만성 호중구성 백혈병 1 예

최재진,박정대,김유홍,황기석,허형호,최지용 대한내과학회 1990 대한내과학회지 Vol.39 No.5

Chronic neutrophilic leukemia is a rare myeloproliferative disorder characterized by a sustained high WBC, which is entirely due to the presence of mature neutrophil, hepatosplenomegaly, high neutrophil alkaline phosphatase score, absence of Philadelphia choromosome, and absence of a ceuse for leukemoid blood picture. A 66-year-old woman was diagnosed as having chronic neutrophilic leukemia. Peripheral blood showed leukocytosis with about 90 percent mature neutrophil and rare immature granulocyte. The neutrophil alkaline phosphatase score was high. A bone marrow study showed hypercellular marrow with neutrophilic hyper plasia. Cytogenetic study was normal, with no evidence of Philadelphia chromosome. The underlying disease which causes 1eukcmoid reacction was not detected. The patient had a hemorrhagic tendency, and a coagulation study showed prolonged aPTT. A coagulation factor assay showed deficiency of factor VIII, IX. The platelet function was abnormal on in vitro study showing failure to aggregate with epinepnrine, ristocetin, collagen, and ADP. The disease was well controlled with hydroxyurea.

폐목재 칩 결합용 친환경 폴리우레탄 수지의 개발 및 활용 연구

최재진,이관호,조남욱,문승권 한국폐기물자원순환학회 2013 한국폐기물자원순환학회지 Vol.30 No.8

In order to utilize waste wood chip for pavement, a polyurethane resin that is both eco-friendly and suitable for bindingwood chip was developed as the binder, and workability was examined through laboratory experiment for characteristicsof waste wood chip mixture using the polyurethane resin and through test pavement on the field. The new resin was aVOC reduction type free from plasticizer and solvent classified as endocrine-disrupting chemicals and environmentalhazardous substances, and NCO equivalents were set at 8, 9, 10 and 11% by modifying the polyisocyanate-polyol ratio.Laboratory experiment showed that polyurethane resin with NCO equivalent of 9% and 10% had excellent characteristicsas binder for waste wood chip. In the field experiment applying waste wood chip and polyurethane resin in the massratio of 1:0.8, tensile strength of the pavement system was about 30% higher than that using polyurethane resin currentlybeing sold, and permeability coefficient and elasticity thereof were the same as that using the resin currently being sold.Also, examination of compaction methods for waste wood chip pavement system showed that non-heating hand rollerand compactor had the problem of the “waste wood chip - resin mixture” sticking to the roller during the compaction but that heating hand roller had excellent workability and could achieve good planation surface relatively easily.

대종천유역 충적대수층의 수리성 분석 및 수위강하예측에 관한 연구

최재진,성원모,한정상,Choi, Jae-Jin,Sung, Won-Mo,Hahn, Jeong-Sang 대한자원환경지질학회 1993 자원환경지질 Vol.26 No.4

The main goal of this paper is to determine hydraulic properties and to predict drawdown for the efficient and stable development of groundwater in the Daejong-Chun area, North of Kyungsang-Do. Based on geological survey and analysis of well logging data conducted in 1991, it is found that the type of aquifer of this area is considered to be an anisotropic unconfined aquifer with saturated thickness of 19.8 m. In order to characterize this aquifer pumping test was conducted, and the resulting drawdown data were utilized for the analysis by applying both type curve matching technique and semi-log straight line method. As a result, the average specific yield of this aquifer is estimated as 32.3%, and the average ratio of $K_H$ to $K_V$ is only 2.7, which means that gravitational effect is not significant factor for this type of aquifer. For the validation of the estimated hydraulic properties, the analytical model which was developed with Newton-Raphson iteration procedure in this study, was employed to generate the drawdown. And, the resulting drawdown was compared against actual drawdown data and it shows the excellent matches. The actual drawdown data for 9 hours of pumping were used for history matching purposes and relatively satisfactory matches were achieved in this match. Then, the model was run by using the tuned parameters that are obtained during history matching stage, and the drawdown was predicted for the next 30 years of pumping with $3,000m^3/day$ of constant pumping rate. Its result indicates that the drawdown was stabilized as 1.41 m from 20 days with $3,000m^3/day$ of constant pumping rate, which is the required amount of water to be safely supplied to this area.

사실상표준의 국가표준으로의 활용 방안에 관한 연구

최재진,정순석,김광수 대한안전경영과학회 2009 대한안전경영과학회 학술대회논문집 Vol.2009 No.11

De facto standards can be divided into the U.S. group standards' and 'forum and the consortium standard. mainly applies to high-tech industry forums, and a consortium standard of the industry given the nature of the standard are frequently revised, the country Due to the introduction of standard time. Economic loss to consider when in reality, the introduction of national standards of the United States is limited to the desirable standard, and the fact the actual award of standards, national standards, or if you want to introduce standard, each of depending on the type of attitude and strategy for standards by category, based on the characteristics of each body strategy and are needed. Through this study on utilization of de facto standards for national standards, it is researched that major de facto standards bodies status and domestic industrial fields which need utilization of de facto standards for national standards. Through overseas Case, effective usage of de facto standards will be obtained.

2-Arch 터널의 시공성 향상을 위한 중앙터널 단면개선 사례

최재진,박연준,박재현 한국암반공학회 2013 한국암반공학회 학술대회 및 세미나 자료집 Vol.2013 No.10

터널 보링 머신 공법 구경별 지질조건에 따른 월굴진장 분석

최재진,박홍태 한국재난정보학회 2014 한국재난정보학회 논문집 Vol.10 No.1

본 연구는 독일의 WIRTH사에서 개발한 ø2.6m, ø3.0m. ø3.5m, ø3.8m TBM 장비로 굴진한 TBM 공법 적용 터널 현장의 작업 전 과정을 수록한 굴진보고서를 근거로 작업 항목별로 차지하는 소요시간을 통계화하여 월굴진장을 분석하였다. 또한, 분석된 9개 현장의 운영교대시간의 손실률을 비교해서 가장 낮은 현장을 기준으로 TBM 상승 예상 월굴진장을 분석하였다. 이와 같이 분석된 결과는 향후 유사한 지질 조건의 현장에서 TBM 공법을 적용하여 운영할 경우 기본계획수립단계에서 개적인 공사기간과 공사비의 추정 등의 공사를 계획하고 관리하는데 유용한 도구로 활용할 수 있을 것이다.

공정관리 과학화를 위한 지하철공사 NAS운영체계 데이터베이스 모델링 구축

최재진,조병후,박홍태 한국재난정보학회 2017 한국재난정보학회 논문집 Vol.13 No.3

This study proposed subway construction information classification system based on civil engineering information classification system proposed by Korea Institute of Construction Technology. Also, Based on this criterion, This study established data modeling for NAS operating system Composed of construction information classification system - network - operation and presented an relational database integrated model. The data modeling method proposed in this study can be applied to other civil engineering facilities, so it can be operated as scientific NAS. 본 연구는 한국건설기술연구원(KICT)에서 제시한 토목공사용 정보분류체계(Information Classification System)를 기반으로 지하철공사의 정보분류체계를 제시하였다. 그리고 이 기준을 근거로 NAS(Network Analysis System) 운영체계인 공사정보분류체계 - 공정도표 - 작업별 투입 자원을 연동하는 데이터 모델링을 구축하여 통합 모형을 제시하였다. 따라서 본 연구에서 제시한 데이터 모델링의 통합모형은 다른 토목시설물공사에서도 동일한 절차와 방법으로 적용할 수 있어, NAS를 기반으로 한 공정관리 과학화를 유도할 수 있을 것으로 확신한다.

수처리한 목편을 사용한 경량모르타르의 응결 및 강도특성

최재진,문승권,Choi, Jae-Jin,Moon, Seung-Kwon 한국건설순환자원학회 2012 한국건설순환자원학회지 Vol.7 No.3

목재와 시멘트를 혼합하였을 때 목재의 어느 성분은 시멘트의 수화를 방해하는 것으로 알려져 있다. 본 연구에서는 온수에 의한 목편의 전처리 효과를 검토하기 위하여 2.4 mm 체를 통과시킨 소나무 목편을 온도가 각기 다른 수중에 일정시간 침지시킨 것을 잔골재의 일부로서 대체 사용한 모르타르의 응결 및 압축강도실험을 실시하였다. 이때 모르타르의 배합은 물-시멘트비 50%로 하고 목편의 잔골재에 대한 대체 사용량은 잔골재 질량의 0, 2, 4, 6, 8, 10%의 6수준으로 하였다. 그 결과 목편을 잔골재의 일부로서 대체 사용한 모르타르의 경우, 목편의 사용량이 많을수록 응결이 지연되었으며, 목편의 수처리는 모르타르의 응결지연문제를 개선시키는 효과가 있었다. 특히 수온 $100^{\circ}C$의 물에서 30분간 수처리한 목편을 2~6%의 범위에서 사용한 모르타르의 종결시간은 목편을 사용하지 않은 모르타르의 종결시간과 거의 비슷한 수준을 나타냈다. 또한 수처리한 목편을 사용한 모르타르의 강도는 수처리하지 않은 목편을 사용한 모르타르의 강도와 비교하였을 때, 재령 3일 강도는 거의 같았으나, 7일 및 28일의 강도는 보다 크게 되는 경향을 나타냈다. It is known that some components of wood obstruct the hydration of cement when wood is mixed with cement. In order to examine the effect of pretreatment of wood chips in hot water, this study conducted the experiments for the setting and compressive strength of mortar by sieving pine wood chips with a 2.4mm sieve, dipping them in waters of different temperatures, and then using them as a part of the fine aggregate. For the experiments, water-cement ratio of the mortar was 0.50 and the amount of the fine aggregate substituted by wood chips was set at 0%, 2%, 4%, 6%, 8%, and 10% of the mass of the fine aggregate. As a result of the test, it was found out that when wood chips were used to substitute fine aggregate for the production of mortar, more usage of wood chips postponed setting more, and the treatment of wood chips with water improved the problem of the delay in setting time. Especially, the final setting time of the mortar which used 2~6% of wood chips treated in $100^{\circ}C$ water for 30 minutes was almost the same as the final setting time of the mortar which used no wood chips. Also, the compressive strength of the mortar which used the wood chips treated with water was compared to that of the mortar which used the wood chips not treated with water. The result showed that the strength improved for age of 7 days and 28 days, while there was little change in strength for age of 3 days.

Q & A

최재진 한국콘크리트학회 2003 콘크리트학회지 Vol.15 No.6

표준 연결망을 활용한 표준의 평가방법에 관한 연구

최재진,정순석,김광수 한국품질경영학회 2019 품질경영학회지 Vol.47 No.2

Purpose: The purpose of this study was to propose useful standards evaluation method using standards networks by analyzing the relationship between normative references citation information list. Methods: The collected data through the survey were analyzed using social network analysis. The measurement tools used for this study were divided into three dimensions such as certificate standard, normative reference and degree centrality. Results: The results of this study are as follows; regarding the influence of standard information, It is meaningful that the research using normative reference item among the bibliography information that the standard itself possesses. The analysis of social network analysis data of population standard, normative reference and the correlation analysis with sales, a variable representing actual utilization performance, suggested the importance of the standard and how to evaluate it. Conclusion: In prioritizing standard maintenance, more efficient management will be possible if centrality figures of standard network information are analyzed and used for standard maintenance.