The Radio Frequency Identification System, a wireless communication system, recently is applied to vehicular identification; this motivates the analysis of the propagation environment for outdoor RFID systems. The RFID System applied to the vehicular identification consists of the reader, the tag and the radio channel, which is made up by the ground (asphalt), the free space and surrounded by w...

This article describes the developments in the field of emerging new military radio systems to be deployed in Finland. Finnish software radio programme is the tool to deploy these new systems. The demonstrator platform, that is being build, is a software defined radio wherein the developed wideband applications can be demonstrated. The systems that will be deployed on the demonstrator platform ...

Radio communication is crucial for Public and Governmental Security (P&GS) systems. No matter if a police officer waits for a radio message to get to his next scene or a firefighter needs to contact the operator, there will always be the need for a reliable, secure and fast radio communication structure. Besides the legacy requirements, however, there are also increasing demands for the radio d...

The increasing demand of wireless applications has put a lot of limitations on the use of available radio spectrum is limited and precious resource. Many survey of spectrum utilization shows that entire spectrum is not used at all the times, so many of the radio spectrum is underutilized. Some of the frequency bands in the spectrum are unoccupied, some of the frequency bands less occupied and f...

Background and Objectives: There are different types of vascular access. We compared the patency rate for six months in ulnar-basilic fistula and Radio-Cephalic fistula for vascular access in hemodialysis patients.   Methods: The study was performed on 60 patients of 50.6±13.5 years of age with end-stage renal failure undergoing hemodialysis from 2012-2014 in Imam Ali hospital in Zahedan. Pat...

To improve the performance of 802.11 WLAN systems under congestion conditions, an agent-based radio resource management system is proposed that can dynamically change an Access Point’s radio coverage pattern. A low-cost four sector semi-smart antenna array is used for access points. With a distributed simulation system using Multi-Agent Platform, we present statistical results showing system pe...

The radio-quiet quasar SDSS J1536+0441 shows two broad-line emission systems that Boroson & Lauer interpret as a candidate binary black-hole system with a separation of 0.1 pc (0.02 mas). From new VLA imaging at 8.5 GHz, two faint sources, separated by 0.97 (5.1 kpc), have been discovered within the quasar’s optical localization region. Each radio source is unresolved, with a diameter of less t...