Distribution of the delay time and the dwell time for wave reflection from a long random potential

We re-examine and correct an earlier derivation of the distribution of the Wigner phase delay time for wave reflection from a long one-dimensional disordered conductor treated in the continuum limit. We then numerically compare the distributions of the Wigner phase delay time and the dwell time, the latter being obtained by the use of an infinitesimal imaginary potential as a clock, and investigate the effects of strong disorder and a periodic (discrete) lattice background. We find that the two distributions coincide even for strong disorder, but only for energies well away from the band-edges.Comment: Final version with minor corrections in text, 4 pages, 2 PS figure

Diffusion at constant speed in a model phase space

We reconsider the problem of diffusion of particles at constant speed and present a generalization of the Telegrapher process to higher dimensional stochastic media ($d>1$), where the particle can move along $2^d$ directions. We derive the equations for the probability density function using the ``formulae of differentiation'' of Shapiro and Loginov. The model is an advancement over similiar models of photon migration in multiply scattering media in that it results in a true diffusion at constant speed in the limit of large dimensions.Comment: Final corrected version RevTeX, 6 pages, 1 figur

Isolation and Characterization of Serratia species in Silk Rearing Environment

Different isolates obtained from the study area (Chickkabalpura(13° 26' N and 77° 46' E), Ramanagara (12° 54' N and 78° 02' E) and Kolar(13° 09' N and78° 11' E) Districts of Karnataka) in seasons of rain, winter, and summer were examined for Serratia Sp., septicemia pathogen of silkworm. These samples were subjected to microbiological isolation on minimal media and presumptive identification was done by visualizing pigment production in culture plate. Rhizosphere soil isolates obtained in rainy season produced red pigment, so compared with other known red pigmented and non-pigmented septicemia causing bacteria by injecting into the haemocoel of Silkworm larvae for identification of septicemia symptoms. Soil isolate with septicemia symptoms tested for Koch postulates. Soil isolate showed similarities with other septicemia bacteria in symptoms as well as in the colony and biochemical characteristics.Results of soil isolate obtained compared with specimen species data of the Bergy's Manual of Determinative Bacteriology (9th Edition) and found that soil isolate to be Serratia plymuthica. Our study will augment the knowledge of bacterium which later helps in prevention and cure of septicemic disease of silkworm. This bacterium can also be used in the fermentation process, production of prodiogisin and production of different enzymes

Effect of Antibiotics on Varied Density of Septicemia Causing Bacteria of Silkworm

Antibiotics are widely used in sericulture industry for mitigating losses caused by bacterial septicemia among microbial disease. The use of standardized antibiotic concentration for different densities of bacteria by Kirby-Bauer disk diffusion method determines minimum inhibitory concentration for septicemia bacteria. Inferences obtained by impregnating standard antibiotics like Ampicillin (25 mg), Gentamycin (30 mg) and Kanamycin (30 mg) through disk diffusion method shows that maximum inhibition in Gentamycin (30 mg), intermediate inhibition zone in Kanamycin (30 mg) and lowest or no inhibition zone for â-lactamic Ampicillin (25 mg) are shown. Insights into standard antibiotic susceptibility concentration of septicemia agents augment silk production by maximizing utilization of food and lowers development of antibiotic resistant septicemia bacteria. Advance investigation into an area under disk diffusion yields Minimum Inhibitory Concentration (MIC) for human infection from these opportunistic pathogen

Vectorization, Obfuscation and P4 LLVM Tool-chain

This thesis broadly focuses on three different areas: Loop Vectorization, Code Obfuscation, and P4LLVM compiler. The work in Loop vectorization starts with a comparison of Auto-vectorization of GCC, ICC and LLVM compilers and show their strengths and weakness. As an attempt to improve LLVM’s Auto-vectorization, we propose to improve Loop Distribution using exact dependences from Polly. Our work on Loop Distribution shows promising results. We developed an LLVM based Code Obfuscation engine with various obfuscation techniques as transformation passes, our techniques are novel and are different from existing works [1]. In hardware circuit obfuscation several methods were proposed at the hardware level to secure the IP. Our approach is to obfuscate the circuits at the software level, using code obfuscation techniques

Shell Banding Pattern and Chromosomal Studies on the Giant African Snail, Achatina Fulica (Bowdich) (Achatinidae: Gastropoda)

A pioneer report on the shell banding, chirality (shell coiling) and chromosomal studies on populations of the giant African snail, Achatina fulica (Bowdich) (Achatinidae: Gastropoda) occurring in Bengaluru region is detailed in this paper. Shell coiling in A. fulica was found to be dextral and significant variation in banding pattern within and between populations was observed. The chromosome number from well spread diakinesis and metaphase stages of meiosis in ovotestis is found to be n=30 and 2n=60, which is similar to earlier works, also the similarity in different stages is in agreement with the earlier reports

Correcting the quantum clock: conditional sojourn times

Can the quantum-mechanical sojourn time be clocked without the clock affecting the sojourn time? Here we re-examine the previously proposed non-unitary clock, involving absorption/amplification by an added infinitesimal imaginary potential($iV_{i}$), and find it {\it not} to preserve, in general, the positivity of the sojourn time, conditional on eventual reflection or transmission. The sojourn time is found to be affected by the scattering concomitant with the mismatch, however small, due to the very clock potential($iV_{i}$) introduced for the purpose, as also by any prompt scattering involving partial waves that have not traversed the region of interest. We propose a formal procedure whereby the sojourn time so clocked can be corrected for these spurious scattering effects. The resulting conditional sojourn times are then positive definite for an arbitrary potential, and have the proper high- and low-energy limits.Comment: Corrected and rewritten, RevTeX, 4 pages, 2 figures (ps files) include

Continental Spatio-Temporal Data Analysis with Linear Spectral Mixture Model Using FOSS

This work demonstrates the development and implementation of a Fully Constrained Least Squares (FCLS) unmixing model developed in C++ programming language with OpenCV package and boost C++ libraries in the NASA Earth Exchange (NEX). Visualization of the results is supported by GRASS GIS and statistical analysis is carried in R in a Linux system environment. FCLS was first tested on computer simulated data with Gaussian noise of various signal-to-noise ratio, and Landsat data of an agricultural scenario and an urban environment using a set of global end members of substrate (soils, sediments, rocks, and non-photosynthetic vegetation), vegetation that includes green photosynthetic plants and dark objects which encompasses absorptive substrate materials, clear water, deep shadows, etc. For the agricultural scenario, a spectrally diverse collection of 11 scenes of Level 1 terrain corrected, cloud free Landsat-5 TM data of Fresno, California, USA were unmixed and the results were validated with the corresponding ground data. To study an urbanized landscape, a clear sky Landsat-5 TM data were unmixed and validated with coincident World View-2 abundance maps (of 2 m spatial resolution) for an area of San Francisco, California, USA. The results were evaluated using descriptive statistics, correlation coefficient, RMSE, probability of success, boxplot and bivariate distribution function. Finally, FCLS was used for sub-pixel land cover analysis of the monthly WELD (Wen-enabled Landsat data) repository from 2008 to 2011 of North America. The abundance maps in conjunction with DMSP-OLS nighttime lights data were used to extract the urban land cover features and analyze their spatial-temporal growth