남자 초·중학생의 무산소성 작업능력과 무산소성 파워의 관계

정동식,정덕조,정성태,이병근,전태원,김은혜,이동규,정동춘 師範大學 體育硏究所 1998 서울大學校 體育硏究所論集 Vol.19 No.2

The critical power(CP) is the highest intensity to sustain for a long time without a fatigue. The anaerobic work capacity(AWC) is the highest anaerobic capacity to be provided by anaerobic energy system without the infection of hypoxia. The purpose of this study was to determine the relationship between AWC and AnP and to verify the validity of AWC. The subjects were consisted of 10 elementary and 10 middle school male students(12.8±1.3yrs, 159.3±12.1㎝, 49.4±11.8㎏). The critical power and anaerobic work capacity were calculated by work-time relationship after four cycle ergometry test to fatigue from 1 to 10 minute. The anaerobic power included Margaria-Kalmen test, Sargent jump and Wingate test. The main finding were as follows. The AWC of elementary and middle school students. were 6.47±2.63KJ and 11.10±3.01KJ. The AWC of elementary students was 58.3% of the middle school students's one. The AnP of elementary students were 47.2∼66.5% of the middle school students's one. And there were high correlation between AWC and AnP(0.64∼0.87, P<0.01). This study showed that AWC is useful index on AnP both elementary and middle school students.

플라즈마 표지소자의 제작

이상윤,라병욱,박동수,황인헌,이덕동,신영남,박성배,이동욱,박용석,박형근,손상호,권태근,채경락,정경득 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

An Ac-type Plasma Display Panel (PDP) operating with Ne-Ar(0.1%) Penning mixture gas is fabicated. The characterics of the panel with electrodes covered with thin and thick dielectric layers are studied. The brightness of the Neon-orange light emitted by the panel measured as function of applied voltage and frequency. As an application, a graphic display system equipped with PDP showing still and moving pictures is made.

體育의 本質에 關한 硏究

盧熙悳,金東進 서울대학교 교양과정부 1973 論文集 Vol.5 No.-

In this paper, the present writer compares and analyzes the theories of Western Scholars on Physical Education tobring about better understanding of the role of physical education. The historical and social background which has influenced the usage of technical terms(in physical education) and the ideas which have caused misconception about physical education are examined. And the concept of synonyms that has given rise to confusion in physical education is also discussed.

프로그램 재사용을 위한 객체지향 클래스 라이브러리 설계

황득영,정계동 三陟大學校 1999 論文集 Vol.32 No.1

The advantage of object-oriented technology is reusability and maintenability for software. This paper presents the design method of object-oriented class library for understanding and reusing a program. The design information and source program can be stored and retrieved through module in this method. The reusable component is created and stored in table and these information enables the retrieval of interface class which can cross-reference each module. For understanding the program, the relationship of class is represented by graph and the node class is iconized for visibility. In object-oriented design, the relationships of each module, inheritance relationships, and composite relationships are created. In program design, detailed polymorphism and friends relations are created and these additional information is tablized in database. As a result, this paper's method makes the construct of system easy because of the increased understanding when the program is developed and maintained. Since this paper's method increases the understanding of program at design and maintenance, it makes the construct of reusable system easy.

계면적을 고려한 형상기억합금 Fiber 금속기 복합재료의 기계적 거동해석

안득만,김동현 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-

본 논문에서는 matrix와 fiber간의 계면적을 고려한 형상기억합금 fiber 알루미늄 복합재료의 강화기구가 연구되었다. 형상기억효과에 의해 기지재료의 축방향 압축잔류응력으로부터 복합재료의 인장성질이 강화된다. TiNi 연속섬유 Al 복합재료의 거동해석에 있어서 잔류응력과 계면적을 고려한 혼합법칙과 계면적을 고려한 Eshelby형태의 모델을 이용하여 복합재료의 강화기구를 설명할수 있는 모델을 제안하였다. 이 모델을 이용하여 실험에서 확인된 fiber와 matrix사이의 계면적에 따른 항복응력의 변화를 설명할 수 있었다. In this paper, strengthening mechanism of shape memory alloy fiber metal matrix composite considering interface area were studied. The tensile property of the composite material is strengthened from the compressive residual stress of the longitudinal direction due to shape memory effect. In analyzing the behavior of TiNi continuous fiber-Al composite, a law of mixture and Eshelby type model considering residual stress and interface area were introduced. From these models, we can explain the variation of tensile yield stress due to interface area.

신축 공동주택의 VOCs와 알데히드류 성분에 대한 실태조사

임득용,김지현,황인조,김동술 경희대학교 2004 環境硏究 論文集 Vol.13 No.-

In comparison with other studies, in particular, the emission of indoor HCHO in new apartments were very serious and Vacs showed below the Japan's guidelines (260 ㎍/㎥) excepting toluene (324.31 ㎍/㎥). Concentration of volatile organic compounds (VOCs) including aldehydes in indoor air was analyzed at 3 new apartments (at the lower, middle and upper floors of each apartment) during the Spring in 2004. The sample gases of Vacs and aldehydes were collected by Silicon canister (6 L) and 2,4-DNPH cartridges, and the analysis was made by the GC/MSD and PLC. As a result of the analysis, formaldehyde (HCHO) amongst aldehydes was found the highest (874.63 ppb) at the upper floor of C Apt., and the aldehydes' concentrations were S > C > K Apt. each. Also it did not show an apparent variation of characteristics according to floor. The concentration of VOCs was the highest (819.22 ppb) at the upper floor of C Apt. which exhibited in proportion with height.

객체지향 시스템에서 클래스 재구성에 관한 연구

정계동,황득영 三陟大學校 1998 論文集 Vol.31 No.1

객체지향 기술의 장점은 재사용성과 유지보수의 용이함을 들수 있다. 일반적으로 노드 클래스 삽입, 삭제시 위치만 고려하므로 프로그램 이해의 어려움이 있었다. 따라서 본 논문에서는 크래스 노드 삽입과 삭제시 위치를 설정하고 데이터 멤버를 세분화, 일반화함으로써 프로그램 이해를 쉽해 할 수 있다.

클래스 라이브러리를 이용한 재사용 시스템 설계 방법에 관한 연구

정계동,황득영 三陟大學校 1998 論文集 Vol.31 No.1

최근 새로운 소프트웨어의 개발보다 기존의 소프트웨어를 재사용할 수 있도록 하는 연구가 활발히 진행중이다. 본 논문에서는 클래스의 관계성을 이용하여 재사용 가능한 객체지향 라이브러리 시스템을 구축하였다. 그리고 설계 및 구현단게에서 개발자에게 프로그램의 이해를 쉽게 하기 위하여 클래스 정보를 아이콘화하여 시각적인 면을 높였다. 또한 설계문서와 프로그램을 화면상에서 동시에 보면서 작업을 할 수 있도록 하였다. 따라서 본 논문에서 제시하는 방법은 클래스의 재구성시 프로그램 개발 및 유지 보수를 원활하게 하여 클래스의 재사용성을 높여준다.

자두 추출물을 이용한 미용비누 제조 및 여드름 환자에 대한 효과

한만덕 ; 윤옥현 ; 박동철 ; 박지원 김천대학교 2003 김천대학교 논문집 Vol.24 No.-

In this study, authors investigated the bathroom soap development using plum(Prunus salicina Lindl. cv. Soldam) extracts and studied the effects and safety of a plum soap on acne patients. For obtaining antibacterial material from dried plum, the serial extraction using organic solvent was carried out and gained of 0.2% hexane, 0.2% chloroform, 0.23% ethyl acetate, 9.8% butanol and 2.1% water extracts. The main bioactive contents of the soap were consisted of 0.006% plum extract, 0.1% glycyrrhiza extract, and 0.15% tocopheryl acetate. A clinical study of soap containg 0.006% plum extracts was carried out on three groups of people: a treatment and 2 control groups on acne patients. Efficacy and safety were assessed at baseline and at one month later. The group applving the soạp with plum extract felt better than the one applying the 2 control group. Some patients developed mild and transient local side effects. The plum soap didn't change at 40℃ and was 130 hardness. In conclusion, cleansing three times a day with a facial soap consisting 0.006% ethyl acetate extract of plum was found to be effective and safe for patients suffering from acne vulgaris

學生들의 水泳學習에 對한 實態調査의 分析

金潼得 경성대학교 1982 부산수산대학 논문집 Vol.3 No.1