이동 애드 혹 네트워크에서의 환경적응형 QoS AODV 라우팅 프로토콜에 관한 연구

裵振勝,宋東勳,吳世德,鄭燦赫,金玄郁,李光培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

In this paper, we propose a bidirectional mobile Ad Hoc routing protocol based on AODV(ad-hoc on-demand distance vector routing) with QoS(quality of service) support. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS guarantee between end points is a very important issue. The existing AODV routing protocol is implemented to use only BE (Best Effort) service. However, actual wireless mobile environment requires to reduce a waste of communication resources and meet with the real-time change of data paths by setting up routes with QoS support, considering available communication resources at each node in advance. Therefore, in this thesis, we propose an adaptive QoS support method using hello message in order to rapidly meet with the change of available communication resources and to smoothly perform route maintenance. For performance evaluation, we analyzed the average data reception rate. At that time, we used evaluation parameters such as node's mobility-stop time, hello message period, and packet priority, considering the node's mobility and the number of best effort/QoS data flows. As results, we found that with our proposed method the average data reception rate was increased 16.293%, 15.914%, 17.238% for 300 mobility-stop second case and 4.809%, 4.264%, 2.956% for 300 mobility-stop second case.

광합성세균 Rhodospirillum rubrum의 생장과 Bacteriochlorophyll 및 Carotenoids의 형성에 대한 탄소원의 영향

송승희,이수오,오덕철 濟州大學校 基礎科學硏究所 1994 基礎科學硏究 Vol.7 No.1

광합성 세균인 Rhodospirillum rubrum으로 생장과 색소 형성에 대한 탄소원의 영향을 조사하였다. 탄소원은 acetate, alanine, glutamate 그리고 malate였으며 단독 또는 혼합하여 사용하였다. 세포 생장은 glutamate배지에서 가장 느렸으며 glutamate-malate 혼합배지에서 가장 빨랐다. acetate와 glutamate를 혼합 하였을 때는 두 가지를 단독으로 사용했을 때보다 월등히 빠른 생장을 나타내었다. 대부분의 경우 탄소원을 단독으로 사용했을 때보다 혼합하였을 때 빠른 생장을 나타내었다. 대부분의 경우 탄소원을 단독으로 사용했을 때보다 혼합하였을 때 빠른 생장을 나타내는 것으로 보인다. 색소가 없는 R.rubrum은 혐기적으로 광을 조사하였을 때 bacteriochlorophyll과 carotenoid를 탄소원의 종류에 관계없이 동시에 형성하였으며 bacteriochlorophyll 비함량은 alanine 배지와 glutamate-alanine 혼합배지에서 가장 높고, carotenoid 비함량은 malate 배지와 malate-alanine 혼합배지에서 가장 높아서 두 색소의 비함량에 대한 탄소원의 영향은 다르게 나타났다. 탄소원에 따른 생장량과 색소 함량은 반드시 일치하지 않았고 색소 형성이나 생장에 있어서의 효과는 탄소원의 종류에 따라 달랐다. 세포내 bacteriochlorophyll에 대한 carotenoid의 비함량비는 다소 변화가 있으나 대개 1: 1 수준이었다. The influences of organic compounds such as acetate, alanine, glutamate and malate, on the growth and formation of photosynthetic pigments as a sole or mixed carbon sources were tested in a photosynthetic bacterium, Rhodospirillum rubrum. Cells grew most rapidly in culture on glutamate-malate mixtrues and showed slowest growth in glutamate among all cultures.Cells cultured on acetate-glutamate mixtures showed much rapid growth than those on single carbon source separately. Cells cultured on mixed carbon sources generally grew more rapidly than those on each single carbon source, so it seems that mixtures of carbon sources exhibit synergistic effect on cell growth. The for mation of bacteriochlorophyll and carotenoids was initiated simultaneously regardless of the kind of carbon source. The synergistic effect of mixed carbon sources on the formation of photosynthetic pigments of R. rubrum was not shown distinctly. The influence of carbon sources on the growth and formation of photosynthetic pigments were not coincided. The ratios of specific contents of carotenoids to bacteriochlorophyll were about 1 : 2 with some variations according to carbon sources.

남자 중량급 유도선수들의 체지방량 추정에 관한 연구

남덕현,민성호 龍仁大學校 武道硏究所 2004 武道硏究所誌 Vol.15 No.1

The purpose of This study aims to examine prediction of the body fat weight in judo middle weight players. The experiment was conducted on the 30 male judo middle weight players in yong in university. The 3 types of calipers of Harpenden, Skyndex and Lang are used to measure the 4parts, and then I calculated the reliability, the validity and compared the difference in the measurements between the types with the result. The average and the standard deviation of all the result of the experiment were calculated by SPSS v.11.0 for Windows. With the data, I examined the difference of the reliability (represented by Pearson 's r) between the types, and that of validity with the correlation coeffients by a part. As well, I compared the difference of the measurements by a part between the types using the One-way ANOVA. I found out the following through the analysis. First, There is a significant difference in the averge of the repetea measurements of body 4 parts in Harpenden and Lange, Skyndexand Lange. second, The harpenden prediction of the body fat weight calculated from the measurements were as follows: Y=15.982+(Triceps×0.321)+(Front thigh×0.229)+(Subscapular×0.936)-(Abdominal x1.092) Third, The skyndex prediction of the body fat weight calculated from the measurements were as follows: Y=15.610+(Triceps×0.349)+(Front thigh×0.221)+(Subscapular×0.939)-(Abdominal ×5.658) Forth. The Lange prediction of the body fat weight calculated from the measurements were as follows: Y=15.417+(Triceps×0.327)+(Front thigh ×0.196)+(Subscapular×0.851)-(Abdominal×0.950)

안와골파열골절의 임상적 고찰

한승규,안덕선 최신의학사 1993 最新醫學 Vol.36 No.6

PV 전류에 의한 계통연계형 태양광발전시스템의 최대출력 추적제어에 관한 연구

박인덕,성낙규,이승환,이훈구,한경희 명지대학교 대학원 1999 대학원논문집 Vol.3 No.-

A step down chopper and PWM current source inverter is used for the connection between the PV array and the utility. This paper proposes chopper is controlled for the de reactor decrease and PWM current source inverter is controlled to keep the output power at the maximum point for the PV. The PV current only is measured and employed for the power calculation combining the control parameter of the PWM current source inverter.

레미콘製造를 爲한 鋼纖維補强콘크리트의 物理的 特性에 關한 硏究

任昌悳,朴承範 忠南大學校 産業技術硏究所 1987 산업기술연구논문집 Vol.2 No.2

Generally, concrete has some disadvantage in anti-impactness and toughness. There are many methods to increase the characteristic of concrete, but we apply it for the steel fiber reinforced concrete(S.F.R.C.). So this report discuss the fundamental experiment about the Physical properties of S.F.R.C. and manufacturing in batch plant with four kinds of steel fiber and variable condition(w/c ratio, cement content, fiber content). The test results are as follows. 1. It has tendency that the more increase fiber content, the more increase the characteristic. In case of 1% of S.F.R.C. It has multiple compressive strength 1.0∼1.3, flexural strength 1.2∼2.0, anti-impactness 5∼10, toughhess 14.0 times comparing with control concrete. 2. It has a tendency that the more increase fiber content, the more decrease the slump. It also has a limitation about the fiber content because it has a fiber ball during mix when it over 1% of fiber content volume. Therefore optimum fiber content of S.F.R.C. is about 1.0∼1.5% by volume. 3. It has tendency that the more increase the fiber content, the more decrease dry-shrinkage. In case of 1.5% of fiber content, it decrease 30% of dry-shrinkage comparing with control concrete. 4. Manufacturing Workability depends upon the fiber content, kind of steel fiber, but when we apply it 1.0% fiber content in batch plant, there is no problem in manufacturing. 5. Slump loss When we make the 1% of S.F.R.C in batch plant, in appear slump loss and fiber ball at 80 minute and in case of 1.5% of S.F.R.C. we know that fiber ball appear at early time. So we conclude that optimum condition of S.F.R.C. in batch plant are fiber content 1.0∼1.5% and under 80 minute of placing time.

소규모 농업용 저수지의 저류량-용수공급능력 결정에 관한 연구

안승섭,정순돌,이증석,윤경덕,장인수 한국환경과학회 2002 한국환경과학회지 Vol.11 No.12

This study aims at the effective estimation of water supply capacity of small scale reservoir and the proposal of the data which is necessary to establish the water resources management plan of down stream area of the reservoir in the future by comparison and examination about reservoir operation technique for the security of agricultural water in small scale reservoir. The result of flow calculation by Tank model is used for the input data as the inflow data which is needed for the analysis of water supply capacity. Stochastic method, simulation method, and optimization method are used to examine the water supply capacity, and water security amount is compared with each method. From the analyses of water supply capacities by each method, slightly different results are shown in spite of the effort to compare them equally using input data such as inflow data under equal conditions, and the comparison of water supply capacities by each method are follows; linear planning method, and transition probability matrix method in the order of amount from the largest. It is thought that the simulation method in which comparatively reasonable application of the inflow data is possible and is simulated in successive time series dam operation of the three methods used in this study thus, simulation model is proper to estimate the water supply capacity of agricultural small scale reservoir. And it is judged that the heightening of efficiency of water resources utilization according to the development of downstream area of dam may be possible using the upward readjusted water supply amount of 55.18×10^6ton at 95% and 90% supply reliability respectively which are above the planning water supply amount of 50.0×10^6ton when the simulation method is introduced as the standard.

Aspergillus Phoenicis K. U. 175의 Cellulase Activity를 높이기 위한 方案

高聖德,辛昌男 충남대학교 자연과학연구소 1981 忠南科學硏究誌 Vol.8 No.2

In a previous publication the authory reported several results on the most adequate cultural condition (temperature, pH, incubation period) for the cellulase production of A. phoenicis K.U.175. This study investigated the effect of various nitrients, such as nitrogen sources and rhamnose as a sole carbon source and different amounts of pyridoxine to increase the mycelial growth and the cellulase production of the fungus in Czapek's liquid medium. The concentration of crabon to nitrogen source in Czapek's liquid medium has influenced upon the mycelial growth and the cellulase (Avicelase, CM Caso and Salicinase) production of fungus. In case that the concentration of carbon to nitrogen source in Czapek's liquid medium reached to 30:1, NH_4NO_3 exhibited the most effective source of nitrogen of growth of the fungus. In case that the concentration of carbon to nitrogen source in Czapek's liquid medium reached to 6:1, yeast extract, pepton, L-asparagine were excellent nitrogen sources for gowth of the fungus. NH_4C1 as a sole nitragon source in Czapek's liquid medium exhibited the most offective cellulase production in the ratio of ten to one of carbon and nitrogen source. 10㎍ of Pyridoxine/100ml medium exhibited the optimum concentration for the cellulase production of the fungus. The cellulase production of the fungus has reached the maximum level at the phase of logarithmic growth in 3 days after inoculation of A.phoenicis K.U.175.

의사결정단위의 경영효율성평가에 대한 연구

노덕환,한승우 군산대학교 지역개발연구소 2000 地域開發硏究 Vol.12 No.-

건강자본 추계방법론

韓成德 大邱大學校 社會科學硏究所 1999 社會科學硏究 Vol.6 No.4

인적자본은, 물적자본이 장기간에 걸쳐 형성되고 생산성을 높이는 것과 같이, 장기에 걸쳐 형성되어 생산성을 높이는 지식, 기능, 기술이 인간에게 체화된 것을 통칭한다. 이러한 지식, 기능, 기술도 건강이 전제되어야 가능하다는 상식론에 비추어 상술한 인적자본의 구성요소 중 '건강'은 인적자본의 가장 중요한 기초가 된다. 이 글은 벡커(Becker, G. S.)의 인적자본이론을 기초로 발전시킨 그로스만(Grossman, M.)의 건강자본이론을 원용하여 건강자본을 추계하는 이론적 모형을 모색하였다. 즉 건강자본을 한 인간의 건강으로부터 흐르는 효용의 할인된 가치로 규정하고, 연령변화에 따른 이러한 가치차이의 합계를 산출하는 모형을 구성하였다.