Pd 촉매하에서 allylic alcohol과 hypervalent iodine 화합물의 위치 선택적 vinylation에 관한 연구

강석구,이홍우,장수범,김태현,편성재 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2

The formation of carbon-carbon bond by palladium-catalyzed coupling of aryl or vinyl halides with olefins, known as the Heck reaction, has become a powerful tool in organic chemistry. In the case of allylic alcohols, palladium-catalyzed reaction of organic halides usually affords β-substituted ketones or aldehydes rether than β-substituted allylic alcohols.

수화동영상 전송 시스템의 개발 및 구현

강석훈,김열광,박수현 東西大學校 1999 동서논문집 Vol.5 No.-

본 논문에서는 JAVA를 이용한 수화 동영상 전송 시스템을 설계및 구현한다. 일반적인 형식의 동영상 전송기법은 서버 측의 동영상 데이터가 사용자에게 노출될수 있거나 고가의 인코더를 이용해야 하는 등 보안과 유지에 적지 않은 문제점을 가지고 있다. 본 논문에서 구현하는 시스템은 100% 순수 JAVA로 구현되어, JAVA환경만 갖추어져 있으면 일반 Web Browser 로도 데이터의 전송이 가능하며, 서버측의 멀티미디어 데이터 파일이 사용자로부터 보호될수 있는 특징을 가지고 있다. 따라서 이 시스템은 수화를 비롯한 각종 멀티미디어 교육 시스템에서 데이터 전송 모듈로 적합하며 손쉽게 다른 서버 시스템으로 이식이 가능하다.

해운대 달맞이 언덕에 있어서 바다조망경관의 역사적 변천에 관한 연구

강영조,신수안,조미나,이현주,박은희 동아대학교 건설기술연구소 2000 硏究報告 Vol.24 No.1

The purpose of this study is to clarify the historic transition of the prospects on Haeundae dalmaji hill. Dalmaji hill is well known for a character of configuration on the ground with the scene of the sea. We will infer that how did it change the prospects of Dalmaji hill's sea through the analyzing of the preset situation and location of building on the hill. (1) We investigated the stories of the building, the history, the business condition. (2) We collect the twenty four view points which is able to have seascape on the hill, being easily approaching to the road, and condition of changing the building. (3) We clarified the transition of seascape prospect and considered the characteristics of the six types from which were divided the condition of seascape prospect.

자연언어를 이용한 질의응답시스템의 문맥처리부 설계 : 생략, 대용 및 화제처리를 중심으로

강석훈,박수현 東西大學校 1997 동서논문집 Vol.3 No.1

본 논문에서는 자연언어를 이용한 질의응답 시스템에서 사용자의 입력문에 따라 시스템이 능동적으로 응답할 수 있도록 문장을 처리할 수 있는 모듈 가운데 문맥처리부를 설계한다. 질의응답 시스템이 사용자의 입력문에 응답하려면 먼저 입력문을 분석할 수 있어야 하며, 이를 위해서는 기존의 언어해석 뿐만 아니라 문장간의 해석이 필요하다. 따라서 본 논문에서는 이를 위해 생략, 대용 및 화제처리를 중심으로 문맥에 대한 처리를 논하고자 한다.

Cyclic Loading Test of Structural Walls with Small Openings

Hyun-Jin Yu,Su-Min Kang,Hong-Gun Park,정란 한국콘크리트학회 2019 International Journal of Concrete Structures and M Vol.13 No.6

This study aimed to investigate the effects of small openings on the structural performance of reinforced-concrete(RC) structural walls. Cyclic lateral loading tests were conducted on five RC walls with an aspect ratio of 2.6 and small openings. The main test parameter was the size of the small openings. The specimens were designed to fail after flexural yielding, considering the typical failure mode of slender RC walls. The structural performances of the test specimens were analyzed based on the test results in terms of the load-carrying capacity (flexural strength), hysteretic behavior, strain distribution, and the size of the openings. The specimens showed flexural yielding regardless of the size of the openings, and the flexural strength and deformation capacity were not significantly affected by the small openings. This result indicates that small openings do not affect the flexural behavior of slender walls if the walls have sufficient shear resistance and the small openings are located away from the extreme compressive end and in the compression zone where compressive stress does not decrease.

IC(Integrated Circuit) Card를 이용한 체력진단 및 평가시스템 구축에 관한 연구

강현중,왕종수 瑞逸大學 1999 論文集 Vol.17 No.-

남자대학생의 흡연태도와 행동에 관한 연구

강경진,김정미,민혜영,안소진,오경숙,은경희,이현,이희선,홍주미,김수지 이화여자대학교 간호과학대학 2003 이화간호학회지 Vol.- No.37

There have been so many researches about problems of cigarettes and relation of smoking and heath since 1950's and generally known that smoking is one of the worst factor of increasing disease and mortality. No matter what such many proofs about various problems of smoking have been researched, smoking rate of current male collage students has not been decreased. Besides, most of the researches about cigarette use and its addiction have been focused on the adolescent or adult women smokers or adult male, not male collage student. Therefore, the subject of this study is about smoking attitude and smoking behavior of male collage students by general features. Smoking attitude was analyzed by modifying 'Guidelines for the content of tobacco smoking surveys of the general population'(WHO, 1982). Two hundred of male collage students participated to the distributed questionnaire for one week in May. The smoking attitude was categorized into duration of smoking and number of cigarette per day(CPD), and nicotine dependency, investigated by Fagerstrom Tolerance Questionnaire(FTQ) (Fagerstorm & Schneider, 1989). All statistics were performed by procedure of SAS according to number, percentage, mean, standard deviation, and ANOVA. The results are as follows: 1. Smoking attitude level was mean 25.73±5.15 marks, ranging from 13 to 39 marks of the total 40 marks. 2. Duration of cigarettes, number of cigarette per day, and nicotine dependency were mean 5.14±2.84 years, 12.88±6.85 pieces, and 4.78±1.69, respectively. 3. Smoking attitude showed significance according to general features such as marital state and allowance, but the significance according to marital state is not valuable because the numerical difference is so big between married one and single that they cannot be compared with each other. 4. Duration of smoking was significant according to general features such as age and allowance. 5. Smoking amount showed significance the factors of age only. 6. ll1ere was no significance in nicotine dependency according to general features. As a result, smoking attitude of male collage student in this study shows moderate level. Smoking attitude and duration is significant according to allowance, and smoking amount is significant according to age. Nicotine dependency according to general features is not significant but comparing with the preceding study about adult male, male collage students in this study are respectively more nicotine-dependent than adult male smokers. In conclusion, the right allowance usage strategies and effective heath education focused on the young are needed. In addition, helpful programs and information spreading strategies are necessary for establishing higher level of smoking attitude. At last, systemic regulations in daily living for ""anti-nico-dependent"" and perspective reforming of male university student are needed for reducing nicotine dependency.

용해성 poly(dimethy-co-diphenylsilane)공중합체의 특성과 열분해에 관한 연구

강필현,양현수,황택성,김봉만,권오현 忠南大學校 産業技術硏究所 1993 산업기술연구논문집 Vol.8 No.2

Soluble poly(dimethyl-co-diphenylsilane)copolymer,[(SiMe₂)x(SiPh₂)1-x]n where x=0.5 to 0.9., was synthesized by condensation polymerization of dimethyldichlorosilane and diphenyldichlorosilane in xylene. In the TG analysis of the copolymer, weight loss started at 170℃ and the weight residue at 1000℃ was 32%. The copolymer was stabilized by thermal oxidation at 80 to 110℃ for 5 hr. in air, and its thermal stability increased as the temperature increased. The copolymer heat treated above 700℃ showed no organic bonds of C-H and Si-CH₃. while Si-C, and Si-O large bonds were observed. Amorphous SiC was obtained by pyrolysis at 1000℃ and β-SiC at 1200 to 1400℃, in which a better crystallinity of β-SiC was observed at a higher temperature.

백서의 하악골 전방 재위치 시 하악과두 조직에서의 nitric oxide synthases 발현 양상

김현숙,김호영,허성수,강경화,김상철 대한치과교정학회 2010 대한치과교정학회지 Vol.40 No.4

Objective: The aim of this study was to identify the expression of nitric oxide synthases (NOS) in the mandibular condyle during mandible advancement by functional appliance and to correlate it with the histologic changes and bone remodeling. Methods: Twenty-four female, 35-day-old Sprague-Dawley rats were randomly divided into 3 experimental groups. In all experimental groups, the mandibles of the rats were kept in a continuous forward position with a fixed bite jumping appliance. The rats were sacrificed on the 3rd, 14th, and 30th days of experiment. More than 2 rats in each group were used for staining. Results: There were no remarkable histologic changes and NOS expression differences in the control group. The most prominent histologic changes occurred in the 14th day experimental group. NOS decreased in the 30th day experimental group. There was increased expression of NOS₂ and NOS₃ in all experimental groups, comparative to the control group. In all the experimental groups and control group, the expression of NOS₂ was greater than that of NOS₃. Conclusions: It is postulated that NOS₂ and NOS₃ in the mandibular condyle might play an important role in bone remodelling of the mandibular condyle. 성장기 아동의 하악과두 조직에서의 골개조 과정은 연골세포, 조골세포, 파골세포가 연관되며 nitric oxide synthase (NOS)가 중요한 매개자의 하나로 작용할 것으로 생각되나 기능성 악정형술을 이용해 하악골을 전방유도시켰을 때 하악과두에서의 골개조와 NOS 의 발현에 대해서는 아직 자세히 연구되어 있지 않다. 본 연구는 하악골을 기능적으로 전방위치시켰을 때 하악과두 조직의 조직학적 변화양상에 대해 살펴보고 NOS 의 발현 정도를 조사하여 상관관계를 알아보고자 하였다 . 35일령의 24마리의 Sprague-Dawley 백서를 3군으로 나누었고 각 군에 있어서 5 마리는 실험군으로 3마리는 대조군으로 나누었다. 실험군은 하악골 전방유도장치를 24시간 장착한 후 3, 14, 30 일에 희생하였으며 시상면에 평행하게 절단하였고 NOS₂와 NOS₃의 조직면역염색을 통해 다음과 같은 결과를 얻었다. 대조군 간에는 조직학적인 변화와 NOS 의 발현 번화가 뚜렷이 관잘되지는 않았으며 실험기간에 따른 조직학적 변화는 실험 14일 군에서 가장 많은 신생골 형성과 조골세포 활성을 보였으며, 실험 30 일 군에서는 감소하는 양상으로 나타났다. 또한 모든 실험군에서 대조군에 비해 NOS₂와 NOS₃의 발현이 많이 나타났으며 실험기간에 따른 비교 시 NOS₂와 NOS₃의 발현은 실험 14 일 군에서 가장 많이 나타났으며 실힘 30 일 군에서는 감소하는 양상으로 나타났다. 전체 실험군과 대조군에서 NOS₂의 발현은 NOS₃의 발현보다 많이 나타났고 NOS₂는 실험군 과두의 비대연골, 연골하골에서 주로 발현되었다. NOS₃는 실험군 과두의 골수와 모세혈관에서 주로 발현되었다. 따라서 하악과두 내의 NOS₂와 발현조절이 하악과두 조직의 골개조에 관여함을 시사한다.

간호대학생들의 대인가치관과 가치관변화에 대한 연구

이강오,장수현,나덕미 朝鮮大學校 附設 醫學硏究所 1989 The Medical Journal of Chosun University Vol.14 No.1

The purpose of this study is to determine interpersonal values and value change of the four year course nursing students. The survey was conducted against 217 students of a department of nursing, from all classes (freshman, sophomore, junior and senior). This study was conducted during the period of 7th through 15th of march 1987 in accordance with the Lee Kyung-Hye and Hawang Eung-Yun's "Survey of Interpersonal Values (STV)." The results of the study were as follows: 1. Those nursing students surveyed show that conformity (18.32) took the highest place and leadership (8.64) lowest in the general value orieUtaiton. In accordance with the Lee and Hwang's SIV, those of other woman college students indicate 32~63% tile, respectively. 2. Changes in values by class were significant difference. (P<.05) Accordingly, the hypothesis 1 of this study has been supported. 3. Significant variation has been shown by each class in each factor such as conformity and leadership but no variation has been indicated in benevolence, independence, support and recognition. 4. There was significant difference in values between higher class (junior and senior) students with clinical experience and starting class (freshman and sophomore) students without clinical experience. (P<.05) The study indicates the values of higher class students is lower than that of starting class students. Therefore, the hypothesis 2 of this study has been supported. 5. There was no significant difference in values between entering students and graduating students. (P>.05) Thus, the hypothesis 3 of this study has been rejected. The results of the study show that there is no positive influence curricuium and clinical practice in forming the value for the students. Thcrefore, it is concluded that new strategy of clinical practice and special education program should be established for fromation of the right values for the nursing students.