Government General Degree College

Hugli, India

Government General Degree College

Hugli, India
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Biswas A.,Government General Degree College
Environmental Science and Pollution Research | Year: 2017

Recent studies on consumption behavior have depicted environmental apprehension resulting from across wide consumer segments. However, this has not been widely reflected upon the growth in the market shares for green or environment-friendly products mostly because gaps exist between consumers’ expectations and perceptions for those products. Previous studies have highlighted the impact of perceived value on potential demand, consumer satisfaction and behavioral intentions. The necessity to understand the effects of gaps in expected and perceived values on consumers’ behavioral intention and potential demand for green products cannot be undermined as it shapes the consumers’ inclination to repeated purchase and consumption and thus foster potential market demand. Pertaining to this reason, the study aims to adopt a consumption value-gap model based on the theory of consumption values to assess their impact on sustainable consumption behavior and market demand of green products. Consumption value refers to the level of fulfillment of consumer needs by assessment of net utility derived after effective comparison between the benefits (financial or emotional) and the gives (money, time, or energy). The larger the gaps the higher will be the adversarial impact on behavioral intentions. A structural equation modeling was applied to assess data collected through questionnaire survey. The results indicate that functional value-gap and environmental value-gap has the most adversarial impact on sustainable consumption behavior and market demand for green products. © 2017 Springer-Verlag Berlin Heidelberg

Anirban S.,University of Burdwan | Anirban S.,Government General Degree College | Dutta A.,University of Burdwan
Ionics | Year: 2017

This work focuses on the structure property co-relation study of Eu3+-doped ceria nanomaterials prepared through citrate auto-ignition process and sintered at three different temperatures. The microstructure and dielectric properties were found to be affected by the sintering temperature. The particle size was found to play a major role to the migration of charge carriers in the samples. The dielectric constant has been found to control the formation of dopant-vacancy interaction though columbic interaction in defect pair (Eu′Ce – Vo ••)• and neutral trimers (Eu′Ce – Vo •• – Eu′Ce). The sample sintered at 800 °C shows the lowest value of lattice parameter due to the highest value of dopant-vacancy interaction. The migration energy for oxygen vacancy conduction was found to increase with particle size that reduces the ionic conductivity values. The rate of hopping was found to decrease due to blocking of charge-carrier diffusion due to the growth of particle. © 2017 Springer-Verlag Berlin Heidelberg

Bhar P.,Government General Degree College
European Physical Journal Plus | Year: 2017

The present paper provides a new class of interior solutions which satisfies the Karmakar condition (K.R. Karmarkar, Proc. Indian Acad. Sci. A 27, 56 (1948)). The model is generated by assuming a reasonable choice for the metric potential gr r and the model parameters are obtained accordingly since, in the case of embedding class-I, the metric co-efficients are dependent on each other. We match our interior solution to the exterior Schwarzschild line element in the presence of thin shell. The proposed model does not suffer from central singularity. The model is discussed for a neutron star of mass 1. 4 M⊙ and radius 10km. The potential stability condition of the model is also discussed. © 2017, Società Italiana di Fisica and Springer-Verlag GmbH Germany.

Adak D.,Government General Degree College | Ali A.,se National Center For Basic Science
International Journal of Modern Physics D | Year: 2017

In this paper, we examine the cosmological dynamics of a slotheon field in a linear potential. The slotheon correction term Gμ/2M2μv respects the galileon symmetry in curved spacetime. We demonstrate the future evolution of universe in this model. We show that in this scenario, the universe ends with the Big Crunch singularity like the standard case. The difference being that the time at which the singularity occurs is delayed in the slotheon gravity. The delay crucially depends upon the strength of slotheon correction. We use observational data from Type Ia Supernovae, Baryon Acoustic Oscillations, and H(z) measurements to constrain the parameters of the model for a viable cosmology, providing the corresponding likelihood contours. © 2017 World Scientific Publishing Company.

Bhar P.,Government General Degree College | Govender M.,Durban University of Technology | Sharma R.,P.A. College
European Physical Journal C | Year: 2017

In this paper we utilise the Krori–Barua ansatz to model compact stars within the framework of Einstein–Gauss–Bonnet (EGB) gravity. The thrust of our investigation is to carry out a comparative analysis of the physical properties of our models in EGB and classical general relativity theory with the help of graphical representation. From our analysis we have shown that the central density and central pressure of EGB star model is higher than the GTR star model. The most notable feature is that for both GTR and the EGB star model the compactness factor crosses the Buchdahl (Phys Rev 116:1027, 1959) limit. © 2017, The Author(s).

Anirban S.,University of Burdwan | Anirban S.,Government General Degree College | Dutta A.,University of Burdwan
Solid State Ionics | Year: 2017

This work focuses on the effect of ionic radius of dopant cations on the structural and electrical properties of different rare earth doped ceria based nanoparticles. The lattice parameter of the doped samples increases linearly with dopant ionic radius. The Gd3 + doped ceria shows minimum r.m.s. strain among the others. The conductivity and activation energy of the samples are significantly affected by the dopant ionic radius. The Gd3 + doped ceria shows highest conductivity and lowest activation energies among the other rare earth doped ceria. The conductivity decreases and activation energy increases for the dopants having ionic radii higher and lower with respect to Gd3 +. The ion movements at grain and grain boundary are also found to depend on the ionic radius of the dopants. Scaling of frequency dependent modulus spectra reveals the temperature and ionic radius independent relaxation mechanism. The dielectric constant shows that the stability of defect associates is higher for the samples having ionic radius lower and higher than the ionic radius of Gd3 + ions. The conductivity values are well supported by the VRH model. © 2017 Elsevier B.V.

Jha T.B.,Barasat Government College | Nath S.,Government General Degree College
Nucleus (India) | Year: 2016

Determination of chromosome number and their analysis particularly in vast number of economically important medicinal tree species are far from complete. Chromosome analysis provides information on chromosomal behaviour and identifies the plant with a particular karyotype formula which is the basis of genome analysis in a particular species. The present communication considered two medicinally important almost unattended Indian tree species, Bixa orellana L. and Limonia acidissima L., for chromosomal analysis using an improved cytogenetic protocol of Enzymatic Maceration and Air drying (EMA) method followed by Giemsa staining [5]. Chromosome analysis of Bixa orellana reveals to contain 2n = 14 chromosomes with karyotype formula represented by 4 M + 10 m. Chromosomes are relatively smaller in size (1.30–3.40 μm) and total chromatin length varies from 24 to 30 μm among the observed metaphase plates. Karyotype is bimodal due to the presence of a visibly long pair of chromosomes which are almost two times longer than all other pairs. Limonia acidissima L. confirms to contain 2n = 18 chromosomes and has a karyotype formula of 16 m + 2 m.t. Chromosomes are relatively smaller in size (1.53–2.83 μm) and total chromatin length varies from 32 to 43.5 μm among observed metaphase plates. Both the species show symmetrical karyotype with predominance of chromosomes showing median or nearly median primary constrictions. These chromosomal data will be useful in genome analysis of these economically important plant species for future improvement programmes. © 2016, Archana Sharma Foundation of Calcutta.

Anirban S.,University of Burdwan | Anirban S.,Government General Degree College | Dutta A.,University of Burdwan
RSC Advances | Year: 2016

Ion dynamics in pure and Dy containing nanoceria has been investigated in the light of different defect associates and their mutual interactions. The samples were prepared through citrate-nitrate auto-ignition method and their single-phase cubic fluorite structure was confirmed from X-ray diffraction and high resolution transmission electron microscopy analysis. The complex impedance spectra showed both grain and grain boundary contribution to total conductivity. The concentration dependent conductivity variation has been discussed with the help of oxygen vacancy concentration and their interactions with the defect associates. The frequency dependence of dielectric permittivity and electric modulus has been analyzed using Havriliak-Negami formalism. The relaxation mechanism is found to be dependent on the formation of different dimers and trimers. Modulus analysis has established the charge re-orientation relaxation of the defects associates. The time-temperature superposition principle has been established by scaling of different spectra. © 2016 The Royal Society of Chemistry.

Anirban S.,University of Burdwan | Anirban S.,Government General Degree College | Dutta A.,University of Burdwan
Solid State Ionics | Year: 2016

In this work, microstructural, charge carrier dynamics and dielectric relaxation properties of triple rare earth (Praseodymium, Samarium and Europium) doped ceria nanomaterials have been investigated. The microstructural investigation of the compositions has been done using Rietveld analysis of X-Ray Diffraction data. The total conductivity was found to depend on oxygen vacancy, dopant vacancy interaction and charge carrier concentration. The highest ionic conductivity was obtained for the composition containing Pr = 0.15 and Sm/Eu = 0.075. The temperature dependence of conductivity was found to follow the Vogel–Tammann–Fulcher (VTF) relation. The complex dielectric permittivity and electric modulus have been investigated using Havriliak–Negami function. The shape parameters obtained from modulus spectra and the frequency exponent obtained from conductivity spectra were found to be slightly temperature dependent. The small polaron hopping in localized states and correlated barrier hopping conduction mechanism were confirmed from complex conductivity data. The temperature independent nature of conductivity and relaxation mechanism was confirmed from master plots of modulus and conductivity spectra. The reciprocal temperature dependence of the relaxation times obtained from electrical properties was also found to follow VTF relation. © 2016 Elsevier B.V.

Chatterjee K.,Government General Degree College
Rupkatha Journal on Interdisciplinary Studies in Humanities | Year: 2016

This paper seeks to look at the culinary associations of Jhumpa Lahiri's Interpreter of Maladies to explore the metaphor of food as it is employed by Lahiri to delineate different shades and nuances of the lives of mostly the expatriate people, concentrating especially on how food negotiates the unease in living in an adopted land. The first section of this paper introduces the critical issues related to food and eating, and the second section moves on to the analysis of her short story collection Interpreter of Maladies, relating the stories to the issues discussed in the first section of the paper.

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