Defence Research Agency

About: Defence Research Agency is a based out in . It is known for research contribution in the topics: Synthetic aperture radar & Radar. The organization has 1211 authors who have published 1109 publications receiving 31542 citations.

Conducted susceptibility measurements on integrated circuits

Abstract: Outlines a research programme covering the development and evaluation of the microwave susceptibility characteristics of integrated circuits (ICs). Tests will be carried out to investigate the variation between component batches, device technologies and various device manufacturers. The research programme has been formulated/funded by the DRA, Civil Aircraft EMC Research clubs (CAEC), under EUREKA project 461. This phase of the research programme has been subdivided to cover the development/evaluation of jigs designed to carry out conducted susceptibility testing of Dual Inline (DIL) and Surface Mount (SMD) devices. This paper essentially covers the progress made in the evaluation of the test methodology for testing DIL devices. In parallel to the conducted susceptibility measurement programme being carried out at DRA, Farnborough, there is a programme being carried out by GEC Marconi, also funded by the CAEC, carrying out research into the radiated susceptibility testing of integrated circuits.< >

Profiling of smokers and snuffers among young Finnish men - cross-sectional epidemiological study

Abstract: Objective: The purpose of this study was to get new information from several sources about the background factors of Finnish smokers, snuffers, and dual users. Profiles of young smokers and snuffer...

High-speed super-resolution techniques for passive millimeter-wave imaging systems

Abstract: We present an improved regularized pseudo inverse method that can super-resolve passive imagery. The algorithm is a non-iterative technique that involves convolution operations in the spatial domain which allows an image to be processed in the frame time of the imager. Our method gives encouraging results, providing a significant increase in spatial resolution with only a small reduction in the final signal to noise ratio. Examples are given of the application of the technique to millimeter-wave (mm-wave) images and a comparison is made with other fast deconvolution methods and computer intensive super-resolution algorithms. Finally, a brief discussion is given of how high speed hardware is used to implement this algorithm.

Taxonomy for requirements analysis

Abstract: Techniques that are claimed to be applicable to analysing requirements for software intensive systems have been available for many years, but the extent to which they address this problem for large, complex systems is open to question. The techniques tend to focus on aspects of the system that are understood by specialist system designers, rather than on the issues that concern its prospective owners and users. It is not always clear how, if at all, some of these concerns may be analysed using existing techniques. This taxonomy provides a framework for classifying techniques according to the concerns that need to be addressed and the abstract frames in which analysis might be performed. Identification of all concerns reveals analysis needs, that must be satisfied by the set of abstract frames in which aspects of the system are modelled. Populating the taxonomy can identify where techniques are already available and where further research is needed. >