한국의 태안반도에서 관측된 CH4의 지역적 배경농도에 관한 연구 : 1990 ~ 1992년 자료를 중심으로 ahn Peninsula in Korea during 1990 ~ 1992

정용승,이근준 한국환경과학회 1992 한국환경과학회지 Vol.1 No.2

Since November 1990, the observations of methane (CH_4) level have been carried out at Tae-ahn Peninsula (TAP) in Korea. Analysis on atmospheric data obtained in the period from November 1990 to August 1992 is carried out and the results are included in this study. We note that CH_-4 does not have a clear seasonal cycle with a minor maximum in August September and with a minimum in June-July. The variations in monthly average level are much larger with 1765.01∼1857.21 ppb (amplitude 92.20 ppb). The occurrence of a minimum in June-July is due to the inflow of the North Pacific air, an increase of OH radical and due to a decrease in CH_4 emission from rice paddy. A maximum in August and September appears to result from an increase in organic materials in agriculture (rice paddy) and forests, inputs of local sources due to weak airflows, stagnation of the warm and moist air and from a decrease in OH radical. The present analysis indicates that according to CH_4 data from Mongolia and from several sites in North Pacific TAP is influenced as much as 31 ppb in average from the inputs of Chinese emission. When the atmospheric CH_4 of TAP is compared with data observed at Korea National University of Education (KNU), the values of KNU are higher (127 ppb) than those of TAP. It is clear that air samples taken at KNU are influenced strongly by local sources in central Korea than those at TAP. According to analysis of trajectories and airflows, we find that there are 4 types in classification. Firstly, when an air flow is originated mainly in China values of CH_4 gas are in medium ranges. Secondly, when an airflow is from both local (Korea) and China we find higher values. Thirdly, with an airflow from both local (Korea) and Japan origins medium values are recorded. Fourthly, when an airflow of maritime origin arrives low values of atmospheric CH_4 are observed at TAP.

한국의 태안반도에서 CH₄의 지역적 배경농도에 관한 연구 : 1990 ∼ 1992 년 자료를 중심으로

이근준,정용승 한국교원대학교 환경과학연구소 1994 환경연구논문집 Vol.- No.2

Since November 1990, the observations of methane (CH₄) level have been carried out at Tae-ahn Peninsula (TAP) in Korea. Analysis on atmospheric data obtained in the period from November 1990 to August 1992 is carried out and the results are included in this study. We note that CH₄ does not have a clear seasonal cycle with a minor maximum in August-September and with a minimum in June-July. The variations in monthly average level are much larger with 1765.01∼1857.21 ppb (amplitude 92.20 ppb). The occurrence of a minimum in June-July is due to the inflow of the North Pacific air, an increase of OH radical and due to a decrease in CH₄ emission from rice paddy. A maximum in August and September appears to result from an increase in organic materials in agriculture (rice paddy) and forests, inputs of local sources due to weak airflows, stagnation of the warm and moist air and from a decrease in OH radical. The present analysis indicates that according to CH₄ data from Mongolia and from several sites in North Pacific TAP is influenced as much as 31 ppb in average from the inputs of Chinese emission. When the atmospheric CH₄of TAP is compared with data observed at Korea National University of Education (KNU), the values of KNU are higher (127 ppb) than those of TAP. It is clear that air samples taken at KNU are influenced strongly by local sources in central Korea than those at TAP. According to analysis of trajectories and airflows, we find that there are 4 types in classification. Firstly, when an air flow is originated mainly in China values of CH₄ gas are in medium ranges. Secondly, when an airflow is from both local(Korea) and China we find higher values. Thirdly, with an airflow from both local (Korea) and Japan origins medium values are recorded. Fourthly, when an airflow of maritime origin arrives low values of atmospheric CH₄are observed at TAP.

방광요관 역류환아에서 항역류수술후 99mTc-DMSA 신주사 소견의 분석

오승준,고재준,이경철,임대정,이승배,이안기,김광명,최황 大韓泌尿器科學會 1998 Korean Journal of Urology Vol.39 No.9

웹 취약점 잘못된 조치 사례 및 취약점 조치방법에 대한 연구

유승상, 조인준 배재대학교 공학연구소 2021 공학논문집 Vol.23 No.1

With the development of the times, state agencies and companies are processing using business programs implemented on their respective websites. Due to this processing method, homepage services necessary for work and daily life are continuously increasing, and hacking accidents are also increasing accordingly. In order to prevent such hacking accidents, web vulnerabilities can be checked and hacking accidents can be prevented by actions such as taking measures against discovered vulnerabilities, but wrong measures can lead to hacking accidents as vulnerabilities are not removed. The purpose of this paper is to help prevent hacking by shortening the time to remove vulnerabilities by presenting accurate measures based on cases of wrong measures against major vulnerabilities of administrative agencies. 시대의 발전에 따라 국가 기관 및 기업에서 각각의 홈페이지에 구현되어 있는 업무 프로그램 등을 이용하여 처리하고 있다. 이러한 처리방식으로 인하여 지속적으로 업무 및 일상에 필요한 홈페이지 서비스가 증가하고 있으며, 그에 따른 해킹사고 역시 증가하고 있다. 이러한 해킹사고를 예방하기 위해 웹 취약점 점검을 진행하며, 발견된 취약점을 조치하는 등의 행위로 해킹사고를 예방할 수 있으나 잘못된 조치 방법으로 인하여 취약점 제거가 되지 않아 해킹사고로 이어질 수 있다. 해당 논문에서는 행정기관의 주요 취약점 TOP10에 대한 잘못된 조치 사례를 바탕으로 정확한 조치 방법을 제시, 취약점 제거 시간을 단축하여 해킹 예방에 도움을 주는데 목적이 있다.

여성 복압성요실금 환자에서 안정 시 방광조영술상 Inverted Tear-drop Sign의 의의

오승준,문경현,주명수,조경식 大韓泌尿器科學會 2001 Korean Journal of Urology Vol.42 No.4

서울시 영상산업의 입지 특성 분석

김의준,박승규 동의대학교 경제경영전략연구소 2004 經濟經營硏究 Vol.2 No.2

This research analyzes the reasons of movement from Chnug-mu district to Kang-nam district of motion picture industry. As motion picture industry moved to Kang-nam district from Chung-mu district, this research assumes that relating industry of motion picture industry also moved to same location. So, this research reveals the reasons in order to find out determinants of movement. Also, this reason deals propriety of geographical location through Weber’s Theorem, which means, it finds out optimal location point between user and location of facilities. This research was taken by buffering analysis, spatial analysis, and network analysis of Arcview, according to number of chair in theater as a reference pole. Also it uses a density and contour analysis to find out spatial affected region by agglomerated motion picture industry. Lastly, it shows extent of effect by motion picture industry to self-government district through number of labor forces. In results, it shows that agglomeration and movement of motion picture industry happened by the extent of agglomeration of relative motion picture industry. And agglomeration of relative motion picture industry draw and affect to movement and growth of motion picture industry.

초음파검사의 수치적 모델링 기법 : 유한차분법 및 유한요소법

임현준,유승현 한국비파괴검사학회 2000 한국비파괴검사학회지 Vol.20 No.2

초음파검사에서 발생하는 물리적 현상의 복잡성을 고려할 때, 이를 이론적으로 모델링하기 위해 수치적인 기법을 이용하는 것이 효과적인 경우가 많다. 본 논문에서는 초음파검사를 수치적으로 모델링하는 기법들에 대하여 개괄적으로 살펴보고, 특히 유한차분법과 유한요소법에 대하여 상세히 알아본다. 즉, 유한차분법과 유한요소법을 이용한 해석의 개요를 설명하고, 이들의 적용시 고려사항 및 문제점에 대해 알아 본 후, 기존의 연구결과 중 중요한 것들을 참고문헌으로 열거하고 몇 가지 예를 소개한다. 계속되는 컴퓨터의 기술적 발전으로 인하여 초음파검사에 대한 수치적 모델링 기법의 신뢰성과 편의성이 지속적으로 증대될 것으로 기대된다. Due to the great complexity of the physical phenomena involved in most ultrasonic nondestructive testing, the numerical method is effective in many cases of their theoretical modeling. A brief overview is provided in this paper of the numerical methods used in modeling ultrasonic nondestructive testing, with an emphasis on the finite difference and the finite element methods. The procedures of execution, special considerations required, and some previous research results of the finite difference and the finite element methods are presented, with a rather extensive list of work reported in the literature. These numerical modeling techniques for ultrasonic nondestructive testing are expected to be more reliable and more convenient, as a result of the continuing technological development of computers

대용량 어휘를 기반으로 한 화자의 적용 알고리즘

홍승준,권영헌,이건상 한양대학교 이학기술연구소 2001 이학기술연구지 Vol.3 No.-

화자독립인식기의 평균적인 성능은 좋더라도 사용하는 화자에 따라 인식률이 많이 차이가 난다. 이러한 문제점을 해결하기 위한 방법으로 본 논문에서는 기존의 codebook을 사용하여 사용자의 적은 어휘로써 높은 인식률을 가질 수 있는 화자 적응 방법을 제안한다. 본 논문에서는 대용량 어휘인식을 위해 음소인식에 뛰어난 성능을 지닌 CHMM(continuous hidden Markov model)을 사용하였고, 적응 알고리즘인 MAP(maximum a posterior)를 사용하여 HMM의 파라미터를 적응시키는 방법으로 대용량 어휘 인식률을 계산하였다. 화자 적응 알고리즘을 적용하기 이전과 화자 적응 알고리즘을 적용했을 때 인식률을 비교하였을 경우 음소 인식률이 40%이상 좋아짐을 알 수 있었다. In this paper. we propose a speaker adaptation algorithm. We make an experiment using CHMM which shows good performance for phoneme recognition. MAP formulation is developed to adapt the characteristics of speaker with the estimation of the HMM parameter from the training data. The proposed adaptation algorithm is evaluated in large vocabulary continuous speech recognition. In the experiment. we compare the recognition accuracy of the adapting acoustic model with that of common speaker. At the experimental results. MAP algorithm achieve up to about 40% additional reduction of error in phoneme recognition.

위암환자의 복강내에 투여한 Mitomycin C-Carbon Particle의 Mitomycin 용출에 관한 연구

노승무,조영훈,정경수,오정연,김진향,양준묵,강대영,송규상,조준식,최선웅,이진호,민병무,김용백,김창식,박근성,인현빈,정현용,김학용 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

Locoregional recurrence is the most common type of recurrence in surgical operation of gastric adenocarcinoma, and peritoneal dissemination is one of the most difficult problems in advanced gastric adenocarcinoma treatment. Because the peritoneal cavity is the most common site of the first recurrence after gastric cancer resection, intraperitoneal chemotherpy seems a logical choice for cancer chemotherapy. The Mitomycin C(MMC) adsorbed by the activated charcoal particles(CH) is relatively released when the drug concentration surrounding the carbon particles becomes low in the peritoneum of the peritoneal cavity. For the intraperitoneal chemotherapy on the advanced gastric adenocarcnoma, mitomycin C adsorbed on activated carbon particles was administered in the peritoneal cavity just before abdominal wall closure. The closed drainage tubes were inserted in the peritoneal cavity and clamped for tuo hours after completion of operation. MMC concentrations were serially measured in peritoneal fluid, plasma and urine at 2hour, 48 hour, 72 hour and 168 hour following its administration in order to study the efficacy of the MMC-CH as a drug delivery system. There were minimal toxicities in born marrow, liver, and gastrointestinal system after intraperitoneal MMC-CH administration. The data of this study suggested that MMC-CH may have a somewhat more beneficial effect than surgery alone when administered in optimal dose and schedules, but the MMC concentration of the peritoneal fluid was not sufficient to eradicate remnant cancer cells, and effective duration of maintenance was only below 24 hours in the peritoneal fluid and plasma.

資本自由化下에서의 最適金融政策

金仁埈,洪承杓 서울大學校 經濟硏究所 1990 經濟論集 Vol.29 No.2