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이재홍,이재홍,조정은 한국증권학회 2016 Asia-Pacific Journal of Financial Studies Vol.45 No.2
This study examines the effects of controlling shareholders’ ownership–control wedge on firms’ overinvestment practices. In addition, it further investigates the incentive effects of controlling shareholders’ cash flow rights on firms’ overinvestment. We find a non-monotonic relation between controlling shareholders’ ownership–control wedge and a firm’s overinvestment. Specifically, the relation between controlling shareholders’ wedge and overinvestment is significant for certain wedge levels. Thus we conclude that controlling shareholders with certain levels of wedge expropriate minority shareholders’ benefits since the marginal benefit exceeds the marginal cost. We also document that cash flow rights are effective to reduce a firm’s overinvestment to certain levels.
이재홍 한국게임학회 2002 한국게임학회 논문지 Vol.2 No.1
The big difference of game scenario writers from ordinary scenario writers is the creativity of interactive game element. Game scenario writers should complete scenario form before making conti of game production, develop new item that is the essence of game and be able to write mulit-scenario for diverse story developments. Also, he should have the ability to advise on effective arrangement for sound effect to game designer.
D2EHPA 및 Dithizone 에 의한 납의 추출평형
이재홍,남세종 한국화학공학회 1990 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.28 No.3
납 수용액으로부터 di(2-ethylhexyl) phosphoric acid(D₂EHPA)-carbon tetrachloride와 diphenylthiocarbazone(dithizone)-chloroform을 사용한 추출평형을 측정하였다. D₂EHPA일 때 적용한계 부하비 0.05 이하에서 추출화학종은 PbR₂(RH)₂이고 평형상수는 3.0×10^(-3)이었으며, 추출제 dithizone일 때 적용한계 부하비 0.03 이하에서 추출화학종은 Pb(Dz)₂이고 평형상수는 1.2×10^(-1)이었다. 한계 부하비를 넘으면 추출화학종과 평형상수는 D₂EHPA일 때 (PbR₂)_n(RH)₂, 6×10^(-3)이고 dithizone일 때[Pb(Dz)₂]_n, 2.2[㎥/㏖]로 각각 변하였다. 식초산 완충용액을 수용액상에 가하면 추출상수는 다소 감소하였고 유기상에 계면활성제 Span #80을 첨가하면 평형상수는 약간 증가하였다. Measurements of the extraction equilibrium of lead acetate aqueous solution with di(2-ethylhexyl) phosphoric acid (D₂EHPA) in carbon tetrachloride, and diphenylthiocarbazone (dithizone) in chloroform were carried out at 25℃. Over the range of loading ratios less then 0.05 for D₂EHPA and 0.03 for dithizone, the extracted organic metal species and equilibrium constants were found to PbR₂(RH)₂. 3.0×10^(-3) for D₂ZEHPA and to Pb(Dz)₂. 1.2×10^(-1) for dithizone. Upon increasing the loading ratio above the threshold value, the extracted chemical species and equilibrium constants were estimated to (PbR₂)_n(RH)₂. 6×10^(-3) for D₂EHPA, and to [Pb(Dz)₂]_n, 2.2[㎥/㏖] for dithizone. The equilibrium constants were found to decrease upon adding of acetic buffers, and to a little increase by addition of Span#80.
의료정보 분야 대학 졸업생들에 대한 산업체의 직무수행능력 및 교육과정 요구에 관한 연구
이재홍,최준영 한국전자통신학회 2016 한국전자통신학회 논문지 Vol.11 No.1
This study is to develop the curriculum for training students with practical business skills which medical business needs. We surveyed businesses which have employed graduates who majored in medical information. The survey was conducted into the expectation of business for graduates, their job competence and business needs for curriculum utilizing the self-reported questionnaire. We analyzed correlation, frequency and regression among job class, business types and job positions of those surveyed. The result shows that medical information businesses express high expectation in personality education rather than major knowledge and think that field practice is important in the college curriculum. We expects the study will contribute positively to improve the curriculum for raising the employment rate of college graduates. 본 연구는 의료정보 분야 산업체에서 요구하는 현장 실무 전문인력을 양성하기 위한 교육과정 개발을 위해 졸업생들이 취업하고 있는 의료정보 분야 산업체를 대상으로 설문조사를 통해 수행되었다. 설문조사는 의료정보 분야 산업체에서 요구하는 졸업생에 대한 기대정도, 직무수행능력, 교육과정에 대해 자기평가 기입식 방법을 활용하였으며, 직종업종직위별로 상관분석, 빈도분석, 회귀분석을 하였다. 본 연구를 통해 의료정보 분야 산업체에서는 대학이 전공에 대한 전문지식 보다는 개인의 인성교육에 대한 기대가 컸으며, 현장실습교육과정을 중요하게 생각하는 것으로 나타났다. 대학에서 추진하고 있는 취업률 향상을 위한 교육과정 개편에 본 연구결과가 긍정적으로 반영될 것으로 기대한다.
요추 추간판탈출증 환자에 대한 통합적 중재접근의 효과: 단일사례연구
이재홍,손종찬,구성린,이석훈,이동훈,신용웅,최자은,한재경,김동한,김정민,김민철,장진아,황성현,권원안,Lee, Jae-Hong,Son, Jong-Chan,Koo, Seong-Rin,Lee, Seok-Hun,Lee, Dong-Hun,Shin, Yong-Wung,Choi, Ja-Eun,Han, Jae-Kyoung,Kim, Dong-Han,Kim, Jeong-Mi 대한고유수용성신경근촉진법학회 2012 PNF and Movement Vol.10 No.2
Purpose : The purpose of this case report was to examine the effects of intergrative intervention approach on a patient with lumbar herniated nucleus pulposus (HNP). Methods : The subject was a 53 years old woman with lumbar HNP. The subject received conventional physical therapy combined with exercise therapy and manual therapy. Pain on visual analog scale (VAS), finger to floor (FTF), lumbar lateral flexion, L5 motor, and straight Leg-Raising (SLR) were evaluated at baseline and after 4 weeks. Results : The change of VAS, FTF, left lateral flexion, and right lateral flexion were decreased (9 vs. 5, 41 vs, 25, 56 vs. 42, 54 vs. 41, respectively) and the change of L5 motor and SLR were increased (Fair vs. Fair+, 60 vs. 75, respectively). Conclusion : Our findings suggest that Integrative intervention may be considered in patient with lumbar HNP.
이재홍,박찬범 대한전자공학회 1995 전자공학회지 Vol.22 No.4
날로 심화되고 있는 교통혼잡과 이에 따른 경제적, 시간적 손실을 해결할 방안이 요구되고 있다. 이를 위한 도로 증설 등 교통시설의 확충과 병행하여 첨단기술을 이용하여 기존 도로의 운영효율을 극대화하는 방법이 모색되고 있다. 이것을 포괄적으로 첨단도로교통체계(IVHS:Intelligent Vehicle Highway System)라 하며, 이것은 교통관제, 교통정보, 차량운영, 차량제어, 대중교통 등의 분야로 구분된다. 이 글에서는 첨단도로교통체계의 정의 및 그 구성요소에 대하여 살펴보고, 첨단도로 교통체계를 위한 통신의 미국, 유럽, 일본 등의 연구개발 사례를 소개한다. 또한, 국내에서의 첨단도로교통체계를 위한 통신의 연구동향과 개발방향에 대하여 검토한다.
Occurrences and Results of Acute Kidney Injury after Endovascular Aortic Abdominal Repair?
이재홍,박근명,정성택,조원표,홍기천,전용선,조순구,이정범 대한혈관외과학회 2017 Vascular Specialist International Vol.33 No.4
Purpose: Acute kidney injury (AKI) is an important postoperative complication that may impact mortality and morbidity. The incidence of AKI after elective endovascular aneurysm repair (EVAR) is not known well. The aim of this study is to assess the incidence of AKI after elective EVAR and examine the impact of AKI. Materials and Methods: Data were collected and analyzed retrospectively from 78 elective EVARs for abdominal aortic aneurysm (AAA) among 102 total cases of conventional EVAR performed in Inha University Hospital from 2009 to 2015. The primary endpoint was incidence and risk factors of AKI. Secondary endpoints included drop in estimated glomerular filtration rate (eGFR) and the mortality of AKI. Results: We included 78 patients (17 females, 21%; mean age, 73.9±12.5 years; mean AAA diameter, 59.3±8.9 cm), 11 (14.1%) of whom developed AKI. Within 48 hours, those with AKI experienced a decrease in eGFR from 65.5±21.2 to 51.2±19.6 mL/kg/1.73 m2, and those without AKI showed a change from 73.1±9.2 to 74.2±10.7 mL/kg/1.73 m2. There were no patients who required dialysis during follow-up (mean, 24.2±18.0 months). Development of AKI was related to operation time (odds ratio [OR], 2.024; 95% confidence interval [CI], 1.732-4.723; P<0.010) and contrast dose (OR, 3.192; 95% CI, 2.182-4.329; P<0.010). There were no differences in mortality between the 2 groups (P=0.784). Conclusion: The incidence of AKI after EVAR was related to operation time and contrast dose, but was not associated with medium-term mortality.