Brahmapur, India
Brahmapur, India

Berhampur University is a NAAC- B accredited university in Brahmapur, Odisha, India. It is one of the oldest and major universities of Odisha, the others being Utkal University at Bhubaneswar and Sambalpur University at Sambalpur. Wikipedia.

Time filter

Source Type

Victory Devi C.,Manipur University | Phaomei G.,Berhampur University | Rajmuhon Singh N.,Manipur University
Journal of Alloys and Compounds | Year: 2014

YVO4:Dy3+, Bi3+ phosphors were prepared successfully by co-precipitation method using ethylene glycol as a capping agent as well as reaction medium at a relatively low temperature of 150 C. XRD patterns of all samples are well crystallized to a pure tetragonal phase of YVO4. The unit cell volume increases linearly with the Bi 3+ ion concentrations suggesting the quantitative incorporation of Bi3+ ions in lattice sites of Y3+ in YVO4 matrix. On introduction of Bi3+ ions, the VO4 3- excitation band shifts to longer wavelengths. Energy transfer from V 5+-Bi3+ CT state to Dy3+ was observed, giving rise to the characteristic visible emissions from Dy3+. The luminous intensity of the electric dipole transition as well as magnetic dipole transitions of Dy3+are enhanced significantly on co-doping of Bi 3+ ions. The optimum concentration of Dy3+ for highest luminescence is found to be 1 at.% Bi3+ and the luminescence intensity increases on annealing samples at 500 C. Furthermore, the emission colors of YVO4:5Dy3+ can be tuned from greenish blue to near white by changing the excitation wavelength and then to yellowish white on co-doping Bi3+ ions, making the phosphors a great potential for applications in fluorescent lamps and field emission displays (FEDs). © 2013 Elsevier B.V. All rights reserved.

Panigrahi J.K.,Berhampur University | Amirapu S.,Ramboll
Environmental Impact Assessment Review | Year: 2012

Environmental impact assessment (EIA) was first introduced in India based on the Environmental Protection Act (EPA), 1986. But formally it came in to effect, when Ministry of Environment and Forest (MoEF) has passed a major legislative measure under EPA in January 1994 for Environmental Clearance (EC) known as EIA Notification, 1994. Subsequently, EIA processes have been strengthened by MoEF by a series of amendments. The current practice is adhering to EIA Notification, 2006 and its amendments. The pieces of evidence collected and analysis in the present assessment suggest that, despite a sound legislative, administrative and procedural set-up EIA has not yet evolved satisfactorily in India. An appraisal of the EIA system against systematic evaluation criteria, based on discussions with various stakeholders, EIA expert committee members, approval authorities, project proponents, NGOs and consulting professionals, reveals various drawbacks of the EIA system. These mainly include; inadequate capacity of EIA approval authorities, deficiencies in screening and scoping, poor quality EIA reports, inadequate public participation and weak monitoring. Overall, EIA is used presently as a project justification tool rather than as a project planning tool to contribute to achieving sustainable development. While shortcomings are challenging, Government of India is showing a high degree of commitment. The EIA system in the country is undergoing progressive refinements by steadily removing the constraints. The paper identifies opportunities for taking advantage of the current circumstances for strengthening the EIA process. © 2012 Elsevier Inc.

Mohan Murali Achary V.,Berhampur University | Patnaik A.R.,Berhampur University | Panda B.B.,Berhampur University
Ecotoxicology and Environmental Safety | Year: 2012

Cellular responses to Al-stress in Hordeum vulgare seedling bioassay were evaluated with an objective to identify the possible biomarkers in leaf tissue that would be best suited to biomonitor aluminum (Al) in the environment. Germinating seeds were treated with different concentrations of AlCl 3 at pH 4.5 for 12h. Al-uptake and accumulation in root and leaf, generation of reactive oxygen species (ROS: O 2 -, H 2O 2 and OH), cell death, activity of antioxidant enzymes: catalase, superoxide dismutase, guaiacol peroxidase, ascorbate peroxidase, lipid peroxidation, protein oxidation, DNase activity and DNA damage were measured in leaf tissue of the seedlings on day 6 after treatment. The above parameters assessed in leaf tissue that followed a dose-response exhibited significant correlation with concentration of Al 3+ in experimental solution as well as in root tissue. The findings underscored the sensitivity as well as potential of Hordeum vulgare seedling bioassay for biomonitoring of Al in the ambient environment. © 2011 Elsevier Inc.

Knowledge of seismic earth pressure against rigid retaining wall is very important. Mononobe- Okabe method is commonly used, which considers pseudo-static approach. In this paper, the pseudodynamic method is used to compute the distribution of seismic earth pressure on a rigid cantilever retaining wall supporting dry cohesionless backfill. Planar rupture surface is considered in the analysis. Effect of various parameters like wall friction angle, soil friction angle, shear wave velocity, primary wave velocity, horizontal and vertical seismic accelerations on seismic earth pressure have been studied. Results are presented in terms of tabular and graphical non-dimensional form.

Dash K.,Gopalpur College | Tripathi G.S.,Berhampur University
Journal of Magnetism and Magnetic Materials | Year: 2012

We derive a theory of magnetization for the diluted magnetic semiconductor, p-type Sn 1-xGd xTe including the contributions from Gd 3 local moments, carrier-local moment hybridization and lattice diamagnetism as a function of temperature and magnetic field. The local moment contribution M local is a sum of three contributions: M local=M sM pM t, where M s is the dominant single-spin contribution, and M p and M t are the contributions from clusters of two- and three-spins, respectively. We have also calculated the contribution due to spin-polarized holes for carrier densities of order 10 20 cm -3, using a k⇀·π → model, where π→ is the momentum operator in the presence of the spinorbit interaction and k→ is the hole wave vector. This contribution includes the carrier-local moment hybridization. We have also included a diamagnetic lattice contribution, which comes from inter-band orbital and spinorbit contributions. In this contribution, the symbol k→ is used for the electronic wave vector. The local moment contribution is dominant and primarily comes from the isolated spins. However, the two- and three-spin contributions increase with increase in the magnetic impurity concentration. The magnitude of the holespin polarization is about two orders less than the local moment contribution even at field strength of 25 T. However, the magnetization due to carrier spin-density has intrinsic importance due to its role in possible spintronics applications. The lattice diamagnetism shows considerable anisotropy. The total magnetization is calculated from all the three contributions M local, M c (due to carriers, here holes) and M dia. We have compared our results with experiment wherever available and the agreement is fairly good. © 2011 Elsevier B.V.

Murali Achary V.M.,Berhampur University | Panda B.B.,Berhampur University
Mutagenesis | Year: 2010

Experiments employing growing root cells of Allium cepa were conducted with a view to elucidate the role of reactive oxygen intermediates (ROI) in aluminium (Al)-induced DNA damage, cell death and adaptive response to genotoxic challenge imposed by ethyl methanesulphonate (EMS) or methyl mercuric chloride (MMCl). In a first set of experiments, root cells in planta were treated with Al at high concentrations (200-800 μM) for 3 h without or with pre-treatments of dihydroxybenzene disulphonic acid (Tiron) and dimethylthiourea (DMTU) for 2 h that trap O2 and hydrogen peroxide (H2O2), respectively. At the end of treatments, generation of O2 and H2O2, cell death and DNA damage were determined. In a second set of experiments, root cells in planta were conditioned by Al at low concentrations (5 or 10 μM) for 2 h and after a 2 h intertreatment interval challenged by MMCl or EMS for 3 h without or with a pre-treatment of Tiron or DMTU. Conditioning treatments, in addition, included two oxidative agents viz rose bengal and H2O2 for comparison. Following treatments, root cells in planta were allowed to recover in tap water. Genotoxicity and DNA damage were evaluated by micronucleus (MN), chromosome aberration (CA) or spindle aberration (SA) and comet assays at different hours (0-30 h) of recovery. The results demonstrated that whereas Al at high concentrations induced DNA damage and cell death, in low concentrations induced adaptive response conferring genomic protection from genotoxic challenge imposed by MMCl, EMS and Al. Pre-treatments of Tiron and DMTU prevented Al-induced DNA damage, cell death, as well as genotoxic adaptation to MMCl and EMS, significantly. The findings underscored the biphasic (hormetic) mode of action of Al that at high doses induced DNA damage and at low non-toxic doses conferred genomic protection, both of which were mediated through ROI but perhaps involving different networks.

Pattnaik S.,Taratarini College | Nayak R.C.,Berhampur University
International Journal of Modern Physics E | Year: 2014

We obtain here a new relation for the reduced electric quadrupole transition probability B(E2) of a given nucleus in terms of its derivatives with respect to neutron and proton numbers based on a similar local energy relation in the Infinite Nuclear Matter (INM) model of atomic nuclei, which is essentially built on the foundation of the Hugenholtz-Van Hove (HVH) theorem of many-body theory. Obviously, such a relation in the form of a differential equation is expected to be more powerful than the usual algebraic difference equations. Although the relation for B(E2) has been perceived simply on the basis of a corresponding differential equation for the local energy in the INM model, its theoretical foundation otherwise has been clearly demonstrated. We further exploit the differential equation in using the very definitions of the derivatives to obtain two different recursion relations for B(E2), connecting in each case three neighboring even-even nuclei from lower to higher mass numbers and vice versa. We demonstrate their numerical validity using available data throughout the nuclear chart and also explore their possible utility in predicting B(E2) values. © 2014 World Scientific Publishing Company.

Nayak R.C.,Berhampur University | Satpathy L.,Institute of Physics, Bhubaneswar
Atomic Data and Nuclear Data Tables | Year: 2012

We present here the mass excesses, binding energies, one- and two-neutron, one- and two-proton and α-particle separation energies of 6727 nuclei in the ranges 4≤Z≤120 and 8≤A≤303 calculated in the infinite nuclear matter model. Compared to our predictions of 1999 mass table, the present ones are obtained using larger data base of 2003 mass table of Wapstra and Audi and resorting to higher accuracy in the solutions of the η-differential equations of the INM model. The local energy η's supposed to carry signature of the characteristic properties of nuclei are found to possess the predictive capability. In fact η-systematics reveal new magic numbers in the drip-line regions giving rise to new islands of stability supported by relativistic mean field theoretic calculations. This is a manifestation of a new phenomenon where shell-effect overcomes the instability due to repulsive components of the nucleon-nucleon force broadening the stability peninsula. The two-neutron separation energy-systematics derived from the present mass predictions reveal a general new feature for the existence of islands of inversion in the exotic neutron-rich regions of nuclear landscape, apart from supporting the presently known islands around 31Na and 62Ti. The five global parameters representing the properties of infinite nuclear matter, the surface, the Coulomb and the pairing terms are retained as per our 1999 mass table. The root-mean-square deviation of the present mass-fit to 2198 known masses is 342 keV, while the mean deviation is 1.3 keV, reminiscent of no left-over systematic effects. This is a substantive improvement over our 1999 mass table having rms deviation of 401 keV and mean deviation of 9 keV for 1884 data nuclei. © 2012 Elsevier Inc.

Panda A.,Berhampur University | Misra M.K.,Berhampur University
Indian Journal of Traditional Knowledge | Year: 2011

Results of an ethnomedicinal survey of wetlands of Eastern Ghat region of Orissa are presented. Data and specimens were collected during 2005-2008 of field study. Field study consisted of plant collection and interview with the local traditional healers. The result revealed that 48 wetland plants under 40 genera and 23 families were under use by the local inhabitants against 47 different ailments. The communication reports for the first time 29 taxa with new medicinal uses. The survival of these native wetland species is threatened and hence attention on the wetland resources especially those having economic value is warranted.

Mohanty R.,Keshav Memorial Institute of Technology | Ravi V.,Banking Technology | Patra M.R.,Berhampur University
Applied Soft Computing Journal | Year: 2013

In this paper, we propose novel recurrent architectures for Genetic Programming (GP) and Group Method of Data Handling (GMDH) to predict software reliability. The effectiveness of the models is compared with that of well-known machine learning techniques viz. Multiple Linear Regression (MLR), Multivariate Adaptive Regression Splines (MARS), Backpropagation Neural Network (BPNN), Counter Propagation Neural Network (CPNN), Dynamic Evolving Neuro-Fuzzy Inference System (DENFIS), TreeNet, GMDH and GP on three datasets taken from literature. Further, we extended our research by developing GP and GMDH based ensemble models to predict software reliability. In the ensemble models, we considered GP and GMDH as constituent models and chose GP, GMDH, BPNN and Average as arbitrators. The results obtained from our experiments indicate that the new recurrent architecture for GP and the ensemble based on GP outperformed all other techniques. © 2012 Elsevier B.V.

Loading Berhampur University collaborators
Loading Berhampur University collaborators