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An SpH Framework for Earthquake-Induced Liquefaction Hazard Assessment of geotechnical Structures

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 251-277页

作者： Sourabh Mhaski g.V.Ramana Department of Civil Engineering Indian Institute of Technology DelhiNew Delhi110016India

Earthquake-induced soil liquefaction poses significant risks to the stability of geotechnical structures *** understanding of the liquefaction triggering,and the post-failure large deformation behaviour is essential for designing resilient *** present study develops a Smoothed particle Hydrodynamics(SpH)framework for earthquake-induced liquefaction hazard assessment of geotechnical *** coupled flowdeformation behaviour of soils subjected to cyclic loading is described using the pM4Sand model implemented in a three-phase,single-layer SpH framework.A staggered discretisation scheme based on the stress particle SpH approach is adopted to minimise numerical inaccuracies caused by zero-energy modes and tensile ***,non-reflecting boundary conditions for seismic analysis of semi-infinite soil domains using the SpH method are *** numerical framework is employed for the analysis of cyclic direct simple shear test,seismic analysis of a level ground site,and liquefaction-induced failure of the Lower San Fernando *** agreement for liquefaction triggering and post-failure behaviour demonstrates that the SpH framework can be utilised to assess the effect of seismic loading on field-scale geotechnical *** present study also serves as the basis for future advancements of the SpH method for applications related to earthquake geotechnical engineering.

关键词： Earthquake seismic liquefaction stress particle pM4Sand smoothed particle hydrodynamics(SpH)

Novel Contiguous Cross propagation Neural Network Built CAD for Lung Cancer

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Computer Systems Science & Engineering 2023年第2期44卷 1467-1484页

作者： A.Alice Blessie p.ramesh Department of Electronics&Communication Engineering Government College of EngineeringTirunelveli627007TamilnaduIndia Department of Electrical&Electronics Engineering University College of EngineeringRamanathapuram623513TamilnaduIndia

The present progress of visual-based detection of the diseased area of a malady plays an essential part in the medicalﬁ*** that case,the image proces-sing is performed to improve the image data,wherein it inhibits unintended dis-tortion of image features or it enhances further processing in various applications andﬁ*** helps to show better results especially for diagnosing *** late the early prediction of cancer is necessary to prevent disease-causing *** work is proposed to identify lung cancer using lung computed tomo-graphy(CT)scan *** helps to identify cancer cells’affected *** the present work,the original input image from Lung Image Database Consortium(LIDC)typically suffers from noise *** overcome this,the gaborﬁlter used for image processing is highly *** the next stage,the Spherical Iterative Reﬁnement Clustering(SIRC)algorithm identiﬁes cancer-suspected areas on the CT scan *** approach can help radiologists and medical experts recognize cancer diseases and syndromes so that serious progress can be avoided in the early *** new methods help to remove unwanted por-tions of the CT image and better utilization the *** subspace extraction of features approach is beneﬁcial for evaluating lung *** paper introduces a novel approach called Contiguous Cross propagation Neural Network that tends to locate regions afﬂicted by lung cancer using CT scan pictures(CCpNN).By using the feature values from the fourth step of the procedure,the proposed CCpNN tends to categorize the lesion in the lung nodular *** efﬁciency of the suggested CCpNN approach is evaluated using classiﬁcation metrics such as recall(%),precision(%),F-measure(percent),and accuracy(%).Finally,the incorrect classiﬁcation ratios are determined to compare the trained networks’effectiveness,through these parameters of CCpNN,it obtains the outstanding per-formance of 98.06%and it has provided the lowest false ratio of

关键词： Contiguous cross propagation neural network(CCpNN) gaborﬁlter

Heterogeneity of mature oligodendrocytes in the central nervous system

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Neural Regeneration Research 2025年第5期20卷 1336-1349页

作者： Chao Weng Adam M.R.groh Moein Yaqubi Qiao-Ling Cui Jo Anne Stratton g.R.Wayne Moore Jack p.Antel Neuroimmunology Unit Montreal Neurological Institute-HospitalDepartment of Neurology and NeurosurgeryMcGill UniversityMontrealQCCanada Department of Neurology Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina

Mature oligodendrocytes form myelin sheaths that are crucial for the insulation of axons and efficient signal transmission in the central nervous *** evidence has challenged the classical view of the functionally static mature oligodendrocyte and revealed a gamut of dynamic functions such as the ability to modulate neuronal circuitry and provide metabolic support to *** the recognition of potential heterogeneity in mature oligodendrocyte function,a comprehensive summary of mature oligodendrocyte diversity is *** delve into early 20th-century studies by Robertson and Río-Hortega that laid the foundation for the modern identification of regional and morphological heterogeneity in mature ***,recent morphologic and functional studies call into question the long-assumed homogeneity of mature oligodendrocyte function through the identification of distinct subtypes with varying myelination ***,modern molecular investigations,employing techniques such as single cell/nucleus RNA sequencing,consistently unveil at least six mature oligodendrocyte subpopulations in the human central nervous system that are highly transcriptomically diverse and vary with central nervous system *** and disease related mature oligodendrocyte variation denotes the impact of pathological conditions such as multiple sclerosis,Alzheimer's disease,and psychiatric ***,caution is warranted when subclassifying mature oligodendrocytes because of the simplification needed to make conclusions about cell identity from temporally confined *** studies leveraging advanced techniques like spatial transcriptomics and single-cell proteomics promise a more nuanced understanding of mature oligodendrocyte *** research avenues that precisely evaluate mature oligodendrocyte heterogeneity with care to understand the mitigating influence of species,sex,central nervous system region,age,and disease,

关键词： aging central nervous system diseases electron microscopy heterogeneity immunohistochemistry myelin sheath natural history neuroglia oligodendroglia single-cell gene expression analysis

Multi-scale habitat influences sprainting and group size of a freshwater-obligate smooth-coated otter(Lutrogale perspicillata) in Tungabhadra Otter Conservation Reserve, India

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Ecological processes 2024年第1期13卷 159-175页

作者： Ankit Moun p.ramesh Kumar M.Malathi priya T.ramesh Riddhika Kalle Sálim Ali Centre for Ornithology and Natural History Deputy Conservator of Forests Bellary Territorial Forest Division Deputy Conservator of Forests Working Plan and Survey and Research WingBellary Territorial Forest Division Centre for Functional Biodiversity University of Kwa Zulu-Natal

Background The impact of changing land-use patterns and associated anthropogenic threats on scale-dependent habitat use of semi-aquatic mustelids in scent-marking and social behaviour can provide important insights into the habitat ecology of smooth-coated otters(Lutrogale perspicillata).Methods We sampled 180 stream segments(100–400 m) as spatial replicates of 60 1-km2 sites to record indirect evidence(i.e. spraints and mass latrine sites) and group sizes of smooth-coated otters along the Tungabhadra Otter Conservation Reserve(TOCR) during the dry season. To quantify habitat, we recorded stream characteristics, riparian vegetation, and anthropogenic disturbances at the local scale, and hydro-environmental characteristics and land uses at the landscape scale. Using Markovian-chain detection and occupancy models, we assessed the multi-scale habitat use of otters in their selection of suitable areas for scent-marking based on repeated presence-absence data on spraint/latrine locations along the TOCR. We further used linear regression techniques to explore relationships between the number of individuals in smooth-coated otter group and hydro-environmental characteristics, spraint/latrine encounter rate, anthropogenic pressure, land cover, topography, and *** At the local scale, the probability of spraint deposition and group size decreased with anthropogenic disturbance while the probability of spraint detections decreased with grass cover. At the landscape scale, the probability of otter site use for spraint deposition and group sizes increased in southeast flowing streams. Spraint deposition increased with the proportion of sugarcane fields, whereas in contrast, group size decreased with proportion of sugarcane *** Our findings highlight the first empirical evidence on multi-scale habitat use of a southern Indian population of smooth-coated otters in an inland freshwater ecosystem surrounded by the scrub jungle–agriculture matrix. We sug

关键词： presence-absence modelling Inland river Freshwater ecosystem Semi-aquatic mammal Smooth-coated otter

Neutrophil to lymphocyte ratio and albumin bilirubin grade in hepatocellular carcinoma: A systematic review

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World Journal of gastroenterology 2020年第33期26卷 5022-5049页

作者： Ayman Bannaga ramesh p Arasaradnam Department of gastroenterology and Hepatology University Hospital Coventry and Warwickshire NHS TrustCoventry CV22DXWest MidlandsUnited Kingdom Warwick Medical School University of WarwickCoventry CV47HLWest MidlandsUnited Kingdom

BACKgROUND Hepatocellular carcinoma(HCC)is a frequent cause of cancer related death *** to lymphocyte ratio(NLR)and albumin bilirubin(ALBI)grade are emerging prognostic indicators in *** To study published literature of NLR and ALBI over the last five years,and to validate NLR and ALBI locally in our centre as indicators of HCC *** A systematic review of the published literature on pubMed of NLR and ALBI in HCC over the last five *** search followed the guidelines of the preferred reporting items for systematic reviews and ***,we also investigated HCC cases between December 2013 and December 2018 in our *** There were 54 studies describing the relation between HCC and NLR and 95 studies describing the relation between HCC and ALBI grade over the last five *** local cohort of patients showed NLR to have a significant negative relationship to survival(p=0.011).There was also significant inverse relationship between the size of the largest HCC nodule and survival(p=0.009).Median survival with alpha fetoprotein(AFp)p>10 KU/L was 5 *** found that AFp was inversely related to survival,this relationship was not statically significant(p=0.132).Mean survival for ALBI grade 1 was 37.7 mo,ALBI grade 2 was 13.4 months and ALBI grade 3 was *** grades performed better than Child Turcotte pugh score in detecting death from *** NLR and ALBI grade in HCC predict survival better than the conventional alpha *** grade performs better than Child Turcotte pugh *** markers are done as part of routine clinical care and in cases of normal alpha fetoprotein,these markers could give a better understanding of the patient disease *** and ALBI grade could have a role in modified easier to learn staging and prognostic systems for HCC.

关键词： Hepatocellular carcinoma Albumin bilirubin grade Neutrophil to lymphocyte ratio Alpha fetoprotein prognosis Survival

Analysis of Melting Heat Transport in a Cross Flow Direction:A Comparative Study

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Communications in Theoretical physics 2018年第12期69卷 777-784页

作者： g.K.ramesh S.A.Shehzad Department of Mathematics K.L.E'S J.T.College Department of Mathematics COMSATS Institute of Information Technology

An incompressible three-dimensional laminar flow in a cross flow direction is described in this work. The term of melting and viscous dissipation is incorporated in the mathematical modeling of present flow problem. The flow expressions are converted into dimensionless equations, which are solved with help of Runge-Kutta scheme. Impact of the emerging parameters on the non-dimensional velocities and temperature and friction-factors and local Nusselt number are examined. The convergence analysis is found for ε parative analysis is made between the obtained results and published data for limiting case. It is explored at the surface that the melting parameter retards the liquid temperature while it enhances the fluid velocity.

关键词： melting effect cross flow moving plate viscous heating numerical solution

Assessment of soil erosion by RUSLE model using remote sensing and gIS-A case study of Nethravathi Basin

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geoscience Frontiers 2016年第6期7卷 953-961页

作者： B.p.ganasri H.ramesh Department of Applied Mechanics & Hydraulics National Institute of Technology Karnataka

Soil erosion is a serious problem arising from agricultural intensification, land degradation and other anthropogenic activities. Assessment of soil erosion is useful in planning and conservation works in a watershed or basin. Modelling can provide a quantitative and consistent approach to estimate soil erosion and sediment yield under a wide range of conditions. In the present study, the soil loss model, Revised Universal Soil Loss Equation （RUSLE） integrated with gIS has been used to estimate soil loss in the Nethravathi Basin located in the southwestern part of India. The Nethravathi Basin is a tropical coastal humid area having a drainage area of 3128 km2 up to the gauging station. The parameters of RUSLE model were estimated using remote sensing data and the erosion probability zones were determined using gIS. The estimated rainfall erosivity, soil erodibility, topographic and crop management factors range from 2948.16 to 4711.4 MJ/***-1hr-1/year, 0.10 to 0.44 t ha-1 -*** 1, 0 to 92,774 and 0 to 0.63 respectively. The results indicate that the estimated total annual potential soil loss of about 473,339 t/yr is comparable with the measured sediment of 441,870 t/yr during the water year 2002 2003. The predicted soil erosion rate due to increase in agricultural area is about 14,673.5 t/yr. The probability zone map has been derived by the weighted overlay index method indicate that the major portion of the study area comes under low probability zone and only a small portion comes under high and very high probability zone. The results can certainly aid in implementation of soil management and conservation practices to reduce the soil erosion in the Nethravathi Basin.

关键词： Soil erosion RUSLE Remote sensing gIS Nethravathi Basin

Hybrid nanomaterial flow and heat transport in a stretchable convergent/divergent channel:a Darcy-Forchheimer model

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Applied Mathematics and Mechanics(English Edition) 2020年第5期41卷 699-710页

作者： g.K.ramesh S.A.SHEHZAD I.TLILI Department of Mathematics K.L.E Society’s J.T.CollegeGadag 582101KarnatakaIndia Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan Department for Management of Science and Technology Development Ton Duc Thang UniversityHo Chi Minh City 758307Vietnam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh City 758307Vietnam

The flow behavior in non-parallel walls is an important factor of any physical model including cavity flow and canals, which is applicable for diverging/converging channel. The present communication explains that the flow of the hybrid nanomaterial subjected to the convergent/divergent channel has non-parallel walls. It is assumed that the hybrid nanomaterial movement is in the porous region. A Darcy-Forchheimer medium of porosity is considered to interpret the porosity features. A useful similarity function is adopted to get the strong ordinary coupled equations. Numerical solutions are achieved through the Runge-Kutta-Fehlberg(RKF) fourth-fifth order method, and they are validated with the existing results. physical nature of the involving constraints is reported with the help of plots. It is explored that the velocity of divergent channel decreases, and convergent channel enhances for the higher solid volume faction. Further, the presence of inertia coefficient and porosity parameter amplifies the velocity at the wall.

关键词： hybrid nanoliquid channel Darcy-Forchheimer flow stretching wall numerical solution

Synthesis, characterization and biocompatibility studies of zinc oxide(ZnO) nanorods for biomedical application

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Nano-Micro Letters 2010年第1期2卷 31-36页

作者： R.gopikrishnan K.Zhang p.Ravichandran S.Baluchamy V.ramesh S.Biradar p.ramesh J.pradhan J.C.Hall A.K.pradhan g.T.ramesh Molecular Toxicology Laboratory Center for Biotechnology and Biomedical Sciences Norfolk State University Center for Materials Research Norfolk State University Health Science Academy Bayside High School Virginia Beach

Nanoparticles are increasingly being recognized for their potential utility in biological applications including ***,we have synthesized zinc oxide(ZnO)nanorods using zinc acetate and hexamethylenetetramine as precursors followed by characterizing using X-ray diffraction,fourier transform infrared spectroscopy,scanning electron microscopy and transmission electron *** growth of synthesized zinc oxide nanorods was found to be very close to its hexagonal nature,which is confirmed by X-ray *** nanorod was grown perpendicular to the long-axis and grew along the[001]direction,which is the nature of ZnO *** morphology of synthesized ZnO nanorods from the individual crystalline nucleus was confirmed by scanning and transmission electron *** length of the nanorod was estimated to be around 21 nm in diameter and 50 nm in *** toxicology studies showed that synthesized ZnO nanorods exposure on hela cells has no significant induction of oxidative stress or cell death even in higher concentration(10μg/ml).The results suggest that ZnO nanorods might be a safer nanomaterial for biological applications.

关键词： Zinc oxide [ZnO] Nanorods XRD SEM & TEM Cytotoxicity