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In modern electronic complexity, testing of products has become an important area of concern. Low cost and good defect coverage are the basic goals of testing, which are again determined by fault models, test volume and time. Time depends on efficiency of test scheduling scheme. Test scheduling has therefore become an important area of research. Authors have done work on test scheduling and have proposed...
Transformer loading is quite crucial for industry as it has significant influence on transformer insulation deterioration as well as its remained life. Transformer load monitoring even becomes more substantial once transformer is operated in high ambient temperatures. Having real-time information about transformer thermal stress and insulation medium is indeed necessity. An intelligent system should...
Today's VLSI circuits have improved immensely and have become very compact and complex. The advancements made are very fast and many designs and technologies have come up, System-in-a-package SiP, 3D-SoC, TSV based SoC to name a few. The complexity of circuits is increasing and with emphasis on less time to market, the number of defects and errors are increasing. This mandates a proper testing process...
NEGs(non evaporable getters) when coated as thin film on the inner wall of vacuum pipes or chamber play vital role in the evacuation of a sealed off system after heating it to activation temperature. It creates the uniformity of pressure between two long pipes where pumping is not possible at each and every part. Ternary coating of materials Ti, Zr and V has prepared on SS304L by DC-magnetron sputtering...
This paper investigates a two-part architecture for a Knudsen vacuum pump with no moving parts. This type of pump exploits the thermal transpiration that results from the free-molecular flow in nonisothermal channels. For a high compression ratio, 162 stages are serially cascaded. The two-part architecture uses 54 stages designed for the pressure range from 760 to , and...
Steady State Tokamak (SST-1) is currently being refurbished in a mission mode at the Institute for Plasma Research with an ultimate objective of producing the first plasma in early 2012. Since Jan 2009, under the SST-1 Mission mandate, a broad spectrum of refurbishment activities have been initiated and pursued on several subsystems of SST-1. Developing sub nano-ohm leak tight joints in the magnet...
Containment threats during severe accidents may arise due to fuel-coolant interactions, hydrogen combustion, molten core-concrete interactions, and long-term pressure and temperature loading. The objective of the paper is to bring out important issues in the assessment of containment integrity during severe accidents for PWR and PHWR. The issues are identified by extensive review and synthesis of...
This paper presents a model for disassembly of the calandria tubes in Pressurized Heavy Water Reactors (PHWR) under severe accident conditions. Such a model gives criteria to decide when under severe accident condition calandria tube will get disassembled. Presently available severe accident codes use simplistic criteria based on a pre defined temperature to predict disassembly of fuel channels. The...
The flow of compressible and incompressible fluids through channels with wavy walls is encountered in many engineering applications. There have been attempts to predict the distribution of fluid parameters like pressure, temperature etc using numerical and experimental investigations. In some cases mass flow estimation is the objective of analysis and in other cases heat flux enhancement is the objective...
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