• 한국유체기계학회 논문집
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• 제20권1호
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• pp.74-80
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• 2017

Pump sump system or pumping stations are built to draw water from a source such as river and used for irrigation, thermal power plants etc. If pump sump is improperly shaped or sized, air entraining vortices or submerged vortices may develop. This may greatly affect pump operation if vortices grow to an appreciable extent. Moreover, the noise and vibration of the pump can be increased by the remaining of vortices in the pump flow passage. Therefore, the vortices in the pump flow passage have to be reduced for a good performance of pump sump station. In this study, the effect of pump intake leaning angle and flow rate on the pump sump internal flow has been investigated. There are three cases with different leaning angle. Moreover, a pipe type with elbow also has been studied. The flow rate with three classes of air entraining vortices has been examined and investigated by decreasing the water level. The result shows that the air entraining vortices easily occurs at the pump intake with large leaning angle. Moreover, the elbow type of the pump intake easily occurs air entraining vortices at the high flow rate (or velocity) in comparison to other pump intake type.

• 한국병원경영학회지
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• 제26권1호
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• pp.55-70
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• 2021

Purpose: The purpose of this study was to examine the influencing factors of the patient leaning phenomenon in tertiary hospitals. Based on the results of this study, we intended to find implications for improving the problems of the delivery system imbalance in tertiary hospitals caused by patient leaning phenomenon. Methodology/Approach: Qualitative studies were conducted, using focus group interviews and in-depth interviews. The focus group interviews were conducted for 12 users of tertiary hospitals by 2 groups. And in-depth interviews were conducted for 6 tertiary hospital managers. This was considered to be the most effective approach to gather diverse and in-depth information about the influencing factor of patient leaning phenomenon in tertiary hospitals. Findings: In focus group interviews, the reason for choosing tertiary hospitals was the reliability of the hospital(physician, reputation, etc.). And the effect of the policy to strengthen coverage of National Health Insurance and private medical insurance was relatively small. In other words, we found that the individual's desire to receive medical services suitable for one's health status and disease condition was the biggest factor, rather than the cost and policy factors. Practical Implications: We suggested that the appropriate medical care provision should be strengthened according to the role and function of medical institutions. In addition, the education system needs to be reorganized to activate the referral program, expand community medical capabilities, and foster quality primary medical care.

• 한국지능시스템학회논문지
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• 제7권4호
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• pp.40-47
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• 1997

이 논문에서는 직선 허프변환을 이용하여 유전밴드 영상의 위치를 인신한 다음, 영상의 기울어짐을 검출하고 보정하는 방법을 연구하였다. 먼저 스캐너로 입력된 그레이스 스케일 유전밴드 영상을 이진화한 후 직선 허프변환에 위하여 유전밴드 영상에 포함되어 있는 직선성분을 추출하고, 직선성분들이 직교하는 점을 찾아내어 입력하고자 하는 영상의 위치를 인식한다. 그리고 스캐너를 통하여 많은 양의 유전밴드를 영상 데이터를 효과적으로 입력할 수 있도록, 위치인식 과정에서 실시한 직선 허프변환에 의해 영상의 기울어짐을 $1도 이내의 정확도로 검출하고, 기울어짐을 자동으로 보정한다.

• 한국운동역학회지
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• 제17권2호
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• pp.207-216
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• 2007

The purpose of this study was to biomechanical analysis Judo's Kuzushi throwing motion in order to increase the effectiveness of Nage-waja(throwing technique). The Tori was a Judo player with 18 years experience(4th degree) while the Uke was a player with 2 years experience(1st degree). The kinematic data was captured using the Vicon motion system (7 cameras) and the kinetics were recorded by force plates(2 AMTI). The following were the results; While leaning to the front the subject's trunk's angle was $14.5^{\circ}$, the lower limbs angle was $23.8^{\circ}$, knee angle was $179.6^{\circ}$ and the vertical reaction of the left leg was 325.42N(BW 0.34) and the right leg was 233.7N(BW 0.47). While leaning back the subject's trunk's angle was $11.3^{\circ}$, the lower limbs angle was $4.1^{\circ}$, knee angle was $1761^{\circ}$ and the vertical reaction of the left leg was 299.53N(BW 0.43) and the right leg was 441.7N(BW 0.64). While leaning to the left the subject's trunk's angle was $30.8^{\circ}$, the lower limbs angle was $2.7^{\circ}$, knee angle was $175.2^{\circ}$ and the vertical reaction of the left leg was 711N(BW 1.03) and the right leg was 9.2N(BW 0.01). While leaning to the right the subject's trunk's angle was $36.5^{\circ}$, the lower limbs angle was $10.4^{\circ}$, knee angle was $175.2^{\circ}$ and the vertical reaction of the left leg was 13.2N(BW 0.02) and the right leg was 694.7N(BW 1.01). While leaning to the left front corner the subject's trunk's angle was $19.8^{\circ}$ (front) and $15.1^{\circ}$ (left), the lower limbs angle was $17.8^{\circ}$ (front) and $2.4^{\circ}$ (left), knee angle was $177.8^{\circ}$ (front) and $173.9^{\circ}$(left), and the vertical reaction of the left leg was 547.4N(BW 0.8) and the right leg was 117.8N(BW 0.17). While leaning to the right front corner the subject's trunk's angle was $15.4^{\circ}$ (front) and $17.7^{\circ}$ (right), the lower limbs angle was $21.1^{\circ}$, (front) and $5.7^{\circ}$ (right), knee angle was $175.5^{\circ}$ (front) and $178.9^{\circ}$(right), and the vertical reaction of the left leg was 53N(BW 0.08) and the right leg was 622.4N(BW 09). While leaning to the left rear corner the subject's trunk's angle was $9.2^{\circ}$ (back) and $13.8^{\circ}$ (left), the lower limbs angle was $2^{\circ}$, (back) and $5.7^{\circ}$ (left), knee angle was $175.5^{\circ}$ (back) and $172.8^{\circ}$(left), and the vertical reaction of the left leg was 698.2N(BW 1.02) and the right leg was 49.6N(BW 0.07). While leaning to the right rear corner the subject's trunk's angle was $8.9^{\circ}$ (back) and $19.6^{\circ}$ (right), the lower limbs angle was ${0.6^{\circ}}_"$ (back) and $3.1^{\circ}$ (right), knee angle was $174.6^{\circ}$ (back) and $175.6^{\circ}$(right), and the vertical reaction of the left leg was 7.2N(BW 0.01) and the right leg was 749.4N(BW 1.09). It was observed that during the Judo motion Kuzushii the range of the COM varied from $26.5{\sim}39.9cm$. It was concluded that the upper body leaned further than the lower body as there was knee extension. There was high left leg reaction forces while leaning to the left and likewise for the right side. It was therefore deduced that the Kuzushi was a more effective throwing technique for the left side.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2010년도 춘계 종합학술대회 논문집
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• pp.459-462
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• 2010

E-Leaning 시스템에 필요한 LMS(Learning Management Systems)의 구축과 강의 제작은 일반 교육자들이 쉽게 접근할 수 없는 고급 기술 및 고비용을 필요로 한다. 따라서 일반 교육자들에게는 e-러닝 시스템의 이용이 용이하지 않은 실정이다. e-러닝 시장의 확대 및 교육 콘텐츠의 다양화를 위하여 일반 교육자들이 손쉽게 접근 및 이용이 가능한 오픈형 e-러닝 시스템의 구축 방법론을 개발하였다.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제5권1호
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• pp.57-69
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• 2001

A new initiative in the 7th curriculum of mathematics is the inclusion of spatial sense in geometry. The purpose of this study is threefold: a) to identify the concepts of spatial sense; b) to systematize the contents of spatial sense by analysis the curricular and texbooks; and c) to explore an effective way of teaching-leaning of spatial sense.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제5권1호
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• pp.13-20
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• 2001

Interaction through communication plays critical role in the mathematics learning in the sociocultural perspectives. The communication make the students construct shared knowledge, and also plays a role of mediation in making meaning. So, we have to consider sociocultural eprspectives in design of the mathematics leaning using computer. While Computer Assisted Instruction was the one-directional teaching program which proceed from computer to students, mathematics leaning using computer in the sociocultural perspectives have to consider two-directional instruction that proceed from computer to students as well as from students to computer. This interactional activity is the critical thing in the mathematics learning using computer.

• 복식
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• 제53권6호
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• pp.25-43
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• 2003

This study is to classify the types of Jikryung and to look into formative . periodic Characteristics. Results of analyzing can be described as follows. 1. Jikryung in the Chosun Era was classified according to whether it had a side hem. Jikryung which had side hem was reclassified according to the position of the side hem into inside, inside and outside and outside fold types and backward leaning type. Jikryung with no side hem was reclassified into types of closed and opened sides. 2. Concerning formative Characteristics, the type of inside fold was coexisted with the types of short front and long rear, the same front and rear, and narrow sleeves, bean chaff typed sleeves. Inside and outside fold type was used the type of short front and long rear, narrow sleeves. Outside fold type was used the type of same front and rear, bean chaff typed sleeves. Backward leaning type was used the same front and rear, wide sleeves. The types of closed and opened sides transformed from double Sup to single Sup and from narrow sleeves to bean chaff in its form and wide sleeves. 3. Concerning periodic Characteristics, the 1st period of Jikryung with side hem showed up the type of inside and outside fold, the 2nd period did the type of outside fold, The 3rd period did the type of backward leaning. Regarding Jikryung with no side hem, its 1st and 3rd periods saw the type of closed side, while its 2nd period coexisted with the types of closed and opened sides.

• 한국컴퓨터정보학회논문지
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• 제3권3호
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• pp.55-61
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• 1998

CAI(Computer Aided Instruction)에서 학습의 데이터가 되는 교재의 학습 순서는쉬운 항목에서 어려운 항목의 순번으로 나열되어 있다. 학습자는 반드시 이 순서대로 학습하는 것은 아니다. 실제는 항목간의 전후를 시행착오 하면서 학습을 하고 있다. 본 논문에서는 지적 CAI(Intelligent CAI : ICAI) 학습으로 항목에 대한 이해도를 퍼지성의 시행착오로학습시켜 구조화된 학습을 퍼지 추론에 의해 모델화 한다. 방법으로는 각 항목간의 순서관계에 의해 학습과 이해의 차이를 고려하여 퍼지 추론 규칙에 의해 학습의 모델을 정식화했다. 추론 규칙을 간략화 하여 CAL 시스템의 처리로 시행착오의 학습을 제안한다.

• Journal of Advanced Marine Engineering and Technology
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• 제39권8호
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• pp.849-855
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• 2015

A better flow condition for the intake of pump is provided by the sump pump that connects the forebay to the intake of the pump station. If the suction sump is improperly shaped or sized, air-entraining vortices or submerged vortices may develop. These phenomena may greatly affect pump operation if vortices become sufficiently large. Moreover, any remaining vortices in the pump flow passage may result in an increase in the noise and vibration of the pump. Therefore, the vortices in the pump flow passage must be reduced to achieve good pump sump station performance. In this study, the effect of suction pipe leaning angle on the pump sump's internal flow is investigated. Additionally, a pipe type with an elbow shape is investigated. The results show that the air entraining vortices occur under the condition of a water level ratio H/D = 1.31 for each suction pipe type.