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안병호,조국현,An, Byeong-Ho,Jo, Guk-Hyeon 한국정보처리학회 1999 정보처리논문지 Vol.6 No.2
A Multicast transfer is a critical delivery method to provide a transport service to multipeer applications, the various problems on the multicast transfer environments have been occurred from the results of current research. One of these problems is the multicast transport service issue to guarantee reliability and scalability. First, this paper presents the related research of the reliable multicast transport methods, and then proposes a new transfer architecture using the Agent Sender and Receiver Concept(ASRC) to solve a reliable multicast transfer issue. we also propose a method to apply the proposed architecture(ASRC) to the well-known sender-initiated and receiver-initiated transport protocol. In order 새 validate the proposed ASRC architecture, t도 applied sender and receiver system si compared and analyzed over the processing requirement and maximum throughput.
안병호(Byeong Ho An),허인재(In Jae Heo),김진오(Jin Oh Kim) 한국소음진동공학회 2021 한국소음진동공학회 논문집 Vol.31 No.1
This paper describes a method to shorten the minimum detectable distance of an ultrasonic sensor in a liquid-level meter. The minimum detectable distance, which is limited by the number of ultrasonic transmission pulses and the ringing of the vibration plates in the sensor, needs to be shortened by an appropriate method. The purpose of this research is to improve the proximal measurement capability by combining the ultrasonic sensor for a liquid-level meter with a waveguide. Flat- and wedged-wall-type waveguides were designed and finite-element analysis was performed for ultrasound transmission and reception. Experiments were conducted for the distance and water level measurements by using the ultrasonic sensor combined with a waveguide. The results of the finite-element analysis and experiments showed that the wedged-wall-type waveguide produced reasonable measurements of the distance in the proximal range. We confirmed the improvement of the proximal-measurement capability of an ultrasonic level meter, thus shortening the minimum detectable distance by combination with a waveguide.