• 대한원격탐사학회지
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• 제39권1호
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• pp.111-127
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• 2023

In visual slam and 3D data modeling, the Iterative Closest Point method is a primary fundamental algorithm, and many technical fields have used this method. However, it relies on search methods that take a high search time. This paper solves this problem by applying an effective point cloud refinement method. And this paper also accelerates the point cloud registration process with an indexing scheme using the spatial decomposition method. Through some experiments, the results of this paper show that the proposed point cloud refinement method helped to produce better performance.

• 한국군사과학기술학회지
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• 제18권4호
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• pp.441-450
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• 2015

The tactical communications network has to be deployed rapidly at military operation area and support the communications between the military command systems and the weapon systems. For that, the frequency assignment is required for backbone wireless links of tactical communications network without frequency interferences. In this paper, we propose a frequency assignment method using net filter discrimination (NFD) and graph coloring to avoid frequency interferences. The proposed method presents frequency assignment problem of tactical communications network as vertex graph coloring problem of a weighted graph. And it makes frequency assignment sequences and assigns center frequencies to communication links according to the priority of communication links and graph coloring. The evaluation shows that this method can assign center frequencies to backbone communication links without frequency interferences. It also shows that the method can improve the frequency utilization in comparison with HTZ-warfare that is currently used by Korean Army.

• 벤처창업연구
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• 제7권2호
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• pp.9-17
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• 2012

다양한 유형의 공공기관과 교육기관에서 창업지원사업을 시행 중이다. 본 연구는 창업교육을 중심으로 각 기관과 단체에서 실행하고 있는 창업지원사업을 연계함으로써 지원성과 제고효과가 있음을 제시한다. 창업지원사업의 목적을 달성하기 위해서 요구되는 것은 창업이전단계부터 창업초기를 거쳐 죽음의 계곡이라 불리는 시점을 극복한 후 성장기업으로 안정화 되는 기간까지, 전체과정에 대한 일관되면서도 효과적인 지원이다. 현재까지 이루어진 대부분 선행연구에서 창업교육 후 사후관리의 필요성을 제시하고 있다. 그러나 교육 후 사후관리의 현실적 방안제시에는 한계를 보이고 있다. 이러한 한계점은 창업교육을 창업전과정의 한 부분으로 분리해서 접근하는 인식에서 발생한다. 이와 같이 분리된 접근 방식은 창업과 관련된 다양한 지원정책의 현실적인 공통점으로 보인다. 본 연구는 창업교육과 창업관련 지원의 연계에서 발생하는 기대효과를 제시하고, 지원정책들과 창업교육의 연계방안으로 창업인증제도의 필요성을 제기한다.

• Transactions on Control, Automation and Systems Engineering
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• 제4권4호
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• pp.264-269
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• 2002

In this paper, Η$_{\infty}$ depth and course controller of an AUV(Autonomous Underwater Vehicle) using Η$_{\infty}$ servo control is proposed. The Η$_{\infty}$ servo problem is formulated to design the controllers satisfying a robust tracking property with modeling errors and disturbances. The solution of the Η$_{\infty}$ servo problem is as fellows: first, this problem is modified as an Η$_{\infty}$ control problem for the generalized plant that includes a reference input mode, and then a sub-optimal solution that satisfies a given performance criteria is calculated by LMI(Linear Matrix Inequality) approach. The Η$_{\infty}$ depth and course controller are designed to satisfy with the robust stability about the modeling error generated from the perturbation of the hydrodynamic coefficients and the robust tracking property under disturbances(wave force, wave moment, tide). The performances of the designed controllers are evaluated with computer simulations, and finally these simulation results show the usefulness and application of the proposed Η$_{\infty}$ depth and course control system.

• 농업과학연구
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• 제40권2호
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• pp.93-99
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• 2013

The disease and insect were surveyed locally in greenhouse, fruit packing house and store house of 51 farms in 13 towns having purpose of paprika exportation. By analysis, various disease and insect were not only founded locally but more ones detected in farms having old facilities and no natural enemy. We found 15 pathogens such as Fusarium spp., Alternaria solani, Leveilluila taurica, PepMV (Pepino mosaic virus) and TMV (Tobacco mosaic virus) in greenhouse, Fusarium spp. in fruit packing house and Penicillium spp. in store house. We found 15 insects in greenhouse such as Bemisia tabaci, rialeurodes vaporariorum and Myzus persicae in greenhouse, Hylobitelus haroldi in fruit packing house. However, the problem quarantine disease and insect for importation and exportation were not detected in inspection time.

• 디지털융복합연구
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• 제12권12호
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• pp.537-544
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• 2014

영화는 어떤 미디어보다 파급력이 크다. 그렇기 때문에 어떤 방식으로든 검열과 등급이 존재해왔다. 하지만 검열은 양날의 칼과 같다. 청소년 보호와 사회의 미풍양속을 보존하려는 의지를 앞세우게 되면 예술가들의 자유로운 창작의지를 꺾게 되고, 그 반대가 되면 사회적 혼란을 가중시킬 수 있다. 따라서 세계 각국은 이 모순적인 상황을 해결하기 위해 다양한 검열 제도를 두고 있다. 최근에는 검열과 등급에 관한 문제를 주로 민간에 이양하는 추세이다. 그러나 우리 영화계는 여전히 일종의 변형된 공공기관인 영상물등급위원회에서 이 문제를 다루고 있다. 그러면서 윤리와 도덕의 수호자로 오인할 수 있는 사태를 양산해서 영화계의 공분을 사고 있다. 최근 영화 심의에 나타는 문제를 해결하기 위해서는 민간이 자율적으로 심의와 등급문제를 해결할 수 있는 주체가 되어야 한다고 생각한다. 따라서 이 연구에서는 민간 심의 기구의 필요성을 타진해 볼 것이다.

• 품질경영학회지
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• 제41권3호
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• pp.475-486
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• 2013

Purpose: In this study, we propose the evaluation criteria and method for selecting intensive management items which, in order to improve the parts management.1) Methods: Parts management such as MIL-STD-3018, SD-19, SD-22 is used for devising the proposed evaluation criteria and method of selecting intensive management items. Especially, proposed evaluation criteria is customized by using AHP method. Results: We approved the importance of evaluation criteria for selecting intensive management items using AHP method. In production step, the parts problem record, the parts reliability, the supplier reliability, DMSM S1). In development step, the parts problem record, a counterfeit, the parts reliability, MTTF2). Conclusion: The evaluation criteria and method for selecting intensive management items which is applicable to the domestic weapon acquisition environment is proposed.

• 유통과학연구
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• 제20권3호
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• pp.53-58
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• 2022

Purpose: Controlling and minority shareholders sometimes have conflicting interests. Controlling shareholders who do not have adequate monitoring can exhibit a strong tendency to maximize their personal wealth. In this case, cash holdings can be the easiest means for them to pursue their personal interests. This study examined whether the largest shareholder's ownership proportion affected the speed at which firms adjust their cash holdings to target levels in Korean distribution and service companies. Research design, data, and methodology: The study uses regression analysis to examine 834 firm-year samples listed on the KOSPI between 2013 and 2018 in the distribution and service sectors. Results: The largest shareholder's ownership is positively related to a firm's cash holdings adjustment speed. That is, the larger the largest shareholder's ownership, the faster the firm adjusts its cash holdings to achieve the target level. Conclusions: This study contributes to the literature by providing evidence that the cash holdings adjustment speed in Korean service and distribution companies is affected by the largest shareholder's ownership. As the agency problem between controlling and minority shareholders in Korea is a major issue, minority owners' sensitivity to agency costs may help restrict controlling owners' ability to maximize their personal wealth.

• International Journal of Advanced Culture Technology
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• 제9권1호
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• pp.168-176
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• 2021

This study developed and evaluated a learning model to improve collaborative problem-solving skills for nursing students taking physiology courses. This one-group pretest-posttest design used the jigsaw cooperative learning method on 30 nursing students from one local university. We analyzed the effect of a cooperative problem- solving learning model using SPSS 21.0 to compare changes in the students' collaborative self-efficacy, problem-solving abilities, and team-member exchange. As a result, the participants showed significant increases in collaborative self-efficacy, problem-solving ability, and team-member exchange after experiencing cooperative problem- solving learning model. Therefore, we will help nursing students improve their communication skills by enhancing their collaborative self-efficacy and help them solve problems effectively in conflict situations.

• 한국군사과학기술학회지
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• 제21권6호
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• pp.776-783
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• 2018

This paper proposes an improved test and evaluation methodology to be conducted for a in-flight threat-countermeasure encounter scenario. Although the conventional test method adopted in the precedent researches allows high precision and safety, such full-scale method is practically not appropriate to apply to small-scale test rounds for evaluating the subparts of the ammunition. To address this problem, this study suggests a readily-applicable, small-scale test and evaluation method of the subpart of the ammunition in firing test. In the threat-countermeasure encounter scenario, the results of several tests demonstrate that the proposed technique does not deteriorate the precision when the engagement point should be adjusted.