Erratum to: Occurrence and surgical treatment of massive Morel-Lavallée lesion after large-volume liposuction: A rare clinical case

Byeong Jun Kim,Chul Hoon Chung,이승준 대한미용성형외과학회 2020 Archives of Aesthetic Plastic Surgery Vol.26 No.1

We have noticed an error in our published paper above. In the title, the order of “Byeong Jun Kim, Chul Hoon Chung, Seung Jun Lee” should be “Byeong Jun Kim, Seung Jun Lee, Chul Hoon Chung.” We sincerely apologize for the inconvenience that this may have caused.

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.

메셀로스폐액의 주입율에 따른 2단탈질공정의 질소 제거

정창화,심유섭,김성준,박철휘 대한상하수도학회 2003 상하수도학회지 Vol.17 No.6

The purpose of this study was to develop a solution to reduce the cost of methanol as external carbon source. The raw water of J-S.T.P. contains low concentration of readily biodegradable organics and high concentration of nitrogen due to the influents of industrial wastewater and leachate. Consequently, the influent C/N ratio is very low, and thus the supplemental addition of methanol is required to provide external carbon source for denitrification. Pilot plant experiments composed 2-stage denitrification process were performed to examine the effects and performances of the selected carbon source and the operation conditions for applications in practice. When the same amount of denitrifying substrates based on denitrification rate of methanol were injected, the effluent T-N concentration of using mecellulose wastewater was similar to that of methanol. Comparing the influent concentration of carbon source and the denitrification rate, it was shown that the denitrifying potential of mecellulose wastewater was 60% and injecting 1/3 of carbon source into the preanoxic tank was appropriate to ensure the stabilized effluent water quality. The COD,, requirement of mecellulose wastewater per nitrogen removed was 1.4 times of the required amount for methanol, and the settlability of sludge treated with mecellulose wastewater improved about 29%, which confirmed its potential as effective external carbon source.

기저질환이 없는 사람에서 발생한 Campylobacter fetus에 의한 재발성 심내막염 1예

전재범,정진원,김성혜,송문희,오형철,안성기,최상호,김남중,김양수,우준희,류지소 대한감염학회 2004 감염과 화학요법 Vol.36 No.6

C. fetus 심내막염은 드물게 발생하는 질환으로 주로 면역능이 저하된 환자에서 발병하고 대동맥판을 침범하는 경우가 많으며 적절한 치료가 되지 않을 경우 치사율이 높다. 저자들은 기저질환이 없던 69세 남자에서 C. fetus 심내막염을 경험하였기에 문헌고찰과 함께 보고하는 바이다. 환자는 발열로 내원하여 시행한 혈액배양 검사상 C. fetus가 동정되었고 경식도 초음파 검사상 삼첨판에 증식증이 발견되어 심내막염 진단하에 ceftriaxone에 이어 meropenem으로 총 4주간 항생제를 투여받고 호전되었다가 한달 후 다시 재발하였고 판막부전 소견 진행하여 삼첨판 치환술을 시행받고 전신상태 호전되어 퇴원하였다. Campylobacter fetus is a rare cause of endocarditis. To date, only about 30 cases of C. fetus endocarditis have been reported mainly in the elderly with chronic underlying illnesses. Most cases showed tendency to involve aortic valve. This report describes a case of native tricuspid valve infective endocarditis in a 69-year-old man without any underlying disease. Despite adequate antibiotic therapy for 4-weeks, endocarditis recurred and leading to surgical valve replacement.

靑代 川ᆞ湖ᆞ陝 交界 山間地域의 經濟開發과 그 성격

鄭哲雄,李俊甲 중국사학회 2006 中國史硏究 Vol.41 No.-

HPGe 검출기에 의한 지각방사선의 핵분광학적 연구

전재식,채하석,진응국,이철영,조혁,하정우 충남대학교 기초과학연구소 1992 연구논문집 Vol.12 No.-

고순도 Ge(HPGe) 검출장치를 사용한 현장측정을 통하여 지각방사선에 대한 핵분광학적 연구를 수행하였는바 지각방사선장의 핵분광학적 특성차이를 규명하기 위하여 지면의 자연방사성 핵종분포가 대표적 전형인 충남대학교 캠퍼스내 미경작 개활지 잔디밭과, 우라늄 함량이 높은 곳으로 알려진 괴산군 덕평리 지역 등 특이한 두 지역을 측정지점으로 선택하였다. 환산선량의 비교확인을 위하여 HPGe 분광측정은 3″ø×3″원통형 NaI(T1) 섬광검출기에 의한 분광측정과 동시에 수행하였으며 본 연구에 사용된 HPGe 검출기에 대한 스펙트럼-선량율 환산인자 G(E)는 감마선속이 검출기 축에 수직 입사하는 것으로 가정하고 Monte Carlo 방법으로 씨뮬레이션한 감응스펙트럼들을 사용하여 산출하였다. 이 G(E)를 사용하여 산출된 선량율(D˙_Ge)은, 이미 기준기급 전리함과의 비교 교정을 통하여 스펙트럼-선량 환산체계가 확립된 바 있는 NaI(T1) 검출기로 구한 선량율(D˙_NaI)과 만족스러운 일치를 보였으며 D˙_Ge와 D˙_NaI 사이의 상관계수는 +0.9988, 회귀 방정식의 기울기는 1.001을 나타내었다. 측정한 스펙트럼에서는 미미한 크기의 ^137Cs 감마선 피크가 확인되었으나 1960년대에 수행되었던 대기권 핵실험의 영향이나 Chernobyl 원전사고의 영향은 관측되지 않았다. Study of terrestrial gamma-rays was carried out by means of in-situ spectrometry using high purity germanium (HPGe) detector system. Two distinguishable fields of measurements, namely, uncultivated flat lawns in CNU campus where the distribution of natural radionuclides in the ground in known to be quite typical and well-known uranium rich area of Dukpyung-ri in Gwoesan-kun were selected in order to specify the difference in spectrometric characteristics of the fields. In-situ HPGe spectromety was accompanied by scintillation spectrometry with 3″ø×3″cylindrical NaI(T1) detector for comparative confirmation of derived dose rates from the spectra measured. Spectrum-dose rate conversion operator, G(E), of our particular HPGe detector was calculated using response spectra simulated by Monte Carlo method with an assumption of gamma-ray beams incident vertically to the detector axis. Resultant dose rates (D˙_Ge) showed satisfactory agreement with those obtained by NaI(T1) spectrometry and corresponding G(E) operation (D˙_NaI) of which system has been well-established through intercalibration with a reference ion chamber. Correlation coefficient and the slope of regression equation between D˙_Ge and D˙_NaI came out to be +0.9988 and 1.001, respectively. Though traceable height of ^137Cs gamma-ray peak was identified on the field spectrum, ground contamination of fission products released from atmospheric nuclear test performed in 1960s and possibly from Chernobyl accident was not observed as of today.

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.

실내사무환경의 환경성담배연기(ETS)의 지표물질에 관한 연구

하권철,백남원,박동욱,윤충식,김원,최상준,박지영,최인자,김신범,강태선 한국산업위생학회 2003 한국산업보건학회지 Vol.13 No.2

The purpose of this research is to evaluate indoor office environment using the concentrations of nicotine, 3-enthenyl-pyridine(3-EP), and respirable suspended particulate(RSP), which are indicators for environmental tobacco smoke(ETS) and the correlations between indicators and environmental conditions(smoking density, smoking index). The mean air charge per hour (ACH) in smoking rooms was 10.4 and most of the smoking rooms showed non-compliance withe ASHRAE standard value except only one smoking rooms. The concentrations of RSP, 3-EP, nicotine showed log=normal distributions, and became different statistically depending on smoking condition(p〈0.01). The geometric mean concentration of RSP in smoking room was 441.7 ug/㎡ that is far exceeded environmental standard(150 ug/㎡). This implies that fine particulate in smoking room should be carefully controlled considering smoking density and ventilation fate. The mean concentrations of nicotine and 3-EP were 93.4 ug/㎥, respectively. The correlation coefficients between RSP and SI, 3-EP and SI, and Nicotine and SI were 0.67, 0.84 and 0.74, respectively. The correlation coefficient between nicotine and 3-EP, nicotine and RSP, and RSP and 3-EP were 0.76,0.78 and 0.57 respectively.

노인외상환자의 예후 인자

문철규,전정민,최성혁,문준동,이성우,홍윤식 大韓應急醫學會 1999 대한응급의학회지 Vol.10 No.2

Background: It has been documented that certain prognostic factors may affect the outcomes of the old aged victims by trauma. Considering that trauma is the sixth most common cause of death in people over the age of 65 years and there is a rapid growth of elderly population, it is paramount to understand the prognostic factors when dealing with geriatric trauma patients. Hypothesis and Goals: It can be hypothesized that the prognostic factors should be determined independently between populations being consisted of different races, countries, socio-economic states, cultures, or so on. Thus, the study was designed to evaluate the factors affecting the outcomes of elderly Korean trauma patients. Methods: One hundred forty six patients aged over 65 years were retrospectively reviewed, who visited the Emergency Center of Korea University from January, 1997 to June, 1998. Of 146 patients, 7 were excluded due to discharge against advice or transfer to the other hospitals. Parameters analyzed were age, sex, mechanism of injuries, body region injured, Injury Severity Score (ISS), previous medical illness, hospital morbidity, duration of hospital stay, and cost. Each patient was classified into improved or not-improved group depending on the outcomes, and young-old or old-old group depending on the age. The factors affecting the hospital stay in improved patients were analyzed in the parameters of previous medical illness, hospital morbidity, multiple injuries, ISS, and age. All statistical tests were conducted with two-tailed levels of 0.05. Results: Of 139 patients, the mean age was 74±7.1 years, mean ISS 9.3±7.26, mean hospital stay 27±27.1 days. Most commonly injured body region was the extremities due to fall from a level surface. Rate of previous illness showed 0.94 medical diseases per person and were aggravated after trauma in 39 patients (60.9%). Hospital morbidity rate was 0.46 incidents per person. There were no differences in age and duration of hospital stay between the improved and the not-improved group. Substantial differences were noted in affected body region, incidence of previous illness, and hospital morbidity between the groups (p=NS). Not-improved group had higher ISS(p<0.05). ISS, previous illness and hospital morbidity affected the duration of hospital stay in the improved group. Hospital stay was 40±25.1 days in patients with ISS over 6 while 6±8.6 days in those with ISS 5(p<0.05). Hospital stay in the improved was 26±26.9 days while 31±24.8 days in the improved old-old group (p=NS). Hospital stay in the young-old minor trauma (ISS5) patients with previous illness and hospital morbidity was 26±10.1 days while 4±7.3 days in those without previous illness and hospital morbidity (p<0.05). Conclusion: Previous medical illness and hospital morbidity, not age, are predictive of outcomes of geriatric trauma patients with respect to hospital stay. As most of the hospital morbidity was a trauma-induced aggravation of previous medical illness and hospital morbidity contributing poor outcomes can be potentially avoidable, routine aggressive care for the geriatric trauma patients with previous medical illnesses is needed.

회전 초유체 ⁴He내에서 양자소용돌이의 평형

채건식,전철원,설정식 경남대학교 신소재연구소 1997 論文集 Vol.9 No.-

회전 초유체 ⁴Heso에서 중심에서 벗어난 양자소용돌이의 유체역학적 움직임이 소멸계수들과 열역학을 포함하는 초유체 유체역학 방정식을 사용하므로서 고찰된다. 평형상태로의 완화를 나타내는 시간상수에 대한 3-포논과정의 기여가 온도의 함수로서 계산되며 T의존을 가지는 것으로 나타난다. The hydrodynamic behavior of an off-center quantized vortex in rotating superfluid ^{4}He is investigated by using the superfluid hydrodynamic equation including dissipation coefficients and the thermodynamics. The contribution of three-phonon processes to the time constant that governs the relaxation to the equilibrium state is evaluated as a function of temperature, and is shown to have a T dependence.