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독도의 벼과식물로부터 분리된 Enterobacter spp.에 의한 고추의 흰별무늬병에 대한 전신유도저항성
손진수 ( Jin-soo Son ),마릴린수마요 ( Marilyn Sumayo ),강현욱 ( Hyun Uk Kang ),김병수 ( Byung Soo Kim ),권덕기 ( Duck Kee Kwon ),김사열 ( Sa Youl Ghim ) 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 2012 한국미생물·생명공학회지 Vol.40 No.2
This study`s aim is to isolate and characterize plant growth promoting Enterobacter species for the biological control of gray leaf spot in pepper. Screening was carried out from the rhizosphere of Agropyron tsukushiensi var. transiens (Hack.) Ohwi in Dok-do. Rhizobacterial isolates were partially identified by 16S rDNA sequencing and Enterobacter species were tested for plant growth promoting capabilities and the induction of systemic resistance in pepper against gray leaf spot caused by Stemphylium solani. Isolates were tested for production of indole-acetic acid and siderophore, and for phosphate solubilization. The application of isolates was effective in controlling gray leaf spot in pepper with E. asburiae (KNUC5007) and E. cancerogenes (KNUC5008 and KNUC5010) having the highest efficacy in reducing gray leaf spot severity. This is the first report of the biological control of gray leaf spot in pepper using rhizobacteria and it is hoped that this study will increase the utilization of Enterobacter species as plant growth promoters and biocontrol agents.
경화 지연제 혼입 콘크리트의 부착전단강도 및 부식내구성 평가
손진수 ( Jin-su Son ),이진영 ( Jin-young Lee ) 한국농공학회 2023 한국농공학회 학술대회초록집 Vol.2023 No.0
In this study, the bond shear strength and corrosion resistance of concrete with setting retarder were evaluated. To investigate the bond shear strength and corrosion resistance of concrete with setting retarder, slant shear tests, bi-surface tests, and accelerated corrosion tests were carried out. Variables considered included the proportion of setting retarder (0, 1%), surface treatments of concrete (as-cast, chipping, brushing), curing hours (8, 16, 24h), and concrete cover depths (20, 30, 45mm). As a result, the bond shear strength of concrete with retarder showed higher value compared to normal concrete. Moreover, an increase in curing hours resulted in a higher value of bond shear strength. Furthermore, the addition of a retarder in concrete demonstrated an increase in corrosion resistance. Based on the test results, it is deemed that the addition of a setting retarder can be a suitable solution to address the bond shear strength and durability issues that may arise at the interface of delayed concrete placement.
태양광 패널이 적용된 농업용 저수지의 안정성 및 경제성 평가
손진수(Jin-Su Son),이진영(Jin-Young Lee) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.5
대한민국의 농업용 저수지는 대부분 축조된 지 50년 이상 되었다. 농업용 저수지는 예상치 못한 자연재해로 인해 붕괴되는 것을 막기위해 유지보수와 보강이 필요하다. 본 연구에서는 태양광 패널이 적용된 농업용 저수지 사면의 안정성과 경제성 평가를 수행하였다. 태양광 패널이 설치된 사면의 안정성은 Slope/w 프로그램을 사용하여 평가되었고 보강 방법과 태양광발전 시스템의 부하를 고려하였다. 또한 RETScreen 프로그램을 사용하여 태양광 발전 시스템의 경제성 분석을 수행하였다. 경제성 분석에는 태양광 모듈의 단위 비용, 태양광 패널의 수명, 그리고 대상 저수지의 기후 환경이 고려되었다. 결과적으로, 태양광 시스템과 보강 방법의 적용으로 저수지 사면의 안정성이 향상되었다. 게다가 전기 생산 및 온실 가스 감축과 같은 경제적 이점을 기대할 수 있음을 이론적으로 확인하였다. In Korea, the majority of agricultural reservoirs have been in use for over 50 years. Hence, there is an urgent need for maintenance and reinforcement to safeguard against potential collapses caused by unforeseen natural disasters. This study assessed the stability and economic viability of applying solar panels to these agricultural reservoir embankments. The Slope/w program was used to analyze the stability of embankments fitted with solar panels, considering reinforcement techniques and the load from the photovoltaic (PV) system. The economic feasibility of the PV system was determined using the RETScreen program, factoring in the unit cost of solar modules, lifespan of solar panels, and specific climatic conditions of the target reservoir. The findings indicate that the PV system and reinforcement techniques enhanced the stability of the reservoir embankments. Furthermore, economic benefits, such as production of electricity and reduction of greenhouse gas, can be expected.
경화 지연제 혼입 콘크리트의 부착전단강도 및 부식내구성 평가
손진수(Jin-Su Son),이진영(Jin-Young Lee) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.4
본 연구에서는 경화지연제를 혼입한 콘크리트의 부착전단강도 및 부식내구성을 평가하였다. 경화지연제 혼입 콘크리트의 성능을 평가하기 위해 경사전단시험, 직접전단시험, 가속화부식시험을 수행하였다. 시험의 변수로는 경화지연제 혼입율(0, 1%), 콘크리트 타설면 처리방법(무처리, 치핑, 브러싱), 상층부 콘크리트 지연 타설 시간(8, 16, 24 h)이 고려되었으며 가속화 부식 시험의 경우 콘크리트 피복 두께 변수(20, 30, 45 mm)가 추가로 고려되었다. 시험의 결과로 경화지연제를 혼입한 시험체의 부착전단강도가 일반 콘크리트 시험체에 비해 더 높게 나타났으며 지연 타설 시간이 증가함에 따라 부착전단강도가 감소하는경향이 나타났다. 또한 경화지연제의 혼입을 통해 철근콘크리트의 부식내구성 향상을 확인하였으며 이러한 결과를 통해 경화지연제의 혼입이 지연 타설로인해 발생할 수 있는 타설 경계면의 부착강도와 내구성 저하 문제를 해결할 수 있는 적절한방안이 될 수 있다고 판단된다. In this study, the bond shear strength and corrosion resistance of concrete with setting retarders were evaluated. For this, slant shear, bi-surface, and accelerated corrosion tests were conducted. The variables considered included the proportion of the setting retarder (0 and 1%), surface treatments of concrete (as-cast, chipping, and brushing), curing hours (8, 16, and 24 h), and concrete cover depths (20, 30, and 45 mm). Consequently, the bond shear strength of concrete with the retarder showed a higher value than that of normal concrete. Moreover, an increase in curing hours resulted in a higher value of the bond shear strength. Furthermore, the addition of a retarder in concrete increased corrosion resistance. Based on the test results, the addition of a setting retarder is believed to be a suitable solution to address the bond shear strength and durability issues that may arise at the interface of delayed concrete placement.
아파트의 분양권 가격변동에 관한 연구 - 시기별 가격변화를 중심으로 -
손진수(Son Jin Soo),서후석(Suh Hoo Suk) 한국부동산학회 2004 不動産學報 Vol.23 No.-
1. CONTENTS (1) RESEARCH OBJECTIVES The purpose of this study is to review and deduct the issue of government policy for newly built APT market by forecasting the price fluctuation of its purchasing rights. (2) RESEARCH METHOD This study analyzes the trends and characteristics on the price fluctuation of purchasing rights for newly built APT with its time-series data. (3) RESEARCH RESULTS The result on the study is as follows ; 1) The price and its variation rate on the purchasing of rights for APT has positive increased, although there are some variations according to the sale time. 2) There are big differences in the price on the purchasing of rights for APT from sale to commencement, specially between initial APT sale time and commencement time. 3) APT price before-commencement is more volatile than after-commencement. 4) The transaction activity of purchasing rights is more active at the time of before-commencement. 2. RESULTS The policy issue of the study is as follows ; 1) It needs detail analysis on market and alternative in policy approach because transaction market for newly built APT is relatively unstable and volatile. 2) The policy on transaction of purchasing rights for newly built APT has to be considered with other major economic indicators. 3. KEY WORDS purchasing rights for newly built APT, price before and after-commencement, The transaction activity of purchasing rights
손진수(Son Jin Soo),서후석(Suh Hoo Suk) 한국부동산학회 2006 不動産學報 Vol.27 No.-
1. CONTENTS (1) RESEARCH OBJECTIVES The purpose of this study were to review, deduct and compare the financing characteristics of private real estate development. (2) RESEARCH METHOD Conceptual models to financing structure of private real estate development were developed through related literature reviews. Practical models and characteristics were suggested through case studies. (3) RESEARCH RESULTS The result of the study is as follows ; 1) The funding tools of land acquisition cost are constructor"s financing, real estate development trust financing and financial institution"s project financing. Recently the project financing tool has seen increased utilization. 2) However, all three tools are heavily dependent on the credit of construction company. 3) Three tools related in a competing and complementary ways and new variations are appearing in the market. 4) The development in real estate financing has progressed from solely constructor financing -> constructor + developer financing -> constructor + developer + financial institution financing. Further evolution is expected in the form of developer + financial institution financing. 2. RESULTS And the policy issue of the study is as follows : 1) The real estate development finance tools are expected to be more diversified and would raise the need for relevant regulatory developments that would meet the realistic needs of real estate development industry. 2) The real estate development industry, including constructors, developers, real estate investment trusts and financial institutions, need to enhance risk analysis and management capability of real estate development projects.