시계열모형을 이용한 선거개입의 경제적 영향분석

최성관,Choi, Sung-Goan 한국데이터정보과학회 2000 한국데이터정보과학회지 Vol.11 No.2

이 연구의 목적은 '우리나라의 경우 선거시기를 전후하여 정부여당이 선거에서의 승리를 목적으로 주기적으로 경제문제에 개입하여왔는가?' 라는 질문에 대해 통계자료에 근거하여 답해 보려는 것이다. 이러한 연구목적을 효과적으로 달성하기 위해 여러 접근방법 중 단순하면서도 절약적인 방법으로 알려진 ARIMA-Intervention모형을 이용하였다. The purpose of this study is to analyse the economic effects of General Elections in Korea, in other words, to test the Political Business Cycle hypothesis using ARIMA-Intervention Analysis.

피지선모반의 임상 및 병리조직학적 고찰

최성관,전재복 ( Sung Koan Choi,Jae Bok Jun ) 대한피부과학회 1988 대한피부과학회지 Vol.26 No.3

Clinical observations were made on 63 cases on nevus sebaceus of Jadasshon. 52 of 63 cases were diagnosed on the basis of clinical and histopathologic findings during a period of 19 years from January 1969 to July 1987 at the Department of Dermatology, Kyungpook National University Hospital, with the remaining 11 cases diagnosed at other skin clinics in Taegu. Histopathologic examinations were made on 51 selected cases of the 63. The results were as follows : Clinical observations 1) The percentage of patients with nevus sebaceus of Jadasshon of total new outpatients was 0.12%. Of the 63 cases, males numbered 38 and females, 25, with a sex r atio of 1.5: 1. 2) Patients when first seen were most commonly in the age group of 10~19. 3) The most favorate sites were the scalp(83.3%) and face(13.3%). 4) The average size of the lesions was 2.23cm * 3.24cm with no difference among the age groups. Histopathological observations 1) The apparent proliferation of sebaceous glands was observed in 32 of 51 cases(62.7%). The degree of proliferation markedly increased in the age group of l0~19 and slightly decreased beyond this age group. Apocrine glands were present. in 17(33.3%), with a higher number of glands seen in the age group of 10~19. Immature hair follicles were found in 38(74.5%), with no changes according to aging. 2) The epidermal changes such as acanthosis(86.3%), papillomatosis(70.6%), hyperkeratosis(78.2%) and hypergranulosis(78.2%) predominated in the age group of 10-19, and severe but more gradual changes were noted 20 years of age on. 3) Inflammatory cell infiltration of moderate to marked degree was noticeable in 27(53%). The older the patients were, the more pronounced dermal infiltration was. 4) Six of 51 cases were complicated with basal cell carcinoma(3) and syringocystadenoma papilliferum(4). The tumors, which occurred beyond 30 years of age, showed a marked inflammatory cell infiltration.

X선 촬영실 내 공간선량의 분포와 거리 역자승 법칙과의 관련성

최성관(Seong-Kwan Choi) 한국콘텐츠학회 2013 한국콘텐츠학회논문지 Vol.13 No.8

본 연구는 손, 머리, 복부 등의 X선 촬영 시에 발생되는 공간선량이 어느 정도인지를 알아보고, 산란선에 의한 공간선량의 강도가 “거리 역자승 법칙”에 의해 감쇠하는지를 파악했다. 첫째, 손처럼 X선 산란선 발생량이 적은 촬영의 공간선량은 대부분 “거리 역자승 법칙”에 근접한 감쇠가 이루어지면서, 2m 거리에서는 전혀 측정되지 않았다. 둘째, 머리나 복부처럼 X선 산란선 발생량이 많은 촬영의 공간선량은 조사야 중심을 기준으로 30cm에서 1m 거리까지는 “거리 역자승 법칙”보다 더 높은 비율의 감쇠가 이루어지고, 1m에서 2m 거리까지는 “거리 역자승 법칙”에 의한 감쇠가 이루어졌다. 따라서 X선 촬영실 내에서는 손 촬영의 경우 조사야 중심으로부터 적어도 2m 이상 떨어져 있어야 하고, 머리나 복부 촬영의 경우 촬영실 내 모든 공간에서 보호용구를 이용한 X선 피폭 방어조치가 요구된다. In the present study, space doses generated during X-ray radiography of hand, head, and abdomen, etc. were examined and whether the intensity of space doses of scattering rays is attenuated by the “inverse square law of distance” was figured out. First, the space doses of X-ray with small amounts of generated scattering rays such as hand radiography were mostly attenuated by the “inverse square law of distance” and were not detected at all at a distance of 2m. Second, the space doses of X-ray with large amounts of generated scattering rays such as head or abdomen radiography attenuated in higher rates than the rates under the “inverse square law of distance” at distances ranging from 30cm to 1m from the center of the irradiation field and were attenuated by the “inverse square law of distance” at distances ranging from 1m to 2m. Therefore, in X-ray rooms, the subject should be at least 2m away from the center of the irradiation field in the case of hand radiography and X-ray exposure prevention actions using protective devices are required in the entire spaces of the X-ray rooms in the case of head or abdomen radiography.

여성 외음부에 발생한 배아형 횡문근육종

최성관(Sung Koan Choi),성기영(Gi Young Seong),김도원(Do Won Kim),정상립(Sang Lip Chung) 대한피부과학회 1988 대한피부과학회지 Vol.26 No.6

We report a case of embryonal rhabdomyosarcoma with palpable right inguinal lymph node in a 6-year-old girl which developed rapidly on the right labia minora over a period of 2 montha. Histopathological study showed characteristic findings of spindle shaped rhabdomyoblast with hyperchromatic nuclei and cytoplasmicprocesses. After a preoperative chemotherapy with vincristine, actinomycin D, and cytoxan, the size of the mass was reduced, and lymph nodes were not palpable. And then, simple vulvectomy. postoperhtive cheirnatherapy and radiotherapy were done,

지역이벤트의 지역경제 파급효과

최성관 ( Sung Goan Choi ) 한국경제통상학회 (구 한국경상학회, 한국국민경제학회) 2006 경제연구 Vol.24 No.4

지역투입산출모형의 작성방법 연구

최성관 ( Sung Goan Choi ) 한국경제학회 2010 經濟學硏究 Vol.58 No.2

방사선이 조사된 생쥐의 혈청성분 변화

최성관(Seong-Kwan Choi) 대한방사선과학회(구 대한방사선기술학회) 2008 방사선기술과학 Vol.31 No.3

  본 연구는 방사선 조사에 의해 생쥐의 혈청성분이 어떠한 변화를 일으키는가를 구명하는데 있고, 이를 위해 10 MeV급 Linac 방사선치료장치를 사용하여 3 Gy 방사선을 1회 전신 조사한 생쥐의 혈청(serum)을 채취하여 14가지 생화학적 분석을 실시한 후 paired t-test를 실시하였다.<BR>  그 결과 다음의 3가지 혈청성분에서 유의한 변화가 있다는 사실을 확인하였다.<BR>  첫째, glucose 측정에서 정상대조군(normal control group)의 185.43 ± 14.93보다 방사선조사군(irradiation group)이 220.00 ± 17.58로 높게 나타나 평균값에 매우 유의한 차이를 보였다(p < 0.001).<BR>  둘째, BUN(blood urea nitrogen) 측정에서 정상대조군의 19.61 ± 1.65보다 방사선조사군이 15.70 ± 1.48로 낮게 나타나 평균값에 유의한 차이를 보였다(p < 0.01).<BR>  셋째, albumin 측정에서 정상대조군의 3.19 ± 0.34보다 방사선조사군이 2.89 ± 0.25로 낮게 나타나 평균값에 유의한 차이를 보였다(p < 0.05).<BR>  결론적으로, 3 Gy 방사선이 조사된 생쥐의 혈청은 glucose, BUN(blood urea nitrogen), albumin 등 3가지 성분에서 유의할만한 변화를 일으켰다.   This study is aimed to investigate the change of serum compositions of mice caused by the irradiation. The 3 Gy radiation with 10 MeV Linac was once irradiated to whole body of mice and their serum was collected to conduct 14 biochemical analyses. With the collected data, t-test was performed.<BR>  As the result, the significant change was confirmed in the following 3 compositions. First, the glucose level of the normal control group was 185.43 ± 14.93, but the irradiation group was found to be 220.00 ± 17.58, which shows significant difference(p < 0.001). Second, the BUN(blood urea nitrogen) measurement showed lower value(15.70 ± 1.48) in the irradiation group than the normal control group(19.61 ± 1.65), which indicates the significant difference in mean value (p < 0.01). Third, the measurement of albumin resulted in lower value of 2.89 ± 0.25 in irradiation group than 3.19 ± 0.34 of the normal control group, which shows the significant difference in mean value(p < 0.05).<BR>  In consequence, the serum of the mice irradiated with 3Gy radiation caused significant change in 3 compositions; glucose, Blood urea nitrogen(BUN) and albumin.

음경의 비성병성 경화성 림프관염 2예

최성관(Sung Koan Choi),최인철(In Chul Choi),정상립(Sang Lip Chung),서순봉(Soon Bong Suh) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.6

We report two cases of nonvenereal sclerosing lymphangitis of the penis in a 34-year old man and a 28-year-old man. This disorder is an uncommon condition characterized by asymptomatie, firm, cord-like lesion of unknown etiology. Histopathologic findings reveal hypertrophy and sclerosis of lymphatic vessel walls, and some cases show thrombus formation within dilated vessels. Both cases had typical clinical and histopathologic features. In case I, the lesion resolved spontaneously on several occasions for 10 years. Therefore we argue that some individual rnay be predisposed to develop the condition, perhaps because of anatomical variation.

X선 촬영에서 조사야 크기에 따른 산란선량의 변화

최성관(Seong-Kwan Choi) 한국콘텐츠학회 2013 한국콘텐츠학회논문지 Vol.13 No.3

본 연구에서는 손, 머리, 복부 등에 대한 X선 촬영 시행 시 조사야 크기를 최적화할 경우와 최대화할 경우 검사목적부위로부터 30cm 거리에서의 X선 산란선량이 각각 어느 정도인지를 알아보았다. 그 결과 손, 머리, 복부 등에 대한 X선 산란선량은 첫째, 소인촬영의 경우 조사야 크기를 최적화하였을 때 각각 0.08 μSv, 4.39 μSv, 5.56 μSv로 나타났고, 조사야 크기를 최대화하였을 때 각각 0.58 μSv, 33.47 μSv, 35.93 μSv로 나타났으며, 둘째, 성인촬영의 경우 조사야 크기를 최적화하였을 때 각각 0.40 μSv, 14.51 μSv, 18.86 μSv로 나타났고, 조사야 크기를 최대화하였을 때 각각 2.78 μSv, 107.40 μSv, 117.52 μSv로 나타났다(P<0.001). 결론적으로, X선 촬영 시 조사야 크기를 필요한 만큼만으로 최대한 줄여주어 최적화시켰을 때에 최대화시켰을 때보다 피사체 주변의 X선 산란선 발생량은 약 6∼7배 정도 감소하였다. The purpose of this study is to investigate the scattered dose of X-ray at a distance of 30cm from the area to be examined when X-ray field is the most optimized and maximized when X-ray is performed on hand, skull and abdomen. As a result of scattered dose of X-ray on hand, skull and abdomen, first, when X-ray field was the most optimized upon adult X-ray examination, it was 0.08 μSv, 4.39 μSv and 5.56 μSv, respectively. When x-ray field was maximized, it was 0.58 μSv, 33.47 μSv and 35.93 μSv, respectively. Second, when X-ray field was the most optimized upon pediatric X-ray examination, it was 0.40 μSv, 14.51 μSv and 18.86 μSv, respectively. When x-ray field was maximized, it was 2.78 μSv, 107.40 μSv and 117.52 μSv, respectively(P<0.001). As a result, when the size of X-ray field was decreased down to be necessary and optimal upon X-ray examination, emission of scattered X-ray around specimen is reduced approximately 6?7 times as much as that when it was maximized.

우리나라 제1차 금속제품산업의 부식비용 추정

최성관(Sung-Goan Choi) 한국경제통상학회 2014 경제연구 Vol.32 No.2

이 논문은 산업연관표를 이용하여 제1차 금속제품산업의 부식비용을 추정한 것이다. 분석결과 우리나라 제1차 금속제품산업의 부식비용은 2005년 기준 해당산업 GDP의 15.50%로 추정되었으며, 타산업과 비교할 때 부식비용이 높은 것으로 나타났다. 국가별로 비교하면 제1차 금속제품산업 GDP 대비 해당산업의 부식비용 비중이 한국은 15.50%(2005년), 미국은 5.87%(1998년), 일본은 18.25%(1997년)로 나타났다. 향후 관련 산업의 기술혁신, 생산성 향상, 다양한 비용절감 등을 통해 비용을 감소시키는 것이 제1차 금속제품산업의 경쟁력 강화의 주요과제가 될 것이다. 이 연구는 기존연구에서 간과되었던 부식으로 인한 사회적 비용에 주목하고 투입산출모형을 이용하여 해당산업의 부식비용을 추정하였으며, 이 연구의 결과가 향후 해당산업의 경쟁력 강화방안 논의의 기초자료로도 활용될 수 있을 것이다. The purpose of this study is to estimate the corrosion cost in primary metals industry in Korea using 2005 input-output tables. The difference between GDP of the economy as it exists and the economy as it would exist if corrosion did not exist determines the total cost of corrosion. Compare to the costs which were 5.87% of primary metals sector GDP(l998 base year) in U.S.A. and 18.25% of primary metals sector GDP(l997 base year) in Japan. the corrosion cost in primary metals industry in Korea was 15.50% of primary metals sector GDP(2005 base year) in Korea. These results will provide a basis for development of technological, legislative, and other initiatives to promote effective economic savings of corrosion costs.