Papers

The peristaltic motion of an incompressible Jeffrey fluid with variable viscosity in a two-dimensional symmetric channel under the long wavelength and low Reynolds number assumptions is investigated. Analytical solutions are obtained for axial velocity and axial pressure gradient. The effects of viscosity parameter a, material parameter l₁ and amplitude ratio f on the pumping characteristics and the friction force are studied through graphs in detail.

Bis- chelates of anti-tubercular isonicolinic hydrazide drug (N,O) have been prepared and Characterised on the basis of various physico - chemical data using Mg(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Pb (II) ions. The most convincing structural evidence for these chelates is their electronic and infrared spectra. The ligand field parameters in electronic spectra and metal-ligand vibrations in far-ir are assigned.

The present study aims to assess the influence of wastes coming from washing clothes on TOTAL COLIFORMS (TC) which are present in lakes. Two locations were chosen for the monitoring in the Upper Lake of Bhopal city. The standard method as prescribed by APHA was followed during sampling and analytical study. Maximum counts of the TC was observed at stream of water near which washing activity is going on. In drinking water coming from upper lake the coliforms were observed nil due to effective chlorination. Counts of harmful bacteria was increased due to wastes coming from soap and detergent effluents.

Biomodification of coal fly ash with water hyacinth (Eichornia) with respect to improvement in physicochemical properties was done for the cultivation of Calendula. Few pot experiments were conducted to study the effect of levels of biomodified coal fly ash (CFA) on physicochemical properties of soil on the yield parameters of Calendula. Physicochemical studies have been carried out for different composts obtained by successive replacement of biomodified CFA for soil/earth in constituents of original and reference compost. In present studies CFA and water hyacinth of local origin were used. Increase in rate of growth and improvement in quality of produce was observed with the increase in percentage of biomodified CFA up to 80% with lesser use of fertilizers and irrigation water.

The solar updraft tower is a renewable energy device which uses solar thermal energy to provide upward convective acceleration to the inflow air by greenhouse effect. The hot air rising through the chimney stack drives the turbine and the rotational energy of the turbine is converted into electricity by a generator. The paper presents the design details and performance analysis of a self designed simple and compact demonstration model solar updraft tower made with locally available materials. The model is constructed with the prime aim of understanding chimney concept in experimental studies. Tests were conducted to evaluate the performance of the device by measuring the test parameters updraft velocity, temperature profiles of various junctions and power output. The results obtained indicate that the updraft velocity and power output depend on solar insolation and the height of the chimney stack with a constant collector area.

The phase behaviors of pseudo ternary mixtures of water/Tween 80/Span 80/Hexane were studied by constructing a series of phase equilibriums at 30°C. After the phases underwent separation by centrifugation, birefringence was observed under crossed polarized light. The results showed that the mixtures of Tween 80 and Span 80 were able to solubilise in water and hexane by forming association structures like micro-emulsion and liquid crystalline phases. In the attempt to formulate stable O/W emulsions; several compositions were selected from the phase equilibriums to compare their stability. The extracted essential oil of citrus hystrix was then incorporated into the emulsions as additive and fragrance. From the stability test, the results showed that the emulsions, in which the percentage of Tween 80 that was much higher than the Span 80, were more stable.

The new generations of Portable Electronic devices are intended to provide a wide range of information, services and receiving a large volume of information, data, image and video so on. Further, portable electronic devices have integrated and advanced function like multimedia portable communication, monitoring and control facilities including high resolution video transmission, selection of services and application by customer i.e. monitoring and control of industrial applications, weather forecasting, location services and connection with other transmission media as well as achieving higher level of security and authentication. Wide coverage of future Portable electronic device services being provided through portable devices are on the rise and new technologies put more computing power in these small devices. However, the slow up gradation of battery technology forms an ultimate constraint on running heavier application on these devices. To prolong battery life, many power saving techniques are being used at all levels of system design. In this paper, we have described the concept of the reversible logic gates which may be used for replacement of conventional logic gate in the design of digital integrated circuit for portable devices to reduce power dissipation resulting prolonged battery life.