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HONG, Eonpyo,JUNG, Eungu,HONG, Junhee,YIM, Jaewon,HAR, Dongsoo The Institute of Electronics, Information and Comm 2009 IEICE transactions on information and systems Vol.92 No.7
<P>The ITU-T J.83 Annex B is a widely adopted standard in North America for digital video and audio transmission over coaxial cable. This paper proposes a new parallel processing architecture of the parity checksum generator and syndrome generator specified in the standard for packet synchronization and error detection. The proposed parallel processing architecture removes the performance bottleneck occurring in the conventional serial processing architecture, leading to significant decrease in processing time for generating a parity checksum in transmitter and a syndrome in receiver. Implementation results show that the proposed parallel processing architecture reduces the processing time by 92% for parity checksum generation and by 81% for syndrome generation over the conventional serial processing architecture.</P>
홍준희(Junhee Hong),최중인(Jung In Choi),이종현(Jong-Hyun Lee),남영우(Young Woo Nam) 대한전기학회 2009 전기학회논문지 Vol.58 No.10
The problem of determining the proper capacity of electric vehicle charging station is studied in the presented paper. Based on the expected arrival rate and the expected charging time, we calculate the proper capacity that guarantees electric vehicles get service better than a given lower bound which is termed the loss of charging probability. The problem is studied by using certain queueing models. We first formulate the problem as a queueless model of type M/M/n/n, known as the Erlang loss system. And then the M/M/n/K type queueing model is formulated to consider the parking space constraint. Results of the study may be used for designing the electric vehicle charging station.
Analysis on the Present Situation of Golf Vocational Training in China
Xiaoyu Zhang(Xiaoyu Zhang),Junhee Hong(Junhee Hong) 동아시아무역학회 2022 Journal of East Asian Trade(JEAT) Vol.4 No.1
Purpose – Golf started on September 30th, 1982, when Zhang Junlin registered and established Shenzhen Golf Club Co., Ltd. in Shenzhen Municipal Market Supervision Administration. In September of the same year, it was approved by Shenzhen Municipal People’s Government. The establishment of the first established golf club in China also marks the official entry of modern golf into the Chinese market. In 1997, Shenzhen University established the first golf major in China, and now there are nearly 600 golf courses in China. China’s golf industry is still developing at a high speed despite policy restrictions. However, there are still some deficiencies in golf vocational training in China. Through the analysis of the shortcomings, the reasonable development direction is put forward. Design/Methodology/Approach – With the development of golf industry, supporting education has also been carried out in China. Since Shenzhen University, many colleges and universities have also carried out related majors. Golf industry is not limited to golf, but also includes lawn planting, garden art, fashion design, sporting goods manufacturing, hotel management, real estate development, golf education and training, etc., which makes the golf industry bring a variety of jobs and personnel needs. It also makes golf clubs pay more attention to talent cultivation. In this paper, the problems existing in the training of golf talents in clubs and universities are listed and analyzed by means of investigation, to find out the appropriate direction. Findings – Children are an important member of golf club staff. How to carry out good caddy training and improve caddy’s professional level and comprehensive quality has become the task focus of golf club managers. At present, the common problems of golf caddies in China are: 1. There is no uniform training standard, which makes the quality of caddies uneven. 2. The income of caddies is unstable. 3. Most of the temporary employment relationships between caddies and clubs. 4. Caddy talent reserve can’t meet the needs of club staff. 5. Caddy occupation requires physical condition, and it is difficult to transform after unemployment. Research Implications – A good teaching foundation is an important way to cultivate talents, and only the mutual communication between clubs and colleges can help improve the ability of golf vocational training in China.
홍준희,신우철 충남대학교 공업교육연구소 2000 論文集 Vol.23 No.1
In high speed spindle system, it is very important to monitor the operation of the spindle to prevent catastrophic damage to the system. Widely used sensors for monitoring are eddy-current and Capacitive types. These sensors provide high accuracy of monitoring, but their steep prices lead to expensive high speed spindle system. The main goal of our research is to develop technology to produce high speed spindle system utilizing magnetic bearings. As active magnetic bearings require position sensors for feedback control, a noncontact position sensor is being developed as a part of this main goal. Once developed, it will contribute to affordable high speed spindle system. In this paper, we report the selection process of the sensor types and the experimental results with driving circuits.
소형 중경제초기의 제초날 및 회전축 안전성을 위한 시뮬레이션 분석
김준희 ( Junhee Kim ),강석호 ( Seokho Kang ),우승민 ( Seungmin Woo ),두윰우예다니엘 ( Uyeh Daniel Dooyum ),김영수 ( Yeongsu Kim ),하유신 ( Yushin Ha ),홍동혁 ( Donghyuck Hong ) 한국농업기계학회 2020 한국농업기계학회 학술발표논문집 Vol.25 No.1
잡초는 논, 밭 등 경작지에서 작물의 양분 흡수를 방해하여 성장에 영향을 미치고 수확량을 감소시키는 요인 중 하나이다. 잡초 제거 방법에는 농약을 이용하는 방법이 있지만 최근 소비자들은 친환경 식품을 선호하고 있으며 환경오염의 피해도 심각하다. 따라서 물리적 제초방법인 예초기, 트랙터용 제초기 등을 이용하는 방법이 있지만, 고령화 및 여성화에 따른 물리적 제초작업의 편의성을 높일 수 있는 장비가 필요하다. 따라서 본 연구에서는 소형 중경제초기의 시제품을 제작하였으며, 제초날과 회전축의 시뮬레이션 입력 변수 값 산정을 위해 회전축에 스트레인게이지를 부착하여 토크 측정시험을 진행하였다. 측정 결과 최대 51.35 N·m의 토크가 발생되는 것으로 분석되었다. 제초날의 두께는 1.5 mm, 2 mm, 2.5 mm로 변경하며 ANSYS(ANSYS 16.2, Ansys Inc., USA) 소프트웨어를 이용하여 제초날이 받는 응력을 분석하였으며, 회전축의 외경은 10 mm, 15 mm, 20 mm로 변경하며 RecurDyn(RecurDyn V8R5, FunctionBay, Rep. Korea) 소프트웨어를 이용하여 회전축이 받는 응력을 분석하였다. 제초날의 두께는 1.5 mm일 때 241.63 MPa, 2 mm일 때 167.22 MPa, 3 mm일 때 124.77 MPa을 받는 것으로 분석되어 제초날의 두께를 2 mm 이상으로 설계되어야 하는 것으로 분석되었다. 회전축은 외경이 10 mm일 때 253.61 MPa, 15 mm일 때 102.87 MPa, 20 mm일 때 50.86 MPa로 분석되어 회전축의 외경을 15 mm 이상으로 설계되어야 하는 것으로 분석되었다.