BACKGROUND We evaluated if exposure to RF-EMF was associated with reported quality of sleep in 2,361 children, aged 7 years. METHODS This study was embedded in the Amsterdam Born Children and their Development (ABCD) birth cohort study. When children were about five years old, school and residential exposure to RF-EMF from base stations was assessed with a geospatial model (NISMap) and from i...

Portable products such as pagers, cordless and digital cellular telephones, personal audio equipment, and laptop computers are being used increasingly. Because these applications are battery powered, reducing power consumption is vital. In this report we first give the properties of low power design and techniques to exploit them on the hardware level such as: minimize capacitance, avoid wastef...

Future wireless networks will enable people on the move to communicate with anyone, anywhere, at any time, using a range of multimedia services. The exponential growth of cellular telephone and paging systems coupled with the proliferation of laptop and palmtop computers indicate a bright future for such networks, both as stand-alone systems and as part of the larger networking infrastructure. ...

the last decade, the telecommunications industry has experienced explosive growth in wireless technology. This growth, together with recent developments in hardware miniaturization, has opened a new dimension to future wireless networks whose ultimate goal is to provide ubiquitous and universal personal communications without regard to mobility or location [1, 2]. To achieve such an objective, ...

Commencing with the brief history of mobile communications and the portrayal of the concept of wireless multimedia communications, the implications of Shannon's theorems regarding joint source and channel coding are addressed. Following a brief introduction to speech, video and graphical source coding as well as the cellular concept, a short description of the mobile propagation channel is o er...

significantly to 8.0 mU/ml with T3-T4 within normal range. Oedema feet, puffiness of face disappeared and patient became asymptomatic. Again after six months he developed oedema feet and other milder symptoms; T.S.H. was 12.5 mU/ml, T3-0.6 ng/L and T4-5.0 pg/dL Thyroxine dose was raised to 100 ugm . He became asymptomatic in two months under guidance of physician and psychiatrist. In this parti...

This paper presents a software prototype of wireless network for the Internet Things (IoT) based on DECT (Digital Enhanced Cordless Telecommunication) standard. It proposes an architecture encapsulating commands from most common IoT protocol, MQTT (Message Queuing Telemetry Transport), into SIP (Session Initiation Protocol) packets. A module is created to embed MQTT-SN (MQTT Sensor Networks) pa...

Technical progress in bringing SiGe heterojunction bipolar transistor (HBT) technology to reality has been exceptionally rapid. The first functional SiGe HBT was demonstrated in December 1987, only fifteen years ago. In this fifteen years, since the first demonstration of a functional transistor, SiGe HBT technology has emerged from the research laboratory, entered manufacturing on 200-mm wafer...

AbstructDynamic Channel allocation in Cellular Networks have become very popular off late due to the flexibility obtained by using any of the available channels in any cell as long as the Interference level is below a given threshold. In our problem we study Cellular networks under Dynamic Channel Allocation and propose a Two Dimensional Markov Chain model to analyze the performance of the syst...

Recently there has been a considerable effort devoted to intelligent joint speech coding and iorward error correction (FEC) coding [I] as well as to equal [2] and un-equal protection coded modulation [3]. In reference [4] Hagenauer introduced an intelligent framework for considering source significance-, channel stateand decoder reliability-information in order to achieve the best possible perf...