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해도분석을 통한 낙동강 하구 사주 면적의 시ㆍ공간 변화
유창일(CHANG-ILL YOO),윤한삼(HAN-SAM YOON),류청로(CHEONG-RO RYU),이인철(IN-CHEOL LEE) 한국해양공학회 2006 韓國海洋工學會誌 Vol.20 No.6
This study discusses characteristic of spatiotemporal changes of the sand barrier in the Nakdong estuarine for the last century, focusing on geomorphologic evolution and mobility of sand barriers in the view of coastal engineering. The Nakdong estuarine, the research subject, has a complexly changing natural environment by interaction between ground and marine elements such as ocean wave, tidal current, sediment, etc. Moreover, recently, unnatural geomorphologic changes (e.g., seaside reclamation, new harbor construction, etc.) has been radically increased in this area with increasing desire for coastal development. Because of this, its sand barrier has developed quite unstable condition. Therefore, to identify the development process of geomorphologic changes in this area, required is a close examination on historical characteristics of spatiotemporal changes of the sand barrier in relation to surrounding seaside reclamation and physical environmental changes. This study, based on the marine charts published in between 1927 and 1995 year, analyzes the length and area of the sand barrier for the last hundred years, and investigates the cause of the changes by looking into the change of water depth for the last two years and doing ocean-physical site observations. In conclusion, the sand barrier of the Nakdong estuarine expands toward the open sea by 7.4~26 m in annual average, maintaining a fixed distance of 1,241~1.279 m, and its area is expected to increase about 2.8 k㎡ annually. This is characterized by the wocean wave from the open sea and the discharge of Nakdong River.
Yoo, Dong-Geun,Kim, Kyoung-Jin,Lee, Gwang-Soo,Kang, Nyeon-Keon,Yi, Bo-Yeon,Kim, Gil-Young,Chang, Se-Won,Kim, Han-Joon Elsevier 2017 Quaternary international Vol.459 No.-
<P><B>Abstract</B></P> <P>The Korea Strait is a seaway connecting the East Sea with the East China Sea. The Plio-Quaternary stratigraphy and sedimentation on the Korea Strait shelf was studied using a dense network of high-resolution, single-channel seismic reflection profiles. The shelf sequences above the acoustic basement consist of seven depositional sequences separated by erosional unconformities corresponding to falls in sea level. Individual sequences are characterized by well-stratified and complex sigmoid-oblique prograding reflection configurations, reflecting a history of upbuilding and outbuilding in response to repetitive transgressive and regressive events driven by sea level changes. During the regression to lowstand of sea level, lowstand prograding wedges were formed seaward along the present shelf margin, whereas during the highstand of sea level, as in the present condition, highstand deposits were deposited in the inner shelf along the coast. However, as the subsequent regression began, the inner-shelf highstand deposits were severely eroded out and/or formed a condensed section. Volumetrically, the forced regressive and lowstand systems tracts are the most important components of the Korea Strait. Consequently, the Plio-Quaternary sequence in this area consists of a succession of stacked progradational lowstand wedges, mainly formed during the regression and lowstand of sea level.</P>
신장수여자의 수술경과시간에 따른 자기존경감, 희망감, 염려 및 스트레스원의 차이
이 철,김창윤,한오수,박인호,유희정,한덕종 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.2
This study attempted to examine the differences of self - esteem, hopes, concerns and total stress scores of 110 kidney recipients in before(N=32) and fellowing kidney transplantation [1 to 6 months(N=29), 6 to 12 months(N=23), 12 to 36 months(N=26)] and utilizing severity rating scale of 44 potential stressors on a 5-point scale of 110 kidney recipients in before(N=32) and following kidney transplantation operation [1 to 6 months(N=29), 6 to 12 months(N=23), 12 to 24 months(N=15) and 24 to 36 months(N=11)]. On scores of hopes and total stress, pretransplant group exhibited significantly higher scores than three posttransplant recipient groups. But, it was found that there was no significant differences among four transplant kidney recipient groups on the scores of self - esteem and concerns. In the pretransplant group, craving for foods was identified as the most stressful event, on the contrary, changes in friends was identified as the lowest stressful events. In the 1 to 6 months posttransplant group, side effect of medications was identified as the most stressful event, however, loss of contact with dialysis patients was identified as the lowest stressful event. In the 6 to 12 months posttransplant group, cost of medication, changes in body appearance were identified as the most stressful event, on the other hand, managing of medications at home was identified as the lowest stressful event. In the 12 to 24 months posttransplant group, cost of medication and insurance coverage were identified as the most stressful event, but possibility of dying and competence of nursing staff were identified as the lowest stressful event. In the 24 to 36 months posttransplant group, changes of body appearance was identified as the most stressful event, on the contrary, possibility of infection was identified as the lowest stressful event. Insurance coverage was a continuing concern throughout posttransplant period.
( Ah Young Leem ),( Chang Hoon Han ),( Chul Min Ahn ),( Tae Hoon Jung ),( Yu Il Kim ),( Jae Yeol Kim ),( Sang Haak Lee ),( Eun Mi Chun ),( Kwang Ha Yoo ),( Ji Ye Jung ) 대한결핵 및 호흡기학회 2014 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.118 No.-
Background: Smoking is known to increase the risk of chronic disease. Understanding of factors that contribute to smoking cessation may help to develop strategies for smoking behavior change. Methods: Pooled cross-sectional data of 11,924 subjects from the Korea National Health and Nutrition Examination Survey II-V were analyzed. The stages of change in smoking cessation were categorized into pre-contemplation, contemplation, and preparation. Baseline characteristics, socioeconomic factors, quality of life, psychological characteristics, and tobacco-related factors were compared between the groups. Results: The study population consisted of 32.4% in pre-contemplation, 54.4% in contemplation, and 13.1% in preparation group. While the proportion for pre-contemplation group (37.4% to 28.4%) tended to decrease from 2001 to 2012, that of preparation group (6.4% to 18.1%) tended to increase. The mean age of pre-contemplation group (48.4±16.2) is higher than comtemplation and preparation group (42.2±13.9 and 44.4±15.3; P=0.02). As levels of education and income status increased, the proportion of pre-contemplation tended to decrease, and that of preparation tended to increase. Proportion of blue collar job in pre-contemplation group was higher than in preparation group (67.9% vs 58.1%; P<0.001). In pre-contemplation group, percentage of suicidal ideation within 1 year was higher than contemplation and preparation group (19.3% vs 16.0% and 16.1%). Upon adjusting analysis, the proportion of pre-contemplation group increased with increasing age (OR=1.01; 95%CI 1.01-1.02), and smoking amount (OR=1.04; 95%CI 1.03-1.05). People of pre-contemplation group (vs. preparation) are be less educated (OR=1.99; 95% CI 1.51-2.62), are in single marital status (OR=1.25; 95%CI 1.04-1.50), have lower prevalence of cardiovascular disease (OR=0.48; 95%CI 0.31-0.76), and do less exercise walking (OR=1.36; 95%CI 1.09-1.69) and weight training (OR=1.59; 95%CI 1.35-1.85). Conclusions: We demonstrated a significant association between the stages of change in smoking cessation and age, education, marital status, cardiovascular disease, and amount of exercise.
만성 신부전증 환자의 중증 고혈당에 따른 의식변화 결핍에 대한 연구
박은주,강성귀,한상웅,김호중,이창범,임천규,박성광,윤경택,위형중,안유헌 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.6
In diabetic patients who were being treated with hemodialysis, coma and other neurological deficits did not occur in spite of extremely elevated serum glucose levels. In this report, we compared diabetic patients with renal failure in severe hyperglycemia with nonketotic hyperosmolar coma patients with normal renal function to know what affect mental changes. Mental changes were not present in diabetic patients with renal failure. These patients with renal failure showed more severe hyperglycemia, but corrected serum sodium concentration and calculated effective serum osmolality were low. So it is suggested that corrected serum sodium concentration and effective serum osmolality are more important factor affecting mental changes than high blood glucose levels in diabetic patients with renal failure, due to absence of osmotic diuresis.
비엔나 검사총집의 임상적용을 위한 한국표준화 연구(II):서울 성인군에 대한 Standard Progressive Matrices 검사
한오수,유희정,김창윤,박인호,이철 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.1
본 연구에서는 서울 거주 중산층에 속하는 20대 남녀 대학생 96명, 20대 일반성인 111명 및 30대 일반성인 88명을 대상으로 하여 SPM 검사의 표준화 연구를 실시하였다. 재검사 신뢰도는 0.72였고 내적일치도 계수인 Cronbach alpha 신뢰도계수는 .79였다. SPM검사와 Wechsler지능검사와의 상관은 .30이었다. 이에 따라 본 연구결과 SPM 검사의 신뢰도 및 타당도가 통계적으로 유의하였다. 본 연구에서 남녀간의 성별차이가 없었음은 물론 기존의 외국에서 이루어진 전산화된 검사결과와 비교할 때 두드러진 문화적 차이도 나타나지 않았다. 20대와 30대간의 유의한 차이는 연령증가에 따른 지능저하의 결과로 해석된다. 문항반응이론에 기초하여 SPM 검사를 구성하는 문항을 분석한 결과, 쉬운 문항수가 많은 편이었으나 전반적으로 문항의 난이도, 변별력 및 추측도가 비교적 적절하였다. 본 연구결과, SPM 검사가 비언어적인 지능을 측정할 수 있는 문화적, 교육적 및 성차에 별로 영향을 받지 않는 유용한 검사임이 입증되었다. 앞으로 진행될 연구에서는 지필검사를 통해 전 연령층으로 확장된 규준을 작성하여 정상인의 지능평가와 동시에 정신지체, 뇌기능장애를 비롯한 다양한 환자집단은 물론 학교, 산업장면에서도 활용토록하며 신경심리학적 평가도구로도 임상에서 유용하게 활용해야 할 것이다. This study was aimed to standardize the standard progressive matrices(SPM) test in the PC/S Vienna test system. The SPM test was administered to 295 adults in Seoul, comprised of 96 university students, 111 adults of twenties and 88 adults of thirties. The test-retest reliability of the SPM with an interval of 2 weeks was found to be .72. The internal consistency reliability of SPM as computed by Cronbach alpha was .79. product moment correlation between the full KWIS score and SPM was .30. The reliability and validity coefficients of the test were statistically significant. No significant sex differences were observed in this study. And no significant cross-cultural differences were noted when comparing the computerized SPM results studied by Luxemburg and the results of this study. But significant age differences were found between twenties and thirties. The results suggested that increasing in age might be a key factor in lowering of intellectual functions to adults. According to the item analysis based on the item response theory, the results showed that the SPM consists of many easy items, but the average 'item difficulty', average 'item discriminaion' and average 'guessing' were in the moderate level. Conclusionally, the SPM test may provide a culture-free, verbal-free promising tool for the measurement of nonverbal intelligence in a Korean context. Future study will be extending to range of sampling to include all aged normal group, mental retardation, other patient groups and industrial setting. In the future, SPM will be used to neuropsychological test in clinical settings.
엔드밀 형상에 따른 가공특성 분석을 이용한 형상설계 S/W 개발
한창규,고성림,유중학,서천석,김경배 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
The tool geometry parameters and cutting process have complex relationships. Until now, various cutting test were needed to acquire optimal design of end mill for the purpose of high speed machining, due to the insufficient knowledge about cutting process in high speed machining. Using various tools with different geometry, relationships between tool geometry parameter (rake angle, clearance angle, length of cutter) and cutting process (cutting force, surface accuracy, surface roughness) have been studied. Acquired data can be used to design optimal tool for high speed machining and developed tool geometry design S/W.
한창환,유태혁 大韓神經精神醫學會 1985 신경정신의학 Vol.24 No.4
Each of 404 nurses and nurse-aids rated their experience of each of 45 menstrual symptoms on a 4 point scale separately for the menstrual, premenstrual and intermenstrual phase. The 45 symptoms were tested separately by menstrual regularity and phase variable. 1. 4 basic types of menstrual symptoms were emerged which were labeled regularity significant type, phase significant type, regularity-phase significant type, and regularity-phase non-significant type. 2. Among menstrual cyclic symptoms belong to phase significant type and regularity-phase significant type, there are 3 basic subtypes. One(Subtype Ⅰ) is the symptoms which are manifested predominantly during menstrual phase. Second(Subtype Ⅱ) is the symptoms which are manifested predominantly during premenstrual and menstrual phase equally. Third(Subtype Ⅲ) is the symptoms which are manifested predominantly during premenstrual phase, but becomes more severe during menstrual phase. 3. Psychosocial variable such as neurotic trends and suggestions might be considered to be responsible for menstrual regularity. However neuroendocrine change might be considered to be responsible for menstrual phase.