The paper reports the characteristic variation in the received radio signals at VHF and VLF bands over Kalyani during two severe earthquakes, one at Sikkim on September 18, 2011 and the other at Indonesia on April 11, 2012.

An overview of the turbulent structures seen by MF, HF and VHF radars in the troposphere, stratosphere and mesosphere is presented, drawing on evidence from previous radar measurements, in situ studies, laboratory observations, observations at frequencies other than those under focus, and modeling studies. We are particularly interested in structures at scales less than one radar pulse length, ...

INTRODUCTION Three-dimensional radar reflectivity data and the algorithms used to help meteorologists interpret these data are extremely important in nowcasting. However, a number of inherent problems arise when tracking thunderstorm cells with 3-dimensional reflectivity. These problems include (1) identifying cells in a complex multi-cellular thunderstorm environment, (2) detecting thunderstor...

ITH the advent of ultra-high-frequency television and the subsequent allocation of specific UHF channels, the need for a VHF-UHF television tuner becomes apparent. This tuner should ideally make the maximum use of the same components on VHF and UHF, so that there would be a minimum duplication of parts. This design should be one which would give optimum performance and still be easy to fabricat...

This document presents a method to optimize integrated LDMOS (Lateral Double-Diffused MOSFET) transistors for use in very high frequency (VHF, 30-300 MHz) dc-dc converters. A transistor model valid at VHF switching frequencies is developed. Device parameters are related to layout geometry and the resulting layout vs. loss tradeoffs are illustrated. A method of finding an optimal layout for a gi...

Uslijed porasta broja korisnika i intenzivnog korištenja frekvencijskog VHF područja javila se potreba za povećanjem njegova kapaciteta. Također, javljaju se i potrebe za novim vrstama usluga, kao što je prijenos podataka, što postojeći analogni sustavi ne mogu uspješno podržati. Stoga su u ovome radu analizirana obilježja relevantnih kopnenih digitalnih komu ni­ kacijskih sustava s ciljem utvr...