• 한국전기전자재료학회논문지
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• 제24권6호
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• pp.519-524
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• 2011

ABLB (alternate binaural loudness balance) test is one of the medical assessments to diagnose detailed lesion of sensory-neural hearing loss based on a recruitment phenomenon. However, current ABLB audiometry takes an operational model, so called face-to-face model, in which model one audiometrist can assess only one subject at a time. As a result, this face-to-face model leads to expensive audiometrist's labor cost and lengthy wait when there exist many subjects. As a solution, this paper suggests an ABLB audiometry system supporting one-to-many model in which model an audiometrist enables to assess several subjects concurrently. By providing such capabilities as real-time transfer of assessment result, video monitoring of subject and video chat, this solution can provide same effect as face-to-face model but overcome weakness of the existing face-to-face model.

• 수산해양기술연구
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• 제50권1호
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• pp.1-11
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• 2014

To compare the catches made using gillnets, trammel nets, and gillnets with supporting lines, several experiments were conducted with commercial vessels near Uljin and Pohang in Eastern Korea between July 2010 and May 2011. Two sets of 13 different nets were used, including 5 panels of gillnets and trammel nets each with stretched mesh sizes of 7.6, 9.1, 10.6, 12.1, and 13.6 cm and 3 panels of gillnets with a mesh size of 9.1 cm with supporting lines with different line spacing. The outer (stretched) mesh size of the trammel nets measured 51.5 cm. The target fishes of the fishing nets were various types of flounders. The catch rate of flounders was 50.7% of the total catch in weight. The total catch for all nets was 443.8 kg. The predominant species was pointhead flounder (Cleisthenes pinetorum). The total catch by trammel nets was 1.4 times that of the comparable gillnets. But more pointhead flounder were caught by gillnets than by trammel nets, though there was no significant difference. Fishermen catching the pointhead flounder in Korea said that there was no need to use trammel net to catch it; this was an unexpected finding compared to the findings of other flounder fisheries. The amounts of roughscale sole, brown sole, and blackfin flounder caught by trammel nets were greater than those caught by gillnets. The mean lengths (standard deviation) of blackfin flounder, pointhead flounder, brown sole, and roughscale sole were 21.0 (4.57), 22.9 (3.40), 24.7 (4.90), and 28.3 (5.43) cm, respectively; there were significant differences in mean length (p < 0.00001). Therefore, in order to catch flounder efficiently, the fishing nets and mesh size should be chosen according to the target species. One advantage of using supporting lines is that it prevents breakage by strengthening the material especially when utilized on a rough bottom. Catch by using gillnet with supporting lines was not greater than that by using trammel net for the conservation of fisheries resources.

• 한국산학기술학회논문지
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• 제19권11호
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• pp.635-644
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• 2018

수술실 욕창 예방을 위한 간호 실무지침 현황 및 적용실태를 조사하기 위한 서술적 조사연구이다. 서울, 인천, 경기지역의 상급 종합병원 4개와 전문병원 3개를 온라인 무작위화 프로그램을 이용하여 선정하였고 선정된 수술실에서 6개월이상 근무경력을 가진 수술에 직접 참여하는 간호사를 대상으로 하였다. 자료 수집 기간은 2018년 1월부터 4월까지였고 설문지는 총 150명에게 배부하여 129명에게 회수(회수율 86%)하였다. 수술실 간호사들은 측위 43명(33.3%), 앙와위 37명(28.7%), 복와위 36명(27.9%)이 수술 체위 대상자들에게 욕창예방 간호 경험을 갖고 있고 주로 사용하는 지지표면은 젤 102명(79.1%), 스폰지 62명(48.1%), 솜 47명(36.4%)이었으며 지지표면 사용 전후로 2회(90명, 69.8%) 피부사정을 실시하지만 욕창위험 사정을 위해 특별한 도구를 사용하지 않았고(76명, 58.9%) 지지표면 사용 여부를 결정하는 요인으로 수술 체위(83명,64.3%)를 지지표면 사용 여부를 결정하는 수술 소요 시간은 2시간 이상(49명,38.0%)임을 확인하였다. 수술실 간호사들이 수술 대상자들에게 욕창예방 간호을 위해 주로 사용하는 지지표면이 젤, 스폰지, 솜이었으며 지지표면 사용 여부를 결정하는 요인으로 수술 체위를 지지표면 사용 여부를 결정하는 수술 소요 시간은 2시간 이상임을 확인하였다.

• 대한토목학회논문집
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• 제26권5C호
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• pp.351-358
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• 2006

본 연구의 목적은 원심모형실험으로 담수에 따른 CFRD 차수벽의 거동을 모사하는 방법 및 절차를 제시하고, 실험결과로 부터 콘크리트차수벽의 휨강성이 차수벽의 변위에 미치는 영향을 살펴보고, 원심모형실험으로 검증된 수치해석을 통하여 차수벽지지죤 강성이 차수벽콘크리트의 변위와 모멘트에 미치는 영향을 평가하는 것이다. 이를 위하여 실제 운영 중인 D댐에 대해 차수벽의 강성을 2가지로 변화시킨 원심모형실험을 수행하였고, 모형체의 축조재료에 대한 삼축압축실험을 수행하고 그 결과를 입력치로 한 수치해석을 통해 원심모형실험을 모사하였다. 모사된 수치해석 결과를 실험결과와 비교하여 수치모형의 적정성을 확인하고 확인된 수치모형에 대해 지지죤 강성을 변화시킨 수치해석을 수행하여 지지죤 강성변화에 따른 콘크리트 차수벽의 연직변위 및 모멘트 발생 양상을 분석하였다. 차수벽 두께를 2가지로 달리한 원심모형실험 결과, CFRD 차수벽 변위는 차수 목적의 콘크리트 두께 범위 내에서는 두께의 영향이 거의 없는 것으로 나타났다. 원심모형실험과 수치해석 결과로부터 담수 시 CFRD 차수벽의 변위 및 최대변위 발생위치는 콘크리트차수벽 휨강성에는 영향이 거의 없고, 차수벽지지죤의 강성이 큰 영향을 주는 것으로 나타났다.

• 대한가정학회지
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• 제47권6호
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• pp.91-108
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• 2009

The aim of this study was to assist the development of parenting-aid policies by analyzing information from life perspectives, family system theory, and integrated family policy perspectives. For this purpose, we conducted a literature using a variety of sources including internet sites, laws, published material related to current parenting-aid policies. Based on analyses we formulated four agendas: empowering parent competency, supporting diverse family parenting, guaranteeing parent's rights, and supporting parenting of dual-income families parenting. The results were as follow: Firstly, for empowering parent competency, we proposed the development of family relationship empowerment programs including family life cycle and children-raising support services. Secondly, for diverse family parenting, we proposed access to integrated parenting-aid programs dependent on family types. Thirdly, for guaranteeing parent’s rights, we proposed the supporting of child raising costs and tax returns to families with children, and provide child allowances. Finally, for dual-income family parenting, we proposed that schools and communities must recognize that dual-income families are a universal family type, establish family friendly business culture, and to develop a more democratic domestic family-relationship. This policy proposed a new paradigm where parents must be recognized as partners and stakeholder in development of family related policies. Ultimately, such policies will contribute to increased birth rate and development of a more respectful society.

• 대한치과보철학회지
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• 제27권2호
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• pp.79-100
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• 1989

The Purpose of this study was to investigate material differences in stress transmission among various artificial teeth and denture base materials. For this study, a two-dimensional finite element model and a two-dimensional photoelastic model of a mandible with complete denture were made. A resin tooth and a porcelain tooth were used as artificial teeth, and a resin base, a metal lined base, and a soft-liner lined base were used as denture bases. An occlusal load was applied and principal stresses generated in the supporting tissues were compared. To test the impact stress transmission, strain gauge attached to the denture base specimens made of the different materials were made in thick and thin groups. Voltage outputs from hitting the specimen with a steel ball were compared. The results were as follows : 1. In FEM, increasing the mucosal thickness reduced the maximum principal stresses in the supporting tissues, but altering the tooth materials and the base materials induced no difference in the stresses. 2. In photoelastic model study, no difference in fringe order among the specimens were observed, but the thick mucosa group and the soft-liner lined group revealed a more uniform distribution of the load. 3. In strain measuring, the impact force transmission was highest in the soft-liner lined group, and was the lowest in the metal lined group(p<0.01). 4. In the thin group using the resin base, the porcelain tooth showed higher impact stress transmission than the resin tooth(p<0.01), but no difference was observed between them in the thick group. In the soft-liner lined group, the porcelain tooth showed higher impact stress transmission than the resin tooth(p<0.01), but no difference was observed between them in the metal lined group. 5. The thick group showed lower impact stress transmission than the thin group(p<0.01).

• 대한공간정보학회지
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• 제18권1호
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• pp.41-46
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• 2010

최신 다차원 공간정보기술은 대학 내의 수많은 시설들에 대한 효율적 시설물관리 지원업무, 사업비 예산편성 및 관리 등의 예산편성 의사결정지원업무, 그리고 입시홍보 등을 수행하는 자료로 그 중요성이 부각되고 있다. 따라서 본 연구에서는 대학의 시설물관리를 위한 다차원 공간정보를 구축하여 신규 건축예정인 건물에 대해 공간 활용을 극대화할 수 있는 최적의 입지를 선정하였으며, 대학 상징물 이전에 따른 적지분석, 외부 환경변화에 따른 경관분석 등을 수행하였다. 그 결과 시설물 계획.관리의 합리화로 인한 대학의 쾌적한 공간조성 및 체계적 종합발전과 예산편성 또는 집행 시의 의사결정지원 등으로 중복투자방지와 예산절감 등의 효과를 극대화할 수 있는 것으로 나타났다.

• 대한치과보철학회지
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• 제31권4호
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• pp.468-481
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• 1993

The Purpose of this study was to analyze the stresses and displacements of various post and core. The Finite element models of central incisors were divided into seven types according to the various amount of remaining tooth structures. $10kgf/mm^2$ force was applied respectively as follows : 1) Horizontal on the labial surface 2) $26^{\circ}$ diagonal direction on the lingual surface. Material property, geometry, and load condition of each model were inputted to the two dimensional ANSYS 4.4A finite element program : stresses and displacements were analyzed. Results were follows : 1. In the case of $130^{\circ}$ shoulder post and core, Maximum tensile and shear stresses were observed in the crown margin. 2. Maximum shear stress was about 29% reduced by contrabevel. 3. In the case of 1mm axial tooth structure, Maximum tensile stress observed in the dentin. 4. In the case of but joint of cervix, Maximum stress concentration was observed in the dentin by the inclined and horizontal force. 5. Horizontal force produced the extraordinary high stresses in dentin and supporting structures. 6. The amount of remaining tooth structure affected the level of stress significantly and it determined the location of stress concentration.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.652-655
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• 2009

The bimodal porous carbons were synthesized by using imprinting method with templates of SBA-15 particle and silica sphere and applied as supporting materials for the electro-catalyst of polymer electrolyte fuel cell (PEFC). The silica spheres with diameter size of 100 nm and SBA-15 particle having 200 nm -250 nm diameter and 700 nm -900 nm length were synthesized in this work. The bimodal porous carbons (S100) were prepared by using the silica spheres and SBA-15 as templates and mesophase pitch as a carbon source. The PtRu nanoparticle of ca. 1.9 nm were supported on the bimodal porous carbon support and the resulting PtRu/S100 catalysts was tested by the cyclic voltammetry. The use of bimodal porous carbon showed in comparable electro-catalytic activities with commercial catalyst. Though unclear effects of bimodal porosity of supports could be obtained in the scope of this study, morphological advantage in electrical conductivity can be considered on the electro-catalytic activity.

• Wind and Structures
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• 제21권6호
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• pp.625-639
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• 2015

Monopiles have been most widely used for supporting offshore wind turbines (OWTs) in shallow water areas. However, multi-member lattice-type structures such as jackets and tripods are also considered good alternatives to monopile foundations for relatively deep water areas with depth ranging from 25-50 m owing to their technical and economic feasibility. Moreover, jacket structures have been popular in the oil and gas industry for a long time. However, several unsolved technical issues still persist in the utilization of multi-member lattice-type supporting structures for OWTs; these problems include pile-soil-interaction (PSI) effects, realization of dynamically stable designs to avoid resonances, and quick and safe installation in remote areas. In this study, the effects of PSI on the dynamic properties of bottom-fixed OWTs, including monopile-, tripod- and jacket-supported OWTs, were investigated intensively. The tower and substructure were modeled using conventional beam elements with added mass, and pile foundations were modeled with beam and nonlinear spring elements. The effects of PSI on the dynamic properties of the structure were evaluated using Monte Carlo simulation considering the load amplitude, scouring depth, and the uncertainties in soil properties.