Baihata Chariali, India
Baihata Chariali, India

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Haloi H.,Pub Kamrup College | Borah J.,Arya Vidyapeeth College | Datta L.,Gauhati University
Transactions of the Institute of Indian Geographers | Year: 2014

The Education For All (EFA) is a worldwide novel mission of UNESCO which is centered around six goals. While each of the six EFA goals is individually important, it is also useful to have a means of indicating progress towards EFA as a whole. The EFA Development Index (EDI), a composite of relevant indicators, provides one way of doing so at least for the four most easily quantifiable EFA goals. The present study is an attempt to examine three components of Education For All Development Index namely Universal Primary Education (UPE), Quality of Education and Gender Parity and Equality and finally to assess Primary Education EDI of four Community Development Blocks of Assam identified to represent four socio-economically backward communities namely Tea Garden Labour community, Char community, Scheduled Tribe community and Scheduled Caste community respectively. The study is based on secondary data which have been analyzed and discussed with necessary statistical techniques and inferences are drawn based on them. The EDI of the selected blocks are far below the countries average which may be related to literacy status. The situation demands a systematic approach for attaining the goal of Universal Primary Education by the socio-economically backward communities of Assam.


Dev Choudhury B.K.,Pub Kamrup College
Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011 | Year: 2011

Non-empty bulk consideration in brane-world cosmological set-up is welcome from different needs. But still the basis of taking unconstrained non-empty bulk is phenomenological. So one is bound to be cautious to consider anything in bulk. With the present accelerated expansion of the universe, we judge the legitimacy of taking modified chaplygin gas, as a phantom candidate in bulk. Moreover, we check the validity of Generalised Second Law of thermodynamics in the model with cosmological event horizon and apparent horizon envelope.


Saikia J.,Pub Kamrup College | Dev Choudhury B.K.,Pub Kamrup College
Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011 | Year: 2011

The exotic fluid dubbed as dark energy that stands for the theoretical explanation of observationally confirmed late time acceleration of the universe is itself the fertile ground for research. One of the most demanding explanations from dark energy model is its crossing behaviour of equation of state. Out of different proposals to have crossing, interacting model that postulates interaction between dark energy and dark matter also deserves attention from various reasons. We consider interacting dark energy model in the bulk. And then getting an approximate solution of modified Friedmann equation, find some points for discussion.


Choudhury N.,Pub Kamrup College | Singh F.,Inter University Accelerator Center | Sarma B.K.,Gauhati University
Radiation Effects and Defects in Solids | Year: 2013

The present study compares structural and optical modifications of lead sulfide (PbS) quantum dots under swift heavy ion (SHI) irradiation. PbS quantum dots are prepared following an inexpensive chemical route using polyvinyl alcohol as the dielectric host matrix. SHI irradiation of the samples is carried out with 100 MeV Si7+ ion beam with fluences in the range from 1×1011 to 3×1013 ions cm-2 and their structural and optical properties, before and after irradiation, are compared by X-ray diffraction (XRD), photoluminescence (PL) and UV-Vis spectroscopy. The structural parameters of PbS quantum dots are studied by X-ray line profile analysis using the Williamson-Hall plot. The values of average crystallite sizes are found to vary from 8 to 18 nm. XRD studies confirmed the formation of the cubic nanocrystalline PbS. Improvement of crystalline quality for lower fluences is exhibited by an increase in the X-ray intensities of the films. The UV-Vis absorption spectra reveal blue shift relative to the bulk material. Size enhancement of PbS quantum dots after irradiation has been indicated in XRD line profiles of the samples which has also been supported by optical absorption spectra. PL studies of all the samples are carried out with excitation wavelength 350 nm. A broad PL emission with peak centered at 473 nm is observed in pristine as well as all the irradiated samples. PL study also shows that PL intensity increases with ion fluences. © 2013 Taylor and Francis Group, LLC.


Rahman A.,Pub Kamrup College | Chakrabarty D.,Handique Girls College
International Journal of Agricultural and Statistical Sciences | Year: 2011

A method of estimation of parameters associated to a linear curve, which is simpler than the method of estimation of the same by solving the normal equations of the curve has been constructed with the help of calculus of finite difference. The method has been discussed in the case of fitting of linear curve to observed data when the values of the independent variable are at unequal intervals.


Choudhury N.,Pub Kamrup College | Singh F.,Inter University Accelerator Center | Sarma B.K.,Gauhati University
Indian Journal of Pure and Applied Physics | Year: 2012

Nanocrystalline PbS prepared onto glass substrates by chemical bath deposition technique are irradiated with 100 MeV Ni8+ ion beams with different fluences from 1×10 11 to 1×10 13 ions cm -2. Analysis of the samples by X-ray diffraction show increase of average grain size from 11 nm for the pristine samples to 17 nm for the samples irradiated with 1×10 11 ions cm -2. The grain size remains constant at higher fluences. The UV-visible optical absorption measurement also show that band gap of nanocrystalline PbS decreases from 1.9 eV for the pristine samples to 1.7 eV for the samples irradiated with fluences of 1×10 11 ions cm -2 and then remains almost constant. It is observed from photoluminescence (PL) study that the PL intensity increases for irradiated samples with minimum intensity for pristine sample.


Medhi U.J.,Pub Kamrup College | Talukdar A.K.,Gauhati University | Deka S.,Institute of Advance Studies in Science and Technology
Journal of Environmental Biology | Year: 2011

The physico-chemical characteristics of paper mill industry effluent were measured and some were found to be above the permissible limits prescribed by Indian irrigation water standard. A study was conducted in pots to investigate the effects of different concentrations (10,20,30,40,50,60,70,80 and 100%) of paper mill effluent on growth and production of rice, mustard and pea for three years. The study reveals that the paper mill effluent has deleterious effect on the growth of crop at higher concentrations. However, at lower concentration ( viz. 10 to 40% in rice, 10 to 50% in mustard and 10 to 60% in pea) of effluent, beneficial impact on general welfare of the crops was noticed. Growth and development was increased with increasing the concentration of the effluent up to 30% in rice, 40% in mustard and 50% in pea. Investigation showed that the growth and production of rice, mustard and pea was found maximum at a concentration of 30,40 and 50% effluent respectively. © 2011 Tri veni Enterprises Vikas Nagar, Lucknow, INDIA.


Mochahari P.K.,Gauhati University | Rajbongshi A.,Gauhati University | Choudhury N.,Pub Kamrup College | Singh F.,Inter University Accelerator Center | Sarma K.C.,Gauhati University
Advanced Materials Letters | Year: 2015

Cadmium sulphide (CdS) nanostructured films were prepared by chemical bath deposition (CBD) method at room temperature. The prepared films were subjected to swift heavy ion (SHI) irradiation by using 100 MeV Si8+ ion beams at various fluences from 1 x 1011 to 1 x 1013 ions/cm2. Structural, morphological, optical properties of the pristine and irradiated films were characterized by X-ray diffractrometer (XRD), high resolution transmission electron microscope (HRTEM), UV-Vis spectroscopy and Raman spectroscopy. XRD study confirms the formation of nanocrystalline cubic phase in all the films. The crystallite size is found to increase from 7nm to 9 nm and shift of peak positions are observed due to irradiation. The lattice strain and dislocation density of the samples are of the order of 10-3 and 1016 m-2 respectively and the values are found to decrease upon irradiation. HRTEM images show that the shapes of the particles are nearly spherical and the selected area electron diffraction (SAED) pattern of HRTEM have also supported the formation of cubic phase CdS. The optical absorption spectra exhibit shift in the fundamental absorption edge and the optical band gap decreases from 2.585eV to 2.513 upon SHI irradiation. Three intense Raman lines for pristine as well as irradiated CdS have been observed and all the samples show shift in Raman lines relative to bulk CdS due to phonon localization. The SHI irradiation on chemically deposited CdS films is an important tool used for modification of structural, morphological and optical properties of the films for possible applications in device fabrication. © 2015 VBRI press.


Choudhury N.,Pub Kamrup College
Indian Journal of Physics | Year: 2016

PbS nanoparticles have been grown in polyvinyl alcohol matrix on glass and mica substrates by chemical bath deposition method at room temperature. The structural investigation of nanocrystalline PbS has been carried out by X-ray diffraction profile analysis using Williamson–Hall and modified Williamson–Hall methods. The values of the crystallite size are found to be within the range from 10 to 17 nm having very high dislocation density of the order of 1017 m−2. The optical band gaps of the films have been determined from optical absorption measurements and found to be within the range from 2.1 to 2.8 eV. The band gap is shifted from infrared to the visible region on the account of quantum confinement in the nanostructured films due to small crystallite size. Such films, with a band gap lying in the visible region, are suitable for use as solar absorbers rather than infrared applications. © 2015, Indian Association for the Cultivation of Science.


PubMed | Pub Kamrup College
Type: Journal Article | Journal: Journal of environmental biology | Year: 2011

The physico-chemical characteristics of paper mill industry effluent were measured and some were found to be above the permissible limits prescribed by Indian irrigation water standard. A study was conducted in pots to investigate the effects of different concentrations (10, 20, 30, 40, 50, 60, 70, 80 and 100%) of paper mill effluent on growth and production of rice, mustard and peafor three years. The study reveals that the paper mill effluent has deleterious effect on the growth of crop at higher concentrations. However, at lower concentration (viz. 10 to 40% in rice, 10 to 50% in mustard and 10 to 60% in pea) of effluent, beneficial impact on general welfare of the crops was noticed. Growth and development was increased with increasing the concentration of the effluent up to 30% in rice, 40% in mustard and 50% in pea. Investigation showed that the growth and production of rice, mustard and pea was found maximum at a concentration of 30, 40 and 50% effluent respectively.

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