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Assessing temporal variation of coloured dissolved organic matter in the coastal waters of south Eastern Arabian sea

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Acta Oceanologica sinica 2020年第1期39卷 102-109页

作者： p Minu v p souda s k Baliarsingh R M Dwivedi Y Ali p M Ashraf ICAR-Central Institute of Fisheries Technology Matsyapuri P.O.Cochin 682029India Indian National Centre for Ocean Information services(INCOIs) Hyderabad 500090India Department of Geology Aligarh Muslim UniversityAligarh 202001India

Coloured dissolved organic matter(CDOM) plays a major role in marine photochemical and biological processes and its optical properties are known to affect the underwater light penetration. This paper highlights in situ optical estimation and satellite retrieval of CDOM in deciphering its temporal variations in coastal waters of the south Eastern Arabian sea. The study accentuated the source of CDOM as terrigenous origin during monsoon, of in situ productions during pre-monsoon and during post-monsoon of autochthonous-allocthonous origin. The matchup analysis for in situ and MODIs Aqua retrieved Adg443 exhibited bias which decreased by incorporating the seasonal component. The study also identified degrading bloom of Noctiluca scintillans as the source for exceptionally high CDOM in the area during January and February. The study demands to incorporate seasonal components and phytoplankton abundance while assessing the performance of CDOM algorithms in optically complex coastal waters.

关键词： CDOM absorption chlorophyll MODIs Arabian sea

Non-spherical Gravitational Collapse of strange Quark Matter

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Chinese physics Letters 2008年第5期25卷 1568-1570页

作者： Zade s s patil k D Mulkalwar p N Department of Mathematics J. B. College of Science Wardha India Department of Mathematics B. D. College of Engineering Sewagram Wardha India Department of Computer science Amolakchand Mahavidyalaya Yavatmal India

We study the non-spherical gravitational collapse of the strange quark null fluid. The interesting feature which emerges is that the non-spherical collapse of charged strange quark matter leads to a naked singularity whereas the gravitational collapse of neutral quark matter proceeds to form a black hole. We extend the earlier work of Harko and Cheng [phys. Lett. A 266 （2000） 249] to the non-spherical case.

关键词： NAkED sINGULARITIEs COsMIC CENsORsHIp spACETIMEs

CaMoO_4:Dy^(3+),k^+ near White Light Emitting phosphor:structural,Optical and Dielectric properties

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Journal of Materials science & Technology 2013年第7期29卷 633-638页

作者： s.k.sharma s.Dutta s.som p.s.Mandal Department of Applied physics Indian School of MinesDhanbad 826004India

Undoped, Dy^3＋ doped and Dy^3＋, k^＋ codoped calcium molybdate phosphors have been synthesized by solid-state reaction method. X-ray diffraction studies reveal the tetragonal structure of the prepared phosphors having crystallite size 15-50 nm. scanning electron microscopy （sEM） studies reveal the morphology and crystallite size of the prepared phosphors. photoluminescence studies indicate that there are blue and yellow emissions at 489 and 576 nm, respectively corresponding to Dy^3＋ ion. The introduction of k＋ ion significantly influences the blue and yellow emissions which causes the near white light emission from this codoped phosphor. The intense absorption peak of the codoped phosphor at 210 nm is attributed to the band gap and a shoulder at 240 nm appears due to charge transfer from oxygen ions to neighbouring molybdenum ions. The band gap of the codoped phosphor is calculated as 5.5 ev from the absorption studies. The dielectric properties such as permittivity and dielectric loss are studied as a function of *** The authors are thankful to the Department of science and Technology, New Delhi （Government of India） for funding this work under the project sR/FTp/ps-087/2010.

关键词： X-ray diffraction photoluminescence Absorption Dielectric

performance of inclined pillars with a major discontinuity

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International Journal of Mining science and Technology 2019年第3期29卷 437-443页

作者： k.v.Jessu A.J.s.spearing Western Australia school of Mines kalgoorlie Curtin University

Discontinuities are an inherent part of the rock mass and majorly affect the stability of the excavation skin and *** dip of the discontinuities and their properties also have a significant effect on the strength of the *** approaches are commonly used to determine the pillar strength but can overestimate the strength and don’t consider the inclination of the pillars and the strength reduction caused by *** modeling is a powerful tool and if calibrated can be used to evaluate the strength of the pillars with discontinuities having a range of *** effect of a discontinuity on inclined pillars was conducted which has been seldom considered in evaluating the pillar ***-dimensional vertical pillars were simulated,and the pillar strength was calibrated to accepted theoretical results and then the discontinuities were introduced in different pillar inclinations with distinct width to height ratios to gain an insight into the effective pillar strength *** upon the results,it was found that the discontinuities have a significant effect with the increase in the inclination of the pillars even at a higher width to height ratios.

关键词： Numerical modelling pillar Discontinuities Inclination Width to height ratios

Regulator of G protein signaling 6 mediates exercise-induced recovery of hippocampal neurogenesis,learning,and memory in a mouse model of Alzheimer’s disease

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Neural Regeneration Research 2025年第10期20卷 2969-2981页

作者： Mackenzie M.spicer Jianqi Yang Daniel Fu Alison N.Devore Marisol Lauffer Nilufer s.Atasoy Deniz Atasoy Rory A.Fisher Department of Neuroscience and pharmacology University of Iowa Carver College of MedicineIowa CityIAUSA Iowa Neuroscience Institute University of Iowa Carver College of MedicineIowa CityIAUSA Interdisciplinary Graduate program in Molecular Medicine University of Iowa Carver College of MedicineIowa CityIAUSA Neural Circuits and Behavior Core University of Iowa Carver College of MedicineIowa CityIAUSA

Hippocampal neuronal loss causes cognitive dysfunction in Alzheimer’s *** hippocampal neurogenesis is reduced in patients with Alzheimer’s *** stimulates adult hippocampal neurogenesis in rodents and improves memory and slows cognitive decline in patients with Alzheimer’s ***,the molecular pathways for exercise-induced adult hippocampal neurogenesis and improved cognition in Alzheimer’s disease are poorly ***,regulator of G protein signaling 6(RGs6)was identified as the mediator of voluntary running-induced adult hippocampal neurogenesis in ***,we generated novel RGs6fl/fl;App_(sWE) mice and used retroviral approaches to examine the impact of RGs6 deletion from dentate gyrus neuronal progenitor cells on voluntary running-induced adult hippocampal neurogenesis and cognition in an amyloid-based Alzheimer’s disease mouse *** found that voluntary running in App_(sWE) mice restored their hippocampal cognitive impairments to that of control *** cognitive rescue was abolished by RGs6 deletion in dentate gyrus neuronal progenitor cells,which also abolished running-mediated increases in adult hippocampal *** hippocampal neurogenesis was reduced in sedentary App_(sWE) mice versus control mice,with basal adult hippocampal neurogenesis reduced by RGs6 deletion in dentate gyrus neural precursor ***6 was expressed in neurons within the dentate gyrus of patients with Alzheimer’s disease with significant loss of these RGs6-expressing ***,RGs6 mediated voluntary running-induced rescue of impaired cognition and adult hippocampal neurogenesis in App_(sWE) mice,identifying RGs6 in dentate gyrus neural precursor cells as a possible therapeutic target in Alzheimer’s disease.

关键词： adult hippocampal neurogenesis Alzheimer’s disease dentate gyrus exercise learning/memory neural precursor cells regulator of G protein signaling 6(RGs6)

Effect of substrate and Annealing Temperatures on Mechanical properties of Ti-rich NiTi Films

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Journal of Materials science & Technology 2010年第11期26卷 961-966页

作者： A.kumar s.k.sharma s.Bysakh s.v.kamat s.Mohan Defence Metallurgical Research Laboratory Department of Instrumentation Indian Institute of Science Central Glass and Ceramics Research Institute

The effect of substrate and annealing temperatures on mechanical properties of Ti-rich NiTi films deposited on si （100） substrates by DC magnetron sputtering was studied by *** films were deposited at two substrate temperatures viz.300 and 400 ℃.NiTi films deposited at 300 ℃ were annealed for 4 h at four different temperatures,i.e.300,400,500 and 600 C whereas films deposited at 400 ℃ were annealed for 4 h at three different temperatures,i.e.400,500 and 600 ℃.The elastic modulus and hardness of the films were found to be the same in the as-deposited as well as annealed conditions for both substrate *** a given substrate temperature,the hardness and elastic modulus were found to remain unchanged as long as the films were ***,both elastic modulus and hardness showed an increase with increasing annealing temperature as the films become *** results were explained on the basis of the change in microstructure of the film with change in annealing temperature.

关键词： NiTi thin film Annealing Nanoindentation

Comparative analysis of entanglement measures based on monogamy inequality

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Chinese physics B 2017年第5期26卷 52-59页

作者： p J Geetha sudha k s Mallesh Department of physics Kuvempu University Shankaraghatta Shimoga-577 451 India Inspire Institute Inc. Alexandria Virginia 22303 USA Department of studies in physics University of Mysore Mysore-570 006 India

We evaluate the monogamy inequality for symmetric, non-symmetric pure states of importance in terms of squared concurrence, squared entanglement of formation, squared negativity of partial transpose and compare the corresponding tangles. We show that though concurrence and concurrence tangle are zero for two special classes of mixed entangled states, both negativity tangle and entanglement of formation（EOF） tangle turn out to be non-zero. A comparison of different tangles is carried out in each case and it is shown that while the concurrence tangle captures the genuine multiqubit entanglement in N-qubit pure states with N distinct spinors（containing GHZ and superposition of W-, obverse W states）either negativity tangle or EOF tangle is to be used as a better measure of entanglement in the W-class of states with two distinct spinors and in the special classes of mixed multiqubit states.

关键词： entanglement tangle negativity superposition inequality entangled symmetric vanishing squared arbitrary

studies on composite solid propellant with tri-modal ammonium perchlorate containing an ultrafine fraction

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Defence Technology（防务技术） 2017年第4期13卷 239-245页

作者： k.v. suresh Babu p. kanaka raju C.R. Thomas A. syed Hamed k.N. Ninan solid propellant space Booster plant Satish Dhawan Space Centre Sriharikota 524124 India Rocket propellant plant Vikram Sarabhai Space Centre Thiruvananthapuram 695 022 India Department of Chemistry Indian Institute of Space Science and Technology Thiruvananthapuram 695 547 India

Composite solid propellant is prepared using tri-modal Ammonium perchlorate(Ap)containing coarse,fine and ultrafine fractions of Ap with average particle size(Aps)340,40 and 5 mm respectively,in various compositions and their rheological,mechanical and burn rate characteristics are *** optimum combination of Ap coarse to fine to ultrafine weight fraction was obtained by testing of series of propellant samples by varying the Ap fractions at fixed solid *** concentration of aluminium was maintained constant throughout the experiments for ballistics *** propellant formulation prepared using Ap with coarse to fine to ultrafine ratio of 67:24:9 has lowest viscosity for the propellant paste and highest tensile strength due to dense packing as supported by the literature.A minimum modulus value was also observed at 9 wt.%of ultrafine Ap concentration indicates the maximum solids packing density at this ratio of Ap *** burn rate is evaluated at different pressures to obtain pressure *** of ultrafine fraction of Ap in propellant increased burn rate without adversely affecting the pressure *** solid loading propellants are prepared by increased Ap concentration from 67 to 71 wt.%using Ap with coarse to fine to ultrafine ratio of67:24:*** solid content up to 89 wt.%was achieved and hence increased solid motor *** unloading viscosity showed a trend with increased Ap content and the propellant couldn't able to cast beyond 71 wt.%of *** properties were also studied and from the experiments noticed that%elongation decreased with increased Ap content from 67 to 71 wt.%,whereas tensile strength and modulus *** rate increased with increased Ap content and observed that pressure exponent also increased and it is high for the propellant containing with 71 wt.%of Ap due to increased oxidiser to fuel *** composite solid propellant is prepared by using burn rate modifie

关键词： Ammonium perchlorate Composite propellant Burn rate Copper chromite Iron oxide

Induction reheating of A356.2 aluminum alloy and thixocasting as automobile component

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中国有色金属学会会刊：英文版 2010年第S3期20卷 961-967页

作者： H.LAksHMI M.C.vINAY kUMAR RAGHUNATH p.kUMAR v.RAMANARAYANAN k.s.s.MURTHY p.DUTTA National Facility for semisolid Forming Department of Mechanical EngineeringIndian Institute of Science Department of Electrical Engineering Indian Institute of Science

The development work for producing an automobile component by thixocasting using A356.2 alloy was *** the first step,the alloy was electromagnetically stirred and solidified to produce a billet with non-dendritic *** microstructure depended on several process parameters such as stirring intensity,stirring frequency,cooling rate,and melt initial *** a series of computational studies and controlled experiments,a set of process parameters were identified to produce the best *** of a billet with non-dendritic microstructure to a semisolid temperature was the next step for thixo-casting of the *** reheating process was characterized for various reheating cycles using a vertical-type reheating *** induction heating cycle was optimized to obtain a near-uniform temperature distribution in radial as well as axial direction of the billet,and the heating was continued until the liquid fraction reached about 50%.These parameters were determined with the help of a computational fluid dynamics(CFD) model of die filling and solidification of the semisolid *** heated billets were subsequently thixo-cast into automobile components using a real-time controlled die casting *** results show that the castings are near net shape,free from porosity,good surface finish and have superior mechanical properties compared to those produced by conventional die casting processes using the same alloy.

关键词： aluminum alloy thixo-casting electromagnetic stirring induction reheating process parameters