녹농균의 Exoenzyme 산생능 및 임상검체별로 본 항균제 감수성

최병주,조양자,Choi, Byung-Zoo,Cho, Yang-Ja 대한미생물학회 1981 大韓微生物學會誌 Vol.16 No.1

The Pseudomonas infection has been increased in incidence and suspected as a cause of opportunistic pathogen. Protease and elastase produced by Pseudomonas aeruginosa are reported to be closely associated with pathogenicity of Pseudomonas aeruginosa. We examined, in this work, the relationship between production of exoenzyme of Pseudomonas aeruginosa and susceptibility to antimicrobial agents in view of possible application to the management of Pseudomonas infection. 1. In 295 Pseudomonas aeruginosa isolated from clinical specimens, 34.6% were from pus, 20.7% from sputum, 15.6% from wound including burn sites and 12.9% from urine. 2. Distribution of protease and elastase production by clinically isolated Pseudomonas aeruginosa, showed that protease and elastase producing strains were 83.1%, protease producing strains were 7.5%, elastase producing strains were 2.0%, and non producing strains were 7.5%. 3. MIC(minimum inhibitory concentration) peak for tetracycline and chloramphenicol were observed at 25mcg/ml and 200mcg/ml respectively, but there were no Pseudomonas aeruginosa which correspond to MIC peak, 6.25mcg/ml. Gentamicin of aminoglycosides was highly susceptible to Pseudomonas aeruginosa clinically isolated from pus, sputum and wound sites, but susceptible to isolates from nasal discharge and urine. Regarding MIC peak of carbenicillin, 100mcg/ml, 81.8% of Pseudomonas aeruginosa were from urine, 54.8% from wound including burn sites, 52.7% from pus, and 50.8% from sputum. 4. Enzyme producing strains showed no susceptibility to kanamycine and carbenicillin at low concentration, but protease producing strains tend to resistant to antimicrobial agents.

Hypoadiponectinemia in Patients With Paroxysmal Atrial Fibrillation

최병주,허정호,In-Soo Choi,Si-Won Lee,Hyun-Soo Kim,이재우,차태준 대한심장학회 2012 Korean Circulation Journal Vol.42 No.10

Background and Objectives: Adiponectin is an adipose tissue-derived hormone that has beneficial effects on cardiac function and has been reported to be associated with lipid metabolism, glucose metabolism, and insulin resistance. Serum levels of adiponectin are reduced in obese individuals compared with non-obese individuals. Obesity is associated with an increased incidence of atrial fibrillation (AF); how -ever, the role of adiponectin in AF is unclear. The aim of this study is to evaluate the relationship between the plasma adiponectin level and AF. Subjects and Methods: Sixty-one consecutive patients were prospectively enrolled for this study. Subjects were divided into two groups:patients with AF (n=30) and controls (n=31). Laboratory evaluation, including levels of plasma adiponectin, was performed and echocardio-graphic parameters were measured. Results: The baseline characteristics were not different between the two groups. The plasma adiponectin level of patients in the AF group was significantly lower than in the control group (14.9 ±7.2 vs. 19.±8.9 µg/mL, p<0.05). In addition, when we divided the AF patients into paroxysmal and chronic AF, the plasma adiponectin level was significantly lower in patients with paroxysmal AF, compared with the control group. In multiple binary logistic regression analysis to evaluate the independent predictors for AF, adiponectin and left atrial diameter were strong independent predictors of AF. Conclusion: In this study a lower plasma adiponectin concentration was significantly associated with that of paroxysmal AF. Hypoadipo -nectinemia can potentially be an important risk factor for AF.

4D BIM 기반의 건설프로젝트 작업공간 계획 프로세스

최병주,이현수,박문서,김현수,황성주,Choi, Byungjoo,Lee, Hyun-Soo,Park, Moonseo,Kim, Hyunsoo,Hwang, Sungjoo 한국건설관리학회 2013 한국건설관리학회 논문집 Vol.14 No.5

Each participant in building construction project requires their own workspace to execute their activities. In this environment, inappropriate workspace planning in construction site causes workspace conflicts which result in a loss of productivity, safety hazard and poor-quality issues. Therefore, workspace should be regarded as one of the most important resources and constraints have to be managed at construction site. However, current construction planning techniques such as Gantt chart, network diagram and critical path method have proven to be insufficient to workspace planning. This paper contains formalized process for workspace planning in 4D BIM environment to prevent workspace related problems in construction project. The proposed process in this paper represents workspace occupation status for each activity and suitable solutions for identified workspace conflicts by integrating workspace attributes and activity execution plan. Based on the result of this study, project manager will be able to prevent probable workspace conflicts and negative effect on project performance by devising appropriate workspace plan during preconstruction phase. 건설프로젝트에서는 다양한 참여자들이 제한된 공간에서 각자의 작업공간을 차지하며 작업을 수행한다. 작업공간에 대한 부적절한 계획은 건설프로젝트의 생산성 감소, 작업 위험 증가 및 품질 저하 등의 문제로 이어지기 때문에 작업공간은 건설프로젝트에서 고려하여야 할 중요한 요소 중 하나이다. 그러나 기존의 건설프로젝트 공사 계획 수립을 위한 방법들은 건설프로젝트에서의 작업공간을 고려하지 못하는 한계가 있었다. 따라서 본 연구에서는 체계적이지 못한 작업공간 계획으로 인하여 발생하는 작업공간 간섭 문제를 예방하기 위하여 4D BIM(Building Information Model) 기반의 작업공간 계획 프로세스를 제안한다. 제안된 프로세스는 각 작업공간의 특성과 공사수행계획을 반영하여 각 액티비티의 작업공간 점유상태를 표현하고 이를 바탕으로 발생 가능한 작업공간 간섭을 발견한다. 또한 각 액티비티와 작업공간의 특성 그리고 공사수행계획 등을 고려하여 발견된 작업공간 간섭에 대한 해결책을 도출한다. 본 연구의 결과를 바탕으로, 프로젝트 관리자는 본 공사 수행 이전에 공사에 필요한 작업공간을 미리 계획함으로써 서로 다른 액티비티 작업공간 사이의 간섭을 예방하고 건설프로젝트에서의 불필요한 손실을 예방할 수 있다.

인공위성 고도계 자료로 추정한 동해 표층해류와 공간분포 변동성

최병주,변도성,이강호,Choi, Byoung-Ju,Byun, Do-Seong,Lee, Kang-Ho 한국해양학회 2012 바다 Vol.17 No.4

이 연구는 인공위성 고도계로 관측한 해수면 높이 자료를 이용하여 동해 표층해류를 생산하고, 동해 전체 영역에 대하여 동시성 있는 표층해류 분포를 동해 해류 정보 사용자에게 제공하기 위한 최초의 시도이다. 동해 전 영역에서 인공위성 고도계와 연안 조위관측소의 해수면 높이 자료를 동시에 얻을 수 있으므로 준실시간으로 넓은 해역에 대하여 동시성 있는 표층 지형류의 산출이 가능하다. 산출된 동해 표층 지형류로부터 주요 해류의 위치와 세기 그리고 중규모 이상의 소용돌이 발달 양상을 살펴볼 수 있다. 따라서 이들 해류의 이름과 평균적인 위치를 알 수 있도록 동해 해양지명에 대한 명칭과 위치를 기술하고, 개념적인 해류도를 제시하였다. 동해 해류정보가 실제 실용화될 수 있도록 인공위성 고도계 자료를 이용하여 산출한 지형류의 월 계절 연도별 해류 분포 예를 들고, 각 해류 분포를 설명하였다. 또한 시 공간적으로 변화하는 동해 표층해류 분포 형태를 객관적으로 분류하기 위하여 16년(1993~2008년)간의 표층해류 자료를 경험직교함수(Empirical Orthogonal Function, EOF)를 이용하여 분석하였다. EOF분석 제1모드(mode)는 주로 한국 동해안을 따라 북쪽으로 흐르는 동한난류와 야마도분지 남서부 시계방향 순환의 강화 또는 약화를 나타냈다. 제2모드는 동한난류가 동해 남부를 가로지르며 사행하는 정도를 나타냈으며, 해류 사행의 파장은 약 300 km이었다. 제1모드와 제2모드가 모두 해류의 연간 변동성을 나타냈으며, 제1모드와 제2모드의 시간계수에 따라 동해 표층해류 분포를 관성 경계류 패턴(pattern), 대마난류 패턴, 사행 패턴, 외해분지류 패턴으로 분류할 수 있다. This is the first attempt to produce simultaneous surface current field from satellite altimeter data for the entire East Sea and to provide surface current information to users with formal description. It is possible to estimate surface geostrophic current field in near real-time because satellite altimeters and coastal tide gauges supply sea level data for the whole East Sea. Strength and location of the major currents and meso-scale eddies can be identified from the estimated surface geostrophic current field. The mean locations of major surface currents were explicated relative to topographic, ocean-surface and undersea features with schematic representation of surface circulation. In order to demonstrate the practical use of this surface current information, exemplary descriptions of annual, seasonal and monthly mean surface geostrophic current distributions were presented. In order to objectively classify surface circulation patterns in the East Sea, empirical orthogonal function (EOF) analysis was performed on the estimated 16-year (1993-2008) surface current data. The first mode was associated with intensification or weakening of the East Korea Warm Current (EKWC) flowing northward along the east coast of Korea and of the anti-cyclonic circulation southwest of Yamato Basin. The second mode was associated with meandering paths of the EKWC in the southern East Sea with wavelength of 300 km. The first and second modes had inter-annual variations. The East Sea surface circulation was classified as inertial boundary current pattern, Tsushima Warm Current pattern, meandering pattern, and Offshore Branch pattern by the time coefficient of the first two EOF modes.

잔디생육에 대한 유기물, 활성탄소 및 마그네슘의 효과

최병주,심재성,밝훈,Choi, Byung-Ju,Shim, Jai-Sung,Park, Hoon 한국잔디학회 1994 한국잔디학회지 Vol.8 No.3

Effect pf rape seed oil cake compast (OM) active carbon(C) compound fertilizer (NPK) and magnesium sulfate (Mg) application on Zoysia koreana growth by lysimeter of 50cm soil column filled with a low fertility loam. Effect on growth was in order of OM>OM . NPK interaction> NPK . active carbon and Mg were not effective OM . NPK interaction effect was negative on leaf width and root dry matter yield. OM and OM . NPK interaction were most effective on rhizome growth. Their effect did not change the ratio of growth rates between aerial part and rhizome but change that between aerial part and root. Leaf width was most sensitive to the treatments.

훼어웨이 경사의 토양 깊이별 무기성분 분포

최병주,주영희,밝훈,Choi, B. J.,Ju, Y. H.,Park, H. 한국잔디학회 1997 한국잔디학회지 Vol.11 No.2

Soil chemical properties were investigated to elucidate vertical movement of mineral nutrients in a fairway slope of 27 year-old golf course. Soil samples were taken at every 10cm depth to 4Ocm on 4 sites 20m apart each along two parallel lines 60m apart on the slope(15˚) in August. Accord-ing to the similarity of vertical distribution pattern they could be classified into 6 distinctive groups(magnesium, nitrate, phosphorus, ammonium, manganese and copper) and the slope tended to affect the vertical movement of minerals. The contents of Ca and Mg increased with depth while NO$_3$-N and Zn decreased and correlated positively. Soil pH showed significant positive correlation with depth, Ca and Mg. Phosphorus content was highest in 10~20cm depth and decreased resulting in relatively high content in 30~40cm depth of the bottom site of slope. Iron distribution pattern was similar to phosphorus. Potassium and $NH_4$showed various(irregular) patterns. Mn was highest in the deep layer at the lower sites of slope but it was reverse at the upper sites and negatively correlated with Fe. Cu content incresed with depth and heighest in 20~30cm depth. Electroconductivity showed significant positive correlation with $NO_3$-N. Magnesium, cal-cium and copper seem to be prone to defficiency due to fast leaching, and nitrate and phosphorus prone to excess problem. Preventive measures on acidification of surface soil should be taken.

일부(一部) 농촌주민(農村住民)의 사망(死亡) 실태(實態) 조사(調査)

최병주,Choi, Byung-Ju 대한예방의학회 1977 Journal of Preventive Medicine and Public Health Vol.10 No.1

A study on the status of death in rural area was conducted during the period from July '75 to August '75. 1,225 families and 8,067 population (4,124 male, 3,943 female) had been lived and 149 events of death since 5 years before study were occurred in survey area, Nammyon, Hwasoongun, Chonnam. The summarized results were as follows: 1. Quinquennial death rate was 3.7 (5.2 for male, 2.1 for female). 2. In respect of age group, the highest group was over 70 years old group (age at death, 30.8% of total death). High age groups (over 50 years old) occupied 71.1% of total death and death rate in these groups were higher in male than female. Child death (0-4 years old) occupied 7.4% of total death and infant death rate was higher in female than male. 3. Duration of sickness before die was highest in 1 to 12 months (39.6%) 4. The most frequent cause of death was disease of digestive system (12.1%). Other important causes were disease of circulatory system (10.7%), disease of respiratory system (9.4%) and infectious and parasitic disease (4.7%). Disease of digestive system was the most frequent cause of death in male (14.0%) and disease of respiratory system was the most frequent cause in female (9.5%).

경기도 수개 골프장의 표토 토양화학성과 잔디의 무기성분함량

최병주,심재성,주영희,밝훈,Choi, Byung-Ju,Shim, Jai-Sung,Ju, Yeong-Hee,Park, Hoon 한국잔디학회 1993 한국잔디학회지 Vol.7 No.2

Surface soils and aerial parts of Korean lawn(Zoysia koreana) at normal fair way of 4 golf courses and yellow discolored fairway of one golf course in Kyonggi province were taken at and analyzed for mineral contents in soil Mg and Ca were most deficient while EC was too high and phosphorus was exess. There were significant positive correlation between pH and Ca and between EC and total N. There was no consistent simple correlation between single component in soil and plant, indicating the involvement of multi-minerals in one mineral absorption. m mineral contents of aerial part Mg was severely low. potassium moderately but Ca was normal, Mg and Ca showed significant correlation in aerial part, yellow-discolored lawn showed the lowest content of Mg in aerial part and surface soil. Very high N and high phosphorus in aerial part inspite of low P in soil. The above facts indicates Mg deficiency in fair way soils in most golf courses resulting in yellow-discoloration in lawn.

적기의 위협 평가 자동화를 위한 퍼지 규칙 방법론

최병주,김지은,김진수,김창욱,Choi, Byeong Ju,Kim, Ji Eun,Kim, Jin Soo,Kim, Chang Ouk 한국군사과학기술학회 2016 한국군사과학기술학회지 Vol.19 No.1

Threat evaluation is a process to estimate the threat score which enemy aerial threat poses to defended assets. The objective of threat evaluation is concerned with making an engagement priority list for optimal weapon allocation. Traditionally, the threat evaluation of massive air threats has been carried out by air defence experts, but the human decision making is less effective in real aerial attack situations with massive enemy fighters. Therefore, automation to enhance the speed and efficiency of the human operation is required. The automatic threat evaluation by air defense experts who will perform multi-variable judgment needs formal models to accurately quantify their linguistic evaluation of threat level. In this paper we propose a threat evaluation model by using a fuzzy rule-based inference method. Fuzzy inference is an appropriate method for quantifying threat level and integrating various threat attribute information. The performance of the model has been tested with a simulation that reflected real air threat situation and it has been verified that the proposed model was better than two conventional threat evaluation models.

세라믹재 연삭시 연삭특성에 관한 연구

최병주(Byung-Joo Choi),박성구(Seong-Ku Park),김광복(Bok-Kwang Kim) 산업기술교육훈련학회 2009 산업기술연구논문지 (JITR) Vol.14 No.3

The number of parts made of ceramic materials has gradually been increased in field of mechanical engineering and, such a mechanical engineering ceramics have spread because of three very favourable characteristic features, namely, heat, wear, and corrosion resistance. Therefore, the elaboration of suitable grinding technologies is important. Grinding is problematic because crack-free ceramics are difficult to process owing to their particular micro structures. In this paper the mechanism of the material removal and crack formation, residual stress and the surface roughness of workpiecs in grinding are examined so experimental result is as follow The mechanism of material removal in the grinding of ceramics is considered the type of brittle fracture and the surface roughness shows almost constant trend with actual wheel depth of cut.