미세 패턴에서 공정 여유도를 고려한 선폭 분석

정연운,조선영,오진경,오혜근 漢陽大學校 工學技術硏究所 1997 工學技術論文集 Vol.6 No.1

The linewidth variation with different process variables, such as exposure dose, thickness of PR, thickness of thin film, and the optical property of thin film, was studied for deep UV light and resist developed 0.25 μm isolated line pattern. We found that the PR thickness which gave minimum linewidth showed larger exposure latitude and smaller linewidth variation compared to the PR thickness which gave maximum linewidth. Thus it will provide better process latitude and smaller linewidth variation if we use this PR thickness.

학동기 비만아의 체형의 차이에 따른 영양실태 비교 연구

정영혜,윤진숙 啓明大學校 生活科學硏究所 1993 科學論集 Vol.19 No.-

Among 911 children at 6th grade in primary school in Daegu, 103 children were selected to constitute obesity group and 132 were selected to constitute control group. Obese children were assorted into two groups-upper body obesity and lower body obesity group-by WTR. Physical indices, general characteristics, food habit and nutrition status of children were measured and compared. The results of this investigation are as follows: 1. The entire subjects had 146.0cm of height, 38.6kg of weight, 18.0 of BMI, 1.37 of WTR and 0.81 of WHR on the average. 2. While obesity rate of entire subjects was 11.3%, obesity rate in male children was 16.7% and that of female ones was 5.5%. Upper body obesity constituted 23.3% of the entire obesity group and lower body obesity constituted 11.7%. Male children showed higher obesity rate than female ones. 3. The higher the socioeconomic level and parents education level, the higher obesity prevalence. Obesity group had significantly less preference to sports and physical exercise than control group. 4. Skinfold thickness of the obesity group was significantly higher in both triceps(p<0.0001) and abdomen(p<0.0001) than that of the control group. Upper body obesity group showed significantly higher skinfold thickness than lower body obesity group(triceps: p<0.05, abdomen: p<0.05). 5. Control group significantly preferred vegetables and seaweeds. Upper body obesity group liked most of food better than lower body obesity group with the exception of milk and milk products, seaweeds and mushrooms. 6. In obesity inducible eating pattern score, there was no significant difference between obesity group and control group. Upper body obesity group and lower body obesity group also showed no significant difference. 7. In comparison of nutrients intake, energy intake of obesity group was significantly greater than that of control group(p<0.01). Energy intake of upper body obesity group was also significantly greater than that of lower body group(p<0.05).

임부의 연령에 따른 보완대체요법에 관한 인식 태도 경험 비교 연구

김연진,김지연,노경민,신혜리,유예지,이지민,장희조,정아인,최소정,강숙정,이향연,민혜영 이화여자대학교 간호과학대학 2016 이화간호학회지 Vol.- No.50

Purpose: This study aims to test if the age of pregnant women affects the perception, experience, and attitude towards complementary alternative therapy (CAT), by investigating the perception, experience, and attitude of pregnant women under the age of 35, and above 35 (Advanced Maternal Age). The study will 1) find the general characteristics of pregnant women under and over the age of 35 2) compare the perception, behavior, and experience of pregnant women under and over the age of 35, and 3) find the comparison of the perception, behavior, and experience according to the general characteristics of pregnant women under and over the age of 35. Method: The subjects of this study are composed of 44 women under the age of 35 and 44 women above the age of 35, totaling 88 pregnant women visiting midwiferies, obstetrics and gynecology, and baby fairs in Seoul and Gyeong-Gi area. Data for this study was collected from November 28, 2015 to January 6, 2016 for 40 days. The collected data analyzed mean, standard deviation, t test, ANOVA, and chi-square by using SPSS 23.0. Result Results show that there is a significant difference in the perception, attitude, and experience of the two-sample groups in the use of CAT. The question of “what is most necessary when applying CAT in a hospital clinical environment” for the perception criteria came out with the results of t=9.980, p<.05. For the attitude, results showed that the answers of pregnant women under the age of 35 displayed a more positive attitude towards CAT. (t=2.421, p<.05) Lastly, in the experience section, pregnant women under the age of 35 showed more CAT use than the other sample group. Conclusion Results have shown that there is a difference in the perception, behavior, and experience between the two sample groups. Therefore further research on the efficacy and the adverse effects of CAT needs to be done.

"부유" 단감의 묘목 생산에 관한 연구

정순재,이용재,김혜진,이영병,이용문 東亞大學校附設 農業生命科學硏究所 1999 農業生命資援硏究 Vol.8 No.1

'부유' 단감의 접목시기별 묘목의 생장과 토양 깊이별 접목 후의 생장을 알고자 시험한 결과는 다음과 같다. 대목싹은 접목시기가 늦을수록 많은 경향을 나타내었다. 접목 활착율은 시기별로 보아 5월 21일까지는 차이가 없었고 5월 30일은 7%정도 약간 낮았다. 접목일수와 접목활착일의 차이는 접목시기가 늦을수록 단축되었다. 접목 일자가 빠른 4월 25일, 5월 1일 접목구의 신초장은 상지보다 하지가 5.17cm 5.33cm가 더 길었다. 그리고 그 외는 대부분 상지가 하지보다 좋은 현상을 나타내었다. 시기별 접목에 관계하지 않고 근의 직경이 큰 구가 신초 신장이 큰 효과를 나타내었다. 토양의 깊이별 묘목 생장은 25cm 구가 신초의 직경이 크고 신초장이 가장 길었다. The study was conducted to assess the growth and development of 'Fuyu' grafted nursery plant according to various grafting time and soil depth. The earlier grafting time was taken, the more shoots were got rid. The cv. 'Fuyu' was grafted on the rootstock of Kyungsan Bansi cv. After grafting, graft-take rates was not showed any difference until on may 21 however it was little bit low on may 30. The later grafting time was taken, the more graft-take days were shortened. Bottom shoot length of scion was 5.17cm longer than top's on April 25 and 5.33cm longer than top's on April 1. Top shoot length was longer than bottom shoot length most of other days. The growth and development of persimmon seeding was related to root weight. The growth and development of persimmon tree according to the soil depth showed beter results in the 25cm treatment than any other treatments.

회맹장 및 대장을 침범한 장 결핵에 있어서 바륨을 이용한 방사선 이중조영촬영 소견에 대한 연구

진용현,전혜정,이용근,강철호,조성범,김윤환,박철민,차상훈,김일영,이혜경 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

To determine the characteristic double contrast barium enema findings of ileo-cecal and colonic tuberculosis and to make differential diagnosis from other bowel inflammatory disease. Sixty-seven patients confirmed as ileo-cecal and/or colonic-tuberculosis in six hospitals were evaluated retrospectively. The diagnosis was proven by endoscopic biopsy, surgery, and clinical follow up. Nine of 67 patients were excluded because radiologic findings were normal though endocopic biopsy examinations resulted in tuberculosis. Histopathological diagnosis were madein 58 cases as follows: endoscopic biopsy(n=29), operation(n=12), follow up examination(n=14), tissue culture(n=1), laparoscopic biopsy(n=2). There were 30 men and 28 females. The mean age were 36 yrs(range:16-67), 34 patients were in the second and third decade. The distribution of lesions, morphological characteristics, mucosal changes, ulcer shape and depth, associated with other tuberculous lesion, multiplicity were retrospectively analyzed in the findngs of double contrast barim enema. The commonest clinical symptoms were abdominal pain(n=35, 60%) and diarrhea(n=18, 31%). The chest radiography revealed association of pulmonary tuberculosis in 39 cases. Tuberculous lesions of other organs except chest were present in five cases. Double contrast barium enema findings showed a thickening and irregularity of intestinal mucosal fold(n=29, 50%), bowel contraction and/or shortening(n=26, 45%). There were small, nodular, superficial ulcers in the case of ulcer depth less than 2 mm in the depth. As many as 39 cases(67%) in this series had two or more lesions in the intestinal tuberculosis. The involved segment revealed symmetrical feature(n=21, 36%). Inflammatory pseudopolypoid lesions were noted in 30 cases(52%). The ileo-cecal region was involved in 38 cases(66%). The ascending colon(n=25, 43%) was the second commonest site with or without contiguous cecal involvement. Lesions in terminal ileum, ileo-cecal valve, transverse colon, descending colon and appendix were seen in 19, 18, 18, 12 and seven cases, respectively. Among 18 cases of ileo-cecal valve lesions, there were incompetency in nine cases(16%) and wide gapping in four cases(7%). In 14 cases, tuberculous enterocolitis was diagnosed by clinical follow-up and double contrast barium enema study. 12 out of 14 cases, the findings of double contrast barium enema of tuberculous enterocolitis were normalized after anti-tuberculous medication. However, two cases showed more aggravated state than before due to inappropriate treatment. Double contrast barium enema plays an important role in the diagnosis of tuberculous enterocolitis, determines the type, site and extent of the involvement and helps in treatment guide by using sequential studies.

개의 콜레스테롤 담석 증례

전혜영,박성환,한재익,이숙진,김근형,정동우,나기정 충북대학교 동물의학연구소 2006 Journal of Biomedical and Translational Research Vol.7 No.1

본문참조

지황류 생약의 항당뇨에 관한 비교 연구 : 지황류 엑스가 Streptozotocin 유발 고혈당 흰쥐에 미치는 영향

정혜진,김일혁 중앙대학교 약학연구소 1990 약학 논총 Vol.4 No.-

The studies were attempted to compare the antidiabetic activities of Relumanniae Radices on the hyperglycemia induced by streptozotocin in rats. The water fractions and methanol fractions of roots of Rehmanniae Radices were administered before and after injection of streptozotocin(45mg / kg, i.p.), and blood glucose, serum cholesterol and serum triglyceride levels were determined at 96 hours after streptozotocin injection. The results were following ; 1. The blood glucose levels of streptozotocin-induced hyperglycemic rats were dose-dependently decreased by the administrations of various fractions of the Relunanniae Radices. Partivularly, the administrations of the water fractions(200mg / kg, p.o.) of Rehmanniae radix siccata and Rehmanniae radix preparata were significantly shown to diminish when comparing with streptozotocin control group. 2. The serum total cholesterol levels of streptozotocin-induced hyperglycemic rats were significantly decreased by the administrations of the water fractions(100mg / kg, 200mg / kg, p.o.) of Rehmanniae Radices. But, the nethanol fractions(100mg / kg, 200 mg / kg, p.o.) of Rehmanniae radix aquosa were slightly decreased. 3. The serum triglyceride levels of streptozotocin-induced hyperglycemic rats were significantly decreased by the administrations of the water fractions(100mg / kg, 200mg / kg, p.o.) and the methanol fractions(100mg / kg, 200mg / kg, p.o.) of Relumanniae Radices.

모멘트 변화에 따른 브라켓과 교정용 선재 사이의 마찰력 변화

정혜진,임성훈,김광원 대한치과교정학회 2007 대한치과교정학회지 Vol.37 No.2

본 연구의 목적은 모멘트 변화에 따른 건조 환경과 타액 환경에서의 스테인리스강 브라켓과 여러 종류의 교정용 선재 사이의 마찰력을 비교하는 것이었다. 실험에는 0.022" × 0.028" 스테인리스강 브라켓과 0.019" × 0.025" 스테인리스강, 베타-티타늄, 니켈-티타늄 선재가 사용되었다. 활주 이동될 브라켓에는 0.9 mm 직경의 스테인리스강 선재로 제작된 길이 10 mm의 레버를 부착하였으며 레버에 100 g, 200 g의 추를 부착함으로써 브라켓에 각각 1000 g·mm (100 g × 10 mm), 2000 g·mm (200 g × 10 mm)의 모멘트를 가하고 만능시험기를 이용하여 마찰력을 측정하였다. 모든 조건에서 스테인리스강 선재가 가장 작은 마찰력을 보였으며 베타-티타늄과 니켈-티타늄 선재 사이에서는 2000 g·mm 모멘트의 인공타액 하의 조건에서를 제외하고는 마찰력의 유의한 차이가 없었다. 모든 선재에서 모멘트가 1000 g·mm인 때보다 2000 g·mm일 때 마찰력이 더 컸다. 건조 환경과 타액 환경의 비교에 있어서 1000 g·mm의 모멘트 하에서 인공타액에 의해 스테인리스강 선재의 마찰력은 증가하였으나 베타-티타늄과 니켈-티타늄의 마찰력은 증가하지 않았으며, 2000 g·mm의 모멘트 하에서 인공타액에 의해 모든 종류의 선재에서 마찰력이 증가하였다. Objective: The purpose of this study was to compare changes in frictional resistance between the bracket and wire under dry and wet conditions according to a change in moment. Methods: A stainless steel bracket of 0.022" × 0.028" slot, and 0.019" × 0.025" stainless steel, beta-titanium, and nickel-titanium wires were used. A 10 mm length lever was attached to the test (sliding) brackets to generate a moment. The experimental model was designed to allow tipping until contacts were established between the wire and the mesiodistal edges of the bracket slot. The moment was generated by suspending a 100 g or 200 g weight on the end of the lever. The moments applied were 1000 g·mm (100 g × 10 mm) and 2000 g·mm (200 g × 10 mm). The test brackets were ligated with elastomeric ligature for a constant ligation force and the fixed brackets were ligated with stainless steel ligature. Brackets were moved along the wire by means of an universal testing machine, and maximum frictional resistances were recorded. Results: Stainless steel wire showed least frictional resistance and there was no significant difference between beta-titanium and nickel-titanium except at 2000 g·mm moment in wet conditions. Frictional resistance of all wires increased as the moment increased from 1000 g·mm to 2000 g·mm. Under wet conditions, the frictional resistance of stainless steel wires increased in both 1000 g·mm and 2000 g·mm moment conditions, but frictional resistance of nickel-titanium and beta-titanium increased only in 2000 g·mm conditions. Conclusion: These results indicated that various conditions influence on frictional resistance. Therefore, laboratory studies of frictional resistance should simulate clinical situation.

Cellulase 생산 야생효모의 선별 및 세포외 Cellulase 생산

문정수, 박경서, 김혜원, 김수진, 이종수 배재대학교 자연과학연구소 2016 自然科學論文集 Vol.33 No.1

교정용 미니 임플랜트 고정원과 SWA en masse sliding retraction 시 전치부 치축 조절 요인에 관한 유한요소해석

정혜심,성상진,문윤식,조영수,임승민 대한치과교정학회 2006 대한치과교정학회지 Vol.36 No.5

교정용 미니 임플랜트 고정원을 이용한 교정 치료가 보편화되며, SWA와 이를 이용한 en masse sliding retraction은 임상에서 흔히 사용하는 치료법이 되었다. 그러나 고정원을 성공적으로 보존하려는 노력에 비해, 발치 공간 폐쇄 시 전치부 치축 조절에 관여하는 요인에 대한 보고는 아직까지 부족한 실정이다. 본 연구에서는 제1소구치를 제거한 상악 치아와 치주 인대 그리고 치조골에 대한 3차원 유한요소 기준모델을 제작하였고, 제1대구치와 제2소구치 사이 주호선 10 mm 상방에 식립된 교정용 미니 임플랜트를 고정원으로 사용할 경우, 측절치-견치 사이의 견인 훅의 높이를 변화시키며 후상방 견인력을 가하거나, 주호선에 보상 만곡을 부여하는 것이 전치부 치축 조절에 어떤 영향을 미치는지 시뮬레이션 하였다. 또한 전치부 치축이 설측 경사된 모델을 같은 실험 조건으로 시뮬레이션 하여 발치 공간 폐쇄 시 설측 경사된 전치부 치축을 유지하거나 개선할 수 있는 요인을 검토하였고, 다음과 같은 연구 결과를 얻었다. 2 mm 높이의 견인 훅에 대하여 후상방으로 견인력을 가할 경우 발생하는 함입력으로 인하여 전치부 설측 경사가 더 감소되지는 않았다. 견인 훅의 높이가 5 mm인 경우 후상방 견인력을 가하면, 측절치의 치관 순측 및 치근 설측 이동이 일어나고, 견치의 비조절성 후방 경사 이동이 심화되었다. 4 mm의 보상 만곡은 측절치의 치관 순측 및 치근 설측 이동을 일으키고, 견치의 비조절성 후방 경사 이동을 감소시켰다. 또한 전치부가 설측 경사된 모델을 기준모델과 같은 실험 조건으로 시뮬레이션 한 경우 치근면의 응력 분포와 25000배 확대된 그래프 상에서의 치아 이동 양상은 매우 유사하였다. 이상의 결과는 미니 임플랜트-SWA sliding 생역학을 구사 시 견인 훅의 위치와 와이어 상의 보상 만곡의 유무에 의해 전치부의 치축 조절이 달라지며 실제 임상에서 가이드라인으로 활용될 수 있을 것이다. Objective: With development of the skeletal anchorage system, orthodontic mini-implant (OMI) assisted en masse sliding retraction has become part of general orthodontic treatment. But compared to the emphasis on successful anchorage preparation, the control of anterior teeth axis has not been emphasized enough. Methods: A 3-D finite element Base model of maxillary dental arch and a Lingual tipping model with lingually inclined anterior teeth were constructed. To evaluate factors influencing the axis of anterior teeth when OMI was used as anchorage, models were simulated with 2 mm or 5 mm retraction hooks and/or by the addition of 4 mm of compensating curve (CC) on the main archwire. The stress distribution on the roots and a 25000 times enlarged axis graph were evaluated. Results: Intrusive component of retraction force directed postero-superiorly from the 2 mm height hook did not reduce the lingual tipping of anterior teeth. When hook height was increased to 5 mm, lateral incisor showed crown-labial and root-lingual torque and uncontrolled tipping of the canine was increased. 4 mm of CC added to the main archwire also induced crown-labial and root-lingual torque of the lateral incisor but uncontrolled tipping of the canine was decreased. Lingual tipping model showed very similar results compared with the Base model. Conclusion: The results of this study showed that height of the hook and compensating curve on the main archwire can influence the axis of anterior teeth. These data can be used as guidelines for clinical application.