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球状星团NGc4147天区115颗恒星的绝对自行和BVRI测光

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中国科学院上海天文台年刊 1998年第19期 28-34页

作者：王家骥 a.c.gupta 中国科学院上海天文台 DepartmentofPhysics UniversityofGorakhpurGorakhpur273009India

以上海天文台佘山40cm折射望远镜于1958年拍摄的3张照相底片为第一期资料，印度Kavalur的2．34mVainuBappu望远镜于1996年用ccD拍摄的4幅图象为第二期资料，使用Brosche等人1985年发表的球状星团NGc4147天区42颗恒星的位置和绝对自行作... 详细信息

以上海天文台佘山40cm折射望远镜于1958年拍摄的3张照相底片为第一期资料，印度Kavalur的2．34mVainuBappu望远镜于1996年用ccD拍摄的4幅图象为第二期资料，使用Brosche等人1985年发表的球状星团NGc4147天区42颗恒星的位置和绝对自行作为参考架，用中心重叠法进行天体测量归算，得到了这个星团中心附近11'×11'天区内到B=17．6mag为止115颗恒星的位置和绝对自行，并利用这些自行对成员概率作了估计。同时，还用VainuBappu望远镜的ccD进行了BVRI四色测光。本文给出了这115颗恒星的位置、绝对自行和成员概率数据，同时，还给出了用VainuBappu望远镜的ccD获得的这些恒星的BVRIM光数据。

关键词：球状星团恒星绝对自行照相天体测量 BVRI测光

球状星团NGc4147的绝对自行和颜色星等图

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天文学报 1998年第1期39卷 67-75页

作者：王家骥 a.c.gupta 国科学院上海天文台 DepartmentofPhysics UniversityofGorakhpur

本文以上海天文台佘山40厘米折射望远镜于1958年拍摄的3张照相底片为第一期，印度Kavalur的234米VainuBappu望远镜于1996年用ccD拍摄的4幅图像为第二期，使用Brosche等1985年发表的球状星团NGc4147天区42颗恒星的位置和绝对自行作为参... 详细信息

本文以上海天文台佘山40厘米折射望远镜于1958年拍摄的3张照相底片为第一期，印度Kavalur的234米VainuBappu望远镜于1996年用ccD拍摄的4幅图像为第二期，使用Brosche等1985年发表的球状星团NGc4147天区42颗恒星的位置和绝对自行作为参考架，用中心重叠法进行天体测量归算，得到了这个星团中心附近11'×11'天区内到B＝17.6为止115颗恒星的位置和绝对自行，利用这些自行对成员概率作了估计.本文还给出了用VainuBappu望远镜ccD测光结果得到的这个星因水平文和巨星支恒星V与B-V．V－R和V－I颜色星等图，并对这些颜色星等图和团自行作了讨论，得到这个星团的赤经方向绝对自行为-2.82±0.49mas／yr，赤纬方向绝对自行为2.37±0.43mas／yr.

关键词：球状星团自行颜色星等图绝对自行星系集团

Sources and Deficiency Diseases of Mineral Nutrients in Human Health and Nutrition:A Review

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Pedosphere 2014年第1期24卷 13-38页

作者： U.c.gupta S.c.gupta Agriculture and Agri-canada canada Crops and Livestock Research Centre The Department of Plastic Surgery Loma Linda University

Mineral nutrients are fundamentally metals and other inorganic compounds. The life cycle of these mineral nutrients begins in soil, their primary source. Soil provides minerals to plants and through the plants the minerals go to animals and humans; animal products are also the source of mineral nutrients for humans. Plant foods contain almost all of the mineral nutrients established as essential for human nutrition. They provide much of our skeletal structure, e.g., bones and teeth. They are critical to countless body processes by serving as essential co-factors for a number of enzymes. Humans can not utilize most foods without critical minerals and enzymes responsible for digestion and absorption. Though mineral nutrients are essential nutrients, the body requires them in small, precise amounts. We require them in the form found in crops and they can be classified into three different categories： major, secondary, and micro or trace minerals. This classification is based upon their requirement rather than on their relative importance. Major minerals such as potassium （K） and phosphorus （P） are required in amounts of up to 10 g d-1. The daily requirement of secondary and micro minerals ranges from 400 to 1 500 mg d-1 and 45 ~tg d-1 to 11 mg d-1, respectively. To protect humans from mineral nutrient deficiencies, the key is to consume a variety of foods in modest quantities, such as different whole grains, low fat dairy, and different meats, vegetables and fruits. For insurance purposes, a supplement containing various mineral nutrients can be taken daily.

关键词： deficiency diseases deficiency symptoms origin recommended daily dose toxicity

Duration distributions for different softness groups of gamma-ray bursts

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Science china(Physics,Mechanics & Astronomy) 2010年第7期53卷 1375-1382页

作者： gupta A.c. Aryabhatta Research Institute of Observational Sciences(ARIES) Manora PeakNainital-263129India

Gamma-ray bursts(GRBs) are divided into two classes according to their *** investigate if the softness of bursts plays a role in the conventional classification of the *** employ the BATSE(Burst and Transient Source Experiment) catalog and analyze the duration distributions of different groups of GRBs associated with distinct *** analysis reveals that the conventional classification of GRBs with the duration of bursts is influenced by the softness of the *** exists a bimodality in the duration distribution of GRBs for each group of bursts and the time position of the dip in the bimodality histogram shifts with the softness *** findings suggest that the conventional classification scheme should be modified by separating the two well-known populations in different softness groups,which would be more reasonable than doing so with a single *** to the relation between the dip position and the softness parameter,we get an empirical function that can roughly set apart the short-hard and long-soft bursts:SP =(0.100 ± 0.028) T-(0.85 0.18) 90,± where SP is the softness parameter adopted in this paper.

关键词： gamma-rays bursts:methods data analysis:methods statistical

Seismic wave velocities of rare gas solids through elastic properties in Earth's lower mantle

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Science china Earth Sciences 2009年第10期52卷 1599-1611页

作者： Seema gupta Suresh c. GOYAL Department of Physics Agra College Faculty of Engineering and Technology Raja Balwant Singh College

The expressions for second (SOE) and third order elastic (TOE) constants for rare gas solids are derived for comparative study of elastic behavior within the framework of many body potentials including the effect of p... 详细信息

关键词： elastic properties seismic wave velocities RGS

Spatio-temporal variability in microfossil and geochemical records of cenomanian-Turonian oceanic anoxic event-2:a review

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Journal of Palaeogeography 2024年第4期13卷 646-674页

作者： c.P.Sooraj Shweta gupta Jahnavi Punekar Department of Earth Sciences Indian Institute of Technology BombayPowaiMumbai 400076India

The cenomanian-Turonian boundary oceanic anoxic event(OAE-2;Bonarelli event;~94 Ma)is associated with a species turnover in the marine calcareous microfossil record,widespread marine anoxia,black shale deposition and positiveδ13c *** study reviews 141 cTBE sites globally,aiming to understand micropaleontological,geochemical,and sedimentological expressions of *** is a clear palaeogeographic and palaeobathymetric heterogeneity in the development of OAE-2 marine anoxia.A majority of the documented OAE-2 sites are from deep marine *** calcareous nannoplankton and benthic foraminifera record a diversity decline,while planktic foraminifera shows community level shifts and no major mass *** variability of total organic carbon in OAE-2 sediments across sites(10 wt.%)and theδ13c profiles(diachronous)have been attributed to different mechanisms of anoxia *** increased primary“productivity model”gains support from productivity proxies(e.g.,Ba,P,cu,Ni),redox-sensitive elements(e.g.,Mn,Mo,U,V,As),and eutrophic genera(e.g.,benthic foraminifera Gabonita spp.,calcareous nannofossils Biscutum *** Zeugrhabdotus erectus).The enhanced organic carbon“preservation model”in stratified(semi)restricted basins gains support from sites with lower enrichment of redox-sensitive elements and oligotrophic flora and fauna in the OAE-2 *** of the caribbean and the High Atlantic Large Igneous Province events(cLIP and HALIP)mark them as likely triggers of the OAE-2 related global perturbation of marine *** triggers may have caused climate warming,altered hydrological cycles,enhanced continental weathering,shifts in ocean circulation,and nutrient *** knowledge gaps,further research is urged,utilizing innovative proxies,and exploring underrepresented depositional systems to comprehensively understand OAE-2 onset and biotic crisis.

关键词： Oceanic anoxic Event-2 Global organic carbon distribution Geochemical proxies Marine calcifiers Palaeoceanography

Three dimensional free convection couette flow with transpiration cooling

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第3期7卷 340-346页

作者： JAIN N. c. gupta P. Department of Mathematics University of Rajasthan Jaipur-302004 India Department of Mathematics Apex Institute of Engineering and Technology Jaipur-302022 India

Free convection flow between two vertical parallel plates with transverse sinusoidal injection of the fluid at the stationary plate and its corresponding removal by constant suction through the plate in uniform motion has been analyzed. Due to this type of injection velocity, the flow becomes three-dimensional. Analytical expressions for the velocity, temperature, skin friction and rate of heat transfer were obtained. The important characteristics of the problem, namely the skin friction and the rate of heat transfer are discussed in detail with the help of graphs.

关键词： couette flow Free convection Three-dimensional flow Transpiration cooling Transverse sinusoidal injection

Improved thermoelectric property of cation-substituted caMnO_3

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chinese Physics B 2015年第9期24卷 542-547页

作者： Pradeep Kumar Subhash c.Kashyap Vijay Kumar Sharma H.c.gupta Department of Physics Shyam Lal CollegeUniversity of Delhi Department of Physics Indian Institute of Technology Delhi

Single-phase pristine and cation-substituted calcium manganite（ca1-xBixMn1-yVyO3-δ） polycrystalline samples were synthesized by the solid state reaction technique. Their thermoelectric properties were measured by a set up that was designed and assembled in the laboratory. The ca1-x BixMn1-yVyO3-δsample with x = y = 0.04 has shown a power factor（S^2σ） of 176 μW/m/K^2 at 423 K, which is nearly two orders of magnitude higher than that of the pristine sample（2.1 μW/m/K2）. The power factor of the substituted oxide remains almost temperature independent as the Seebeck coefficient increases monotonically with temperature, along with the simultaneous decrease in electrical resistivity which is attributed to enhanced electron density due to co-doping of bismuth and vanadium and grain boundary scattering. These cation-substituted calcium manganites can be used as a potential candidate for an n-type leg in a thermoelectric generator（module）.

关键词： thermoelectric materials solid state reaction Seebeck coefficient power factor

Virtual reality based apps are the future of patient:counseling

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World Journal of clinical cases 2025年第6期13卷 58-60页

作者： Ranjan K Behera Arvind K Morya Parul c gupta Arshi Singh Department of Ophthalmology MMIMSR Mullana AmbalaAmbala 133207HaryānaIndia Department of Ophthalmology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Ophthalmology Post Graduate Institute of Medical Education and ResearchChandigarh 160012PunjabIndia Department of Ophthalmology Guru Nanak Eye CentreNew Delhi 110001New DelhiIndia

The use of virtual reality to educate preoperative patients has a positive impact on nurses as well as patients undergoing *** can help improve patient satisfaction and improve favorable outcomes by reducing patient anxiety and proving adequate knowledge about the procedure and possible outcomes to the *** also reduces burden on nursing staff and *** and more diverse cohort studies will help us understand the wider application of this tool on the patient *** may be difficult to apply this tool on elderly patients with failing eyesight,multiple physical ***,there may be reduced acceptance of this modality by older nursing staff and practitioners who may prefer the traditional verbal version for *** will benefit from a combined approach of using virtual reality apps with tradition one-on-one counselling to help alleviate patient concerns and improve patient and healthcare professional satisfaction.

关键词： Nurse Patient Virtual reality counselling Healthcare