Sambalpur University is located at Sambalpur, India, in the Indian state of Odisha. Popularly known as Jyoti Vihar. It offers courses at the undergraduate and post-graduate levels. Governor of Odisha is the Chancellor of the university. The campus is located 15 km away from Sambalpur in Burla. Wikipedia.
Sahu S.R.,National Institute of Oceanography of India |
Panda K.C.,Sambalpur University
Scientometrics | Year: 2014
In the last few decades, multi-authored articles have increased in different disciplines with increasing instances of authorship abuse although multi-authorship is not always due to undeserving authorship (McDonald et al. in Mayo Clin Proc 85(10):920-927, 2010). It may be necessitated by interdisciplinary research, the evolution of a discipline, or the intention of quality improvement. This article studies the relationship between the authorship and the quality of articles (publications in better impact factor journals or core journals) in the field of Oceanography. The result shows ~75 % increase in the number of authors per article from 1990 to 2009 in the discipline. The increase in authorship correlates not only with the percentage of articles in core journals but also with the mean impact factor (IF) of journals (where the articles were published). The ANOVA study shows that though multi-authorship has no influence on the preference to publish in core journals during the 1990s or 2000s, it does have a significant influence on the preference to publish in high IF journals in both the decades. So these findings establish that in the field of Oceanography, the increase in collaboration would have resulted in more publications in core journals (without any influence of authorship increase) and in better impact factor journals (due to the influence of authorship increase). © 2013 Akadémiai Kiadó, Budapest, Hungary.
Pradhan D.K.,National Institute of Technology Rourkela |
Behera B.,Sambalpur University |
Das P.R.,Soa University
Journal of Materials Science: Materials in Electronics | Year: 2012
A polycrystalline ceramic with a new type of complex tungsten-bronze type structure, having a general formula K 2Ba 2Nd 2Ti 4Nb 4W 2O 30 has been prepared using a high temperature solid-state reaction route after optimizing the calcinations conditions on the basis of thermal analysis results. The material has been characterized by different experimental techniques. The formation of the compound has been confirmed using X-ray diffraction analysis. Dielectric properties (ε r and tanδ) of the compound as a function of temperature at different frequencies have been carried out. Temperature dependence of dielectric constant indicates the presence of ferroelectric phase transition well above the room temperature. Complex impedance spectroscopic analysis has been carried out as a function of frequency at different temperatures to establish some correlation between the microstructure and electrical properties of the material. The nature of frequency dependence of ac conductivity obeys the Jonscher's power law. The dc conductivity calculated from the ac conductivity spectrum shows the negative temperature coefficient of resistance behavior like a semiconductor. © Springer Science+Business Media, LLC 2011.
Majumdar P.,Sambalpur University |
Majumdar P.,Dalian University of Technology |
Pati A.,Sambalpur University |
Pati A.,KIIT University |
And 3 more authors.
Chemical Reviews | Year: 2014
A study was conducted to provide practical guidance for synthetic chemists on the synthesis of oxygen-, nitrogen-, and sulfur-containing heterocyclic rings. Reaction of benz(g)indole dicarboxylate 5 with hydrazine hydrate in refluxing ethanol and a catalytic amount of pyridine chemoselectively produced only 63% of benz(g)indole monocarbohydrazide 7 instead of the expected dicarbohydrazide 6 wherein the C3carboethoxy group remained unchanged toward nucleophile hydrazine hydrate. The resistance of the heterocycles formed, starting with five- and six-membered rings. These systematic collections in the study expanded the ample possibilities to the synthetic methods accessed by the chemistry for synthesis of heterocyclic compounds and would be useful to pick the route for further research.
Sahu D.,CSIR - Institute of Minerals And Materials Technology |
Acharya B.S.,CSIR - Institute of Minerals And Materials Technology |
Panda A.K.,Sambalpur University
Ultrasonics Sonochemistry | Year: 2011
ZnO powder doped with 0.84 at wt.% of silver has been synthesized through continuous and pulsed mode sonication method. The particle size was found to be 57(±1). nm and 44(±1). nm for continuous and pulsed mode powder, respectively. Contraction along '. c' axis has been observed for Ag doped powders. The surface area measured for pulsed mode powder was found to be twice that of continuous mode powder. Photoluminescence spectra of pulsed mode ZnO:Ag powder show new emission band at 608 nm. This has been attributed to silver atoms sitting on the surface of ZnO nano rods. Structure of the nano rods observed in both the samples was found to be different and this has been attributed to the presence of silver on the surface of the nano rods. The structural evolution during the process of sonication has been explained in the light of Ag ion reduction in the local high concentration region during ultrasonication. © 2010 Elsevier B.V.
Khandpekar M.M.,Material Research Laboratory |
Pati S.P.,Sambalpur University
Optics Communications | Year: 2010
Well defined transparent single crystals of α-glycine-sulpho-nitrate (GLSN) were obtained by slow evaporation of the solvent at room temperature. The new GLSN system crystallises in to orthorhombic symmetry with an indicative change in cell parameters depending upon the composition. CHNS, EDAX and proton NMR and carbon NMR analysis confirm the chemical units in the crystal. Comparative analysis of FTIR and laser Raman Spectra confirm the functional groups in the molecule. The TGA and DTA studies show presence of a transition anomaly at 413 K supported by resistivity and dielectric measurements. UV studies indicate wide transparency window with SWG conversion efficiency of 0.029 times of that of KDP material suggesting its use in optoelectronic devices. The crystal acts as a light sensor and exhibits light dependent nature indicative of conduction due of hydrogen ions with formation of space charge. The GSN crystal acts as a stable dielectric with a safe operating range of 300 volts/cm. © 2010 Elsevier B.V. All rights reserved.
Samal A.K.,Sambalpur University |
Mall R.,Indian Institute of Technology Kharagpur |
Tripathy C.,Veer Surendra Sai University of Technology
Swarm and Evolutionary Computation | Year: 2014
Conventional methods for fault-tolerant scheduling of real-time tasks based on traditional heuristic approach offer poor performance and inefficient system utilization. The primary-backup (PB) approach is often used as a fault-tolerant scheduling technique to guarantee RT tasks to meet their deadline despite the presence of fault. We propose a novel scheduling algorithm using optimization approach based on genetic algorithm (GA) hybridized with knowledge from the real-time task scheduling domain for providing fault-tolerance (FT) in multiprocessor environment. Exhaustive simulation reveals that the new GA based primary-backup fault-tolerant scheduling (PBFTS) approach outperforms other fault-tolerant scheduling schemes in terms of system utilization and efficiency. © 2013 Elsevier B.V.
Dash U.,Sambalpur University |
Misra P.K.,Sambalpur University
Journal of Colloid and Interface Science | Year: 2011
The effects of nonionic surfactants OP-10 and OP-30 (polyoxyethylated octyl phenols with 10 and 30 oxyethylene groups, respectively) in surfactant mixtures with ionic surfactants hexadecyltrimethylammonium bromide (CTAB) and sodium dodecyl sulphate (SDS) have been investigated by a conductometric method in conjunction with fluorescence, surface tension, zeta potential, and DLS measurements. The interactions are found to be antagonistic in nature for each of the systems; i.e., micellization of CTAB as well as SDS is hindered on addition of the nonionic surfactants. The antagonism is found to be more prominent in the presence of OP-10 compared to that of OP-30. Two types of mechanistic paths, path A operating below the critical micellar concentration and path B operating beyond the critical micellar concentration of nonionic surfactants, have been suggested. In path A, the retardation in micellization has been attributed to a decrease in monomeric concentration of the ionic surfactants from solution as a result of the formation of a hydrophobic complex between nonionic and ionic surfactants. In path B, the decrease in monomer concentration is due to the solubilization of the ionic surfactant in micelles of the nonionic surfactants in a 1:1 stoichiometric ratio. A theoretical treatment to the interaction in each ionic-nonionic pair yields a positive value of the interaction parameter supporting the concept of antagonism. The formation of the hydrophobic complex is supported by fluorescence and surface tension measurements. A schematic representation of the stabilization of these hydrophobic complexes has been suggested. The association of ionic surfactants by nonionic micelles is suggested by zeta potential and DLS studies. © 2011 Elsevier Inc.
Patel A.,Sambalpur University
Environmental Earth Sciences | Year: 2012
Mountain erosion mapping is one of the important aspects for monitoring environmental degradation. Global climate change coupled with human activities is eroding the mountain regions of the world at an alarming rate. The various types of erosion can be classified as water erosion, aeolian erosion, glaciered erosion, gravity erosion and man-made erosion. Tectonic activity also plays a major role towards mountain erosion. Soil erosion along with debris flow and rock falling not only causes loss of human life and property, but also affects the climatic condition of the mountain regions. Mountain erosion mitigation and protection methods include wire mesh fencing with inclusion of brush layers and brush mats on fascines, constructing check dams and slope benches and application of bioengineering works such as plantation and vegetation growth. This study consists of the global scenario with some of the state-of-the-art methods for mitigation and mappings of mountain erosion. The erosion in mountainous regions can be controlled with the help of suitable vegetation and plant growth, with installation of special bioengineered materials. However, public awareness is also considered as an important factor. Moreover, it is found that mapping the rate of erosion greatly helps to make proper action plan against the erosion process. © 2012 Springer-Verlag.
Dash S.,North Orissa University |
Swain S.K.,Sambalpur University |
Swain S.K.,North Orissa University
Carbohydrate Polymers | Year: 2013
Starch/silicon carbide (starch/SiC) bionanocomposites were synthesized by solution method using different wt% of silicon carbide with starch matrix. The interaction between starch and silicon carbide was studied by Fourier transform infrared (FTIR) spectroscopy. The structure of the bionanocomposites was investigated by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). Thermal property of starch/SiC bionanocomposites was measured and a significant enhancement of thermal resistance was noticed. The oxygen barrier property of the composites was studied and a substantial reduction in permeability was observed as compared to the virgin starch. The reduction of oxygen permeability with enhancement of thermal stability of prepared bionanocomposites may enable the materials suitable for thermal resistant packaging and adhesive applications. © 2013 Elsevier Ltd. All rights reserved.
Ojha D.P.,Sambalpur University
Molecular Crystals and Liquid Crystals | Year: 2014
The interesting property of strong polar group nematogens, 4′-n-alkyl-4-cyanobiphenyl (nCB) with pentyl (5CB), and heptyl (7CB), groups that are of commercial and application interest has been studied with respect to the translational and orientational motions. The atomic net charge and dipole moment components at each atomic center have been evaluated using the complete neglect differential overlap (CNDO/2) method. The modified Rayleigh-Schrodinger Perturbation theory with the multicentered-multipole expansion method has been employed to evaluate the long-range interactions, and a "6-exp." potential function has been assumed for the short-range interactions. The minimum energy configurations obtained during the different modes of interactions have been taken as input to calculate the configurational probability using the Maxwell-Boltzmann formula in nonpolar organic solvents, that is, carbon tetrachloride (CCl4), and chloroform (CHCl 3) at room temperature 300 K. It has been observed that the molecules show the remarkable property in the organic solvents. The interaction energies of dimer complexes have been taken into consideration in order to investigate the most energetically stable configuration. An attempt has been made to develop a new and interesting model for nematogens at molecular level. 2014 Copyright © 2014 Taylor & Francis Group, LLC.