T . Venkat Narayana Rao

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In January 2004, we investigated a cluster of acute hepatitis in Baripada, Orissa, India. Between January and March 2004, 538 cases (definition: fever with loss of appetite and jaundice) were reported (attack rate: 263 per 100 000, 5 deaths, case fatality rate: 0.93%). Forty-seven of 48 sera were positive for IgM antibodies to hepatitis E virus. Cases(More)
In the present study, we have used the Weather Research and Forecasting (WRF) model to simulate the features associated with a severe thunderstorm observed over Gadanki (13.5 N, 79.2 E), over southeast India, on 21 May 2008 and examined its sensitivity to four different microphysical (MP) schemes (Thompson, Lin, WSM6 and Morrison). We have used the WRF(More)
Long-term VHF radar (53 MHz with 3 beamwidth) observations at Gadanki (13.5 N, 79.2 E), India, during the period from September 1995 to August 1999 are used to study monthly, seasonal and annual medians of vertical eddy diffusivity, K in the troposphere, lower stratosphere and mesosphere. First, the spectral width contribution due to non-turbulent effects(More)
A total of 1727 blood samples were cultured aerobically over a one year period, of which 201(11.8%) were positive. The ratio of Gram positive to Gram negative bacteraemia was 1:1. The three antimicrobials having the highest activities against the Gram positive isolates were amikacin, cefotaxime, and ciprofloxacin to which 88.5, 81.7 and 80.7 percent of the(More)
The Megha-Tropiques, an Indo French mission, with four on-board payloads was launched in October 2011 to improve our understanding on hydrological cycle and radiation budget. The SAPHIR (Sondeur Atmosphérique du Profil d’Humidité Intertropicale par Radiométrie), a sounder for profiling humidity, is a key payload and expected to play a major role in(More)
Retrieval of vertical profiles of temperature and humidity parameters using a VHF radar is described in this paper. For this, Indian MST radar located at Gadanki (13.5◦ N, 79.2◦ E) has been operated in a special mode. First, vertical velocities are collected continuously using the radar and are subjected to Fast Fourier Transform (FFT) analysis to obtain(More)
Quantum cryptography is a technology that ensures the security. Quantum cryptography ensures secure communication based on the fundamental physical laws. The quantum cryptography is based on the two elements of quantum mechanics -the Heisenberg Uncertainty principle and the principle of photon polarization. This paper focuses on the principle of quantum(More)
Hydroxamic acid chelates of the type ML2, ML2', and ML2" where M = Cu(II), Ni(II) or Co(II) and L = N,2'-diphenylacetohydroxamic acid (N,2'-DPAHA), L' = 2,2'-diphenylacetohydroxamic acid (2,2'-DPAHA), and L" = 2-phenylacetohydroxamic acid (2-PAHA) have been isolated and characterized on the basis of elemental analysis and infrared and magnetic data. These(More)