tissues in the *** are very deadly,and if it is not diagnosed at an early stage,it might shorten the affected patient’s life ***,their classification and detection play a critical role in *** Brain tumor detection is done by biopsy which is quite *** is usually not preferred at an early stage of the *** detection involvesMagneticResonance Imaging(MRI),which is essential for evaluating the *** paper aims to identify and detect brain tumors based on their location in the *** order to achieve this,the paper proposes a model that uses an extended deep Convolutional Neural Network(CNN)named Contour Extraction based Extended EfficientNet-B0(CE-EEN-B0)which is a feed-forward neural network with the efficient net layers;three convolutional layers and max-pooling layers;and finally,the global average pooling *** site of tumors in the brain is one feature that determines its effect on the functioning of an ***,this CNN architecture classifies brain tumors into four categories:No tumor,Pituitary tumor,Meningioma tumor,andGlioma *** network provides an accuracy of 97.24%,a precision of 96.65%,and an F1 score of 96.86%which is better than already existing pre-trained networks and aims to help health professionals to cross-diagnose an MRI *** model will undoubtedly reduce the complications in detection and aid radiologists without taking invasive steps.

关键词： Brain tumor image preprocessing contour extraction disease classification transfer learning

Studies on seasonal fluctuation of different indices related to filarial vector,Culex quinquefasciatus around foothills of Susunia of West Bengal,India

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Asian Pacific Journal of Tropical Medicine 2010年第9期3卷 727-730页

作者： manas Paramanik Goutam Chandra Mosquito & Microbiology Research Units Parasitology LaboratoryDepartment of ZoologyThe University of BurdwanBurdwan-713104West BengalIndia

Objective:To collect information on the seasonal activity of filarial vector around foothills of Susunia of West Bengal,***:Indoor-resting mosquitoes were collected from the human habitations of 16 *** mosquitoes were identified and examined for different parameters following standard methods recommended by World Health Organization and pioneer ***:Overall man hour density,infection rate,infectivity rate,human blood index and daily mortality rate of the vector were assessed as 10.54%,6.31%,1.38%,77.33%and 13.00%, respectively,which were 12.17%,8.63%,2.26%,100.00%and 17.00%,respectively in the summer *** load of microfilaria,1st stage,2nd stage and 3rd stage larvae of Wuchereria bancrofti in infected vectors were 10.***.7.50,5.56 and 4.68,respectively,which were 11.58,9.90. 6.27 and 5.44,respectively in *** the searched shelters 63.37%,8.16%and 2.08% were found to be invaded by any vector,infected vector and infective vector,respectively,which were 68.75%,12.76%and 3.91%,respectively in ***:Different indices related to the vector were much higher in summer,which indicates that,summer is the most favorable season for transmission of lymphatic filariasis in the study *** data will help to formulate an effective vector control measure.

关键词： Seasonal fluctuation Vector indices Culex quinquefasciatus Filarial vector

Influence of second phase precipitates on mechanical and in-vitro corrosion behaviour of Mg-4Zn-0.5Ca-0.8Mn alloy in optimum homogenized conditions

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Journal of Magnesium and Alloys 2023年第4期11卷 1343-1366页

作者： Darothi Bairagi Partha Duley manas Paliwal Sumantra Mandal Department of Metallurgical and Materials Engineering Indian Institute of Technology Kharagpur721302India

The present study investigates the mechanical and in-vitro corrosion behavior of Mg-4Zn-0.5Ca-0.8Mn alloy in optimum homogenized *** optimization of the homogenization parameters has been carried out employing thermodynamic calculations and kinetic *** model utilizes the inter-diffusivity of the solute elements and predicts that∼6–24 h of homogenization at 633 K effectively redistributes the elements in the Mg *** on the insights obtained from the simulations,the as-cast Mg-4Zn-0.5Ca-0.8Mn alloy was subjected to homogenization heat treatment process for 6–*** microstructural study through optical microscopy and scanning electron microscopy(SEM)revealed that the interconnected network of second phase precipitates substantially dissolve within 24 h,implying adequate ***,fine Mg-Zn based precipitates with varied morphology and phase fractions also evolved during homogenization treatment,as confirmed through SEM and transmission electron *** the 12 h homogenized specimen,the highest fraction of uniformly dispersed fine precipitates resulted in the highest strength(∼225 MPa).On the other hand,a substantial disruption in coarse precipitate network and lower aspect ratio of fine Mg-Zn precipitates led to the highest ductility(∼8%)in this *** the 24 h homogenized specimen,the ductility reduced marginally owing to higher aspect ratio of fine *** immersion and electrochemical tests(viz.,potentiodynamic polarization and electrochemical impedance spectroscopy)carried out in Hank’s solution revealed that the 24 h homogenized specimen exhibits the best corrosion *** least fraction of Ca_(2)Mg_(6)Zn_(3)phase with maximum disruption in interconnectivity,in combination with a small fraction of fine equilibrium MgZn_(2)precipitates,resulted in suppression of localized corrosion in this *** promotes the formation of the most stable and compact product layer over the specimen,result

关键词： Mg alloy Thermodynamic-kinetic calculation Homogenization EIS Passive film

A REMARK ON LARGE TIME ASYMTOTICS FOR SOLUTIONS OF A NONHOMOGENEOUS VISCOUS BURGERS EQUATION

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Acta Mathematica Scientia 2023年第3期43卷 1323-1332页

作者： manas Ranjan SAHOO Satyanarayana ENGU Smriti TIWARI School of Mathematical Sciences National Institute of Science Education and ResearchAn OCC of Homi Bhabha National InstituteBhubaneswarKhurdaOdishaP.O.Jatni752050India Department of Mathematics National Institute of TechnologyWarangalTelangana506004India

The existence, uniqueness and regularity of solutions to the Cauchy problem posed for a nonhomogeneous viscous Burger's equation were shown in Chung, Kim and Slemrod [1] by assuming suitable conditions on initial data. Moreover, they derived the asymptotic behaviour of solutions of the Cauchy problem by imposing additional conditions on initial data. In this article, we obtain the same asymptotic behaviour of solutions to the Cauchy problem without imposing additional condition on initial data.

关键词： modified Bessel functions integral equation large time asymptotics convolution of functions

Surface Roughness Simulation During Rotational-Magnetorheological Finishing of Poppet Valve Profiles

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Nanomanufacturing and Metrology 2022年第3期5卷 259-273页

作者： Manjesh Kumar manas Das Nan Yu Department of Mechanical Engineering Indian Institute of TechnologyGuwahati 781039India School of Engineering The University of EdinburghEdinburgh EH89YLUK Department of Mechanical Engineering SRM University APAndhra Pradesh522502India

Surface finishing is essential for various applications in the aerospace *** of the applications is the poppet valve,which is used for leak-proof sealing of high-pressure gases in aerospace gas propulsion *** combustion engine also typically employs a poppet valve as an intake and exhaust ***-finishing a poppet valve is difficult because of its complex narrow *** precise nano-finished poppet valve perfectly fits on its seat and reduces hydrocarbon *** rotational-magnetorheological fluid-based finishing process can be used effectively for these complicated *** polishing agent in this process is magnetorheological fluid,and rheological properties are controlled by a permanent *** article presents the uniform finishing of the poppet valve's narrow ridge profile,which is analyzed through finite element analysis(FEA),wherein the outcomes are uniform shear stress,normal stress,and magnetic flux density distributions along the poppet ridge *** study of forces exerting on abrasive grains and surface roughness simulation is also conducted using FEA *** experiment is subsequently performed to verify the simulation results for poppet profile *** obtained experimental and simulated surface roughness values are *** the finishing process,the maximum percentage improvement of surface roughness is obtained as 93.71%.The rotational-magnetorheological fluid-based finishing process has high accuracy and reliability for specific applications.

关键词： Finite element analysis Nano-finishing Nickel-aluminum bronze alloy Poppet valve Magnetorheological fluid Surfaceroughness simulation

SOME EXACT SOLUTIONS OF 3-DIMENSIONAL ZERO-PRESSURE GAS DYNAMICS SYSTEM

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Acta Mathematica Scientia 2011年第6期31卷 2107-2121页

作者： K.T. Joseph manas R. Sahoo School of Mathematics Tata Institute of Fundamental Research

The 3-dimensional zero-pressure gas dynamics system appears in the modeling for the large scale structure formation in the universe. The aim of this paper is to construct spherically symmetric solutions to the system. The radial component of the velocity and density satisfy a simpler one dimensional problem. First we construct explicit solutions of this one dimensional case with initial and boundary conditions. Then we get special radial solutions with different behaviours at the origin.

关键词： zero-pressure gas dynamics spherically symmetric solutions