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이문환,신형수 대한정형도수치료학회 2005 대한정형도수물리치료학회지 Vol.11 No.2
Lateral epicondylitis is characterized by pain at the lateral aspect of the elbow, commonly associated with resisted wrist or finger extension and gripping activities. Lateral epicondylitis is also known such as lateral epicondylosis, tennis elbow, or tendonitis of the wrist extensor muscles, especially extensor carpi radialis brevis. Lateral epicondylitis is a common musculoskeletal lesion in the clinical states, so physical therapist usually meet a patients who has the lateral epicondylitis. But many of physical therapists are treating patients based on a self know-how, so I want to describe a systematically about lateral epicondylitis and give a objective information on the lateral epicondylitis. And now I want that they will be treat patients with lateral epicondylitis not a self-experience but based on a objective information.
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원재료 조성에 따른 폴리머 시멘트 모르타르 보수재의 물리적 성상변화에 대한 연구
이문환,송태협 대한건축학회 2007 大韓建築學會論文集 : 構造系 Vol.23 No.5
Restorative mortar of which main materials are cement employs and makes diverse combined materials for better performances in site work conditions. Many factors including setting time, stream, work, and conveyance are able to work as components of materials and the amount of rebound and the efficiency of adhesion in construction works as main factors of materials.This study is intended to compare and analyze performances of which mortar combination is suitable to spray in restoration works for concrete. For this, it sets out the combination of cement, powder-type EVA polymer and reinforced fiber and changes the factors of raw materials by two to compare performances. The results of the study show that properties of raw materials of restorative mortar are as follows.Shape of fine aggregate is similar to round type and bending force and rate of change in length are stable, while one of natural aggregates is not regular and provides with lower physical properties. Anhydrite gypsum used to ensure initial strength alters in performances as connected with using superplasticizer. Specifically, polycarbonate-based and melamine-based superplasticizers are substantially unavailable to molding of product due to fast hardening and dehydration. The study has identified that additional CSA is able to control initial strength but is lower in rate of change in length and stability than alumina cement mixtures. The measurement of fiber types shows that the length of mixture of PP fiber changes smoothly, which indicates that PP fiber with lower specific gravity is relative higher depending on mixing rate by weight ratio. Mixing of PP fiber, therefore, does not improve the strength due to pull-out under strong external force like bending force but is excellent in cohesion for longer period like drying shrinkage.
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황마를 보강섬유로 혼입한 압출성형 시멘트 복합체의 물리적 특성 연구
이문환,김세운,서치호 대한건축학회 2007 大韓建築學會論文集 : 構造系 Vol.23 No.9
In order to improve the bending strength and the impact strength of the extrusion molding cement compounds, enhance the energy absorbing capability, using the jutes as the strengthen textile is reviewed with extrusion molding facilities. As the result of conducting the physical test of the extrusion cement compounds, jutes is superior about the attached characteristics in the matrix, elastic modulous, absorbing ratio, density. Also, length change ratio, and decreasing ratio of the extrusion speed show decrease by adding jutes. Therefore, in case of using the jutes as the strengthen textile for extrusion molding cement, it shows the superior or same to the characteristics of the nylon and polyvinyle alcohol.
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플라이애시 혼입방법에 따른 콘크리트 장?단기 특성에 관한 실험적 연구
이문환,문종욱 대한건축학회 2007 大韓建築學會論文集 : 構造系 Vol.23 No.9
Because this experiment uses flyash that is by-product of thermoelectric power plant, and the practical use allows purpose can augment the mixing rate and concrete early compressive strength presents application way of subsequentness various building through method that can define. This research for this is presented new addition method applying flyash addition method 4 that present in RILEM. The concrete improve of the strength in addition method to alternate one part of cup aggregate amount by flyash among 4 addition method thus, appeared by is good manegement to long-term compressive strength, weight decrease, thermal insulation ability improvement, and medicative thing of drying shrinkage improvement and so on.Therefore, this study is expand the flyash mixing rate to 40% as cement weight such new match plan, and diversified research for concrete durability promotion is judged should be continued because controlling America briquet small quantity reduction method for liquidity improvement and mixed soul topic amount furthermore.
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이문환,김수빈 한국환경연구원 2021 한국환경정책평가연구원 기초연구보고서 Vol.2021 No.-
■ 연구의 주요 내용 ○ 전 세계적으로 지구온난화에 따라 가뭄 빈도 및 심도가 심화하고 있는 것으로 전망되며, 가뭄관리가 다원화되어 있는 국내 특성상 가뭄관리 협력체계 강화방안 도출 필요 ○ 국내 가뭄관리 법령 현황, 계획 수립 현황, 가뭄 예·경보 및 대응체계, 가뭄정보 분석시스템에 관한 현황 조사 및 문제점 분석 ○ 국외(미국, 영국, 호주 등) 가뭄관리 사례를 조사 분석하여 우리나라 가뭄관리 문제점에 관한 다양한 측면의 시사점 도출 ○ 이를 토대로 가뭄관리 개선방향 및 협력체계 구축방안 도출 ■ 정책 제안 ○ 대응 중심에서 사전예방 측면으로의 가뭄관리 전략의 패러다임 전환과 그에 맞는 가뭄관리 단계별·기관별 역할 재정립 ○ 기후변화에 따른 미래 가뭄 전망 및 취약성 평가 등을 고려한 극한가뭄 및 메가가뭄 적응 대책 수립 ○ 중장기 국가 가뭄 회복탄력성 및 대응 전략과 추진전략을 포함하는 국가 가뭄관리 기본계획 신설 ○ 국가, 유역 및 지자체 가뭄 관련 정보의 통합관리를 위한 국가 통합가뭄정보시스템 구축 및 운영
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싸이클론 건식공정으로 생산된 재생 잔골재가 콘크리트의 기초특성에 미치는 영향
이문환,이세현 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.2
This study is intended for how to utilize the recycled fine aggregate which is produced by concrete wastes. It analyses the quality of the fine aggregate which is reproduced through a dry production process with cyclone, and comprehends the characteristics of mortar using the recycled fine aggregate to review whether it can be put to practical use for concrete. In: the experiment, recycled fine aggregate is substitute for natural fine aggregate the rate of 0, 25, 50, 75 and 100% each. The results of the study are as follows. 1) The air content is increased irregularly according to the substitutive ratio of recycled fine aggregate. 2) The slump and loss of slump with time since mixing are decreased irregularly according to the substitutive ratio of recycled fine aggregate. 3) The compressive strength of concrete using the wet recycled fine aggregate tends to be reduced with the increase of the mixing ratio of recycled fine aggregate, but the compressive strength of 25% substitution ratio is increased. Based on the above results, it is concluded that the recycled fine aggregate through the wet production process can be used as fine aggregate on condition that the substitution ration is under 25%.
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