Government College

About: Government College is a based out in . It is known for research contribution in the topics: Population & Ring (chemistry). The organization has 4481 authors who have published 5986 publications receiving 57398 citations.

Hydromagnetic boundary layer flow and heat transfer in viscoelastic fluid over a continuously moving permeable stretching surface with nonuniform heat source/sink embedded in fluid-saturated porous medium

Abstract: Analytical study for the problem of flow and heat transfer of electrically conducting viscoelastic fluid over a continuously moving permeable stretching surface with nonuniform heat source/sink in a fluid-saturated porous medium has been undertaken. The momentum and thermal boundary layer equations, which are partial differential equations, are converted into ordinary differential equations, by using suitable similarity transformation. The resulting nonlinear ordinary differential equations of momentum are solved analytically assuming exponential solution, and similarly thermal boundary layer equations are solved exactly by using power series method, with the solution obtained in terms of Kummer's function. The results are shown with graphs and tables. The effect of various physical parameters like viscoelastic parameter, porosity parameter, Eckert number, space, and temperature-dependent heat source/sink parameters enhances the temperature profile, whereas increasing the values of the suction parameter a...

Application of Colorimetry to Determine Soil Fertility through Naive Bayes Classification Algorithm

Abstract: Fertility of the soil is considered most important criterion in any agriculture practice. Nutrients present in the soil define its fertility. Mineral nutrients such as Nitrogen (N), Potassium (K), Phosphorous (P) are vital for plant growth and food production. Lack of adequate knowledge amongst the farmers about the various parameters in farming like the soil fertility, amount of fertilizer to be used, leads to degradation of the overall soil quality. In this paper, we have represented a system to test the soil fertility by using the principal of colorimetry. Colorimetry is a technique in which we measure the amount of light absorbed by the color developed in the sample. An aqueous solution of the soil sample is prepared using extracting agents and is subjected to the photodiodes of the color sensor. The solution develops a color due to reaction of nutrients in the soil with chemicals. The output by the color sensor is calibrated with standard values present in the database. To verify the results obtained by the color sensor we use the Naive Bayes classification algorithm. This algorithm classifies the intensity values of the soil solutions into three class labels namely low, medium, high. After applying the Naive Bayes classifier, we can predict the accuracy of the intended system. The intended system is thus beneficial to reduce the time required for testing the soil fertility and determining the accuracy of our results.

Electronic conduction in vitreous semiconductors in the pseudo-binary system (As2S3)1-x(PbS)x

Abstract: AC conductivity and dielectric relaxation measurements of the bulk amorphous compositions in the pseudo-binary system (As2S3)1-x(PbS)x (x = 0, 0.1, 0.4 and 0.5) in the frequency range 500 Hz-10 kHz and in the temperature span 180–450 K are reported. The temperature dependence of the ac conductivity, σac(ω), has a broad structure at all frequencies in compositions with x = 0.1, 0.4 and 0.5 whose peak position is not thermally activated. A similar structure was also observed in the data on the dielectric constant, ϵ1, which peaked at a frequency of 1 kHz in the composition with x = 0.5. Analysis of the results using the correlated barrier hopping model revealed that the electronic conduction takes place by single polaron and bipolaron hopping processes at high and low temperatures, respectively, in compositions containing Pb. The microstructure and phase-separation in the glasses containing Pb influence the electrical transport and dielectric dispersion. This study has revealed the possible presence of a phase transformation at around 300 K at a frequency of 1 kHz in the dielectric dispersion behaviour of composition with x = 0.5.