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.

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.

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

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.

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

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

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.

상부 위암에서 유문보존 근위부 위아전절제술과 공장간치술을 시행한 위전절제술의 비교

노승무,정현용,이병석,조준식,신경숙,송규상,이태용 충남대학교 암공동연구소 2003 암공동연구소 업적집 Vol.3 No.

Purpose: The aim of this study was to evaluate the short-term outcome of a pylorus-preserving proximal gastrectomy by comparing it with a jejunal interposition after a total gastrectomy in proximal gastric adenocarcinoma. Materials and Methods: For 22 patients (12 men and 10 women) who underwent a pylorus-preserving proximal gastrectomy, several clinical parameters were obtained from the medical records retrospectively. In this study, the data were collected between September 1993 and December 1999 at Chungnam National University Hospital, and the results were compared with those of 25 patients (17 men and 8 women) who underwent an isoperistaltic simple jejunal interposition. Results: The average operative time in the pylorus-preserving proximal gastrectomy group (220 minutes) was shorter than that in the jejunal interposition group (243 minutes) (P<0.05). The hemoglobin and hematocrit levels were significantly higher in the pylorus-preserving proximal gastrectomy group at 2 years after the operation. The body weight ratio (postoperative body weight/preoparative body weight) in patients who had a pylorus-preserving proximal gastrectomy was significantly higher than that in patients with a jejunal interposition at 2 years after the operation. The jejunal interposition procedure had better outcomes in anastomotic site stricture, duration of hospital stay, and number of removed lymph nodes (P<0.05). Conclusions: We think that from the viewpoint of quality of life, a pylorus-preserving proximal gastrectomy, as well as a jejunal interposition, is a useful reconstruction method for early adenocarcinomas of the proximal stomach. However, stricture of the esophagogastrostomy site in the pylorus-preserving proximal gastrectomy is a common problem to be solved in the future. (J korean Gastric Cancer Assoc 2002;2:145-150)

상부 위암에서 유문보존 근위부 위아전절제술과 공장간치술을 시행한 위전절제술의 비교

노승무,정현용,이병석,조준식,신경숙,송규상,이태용 충남대학교 암연구소 2003 암연구소 업적집 Vol.3 No.-

Purpose: The aim of this study was to evaluate the short-term outcome of a pylorus-preserving proximal gastrectomy by comparing it with a jejunal interposition after a total gastrectomy in proximal gastric adenocarcinoma. Materials and Methods: For 22 patients (12 men and 10 women) who underwent a pylorus-preserving proximal gastrectomy, several clinical parameters were obtained from the medical records retrospectively. In this study, the data were collected between September 1993 and December 1999 at Chungnam National University Hospital, and the results were compared with those of 25 patients (17 men and 8 women) who underwent an isoperistaltic simple jejunal interposition. Results: The average operative time in the pylorus-preserving proximal gastrectomy group (220 minutes) was shorter than that in the jejunal interposition group (243 minutes) (P<0.05). The hemoglobin and hematocrit levels were significantly higher in the pylorus-preserving proximal gastrectomy group at 2 years after the operation. The body weight ratio (postoperative body weight/preoparative body weight) in patients who had a pylorus-preserving proximal gastrectomy was significantly higher than that in patients with a jejunal interposition at 2 years after the operation. The jejunal interposition procedure had better outcomes in anastomotic site stricture, duration of hospital stay, and number of removed lymph nodes (P<0.05). Conclusions: We think that from the viewpoint of quality of life, a pylorus-preserving proximal gastrectomy, as well as a jejunal interposition, is a useful reconstruction method for early adenocarcinomas of the proximal stomach. However, stricture of the esophagogastrostomy site in the pylorus-preserving proximal gastrectomy is a common problem to be solved in the future. (J korean Gastric Cancer Assoc 2002;2:145-150)

이동전화 서비스의 고객 만족도와 서비스 품질에 관한 연구

이승규,라준영 한국경영과학회 2000 한국경영과학회 학술대회논문집 Vol.- No.2

This paper develops a model of customer satisfaction in the mobile telecommunication services. We examine the relationships among customers' overall satisfaction and underlying dimensions; perceived service quality, service value, and brand image. Variables related to customer satisfaction and dissatisfaction are derived from customer critical incidence survey. The model is estimated with multi-variate data analysis. Results indicate that the (1) technical service quality is the main driver of customer overall satisfaction, (2) some peripheral services are rapidly evolving into the core services of mobile telecommunications, and (3) the current policy of service providers does not focus on customer satisfaction but on establishing churning barrier by increasing switching costs.