ON/OFF 제어방식 오일쿨러의 정밀온도 제어에 관한 연구

이상윤,Lee, Sang-Yun 한국융합신호처리학회 2013 융합신호처리학회 논문지 (JISPS) Vol.14 No.2

Recently, the needs of system performances such as working speed and processing accuracy in machine tools have been increased. Especially, the working speed increment generates harmful heat at both moving part of the machine tools and handicrafts. The heat is a main drawback to progress accuracy of the processing. Hence, a oil cooler to control temperature is inevitable for the machine tools. In general, two representative control schemes, hot-gas bypass and variable speed control of a compressor, have been adopted in the oil cooler system. In this paper, the compressor's speed are controlled to keep reference value of temperature at oil outlet. The precision processing of a machine tool is required for an oil cooler guaranteeing ${\pm}0.1^{\circ}C$ temperature control. But the oil cooler with precision temperature control is expensive. Therefore in this paper, instead of a on/off(relay) control method, a PID and phase angle electric power control method is proposed for the precision control of an oil cooler. The proposed controller is implemented and tested at the temperature of $23^{\circ}C$, $24^{\circ}C$ and $25^{\circ}C$.

저가형 대기전력 차단장치 개발

이상윤,Lee, Sang-Yun 한국융합신호처리학회 2015 융합신호처리학회 논문지 (JISPS) Vol.16 No.3

A device which could cut off the consumption of standby power by electric or electronic devices at homes and offices while waiting for a command to carry out the main functions from the inside or the outside was developed at a low price. Efforts to save standby power have been made on a global scale as well as by advanced countries. The consumption of standby power in South Korea is also increasing gradually due to increasing trend in the number of electronic and electric devices per household, becoming a major factor for waste of electric energy. The previous standby power cutoff devices themselves have high electric energy consumption and complicated structures, making the purpose less meaningful. Therefore, a low-priced standby power cutoff device is suggested in this study, which compensates such problems and cuts off the consumption of standby power completely. The circuit of the suggested standby power cutoff device was designed and implemented by applying it to an earth leakage breaker and an (electrical) outlet. Experimental results show its superiority.

최소침습수술용 의료로봇 기술개발연구 - 시나리오플래닝을 적용하여 -

이상윤,윤홍주,Lee, Sang-Yun,Yoon, Hong-Joo 한국전자통신학회 2013 한국전자통신학회 논문지 Vol.8 No.1

This study is about development of technology system for MIS(Minimally Invasive Surgery) robot of S. Korea analysed by the application of scenario planning. MIS robot industry receive attention as a new growth industry for national and international and is noticeable for the leading industry of future era in Korea. In this paper was examined the characteristics of an MIS robot technology and its components. It was investigated about the technology of an overseas MIS robot(especially U.S.A) and Korean domestic MIS robot and understood such as the country's policy propulsion issues then, was searched about development direction of the future. As a result, the future policy for MIS robot of S. Korea is to further spur the development of new MIS robot technology and more improvement of the technology level of MIS robot with AR(Augmented Reality) display.

풍하중에 의한 손상해석을 이용한 기하형상에 따른 자연 습식 냉각탑의 구조성능 평가 - Part II : Two-Shell 기하형상

이상윤,노삼영,Lee, Sang-Yun,Noh, Sam-Young 한국공간구조학회 2017 한국공간구조학회지 Vol.17 No.1

The result of the previous work leads to the idea that the inner area of the hyperbolic shell generator should be minimized for the cooling tower with higher first natural frequency. In this study the inner area of the hyperbolic shell generator was graphically established under varying height of the throat and angle of the base lintel. From the graph, several shell geometries were selected and analysed in the aspect of the natural frequency. Three representative towers reinforced differently due to different first natural frequencies were analysed non-linearly and evaluated using a damage indicator based on the change of natural frequencies. The results demonstrated that the damage behaviour of the tower reinforced higher due to a lower first natural frequency was not necessarily advantageous than the others.

유비쿼터스 스마트 도시와 행정공간정보화 연구 - 부산 센텀시티 중심으로 -

이상윤,윤홍주,Lee, Sang-Yun,Yoon, Hong-Joo 한국전자통신학회 2016 한국전자통신학회 논문지 Vol.11 No.4

In recent years, our society, because of the arrival of a new paradigm according to the rapid changes in ICT has entered into future smart society and the ubiquitous era. So it can be a notable turning point in the city and administrative spatial informatization, aspects of the era change. Therefore, this study was to derive a desirable vision for the city of Busan Centum City Informatization in the dream of leading global smart city of Busan by applying 'scenario planning' as a foresight method. Soon this study derived a successful local informatization strategy for Centum City in Busan. It proposed the use of the administrative aspects of information with spatial informatization as metadata information. Also this study explored the future leadership strategy of Busan Centum City in smart society. Eventually in 2030 to around, In order to still remain Busan Centum City as a leading ICT smart city, this study suggested the following strategy. It is important to increase the satisfaction of citizen services through the use of the administrative aspects of information with spatial informatization as metadata information for urban information system.

한국 전자정부와 클라우드 컴퓨팅 기술개발연구 - 시나리오플래닝을 적용하여 -

이상윤,윤홍주,Lee, Sang-Yun,Yoon, Hong-Joo 한국전자통신학회 2012 한국전자통신학회 논문지 Vol.7 No.6

This study is about development of technology for electronic government of S. Korea with cloud computing analysed by the application of scenario planning. As a society of knowledge and information has been developed rapidly, because of changing from web environment to ubiquitous environment, a lot of countries across the world as well as S. Korea for e-Government have a variety of changes with cloud computing service. So this research focused on the strategy consulting of e-Government of S. Korea with development of cloud computing technology analysed by the application of 'scenario planning' as a foresight method. As a result, the future policy for development of cloud computing technology for electronic government of S. Korea is to further spur the development of technology for hard ware and internet data center as SLA(Service Level Agreement) and service provisioning, more improvement of level of technology with soft ware solution as resource virtualization, open API(Application Programming Interface).

표준화 위원회 탐방 - 공공안전통신 프로젝트 그룹(PG902)

이상윤,Lee, Sang-Yun 한국정보통신기술협회 2014 TTA저널 Vol.156 No.-

스마트건설 - 교량 건설 현장의 원격제어로봇 적용

이상윤,Lee, Sang-Yun 한국전산구조공학회 2020 전산구조공학 Vol.33 No.3

발열을 동반한 호중구감소 상태의 급성백혈병 환아에서 경험적 항진균제로 투여한 Amphotericin B와 Itraconazole의 효과와 이상 반응 비교

이상윤,박종선,김선영,양금진,박경덕,김학기,Lee, Sang-Yun,Park, Jong-Sun,Kim, Sun-Young,Yang, Keum-Jin,Park, Kyung-Deok,Kim, Hack-Ki 대한소아감염학회 2005 Pediatric Infection and Vaccine Vol.12 No.1

Purpose : Fungal infection is one of the important causes of morbidity and mortality in patients with hematologic malignancies. Amphotericin B(ABV) and itraconazole(ITZA) have been used as the standard empirical antifungal therapy in neutropenic patients with acute leukemia who have persistent fever that does not respond to antibiotic therapy. ABV is an antifungal drug associated with side effects such as fever and chills, symptoms which may be mediated by pro-inflammatory cytokines such as interleukin-$1{\beta}$(IL-$1{\beta}$) and tumor necrosis factor-${\alpha}$(TNF-${\alpha}$). We assessed modulation of these pro-inflammatory cytokines as well as the anti-inflammatory cytokines(IL-4, IL-1Ra) by ABV and ITZA. Methods : From March 2004 to February 2005, a total of 30 episodes from acute leukemia patients with febrile neutropenia were analyzed for this study. They were randomly allocated to receive intravenous ABV or ITZA for 14 days. Clinical responses were evaluated at the completion of therapy, and cytokine IL-$1{\beta}$, TNF-${\alpha}$, IL-4, and IL-1Ra were measured for determination to know the correlation between two antifungal agents and inflammatory cytokines. Results : Empirical antifungal agents were given to 37 patients(ABV 20, ITZA 17), and 30 patients(ABV 15, ITZA 15) were evaluable for efficacy. White blood cell and absolute neutrophil count in the group treated with ITZA increased early days of treatment, so the duration of neutropenia in ITZA group is shorter. Serum creatinine level is lower in ITZA group than in ABV group but this is not statistically significant. There was no significant difference in response rate between two groups. The IL-$1{\beta}$ was increased in ABV treatment group and the ratio of IL-1Ra/IL-$1{\beta}$ is markedly decreased in ABV treatment group while increased in ITZA group. Conclusion : ITZA and ABV have at least equivalent efficacy as empirical antifungal therapy in neutropenic children with acute leukemia. However ITZA is associated with significantly less toxicity in clinical and molecular aspects.

기업과 보건관리

이상윤,Lee, Sang-Yun 대한산업보건협회 1985 산업보건소식 Vol.24 No.-