Ethyoene Oxide 폭로 근로자의 말초 임파구 자매염색분체 교환에 관한 연구

황천현,박종태,장성훈,김대성,이원진,김청식,김영환 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.4

Operators of hospital sterilizers who use ethylene oxide(EtO) were studied to determine the exposure of EtO level and the frequency of sister chromatid exchanges(SCEs) from June 12 to July 20, 1997. To evaluate SCEs in the peripheral blood cells, we selected 22 workers at the central supply room of 4 university hospitals and 22 unexposed workers at the same hospitals according to match sex, age, and smoking habit and also did questionnaires. The mean air concentrations(8-hr TWA) of EtO at 4 university hospitals were less than 1 ppm. The SCE frequencies in exposed workers to EtO and controls were normally distributed. The SCE frequencies in exposed workers to EtO and controls were 6.42±0.63, 5.86±0.69, respectively and their differences were statistically significant(p=0.0093). But there were no statistically significant differences in smoking, alcohol intake, coffee drinking. Especially smokers who exposed to EtO were increased SCE statistically significant than the exposed group who did not smoke.

PC와 VAX통신을 위한 통신 소프트웨어 구현에 관한 연구

황대준,김창현 成均館大學校 科學技術硏究所 1990 論文集 Vol.41 No.1

Communication software performs the complex and often tricky task of controlling the communications process between communication nodes. The program must establish and maintain a connection with another computer, display all of the incoming information on the computer's screen, and move data recieved from the keyboard or disks through the communications port into the modem. The program must also tell the PC how to prepare the outgoing data for transmission. The PC-VAX program developed there provides such functions as described previously.

상시계측자료의 관리를 위한 테이터베이스의 원형 설계

황진하,박종희,조대현 충북대학교 건설기술연구소 2003 建設技術論文集 Vol.22 No.2

Prototype design of the database for ambient measurement data management is presented in this paper. To express the associated data generated during the whole process of ambient measurement efficiently, requirement/task analysis for database management system are peformed. And then to define and organize objects and schema for data model, conceptual and logical design are performed, which convert data model into logical schema. This prototype database is constructed by using via the object-relational data modelling approach.

안드로이드 플랫폼에서 스마트폰 블랙박스 설계 및 구현

황현정;이호섭;전대현;김동열;김진일 東義大學校産業技術開發硏究所 2012 産業技術硏究誌 Vol.26 No.-

본 연구에서는 각종 센서를 통해 교통사고 현장의 상황을 자동으로 저장, 분석할 수 있는 스마트폰 블랙박스를 설계하고 구현하였다. 기존의 웹 캠 형식의 블랙박스 기능을 탈피하고, 사용자가 휴대하기 편한 스마트 폰이라는 장점을 활용해 차량뿐만 아니라 오토바이, 자전거에도 모두 사용가능할 수 있도록 안드로이드 플랫폼을 이용하여 블랙박스 기능을 개발하였다. 또한, 사고발생시 사전에 등록한 번호로 사고위치를 SMS 문자로 전송하여 사고 상황을 노출하도록 설계되었다.

장기투석을 받은 만성 신부전 환자에서 발생한 종양에 관한 고찰

황정화,이혜경,홍현숙,박재성,김대호,권귀향,최득린,황승덕,이희발 순천향의학연구소 1996 Journal of Soonchunhyang Medical Science Vol.2 No.2

The authors tried to evaluate tumor occurrence in long-term dialysis patients with chronic renal failure. Among 359 patients, 20 patients (about 5.6%) were diagnosed with malignancy during long-term dialysis from the period of 1983 to 1995 at our nephrology department. The ultrasonographic and computed tomographic findings including the clinical features of 20 patients that were retrospectively reviewed. The mean age of the patients was 53 (37-75)years old and the ratio of male to female was 9:1. Among the 20 cases, 7 cases of hepatoma (35%) were developed. Among them, urinary tract tumors such as renal and bladder cancer were developed in 4 (20%) and 2 (10%) of the cases. Other malignant tumors were lymphoma, stomach cancer, uterine cervical cancer, cholangiocarcinoma, lung cancer, meningioma, and acoustic neuroma one case of each (each of 5.3%). The most common tumor in patients with chronic renal failure, who were receiving long-term dialysis, was hepatoma and the second most common tumor was cancer of the urinary tract such as kidney and bladder.

고등학생들의 생물교과 관련 과학 과정기능 평가

곽대오,황진석,이현주 이화여자대학교 교과교육연구소 2010 교과교육학연구 Vol.14 No.1

본 연구에서는 고등학생들의 생물교과 관련 과학 과정기능 수행 정도를 파악하고 이를 통하여 고등학교 생물교과에서의 교육과정과 교수․학습방법 개선 등의 피드백에 필요한 정보를 고등학교 생물교사들에게 제공하고자 고등학생들을 대상으로 본 연구에서 개발한 생물교과 관련 과학 과정기능 평가도구를 적용하여 다음과 같은 결과를 얻었다. 고등학생들의 생물교과 관련 과학 과정기능 성취도는 전체적으로 매우 낮은 편이었고 개인별로 차이가 심하였다. 과학 과정기능 범주별로는 결과분석 범주의 성취도가 다른 범주들에 비해 높았고, 그 다음으로 결과해석 범주의 성취도가 다른 5가지 범주들에 비해 높았다. 생물교과 관련 과학 과정기능 평가 결과 생물교과 실험수업 경험학생들이 비경험학생들 보다 전체 성취도가 높게 나타났다. 과학 과정기능 범주별로 보면 문제해결 방법설계, 수행, 결과해석, 적용 등의 3가지 범주들의 성취도에서 생물교과 실험수업 경험학생들이 비경험학생들에 비해 높았다. 남학생들과 여학생들의 성취도는 7가지 과학 과정기능 범주들 가운데 문제 및 가설설정 1가지 범주에서만 남학생들이 여학생들 보다 높게 나타났으나 나머지 6가지 범주들에서는 차이가 없었다. 그 결과 전체적으로는 남학생들과 여학생들의 성취도가 유의적인 차이가 나타나지 않았다. 고등학생들의 생물교과 학업성취도와 생물교과 관련 과학 과정기능 성취도간에는 매우 강한 정의 상관관계가 있음을 알 수 있다. The primary purpose of this study was to assess high school students’ performance on science process skills in biology. In order to collect data, a test instrument composed of 27 restricted response questions developed by the authors was administered to 258 (129 males and 129 females) second year students at 8 high schools in Gyeongsangnam-do. The results were as follows: The students received low, unsatisfactory mean scores in the test of science process skills in biology, and individual differences were very large. Out of the seven categories, the achievement score was the highest, and as for the interpretation of the results, formulation of problems or hypotheses, performance, application of results, and identification of variables or control of experiment followed in order. Finally, the lowest achievement score was in the category of design of ways and means. Students who had experienced experimental activities in the subject matter of biology scored significantly (p<0.01) higher than those with less experience. Gender difference in the mean scores of science process skills in biology was not found. Finally, there was a statistically significant (p<0.01) and a fairly strong correlation (r=0.599) between the students' score in the science process skills test and learning achievement in biology.

대단위 병렬컴퓨터 시스템 노드구조 설계를 위한 워크벤치(SKYLAB)의 개발

윤현진,육은정,노권형,황대준 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1

Building the simulation environment of massively parallel computer systems has been recognized as a better approach over the experimentation on real machines to study extensively their architectural behaviours at a minimum cost. In this paper, we introduce a parallel processing workbench SKYLAB being implemented on DE C5000/25 and SPARCI workstations for design of node architectures featuring optimal organization for massively parallel processing. For the through analysis of the features of architectures in mind, the SKYLAB comes with thress major components: the compilerbackend translating single-threaded codes into their equivalent multithreaded codes, the node architecture emulator incopperating target CPU for program execution, and the graphic use interface for easy interpretation and expedating the analysis of the statitistics from the simulation runs. The design experience of the node architecture of the DAVRID multithreaded parallel processing computer using the SKYLAB examplifies how much effictively to make experiment on parallel simulations using this integrated toolset.

공유버스 멀티프로세서시스템을 위한 버스 시뮬레이터의 설계

윤현진,박길철,황대준 成均館大學校 科學技術硏究所 1994 論文集 Vol.45 No.2

In this paper, we develop the simulation environment for evaluating the performance of multiprocessor systems using Futurebus^+ as shared bus with various configurations. The environment is constructed into three stages. The first is devoted to the preprocessing stage in which the parallel work- loads, multiple threads, are generated from single- thread codes traced on the benchmarks. The second stage includes the engine of the bus simulator. The results from the simulation include cache hit ratio, processor utilization and bus congestion ratio according to changes of the number of processors, and cache coherency protocols. Based on the analysis of the simulation results, we noticed that the processor utilization and the bus congestion ratio are heavily depend on cache hit ratio. The write-broadcast protocol is shown as the most effective scheme in comparison with other cache coherence protocols experimented.

패류의 영동에 관한 연구 : 4. 오분자기의 동결저장온도에 따른 품질의 변화

송대진,하진환,김수현 제주대학교 해양연구소 1985 해양자원연구소연구보고 Vol.9 No.-

AR기법을 이용한 SLAM 영상 개선

김현,송대건,황기환,연규헌,전계석 慶熙大學校 大學院 1998 高凰論集 Vol.22 No.-

In this paper, we have been studied the enhancement of SLAM image using average response methos. AR methos has been used to reduce the random noise in signal processing. In this the experiment, we have constructed the SLAM system of 10㎒ operating frequency and experienced for holed Al sample. In this experimental result, we have been found that SLAM using AR method was able to get the high-speed and enhanced image compared with SAM.