Fast and Efficient Light Intensity Modulation in SOI with Gate-All-Around Transistor Phase Modulator

We report fast modulation (>30 GHz) in a SOI resonant cavity using integrated Bragg mirrors and a gate-all-around transistor as active element. Modulation depth >90% can be obtained in 12.5 μm long devices

Considering the User in the Wireless World

The near future promises significant advances in communication capabilities, but one of the keys to success is the capability understanding of the people with regards to its value and usage. In considering the role of the user in the wireless world of the future, the Human Perspective Working Group (WG1) of the Wireless World Research Forum has gathered input and developed positions in four important areas: methods, processes, and best practices for user-centered research and design; reference frameworks for modeling user needs within the context of wireless systems; user scenario creation and analysis; and user interaction technologies. This article provides an overview of WG1's work in these areas that are critical to ensuring that the future wireless world meets and exceeds the expectations of people in the coming decades

Randomised trials relevant to mental health conducted in low and middle-income countries: a survey

<p>Abstract</p> <p>Background</p> <p>A substantial proportion of the psychiatric burden of disease falls on the world's poorest nations, yet relatively little is known about randomised trials conducted in these countries. Our aim was to identify and describe a representative sample of mental health trials from low and middle-income countries.</p> <p>Methods</p> <p>6107 electronic records, most with full text copies, were available following extensive searches for randomised or potentially randomised trials from low and middle-income countries published in 1991, 1995 and 2000. These records were searched to identify studies relevant to mental health. Data on study characteristics were extracted from the full text copies.</p> <p>Results</p> <p>Trials relevant to mental health were reported in only 3% of the records. 176 records reporting 177 trials were identified: 25 were published in 1991, 45 in 1995, and 106 in 2000. Participants from China were represented in 46% of trials described. 68% of trials had <100 participants. The method of sequence generation was described in less than 20% of reports and adequate concealment of allocation was described in only 12% of reports. Participants were most frequently adults with unipolar depression (36/177) or schizophrenia (36/177). 80% of studies evaluated pharmacological interventions, a third of which were not listed by WHO as essential drugs. 41% of reports were indexed on PubMed; this proportion decreased from 68% in 1991 to 32% in 2000.</p> <p>Conclusion</p> <p>In terms of overall health burden, trial research activity from low and middle-income countries in mental health appears to be low, and in no area adequately reflects need.</p

Dipole antenna and distributed MEMS phase shifter fully integrated in a single wafer process for beam steering applications

This paper reports on the design and fabrication of a fully integrated antenna beam steering concept for airborne applications at 17 GHz. The system is based on a single wafer process including a dipole antenna, a balun and a 2-bit distributed MEMS phase shifter (in a 7 x 3 mm high-resistivity-silicon dice). To our knowledge, it is the first time that such integration has been done. First results of individual devices are reported and simulations of the whole concept are originally presented. (C) 2009 Elsevier B.V. All rights reserved