No abstract

Nanoparticles of cadmium oxide have been synthesized by soft chemical route using thioglycerol as the capping agent. The crystallite size is determined by X-ray diffraction technique and the particle size is obtained by transmission electron microscope. The band gap of the material is obtained using Tauc relation to UV-visible absorption spectrum. The photoluminescence emission spectra of the sample are measured at various excitation wavelengths. The molecular components in the material have been analyzed by FT-IR spectroscopy. The dielectric dispersion of the material is investigated in the temperature range from 313 to 393 K and in the frequency range from 100 Hz to 1 MHz by impedance spectroscopy. The ColeCole model is used to describe the dielectric relaxation of the system. The scaling behavior of imaginary part of impedance shows that the relaxation describes the same mechanism at various temperatures. The frequency-dependent electrical data are also analyzed in the framework of conductivity and electrical modulus formalisms. The frequency-dependent conductivity spectra are found to obey the power law.

CdS nanoparticles have been synthesized by a chemical reaction route using thiophenol as a capping agent. The frequency-dependent dielectric dispersion of cadmium sulphide (CdS) is investigated in the temperature range of 303-413 K and in a frequency range of 50 Hz-1 MHz by impedance spectroscopy. An analysis of the complex permittivity (ε and ε ) and loss tangent (tan δ) with frequency is performed by assuming a distribution of relaxation times. The scaling behaviour of dielectric loss spectra suggests that the relaxation describes the same mechanism at various temperatures. The frequency-dependent electrical data are analysed in the framework of conductivity and modulus formalisms. The frequency-dependent conductivity spectra obey the power law.

With the advancement of technologies, methods of teaching, learning and evaluation in higher education need modification from the current scenario. Teaching is key component in educational planning, which is one of the most important factor in steering educational plans. Despite the importance of good teaching, the outcomes are far from ideal. This paper deals to investigate effective teaching, learning and evaluation for higher education. Rapid changes in the modern world has caused the Higher Education System to face overabundance of challenges. Therefore, the training of more eager and thoughtful individuals in interdisciplinary fields is vital. Research and exploration to figure out effective teaching and learning methods are one of the most important necessities in the modern educational systems. Professors have a determining role in training eager and thoughtful individuals. Universities and colleges are the places where new ideas sprout; roots strike deep and grows tall and sturdy. These places embrace the entire universe of knowledge. These are the spaces where creative minds converge, interact with each other and construct visions for noble realities. Established notions of truth are challenged in the pursuit of knowledge.

No abstract