This book starts with the theoretical back ground of optical absorption in semiconductors. Various optical parameters like the absorption (A), transmission(T), extinction coefficient (K), refractive index (n),optical energy gap (Eg), etc. were calculated with detailed analysis of UV-VIS-IR spectra for ZnTe thin films deposited by successive ionic layer absorption and reaction (SILAR) method at various thickness and annealing temperature.The results are analyzed and discussed in detail in this book.
In the development of industry and architecture of existing buildings now days and the comfort of the user's demands, especially with regard to the noise and noise prosecute, the architect has to find out the user’s needs to use sound dampening material. One of the efforts to reduce noise, especially in the room, is by installing sound absorbing material (acoustic panel) such as carpeting, foam, pumice panels, and so on. The architecture in designing buildings, often receives requests to address the noise as in residential buildings, education, recreation, trade, hotels, and industries. They desperately need the appropriate types of material and the types of construction for acoustic material. One of the materials that can be used as damping material is pumice. Pumice takes a large part of Lombok in West Nusa Tenggara.
An investigation on correction and path analysis in redgram was carried to elicit the information on nature and extent of the genetic variability, heritability, genetic advance, character association and path analysis. Observations were recorded on thirteen characters. The analysis of variance indicated significant difference among the genotypes for all the 13 characters studied. The genotypic coefficient of variation for all the characters studied were lesser than the phenotypic coefficient of variation indicating masking effects of the environment. Character association studies and Path coefficient analysis revealed significant and positive correlation of seed yield per plant with number of secondary branches per plant, number of pods per plant, dry matter content per plant and harvest index and simultaneous improvement of these characters along with seed yield is possible.
Revision with unchanged content. Calculations of reservoir performance for petroleum reservoirs require accurate knowledge of the volumetric behavior of hydrocarbon mixtures, both liquid and gaseous. Coefficient of Isothermal oil compressibility is a measure of the fractional change in volume with respect to pressure at constant temperature. Coefficients of isothermal oil compressibility are usually obtained from reservoir fluid analysis. Reservoir fluid analysis is an expensive and time consuming operation that is not always available when the volumetric properties of reservoir fluids are needed. For this reason correlations have been developed and are being developed for predicting fluid properties including the coefficient of isothermal oil compressibility. This project developed a mathematical model for predicting the coefficient of isothermal oil compressibility based on Peng-Robinson Equation of State (PR EOS). A computer program was developed to predict the coefficient of isothermal compressibility using the developed model. The predicted coefficient of isothermal oil compressibility closely matches the experimentally derived coefficient of isothermal compressibility at pressures above and below the bubble point pressure.
The present study addresses the following objectives: i)To estimate the amount of genetic variability among different traits in eggplant, ii)To evaluate correlation coefficient and direct and indirect effect through path coefficient analysis between yield and yield contributing characters, and, iii)To determine the magnitude of genetic divergence among genotypes of eggplant. The data obtained from twenty-six diverse genotypes of eggplant was subjected to standard statistical analysis i.e. ANOVA, coefficient of variation, heritability, genetic advance, correlation coefficient, path coefficient and genetic divergence. The results obtained are: i)Analysis of variance revealed highly significant variance for all the traits studied suggesting greater variability in the existing material, ii)The association and path studies revealed that leaf area index, fruits per plant, fruit weight and days to last picking are the most important characters contributing towards yield, and, iii)High contribution of traits like leaves per plant, fruit weight and percent fruit set towards total divergence suggested selection of parents based on these characters for exploitation of hybrid vigour.
This work represents an investigation of the roles of specular and diffuse reflections in urban noise propagation with a view towards developing a simple predictive technique for long distance propagation. It is established that models based only on specular reflection and surface absorption are not sufficiently accurate to explain measured data as scattering of sound by building facades is significant. A computer model of sound propagation in a simple street was developed to take account of the probabilities associated with the branching nature of the reflection history. A simplified theory was developed incorporating an effective diffusion coefficient which increases with the order of reflection to take account of all the mixed specular-diffuse interactions. Two experimental techniques have been developed for measuring the diffusion coefficient of street facades and applied to a scale model experiment. The results obtained for values of diffusion coefficient showed the expected trend with increasing the facade irregularities.
This work develops and analyzes optimization technique for obtaining a geometry shape of classical HAWT blades based on set of criteria. It allows designer to determine the weight of such factors as power coefficient, sound pressure level and cost function in the overall process of blade shape optimization. Optimization method applies Desirability function. It was never used before in that kind of technical problems, and in this sense it can claim to originality of research. To do analysis and optimization processes more convenient the software application was developed.