• Nuclear Engineering and Technology
• /
• 제47권5호
• /
• pp.513-522
• /
• 2015

The present paper aims at improving the modeling of turbulence for the upward turbulent bubbly flow through the use of experimental databases that contain data on small and large vertical ducts. First, the role of bubble-induced turbulence was analyzed, which indicated the dominant role of the bubble-induced turbulence in the duct center for relatively high void fraction cases. Therefore, the turbulence therein was mainly focused on, which indicated that the stronger turbulence could be induced by bubbles in large ducts with similar void fractions as compared to that in small ducts. Next, the turbulence of upward turbulent bubbly flow near the wall is discussed to understand the interaction between the wall-induced and bubble-induced turbulence. It showed that the existence of a wall could suppress the bubble-induced turbulence given the same void fraction, and the existence of bubbles could also suppress the solely wall-induced turbulence as compared to the single-phase turbulent flow, even though the total turbulence is enhanced. The above characteristics indicated that the current turbulence modeling method needs to be modified, especially when the bubble-induced turbulence plays a dominant role.

• 대한한의진단학회지
• /
• 제16권1호
• /
• pp.1-8
• /
• 2012

Objectives Although the faith that pulse diagnosis via a thread, namely "Xuanxizhenmai", had been applied to some women in royal families, is widely spread in East Asian countries, but it is still controversial that whether this faith is based on historical facts or just originated from some folk tales. So we provided some reasonable clues to interpret that faith. Methods The digitalized Annals of Joseon Dynasty and Twenty Five Books of Chinese History were used for historical example search. Conventional internet search engines are widely used for investigation of other examples and related interpretations. Additionally, a pilot observation with nylon threads and optical vibration detection devices was performed to confirm it's feasibility. Results Although there are a few evidences supporting Xuanxizhenmai's existence in Qing dynasty, no evidence was found to show it's existence in authoritative annals of Korea and China. The pilot observation showed that in optimal environment, some intense arterial pulse could be propagated dozens of centimeter, but it was not applicable to clinical needs. Conclusions Pulse propagation via a thread was proved to be reproducible within limited extents, but pulse diagnosis via a thread, namely Xuanxizhenmai, seem to have never been used for proper clinical purpose.

• 한국융합학회논문지
• /
• 제11권11호
• /
• pp.425-431
• /
• 2020

본 연구는 대학생을 위한 의미요법 자서전쓰기 프로그램의 타당성을 융합적으로 평가하기 위해 시행되었다. 프로그램은 Frankl의 의미요법과 우울한 중년 여성들을 위한 의미요법 자서전쓰기 프로그램을 기본으로 하여 개발되었다. 개발된 프로그램을 세 명의 정신건강간호사가 양적인 내용타당성 검사를 실시하였고 피드백 받은 내용을 수정하여 최종 90분짜리 6회기 프로그램을 확정하였다. 프로그램에 참여한 대학생 11명을 대상으로 포커스 집단 면접을 하여 참여 후 느낀 점을 자유롭게 말하도록 한 뒤 질적 자료를 내용분석하여 프로그램의 타당성을 질적으로 평가하였다. 질적 자료를 회기별로 내용분석한 결과 총 9개의 주제와 20개의 하위주제가 도출되었다. 주제명은 존재의 발견, 존재의 유일성, 나의 미래를 생각함, 참만남 경험, 나의 유일성, 성공적 대처경험, 태도 선택의 자유 인식, 자기초월의 필요성, 나의 존재 발견이었다. 주제명은 모두 각 회기의 목적과 일치하는 것으로 평가되었다. 추후 실험연구를 통해 의미요법 자서전 쓰기가 대학생의 정신건강에 어떤 영향을 미치는지 효과를 확인할 필요가 있다.

• The Journal of Asian Finance, Economics and Business
• /
• 제7권10호
• /
• pp.981-988
• /
• 2020

Seeing the existence of MSME needs that have still not been met although this sector is undeniably important in Indonesian economy, changes in community behaviour and the intensity of the use of technology in the community, financial technology (fintech) has a lot of potentials to become a part of the solution of the problem commonly faced by MSMEs. Therefore this research needs to be done to observe the potential of fintech in integrating MSMEs in terms of the application of technology and knowledge from the community related to fintech. By using Technology Acceptance Model, this research tries to understand the determinant factors of the fintech application used by MSME. Based on the research framework and model, path analysis method used in this research. This research uses primary data gathered by the questioner, which was distributed to MSME. From the analysis conducted, we can conclude that the external factors tested in this research could have an effect on the behaviour intention through perceived usefulness in MSME practice of financial technology. Large variation in MSME educational background, busineess age and size would become a challenge in promoting fintech application, therefore this finding suggests that fintech should be promoted by highlighting what benefits can be obtained by using fintech application.

• Journal of Korean Biological Nursing Science
• /
• 제18권3호
• /
• pp.144-152
• /
• 2016

Purpose: This study compares beneficiaries of Korean Medicaid with those under the National Health Insurance program, seeking to understand how each group utilizes their healthcare. Methods: Data were obtained from a Health Promotion Survey in 2005. Health status was measured by the respondents' perception of health. Health service utilization included the availability of healthcare services, the type of healthcare institution, and intent to revisit. Predisposing and enabling factors, as well as health care needs were used for this study. Results: Compared to National Health Insurance beneficiaries, Medicaid beneficiaries reported lower levels of health status and fewer enabling factors. They had more chronic diseases and disabilities. Education level, existence of chronic diseases, exercise patterns, and disabilities were associated with health status. Conclusion: We found that Medicaid beneficiaries had fewer resources and higher levels of health needs. As Medicaid is reformed, policy makers and administrators should understand healthcare utilization behaviors of Medicaid beneficiaries and the factors hindering access to care.

• 대한한의학회지
• /
• 제28권3호통권71호
• /
• pp.70-85
• /
• 2007

Objectives : Considering the indigenousness of Korean medicine, the historical record was first introduced in 1946 as follows; a Chinese person, Ji-chong (知聰), brought 164 volumes of medical books to Japan via Goguryeo (高句麗) in A.D. 562. Since this event happened, Korean Oriental Medicine has been derived from Traditional Chinese Medicine because ancient Korean Medicine originated and was developed in China. The purpose of this study was to investigate the existence and role of Ji-chong in the history of medical exchanges between ancient Korea and Japan. Methods : We studied Ji-chong through ancient and modern historical literatures such as Nihon Shoki (日本書紀), the record of $Shinsen-sh{\bar{o}}jiroku$ (新撰姓氏錄), Korean Medical History (韓國醫學史), Japanese Medical History (日本醫學史), Samguk Sagi (三國史記), etc. Results : We found indications of the existence of Ji-chong and the import of Chinese medical literature to the ancient Korean peninsula by examining domestic and foreign historical literature. Especially, he was closely related to historical assumptions about the Japanese conquest of Goguryeo in A.D. 562, although without objective historical evidence and described only in modern Japanese historical records and Korean Medical History. However, substantial medical exchange toward Japan was accomplished by Korean medicine of either Goguryeo, Baekje (百濟), or Silla (新羅) dynasty until the late A.D. 6 century. Conclusions : Based on the above investigation, the idea that Ji-chong carried medical literature via Goguryeo in A.D. 562 needs to be reconsidered and the role of Ji-chong as recorded in a variety of literature and databases should be amended., Korean Oriental Medicine has been derived from Traditional Chinese Medicine because ancient Korean Medicine originated and was developed in China. The purpose of this study was to investigate the existence and role of Ji-chong in the history of medical exchanges between ancient Korea and Japan. Methods : We studied Ji-chong through ancient and modern historical literatures such as Nihon Shoki (日本書紀), the record of Shinsen-$sh{\bar{o}}jiroku$ (新撰姓氏錄), Korean Medical History (韓國醫學史), Japanese Medical History (日本醫學士), Samguk Sagi (三國史記), etc. Results : We found indications of the existence of Ji-chong and the import of Chinese medical literature to the ancient Korean peninsula by examining domestic and foreign historical literature. Especially, he was closely related to historical assumptions about the Japanese conquest of Goguryeo in A.D. 562, although without objective historical evidence and described only in modern Japanese historical records and Korean Medical History. However, substantial medical exchange toward Japan was accomplished by Korean medicine of either Goguryeo, Baekje (百濟), or Silla (新羅) dynasty until the late A.D. 6 century. Conclusions : Based on the above investigation, the idea that Ji-chong carried medical literature via Goguryeo in A.D. 562 needs to be reconsidered and the role of Ji-chong as recorded in a variety of literature and databases should be amended.

• 한국콘텐츠학회논문지
• /
• 제16권7호
• /
• pp.750-759
• /
• 2016

이 연구는 노동시간이 노동자의 삶 만족도에 미치는 영향을 실증적으로 규명함으로써, 한국 장시간 노동체제가 가지는 의미의 일단을 규명하고자 한 것이다. 이 연구의 분석자료는 통계청의 2014년 생활시간조사자료이며, 노동시간 요인은 '하루 노동시간 길이'와 '주당 휴일 수준' 두가지이다. 먼저 노동시간이 삶 만족도에 미치는 영향을 검증하고, 이어서 돌봄을 필요로 하는 가족원이 있는지 여부에 따라 노동시간이 삶 만족도에 미치는 영향이 달라지는지 여부를 살펴보았다. 분석 결과, 통상 행복 수준에 영향을 미치는 소득, 교육, 고용형태, 성별 등의 요인들을 통제하는 경우에도 노동시간 길이가 길수록, 휴가 수준이 낮을수록 한국인의 삶 만족도는 저하된다. 그러나 돌봄을 요하는 가족원이 있는 경우 노동시간이 삶 만족도에 미치는 영향은 달라진다. 돌봄을 필요로 하는 가족원이 있는 경우, 노동시간 길이와 휴가 수준은 삶 만족도에 더 이상 유의미한 영향을 미치지 않으며, 성별이 삶 만족도에 미치는 영향력의 유의미성 역시 사라진다. 이는 돌봄을 요하는 가족원이 없는 경우에, 노동시간이 미치는 영향 및 여성이 남성보다 삶 만족도가 높은 것과 대조된다. 이는 한국 가족의 돌봄시간 성별 격차와 깊이 관련되어 있는 것으로 추정된다.

• 보건행정학회지
• /
• 제28권4호
• /
• pp.339-351
• /
• 2018

Background: The purpose of this study is to estimate empirically whether there is a difference in medical use among income groups, and if so, how much. This study applies econometric model to the most recent year of Korean Medical Panel, 2015. The model consists of outpatient service and inpatient service models. Methods: The probit model is applied to the model which indicate whether or not the medical care has been used. Two step estimation method using maximum likelihood estimation is applied to the models of outpatient visits, hospital days, and outpatient and inpatient out-of-pocket cost models, with disconnected selection problems. Results: The results show that there was the inequality favorable to the low income group in medical care use. However, after controlling basic medical needs, there were no inequities among income groups in the outpatient visit model and the model of probability of inpatient service use. However, there were inequities favorable to the upper income groups in the models of probability of outpatient service use and outpatient out-of-pocket cost and the models of the number of length of stay and inpatient out-of-pocket cost. In particular, it shows clearly how the difference in outpatient service and inpatient service utilizations by income groups when basic medical needs are controlled. Conclusion: This means that the income contributes significantly to the degree of inequality in outpatient and inpatient care services. Therefore, the existence of medical care use difference under the same medical needs among income groups is a problem in terms of equity of medical care use, so great efforts should be made to establish policies to improve equity among income groups.

• 전자공학회논문지D
• /
• 제36D2호
• /
• pp.1-10
• /
• 1999

FET 소신호 모델의 직접추출법은 기생소자값을 구하기 위해 주로 순방향 소동(cold) FET 조건을 이용하고 있다. 본 논문은 수동 FET 조건에서 해석적 채널모델을 유도하고, 정상수동 소자 조건에서도 순방향 수동 FET 조건과 동일 한 정보를 얻을 수 이Tdmadmff 보인다. 이와 함께 수동 FET 조건에 의해 제한되는 능동 FET 소신호 모델의 오차를 추적하여 수동 FET 방법을 이용한 직접 추출 모델의 오차 한계를 살피고, 오차 최소점의 유무를 통해 수동 FET 기생저항값의 유효성을 검토한다.

• 조명전기설비학회논문지
• /
• 제25권2호
• /
• pp.103-112
• /
• 2011

This paper proposes a new fuzzy speed controller for the precise speed control of a permanent magnet synchronous motor(PMSM). The proposed control system needs the information of the angular acceleration instead of the load torque, so the third-order fuzzy acceleration observer estimates it. Moreover, the LMI conditions are derived for the existence of the fuzzy acceleration observer and fuzzy speed controller, and the gain matrices of the observer and controller are obtained. It is analytically proven that the proposed observer-based fuzzy speed regulator is exponentially stable. To evaluate the performance of the proposed control algorithm, experimental results as well as simulation results are provided under the conditions of motor parameter and load torque variations. Finally, it is clearly confirmed that the proposed control method can accurately control the speed of a PMSM.