Urban Entertainment Center 사업과 지역경제의 파급효과 분석

주수현,허정옥,진금옥,강상주 동의대학교 경제경영전략연구소 2006 經濟經營硏究 Vol.4 No.1

This research is designed for conducing spreading effects of regional economy by analyzing Input-Output Model(i.e. production model, employment model, value model, and income model). These measures of spreading effects in regional economy were determined by precise analyses of feasibility and demands of public businesses. That would be effective and confident polices and supportive for long time in the regional ecinimy. One of the most effectibe analysis on the spreading effects of regional economy is draw up Input-Output Model(IOM). This article, based on 2000 IOM of Busan Area, is focused that how the turbulence level of final demands affected spreading effects of regional economy, such as industrial production, value added, employment, incom etc. Also there were included the analysis of economic analyses of spreading effects on the UEC in the Centum City businesses.

배전 자동화 시스템의 연계방식에 관한 연구

최창주,조금배 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.1

The automation system of distribution needed to seperate with quick response for the reliability coefficient in electric power transmission which interruption of service and breakdown This paper obtained the plan of the operation on power distribution system by automated distribution systems, and then transmission line and component of distribution automation system are analyzed for the remote supervisor control function. system configuration and its technological fesibility to distribution automation system. And it will be based for improvement of grid connecting distribution automation system.

디지털 제어에 의한 단상유도전동기의 범용 기동기 설계

최창주,서강성,박수강,조금배,백형래,임병옥 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2

Single phase induction motor(SPIM) is one of the most widely used type of low power AC motors in the world, especially for domestic or commercial applications where a three phase power supply is not available. Fractional horse power single phase induction motors have no starting torque their own. So there are several ways of starting single phase induction motors. The most common type is the starting capacitor installed in series with the auxiliary winding to increase the starting torque. Also, the auxiliary winding is disconnected once the speed of the motor reaches 70 to 80% of the rated speed. In the conventional systems, this function is conducted by a centrifugal switch. But the mechanical centrifugal switch has many problems such as switch malfunction. This paper presents the new methods of universal starting switch by digital controller to overcome these shortcomings of centrifugal switch.

SOFC NiO/YSZ 양극재료의 전기적인 특성

최창주,조금배,김남오,장성남 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2

Ultrafine NiO/YSZ composite powders were prepared by using a GNP(glycinenitrate process) for anode material of solid oxide fuel cells. The specific surface areas of synthesized NiO/YSZ composite powders were examined with controlling pH of a precursor solution and the content of glycine. The binding of glycine with metal ions occurring in the precursor solution was analyzed by using FTIR. The characteristics of synthesized composite powders were examined with X-ray diffractometer, a BET method with N_(2) absorption, scanning and transmission electron microscopies. Strongly acid precursor solution increased the specific surface area of the synthesized composite powders. This is suggested to be caused by the increased binding of metal ions and glycine under a strong acid solution of pH=0.5 that lets glycine consist of mainly the amine group of NH_(3)^(+) After sintering and reducing treatment of NiO/YSZ composite powders synthesized by GNP, the Ni/YSZ pellet showed ideal microstructure very fine Ni particles of 3~5㎛ were distributed uniformly and fine pores around Ni metal particles were formed, thus, leading to an increase of the triple phase boundary among gas, Ni and YSZ.

태양전지 어레이의 전기적 출력특성

최창주,오금곤,조금배 조선대학교 동력자원연구소 1996 動力資源硏究所誌 Vol.18 No.1

Recently, the environmental load has rapidly increased with the burgeoning of world population and the great expansion of severe global environmental issues. Therfore, it is inevitable to develop technology to ensure a stable clean energy source to replace oil as well as energy saving technology. Under these circumstances, photovoltaics (elecric power generation directly from sun light using solar cell) have attracted world-wide attention because of its cleaness. This paper reviews photovoltaic measurements on the refernce conditions and reference cell mothod and studies photovoltaic devices on the performance measurement and evalution procedures. Especially, activation of the photovoltaic researches and industrialization are emphasized in this paper.

항정신병약물을 처음으로 사용하는 초발 정신증 환자에서 나타나는 체중 및 대사성 지표의 변화 : 후향적 연구

김우진,심주철,공보금,강제욱,문정준,김정은,김민걸,박민경,김성진,김현정,정도운 대한생물치료정신의학회 2011 생물치료정신의학 Vol.17 No.2

Objectives:This study was to identify weight & metabolic changes in first-episode psychotic patients with antipsychotics use and investigate the differences of weight & metabolic changes between first-episode psychotic patients and controls with antipsychotics use. Method:In this retrospective study, twenty eight first-episode psychotic patients and twenty eight controls with schizophrenia, schizoaffective or bipolar disorder defined by DSM-IV criteria were included. Information about demographic and clinical characteristics of the subjects was gathered from the medical records. Also body weight, sBP, dBP, fasting glucose, lipid profile and WBC count were evaluated before and after antipsychotics use. Rogistic regression was conducted to assess factors associated with weight gain. Results:First-episode psychotic patients showed more weight and BMI changes than controls after antipsychotics use, and these changes continue over 12 months. On the other hand, there were no significant factors associated with weight gain. Conclusion:The results of present study suggest that antispychotics is one of the major causes inducing weight gain of psychotic patients and antipsychotics-induced weight gain is more vulnerable to drug-naive first-episode psychotic patients.

15 kVA급 저항형 초전도 전류제한기의 전류제한특성

최효상,최창주,이상일,정수복,오금곤 조선대학교 에너지.자원신기술연구소 2004 에너지·자원신기술연구소 논문지 Vol.26 No.1

We investigated resistive superconducting fault current limiters (SFCLs) fabricated using YBCO thin films on 2-inch diameter sapphire substrates. Nearly identical SFCL units were prepared and tested. The units were connected in series and parallel to increase the current and voltage ratings. A serial connection of the units showed significantly unbalanced power dissipation between the units. This imbalance was removed by introducing a shunt resistor to the firstly quenched unit. Parallel connection of the units increased the current rating. An SFCL module of 4 units in parallel, each of which has minimum quench current 25 A_(peak), was produced and successfully tested at a 220 V_(rms) circuit. From the resistance increase, we estimated that the film temperature increases to 200 K in 5 msec, and 300 K in 120 msec. Successive quenches revealed that this system is stable without degradation in the current limiting capability under such thermal shocks as quenches at 220 V_(rms).

粉末 回折法을 위한 結晶面의 多重度因子 計算

徐日煥,趙成浩,金光柱,秋錦洪,李珍昊 충남대학교 1991 忠南科學硏究誌 Vol.18 No.1

같은 面間距離롤 갖는 한 面形인 다른 面들의 數로 定義 되는 多重度因子는 紹末回折賽驗에서 理論的인 强度計算을 위한 6個 因子 中의 하나이다. 이 論文에서는 各 Laue群에 대한 面 變換行列을 誘導하여 그 群에 있는 等價面 計算에 사용하였다. 各 Laue群에서 14가지 다른 種類의 面들의 多重度는 等價面들로부터 얻어질 수 있으며 그들을 한 表로 합하여 놓았다. The multiplicity factor, which may be defined as the number of different planes in a plane form having the same spacing, is one of the six factors for the theoretical intensity calculation in powder diffraction experiment. In this paper, the plane transformation matrix for each Laue group was derived and the matrix was used for the calculation of the equivalent planes in the group. The multiplicity factors for the fourteen different kinds of planes in each Laue group were able to obtain from the equivalent planes and they were summarized in a table.

센서구동 방식에 의한 태양추적 시스템

박정국,최연옥,조금배,최창주 조선대학교 에너지.자원신기술연구소 2004 에너지·자원신기술연구소 논문지 Vol.26 No.2

Nowaday, almost of practical energy comes from the fossil fuel, such as coal, oil and gas. But those methode causes the environmental pollution. Photovoltaic systems are considered as a alternative energy source to overcome the shortage of electricity in the future. Photovoltaic system is easier to operate and maintain than the other power generating system since it generally contains no moving parts, operate silently and require very little maintenance. In this paper, it is proposed 150[W] solar tracking system, the system designed as the normal line of the solar cell always runs parallel the ray of the sun. This design can minimize the cosign loss of the system.

유전알고리즘을 이용한 배전손실 최소화에 관한 연구

최대섭,이상일,오금곤,정수복,김창석 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.2

This paper presents a new method which applies a genetic algorithm(GA) for determining which sectionalizing switch to operate in order to solve the distribution system loss minimization re-configuration problem. The distribution system loss minimization re-configuration problem is in essence a 0-1 planning problem which means that for typical system scales the number of combinations requiring searches becomes extremely large. In order to deal with this problem, a new approach which applies a GA was presented. Briefly, GA are a type of random number search method, however, they incorporate a multi-point search feature. Further, every point is not is not separately and respectively renewed, therefore, if parallel processing is applied, we can expect a fast solution algorithm to result.