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이장현,김탁근,김동호,김주현,임시형 한국정밀공학회 2017 International Journal of Precision Engineering and Vol.18 No.2
A microthermal flow sensor was developed using microfabrication techniques. The flow sensor comprised a microheater and three pairs of resistive temperature detector (RTD) sensors. The heater and the sensors were made of platinum thin films, and they were located in the middle of a thin oxide/nitride-layered membrane, which was used for thermal isolation. The operating characteristics of the developed microthermal flow sensor were investigated for various gap distances between the central heater and the upstream/ downstream RTD sensors. When the upstream/downstream RTD sensors were placed at asymmetric distances away from the central heater, the performance of the sensor improved for an air flow rate of 0-10 slpm. Our results indicate that an asymmetrical gap distance between the central heater and the upstream/downstream RTD sensors can be a key factor in improving the sensitivity and dynamic range of a microthermal flow sensor. To the best of the authors’ knowledge, these results are the first to experimentally demonstrate that an asymmetrical placement of RTD temperature sensors can improve the sensitivity and dynamic range of a microthermal flow sensor. Manuscript
최삼길,김탁근,손준영,최부귀 한국정보통신학회 2000 한국정보통신학회논문지 Vol.4 No.4
ATM 망에서는 전송률 기반의 ABR 흐름제어를 위해 다수의 알고리즘들이 제안되고 있다. 이 알고리즘들의 주 목적은 셀 손실률을 회피하고 미사용중인 대역폭을 ABR 트래픽에 의해 사용되게 하는 것이다. 이러한 알고리즘들은 EFCI와 ER 스위치에서 동작하여 ABR 트래픽을 제어하는데 사용된다. 이전 논문에서 이러한 스위치 알고리즘들을 network에 적용하여 각 알고리즘들의 성능에 의한 대역 이용률을 도시하였다. 본논문에서는 이의 보완을 위해 각 알고리즘들의 셀 손실률과 회선 이용률을 도시하여 그 성능을 비교, 분석하고자 한다. In ATM Network, many algorithms have been proposed for rate-based ABR flow control. The object of these Algorithms is to turn around from cell loss and to use the unused bandwidth by ABR Traffic. These Algorithms are applied to control ABR Traffic by EFCI and ER switches. In previous paper, we showed the using rate of bandwidth for the characteristic of each algorithm applied these algorithm network. In this paper, we will do that to apply these algorithms to a network and to make a graph of characteristic of each algorithm.