• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2009년도 학술발표회 초록집
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• pp.1306-1310
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• 2009

The roughness coefficients were estimated by the Manning's equation for the measured stage and flow velocity of Bocheong stream basin in Kum river. The relationships between the estimated roughness coefficients and the geomorphologic factors were formulated by the linear, logarithmic, exponential and power type function, thereafter correlation equations were presented. The correlation analysis was performed between the measured stream length and the basin area of Bocheong stream basin by the linear, logarithmic, exponential and power type function, and correlation equation for the stream length was given. The roughness coefficient has strong correlationship with stream slope, but low correlation coefficients with stream length and basin area. For the correlationship with the roughness coefficients and the stream slope, the logarithmic type function has the smallest correlation coefficient, on the other hand, the exponential type function has the largest correlation coefficient. For the relationship between the stream length and the basin area, the correlation coefficient of the logarithmic type function shows the smallest value, linear type function shows the largest value.

• 한국의류학회지
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• 제18권5호
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• pp.602-614
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• 1994

The purpose of this study was to suggest the proper ease of total crotch length concerning both appearance and comfort. The research processes as follows. 1) For the purpose of obtaining the necessary ease of slacks in body movement, experimental slacks of no ease of total crotch length were made. Three college girls putting on these experimental slacks were examined on their back middle waist lines using cross-cut method. 2) Experimental slacks for suggesting the proper ease consist of 7 types; slacks CO, Wl, W3, W5, W7, C3, C5. The sensory evaluation for appearance and comfort was applied to evaluate the 7 slacks. The results can be summarized as follows. 1. As the leg-movement angle increased, the vertical space increased and the horizontal space decreased. There was negative relationship between vertical and horizontal space. And as the leg.movement angle increased, the area of space increased. The shapes of space showed the amounts of space and the direction of force by the movements. 2. The appearances of slacks C3, W3, C5 were better than the other slacks. The eases of the crotch were better than those of the waist line in appearance. And slakcs W7 was better than any other , ;lacks in comfort. When the amount of each part of eases was same, the comfort in eases of crotch was not as good as that of waist line. 3. In slacks, the proper ease of total crotch length was 3% and 5% of total crotch length.

• 한국정보과학회논문지:정보통신
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• 제28권4호
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• pp.657-664
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• 2001

선행 논문(제1부)[13]에서는 광 베니언-형 교환 망에 있어 누화를 야기하는 멀티캐스트 접속들간의 관계를 그래프로 표현하고, 해당 그래프의 차수의 상한을 제시하였다. 본 논문(제2부)에서는 교환소자를 달리하는 멀티캐스팅의 스케줄링에서의 라우팅 횟수 즉, 스케줄링 길이에 대해 다룬다. 최적의 스케줄링 길이를 구하는 문제는 NP-complete이므로 최적 길이의 상한의 두 배 이내의 길이를 제공하는 근사 알고리즘을 제시한다. 아울러, 링크를 달리하는(즉, 넌블럭킹) 멀티캐스팅에 관한 스케줄링 길이를 고찰한다. 얻어진 스케줄링 길이 하에서 다양한 넌블럭킹 베니언-형 멀티캐스팅 망들을 규명한다.

• 한국항해항만학회지
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• 제32권9호
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• pp.723-727
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• 2008

Sensing performances of evanescent field absorption (EFA) hetero-core fiber sensor has been presented based on EFA by changing the length and the core diameter of the single mode fiber. Experimental results have demonstrated a good feature in their relationship between the length and the core diameter of the single mode fiber. The sensor consists of 2 fiber optics which have the same cladding diameter of $125{\mu}m$ However one fiber optic used is single mode and has varying core diameter ranging from 3.3 to $5.6{\mu}m$. The other fiber is multimode type and has a thicker fixed core diameter of $62.5{\mu}m$. The 2 fiber optics are thermally spliced together. Experiments conducted to measure the resonance wavelength were carried out over a range of refractive index, to find the optimum sensing length Experiments show that core diameter of the single mode fiber and sensing length offects the linearity and sensitivity.

• 산업기술연구
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• 제30권B호
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• pp.17-23
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• 2010

Since the propagation of a short fatigue crack is directly related to the large crack which causes the fracture of bulk specimen, the detailed study on the propagation of the short crack is essential to prevent the fatigue fracture. However, a number of recent studies have demonstrated that the short crack can grow at a low applied stress level which are predicted from the threshold condition of large crack. In present study, the threshold condition for the propagation of short fatigue crack is examined with respect to the micro-structure and cyclic loading history. Specimens employed in this study were decarburized eutectoid steels which have various decarburized ferrite volume fraction. Rotating bending fatigue test was carried out on these specimens with the special emphasis on the "critical non-propagating crack length" It is found that the reduction of the endurance limit of their particular micro-structures can be due to the increase of the length of critical non-propagating crack, and the quantitative relationship between the threshold stress ${\sigma}_{wo}$ and the critical non-propagating crack length $L_c$ can be written as ${\sigma}_{wo}{^m}{\cdot}L_c=C$ where m,C is constant. Further experiments were carried out on cyclic loading history on the length of critical non-propagating crack. It shown that the length of critical non-propagating crack is closely related to cyclic loading history.

• 한국작물학회지
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• 제28권1호
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• pp.94-99
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• 1983

'81년 태풍 Agnes호에 의해 피해를 받았던 전북지방의 수도 품종들을 대상으로 도복의 원인을 벼의 절간을 대상으로 형태 및 생리적으로 조사분석 하였던 바 그 결과는 다음과 같다. 1. 도복 피해는 서광벼, 한강찰벼, 낙동벼가 심하였고 단간종인 밀양 30호는 경미하였다. 2. 절간장이 길고 단위절간중이 가볍고 간태와 간벽이 가늘수록 도복에 대한 저항성을 약화 시켰음을 명백히 알 수 있었다. 3. 도복된 포장의 벼는 정상답의 벼보다 촤절중이 갑벼고 절간장, 단위절간중과 촤절중과는 유의적인 상관관계가 있었다. 4. 절간에 전질소함량이 낮고 인산, 규산, Cellulose, 전분함량이 많을수록 도복에 대한 저항성을 높였다. 5. 도복에 저항력이 약한 품종은 간장과 단위절간중이 도복답과 정상답과의 차가 크고 저항력이 강한 품종은 그 차가 적었다.

• 한국작물학회지
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• 제28권1호
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• pp.100-106
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• 1983

이 연구에서는 벼 생육기 침수에서 피해가 가장 뚜렷이 나타나는 주요생육형질의 품종간 차이와 벼의 생식생장기 침수에서 피해를 크게 좌우하는 임실장해의 정도가 가장 예민하게 나타나는 시점을 찾기 위하여 벼의 포기단위, 이삭단위, 그리고 영화단위로 청수와 탁수로 처리하여 얻어진 결과를 요약하면 다음과 같다. 1. 침수일수의 증가에 따라 엽초의 이상신장량이 많아졌고, 침수후의 초장신장량 및 분벽수는 감소되었으며 출수지연일수가 길어졌다. 2. 일/인형 품종은 일본형 품종에 비하여 엽초의 이상신장량이 적고 침수후 초장 신장의 억제 및 분벽력의 감소가 적었다. 3. 침수에 의한 임실장해가 가장 심한 시기는 청수와 탁수 모두 출수기이었으며 특히 출수전의 수잉기말에서 출수후 개화하기 전이었다.

• 대한물리치료과학회지
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• 제18권3호
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• pp.33-39
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• 2011

Background : The purpose of this study was to apply cervical orthosis for temporal parameters of gait was to evaluate the effect. Methods : Seven normal adults participated in this study. Before and after applying a cervical orthosis compared to gait. Outcome measure were: general characteristics, temporal parameters of gait. General chacteristics included age, gender, height, weight. Temporal parameters included the Velocity cycle, Stride length, Step length, Cadence cycle, Initial double support time. Temporal parameters of gait, using the motion analysis system for cervical orthosis were evaluated before and after applying. The data was analyzed using SPSS 12.0 software and the Wilcoxon's signed-ranks test. Results : Velocity cycle and Step length were no significant differences(p>0.05). But Stride length, Cadence cycle, Initial double support time were significant(p<0.05). After apply Cervical orthosis in gait, Stride length and Initial double support time was decreased and Cadence cycle was increased. Conclusion : Changes in temporal of temporal parameters of gait was apply a cervical orthosis with the limitations of vision due to take effect. Therefore, Cervical orthosis does not interfere with the normal gait pattern by limiting the Range of Motion so that we consider to apply.

• 한국식품과학회지
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• 제33권1호
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• pp.50-54
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• 2001

8품종 변이체 쌀 전분의 청가에 의한 아밀로오스 함량의 차이는 남풍벼>화청벼>분질미>남풍 CB243>화청 du-1>남풍 EM90>화청찰벼>shr.의 순이었다. 아밀로펙틴의 미세구조는 효소처리에 의해서 debranching시킨 전분의 glucose chain length분포 비교에 의해서 수행되었고, 품종별로 미세구조상에 차이가 있었다. 아밀로오스 함량이 낮을수록 씹힘성이 좋은 쌀빵의 제조가 가능하였으며, 아밀로펙틴 분획에 짧은 쇄장을 많이 함유하는 품종일수록 질감 및 기호도가 높은 쌀빵의 제조가 가능하였다.

• 산업공학
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• 제13권2호
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• pp.147-156
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• 2000

It is known that the human stature and its related dimensions generally increase until the late teens or early twenties, remain relatively constant throughout early adulthood, and decline from early-to-middle adulthood into old age. However, there is exception that the length of the human ears, which continue to grow throughout life. In this study, 600 Korean male and female subjects aging from 17 to 89 were selected. Four different points of external ears including Pinna length, ear connection point length, Concha length, and Lobule thickness were measured along with other relative subjects' demographic data(e.g., age, stature, weight) to determine the relationship among these obtained data. The results showed that the age, sex, and different ethnic populations were functions of ear dimensions similar to the human stature. For example, the Pinna length increases as the age increases(r= 0.689, p<0.00l). The primary objective of this study was thus to provide anthropometric dimensions of Korean ear for the product designers and recommend the appropriate product design solutions in relation to human ear. Based on the results of this study, it is suggested that the continuing growth of the human body parts should be considered in the application of anthropometric data to the design of the things especially for human use.