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Earthquake Engineering and Engineering Vibration 2024年第4期23卷 973-994页

作者： Barik, Jyoti Ranjan biswal, kishore chandra Department of Civil Engineering National Institute of Technology Rourkela India

The seismic behavior of a partially filled rigid rectangular liquid tank is investigated under short- and long-duration ground motions. A finite element model is developed to analyze the liquid domain by using four-noded quadrilateral elements. The competency of the model is verified with the available results. Parametric studies are conducted for the dynamic parameters of the base-isolated tank, using a lead rubber bearing to evaluate the optimum damping and time period of the isolator. The application of base isolation has reduced the total and impulsive hydrodynamic components of pressure by 80 to 90 percent, and base shear by 15 to 95 percent, depending upon the frequency content and duration of the considered earthquakes. The sloshing amplitude of the base-isolated tank is reduced by 18 to 94 percent for most of the short-duration earthquakes, while it is increased by 17 to 60 percent for the majority of the long-duration earthquakes. Furthermore, resonance studies are carried out through a long-duration harmonic excitation to obtain the dynamic behavior of non-isolated and isolated tanks, using a nonlinear sloshing model. The seismic responses of the base-isolated tank are obtained as higher when the excitation frequency matches the fundamental sloshing frequency rather than the isolator frequency.

关键词： lead rubber bearing frequency domain resonant inputs long-duration excitation

Seismic evaluation of frequency influence and resonant behavior for lead rubber bearing isolated rigid rectangular liquid tanks

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Earthquake Engineering and Engineering Vibration 2024年第04期 973-994页

作者： Jyoti Ranjan Barik kishore chandra biswal Department of Civil Engineering National Institute of Technology Rourkela

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A numerical study of violent sloshing problems with modified MPS method

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Journal of Hydrodynamics 2017年第4期29卷 659-667页

作者： Debadatta Jena kishore chandra biswal Department of Civil Engineering National Institute of Technology

A numerical study on violent liquid sloshing phenomenon in a partially filled rectangular container is carried out by using moving particle semi-implicit（MPS） method. The present study deals with the implementation of five modifications all together over the original MPS method. The modifications include improved source terms for pressure Poisson equation, special approximation technique for the representation of gradient differential operator, collective action of mixed free surface particle identification boundary conditions, effecting Neumann boundary condition on solving the PPE and fixing judiciously the parting distance among particles to prevent collision. The suitability of the kernel function used in the original MPS method along with these five modifications is investigated for violent sloshing problems. The present model ensures a good agreement between numerical results with the existing experimental observations. The model is successfully applied to a partially filled tank undergoing horizontal sinusoidal excitation to compute the sloshing wave amplitudes and pressure on tank walls. The assessment of dynamic behaviour manifested in terms of base shear, overturning moment and impact pressure load exerted on tank ceiling induced by violent sloshing motion using MPS method is not reported in the open literature and has been efficiently carried out in the present study.

关键词： Sloshing particle method impact pressure base shear overturning moment

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Nanofluids:Critical issues,economics and sustainability perspectives

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Particuology 2024年第4期87卷 147-172页

作者： Sayantan Mukherjee Sylwia Wcislik Purna chandra Mishra Paritosh Chaudhuri Instiute for Plasma Research Gandhinagar GujaratIndia Department of Building Physics and Renewable Energy Faculy of Environmental EngineeringGeodesy and Renewable EnergyKielce University of TechnologyAleja Tysiaclecia Panstwa Polskiego 7.25-314 KielcePoland Thermal Research Laboratory(TRL) School of Mechanical Engineering.KIT Deemed to be UniversityBhubaneswarOdishaIndia Homi Bhabha National Instirute(HBNI) AnushaktinagarMumbai 400094India

According to the Scopus database,every year several hundreds of new research papers are published in the field of *** area is attracting growing attention because of the significant improvement in the heat transfer and energy efficiency of the systems working with ***,as results from numerous scientific studies conducted by independent laboratories,there are several fundamental problems related to the unambiguous determination of their physical properties,their production,and economic *** most studies often focus on one issue or cover one kind of research or math-ematical correlation,this review paper provides insights into many problems during nanofluids research by proposing solving possibilities,which is the strength of our *** paper discusses the case of nanofluids quality,and morphology,thermal conductivity enhancement and the discrepancies in mathematical modelling,errors in dimensional and similarity analysis,nanofluid erosion,safety guide-lines,and toxicology ***,the sustainability and economics of nanofluids usage are also being discussed.

关键词： Nanofluids Thermal conductivity Stability Erosion Economics Sustainability

An Autopsy and Histopathology-based Study to Ascertain the Cause of Death of Brought Dead Cases

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Journal of Forensic Science and Medicine 2024年第1期10卷 28-33页

作者： Chandan Bandyopadhyay Prabir chandra Paul Prabhas chandra Chakraborty Department of Forensic and State Medicine Medical CollegeKolkataWest BengalIndia Department of Pathology Jagannath Gupta Institute of Medical Science and HospitalKolkataWest BengalIndia Department of Forensic Medicine and Toxicology NRS Medical College and HospitalKolkataand M.G.M Medical College and L S.K HospitalKishanganjBiharIndia

Background and Objectives:The cases of apparent natural deaths are encountered in the hospital casualties who are noted dead at the time of the first medical attention and as such are labeled as“Brought Dead.”These include the cases of sudden death,unexplained death,and unattended *** cause of such deaths is reported in the literature to emanate principally from the cardiovascular system,though there are some documented geographical,racial,and other *** the present study,we endeavored to detect the cause of such natural deaths in terms of the disease and the organ system involved,in the deceased individuals of the contemporary Bengali population,with cases due to obvious unnatural causes being *** and Methods:An observational,cross-sectional study with 105(n=105,male:89,female:16)study subjects of age group of 20-80 years,selected by systemic random sampling,from the brought dead subjects coming to the mortuary of the NRS Medical College and Hospital for medicolegal autopsy from April 2011 to March 2012,excluding cases having a history of the obvious unnatural *** system-wise gross examination was done,followed by tissue sampling for histopathological *** case-wise findings were tabulated and analyzed for descriptive statistics using SPSS ***:In the present study,89 cases were male(84.8%)and 16 cases were female(15.2%),which reflects a male:female ratio of 5.56:*** dead bodies are mostly recovered from the footpaths(47 cases,44%).Sixty-four(61%)cases are of known *** 54 cases out of 105(51.4%),morbid pathology is detected in the respiratory system(RS),lobar pneumonia,and cavitary pulmonary tuberculosis being the most frequent disease entity,in both ***-one years-sixty-five years is found to be the most commonly affected age group,in both *** and Conclusions:The present study shows that the most common organ system involved in brought dead cases is the RS,which is s

关键词： Autopsy brought dead cause of death histopathology

Climate-change habitat shifts for the vulnerable endemic oak species(Quercus arkansana Sarg.)

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Journal of Forestry Research 2024年第1期35卷 117-127页

作者： Suresh chandra Subedi Seth Drake Binaya Adhikari Mark V.Coggeshall Department of Biological Sciences Arkansas Tech UniversityRussellvilleARUSA Department of Biology University of KentuckyLexingtonKYUSA School of Natural Resources University of Missouri203 ABNR BuildingColumbiaMO 65211USA

Quercus arkansana(Arkansas oak)is at risk of becoming endangered,as the total known population size is represented by a few isolated *** potential impact of climate change on this species in the near future is high,yet knowledge of its predicted effects is *** study utilized the biomod2 R package to develop habi-tat suitability ensemble models based on bioclimatic and topographic environmental variables and the known loca-tions of current distribution of *** predicted suitable habitats across three climate change scenarios(SSP1-2.6,SSP2-4.5,and SSP5-8.5)for 2050,2070,and *** findings reveal that the current suitable habitat for *** is approximately 127,881 km^(2) across seven states(Texas,Arkansas,Alabama,Louisiana,Mississippi,Georgia,and Florida);approximately 9.5%is encompassed within state and federally managed protected *** models predict that all current suitable habitats will disap-pear by 2050 due to climate change,resulting in a northward shift into new regions such as Tennessee and *** large extent of suitable habitat outside protected areas sug-gests that a species-specific action plan incorporating pro-tected areas and other areas may be crucial for its ***,protection of *** habitat against climate change may require locally and regionally focused conservation policies,adaptive management strategies,and educational outreach among local people.

关键词： Biomod2 Climate change Conservation Habitat loss Habitat shift Species distribution modeling Oak species

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Fractional order prey-predator model incorporating immigration on prey:Complexity analysis and its control

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International Journal of Biomathematics 2024年第5期17卷 285-317页

作者： Md.Jasim Uddin chandra Nath Podder Departmentof Mathematics University of Dhaka Dhaka-1000Bangladesh

In this paper,the Caputo fractional derivative is assumed to be the prey-predator *** order to create Caputo fractional differential equations for the prey-predator model,a discretization process is first *** fixed points of the model are categorized *** identify requirements for the fixed points of the suggested prey-predator model's local asymptotic *** demonstrate analytically that,under specific parametric conditions,a fractional order prey-predator model supports both a Neimark-Sacker(NS)bifurcation and a Flip *** present evidence for NS and Flip bifurcations using central manifold and bifurcation *** parameter values and the initial conditions have been found to have a profound impact on the dynamical behavior of the fractional order prey-predator *** the bifurcation parameter is increased,the system displays chaotic *** simulations are shown to demonstrate chaotic behaviors like bifurcations,phase portraits,invariant closed cycles,and attractive chaotic sets in addition to validating analytical *** suggested prey-predator dynamical system's chaotic behavior will be controlled by the OGY and hybrid control methodology,which will also visualize the chaotic state for various biological parameters.

关键词： Prey-predator model Caputo fractional derivative Flip and Neimark-Sacker(NS)bifurcations immigration chaos control numerical simulation

Navigating the hydrogen prospect:A comprehensive review of sustainable source-based production technologies, transport solutions,advanced storage mechanisms, and CCUS integration

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Journal of Energy Chemistry 2024年第10期97卷 166-215页

作者： Sehar Tasleem chandra Sekhar Bongu Mohan Raj Krishnan Edreese Housni Alsharaeh College of Science and General Studies Alfaisal University

The review is a comprehensive discussion of current research advances,commercial scale developments,challenges,and techno-eco nomics for the entire H2value chain,including production,mainly focusing on sustainable sources,storage,and *** challenges,advantages,and uses of H2energy are included at ***,apart from the sustainable production approaches,the approaches and current developments for combating the carbon dioxide（CO2） emissions from existing H2production facilities are highlighted in terms of ca rbon capture,utilization,and storage（CCUS）.Concisely,the review discusses current material and recent technological adva ncements in developing pilot projects and large-scale establishments for viable and rapidly emerging sou rce-ba sed H2productio ***,the review also aims to provide an in-depthdiscussion and explore current developments based on the advantages of H2energy in terms of its utilization,based on its high energy density,and its ability to be used as a feedstock and *** the other hand,the challenges of H2are also elabo ***,the role of CCUS in a carbon-neutral economy and value chain for minimization of emissions from existing facilities is thoroughly deliberated,and the recent commercial-scale implementation of CCUS technologies is *** the utilization and recycling of captured CO2emissions along with H2to produce e-fuels in terms of current advances is detailed in this *** rthermore,the most applicable,efficient,a nd develo ping approaches are discussed for physical and chemical H2storage,considering recent la rge-scale implementations of liquid carriers and liquid organic hydrogen carriers as storage ***,the review elaborates on recent insights into advances in H2transport infrastructure,including compressed and liquid H2delivery via roads,ships,pipelines,and flight *** review gives precise insights into the recent scenario through an elaborated conclusion of each discussion t

关键词： Carbon capture E-fuels Hydrogen storage Hydrogen utilization Source-based hydrogen Transport infrastructure

Genes linked to obesity-related infertility:bridging the knowledge gap

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Reproductive and Developmental Medicine 2024年第2期8卷 121-129页

作者： Praveen Kumar chandra Sekar Ramakrishnan Veerabathiran Human Cytogenetics and Genomics Laboratory Faculty of Allied Health SciencesChettinad Academy of Research and EducationKelambakkamTamil Nadu 603103India

Genetic factors play a pivotal role in the complex relationship between obesity and *** article delves into the genetics of obesity-related infertility,focusing on the essential genes and mechanisms in both *** explored infertility factors in obese females,focusing on polycystic ovary syndrome(PCOS)and the influence of genes like insulin receptor(INSR),androgen receptor(AR),and follicle-stimulating hormone receptor(FSHR).Epigenetic changes are believed to contribute to PCOS-related *** impact of adipokines and inflammation on obesity-related infertility has been discussed,with genes such as fat mass and obesity(FTO)and melanocortin-4-receptor(MC4R)playing significant *** factors affecting sperm quality and function,including nuclear receptor subfamily 3 group C member 1(NR3C1)and methylenetetrahydrofolate reductase(MTHFR),have been investigated in obesity-related infertility in *** dysregulation influenced by genetic markers,such as leptin receptor(LEPR),tumor necrosis factor-alpha(TNF-α),and interleukin-6(IL-6),was also *** factors play a vital role in obesity-related infertility in both *** involved in metabolism,hormonal regulation,and inflammation contribute to the complex association between obesity and *** changes further complicate the *** these genetic mechanisms is essential to address obesity-related infertility and develop personalized interventions.

关键词： Obesity Infertility PCOS DNA methylation Epigenetics

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Effect of process parameter on the flowability of nanocrystalline CoNiCrAlY powder synthesized by mechanical milling

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Particuology 2024年第9期92卷 210-223页

作者： Annadaa Shankara Dash Indranil Manna Deepa Devapal Sharad chandra Sharma Jyotsna Dutta Majumdar School of Nanoscience and Technology IIT KharagpurWest BengalIndia BIT Mesra RanchiJharkhandIndia Department of Metallurgical and Materials Engineering IIT KharagpurWest BengalIndia Vikram Sarabhai Space Centre ThiruvanthapuramKeralaIndia

The present study concerns understanding the effect of process parameters on the characteristics and flowability of nanocrystalline CoNiCrAlY powder synthesized by mechanical *** milling has been conducted in a planetary ball mill with tungsten carbide(WC)ball,with ball to powder ratio of 10:1 at 300 rpm speed,using 1%stearic acid and toluene as process control agent(PCA)with time varying from 10 h to 36 *** synthesized nanocrystalline powder were characterized by Scanning Electron Microscopy,X-ray Diffraction technique,X-ray Photoelectron Spectroscopy,and Differential Scanning ***,flowability in terms of Hausner ratio was assessed by Tap Density *** particle size of the powder was found to decrease from 33μm to 22μm after 10 h of milling and further increases to 43μm and 38μm after 25 and 36 h of milling,respectively,in stearic acid ***,in toluene medium particle size continuously decreases from 33μm to 9.7μm with increasing milling *** particle morphology changes from spherical to platelet shape at low milling hours in both of the *** 25 h of milling,the shape of the particles is nearly spherical for stearic acid and irregular for toluene used as a *** size was found to decrease with increasing milling time from 147 nm to 7.7 nm and to 6.4 nm in stearic acid and toluene media,*** was presence ofγ,γʹ,β,hcp-Co,Al_(2)O_(3)and AlOOH phases on the powder particles milled in both the *** measured Hausner ratio of the powders was found to vary from 1.18 to 1.32 in stearic acid medium,and was found to increase with increasing milling *** the other hand,in toluene media flowability decreases(Hausner ratio increases from 1.33 to 1.44)with increasing milling time.

关键词： Mechanical milling Microstructure Process control agent(PCA) CoNiCrAIY Toluene Stearic acid Flowability