흔들의자의 양식 변천 연구(1) - 흔들의자의 이론적 배경과 윈저 Rocker 및 보스톤 Rocker의 양식 -

임승택,정우양,Lim, Seung-Taeg,Chung, Woo-Yang 한국가구학회 2006 한국가구학회지 Vol.17 No.2

This study understands rockers of today and supplies basic data of design and manufacture studying pattern change of rockers arisen in West, there is the purpose. Also, this study is investigated by dividing theoretical background of rockers, 7 kinds of American traditional rockers and European rockers from 18th century to opening part of 20th century and contemporary rockers since 20th century. The theoretical background and the style of 2 rockers (Windsor rocker, Boston rocker) were investigated to study the stylistic changes of rockers. Originally a rocker was invented by a European farmer around 1700. It developed to a household which equip practicality and comfortablness in the United States than Europe. Early rockers in a primal form appeared in the 1740s in the United States. American early rockers connected skate to established chair bridge. Rockers are deep connection with family's emotion. Rockers can provide playing functions for children and medically treating functions for adults. Windsor Rockers developed by attaching skate is mammy bench and according to shape of back form bow or hoop-back rocker, birdcage rocker, comb-back rocker. Windsor Rockers formed peculiar American tradition of craftsman furniture through structure that have a unique back of a chair and round seat. Boston Rockers were the first chairs made by mass production method. They show a particular shape with S-curve style seat and rectangular crest at the upper part of the back. Often Crests were decorated by stenciled pattern with curled leaves such as rosettes and scrolled designs.

흔들의자의 양식 변천 연구(2) -쉐이커rocker, 위커 rocker, 플랫폼 rocker 양식을 중심으로-

임승택,정우양,Lim, Seung-Taeg,Chung, Woo-Yang 한국가구학회 2006 한국가구학회지 Vol.17 No.3

These series articles were written in order to understand rockers of today and to provide basic data of their designs and manufacture studying pattern changes in the West. In the first article of the series reports we already described the theoretical background of rockers and the Windsor and the Boston style among the American classic rockers from the eighteenth to the twentieth century. This article contained the characteristics of the styles of the Shaker rocker, the Wicker rocker, and the Platform rocker. The three periods associated with furnituremaking in the Shaker sect are; the Primitive Era, which lasted from 1790 to 1820; the Classical Era, from 1820 to 1860; and the Final Phase, from 1860 to 1935. The important skills the Shaker needed to make the Shaker rocker are woodturning joinery, seat braid weaving and steam bending for the slats. The Wicker rocker continues to be extremely popular furniture style as the wicker proved equally effective for translating the ornate vine-like motifs popular among Art Nouveau proponents. The Wicker rockers were developed for child's, gentleman's and lady's, and it represents the most diverse forms among the above mentioned styles. However the rocker skates were often clumsy and took up too much room, preventing the chair from being shoved close to the wall and out of the way. These problems were overcome by the Platform rocker. The most important innovation was the technical development of a stationary base, which allowed the chair to rock noiselessly, without skating along the floor. The Modernism of the modern furnitures in America and Europe were affected by the characteristics of the Shaker rocker, the Wicker rocker, and the Platform rocker.

무변압기형 인버터를 사용한 비접지 태양광시스템에서의 GPT 영향 분석 연구

임승택(Seung-Taek Lim),임용배(Young-Bae Lim),김동우(Dong-Woo Kim),이기연(Ki-Yeon Lee),채동주(Dong-Ju Chae),문재현(Jae-Hyeon Moon),임대식(Dae-Sik Lim) 대한전기학회 2020 대한전기학회 학술대회 논문집 Vol.2020 No.7

vitakka(尋) 개념의 수행론적 의의에 대한 고찰

임승택(Lim Seung-Taek) 불교학연구회 2005 불교학연구 Vol.12 No.-

The usages of vitakka have both positive and negative aspects in Nik?yas. This concept, vitakka, contains our general thinking such as delusion, reasoning. Furthermore, it does not only cover the process of meditative practice but also the wisdom which comes from this meditative practice. In this paper, I say that we can understand the various examples of vitakka coherently when we focus on vac?sa?kh?ra, its linguistic function. Through the illumination of vitakka, I try to show an unique aspect of the buddhist practical theory. Vitakka always appears in the Nik?yas which is related with vipassan? practice. And it functions constantly in the first jh?na, that is, the lowest stage of samatha. Therefore we can say that the concept of vitakka becomes the basis of the theory that samatha and vipassan? can be practiced at the same time. As a result, I come to the conclusion that it is possible to insight the truth even in the lowest stage of samatha or the concentration.

해수유량변화에 따른 MW급 해수온도차발전시스템의 성능변화 동적 시뮬레이션

임승택(Seung-Taek Lim),김현주(Hyeon-Ju Kim),이호생(Ho-saeng Lee) 한국동력기계공학회 2019 동력시스템공학회지 Vol.23 No.1

배전계통에 초전도한류기 적용시 전압요소를 이용한 과전류계전기 정정 연구

임승택(Seung-Taek Lim),임성훈(Sung-Hun Lim) 대한전기학회 2018 전기학회논문지 Vol.67 No.12

In south korea, the government make a plan to generate the 20% of the total electrical power as renewable source like wind generation and solar generation. This plan will accelerate the increase of fault current with power industry’s growth. As the increase of fault current, the superconducting fault current limiter (SFCL) has been studied. In case that the SFCL is applied in power system, it can cause the overcurrent relay (OCR)’s trip delay because of the reduced fault current. In this paper, the overcurrent relay with voltage component was suggested to improve the OCR’s trip delay caused by the SFCL and compensational constant was introduced to have the trip time similar to the trip time of case without the SFCL. For conforming the effect of the suggested OCR with voltage component, the PSCAD/EMTDC simulation modeling and analysis were conducted. Through the simulation, it was conformed that the trip delay could be improved by using the suggested OCR and compensational constant.

분산전원이 도입된 배전계통에 초전도한류기 적용에 따른 과전류계전기 동작향상 연구

임승택(Seung-Taek Lim),임성훈(Sung-Hun Lim) 대한전기학회 2017 전기학회논문지 Vol.66 No.2

Due to the introduction of various types of dispersed generations (DGs) with larger capacity in a power distribution system, the short-circuit current is expected to be increased, which more requires for the effective fault current limiting methods. As one of the promising countermeasures, the superconducting fault current limiter (SFCL) has been noticed. However, the decreased fault current by SFCL affects the operation of the overcurrent relay (OCR), representative protective device in a power distribution system. In this paper, the operation of the overcurrent relay due to the application of a SFCL in a power distribution system with DG linked by its bus line was analysed through the short-circuit tests. To analyze the effect of the SFCL application in a power distribution system with DG, the experimental simulated circuits were designed and the short-circuit tests for the power distributed system assembled with the DG, the OCR and the SFCL were carried out. Through the analysis on the short-circuit tests, the application of the SFCL in a power distribution system with DG could be confirmed to be contributed to the operational improvement of overcurrent relay.

해수온도차발전 배출 심층수를 활용한 다단복합양식 에너지 수지분석

임승택(Seungtaek Lim),최미연(Miyeon Choi),문덕수(Deoksoo Moon) 한국해양환경·에너지학회 2021 한국해양환경·에너지학회 학술대회논문집 Vol.2021 No.10

본 논문에 경우 해수온도차발전에서 열침으로 활용 후 배출되는 심층해수를 활용하여 다단의 복합양식 시스템을 구축하였으며, 부족한 열원은 해수열원 히트펌프를 적용하여 열에너지를 보완하였다. 연간 운전 특성을 비교하여 표층해수와 심층해수를 이용한 저온 생물 생장에 필용한 에너지 및 비용 변화를 분석하였다. 이때 저온 열원의 경우 수심 500m 이하의 5℃ 심층수와 해수온도차발전에 활용하고 배출되는 7℃의 심층수를 비교하였으며, 표층수의 경우 연간 동해안의 온도 변화를 적용하였다. 미역양식 수조에 공급되는 해수의 유량은 20톤/day이며, 미역양식 수조에서 배출되는 배출수는 약 3℃가량 온도가 상승하여 연어 양식 수조에 공급된다. 이후 연어양식 수조에서 배출되는 13℃의 배출수는 75%가량 해삼양식 수조에 공급되나 25%는 해상으로 배출된다. 해삼양식 수조에서 최종 배출되는 15℃의 배출수는 연어 양식에서 배출되는 배출수와 혼합되어 14.5℃로 해수히트펌프의 열원으로 활용된다. In this paper, a multi-stage complex aquaculture system was constructed using deep seawater discharged after using it as a heat sink in OTEC(Ocean Thermal Energy Conversion). By comparing the annual operating characteristics, changes in energy and cost required for low-temperature growth using surface seawater and deep seawater were analyzed. At this time, in the case of a low-temperature heat source, 5℃ deep water with a depth of 500m or less was compared with 7℃ deep water used for power generation and discharged. In the case of surface water, the annual temperature change of the east coast was applied. The flow rate of seawater supplied to the seaweed culture tank is 20 tons/day, and the temperature of the discharged water discharged from the seaweed culture tank rises by about 3℃ and is supplied to the salmon culture tank. After that, 75% of the 13℃ water discharged from the salmon farming tank is supplied to the sea cucumber culture tank, but 25% is discharged to the sea. The 15℃ discharge water finally discharged from the sea cucumber culture tank is mixed with the discharge water discharged from the salmon culture at 14.5℃ and is used as a heat source for the seawater heat pump.

비대칭열교환기를 적용한 해수온도차발전 성능변화 시뮬레이션

임승택(Seungtaek Lim),이호생(Hosaeng Lee),문정현(Junghyun Moon),김현주(Hyeonju Kim) 한국해양환경·에너지학회 2017 한국해양환경·에너지학회 학술대회논문집 Vol.2017 No.4

본 연구에서는 해수온도차에너지를 이용하는 해수온도차발전의 효율 증대를 위하여 비대칭 열교환기를 적용하였으며, 1MK급 해수온도차발전 플랜트의 증발기와 응축기 해수측 유로의 증가를 통한 압력강하를 저감을 5%에서 최대 30%를 적용하여 해수 펌프의 동력 감소를 비교하는 시뮬레이션을 수행하였다. 해수온도차발전은 폐회로 사이클을 적용하였으며, 사용된 냉매로는 R32를 적용하였다. 열역학적 사이클의 모사를 위하여 Aspen HYSYS(V8.8)를 이용하여 해석을 진행하였으며, 냉매측과 해수측의 압력강하 발생에 따른 발전시스템 성능변화를 확인 하였다. 비대칭 열교환기를 적용한 해수온도차발전 사이클의 경우 심층수펌프와 표층수펌프의 소요 동력이 기존 대칭형 열교환기와 비교하여 감소하였으며, 냉매펌프의 경우 약간의 증가를 보였다. 1MW급 해수온도차발전시스템에 적용하였을 경우 기존 발전 성능과 비교하여 펌프 출력감소로 인한 순수출력 증가와 시스템 효율 증가를 확인하였다. In this research, the effect of using asymmetric heat exchanger on the efficiency of closed-cycle OTEC system is simulated. The range of pressure drop for the seawater flow is determined to be from 5% to 30% and R32 is chosen for the refrigerant. Such simulation was performed by comparing the power reduction of the seawater pump. Performance analysis was simulated by using the Aspen HYSYS. The performance changes of the power generation system due to the pressure drop on the refrigerant side and seawater side sere confirmed. In case of asymmetric heat exchanger, the required power for the deep water pump and the surface water pump was decreased compared to the conventional symmetric heat exchanger. The refrigerant pump showed a slight increase in its power consumption. Applied to 1MW OTEC system, the net power and the system efficiency were increased due to the decrease of the pump power compared to the existing power generation performance.

죽음의 문제에 대한 고찰

임승택(Seung Teak Lim) 동국대학교 불교문화연구원 2005 佛敎學報 Vol.- No.43