• 한국자기학회지
• /
• 제19권5호
• /
• pp.176-179
• /
• 2009

Sputtering 방법으로 유리기판위에 50-nm Fe 박막을 증착하여 박하우젠 현상을 연구하였다. 실험실 자체 제작 장비인 광자기 현미경을 사용하여 박하우젠 점프가 일어나는 동안 자구 이미지를 촬영함으로써 박하우젠 현상을 실시간으로 직접 관찰하였다. 자구 이미지들을 관찰한 결과 박하우젠 점프가 같은 실험조건에서 측정되었음에도 불구하고 매우 무작위적인 모습을 보이는 것을 확인하였다. 1000번 이상의 측정을 통해 박하우젠 점프크기의 통계분포를 구하였는데, 점프크기의 분포가 거듭제곱법칙 분포를 보임을 확인하였고, 임계지수는 1.14 $\pm$ 0.03의 값을 보임을 확인하였다.

• 한국포장학회지
• /
• 제28권3호
• /
• pp.211-215
• /
• 2022

Air distribution occupies an important position in the smart unit load container design process for agricultural products. Inner air may be uncomfortable because of its temperature, speed, direction, and volume flow rate. It doesn't matter how efficient the ventilation equipment is if the air is not distributed well. The main aim of this study was to design the inlet and outlet fan locations of smart unit load container for agricultural products. A numerical study was performed on the effects of the location of inlet air and outlet air in relation to the container cooling sources on air distribution and thermal comfort. A concept of combining inner container cooling sources with the exhaust outlet was employed in this investigation. Also, in this research, the developed CFD (Computational Fluid Dynamics) models were thoroughly validated. This system was adopted for use in container spaces, where the exhaust outlet was located. In this study, the location of the inlet was derived through CFD for a container with a size of 1,100×1,100×1,700 mm, and it was derived that the inlet was located at the center of the lower part of the container for efficient air flow. It was efficient to position the outlet through the air inlet in the center of the lower part of the container at the top of the same side.

• 한국의류학회지
• /
• 제43권6호
• /
• pp.877-890
• /
• 2019

This study investigated the location of grading lines and grading amount defined by 17 women's wear brands for a pants item by target age groups (20-30, 30-40, and 40-50). This study utilized 6th Size Korea data and a script-based on a 3D scan measurement program to analyze the increase rate of body size in order to suggest a grading deviation distribution ratio for the pants using regression analysis. This study found that most brands appropriately divided grading amount at front thigh girth and back hip girth into the side and center by 1:1. Most brands divided the grading amount at the front hip girth into the side and center by 1:1; however, the ratio found from Size Korea is 0.8:1.2 for the 20-30 age group, 0.7:1.3 for the 30-40 age group, and 0.6:1.4 for the 40-50 age group. Regarding the back thigh girth, the brands targeting 20-30s, 30-40s, and 40-50s respectively assigned the grading amount into the side and center by 1:1, 1:1.2, and 1:1.3. However, the ratio found from Size Korea is 1.4:0.6 for the 20-30 age group, 1.7:0.3 for the 30-40 age group, and 1.3:0.7 for the 40-50 age group. The results can be utilized in improving the grading system of the pants item.

• 대한통합의학회지
• /
• 제5권4호
• /
• pp.1-9
• /
• 2017

Purpose : This study was conducted among 195 adults in their 20s. To analyze the impact of the slope types of the scapulae on the plantar surface of the foot, the average pressure (AP), the maximum pressure (MP), the average of local distribution values, and the average movement of the center of pressure (COP) of the different slope types of the scapulae were compared. Method : The anterior-posterior slopes of the scapulae were measured by comparing the slopes of the left and right sides of the scapulae based on the differences in the height and the slope of the coracoid process and the angulus inferior scapulae. Those whose left side of the scapulae had an anterior slope were categorized as type 1, and those whose right side of the scapulae had an anterior slope, as type 2. The average plantar pressure, the center of plantar pressure, the maximum plantar pressure, and local distribution values were analyzed using a plantar pressure analyzer of the FSA. Result : In terms of the AP of the left and right feet, there was no statistically significant difference both in types 1 and 2 on the left and right feet. The comparison results of the MP and the average of local distribution values of the two slope types of the scapulae showed that there was no statistically significant difference on the X-axis both in types 1 and 2 on the left and right feet, but that there was a large statistically significant difference on the Y-axis both in types 1 and 2. That is, the MP of the right foot of the left anterior slope type was located more on the hindfoot than that of the right anterior slope type, and the MP of the left foot of the left anterior slope type was located more on the hindfoot than that of right anterior slope type. Conclusion : This study can be used as fundamental data to predict differences in the location and size of the COP and changes in plantar pressure distribution depending on the slope types of the scapulae, and control the distribution for therapeutic purposes.

• 벤처창업연구
• /
• 제11권2호
• /
• pp.233-247
• /
• 2016

세계적으로 확산되고 있는 로컬푸드산업은 한국에서도 도입되어 활성화되어가고 있다. 한국의 농산물 시장에서 유통비용이 차지하는 비율이 높은 것이 문제점이다. 유통비용 증가는 운송거리와 관련이 있다. 농산물의 유통비용증가는 가격과 품질 뿐만 아니라 온실가스(이산화탄소) 배출량 증가의 원인이 된다. 따라서 이러한 온실가스 배출을 저감 하고, 비효율적인 로컬푸드산업의 유통비용 문제를 해결하는 것이 필요하다. 본 논문에서는 로컬푸드산업의 지역거점센터 입지선정 요인을 접근성, 품질, 인구, 면적, 운송거리 5가지 요소로 선정하였다. 5가지 요소들의 상대적 중요도를 전문가 30명의 설문 응답지 내용을 반영하여 Analytic Hierarchy Process를 활용하여 분석하였다. 각 의사 결정 기준의 상대적 중요도는 품질(0.430)${\gg}$인구(0.262)${\gg}$운송거리(0.201)${\gg}$접근성(0.075)${\gg}$면적(0.033) 순으로 입지선정에 중요한 요소로 분석되었다. 본 논문에서 제시한 로컬푸드산업의 환경경영시스템 모델을 적용 분석하여, 로컬푸드산업의 지역거점센터 입지선정 평가 기준과 온실가스 저감의 효과를 분석하였다. 본 논문은 로컬푸드산업의 환경경영시스템의 모델을 적용 분석함으로서, 로컬푸드산업의 온실가스 문제를 해결하는 자료로 사용 될 것이다. 또한 기초자치단체 단위의 로컬푸드산업 운영을 위한 직매장 운영 결정 자료로 활용될 것이다. 그리고 로컬푸드산업의 경쟁력을 강화시켜, 대형유통업체와의 비교 우위를 가지는 자료로 사용될 것이다.

• 한국실내디자인학회논문집
• /
• 제16권6호
• /
• pp.197-204
• /
• 2007

In the spatial configuration of room-to-room art museums, openings and walls are important physical factors, and openings are a medium for connecting spaces. Also, by spatially composing walls and openings, spaces can be connected visually and physically, and movements and directions may vary depending on the location or size of walls and openings. In this study, 5 museums are investigated: Sainsbury Wing in London, Gemaldegalerie In Berlin, Alte Pinakotkek in Munich, Neue Pinakothek in Munich, and Staatsgalerie Stuttgart in Stuttgart. Using DepthMap program, the characteristics of visual-spatial composition of each museum are derived by comparing the Connectivity, Visual integration, and Isovist maximum radial. From an analysis of spatial distribution, a relationship with visibility is investigated. The results of this study showed that the combination of visual axial lines affect the spatial configuration of the room-to-room museums. Depending on the location of opening, the museums can be classified as follows: 1) Museums with the 1st visual axial line and the 2nd and 3rd auxiliary visual axial lines ; 2) museums with several equal visual axial lines; and 3) museums with only center axial line.

• 구강회복응용과학지
• /
• 제20권1호
• /
• pp.9-17
• /
• 2004

In this study, the biomechanical characteristics of Kimplant were compared with that of Branemark implant by using three dimensional finite element analysis. Two finite element models were fabricated by inserting each implant into the bone model. The bone model was designed to have 18mm height, 13mm width and 15mm length. The size of each implant was planned to have 4mm width and 10mm length. A 200N force was applied on the center of abutment top in three directions - vertical, horizontal and oblique. After analyzing the stresses of fixture and surrounding bone, following results were obtained. 1. There was similar stress distribution between the two models. 2. The magnitude of maximum principal stress on the implant was similar between the two models but the location of maximum principal stress on the implant was different. 3. The magnitude and location of maximum principal stress on the surrounding bone was similar between the two models.

• Journal of Chest Surgery
• /
• 제16권4호
• /
• pp.594-601
• /
• 1983

Mediastinal tumors have long fascinated the thoracic surgeon because of their variety and unpredictability of diagnosis prior to exploration. We report the analysis of the 110 cases of mediastinal tumors, experienced in the dept. of the thoracic and cardiovascular surgery of the National Medical Center from December 1959 to August 1983. The age distribution was relatively even and the mean age was 37 years old. The germ cell tumors were 29 cases [31%], the neurogenic tumors were 19 cases [20%], the thymomas were 16 cases [17%], the lymphomas were 8 cases [8.5%], the primary or secondary carcinomas were 11 cases [12%], the bronchogenic and the P.W cysts were 4 cases, the mesenchymal tumors were 3 cases, the TB gangliomas were 3 cases among the 94 cases, histologically analysed. The malignant tumors were 39 cases [41%]. In classified by histological types, the tumor size, location and the clinical manifestations are presented. The successful removal was done in 53 cases [96%] among 55 cases of benign mediastinal tumors. In 39 malignant cases, the surgical intervention had been done in 21 cases [54%], and inoperable cases were 16 [41%], and the operative deaths were 2 cases [5%].

• Journal of Chest Surgery
• /
• 제26권12호
• /
• pp.940-943
• /
• 1993

Mediastinal tumors have long fascinated the thoracic surgeon of their variety and unpredictability of iagnosis prior to exploration.We report the analysis of the 34 cases of mediastinal tumors,experenced in the dept.of the Thoracic and Cardiovascular Surgery of the National Medical Center.Between the 1993.9-1992.12. The age distribution was relatively even and the mean age was 35 years old.The thymomas were 16 cases [ 47% ].the lipoma were 4 cases [12%].the germ cell tumors were 7 cases [20%].the neurogenic tumors were 3 cases [8%].Histologically analysised .The malignant tumors were 16 cases [17.6%] in classified by hisotlogical types.the tumor size,location,and the clinical manifestation are presented.The successful removal was done in 28 cases [ 100%] among 28 cases of benign mediastinal tumors. Among the 6 cases of malignancy mediastinal tumors, the surgical intervention had done in 5 cases [ 83%] and inoperatable cases were 1 case [16.6%].There was no operative death.

• 한국결정성장학회지
• /
• 제32권3호
• /
• pp.115-120
• /
• 2022

반도체 웨이퍼용 실리콘 잉곳 제조과정에서 사용되는 석영유리 도가니 내측표면의brownish ring (BR)에 대해 연구하였다. BR의 크기는 20~30 ㎛이고 비대칭 갈색 고리형태이다. 도가니 위치에 따라 BR의 크기와 분포가 상이하며, Si 잉곳 성장시 도가니 온도가 가장 높은 round 부가 가장 크고 많았다. BR은 석영유리보다 열팽창계수가 큰 cristobalite를 함유하고 있어 표면 crack이 나타나는 것으로 판단된다. BR의 발색 현상과 p in hole은 산소 결손에 의한 것으로 생각된다.