• 한국심리학회지 : 문화 및 사회문제
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• 제29권3호
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• pp.341-359
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• 2023

본 연구는 대학생의 다문화 접촉경험이 다문화 역량에 미치는 영향을 살펴보고, 조망수용과 편견의 매개효과를 알아보고자 하였다. 다문화 접촉은 양적인 측면과 질적인 측면으로 구분하였고, 접촉의 양과 질 각각이 조망수용과 편견을 통해 대학생의 다문화 역량에 미치는 영향을 살펴보았다. 총 642명의 대학생이 접촉, 일상의 다문화 역량, 조망수용, 편견 등을 포함한 질문지에 응답하였다. 분석 결과, 접촉의 양과 질 모두가 다문화 역량에 유의미하게 관련되는 것으로 나타났으나, 접촉의 질적인 측면이 양적인 측면에 비해 다문화 역량에 미치는 영향력이 더 높은 것으로 나타났다. 또한 조망수용과 편견은 접촉의 질과 다문화 역량의 관계를 유의미하게 매개하는 것으로 나타난 반면, 접촉의 양과 다문화 역량의 관계는 매개하지 않는 것으로 나타났다. 이러한 결과는 다른 문화적 배경을 가진 집단과의 교류가 친밀하고 긍정적일 때 조망수용 증진과 편견 감소를 통하여 다문화 역량 함양이 이루어짐을 보여 주는 것이다. 따라서 향후 대학생의 다문화 역량 증진을 위한 프로그램은 교류의 질적인 측면에 집중하여 조망수용 증진과 편견 감소가 이루어질 수 있도록 계획되어야 할 것이다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2020년도 추계학술대회
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• pp.75-77
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• 2020

There was an outbreak of COVID-19 on the Diamond Princess cruise ship. Distinguishing close contacts is the important problem to be addressed. Close contacts mean people who stays with the patients of disease like COVID-19 over a period of time. The passenger position on board can be obtained by indoor positioning technology. The feature of close contacts is similar location with COVID-19 patients. Therefore, this paper proposed the idea of distinguishing close contacts on board based on DBSCAN algorithm.

• ETRI Journal
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• 제24권5호
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• pp.349-359
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• 2002

With Ni/Au and Pd/Au metal schemes and low temperature processing, we formed low resistance stable Ohmic contacts to p-type GaN. Our investigation was preceded by conventional cleaning, followed by treatment in boiling $HNO_3$:HCl (1:3). Metallization was by thermally evaporating 30 nm Ni/15 nm Au or 25 nm Pd/15 nm Au. After heat treatment in $O_2$ + $N_2$ at various temperatures, the contacts were subsequently cooled in liquid nitrogen. Cryogenic cooling following heat treatment at $600^{\circ}C$ decreased the specific contact resistance from $9.84{\times}10^{-4}$ ${\Omega}cm^2$ to $2.65{\times}10^{-4}$ ${\Omega}cm^2$ for the Ni/Au contacts, while this increased it from $1.80{\times}10^{-4}$ ${\Omega}cm^2$ to $3.34{\times}10^{-4}$ ${\Omega}cm^2$ for the Pd/Au contacts. The Ni/Au contacts showed slightly higher specific contact resistance than the Pd/Au contacts, although they were more stable than the Pd contacts. X-ray photoelectron spectroscopy depth profiling showed the Ni contacts to be NiO followed by Au at the interface for the Ni/Au contacts, whereas the Pd/Au contacts exhibited a Pd:Au solid solution. The contacts quenched in liquid nitrogen following sintering were much more uniform under atomic force microscopy examination and gave a 3 times lower contact resistance with the Ni/Au design. Current-voltage-temperature analysis revealed that conduction was predominantly by thermionic field emission.

• Journal of Oral Medicine and Pain
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• 제20권1호
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• pp.133-139
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• 1995

The aim of this study was to investigate the state of anterior tooth contacts in patient with internal derangement of TMJ. We have investigated the change of the number of tooth contacts after conservative treatment including stabilization spint in 83 patients with TMJ internal derangemnet who visited the Orofacial Pain Clinic, Dept of Oral Diagnosis, Seoul National University Dental Hospital. The obtained results were as follows : 1. The gender ratio of patients was 1:3.7(M:F) 2. The number of patients with bony changes in TMJ was 17(20.5%) 3. The number of patients with absence of incisor tooth contacts was 73(88%) 4. The number of Tooth contacts after treatment was decreased compared with that before treatment in both groups. However there was no significant difference between groups 5. There was the decrease in the number of tooth contacts in 12(76%) of 17 patients with bony changes in TMJ and in 23(34.8%) of 66 patients without bony changes in TMJ. 6. The ratio of patients who showed the decrease of the number of tooth contacts was higher in patients with bony changes in TMJ than patients without bony changes in TMJ. 7. After conservative treatments with stabilization splints in patients with TMJ internal derangement, the possibility of the decrease in the number of tooth contacts had no relationship with the presence of incisor tooth contacts. However, the incidence was higher in patients with bony changes in TMJ.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.82-84
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• 2003

In case contact between point of contacts is not achieved well, contact resistance is grown, and by current concentration at current conducting contacts can weld. In order to decrease contact resistance between contacts in case of busbar, installing spring between fixed contact and moving contact. and then force on faying surface of contacts increase and contact resistance decrease. But, in case increase force of spring to widen contact area, operating force moving contact can grow, on the contrary force of spring is small, contact resistance becomes low. Therefore, need to optimize force and number of spring. position, and also need to examine force change on contact surface at point of contact moving. In this paper, dynamic kinetics analysis for force on faying surface of contacts is performed at unsteady state. It is showed to not uniform force on surface between contacts, and we can got more uniform force by means of change spring position.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
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• pp.522-525
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• 1995

A manipulation of a multiple contacted object by a Rotational Base and Single-jointed Finger mechanism(RBSF mechanism) is discussed. The manipulation is characterized by multiple contacts on an object and large motions of the object with sliding contacts. The kinematics and dynamics allowing sliding at multiple contacts are explored. The conditions for manipulation of an object at multiple contacts by the RBSF mechanism, which cannot exert arbitrary contact forces because it has a fewer number of joints than is required for active control, is presented.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1988년도 추계학술대회 논문집
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• pp.112-114
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• 1988

W/WC-Cu/Ag contacts of 60wt%-40wt% base and contacts with additives(Ni, Co, C) of 1wt% below were prepared by a press-sinter-infiltrate process to compare with their physical properties and arc erosion characteristics. In physical properties, electrical conductivity of contacts with additive is lower than that of base contacts but hardness is higher. The results of arc test show that the erosion rate of contact with -0.1wt% Ni is decreased.

• 한국철도학회논문집
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• 제15권6호
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• pp.597-603
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• 2012

본 연구에서는 바이어스 궤도계전기의 접점재료를 선정하는데 있어 Ag 접점과 AgC 접점의 문제점을 분석하고, 안전성을 평가하는데 목적이 있다. 접점의 용착실험과 반복개폐 실험을 실시하여 접점의 특성을 알아보았다. 실험 결과, Ag 접점은 비교적 낮은 전류에서 용착이 발생하였고, AgC 접점은 온도특성이 우수하여 대전류에서도 용착이 발생하지 않았다. 반복개폐 실험에서는 AgC 접점의 개폐횟수가 증가할수록 저항이 불안정하고 접점에 전이현상이 발생하여 접점소모가 큰 것으로 나타났다. 연구 결과, AgC 접점은 용착특성에서는 우수하나 반복개폐 실험에서 저항변화가 많아 사용상 주의가 요구되며, Ag 접점은 반복개폐 특성은 우수하나 용착특성에서 취약한 것으로 나타났다.

• Journal of Oral Medicine and Pain
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• 제10권1호
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• pp.33-39
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• 1985

Changes of occlusal contacts after E.M.G. biofeedback therapy with D.D.S. (Self control system, EMG 220, Sandiago California) was investigated in 20 SNUH students and residents with normal occlusion. Treatment time was 30 minutes on every subject. Occlusal contacts of before biofeedback therapy were taken at 4: 00 P.M. and that of after biofeedback therapy were taken at 4:40 P.M. Author compared the occlusal contacts before biofeedback therapy with that of after biofeedback therapy. The obtained results were as follow : 1. The number of occlusal contacts was 23.9, before biofeedback therapy and, 26.3, after biofeedback therapy. 2. The percentage of accentuated contact to diffuse contact was 78.5%, before treatment and 38.8% after treatment. 3. 6 heaviest contacts were changed 4.3 teeth per one subject after biofeedback therapy.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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• pp.376-378
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• 1988

W/CE system contacts were manufactured f a press sinter-infiltrate process to compare with their arc erosion mechanism. The results of arc switching test show that erosion rate of contacts is dependence of test current and there is difference in the erosion rates between W contacts and WC contacts. At high current of 1000A erosion rate of W contacts is critically increased by formation of surface cracks. In especial arc anti-erosion is improved by Hi additive.