oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2018 ( 1 )

2017 ( 23 )

2016 ( 28 )

2015 ( 273 )

自定义范围…

匹配条件: “Parimal Chandra Ray” ,找到相关结果约5414条。
列表显示的所有文章,均可免费获取
第1页/共5414条
每页显示
Impact of road widening on wildlife in Namdapha National Park, Arunachal Pradesh, India: a conservation issue
Murali Krishna C,Awadhesh Kumar,Parimal Chandra Ray,Kuladip Sarma
Asian Journal of Conservation Biology , 2013,
Abstract:
A Technique to Choose the Proper Vector Space Models of Semantics in Case of Automatic Text Categorization
Sukanya Ray,Nidhi Chandra
International Journal of Modern Education and Computer Science , 2012,
Abstract: vides a proper solution to this limitation. There are broadly three main categories of Vector Space Model: term-document, word-content and pair-pattern matrices. The main aim of this paper is to discuss broadly the three main categories of VSM for semantic analysis of texts and make proper selection for automatic categorizing. The scenario taken up here is categorization of research papers for organizing a national or an international conference based on the proposed methodology. Computers do not understand human language and this makes it difficult when human wants the computer to do some specific task like categorization according to human need. Vector Space Model (VSM) for semantic analysis of texts and make proper selection of one of the three main categories for automatic categorizing of research papers for organizing a national or an international conference based on the proposed methodology.
Domain Based Ontology and Automated Text Categorization Based on Improved Term Frequency – Inverse Document Frequency
Sukanya Ray,Nidhi Chandra
International Journal of Modern Education and Computer Science , 2012,
Abstract: In recent years there has been a massive growth in textual information in textual information especially in the internet. People now tend to read more e-books than hard copies of the books. While searching for some topic especially some new topic in the internet it will be easier if someone knows the pre-requisites and post- requisites of that topic. It will be easier for someone searching a new topic. Often the topics are found without any proper title and it becomes difficult later on to find which document was for which topic. A text categorization method can provide solution to this problem. In this paper domain based ontology is created so that users can relate to different topics of a domain and an automated text categorization technique is proposed that will categorize the uncategorized documents. The proposed idea is based on Term Frequency – Inverse Document Frequency (tf -idf) method and a dependency graph is also provided in the domain based ontology so that the users can visualize the relations among the terms.
Osmolyte modulated enhanced rice leaf catalase activity under salt-stress  [PDF]
Sushmita Sahu, Priyanka Das, Mamata Ray, Surendra Chandra Sabat
Advances in Bioscience and Biotechnology (ABB) , 2010, DOI: 10.4236/abb.2010.11006
Abstract: Change in catalase activity was examined in leaves of rice plant exposed to salinity. Depending on the method of preparation of crude protein extract from leaf and the constituents of the assay medium, a significant difference in enzyme activity was recorded. Inclusion of sorbitol or mannitol or sucrose in the extraction and enzyme assay medium enhanced the enzyme activity in salt-stressed samples by nearly 1.5-1.8 fold, compared to the activity found in un- stressed plants, which otherwise showed a 50% declined activity in leaf extract prepared in buffer solution and assayed in a medium depleted of these sugars. In view of the accumulation of osmolytes under saline condition, these observations suggest that the catalase activity is modulated by the osmolytes and maintains a high rate of hydrogen peroxide scavenging property in vivo and serves as the major antioxidant enzyme to scavenge the salt-induced formation of peroxide. Therefore, the salt-stress induced appearance of low activity of the enzyme under normal buffer extraction and assay conditions, as reported in literature may represent an apparent than for its real in vivo activity.
Combined Effects of Centrifugal and Coriolis Instability of the Flow through a Rotating Curved Duct with Rectangular Cross Section  [PDF]
Rabindra Nath Mondal, Samir Chandra Ray, Shinichiro Yanase
Open Journal of Fluid Dynamics (OJFD) , 2014, DOI: 10.4236/ojfd.2014.41001
Abstract: Combined effects of centrifugal and coriolis instability of the flow through a rotating curved duct with rectangular cross section have been studied numerically by using a spectral method, and covering a wide range of the Taylor number  for a constant Dean number. The rotation of the duct about the center of curvature is imposed in the positive direction, and the effects of rotation (Coriolis force) on the flow characteristics are investigated. As a result, multiple branches of asymmetric steady solutions with two-, three-and multi-vortex solutions are obtained. To investigate the non-linear behavior of the unsteady solutions, time evolution calculations as well as power spectrum of the unsteady solutions are performed, and it is found that the unsteady flow undergoes through various flow instabilities in the scenario “chaotic → multi-periodic → periodic → steady-state”, if Tr is increased in the positive direction. The present results show the characteristics of both the secondary flow and axial flow distribution in the flow.
Implication of low temperature and sonication on electrocrystallization mechanism of Cu thin films: a kinetics and structural correlation
Mallik, Archana;Ray, Bankim Chandra;
Materials Research , 2013, DOI: 10.1590/S1516-14392013005000009
Abstract: the effect of an ultrasonic environment during electrodeposition of copper on graphite at various electrolyte temperatures of 25, 20, 15, 10 and 5 °c is reported in this investigation. resulting cu deposits formed by potentiostatic deposition were characterized by electrochemical methods, scanning electron microscopy and atomic force microscopy. it was found that in presence of ultrasound the deposition kinetics was mainly dominated by the charge transfer. copper nucleated according to 3d instantaneous mechanisms for all temperature ranges. the extent of nucleation was found to be increased at low temperatures. diffusion coefficients and nuclei population density were calculated for each temperature range. sonicated deposits with good surface coverage were found to consist of spherical copper agglomerates of nanosized particles.
Cadmium Telluride (CdTe) Thin Film for Photovoltaic Applications
Sekhar Chandra Ray,Kaushik Mallick
International Journal of Chemical Engineering and Applications , 2013, DOI: 10.7763/ijcea.2013.v4.290
Abstract: Cadmium telluride (CdTe) thin films are prepared by the dip-coating deposition technique under atmospheric pressure at different temperature. The optical band gap obtained within the range 1.63-1.60 eV. Crystallite sizes are obtained from XRD that are dependent on composition (Cd/Te) and baking temperatures. Raman spectra confirms the presence of transverse (TO) and longitudinal (LO) optical phonons in the CdTe structure. Films are good photoconductive in nature and could be used in photovoltaic applications.
Endogenous modulators in the regulation of ion transporting enzymes: structure, function, interactions, recent advancements and future perspectives  [PDF]
Parimal C. Sen
Advances in Biological Chemistry (ABC) , 2011, DOI: 10.4236/abc.2011.13010
Abstract: A prerequisite for life is the ability to uphold electro-chemical imbalance across biomembranes. Ion trans- porting enzymes, known as specific pumps, are re-sponsible for the transport of various ions across cell membranes to sustain the same. In all eukaryotes, the plasma membrane potential and secondary transport systems are maintained by the activity of P-type ion transporting enzymes, commonly known as ATPase membrane pumps. Malfunction of pumps leads to various cell disorders and subsequently diseases like cardiac problems, renal malfunctionings, diabetes, cataract, even cancer. Activities/functions of these pumps are regulated either by exogenous agents or by endogenous substances like proteins, peptides, hormones, etc., which are collectively known as mo- dulators. Some of these endogenous modulators may be useful for developing drugs depending on the na-ture of regulation. For more than last two decades, researchers across the globe are exploring the me- chanism of action of different endogenous modulators on these ion transporting enzymes with the aim of developing target-specific drugs. In this review, we have discussed recent advances in our understanding of ATPase pumps, e.g., Ca2+-, Na+, K+-, Ca2+, Mg2+-, H+, K+-ATPases, with the emphasis on their functional regulation by a number of endogenous modulators, and the implications of development of some of these modulators as potential drugs.
Effort Estimation for Design Activity in Power Plant Equipments  [PDF]
Parimal Kumar Giri
Journal of Software Engineering and Applications (JSEA) , 2012, DOI: 10.4236/jsea.2012.512115
Abstract:

This Software for Design Activity in Power Plants Equipments helps the Power Plant engineers and managers to manage the development and design activities of equipments in the field of power plants. This paper is basically concerned with the computerization of the design activity of Condenser, vital equipment in Heat Exchanger Unit (HEU) of Thermal Power Plant required for condensing the steam and for further reclaimable purposes to achieve economy. This software will also provide facilities to maintain user profile and the respective work details. The study use a developed model which estimates software effort by studying and analyzing small and medium scale application software.

Dissipative tunneling in presence of classical chaos in a mixed quantum-classical system
Bidhan Chandra Bag,Bikash Chandra Gupta,Debshankar Ray
Physics , 1999, DOI: 10.1016/S0375-9601(99)00174-7
Abstract: We consider the tunneling of a wave packet through a potential barrier which is coupled to a nonintegrable classical system and study the interplay of classical chaos and dissipation in the tunneling dynamics. We show that chaos-assisted tunneling is further enhanced by dissipation, while tunneling is suppressed by dissipation when the classical subsystem is regular.
第1页/共5414条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.