버퍼를 가진 다중코드-코드분할다중접속(MC-CDMA) 시스템에서 동적 전송 제어 프로토콜 설계

김영용 대한전자공학회 2002 電子工學會論文誌-TC (Telecommunications) Vol.39 No.9

The demand for multimedia transmission in wireless networking is rapidly increasing. Performance evaluation in the CDMA system has been carried out on the voice-oriented system without re-transmission or buffering. We propose a multimedia access protocol with buffering and ARQ which can meet a variety of QoS requirements. We study the effect of buffering in MC-CDMA(Multi-Code CDMA) and design a dynamic rate control algorithms, whose simulation shows the efficiency of MC-CDMA. 무선 통신망에서의 멀티미디어 전송에 대한 요구는 빠른 속도로 증가하고 있다. 지금까지 CDMA에서의 시스템 분석은 패킷의 재전송을 위한 버퍼가 없는 음성을 위주로 이루어져 왔으나 본 논문에서는 버퍼링과 재전송을 고려한 다양한 QoS 요구조건을 만족할 수 있는 멀티미디어 접속 프로토콜을 제안하고 분석하였다. 먼저 다양한 전송률을 사용할 수 있는 MC-CDMA(Multi-Code CDMA) 전송방식 위에서 버퍼링의 영향을 살펴 보고 다양한 조건에서의 동적 전송률 제어 방식을 제안하고 시뮬레이션을 통해 제시한 방법의 타당성을 검증하였다.

일의 意味와 價値에 대한 考察

金榮龍 濟州敎育大學校 1998 論文集 Vol.27 No.-

勞作敎育의 家値에 대한 考察

金榮龍 濟州敎育大學校 1994 論文集 Vol.23 No.-

This study is an attempt to clarify the educational value of work through a concideration from the characteristics and historical thought of work education. The values of work education clarified in this study are summerized as follows. (1) The work education is helpful to the intellectual development with the activity of mental researches. (2) Owing to the mental, emotional, moral and social development with work activities well organized in school programme, the work education is helpful to the character building of the whole-man. (3) The work activities in school programme is helpful to the health and physical development of students on account of balanced growth of bodily organ under self-controlled movement. (4) The practical moulding of human being and wholesome outlook of vocation with work education programme, can be hoped by affirmative attitudes to its activities. (5) The work education is helpful to the development of sociality and morality, with the cultivation of rightspirit and favourable attitudes of endurance, sincerity, diligence, responsibility, cooperation, sacrifice, modesty and concession under this activities.

肝吸蟲症에 있어서 尿를 이용한 免疫學的 診斷에 관한 硏究

金榮容,李駿商,林漢鍾 고려대학교 의과대학 1985 고려대 의대 잡지 Vol.22 No.3

Human clonorchiasis is one of the most common trematode disease and of very important public health problems in Korea. In this study, the enzyme-linked immunosorbent assay (ELISA) was employed in the diagnosis by use of urine samples in human clonorchiasis. ELISA was performed with veronal buffered saline antigen of Clonorchis, peroxidase conjugated antirabbit IgG and orthophenylenediamine as a substrate by micro-method. The results obtained are as follows; 1. The mean O.D. (optical density) values of ELISA in the urine samples of non-infected human cases was 0.037±0.087. If we proposed the O.D. value 0.1 as a differential point of positive reaction, the specificity ELISA in the urine samples was 93% (187 negative reaction out of 201 non-infected human cases). 2. The mear. O.D. valuses in the urine samples of clonorchiasis was 0.580±0.574 and in the serum samples of clonorchiasis was 1.930±0.623. The sensitivity of ELISA was 87.0% in the urine samples (409 positive reaction out of 470 clonorchiasis cases) and was 88.4% in the serum samples. 3. In the distribution of the O.D. values in the urine samples of clonorchhiasis, false positive rates of cross reaction between C. sinensis and P.westermant were 34.7% in the urine samples of clonorchiasis. 4. When the results were compared between the urine and the serum samples of 181 clonorchiasis showed that 88.7% gave same reactions. In the clonorchiasis cases, the O.D. values between the urine and the serum simples were significant at a level of p<0.01. 5. In rabbits, the O.D. values of the urine and the serum samples in 16weeks after infection with C. sinensis metacercariae to were greatly increased than those of the urine samples in preinfection. The O.D. values in the urine samples increased accoording to intensity and course of infection. In conclusion, results of this study suggest that ELISA using the urine samples is more applicable in the diagnosis of human clonorchiasis in mass screening.

生長調節劑 處理가 溫州蜜柑의 花芽分化에 미치는 影響

金榮龍 濟州敎育大學校 1981 論文集 Vol.11 No.-

This study was carried out to find out the effects of application of CCC, Daminozide, Ethephon, NAA and GA on flower bud differentiation of Satsuma mandarin(Citrus unshiu MARC.). The results obtained were summarized as follows. Sprays of CCC, Daminozide, Ethephon and NAA considerably increased flower formation, and the three time application of Daminozide was the highest. Flower formation was significantly reduced with more application time and higher concn of GA. Single flower with abundant leaves was increased by GA but was reduced by three times application of CCC, Daminozide, Ethephon and NAA. No difference was found on flowering time with more application time and higher concn of growth regula- tors. A slight reducing tendencies were recognized in defoliation of CCC, NAA and GA, while increasing tendency was found in Ethephon treatment. With higher concn and more application time, tendency of a little discolored leaf was developed in Ethephon treatment, but dark green was showed in Damino- zide, NAA and GA treatment. Sprouting of new buds was reduced in CCC, Damino- zide, Ethephon and NAA but was increased in GA, treatment, when treated with higher concn and more application time.

EVA Nanocomposites 제조 및 특성연구

김영용,박일수,정효선,최재곤,김정규,조병욱 조선대학교 생산기술연구소 2003 生産技術硏究 Vol.25 No.1

Ethylene vinyl acetate random copolymer(EVA)/layered-silicate nanocomposites were prepared by melt or solution blending. The TGA thermograms of EVA/ layered-silicate nanocomposites showed an improved thermal stability as the layered-silicate contents increased. The decomposition temperature of nanocomposite was increased around 10℃ compared with pure EVA at 50% weight loss under N_2 atmosphere And in an air atmosphere, temperature difference in 50% wt loss between the nanocomposlte and the virgin EVA was around 100℃ The moduli in their thermomechanical module of nanocomposite are higher than pure EVA. Interlayered spacings of nanosilicates were slightly increased when prepared by melt blending. On the other hand, they were remarkably increased when prepared by solution blending. It may be explained that EVA moiety of the copolymer showed partial adsorption behavior on the surface layer of the silicate. It also revealed that the adsorption is more effective in the solution blending than in the melt blending.

한국의 작업장 생산시스템에 관한 연구-미시분석과 거시분석을 결합하여

김영용 한국사회경제학회 2002 사회경제평론 Vol.18 No.-

In the case of Korean manufacture sector, profit rate has fallen in the long-term owing to the decline of output-capital ratio. Output-capital ratio is essential variable in production system, therefore profit rate falling is connected to malfunction of production system. It is discovered that decline of the ratio result from deepening of organic composition of capital in excess of labor productivity ascension. Besides exhaustion of potential productivity gains source in Taylorism has accelerated decline of output-capital ratio. It can be expected that newly introduced innovative workplace practices may create new foundation of accumulation via new norms of work organization and compensation, But as a result of analysis, we find that new practices influence organizational performance only to some extent. This is maybe due to lack of complementarities among practices and union's opposition to new practices. Though various attempt to detect complementarities, we cannot find consistent evidence for the effect. We can regard the timing of practice introduction and management's opportunistic behavior as the cause of the result. If we accept Gramcian concept of crisis, then we can conclude that Korean production system meet potentially crisis. Thinking conservatively, it is evident that at least something is wrong in Korean production system.

고위 고관절 탈구를 동반한 결핵성 고관절 및 발달성 이형성 고관절의 인공고관절 전치환술

김영용,안재용,성열보,심재찬,박찬각,강경민,김문기,윤용산,박해수 대한정형외과학회 2003 대한정형외과학회지 Vol.38 No.3

裁培敎育을 위한 室內園藝에 關한 硏究

金榮龍 濟州敎育大學校 1984 論文集 Vol.14 No.-

Induction of indoor garadening in school is very important thing for education on plant culture and practical for living to the growing pupils. The results stated in this study are summarized as follows. The indoor gardening in school have an objects of inducing pupil's concern and interest in plant culture and fostering emotion by induction and observation of beautiful and charming indoor plants. This indoor gardening is classified into ornamental garden, dish garden, terrarium, hanging plant, wall plants and hydroponics. Those should be decorated with suitable method depend on the plant species and place. There are many species of suitable plant for green interior in school room, such as principal foliage plants, annual and biennial plants, perennial plants, bulbs, flowering tree, and wild plants. It must be cultured on concideration of environmental condition of light, temperature, humidity and flower pot for successful green interior. There are methods of plane, side, and three-dimensional decoration of indoor flower pot and container. The point of decoration is effectual green interior with balance of plant and place, and with harmony on spatial relation.

VR 뉴스의 제작연구

김영용 한국방송학회 2003 한국방송학회 학술대회 논문집 Vol.- No.-