1960년대 박정희 정부의 지역통치체계 재편과 ‘유지집단’의 활동

유정환(Yoo, Jeong-hwan) 한국역사연구회 2017 역사와 현실 Vol.- No.104

Examined in this article is how the Park Jeong-hi regime ruled the local communities in the 1960s, after the abolishment of the local self-governing system. The role of the local influential groups is highlighted here, in an effort to expand our attention from administrative areas to social sectors including private realms. After the local self-governing system was dismantled, ‘local influential groups’ organized ‘local prosperity associations’ and continued their activities. The Park Jeong-hi regime intended to recruit such efforts for their own political and administrative needs. As a result, a cooperative relationship between local influential groups, the Republican party, and administrative bodies in local regions were formed inside local communities, and the Park regime utilized it in its local ruling. ‘Local influential groups’ collected local opinions for the local administrative bodies, and obtained some leeway in their own activities. Meanwhile, cooperation with the Republican party allowed them to enforce their own influence throughout local communities and get their hands on more lucrative businesses. The Park regime used these influential groups to compensate for their own insufficient administrative control over local regions, and also consolidate their own political power and authority in the area. In order to do so, the regime recognized the local influential groups’ activities of negotiation, which in turn enabled those groups to bring at least some of the local issues and agendas to the central government, which ultimately strengthened the central government’s control of local regions. The situation actually helped the regime extend its time in power and propagate the need of ‘development’ throughout local communities (which stabilized the system in general in the process). But this kind of local control method began to change, when the Park government weakened the Communist party and reinforced local administration in the second part of the 1960s.

산성화된 산림토양에 석회 , 황산약토 및 복합비료 시비가 토양의 화학적 성질에 미치는 영향

유정환,변재경,김춘식,이충화,김영걸,이원규 ( Jeong Hwan Yoo,Jae Kyoung Byun,Choon Sig Kim,Choong Hwa Lee,Young Kul Kim,Won Kyu Lee ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.3

The effects of CaO, CaO+MgSO₄, and CaO+MgSO₄+compound fertilizers(NPK) on soil chemical properties of acidified forest soils were studied in Quercus spp. and Panes rigida stands in Mt. Namsan and Mt. Surak in urban areas, and Kwangnung in a mountain area. The soil samples were collected in November 1995 after every year fertilization from November 1991 through April 1995. The fertilizations affected soil chemical properties. Soil pH increased after fertilizations compared with control. However, the effect was different between the stand types and the areas. Organic matter and total nitrogen content were not changed, while exchangable rations such as calcium and magnesium increased after fertilizations. However, these ration concentrations after fertilizer treatments were lower in P. rigida than in Quercus spp. stands. These rations also showed increased leaching characteristics more in the urban area than in the mountain area.

춘천지방 소나무림에서 임내우 및 토양수내 이온동태

유정환,김영걸,이충화,변재경,최경,오정수,Yoo, Jeong-Hwan,Kim, Young-Kul,Lee, Choong-Hwa,Byun, Jae-Kyoung,Choi, Kyung,Oh, Jeong-Soo 한국생태학회 2000 Journal of Ecology and Environment Vol.23 No.5

본 연구는 강원도 춘천지방의 소나무임분을 대상으로 임내우와 토양수의 이온동태 특성을 알아보기 위하여 1998년 4월부터 10월까지 수행되었다. 임외우, 수관통과우, 수간류의 평균 pH는 수간류가 4.8로 가장 낮았으며 토양수 pH는 심토층으로 내려갈수록 높았다. 전기전도도는 수간류가 55.9 μS/cm로 가장 높았고, 토양수에서는 심토층으로 내려갈수록 낮아졌다. 양이온은 임외우·임내우에서 K/sup +/, Ca/sup 2+/, 토양수는 Ca/sup 2+/, 음이온은 임외우·임내우는 SO₄/sup 2-/, 토양수 NO₃/sup -/가 가장 높았다. This study was conducted to determine the ions dynamics in rainfall, throughfall, stemflow and soil solution of Pinus densiflora stands at Chunchon, Kangwon-Do. Ion concentration of stemflow was greater than that of rainfall and throughfall. The EC values of rainfall, throughfall and stemflow were 15.3 μS/cm, 23.9 μS/cm and 55.9 μS/cm, respectively. Average pH of soil solution was 4.8, 5.4, 5.5 and 5.8 at 10, 20, 30 and 50 cm depth, respectively. The cations were higher in K/sup +/ and Ca/sup 2+/ for rainfall, throughfall and stemflow, and in Ca/sup 2+/ for soil solution. The anions were higher in SO₄/sup 2-/ for rainfall, throughfall and stemflow, and in NO₃/sup -/ for soil solution.

산성화(酸性化)된 산림토양(山林土壤)에 석회(石灰), 황산고토(黃酸苦土) 및 복합비료(複合肥料) 시비(施肥)가 토양(土壤)의 화학적(化學的) 성질(性質)에 미치는 영향(影響)

유정환,변재경,김춘식,이충화,김영걸,이원규,Yoo, Jeong-Hwan,Byun, Jae-Kyoung,Kim, Choonsig,Lee, Choong Hwa,Kim, Young-Kul,Lee, Won-Kyu 한국산림과학회 1998 한국산림과학회지 Vol.87 No.3

산성화원 산림토양에 Ca, Ca+Mg, Ca+Mg+C.F. 등의 시비가 토양의 화학적 성질변화에 어떠한 영향을 미치는지를 알아보기 위해 도시지역인 남산과 수락산, 산림지역인 광릉의 참나무류 임분과 리기다소나무 임분을 대상으로 1991년 11월부터 1995년 4월까지 매년 시비한 후 시비 5년차인 1995년 11월에 토양의 화학적 성질을 조사하였다. 시비는 산림토양의 화학적 성질에 변화를 초래하였다. 토양 pH는 비료의 종류에 관계없이 상승하였으나 지역이나 임분에 따라 다른 경향을 보였다. 유기물, 전질소함량 등은 비료 종류간에 뚜렷한 차이가 나타나지 않았으나, 칼슘, 마그네슘, 염기총량은 시비 후 증가하였다. 치환성 양이온 함량은 리기다소나무 임분이 참나무류 임분에 비해 낮은 값을 보이고 있으며, 또한 도시지역이 산림지역에 비해 낮게 나타나 도시지역 산림에서 이들 양분의 용탈이 더 심한 것으로 나타났다. The effects of CaO, $CaO+MgSO_4$, and $CaO+MgSO_4$+compound fertilizers(NPK) on soil chemical properties of acidified forest soils were studied in Quercus spp. and Pinus rigida stands in Mt. Namsan and Mt. Surak in urban areas, and Kwangnung in a mountain area. The soil samples were collected in November 1995 after every year fertilization from November 1991 through April 1995. The fertilizations affected soil chemical properties. Soil pH increased after fertilizations compared with control. However, the effect was different between the stand types and the areas. Organic matter and total nitrogen content were not changed, while exchangable cations such as calcium and magnesium increased after fertilizations. However, these ration concentrations after fertilizer treatments were lower in P. rigida than in Quercus spp. stands. These rations also showed increased leaching characteristics more in the urban area than in the mountain area.

고정식 투명 평형조를 사용한 이산화탄소 / 알킬 알코올 계에 대한 고압 상평형 측정 연구

유정환,노민정,유기풍,이철수 ( Jung Hwan Ryu,Min Jeong Noh,Ki Pung Yoo,Chel Soo Lee ) 한국화학공학회 1996 화학공학의이론과응용 Vol.2 No.1

투석환자의 B형간염 바이러스 잠재감염률

유정환 ( Jeong Hwan Yoo ),황성규 ( Seong Gyu Hwang ),양동호 ( Dong Ho Yang ),손명수 ( Myung Su Son ),권창일 ( Chang Il Kwon ),고광현 ( Kwang Hyun Ko ),홍성표 ( Sung Pyo Hong ),박필원 ( Pil Won Park ),임규성 ( Kyu Sung Rim ) 대한소화기학회 2013 대한소화기학회지 Vol.61 No.4

Background/Aims: The prevalence of occult HBV infection depends on the prevalence of HBV infection in the general population. Hemodialysis patients are at increased risk for HBV infection. The aim of this study was to determine the prevalence of occult HBV infection in hemodialysis patients. Methods: Total of 98 patients undergoing hemodialysis in CHA Bundang Medical Center (Seongnam, Korea) were included. Liver function tests and analysis of HBsAg, anti-HBs, anti-HBc and anti-HCV were performed. HBV DNA testing was conducted by using two specific quantitative methods. Results: HBsAg was detected in 4 of 98 patients (4.1%), and they were excluded. Among 94 patients with HBsAg negative and anti-HCV negative, one (1.1%) patient with the TaqMan PCR test and 3 (3.2%) patients with the COBAS Amplicor HBV test were positive for HBV DNA. One patient was positive in both methods. Two patients were positive for both anti-HBs and anti-HBc and one patient was negative for both anti-HBs and anti-HBc. Conclusions: The present study showed the prevalence of occult HBV infection in HBsAg negative and anti-HCV negative patients on hemodialysis at our center was 3.2%. Because there is possibility of HBV transmission in HBsAg negative patients on hemodialysis, more attention should be given to prevent HBV transmission. (Korean J Gastroenterol 2013;61:209-214)

페로니켈슬래그 미분말 및 혼화재를 복합사용한 모르타르의 내구성 평가

유정환(Yoo, Jeong Hwan),남상구(Nam, Sang Koo),박상순(Park, Sang Soon) 한국콘크리트학회 2019 한국콘크리트학회 학술대회 논문집 Vol.31 No.1

탈황석고와 페로니켈슬래그 미분말을 혼합한 진동전압방식 모르타르의 강도 및 내구성에 관한 연구

유정환(Jeong-Hwan Yoo),박상순(Sang-Soon Park) 한국건설순환자원학회 2021 한국건설순환자원학회 논문집 Vol.9 No.4

본 연구에서는 산업부산물인 탈황석고 및 페로니켈슬래그 미분말을 혼합한 진동전압방식 모르타르의 강도 및 내구성의 평가를 실시한다. VR관 제작시 사용되는 석회석미분말 25% 치환을 기준으로 탈황석고 및 페로니켈슬래그 미분말을 복합치환하고, 진동전압방식을 사용하여 시편을 제작하였다. 강도발현 특성을 평가하기 위해 휨 및 압축강도를 실시하였으며, 내구성을 평가하기 위해 염소이온침투저항성 및 내황산저항성 시험을 실시하였다. 휨 및 압축강도에서 혼화재 중 탈황석고의 비율이 20∼60% 범위에서 강도가 향상되었으며, 탈황석고의 비율이 20∼80% 범위에서 염소이온침투저항성 시험에서 통과 전하량이 감소하는 경향을 보였다. 내황산저항성은 탈황석고의 비율이 40%인 경우 침지기간에 따른 강도 및 질량 감소율이 줄어들었다. 강도 및 내구성 실험결과를 기초로 탈황석고 및 페로니켈슬래그 미분말을 적절하게 혼합해서 사용한다면 강도 및 내구성에서 성능 개선 효과를 기대할 수 있다고 판단된다. In this study, strength and durability evaluations are performed on vibrated-rolled method mortar mixtures containing desulfurized gypsum and ferronickel slag powder. Desulfurized gypsum and ferronickel slag fine powders were substituted for 25% limestone fine powders used in the manufacture of VR tubes, and mortar specimens were prepared using vibrated-rolled method. Accordingly, flexural and compressive strengths were performed to evaluate the strength, and chlorine ion penetration resistance and sulfuric acid resistance tests were performed to evaluate durability. Flexural and compressive strength were improved in the range 20 to 60% of desulfurized gypsum among admixtures, and the amount of passing charge decreased in the choride ion penetration resistance test in the range of 20 to 80% of desulfurized gypsum. As for the resistance to sulfuric acid, when the proportion of desulfurized in the admixture was 40%, the strength and weight change rate according to the immersion period was reduced. Appropriate use of desulfurized gypsum and ferronickel slag powder is expected to improve performance in terms of strength and durability.

급성 췌장염 환자에서 양성자펌프억제제의 효과-예비 연구

유정환 ( Jeong Hwan Yoo ),권창일 ( Chang Ii Kwon ),유광호 ( Kwang Ho Yoo ),윤해리 ( Har Ry Yoon ),김원희 ( Won Hee Kim ),고광현 ( Kwang Hyun Ko ),홍성표 ( Sung Pyo Hong ),박필원 ( Pil Won Park ) 대한소화기학회 2012 대한소화기학회지 Vol.60 No.6

목적: 급성 췌장염의 발생에는 다양한 기전이 관여하고 있고 활성산소가 중요한 역할을 한다고 알려져 있다. 널리 사용되고 있는 양성자펌프억제제인 pantoprazole은 췌장의 소화효소의 분비를 간접적으로 억제하는 작용 외에도 활성산소에 대한 항산화효과와 항염증효과를 가지고 있다. 이번 연구는 이런 pantoprazole의 사용이 급성 췌장염의 임상 경과에 어떤 영향을 미치는지 알아보고자 하였다. 대상 및 방법: 2011년 3월부터 2012년 5월까지 급성 췌장염으로 입원한 환자 중 위식도 역류질환이 동반된 40명을 대상으로 전향적 무작위 배정으로 연구하였다. 20명씩 두 군으로 나누어 한 군에서는 pantoprazole을 투여하였고 다른 군에서는 사용하지 않았다. Pantoprazole은 금식기간 동안에는 하루 2번 40 mg을 정맥 내로 투여하였고 식사 시작 후에는 하루 2번 40 mg을 퇴원할 때까지 경구 투여하였다. 다른 급성 췌장염의 치료는 양 군에서 동일하게 사용되었다. 혈청 amylase, lipase 등의 혈액학적 검사와 APACHE II 점수를 연속적으로 측정하였고 입원 당시 복부 전산화단 층촬영을 시행하여 CT 중증도 지수를 측정하였다. 결과: 양 군 간에 기준 특성, 혈액검사, APACHE II 점수, CT 중증도 지수에서 유의한 차이를 보이지 않았다. Pantoprazole 투여군에서 평균 입원일은 7.4일, 경구 섭취까지 걸린 시간은 69.0시간, 복통이 호전될 때까지 걸린 시간은 59.7시간이었다. APACHE II 점수는 입원 당시에는 3.15이었고 퇴원 시에는 2.35이었다. Pantoprazole을 투여하지 않은 군에서는 평균 입원일은 7.6일, 경구 섭취까지 걸린 시간은 71.4시간, 복통이 호전될 때까지 걸린 시간은 61.8시간이었다. APACHE II 점수는 입원 당시에는 4.4이었고 퇴원 시에는 2.85이었다. 모두 양 군에서 통계학적으로 유의한 차이를 보이지 않았다. 결론: Pantoprazole을 이용한 치료가 급성 췌장염의 경과에 어떤 개선도 보이지 못했다. 그러나 예비 연구라는 점을 고려했을 때, 더 큰 규모의 전향적 무작위 배정 임상연구로 검증이 필요하겠다. Background/Aims: Oxygen free radicals play an important role in acute pancreatitis. Pantoprazole as a proton pump inhibitor (PPI) has pancreatic anti-secretory effect and a pronounced inhibitory reactivity towards hydroxyl radicals. The objective of the study was to investigate the effect of pantoprazole on the course of acute pancreatitis. Methods: We conducted a prospective randomized trial involving 40 patients with acute pancreatitis. Patients were divided into two groups. One group received PPI and the other group did not receive PPI. In the PPI group, patients received pantoprazole 40 mg intravenously twice a day for fasting time, and then 40 mg orally twice a day until discharge. Results: There were no significant differences in baseline characteristics and laboratory markers between two groups. In the pantoprazole group, mean hospital stay was 7.4 days, time to start oral intake was 69.0 hours, and time to pain relief was 59.7 hours. Acute physiology and chronic health evaluation (APACHE) II score was 3.15 at admission day and 2.35 at discharge. On the other hand, in the non-pantoprazole group, mean hospital stay was 7.6 days, time taken to start oral intake was 71.4 hours, and time taken to pain relief was 61.8 hours. APACHE II score was 4.4 at admission and 2.85 at discharge. However, there were no significant differences between two groups. Conclusions: Treatment with pantoprazole did not have influence on the clinical course of acute pancreatitis. But, considering it was a pilot study, large scale prospective trials will be needed.

현장 하수관거 장기 내구성 모니터링 평가 방법

유정환 ( Yoo Jeong-hwan ),박상순 ( Park Sang-soon ),김윤태 ( Kim Yun-tae ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.2

본 연구는 현장에 설치 된 하수관거 내부 상태 평가를 위하여 CCTV 카메라 기반의 자주식 로봇차를 투입하여 촬영 및 녹화를 진행하였고, 장비 차량에 탑재된 TV를 통해 하수관거의 돌출부, 파손, 누수여부 등을 판단 할 수 있었다. 또한 경사계와 스트레인게이지를 하수관거에 부착하여 관로의 이상침하 및 구배를 분석하고, 변형률 데이터를 취득 할 수 있는 자동화 계측시스템을 구성하여 현장 하수관거 장기 내구성 모니터링 평가 방법을 제시한다.