منابع مشابه
COUPLET: Coupled Electrothermal Simulation
The aim of the project COUPLET (supported by Institut Farman) is to study the electrothermal effects of the degradation of the metallisation layer of power semiconductor dies. In this first technical report of the project, we describe our work of modeling and simulation of the behavior of a power transistor. The die is represented by four elementary transistors driven by a distributed gate sign...
متن کاملA curious case of missing couplet IUCDs
Intrauterine contraceptive device (IUCD) is one of the most widely used family planning methods. Although considered to be generally safe, it can be associated with problems such as missing IUCD. There have been many reports of isolated missing IUCD but reports of two missing IUCDs in the same patient are very rare. We report the case of a 35-year-old lady with such an occurrence that was diagn...
متن کاملThe glutamine/glutamate couplet and cellular function.
All cells require glutamine as a nitrogen donor as well as an energy source for cell-specific functions. Understanding how glutamine utilization is metered to these demands is fundamental to basic cell processes as well as to therapeutic manipulation of regulatory mechanisms. The regulatory role of the glutamine/glutamate couplet in cellular function is illustrated for acid-base homeostasis and...
متن کاملA hypothesis of couplet molecules and couplet cells in gastric function and an association with Helicobacter pylori
BACKGROUND Gastrin, from G-cells, and histamine, from enterochromaffin-like (ECL) cells, are two of the hormones that regulate gastric activity. DISCUSSION It is proposed that the G-cells and the ECL cells are coupled by the couplet molecules gastrin and histamine and by a prior asymmetrical cell division. The gastrin (from G-cells) stimulates the ECL cells to produce and secrete histamine wh...
متن کاملMalmquist Productivity Index for Multi Time Periods
The performance of a decision making unit (DMU) can be evaluated in either across-sectional or a time-series manner, and data envelopment analysis (DEA) is a useful method for both types of evaluation. The Malmquist productivity index (MPI) evaluates the change in efficiency of a DMU between two time periods. It is defined as the product of the Catch-up and Frontier-shift terms. In this pape...
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ژورنال
عنوان ژورنال: Science
سال: 1915
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.42.1095.908