• Proceedings of the KIPE Conference
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• 2003.07b
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• pp.876-879
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• 2003

본 논문은 전동차용 추진제어장치의 재점착제어에 관한 것이다. 본 연구에서는 공전검지 방법에 대하여 기술하고, 등가 관성량을 이용한 추정재점착제어에 관하여 제시한다. 서울시 6호선 국산화 전동차(609편성)와 광주도시철도 1호선 전동차에 적용하여 재점착 제어성의 우수함과 안정성을 검증 하고자 한다.

• 기계와재료
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• v.22 no.1
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• pp.14-21
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• 2010

초미세 레이저 가공기술은 미세화, 대면적화, 고속화의 방향으로 발전되고 있다. 이에 따라 이를 대응한 레이저의 사양도 파장의 단파장화 또는 펄스폭의 극초단화, 펄스 반복률의 고반복률화, 출력의 고출력화가 요구되고 있다. 극초단 펄스레이저는 사용자 편의성, 안정성 측면에서 산업체의 요구에 미흡하다. 이에 따라 산업용 초미세 레이저 가공을 위한 광원으로 고품질, 고출력의 단파장 자외선 레이저 활용에 집중하고 있다. 현재 고품질 자외선 레이지는 DPSSL 형태로 구성되어 출시되고 있고, 거의 대부분 수입에 의존하고 있다. 국내외 자외선 UV 현황을 간단히 기술하고, 광주과기원 고등광기술연구소에서 산업원천기술개발사업의 일환으로 개발중인 복합형 자외선 DPSSL에 대한 개발 계획 레이저 특성과 현재의 개발 진행 상황을 소개한다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.29 no.3
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• pp.254-260
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• 1984

As a basic study for development of early wheats an experiment was carried out at four sites of Korea by use of 60 varieties. Analysis of variance for heading and maturing dates revealed that there were highly significant among varieties, but not significant among variety x location-interactions, thus indicating the stable response for earliness at all locations of each variety. Grain filling periods of each variety showed the stable response at all locations like those of heading and maturing dates, however, there showed significance among locations for early group, and among varieties for late group. High correlations were between growth habit and winter survival for early varieties, and between shortday length and grain filling period for late one. Interior factors most closely related to heading date were growth habit and winter survival, and winter survival showed highly negative correlation with heading date. It needs to breed the early wheats adaptable for southern and/or northern areas separatively. The earlier heading and maturing dates of wheats were, the shorter internodes of culm are, appearing the outstanding phenomenon in early wheats. Heading date appeared negative correlations with test weight and with number of culm before winter, but showed positive correlation with number of kernels/spike.

• Journal of Korea Entertainment Industry Association
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• v.14 no.7
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• pp.581-587
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• 2020

The Many patients who have lumbar instability(LI) could make a different trunk movement pattern by reduction of their respiratory function and altered breathing pattern. This study was conducted to investigate the change in the thoracoabdominal usage rate(TAUR) on three circumference lines(axillary, xiphoid junction, 10th rib) during the resting and forced breathing (RB and FB) after respiratory pattern correction(RPC) exercises in patients with LI. 15 patients in the experimental group performed RPC exercises, and 15 patients in the control group conducted lumbar stabilization exercises. Before the intervention, both groups had a significant difference in the usage rate among the three thoracoabdominal lines during the RB and FB(p<.05). After the intervention, the experimental group was seen no significant difference in the usage rate among the three lines during the RB(p>.05) and exhibited significant differences in the usage rate between the two thoracoabdominal lines during the FB(p<.05). The RPC exercises might improve the trunk movement patterns by restoring the respiratory patterns. We suggest that the RPC can apply in the re-education and reinforcement process at the reha-program for LI patients.

• Journal of the Korean Society of Physical Medicine
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• v.7 no.1
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• pp.103-110
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• 2012

연구목적 : 본 연구는 노인의 성별이 낙상에 영향을 줄 수 있는 체중분포지수에 미치는 차이를 알아보고자 한다. 연구방법：광주광역시 소재 빛고을 노인건강타운 물리치료실을 이용하는 65세 이상 66명(남성 33명, 여성 33명) 노인을 대상으로 남성노인 평균연령은 70.97세, 여성노인 평균연령은 71.39세로 모든 대상자는 TETRAX의 체중분포지수(weight distribution index; WDI)를 이용하여 성별에 따라 그 차이를 비교 분석하였다. 측정 방법 은 안정된 발판에서 눈을 뜨고 정면을 향한 자세, 안정된 발판에서 눈을 감고 정면을 향한 자세, 불안정한 발판에서 눈을 뜨고 정면을 향한 자세, 불안정한 발판에서 눈을 감고 정면을 향한 자세, 안정된 발판에서 눈을 감고 고개를 오른쪽으로 돌린 자세, 안정된 발판에서 눈을 감고 고개를 왼쪽으로 돌린 자세, 안정된 발판에서 눈을 감고 고개를 뒤로 젖힌 자세, 안정된 발판에서 눈을 감고 고개를 숙인 자세로 측정하였고, 분석방법은 SPSS version 12.0을 이용하여 통계처리 하였고, 남녀 간의 안정성지수와 체중분포지수의 평균차이 검정은 독립표본 t-검정을 실시하였다. 통계학적 유의성을 검증하기 위해 ${\alpha}$는 유의수준 0.05로 하였다. 연구결과 : 성별에 따른 WDI비교에서 불안정한 발판과 안정된 발판에서 눈을 뜬 상태와 감은 상태에 정면을 향한 자세, 안정된 발판에서 눈을 감고 고개를 왼쪽과 오른쪽으로 돌린 자세에서 유의한 차이가 있었으나 안정된 발판에서 고개를 뒤로 젖힌 자세와 고개를 숙인자세에서는 유의한 차이는 없었다. 결론 : 본 연구의 결과를 바탕으로 성별에 따른 노인의 WDI에 영향을 미칠 수 있는 요인을 파악하여 낙상예방프로그램 기초자료로 활용 될 것으로 생각된다.

• Korean Journal of Applied Biomechanics
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• v.19 no.4
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• pp.689-696
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• 2009

This study was conducted to examine the effects of the lumbar stabilization exercise (LSE) on fall prevention in elderly females (n = 21) by measuring changes in the isometric strength, multifidus, transverse abdominis muscle thickness, and posture stability index. The strength of isometric contraction was measured by the 3-D Pegasus system ; the thickness of the multifidus and transverse abdominis were measured by using Sonoace 6000C, and the posture stability index was measured using a computerized Biodex Balance System SD apparatus analysis. These results lead us to the conclusion that flexion and extension, left rotation on strength of isometric contraction, and thickness of the transverse abdominis (when released) statically increased. Overall, the anterior/posterior and medial/lateral elements in the posture stability index statically decreased, Consequently, the LSE should the prevent falls in elderly females.

• Journal of the Korean Geotechnical Society
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• v.38 no.7
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• pp.39-47
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• 2022

This study aims at evaluating the stability of disaster risks, such as schools, apartments, and geotechnical structures located around slopes in urban areas. The research conducted an aerial photography analysis on where the slope of the retaining wall behind 𐩒𐩒 High School in Gwangju collapsed in August 2018 due to heavy rain. In general, the overflow of rainwater has been managed through drainage channels around slopes during the rainy season, and the surface flow of rainfall was limited due to the presence of dense forests in the area. However, when the slope collapsed, a lot of water flowed out of the ground, and the saturated surface layer ground was destroyed. To analyze the cause, the changed terrain of the upper slope area, which could not be directly identified, was photographed using unmanned aerial vehicles. Digital Elevation Model by unmanned aerial vehicle shooting was performed by analyzing the slope map, calculating the direction of rainfall and the length and width of water-logged areas. The change in the instability of the slope over time due to a 10-day rainfall was also analyzed through numerical analysis.

• Conservation Science in Museum
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• v.7
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• pp.43-51
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• 2006

From the low swamp remains in Sinchang-dong, Gwangju, a number of wooden lacquerware along with various wooden artifacts were excavated. These excavated lacquerware have deteriorated and weak wooden parts and the lacquer layer come off from the wooden parts; they are very likely to peel off and crack. Therefore, we impregnated the lacquerware in PEG#4000 40% solution that was effective for vacuum freeze drying and finished freeze-drying below 0°…. We compared the weight of wood and lacquerware right after the freeze-drying with the weight after leaving them in a airtight space with 60% RH (relative humidity). The comparison results showed no change in weight; thereby we confirmed controlling the finishing temperature during freeze-drying could control the moisture in wood after drying and it could stabilize wood against the change in moisture in the atmosphere. according to the analysis of the lacquer fragment, the base layer was pasted on the wooden surface with mixed black pigment and the upper layer was pasted three or four times with the mixture of lacquer and black pigment; or it was pasted without the black base coating.

• Journal of Korea Entertainment Industry Association
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• v.14 no.7
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• pp.469-476
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• 2020

This study was conducted on college students with low back pain to find out how a backrest exercise program affects the pain and balance of students. Thirty-two students at K University in Gwangju City were randomly classified with backrests and without backrests group respectively. Each group conducted the program for lasted three times a week for a total of 30 minutes for four weeks. Visual Analog Scale (VAS) was measured for pain assessment before and after arbitration, and the Korean Oswestry Disability Index (KODI) was measured for functional disability assessment. TETRAX is used to measure the weight distribution index and posture stability. According to the results of the experiment, the Visual Analog Scale (VAS) and the Korean Oswestry Disability Index (KODI) and weight distribution index showed significant differences over time, but the posture stability was no significant difference. The results of this study show that the lower limb exercise program is effective in back pain, dysfunction and weight distribution index, and it is believed that the pain reduction is significant when performed by distal movement in the area of back pain, It can be applied effectively to reduce low back pain in college students who spend a lot of time sitting down.

• Journal of Korea Port Economic Association
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• v.28 no.1
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• pp.143-157
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• 2012

By strengthening the market control and expanding the networks, providers of global logistics are expanding their service scope. The warehouses connect networks to internal and external warehouses by using logistics providers. The paper focuses on analyzing the efficiency of warehouses on each district. Therefore, the study classifies the factors which specify the efficiency of a total logistics of warehouse industry and warehouses' employees and the number of warehouses on district. Furthermore, the most recently published reports by National Center for Statistics in 2012 was used in order to guarantee credibility of the study. This study utilizes five years of materials, which are from 2005 to 2009. By applying SBM (Slack Based Measure), DEA Window model, and the Malmquist productivity model, the trend in efficiency and stableness were analyzed. The principal purpose of the paper is evaluating the efficiency. Also, analyzing its determinants and illustrating a long-term relationship between the regional warehouses and annual turnover of the warehouses were used as output measures. In addition, the number of warehouses of each region, employees, warehouses equipments, and the Logistics Warehouses Providers were used as input measurements. As a result, Malmquist productivity model and annual stableness has shown a continuous increasing. Ultimately, to be approved as product of Korea, a new stratiges that meet the standards and Rules of Origins by FTA should be developed. Therefore, there must be a development that takes regional characteristics into consideration.