• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.48 no.11
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• pp.935-943
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• 2020

This paper presents a methodology for evaluating suitability of a manned-unmanned aerial vehicle team for a complicated mission. The study identified vehicle performance, equipment performance and level of autonomy as the key factors that affect the mission effectiveness. A manned and an unmanned aircraft were compared, and their performance was quantized in these respects. SEAD was chosen as a representative manned-unmanned team mission. The SEAD mission was broken down to a sequence of tasks. Mission experts evaluated the importance of each mark item for the mission legs. Combining the results showed proper type of aircraft for each leg depending on the complexity, safety, and importance of the task. Finally, the whole mission plan was laid out as a time-based sequence which alleviate pilot workload significantly.

• Journal of Aerospace System Engineering
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• v.11 no.4
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• pp.1-7
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• 2017

The development of effective design allowable values for unmanned composite aircraft is an issue of paramount concern for the industry. The application of conventional manned aircraft structural certification methods to unmanned aircraft such as prototype and technology demonstrators, can lead to excessively long development time and costs. In this paper, the determining method of composite structure design allowable values for light composite unmanned aircraft is presented to reduce to the structural weight. This paper seeks to show the applicability of composite B-basis material values as a design allowable of light composite unmanned aircraft structures. A review of different civil and UAV targets failure probability is given. From the results, the researchers can know that the requirements of light composite unmanned aircraft design allowable should be alleviated, compared to manned composite aircrafts.

• Korean Business Review
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• v.11
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• pp.195-216
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• 1998

Ownership of an asset can be identified with the right to exercise "residual control" where the contract is silent about decision rights, or with the right to receive any "residual returns" that remain after contractual. obligations are fulfilled. Although the concept of "ownership" seems reasonably clear in many of the cases, the concepts of residual control and the residual returns that define ownership are actually quite elusive. For large corporations, there is really no single individual who owns both the residual returns and the residual control. Despite the limited qualifications, ownership is clearly. the most common and effective meas to motivate people to create, maintain, and improve the value of assets. In this paper, we try to clarify the relationships among financial structure, ownership, and corporate control with the concept of ownership defined as the residual control and the residual returns, Financial securities are not just claims to part of a firm's net income. They give the security holder certain rights. A careful matching of rights of control and returns can create incentives that increase total value of the firms. In the corporate firms, managers, lenders, and shareholders have different interests. And the financial structure affects how different those interests are and what decisions management will make. Managers are, in general, better informed than investors about the firm's prospects. The financial decisions by managers may affect investors' beliefs and, therefore, the price of shares and the value of the firm.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.2
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• pp.171-179
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• 2010

Effective monitoring and maintenance operation of towers, power lines and other defects to ensure high quality and reliability of electric power supplied to customers is becoming one of the most important tasks of today's power industry. One specific technology that has the potential to automate the entire surveillance process is unmanned aerial vehicles. In this paper, we propose a new power line extraction method using the directivity of a power line and Hough transform to detect efficiently power lines from thermal aerial images. In simulation results for several aerial images, the proposed method shows good performance in extracting power line detection.

• KSBB Journal
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• v.8 no.4
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• pp.351-357
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• 1993

Three immobilization techniques and free cell system were tested to determine the most effective technique for the treatment of pulp waste effluent. The tests were conducted using Phanerochaete chrysosporium as a biocatalyst in a process designed to treat pulp waste effluent. The results show that Ca-alginate gel was the best immobilization material. The chosen material improved the stability and increased the removal efficiency of the system. The experiment using the chosen material was mom- bored for 400 hours with no significant changes in the state of the fungus. Common problems with other immobilization materials and free cell system were oxygen transfer resistance caused by air channelling and clogging in the bioreactor.

• Journal of Bio-Environment Control
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• v.24 no.3
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• pp.173-177
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• 2015

This experiment was conducted to determined the optimum planting density for the production of high quality bitter gourd (Momordica charantia L.) adapted in spring cultivation with the unheated greenhouse condition. 'Erave' variety was planted at three different planting densities (235, 305, $380plants{\cdot}10a^{-1}$) on March 26. The training method was six lateral vines with pinching the main one. The light intensity was lower in the higher planting density than the lower one. Net photosynthetic rates of the bitter gourd leaves in the higher density were significantly lower (41 to 71%) than the lower one. There was no difference in the fruit characteristics among treatments. But the root weight was heavier in the lower planting density ($235plants{\cdot}10a^{-1}$) as 113.1g than 96.0g of the higher planting density ($380plants{\cdot}10a^{-1}$). The number of the harvested fruit also higher in the lower planting density ($235plants{\cdot}10a^{-1}$) with 60.7 than 39.9 of the higher planting density ($380plants{\cdot}10a^{-1}$). The average fruit weight was the highest in the plot of $305plants{\cdot}10a^{-1}$ as 338.7g and lowest in the lower planting density ($235plants{\cdot}10a^{-1}$) as 285.2g. The total yield of $305plants{\cdot}10a^{-1}$ density was $5,359kg{\cdot}10a^{-1}$, which was higher than $4,068kg{\cdot}10a^{-1}$ of the lower planting density ($235plants{\cdot}10a^{-1}$). Marketable yield was increased by 24% in the planting density of $305plants{\cdot}10a^{-1}$($4,767kg{\cdot}10a^{-1}$) as compared to the lower density in $235plants{\cdot}10a^{-1}$($3,629kg{\cdot}10a^{-1}$) and increased by 13% in the planting density as $380plants{\cdot}10a^{-1}$($4,137kg{\cdot}10a^{-1}$). Therefore, the planting density of bitter gourd was desirable in $305plants{\cdot}10a^{-1}$ density for the higher yield and quality in the protected cultivation.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.01a
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• pp.231-233
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• 2020

최근 360도 형태로 영상을 촬영하고 제공하는 경우가 많아 일반적인 동영상과 달리 360도 형태의 영상저작물에 적절하고 효과적인 방법으로 광고를 삽입하여 노출 시킬 수 있는 방법이 필요하게 되었다. 따라서 본 논문에서는 실감형 360도 영상저작물 객체 추출을 통한 추천 광고 매칭방법을 제안한다. 360도 영상저작물 내에 광고를 매칭하고 추출된 객체와 연관된 광고를 추출하여 해당 프레임에 자동으로 삽입 노출이 가능하도록 하는 방법으로 이 방법을 이용함으로써 사용자의 현재 시점 영역 내에 광고 영상이 노출되도록 광고의 삽입 위치를 이동시켜 영상이 재생되도록 하거나, 광고 영상이 삽입된 좌표로 사용자의 현재 시점을 이동시켜 영상이 재생되게 할 수 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.1018-1020
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• 2005

그리드 컴퓨팅은 컴퓨팅 자원을 비용편익 측면에서 가장 효율적으로 만들 수 있는 능력을 가지고 있으며, 클러스터링 등의 기술로는 해결하기 어렵거나 시간이 오래 지체되어지는 대량의 컴퓨팅 능력을 요구하는 어려운 문제들을 풀기에 더 없이 좋은 방법 중에 하나이다. 이러한 그리드 컴퓨팅을 효율적으로 수행하기 위해서 지리적으로 분산되어 있는 고성능 컴퓨팅 자원을 실시간으로 상호 연결하기 위해 Grid Application이 필요하게 되었고 이에 미국의 ANL(Argonne National Laboratory)를 주축으로 하여 여러 대학의 연구진에 의해 Globus가 만들어지게 되었다. 그러나. 이러한 Globus상에서 Grid Application을 실행시켜 일정의 Job을 네트워크를 통하여 주고받을 때, QoS가 보장되지 않는 문제점이 발견되었다. 그리하여 이러한 문제점을 해결하기 위하여 GARA(Globus Architecture for Reservation and Allocation)가 ANL에 의해서 개발 되었고, 본 논문은 이러한 GARA의 성능을 테스트 하기 위하여 Testbed를 구성하여 GARA의 자원 예약 명령을 통해 자원을 예약을 수행하고, 그에 따른 적용 결과 및 추후 연구방향에 대하여 논하였다.

• 한국정보교육학회:학술대회논문집
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• 2004.08a
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• pp.556-563
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• 2004

오늘날 SW는 끊임없이 새롭게 개발, 업그레이드되고 있다. 이러한 상황 하에서 단순히 많이 사용되는 소프트웨어를 선별하여 그 기능을 가르치는 방안은 근본적으로 한계를 가지고 있을 수밖에 없다. 배우고 가르쳐야할 SW와 학습량은 계속 늘어날 수밖에 없기 때문이다. 따라서 기존의 보고 따라하는 식의 전통적인 학습 방법에 의존하기보다는 응용SW의 특성에 기초한 새로운 학습 방법을 강구할 필요성이 제기되고 있다. 최근 생산되고 있는 대부분의 SW들은 거의 모두 GUI환경으로 구성되어 있다. 따라서 학생들이 범하는 여러 가지 오류 중에서 GUI환경과 연관되는 것을 찾아 이를 처리해 준다면 대부분의 소프트웨어 학습에서 많은 오류들을 줄일 수 있을 것이다. 이에 본 연구는 GUI 에서 일어나는 여러 가지 오류들에 대해 알아보려고 한다.

• 한국생물공학회:학술대회논문집
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• 2000.11a
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• pp.630-631
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• 2000

Sugar esters are produced by transesterification of fatty acids and sugars in organic solvent media. Chromatographic separation of sugar esters and fatty acids was investigated. $C_{18}$ column($3.9{\times}300mm$) was used in the chromatography experiment. The effect of flow rate, column temperature, and sample loading on the charateristics of chromatogram was studied. Sugar esters and fatty acids tested in this study was successfully separated with a high resolution.