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부동산 규제 및 완화 정책이 아파트 매매가격에 미치는 영향 분석 : 서울과 수도권 아파트 가격을 중심으로
서재형 ( SEO JAE HYUNG ),배광빈 ( BAE KWANG BIN ) 단국대학교 융합사회연구소 2022 공공정책과 국정관리 Vol.16 No.3
This study analyzed the relationship between the real estate regulatory policy and easing policy, and apartment sales prices in the metropolitan area and Seoul, using apartment price indexes and macroeconomic indicators from January 2004 to December 2021. As a result of the analysis, the real estate regulatory policy had a statistically significant positive effect on the apartment sales price in six metropolitan cities, the Seoul apartment sales price, and the Gangnam apartment sales price. Contrary to the policy goals of the real estate regulation policy, this has the effect of raising the sale price of apartments in six metropolitan cities, Seoul apartments and Gangnam apartments, showing a paradox of regulation. On the other hand, the real estate easing policy was found to have a statistically significant wealth effect on the sale price of apartments in the metropolitan area, apartment sales prices in six metropolitan cities, Seoul apartment sales prices, and Gangnam apartment sales prices, and Gangbuk apartment sales prices.
가시화기법을 이용한 고정자장에서 이중원관내 자성유체의 열유동 특성에 관한 연구
김형진(Hyung-Jin Kim),서재형(Jae-Hyeong Seo),김대완(Dae-Wan Kim),이무연(Moo-Yeon Lee),서이수(Lee-Soo Seo) 한국자기학회 2013 韓國磁氣學會誌 Vol.23 No.1
This article is experimentally to investigate thermal-flow characteristics of the magnetic fluid for concentric annuli under externally fixed magnetic fields using visualization technique. Temperatures of the inner tube and outer tube in the tested concentric annuli were constantly maintained at both 30℃ and 25℃ and the middle tube was filled with the magnetic fluid. Magnetic field was uniformly applied using 4 permanent magnets at 4 directions of the concentric annuli. As a result, the thermal-flow characteristics of the magnetic fluid for concentric annuli could be controlled by directions of the external magnetic fields.
회전수 및 자기장강도 변화에 따른 이중원관내 자성유체의 자연대류 열전달 특성에 관한 실험적 연구
김형진(Hyung-Jin Kim),서재형(Jae-Hyeong Seo),김대완(Dae-Wan Kim),이무연(Moo-Yeon Lee),서이수(Lee-Soo Seo) 한국자기학회 2013 韓國磁氣學會誌 Vol.23 No.2
The objective of this study is experimentally to investigate natural convective heat transfer characteristics of the ferrofluid for a concentric annuli under rotating magnetic field with variations of the revolution and the magnetic field strength. The rotating magnetic field was provided by induction motor with 6 poles and 3 phases and the revolution and the magnetic field strength were controlled by an inverter driver and a voltage meter, respectively. Temperatures of the inner pipe and the outer pipe in the tested concentric annuli were maintained at 30℃ and 25℃, respectively, during the test and the direction of the rotating magnetic field was a counterclockwise. As a result, the natural convective heat transfer characteristics of the ferrofluid for a concentric annuli were increased with the rise of the revolution and magnetic field strength due to the increased heat dissipation between hot side and cold side of the concentric annuli.