Reionization constraints on primordial magnetic fields

We study the impact of the extra density fluctuations induced by primordial magnetic fields on the reionization history in the redshift range: $6 < z < 10$. We perform a comprehensive MCMC physical analysis allowing the variation of parameters related to primordial magnetic fields (strength, $B_0$, and power-spectrum index $n_{\scriptscriptstyle \rm B}$), reionization, and $\Lambda$CDM cosmological model. We find that magnetic field strengths in the range: $B_0 \simeq 0.05{-}0.3$ nG (for nearly scale-free power spectra) can significantly alter the reionization history in the above redshift range and can relieve the tension between the WMAP and quasar absorption spectra data. Our analysis puts upper-limits on the magnetic field strength $B_0 < 0.358, 0.120, 0.059$ nG (95 % c.l.) for $n_{\scriptscriptstyle \rm B} = -2.95, -2.9, -2.85$, respectively. These represent the strongest magnetic field constraints among those available from other cosmological observables.Comment: Accepted for publication in MNRAS; 9 pages, 6 figure

Biological indicators for monitoring water quality of MTF canals system

Biological models, diversity indexes, were developed to predict environmental effects of NASA's Mississippi test facility (MTF) chemical operations on canal systems in the area. To predict the effects on local streams, a physical model of unpolluted streams was established. The model is fed by artesian well water free of background levels of pollutants. The species diversity and biota composition of unpolluted MTF stream was determined; resulting information will be used to form baseline data for future comparisons. Biological modeling was accomplished by adding controlled quantities or kinds of chemical pollutants and evaluating the effects of these chemicals on the biological life of the stream

Isotropic and Anisotropic Regimes of the Field-Dependent Spin Dynamics in Sr2IrO4: Raman Scattering Studies

A major focus of experimental interest in Sr2IrO4 has been to clarify how the magnetic excitations of this strongly spin-orbit coupled system differ from the predictions of anisotropic 2D spin-1/2 Heisenberg model and to explore the extent to which strong spin-orbit coupling affects the magnetic properties of iridates. Here, we present a high-resolution inelastic light (Raman) scattering study of the low energy magnetic excitation spectrum of Sr2IrO4 and doped Eu-doped Sr2IrO4 as functions of both temperature and applied magnetic field. We show that the high-field (H>1.5 T) in-plane spin dynamics of Sr2IrO4 are isotropic and governed by the interplay between the applied field and the small in-plane ferromagnetic spin components induced by the Dzyaloshinskii-Moriya interaction. However, the spin dynamics of Sr2IrO4 at lower fields (H<1.5 T) exhibit important effects associated with interlayer coupling and in-plane anisotropy, including a spin-flop transition at Hc in Sr2IrO4 that occurs either discontinuously or via a continuous rotation of the spins, depending upon the in-plane orientation of the applied field. These results show that in-plane anisotropy and interlayer coupling effects play important roles in the low-field magnetic and dynamical properties of Sr2IrO4.Comment: 8 pages, 4 figures, submitte

Insiders, Outsiders, and Involuntary Unemployment

Sexual harassment is perceived to be a major impediment to female labor force participation. We use the random assignment of U.S. federal judges setting geographically-local precedent, and the fact that judges’ biographies predict decisions in sexual harassment cases, to document the causal impact of forbidding sexual harassment. Consistent with an insider-outsider theory of involuntary unemployment, but in contrast to a mandated benefits theory of employment protections, pro-plaintiff sexual harassment precedent spurred the adoption of sexual harassment human resources policies, encouraged entry of outsiders, and reduced gender inequality in labor supply and wages among the population. These effects were comparable to the effects of the Equal Employment Opportunity Act and greatest in the construction industry, which was heavily affected by sexual harassment litigation

Insiders, Outsiders, and Involuntary Unemployment

Sexual harassment is perceived to be a major impediment to female labor force participation. We use the random assignment of U.S. federal judges setting geographically-local precedent, and the fact that judges’ biographies predict decisions in sexual harassment cases, to document the causal impact of forbidding sexual harassment. Consistent with an insider-outsider theory of involuntary unemployment, but in contrast to a mandated benefits theory of employment protections, pro-plaintiff sexual harassment precedent spurred the adoption of sexual harassment human resources policies, encouraged entry of outsiders, and reduced gender inequality in labor supply and wages among the population. These effects were comparable to the effects of the Equal Employment Opportunity Act and greatest in the construction industry, which was heavily affected by sexual harassment litigation

Sorption of Water & Some Straight- & Branched-chain Aliphatic Alcohols by Casein

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Introduction, time and compositions of Acharya Ugraditya

The testimony existing in Mysore Archeological Report 1922 proves that, the disciple of Shri Nandi, who was a complete scholar of Ayurveda, Ugraditacharya is the author of most ancient, main and important Grinth of medical importance “The Kalyan Karaka Grinth”. Ugraditacharya was contemporary of the Rashtrakuta King “Amoghvasha I and Calukya King Kali Vishnuvardhana V. A resident of Telengana having abode at Ramgiri hills of district called Ramtirtha or Ramkod, where he composed “Kalyankaraka” while sitting in Jinalaya in late eighth century

The Geographical Surroundings and Development of Cultural Civilization of Mewar

The historical developments in Mewar State were accompanied with cultural and artistic activities leading to provide historic Mewar a prominent place in terms of efforts contributed to the development and preservation of human civilization and especially Indian culture. It is evident on the basis of archeological evidence from excavation in the terrain of morrains, river vallegs and rocks that about a million years ago, human began to move from the time of ancient stone age to the pre-historic era of human civilization