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Effect of Cadmium on the Hatching ofMetaphire posthuma Cocoons

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Biomedical and Environmental sciences 1999年第1期12卷 50-53页

作者： s.k.gupta R·C·MURTHY 等 IndustrialToxicologyResearchCentre

Earthworms are considered ideal soil organisms for use in terrestrial ecotoxicology. Due to theirsusceptibility of heavy metals, the effect of cadmium on the hatching of M. posthuma cocoons wasstudied. The hatching was observed by the water incubation method and the doses of Cd were 0,1.25, 2.5, 5.0, 10.0 and 40.0ppm. The0 and 1.25 ppm treated cocoons hatched within 45-60 days at 20℃ with 80% hatching rate and one juvenile per cocoon; no hatching was observed athigher concentrations. Furihermore, there was a linear increase in Cd residue in the treated co-coons. These results are apparently ill effects of Cd on embryonic development of the earthworms

关键词： Animals Cadmium Oligochaeta soil Pollutants

Nanostructural Features and Optical Performance of RF Magnetron sputtered ZnO Thin Films

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Journal of Materials science & Technology 2010年第11期26卷 986-990页

作者： A.k.srivastava Praveen M.Arora s.k.gupta B.R.Chakraborty s.Chandra s.Toyoda H.Bahadur Natonal Physical Laboratory Council of Scientific and Industrial Research Indian Institute of Technology Okayama University of science

Zinc oxide （ZnO） thin films were grown on silicon substrate by RF （radio frequency） magnetron *** topography of these films exhibited a nanostructured granular appearance with the size of individual grains between 50 to 100 *** cross-sectional electron micrographs revealed columnar grains in the form of aggregated nanorods/wires with length of about 500 nm,similar to the thickness of these thin films of ZnO nucleated and grown vertically on the silicon *** resolution lattice scale imaging using high resolution transmission electron microscope （HRTEM） elucidated the single crystalline 1010 planes of hexagonal-ZnO constituting the columnar grains with the individual nanorod diameter between 3 and 4 *** photoluminescence measurements showed the prominent emission peak at around 460 nm for the blue band,normally attributed to intrinsic defects in particular interstitial zinc （Zn）.These films were further characterized by X-ray diffraction （XRD）,Fourier transform infrared spectroscopy （FTIR）,Raman spectroscopy and electron paramagnetic resonance （EPR） to evaluate various aspects on preferred growth orientations,band structures and vibrational modes originated in such fascinating nano-grained thin films of *** present investigations inferred that these films are advantageous in various potential applications for fabricating nano-scaled devices.

关键词： Electron microscopy Nanomaterials ZnO RF sputtering Photoluminescence spectroscopy Electron paramagnetic resonance

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蒸汽中制取的预氧化丙烯腈纤维的结构

国外纺织技术 1981年第3期 1-3页

作者： s.k.gupta 梁伯润

引言丙烯腈纤维的预氧化是在转变为碳纤维之前进行的一个氧化过程。在制造碳纤维过程中,这一步要很谨慎地进行,因为在这一阶段随着反应的进行,会释放出大量的热以及形成如HCN这类有毒的气体副产物。但氰基聚合的催化作用有可能抑制形成... 详细信息

引言丙烯腈纤维的预氧化是在转变为碳纤维之前进行的一个氧化过程。在制造碳纤维过程中,这一步要很谨慎地进行,因为在这一阶段随着反应的进行,会释放出大量的热以及形成如HCN这类有毒的气体副产物。但氰基聚合的催化作用有可能抑制形成HCN的反应。为此,使用了各种酸、碱催化剂。在

关键词：丙烯睛氧化丙烯初始模量氧化过程红外光谱 IR 光谱预氧化纤维制取

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大麦遗传雄性不育系的感温性

国外作物育种 2002年第5期21卷 25-26页

作者： s.k.gupta 向平等

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现代水文学和水资源的可持续发展

国外科技新书评介 2011年第10期 9-10页

作者： s.k.gupta 孙方敏不详中国科学院电子学研究所

本书综合运用数学、物理、化学、地质、气象、工程、土壤科学等多学科的相关知识广泛而深入地介绍了现代水文学和水资源的可持续发展。本书主要介绍了水的性质、水流流态和水质，同时，还描述了水在时间和空间上的分布及水资源的可持续... 详细信息

本书综合运用数学、物理、化学、地质、气象、工程、土壤科学等多学科的相关知识广泛而深入地介绍了现代水文学和水资源的可持续发展。本书主要介绍了水的性质、水流流态和水质，同时，还描述了水在时间和空间上的分布及水资源的可持续性。此外，本书还引用来自3个不同洲的4个案例，通过这些案例研究，将理论与实践相结合，便于读者理解。

关键词：可持续发展现代水文学水资源综合运用土壤科学水流流态可持续性多学科

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道威棱镜的角度公差

光学技术 1986年第6期 28-29页

作者： s.k.gupta ,R·Hradaynath ,许立国西安朝阳仪器厂

道威棱镜(有时也称半速棱镜)广泛地应用在光学仪器当中。这种棱镜产生倒象而不改变瞄准线的方向。从几何形状来看,道威棱镜有两个45°的底角,截去该棱镜的棱角使其平行于底面,这样就保证了底面反射是属于完全内反射。这种几何形状使得... 详细信息

道威棱镜(有时也称半速棱镜)广泛地应用在光学仪器当中。这种棱镜产生倒象而不改变瞄准线的方向。从几何形状来看,道威棱镜有两个45°的底角,截去该棱镜的棱角使其平行于底面,这样就保证了底面反射是属于完全内反射。这种几何形状使得道威棱镜尺寸缩小并且也减少了光能的反射损失。在光学设计中,通常的做法是根据出射光束与入射光束的光轴偏角给定道威棱镜的设计

关键词：道威棱镜轴偏角误差角

A Comprehensive survey on Federated Learning Applications in Computational Mental Healthcare

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Computer Modeling in Engineering & sciences 2025年第1期142卷 49-90页

作者： Vajratiya Vajrobol Geetika Jain saxena Amit Pundir sanjeev singh Akshat Gaurav savi Bansal Razaz Waheeb Attar Mosiur Rahman Brij B.gupta Institute of Informatics and Communication University of DelhiDelhi110021India Maharaja Agrasen College University of DelhiDelhi110096India Computer Engineering Ronin InstituteMontclairNJ 07043USA Department of Research and Innovation Insights2TechinfoJaipur302001India University Centre for Research and Development(UCRD) Chandigarh UniversityChandigarh140413India Management Department College of Business AdministrationPrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia CCRI&Department of Computer science and Information Engineering Asia UniversityTaichung413Taiwan symbiosis Centre for Information Technology(sCIT) Symbiosis International UniversityPune411057India Center for Interdisciplinary Research University of Petroleum and Energy Studies(UPES)Dehradun248007India

Mental health is a significant issue worldwide,and the utilization of technology to assist mental health has seen a growing *** aims to alleviate the workload on healthcare professionals and aid *** applications have been developed to support the challenges in intelligent healthcare ***,because mental health data is sensitive,privacy concerns have *** learning has gotten some *** research reviews the studies on federated learning and mental health related to solving the issue of intelligent healthcare *** explores various dimensions of federated learning in mental health,such as datasets(their types and sources),applications categorized based on mental health symptoms,federated mental health frameworks,federated machine learning,federated deep learning,and the benefits of federated learning in mental health *** research conducts surveys to evaluate the current state of mental health applications,mainly focusing on the role of Federated Learning(FL)and related privacy and data security *** survey provides valuable insights into how these applications are emerging and evolving,specifically emphasizing FL’s impact.

关键词： Depression emotional recognition intelligent healthcare systems mental health federated learning stress detection sleep behaviour

Propagation of P-and s-waves in initially stressed gravitating half space

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Applied Mathematics and Mechanics(English Edition) 2013年第7期34卷 847-860页

作者： s. gupta s. k. VIsHWAkARMA Department of Applied Mathematics Indian School of Mines

The present paper contributes in studying the phase velocities of P- and s-waves in a half space subjected to a compressive initial stress and gravity field. The density and acceleration due to gravity vary quadratically along the depth. The dispersion equation is derived in a closed form. It is shown that the phase velocities depend not only on the initial stress, gravity, and direction of propagation but also on the inhomogeneity parameter associated with the density and acceleration due to gravity. Various particular cases are obtained, and the results match with the classical results. Numerical investigations on the phase velocities of P- and s-waves against the wave number are made for various sets of values of the material parameters, and the results are illustrated graphically. The graphical user interface model is developed to generalize the effect.

关键词： P-wave s-wave initial stress gravity half space graphical user interface

Biosorption of Ni(Ⅱ) ions from aqueous solution using modified Aloe barbadensis Miller leaf powder

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Water science and Engineering 2019年第1期12卷 27-36页

作者： shweta gupta s.k.sharma Arinjay kumar University school of Chemical Technology Guru Gobind Singh Indraprastha University

This study aimed to investigate the biosorption potential of Na2CO3-modified Aloe barbadensis Miller (Aloe vera) leaf (MABL) powder for removal of Ni(II) ions from a synthetic aqueous solution. Effects of various process parameters (pH, equilibrium time, and temperature) were investigated in order to optimize the biosorptive removal. The maximum biosorption capacity of MABL was observed to be 28.986 mg/g at a temperature of 303 k, a biosorbent dose of 0.6 g, a contact time of 90 min, and a pH value of 7. Different kinetic models (the pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models) were evaluated. The pseudo-second-order kinetic model was found to be the best fitted model in this study, with a coefficient of determination of R^2 =0.974. Five different isotherm models (the Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, and Brunauer-Emmett-Teller (BET) models) were investigated to identify the best-suited isotherm model for the present system. Based on the minimum chi-square value (X^2 =0.027) and the maximum coefficient of determination (R^2 =0.996), the Langmuir isotherm model was found to represent the system well, indicating the possibility of monolayer biosorption. The sticking probability (s*) was found to be 0.41, suggesting a physisorption mechanism for biosorption of Ni(II) on MABL. The biosorbent was characterized using Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (sEM), zeta potential, and BET surface area, in order to understand its morphological and functional characteristics.

关键词： Biosorption A. barbadensis Miller leaf powder Ni(II) Biosorption isotherm sticking probability kinetics