• Journal of Korean Neurosurgical Society
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• 제30권8호
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• pp.981-984
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• 2001

Object : To treat hydrocephalus by ventriculo-peritoneal shunt operation, the correct positioning of the proximal catheter in the ventricle is very important. The purpose of this study was to develop the "shunt guiding kit" for the proper positioning of the proximal shunt catheter to the ventricle in the ventriculo-peritoneal shunt operation. Materials and Methods: The "shunt guiding kit" is made of tungsten alloy and it consists of one frame, two screws and one guider. Through the guider, the proximal shunt catheter operates by mechanically coupling the posterior burr hole to the anterior target point. Results: We have treated three hydrocephalus patients with use of the "shunt guiding kit", and achieved good location of proximal shunt catheters. Conclusion: We developed the "shunt guiding kit" for the proper positioning of the proximal shunt catheter to the ventricle, and this would be very useful for preventing ventriculo-peritoneal shunt malfunction and preventing possible brain injury during the procedures.

• 한국도로학회논문집
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• 제8권4호
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• pp.37-47
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• 2006

도로상에서 운전자에게 길안내 역할을 하는 도로표지는 운전자가 자신이 원하는 목적지를 쉽고 정확하게 찾을 수 있도록 설계되고 설치되어야 하며, 이는 도로이용자의 도로이용 효율성 및 교통 안전성 향상을 위해 충분히 고려되어야 한다. 현재 우리나라에서 사용하고 있는 도로표지 경로안내방식은 점개념 안내방식이며, 도시부에서는 부분적으로 선개념 안내방식을 도입하고 있으나 안내지명 선정방법에 대한 기준이 미흡하고, 도로의 기능별 안내지명선정 및 지역적 특성을 감안한 안내지명 선정에 대한 구체적인 기준이 없어 안내지명간의 전체적인 연계성이 결여되는 문제점이 나타나고 있다. 따라서 본 연구에서는 현 도로표지규정집에서 규정하고 있는 도로표지 안내지명 선정기준을 재검토하여 특정 구간(지역)에서의 안내지명 선정방법 및 연계성을 확보하는 과정에서 발생할 수 있는 문제점을 다각적으로 분석해 보고, 도로의 기능별 및 지역적 특성을 감안한 안내지면 선정방법을 도출하는 것을 목적으로 한다.

• 천문학회보
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• 제39권2호
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• pp.92.1-92.1
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• 2014

In astronomical spectroscopy, stable auto-guiding and accurate target centering capabilities are critical to increase the achievement of high observation efficiency and sensitivity. We developed an instrument control software for the Immersion GRating INfrared Spectrograph (IGRINS), a high spectral resolution near-infrared slit spectrograph with (R=40,000). IGRINS is currently installed on the McDonald 2.7 m telescope in Texas, USA. We had successful commissioning observations in March, May, and July of 2014. The role of the IGRINS slit-viewing camera (SVC) is to move the target onto the slit, and to provide feedback about the tracking offsets for the auto-guiding. For a point source, we guide the telescope with the target on the slit. While for an extended source, we use another a guide star in the field offset from the slit. Since the slit blocks the center of the point spread function, it is challenging to fit the Gaussian function to guide and center the target on slit. We developed several center finding algorithms, e.g., 2D-Gaussian Fitting, 1D-Gaussian Fitting, and Center Balancing methods. In this presentation, we show the results of auto-guiding performances with these algorithms.

• 대한전자공학회논문지SD
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• 제43권4호
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• pp.31-37
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• 2006

광 신호 제어 시스템에서 사용되는 광/안테나 연결회로의 제작 간소화에 대한 중요성이 지속적으로 대두되고 있다. 이를 위하여, 본 논문에서는 광섬유로 제작된 새로운 형태의 photonic 안테나 설계에서 광 도전 효과에 기인한 광섬유와 슬롯 결합형 마이크로 스트립 안테나 사이의 광 결합효율을 수치 해석적으로 분석하였다. 결합특성을 정확하게 분석하기 위하여 원통형, 평면형 전송구조들이 결합할 때 발생하는 불연속 특성을 포함한 새로운 모드 전송선로 이론을 정의하였다 분석결과, 서로 다른 두 전송구조에서의 최대 전력전송은 그 결합영역에서 전파하는 정확한 두 모드들의 전송전력이 균등하게 분배되는 새로운 지점에서 발생함을 보였다.

• 한국도서관정보학회지
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• 제21권
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• pp.195-229
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• 1994

This article investigates the normative principles suggested by Rangannathan as the guiding principles for his theories, consisting of basic laws, fundamental laws, canons, principles and postulates. His five basic laws and five laws of library science are re-interpreted from the view point of library classification. And three planes of idea plane, verbal plane and notational plane, one of the core ideas in his analytico-synthetic theory of library classification, are analyzed. This article also suggests the demonstration model for this three planes using the ideas from chemistry ad chemical equation. In the last part, it analyzes the canons for library classification of three planes. These normative principles are basically guiding principles for so-called analytico-synthetic or faceted classification. But they can be a n.0, pplied to most of modern classification. But they can be a n.0, pplied to most of modern classification schemes, especially to semi-enumerative schemes including DDC, KDC, etc. so that they can improve the schemes. From this regard, these principles can also be helpful to the KDC, on the verge of the revision of its fourth edition.

• 헤리티지:역사와 과학
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• 제57권3호
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• pp.162-182
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• 2024

세계유산협약이 채택된 이후 지난 50여 년간 어두운 역사와 관련된 장소들이 세계유산으로 등재되어 왔다. 그러나 2018년 이러한 유산들의 세계유산 등재가 불러올 수 있는 추가적인 불편함이나 갈등을 방지하고자 해당 유산들의 세계유산 등재신청서 검토를 일시적으로 중단했다. 이후 전문가들은 이러한 유산의 세계유산 등재에 대해 우려를 표명했지만, 협약가입국들의 요구가 늘어나면서 갈등기억유산지침원칙이 채택되었고, 이를 통해 갈등기억유산의 세계유산 등재가 가능해졌다. 갈등기억유산지침원칙은 유산의 성격과 등재기준, 세계유산등재 신청서에 포함해야 하는 항목, 유산 가치에 대한 서로 다른 해석이 존재하는 경우 이의를 제기할 수 있는 메커니즘 등을 제시하여, 갈등기억유산 등재로 인한 또 다른 갈등을 최소화하고자 한다. 이 지침원칙은 갈등기억유산이 세계유산협약의 목적을 달성하는 데 기여할 수 있음을 확인하고, 유산 해석에 대한 전략을 처음으로 서술한 점에서 의의가 있다. 또한 이의제기 메커니즘을 운영하기 위해 운영지침을 개정하여 보다 투명하고 공개적인 유산 등재 절차를 마련한 것도 주목할 만한 성과이다. 그럼에도 불구하고 갈등기억 유산지침원칙에도 한계는 존재한다. 세계유산협약에서 정한 10가지 등재기준 중 갈등 혹은 어두운 역사, 기억과 관련된 기준인 등재기준 (vi)을 사용해야 한다는 전제조건이 있다. 이는 등재 신청국의 의도에 따라 등재기준 (vi)을 사용하지 않는다면 지침원칙의 활용을 기대할 수 없다는 의미이기도 하다. 이외에도 갈등기억유산 등재신청서에 해석 전략을 수립하도록 규정하고 있으나 구체적인 지침이나 안내가 없어 등재신청국의 혼란이 우려되는 상황이기도 하다. 갈등기억유산은 과거의 어두운 역사가 물리적 장소와 연결되어 보호하고 기억해야 하는 곳으로 인식되지만, 점차 화해와 치유의 장소로 그 역할을 확장해왔다. 갈등기억유산의 세계유산 등재는 화해와 치유의 장소이자, 갈등에서 비롯한 사회 구조가 현대 사회에 미치는 영향에 대해 논의할 수 있는 매개가 될 수 있다. 갈등기억유산지침원칙의 채택을 시작으로 세계유산이 된 갈등기억유산은 화해와 치유를 넘어 현재와 미래의 문제를 해결해 나가는 계기가 되길 기대한다.

• 수산경영론집
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• 제14권1호
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• pp.1-18
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• 1983

This study has examined the principle of rationalization as a guiding principle in fisheries management. Generally speaking, the guiding principle of business management is the principle of profitability which is oriented to the profit maximization, but it has been insisted by Dr, Mohri that the principle of profitability should be translated into the maximization of ratio of added value on gross capital, According to Dr. Durcker, added value (contributed value) can be used to analyze productivity only if the allocation of costs which together make up the figures is economically meaningful. Therefore, the rationalization of fisheries management can be measured as a result of economic allocation of costs, The analysis of economic allocation of costs divides into macro-allocation of costs and micro-allocation of costs. In fisheries management, the former makes use of the analysis of break-even point, and the latter analyzes the efficiency of individual cost respectively and the state of division of costs which allocate into above-the-line expenses of lay system and management's burden expenses. In macro-allocation of costs, it is advisable that fixed costs be converted into variable costs. This is characteristically possible in fisheries management, because wages belong to variable costs in fisheries management while they are regarde as fixed cost in the other industires. Because we could find that all costs would belong to above-the-line expenses, in micro-allocation analysis, the very costs which are directly related to fisherman's poduction activity should be classified into above-the-line expenses, and the other costs into management's burden expenses. This is a central problem in the rationalization of fisheries management.

• Journal of Biosystems Engineering
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• 제24권3호
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• pp.209-216
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• 1999

A self-travelling sprayer was developed to avoid the exposure of an operator to agricultural chemicals and exhaust gas, to improve safety and to increase working efficiency during the application and transport work in the greenhouses. This system consists of self-travelling system and the control system for application and safety device. The auto-spray car is equipped with a liquid chemical tank of 80l capacity. The travelling system adopted mechanical steering system which link mechanism of front wheel is guided by guide rollers. The sprayer travels along the guiding pipe which is set on the furrow in the greenhouses. The sprayer stops automatically applying and traveling when the liquid chemical tank becomes empty or when the sprayer reach the turning point. The spray booms swings in a vertical plane. The control system of safety devices controls the automatic stop of the sprayer when there is an obstacle on the traveling path, or when the battery becomes discharged. The auto-spray car traveled smoothly and steadily along the guide pipe during traveling straightly and turning on the ground.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2005년도 춘계학술발표대회 논문집
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• pp.217-222
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• 2005

The considerable increase of the elderly with dementia is expected annually and when we think about the family members' and the patients' suffering, it could be painful. Above all things, it imposes heavy economic burdens on the family members that have patients who suffer from diseases of age like dementia or paralysis that caring them at home and also, it is not desirable for those old people in point of physical or environmental circumstances for medical care. Thus, it is needed urgently that the expansion of specified facilities and improvement of services for these old people. Under this present condition, it is the special feature that the subject of research is people/facilities that offer services, not the elderly with dementia-the main user of those facilities. Thus, it is the time that we need various accessing plans that can grasp the patiences' activities and specialties and solve these problems in view of designing interior space. So, I tried to make designs that manage the elderly with dementia effectively and adequate to run facilities with considerations on the state of domestic specialized long-term care facilities for the elderly with dementia and researched guiding principles on physical healing surroundings with analysis that focused on the patients' activities, especially.

• Journal of Biosystems Engineering
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• 제13권2호
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• pp.9-17
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• 1988

This study was carried out to develop an agricultural robot for fruit harvesting. As the first step an experimental manipulator and its control system were constructed. The articulated manipulator driven by DC motors has 3 degrees-of-freedom. The manipulator has a gripper adequate for fruit harvesting and an upper arm which forms a kind of guiding channel so thai harvested fruit can pass through. Point-to-point control of joints are accomplished by a digital control system with a PID controller which consists of optical shaft encoders, power amplifiers using PWM, a microcomputer and a software. The microcomputer also computes the positions of manipulator and sequence of motions. The motion of the manipulator was to slow and rough that it would need further improvement.