• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.11
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• pp.2111-2118
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• 2008

This parer propose a U-dormitory management system based on 13.56MHz RFID system. The proposed U-dormitory management system consists of three parts, the RFID hardware system, the middleware, and the application. RFID hardware system uses 13.56MHz frequency which is suitable for a close range. The middleware is implemented to accept the RFID hardware system values using RS-232c communication method and forward the values to the application. The application is designed to make the DB using the forwarded Haloes, and works based on the DB. The efficacy of the Proposed U-dormitory management system is verified by means of experiments. In the experiments, we set up the system to the dormitory of Daeduk College to show the improvement results of proposed system.

• Journal of radiological science and technology
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• v.30 no.2
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• pp.147-151
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• 2007

AAPM TG43 report has recommended to measure air kerma strength with the strength of source. Main purpose of this study is to verify the accuracy of air kerma strength provided by manufacturer. Materials for this study were MAX-4001 Electrometer, HDR 1000 Plus of the corporation of standard imaging, and 6 french bronchial Applicator with 1000 mm. we measured ionization current in 10-90 mm range from the bottom of the central axis of chamber. The reference point of calibration displayed by the maximum ionization current in the ionization current curve was measured, and air kerma strength was computed from the maximum ionization current. we acquired 50 mm distance to correspond with the maximum ionization current in the ionization current curve. Its distance has perfectly fitted to the source reference point of calibration certificate of UW-ADCL. Air kerma strength computed value has measured about 0.5% more than calibration value provided by manufacturer. Air kerma strength of calibration certificate provided by manufacturer has acquired reliable results. This study shows that considering the move error of dwell position of source and the dead space length in well-type chamber is a good way to get an accurate result.

• Journal of Korea Entertainment Industry Association
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• v.13 no.2
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• pp.13-25
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• 2019

This study conducted individual in-depth interviews of tourists from Taiwan, Hong Kong and Thailand who visited Daegu. According to the analysis, Taiwan's target audience conducted an interview at the Chimac Festival in July 2018 at Duryu Park and was a university student as an individual female tourist. She got the information through SNS. The accommodation was guest house and medium and low cost hotel. The main tourist attractions included Seomun Market Night Market, Eworld and Dongseongno. The meals were Anjirang Gopchang and Galbijim in Dongin-dong. Next, the Hong Kong tourist interview was held in May 2018 at the Kwandeung Festival in Duryu Park, and was an individual tourist as a man. Lastly, an interview with a Thai tourist was held in April 2018 at the Donghwa Temple Cherry Blossom Festival in Palgongsan Mountain, and he purchased a travel agent product as a man. Participants of the tour in Daegu were interested in unusual experiences such as beauty, wedding, theme parks, and restaurants that are unique to Korea. What was disappointing was that there were not enough shopping facilities, such as duty free shops, and that the table in the restaurant was inconvenient, and that there were not enough signboards by language for foreigners.

• Journal of Advanced Navigation Technology
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• v.19 no.4
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• pp.278-287
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• 2015

The potential impact of aircraft emissions on the current and projected climate of our planet is one of the more important environmental issues facing the aviation industry. Increasing concern over the potential negative effects of greenhouse gas emissions has motivated the development of an aircraft emission estimation and prediction system as one of the ways to reduce aircraft emissions and mitigate the impact of aviation on climate. Hence, in this research, using Piano-X software which was developed by Lissys Co., fuel consumption and emissions for 3 types of aircraft were estimated for different design payloads with various flight distances and flight paths. Fuel burns for economy speed, long range cruise speed, maximum range speed were also investigated with various flight distances and altitudes.

• Journal of KIISE:Information Networking
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• v.30 no.1
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• pp.48-64
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• 2003

Recently, as the number of mobile users keeps increasing explosively, the location management to track the mobile users in mobile communication systems is being more important. However, the previous location management schemes have been used static location information without the consideration of a user's moving direction. This results in unnecessary pagings, consequently it increases location management costs. In this paper, we propose a mew location management costs. In this paper, we propose a new location the cell occurred a location update. It also determines whether the location update will be executed or not, by the offset operation of direction vector. Thus, a user's paging areas are generated dynamically along the user's moving direction. The wide of paging areas is also determined dynamically. Besides, we present analytic model for our scheme. To compare with our scheme, the distance-based scheme is analyzed. The numerical result shows that our scheme is more efficient than the distance-based scheme in the most cases except a low CMR. Particularly if a user move into a specific direction, our scheme has the lower location management cost than that of the distance-based scheme.

• Survey Research
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• v.11 no.1
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• pp.63-85
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• 2010

This study defines the substance and multi-dimension of emotional reactions which Koreans have toward foreigners to find the starting point of change in values which is an inevitable task in this multi-cultural society. The results indicate that the Bogardus scale which has been used to measure the social distance toward the minority race is found to have limitations in explaining the closed attitude of Koreans toward 'nation' and 'kinship through marriage'. To supplement such limitations, exploration on attitudes toward foreigners from different native places is performed based on the 'evaluation', 'power' and 'activity' dimensions of the Affective Control Theory. As a result, Americans are highly evaluated in all three dimensions while Japanese are evaluated low in the 'evaluation' dimension and high in the 'power' and 'activity' dimensions. North Korean defectors and ethnic Koreans from China (the Chosun race) are high in evaluation but low in other dimensions. West Asians are evaluated low in all three dimensions. By comprehending the influencing factors and the relative influence of social distance, it proves that the 'evaluation' dimension is the common denominator in all groups while 'power' dimension toward Japanese and 'activity' dimensions toward Chinese and West Asians influence social distance. All foreigners excluding Americans receive closer social distance when having higher education level. Moreover, American women and older North Korean defectors receive closer social distance.

• 건축구조
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• v.12 no.1
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• pp.11-27
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• 2005

우리 회의 2005년 정기총회가 대치역(대치사거리)에 위치하고 있는 현대건설(주) 주택문화관 에서 1월 26일(수)에 134명 참석, 68명 위임으로 성대하게 개최되었습니다. 금번 정기 총회에서는 2004년 사업실적에 대한 보고가 있었으며 정관개정, 2005년 예산안 및 사업계획안에 대한 의결도 있었습니다. 그동안 수고해 주신 김종수 감사의 임기만료로 태산구조안전(주)의 오창학 소장이 신임감사로 선출되었습니다. 정기 총회를 개최하기 전에 기술세미나를 통해서 우리회 회원 및 비회원들도 많이 참석하셔서 성황을 이루었습니다.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.95-96
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• 2015

공공디자인 중 하나인 공공사인은 방문객들에게 정확한 정보를 인지시킴은 물론 볼 거리를 제공해야 하며, 더 나아가 관광객을 유치하는 수준에까지 도달해야 할 것이다. 이에 이 논문은 공공사인에 필요한 이론적 개념에 대해 정리하고, 해외연구를 통해 부산시 중구 남포동 일대의 사인현황의 실태에 대해 분석하여 문제점을 도출하고 개선방안을 모색하고자 한다.

• 건강소식
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• v.12 no.3 s.112
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• pp.11-19
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• 1988

벌써 경칩이 지난지도 오래 되었건만 하늘에선 때 아닌 눈이 내리기도 하는 요즈음의 변덕스런 날씨. 가물었던 지난겨울을 생각하면 이제사 내려주는 눈이 고맙기도 하지만, 추웠다 더웠다 하는 날씨 속에서 감기로 코를 훌쩍 거리는 사람들이 늘어가고 있다. 또, 세수만 하면 당기는 얼굴을 문지르며 어쩔 바를 모르는 아가씨들도 있으리라. 어떤 질병이건 환절기에 가장 조심해야 하고, 피부의 노화도 이 시기에 가장 많이 발생한다고 전문가들은 얘기하고 있다. 질병은 자신이 원치 않아도 걸리는 수가 있지만, 무엇이든 지혜롭게 대처한다면 몸도 마음도 건강할 수 있으리라 생각한다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 1998.10a
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• pp.26-26
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• 1998

다련장 로켓과 같이 무유도로서 대량 발사하는 탄을 설계함에 있어서 탄의 성능을 예측하기 위해서는 사거리와 고도 해석을 통해 체계 성능을 분석하고 탄의 특성 및 외부요소의 변화 가능성을 고려하여 탄착 정확도에 대한 해석을 수행하여야 한다. 탄착 정확도는 설계하고자하는 무기체계의 신뢰성을 평가하는 최종단계이므로 매우 중요한 factor이다. 다련장 로켓과 같은 무유도 로켓의 탄착 정확도를 평가하는 가장 좋은 방법은 많은 발수의 시료를 발사하여 획득한 데이터를 바탕으로 평가하는 것이다. 그러나 이 방법은 예비 설계시에는 적용할 수 없으며 제작이 되었다 하더라도 비용이 많이 들기 때문에 적용하기 무척 어렵다.