잠복원발종양의 원발병소 진단시 내시경 유도하 생검 및 구개편도적출의 진단적 의의

김세헌,김광문,이준협,이승수,서진원,홍원표 대한이비인후과학회 1998 대한이비인후과학회지 두경부외과학 Vol.41 No.3

자연 방사선량 중 우주선 기여 성분 정량 연구

전재식,오희필,하정우,오헌진,강인선 대한방사선 방어학회 1988 방사선방어학회지 Vol.13 No.2

자연 방사선 피폭선량 중 우주선 전리 성분의 기여를 정량하기 위하여 LiF TLD를 이용하여 약 1년반에 걸쳐 3개월 간격의 주기적 측정을 수행하였다. TLD는 세가지를 사용하였는데 그것은 칩과 PTFE원판형으로 된 두 가지의 ?LiF와 중성자 성분의 기여를 가려내기 위한 원판형의 ?LiF였다. 선량측정은 뱃지에 넣은 TLD를 충남대학교 대덕 캠퍼스의 한4층콘크리트 건물내 3층의 한 연구실에 설치한 10-15㎝ 두꼐의 납차폐 상자에 넣어서 90일 간격으로 다섯 주기 동안 수행하였다. 비교 연구를 위하여 3"Φ×3" 원통형NaI(T1) 섬광 검출기와 1024채널 MCA를 이용하여 3MeV 이상의 우주선 경성분에 대한 분광분석을 병행하였는데 그 결과 옥내 차폐체를 이용한 TLD측정치는 옥외 우주선 전리 성분의 약 75%를 측정하고 있음이 밝혀졌다. 이와 같은 차폐 손실을 보정한 TLD측정 결과에 의하면 충남대 대덕 캠퍼스 옥외에서 우주선 전리 성분의 기여는 34.3±1.1nGy-h¹로 나타났는데 이것은 이 측정 지점에서 예측할 수 있었던 선량 값과 매우 잘 일치하는 것이다. In order to quantify the contribution of cosmic-ray ionizing component to the dose given by natural background radiation, a series of measurement has been carried out using LiF TLDs for about one and a half years on quaterly basis. Three different types of LiF TLDs namely, chips and PTFE based disks of ?LiF, and the same disks of ?LiF for identifying possible contribution of neutron component were used. Measurements were made by placing badge-incased TLDs in a lead castle of 10 to 15㎝ thick installed in a room n the third floor of a four-story building in CNU Daedeok campus for 5 cycles of 90 days. For comparison a series of spectrometric study was also performed for the energy region over 3 MeV using a 3"Φ×3"NaI(T1) scintillation detector in association with an MCA of 1024 channels, and it was found that the data obtained by the TLDs placed in the lead castle indicate 75% of the dose given by outdoor cosmicray component. The results obtained by the TLDs through correction for shielding loss show that the outdoor dose contribution of ionizing component of cosmic rays at this campus is 34.3±1.1nGy/h which satisfactorily agrees with that expected for our particular location of measurement.

대덕지역 환경방사선에 대한 감마선 분광분석연구

전재식,오희필,오헌진,윤주용 충남대학교 자연과학연구소 1983 忠南科學硏究誌 Vol.10 No.1

For an assessment of local environmental radiation characteristics, a series of in-situ spectrometry was carried out at four different points in open field of Daedeok area and inside a laboratory of CNU usiing 3″×3″cylindrical NaI(T1) scintillation detector and 400 channel pulse height analyzer. The exposure rate was evaluated from the measured gamma-ray spectrum by means of direct spectrum-exposure rate conversion operation. Thus evaluated exposure rate was compared with that observed by a pressurized ionization chamber at the same pont and time, and the comparison showed good agreement within statistical uncertainty. The exposure rate, corrected for the contribution of cosmic ray photon below 3 Mev, self-contamination of ^(40)K, and directional response of the detector, was found to range from 9.77 to 10.72 μR/hr in open field, while it was 12.46 μR/hr inside the laboratory. Analysis of the gamma-ray spectra revealed that the majority of the environmental radiation in this area consists of the gamma-rays from ^(238)U and ^(232)Th decay series plus those from ^(40)K.

감마線分光分析 및 熱螢光檢出法에 의한 自然放射線의 線量測定硏究

田載植,吳熙弼,崔哲圭,吳憲鎭,河正雨 대한방사선 방어학회 1985 방사선방어학회지 Vol.10 No.2

감마선분광분석 및 열형광선량측정법에 의한 자연환경방사선의 선량해석에 관한 연구를 1984년 10월부터 약 1년간에 걸쳐 충남대학교 대덕캠퍼스내의 1만㎡규모의 평면개활지에서 수행하였다. 이 연구에서 사용한 검출기는 3"ø×3" NaI(Tl) ,閃光計數器와 plastic에 밀봉하여 금속판에 압착 처리한 chip과 Teflon-disk로된 2종의 LiF TLD였다. 실측실험으로는 3회에 걸친 24시간 cycle의 in-situ spectrometry와 2회의 3개월 cycle과 1회의 1개월 cycle에 걸친 TLD field dosimetry를 수행하였다. 측정한 모든 spectrum은 G(E)연산자법에 의하여 照射線量率로 환산하였고 그 결과로부터 환경 방사선의 地殼成分을 산출하였다. 結果에 의하면 spectrometry로 구한 조사선량율이 평균(10.54±2.96)μR/hr, TLD chip으로 측정해석한 값은 (12.0±3.4)μR/hr, disk에서 얻은 값이 (11.0±3.6)μR/hr로 오차범위 안에서 매우 좋은 일치를 보이고 있다. 그러나 감마선분광분석에 의한 자연방사선의 에는 가끔 심한동요가 관측되었다. 정확한 환경방사선량해석을 위하여 감마선분광분석과 TLD의 적절한 동시 배합사용이 바람직 하며, 보다 고감도의 TLD에 관한 연구와 국제비교등을 통한 선량평가의 精度向上을 위한 보다 깊이 있는 연구가 필요하다는 結論에 도달하였다. A study for the assessment of natural environmental radiation exposure at a flat and open field of about 10, 000m2 in area in CNU Daeduk campus has been carried out by means Oi gamma-ray scintillation spectrometry and thermoluminescence dosimetry for one year period of time from October 1984. The detectors used were 3"ø×3" NaI(Tl) and two different types of LiP TLD, namely, chip sealed in plastic sheet which tightly pressed on two open holes of a metal plate and Teflon disk. Three 24-hour cycles of in-situ spectrometry, and two 3-month and one 1-month cycles of field TL dosimetry were performed. All the spectra measured were converted into exposure rate by means of G (E) opertaion, and therefrom exposure rate due to terrestrial component of environmental radiation was figured out. Exposure rate determined by the spectrometry was, on average, (10.54±2.96)μR/hr, and the rates of (12.0±3.4)μR/hr and (11.±3.6)μR/hr were obtained from chip and disk TLD, respectively. Fluctuations in diurnal variation of the exposure rate measured by the spectrometry were noticeable sometime even in a single cycle of 24 hours. It is concluded that appropriately combined use of TLD with in-situ gamma-ray spectrometry system can give more accurate and precise measure of environmental radiation exposure, and further study for more adequate and sensitive TLD for environmental dosimetry, including improvement and elevation of accuracy in data assessment through inter-laboratory or international intercomparison is necessary.

감마線分光分析 및 熱螢光檢出法에 의한 自然放射線의 線量測定硏究

田載植,吳熙弼,崔哲圭,吳憲鎭,河正雨 충남대학교 기초과학연구소 1986 연구논문집 Vol.6 No.-

감마선분광분석 및 열형광선량측정법에 의한 자연환경방사선의 선량해석에 관한 연구를 1984년 10월부터 약 1년간에 걸쳐 충남대학교 대덕캠퍼스내의 1만㎡ 규모의 평면개활지에서 수행하였다. 이 연구에서 사용한 검출기는 3″ø×3″NaI(TI) 閃光計數器와 plastic에 밀봉하여 금속판에 압착 처리한 chip과 Teflon-disk 로된 2종의 LiF TLD였다. 실측실험으로는 3회에 걸친 24시간 cycle의 in-situ spectrometry와 2회의 3개월 cycle과 1회의 1개월 cycle에 걸친 TLD field dosimetry를 수행하였다. 측정한 모든 spectrum은 G(E)연산자법에 의하여 照射線量率로 환산하였고 그 결과로부터 환경방사선의 地殼成分을 산출하였다. 結果에 의하면 spectrometry로 구한 조사선량율이 평균(10.54±2.96)μR/hr, TLD chip으로 측정해석한 값은 (12.0±3.4)μR/hr, disk에서 얻은 값이 (11.0±3.6)μR/hr로 오차범위 안에서 매우 좋은 일치를 보이고 있다. 그러나 감마선분광분석에 의한 자연방사선의 日變化에는 가끔 심한동요가 관측되었다. 정확한 환경방사선량해석을 위하여 감마선분광분석과 TLD의 적절한 동시 배합사용이 바람직 하며, 보다 고감도의 TLD에 관한 연구와 국제비교등을 통한 선량평가의 精度向上을 위한 보다 깊이있는 연구가 필요하다는 結論에 도달하였다. A study for the assessment of natural environmental radiation exposure at a flat and open field of about 10,000㎡ in area in CNU Daeduk campus has been carried out by means of gamma-ray scintillation spectrometry and thermoluminescence dosimetry for one year period of time from October 1984. The detectors used were 3″ø×3″NaI(TI) and two different types of LiF TLD, namely, chip sealed in plastic sheet which tightly pressed on two open holes of a metal plate and Teflon disk. Three 24-hour cycles of in-situ spectrometry, and two 3-month and one 1-month cycles of field TL dosimetry were performed. All the spectra measured were converted into exposure rate by means of G(E) opertaion, and therefrom exposure rate due to terrestrial component of environmental radiation was figured out. Exposure rate determined by the spectrometry was, on average, (10.54±2.96)μR/hr, and the rates of (12.0±3.4)μR/hr and (11.0±3.6)μR/hr were obtained from chip and disk TLD, respectively. Fluctuations in diurnal variation of the exposure rate measured by the spectrometry were noticeable sometime even in a single cycle of 24 hours. It is concluded that appropriately combined use of TLD with iu-sitn gamma-ray spectrometry system can give more accurate and precise measure of environmental radiation exposure, and further study for more adequate and sensitive TLD for environmental dosimetry, including improvement and elevation of accuracy in data assessment through inter-laboratory or international intercomparison is necessary.

감마선 분광 분석법에 의한 환경방사선의 선질 및 선량 측정연구

전재식,오희필,오헌진 충남대학교 자연과학연구소 1984 忠南科學硏究誌 Vol.11 No.2

For the purpose of the practical assessment of regional environmental radiation characteristics prior to possible artifical contamination due to ever increasing utilzation of nuclear radiation in various field, a series of in-situ spectrometry has been carried out by means of gamma-ray scintillation spectrometry in Daejeon-Daeduk area covering around 200㎢ were 8 measurement point were reasonably selected. Diurnal variation of the terrestrial component of natural radiation was also observed at one of the points, C.N.U. Daeduk campus. All the spectra measured were converted into exposure rate by means of G(E) operation, and therefrom exposure rates due to the terrestrial component were figured out. In order to assure the exposure rate thus obtained, these outcomes were compared with those measured simultaneousely at the same place by a pressurized ionization chamber calibrated by proper standard sources. As a result of the study it is concluded that the exposure rate in daytime due to the terrestrial component of natural radiation in Daejeon-Daeduk area is, on average, 8.83±1.54μR/hr with maximum and minimum of 10.91μR/hr and 7.25μR/hr, respectively. Although the exposure rate in this area varies with place, the spectra measured are quite similar in pattern which shows radiations mainly consisting of gamma-rays emitted from the decay products of ^232Th and ^238U series, and ^40K. The observation of the diurnal variation of the exposure rate due to the terrestrial radiation revealed that the exposure rte in general decreases during the nighttime. It is infered from a study of the spectra measured that the decrement in exposure rate stems from the closer deposition of emanation, which is heavier than other component of air, to the ground surface cooled down in the nighttime and accordingly enhance shielding effect of lighter component of air such as nitrogen and oxygen in between the earth surface and detector.

1905年頃 大邱地方의 經濟狀況 : Analysis of the Articles "Kyoung Je" "經濟"誌 記事를 中心으로 하여

金埈憲 嶺南大學校附設 社會科學硏究所 1993 社會科學硏究 Vol.13 No.1

비정규형 관계 모델을 바탕으로 한 설명 정보 데이타 모델

김준,이헌길,김진호 강원대학교 정보통신연구소 1997 정보통신논문지 Vol.1 No.-

As a result of recent advances in hardware and software technology, the processing requirements of multimedia data for end users have been increased. Because multimedia data have very large spaces, it takes a lot of time to access them. In order to retrieve multimedia data efficiently, the description of multimedia data has been used by several researches. This paper presents a new data model to represent the description of multimedia data conveniently. The data model is based on a Non-First Normal Form relational data model which supports atomic value, set, list, weighted-set, and weighted list as an attribute value by extending the existing relational data model. The data model will be more formal and practical than natural languages in representing the description of multimedia data, and it will be more powerful than the relational data modal. Therefore the data model will provide the description effectively to support the content-based retrieval of multimedia data.

간세포암에 대한 간동맥 화학색전술의 치료효과

이헌영,김병호,정현용,김영건,조준식 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

Hepatocellular carcinoma(HCC) is the second most common cause of cancer death in Korea. Generally, HCC was unresectable due to the frequently associated cirrhosis and advanced stage of tumor. As a palliative therapy of HCC, transcatheter arterial chemoembolization(TACE) was a proven effective mean of treating inoperable HCC. We have analyzed the effectiveness of TACE in inoperable HCC. TACE was performed in 20 patients from January in 1990 to May in 1993 at Chung Nam National University Hospital with the infusion of mixture of Lipiodol and Adriamycin. We analyzed the survival rates of the TACE group and the control group who received no specific treatment. The results were follows ; 1) The survival rate was significantly higher in TACE group than control group(p<0.01). The survival rate at the end sixth months and one year were 62.8% and 40.0% in TACE group, 26.6% and 0% in control group, respectively. 2) A declining level of AFP(Alph-fetoprotein) was shown in 8 among 10 cases who underwent TACE/and was higher than 500 ng/ml in pre-TACE level(p<0.01) and also tumor size was decreased in 7 among 20 cases who underwent TACE. 3) Side effects were fever(80.0%), and upper abdominal pain(75.0%) in TACE group but improved within 7 days after TACE and impairment of liver function was developed in most patients(TACE group) but improved within 2 weeks after TACE. As a palliative therapy of HCC, TACE is an effective and useful modality in treating and prolonging the survival time of patients with unresectable hepatocellular carcinoma.

日本植民地下, 朝鮮人 商事會社의 一類型 : 白山 貿易株式會社의 경우 The case of Baeksan Trading Co. Ltd

金峻憲 嶺南大學校社會科學硏究所 1984 社會科學硏究 Vol.4 No.2