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최용훈 ( Yong Hun Choi ),원철희 ( Chul Hee Won ),박운지 ( Woon Ji Park ),신민환 ( Min Hwan Shin ),신재영 ( Jea Young Shin ),이수인 ( Su In Lee ),최중대 ( Joong Dae Choi ) 한국물환경학회 ( 구 한국수질보전학회 ) 2012 한국물환경학회지 Vol.28 No.3
In this study, Song-Cheon river Basin located at Dae-kwan-lyong Meyn in Kang-Won Province was monitored to analyze characteristics of non-point source pollution during the snowmelt period. The characteristics of NPS pollution such as runoff, change in water quality and pollutant loads by snowmelt were investigated from 23th February 2010 to 27th April 2010. The results showed that The climate change effects flow, turbidity and concentration of SS and COD with showing similar trend of fluctuation. Daily pollutant loads per unit area were SS 74.43 kg/ha/day, COD 1.25 kg/ha/day, BOD 0.21 kg/ha/day, TN 0.717 kg/ha/day, TP 0.141 kg/ha/day and the flow weight mean concentration has been SS 985.97 mg/L, COD 16.28 mg/L, BOD 2.67 mg/L, TN 9.302 mg/L, TP 1.834 mg/L, respectively. The flow and pollutant loads both of SS and of COD significantly increased during the snowmelt period. Because structurally loosen soil by freezing and thawing deteriorates water quality, research and management measures will be needed.
[논문]스트렷-타이 모델에 의한 사각형 단면 코벨의 설계 기법
김대성,김태완,이승훈,엄장섭,진치섭 釜山大學校生産技術硏究所 2004 生産技術硏究所論文集 Vol.63 No.-
콘크리트 코벨은 D-영역을 갖는 대표적인 구조물로서 복잡하고 다양한 형상의 파괴메커니즘을 보인다. 이는 응력집중과 기하학적인 불연속으로 일반적인 보 이론의 적용이 불가능하여 해석 및 설계에 어려움이 많다. 본 연구에서는 지압파괴,압축파괴 및 전단파괴를 유발하는 복잡한 파괴메커니즘을 형성하고 있는 사각형 단면 코벨의 거동 및 파괴형상을 예측하고 스트릿-타이 모텔을 적용하여 해석 및 설계를 하였다. 또한 현행의 설계방법과의 비교를 통하여 스트렷-타이 모델이 보다 합리적이고 경제적인 설계방법임을 보였다.
변압기 보호를 위한 Fuzzy Decision Making 알고리즘
강대훈,이승재,강상희,권태원 明知大學校 産業技術硏究所 1999 産業技術硏究所論文集 Vol.18 No.-
This paper presents a new fuzzy decision making algorithm for power transformer protection based on the Dempster-Shafer's theory of evidence. To distinguish internal faults from other transient states, four input variables are selected. Each time dependent fuzzy rule base is composed of twelve fuzzy if-then rules associated with their basic probability assignments (BPAs) for singleton - or compound-support hypotheses. Dempsters rule of combination is used to process the fuzzy rules and get the final decision. The proposed algorithm also has a capability to identify the inrush, over-excitation and external fault with current transformer (CT) saturation besides the internal fault.
동일한 혈관 내에 발생한 이식형 약제 주입기 카테터의 위치이상
오대석,김영재,김명훈,조광래,임세훈,이정한,이근무,정순호,신치만 仁濟大學校 白病院 2010 仁濟醫學 Vol.31 No.-
저자들은 56세 여성 환자의 왼쪽 쇄골 하 정맥에 시행한 이식형 약제주입기 카테터의 삽입 후 발생한 비정상 위치에 대한 증례를 보고하고자 한다. 카테터의 끝은 환자의 늘 어진 가슴, 체위, 신체의 움직임, 카테터의 유동성 등의 영향으로 천자된 정맥 내에서 견인되고 뒤쪽으로 이동하였다. 환자는 어떠한 증상도 호소하지 않았지만 비정상 위치의 카테터는 심각한 합병증을 유발할 수 있기 때문에 제거되었다. 따라서 시술자는 약제주입기 삽입 전에 환자의 신체 상태와 단순 흉부 촬영상을 확인하고 카테터의 비정상 위치가 발생할 수 있는 위험 징후를 알아차려야 하겠다.
박종훈,전은석,구대회 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2
To assess the functional significance of long axis movement which would reflect the fiber orientation of the ventricular muscle, we examined the mitral annulus motion and compared it with standard minor axis movement. M-mode echocardiogram were performed in 24 healthy individuals and 17 mitral valve replaced (MVR) patients with simultaneous EKG and phonocardiogram recordings. The results were as follows : 1. In the controls, the onset of shortening of long axis preceeds that of minor axis (phase difference : 20±3msec, mean± SEM) but in MVR patients this phase difference was reversed (-33±8msec). It means that the spherical shape changes which can be observed in normal controls during isovolumic contraction period were lost in MVR patients. 2. In MVR patients, the time intervals from A2 to the end of shortening of long axis were significantly delayed compared with normal controls (54±3 VS 90±8 msec, P<0.01). 3. In MVR patients, the delayed shortening of long axis was observed in amplitude as well as in time. In summary. we observed the regional nonuniformity between long axis and short axis in normal control and interpreted that it could play a role in modulating ventricular function which was lost in MVR patients.
김대중,박성훈,정혁 조선대학교 부설 의학연구소 2000 The Medical Journal of Chosun University Vol.25 No.1
Background : This study is a clinical evaluation and statistical analysis on the cases of ectopic pregnancies who were surgically treated and histopathologically confirmed at the department of obstetrics and gynecology at Chosun university from January, 1995 to October, 1999. Results : 1. The hospital incidence of ectopic pregnancy was 1 in 10 deliveries and the most frequently age group was in 30~34 years of ages(33.3%). 2. Nulligravida was in 22.2% and the percentage of cases who had 1, 2, and 3 or more artificial abortion were in 30.0%, 19.8%, and 28.0% respectively and nullipara was in 35.4% and the percentage of cases who had 1, 2, and 3 or more deliveries were in 26.3%, 24.7%, and 13.6% respectively. 3. A previous history of appendectomy was in 12.3% and other abdominal surgeries were in 17.4%, pelvic inflammatory disease in 5.8%. 4. On symptomatology skipped menses was observed in 87.2%, lower abdominal pain in 86.0%, and bloody vainal discharge in 60.9%. 5. The mean duration from the first day of the last menstrual period to the date of operation was about 7 weeks. 6. The urine pregnancy test was positive in 75.5% and culdocentesis in 94.2%, Average serum β -hCG(human chorionic gonadotropin) level was about 3,200mIU/mL. 7. The most common site of ectopic pregnancy was salpinx in 91.7%. In the cases of tubal pregnancy, the lesion was most commonly located at the ampulla portion(82.3%) and ruptured tubal pregnancies were in 54.3%. 8. The amount of intraperitoneal free blood was 101~500ml in 29.2%, 501~1000mL in 31.3% and 1001~2000mL in 26.4%.91. Other abnormal pelvic conditions were noted in 30.5% and adhesion was in 13.6%. 10. The operative procedures were salpingectomy in 80.7%, salpingo-oophorectomy in 6.5%, corneal resection in 6.2%, and were laparoscopic operation in 24.3%, laparotomy in 75.7%. 11. There was no fatal case in 243 ectopic pregnancy.
李大憲,禹德均,表昌祐 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-
In a development environment for embedded system with a connection between host and target system, the linking loader of host system links the cross-compiled object file and a modules of target system and downloads the linked object file to the target system. In this research, we separate this linking loader into the module dependent on object file format and the module independent on object file format. The dependent module gets the linking information independent of file format from the object file, and the independent module actually does the linking process with this linking information. We implemented the dependent module by using BFD library of GNU development environment, and this implementation can improve the portability of our linking loader for a new target system or object file format. Currently, we developed this linking loader in the embedded system development environment ESTO to be prepared for a commercial product.
권대훈 안동대학 학생지도연구소 1988 學生指導硏究 Vol.8 No.1
This article examines motivational perspective of Bandura's self-efficacy theory and reviews recent research articles which was performed to test its predictions in academic achievement situations. First, motivational perspective of self-efficacy framework is discussed Self-efficacy refers to personal judgment about one's capability to organize and implement behavior in specific situations. As a proximal mediating mechanism, self-efficacy is hypothesized to influence task motivation (effort expenditure and persistence), choice of activities, and thought patterns people acquire their efficacy information from their performance accomplishments, vicarious experiences, verbal persuasion, and their physiological states. People judge (percept) their efficacy in specific situations through inferential process in which these information are weighted and integrated with respect to various efficacy cues such as perceived ability, effort expenditure, external aids, outcome patterns. Second, self-efficacy perspective is compared with locus of control, attribution theory, self-worth theory, and learned helplessness. Third, recent studies performed under the rubric of self-efficacy are divided into those upon student efficacy and those upon teacher efficacy, and reviewed separately. Studies which successfully enhanced student self-efficacy are reviewed under the headings of reward, attributional feedback, goal-setting, social comparision, and strategy training with their educational implications. And the nature, antecedents, and consequences of teacher efficacy are discussed according to the self-efficacy framework. Also the relations of student efficacy, teacher efficacy, achievement, and other related variables are explored. Finally, some directions for future research are suggested.
정대훈,장은영,변건식 東亞大學校附設 情報技術硏究所 2004 情報技術硏究所論文誌 Vol.12 No.1
The randomness of the wireless environment degrades the system performance considerably. One of the effective techniques to mitigate the randomness is diversity techniques. The basic idea of diversity techniques is to transmit/receive multiple replica of the information through independent channels. In this paper, the time-space diversity is studied and simulated. Also character of SISO, MISO, SIMO, MIMO is studied and simulated.
박정훈,강대옥,박재국 한국특수아동학회 2003 특수아동교육연구 Vol.5 No.1
본 연구는 통학교육에서 장애유아의 적용기술에 대한 교사의 인식을 조사하기 위한 것으로 통합교육 프로그램을 준비하고, 실제적인 교육을 수행하는데 필요한 기초자료를 제공하고자 하였다. 부산시 유아교육기관의 일반교사 97명과 특수교사 60명을 대상으로 통합교육에 필요한 적용기술에 대한 인식을 설문지를 이용하여 조사한 결과 다음과 같은 주된 결론을 얻었다. 첫째, 통합교육에서 요구되는 적응기술에 대한 인식에서는 일반교사와 특수교사 사이에 차이가 없었으나, 하위 영역에서 특수교사들이 일반교사보다 적응기술의 중요성을 높게 평가하고 있다. 둘째, 통합교육에서 요구되는 적응기술의 하위영역에서 특수교사들은 집단활동 참여기술을 가장 중요하게 인식하고 있으나, 일반교사들은 독립생활기술을 가장 중요하게 인식하고 있다. 셋째, 장애유아 적응기술에 대한 교사변인에 따른 인식차이에서 통합경험이 없는 교사들이 적응기술을 중요하게 인식하고 있으며, 특수교육관련 연구경험이 없는 교사가 연수경험이 있는 교사보다 적응기술을 더 중요하게 인식하고 있다. 넷째, 성공적인 통합교육을 위한 교사의 의견에서는 교사의 긍정적 인식 및 태도를 가장 중요한 요인으로 인식하고 있으며, 학부모의 긍정적인 인식과 일반유아의 이해도 주요하다고 인식하고 있다. n This study aimed to determine teachers recognition of the adaptation skills of handicapped children for mainstream education and to provide basic materials for the successful execution of the programs to be prepared for mainstream education and actual mainstream education. This study considered 97 preschool teachers and 60 special teachers who were selected using random sampling, in Busan Metropolitan City. Questionnaires were distributed and collected, with responses reviewed and analyzed using SPSS Win 10.0. Results show no significant difference in the recognition of general adaptation skills of handicapped children required in mainstream education between special teachers and preschool teachers. In contrast, there is difference between the two groups in the sub-spheres of adaptation skills, in which spheres the importance of adaptation skills was more highly regarded by special teachers in the actual kindergarten education than ordinary kindergarten teachers thought. On the other hand, special teachers valued skills of participating in group activities the most in the sub-spheres of adaptation skills required in mainstream education while preschool teachers prioritized independent skills. To narrow such difference in recognition, correct understanding of and active exchange of information in mainstream education should be developed. In addition, teachers without experience in mainstream education were found to require a higher level of adaptation skills from handicapped children compared to teachers with experience in mainstream education. Likewise, teachers without educational training valued adaptation skills more compared to teachers with educational training. Both special teachers and preschool teachers expected a higher level of adaptation skills from handicapped children compared to mainstream education teachers. This suggests that special teachers or teachers without experience in mainstream education demanded a higher level of adaptation skills than actually necessary in mainstream education. The recognition of teachers also varied depending on the educational institution they belong. Finally, teachers considered the positive recognition and attitude of teachers, positive recognition of students parents, and understanding of children as mojor contributory factors to successful mainstream education.