• 한국수학교육학회지시리즈D:수학교육연구
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• 제12권4호
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• pp.251-258
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• 2008

This paper deals with factors discriminating mathematically gifted and non-gifted students. Discussion of some characteristics of mathematically gifted students is done in the first session. Several factors distinguish mathematically gifted from the non-gifted students. High mathematical creativity, high intelligence and opinion of teachers are some of the key factors that can be used for discriminating mathematically gifted and non-gifted students. Research studies have revealed that cognitive as well as affective factors will enhance giftedness. In this study the investigator wishes to look in detail about the characteristics of mathematically gifted students and how they can be identified. Anyway, teachers can change environmental factors and maximum outcome of giftedness can be ensured."

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 봄 학술발표회 논문집
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• pp.175-180
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• 2002

Regardless of the carbonation of concrete is one of the importants causes of corrosion of reinforing steel in concrete with the cloride attack and the frost damage, the investigacion about the carbonation of concrete is limited and each investigator experiments under different condition. In this paper, the effect of temperature, relative humidity, concentration of $CO_2$, type of specimen, etc., were investigated according to the accelerated carbonation test. The principal conclusions from this research were as follows: 1) The carbonation of concrete is higher in olden of, under environmental condition(temperature-relative humidity, concentration of $CO_2$, ) of 40-40-10＞40-50-10＞40-60-5＞20-60-5. 2) Under same environmental condition, the carbonation of concrete in $\Phi$10$\times$20cm cylinder specimen is 2-8% higher then 10$\times$10$\times$40cm specimen.

• 한국정밀공학회지
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• 제16권7호
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• pp.158-167
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• 1999

Heat and moisture transfer associated with porous materials are investigated. The heat and moisture transfer in porous materials caused by the interaction of moisture gradient, temperature gradient, conduction, and evaporation are considered. The variations of temperature and moisture not only change the volume but also induce the hygro-thermal stress. The finite element formulation for solving the temperature and moisture transfer as well as the associated hygro-thermal stresses is developed. In order to verify the finite element formulation, the heat and moisture moving boundary problem in a half space and the hygro-thermo-mechanical problem in an infinite plate with a circular hole are analyzed. Temperature profile, moisture profile, and hygro-thermal stresses are compared with those of analytic solution and other investigator. Good agreements are examined

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2003년도 제21회 추계학술대회 논문집
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• pp.91-94
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• 2003

An experimental study has been carried out in a supersonic blow-down wind tunnel for examining the influence of streamwise vortices on normal shock-wave/boundary layer interaction. It has been reported by the earlier investigator the streamwise vortices generated by the blowing jets can significantly suppress the shock-induced separation and reduce the wave drag. The blowing jets generate the streamwise vortices with 45$^{\circ}$ angle in the spanwise direction. The shock waves are visualized by a Schlieren optical system. Appropriate measurement systems are provided for the characterization of shock wave/boundary layer interaction. The chamber pressure ratio and blowing pressure ratio are varied from 1.5 to 2.4 and 1.0 to 2.0 respectively.

• 융합보안논문지
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• 제6권3호
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• pp.13-19
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• 2006

컴퓨터 시스템이 침해를 당하여 네트워크를 사용할 수 없게 된 경우, 안전하게 휘발성 데이터나 중요 데이터의 자료를 얻는 방법으로, 최초 조사관이 사건발생장소로 직접 가서 CD나 USB의 형태로 만들어진 스크립트로 휘발성 데이터를 수집하여 생성되는 해시값으로 무결성을 증명하고 또 해시값이 적혀 있는 참관인의 서명을 받고 이를 네트워크를 사용 가능한 안전한 시스템으로 가서 해시값으로 인증을 하고 분석을 하는 시스템을 제안하였다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.2043-2047
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• 2003

The distributions of blood pressure, blood flow, and blow volume in the left common artery (LCCA) were determined using the lumping parameter method. In order to develop a mathematical model for microcirculation in LCCA, the present study adopted preexisted set of measured morphological data on anatomy, mechanical properties of the coronary vessels, viscosity of blood, the basic laws of physics, and the appropriate boundary condition. Pressures and volumes of blood and flow resistance were expressed in terms of electrical voltages, current, and resistances, respectively, in the electrical analog model. The results of two mathematical models, symmetrical and asymmetrical models, were compared with other investigator's data. The present results were in good agreement with previous studies. It was found that the mean pressure profiles were similar in both models.

• Journal of the Korean Statistical Society
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• 제8권1호
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• pp.3-14
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• 1979

When we estimate the population proportion of the individuals in the population for the attribute or the characteristic, we consider the sample survey. We can consider many methods of the sample survey, as mail questionnaire, visits, personal calls, etc. When we have the list of units in the population, we usually make use of the mail questionnaire. It is economical and free from the investigator's effect on the respondent, but it has some objections. The principal objection is that it involves a large nonresponse rate that might cause a singificant bias in the result. The bias arises from the different in the characteristics under investigation between those who respond and those who do not respond.

• 성인간호학회지
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• 제12권2호
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• pp.286-295
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• 2000

Nurses play an important role in patient education, including providing patients with useful and appropriate information. The purpose of this study was to explore what particular types of information were important to women diagnosed with breast cancer. Sixty seven women with breast cancer an outpatient clinic in W Christian Hospital responded to the structured questionnaires developed by the investigator. Interviews and mail surveys were used in this study. The findings in this study showed that six kinds of information needs arose, ranked as the signs and symptoms of recurrence, the possibility of recurrence, the possibility of metastasis, treatment, diet and physical activities in daily living. Marital status, level of education, and level of monthly income were not related to level of informational need. Younger women rather than older women had a greater need to seek information(r=-.471, p<.01). There was a significantly negative relationship between duration of disease and the score on information needs(r=-.32, p<.05). The findings have implications that the opportunity to ask questions and have accurate information on the recurrence should be provided to women with breast cancer.

• 부모자녀건강학회지
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• 제10권2호
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• pp.158-171
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• 2007

Purpose: The purpose of this study is to describe the degree of test stress and coping style and their relationship of high school students. Method: A descriptive and correlative study has been conducted to report adolescents' test stress and coping style. Nine hundred fifty four high school students were participated in this study and collected data by visit-survey with an organized questionnaire. Results: The mean score of perceived test stress was 2.98. High school students were more frequently use the affective regulation coping style than problem focused coping style. The relationship between perceived test stress and affective regulation coping was statistically significant. Conclusion: Through this study, investigator found coping styles were important factors influencing test stress of high school students. This study also shows that a number of characteristics of the high school students significantly affect levels of test stress, the most notable of these factors being grade, sex, and academic performance. Therefore, consideration of test stress and coping style should be included in the development of a stress management program for high school students.

• 기술사
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• 제41권6호
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• pp.38-44
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• 2008

Dr. Corley had various experiences as an outstanding structural engineer. His experience as the chief investigator for the collapse of World Trade Center and Oklahoma city building was so much useful to the lecture. His presentation had covered 3 different collapsed buildings like Oklahoma city, Pentagon and World Trade Center. He had shown to the audiences 2 videos and 76 slides by power point. The learned lessons from his presentation were: 1. The appropriate Building Code is very important. 2. The sound details are very important for the structure to resist the extreme outer force. 3. The continuous diagnosis and maintenance of the structure is important. 4. The reasonable attitude of the government against the accident is important. 5. The professional engineer must take a main role as a guard for the safety of the people.