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- 저자 : 禹相泰 (검색결과 11 건)
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텅스텐(Ⅴ) - 티오시안산의 치환피리딘 錯物의 合成과 그 性質
禹相泰 대구보건대학 1986 대구보건대학 論文集 Vol.9 No.-
Two types of tungsten(V)-substituted pyridine complexes, such as WO(NCS)₃(x-py)₂ (x-py were pyridim, 2-amim pyridine, 3.5- lutidine and 2-amino-4-picoline) and WO (OH) (NCS)₂(x-py) (x-py were pyridine, α-picoline, 2-amim pyridine and 4-acetylpyridine) have been prepared. The physical properties such as conductances, magnetic moment and spectroscopy of the tungsten(V)-substituted pyridine complexes have been studied. From the results the complexes were paramagnetism and none-ionic complexes. It is found that the tungsten(V) complexes are insoluble in water, alcohol, acetone or dimethyl formormide, etc., and unstable in air atomosphere. From the assignment of the intrared spectra of the tungsten(V)-substituted pyridine complexes, it was shown that tungsten was combined with nitrogen of thiocyanate ligand.
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禹相泰 대구보건대학 1988 대구보건대학 論文集 Vol.11 No.-
In the past the basic role of a college was transmission of knowledge. With the accelerated industrialization and urbanization, the diversified society has required expert knowledge. In consequence, the importance of a college, as a center for the community development, has become fully recognized. The input of characteristies of a community, government policies and external incentives brings about, on the part of a college, the conversion of the factors i n accumulation of technical knowledge, facilities and research functions. This leads to the production of many professionals. The output phenomena happens when the in-service training for members of a community is performed and the researches in a college meet the needs of the community. The harmonious conversion of the input-output mechanism guarantees a college to play an important part in the community development. For this are prerequisite the reflection of the basic needs of citizens in college education, the openness of research facilities, and the social service of collegians. The role of a college will be enlarged when a college offers factors and financial sources of mental and physical development for urban societies: the increase in production and the technology for environmental improvement for rural communities, respectively. A college and a community can go hand in hand through industrial-educational cooperation in finance and manpower supply and demand.
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Rockfill 댐의 Hydraulic Fracturing에 關한 硏究
임희대,우원재,우상태 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.2
The term hydraulic fracturing has been used in the geotechnical engineering literature to describe situations in earth embankment dams where the reservoir water pressure initiates and propagates a cracks. The term has also been used in situations where an existing crack is further widened by the reservoir water pressure. The mechanisms of hydraulic fracturing in the core of rockfill dams that have been proposed to date are quite qualitative and have been postulated in the course of investigations to find the causes of leakage or failures as a results of internal erosion. In this study, the various mechanisms of hydraulic fracturing are outlined and the finite element analyses of 5 representative rockfill dams in Korea were conducted to examine the assumption that hydraulic fracturing occurs in embankment cores when the reservoir water pressure exceeds the total normal stresses. This numerical analyses use the hyperbolic model and its parameters from the conventional triaxial tests. As the results of the analyses, the total normal stresses by FEM exceed the water pressures in most cases which is contray to the fact that the water pressures exceed the total normal stresses by the pressure meters in the case of Soyanggang dam.
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문해은,성준영,이현식,장경익,곽기용,우상태 한국정보과학회 2018 정보과학회논문지 Vol.45 No.2
Recently, the number of cyber attacks using malicious code has increased. Various types of malicious code detection techniques have been researched for several years as the damage has increased. In recent years, profiling techniques have been used to identify attack groups. This paper focuses on the identification of attack groups using a detection technique that does not involve malicious code detection. The attacker is identified by using a string or a code signature of the malicious code. In addition, the detection rate is increased by adding a technique to confirm the packing file. We use Yara as a detection technique. We have research about RAT (remote access tool) that is mainly used in attack groups. Further, this paper develops a ruleset using malicious code and packer main feature signatures for RAT which is mainly used by the attack groups. It is possible to detect the attacker by detecting RAT based on the newly created ruleset. 최근 악성코드를 이용한 사이버 공격이 급증하고 있다. 피해가 늘어남에 따라 수 년간 다양한 방식의 악성코드 탐지 기법들이 연구되고 있으며, 최근 공격 그룹 판별을 위한 다양한 프로파일링 등장하고 있다. 본 논문은 악성코드 탐지가 아닌 특정 악성코드를 사용하는 공격 그룹에 대한 판별을 주목적으로 하며, 판별에 각 공격 그룹이 사용하는 악성코드에 대한 문자열 및 코드 시그니처를 이용한다. 탐지 기법을 구현하기 위해 야라(Yara)를 사용하였으며, 공격 그룹에서 주로 사용되는 원격 관리 도구(RAT, Remote Access Tool)를 대상으로 연구를 진행했다. 또한 탐지율 증가를 위하여 악성코드 패킹 여부 확인 및 해제 기술을 추가하였다. 본 논문은 최근 공격 그룹들이 주로 사용하는 원격 관리 도구를 대상으로 악성코드와 패커의 주요 특징 시그니처를 이용해 룰셋(Ruleset)을 작성하고 작성한 룰셋을 기반으로 원격관리 도구 탐지 및 공격 그룹 판별 가능성에 대해 다룬다.
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혈액투석중인 만성신부전 환자의 사망률에 영향을 미치는 요인부석
김경석(K . S . Kim),김진구(J . G . Kim),우상태(S . T . Woo),서상렬(S . Y . Suh),김향(H . Kim),권영주(Y . J . Kwon),표희정(H . J . Pyo),김용섭(Y . S . Kim),차대룡(D . R . Cha),조원용(W . Y . Jo),김형규(H . K . Kim),김창수(C . S . Kim),박 대한내과학회 1998 대한내과학회지 Vol.54 No.3
Background: Several factors have been influenced to mortality of patients with end-stage renal disease treated with hemodialysis. We performed this study to evaluate the factors influencing to mortality in chronic hemodialysis patients in eight hemodialysis centers. Method: We analyzed retrospectively the demographic characteristics, risk stratification, Kamofsky scale, regularly tested laboratory finding(CBC, Blood chemistry), hospitalization rate, and gross mortality among 150 patients from June, 1994 to June 1996. Results: 1) A total of 150 patients were enrolled, male 91 and female 59 and mean age was about 53 years. 43 patients had diabetes and 107 patients had nondiabetes. The mean duration of hemodialysis was 48.2±24.7 months(range, 9-123months), 2) 82 patients(54.7%) required hospitalization during the 2 year follow-up period and the most common cause of hospitalization was cardiovascular disease. 3) A total of 43 patients(28.7%) had been died during the 2 year follow-up period and the most common cause of death was cerebrovascular disease. 4) In univariate analysis, advancing age, Kamofsky scale(<80 points), diabetic nephropathy as the underlying cause of ESRD, comorbid illness, high risk group in risk stratification, total HD duration, HD length per week, low serum albumin and creatitine concentration were all associated with significantly increased risk of death. In multivariate analysis, diabetic nephropathy as the underlying cause of ESRD and low serum albumin concentration were more highly associated with death probability. Conclusion: We conclude that diabetic nephropathy as underlying cause of ESRD and serum albumin concentration are more important elements in determining patient mortality.
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