Ranchi University is a university in Jharkhand state of India. It was established on 12 July 1960 as a teaching-cum-affiliating university, and its first vice chancellor was Vishnudeo Narayan Singh. It is headquartered in Ranchi, the capital city of Jharkhand. The university has a total student intake of around 90,000 students from its affiliated colleges. It has a central library with approximately 150,000 books for the academic needs of the students. Wikipedia.
Singh R.P.,Ranchi University |
Prasad P.V.V.,Kansas State University |
Reddy K.R.,Mississippi State University
Advances in Agronomy | Year: 2013
Agriculture is extremely sensitive to climate and weather conditions. The resilience of our crop production systems to changes in climate can be enhanced by improved understanding impacts and responses of crops to changing climates. Several countries in Asia and Africa are at the risk of losing about 280 million tons of potential cereal production as a result of climate change factor, particularly increasing temperatures and prolonged dry periods. The most significant negative changes for developing countries in Asia, where agricultural production declines of about -4% to -10% are anticipated under different socioeconomic and climate change scenarios. Rising temperatures will reduce the amount of fertile farmland, and by 2050, the amount of maize grown is expected to decline by 6-23% and wheat by 40-45%. The majority of the world's food supply comes from the consumption of seeds from grain crops (wheat, rice, maize, soybean, barley, and sorghum), which are most vulnerable to changing climates. The growth in food production is lower than the population growth; therefore, there will be challenges of food security. Major impacts of climate change will be on rain-fed crops that account for nearly 60% of cropland area. As predicted, South Asia and sub-Saharan Africa will be highly vulnerable to climate change. Crop production can be increased by the use of quality seeds of high-yielding stress-tolerant varieties, combined with judicious use of inputs, particularly water and nutrients. Climate changes affect all four dimensions of food security, that is, availability, access to food, stability of food supplies, and food utilization. The seed industry plays an important role in increasing food production. It provides high-quality seeds of high-yielding varieties in adequate quantities at the right time and right place. Climate change influences the population dynamics of insects, emergence of new pests, changing status of pest and disease development, and evolution of new races of pests. Quality seed production is also affected by crop/weed interactions, loss of pollinator biodiversity, and genetic diversity. The seed crop is also affected by climate change regarding change in crop phenology, reproduction, flowering, anthesis/pollen viability, and pollination/fertilization, length of seed-filling duration, seed setting, seed size, seed dormancy, seed yield, and ultimately seed quality. Therefore, the cost of seed production is likely to increase in changing climate due to scheduling of operations, land and water management, herbicide/insecticide applications, pollination management, and postharvest seed management. Issues regarding intellectual property rights (IPR) related to seed, including patent infringements, prevalence of monocultures, consolidations of transnational corporations through acquisitions and mergers, and biodiversity and pollinator-loss related issues further complicate the problem. The lack of trained conventional plant breeders, crop physiologists, and seed technologists and stronger interdisciplinary collaboration between agronomists and biologists need attention. Further, acceptance of engineered crop or seed, increasing cost of genetically engineered (GE) seed as compared with conventional seed with no yield advantage, increasing number of herbicide applications, culminate in loss in net farm income in developed countries. In this article, the issues regarding the impact of climate change (particularly increasing temperature and carbon dioxide concentrations) on seed production, the present trend of the global seed industry, are discussed. © 2013 Elsevier Inc.
Dreze J.,Ranchi University |
Khera R.,Indian Institute of Technology Delhi
Economic and Political Weekly | Year: 2015
This article attempts to resolve the puzzle of public distribution system leakages using the latest available data. Leakages remain high, but there is clear evidence of improvement in recent years, especially in states - including Bihar - that have undertaken bold PDS reforms. The main source of leakages is the "above the poverty line" quota, which is due to be phased out under the National Food Security Act.
Patil S.S.,Ranchi University |
Shahiwala A.,Dubai Pharmacy College
Expert Opinion on Therapeutic Patents | Year: 2014
Introduction: Oral-controlled and modified-release drug delivery systems with zero-order sustained-release kinetics have been developed and proven suitable for meeting increasingly sophisticated therapeutic needs. Nevertheless, the impact of basic chronobiology concepts on the practice of medicine is still ongoing and to address chronotherapy needs, various types of pulsatile drug delivery systems have been innovated. The purpose of this review is to highlight these innovations in the field of chronotherapy.Areas covered: The present review discusses in depth on recent patents and developments related to pulsatile drug delivery systems with eroding, soluble or rupturable barrier coatings, and systems with capsular structures. Besides focusing on all recent innovations, the review addresses the novelty and feasibility of all upcoming technologies being exploited considering pulsatile drug delivery systems.Expert opinion: There has been a growing interest in pulsatile delivery, which generally refers to the liberation of drugs following a programmable and well-defined lag phase from the time of administration. From 1981 until the present date, patent publications related to pulsatile drug delivery have shown more promising systems with numerous developments in arena of drug delivery. Future development of chronotherapeutic medications requires proper assessment and integration with other emerging disciplines such as hydrogel and transdermal delivery systems. The selection of the appropriate chronopharmaceutical technology should take into considerations with the ease of manufacturing and the cost-effectiveness. © 2014 Informa UK, Ltd.
Rana N.K.,JN College |
Prasad J.N.,Ranchi University
Indian Journal of Physics | Year: 2012
We have investigated the effects of local relaxation on the electronic structure of Mn atoms in (GaMn)As and the related properties of this dilute magnetic semiconductor (DMS). The nearest neighbours of the substitutional Mn atom have been considered for relaxed and non-relaxed conditions, while the other atoms have been left unaffected by the Mn impurity. Gallium Arsenide (GaAs), when doped with Mn atoms in a small concentration, becomes ferromagnetic retaining its semiconductor properties and it also acquires half metallic character. These characteristics of this DMS are vital for spintronic applications. We have implemented the scheme of pseudopotential method within the density functional formalism to calculate the electronic structure of (GaMn)As and computed the total density of states and partial density of states under the supercell scheme for unrelaxed and relaxed nearest neighbours of the substitutional Mn atom. We have also discussed a more realistic approach to calculate the local magnetic moment in this kind of systems. At the end, we have discussed the relevance of the present research work in the spintronic applications. © 2012 IACS.
Singh S.,Ranchi University |
Ooi C.H.R.,University of Malaya |
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2012
Exact solutions are obtained for a collective model of two identical two-level atoms interacting with a quantized bimodal field with intensity-dependent coupling terms in a lossless cavity. A unitary transformation method is used to solve the time-dependent problem that also gives the eigensolutions of the interaction Hamiltonian. The atomic population dynamics and the dynamics of the photon statistics of the two cavity modes are studied. We present evidence of cooperative effects. © 2012 American Physical Society.
Singh S.,Ranchi University |
Journal of Modern Optics | Year: 2013
We study the entanglement properties of a pair of two-level Rydberg atoms passing one after another into a lossless cavity with two modes. The atoms interact with the cavity field via an intensity-dependent, non-degenerate two-photon transition. The initial joint state of two successive atoms that enter the cavity is unentangled. Interactions mediated by the two-mode cavity photon field result in the final two-atom mixed entangled type state. The entanglement of formation of the joint two-atom state as a function of the Rabi angle, gt, is calculated for the two-mode Fock state field, coherent field, and thermal field, respectively, inside the cavity. The change in the magnitude of atomic entanglement with cavity photon number in two modes has been studied. © 2013 Copyright Taylor and Francis Group, LLC.
Shrivastava A.K.,Ranchi University
Procedia Computer Science | Year: 2016
Information technology infrastructure trigger unending concern for IT players accountable for information security. Sensitive organization information can be easily acquired and lost. The community dearth of self-confidence in information technology (IT) infrastructure is not purely about security of worth, but also about faith in the information group. Integrity, privacy and vulnerability security fears are the important cause web user is not confident over the web. Proposes to investigate the integrity, privacy and vulnerability security fears of IT user in order to establish a consensus among them. Uses data from 127 contributors to come to a decision that the following major concerns (in the descending of importance) exist: integrity, privacy, security and fears, unauthorized access, data leaked, impersonation and forged identity and e-mail safety. The objective of the survey was to collect statistics to quantify the influence of Information technology infrastructure on organization information security. © 2016 The Authors.
Singh S.,Ranchi University |
International Journal of Theoretical Physics | Year: 2012
In the present paper, the eigenfunctions and eigenvalues of the Hamiltonian of the interacting system have been obtained in two generalized Jaynes Cummings models separately, one in which the transition are mediated by two different modes of photon in the ladder configuration and the other involving two mode multi-photon interaction between the field and the atom. Effect of intensity dependent coupling between the field and the atom in both the above-mentioned cases have been investigated. Graphical features of the time dependence of population inversion have been analyzed when one of the field modes is prepared initially in a coherent state while the other one in a vacuum state. The unitary transformation method presented here for the special case of exact resonance not only solves the time-dependent problem but also provides the eigensolutions of the interacting Hamiltonian at the same time. © 2011 Springer Science+Business Media, LLC.
Verma S.K.,Ranchi University |
Alim A.,Ranchi University
PLoS ONE | Year: 2014
The present study was carried out to analyze the differences in the activity of hormone stanniocalcin (STC) between male and female fishes of Mastacembelus armatus during their gonadal cycle. A large variation in nuclear diameter of cells of corpuscles of Stannius (CS) were recorded in relation to testicular cycle as well as ovarian cycle which indicates that the cellular activity varied with different phases of reproductive cycle in both male and female fish. Similar changes in nuclear diameter of CS cells were also observed after 17alpha-methyltestosterone administration in males and 17 β-estradiol administrations in females. A positive correlation was observed between plasma STC levels, gonadosomatic index (GSI) and the sex steroids in both sexes, suggesting that STC has a role in the processes involved in gonadal development. In addition females showed remarkable changes in plasma calcium level during gonadal cycle while no such change for males were observed. In females the plasma calcium level estimated during different phases of reproductive cycle indicates positive correlation between plasma level of calcium and gonad growth. Thus hyperactivity of CS cells was noted in both male and female fishes during gonadal cycle along with the differences in the activity of STC as well. In female it may act as hypocalcemic factor and bring the level of calcium to normal which increases during preparatory and pre spawning phases to fulfill the increased demand of calcium for vitellogenesis. However data of male fishes indicated that plasma STC concentration varied widely during gonadal cycle but showed no consistent relationship to plasma calcium level. © 2014 Verma, Alim.
Manigandan P.K.,Ranchi University |
Chandar Shekar B.,Bharathiar University
Journal of Environmental Radioactivity | Year: 2014
Transfer of the naturally occurring radionuclides 238U, 232Th, and 40K, and the fallout radionuclide 210Po to different wild plant species in the rainforest of Western Ghats was analyzed. A number of physiologically different plants from the top storey and understorey, such as shrubs and epiphytes, were compared. The concentrations of these radionuclides in the plants and soil were measured using a gamma ray spectrometer and an alpha counter, and were found to vary widely within plants and between species. The soil-plant ratios also varied between species while Elaeocarpus oblongus and epiphytic plants exhibited preferential uptake of these radionuclides. As a result, the dust particles trapped in the root systems of epiphytes could be used as bioindicators of fallout radionuclides in the Western Ghats. •Predominant plants species of the region were selected for analysis.•CR Model was employed to these plants spices.•Two plants were indicated preferential uptake of these radionuclides.•Bioindicator was identified in the Western Ghats Environment. © 2014 Elsevier Ltd.