A STUDY ON THE RISK PROTECTION OF THE MOLD TRANSFORMER

Chung,Young-Ki,Jung,Jong-Wook,Kim,Jae-Chul,Kwak,Hee-Ro,Lee,Su-Kyung 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-

This paper investigates and analyzes the installation and failure status of mold transformer being used in domestic subways and describes the extinguishing process by time through the combustion test of winding part of mold transformer. Condition of installed mold transformers and classes of fire were surveyed and the mold transformer was burned in a horizontal heating furnace. It was confirmed that the mold transformer is self extinguishing and nonflammability. According to this results, the suitable standard of fire protection for the mold transformer was demanded after review of domestic and abroad law. It is expected that the cost of fire protection equipment can be reduced by using the status and combustion test result of mold transformer.

바나나 과실 함유탄닌이 소화효소 작용에 미치는 영향

정정한,류충호,조영수 東亞大學校附設遺傳工學硏究所 1997 遺傳工學硏究 Vol.- No.4

바나나 과실을 시중에서 구입하여 미숙과실과 황숙과실로 구별하고 이것을 과육부분과 과피부분으로 나누어서 동결건조 및 열풍건조시켜 실험 시료로서 사용하였다. 탄닌 함량을 분석한 결과 황숙과실 보다도 미숙과실에서 높았으며, 과육보다는 과피에서 열풍건조 보다는 동결건조시킨 시료에서 높은 경향을 나타내었다. 탄닌의 분획은 Sephadex LH-20칼럼을 사용하여 분획하였다. 바나나 과실에서 함유하고 있는 탄닌은 prodelphinidin, procyanidin을 구성단위로 하는 proanthocyanidin류의 축합성 탄닌으로 이러한 탄닌은 소화효소인 trypsin(EC 3. 1. 1. 3), α-amylase(EC 3. 4. 21. 4), lipase(EC 3. 2. 1. 1)에 대하여 in vitro에 있어서 저해작용을 가지고 있는 것이 확인되었으며 또한 탄닌은 중합도가 높을수록 저해율이 높다는 것이 확인되었다. It has been shown that tannins have adverse effects on growth of animals and feed utilization. Tannins are usually classified into hydrolyzable and condensed types but the adverse effects are more marked in condensed tannin in hydrolyzable tannin. Furthermore, the principle condensed tannins found in banana fruits are pro types by the polymerization of flavan-3, 4-diols either alone or in combination with other flavonoids such as catechins. Tannin of the investigated banana(Banana;Musa sapientum LINN)fruits was fractionated into four or five molecular forms, according to the degree of polymerization by chromatography on a column of Sephadex LH-20. The protein-precitating capacity of the fraction noted tannins increased in degree polymerzation. The inhibitory effect of tannins on trypsin(EC 3. 4. 21. 4), α-amylase(EC 3. 2. 1. 1) and lipase(EC 3. 1. 1. 3) activities in vitro also increased with the increased in degree of polymerization.

극한 환경 MEMS용 3C-SiC 박막의 결정 특성

정수용,정연식,류지구,정귀상,Shigehiro, Nishino 경북대학교 센서기술연구소 2002 센서技術學術大會論文集 Vol.13 No.1

만성 정신분열병 환자에서 지연성 운동장애와 음성증상 및 인지기능 장애와의 연관성

심주철,반철식,성기수,이정구,정도운,정청,윤진상,김영훈 대한신경정신의학회 2000 신경정신의학 Vol.39 No.4

연구목적: 정신과 전문병원에 입원해 있는 만성정신분열병 환자들을 대상으로 첫째 지연성 운동장애의 유병율과 위험인자들을 조사하고, 둘째 지연성 운동장애와 정신분열병의 음성증상 및 인지기능 장애와의 상관성을 조사하고자 한다. 방법: 연구대상자는 마산동서병원에 입원 중인 환자 중 DSM-IV의 정신분열별 진단기준에 부합하며, 최근 3개월 이상 동일 용량의 항정신병약물 복용한 271명(남자 174명, 여자 97명)의 환자들이었다. 지연성 운동장애에 대한 평가는 Abnormal Involuntary Movement Scale(AIMS)을 이용하였고, DSM-IV와 Sc-hooler와 Kane(1982)의 진단기준 양자에 부합하는 환자들만을 지연성 운동장애군으로 분류하였다, 정신 분열병 정신병리에 대한 평가는 Brief Psychiatric Rating Scale(BPRS)와 Schedule for the Deficit Syndrome(SDS)을 이용하였고, 인지기능에 대한 평가는 Mini-Mental Status Examination(MMSE)을 이용하였다. 결과: 지연성 운동장애의 유병율은 50.9%이었고, 50세 이상, 남자에서 높았다. 그러나 입원기간과 항정신병 약물의 일일 사용량에 따른 차이는 없었다. 지연성 운동장애의 호발부위는 혀, 상지, 입술과 입 주위의 순이었다. BPRS 총점 및 소항목 척도점수와 SDS 척도점수는 지연성 운동장애의 유무에 따른 차이가 없었다. MMSE 총점 및 소항목 점수도 지연성 운동장애의 유무에 따른 차이가 없었다. 결론: 평균입원기간이 9년 이상인 만성정신분열병 환자들에게서의 지연성 운동장애의 유병율은 50.5%이었고, 연령이 가장 의미있는 위험인자임을 확인했다. 만성정신분열병 환자들이 주 대상인 본 연구에서는 지연성 운동장애와 정신분열병의 음성증상 및 인지기능 장애와의 상관성은 입증하지 못했다. Objectives: The purpose of present study was to determine the prevalence rate of tardive dyskinesia and to search for its risk factors in chronically institutionalized schizophrenic subjects. We also examined the relationship between tardive dyskinesia and both negative symptoms and cognitive impairments in the same subjects. Methods: Subjects were 271 in-patients(174 males, 97 females) at Masan Dongsuh Hospital. They met DSM-IV criteria for schizophrenia and had been taking fixed doses of antipsychotics for at least 3 months. Tardive dyskinesia was assessed by Abnormal Involuntary Movement Scale(AIMS). Cases of tardive dyskinesia were ascertained by the criteria of Schooler and Kane (1982) and DSM-IV. The rating of psychopathology was acquired using Brief Psychiatric Rating Scale(BPRS) and Schedule for the Deficit Syndrome(SDS) and the assessment of cognitive function using Mini-Mental State Examination(MMSE). Results: The prevalence of tardive dyskinesia is 50.9% and the frequency of tardive dyskinesia was high est in male above the age of fifty. But there was no statistically significant relationship between the frequency of tardive dyskinesia and both the length of hospitalization and the daily dose of antipsychotics. The frequency order of abnormal movement in the patients with tardive dyskinesia was as follows : tongue, upper extremities, lips and perioral area. We couldn't find any significant difference in the total and subscale scores of BPRS between the groups with and without tardive dyskinesia. There were no differences in MMSE scores between the groups with and without tardive dyskinesia. Conclusion: This study gave us that the prevalence of tardive dyskinesia was high in chronically institutionalized schizophrenic inpatients and that age was the most significant risk factor of tardive dyskinesia. The relationship between tardive dyskinesia and both negative symptoms and cognitive impairment, however, was not revealed.

가능성과 필연성에 기반을 둔 러프집합을 이용한 BP 학습알고리즘

정환묵,피수영 대구효성가톨릭대학교 응용과학연구소 1998 응용과학연구논문집 Vol.6 No.2

This paper presents an learning algorithm of neural networks that uses rough sets about discriminant problems for pattern recognition. We propose a discriminant analysis applied possibility and necessity using rough sets for two group discriminant problems. Therefore we propose an learning algorithm of neural networks where the existence of a boundary area is assumed.

부산의 소상공인 특성과 성공요인에 관한 연구

정수원,서근하 東西大學校 2001 동서논문집 Vol.7 No.-

Micro-business could be defined as the relatively small firms among the SMEs (Small and Medium Enterprises). Even if their role is so important in their social and economical achievements, till recently, Korean market structure has been so harsh for their successful operation due to the biased favors for the big enterprises. The turning point for the favorable consideration on the micro-business came out with the augmentation of the 50 centers of SBDC(Small Business Development Center) nationwide under the Small Business Administration in February of 1999. The purpose of the center is to help the creation and development of the micro-business through consulting as well as the financial support. Since the opening of the international sea port in 1876, Pusan had been taken the major role of the economic development of Korea, especialy in fields of clothing and woods industries based on the well accommodated infra structure of the city. But, the political change toward the heavy and chemical industries had resulted in the long-term of the stagnation of the Pusan throughout 1970s till 1990s. Currently, the unemployment rate of Pusan is 6.4%, the highest level of the country. It motivated the emphasis of the policies toward the creation of the new ventrue style of the firms to decrease the unemployment rate. The purpose of this study is to analyse the subjective factors for the success in the micro-business by the field study and thus suggest the political considerations and some alternative directions.

21세기 세계경제센터로서의 ASEAN의 역할

鄭守源 동국대학교 경제경영연구원 무역연구부 1997 國際貿易硏究 Vol.21 No.2

중소기업의 인력확보를 위한 구조개선 방안

정수원,서근하 동서대학교부설연구센터 2001 연구센터논문집 Vol.4 No.1

In Korea, the industrial structure is, in major, based on the vertical relation between big companies and Small and Medium Enterprises ('SMEs'). Due to this kind of tight relation in supply chain management, the managerial difficulties of the SMEs could not separate from the major strategies of the big companies. In order to stabilize the vertical relation in production, therefore, the more foreseeable and transparent managerial innovation in the big companies side is much more required. In fact, SMEs are critically important in the national economy in that they took the 74.4% of the total labor force and have expanded their role in the national production and value-added activities. However, SMEs face too many difficulties to survive in the big company-oriented structure. Among these difficulties in SMEs, lack of enough fund for the investment and the bottleneck in labor supply require the most outstanding remedies right away. SMEs could not allow enough salary like big companies and thus, could not get the supply of the productive labor force. The problem may lie in the short of the information and poor marketing activities. Among the difficulties faced by the SMEs, the most important factor is the structural discrepancies in the labor market between the demand and supply and thus, this paper is aimed to solve this discrepancies in labor supply.

厚膜化 ZnO가스 檢知素子의 製造및 그 特性

鄭守泰,柳志久 釜山工業大學校 1981 論文集 Vol.22 No.2

ZnO 와 Cr₂O₃의 混合母材에 Pt, 씨리카졸을 첨가한 가스 檢知素子를 厚膜技術에 의하여 製造하였다. Pt 0.5wt% , 씨리카졸 10wt% 정도 첨가할때 感度가 向上되었으며 최저 燒結條件은 空氣中 800℃에 1시간, 素子에 유지되는 최적 溫度는 320℃ 부근이었다. 제조된 素子들은 ?? 가스에 높은 感度을 보였다. ZnO and Cr₂O₃ based Gas sensor were manufactured by using of thick-film technology and their characteristics were investigated. Adding about 0.5wt% Pt, 10wt% Silicasol to the mixing of ZnO and Cr₂O₃improved sensitivity. The optimum fired condition was about 1 hr, 800℃ in air and heating temperature of thick-film Gas sensor was about 320℃. Thick-film Gas sensor showed a good sensitivity for ?? Gas.

ZnO 세라믹 바리스터의 電位障壁

鄭守泰 釜山工業大學校 1983 論文集 Vol.24 No.2

The potential barrier of grainboundary is very important in ZnO ceramic varistors and other polycrystalline semiconductors. The general conduction mechanism of ZnO Ceramic varistors is analized by them. In this paper, I used the current transport equation and calculated by the log (G·k·T/q)-1/T curve obtained from J-V data. This method was more useful than 1/C²-V curve and the potential barrier height of grainboundary was 0.76[eV].