• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.392-392
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• 2000

This study performs optimization of paper mill scheduling using MINLP(Mixed-Integer Non-Linear Programming) method and 2-step decomposing strategy. Paper mill process is normally composed of five units: paper machine, coater, rewinder, sheet cutter and roll wrapper/ream wrapper. Various kinds of papers are produced through these units. The bottleneck of this process is how to cut product papers efficiently from raw paper reel and this is called trim loss problem or cutting stock problem. As the trim must be burned or recycled through energy consumption, minimizing quantity of the trim is important. To minimize it, the trim loss problem is mathematically formulated in MINLP form of minimizing cutting patterns and trim as well as satisfying customer's elder. The MINLP form of the problem includes bilinearity causing non-linearity and non-convexity. Bilinearity is eliminated by parameterization of one variable and the MINLP form is decomposed to MILP(Mixed-Integer Linear programming) form. And the MILP problem is optimized by means of the optimization package. Thus trim loss problem is efficiently minimized by this 2-step optimization method.

• 한국기계가공학회지
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• 제14권1호
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• pp.29-35
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• 2015

In this study, a FEM analysis is undertaken of a rubber sleeve which is mounted onto a spreading mandrel so as to avoid marking the first wrappings of coils (known as the 'end-mark'), as occasionally occurs when a concentrated load is placed on the edge of a steel sheet, significantly reducing its quality. A commercial numerical package, ANSYS, was utilized to analyze the structural behavior of the rubber sleeve. In general, the strain of the sleeve increases as the thickness of the rubber layer (H) covering the tubes increases, thus also increasing the surface of the sleeve for a constant boundary condition, and decreasing the pitch (P) between each tube, resulting in an increase in the strain on the surface of the sleeve for all rubber thickness conditions tested here. In a comparison of two different materials, rubber and urethane, when H=3 mm and P=1.1D, the maximum total deformations in these cases are 0.12669 mm and 0.086623 mm, respectively.

• 한국농촌건축학회논문집
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• 제10권4호
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• pp.25-32
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• 2008

The prevention of disasters in cultural property is very important management and historical duties. The reason can't be measured values with monetary scale of our contemporary. Therefore, this paper was considered fire-safety as one of terrible threat-disasters about the wooden buildings. This research deal with 47 cases cultural property wooden building by whole investigation(field survey and interview) in Gangnung province. The most buildings have basic fire extinguisher; ABC powder. A few buildings are rarely installed fire extinguishing equipments; outdoor fire hydrant, heat sensor, ground sprinkler, CO2-hose-reel. But these state is very insufficient for the fire-safety in cultural property wooden buildings. Specially as particular attention in province, forest fire of regional characteristic have close relation with cultural property fire. The majority of factor against forest and building fire is to provide monitoring and security system; CCTV, Fence, Sensor, Alarm and paid guard man against incendiary. Ultimately it is necessary to construct comprehensive disaster prevention system with the organic cooperation such as National Emergency Management Agency, Cultural Heritage Administration, Forest Service, local government officials and regional citizen.

• Current Optics and Photonics
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• 제1권5호
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• pp.468-473
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• 2017

We determined the feasibility of a fishing camera system using an optical fiber as the fishing line by testing a power-over-fiber (POF) module and multimode optical fiber. Operation of the remote camera module (RCM) without the battery was preferred because the removal of the charging or battery replacement section enabled a waterproof single-body type design. The average efficiency of the photovoltaic power converter (PPC) in the tested POF module was 32.6% at 820 nm, and thus, a high-power laser of at least 1.27 W was required for operating the developed RCM with an electrical dissipation of 413 mW. Because the optical fiber was wound on a fishing reel, composite loss composed of bending and tensile loss occurred. To mitigate the composite loss, we employed a simple holder that showed an improvement in the composite loss of 0.38 dB to 0.8 dB, which was considerably better than the losses without the holder.

• 한국기계가공학회지
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• 제20권6호
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• pp.108-113
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• 2021

Recently, a new concept of a one-touch descending lifeline has been proposed to address the drawbacks of the conventional descending lifeline, which can be easily installed and quickly evacuated in the case of a fire emergency. All separate parts for escape are initially mounted in a box, and the link-type support is spread out of the window by pushing the handle attached to the box. In this study, the proposed double square linkage mechanism was redesigned, and its safety is verified by determining an appropriate moment of inertia of the link through finite element analysis using Abaqus. The shape and assembling method of the reel and speed controller were also modified such that the safety belt was simultaneously unfolded with link-type support. Finally, the feasibility of the proposed one-touch all-in-one descending lifeline was confirmed through fabrication.

• 한국조경학회지
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• 제31권1호
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• pp.66-77
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• 2003

The purpose of this study is to propose a standard putting green management program to prepare fast green suitable for international golf tournaments, and to conform whether the reported green speed model can be applied to the real field situations. The west course of Lakeside Country Club was selected for the case study. This study was initiated on August 1st, 2001 and continued through October 4th, 2001. The results are summarized as follows: 1. Following the long-term schedule, 'penncross' creeping bentgrass turf was mowed at 5.0mm(37days), 4.5mm(8days), 4.0mm(4days), 3.5mm(2days), 3.2mm(2days), 3.0mm(2days), 2.8mm(2days) and the mowing direction was changed daily. Variation of mowing height was reduced to a minimum range. Core aerification with deep tines was applied 19 days prior to the first practice round. Dry sand maintenance was top-dressed 2 times at 1.5mm/$m^2$ on the 17th day and 1.0mm/$m^2$ on the 10th day. Minimum irrigation was applied to keep the turf alive. During the tournament preparation week, dew on the putting greens was removed by using a sponge roller. Following the dew removal, the greens were cut once each morning at a height of 2.8mm. The mower used was the 21 inch working behind mower equipped with a tournament bedknife and 11 reel blades. Following the mowing, the peens were rolled with a light-weight roller in one direction in the morning. Rolling was used as a finishing technique to ensure that the surface was as smooth as possible, and to provide true ball roll and maximum green speed. In conclusion these management practices satisfied the daily green stimpmeter readings required for USGA championship play. 2. During the period of tournament preparation, no damage was observed on the green, but scalping in green edge appeared in about 0.39% of the total area of 18 greens in the west course.

• 한국잠사곤충학회지
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• 제18권2호
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• pp.107-110
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• 1976

In silk reeling process the carry-over cocoons must be submerged in the reeling baths filled with reeling water and left until reopening the operation. Under the detention the carry-over cocoons are apt to decay without any antiseptic treatment. Thus an useful antiseptic for the cocoons is urgently needed, and various antseptic agents have been tested for their applicability to the process. However, such an useful agent has not been developed yet. Formalin has been the only chemical used for antisepticizing carry-over cocoons, although it has many defects as the antiseptic for the cocoons. In these circumstances, recently we newly prepared an antiseptic useful for preventing the carryover cocoons from decaying. We named the new antiseptic preparation "Swi-Se-Yo." The Korean term "Swi-Se-Yo" literally means "please take a rest". Through a series of experiments with Swi-Se-Yo we obtained the following results: 1) Swi-Se-Yo, in 0.05% aqueous solution, exerted a good antiseptic effect on the boiled Cocoons submerged in the reeling baths and the effect lasted for 45 hours. The duration of the effect is about two times longer than that of Formalin. 2) The percentage of cocoon reel ability of the carry-over cocoons treated with Swi-Se-Yo was 6% higher than that of Formalin and was equal to that of flowing cold water. 3) The percentage of raw silk yield of the carry-over cocoons treated with Swi-Se-Yo was almost equal to that of Formalin and to that of flowing cold water. 4) The quality of raw silk of the carry-over cocoons treated with Swi-Se-Yo is the same as that of flowing cold water. Besides the above favourable results, Swi-Se-Yo has many advantages as an antiseptic. Chemically it is very stable. Its antimicrobial action is very strong and the spectrum is very broad. It can be available in water-soluble powder and in small bulk. And it is not harmful to human and domestic animals. Considering these profitable properties of Swi-Se-Yo, it will have a good reputation as a carry-over cocoon antiseptic. (The chemical composition and manufacturing method of Swi-Se-Yo will be published in the near future.)

• 한국의상디자인학회지
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• 제14권1호
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• pp.31-42
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• 2012

This study focuses on the establishment of the medical practitioners' brand image through uniforms design developments and the need for recognition, which follows the globalization and evolution of the medical industry. It also embodies public healthcare management services, as well as works to develop a unified design for nurse uniforms at the Gyeonggi provincial medical center in order to place it as a foothold hospital in the region. The results of the study are as follows: First, the symbols of nurse uniforms were divided into external and internal definitions. However, when comparing the uniforms of university hospitals and Gyeonggi provincial medical center, the nurses of the Gyeonggi provincial medical center preferred a uniform that had a strong symbolic meaning. Second, the functionality of nurse uniforms included management of uniforms, sewing, and measurements as important elements. Also, it was found that medical center nurses prefer materials with high functionality. Third, the aesthetics of nurse uniforms and decoration, which includes the external shape and popular influences, were displayed. Also, medical center nurses have a higher preference in external aesthetics than university hospital employees. The results of this study were used as the basis for the development of the design for the Gyeonggi provincial medical center nurse uniforms, which are as follows. First, in terms of symbolism, active application of the Gyeonggi provincial medical center's brand image and medical practitioners such as the Gyeonggi provincial medical center's logo were applied to establish a unified image. Second, in terms of functionality, consideration of the special working conditions and activities were taken into place through the use of functional materials and details to create superior application and efficient work performance. Third, in terms of beauty, bright and neat colors as well as pleasantries were emphasized to create a professional image that will reel in confidence from the patients.

• 재활복지공학회논문지
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• 제10권4호
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• pp.315-320
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• 2016

본 연구에서는 사용자 본인(선수)의 일렉트릭 소드 및 커넥터를 활용하여 훈련이 가능한 Plug&Play 방식의 실시간 펜싱 반응시간 측정장치를 개발하였다. 측정장치는 훈련인형의 상체 뒤쪽에 봉을 통해 연결 배치하여 회전이 가능하도록 하였으며, 인형몸체와 헬멧, 측정장치, 릴 신호연결부 선수의 일렉트릭 소드 및 커넥터가 폐회로를 구성하여 동작하도록 개발하였다. 측정장치는 랜덤 신호(빛, 소리)를 제시한 후 공격이 이루어질 때까지의 반응시간을 측정하여 실시간으로 선수에게 제공하게 된다. 대표팀 코치 및 선수의 파일럿 테스트 및 피드백을 통해 개발된 시스템의 유용성을 확인하고자 하였다.

• 한국광학회지
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• 제8권2호
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• pp.134-141
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• 1997

기존의 .lambda.=1.31.mu.m에서 분산 최적화된 광통신시스템을 .lambda.=1.55.mu.m 광전송시스템으로 향상시키는데 필요한 분산보상 단일모드 광섬유(DCF)를 설계하였다. 총분산이 .lambda.=1.55.mu.m에서 큰 마이너스 분산치를 갖는 굴절율 분포를 얻기 위해 포물선 분포-이중클래드 광섬유의 분산특성을 해석하였다. 광섬유 스칼라 파동방정식으로부터 분산특성을 얻기 위해 1차원 유한요소법을 적용하였다. Reel에 감긴 DCF의 macro-bending에 의한 손실을 적절히 제한하기 위해, L $P_{01}$모드의 차단 파장이 .lambda.=1.80.mu.m이상이 되도록 설계하였다. 이 조건에 맞는 굴절율분포의 .lambda.=1.55.mu.m에서 분산의 하한치는 약 -120 ps/nm.km정도로 제한됨을 볼 수 있었다.다.