• 한국산업융합학회 논문집
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• 제23권2_2호
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• pp.245-254
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• 2020

This study investigated the so far little-researched characteristics of the behaviors of rock slopes at the time of an earthquake. For the selection of the rock block, a proper model was formed by applying the similarity in consideration of the roughness and strength of the rock slope(10m) on the site, and shaking table tests were carried out according to seismic excitement acceleration, and seismic waves. In the case of the inclination angle of the joint plane of 20°, the long period wave at 0.3g or more at the time of the seismic excitement surpassed the length of 100mm, the permissible displacement (0.01H, H:slope height), which brought about the collapse of the rock; the short period wave surpassed the permissible displacement at 0.1g, which caused the collapse of the slope. The rock slope was close to a rigid block and a structure more vulnerable to the long period wave than to the short period wave. It collapsed in the short period wave even at the seismic amplitude smaller than the maximum design acceleration in Korea.

• 대한한방내과학회지
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• 제37권6호
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• pp.1051-1058
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• 2016

Objectives: This case study reports on a case of rhabdomyolysis that occurred after spinning exercise. Methods: A patient diagnosed with rhabdomyolysis received Korean medical treatment and Western medical treatment for 6 days. We observed the patient for 13 days. Clinical symptoms were evaluated with the Numerical Rating Scale (NRS) and laboratory tests that included Liver Function Test, Renal Function Test, creatinine phosphokinase (CPK), myoglobin, and urine. Results: The clinical symptoms improved after treatment. In this case, acute renal failure has not occurred. The Laboratory results, including AST, ALT, CPK, and LDH, improved. Conclusions: Rhabdomyolysis can be treated with Korean medical and Western medical cooperative treatment.

• Archives of Plastic Surgery
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• 제38권5호
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• pp.663-668
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• 2011

Purpose: A modified free thenar flap was designed for coverage of volar finger defect with constant innervation using the palmar cutaneous branch of the median nerve. After clinical application of this flap, sensory results were evaluated in 6 cases. Methods: Patients were selected who have volar soft tissue defect with or without fingertip defect. The six cases of the innervated free thenar flap were performed since September 2009, and sensory outcomes were evaluated by the Semmes-Weinstein monofilament and two-point discriminator at four and half month after the surgery. Results: The Semmes-Weinstein Monofilament test revealed 3 cases showed 2.83, 1 case showed 3.61, 1 case showed 4.31 and 1 case showed 4.56. The static two-point discrimination test revealed 1 case showed 4 mm, 1 case showed 6 mm, 2 cases showed 9 mm, and 2 cases showed over 15 mm. The moving two-point discrimination test revealed 1 case showed 3 mm, 1 case showed 4 mm, 1 case showed 5 mm, 1 case showed 7 mm, and 2 cases showed over 15 mm. The donor sites showed no significant limitation of the thumb and neuroma formation. Conclusion: The innervated free thenar flap showed good sensory outcomes as a sensate free flap in a short time after surgery. It can be an option for coverage of volar finger defects that requires sensation.

• 한국도로학회논문집
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• 제16권3호
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• pp.51-57
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• 2014

PURPOSES : This study is to suggest tunnel length to spray curing compound, based on the field tests. METHODS : At first field test, length from the entrance of tunnel to wet wall was checked by visual survey. The second and third test, various sensors were installed in concrete or in tunnel, such as RH sensor, temperature sensor, portable weather station and etc.. And also, test for bleeding and retaining water of concrete were conducted to evaluate environmental effect on concrete pavement. RESULTS : The result of the field experiment for tunnel length to spray curing compound indicates that length changes depending on tunnel length, season, and location. Environmental condition of a short tunnel was not much different between location near entrance and at center of tunnel. However, in case of a medium and long tunnel, effect of outside environmental condition decreased, when location moved into tunnel center of it. CONCLUSIONS : From the testing results, it can be proposed that optimum tunnel length to spray curing compound is 60m for a medium and long tunnel, and whole length for a short tunnel.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 가을 학술발표회 논문집
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• pp.305-306
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• 2003

In the case of the geosynthetics usage to soil structure, there are some damages by compaction. And these damages by the installation compaction result in the unexpected changes of short and long term properties of the structure. So in the case of index test, there are some problems to the exact evaluation on the installation damage. Therefore, to the more definite evaluation on the installation damage of geosynthetics, the real site installation damage test is encouraged. (omitted)

• 항공우주시스템공학회지
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• 제4권2호
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• pp.21-25
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• 2010

Fatigue properties of composite materials are extremely important to design durable and reliable helicopter rotor blades. However, it is very difficult to apply conventional fatigue test loads in short period. Therefore, accelerating test speed and facilitating spectrum load realization are required. In this study, we have developed a fatigue testing method that uses a resonance of simply supported beam type blade specimen. This test consists in exciting the blade specimen with a frequency that corresponds to its natural frequency. In that case, the test specimen similar to a beam fixed between two pivot points starts vibrating and is significantly deformed. Resonant fatigue tests were performed by changing exciting vertical amplitude and frequency, and S-N curves of each composite materials were successfully obtained.

• 항공우주기술
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• 제9권2호
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• pp.1-7
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• 2010

Fatigue properties of composite materials are extremely important to design durable and reliable helicopter rotor blades. However, it is very difficult to apply conventional fatigue test loads in short period. Therefore, accelerating test speed and facilitating spectrum load realization are required. In this study, we have developed a fatigue testing method that uses a resonance of simply supported beam type blade specimen. This test consists in exciting the blade specimen with a frequency that corresponds to its natural frequency. In that case, the test specimen similar to a beam fixed between two pivot points starts vibrating and is significantly deformed. Resonant fatigue tests were performed by changing exciting vertical amplitude and frequency, and S-N curves of each composite materials were successfully obtained.

• 가정과삶의질연구
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• 제11권1호
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• pp.107-118
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• 1993

A dimension of well-being economic security was analyzed and compared with economic adequacy. Again it was tested whether two indicators of economic security(short-term vs. long-term) yield same distribution across all household groups. Economic Security was defined as the household ability to sustain a given level of consumption in the case of economic emergency; specifically loss of income. Measure of 8 different kinds of economic security were constructed from household net worth including and excluding home equity. Data were taken from the 1988 U.S. Consumer Expenditure Survey and 2148 households were selected to test hypotheses concerning the economic security of American households Empirical results showed a very low level of economic security in general. The first hypothesis that distribution of economic adequacy and economic security are same across all population groups was rejected. On the average security measure rather than adequacy measure was favor to white female-headed households and households who have old and highly educated house-holder. The second hypothesis that the indicators of long-term and short-term economic security yield the same results across all household was not rejected. In general the level of economic security was relatively higher when long-term indicator was used than short-term indicator was however the direction and relative size of effect of income and each control variable was almost same.

• 한국콘텐츠학회논문지
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• 제11권11호
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• pp.286-295
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• 2011

본 연구는 전반적인 발달지연, 감각 예민성, 촉각 방어와 작업수행의 문제를 가진 골덴하르 증후군 아동에게 감각통합치료를 적용하여, 골덴하르 증후군 아동의 감각통합 치료적 중재 개입방향을 제시하고자 하였다. 본 증례 아동은 만 7세 10개월 남아로 학교와 일상생활에서, 놀이와 학습에 대한 어려움, 운동발달 지연을 주 호소로 하여 검사가 의뢰되었다. 감각통합치료를 위한 평가로 캐나다 작업수행 측정(Canadian Occupational Performance Measure)시 바른 자세로 한글 읽고 쓰기가 첫째 작업수행 목표로 나타났고, 단축 감각프로파일(Short Sensory Profile) 과 감각 인터뷰에서는 감각 예민성과 촉각 처리영역에서 확연한 차이로 감각통합치료 중재가 요구되었다. 발달 프로파일 -3(Developmental Profile -3)은 5개 발달영역에서 전반적인 발달 지연이 나타났고, 운동 숙련도 검사 (Bruininks-Oseretsky Test of Motor Proficiency-2)에서 운동발달 수준이 평균 이하로 나타났다. 본 증례 아동에 대한 감각통합 치료를 통해 전반적인 발달, 감각예민성, 촉각방어와 같은 감각조절 기능이 향상되고, 작업수행이 개선되는데 도움이 되었다. 본 사례연구를 통해서 국내 골덴하르 증후군 아동의 감각통합치료 접근법에 기초 자료가 될 것이라고 사료된다.

• 한국산학기술학회논문지
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• 제11권4호
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• pp.1325-1332
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• 2010

미세증가감수지수 검사는 감각신경성난청의 세부 병변을 감별하기 위하여 사용되는 누가현상을 판별하는 검사이다. 본 논문은 PC 기반 소프트웨어로 구현한 미세증가감수지수 검사 소프트웨어를 기술한다. 구현된 소프트웨어는 검사자의 검사 참여 유 무에 따라 수동 검사와 자동 검사의 두 가지 모드를 제공함으로써 경제적인 검사가 진행 될 수 있게 한다. 또 필요할 경우에 자동으로 차폐를 수행한다. 그리고 1dB의 순간 상승음에 대한 검사뿐만 아니라 2dB와 5dB 상승음에 대한 검사도 지원함으로써 보다 정확한 검사 결과를 얻을 수 있도록 한다.