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Lal Bahadur Nagar, India

The Central University of South Bihar is one of the sixteen newly established Central Universities by the Government of India under the Central Universities Act, 2009 . The university is located at the premises of Birla Institute of Technology, Patna . The university is likely to be relocated to Panchanpur, approximately 10 km from Gaya on Defence land to be transferred soon. Keeping in view of the permanent location of the university at Gaya, it has been decided to launch new academic programmes at Gaya. It operates from a temporary campus on the grounds of Birla Institute of Technology, Patna. The university will now have its own campus in Gaya. On 28 February 2014, Lok Sabha Speaker Meira Kumar laid the foundation stone of the Central University of South Bihar at Gaya. It will be spread in 300 acre campus. After establishment of Mahatama Gandhi Central University in Motihari after the Central Universities Act 2014 is passed in Rajya Sabha, the university will be renamed to Central University of South Bihar. Wikipedia.

Ranjan R.K.,Jawaharlal Nehru University | Ranjan R.K.,Central University of Bihar | Routh J.,IISER Kolkata | Ramanathan A.L.,Jawaharlal Nehru University | Klump J.V.,University of Wisconsin - Milwaukee
Marine Chemistry | Year: 2011

In order to evaluate the sources and fate of organic matter (OM) in the Pichavaram mangrove-estuarine ecosystem, Corg, Ntot, C/Natm, and stable isotopes (δ13Corg and δ15Norg) of five 210Pb dated sediment cores were investigated. Core A was collected from the Vellar Estuary, cores B, C, and D from mangrove forests, and core E was from the Coleroon Estuary. In mangrove sediments, Corg, Ntot, and C/Natm concentration varied from 1.2±0.52%, 0.08±0.03%, and 16.6±4.1%, respectively. In the estuaries, Corg, Ntot, and C/Natm varied from 0.37±0.19%, 0.03±0.01%, and 12.3±2.9%, respectively. In mangrove forests the δ13Corg and δ15Norg values varied from -24.3±1.8‰ and 4.2±0.86‰, whereas in estuaries these values were -23.2±1.6‰ and 5.1±1.3‰, respectively. The variation represents variable inputs of marine and terrestrial OM in these area, OM degradation, replacement of native vegetation due to increasing salinity, and early diagenetic changes. Some of these changes could be attributed to anthropogenic activities that have been happening in the Pichavaram complex over the last few decades. OM once deposited in the sediments is rapidly decomposed or remineralized in both mangrove and estuarine sites. The rate of Corg burial is more in mangrove forests than estuaries. Early diagenetic changes are modeled in the cores based on C/N stoichiometry. This was most applicable in mangrove sediments (core C) where ~56% C was remineralized representing a first order diagenetic model. © 2011 Elsevier B.V.

Rana A.,Lund University | Uvo C.B.,Lund University | Bengtsson L.,Lund University | Sarthi P.P.,Central University of Bihar
Climate Dynamics | Year: 2012

Urbanisation has burdened cities with many problems associated with growth and the physical environment. Some of the urban locations in India are becoming increasingly vulnerable to natural hazards related to precipitation and flooding. Thus it becomes increasingly important to study the characteristics of these events and their physical explanation. This work studies rainfall trends in Delhi and Mumbai, the two biggest Metropolitan cities of Republic of India, during the period from 1951 to 2004. Precipitation data was studied on basis of months, seasons and years, and the total period divided in the two different time periods of 1951-1980 and 1981-2004 for detailed analysis. Long-term trends in rainfall were determined by Man-Kendall rank statistics and linear regression. Further this study seeks for an explanation for precipitation trends during monsoon period by different global climate phenomena. Principal component analysis and Singular value decomposition were used to find relation between southwest monsoon precipitation and global climatic phenomena using climatic indices. Most of the rainfall at both the stations was found out to be taking place in Southwest monsoon season. The analysis revealed great degree of variability in precipitation at both stations. There is insignificant decrease in long term southwest monsoon rainfall over Delhi and slight significant decreasing trends for long term southwest monsoon rainfall in Mumbai. Decrease in average maximum rainfall in a day was also indicated by statistical analysis for both stations. Southwest monsoon precipitation in Delhi was found directly related to Scandinavian Pattern and East Atlantic/West Russia and inversely related to Pacific Decadal Oscillation, whereas precipitation in Mumbai was found inversely related to Indian ocean dipole, El Niño- Southern Oscillation and East Atlantic Pattern. © 2011 Springer-Verlag.

Singh R.K.,Central University of Bihar | Singh A.K.,Banaras Hindu University
Acta Mechanica Sinica/Lixue Xuebao | Year: 2012

In the present paper, we have considered the steady fully developed laminar natural convective flow in open ended vertical concentric annuli in the presence of a radial magnetic field. The induced magnetic field produced by the motion of an electrically conducting fluid is taken into account. The transport equations concerned with the considered model are first recast in the non-dimensional form and then unified analytical solutions for the velocity, induced magnetic field and temperature field are obtained for the cases of isothermal and constant heat flux on the inner cylinder of concentric annuli. The effects of the various physical parameters appearing into the model are demonstrated through graphs and tables. It is found that the magnitude of maximum value of the fluid velocity as well as induced magnetic field is greater in the case of isothermal condition compared with the constant heat flux case when the gap between the cylinders is less or equal to 1.70 times the radius of inner cylinder, while reverse trend occurs when the gap between the cylinders is greater than 1.71 times the radius of inner cylinder. These fields are almost the same when the gap between the cylinders is equal to 1.71 times the radius of inner cylinder for both the cases. It is also found that as the Hartmann number increases, there is a flattening tendency for both the velocity and the induced magnetic field. The influence of the induced magnetic field is to increase the velocity profiles. © The Chinese Society of Theoretical and Applied Mechanics and Springer-Verlag Berlin Heidelberg 2012.

Parth Sarthi P.,Central University of Bihar | Dash S.K.,Indian Institute of Technology Delhi | Mamgain A.,Indian Institute of Technology Delhi
Global and Planetary Change | Year: 2012

The Indian Summer Monsoon (ISM) spans four months starting from June and ending in September and produced wide spread rainfall over Indian continents mainly due to land-sea heating contrast between Indian Ocean and large Asian land mass. ISM is controlled by semi permanent features such as heat low over northwest sector of India, cross-equatorial flow and the low level westerly jet over the Arabian Sea at 850. hPa, the tropical easterly jet over the Indian Ocean at 200. hPa, Mascarene High, and anti-cyclone over the Tibet. Any fluctuation in Indian Summer Monsoon Rainfall (ISMR) during ISM on intra seasonal to inter annual is manifestation of change in wind circulation and temperature distribution. Therefore, in order to understand the change in magnitude and pattern of ISMR under warmer climate, it is necessary to qualitatively and quantitatively assess the change in associated monsoon wind circulation and temperature distribution. The current study examines the changes in magnitude and spatial distribution of ISMR and associated change in wind circulation and temperature distribution under forced scenarios in selected climate models contributed to International Panel of Climate Change (IPCC) 4th Assessment Report (AR4). It is found that under A2, B1 and A1B emission scenarios, future projected change in spatial distribution of ISMR shows deficit and excess of over the lower part of western and eastern coast of India in simulation of HadGEM1, ECHAM5, and MIROC (Hires) model which seems to be manifestation of anomalous anticyclonic flow at 850. hPa in Arabian Sea and anomalous westerly flow at 200. hPa. . © 2012 Elsevier B.V.

Ranjan R.K.,Central University of Bihar | Routh J.,Linkoping University | Val Klump J.,University of Wisconsin - Milwaukee | Ramanathan A.L.,Jawaharlal Nehru University
Marine Chemistry | Year: 2015

The nature and distribution of lipid biomarkers (n-alkanes, n-alkanols, sterols and triterpenols) were investigated in five dated sediment cores from the Pichavaram mangrove-estuarine complex in order to: 1) identify the organic matter (OM) sources and its preservation and 2) trace recent changes associated with coastal processes and anthropogenic activities. The mangrove sediment extracts have higher biomarker concentration (22.6±13.3μg/g dry weight) than the estuarine extracts (6.42±4.92μg/g dry weight). Triterpenols are dominant biomarkers in both estuarine and mangrove sediments, and constitute >50% of the total lipid extracts. The presence of n-alkanols (n-C26,28,30) and abundance of phytosterols (stigmasterol and β-sitosterol) and triterpenols (taraxerol, β-amyrin, germanicol, and lupeol) indicate that mangrove vegetation is the primary source of sedimentary OM. The high abundance and unimodal distribution of the long-chain n-alkanes (mainly n-C25,27,29), and high values of Terrestrial Aquatic Ratio (TAR 2.4 to 41) and Carbon Preference Index (CPI>8) indicate dominance (and better preservation) of higher plant derived immature OM in mangrove sediments. In contrast, the weak dominance of high molecular weight n-alkanes, low CPI (0.75 to 0.90) and TAR (1.9 to 5.7) values, and the presence of high C27 and C28 sterols indicate that phytoplankton/algal derived OM is more pronounced in estuarine sediments. Diagenetic changes in sedimentary OM indicate that some of the lipid fractions are reactive, and as a result, they degrade more rapidly than bulk OM. These compounds follow first order decay kinetics, and concur with the downcore diagenetic changes in coastal areas. Resistance to degradation among the different lipid classes show the trend: n-alkane>sterol>triterpenol>n-alkanol. Finally, the study indicates that less freshwater discharge from the Coleroon River is causing a gradual change in mangrove vegetation. There is less input of OM derived from mangrove vegetation into recent sediments. Biomarker trends also indicate that less salt tolerant Rhizophora spp. are gradually replaced by more salt tolerant vegetation consisting of Sueda spp. and Aviccenia spp. © 2015 Elsevier B.V.

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