Multiuser communication is demonstrated using experimental data (450-550 Hz) collected in deep water, south of Japan. The multiple users are spatially distributed either in depth or range while a 114-m long, 20-element vertical array (i.e., base station) is deployed to around the sound channel axis (~1000 m). First, signals received separately from ranges of 150 km and 180 km at various depths ...

Damavand volcano is located 60 km to the East North- East of Tehran. It is a dormant stratovolcano outcrop in the Alborz Mountains of northern Iran and is the highest mountain (5670 m) in the Middle East and West Asia. Mazandaran Province, one of the most populous provinces by population density, Semnan and Gorgan provinces further east are neighbours of the Damavand. Volcanism in Damavand goes...

In order to determine the source and critical areas of wind Erosion, Sistan Plain, IRIFR-E.A method was applied. According to geomorphological investigations, the studied area consists of the following two main units namely: Pediment with 1 type and 8 geomorphological facies, and playa with 2 types of flatland and desert type that includes 9 geomorphological facies. On the basis of sediment, th...

One way to achieve high energy efficiency in buildings and a reliable architectural system is use the experiences of local architecture. In this connection, central courtyard an element that was used past create comfort hot dry climates Kashan, Iran. A large part literature has focused on space investigated factors such as height, length, presence water courtyard, which are directly related stu...

BACKGROUND Several studies are available on organizational commitment of employees in different organizations. However, the organizational commitment and job involvement of the employees in the prehospital emergency medical system (PEMS) of Iran have largely been ignored. OBJECTIVES This study aimed to investigate the organizational commitment and job involvement of the employees of PEMS and ...

BACKGROUND Parenteral transmission is a common route of transmission for both human immunodeficiency virus (HIV) and hepatitis C virus (HCV); therefore, hepatitis C viral infection is highly prevalent among people infected with HIV. OBJECTIVES This study was designed to examine the epidemiology and describe the clinical manifestation as well as the HCV genotypes in patients from the city of K...

Ice Sheet backscatter around South Pole Station was measured from several different azimuthal angles using RADARSAT-1 S A R data. We observed strong azimuthal anisotropy (3-4 dB) between radar look directions across and along the prevailing wind direction. We speculate that the azimuthal variation of backscatter around the South Pole area may be largely attributed to systematically oriented sas...

background and objectives: knowledge management (km) has emerged as a pathway towards competitive advantage in current complex industrial environment. the aim of the present study was to explore the relationship between km effectiveness and various organizational factors including social interactions (trust, communication and coordination), infrastructure factors (structure, information technol...