• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.85-86
• /
• 2007

생활수준의 향상으로 변전소의 소음은 주민들에게 민감한 문제로 대두되고 있으며, 소음에 관한 민원이 끊임없이 발생하고 있는 실정이다. 이러한 변전소 소음문제를 해결하기 위해서는 변전소의 주소 음원인 변압기의 소음을 줄이는 방법과 변압기의 소음이 민가까지 전파되지 않도록 방음벽 등으로 적절히 차단하는 두 가지 방법이 있다. 본 논문에서는 변전소의 소음문제를 효과적으로 해결하기 위하여 변전소의 소음을 예측하고 그에 따른 적절한 해결책을 제시하였다.

• Journal of the Korean Geographical Society
• /
• v.46 no.3
• /
• pp.366-381
• /
• 2011

A competitive location problem in discrete space is computationally difficult to solve in general because of its combinatorial feature. In this paper, we address an alternative method for solving competitive location problems in discrete space, particularly employing deterministic allocation. The key point of the suggested method is to reducing the number of predefined potential facility sites associated with the size of problem by utilizing geometric concepts. The suggested method was applied to the existing broadband marketplace with increasing competition as an application. Specifically, we compared computational results and spatial configurations of two different sized problems: the problem with the original potential sites over the study area and the problem with the reduced potential sites extracted by a GIS-based geometric algorithm. The results show that the competitive location model with the reduced potential sites can be solved more efficiently, while both problems presented the same optimal locations maximizing customer capture.

• Journal of Educational Research in Mathematics
• /
• v.16 no.4
• /
• pp.345-366
• /
• 2006

In this study, we investigated the methods of using the Cabri3D program for education of problem solving in school mathematics. Cabri3D is the program that can represent 3-dimensional figures and explore these in dynamic method. By using this program, we can see mathematical relations in space or mathematical properties in 3-dimensional figures vidually. We conducted classroom activity exploring Cabri3D with 15 pre-service leachers in 2006. In this process, we collected practical examples that can assist four stages of problem solving. Through the analysis of these examples, we concluded that Cabri3D is useful instrument to enhance problem solving ability and suggested it's educational usage as follows. In the stage of understanding the problem, it can be used to serve visual understanding and intuitive belief on the meaning of the problem, mathematical relations or properties in 3-dimensional figures. In the stage of devising a plan, it can be used to extend students's 2-dimensional thinking to 3-dimensional thinking by analogy. In the stage of carrying out the plan, it can be used to help the process to lead deductive thinking. In the stage of looking back at the work, it can be used to assist the process applying present work's result or method to another problem, checking the work, new problem posing.

• Venture DIGEST
• /
• s.130
• /
• pp.25-27
• /
• 2009

보이지 않지만 우리의 건강을 좀먹는 오염된 공기. 특히 환기가 어려운 실내의 오염된 공기는 건강한 삶의 적이다. 공기청정기가 등장하고, 공기 오염에 대한 규제도 생겼지만 여전히 실내 공기 오염 문제는 완벽하게 해결되지 않고 있다. 하지만 무슨 문제든 해결할 방법은 있는 법. 획기적인 시도로 새로운 실내공기 정화 기술을 개발한 벤처기업이 등장했다. 전북 진안의 마이산 자락에 자리를 잡은 (주)세인테크가 그 주인공. 기분 좋은 녹색 바람이 불어오는 그곳을 찾았다.

• Information and Communications Magazine
• /
• v.16 no.3
• /
• pp.113-122
• /
• 1999

• Journal of The Korean Association of Information Education
• /
• v.18 no.2
• /
• pp.243-254
• /
• 2014

We need problem solving abilities based on the information abilities in information-oriented society. New curriculum is demanded by new technology and circumstance to need the core competencies. Korea Association of Information Education has studied new curriculum and suggested new plans that contents of information education classified by 'Software', 'Computer System' and 'Convergence Activities.' Therefore, we studied on 'Problem Solving' topic of the 'Software' section of first grade to ninth grade. In this paper we firstly categorized 'Problem Solving' as 'Problem Comprehension and Analysis', 'Data Management', 'Strategy Establishment for Problem Solving', 'Problem Solving Method Seeking and Development' and 'Examination of Problem Solving Method.' We nextly suggested the achievement goals, teaching-learning methods and evaluation methods of 'Problem Solving' topic. We expect that the achievement goals and teaching-learning methods we suggested about 'Problem Solving' topic will contribute to training talented individuals.

• School Mathematics
• /
• v.15 no.2
• /
• pp.389-404
• /
• 2013

Researchers have suggested that students should be experienced in progress of geometric thinking set out in naive and intuitive level and deduced throughout gradual formalization rather than completed mathematics are conveyed to students for students' understanding. This study examined naive and intuitive thinking of students by investigating students' geometric problem solving without diagrams. The students showed these naive thinking: lack of recognition of relation between problem and conditions, use of intuitive judgement depending on diagrams, lacking in understanding of role of specific case, and use of unjustified assumption. This study suggests implication for instruction in geometry.

• Journal of the Korean School Mathematics Society
• /
• v.14 no.2
• /
• pp.163-178
• /
• 2011

The mathematics curriculum revised in 2007 includes 'problem fabrication'. So it is necessary to analyse the texts how much they include problem fabrication. In mathematics, problem fabrication and problem solving interact and stimulate each other. Also the main purpose of problem fabrication is to improve the students' problem solving. There are 16 different texts of grade 7 algebra which contain problems concerning 'problem fabrication'. We count the number of such problems in each sections. Also we divide problem fabrication into five types. Then we count the number of problems in each type and its frequencies in a section.

• The Transactions of the Korea Information Processing Society
• /
• v.7 no.1
• /
• pp.12-19
• /
• 2000

In the development of a production process scheduling system a collaboration method must be defined for the cooperation among submodules within the system. The blackboard architecture is exploited for solving the collaboration problem, which is one of the problem solving architecture that belongs to the distributed artificial intelligence. The dynamic states of the problem solving processes are presented in the hierarchically constructed shared working memory called as a blackboard. The communication for the collaboration is done through the blackboard. The problem solving steps are contained in the global controller, one of a component that consists the blackboard architecture, as knowledge. The global controller activates proper submodules based on the knowledge. By applying the blackboard architecture the collaboration problem among submodules in the grating production process scheduling system (GPSS) has been solved as well as the system became adaptable to the future modifications and expansions.

• Proceedings of the Korea Database Society Conference
• /
• 2001.11a
• /
• pp.536-554
• /
• 2001

인터넷 이용자의 증가와 멀티미디어 등 대용량 콘텐츠에 대한 수요의 증가로 인해 데이터 트래픽은 기하 급수적으로 늘어나는 데 비해 네트웍 성능향상에 대한 투자는 이에 미치지 못함으로서 결과적으로 인터넷은 트래픽의 병목현상, 즉 정체현상이 발생하게 되었으며 점차 그 정도가 심해지고 있다. 이 문제를 해결하기 위해 제안하는 방안이 바로 전략적 CDN(Content Delivery Network) 이다. 현실적으로, 본 연구는 물리적인 망 증설만으로는 트래픽 체증 문제를 해결하기는 어려우므로 주요 ISP 네트웍에 전략적 캐시서버를 설치하여 CP의 콘텐츠를 각 ISP 네트웍마다 분산하여 저장하고 이용자의 요청 시 이용자의 인터넷 회선이 물려 있는 ISP 네트웍에서 바로 콘텐츠를 전송하여 데이터 손실과 속도 저하 등의 문제를 해결하는 CDN의 구성과 그 효과를 실증적으로 밝혔다.