In the present study an attempt has been made to delineate and characterized various geomorphic unit in part of the Yamuna river basin, around Etmadpur area of Agra district, Uttar Pradesh. The drainage, contour and delineated geological units have been overlaid on IRS-1D-LISS-III imagery (bands 2, 3 and 4) to delineate and characterize different geomorphic units. The information generated from the satellite data in the form of vector layers has been used in GIS to generate geomorohological map of the study area. The various geomorphological units viz; ravinous land, sand bar, younger alluvium, paleochannel, older alluvium, recent flood plain, older undulating surface have been delineated. The study area is characterized by alluvium (an admixture of gravel, sand, silt and clay) of the Quaternary age deposited over the rocks belonging to the Vindhyan Supergroup. The present study demonstrates that IRS-1D-LISS-III data in conjunction with drainage and contour parameters enable a detailed evaluation of various geomorphological units in order to utilize for evaluation and management of natural resources.
The mathematical modeling of the characteristics of solar cell materials by considering several factors like material properties, geometrical parameters, shape factors and other environmental variables is described in this paper. An equation based on certain assumptions to simulate the real operating conditions is formulated to the performance of a solar cell. The graphical plots for Carnot efficiency are obtained for different permutations and combinations to indicate the reasons for actual operating conditions, prevailing environmental conditions and also material properties of a solar cell.
Steady Laminar free convection flow of an electrically conducting fluid along a porous hot vertical plate in the presence of heat source/sink under variable viscosity & thermal conductivity is investigated. The problem is studied numerically, applying Runge Kutta Shooting method. The velocity and temperature distribution are shown graphically. It is observed that the variable viscosity & thermal conductivity effects are significant on the problem."
Significant positive correlation is observed between solar-wind speed and plasma temperature (monthly average) the best positive correlation is found in the minimum phases of both the solar cycles 22 & 23. Significant negative correlation is observed between solar-wind speed and proton density (monthly average while the best negative correlation is found in the minimum phases of solar cycles 22 & 23.
The paper investigates the capabilities of I-DEAS Mechanical Computer Aided Design software (MCAD) on the modelling of artefacts which have got freeform geometry. Freeform geometry is the geometry which uses curves and surfaces, which is not made up of Constructive Solid Geometry (CSG) such as cubes, spheres, and cylinder. To achieve this, an object having a freeform geometry i.e. a mobile handset was chosen, as the geometry of mobile handset is quite typical and challenging and commonly used in day today life. This was done by reviewing the freeform geometry of mobile handset which is being used in industry. After the modelling was complete the mobile handset was rendered. The modelled mobile handset in the software was used to produce a stereo lithography (STL) file format and given for manufacturing or prototyping. In I-DEAS the objects can be manipulated at any time during modelling using the history access and also the modelled objects can be manipulated after stitching . The production of STL file format in I-DEAS of the completed objects take less time.
Stability constants of ML, ML2 and ML3 type binary complexes of Th(IV), Fe(III) & Al(III) - Histidine system as determined by ionophoretic method are reported.
To bridge the gap between supply and utilization of solar thermal energy storage (TES) systems are developed. The TES systems using both sensible and latent heat storage systems are gaining much attention because of its advantages like high energy storage in a unit volume and its isothermal behavior during the charging and discharging processes. The experimental investigation is done to analyze the effect of phase change material (PCM) capsule material on the performance of TES system during charging and discharging processes. The PCM capsules are spherical in shape and its outer diameter is 68mm. In the process of investigation the spherical capsules are made using three different materials viz. i) High Density Poly Ethylene (HDPE), ii) Aluminum (Al) and iii) Mild Steel (MS). The PCM material used in the experiments is paraffin (type II). The TES system is coupled with flat plate solar collector. The experimental investigation showed that the charging and recovery of storage energy is less affected by the spherical capsules material. The variables like charging time and discharging quantity are varied around 5% for the different capsule materials. Even though Aluminum thermal conductivity is much higher than HDPE and mild steel, its influence on performance of TES system is very less due to very high internal heat resistance of PCM material stored in the spherical capsules.