Abstract
A genetic algorithm used to design radio-frequency binary-weighted differential switched capacitor arrays (RFDSCAs) is presented in this article. The algorithm provides a set of circuits all having the same maximum performance. Thus article also describes the design. implementation. and measurements results of a 0 25 mu m BiCMOS 3-bit RFDSCA. The experimented results show that the circuit presents the expected performance up to 40 GHz. The similarity between the evolutionary solutions, circuit simulations, and measured results indicates that the genetic synthesis method is a very useful tool for designing opitmum performance RFDSCAs (C) 2010 Wiley Periodicals, Inc Microwave Opt Technol Lett 52, 629-634, 2010. Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.25009

Abstract
In this paper, a printed two C-shaped monopoles array for WLAN MIMO application has been proposed. By using the neutralization technique, high isolation between the two antenna elements has been achieved while the distance between them is only 0.09(lambda 2.4GHz). The experiment results indicate that the proposed antenna array has -10dB bandwidth from 2.34 to 2.55 GHz and has an isolation less than -12 dB over the entire required operation band. The proposed antenna has a compact size of 30x14 mm(2) and can be easily integrated into wireless devices.

Abstract
The aim of this study was to assess the factorial structure of the Brazilian version of CSAI-2, using several structures suggested in previous studies. Two samples consisted of Brazilian soccer players, 266 from regional level (age 22.87 +/- 4.08 years; athletic experience 11.32 +/- 4.15 years) and 263 from national level (age 23.16 +/- 4.37 years; athletic experience 11.11 +/- 4.78 years) were used. The CSAI-2 is a 27-item inventory that measures negativism, physiological activation and self-confidence in a competitive setting. The results of CFA according to the original structure showed some inadequacy of the model. The model proposed by Cox, Martens, Russell (2003), composed of three factors (17-item), demonstrated better adjustment to the regional level sample (chi 2/df = 1.871, CFI = .934, GFI = .916, RMSEA = .057), while the model suggested by Coelho, Vasconcelos-Raposo, Fernandes (2007), composed of two factors (18-item), adapted better to the national level sample (chi 2/df = 1.701, CFI = .924, GFI = .914, RMSEA = .052). When we analyzed the two samples together, Coelho et al. (2007) was the better model, because it displayed greater invariance. The use of this model was suggested in the assessment of intensity of negative thoughts and the subsequent confirmation of its psychometric properties is recommended.

Abstract
This paper describes a tempo induction and beat tracking system based on the efficient strategy (initially introduced in the BeatRoot system [Dixon S., "Automatic extraction of tempo and beat from expressive performances." Journal of New Music Research, 30(1):39-58, 2001]) of competing agents processing musical input sequentially and considering parallel hypotheses regarding tempo and beats. In this paper, we propose to extend this strategy to the causal processing of continuous input data. The main reasons for this are threefold: providing more robustness to potentially noisy input data, permitting the parallel consideration of a number of low-level frame-based features as input, and opening the way to real-time uses of the system (as e.g. for a mobile robotic platform). The system is implemented in C++, permitting faster than real-time processing of audio data. It is integrated in the MARSYAS framework, and is therefore available under GPL for users and/or researchers. Detailed evaluation of the causal and non-causal versions of the system on common benchmark datasets show performances reaching those of state-of-the-art beat trackers. We propose a series of lines for future work based on careful analysis of the results. © 2010 International Society for Music Information Retrieval.

Abstract
The identification of patterns on large repositories of code can be of paramount importance to guide the design of new hardware accelerators, To acquire the suitability of a certain hardware accelerator and to generate application-specific architectures that maximize hardware reuse. This work intends to research and develop methods to both acquire the presence of a given pattern (map-suitability) and to identify common and highly similar patterns in code repositories (design-suggestions). The approach being proposed is based on a number of identification layers that refine the selections at each stage. We analyze two possible complementary options for a high-level layer. A first option is based on the representation of programs as a sequence of symbols and string matching and clustering algorithms are then used to expose similar patterns. A second option is based on tree matching techniques for identifying the presence of user's input patterns in the programs under inspection. We are evaluating our approach using the MiBench, Media-Bench, UTDSP, and SNU code repositories. The results show the potential of our approach to identify approximate patterns that can be implemented by merging highly similar structures. © 2010 IEEE.

Abstract
Integrated optics coaxial two, three and four telescope beam combiners have been fabricated by hybrid sol-gel technology for astronomical applications. Temporal and spectral analyses of the output interferometric signal have been performed, and their results are in mutual good agreement. The results of the characterization method employed are cross-checked using contrast measurements obtained independently, demonstrating that the chromatic differential dispersion is the main contributer to contrast reduction. The mean visibility of the fabricated devices is always higher than 95 %, obtained using a source with spectral bandwidth of 50 nm. These results show the capability of hybrid sol-gel technology for fast prototyping of complex chip designs used in astronomical applications. (C) 2010 Optical Society of America