유방암 환자의 수술 중 방사선치료 시 피부선량 측정을 통한 안전성 평가

정인호,김준원,박광우,하진숙,전미진,조윤진,김세준,김종대,신동봉,Jung, In Ho,Kim, Joon Won,Park, Kwang Woo,Ha, Jin Sook,Jeon, Mi Jin,Cho, Yoon Jin,Kim, Sei Joon,Kim, Jong Dae,Shin, Dong Bong 대한방사선치료학회 2015 대한방사선치료학회지 Vol.27 No.1

목 적 : 유방암 환자를 대상으로 Intrabeam$^{TM}$ system을 이용한 수술 중 방사선치료(Intraoperative Radiotheray, IORT)를 국내에 처음 도입하는데 있어 광자극형광선량계(Optically Stimulated Luminescent Dosimeter, OSLD)를 이용한 피부선량측정을 통해 Intrabeam$^{TM}$ system의 안정성을 평가하고자 한다. 대상 및 방법 : 본원에서 2014년 8월부터 2015년 2월까지 유방보존술(breast-conserving surgery, BCS)후 Intrabeam$^{TM}$ system을 이용하여 수술 중 방사선치료(IORT)를 시행한 30명의 유방암 환자를 대상으로 진행하였다. 처방선량은 applicator 표면을 기준으로 20 Gy로 설정하여 1 cm 떨어진 지점에 약 5 Gy의 선량이 전달될 수 있도록 하였다. 종양 크기에 따라 applicator의 크기를 결정하였고 치료시간은 applicator의 크기에 따라 18~40분으로 설정되었다. 피부 절개면에서 Superior, Inferior, Lateral, Medial 4방향에 applicator를 중심으로부터 0.5 cm와 1.5 cm지점에 광자극형광선량계(OSLD)를 각각 부착하였다. 각 방향에 따라 U1,U2(Superior), D1,D2(Inferior), L1,L2(Lateral), M1,M2(Medial)로 총 8지점을 지정하였다. 각 지점에서의 측정값과 모든 지점의 평균값 및 최고값, 최저값을 산출하여 비교분석 하였다. 결 과 : Intrabeam$^{TM}$ system 50kVp X-ray source를 이용한 수술 중 방사선치료(IORT)시 OSLD의 측정 결과 U1 $2.23{\pm}0.80Gy$, U2 $1.54{\pm}0.53Gy$, D1 $1.73{\pm}0.63Gy$, D2 $1.25{\pm}0.45Gy$, L1 $1.95{\pm}0.82Gy$, L2 $1.38{\pm}0.42Gy$, M1 $2.03{\pm}0.70Gy$, M2 $1.51{\pm}0.58Gy$로 나타났으며 maximum값은 U1지점에서 4.34 Gy, minimum값은 M2지점에서 0.45 Gy로 나타났다. 전체 환자 중 13.3 %(N=4/30) 환자에서 4 Gy를 초과하는 측정값이 나타나 그 원인을 분석하였다. 결 론 : 본 연구를 통해 현재 본원에서 도입한 Intrabeam$^{TM}$ system을 이용한 수술 중 방사선치료(IORT)는 모든 환자의 피부선량값이 5 Gy미만으로 측정된 것으로 보아 그 안전성이 확인되었다. 피부선량이 4 Gy를 초과한 환자의 데이터 분석을 통해 breast volume이 상대적으로 작은 사이즈의 유방암환자의 경우 피부선량이 증가하는 경향을 보여 수술 중 방사선 치료 대상 환자 선정시 종양의 크기와 위치 뿐만 아닌 breast volume 값 등을 고려하여 피부에 전달되는 선량값이 기준값을 초과하지 않도록 주의 하여야 한다. Purpose : We investigated the safety of Intrabeam$^{TM}$ system, X-ray unit for Intraoperative Radiotheray (IORT) by measuring surface dose using Optically Stimulated Luminescent Dosimeter(OSLD). Materials and Methods : 30 patients were selected, who were in breast cancer patients and had an operation of breast conserving surgery (BCS). At the inner surface of tumor bed, 20 Gy were described, and 5 Gy at 1cm depth from the inner surface. Along the size of tumor bed which could be decided after resection of tumor, the size of applicator were determined. Usual treatment time were from 18 to 40 minutes. For the measurement of surface doses, OSLD were placed at superior(U1,2), inferior(D1,2), lateral(L1,2) and medial(M1,2) directions from the center of applicator. Each direction, two OSLD were placed at 0.5 cm and 1.5 cm from the center. Mean, maximum, and minimum doses were analyzed to be compared. Results : Mean values were U1 $2.23{\pm}0.80Gy$, U2 $1.54{\pm}0.53Gy$, D1 $1.73{\pm}0.63Gy$, D2 $1.25{\pm}0.45Gy$, L1 $1.95{\pm}0.82Gy$, L2 $1.38{\pm}0.42Gy$, M1 $2.03{\pm}0.70Gy$, and M2 $1.51{\pm}0.58Gy$. Maximum values were 4.34 Gy at U1, and Minimum values were 0.45 Gy at M2. 13.3 % of patient (4pts out of 30) were reported that surface dose were over 4 Gy. Conclusion : The fact that skin dose of all patients were less than 5 Gy based on OSLD measurement showed the safety of Intrabeam$^{TM}$ system. In the relatively small breast volume, the tendency that surface dose was increased had been shown, which was analyzed by the data of patients who irradiated over 4Gy at skin surface. Therefore, for appropriate indication for IORT, it is suggested that breast volume as well as the size and position of tumor should be carfully considered.

토양오염공정시험기준과 국제표준간의 분석방법 차이가 유류 정량에 미치는 영향

정인호,이군택,이원석,김용훈,김보현,김지인,김보경,Jung, In-Ho,Lee, Goon-Taek,Lee, Won-Seok,Kim, Yong-Hoon,Kim, Bo-Hyun,Kim, Ji-In,Kim, Bo-Kyong 한국지하수토양환경학회 2012 지하수토양환경 Vol.17 No.4

The main objective of this study is to assess the compatibility between Korean ministry of environment (KME) standard and ISO (KS I ISO) standard for the determination of BTEX and TPH content in soil. We carried out comparison analysis for both methods using CRM and matrix spiked samples. In case of GC-MS analysis for BTEX, we got statistically (significance level: 0.05) the same results from KME standard (ES 07600.1) and ISO standard (KS I ISO 15009). However, it showed statistically (significance level: 0.05) different results when TPH was analyzed by KME standard (ES 07552.1) and ISO standard (KS I ISO 16703). To clarify the reason why both methods produced different results for TPH content, we also did some additional experiments in terms of differences in extraction, clean-up and target hydrocarbon range. Extraction with polar and non-polar compounds mixed solvent (acetone+n-heptane) of KS I ISO 16703 showed higher extraction efficiency than with only non polar solvent (dichloromethane) extraction of ES 07552.1 by about 9%. While column type clean-up of KS I ISO 16703 showed the reduction in TPH content between before and after clean-up, batch type of clean-up of ES 07552.1 did not show any changes in TPH content through clean-up process. The target hydrocarbon range of ES 07552.1 and KS I ISO 16703 is $C_8{\sim}C_{40}$ and $C_{10}{\sim}C_{40}$, respectively. From this point of view, kerosene and JP-8 contaminated soil showed higher RPD (relative producibility deviation) values between results by both method than that of lubricant or diesel contaminated soil. The higher content of hydrocarbon ($C_8{\sim}C_{10}$) in kerosene and JP-8 played an important role in increasing RPD values in addition to the effects caused by different solvents and clean-up method. Consequently, it was concluded that both methods (ES 07552.1 and KS I ISO 16703) were not compatible.

신규주택수요자의 주거입지 결정요인에 관한 연구

정인호(Jung, In Ho),서충원(Suh, Chung Won) 한국부동산학회 2012 不動産學報 Vol.51 No.-

1. CONTENTS (1) RESEARCH OBJECTIVES This study analyzed factors influencing housing consumers’ decision-making factors in selecting a residence, not in existing urban districts but in newly constructed districts through city development projects or housing land development projects. (2) RESEARCH METHOD For an analytical method, in the case a dependent variable is categorical, a logistic regression analysis was used to explain a functional relation between a dependent variable and one or more independent variables. (3) RESEARCH FINDINGS An empirical analysis showed, first, that choose or monthly renters had a higher probability to select a residential location in the suburbs compared to house owners. Second, the analysis found that house owners’ biggest factor in deciding a residential location in the suburbs was “convenience” followed by “pleasantness(natural environment)”, “investment value” and “security facilities.” 2. RESULTS These results show that convenience and pleasantness are prior to investment value in deciding a residential location due to a decline in housing prices, and that renters(low-incomers, younger people) are moving from downtown to the suburbs due to high residential expenses caused by a rise in chonse prices.

협상전략과 협상성과와의 관계에서 신뢰도, 커뮤니케이션, 협상태도의 조절효과에 관한 연구

정인호(Jung, In Ho),이재훈(Rhee, Jaehoon) 한국경영교육학회 2011 한국경영교육학회 학술발표대회논문집 Vol.2011 No.12

불확실한 환경하에서 기업이 고성과를 달성하기 위해서는 협상이 매우 중요하다. 특히 기업의 지속적인 성장을 위해서는 비즈니스 협상전략이 기업 경영의 핵심적인 경쟁요소가 될 수 있어 효과적인 협상전략은 경영자, 리더, 관리자에게 더욱 중요해지고 있다. 따라서 본 연구는 기업의 협상전략이 협상성과에 미치는 영향을 살펴보고 이러한 협상전략과 협상성과간의 관계에서 신뢰도, 커뮤니케이션 및 협상태도 등이 조절변수로서 기능을 하는지를 분석하였다.분석결과, 첫째, 협상자의 협상전략 유형은 협상성과에 영향을 미칠 것이라는 가설을 검증한 결과, 문제해결전략만이 협상성과에 영향을 미치는 것으로 나타났다. 둘째, 신뢰도와 협상태도는 순응전략과 공격전략과 협상성과 간의 관계에 있어 조절변수로서 역할을 하는 반면, 문제해결전략과 타협전략과 협상성과간의 관계에서는 조절변수로서 역할을 하지 못하고 있다. 커뮤니케이션은 협상전략 중 순응전략과 협상성과간의 관계를 조절하는 것으로 나타났으며, 문제해결전략, 타협전략 및 공격전략과 협상성과간의 관계에서는 조절변수로서 역할을 하지 못하고 있음을 본 연구에서 보여주고 있다. The importance of negotiation cannot be overemphasized to improve the essential corporate performance in the era of uncertain business environment. The business negotiation can be the key competitive factor for the corporate’s continuous growth, and thus effective negotiation strategy is becoming more and more important for managers and leaders. So, this study discusses the relationship between negotiation strategy types and satisfaction with negotiation and whether trust, communication and negotiation attitude can function as moderators between negotiation strategy types and satisfaction with negotiation.First, results showed that only the problem solving strategy of four strategy types has an effect on the satisfaction with negotiation. This result, which is in accordance with the previous studies, implies that the problem solving strategy which provides the target and the priority the negotiators want to achieve in order to solve problems by satisfying both sides has a positive effect on the satisfaction with negotiation. On the other hand, it turns out that the compromise strategy, compliance strategy and aggressive strategy don’t have any significant influence on the negotiation satisfaction. Accordingly, negotiators need to adopt the problem solving strategy which can pursue their mutual benefits in addition to the attitudes of understanding counterparts by having conversation since the choice of negotiation strategies could cause severe economic and social chaos.Secondly, results also showed that trust and negotiation attitude play as moderators between aggressive strategy and compliance strategy and satisfaction with negotiation while communication plays as a moderator between compliance strategy and negotiation satisfaction. On the contrary, three moderating variables don’t have any impact on the relationship between either problem solving strategy or compromise strategy and negotiation satisfaction. Particularly, it is found that three moderating variables don’t have any effect on the relationship between problem solving strategy and negotiation satisfaction because problem solving strategy pursues a firm negotiation value with the objective of having intimate relationship with counterparts in the choice of realistic negotiation strategies. Therefore, negotiators need to have firm trust, proactive communication and negotiation attitude in order to maximize satisfaction with negotiation and more broadly negotiation performance and then, it could result in the change of perception about the negotiation and the pursuit of their mutual benefits.

SNCR 환원제 주입용 Injector의 분무 및 NOx 저감특성

정인호(In Ho Jung),노남선(Nam Sun Roh),김광호(Kwang Ho Kim),김성수(Sung Soo Kim),이상길(Sang Kil Lee),김동찬(Dong Chan Kim),신대현(Dae Hyun Shin) 大韓環境工學會 2001 대한환경공학회지 Vol.23 No.9

LED 보안등의 광균일도 향상을 위한 비구면 Mirror형 광학 설계에 관한 연구

정인호(In-Ho Jung),윤철용(Cheol-Yong Yoon),예인수(In-Soo Ye),현동훈(Dong-Hoon Hyun) 한국생산제조학회 2011 한국생산제조학회지 Vol.20 No.1

농업부산물의 Black Cabonization을 통한 입상형 완효성 농자재 사용에 따른 비료 사용량 절감효과 구명 및 경제성 평가

정인호 ( In Ho Jung ),나홍식 ( Hong Ski Na ),조현종 ( Hyun Jong Cho ),유한나 ( Han Na Yoo ),강민승 ( Min Seung Kang ),이현구 ( Hyun Goo Lee ),이승하 ( Seung Ha Lee ),신중두 ( Joung Du Shin ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-

본 연구는 농업부산물인 왕겨 및 야자수 바이오차를 Black carbonization하여 유기화합물에 대한 흡착력을 120배 증가시켜 NH₄⁺-N을 천천히 방출시키는 활성바이오차 특성을 이용한 친환경 농자재의 경제성 평가를 위해 본 연구를 수행하였다. 입상형 완효성 농자재 제조공정에서 비료 원료인 요소와 황산칼륨을 분쇄하고 조립제인 dolomite를 이용하여 조립하였다. 활성바이오차 함량은 부피비로 0~50%, 조립제는 0~20% 함량으로 입상화 정도를 조사한 결과 활성바이오차의 함량이 낮고, 조립제 함량이 높아질수록 조립 정도가 높아지는 특성을 보였다. 생물검정을 통한 최적 함량으로 선정된 왕겨 활성바이오차 5% 혼합한 입상형 완효성 농자재의 비료 사용량 절감효과를 규명하기 위하여 농촌진흥청 작물별 비료사용처방을 기준으로 하여 밑거름을 40~100% 수준으로 차등적으로 처리하였으며, 동시에 입상형 완효성 농자재를 같이 시비하였고, 동일한 기준으로 관행 방법으로 시비와 시판 완효성비료를 권장 사용량 160kg/10a로 처리한 처리구와 비교하였다. 생육조사 결과 엽장, 엽폭, 엽색도는 처리구간 큰 차이를 보이지 않았으며, 수량조사 결과 밑거름 100 %, 80% 시비 처리구에서 관행대비 11.1%, 4.6% 높은 수량을 나타내었으며, 밑거름 60% 시비 처리구 에서 관행과 유사하게 나타났다. 이를 통하여 왕겨 활성바이오차 5% 혼합한 입상형 완효성 농자재의 효과로 관행 처리보다 시비횟수 66.7% 절감과 시비량 52.8% 절감효과가 있었으며, 시판 완효 성비료보다 시비량 37.6% 절감효과가 있는 것으로 판단되었다. 경제성 평가는 2019 농업과학기술 분석 기준자료집을 기준으로 하여 경제성 분석을 실시한 결과 관행 대비 비료 비용이 33,997원 /10a 절감되는 것으로 나타났으며, 추비 시비에 따른 노동비 57,096원이 발생하지 않아 총 91,093 원/10a의 비용이 절감되는 것으로 나타났으며, 기존 시판 중인 완효성비료 대비해서는 87,588원 /10a이 절감되는 것으로 나타났다.

자산재평가가 기업에 미치는 영향분석

정인호(Jung, In Ho),서충원(Suh, Chung Won) 한국부동산학회 2010 不動産學報 Vol.43 No.-

1. CONTENTS (1) RESEARCH OBJECTIVES The purpose of this study was to reassess the property in terms of corporate management is to analyze how effective. (2) RESEARCH METHOD This study was focused on T-test, Multiple regression analysis. The difference between fair value and book value by the revaluation has been verified by the T-test. Whether the company's financial health also improved by T-test analysis. Finally, the impact of revaluation on the company were reviewed through multiple regression analysis. (3) RESEARCH FINDINGS Assets Revaluation of the financial health of a company or business may affect the value is about to review. 2. RESULTS The difference between fair value and book value, but revaluation of the company's financial health was not affected by improvements. Fair value due to revaluation of the company were affected.

주택전세 자기자금이 주택매매가격에 미치는 영향에 관한 연구

정인호(Jung, In-Ho) 한국부동산학회 2014 不動産學報 Vol.57 No.-

전세금 자기자본이 주택 매매가격에 미치는 효과에 관한 실증분석결과 전세금 자기자본 비율이 높을수록 주택 매매가격은 상승하는 것으로 나타났다. 이는 전세가격이 상승하는 상황에서 전세금 자기자본 비율이 높으면 전세수요가 매매수요로 전환될 수 있지만, 자기자본 비율이 낮으면 매매수로 전환이 되지 못하는 것을 의미한다. 즉 전세가구에 대해 저리자금 대출지원은 전세수요를 유발시켜 다시 전세가격을 상승시키는 문제를 발생시킴으로 전세가격을 안정시키기 위해서는 수요분산을 위해 매매전환 유인 정책이 필요하다고 사료된다. 1. CONTENTS (1) RESEARCH OBJECTIVES The purpose of this study is to draw implications for stability of the Jeonse market and the property sales market with analysis of effects of the ratio of a tenant's own jeonse deposit on property sales price. (2) RESEARCH METHOD This study tries to analyze whether the ratio of a tenant's own jeonse deposit has effects on property sales price through empirical analysis conducted with literature review and survey. The literature review on reports or previous studies for the relationship between jeonse deposit and property sales price constructs the theoretical base and the research model and the empirical analysis is conducted with multiple-regression analysis. (3) RESEARCH FINDINGS According to the empirical study on effects of the ratio of a tenant's own jeonse deposit on property sales price, it is found that high ratio of a tenant's own jeonse deposit results in increased sales price of property. This implicates that the demand of jeonse can be converted to purchase of property if there is high ratio of a tenant's own jeonse deposit while such conversion does not happen if the ration of tenant's own jeonse deposit is low. 2. RESULTS The phenomenon that property sales price decreases while jeonse price increases ruins the housing stabilization. This means that the demand of jeonse may not be converted to the demand of property sales even if the ratio of jeonse price/sales price is high. To convert the demand of jeonse to the demand of property sales, it is necessary for the ratio of a tenant's own jeonse deposit to be high. Therefore, the government shall prepare a policy to increase the ratio of a tenant's own jeonse deposit rather than focusing on increase of jeonse loan amount for housing stabilization.

8학군 주택매매가격과 전세가격의 인과성 연구

정인호(Jung, In Ho),서충원(Suh, Chung Won) 한국부동산학회 2011 不動産學報 Vol.45 No.-

1. CONTENTS (1) RESEARCH OBJECTIVES The purpose of this study is verify causality of Housing price and Chonsei price in 8th school district affects in different school district. (2) RESEARCH METHOD This study was focused on an actual analysis. The data for this analysis were collect from the Kookmin Bank. This time series data was composed housing price index and Chonsei price index. Especially this study used to the Granger Causality Test.(GCT) (3) RESEARCH FINDINGS In the results of this study, The Chonsei price of 8th school district affect spaciously than Housing price of 8th school district and Chonsei price affect one-sidedly the Housing price in school district. 2. RESULTS This study offers two Implications of the housing policy in Korea. 1) To stabilize housing market, Nation keep down Chonsei price. 2) To stabilize Chonsei price, Nation have to supply national rental housing and shift housing.