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장재일(Jang Jae-Il),안건혁(Ahn Kun-Hyuck) 대한국토·도시계획학회 2008 國土計劃 Vol.43 No.7
Many studies have focused on the housing demand forecasting in order to articulate the housing policies. However, in most cases, forecasting methods used in their studies have not fully considered the variables which may affect housing demand, and furthermore, some of them have shown complicated formulas which are not easily understandable. The housing demand forecasting in this study is based on the concept of the per capita living space assuming that; ⅰ) the increasing rate of housing cost is ranged from 3 to 5%, ⅱ) GNI per capita is 6~8%, and ⅲ) housing expenditure rate is between 0.0135 and 0.0155. The result of this study shows that the housing demand has the highest chance of being 280M㎡ during the period of 2006~2020. And the probability that the housing demand is 85M~480M㎡ is about 70percents. Based on the result, this study suggests that housing policy makers place top priority on housing supply totaling 280M㎡ and provide more flexibility to their housing supply plan to deal with fluctuating housing demand under the short-term economic situations.
비파괴 신기술을 이용한 석유화학설비 경년손상의 새로운 평가변수 고찰
장재일(Jae-il Jang),최열(Yeol Choi),손동일(Dongil Son),이윤희(Yun-Hee Lee),권동일(Dongil Kwon),김정태(Jeoung Tae Kim) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.8
Newly developed continuous indentation technique has made nondestructive assessment of tensile properties possible. The present study was undertaken to determine new parameters for indicating time-dependent material degradation of petro-chemical plant. Continuous indentation tests were performed at Cr-Ni steel and Cr-Mo steel which are widely used as facilities of petro-chemical plant. From the results, it was found that yield strength and tensile strength cannot be used as general degradation parameters because the change tendencies of the strengths with aging time are variable. On the other hand, work hardening exponent and yield ratio showed consistent tendency with increasing aging time. Therefore, main attention of this work was paid on them as new degradation parameters, and the in-field applicability of the parameters was evaluated and discussed.
장재일 ( Jae Il Jang ) 한국부동산분석학회 2012 不動産學硏究 Vol.18 No.1
The scope of the gratuitous public land conveyance in Urban and Living Environment Improvement Act is not clear, so there are many administrative litigation. And it is pointed out that the gratuitous conveyance system is unfair. Therefore, this study suggest that public sector use the gratuitous conveyance system as public financial support for redevelopment area and the scale of the support be determined by feasibility analysis. In other words, public land in redevelopment area should be gratuitously conveyed to a certain feasibility level, and remaining public land should be used as another means of supporting redevelopment project. To do that, the feasibility of redevelopment areas should be objectively measured and compared. So it is required to standardize construction costs and to equate arbitrary determination factors(Landowner`s Housing Price Rate, Other Factors of Value Determination Factors in Property Appraisal) respectively. Also in order to use the gratuitous conveyance system as public financial support, 1) we should change the law and use the public land in redevelopment area as means of comprehensive public support, and 2) we should appraise official land price more strictly from the time of determining a Renewal District.
LNG 저장탱크 내조용 9% Ni강의 SAW 용접열영향부내 파괴인성 변화 평가
장재일,이정석,이백우,주장복,권동일,김우식,Jang, Jae-Il,Lee, Jeong-Seok,Lee, Baek-U,Ju, Jang-Bok,Gwon, Dong-Il,Kim, U-Sik 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.3
As one step for the safety performance of LNG storage tank, the change in fracture toughness within the X-grooved weld heat-affected zone (HAZ) of newly developed 9% Ni steel, which was submerged arc (SA)-welded, was investigated. Both crack initiation fracture toughness and crack arrest fracture toughness were evaluated by the crack tip opening displacement (CTOD) tests and compact crack arrest (CCA) tests. As the evaluated region approached the fusion line, each test result shorted different tendency, that is, crack initiation toughness decreased while crack arrest toughness increased. The results were discussed through the observation of the microstructural change.
단독주택 재건축사업의 수복형 정비방식 도입에 관한 연구
장재일(Jang Jae-Il),안건혁(Ahn Kun-Hyuck) 대한건축학회 2009 대한건축학회논문집 Vol.25 No.8
The Purpose of this paper is to suggest the standard of rehabilitation for blighted residential area. Urban renewal project can be practiced by various renewal type such as redevelopment, rehabilitation, and conservation. Though the renewal type which is suitable for the characters of each blighted residential area should be choiced, only redevelopment type generally have been used. This study assume that it is possible to decide appropriate renewal type by estimating the necessity of rearranging lot-shape and the possibility of self-developing. As a way of estimating, this paper suggest that we calculate potential building size and produce parcel based feasibility analysis. If potential building size of a lot is bigger than economically feasible size, the lot is regarded as a self-developable lot. By doing so, we can choose a proper renewal type, redevelopment or rehabilitation.
단독주택지 재정비를 위한 민간사업수단의 통합 필요성에 관한 연구
장재일(Jang Jae-Il),안건혁(Ahn Kun-Hyuck) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.12
The goal of this study is to analysis present development methods for blighted detached dwelling area and to examine whether they are reasonable. This study focus on three private-initiated development methods for blighted detached dwelling areas, such as Revelopment project, Reconstruction Project, Housing Construction Project. Though these development methods have different purposes, it is practically difficult to distinguish one from another. Therefore residents are cofused in selecting a development method. Also, because there are the differences of each method in the profitability and the qualification for development union member, many projects has been delayed and the unfair problem has been brought up. After all, the difference of development methods brings more losses than gains. To solve this problems, this paper propose an alternative which integrate these three private-initiated development methods for the blighted dwelling areas. The proposal for integrating is to grade blighted detached dwelling areas by physical and social standards and to offer incentives by the grades.
연속압입 시험기법을 이용한 석유화학설비 경년손상의 새로운 평가변수 고찰
장재일,최열,손동일,이윤희,권동일,김정태,Jang, Jae-Il,Choi, Yeol,Son, Dongil,Lee, Yun-Hee,Kwon, Dongil,Kim, Jeoung-Tae 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.5
Newly developed continuous indentation technique has made nondestructive assessment of tensile properties possible. The present study was undertaken to determine new parameters for indicating time-dependent material degradation of petro-chemical plant. Continuous indentation tests were performed for Cr-Ni steel and Cr-Mo steel which are widely used as facilities of petro-chemical plant. From the results, it was found that yield strength and tensile strength cannot be used as general degradation parameters because the changes in the strengths with aging time didn't show any tendency. On the other hand, work hardening exponent and yield ratio showed consistent tendency with increasing aging time. Therefore, nam attention of this work was paid on them as new degradation parameters, and the in-field applicability of the parameters was evaluated and discussed.