고온에서 HAN 계열 추진제 액적의 거동에 대한 연구

황창환(Chang Hwan Hwang),백승욱(Seung Wook Baek),한조영(Cho Young Han),김수겸(Su Kyum Kim),전형열(Hyung Yeol Jeon) 한국연소학회 2012 KOSCOSYMPOSIUM논문집 Vol.- No.45

The droplet behavior of 83.9 wt.% HAN water solution was investigated experimentally with various ambient temperature and nitrogen environment. At the initial stage of evaporation under thermal decomposition temperature of HAN, gradual decreasing of droplet diameter was observed. After that, the droplet started to expand due to the internal pressure build up by water nucleation inside the droplet. The micro explosion was observed at higher temperature than the decomposition temperature of HAN and the remaining droplet showed similar behavior of single composition droplet. The decreasing rate was augmented as the ambient temperature increasing.

Factors associated with the risk of colorectal neoplasia in young adults under age 40

Ilsoo Kim,Han Hee Lee,Young Jae Ko,Ho Eun Chang,Dae Young Cheung,Bo-In Lee,Young-Seok Cho,Jin Il Kim,Myung-Gyu Choi 대한내과학회 2022 The Korean Journal of Internal Medicine Vol.37 No.5

Background/Aims: Recent epidemiologic studies have shown a continued increase in colorectal cancer incidence among younger adults. Little is known about the factors that contribute to the development of young-onset colorectal neoplasia (CRN). Methods: A cross-sectional analysis was performed for individuals younger than 40 years who underwent colonoscopy in Seoul St. Mary’s Hospital and its affiliated health screening center. High-risk CRN was defined as adenoma or sessile serrated lesion ≥ 10 mm, with three or more adenomas, villous histology, high grade dysplasia, or carcinoma. Results: Of these 13,621 included participants, 2,023 (14.9%) had one and more CRN. Young patients with CRN tended to be elderly, male, obese, smoker, having a habit of drinking, and having comorbidities such as hypertension, dyslipidemia, diabetes, and chronic kidney disease. In a multivariate analysis adjusted for age, sex, obesity, smoking status, and alcohol intake, old age (odds ratio [OR], 1.086; 95% confidence interval [CI], 1.054 to 1.119), male sex (OR, 1.748; 95% CI, 1.247 to 2.451), obesity (OR, 1.439; 95% CI, 1.133 to 1.828), and smoking (OR, 1.654; 95% CI, 1.287 to 2.127) were independent risk factors for overall CRN. Obesity and smoking as two modifiable factors increased the risk for high-risk CRN even more than for overall CRN (OR, 1.734; 95% CI, 1.168 to 2.575 and OR, 1.797; 95% CI, 1.172 to 2.753, respectively). Conclusions: Obesity and smoking were modifiable risk factors for CRN in young adults. They increased the risk for highrisk CRN even more than for overall CRN. A colonoscopy might be beneficial for young individuals with these factors.

반말체 어미 ‘-게’의 의미기능 연구

이한민 ( Lee Han-min ),조은영 ( Cho Eun-young ) 국어학회 2015 국어학 Vol.74 No.-

본고는 조은영·이한민(2011)에서 정리하였던 연결어미에서 종결어미화된 ‘-게’의 의미기능과 문법화 과정의 연장선상에서 추가적인 ‘-게’의 용법으로 [가정]과 [추측유도]의 의미기능을 살피고자 하였다. [가정] ‘-게’구문은 조건절인 선행절과 결과절인 후행‘-게’절로 구성되며, 선행절의 부정을 이끄는 반어적 진술의 수사의문문으로 사용된다. [가정] ‘-게’는 선어말어미 ‘-었-’이 결합할 수 있는 점, 후행 ‘-게’절이 단독으로 쓰일 수 없는 점, 의미적으로 후행절의 내용이 선행절을 강조하는 기능을 한다는 점에서 [완료결과] ‘-게’와 연관성을 보인다. [추측유도] ‘-게’구문은 화자가 알고 있는 어떠한 사실에 대하여 청자의 ‘추측을 유도’하는 발화에서 사용되며, 설명의문문 형식이나 선택의문문 형식으로 쓰이지만, 청자로부터 신정보를 얻기 위한 질문으로는 사용되지 않는다. [추측유도] ‘-게’절은 선어말어미 ‘-었-’이 결합할 수 있는 점, 이미 이루어진 상황 혹은 확정된 사실에 대한 것이라는 점에서 [완료결과] ‘-게’와 유사한 의미를 보인다. 그러나 단독으로 사용될 수 있는 구문인지, 발화의 초점이 ‘-게’절에 있는지의 여부에서 차이를 보인다. [가정]은 [완료결과]와 통사적, 의미적으로 비슷한 부분이 많고, [완료결과]와 동일한 형식의 문장이 [가정]의 쓰임을 보이는 과도기적 형태도 존재한다. 따라서 [가정]은 [완료결과] 이후에 연결될 수 있는 단계로 볼 수 있다.[추측유도]의 경우에는 [완료결과], [가정]과 통사적, 의미적으로 공통적인 부분이 있지만, 조은영·이한민(2011)에서 정리한 종결어미 ‘-게’의 단계별 의미기능과 함께 다룰 수 있을지에 대해서는 결론을 내리지 못하였다. [추측유도]가 연결어미 ‘-게’에서 문법화한 종결어미가 아니라 다른 기원을 갖는 ‘-게’의 의미기능일 수도 있다는 가능성도 열어 두어야 할 것이다. 다만, [추측유도] ‘-게’가 공시적인 쓰임에서 연결어미 ‘-게’에서 문법화한 종결어미의 의미기능들과 연관성을 가지는 것은 분명하다. This paper tries to figure out the additory usage of final ending ‘-ge’―the semantic function of [supposition] and [assumption inducement]― as an extension to the grammaticalization process of final ending ‘-ge,’ originated from a connective ending ‘-ge’ organized by Cho, Eun-Young & Lee, Han-Min (2011). The sentence structure of [supposition] ‘-ge’ is consisted of the antecedent clause, which is a conditional clause, and the following clause ‘-ge’ clause, and is used as a rhetorical interrogative of an ironic statement denying the antecedent clause. It also shows some correlation with [completion result] ‘-ge’, considering the fact that ‘-ge’ can be combined with the tense prefinal ending ‘-eoss-’, and that following ‘-ge’ clause cannot be used by itself, and that the following clause can emphasize the antecedent clause semantically. The sentence structure of [assumption inducement] ‘-ge’ is often used when inducing a listener to make an assumption of a matter that a speaker already knows. However, it is not used as a question to get a new information from the listener although it may be used in a form of a wh-question or an alternative question. [Assumption inducement] ‘-ge’ clause shows some similar meaning with that of a [completion result] ‘-ge’ clause regarding the fact that it can be combined with the tense prefinal ending ‘-eoss-’ and that this clause is about something that has already happened or determined. However, it shows some differences in that whether this sentence structure can be used alone or its focus point of utterance is on ‘-ge’ clause itself. There exists several similarities between [supposition] and [completion result] in syntactic and semantic context, in addition to a transitional phase in which a sentence is used as a [supposition] clause when sentence structures exhibit identical features to [completion result]. Thus, it can be seen that [supposition] is a connecting stage following the [completion stage]. In case of [assumption inducement], there exists several similarities between [assumption inducement], [completion result] and [supposition] in syntactic and semantic context. However, the authors were not able to draw a definitive conclusion as to whether [assumption inducement] can be dealt with changing meanings of semantic functions of final ending ‘-ge,’ organized in Cho, Eun-Young & Lee, Han-Min (2011). Thus, there is an implied possibility that [Assumption inducement] may not be a grammaticalized final ending ‘-ge’ but that of different origins with dissimilar semantic functions. In the synchronic use, however, it is certain that [assumption result] ‘-ge’ has a definitive correlation with semantic functions of final endings that are grammaticalized in the connective ending ‘-ge.’

일 대학병원에 입원한 노년기 양극성 장애 환자의 인구학적 및 임상적 특징

조숙현(Sook Hyun Cho),정한용(Han Yong Jung),권영준(Young Jun Kwon),이소영(So Young Lee),김양래(Yang Rae Kim),김윤정(Yun Jung Kim) 대한노인정신의학회 2006 노인정신의학 Vol.10 No.2

Objectives : As the elderly population is continuing to increase, psychiatric diseases of the elderly are becoming an important social issue. This study looks into the demographical and clinical features of the elderly patients diagnosed with bipolar disorder in a University hospital. Methods : The study subjects include patients admissioned in the closed wards of Soonchunhyang Seoul hospital and Cheonan hospital from March, 2000 to February, 2005 who met the DSM-IV-TR criteria for bipolar disorder at the time of discharge. A total of 146 patients (76 men, 70 women) medical records were studied retrospectively. Subjects older than the age of 50 at time of admission were grouped as the old age group, whereas those who were younger than 50 as the young age group. Also among the old age group, those who had the first onset of episode under the age of 50 were grouped as the early onset group, whereas those who had the first onset after the age 50 were grouped as the late onset group. Results : The number of bipolar disorder patients in the young age group and old age group were 73 and 73 respectively. The number of early onset group and late onset group were 46 and 23 respectively. The old age group had a relatively higher incidence of bipolar II disorder than the young age group. Also in the old age group there was a higher incidence of hypomanic or depressive episode rather than manic episode compared to the young age group. And in the old age group psychotic symptoms were less common and the mean admission length shorter than the young age group. Additionally in the old age group treatment with Lithium monotherapy or with no mood stabilizers at all were relatively common. Among the old age group, late onset group had a higher rate of bipolar II disorder than the early onset group. Conclusion : This study shows differences in the demographical and clinical features among different age groups. But additional research would be required to determine whether the bipolar disorders in the elderly or late onset group are actually a different type of disorder from those of the young.

야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로

조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.

만선신부전 환자에서 관상동맥조영술 소견에 관한 연구

한대희,김성구,박상호,김성한,조원영,방덕원,조윤행,정의룡,은영근,권영구 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Background : Patients with chronic renal fialure have a substantially elevated risk of death from cardiovascular diseases than do the general population. the patients with chronic renal failure are at significantly increased freqeuncy of hypertension, hyperlipidemia, and diabetes mellitus which are known to the risk factors of the coronary artery diseases, and the prevalence of the coronary artery diseases in chronic renal failure patients is highly associated with the hemodynamic disorder and metabolic abnormalities. therefore we expected that the coronary angiographic findings in patients with chronic renal failure should be different from the general population (control groups) and investigated the risk factors contributing to coronary artery diseases. Method : we have retrospectively compared the coronary angiographic findings of 44 patients with chronic renal failure on hemodialysis with that of 88 patients in the general population and investigated the factors contributing to the development and acceleration of coronary artery diseases in patients with chronic renal failure Result : Hypertension and diabetes mellitus which is risk factors for coronary artery disease is significantly increased in patients with chronic renal failure, in coronary angiographic finding the severity of the lesion is worse. the incidence of PCI or CABG of patients with chronic renal failure is more than that of control group but statistically no difference between patients with chronic renal failure and control group. the sex, the duration of disease, the duration of dialysis, serum creatinine in patients with chronic renal failure have no correlation to the prevalence of coronary artery disease and severity of lesion. hyperglycemic patients with chronic renal failure have high incidence of coronary artery disease and are worse in the severity of lesion Conclusions : There is significantly increased the pevalence and severity of involving multiple coronary artery diseses in hyperglycemic patients with CRF.

Analysis and Evaluation of Capillary Passive Valves in Microfluidic Systems Using a Centrifugal Force

Cho, Han-Sang,Kim, Ho-Young,Kang, Ji-Yoon,Kwak, Seung-Min,Kim, Tae-Song The Korean Institute of Electrical Engineers 2004 KIEE International Transactions on Electrophysics Vol.4C No.4

This work reports the theoretical and experimental investigations of capillary bust valves to regulate liquid flow in microchannels. The theoretical analysis uses the Young-Laplace equation and geometrical considerations to predict the pressure at the edge of the valve opening. Numerical simulations are employed to calculate the meniscus shape evolution while the interface is pinned at the valve edge. Microchannels and valves are fabricated using soft lithography. A wafer-rotating system, which can adjust the driving pressure by rotational speed, induces a liquid flow. Experimentally measured valve-bursting pressure agrees with theoretical predictions.

Formulation Prediction for Young's Modulus of Poly(dimethylsiloxane) by Spectroscopic Methods

Cho Han Saem,Moon Heh‐Young,Lee Heung Soon,Kim Yong Tae,Jeoung Sae Chae 대한화학회 2021 Bulletin of the Korean Chemical Society Vol.42 No.9

In this work, we refer to the fraction of hydrides and vinyl groups consumed in cross-linking reaction as a variation of the properties of poly(dimethylsiloxane) (PDMS) with varying the formulation of a curing agent from 3.2 wt % to 50 wt %. Young’s modulus, density, and refractive indices of PDMS were observed to have a maxima at a formulation of about 10 wt % of cross linker. The intensity of the Raman band for the Si H stretching mode in cross-linker is almost zero if the cross-linking agent is less than 10 wt %, but it is linearly increasing with increasing the content of cross-linker. The dependence of the elastic modulus on the formulation could be explained in terms of the fraction of cross-linked network. The analytical framework proposed in this work could be used for optimizing the formulation of PDMS and hence its properties can be tailored for specific applications.

운동 종료 후의 당질·단백질·지질의 혼합물 섭취가 근 글리코겐 회복에 미치는 효과

육조영,송영주,류기성,장창현,김한수,김대경 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

In this study 8 male athletes and 8 female athletes for matches requiring endurance were examined for the purpose of comparison and analysis on the effect of absorption of sugars and effect of absorption of sugars+protein+fats restoration of muscular glycogen after elapse of 4 hours subsequent to closing 90 minutes exercise. (Amount of energy absorbed was same). Examinees were tested with 3 kinds of performance such as CPF Performance whereby they were made to take ① sugars (0.75 g/㎏) and protein (0.1g/㎏) and fats (0.02 g/㎏) after elapse of 1 hour subsequent to long hours of exercise and CHO Performance whereby examines were made to take ② sugars (1g/㎏) alone and Performance whereby they were made to take ③ placebo (which does not contain any sugars, protein or fats). Also the examinees took meals which had same amount of energy and nitrogen during the Performance on the date prior to experiment or on the date of experiment. Women during the exercise showed significantly higher rate of oxidation of fats, basic element of energy than that of men. In CHO Performance and CPF Performance value of blood sugar and density of insulin were significantly higher in comparison with performance with placebo. At such cases there was no difference between different genders. Same kind of phenomena were confirmed with restoration of muscular glycogen. From such fact it could be observed that absorption of fats alone and absorption of sugars+protein+fats in comparison with absorption of placebo after exercise promoted relatively higher level of restoration of muscular glycogen for both men and women.

초·중·고등학교 학생, 학부모, 일반교사의 보건교육 요구

윤순녕,김영임,최정명,조희순,김영희,박영남,오경순,이분옥,조선녀,조소영,한선희,하영미 韓國學校保健學會 2004 韓國學校保健學會誌 Vol.17 No.2

Purpose : The purpose of this study was to identify needs of health education of the students, parents, general teachers, and health teacher of the elementary, middle, and high schools. Method : 279 schools of elementary, middle, and high school were sampled nonproportionally during the period from June 28 to July 26, 2004 . The data were collected by the questionnaire from 1,888 students, 1,876 parents, 1,695 general teachers, 279 health teachers. A frequency, % and χ2-test were used to analysis by SAS program. Result : 1. It showed that 98.1% of elementary school students, 92.3% of middle school students, 89.6% of high school students answered that they need health education. The most of students, parents, and general teachers had high interests in health education. 2. In the case of students, main causes of needs of health education was 'to prevent diseases or accidents''. But parents answered that it was 'to build up a healthier behavior'. General teachers answered that it was 'more effective systematic and continuous health education'. 3. Over 80% of students, parents, and general teachers about the question of who qualified person is to teach health education as a regular class responded that health teacher is available. Especially 93% of elementary school students answered like that. 4. The most of students, parents, and general teachers answered that health education in the classroom is favorable 1 to 2 hours per week. Conclusion : As results of the study , the majority of students, parents, general teachers agreed needs of health education. Therefore, on the basis of this study, systematic and continuous health education is necessary. Additionally the establishment of independent health subject is required certainly.