This paper presents a simulation technique for step-down DC-DC converters based on the hybrid systems theory. The proposed technique is able to simulate the behaviour of the converter in both transient and steady state regimes. To show the applicability of the proposed technique a buck converter is considered. Both output voltage and inductor current are acquired with a digital oscilloscope and...

As semiconductor technology scales down, leakage-power becomes dominant in the total power consumption of LSI chips. We propose a compiler technique to turn off functional units that are expected to be idle for long periods of time for reducing leakage-power using fine grain power gating technique. Also, we propose a hybrid technique which combines a compiler and hardware based technique to max...

In this paper we survey a design technique for partitioning on trees. This technique, the shifting algorithm technique, is a top-down greedy technique. A partition of a tree is represented by associating cuts with edges of the tree. The basic operation of the technique is a local transformation called a shift of a cut from an edge to an adjacent edge of the tree. We review several shifting algo...

materials and methods: in order to achieve this, recombinant plasmid harboring antisense sequences targeting both of pta and acka was assembled, after transfecting to the cells, its effects on the cell growth and acetate accumulation in the minimal media was assessed and compared with the control, the plasmid without antisense cassette, in presence and absence of iptg in escherichia coli bl21 (...

In this paper we present top down and bottom up methods for generating coarse grain dataaow or mul-tithreaded code, and evaluate their eeectiveness. The top down technique generates clusters directly from the intermediate data dependence graph used for compiler optimizations. Bottom up techniques coalesce ne-grain dataaow code into clusters. We measure the resulting number of clusters executed,...

Information analysis often involves decomposing data into sub-groups to allow for comparison and identification of relationships. Breakdown Visualization provides a mechanism to support this analysis through user guided drill-down of polyarchical metadata. This metadata describes multiple hierarchical structures for organizing tuple aggregations and table attributes. This structure is seen in f...

Traditional approaches to sensor validation involve periodic instrument calibrations. These calibrations are expensive both in labor and process down-time. Many periodic sensor calibration techniques require the process be shut down, the instrument taken out of service, and the instrument loaded and calibrated. This method can lead to damaged equipment, incorrect calibrations due to adjustments...