Inflaton Decay in an Alpha Vacuum

We study the alpha vacua of de Sitter space by considering the decay rate of the inflaton field coupled to a scalar field placed in an alpha vacuum. We find an {\em alpha dependent} Bose enhancement relative to the Bunch-Davies vacuum and, surprisingly, no non-renormalizable divergences. We also consider a modified alpha dependent time ordering prescription for the Feynman propagator and show that it leads to an alpha independent result. This result suggests that it may be possible to calculate in any alpha vacuum if we employ the appropriate causality preserving prescription.Comment: 16 pages, 1 figure, Revtex 4 preprin

Model simulation of tide-induced currents in Gauthami-Godavari estuary

Predictive spatial distribution of flow field has been simulated from the time series data on currents and tides during dry season (11-19, February, 2009) in the Gauthami-Godavari Estuary utilizing TIDAL model. A 2D-Tidal Estuarine model has been considered (instead of 3D model) due to well-mixed type system and its circulation is dominated by tides during the observational period. The model forcing functions consist of wind and tidal elevations along the open boundaries and no fresh water inflow from the main stream and no land flood in river system. The bathymetry data of the river basin has been collected and supplemented to the model as one of the rigid boundary conditions to evaluate integration. The bottom roughness length (K) was adjusted to achieve model calibration and verification in model simulations of flow field. The model simulation results are in qualitative agreement with the observational data with calibrated bottom roughness length which is about 0.085 m. Model results reveal that the majority of flow was found to be along the channel axis (i.e. high iso-bath contour). During flood time, flow is south-west direction and it is changed to northeast direction during ebb period which is indicating that the model results resemble flow in the real eastern system

Small Quadrupole Deformation for the Dipole Bands in 112In

High spin states in $^{112}$In were investigated using $^{100}$Mo($^{16}$O, p3n) reaction at 80 MeV. The excited level have been observed up to 5.6 MeV excitation energy and spin $\sim$ 20$\hbar$ with the level scheme showing three dipole bands. The polarization and lifetime measurements were carried out for the dipole bands. Tilted axis cranking model calculations were performed for different quasi-particle configurations of this doubly odd nucleus. Comparison of the calculations of the model with the B(M1) transition strengths of the positive and negative parity bands firmly established their configurations.Comment: 10 pages, 11 figures, 2 table

A Multi-Level Approach of Audio-Steganography and Cryptography

ABSTRACT: After a rapid growth of cyber revolution, developing a secret communication is a major task of security that has gained increasing importance. Cryptography and steganography are the best methods for introducing hidden communication. Current technology allows steganography applications to hide any digital file inside of any other digital file. Due to the existence of their redundancies, audio and video files are much suitable for the purpose of hiding. Audio steganography is a challenging subject because human auditory system (HAS) is more sensitive than human visual system (HVS). It requires a text or audio secret message to embed within a carrier audio file. Several basic audio Steganographic methods like LSB method, parity coding etc., are in existence, but the proposed LSB with XORing method gives high security which undergoes cryptographic randomized algorithm too. By performing two level encryption, capacity and robustness will be increased

Evidence that whitefly-transmitted cowpea mild mottle virus belongs to the genus Carlavirus

Two strains of whitefly-transmitted cowpea mild mottle virus (CPMMV) causing severe (CPMMV-S) and mild (CPMMV-M) disease symptoms in groundnuts were collected from 2 distinct agro-ecological zones in India. The host-range of these strains was restricted to Leguminosae and Chenopodiaceae, and each could be distinguished on the basis of symptoms incited in different hosts. The 3'-terminal 2500 nucleotide sequence of the genomic RNA of both the strains was 70% identical and contained 5 open reading frames (ORFs). The first three (P25, P12 and P7) overlapped to form a triple gene block of proteins, P32 encoded the coat protein, followed by P12 protein located at the 3' end of the genome. Genome organization and pair-wise comparisons of amino acid sequences of proteins encoded by these ORFs with corresponding proteins of known carlaviruses and potexviruses suggested that CPMMV-S and CPMMV-M are closely related to viruses in the genus Carlavirus. Based on the data, it is concluded that CPMMV is a distinct species in the genus Carlavirus

Characterization of the large (L) RNA of peanut bud necrosis tospovirus

The nucleocapsids purified from groundnut plants systemically infected with peanut bud necrosis tospovirus (PBNV) contained both viral (v) and viral complementary (vc) sense L RNAs. Defective forms of L RNA containing core polymerase region were observed. The full length L RNA of PBNV was sequenced using overlapping cDNA clones. The 8911 nucleotide L RNA contains a single open reading frame (ORF) in the vc strand, and encodes a protein of 330 kDa. At the 5' and 3' termini of the v sense RNA there were 247 and 32 nt untranslated regions, respectively, containing an 18 nt complementary sequence with 1 mismatch. Comparisons of the predicted amino acid sequence of the L protein of PBNV with other members of Bunyaviridae suggest that the L protein of PBNV is a viral polymerase. The L protein had highest identity in the core-polymerase domain with the corresponding regions of tospoviruses, tomato spotted wilt tospovirus and impatiens necrotic spot tospovirus

High-spin spectroscopy of I-122

High-spin states in I-122 have been investigated using the Cd-116(B-11,5n)I-122 reaction at a beam energy of 65 MeV and gamma-ray coincidence events were recorded with the INGA spectrometer. The level scheme of I-122 has been extended up to spin I = 30. Experimental features, such as band-crossing frequencies, aligned angular momenta, signature splitting, and B(M1)/B(E2) ratios have been used for configuration assignments to low-energy band structures. Maximally aligned states involving all eight particles outside the Sn-114 core and states with one particle antialigned have been identified. Cranked Nilsson-Strutinsky calculations have been used to interpret high-spin structures

The complete nucleotide sequence and genome organization of the M RNA segment of peanut bud necrosis tospovirus and comparison with other tospoviruses

The M RNA of peanut bud necrosis tospovirus is 4801 nucleotides in length. It comprised 2 ORFs in an ambisense organization and terminal inverted repeats. The 3 prime large ORF (3363 nucleotides in the virus-complementary strand) encoded a protein with a predicted size of 127.2 kDa which was identified as the glycoprotein precursor (GP) of the G1 and G2 glycoproteins. A comparison of the deduced amino acid sequence of GP revealed 37% identity and 58-59% similarity with that of tomato spotted wilt tospovirus (TSWV,serogroup I) and impatiens necrotic spot tospovirus (INSV, serogroup III) and 21-23% identity and 44-47% similarity with members of the genus Bunyavirus. The 5 prime small ORF (924 nucleotides in the virus-sense strand) encoded a 34.2 kDa protein which was identified as the non-structural (NSm) protein based on 41-43% identity and 60-63% similarity with TSWV and INSV. Defective RNA molecules derived from the genomic M RNA were detected during continuous passage of the virus by sap inoculations