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Semi-flowable self-consolidating concrete using industrial wastes for construction of rigid pavements in India:An overview

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Journal of Traffic and Transportation Engineering(English Edition) 2023年第2期10卷 243-257页

作者： Bhupati Kannur Hemant sharad Chore Department of Civil Engineering Dr.B.R.Ambedkar National Institute of Technology JalandharPunjabIndia

The construction of rigid pavements using conventionally vibrated concrete consumes a significant amount of energy as it requires rigorous *** also requires a high number of laborers and creates noise during ***,a new kind of concrete called semi-flowable self-consolidating concrete(SFSCC)for pavement construction using slip-form paving technology is reviewed in this *** SFSCC requires no energy for compaction as it gets compacted under its self *** also renders shape stability in the fresh state which is critical to expedite the construction in slip form *** review focuses on the need,evolution,and requirement of the ingredient materials,mix design,and methods for testing the properties of ***,the utilization of industrial wastes in the construction industry and the production of self-consolidating concrete are *** literature on the effect of different materials on the properties of such concrete and field studies in this context are ***,its suitability as pavement construction material either in normal rural roads or in low-volume village roads is discussed in the Indian *** review reveals that relatively less amount of study on SFSCC in general and as a pavement material in particular is available in the literature and pursuant to this,creates a wide scope of research.

关键词： SFSCC SCC Industrial waste materials Concrete pavement Pavement construction

Strain-induced fast domain wall motion in hybrid piezoelectric-magnetostrictive structures with Rashba and nonlinear dissipative effects

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Acta Mechanica Sinica 2024年第9期40卷 83-97页

作者： Sumit Maity Sarabindu Dolui sharad Dwivedi Department of Mathematics School of SciencesNational Institute of Technology Andhra PradeshTadepalligudem 534101India

The prime objective of this work is to analyze the motion of magnetic domain walls(DWs)in a thin layer of magnetostrictive material that is perfectly attached to the upper surface of a thick piezoelectric *** our analysis,we consider a transversely isotropic hexagonal subclass of magnetostrictive materials that demonstrate structural inversion *** this aim,we utilize the one-dimensional extended Landau-Lifshitz-Gilbert equations,which describe the magnetization dynamics under the influence of various factors such as magnetic fields,spin-polarized electric currents,magnetoelastic effects,magnetocrystalline anisotropy,Rashba fields,and nonlinear dry-friction *** employing the standard traveling wave ansatz,we derive an analytical expression of the most relevant dynamic features:velocity,mobility,threshold,breakdown,and propagation direction of the DWs in both steady and precessional dynamic *** analytical investigation provides insights into how effectively the considered parameters can control the DW ***,numerical illustrations of the obtained analytical results show a qualitative agreement with the recent observations.

关键词： Domain wall Magnetoelastic field Extended Landau-Lifshitz-Gilbert equation Dry-friction dissipation Rashba effect

Highlights from the literature on risk assessment techniques adopted in the mining industry:A review of past contributions,recent developments and future scope

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International Journal of Mining Science and Technology 2016年第4期26卷 691-702页

作者： Verma Shikha Chaudhari sharad Department of Mechanical Engineering YCCE CollegeRTMNU Department of Mechanical Engineering YCCE College

In this paper a comprehensive review is presented of risk assessment techniques adopted in the mining industry worldwide;those techniques applied in other hazardous industries and potential techniques which are robust,mature and holistic and can be implemented for the Indian mining industry in future to enhance workplace safety are also *** from the review are indicative of the fact that socio-technical complexity of industrial systems has *** developments in the area of risk management highlight the need for implementation of the latest robust techniques of risk assessment in the mining *** consideration of the present scenario,the development of a model for risk analysis having an interface between hazard identification and risk assessment,along with an interface between risk assessment and accident causation to predict if an accident will occur under given conditions,has become dire *** will increase hazard awareness and enable mine management to select and prioritize problem areas and identify safety system weaknesses in both underground and surface *** will ultimately help decision makers,risk analysts and safety managers make a major contribution in the development of workplace safety with a near-to-zero accident rate.

关键词： Risk Risk assessment Mining HazardSafety

Hyperfine splitting and ferromagnetism in CdS:Mn nanoparticles for optoelectronic device applications

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Journal of Semiconductors 2023年第12期44卷 89-103页

作者： Madhavi sharad Darekar Praveen Beekanahalli Mokshanatha Department of Physics Institute of Engineering and TechnologySrinivas UniversityMukkaSurathkalMangalor-e574146KarnatakaIndia

Manganese(Mn)doped cadmium sulphide(Cd S)nanoparticles were synthesized using a chemical *** was possible to decrease Cd S:Mn particle size by increasing Mn *** techniques such as ultraviolet-visible(UV-Vis)absorption spectroscopy and photoluminescence(PL)spectroscopy were used to determine optical properties of Cd S:Mn *** quantization effect was observed in UV-Vis absorption *** efficiency for luminescence or the internal magnetic field strength was increased by doping Cd S nanoparticles with Mn *** emission was observed at wavelength~630 nm due to ^(4)T_1→^(6)A_1 *** Mn~(2+)ions arranged in tetrahedral coordination are mainly responsible for *** quenching and the effect of Mn doping on hyperfine interactions in the case of Cd S nanoparticles were also *** corresponding weight percentage of Mn element actually incorporated in doping process was determined by atomic absorption spectroscopy(AAS).Crystallinity was checked and the average size of nanoparticles was estimated using the X-ray diffraction(XRD)*** S:Mn nanoparticles show ferromagnetism at room *** electron microscopy(TEM)images show spherical clusters of various sizes and selected area electron diffraction(SAED)patterns show the polycrystalline nature of the *** electronic states of diluted magnetic semiconductors(DMS)ofⅡ-Ⅵgroup Cd S nanoparticles give them great potential for applications due to quantum *** this study,experimental results and discussions on these aspects have been given.

关键词： synthesis characterization undoped CdS nanoparticles Mn-doped CdS nanoparticles non-aqueous chemical method

Field investigation of carbon dioxide(CO_(2))fluxes and organic carbon from a conserved paddy field of North-East India

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International Soil and Water Conservation Research 2017年第4期5卷 325-334页

作者： Jayashree Dutta sharad Gokhale Department of Civil Engineering Indian Institute of Technology GuwahatiGuwahati-781039India

This study investigates the effects of conserved tills on the fluxes of carbon dioxide(CO_(2))and soil organic carbon(SOC)from a rain-fed-paddy plot in Assam(North-eastern state of India).Two paddy plots identical in soil properties,developed to cultivate rice(Sali,grown in low-lying areas of Assam),were adjacent to each other to follow a conventional agricultural practice in one and conservation in the *** chambers(1 m×0.6 m×0.4 m)were placed in both the plots to collect runoff for analyzing CO_(2) *** results of the both practices have been *** conservation plot,the SOC was high in the range from 3.17+0.01 kg m^(−2) to 20.42+0.56 kg m^(−2) and the CO_(2) emission was less,i.e.97.30+7.11 mg m^(−2) h^(-1) as compared to 189.65+4.37 mg m^(−2) h^(-1) of the conventional *** tillage practiced for the conservation plot facilitated higher porosity(50.11+8.40%to 88.87+3.59%)and greater water retention(47.47+1.15%to 101.37+1.63%)in the *** results indicate that more tillage exposed the soil to atmospheric oxygen more,which leads to excess mineralization of organic carbon and emissions of CO_(2) as in the conventional plot.

关键词： Paddy SOC CO_(2) Emission Tillage

Using machine learning to predict habitat suitability of sloth bears at multiple spatial scales

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Ecological Processes 2021年第1期10卷 634-645页

作者： Tahir Ali Rather sharad Kumar Jamal Ahmad Khan Department of Wildlife Sciences Aligarh Muslim UniversityAligarhUttar Pradesh 202002India The Corbett Foundation 81-88Atlanta BuildingNariman PointMumbaiMaharashtra 400021India

Background:Habitat resources occur across the range of spatial scales in the *** environmental resources are characterized by upper and lower limits,which define organisms’distribution in their *** respond to these resources at the optimal spatial ***,multi-scale assessments are critical to identifying the correct spatial scale at which habitat resources are most influential in determining the specieshabitat *** study used a machine learning algorithm random forest(RF),to evaluate the scaledependent habitat selection of sloth bears(Melursus ursinus)in and around Bandhavgarh Tiger Reserve,Madhya Pradesh,***:We used 155 spatially rarified occurrences out of 248 occurrence records of sloth bears obtained from camera trap captures(n=36)and scats located(n=212)in the *** calculated focal statistics for 13 habitat variables across ten spatial scales surrounding each presence-absence record of sloth ***(>5000 m)and small(1000–2000 m)spatial scales were the most dominant scales at which sloth bears perceived the habitat *** the habitat covariates,farmlands and degraded forests were the essential patches associated with sloth bear occurrences,followed by sal and dry deciduous *** final habitat suitability model was highly accurate and had a very low out-of-bag(OOB)error *** high accuracy rate was also obtained using alternate validation ***:Human-dominated landscapes are characterized by expanding human populations,changing landuse patterns,and increasing habitat *** and degraded habitats constitute~40%of the landform in the buffer zone of the *** of the management implications may be identifying the highly suitable bear habitats in human-modified landscapes and integrating them with the existing conservation landscapes.

关键词： Bandhavgarh Melursus ursinus Multi-scale Habitat selection Random forest Sloth bear Species distribution models

Multi-scale habitat selection and impacts of climate change on the distribution of four sympatric meso-carnivores using random forest algorithm

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Ecological Processes 2020年第1期9卷 709-725页

Background:The habitat resources are structured across different spatial scales in the environment,and thus animals perceive and select habitat resources at different spatial *** to adopt the scale-dependent framework in species habitat relationships may lead to biased ***-scale species distribution models(SDMs)can thus improve the predictive ability as compared to single-scale *** study outlines the importance of multi-scale modeling in assessing the species habitat relationships and may provide a methodological framework using a robust algorithm to model and predict habitat suitability maps(HSMs)for similar multi-species and multi-scale ***:We used a supervised machine learning algorithm,random forest(RF),to assess the habitat relationships of Asiatic wildcat(Felis lybica ornata),jungle cat(Felis chaus),Indian fox(Vulpes bengalensis),and golden-jackal(Canis aureus)at ten spatial scales(500-5000 m)in human-dominated *** calculated out-of-bag(OOB)error rates of each predictor variable across ten scales to select the most influential spatial scale *** scale optimization(OOB rates)indicated that model performance was associated with variables at multiple spatial *** species occurrence tended to be related strongest to predictor variables at broader scales(5000 m).Multivariate RF models indicated landscape composition to be strong predictors of the Asiatic wildcat,jungle cat,and Indian fox *** the same time,topographic and climatic variables were the most important predictors determining the golden jackal *** models predicted range expansion in all four species under future climatic ***:Our results highlight the importance of using multiscale distribution models when predicting the distribution and species habitat *** wide adaptability of meso-carnivores allows them to persist in human-dominated regions and may even thrive in disturbed habi

关键词： Multiple-scale Multi-species Sympatric carnivores Species distribution modeling Bandhavgarh Climate change

Epigenetics of hepatocellular carcinoma:Role of microRNA

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World Journal of Gastroenterology 2013年第33期19卷 5439-5445页

作者： sharad Khare Qiong Zhang Jamal A Ibdah Division of Gastroenterology and Hepatology Department of Internal MedicineUniversity of Missouri Harry S Truman Memorial Veterans’ Hospital

Hepatocellular carcinoma(HCC)represents a major form of primary liver cancer in ***(miRs),small non-coding single-stranded RNAs of 19-24nucleotides in length,negatively regulate the expression of many target genes at the post-transcriptional and/or translational levels and play a critical role in the initiation and progression of *** this review we have summarized the information of aberrantly expressed miRs in HCC,their mechanism of action and relationship to *** recent advances in HCC research reveal that miRs regulate expression of various oncogenes and tumor suppressor genes,thereby contributing to the modulation of diverse biological processes including proliferation,apoptosis,epithelial to mesenchymal transition and *** a clinical viewpoint,polymorphisms within miR-binding sites are associated with the risk of *** in miR related genes have been shown to correlate with survival or treatment outcome in ***,the review focuses on the potential role of miRs as novel biomarkers and their translational applications for diagnosis and therapy in *** further insights into miR deregulation in HCC,it is expected that novel miR-based therapeutics will ***,we orient the readers to other reviews that may provide better understanding of miR research in HCC.

关键词： MicroRNA Cancer Hepatocellular carcinoma Biomarker Polymorphism

Efficient Synthesis of 3-Methyl-flavanones and Evaluation of Their Anti-bacterial Activity

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Chinese Journal of Chemistry 2012年第8期30卷 1695-1698页

作者： Nawghare Beena Funde sharad Raheem Abdul Lokhande Pradeep The Centre for Advanced Studies Department of Chemistry University of Pune Pune 411 007 India

A series of 2-phenyl-2,3-dihydrochromon-4-one derivatives （flavanone derivatives） were synthesized by silica gel assisted isomerization of several a-methyl-2＇-hydroxy chalcones in 74%--88% yield. These flavanones were further oxidized to 3-methyl flavones by using iodine in dimethyl sulphoxide at 60℃ in presence of acid. The newly synthesized derivatives were evaluated for in vitro study against Staphylococcus aureus, Micrococcus luteus and Staphylococcus epidermis.

关键词： cyclization oxidation chalcones silica gel 3-methyl-flavanones