• Journal of Korea Multimedia Society
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• v.12 no.7
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• pp.997-1005
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• 2009

In this paper, we suggest an energy-efficient clustering scheme based on cross-layer design in wireless sensor networks. The proposed scheme works adequately for the characteristic environment of the networks. In the proposed clustering scheme, we separate clusters composed of sensor nodes in the event area from clusters of the other area when an event occurs by using an application layer information. We can save energy from multiple paths through multiple clusters to deliver the same event. We also suggest TDMA scheduling for non-evented clusters. In the scheduling, we allocate one time slot for each node to save energy. The suggested clustering scheme can increase the lifetime of the entire network. We show that our scheme is energy efficient through simulation in terms of the frequency of event occurrences, the event continual time and the scope.

• Journal of Hydrogen and New Energy
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• v.10 no.1
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• pp.41-48
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• 1999

The heat transportation from a complex of industry to a rural area needs more efficient method because the distance between them is usually more than 10km. Conventional heat transportation using steam or hot water via pipe line has limits in transportation distance (about 3-5 km) because of the heat loss and frictional loss in the pipe line. Metal hydride can absorb or discharge hydrogen through exothermic and endothermic reaction. After releasing hydrogen from metal hydride with heatings by waste heat from industry we can transport this hydrogen to the rural area via pipe line. In the urban areas other metal hydride reacts with this hydrogen and produces heat for heating. Cool heat is also obtained if it is possible to use metal hydride with low reaction temperature. So metal hydride can be used as a media for transportation, storage of heat. Some problems of the heat transportation using metal hydrides, and the example of heat transportation system were discussed.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.23 no.3
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• pp.273-282
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• 2005

A rapidly developed satellite technology is used in comprehensive fields such as spatial data aquisition and applications. Especially a GPS positioning is expected to reinvigorate at the national reference system changes to ITRF (International Terrain Reference Frame). Currently the National Geographic Information Institute (NGII) issues a triangulation point coordinate by separating old and new coordinates and in the year of 2007 it will be scheduled to be changed ITRF. The triangulation point coordinate in Cheju area causes some problems due to the difference original observation and re-observation. Thus in this study a GPS observation is conducted after re-organizing geodetic network based on 1st and 2nd order triangulation in order to check the current triangulation points in Cheju area. After the GPS observation data analysis, stable points were extracted, proposed a geodetic network and its application.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.7
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• pp.720-725
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• 2017

This paper evaluated the safety and serviceability of a building structure considering the multi-hazard and proposed TMD-based adaptive smart control system to improve the structural performance. To make multi-hazard loads, an artificial earthquake and artificial wind loads were generated based on representative regions of strong seismicity and strong wind in U.S.A. The safety and serviceability of a 20-story example building structure were investigated using the generated artificial loads. A smart TMD was employed to improve the safety and serviceability of the example structure and its capacity of structural performance improvement was evaluated. The smart TMD was comprised of a MR (magnetorheological) damper. Numerical analysis showed that the example building structure could not satisfy the design limit of safety and serviceability with respect to multi-hazard. The smart TMD effectively reduced the seismic responses associated with the safety and wind-induce responses associated with serviceability.

• Journal of the Korean Society for information Management
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• v.37 no.3
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• pp.51-75
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• 2020

All public libraries are collection-based knowledge and cultural service institutions. To this end, a collection development policy is an essential and a strategic menu that every library should establish first. Regional central libraries should establish and apply optimal collection development policies to conduct the legal duties as knowledge and information centers and cooperative preservation facilities of the cities and provinces. Thus, this study analyzed and compared in detail the collection development guidelines (draft) and regulations of regional central libraries in Korea and the collection development policies of metropolitan public libraries abroad. Results showed that the policies of domestic regional central libraries were simply practical guidelines while those in most developed countries were substantial in format and content. All regional central library systems should establish and document collection development policies based on the importance of collection development, future-oriented thinking, and strategic decision. The study also suggested the basic principles and the format for this purpose.

• The Journal of the Korea Contents Association
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• v.18 no.5
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• pp.11-22
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• 2018

This study examines the structure and contents of the various programs offered by the Cologne City Library in Cologne, Germany, and discusses its implications for the role of the changing public libraries in the era of the Fourth Industrial Revolution. The Cologne Municipal Library, which has continuously played a leading role in the education of German libraries since its opening, has been transforming itself to become a center for producing information and knowledge and developing culture in accordance with the dynamic era of the Fourth Industrial Revolution. Currently, the Cologne Municipal Library plays a role as a multi-cultural space in the community where local members can experience various cultures, such as movies, music and games, and create a culture, beyond the traditional functions of library collection and preservation. The program of the City Library in Cologne, Germany, will help to redesign the functions and roles of public libraries in Korea in the future, and plan library contents for local members.

• Journal of the Korean Geographical Society
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• v.33 no.spc
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• pp.697-707
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• 1998

인간과 환경과의 관계의 역사적 변천을 인구변화와 자원관리의 측면에서 분석하는 기존 관점은 인구기초이론, 기술기초이론, 시장기초이론 등으로 분류된다. 이러한 관점은 어느 한가지 변수를 독립 변수로 가정하는 입장을 취하므로 흔히 '단일요소이론'이라고 불리며, 제각기 장점이 있기는 하지만 현실 세계의 복합성을 단지 부분적으로 설명하는데 그치는 문제점을 내포하고 있다. 현실세계의 모든 사건은 개방된 체계 속에서 발생하기 때문에, 모든 사건은 단선적인 인과관계로 파악될 수 없을 만큼 서로 복합하게 얽혀 있다. 이에 대하여 문화생태이론은 단일요소이론의 그러한 한계를 극복하고 현실세계의 복합성을 분석할 수 있는 개념과 방법을 제시하고 있다. 문화생태이론은 실로 인간과 환경과의 관계가 역사적으로 변천해 온 과정을 탐구하는데 적합한 개념과 방법을 장점으로 내세우는 새로운 관점이라 할 수 있다. 문화생태이온은 인구, 기술, 시장, 제도 등 요소의 중요성이 시간과 장소에 따라 다를 수 있다는 가정 하에서 어떠한 요소라도 어느 한 장소와 시점에서 인간과 환경과의 관계의 변화를 주도할 수 있다고 기대한다. 한국 농촌의 인간과 환경과의 관계를 탐구함에 있어서 활성되어야 할 문화생태이론의 기초적인 개념은 '지역인간생태계'와 '문화적 적응'이다. 한국 농촌의 지역인간생태계는 그 특성상 인구, 농업, 시장, 제도로 구성되어 있다고 볼 수 있다. 문화적 적응이란 변화하는 환경 속에서 사회구성원들의 환경에 대한 적응도를 높일 수 있는 행동양식을 새로이 선택하는 행위를 일컫는다. 한국 농촌에서는 적응전략이란 농업의 집약화와 상업화 또는 산아제한과 인구이동이라는 측면에서 분석될 수 있을 것이다. 생존, 기술, 취락형태, 토지이용, 무역이나 교역 등은 적응전략을 분석하는데 간접적인 자료를 제공해 줄 것이다.

• Journal of the Korean Geographical Society
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• v.46 no.1
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• pp.100-114
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• 2011

The purpose of this study is to suggest the contents for geography education about East Asian cultural diversity. I chose "Human Relationship and Living-Habit" culture among East Asian diverse cultures and fixed 4 themes: family cultures, traditional cultures, friendship cultures and relationship cultures with other people. For making the lesson contents for East Asian cultural diversity, I analysed Geography 2009 Revised Curriculum and presented specific contents differently depending on grades. Until now, static and homogeneous cultures in East Asia have been emphasized mostly at school but cultures that are dynamic and related to students$^{\circ}{\phi}$ life are proposed in this study. Through understanding the differences of the East Asian cultures, it will be possible to expand mutual understandings among the East Asian people. This study will be a good alternative and paving the way for enhancing cooperations in East Asia.

• Journal of the Korean earth science society
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• v.27 no.5
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• pp.528-538
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• 2006

Main aspect of this study is to clarify the petrochemistry and petrogenesis of intermediated-basic plutons located in the southwestern part of the Korean peninsula. These Intermediated-basic plutons consist of Pre-Cambrian anorthosite-gabbro, Triassic hornblende gabbro (Jirisan area), Jurassic diorite-syente (Jirisan and north area) and Cretaceous gabbro-diorite (south area). The Massif type anorthosite has multi intrusions, where each one intruded by gabbroic rocks, composed of gabbro, norite, troctolite and leucogabbro. In the variation diagram of the major-minor composition, AMF and Pl-Px-Ol diagrams, we suggest that intermediated-basic plutons in the southwestern part of the Korea show a trend consistent to Daly's value and calc-alkaline rock series. Accoding to REE (La/Yb)cw and Eu/Sm, these plutons are enriched with LREE than HREE, and emplaced by the tectonic setting in continent and/or continental margin.

• Korean journal of communication and information
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• v.77
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• pp.164-199
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• 2016

This study analyzes the socio-economical contexts of Japan's Karaoke inflow in Busan of the 1980s, and examines the relationship between Karaoke culture of the 1980s and 'Noraebang' culture of the early 1990s in Busan from the perspective of the SCOT(social construction of technology) theory. By the end of 1970s, Japan's Karaoke was introduced under the contexts of structural transformations of a geisha tourism in the East Asian regions. Karaoke culture in Busan of the 1970s and 1980s has formulated social recognitions of the novelty of Noraebang culture in the 1990s, although it has done so through the ways of misunderstandings and Nationalism.