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공공하수처리시설 유입수 및 방류수에서 TOC와 유기물질 관리지표간의 상관성 분석
손동진,정동환,박규홍,Son, Dong-Jin,Jeong, Dong-Hwan,Park, Kyoo-Hong 중소기업융합학회 2021 융합정보논문지 Vol.11 No.4
2021년부터 총유기탄소(TOC)가 국내 공공하수처리시설의 새로운 유기물질 기준 지표로 선정됨에 따라, 기존 유기물질 관리지표(DOC, BOD5, CODMn, CODCr)와의 상관성 분석을 통해 TOC의 적용 타당성 평가가 필요하다. 본 연구에서는 500개소 공공하수처리시설을 공정 및 시설용량에 따라 구분하여 유입 및 방류수에 대한 유기물질 관리지표간의 상관성 분석을 실시하였다. 다른 유기물질 관리 지표 대비 유입수와 방류수 내 화학적 산소요구량(CODMn)와 TOC간 농도비와 결정계수(R2)는 상대적으로 높았다. 유기물질 관리지표간의 상관성 결과는 새로이 기준으로 도입된 TOC와 관련된 다양한 연구 수행에 기초자료로 활용될 것으로 기대된다. As the total organic carbon (TOC) becomes a new water quality standard as an organic matter (OM) index for public sewage treatment facilities (PSTFs) in Korea from 2021, a comparison study needs to be conducted by examining the correlation between TOC and the existing OM indices (DOC, BOD5, CODMn, CODCr). 500 PSTFs were categorized by process configuration and capacity, and correlation between OM indices in influent and effluent was analyzed. The CODMn/TOC showed higher correlation than other OM indices. This results can be used to basic data for various research associated with TOC.
동적 패널 모형을 이용한 서울 오피스 공실률 결정 메커니즘
손동진 ( Dong Jin Son ),이현석 ( Hyun Seok Lee ) 한국부동산분석학회 2015 不動産學硏究 Vol.21 No.2
This research investigates decision mechanisms of the Seoul office market and its effect on the vacancy rate. The research is based on the configured panel data for 240 individual offices of three major business districts in Seoul from 2003 to 2013. It demonstrates the effect of vacancy rate on the operation structure and their interaction factors by using the long and short-term balancing model of Fisher(1993). System GMM, which can effectively control autocorrelation and potential endogeneity, is used for the analysis of the panel data. The result of the analysis verifies that there are close connections between captial and space markets in the Seoul office market while they are interacting with each other. In this process, it confirms the role of vacancy rate as a arbitrator or a middle mediator while being influenced by rent, macroeconomics, supply and demand of office space, rather than property aspects of individual offices.
신탁재산의 유동화에 있어 사해신탁취소권과도산절연 부인권에 대한 고찰
손동진 ( Dong Jin Son ),이현석 ( Hyun Seok Lee ) 한국부동산분석학회 2014 不動産學硏究 Vol.20 No.2
Once new trust is created, the created trust asset is insulated from the truster and any bankruptcy of the trustee, while it does not belong to the truster`s asset. Hence, the general creditor of truster and trustee are not able to collect a debt from the trust asset which has a strong legal advantage by an independent protection regardless of any bankruptcy or reorganization process. However, this advantage will be effective only on the assumption that the trust was established without any flaws during the establishing process. When a fraudulent act happens, a creditor or a bankruptcy administrator can revoke fraudulent act or fraudulent trust and incapacitate the effect of insulation from bankruptcy by means of a right to deny. That`s why it is required to apply a law for a harmony of benefit and balance among truster, trustee, creditor and administrator to avoid abuse of a right from each interested parties. If the rule of enforcing a law is not definite, it could be difficult to secure a legal stability due to many victims. Our trust law and the Supreme Court precedents have constantly recognized the interest of trust and assured the protection and independence of the trust asset up to date. This study reviewed the Supreme court precedents and legal experts` opinions, then proposed an alternative about the issue.
시간가변 자연공실률 추정을 통해본 서울시 지역별ㆍ등급별 오피스 시장
손동진(Dong Jin Son),이현석(Hyun Seok Lee) 건국대학교 부동산도시연구원 2014 부동산 도시연구 Vol.6 No.2
본 연구는 서울시 오피스시장의 지역별, 등급별 자연공실률 추정을 통하여 오피스 시장의 특징을 살펴보았다. 추정을 위한 자료는 2003년 1분기부터 2013년 2분기까지 분기별 시계열 데이터를 사용하여 시간의 변화에 따른 추이를 함께 고려하였다. 연구결과는 외국의 선행연구 결과와 같이 자연공실률의 수준에 각 지역별 차이가 확인되었고 실제공실률과의 차이도 확인되었다. 아울러 오피스 등급별 차이도 확인하였다. 서울시 전체적으로 자연공실률 평균은 6.7% 수준으로 추정되었고, 실제공실률 평균은 3.3%로 그 차이는 3.4%이며 실제공실률이 보다 낮은 수준을 유지해 온 것으로 확인되었다. 2008년 글로벌 금융위기 전ㆍ후로 나누어보면, 금융위기 직전에 두 공실률의 차이가 크다가 직후부터 그 간격이 점차 좁혀지면서 2013년 2분기에 와서는 실제공실률이 자연공실률 수준에 근접하여 평균 자연공실률 수준에서 동조화 현상을 보이고 있다. 이러한 동조화 상황에서 실제공실률이 자연공실률보다 높을 경우에는 시장이 침체되고 공실관리가 중요해지는 임차인 위주의 시장이 예상된다. 따라서 향후 서울시 오피스 시장에서 지역별, 규모별 공실률 추이를 고려하는 투자와 관리가 더욱 필요하다. This study observed the characteristics of Seoul office market by region and grade based on natural vacancy rate. The data for estimation was considered together with the transition by temporal change as well as quarterly time series data from the Q1 to Q2 in 2013. The study ascertained, similar to the results of previous foreign study, the regional gap in accordance with the level of the natural vacancy rate as well as the gap with the actual vacancy rate. In addition, the difference by the grade of office was verified. Overall, the average of natural vacancy rate was estimated at 6.7% while the average of the actual vacancy rate is 3.3% in Seoul. So it was confirmed the gap of actual vacancy rate was maintained 3.4% lower than the natural vacancy rate. Dividing before and after the global financial crisis in 2008, the gap between two vacancy rates was big just prior to the crisis, however the gap was narrowing down after the crisis. Furthermore the actual vacancy rate is getting closer to the natural vacancy rate, and the synchronization phenomenon at the natural vacancy rate was occurred in Q2 in 2013. In the situation of the synchronization, if the actual vacancy rate is higher than the natural vacancy rate, the tenants-driven market is expected to happen where the market is depressed and the importance of vacancy management is increased. Thus, the investment and management are obviously required considering the development-oriented externally-managed REITs are expected to engage in development projects more stably.