• 제목/요약/키워드: contact areas

검색결과 497건 처리시간 0.028초

코로나 19 동선 관리를 위한 적정 앱 서비스와 도입: 고위험 지역 설문 연구 (Appropriate App Services and Acceptance for Contact Tracing: Survey Focusing on High-Risk Areas of COVID-19 in South Korea)

  • 노미정
    • 한국병원경영학회지
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    • 제27권2호
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    • pp.16-33
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    • 2022
  • 연구목적: 적절한 동선 파악과 동선 추적은 코로나19 역학조사를 위해서 매우 중요하다. 동선 추적 앱 도입을 활발히 하기 위해서는 사용자들의 앱에 대한 기대, 선호 그리고 우려하는 부분에 대한 이해가 필요하다. 본 연구는 동선 추적 앱의 사용률을 높이고, 데이터 공유를 원활히 할 수 있게 해주는 자발적 앱 서비스에 대한 기본적 특징과 적절한 서비스를 찾고자 하였다. 또한 사람들이 왜 동선 추적 앱을 사용하려고 하는지에 대한 주요요인을 확인하였다. 연구방법: 이 연구는 2020년 11월 11일부터 12월 6일까지 온라인 서베이를 실시하였고, 통 1,048명의 응답 데이터를 수집하였다. 응답 데이터 중 2020년 가장 많은 코로나19 확진자가 나온 지역의 883명의 응답자 데이터를 분석에 사용하였다. 결과: 코로나 19 관련 앱을 사용해본 경험자들은 동선 추적 앱에 대한 높은 사용의도를 가지고 있는 것으로 나타났다. 응답자들은 보건소와 같은 공공기관에서(74%), 무료(93.88%)로 앱을 제공해주기를 원했다. 동선 추적 앱 사용의도에 영향을 미치는 요인으로는 예방적 가치, 기대성과, 인지된 위험, 촉진기능, 노력기대 등으로 나타났다. 또한 개인정보 보호 및 개인정보 노출에 대한 사용자들의 우려를 해결하고 자발적 앱 사용이 필요한 것으로 분석되었다. 함의: 본 연구 결과는 동선 추적 개발에 있어, 적절한 서비스와 사용자들의 니즈를 파악하는데 유용할 것이다. 사람들의 앱 참여율과 데이터 공유를 높일 수 있는 자발적 앱 개발을 위한 기반을 제공해준다. 또한 본 연구는 역학조사에 협조가 가능한 신뢰 가능한 동선 추적 앱 개발의 근간을 마련할 수 있다.

공동주택 커뮤니티 공간의 빛환경 측정 및 조명계획 (Measurement of Luminous Environment and Study on Lighting plan for Community Areas)

  • 이정은;최안섭;최성열
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2004년도 학술대회 논문집
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    • pp.169-174
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    • 2004
  • As quality of life improves, apartment's residents prefer residing type that have differentiation of resident center. Accordingly, community facilities such as fitness club, swimming pool, and so on are operated in apartment complex. Community areas are important space that can induce inhabitantses' natural meeting and contact, and that can solve social problems which is started each individuals' estrangement in current through community formation between neighborhood. From this point of view, this paper investigated the essence of light and the luminous environment for community areas. This paper finally suggested well-coordinated lighting plan of community areas, derived from the measurement and analysis of luminous environment in these cases.

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축방향 하중을 받는 고속 세라믹 볼베어링에 대한 EHD 윤활영역에서의 성능 해석 (Performance Analysis of High-Speed Ceramic Ball Bearings Under Thrust Loads in EHD Lubrication)

  • 반종억;김경웅
    • Tribology and Lubricants
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    • 제14권2호
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    • pp.26-34
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    • 1998
  • This paper presents a high-speed performance analysis of ball bearings with ceramic balls under thrust loads. The sliding velocity profiles between a ball and raceways were obtained by the 3-D quasi-dynamic equations of motion including both centrifugal force and gyroscopic moment derived by vector matrix algebra. The friction at the contact areas was obtained by the Bair-Winer's non-Newtonian rheological model and the Hamrock-Dowson's central film thickness in EHL analysis. The nonlinear equations were solved by the Newton-Raphson method and the underrelaxation iterative method. The friction torques and ball behaviors with various loads, ball materials, and contact angles were predicted by this model. It was shown that the friction torque was sensitive to thrust load and contact angle, and that the friction torque and the pitch angle of the bearing with ceramic balls are smaller than those of the bearing with steel balls.

침수에 의한 누전지역의 자속밀도 영향 (Influence of Flux Density of Electric Leakage Area by Inundation)

  • 최운식;김탁용;김진사
    • 전기학회논문지
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    • 제59권6호
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    • pp.1109-1113
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    • 2010
  • Recently, important for the safety has been increasing together economic developments. The leakage only is measured by the voltage difference. This method is a way to contact the electric leakage area. It can cause electric shock at users. We propose a non-contact method to detect a short circuit in this paper. We investigate magnetic field at electric leakage area to present non-contact method. Simulated environment created a short circuit in the flooded areas. Voltage is supplied 50, 150 and 200[V]. Magnetic field was measured at 0, 5 and 10[cm]. Magnetic flux was reduced about $0.4[{\mu}T/cm]$ depending on the distance changes in the steady region. But we confirmed that magnetic flux is measured the same value depending on the distance changes in the electric leakage area.

Soil compaction and tractive force of big tractors and caterpillars (challenger 65 &45)

  • Weibbach, Michael
    • 한국농업기계학회:학술대회논문집
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    • 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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    • pp.404-412
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    • 1996
  • For the cultivation of big agricultral areas high performance machinery is needed. The need to increase working productivity also leads to powerful machinery. The total weight of new tractor generations increases and with it their axle and wheel weight reaches a soil damaging extend. Besides carrying the mass of the tractors and harvesting-machines the chassis must transmit driving force onto the ground(Tab. 1). To decrease soil damaging compaction a number of technical solutions have been developed. Broad tyres are being used to minimize the contact-area pressure by using low tyre air pressure. For enlarging the contact area there are two-possibilities : to build a brought or a long contact area. done for instance in caterpillar tracks.

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홀로그래픽 간섭법을 이용한 미소변형 측정법 (The Measurment Method of Small Deformation by using Holographic Interferometry)

  • 강영준;문상준
    • 한국정밀공학회지
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    • 제12권9호
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    • pp.52-58
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    • 1995
  • Conventional measurement methods for non-destructive testing(NDT) in nuclear power plants and other industrial plants have been performed as the methods of contact with objects to be inspect, but those methods have been taken relatively much time to be inspected. Holographic interferometry which is a non-contact optical measurement method using a coherent light can overcome these demerit, and also has an advantage that the quantitative measurement of small deformation for large areas can be accomplished at a time with high precision. In this paper the comparisons of the experimental results form holographic interferometry with those from the finite element method(FEM) and the analytical solutions of the elastic equation are discussed.

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한국 운동선수의 스포츠 치의학에 대한 인지도 및 치아교모상태에 관한 연구 (Korean athlete's recognition of sports dentistry and condition of teeth wear)

  • 이성복;최대균;한광흥
    • 구강회복응용과학지
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    • 제18권4호
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    • pp.235-249
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    • 2002
  • This study was accompolished to analyze and compare the number and area of the occlusal contact points in healthy volunteers and athletes with normal occlusion. Before the study, 89 athletes(sports career:8.6 years, average age 20) at Kyung Hee University were selected, and survey was accomplished for athlete's recognition about sports dentistry. For this study, 15 athletes(13 amles and 2 females with average age 20) and 21 healthy volunteers(14 mles and 7 females with average age 20.09) at Kyung Hee University were selected. The visual display acquired by scanning of occlusal record in maximal intercuspation was converted into 16 gray value image. Then, using computer program(J & Lee Occlusal Analyser), the pixel which was in definite range of the gray value was recognized, and the numbers of recognized pixel were calculated to area. The results were as follows : (1) On the survey about sports dentistry, 28% of 89 athletes didn't agree that human occlusion may be important, and 30% didn't have any idea of the influence of human occlusion during their sports activities. (2) The average numbers of total occlusal contact points were 31.05 in control group, and 34.67 in athlete group. The average area of total occlusal contacts was $100.25mm^2$ in control group, and $127.78mm^2$ in athlete group. (3) In control group, the average numbers of occlusal contact points were revealed in order as follows; the first molar(8.48), the second molar(8.24), the second premolar(4.71), the lateral incisor(2.90), the first premor(2.43), the central incisor(2.19), and the canine(2.1). The least average in canine(2.1) was similar to the average(2.19) in central incisor and (2.09) in lateral incisor. In athlete group, the average numbers of occlusal contact points were revealed in order as follows; the first molar(8.87), the second molar(8.47), the second premolar(5.60), the canine(3.80), the lateral incisor(3.33), the first premolar(2.67), and the central incisor(1.93). (4) In control group, the average areas of occlusal contact surface were revealed in order as follows; the first molar($39.47mm^3$), the second molar($37.54mm^3$), the second premolar($9.54mm^3$) the first premolar($6.18mm^3$), canine($3.49mm^3$), the central incisor($2.76mm^3$), and the lateral incisor($1.28mm^3$). In athlete group, the average areas of occlusal contact surface were revealed in order as follows; the first molar($44.11mm^3$), the second molar($40.69mm^3$), the second premolar($16.50mm^3$), the first premolar($9.39mm^3$), the canine($5.08mm^3$), the lateral incisor($3.7mm^3$), and the central incisor($2.25mm^3$). (5). With aging in both control and athlete group, there was a decreasing tendancy in average number of occlusal contact point, and was an increasing tendancy in average area of occlusal contact surface. In comparison at each age, both the numbers and area of occlusal contact were greater in athlete group than in control group. It was not significant in the numbers of occlusal contact points beween athlete and control group(p>0.1), but significant in the area of occlusal contact surface(p<0.05). (6) In comparision as to the kind of sports(Gymnastics:2, Rugby:3, Soccor:5, Ice hocky:5), the numbers of occlusal contact points were the most in ice hocky, and the area of occlusal contact surface was the greatest in gymnastics. With increasing a career in athlete group, there was a decreasing tendancy in average numbers of occlusal contact points, and was an increasing tendancy in average area of occlusal contact surface.

UV-A로 유발된 효소 변성에 대한 콘택트렌즈의 차단 효과 (Effects of UV-A Blocking Contact Lenses on the Enzymes Denaturation Induced by UV-A Irradiation)

  • 박미정;이금희;이은경;박상희;김소라;이흠숙
    • 한국안광학회지
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    • 제13권4호
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    • pp.43-49
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    • 2008
  • 목적: 본 연구에서는 UV-A 차단 콘택트렌즈의 UV-A 차단효과를 일반 콘택트렌즈의 효과와 비교하여 보고자 하였다. 방법: RNase A, catalase 및 superoxide dismutase(SOD)를 일반 콘택트렌즈(UV-A 차단율 20%) 및 자외선 차단 콘택트렌즈(UV-A 차단율 85%)로 차단하였을 때의 UV-A에 의한 변성을 아크릴아미드 겔 전기영동법으로 확인하였다. 효소의 용액은 각각 1, 3, 6, 24 및 96시간 동안 365 nm의 UV-A에 노출시켰으며, 콘택트렌즈에 의한 UVA차단 범위는 전안구를 덮는 RGP 렌즈, 소프트 콘택트렌즈, 안경의 크기를 계산하여 각각 50%, 70% 및 100%로 변화를 주었다. 결과: RNase A, catalase 및 SOD의 변성은 UV-A에 노출된 시간이 길어질수록 심하여졌다. 자외선차단 콘택트렌즈의 자외선 차단 효과는 일반 콘택트렌즈와 비교하여 보았을 때 모든 효소에서 차단 효과가 있음을 확인하였다. 콘택트렌즈로 차단된 범위가 줄어들수록 또한 UV-A에 노출된 시간이 길어질수록 자외선 차단 콘택트렌즈의 차단 효과는 감소됨을 알 수 있었다. 결론: 이상의 결과로 미루어 UV-A에 장시간 노출되었을 경우 자외선 차단 콘택트렌즈는 안구 내의 존재하는 효소를 보호하는 효과가 미흡할 것으로 생각되며, 따라서 햇볕 아래에서의 장시간 콘택트렌즈 착용은 충분한 고려를 하여야 할 것으로 제안할 수 있다.

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탑상형 초고층 주거건축의 단위평면 특성에 관한 연구 - 외기접합 면수별 공간구성 특성을 중심으로 - (A Study on the Characteristics of an Unit Plan for a Tower Type Super-High-Rise-Residence)

  • 이용광
    • 한국실내디자인학회논문집
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    • 제13권5호
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    • pp.90-97
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    • 2004
  • The purpose of this study is to grasp the spatial characteristic of the unit plan for a Super-High-Rise-Residence. This study is focused on the open air contact sides for a tower type Super-High-Rise-Residence. A tower type Super-High-Rise-Residence which has open air contacts from 1 to 3.5 sides differed in spatial characteristics of the unit plan for other apartment units. The current study analyzed 188 unit plans for the size of 40 pyong or larger in Seoul and the metropolitan areas which have been built since 1990. Open air contact side was classified as under 2 sides, 2 sides, and over 2 sides. The unit plan which belong to each open air contact side was Investigated according to the location of public area, the relationship between livingroom and master bedroom, and a method of entry to the master bedroom. The results of this study are as follow: According to increase open air contact sides is changed the location of public area in unit plan from an typical arrangement to various arrangement. Also the relationship between livingroom and master bedroom becomes loose and in a method of entry to the master bedroom increase an indirect approach through other room.

암석 절리면 거칠기의 새로운 3차원 정량화 계수 (A New Coefficient for Three Dimensional Quantification of Rock Joint Roughness)

  • 박정욱;이용기;송재준;최병희
    • 터널과지하공간
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    • 제22권2호
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    • pp.106-119
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    • 2012
  • 암석 절리면의 거칠기는 대부분 2차원 프로파일의 기하학적 특징에 초점을 맞추어 기술되어 왔다. 그러나 거칠기를 합리적으로 평가하기 위해서는 수직 및 전단하중하에서 실제 접촉 상태에 놓여 발현되는 유효 거칠기 특성을 적절히 반영할 수 있어야 한다. 본 연구에서는 편마암 인장 절리의 복제 시험편에 직접전단시험을 수행하고 전단 방향에 따른 강도 및 거칠기 특성을 고찰하였다. 이 과정에서 절리면의 3차원 형상을 삼각형 요소의 집합으로 재구성하고, 각 요소의 거칠기를 전단 방향에 따른 활성, 비활성 미세거�s각을 이용하여 정의하였다. 수치적 알고리즘을 이용하여 최대전단강도 발현 시 접촉면의 위치와 면적을 예측한 결과, 접촉면의 분포는 미세 거�s각의 분포와 밀접한 관계를 보였으며, 활성거�s각을 갖는 요소만이 전단 거동에 주도적인 역할을 수행하였다. 따라서 활성거�s각의 분포 특성을 모사할 수 있는 확률밀도함수를 제시하고, 이 과정에서 얻어지는 활성거칠 기계수 $C_r$을 암석 절리면의 새로운 거칠기 정량화 계수로 제안하였다. 각 시험편에 대한 전단방향에 따른 $C_r$과 실험 결과를 비교한 결과, $C_r$이 절리면의 거칠기를 정량화하고 전단 강도를 예측하는 데 있어 매우 유용한 파라미터임을 확인하였다.