OOP언어의 Cast 방법에 관한 연구

윤성일,남숭환,이봉하 공주영상정보대학 2002 논문집 Vol.9 No.-

OOP 언어인 Java, C++는 대표적인 객체지향 언어로서 널리 사용되고 있다. 이들 언어의 특징은 c1ass를 이용하며 다양한 cast방법에 의한 효율적인 프로그래밍 작성이 용이하다는 것을 볼 수 있다. 본 연구에서는 cast의 효율적인 설계방법과 작성기법들에 대하여 연구하였다. 클래스를 이용하여 모듈을 세분화 조립하는 경우 프로그램 성능향상에 현저히 드러난다. 또한 프로그램활용 목적에 따라 유용성, 이식성, 확장성 등을 고려하여 시스템을 디자인하는 것이 중요하다는 것이다. 쉬운 조작으로 많은 효과를 이를 수 있는 것이 COP언어의 특징이다. OOP 언어는 또한 컴파일 시간과 실행시간에 리턴하는 값이 다른 경우 프로그램에 치명적인 영향을 미치기 때문에 class를 이용한 casting 방법을 이용하는데 상당한 주의가 요구되는 것을 위의 예로 보았다. 이로서 향후 연구과제는 실행시간 리턴 값, 오브젝트 참조 값, 메모리의 효율적 사용방법을 위해 새로운 cast 연산자들인 const_cast, dynamic_cast, reinterpret_cast, static_cast의 효율적인 기능을 분석하는데 있다.

한국과 스웨덴의 생활체육에 관한 비교 연구

윤상화,남동현 龍仁大學校 體育科學硏究所 1998 體育科學硏究論叢 Vol.8 No.1

This study is with regard to the physical Education and Sports of Sweden, and has the purpose to give the assistance to the development of Physical Education and Sports in Korea, by use of the characteristics in the Physical Education and Sports of Sweden. As the results of this study, we would like to suggest the under-mentioned for the development of Korea Physical and Sports. 1. The Korean Physical Education and Sports Program must use the geographical conditions. 2. We must its importance to the Social Physical Education from the administration based on the Elite Physical Education, and thus it is necessary to make it as 2 base in the Korean Physical Education. 3. We make promote the Physical strength from the young times and guide to be interested in the use of leisure by the strict performance of School Sports Time. 4. The person graduated from the Dept. of Social Physical Education of each University or Social Sports Instructor are sure to be dispatched in the General Sports Field, and thus it is necessary to take charge of the sports guidance for the public sincerely. 5. The Social Sports Class of Health Class related to the housewives is operated in each Village Ward Office or upon the school during the vacation, and thus progress the concern on Physical Education, and acknowledge the service credits for the students who perform the voluntary service in the program, and thus it is necessary to promote the participation degree. 6. We are out of the department which takes charge of the formal Social physical education, and thus it is necessary to make the research part for the national-wide network. 7. The law on promotion of national sports is changed to the compelling law, and then it is strongly required which the Government shows the powerful will on the Sports Making as Living.

한국 여성스포츠 활성화를 위한 연구

윤상화,남동현,조임형 龍仁大學校 1997 용인대학교 논문집 Vol.13 No.-

Historically women have been discriminated not only in sports but also in another fields of social life according to the social cultural backgrounds and customes. This sex discrimination is due to the lack of the opportunity to participate sports, the ideological prejudice of male diversionism and the systematic inequality uttered in the nomological, institutional, environmental aspects of society. And the social conception on male adventage and female dependence enforces the present discrimination in the women sports. Theoletically, discussion on women sports has been focused on the dogma that man governs woman in the sense of sex inequility in sports, limitation of female opportunity in sports, inequility of conservative system and the relative deprival of employment opportunity from the point of liberal, marxist, radical, socialist view. The sex discrimination is due to the social, cultural circumstance of a specific society and prejudicial cultural tradition. The cultural tradition form the idea that woman can play the role only through the family and companion because of her biological and depentent character and enforce such a sex role and social training. The social-role prejudice which began in the family and companion would be enforced and magnified through the discrimitive management of the curriculum and phisical education program at school. The sex discrimination has such a tendency of aggravation and perpetuity because of male-prejudicial news and scarcity of role-model, which have been discussed in many researches. But woman's sports were advanced quite much in accordance with feminism movements and the change of social/cultural definition on woman. In spite of all of these, there still appears to be some prejudice in the psyological, social-psychological, institutional realms. To sum up the factors which prevent woman's sports activate, Firstly, negative cognition of common people on woman's sports. Secondly, the prejudice that women are not adquite for sports activity. Thirdly, women themselves have the prejudice that sports activity makes their body manly. And to sum up the important theoletical factors concerned with the woman's sports activation, Firstly, woman has psychologically the stronger emotional intentionality than man. Secondly, woman has the weaker motivation for sports psychologically, which is due to her parents' indifference and the incorrect belief of 'womanlikehood' or 'out to be womanlike' and so on. Thirdly, because woman's participating the sports activity is influenced by intermediate group like family, the opportunity-situation became the important variable. Some conclusion for activation of Women's Sports Activation acquired in the study is as shown in the followings. Firstly, We must change the ineffective sports activities in the whole society, including the system, which places the importance in the examination at the existing school, and the physical education program which lays stress on the sudents to comply with the characteristics and interests of women in the scope of life-time sports, and the education on the leader who controls these programs effectively is urgent. Secondly,Mass Media must be interested in the sports, physical education activities of women, and show the positiveness on the program related to the women's own improvement and culture and on the public-information related to the concrete practical method.

A1-Cu 合金粉末의 燒結品에 關한 時效硬化

南勝義,尹太鴻,趙誠秀 弘益大學校 1985 弘大論叢 Vol.17 No.2

During compaction and sintering premixed Al-Cu powders, the effects of green density, sintering temperature and sintering time on dimensional change and hardness in sintered specimens were discussed and the phenomena of all conditions during age hardening were examined. The specimens were sintered in nitrogen atmosphere at temperatures ranging from 560℃ to 620℃ for 10, 20, 30 and 60 minutes. The dimensional changes of specimens during sintering are occurred in no time as the sintering temperature increased, and the expansion is occurred largely as the green density increased. The magnitude of peak hardness to age hardening is similar to wrought parts.

Kodak Insight 구내필름의 치아우식증 진단능에 대한 연구

윤영남,이상래,이병도 大韓口腔顎顔面 放射線學會 2004 Imaging Science in Dentistry Vol.34 No.1

Purpose : To compare the diagnostic accuracy of Kodak Insight film with other intra-oral films in the detection of dental caries. Materials and Methods : Periapical radiographs of 99 extracted human teeth with sound proximal surfaces and interproximal artificial cavities were made on Kodak Ultra speed, Ektaspeed, Agfa Ektaspeed and Kodak Insight films and automatically processed. Six dentists examined the presence of dental caries using a five-point confidence rating scale and compared the diagnostic accuracy by ROC (Receiver Operating Characteristic) analysis and ANOVA test. Results : The sensitivity of Kodak Ultra speed, Ektaspeed, Agfa Ektaspeed and Insight film were 0.84, 0.77, 0.75 and 0.79 respectively. The specificity of Kodak Ultra speed, Ektaspeed, Agfa Ektaspeed and Insight film were 0.97, 0.95, 0.96 and 0.94 respectively. The mean ROC areas (Az) of Kodak Ultra speed, Ektaspeed, Agfa Ektaspeed and Insight film were 0.917, 0.910, 0.894, 0.909 respectively. There was no significant differences between Az of Insight film and other films (p = 0.178). Conclusion : Theses results suggested that Kodak Insight film have the comparative diagnostic accuracy of dental caries with Ultraspeed and Ektaspeed films.

타이어 설계인자를 고려한 자동차의 조종 및 안정 특성에 관한 연구

윤성운,홍석주,최규남 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.2

As the technique of automobile industry is being advanced, the advancement of performance for vehicle is being required. In order to achieve this purpose, the study on the handling and stability which are produced by moving vehicle is carried out actively. Ability to predict vehicle performance using computer simulation is essential to reducing the development time for tire companies as well as car makers. From the previous research. we showed that handling simulation tool developed for J-turn and lane change maneuvers on ADAMS could be used in predicting the performance difference among tires with different specifications in vehicle mild handling behaviors. Through this study, some meaningful correlations were achieved. Also barriers to direct application of the simulation technique to tire development process and several technical problems that should be resolved were iden tified. In this results, ability to predict vehicle performance using computer simulation is essential to reducing the development time for tire companies as well as car makers.

중산간 농업용 만운저수지의 수질환경특성

남귀숙,장정렬,이광식,윤경섭,이상준 한국환경농학회 2003 한국환경농학회지 Vol.22 No.1

농촌지역의 도시화와 산업화에 따라 농촌 수질환경의 오염이 심화되고 있다. 경북 안동의 중산간지대에 위치한 만운저수지는 유역면적 23.8 km², 수표면적 0.4 km², 저수량 2.0×10^(6)m³의 부영양화 된 중규모 농업용저수지로서 1999년 수질환경특성조사를 실시하여 오염된 유사 농업용 저수지의 수질특성이해에 중요한 자료로 활용하고자 하였다. 만운저수지의 수질에 영향을 미치는 유역면적값(DA)/호수면적값(SA)의 비가 56.1로 국내 다른 농업용 저수지보다 높게 나타나 유역의 오염물질 부하가 높은 편이며, 평균 수심과 관련된 유효저수량(ST, m³)/수표면적(SA, m²) 비는 4.79로서 안동호, 팔당호보다 낮고 삽교담수호 등과 비슷한 값을 보여주어 부영양화의 잠재성이 높은 것으로 나타났다. 만운저수지의 수질조사결과 COD는 11.1 mg/L, 총질소 1.426 mg/L로 환경기준중 생활환경 Ⅳ등급인 농업용수 수질기준을 초과하였으며, 총인은 0.093 mg/L로 Ⅳ등급의 수질을 나타내고 있었다. 유입하천은 총질소(1.426~3.809 mg/L)가 비교적 높게 나타나고 있어 총질소에 기준한 수질개선 방안이 요구되었다. 식물성플랑크톤 조사결과 Oscillatoria와 근연종인 Lyngbya가 우점하였으며, 둥물성플랑크톤은 대부분의 지역에서 적조현상을 일으키는 와편모충인 Gynmodinium spp., 암색편모충인 Cryptomonas spp.이 우점하였다. 부영양화도지수(TSI)를 이용한 1999년도의 시기별 영양상태 변화는 9월에 과부영양상태를 보었으며, 연도별 TSI_(M)지수는 '96년, ‘97년에 부영양, '98년의 과영양으로 영양상태가 증가하였으나, 강우가 다소 많았던 '99년에는 강우의 영향으로 다소 개선되어 나타났다. 결론적으로, 저수지의 물리구조적 유역특성 및 수리학적 특성상 만운저수지는 부영양화에 취약한 특성을 가지고 있으며, 강우량에 영향을 받고는 있으나 전반적으로 부영양화도가 증가하는 추세를 보인다. 따라서, 이와 같은 추세변화를 정확히 인식하고 그에 적절한 대책을 마련하기 위해 농업용수 수질측정망 운영이 상당히 중요하게 인식되어지며, 수질환경 특성을 감안한 합리적 운영이 이루어져야 할 것으로 사료된다. Manun Reservoir, located in Andong district, has the capacity of 2 million tons in irrigation water supply with the drainage area of 23.8 km². Manua Reservoir is over fifty year old, and shallow in depth. The ratio of drainage area (DA) to reservoir surface area (SA) as an effective physical parameter on water quality was 56.1 and was higher than those of other agricultural reservoirs. The ratio of reservoir storage (ST) to SA in Manun Reservoir was 4.79, and the mean depth was below 8 m. Both ratios of DS/SA, total area (TA)/ST and ST/SA in Manua Reservoir were relatively higher than those in other agricultural reservoir and natural lakes in Korea. These physical parameters in Manun Reservoir, however, had a eutropic potential significance. Average of COD, TN, and TP in Manun Reservoir were 11.1 mg/L, 1.426 mg/L, 0.093 mg/L, respectively. In the inflow stream of Manun Reservoir, the TN (1.426~3.809 mg/L) was higher than those in reservoir. Only Lyngbya spp. was dominant in phytoplankton for this study period, and Gymnodinium spp., Peridinium spp., and Cryptomonas spp. were dominant in zooplankton. According to the Carlson's trophic status index, Manua Reservoir was eutrophic in 1996, 1997, and 1999, and hypertrophic in 1998.

스포츠의 정치화 과정에 관한 연구

윤상화,남동현 龍仁大學校 體育科學硏究所 1996 體育科學硏究論叢 Vol.6 No.1

The growth in popularity of sports over the past several decades has brought increased attention from government and new possibilities for sport management. This study considered the relationship between sports and politics, and the effects that demographic characteristics have on opinion of this relationship. The research provided and extensive discussion of the theoretical and historical connections between sports and politics. survey analysis were conducted to test whether Korean students at three major colleges in Pusan, Korea, saw the connections between sports and politics, what factors determined their views on these relationships, and if their view affected their opinions on appropriate sports management policy. The study found that there was significant support for the claim that sports and politics were related. It showed that the people who were most likely to see the connections were well-educated, less active on a daily basis in either sports or politics, desirous of having integrated government involvement in sport management, older, socially aware, politically liberal in their desire that government meet citizens' needs, involved in sports for physical fitness or entertainment, and male.

國産高張力鋼의 熔接部의 機械的 性質에 關한 硏究

南勝義,金聖培,金錫胤 弘益大學校 1982 弘大論叢 Vol.14 No.2

A study has been performed on the mechanical properties and the micro-structure of the welded zone in the high tensile steel produced in Korea. The experimental results indicated that the tensile strength and the hardness were increased in welded zone. The micro-structure of the welded zone was finer than that of the base metal. It may be considered that the increase of the mechanical properties is due to the chemical composition of electrode being different from the base metal and to the structure getting finer through the course of solidification.

C++의 자료추상화 기능에 관한 연구

윤성일,남숭환 공주영상정보대학 2000 논문집 Vol.7 No.-

가장 많이 사용되는 객체지향언어 C++는 1980년대 초 Bell연구소에서 B. Stroustrup의 그룹에 의해 개발되었으며, C와 호환성이 있고 모든 기능들을 포함하며, 클래스 및 상속 둥의 객체지향 개념을 지원하고, C언어보다 포괄함수와 주소(reference)같은 고급기능을 지원하는 등 C++ 자료 추상화 개념과 확장성에 대하여 알아본다.