• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.306-307
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• 2023

본 연구는 협업 기반 필터링을 이용하여 반려동물 동반 가능 장소를 추천해주는 시스템을 제안한다. 반려동물 양육 인구가 늘고 있는 현재에 반해 반려동물을 대상으로 하는 추천 시스템은 발전이 더딘 상황이다. 반려동물은 다양한 크기와 종류를 갖고 있기 때문에 기존의 인간 기준의 추천 시스템과는 다르게 접근해야 할 필요성이 있다. 본 연구에서는 반려동물의 다양한 특성을 고려한 장소를 추천해주기 위해 협업 기반 필터링을 활용하였다. 사용자 데이터의 수가 늘어나면 결과의 정확도를 높여주지만, 사용자 간의 유사도를 구하는 비용이 증가한다. 이러한 장단점을 고려하여 '아이템 기반 협업 필터링' 과 '사용자 기반 협업 필터링' 방법을 적절히 사용하는 방향을 제안한다.

• Journal of Aerospace System Engineering
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• v.18 no.2
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• pp.1-11
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• 2024

This paper applies a relative impact angle control guidance law to a communication-based multi-missile network system with uncertainties and disturbances. The multi-missile network system is represented as a transitive reduction directed acyclic graph. Furthermore, this paper introduces both centralized and decentralized guidance laws based on the graph's structure. The relationship between these guidance laws is analyzed by comparing them based on the communication structure and the presence of system noise. To analyze the effects of decentralized optimal cooperative guidance law, this paper assumes uncertainty in missile dynamics and predicted impact point information for the relative impact angle control mission. Monte Carlo simulations are conducted for various mission environments to analyze the impact of communication and its structure on the system.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.593-597
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• 2003

As construction projects are complicated and large in scale, a collaboration between project participants is getting more emphasized over the last few years. The collaboration tools for participants are various. but traditionally drawings and specifications have played an important role. Especially, though storage form in drawings vary in entire construction lifecycle, drawings are still important as the core factor in latest information technology streams in regard to usefulness and reusability of information. As an attempt to standardize drawings in the public construction based on CALS/EC, this study analyzes user's requirements for drawings qualitatively, and looks into drawings standards in Korea, America and Japan, and each kind of ISO standard for drawings. And this study predicts future-oriented user's requirement for drawings based on Construction CALS/EC, and presents future-oriented direction of development applicable in domestic drawing standard in construction.

• Journal of Korean Society of Forest Science
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• v.85 no.3
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• pp.487-495
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• 1996

The objective of this study was to investigate the actual state of the national project to promote the management of Forest Management Cooperatives(FMC). To fulfil the objective, we have reviewed recent statistics, regulations, and publications related with FMC and interviewed officials and professionals engaged in FMC-related organizations. Also cognition of members on the actual state of the management of FMC's was studied by a questionnaire survey. The questionnaire was designed to get understandings of the general cognition of FMC's members associated with forest management and FMC's management activities. According to the results of the survey, more than 50% of members are not interested in forest management and most of them are not satisfied with the activity of FMC. In this paper, the results of analyses for the survey are discussed in detail. On the other hand, statistics indicate that the basic policy for FMC contributes to rapid growth in the number of local FMC's. However, the increase of FMC's has negative effect on management conditions of existing FMC's because of reduced budget allocation from the government. In addition, we concluded that some parts of current regulations for FMC are unfavorable in promoting the spontaneous management activities of local FMC's.

• Journal of Practical Engineering Education
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• v.12 no.2
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• pp.275-291
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• 2020

This study aims to identify the structural relationship between mastery-approach goal orientation, instructor support, problem solving, collaborative skills, and course satisfaction among students who participated in project-based learning. To achieve the purpose of this research, researchers have conducted surveys between June and December in 2019. A total of 283 cases were selected for analysis. According to the study, mastery-approach goal orientation and instructor support have positive effects on problem solving and course satisfaction. Instructor support has positive effects on collaboration skills, and problem solving has positive effects on collaboration skills and course satisfaction. Also, the mediating effect of problem solving in the relationship among mastery-approach goal orientation, instructor support, collaboration skills, and course satisfaction was found to be statistically significant. However, the path between mastery-approach goal orientation and collaboration skills was not statistically significant. Based on these findings, academic and practical implications were suggested.

• Journal of the Korea Society of Computer and Information
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• v.19 no.4
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• pp.101-109
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• 2014

This paper aims to design and implement a collaborative learning system based on the augmented reality. The existing augment reality-based learning systems have just focused on interactivity between a system and learners without consideration of cooperability, thereby leading to an ineffective approach to encouraging an learning system to be more supportive and conducive of and to cooperation among learners. The collaborative learning system is a learning method, with which learners achieve a common objective through critical thinking and cooperative teamwork so as to seek solutions to such fulfillment. This requires positive interdependence, proactive interactions, a sense of responsibility shared by individuals as well as the group, and development of teamwork among learners. Educators and systems assume a critical role in helping the collaborative education be effective. An educator is responsible for defining a project at the outset of learning activities, organizing groups for learners, and providing evaluation criteria applied to a group's project activities. Meanwhile, a system shall support interactions to take place while facilitating learning activities. Furthermore, an educator shall provide a system for managing and evaluating activities involving interactions among learners. This paper suggests and embodies a collaborative learning system based on the augmented reality with consideration of the aforementioned collaborative education.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.262-267
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• 2007

다자간 분산형 협업 시스템인 Access Grid(AG)는 IP 멀티캐스트 네트워크상에서 여러 사용자들 간에 영상, 음성 및 다양한 데이터의 공유를 통해 상호 의사소통이 가능한 공동 작업환경을 제공하기 위해 개발되었다. 멀티캐스트를 사용함으로써 AG는 대역폭 효율적으로 다수 사용자 사이의 의사소통 환경을 제공하고 있다. 그러나 IP 멀티캐스트의 설정 및 관리상 복잡성으로 인해 이를 지원하지 않는 네트워크가 다수 존재한다. 이는 AG를 이용한 협업 서비스를 이용하는 데에 큰 장애물이 되고 있다, 본 논문에서는 이러한 멀티캐스트 연결성 문제에 대한 해결책으로 응용 계층의 멀티캐스트 터널링 프로토콜인 UMTP (UDP multicast tunneling protocol) 를 확장한 멀티캐스트 연결성 솔루션인 AG Connector를 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.408-411
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• 2016

최근 국내의 콘텐츠 생산률이 증가함에 따라, 많은 사람들이 즐길 수 있는 콘텐츠들이 많아 졌다. 하지만 사람들은 많아진 콘텐츠로 인해, 오히려 원하는 정보를 빠른 시간에 얻는 것이 힘들어졌다. 이러한 문제를 해결하기 위해 다양한 방식의 새로운 서비스들이 제공 되고 있다. 추천 시스템 중에서 웹툰을 추천해주는 알고리즘으로 협업필터링 방법이 가장 많이 사용되고 있다. 협업필터링 방법에는 희박성과 확장성, 투명성의 문제점들을 가지고 있다. 따라서 본 논문에서는 협업 필터링 방법의 희박성 문제를 보완하고자 개인의 성향을 반영하여 효율이 좋은 웹툰 추천 시스템을 제안하고, 하둡 시스템에서 구현한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.04a
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• pp.1113-1114
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• 2010

협업필터링 방법은 가장 일반적으로 사용되는 추천 시스템이다. 그런데 협업필터링 방법은 희박성, 확장성 그리고 투명성 등의 문제점을 가지고 있다. 본 논문에서는 개인 성향 중 장르, 성격, 나이, 성별, 혈액형, 지역 등을 고려하여 희박성 문제를 개선한 영화 추천 시스템을 제시한다. 즉, 개인 성향 정보에 따라 가장 성향이 비슷한 사용자들을 분류하고, 그 분류된 정보를 이용하여 개인에게 가장 적합한 개선된 영화추천 기법을 제안한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.7
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• pp.699-708
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• 2017

The service industry, as a new growth engine, has become more important in response to changes in the global economy and the industrial environment. Developed countries have promoted the competitiveness of the service industry and have enhanced economic added value. Developing new services requires extensive resources. Therefore, cooperation and network building capabilities with customers, suppliers, and various knowledge creation agencies are critical sources of competitiveness. This study classified the Korean service industry by industrial type in order to enhance innovation competence.The Korean service industry lags behind that of developed countries, and this study analyzed the differences of innovation results according to collaboration partners by the classified industry. By adopting a method that applies industrial classification by Dialogic's innovation pattern, this study showed external cooperation results were different by industrial type. Analysis results revealed that companies cooperate with customers and competitors in many cases; however, product innovation was higher for companies that collaborated with private service companies. In the 'Innovation in services' industry, industry cooperation with universities showed organizational innovation achievements. In the 'Innovation through services' industry, cooperation with customers positively affected marketing innovation achievements. Consequently, the need to foster consulting firms and universities that can professionally collaborate with companies is implied in order to enhance the Korean service industry.