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.

비파괴적 연속압입시험 기법을 응용한 구조용 강의 소성 물성 평가

장재일(J. I. Jang),손동일(D. I. Son),최열(Y. Choi),박순찬(S. C. Park),권동일(D. I. Kwon) 한국소성가공학회 2002 한국소성가공학회 학술대회 논문집 Vol.2002 No.5

국공유지 무상양도를 활용한 재개발사업의 공공지원 방안

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.

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.

부동산중개업 매출 및 현황 분석

장재일,오은주 사단법인 인문사회과학기술융합학회 2017 예술인문사회융합멀티미디어논문지 Vol.7 No.5

In this paper, important implications were sought to keep the real estate brokerage market by analyzing the factors affect the total income of real estate business. In order to achieve the study goals, the related literature were reviewed and a survey was conducted with the real estate agents. The data such as currents trends of real estate market and sales amounts of real estate agencies were collected. Through the literature review, real estate related factors of the regions such as the price of the house, population, number of house holders were analyzed, and through the survey, the general trends of real estate market and the total sales amounts of the last year were analyzed. The factors that affect the real estate business were divided into regional and individual ones. According to the multi regression analysis, regional factors did not affect the sales of real estate agencies, and individual factors such as fixed capital, number of employees, realtor’s education level, experiences, and working hours affect the sales amount of the real agencies 본 연구에서는 부동산 중개업의 매출에 영향을 미치는 요인들을 분석하고 실제 중개업을 영위함에 있어 필요한 시사점을 도출하고자 하였다. 연구의 목적을 달성하기 위하여 문헌조사와 설문조사를 통해 부동산중개업의 일반현황 및 매출 현황 등의 자료를 수집하였으며, 관련 문헌의 실증 분석을 통하여 전국의 부동산 산업과 관련된 지역적 요인을 파악하였고 전국의 개업공인중개사를 대상으로한 설문 조사를 통하여 부동산 중개업의 일반현황 및 지난 1년간의 매출 현황을 파악하였고 중개업 매출에 영향을 미치는 요인을 지역적 요인과 개별적 요인으로 나누어서 분석을 진행하였다. 지역요인의 중개업매출에 대한 영향 분석시, 인구수, 공시지가총액과 중개업체수는 다중공선성이 나타나 중개업체수만을 변수로 채택하였으며, 1인당지역내총소득 및 지가상승률 변수는 다중공선성이 나타나지 않아 분석에 포함시켰다. 이에 대한 회귀분석 결과, 모든 변수들이 통계적으로 유의하지 않는 것으로 나타났다. 다중회귀분석 결과, 지역적 요인들은 중개업 매출에 영향을 미친다고 볼 수 없었으며, 개별적 요인 중에서는 중개사무소의 고정자본, 직원수와 함께 중개사의 학력, 경력, 근무시간이 매출에 영향을 미치는 것으로 파악되었다.

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.

획지계획모형을 적용한 다세대주택용 획지 배치에 관한 연구

장재일(Jang Jae-Il),안건혁(Ahn Kun-Huck) 한국도시설계학회 2008 도시설계 : 한국도시설계학회지 Vol.9 No.3

단위생활권 설정과 생활기반시설 계획을 통한 일반노후주거지 관리방안 연구

장재일(Jang, Jae-Il),배웅규(Bae, Woong-Kyoo) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.7

Recently as problems caused by the scrap and build typed redevelopment are increased, so residential regeneration for the incremental improvement upgrading method are strongly needed. To pursue rehabilitation process, not redevelopment process, we should solve these problems in deteriorated residential area: infrastructure shortage, low-level residential convenience, etc. This study regard appropriate infrastructure as a major factor of sustainable neighborhood regeneration. And this study is aimed at suggesting a guideline of infrastructure plan in detached housing area. This study focuses mainly on the deteriorated residential areas with good infrastructures which are redeveloped in the near future. As a result, this study defines the terms of "Neighborhood Unit" and "Neighborhood leveled infrastructure". The former is the smallest neighborhood whose center is a kindergarten or children"s park. It"s size is about 100,000㎡. The latter is the infrastructure to support the unit neighborhood. Also this study suggests planning standard and establishment method for living infrastructures in a unit neighborhood. These guidelines should be applied to local situation flexibly.

해석직교함수에 관한 고찰

장재일 東亞大學校 1964 東亞論叢 Vol.2 No.2

The theory of analytic functions of a complex variable occupies a central place in analysis. In this thesis some main features and analyticity to the orthogonal functions of a complex variable have been treated in the following order of chapters: (1) Difinition. (2) Complete orthonomal functional sequence. (3) Maximum problems. (4) Expantion of the function. (5) Minimum problems. (6) Additional remarks.

단엽해석함수에 관한 고찰

장재일 東亞大學校 1967 東亞論叢 Vol.4 No.-

It is easy to obtain an upper bound for the Schwarzian differential parameter [ω,z] ny a simple transformation of the classical inequality l a₁l≤1 valid for functions ω=f(z)= z??+a₃ +a₁z+...schlicht in the unitcircle. Indeed applying this inequality to the coefficient of z in the expantion of some schlicht function g(z), we obtain l{ω,z}l≤6(1-lzl²)??. In this thesis we shall show that by replacing the number 6 in inequality by 2 this necessary condition for the schlichtness of f(z) in lzl<1 becomes sufficient.