Single Field Baryogenesis

We propose a new variant of the Affleck-Dine baryogenesis mechanism in which a rolling scalar field couples directly to left- and right-handed neutrinos, generating a Dirac mass term through neutrino Yukawa interactions. In this setup, there are no explicitly CP violating couplings in the Lagrangian. The rolling scalar field is also taken to be uncharged under the $B - L$ quantum numbers. During the phase of rolling, scalar field decays generate a non-vanishing number density of left-handed neutrinos, which then induce a net baryon number density via electroweak sphaleron transitions.Comment: 4 pages, LaTe

Generating cadastral base for Kolathupalayam village in Tamil Nadu from high resolution LISS IV sensor data

In the present study an attempt was made to generate cadastral base from high resolution satellite image (LISS IV) and to integrate with land use land cover information. The digital cadastral map with survey number for Kolathupalayam village in Erode district of Tamil Nadu was scanned, digitized and parcels were extracted. Similarly parcels or field boundaries were digitized and extracted from satellite image and were statistically compared by area. The area obtained from both the source through digitization correlated well with a pearson correlation of 0.87 and it was significant at 5 per cent. Thus, the area comparisons from both methods are significant indicating boundaries of individual fields generated from satellite image matched well with the one generated from cadastral map. The cadastral base generated from satellite image was overlaid on the classified image (level III output) to identify and generate land cover information against each survey number. Thus, the LISS IV data can be used for the identification and extraction of cadastral boundaries with good accuracy

Parabolic bundles on algebraic surfaces I - the Donaldson-Uhlenbeck compactification

The aim of this paper is to construct the parabolic version of the Donaldson-Uhlenbeck compactification for the moduli space of parabolic stable bundles on an algebraic surface with parabolic structures along a divisor with normal crossing singularities. We prove the non-emptiness of the moduli space of parabolic stable bundles of rank 2

Quantumness of noisy quantum walks: a comparison between measurement-induced disturbance and quantum discord

Noisy quantum walks are studied from the perspective of comparing their quantumness as defined by two popular measures, measurement-induced disturbance (MID) and quantum discord (QD). While the former has an operational definition, unlike the latter, it also tends to overestimate non-classicality because of a lack of optimization over local measurements. Applied to quantum walks, we find that MID, while acting as a loose upper bound on QD, still tends to reflect correctly the trends in the behavior of the latter. However, there are regimes where its behavior is not indicative of non-classicality: in particular, we find an instance where MID increases with the application of noise, where we expect a reduction of quantumness.Comment: 5 pages with 4 figures, Published Versio

Seesaw Neutrino Masses with Large Mixings from Dimensional Deconstruction

We demonstrate a dynamical origin for the dimension-five seesaw operator in dimensional deconstruction models. Light neutrino masses arise from the seesaw scale which corresponds to the inverse lattice spacing. It is shown that the deconstructing limit naturally prefers maximal leptonic mixing. Higher-order corrections which are allowed by gauge invariance can transform the bi-maximal into a bi-large mixing. These terms may appear to be non-renormalizable at scales smaller than the deconstruction scale.Comment: Revised version published in PR

Assessment of knowledge regarding prevention and treatment of Ebola virus among undergraduate medical students in Chennai, India: a questionnaire based study

Background: Ebola virus disease is a dreadful condition associated with high mortality rate threatening the entire world. Our study was aimed to assess the knowledge and to create awareness about Ebola among undergraduate medical students.Methods: A self-administered, pretested questionnaire with 30 questions focusing on the general information of virus, mode of transmission, clinical features and complications of the infection, diagnosis, treatment, preventive measures, and epidemiological features was given to the study participants. Scoring system was followed, and statistical analysis was done using Chi-square test and comparison between different sections by one-way analysis of variance.Results: Totally, 263 medical students participated in the study. Based on the percentile of scores obtained they were categorized into three groups, better knowledge (18-30), average knowledge (10-17), poor knowledge (0-9). On the whole 70% students had an average level of knowledge 25% students had better knowledge and 5% students had poor knowledge. Female students had better knowledge when compared to male students (p<0.0001). Similarly, second year students had better knowledge than interns and final year students (p<0.0001). Students had less knowledge regarding clinical features, epidemiological features and relatively poor knowledge regarding diagnosis and treatment. Comparatively, knowledge about mode of transmission, preventive measures and general information of virus were better.Conclusion: This study demonstrates apparent lack of knowledge regarding various aspects of Ebola and emphasis to conduct awareness programs to manage the dreadful consequences of the disease if rises