• Journal of Power Electronics
• /
• 제4권1호
• /
• pp.1-11
• /
• 2004

A stable adaptive sensorless speed controller for three-level inverter fed induction motor direct torque control (DTC) system using the radial-basis function network (RBFN) is presented in this paper. Torque ripple in the DTC system for high power induction motor could be drastically reduced with the foregoing researches of switching voltage selection and torque ripple reduction algorithms. However, speed control performance is still influenced by the inherent uncertainty of the system such as parametric uncertainty, external load disturbances and unmodeled dynamics, and its exact mathematical model is much difficult to be obtained due to their strong nonlinearity. In this paper, the inherent uncertainty is approximated on-line by the RBFN, and an additional robust control term is introduced to compensate for the reconstruction error of the RBFN instead of the rich number of rules and additional updated parameters. Control law for stabilizing the system and adaptive laws for updating both of weights in the RBFN and a bounding constant are established so that the whole closed-loop system is stable in the sense of Lyapunov, and the stability proof of the whole control system is presented. Computer simulations as well as experimental results are presented to show the validity and effectiveness of the proposed system.

• 대한간호학회지
• /
• 제45권3호
• /
• pp.459-468
• /
• 2015

Purpose: The purpose of this study was to investigate the effects of Wheel of Wellness counseling on wellness lifestyle, depression, and health-related quality of life in community dwelling elderly people. Methods: A parallel, randomized controlled, open label, trial was conducted. Ninety-three elderly people in a senior welfare center were randomly assigned to two groups: 1) A Wheel of Wellness counseling intervention group (n=49) and 2) a no-treatment control group (n=44). Wheel of Wellness counseling consisted of structured, individual counseling based on the Wheel of Wellness model and provided once a week for four weeks. Wellness lifestyle, depression, and health-related quality of life were assessed pre-and post-test in both groups. Results: Data from 89 participants were analyzed. For participants in the experimental group, there was a significant improvement on all of the wellness-lifestyle subtasks except realistic beliefs. Perceived wellness and depression significantly improved after the in the experimental group (n=43) compared to the control group (n=46) from pre- to post-test in the areas of sense of control (p =.033), nutrition (p =.017), exercise (p =.039), self-care (p <.001), stress management (p =.017), work (p =.011), perceived wellness (p =.019), and depression (p =.031). One participant in the intervention group discontinued the intervention due to hospitalization and three in the control group discontinued the sessions. Conclusions: Wheel of Wellness counseling was beneficial in enhancing wellness for the community-dwelling elderly people. Research into long-term effects of the intervention and health outcomes is recommended.

• 복식문화연구
• /
• 제27권6호
• /
• pp.582-598
• /
• 2019

Intermedia is a term that refers to the convergence of different media. It has not only enabled the delivery of brand message but also developed interactive communication in a contemporary fashion show context. This study investigates the presentation methods of contemporary fashion shows affected by intermedia. We examined the research and theory related to intermedia and fashion shows by accessing articles since the 2000s concerning 252 shows by 30 designers that tended to demonstrate the use of intermedia. Our analysis highlighted four particular characteristics: "medium scalability" (the unity of art and fashion and the unity of life and fashion); "synesthetic flow" (the audience's emotional immersion, represented by the actual performance and performances of the models); "participatory accessibility" (performance participation through action and instrumental support); and "immaterial symbolization" (an intuitive symbol that emphasizes both the direct outward appearance and the metaphorical symbolism so that the object is expressed in a figurative sense). From these results, we identified considerable synergy between the characteristics of intermedia and contemporary fashion shows. Therefore, it might be useful to conduct an experimental study on this area of research.

• 대한한의학원전학회지
• /
• 제21권2호
• /
• pp.87-99
• /
• 2008

From pathological view, Gwoleumbyeong(厥陰病) may be explained as extreme reduction of Gwoleumgyeonggi(厥陰經氣) due to immoderate Wihan(胃寒). Also, concerning regions of human body, Gwoleumbyeong has close relation to lower abdomen and genital, which are the origins of Gwoleum meridian[厥陰經]. Therefore, it is appropriate that the nature of Gwoleumbyeong be described as Hangeukyangul(寒極陽鬱), rather than Sangyeolhahan(上熱下寒), Hanyeolchakjap(寒熱錯雜). Sangyeolhahan, Hanyeolchakjap does not represent Gwoleumbyeong to the full extent, in a sense that the term views Hanyeol(寒熱) as two equal rank, whereas pathogenesis of Gwoleumbyeong depends on the sole extremity of Wihan(胃寒). The reason that the nature of sanghallon(傷寒論) be regarded as Sangyeolhahan, Hanyeolchakjap has been lying on the presupposition that whole symptoms of Hangwol (寒厥), Yeolgwol(熱厥), diarrhea[下利], vomiting[嘔吐] and hiccup, from "Gwoleumpyeon(厥陰篇)",may be categorized into Gwoleumbyeong. However, the symptoms described above do not show Gihwa(氣化) characteristic of Gwoleum(厥陰) and follow the regional distribution of Gwoleumbyeong, from which it can be pointed that those symptoms have no relation with Gwoleumbyeong. Ever since the theory of Yukgigihwa(六氣氣化) was used to comprehend and interpret "Sanghallon", Gwoleumbyeong has been thought as equivalence of Gwol(厥), which led to misunderstanding of Sangyeolhahan, Hanyeolchakjap. However, Gwoleumbyeong from "Sanghallon" has been argued in specific, through the historical practice of Sanghan(傷寒) as pathogen, particular state of meridian and correlation of meridian and Byeongjeung(病證).

• Wind and Structures
• /
• 제13권3호
• /
• pp.235-256
• /
• 2010

The aeroelastic stability of bridge decks equipped with multiple tuned mass dampers is studied. The problem is attacked in the time domain, by representing self-excited loads with the aid of aerodynamic indicial functions approximated by truncated series of exponential filters. This approach allows to reduce the aeroelastic stability analysis in the form of a direct eigenvalue problem, by introducing an additional state variable for each exponential term adopted in the approximation of indicial functions. A general probabilistic framework for the optimal robust design of multiple tuned mass dampers is proposed, in which all possible sources of uncertainties can be accounted for. For the purposes of this study, the method is also simplified in a form which requires a lower computational effort and it is then applied to a general case study in order to analyze the control effectiveness of regular and irregular multiple tuned mass dampers. A special care is devoted to mistuning effects caused by random variations of the target frequency. Regular multiple tuned mass dampers are seen to improve both control effectiveness and robustness with respect to single tuned mass dampers. However, those devices exhibit an asymmetric behavior with respect to frequency mistuning, which may weaken their feasibility for technical applications. In order to overcome this drawback, an irregular multiple tuned mass damper is conceived which is based on unequal mass distribution. The optimal design of this device is finally pursued via a full domain search, which evidences a remarkable robustness against frequency mistuning, in the sense of the simplified design approach.

• 한국도서관정보학회지
• /
• 제14권
• /
• pp.181-215
• /
• 1987

Reading education is very important in order to promote the refinement, cultivate the emotion and complete the character to the secondary school students. This thesis deals with the establishment of reading education as a formal course in secondary schools, responsibility of teaching and problems related to recommended reading lists. Reading education must separate from the national language education because of literature centered education in reading education. If reading education was separated from the national language education, students can a n.0, pproach to the other cultural boundary besides other own and exchange their information and ideas. So, reading education must be included to the elective subjects in a independent course or become a compulsory subject in secondary school curriculum. The teacher of reading education must become the teacher librarian who has a firm faith and an intellectual accomplishment. But, teacher-librarian has much disadvantages such as the problems of promotion, the division of qualification between elementary school and secondary school, and a short-term training courses for teacher-librarian. Hence, theses problems music be solved in national administrative level. Recommended reading lists must be provided to the student in order to prevent confusion of the sense of value, to estimate their own reading ability by themselves and to establish life long reading plan. Therefore, both Korean Library Association and the Ministry of Education should re-examine and develop recommended reading lists. Finally, problems of a juvenile delinquency in the post industrial society have to be solved through reading education. To solve the juvenile delinquency problems, adolescents should cultivate their moral character and possesses abundant knowledge through reading education. Then, young adults will grow as sound citizen in the society.

• 한국콘텐츠학회논문지
• /
• 제8권3호
• /
• pp.138-145
• /
• 2008

인간의 감성을 이해하고 반응하는 인간 친화적 게임기술 개발은 게임을 디자인하는데 매우 중요한 요소이다. 게임에서 유발되는 감성 중 목표 감성에 도달하는 정도를 나타내는 의미로 게임성을 정의하는 것은 필요하다. 대부분의 감성관련 연구는 감성어휘 체계화를 통한 대표 감성을 추출하고 해당 디자인 소와의 연관관계로 감성을 평가하고자 하였다. 그러나 이러한 정의는 게임성에 대한 방향성을 이해하는데 긍정적인 면은 있으나 구체적이고 객관적인 플레이어의 감성을 표현 할 수 없는 단점을 가지고 있다. 본 연구에서는 이러한 게임성에 대한 체계적 이해를 위하여 형용사 시소리스를 이용함으로써 감성적 표현을 플레이어의 의도에 따라 정확하게 나타낼 수 있도록 형용사의 의미적 상관관계를 분석할 수 있는 방안을 제안하였다.

• International Journal of Advanced Culture Technology
• /
• 제9권2호
• /
• pp.47-55
• /
• 2021

The coronavirus disease 2019 (COVID-19) pandemic continuously influences on the health and well-being of people and communities worldwide. The purpose of this study was to explore the published research articles in the fields of nursing and health during the COVID-19 pandemic. The research design is an exploratory study. Samples are the abstracts of the articles from a literature database, PubMed, that were published from January 1st, 2020 to April 15th, 2021. We used a MeSH term, 'nursing' and "COVID-19" to retrieve articles that are related to COVID-19. Five hundred and fifty-five articles were retrieved. Two hundred and sixteen articles were excluded as they were not met the inclusion criteria. The total number of articles used in this study was three hundred and thirty-nine. The average number of articles published during the data collection period was 21.9. Seven topics were discovered from the abstracts of the articles: COVID-19 management and guidance; Perinatal COVID-19 and breastfeeding; Nurse; Health service and support; Patient care; Research; and Education and experience. This study revealed some interesting topics from the articles related to COVID-19 and provided some sense of research areas that may be interesting and allow us to develop important research questions about nursing science and nursing practice.

• 의료법학
• /
• 제8권1호
• /
• pp.215-234
• /
• 2007

The mission of the doctors is to take care of human life, body and health through the medical behaviors such as diagnosis and treatment. Under this job propensity, the doctors have care duty to take the best actions required to prevent the risk according to the patients' specific disease status. Such care duty of the doctor may be evaluated based on the medical behavior level at the medical institution and clinical medical study field. Such medical level should be understood in the normative level, considering the treatment environment, condition and specialty of the behavior, because it means the medical common sense known and acknowledged to the normal doctors. While the criminal suit requires the evidence for no doubt conviction, the civil suit requires more eased different standard. The results between the criminal and civil sentence may be different, because the confirmed former case may lead to long-term imprisonment and even death penalty, while the latter case puts only monetary penalty on the defeated party.

• 한국건설관리학회논문집
• /
• 제7권1호
• /
• pp.89-99
• /
• 2006

최근의 주택 개발사업은, 주택시장의 분위기가 사업의 중요 요인 중 하나였던 예전의 상황과 달리, 투자자금의 모집과 사업부지 물색 등의 어려움으로 타당성 분석의 정밀도가 점차 중요시 되고 있다. 주택 개발사업의 타당성 분석에 있어 토지의 이용 가치와 관련된 용적률, 상품수준에 관련된 분양비, 또한 금융비용에 영향을 미치는 공사기간은 중요한 요소이며, 본 연구에서는 이러한 용적률 분양비 공사기간을 개별 프로젝트의 고유특성인 계획특성으로 채택하였다. 따라서 본 연구는 타당성 분석의 체계적인 접근을 위하여 용적률, 분양비, 공사기간을 계획특성인자로 채택하여 타당성 분석 시 공동주택의 계획 특성이 분양원가에 미치는 영향을 회귀분석을 이용하여 분석하였다.