통신사업자의 멀티미디어 사업영역 설정에 관한 연구

윤문길,박계두 한국항공대학교 경영연구소 1997 경영연구 Vol.4 No.1

The businesses of computing, communications, and content are converging or collapsing to create a new industry sector: multimedia industry. This new industry is the engine of the new economy and will be critical to leading a successful transition Synergy in the fields of telecommunication, information technology, consumer electronics and content providers is me of the key factor in making multimedia services and products a reality today. The convergence of these traditionally independent sectors is giving a great improvement to the multimedia market, providing the end users with new tools and services, almost unrealizable only a few yews aga In this paper, at a point of telecommunication carriers view, we address a business domain for multimedia market, which contains the scope of the multimedia business to be adopted and the integration strategy of the related business Based on the analysis for each multimedia industry, we recommend some suggestion for deciding the multimedia business domain of telecommunication carriers.

한 개의 지중 전열선에 의한 열전달 분포에 관한 연구

전계웅,윤영환 國立 昌原大學校 産業技術硏究所 1999 産技硏論文集 Vol.13 No.-

Heat transfer in soil has been interested recently in fields of air conditioner, heat loss from buried pipes and especially floor heating in agricultural greenhouse for better production of the crops. In this study, temperature distributions from an electrically heated pipe buried under ground have been measured by thermocouples and analyzed by numerical solution of two-dimensional heat conduction equation with a commercial program, NISAⅡ. From the study, the temperature distributions in the soil were relatively sensitive to the thermal diffusivity (α) but almost invariable to surface heat transfer coefficient(h). When thermal diffusivity, α is equal to 0.543×10??㎡/s, there are good agreements between experimental data and numerical solutions. The value of thermal diffusivity is almost upper limit of those from several references according to wetness of soil. Therefore, it can be deduced the condition of soil was fully wetted.

역압력구배하에서 윗벽면 및 평판슬릿흡입이 난류경계층의 구조에 미치는 영향

박계향,이학성,윤명식,유상신 한국항공대학교 1994 論文集 Vol.32 No.-

역압력 구배하에서 벽면흡입과 모델 평판의 슬릿흡입이 난류 경계층구조에 미치는 영향에 대하여 실험적으로 연구하였다. 압력탭이 설치된 평판을 실험부에 설치한 후 평판위에 역압력구배가 작용되도록 하고 경계층 내의 속도 분포와 난류강도를 열선유속계로 측정하였다. 역압력구배가 커지면 경계층의 천이점은 평판의 상류쪽으로 이동하며 평판의 벽면에서 슬릿흡입을 하면 경계층내의 난류강도가 감소하고, 흡입량을 증가하면 난류 강도는 더욱 감소한다. An experimental study on the boundary layer structure on the flat plate with upper wall and slit suction under adverse pressure gradients is presented. Velocity profiles and turbulent intensities in the boundary layer are measured by hot-wire anemometer system. The transition point of a bondary layer moves upstream direction as the adverse pressure gradient increases. Slit suction causes a reduction of turbulent intensity of boundary layer. Reduction of trubulent intensity increases as the suction coefficient increases.

대학써클의 지도행정분제분석

이기윤 忠北大學校 學生生活硏究所 1978 學生生活硏究 Vol.3 No.-

본문참고

컬럼반응조내에서 과립 활성탄상에 고정된 미생물에 의한 BTX(벤젠-톨루엔-크실렌)의 제거에 관한 연구

오계헌,윤경하 순천향대학교 부설 산업기술연구소 1995 순천향 산업기술연구소논문집 Vol.1 No.2

The microbiological degradation of benzene(B), toluene(T), and p-xylene(X) was studied in column reactors with granular activated carbon(GAC) as a support matrix. For the initial experiment, bildegradation of B, T and X was evaluated in the test cultures growing in shake-flasks, respectively. Microbial growth was measured by dry weight and degradation of BTX was verified by HPLC, GC and UV/vis spectroscopic analysis of the residual substrates concentration in the test cultures. The effects on the degradation of B, T and X by pH, substrate concentration and supplemented ascorbic acid were compared. Immobilization of BTX-degrading bacteria on GAC was examined by scanning electron microscope. The test culture was stabilized as a fixed-film system in the GAC column reactor. BTX degradation was evaluated with a batch and continuous mode of operation of the GAC fixed-film column reactors. Concurrent degradation occurred on mixtures of benzene, toluene and p-xylene.

A₃B형 1예

박덕우,박일우,윤갑준,임성자,신계철,이성일 연세대학교 원주의과대학 1995 원주의대논문집 Vol.8 No.1

줄넘기 운동과 달리기 운동이 비만 초등학생의 신체성분 변화 및 기초체력에 미치는 영향

한상철,강계윤,김평석,이상호,하민수 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.1

This study has it's purpose on choosing a reasonable exercising program and finding detailed training skills for preventing child obesity and increasing physical fitness, by analyzing the correlation the improvement of body composition with increase of physical fitness through Jumping-rope exercise and interval running training for obesity children. To study a new program, we divided into Jumping-rope group(l0) and interval running group(l0), then trained them with a new program for 12 weeks. After measuring subjects body composition and physical fitness, we tested the means of each difference, the results are as followings. First, body composition were effective for muscle(p<.001), fat(p<.01), in Jumping-rope group and moisture(p<.05), muscle(p<.001) in running group. Second, basic physical fitness, was effective for 50m run(p<.01), sit-up(p<.001), 1000m run(p <.05), bending-down(p<.001) in jumping-rope group and 50m run(p<.001), a long jump(p<.001), sit-up(p<.001), 1000m run(p<.01), bending-down(p<.001) in running group. Third, there was nothing significant for body water(p<.696), muscle(p<.516), fat(p<.606) in two groups. Fourth, we got a significant difference in 1000m run(p<.05) from two groups. As a conclusion, according to this study, jumping-rope affected positively in body composition, while running did in physical fitness.

스포츠 소비자의 스포츠용품 구매행동에 관한 연구

임효택,이계윤 한국스포츠리서치 2001 한국 스포츠 리서치 Vol.12 No.4

The purpose of this study was to analyze and determine the relationships of the users of Sport and leasure facilities with factors related to commercial sport and leasure products(the interests in sport and leasure products, the cognizance of sport and leasure products, the cognizance of the brands and the cognizance of the quality). 700 subjects answered questionnaires. The result were as follows : 1. In comparison of sex with the factors, there were significant differences in all factors excepting the factor of quality. Male had more interests in sport and leasure products and had more cognizance of brands than female. Female had more cognizance of products than male. 2. In comparison of age with the factors, there were significant differences in all factors excepting the cognizance of the products. Generally, regardless of age, the interests and cognizance of quality were higher than the other two factors. 3. In comparison of marital status with the factors, there were no significant differences excepting the interests. the married had more interests than the unmarried. 4. In comparison of formal schooling with the factors, there were significant differences in all factors excepting the cognizance of the products. 5. In comparison of monthly income with the factors, there were significant differences in all factors excepting the cognizance of the products. In general, the more monthly income, the more interests in and the more cognizance of brands and quality of the products. 6. In comparison of the events of sport and leasure with the factors, there were significant differences in all factors excepting the cognizance of the quality of the products. In comparison of activity levels, there was significant difference only in the cognizance of the brands. 7. In the events of sport and leasure, the highest interest in the products was observed in golf while the highest cognizance of products was observed in squash and racket-ball. The highest cognizance of the brands of the products was observed in bowling. In case of participating in the activities once a week, the highest cognizance of the brands was observed. 8. Sex was significantly related to satisfaction with goods for sport and leasure. According to formal schooling and monthly income, there were significant differences in the satisfaction with the products. 9. According to the events of sport and leasure and the activity levels, there were significant differences in the satisfaction with the products. The highest satisfaction was observed in squash and racket-ball. while the lowest satisfaction was observed in bowling and aerobic dance. In case of participating in the activities every day, the highest satisfaction was observed.

신경아세포종양 신경초종 1예

남용호,김지연,송계용,윤태진 대한피부과학회 2006 大韓皮膚科學會誌 Vol.44 No.4

유방초음파 검사의 유용성에 대한 연구

문양인,김병학,명화련,도윤수,김계환,손정훈,김미회 한국건강관리협회 2000 건협 Report Vol.3 No.-