• Journal of Communications and Networks
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• 제9권3호
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• pp.296-311
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• 2007

Mobile multi-robot teams are useful in many critical applications such as search and rescue. Explicit communication among robots in such mobile multi-robot teams is useful for the coordination of such teams as well as exchanging data. Since many applications for mobile robots involve scenarios in which communication infrastructure may be damaged or unavailable, mobile robot teams frequently need to communicate with each other via ad hoc networking. In such scenarios, low-overhead and energy-efficient routing protocols for delivering messages among robots are a key requirement. Two important primitives for communication are essential for enabling a wide variety of mobile robot applications. First, unicast communication (between two robots) needs to be provided to enable coordination and data exchange. Second, in many applications, group communication is required for flexible control, organization, and management of the mobile robots. Multicast provides a bandwidth-efficient communication method between a source and a group of robots. In this paper, we first propose and evaluate two unicast routing protocols tailored for use in ad hoc networks formed by mobile multi-robot teams: Mobile robot distance vector (MRDV) and mobile robot source routing (MRSR). Both protocols exploit the unique mobility characteristics of mobile robot networks to perform efficient routing. Our simulation study show that both MRDV and MRSR incur lower overhead while operating in mobile robot networks when compared to traditional mobile ad hoc network routing protocols such as DSR and AODV. We then propose and evaluate an efficient multicast protocol mobile robot mesh multicast (MRMM) for deployment in mobile robot networks. MRMM exploits the fact that mobile robots know what velocity they are instructed to move at and for what distance in building a long lifetime sparse mesh for group communication that is more efficient. Our results show that MRMM provides an efficient group communication mechanism that can potentially be used in many mobile robot application scenarios.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2004년도 춘계종합학술대회
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• pp.412-415
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• 2004

컴퓨터와 네트워크의 보급이 일반화되면서, 현재 인터넷으로부터 기업이나 국가 조직 내부의 정보나 자원을 보호하기 위해 여러 가지 정보보호시스템을 비롯한 보안 네트워크를 구성하여 네트워크 및 시스템을 운영하고 있다. 그러나 기존의 침입 차단 시스템과 침입 탐지 시스템과 같은 시스템 외부방어 개념의 보안 대책은 전산망 내의 중요한 정보 및 자원을 보호함에 있어서 그 한계를 갖는다. 본 논문에서는 해킹으로 판단되는 침입에 대하여 라우터의 구조적 변경 없이 효율적으로 역추적 하기 위해서 ICMP 역추적 메시지(ICMP Traceback Message)를 이용한 ICMP 기반의 역추적 시스템을 설계한다. ICMP 역추적 메시지의 생성은 라우터를 포트 미러링하는 “역추적 Agent”가 담당하며, 이 메시지를 수신하는 피해 시스템은 해당 메시지를 저장하고, “역추적 Manager”가 DDoS류 공격을 탐지하게 되면 해당 메시지 정보를 이용하여 역추적을 시작하여 공격자의 근원지를 찾아내고, 이를 통하여 침입대한 대응을 시도할 수 있게된다.

• 한국산학기술학회논문지
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• 제10권8호
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• pp.2078-2087
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• 2009

1974년 개교 이래로 현재까지 평생교육기관의 역할을 수행하고 있는 방송통신고등학교의 특별활동은 교육여건 및 온라인 콘텐츠의 미비로 사실상 운영되지 못하고 있는 실정이다. 이에 본 연구에서는 방송고 특별활동의 정상적인 운영을 위하여 방송고에 소속되어 있는 교사와 학생을 대상으로 실태분석 및 수요도 조사를 실시, 그 결과를 토대로 방송고 특별활동 영역 중 계발활동 영역에서 선호도가 높게 선정된 4개의 과목을 발굴하여 특별활동 온라인 콘텐츠를 시범 개발하였다. 그리고 개발된 온라인 콘텐츠를 청주 방송고 교사와 학생을 대상으로 시험 적용하였다. 온라인 콘텐츠 적용 후 교사와 학생을 대상으로 설문조사와 심층면담을 실시, 그 결과를 분석하여 특별활동 온라인 콘텐츠 학습의 만족도와 문제점, 특별활동 운영상의 개선방안을 도출하였다.

• 농촌계획
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• 제23권4호
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• pp.91-98
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• 2017

The purpose of this study is to analyze the actual condition of the already established rural theme park, draw the weak and strong points, and come up with an efficient performance plan for Changwon Persimmon Theme Park through the benchmarking of the best overseas case. According to the analysis, it is necessary to introduce a facility and a program for family customers as a plan for promoting Changwon Persimmon Theme Park. It is required to secure safety through public operation and management, improve scalability of the facility through the establishment of multi-functional complex facility, and come up with a plan for operating a special program associated with local resources. Therefore, this study drew three activation factors: the establishment of operation and management system, the development of operation contents by facility, and the establishment of operation in each area. First, to establish the operation and management system, it is necessary to classify the organization of the theme park into the operation business area and into operation & management area by job function. Secondly, it is necessary to establish a special program in consideration of space and facility, suggest a differentiated plan for operation contents, and create a facility operation plan and program for Changwon Persimmon Theme Park. Lastly, to operate and manage Changwon Persimmon Theme Park smoothly, it is necessary to set the theme park space as open collaboration space which the local residents can share and participate in by avoiding the conventional administration-based business performance and operation. This study suggested the plan for establishing an operation and management system for Changwon Persimmon Theme Park and its operation, the establishment of a special program, a business performance strategy, and the use of internal and external spaces of the theme park.

• 한국화재소방학회논문지
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• 제25권2호
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• pp.71-79
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• 2011

최근 소방행정은 인적자원의 중요성을 인식하고 2008년부터 멘토링 제도를 도입하여 신임직원으로 하여금 빠른 시간에 소방조직에 효과적으로 적응할 수 있도록 지원하고 있다. 또한 예방검사요원을 대상으로 직무역량 향상과 전문성 확보를 위하여 멘토링 제도를 도입 운영하고 있다. 그러나 현재 운영하고 있는 소방공무원의 멘토링 제도는 멘토의 전문성 부족, 멘토링의 법적 제도 불비, 멘토링의 매뉴얼 및 자료의 부족, 멘토에 대한 무보상, 형식적인 멘토링 등 다양한 문제점이 나타나고 있다. 본 연구는 소방공무원 멘토링 제도의 실태 분석과 선행연구를 통해 소방공무원 멘토링 기능이 직무역량에 미치는 영향요인을 도출하는데 목적이 있다. 연구의 결과 소방공무원의 직무역량에 영향을 미치는 변수는 역할모델, 업무수행, 지도방법, 태도, 흥미, 역할수행 순으로 상대적인 영향력을 가지는 것으로 나타났다.

• 한국항행학회논문지
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• 제17권6호
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• pp.798-803
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• 2013

본 논문에서는 헬기운항안전 향상을 위한 북미대륙의 활동들을 소개하였다. 북미지역에서는 2009년 기준으로 전세계 민간헬기의 49%가 운용되고 있어, 이 지역에서의 헬기 운항안전을 위한 개발동향은 여타 헬기 운용지역에도 상당한 영향을 미칠 것으로 예상된다. 대규모 헬기가 운용되는 멕시코만의 헬기 운항안전을 위한 개발 사례와 미국 연방항공청(FAA, Federal Aviation Administration)의 NextGen 프로그램 및 국제민간항공기구 (ICAO, International Civil Aviation Organization)의 항공시스템블록업그레이드(ASBU, Aviation System Block Upgrades) 계획 실행을 위한 캐나다 계획 분석을 통해 헬기 관련 인프라 구축 동향 및 향후 헬기 운항안전 증진을 위해 나아갈 바와 기대효과에 대해 정리하였다.

• 융합보안논문지
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• 제18권5_1호
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• pp.75-81
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• 2018

근래에 산업이 융합됨에 따라, 산업 간 융합 도구 활용이 조직 내 보안성에 미치는 영향이 증가하고 있다. 그러나, 조직구성원들은 기존의 시스템을 중심으로 비즈니스를 활동하기 때문에 새로운 시스템 도임에 대한 적응력이 부족하고, 이에 따라서, 보안에 대한 고려는 후 순위로 나타날 수 밖에 없는 환경이다. 본 연구에서는 의료융합산업에서 중소형 의료기관을 대상으로 보안 체계를 구축하기 위해 우선적으로 고려해야 할 요소들에 대한 비용 효율적인 선택방안에 대하여 연구하였다. 구체적으로 선행연구들을 통하여 현재의 법제도 체계를 고려하고 보안현황을 분석하였을 때, 중소형 의료기관에서 필요한 보안 솔루션/시스템/체계에 대하여 도출하였다. 그리고, 실제 비즈니스 환경에서 중소형 의료기관 관련자들을 대상으로 비용 효율적으로 보안 체계를 구축하기 위한 상대적 우선순위에 대하여 분석하고 전반적인 보안체계를 구축하기 위한 방안을 제시하였다.

• Safety and Health at Work
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• 제1권1호
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• pp.29-36
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• 2010

This article describes a systematic roadmap master plan for advanced industrial safety and health policy in Korea, with an emphasis on. Since Korean industries had first emergence of industrial safety and health policy in 1953, enormous efforts have been made on upgrading the relevant laws in order to reflect real situation of industrial work environment in accordance with rapid changes of Korean and global business over three decades. Nevertheless, current policy has major defects; too much techniques-based articles, diverged contents in less organization, combined enforcement and punishments and finally enforcing regulations full of commands and control. These deficiencies have make it difficult to accommodate changes of social, industrial and employment environment in customized fashion. The approach to the solution must be generic at the level of paradigm-shift rather than local modifications and enhancement. The basic idea is to establish a new system integrated with a risk assessment scheme, which encourages employers to apply to their work environment under comprehensive responsibility. The risk assessment scheme is designed to enable to inspect employers' compliances afterwards. A project comprises four yearly phases based on applying zones; initially designating and operating a specified risk zone, gradually expanding the special zones during a period of 3 years (2010-2012) and the final zone expanded to entire nation. In each phase, the intermediate version of the system is updated through a process of precise and unbiased validation in terms of its operability, feasibility and sustainability with building relevant infrastructures as needed.

• 수산경영론집
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• 제52권1호
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• pp.1-22
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• 2021

This study aims to face common threats from the depletion of fish resources, the decline of production and employment as well as the increase of life risk in East Sea Rim countries, North Korea, South Korea, Japan and Russia due to the Chinese fishing fleets entering East Sea. The recent competition in fishing among fishing vessels and fleets of national origin operating in the East Sea has induced a significant change in the ecological landscape of the fishing fleets cluster while having influenced production and employment in the fishing industries of South Korea and Japan as well as life threat on the fishermen in North Korea. It seems that the population organizational ecological theory can be applied to this change. It can be seen as the isomorphism of the selection process over the exclusive economic zone (EEZ) to avoid the environment in which these North Korean fishing vessels are pushed against the Chinese fleet in the North Korean part of the East Sea. To resolve the fishery disputes or conflict in the common waters in East Sea, first of all, Chinese fishing fleets will be required to put international pressure so as to solve the unfairness of the illegal fishing and overfishing by the International Fishery Organization or the UN violations of the sanctions against North Korea selling fishing rights to China. Although it is not easy for South Korea to cooperate with North Korea in the short term, South Korea will be able to support the fishery infrastructure in North Korea in the mid- to the long-term to prevent the loss of innocent lives for their fishermen and to raise their incomes.

• 한국유기농업학회지
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• 제29권1호
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• pp.51-73
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• 2021

This study is intended to derive the key issues on vitalization of the governance of rural area development for 6 cities and counties in Chungcheongnam-do where privately entrusted intermediary support organizations have been established and to present their improvement plans of policy. The findings of the study have shown the governance for the case regions is still being characterized with a very formal governance being dominated by the strong administrative initiative and expediency. What have been presented as the improvement plans of policy are as follows: First, core provisions of the ordinances must be strengthened to mandatory regulations, and some ways to check and supplement such as monitoring, policy forums by public-private partnership, etc. are required for the sake of the effective operation of the ordinances. Second, in relation to the bases of competence according to the roles of core governance players, it is necessary to overcome the limitations of job rotation system, align the administrative support systems, expand the functions of a policy committee based on public-private cooperation and operate it effectively in the case of administration, and to strengthen a footing of a civilian community and the perspectives of political incubation in administration and provide support projects contributing to the growth of the corporations in the case of the entrusted corporation, and to align the operating systems of the centers, review the introduction of a system with a full-time center head, continuously provide specialized education and improve the working environment in the case of the support centers.