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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

Variation and dispersal of PM_(10) and PM_(2.5) during COVID-19 lockdown over Kolkata metropolitan city,India investigated through HYSPLIT model

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Geoscience Frontiers 2022年第1期13卷 285-296页

作者： Biswajit Bera Sumana Bhattacharjee Nairita Sengupta soumik Saha Department of Geography Sidho-Kanho-Birsha UniversityRanchi RoadP.O.Purulia Sainik School723104India Department of Geography Jogesh Chandra Chaudhuri College(University of Calcutta)30Prince Anwar Shah RoadKolkata 700033India Department of Geography Diamond Harbour Women’s UniversitySarisha 743368India M.A. Independent ScholarDepartment of GeographyUniversity of Calcutta35Ballygunge Circular RoadKolkata 700019India

The higher concentration of PM_(10) and PM_(2.5) in the lower atmosphere is severely harmful for human health and it also makes visibility diminution along with weather and climate *** main objective is to find out the spatiotemporal variation and dispersal of PM_(10) and PM_(2.5) along with COVID-19 infection in the dusty city *** consecutive two years PM_(10) and PM_(2.5) data of different stations have been obtained from State Pollution Control Board,*** West *** trajectory analysis has been done through HYSPLIT(Hybrid Single Particle Lagrangian Integrated Trajectory)model to find the path and direction of air *** result showed that the various meteorological or environmental factors(such as temperature,relative humidity,wind,wind speed,pressure and gusty wind)and geographical location regulate the spatiotemporal variation of PM_(10) and PM_(2.5).These factors like high temperature with relative humidity and strong wind influence to disperse the particulate matters from north to south direction from city to outside during summer in Kolkata metropolitan *** summer(both pre and lockdown years),the height of particles is extended up to 1000 m owing to active atmospheric ventilation whereas in winter it is confined within 100 *** HYSPLIT model clearly specified that the particles dispersed from south,south-west to north and north east direction due to strong *** constant magnification of PM_(10) and PM_(2.5) in the lower atmosphere leads to greater frequency of COVID-19 infections and *** Kolkata,the one of the crucial reasons of high infection and deaths(COVID-19)is co-morbidity of people.

关键词： COVID-19 Lockdown Variation Dispersal HYSPLIT model

Confidential machine learning on untrusted platforms:a survey

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Cybersecurity 2021年第1期4卷 461-479页

作者： Sharma sagar Chen Keke Northwestern Mutual Data Science Associate Professor Director of Trustworthy and Intelligent Computing Lab Department of Computer Science Marquette University Milwaukee WisconsinUSA HP Inc. USA

With the ever-growing data and the need for developing powerful machine learning models,data owners increasingly depend on various untrusted platforms(e.g.,public clouds,edges,and machine learning service providers)for scalable processing or collaborative ***,sensitive data and models are in danger of unauthorized access,misuse,and privacy compromises.A relatively new body of research confidentially trains machine learning models on protected data to address these *** this survey,we summarize notable studies in this emerging area of *** a unified framework,we highlight the critical challenges and innovations in outsourcing machine learning *** focus on the cryptographic approaches for confidential machine learning(CML),primarily on model training,while also covering other directions such as perturbation-based approaches and CML in the hardware-assisted computing *** discussion will take a holistic way to consider a rich context of the related threat models,security assumptions,design principles,and associated trade-offs amongst data utility,cost,and confidentiality.

关键词： Confidential computing Cryptographic protocols Machine learning

The biological clock: future of neurological disorders therapy

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Neural Regeneration Research 2018年第3期13卷 567-568页

作者： sagar Gaikwad Institute of Life Sciences NALCO Square

Dear editors, The seminal, discoveries by Jeffrey Connor Hall, Michael Rosbash and Michael Warren Young have earned the Nobel Prize in Physiology and Medicine 2017 for revealing a crucial physiological mechanism explaining biological clock, with important implications for human health and diseases. The work explains the interplay between the biological clock, the transcriptional feedback loop, and neuroscience, where they identified genes and proteins that work together both in humans and other animals. This article describes the link between biological clock disruption and consequent neurodegeneration and also highlights the significance of biological clock modulators for possible clinical interventions in neurological disorders.

关键词： The biological clock future of neurological disorders therapy

Evolution of Neoproterozoic siliciclastic Kerur Formation in the light of sequence stratigraphic framework: Badami Basin, Karnataka, India

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Journal of Palaeogeography 2024年第4期13卷 706-737页

作者： soumik Mukhopadhyay Nipun Ghosh Pradip Samanta Arunava Sen Soumyadeep Bose Department of Geological Sciences Jadavpur UniversityKolkata 700032India Atomic Minerals Directorate for Exploration and Research Shillong 793019India Department of Geology University of North BengalDarjeelingSiliguri 734013India

Field-based sedimentology,state of the art facies analysis and sequence stratigraphic framework analysis have revealed the controls of local and global tectonics,basin-marginal slope,climate and changes in relative sea level (RSL) over the sedimentation pattern and evolution of a Neoproterozoic Kerur Formation within the Badami Group of Kaladgi Supergroup in *** entire succession shows three major cycles of *** study and fluvial architectural elemental analysis suggest considerable variations in depositional environments as well as palaeogeography.A transition from basin-margin alluvial cone deposits to braided system,initially with fluctuating ephemeral flows then to a steadier semi-perennial nature,is discernible within the 1^(st) cycle,in response to decreasing depositional slope with rising water *** initial alluvial cone and braided ephemeral streams of high slope areas is designated as a product of low accommodation systems tract (LAST),while the semi-perennial system with steadier flows,representing the axial river of the initial rift valley,appears to be a product of high-accommodation systems tract (HAST).The 2^(nd) cycle begins with a perennial and steady braided river system and grades upward to a shallow marine succession,comprising wave-dominated,well-sorted sandstone,with a granular transgressive lag at the ***,the bottommost fluvial interval of the 2^(nd) cycle constitutes the lowstand systems tract (LST).The marine succession represents deposits of outer shelf offshore to foreshore-beach settings and is composed of an initially deepening and fining upward transgressive systems tract (TST),followed by a coarsening and shallowing upward highstand systems tract (HST) with a maximum marine flooding surface (MFS) in between,demarcated by a shale-rich condensed *** 3^(rd) cycle,with its prograding alluvial fan and aggrading braided fluvial deposits and restricted occurrence,represents only the low accommodation systems

关键词： Neoproterozoic Kerur Formation Facies and architectural elemental analysis Palaeogeography Sequence stratigraphy Basin evolution

Developmental dependence for functional eye regrowth in Xenopus laevis

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Neural Regeneration Research 2018年第10期13卷 1735-1737页

作者： Cindy X.kha Kelly Ai-Sun Tseng School of Life Sciences University of Nevada

Introduction：A key challenge in designing tissue repair strategies is knowing whether and how developmental mechanisms are used for successful repair of mature/adult *** it is known that developmental components are used in repair,it remains mostly unclear which ones are required and whether they act similarly as during *** issue is further complicated by the fact that it is difficult.

关键词： Developmental dependence for functional eye regrowth in Xenopus laevis Figure RI

Dynamics of a delay-induced prey-predator system with interaction between immature prey and predators

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International Journal of Biomathematics 2024年第2期17卷 139-176页

作者： soumik Pandey Abhijit Sarkar Debashis Das Sarbani Chakraborty Department of Mathematics West Bengal State University Barasat-7000126West BengalIndia Department of Basic Science&Humanities JIS College of Engineering Kalyani-741235West BengalIndia

In biological pest control systems,several pests(including insects,mites,weeds,etc.)are controlled by biocontrol agents that rely primarily on *** this biocontrol management ecology,we have created a three-tier prey-predator model with prey phase structure and predator gestation *** studies have demonstrated that predators with Holling type-II functional responses sometimes consume immature prey.A study of the well-posedness and local bifurcation(such as saddle-node and transcritical)near the trivial and planer equilibrium points is carried *** any time lag,the prey development coeficient has a stabilizing impact,while increasing attack rate accelerates *** transformation rate and handling time are shown to cause multiple stability switches in the *** results demonstrate time delay is the key destabilizer that destroys *** model can replicate more realistic events by including time-dependent factors and exploring the dynamic behavior of nonautonomous *** the presence of time delay,sufficient conditions of permanence and global attractivity of the nonautonomous system are ***,MATLAB simulations are performed to validate the analytical findings.

关键词： Holling type-II functional response stage-structure bifurcation time delay seasonality

Gait Recognition by Cross Wavelet Transform and Graph Model

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IEEE/CAA Journal of Automatica Sinica 2018年第3期5卷 718-726页

作者： sagar Arun More Pramod Jagan Deore Department of Electronics and Telecommunication Engineering R.C.Patel Institute of Technology

In this paper, a multi-view gait based human recognition system using the fusion of two kinds of features is *** use cross wavelet transform to extract dynamic feature and bipartite graph model to extract static feature which are coefficients of quadrature mirror filter(QMF)-graph wavelet filter bank. Feature fusion is done after normalization. For normalization of features, min-max rule is used and mean-variance method is used to find weights for normalized features. Euclidean distance between each feature vector and center of the cluster which is obtained by k-means clustering is used as similarity measure in Bayesian framework. Experiments performed on widely used CASIA B gait database show that, the fusion of these two feature sets preserve discriminant information. We report 99.90 % average recognition rate.

关键词： Binary sequences feature extraction identification of persons linear discriminant analysis(LDA)

miR-106b as an emerging therapeutic target in cancer

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Genes & Diseases 2022年第4期9卷 889-899页

作者： Surendra Kumar sagar Department of Zoology Swami Shraddhanand CollegeUniversity of DelhiDelhi 110036India

MicroRNAs (miRNAs) comprise short non-coding RNAs that function in regulating the expression of tumor suppressors or oncogenes and modulate oncogenic signaling pathways in cancer. miRNAs expression alters significantly in several tumor tissues and cancer cell lines. For example, miR-106b functions as an oncogene and increases in multiple cancers. The miR-106b directly targets genes involved in tumorigenesis, proliferation, invasion, migration, and metastases. This review has focused on the miR-106b function and its downstream target in different cancers and provide perspective into how miR-106 regulates cancer cell proliferation, migration, invasion, and metastases by regulating the tumor suppressor genes. Since miRNAs-based therapies are currently being developed to enhance cancer therapy outcomes, miR-106b could be an attractive and prospective candidate in different cancer types for detection, diagnosis, and prognosis assessment in the tumor.

关键词： Apoptosis Cancer Metastases miRNA Oncogene Tumor suppressor

Lakshanhatti stromatolite, India： Biogenic or abiogenic？

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Journal of Palaeogeography 2016年第3期5卷 292-310页

作者： Adrita Choudhuri Subir Sarkar Wladyslaw Altermann soumik Mukhopadhyay Pradip K.Bose Department of Geological Sciences Jadavpur University Kolkata 700032 India Department of Geology University of Pretoria Pretoria 0002 South Africa

Abstract The extraordinary lateral continuity of isopachous stromatotite laminae in the -87 m-thick Mesoproterozoic Lakshanhatti Dolomite （India） evinces chemical precipitation. Fan-shaped crystals grown on tamina surfaces further corroborate this contention; growth of fan-shaped crystats under the overhanging stromatolite column-margin indicates direct carbonate precipitation from ambient waters. The fan-shaped crystats are stacked up, separated onty by thin dark micritic taminae. In a retativety upper stratigraphic in- terval of the formation, tighter laminae characterized by a dotted texture and traversed by numerous winding tubutar voids change graduatty upwards into dark micritic taminae. Some sporadicatty distributed lenticutar intraciastic beds also have the similarly dark micritic coatings. Ctear carbonate cement crusts atso occur between laminae and between successive dark micritic coats around intraciasts. DuU cathodotuminescence （CL） characterizes this cement as weU as the cement lining within earty dia^enetic voids, in contrast, the taminae with dotted textures show dirty orange luminescence, white the dark micritic taminae and the dark micritic grain-coats display dear bright orange luminescence. Pyrite and its pseudomorphs are preferabty concentrated along the dark micritic laminae. Carbon content in these dark micritic components, whether laminae or coats, is much higher than in the lighter components, exceeding what can be accounted for their CaMg（COs）2 composition. A large part of this carbon is kerogen, ptausibly biogenic. The dark components are, therefore, reasonably, though not unequivocally, assumed to be microbial mats. Degradation of the mats might have given rise to the tight laminae with dotted textures. The fuzzy-margin tubes within the tight laminae probabty manifest the escape of gases generated during organic matter decomposition. Si-At-rich terrigenous fines thinty draping the dark carbonaceous taminae was possibty the resutt of baft

关键词： StromatoHte Lamina continuity Mesoproterozoic Lakshanhatti Dolomite Member Inorganicprecipitation Kerogen enrichment Filamentous microbiota