저수축형 폴리머 콘크리트의 제조 및 물리·역학적 특성

연규석,이윤수,최동순,정경현,황진하 강원대학교 부설 석재복합신소재 제품연구센터 2000 석재연 논문집 Vol.5 No.-

본 연구에서는 폴리머 콘크리트의 수축저감을 목적으로 수지량, 수축저감제함량과 S/a 비등을 변화시켜 경화수축의 변화와 강도 특성을 실험적으로 구명하였다. 경화수축량은 수치량이 105%일 때 보다 11.5%일 때, 즉 수지량이 증가할수록 커짐을 알 수 있었다. 수축저감제의 첨가에 따른 경화수축량은 감소함을 알 수 있었다. B10.5-SR10일 경우 수축저감제가 첨가되지 않았을 때 보다 약 30%, B10.5-SR20 일 경우 약 53%, B11.5-SR10일 경우 약 31%, B11.5-SR20 일 경우 약 47% 정도의 수축저감의 효과를 볼 수 있었다. S/a 비에 따른 경화 수축챨ㅇ은 S/a 60일 때 가장 적은 값을 보였으며, S/a 50, S/a 40 일때는 S/a60 일 때 가장 적은 값을 보였으며, S/a 50, S/a 40일 때는 S/a 60일 때 보다 각각 10%, 30% 정도 수축량이 증가함을 알 수 있었다. 압축 및 휨 강도특성은 수지량이 증가할수록 높아지고, 수축저감제의 첨가량이 증가할수록 낮아짐을 알 수 있었다. S/a 비에 따른 강도 특성은 압축강도와 휨강도 모두 S/a 비가 60일 때 가장 큰 값을 보였으며, S/a 비가 50,40 순으로 감소하였다. Many different polymer based concrete materials are known today, but the large setting or hardening shrinkage of polymer concrete is a problem to overcome in their practical applications. The setting shrinkage reaches about five to ten times the drying shrinkage of ordinary cement concrete, i.e, 50 to 60 ×10^4. This paper deals with a reduction in the hardening shrinkage of unsaturated polyester resin concrete which is treated with respect to shrinkage-reducing agent content, S/a ratio and catalyst content, and tested for length change during hardening, and flexural and compressive strengths. It is shown that the change of shrinkage-reducing agent content and S/a ration the length change of the unsaturated polyester resin concrete during hardening.

주상복합아파트 커뮤니티시설의 쾌적성에 관한 연구

노이경;황연숙 한양대학교 2007 韓國 生活 科學 硏究 Vol.27 No.2

The objective of this study was to valuate the amenity of community facility in Complex Apartment. This study was conducted questionnaire survey. The subject of the case studies were the 6 Complex Apartments in Seoul and Gyeonggi-do built in 2000 and after, and the subject of the questionnaire was surveyed to the 212 residents who have been living in these apartments for longer than 6 months. The frequency, percentage, mean, One-way ANOVA and Duncan tests were executed through SPSS for Win 12.0 statistics package program. The types of amenity of community facility in Complex Apartments were consisted of physical aspect, spatial aspect, psychological aspect. The amenity of community facility showed high in general. Psychological aspect showed higher satisfaction of amenity level, which was followed by spatial aspect, physical aspect.

무선 인터넷 환경에서 XML 서명 기법을 이용한 전자서명 시스템

문경원,황병연 가톨릭대학교 자연과학연구소 2004 자연과학논문집 Vol.25 No.-

무선 인터넷 환경의 급속한 발전으로 인해 무선 단말기를 이용한 전자상거래(M-Commerce)가 활성화되고 있다. 유선에서 이루어지는 전자상거래에서 데이터의 보안이나 사용자 신원 확인 같은 인증이 무선에서도 중요한 기술로 인식되고 있기 때문에 무선 인터넷 환경에서의 WPKI(Wireless Public Key Infrastructure)나 유선 인터넷 환경에서의 XML 전자서명 같은 연구가 활발히 진행되고 있다. XML 전자서명은 XML 문서를 이용하는 전자상거래 분야에 사용되어 전자서명 시스템간의 상호 연동성을 높일 수 있다. 본 논문에서는 기존의 유선 인터넷 환경에서 사용되고 있는 XML 전자서명 기법을 무선 인터넷 환경에 적용하여 XML 문서 및 전자서명 시스템들간의 상호운용을 가능하게 하는 시스템을 제안한다.

지역적 특성을 고려한 보육시설모형에 관한 연구

최경순,황연숙,정지영 신라대학교 자연과학연구소 1999 自然科學論文集 Vol.6 No.-

This study aims to grasp the present condition of nurseries, to investigate and analyse case studies, to suggest standards and reform measures, and based on these, to produce basic information for the formation of an architectural spatial model. Data were collected through questionnaire survey including observations and interviews. The sample consisted of 82 Child Care Centers. The data were analized by using SPSS-PC program. The major findings were as follows : (1) The facility and equipments in the child care centers were insufficient for children's development. (2) Most of child care centers are not in the desirable Interior environment. To enhance the quality of child care centers, the physical interior environment of child care centers should be influence on the development of child. (3) Functional spaces should be organized to support the child' behavior. Multi-purposed room should be provide to encourage and adapt to variety of large-muscle activities. (4) Interior findings looks too monotonous and do not have characteristics. Natural materials, various colors and patterns are recommendable. Furniture should be designed to meet the functions of flexibility, mobility, and security.

민들레 추출액 농도에 따른 민들레 코팅쌀밥의 품질에 관한 연구

유경미,이연경,김세희,황인경,이부용,김성수,홍희도,김영찬 한국조리과학회 2005 한국식품조리과학회지 Vol.21 No.1

Washed rice was coated by spraying aqueous dandelion (Taraxacum officinale) extracts at 20, 30, 40 'Brix and dried at room temperature. The coating procedure was conducted 5 mL/min for 10min. Property changes in the dandelion coated rice and un-coated cooked rice were observed during 2 days of storage. Increasing the coating concentration was associated with lower color values (L, a value) and moisture contents. Sensory and texture properties generally decreased in the cooked rice coated with dandelion more than the control (non-coated rice). But, D-20(20 °Brix of the dandelion concentration) resulted in better textural properties and s ensnry scores for hardness and overall acceptability in cooked rice. Compared to the control, the washed rice roated with 20 °Brix for 0 and 2 days showed better quality in sensory activities, a lower gel consistency and better textural activities. It was concluded that the optimum coating ration of rice and added dandelion extract for cooking were 20 °Brix and 5% respectively, in proportion to the total weight of raw rice.

Fluoroacetate(Platol)중독 증상 연구 : 자살기도자를 중심으로

한창환,황주연,김경식,안석철 大韓神經精神醫學會 1984 신경정신의학 Vol.23 No.1

This study was designed to evaluate the clinical problems of fluoroacetate intoxication. The total number of the fluoroacetate intoxication patients who came to the emergency room of Han Gang Sacred Heart Hospital from Jan. 1, 1983 to Aug. 31, 1983 were 96 cases. Among them, 41 attempters who were consulted to the psychiatrist were evaluated and observed in detail. The following results were obtained. 1. The rodenticide poisoning accounts for 37.2% of all toxic substance intoxication(total 266 cases) at Han Gang Sacred Heart Hospital from Jan. 1983 to Aug. 1983. Among them, 96 cases(36.1%) of fluorcacetate intoxication were observed. 2. Female was affected 2.4 times more frequently than male. 35.5% of total cases belonged to age group 21∼30years, when incidence was most prevalent 3. As the route of drug obtainment, supplement were commonest(63.3%), purchase in 29.4%. 4. CNS disturbances such as drowsiness, stupor, semicoma and irritability were observed in 75.6% of the cases. Speech disturbances such as dysarthria, childish speech was observed in 9.8%of the cases. Convulsion(29.3%), tremor(12.2%) spasm and twitching(4.9%) were also frequently observed. Tachycardia was found in 43.8% of the cases and other frequent symptoms were nausea and vomiting(53.7%), abdominal pain(34.2%), mild or high fever(26.8%). Lower calcium(below 9mg) was found in 29.3% of the cases and lower potassium(below 3.5mEq) was found in 22.0% of the cases. EKG findings revealed QT prolongation(22.0%), ST-T change(22.0%) and u-wave, RBBB, and PVC(14.6%). 5. 92 cases(95.8%) recovered without sequelae and 4 cases(4.2%) expired.

산업근로자의 식생활 의식행태 조사

김무룡,황연자,차경미,이순자,위광복,남철현,김기열,김홍길 慶山大學校 保健福祉硏究所 1997 保健福祉硏究 Vol.1 No.-

This study was carried out to grasp the awareness and habits of food intake and use the information for health education program in order to help healthy dietary life. The survey was done in cooperation with health manager in industries on 1,200 workers who was selected randomly from 5 types of industries from Sep. 2 to Oct. 31, 1995. The results are summarized as follows: 1) The percentage of subjects who assess themselves "Healthy" was more higher in female, in 20∼29 age group, in single, in daytime workers, in college graduate than other groups respectively. 2) As for the degree of health education satisfaction, 35.5% of the subjects answered "dissatisfaction" 3) As for the exercise, 52.7% exercised for their health and the rate of exercise was more higher in male, in 30 years age group, in single than other groups respectively. 4) The rate of smoking was 57.6% and the rate of drinking alcohol was 47.3%. 5) 92.8% of the subjects got stress everyday and the rate is more higher in female, in less than 19 years old, in single, in longer working duration, in lower income, in high school graduates, in workers of product field line than other groups respectively. 6) As for drinking times of coffee or soft drink, two times per day was 29.5%, more three times per day was 28.0%. As for the eating speed of meal, 46.0% of the subjects answered "fast" and the rate was more higher in male, in 30 years age group, in married group, than other groups respectively. 7) With regard to the level of preference to instant food, 23.1% preferred to take instant food. As for the level of preference to hot and salty food, 28.1% preferred to have hot and salty food. 8) The score of eating behavior was 3.38±32 point to 6 point full marks. 9) With regard to the correlation among related variables, the variables of gender, marital status and working duration had positive relation with the variables of regular meal intake, the preference to food intake between regular meals.

급성 호흡곤란으로 내원한 성대기능이상 1례

함초롬,박경일,박혜연,황철웅,김종연,김태년,진재용,이성순 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Vocal cord dysfunction (VCD) is a respiratory disorder characterized by the abnormal adduction of the vocal cords upon inspiration, expiration, or both, leading to a diverse array of acute obstructive airway signs and symptoms (wheezing, chest tightness, shortness of breath, and cough). VCD frequently mimics or confounds asthma. Misdiagnosis as asthma has led to inappropriate treatment, most notably with high-dose corticosteroids. Mistaken for anaphylaxis or angioedema, VCD has led to intubation and tracheostomy. VCD should be suspected in patients who are treated aggressively for asthma but continue to experience dyspnea. The diagnosis of VCD is made from direct visualization of the vocal cords during an attack. Inspiratory, anterior vocal cord closure with a posterior glottic chink is seen. On pulmonary function testing, a pattern of "saw-toothing", or fluttering of the inspiratory limb, representing fluctuations in the abnormal cord motion is seen in VCD patient. Treatment includes discussion of the diagnosis with the patients, discontinuing unnecessary medications, using of a helium-oxygen mixture in acute attack. Speech therapy and psychotherapy are the mainstays of long-term treatment. Here in we report a case of VCD in company with asthma.

패혈증 이후 발생한 스트레스성 심근병증 2례

김종훈,남궁준,박혜연,황철웅,박경일,도준형,이성윤,이원로 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

The transient left ventricular apical ballooning syndrome, also known as takotsubo cardiomyopathy is a recently described novel cardiac syndrome. This syndrome is characterized by transient asynergy of the ventricular apex or mid-ventricle in the absence of obstructive epicardial coronay artery disease. This report concerns two types of morphologic difference about left ventricular apex and mid-ventricle. In this case, we report two types of stress-induced cardiomyopathy with review of literatures.

Clopidogrel에 의해 발생된 전신 염증 반응 증후군 1례

김민환,김종훈,박경일,박혜연,황철웅,김의석,도준형,남궁준,이성윤,이원로 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Clopidogrel bisulfate, a widely used inhibitor of platelet aggregation, is considered at least as safe as aspirin. We describe a 61 year old male patient who developed a systemic inflammatory response syndrome consisting of high fever, rash, chills, impaired liver function, and mild leukopenia after receiving clopidogrel after coronary angiography and stent implantation. The reaction resolved promptly after withdrawal of the drug, thus making the diagnosis of a clopidogrel induced reaction highly probable.