The radar interferometer technique on two separate antennas. The coherence first used at the magnetic equator in Peru is (amplitude) of the cross spectrum at each also a very powerful means for studying auroral frequency is a measure of how localized the plasma instabilities. We present here the first scattering target corresponding to that results, obtained with a 49.92 MHz, 20-25 KW peak part...

BACKGROUND Investigations were conducted by the authors to explore an outbreak of viral hemorrhagic fever (VHF) reported in 2010 from Al-Mukalla city, the capital of Hadramout in Yemen. METHODS From 15-17 June 2010, the outbreak investigation period, specimens were obtained within 7 days after onset of illness of 18 acutely ill patients hospitalized with VHF and 15 household asymptomatic cont...

Global Lightning and sprIte MeasurementS (GLIMS) mission is now ongoing on Exposed Facility of Japanese Experiment Module (JEM-EF) of the International Space Station (ISS). This paper focuses on an electromagnetic (EM) payload of JEM-GLIMS mission, very high frequency (VHF) broadband digital InTerFerometer (VITF). JEM-GLIMS mission is designed to conduct comprehensive observations with both EM ...

Empirical propagation loss models play a crucial role in wireless communication system with their cost-effectiveness and simplicity. In this letter, we present mathematical characterization of the Federal Communication Commission (FCC) F(50,50) curve for Very High Frequency (VHF) Ultra (UHF) band. The proposed empirical model is based on novel step-wise fitting FCC signal strength data. intende...

Introduction The hippocampus (HF) is known to be involved in episodic memory and this brain region has increasingly been linked to drug-seeking behaviour in rodent behavioral models of substance abuse. Cocaine is a drug of abuse that can alter the magnitude of long-term potentiation (LTP) in the CA1 region of the HF (1). LTP is a form of synaptic plasticity that is thought to underlie learning/...

Arenaviruses such as Lassa fever virus (LASV) and lymphocytic choriomeningitis virus (LCMV) are benign in their natural reservoir hosts, and can occasionally cause severe viral hemorrhagic fever (VHF) in non-human primates and in human beings. LCMV is considerably more benign for human beings than Lassa virus, however certain strains, like the LCMV-WE strain, can cause severe disease when the v...

A general theory on noise matching performance of receivers with electrically small antennas (ESAs) emphasizing HF (3MHz to 30MHz) and VHF (30MHz 300MHz) applications is presented through theoretical analyses, discussions, circuit simulations practical device models from a state-of-the art semiconductor technology. The considers all the sources their interplay. impact both physical constraint E...

In this study, Atomic Layer Deposition (ALD) equipment was used to deposit Al2O3 film on a p-type silicon wafer, trimethylaluminum (TMA) and H2O were as precursor materials, then the post-annealing process conducted under atmospheric pressure. The films annealed at different temperatures between 200–500 °C compared ascertain effect of passivation confirm changes in structure thickness before af...

We derive total components lengths based on the characteristics and angular locations of the VHF radiation detected by an interferometer. The method differentiates between negative leaders and fast negative processes and applies simple relationships from the physics of lightning to deduce the channel lengths of these components for both intra-cloud and cloud-to-ground lightning flashes. The stu...

Modern concepts of operations for multinational operations within NATO and partners require air-interface interoperability for VHF and UHF tactical communications. This contrasts with the historical approach to interoperability of using wired gateways at the higher network levels. As a result of the historical trends, national combat-net radios (CNR) have been procured from industry conforming ...