• 제목/요약/키워드: Location Allocation Problem

검색결과 83건 처리시간 0.017초

응용지리학 일반의 회고와 전망 (Applied geography:retrospect and prospects)

  • 이희연
    • 대한지리학회지
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    • 제31권2호
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    • pp.329-345
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    • 1996
  • 응용지리학은 실제세계에서 일어나는 사회, 경제, 환경적 문제들을 해결하기 위해 지리적 지식과 기술을 응용하는 지리학의 한 분야이다. 우리나라의 경우 아직 응용지리학 분야가 중요한 위치를 차지하고 있는 편은 아니며, 또 실제 문제를 해결하는 데 필요한 이 론이 잘 구축된 편도 아니다. 주로 토지이용 및 관리, 지역격차 분석과 그 해소방안, 지역개 발전략과 지역정책, 국토개발과 계획, 그리고 관광 분야에 관한 연구가 수행되고 있다. 오늘 날 지리적 차원에서 야기되고 있는 다양한 문제들과 세계화를 지향하고 국토통일을 내다보 고 있는 현시점에서 응용지리학 분야에 대한 연구는 그 어느때보다 절실하다고 볼 수 있다.

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장애인복지관 화재 시 피난안전성 분석 (Analysis of the Evacuation Safety in a Fire at Welfare Center for Disabled)

  • 박선아;이재영
    • 한국융합학회논문지
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    • 제12권12호
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    • pp.315-322
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    • 2021
  • 이 연구는 장애인복지관 화재 시 이용자들의 층별 배치에 따른 비상 통로를 이용한 RSET(Required Safe Egress Time, 피난소요시간)을 분석하여 안전성을 평가하고, 효율적인 피난 방법을 제시하고자 패스파인더 시뮬레이션 프로그램을 활용하여 비상 통로별 RSET의 차이를 분석하였다. RSET에 따른 결과로, 현재 상태의 시설물 사용 인원 배치는 화재 시 기준 RSET을 만족시킴으로 피난안전성에 문제가 없다는 결과를 얻었으며, 화재 시 가능하면 승강기를 이용하는 것보다 계단을 통하여 피난해야 안전하게 피난을 완료할 수 있다. 직원들은 화재 시 장애인들을 대동하여 효과적으로 피난할 수 있도록 사전에 충분한 교육과 훈련이 필요하다. 본 연구는 장애인 관련 시설에서 설계·건축단계에서 운영까지 장애인들이 화재 시 안전하게 피난할 수 있도록 피난통로를 확보하고, 정기적인 피난훈련으로 RSET을 단축시킴으로써 안전하게 피난하여 소중한 생명을 지킬 수 있다는데 의의를 둔다. 향후에는 시설물의 각 층 출입구에 자동방화문을 설치함으로써 특정 위치에서 화재 발생 시 자동방화문의 개폐 여부에 따른 RSET의 연구가 필요하다.

인기도 기반의 온라인 추천 뉴스 기사와 전문 편집인 기반의 지면 뉴스 기사의 유사성과 중요도 비교 (Comparisons of Popularity- and Expert-Based News Recommendations: Similarities and Importance)

  • 서길수;이성원;서응교;강혜빈;이승원;이은곤
    • Asia pacific journal of information systems
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    • 제24권2호
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    • pp.191-210
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    • 2014
  • As mobile devices that can be connected to the Internet have spread and networking has become possible whenever/wherever, the Internet has become central in the dissemination and consumption of news. Accordingly, the ways news is gathered, disseminated, and consumed have changed greatly. In the traditional news media such as magazines and newspapers, expert editors determined what events were worthy of deploying their staffs or freelancers to cover and what stories from newswires or other sources would be printed. Furthermore, they determined how these stories would be displayed in their publications in terms of page placement, space allocation, type sizes, photographs, and other graphic elements. In turn, readers-news consumers-judged the importance of news not only by its subject and content, but also through subsidiary information such as its location and how it was displayed. Their judgments reflected their acceptance of an assumption that these expert editors had the knowledge and ability not only to serve as gatekeepers in determining what news was valuable and important but also how to rank its value and importance. As such, news assembled, dispensed, and consumed in this manner can be said to be expert-based recommended news. However, in the era of Internet news, the role of expert editors as gatekeepers has been greatly diminished. Many Internet news sites offer a huge volume of news on diverse topics from many media companies, thereby eliminating in many cases the gatekeeper role of expert editors. One result has been to turn news users from passive receptacles into activists who search for news that reflects their interests or tastes. To solve the problem of an overload of information and enhance the efficiency of news users' searches, Internet news sites have introduced numerous recommendation techniques. Recommendations based on popularity constitute one of the most frequently used of these techniques. This popularity-based approach shows a list of those news items that have been read and shared by many people, based on users' behavior such as clicks, evaluations, and sharing. "most-viewed list," "most-replied list," and "real-time issue" found on news sites belong to this system. Given that collective intelligence serves as the premise of these popularity-based recommendations, popularity-based news recommendations would be considered highly important because stories that have been read and shared by many people are presumably more likely to be better than those preferred by only a few people. However, these recommendations may reflect a popularity bias because stories judged likely to be more popular have been placed where they will be most noticeable. As a result, such stories are more likely to be continuously exposed and included in popularity-based recommended news lists. Popular news stories cannot be said to be necessarily those that are most important to readers. Given that many people use popularity-based recommended news and that the popularity-based recommendation approach greatly affects patterns of news use, a review of whether popularity-based news recommendations actually reflect important news can be said to be an indispensable procedure. Therefore, in this study, popularity-based news recommendations of an Internet news portal was compared with top placements of news in printed newspapers, and news users' judgments of which stories were personally and socially important were analyzed. The study was conducted in two stages. In the first stage, content analyses were used to compare the content of the popularity-based news recommendations of an Internet news site with those of the expert-based news recommendations of printed newspapers. Five days of news stories were collected. "most-viewed list" of the Naver portal site were used as the popularity-based recommendations; the expert-based recommendations were represented by the top pieces of news from five major daily newspapers-the Chosun Ilbo, the JoongAng Ilbo, the Dong-A Daily News, the Hankyoreh Shinmun, and the Kyunghyang Shinmun. In the second stage, along with the news stories collected in the first stage, some Internet news stories and some news stories from printed newspapers that the Internet and the newspapers did not have in common were randomly extracted and used in online questionnaire surveys that asked the importance of these selected news stories. According to our analysis, only 10.81% of the popularity-based news recommendations were similar in content with the expert-based news judgments. Therefore, the content of popularity-based news recommendations appears to be quite different from the content of expert-based recommendations. The differences in importance between these two groups of news stories were analyzed, and the results indicated that whereas the two groups did not differ significantly in their recommendations of stories of personal importance, the expert-based recommendations ranked higher in social importance. This study has importance for theory in its examination of popularity-based news recommendations from the two theoretical viewpoints of collective intelligence and popularity bias and by its use of both qualitative (content analysis) and quantitative methods (questionnaires). It also sheds light on the differences in the role of media channels that fulfill an agenda-setting function and Internet news sites that treat news from the viewpoint of markets.