다수의 냉동시스템에 의한 저온 저장고의 에너지 성능평가

강동언,김성만,운종호,이의준,박영하,현명택 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.1

The cool storage system(CSS) is a specific building that is required only cooling load without heating during the whole year. CSS uses a electric energy which is very expensive and is required much amount of energy due to temperature differences between interior and ambient temperatures. The purpose of this study is to assess the energy performance of the multi-unit cooler operating control system. For the prediction of its performance, two types of test (KIER). First cell is equiped with one .are installed a t Korea Institute of Energy Research large unit cooler. and second cell consists of two small unit coolers. According to the results of experiments using these cells. the multi-unit cooler operating control system is found to be effective in energy saving and beneficial for storage due to much less deviation of temperature.

품질분임조활동에 대한 의식구조분석

강성수,박영만,황승국 경남대학교 신소재연구소 1996 論文集 Vol.7 No.-

이 논문은 퍼지구조모델링법을 이용하여 품질분임조활동에 대한 의식구조분석을 하는 방법을 제공한다. 퍼지구조모델링법은 의식구조를 모델링하는 방법으로, 이 방법은 인간의 주관적인 판단의 일대비교의 회수가 많고, 판단에 대한 정도라고 할 수 있는 정합성을 체크하기 어렵다. 따라서, 본 논문에서는 계층화의사결정법에서의 일대비교행렬의 개념을 도입하여 퍼지구조모델링법으로서 의식구조를 분석하였다. This paper provides a method of consciousness structure analysis for quality circle activity using fuzzy structural modeling. Fuzzy structural modeling. which is a modeling method for consciousness structure, has a large number of pairwise comparison by human subjective judgement and is difficult to check the consistency index of denoting the precision for human judgement. Thus, in this paper. we analyzed the structure of consciousness by fuzzy structural modeling method. introducing the concept of pairwise comparison matrix in Analytic Hierarchy Process.

생쥐 2-세포기 수정란의 초급속동결

강만종,이철상,한용만,유대열,이경광 제주대학교 농과대학 제주도축산문제연구소 1991 畜産論叢 Vol.6 No.1

This study was carried out in order to investigate eggects of cryoprotectant concentration and equilibration time on survival of ultrarapidly frozen 2-cell mouse embryos Mouse 2-cell embryos. fol-lowing dehydration by exposure to DMSO and sucrose. were directly immersed into liquid nitrogen and thawed in 37℃ water. Viability was defined by development rate to the blastocyst stage after in vitro culture for 72 hours. The results are summarized as follows ; 1. When 0.25M of sucrose was added into the freezing medium a t various concentrations of DMSO and dilution medium, higher development rate of embryo was obtained in 3.0M DMSO conentrations (82.6%). However, When sucrose concentrations of 0.25 and 0.5M were added to the freezing medium with 3.0M DMSO and dilution medium, development rate of embryos were 81.7% and 24.1%, respectively. 2. In the equilibration time at room temperature, higher development rate was attained after short period of time(2.5min) in 3.0M DMSO +0.25M sucrose(85.9%). 3. The development rate of embryos at in vitro 2-celL in vivo 2-celL solution control and untreated control was 84.6%, 90.9%, 89.9%. and 89.7%. respectively.

시간-주파수 분포를 이용한 레이다 신호해석 및 처리에 관한 연구

강상만,김중규 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.2

본 논문에서는 Time Frequency Distribution(TFD)을 이용한 새로운 레이다 신호처리 알고리즘을 제시한다. 신호를 시간과 주파수 영역에 대해서 동시에 해석하는 방법입 TFD를 이용하여 레이다 신호처리의 궁극적인 목표인 time delay(range)와 frequency shift(velocity)를 찾아내는 것이 그 목적이다. 능동적 레이다의 경우, 레이다 신호의 특성상 송신신호에 대한 정확한 정보를 가지고 있다는 점에 착안하여 송·수신 신호간에 correlation을 취한 새로운 신호에 대해서 TFD를 취해 주는 Correlated TFD(CTFD) 알고리즘을 제안한다. CTFD알고리즘을 통해서 전파의 송·수신 경로에 더해지게 되는 잡음성분의 영향을 감소시키는 효과를 얻을 수 있다. 따라서 보다 정확한 detection이 가능하게 된다. 그러나 TFD는 많은 계산 과정을 필요로 하기 때문에 현재의 기술로는 실시간 처리가 어려운 상황이다. 그래서 실시간 처리를 위한 방법으로 correlation과 TFD를 병행하여 time delay와 frequency shift를 독립적으로 찾아내는 보다 빠른 알고리즘 또한 제시한다. 본 논문에서 제시한 알고리즘의 타당성을 보이기 위해 -30dB ∼ 30dB 까지의 SNR을 갖는 additive white Gaussian noise(AWGN) 상황을 가정하여 기존의 방법과의 비교를 통한 실험결과를 제시한다. We propose a new algorithm for radar signal analysis and processing using the Time Frequency Distribution(TFD) by which the radar signal can be analyzed both in time and frequency domains simultaneously. The objective is to estimate the time delay and frequency shift between the transmitted signal and. the received signal, which is the typical goal of a radar system. The proposed algorithm is a Correlated TFD(CTFD) in the sense that it computes the time -frequency distribution of the cross-correlation between the transmitted and the received signals. Here, we consider an active radar system for which the signal characteristics are completely known a priori. By taking the TFD of the cross -correlation function rather than the radar signal itself, the effect of channel noise could be reduced significantly. One of the drawbacks for TFD method is that it involves a lot of computations, and thus can hardly be implemented in real time. To achieve the desired goal, i.e. estimation of time delay and frequency shift, in less time than the conventional TFD method, we propose a modified processing scheme which independently implements the correlation and the TFD methods for estimating the time delay and the frequency shift respectively. Finally in order to show the feasibility of our proposed scheme, we give some numerical results for an additive white Gaussian noise(AWGN) environment where the signal to noise ranges from -30 dB to 30 dB, and compared the result with conventional TFD methods.

濟州 開發과 言論

姜通源,金性滿 제주대학교 1973 논문집 Vol.5 No.-

If mass communication has not the extensive and speedy quality of system, the economic activities of men, in an important industrial country, will not be appropriately worked. In other words, according as the countries and their societies have been transmuting for the better from the pattern of traditional society to modernized one, also communication has been developed with great expectation. On the whole the political, economic, social, and cultural developments, that be able to mention about themselves as part of national prosperity, have brought the growth of communication; at the same time, we know, the growth of communication has been the cardinal factor and the motive power of such like developments. The iteraction described aboe, we consider, will be generally applied to the development of a regional community. That is to say, there we find some close relation between mass communication and other elements concerning to the development of the community. If we dilate upon this problem, we can say that the interaction is not an exception, too, in the case of researching for the development of Cheju-Do. Therefore, in this study, we have attempted to deal with the problems for the purpose of finding out the mutual relation between mass communication and the development of Cheju-Do community. And the main points that we have treated in this article are as follows. 1. Introduction 2. The actual condition of Cheju regional development and its future prospect 3. The interaction between the development and mass communication of Cheju-Do 4. The actual condition of mass communication of Cheju-Do 5. The function of mass communication for the development of Cheju-Do 6. Conclusion

다수의 냉동시스템에 의한 저온 저장고의 에너지 성능평가

김성만,윤종호,박영하,이의준,강동언,현명택 제주대학교 산업기술연구소 2000 尖端技術硏究所論文集 Vol.11 No.1

The cool storage system(CSS) is a specific building that is required only cooling load without heating during the whole year. CSS uses a electric energy which is very expensive and is required much amount of energy due to temperature differences between interior and ambient temperatures. The purpose of this study is to assess the energy performance of the multi-unit cooler operating control system. For the prediction of its performance, two types of test cell are installed at Korea Institute of Energy Research (KIER). First cell is equiped with one large unit cooler, and second cell consists of two small unit coolers. According to the results of experiments using these cells, the multi-unit cooler operating control system is found to be effective in energy saving and beneficial for storage due to much less deviation of temperature.

급냉 제강슬래그를 잔골재로 사용한 차폐콘크리트의 공학적 특성에 관한 실험적 연구

강기웅,조성현,정원섭,권기주,김진만,김무한 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

The steel slag, a by~product which is produced during the manufacture of steel by refining pig iron, is mainly used as road materials after aging it. It is necessary to age steel slag for long time in air because the reaction with water and free-CaO in steel slag could make the expansion of volume. This problem prevents steel slag from being used as aggregate for concrete. However, steel slag used in this study was controled by a air-jet method which rapidly cools substance melted at a high temperature. The rapid-chilling method prevents from generation of free-CaO in steel slag. The rapid-chilled steel slag is similar to be spherical shape and has the heavier specific gravity than natural aggregate. Therefore, it could be used to manufacture radiation shielding concrete as fine aggregate. This paper investigated the engineering properties of radiation shielding concrete when using rapid-chilled steel slag as fine aggregate. As results of this study, the increase of use of rapid-chilled steel slag decreased the desirable water content of concrete but developed the rate of radiation shielding of concrete. The strength of concrete using it is similar to that of concrete using river sand.

韓國産 미꾸리에 關한 育種·繁殖學的 硏究 : Ⅵ. Histological Changes of Pituitary Gland and Oocytes from March to May Ⅵ. 계절에 따른 암컷의 腦下垂體와 卵母細胞의 組織學的 變化

姜京來,盧淳昌,尹鍾萬,朴弘陽,李相鎬 건국대학교 동물자원연구센터 1993 動物資源硏究誌 Vol.18 No.-

1992년 3월부터 1992년 5월까지 자연적인 채광상태에서 溫度를 유지시킨 후 채취된 미꾸리 암컷의 腦下垂體, 肝 및 卵巢 組織의 번식주기에 일어나는 미세구조의 변화를 광학 및 투과형 전자현미경을 이용하여 살펴보고, 이것들의 相互 聯關性을 알기 위하여 본 연구를 실시하였다. 본 연구에서 얻어진 결과는 다음과 같다. 성숙된 개체의 뇌하수체는 수많은 작은 분비과립과 커다란 분비구 및 불규칙한 형태의 과립들이 관찰되었다. 핵소체가 핵막 주변에 위치헤 있는 후기 단계(LMO)의 난모세포가 난황이 축적되는 성숙초기 단계(EMO)의 난모세포로 변형되는 시기를 난황의 형성이 개시되는 시기로 본다. 난모세포가 성장함에 따라 핵소체의 크기와 난황과립의 수가 증가하게 된다. 난황과립은 결정상의 과립으로 난세포질에 치밀하지 않은 상태로 축적된다. 성숙초기(EMO) 및 말기단계(LMO)에 난소는 커지고 투명하며 과립형태로서 색깔이 연노란색을 나타낸다. 따라서 난 내부를 쉽게 관찰할 수 있다. 방사대(ZR)는 성숙초기단계(EMO)에 단층으로부터 입방형태로 변화된다. 과립막 세포와 난모세포로 부터 유래된 미세융모는 난황형성이 진행되는 동안에 성장하게 되며, 방사대의 pore canals의 구멍을 통해서 서로 연결되어 있다. 따라서 외부로부터 물질의 이동이 있게 된다. 난모세포가 완전하게 성숙되어 방사대가 단단해 지면 미세융모는 그 기능이 상실된다. This study was undertaken to understand the development stages of pituitary gland, liver and ovary of Korean loach(Misgurnus anguillicaudatus) under natural circumstances from March to May 1922. Expecially, the light microscopic and ultrastructural changes of ooplasm and follicular membranes of oocytes, were observed by light and transmission electron microscope during the reproductive cycle. In pituitary gland of mature individuals, there were observed a number of secretory granules,large globules, and irregular masses.The vitellogenic phase began as these late perinucleolus oocytes became transformed into early maturing oocytes through the accumulation of yolk. The size of the nucleoli and number of the yolk granules increased as the oocyte growed. Yolk granules were loosely deposited in the oocyte as crystalline granules. Due to the presence of early and late maturing oocytes, their ovaries were enlarged transparent, granular and yellowish in color. Zona radiata change a squamous into cuboid shape in EMO stage. Microvilli from the granulosa cells and from the oocyte grow and make contact with each other in the pore canals of the zona radiata during vitellogenesis, but are withdrawn as the zona radiata becomes more compact during oocyte maturation.

신도시 중심지계획에 나타난 거점공간조직에 관한 연구

김태만,강상훈,심우갑 대한건축학회 2004 대한건축학회논문집 Vol.20 No.9

With an introduction of a new terminology, 'anchor system', this study aims to find out how anchor system of CED is applied to new town planning 10 Korea. Based on theoretical researches, we defined 'anchor' as 'facilities or districts which are concentrated In CBD with key functions to boost the development of Its neighborhood And 'anchor system' IS a urban fabric organized With anchors 10 CBD In case study, SIX different cases of new town planning In Korea Since the late 1980s were analyzed, urban spatial configurations of anchor system were studied together with Its functions, establisher, establishing dates, etc The result of the study showed that department stores, broadcasting stations, convention centers, and public offices were utilized as anchors including subway stations and open spaces Depending on situations of neighborhood areas of new towns and financial status of their establishers, anchors were applied at different times, sometimes at early stages, sometimes at final stages But It must be point out that most anchors Which established at early stages were developed by public sector Compared to early cases which have weak network of anchors and no plan for serial development of anchors, recent cases show more tight network of anchors and integrated anchors

말초혈액 내 백혈구수와 대사증후군과의 연관성

황상태,김범수,황상준,서정열,김병진,이원영,성기철,강진호,김선우,이만호,박정로 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.3