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KHFe(CO)_4-HCHO系를 利用한 Nitro 및 Nitroso化合物의 환원 N-메칠화 반응
沈相喆,閔庚隱,嚴在國,洪錫 경북대학교 1978 논문집 Vol.10 No.-
The reduction of nitro and nitroso compounds using tetracarbonylhydridoferrate-formaldehyde under mild conditions (at room temperature and then 60℃ under CO) gives the corresponding N, N-dimethylation via N-methylation in good to excellent yields. The reaction mechanism via immonium salt is assumed.
산복도로에서 보는 釜山港 景觀의 構圖的 特徵 에 관한 硏究
심은경,강영조,김승환,남정칠,박승범,이기철,박한우 동아대학교 건설기술연구소 2000 硏究報告 Vol.24 No.1
This study is to clarify the characteristics of the type of view on a prospect from the road view, approach to the purpose of the maintenance plan of the road view. First, in the viewpoint of view is understanding meaning of the road, the method come into contact with a road view. Second, in the view appear an object land is grouping to the road view and presentation to a point in dispute and a settlement. This study have the keynote to different a form of view depend on viewpoint in a point view of prospect of road view, it will be presentation of practice method to the maintenance plan of the road view of the future.
다이아몬드상 카본 박막의 레이저공정 변수에 따른 상변이와 내마모성 특성변화
심경석,차금환,이상렬,김대은 연세대학교 산업기술연구소 1999 논문집 Vol.31 No.2
Diamond-like carbon(DLC) thin films have been fabricated by pulsed laser deposition method with various deposition parameters. The characterization of fabricated thin films was performed depending on the deposition parameters. As the kinetic energy provided by deposition temperature and the laser energy density were increased, the film showed graphite properties. Structural properties of the films were investigated by Raman spectroscopy. The growth energy should be optimized to fabricate high quality DLC thin films. DLC films showed high hardness and their friction coefficients were measured to be about 0.2 regardless of the load of the ball pin.
아동의 사회적 문제해결능력과 어머니의 대화형태와의 관계연구
김재림,백은주,신유림,심미경,이혜경 연세대학교 생활과학대학 1985 婦學 Vol.18 No.-
The present study investigated the relationship between the social problem solving ability of children and the language patterns of their mothers. The subjects included 193 nine yearolds (185 girls, 108 boys), and 230 twelve yearolds (115 girls, 115 boys). The instruments used were a language patterns test for the mother and IPA (Interpersonal Problem Solving Ability Test) for children. Major finding from this study were: ⑴ the correlation between the social problem solving ability of children and the language patterns of their mothers was not statistically significant, ⑵ the language patterns of the mothers were significantly different by child's sex; for boys, mother used more ordered language patterns and for girls, mothers used more ordered language patterns and for girls, mothers used more humanoriented language patterns, ⑶ the social problem solving ability of children were significantly different by child's age; 12yearolds exhibited higher ability than 9yearolds.
학업우수 초등학생 자녀를 둔 어머니의 진로지도 경험에 관한 질적 연구
하정,이항심,정혜윤,김은덕,유성경 한국직업능력개발원 2007 직업능력개발연구 Vol.10 No.3
본 연구는 학업우수 초등학생 자녀를 둔 어머니의 진로지도 경험을 한국의 사회·문화적 맥락에서 밝히고자 하였다. 이를 위해 서울지역에 살고 있는 초등학교 6학년인 학업우수아의 어머니 9명을 심층면담하고, 질적 연구 방법으로 분석하였다. 연구 결과, 107개의 개념과 44개의 하위 범주, 그리고 14개의 범주가 도출되었다. 어머니들의 진로지도 경험을 포괄하는 핵심범주로는 '자녀의 성취를 위해 자녀의 특성을 존중하고 자녀의 자율성을 키우면서 자신이 바람직하다고 여기는 방향으로 이끌어감'으로 밝혀졌다. 연구 결과를 바탕으로 학업우수 초등학생 자녀를 둔 어머니의 진로지도 경험의 실체를 논의하였으며, 부모를 대상으로 한 진로교육프로그램의 필요성과 후속 연구에 대한 제언을 하였다. This study examined the experience about career guidance of mother who has a academically talented child in Korea. Nine mothers were interviewed and the interview data were analyzed based on the Qualitative Research Method. Result has107 concepts, 44 subcategories and 14 categories. The core category is "The mothers consider their children's characteristics for the children's accomplishment and foster children's self-control and lead their children to desirable object the mothers view".Implications of the results and suggestions for future research are discussed.
이수진,송재철,장은철,이경영,심상효,박시복,박영재,김현주 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.3
Objectives: The effect of chronic exposure to low levels of n-hexane on peripheral nervous system and the relationship between duration of employment and impairment of peripheral nervous system was studied. Methods : In 21 workers at two shoe-maker factories and 21 unexposed controls, measurement of exposure of solvents, symptom Questionnaire, physical examination and electrophysiological study were conducted. Results : Mean ages of study subjects in the exposed and the unexposed were 39.9 and 40.1 years old. Mean durations of employment were 15.1 and 10.0 years, respectively. Mean concentrations of urinary 2.5-HD were 2.23 mg/g creatinine, 0.23 mg/g creatinine, respectively. Mean concentration of solvents in air were 21.1 ppm of n-hexane, 72.2 ppm of toluene and 0.5 ppm of MEK. There were no differences in the prevalence of subjective symptoms and abnormal neurological signs between the exposed and the unexposed. But vibration extinction time(VAT) of the exposed (8.8 second) was shorter than that of the unexposed (11.9 second) (p<0.05). Mean values of electrophysiological studies(EPS) of the two groups were within normal limit. However, mean conduction velocity of median motor nerve and median F wave(MMNCV and MFCV), mean amplitude of median sensory action potential(MSAP) were decreased in the exposed (p<0.05). Moreover, the rate of abnormal finding more than one in sensory nerves was increased in the exposed than those in the unexposed(p<0.05). Correlation coefficients between duration of employment and mean conduction velocity of median sensory nerve (MSNCV) and between duration of employment and MFCV were -0.57, -0.43, respectively (p<0.05). Conclusions : These results showed that chronic (mean 15 years) low level(mean 23 ppm) exposure to n-hexane cause subclinical impairment of peripheral nervous system. These results also suggest that the longer duration of employment, the shorter values of EPS and VAT.
Single port access compared with three port laparoacopic adnexal surgery in a
( Eun Jung Shim ),( Eun Hee Yoo ),( Sun Kyung Lee ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.98 No.-
Surgical outcomes were compared prospectively and randomly between conventional three ports and single port access laparoscopic adnexal surgery. From June 2010 to June 2011, 73 patients were enrolled in this study and randomly assigned them into either single (38 patients) or three port group (35 patients). Data measures included postoperative pain, duration of operation, length of hospital stay and scar-related outcomes. Scar related outcomes were collected at 1 and 6 comths postoperatively. Vancouver Scar scale which is the most frequently used scar assessment scale was examined by the independent observer. All of the patients were asked about scar related symptoms with pain and scar satisfaction by numerical rating scale. Mean follow-up was 12.5 months. Demographics and clinical outcomes did not differ except scar related outcomes between two groups. The Vancouver Scar Scale was similar between two groups at postoperative 1 and 6 months. There was no difference in the scar satisfaction scales between two groups at postoperative 1 month. However, the scar satisfaction scales were significantly higher in single port group at postoperative 6 months, indicating a favorable cosmetic outcome. There was a decreasing tendency of scar satisfaction at postoperative 6 month in conventional group, it was not statistically significant. The clinical outcomes of single port laparoscopic adnexal surgery were comparable to those of the conventional three port surgery. The better cosmetic outcome was evident in single port laparoscopic surgery group at postoperative 6 months.