국내외 건설부문 기업결합성과 분석

최종수,Choi, Jong-Soo 한국건설관리학회 2005 건설관리 : 한국건설관리학회 학회지 Vol.6 No.5

기업 인수/합병의 성과에 대한 평가는 인수/합병 발표일 전후 단기간에 걸쳐 실현되는 경제적인 이익을 측정하는 방법과 인수/합병 종료 후의 장기 경영성과를 평가하는 방법으로 대별된다. 본 연구에서는 최근 국내외에서 급증하고 있는 건설분야 인수/합병 중 선정된 샘플을 대상으로 위에서 기술된 전자의 방법을 중심으로 전반적인 성공여부를 분석/평가하였다. 또한 인수/합병이 기업전략의 이행이라는 관점에서 사업다각화 방향에 따른 성과를 비교/분석하였다. 분석결과에 의하면 국내외 건설분야 인수/합병의 단기성과는 다소간의 경제적 이익을 실현한 것으로 평가되었으나 통계분석의 관점에서 성공적이라는 결론을 내리기 어려운 것으로 나타났다. 한편, 사업다각화 방향에 따른 성과의 비교에서는 유사부문 및 타 부문으로의 사업다각화 사이에 뚜렷한 차이가 없는 것으로 나타났다. The success of mergers and acquisitions(M&A) have been evaluated by either measuring ex ante expectations for the specified time period(Window) or assessing long term-based post operating performance (ex post operating performance). In this study, utilizing cumulative abnormal return(CAR) method, M&As which are observed in both domestic and U.S. construction industries were analyzed then research outcomes are compared. Analysis results indicate that stockholders of public construction companies did not realize significant economic gains from M&As. In other words, there was no synergistic gains from the construction M&As. Also, no significant performance difference was observed between related and unrelated diversifications.

소형 원심형 홴의 형상변수가 성능에 미치는 영향에 대한 실험적 연구

최종수,이욱,Choi, Jong-Soo,Rhee, Wook 한국유체기계학회 1999 한국유체기계학회 논문집 Vol.2 No.1

The performance of a centrifugal fan depends on the dimensional parameters of impeller, such as the inlet and exit diameter, area ratio, relative flow angles to the blade, and the number of blades. These design parameters, however, are inter-related, so it is very difficult to identify the effect of each parameter on the fan performance. In this experimental study the effects of the design parameters on the performance of a small centrifugal impeller being used for vacuum cleaners are investigated. A total of 30 shrouded impellers with 120mm diameter were tested and the results were non-dimensionalized to compare their performance.

시공방법 개선사례 조합에 의한 원가절감 가능성 평가

최종수,최영준,채성태,유성원,Choi, Jong-Soo,Choi, Young-Jun,Chae, Seong-Tae,Yoo, Sung-Won 한국건축시공학회 2009 한국건축시공학회지 Vol.9 No.5

현재까지 국내 건설사들은 공법의 개선, 제안 등 다양한 방법을 통해 공사비 원가 절감을 도모하여 왔다. 그러나 그러한 노력들은 각 건설사별로 이루어져 왔으며 성과를 업계 차원에서 공유하는 것으로는 연결되지 못한 실정이다. 따라서 본 연구에서는 최근 완공된 공동주택 1개동 및 지하주차장의 건설 공사비를 기준으로 민간부문에서 적용된 다양한 원가절감 사례들을 조합하여 적용할 경우 기대되는 공사비 원가 절감수준을 분석하였다. 분석결과에 의하면 아파트공사의 경우 기존 대비 3.77%의 공사비 절감을, 지하주차장공사의 경우 7.33%, 그리고 아파트 및 지하주차장을 합한 총 공사비 차원에서는 5.26%의 절감이 가능한 것으로 분석되었다. The primary focus of this study has been directed towards assessing the potential impact of construction method improvement on a reduction in project cost. A total of 90 actual application cases were collected from a public organization and private construction firms, and 32 cases were used in analysis by adopting a synthetic approach. The level of cost reduction was measured in terms of material and labor cost by comparing the existing method and the improved method. An analysis of the results indicates that project cost can be reduced by up to 5.26 percent compared to a normal project by adopting a synthetic approach. Additional benefits include the assurance of uniform quality, savings in terms of labor and/or materials, and improved productivity. The potential of the applicability of this approach to other types of buildings and the implications of research findings were discussed in detail.

건축물 해체공사의 통합 안전관리 가이드라인 개발 및 적용성 평가

최종수,허성태,고원준,이희민,Choi, Jong-Soo,Heo, Seong-Tae,Go, Won-Joon,Lee, Hee-Min 한국건설관리학회 2010 한국건설관리학회 논문집 Vol.11 No.6

Safety management for building deconstruction works has been received extremely limited attention in the domestic construction society. Lack of systematic safety management practices and defective education system lead to the high level of fatality compared to that of advanced countries. Under the above domestic deconstruction environment, the authors intend to develope an integrated safety management guidelines that covers both mechanical and partial deconstruction works. Research outcome includes such specific educational materials as safety manual, checklists, pocket pamphlets, and e-manuals. Furthermore, to validate the applicability of the above materials, questionnaire survey and interviews were conducted. Detailed descriptions are provided for each research outcome. 국내 건축물 해체공사의 안전관리 분야는 연구, 제도정비 및 실무 차원에서 소외되어온 경향이 있다. 해체공사의 수행과정에 있어서 체계적이지 못한 안전관리 실태, 부실한 교육체계, 활용할 수 있는 교육용 교재의 미흡 등은 안전사고의 빈도 및 사고발생시 중대사고로 이어지는 주요 원인이 되며 그 수준은 외국의 경우와 비교하여 볼 때 대단히 높은 실정이다. 본 연구에서는 이러한 국내 해체업계 현황의 개선을 목표로 기계식 전면해체공사 및 리모델링을 위한 부분해체공사를 포괄하는 통합 안전관리 가이드라인을 개발하였다. 구체적인 연구 성과물은 안전관리매뉴얼, 체크리스트, 포켓용 팸플릿, 전자매뉴얼 등이며, 연구성과의 검증을 위하여 해체공사 유경험자를 대상으로 실무에 대한 적용성 평가를 수행하였다.

건설현장 탁수제어를 위한 원통형 여과장치의 처리효율 분석

최종수 ( Jong Soo Choi ),공영산 ( Young San Kong ),이정민 ( Jung Min Lee ),방기웅 ( Ki Woong Bang ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.5

A cylinder-shaped filter was developed to manage the runoff from construction sites. Compressed air was used for back- washing and pore sizes of filter were 23μm and 46μm. The turbid water was prepared using sediments in construction sites. The grain size analysis showed that grains smaller than 38μm and larger than 335μm in size constituted 34.4% and 37.6%, respectively. Removal efficiency of the filter on turbidity, SS, COD, TN and TP showed 25~37%, 20~40%, 50~55%, 23~27% and 14~20%, respectively, whereas their removal efficiecy by using coagulant PAC showed 77~84%, 70~83%, 53~60%, 27~36%, and 59~75%, respectively. The filtration time was determined to be around 10 to 20 minutes. Back-washing for 10 seconds by pressurized air resulted in a satisfactory regeneration efficiency. According to the aforementioned test results, the cylinder- shaped filter is effective in reducing turbidity and would be suitable for practical application in construction sites and farms.

산업용 퍼지제어 시스템의 표준화 동향

최종수(Jong-Soo Choi),이기범(Gi-Bum Lee),권오신(Oh-Shin Kwon) 대한전기학회 1999 대한전기학회 학술대회 논문집 Vol.1999 No.7

시각 모델을 고려한 인지 대비 측정 및 영상품질 향상 방법에 관한 연구

최종수 ( Choi Jong Soo ),조희진 ( Cho Heejin ) 한국품질경영학회 2016 품질경영학회지 Vol.44 No.3

Purpose: The purpose of this study was to propose contrast metric which is based on the human visual perception and thus it can be used to improve the quality of digital images in many applications. Methods: Previous literatures are surveyed, and then the proposed method is modeled based on Human Visual System(HVS) such as multiscale property of the contrast sensitivity function (CSF), contrast constancy property (suprathreshold), color channel property. Furthermore, experiments using digital images are shown to prove the effectiveness of the method. Results: The results of this study are as follows; regarding the proposed contrast measure of complex images, it was found by experiments that HVS follows relatively well compared to the previous contrast measurement. Conclusion: This study shows the effectiveness on how to measure the contrast of complex images which follows human perception better than other methods.

예방진단기술을 활용한 GIS 고장예방대책

최종수(jong-soo Choi),김종구(jong-gu Kim),박준성(jun-sung Park) 한국조명·전기설비학회 2009 한국조명·전기설비학회 학술대회논문집 Vol.2009 No.10월

공채의 중립성 가설: 이론 및 실증서베이

최종수 ( Jong Soo Choi ) 한국재정정책학회 2007 財政政策論集 Vol.9 No.2

This study reviews the literature on the Debt Neutrality Hypothesis(DNH). The issue of how fiscal policy affects the macroeconomy has for long divided economics profession. Traditional discussions insisted that a bond issue has a wealth effect and consequently people will increase consumption rather than savings. Opposing this argument, the DNH, usually called Ricardian Equivalence, has been one of the most debated issues of modern macroeconomics and the subject of a large number of theoretical and empirical studies. The crucial question is widely known as whether government bonds represent net wealth. In essence, the main idea of the DNH asserts that a bond issue and lump sum taxes are equivalent methods of financing a given amount of public expense. In other words, it is government spending that matters not the method of financing it. This public expense financing irrelevance is an extension, applied to the public sector, of the Modigliani-Miller theorem. According to the literature survey, the debate about the theoretical and empirical validity of the DNH is far from resolved. To a large extent, the discrepancies in empirical results reflect differences in sample periods, theoretical models, econometric techniques and methods of empirically measuring different variables. The policy implications of the DNH and the tradeoffs that it might offer to the policy maker are extremely important and therefore a careful assessment of its analytical as well as empirical validity is of much relevance.

건설안전분야 : 기계식 해체공사의 안전관리 매뉴얼 개발

최종수 ( Jong Soo Choi ),허성태 ( Seong Tae Heo ) 한국안전학회(구-한국산업안전학회) 2009 한국안전학회지 Vol.24 No.1