Stent thrombosis (ST) is the sudden occlusion of a stented coronary artery because of thrombus formation. ST is a rare, but can result in life-threatening complications. Early stent thrombosis occurs frequently after primary percutaneous coronary intervention (PCI) for acute ST-segment elevation myocardial infarction (STEMI). Here, we report a case of a 59-year-old man with acute stent thrombosis immediately after primary PCI with drug-eluting stent for acute STEMI.

In this study, corrosion potentials were evaluated according to the composition ratio of Zn-Al alloy. Alloys were fabricated according to the composition ratio of Zn-Al. The corrosion potential was measured according to ASTM B 627-84. As a result of the study, the measured value of corrosion potential tended to increase with increasing composition ratio of Al.

Phase change material (PCM) has been developed and applied in various fields as construction material. If the application of PCM as the semi-rigid pavement cement grout becomes available, it would be possible to control the occurrence of a micro crack due to the generation of hydration heat in the ultra rapid harding cement, and if the occurrence of a micro crack is reduced, it would be possible to improve the cohesion performance between asphalt matrix and grout as well as to compact the matrix of the pavement material, improving the durability. Therefore, the applicability review of PCM for the purpose of improving the semi-rigid pavement materials through the shrink reduction of ultra rapid harding cement used as the semi-rigid pavement cement grout was carried out in this

In this study, review anti-corrosion performance of the metal spraying sealing agents in according to molecular weight. It was evaluated according to KS D 9502 CASS test for determine anti-corrosion performance of sealing agents. Results showed, the molecular weight range of 20,000∼30,000 molecular sealing treatment manufactured through the control material exhibited the best performance.

A study to apply phase change material(PCM) to rapid hardening cement paste forming semi-rigid pavement was carried out. The characteristics fresh and hardened paste were evaluated through the experiment for a total of 6 mixtures according to the cement type and the substitution of phase change material for acrylate. The fluidity by substituting phase change material for acrylate satisfied the target flow time of 10 to 13 seconds. In case of setting time, it was possible to secure the performance of rapid hardening cement by substituting phase change material, and if the substitution ratio over 60%, the initial set occurred 1 to 2 minutes faster than other mixtures. In case of compressive strength and bond strength, it showed similar strength characteristics with the plain mixture, and it satisfied both the target compressive and bonding strength of 36MPa and 2MPa. The mixture substituting phase change material showed higher resistance to chloride ion penetration than the mixture only using acrylate and the OPC level was insufficient. From the results of physical and mechanical performances of semi-rigid pavement cement paste, the phase change material substitution rate of 20% was effective in the range of this study.

This study is the adhesion strength of the sprayed metal in accordance with a proportion ratio of the Zn-Al. Results showed the most excellent adhesion strength for metal spraying Al100 For the metal spraying Zn100, ZnAl85, ZnAl95 exhibited a similar level of adhesion strength results.

The appearance and physicochemical characteristics of a native jujube (called Yak jujube) and Bokjo jujube were compared in this study. Our results revealed that the native jujube had smaller size, lower hardness, and higher contents of sugar, crude protein, crude fat, crude ash, dietary fiber, and calcium contents, when compared to that of Bokjo jujube. Therefore, native jujube is softer and sweeter, with higher general nutrient content, despite being smaller than that of Bokjo jujube.

This study is carbonation resistance of the natural durability enhancement materials that can reduce cracking of the concrete. The durability enhancement materials of natural were substituted 10%, 20%, 30% of cement, the results were confirmed excellent carbonation resistance as the more increasing the natural durability enhancement.

본 연구에서는 수평변위와 횡력의 저감을 위해서 빌딩외부의 빌딩간 변형차이와 단면2차 모멘트의 최대화를 이용하여 다수의 빌딩으로 구성된 빌딩시스템의 빌딩간 협업제어 방식의 횡력분배 및 변위감소를 제안하였다. 제안된 복합빌딩 시스템의 안전설계를 위한 방안으로 케이블 파단시의 연속붕괴방지를 위한 연결부 정착판의 추가배치와 대공간구조 자체의 질량과 강성 및 공간을 활용한 동조질량감쇠장치의 설계에 대하여 제안하였다. 도심지 인구집중과 지가상승의 필연적 결과에 대한 해결방안으로 제안된 초고밀도 복합빌딩 시스템의 설계 최 적화를 위하여, 3차원 빌딩구조시스템의 2축 대칭조건과 경계조건을 이용하여 2차원 모델을 구성하고 1차부정정구조를 이루는 2차원 모델 의 중요설계변수를 검토하였다. 제안된 복합빌딩구조 시스템은 인구밀도와 지가가 상승하는 도심내 최대밀도구역에서 토지이용의 효율성을 극대화시키고, 새로운 빌딩 또는 기존빌딩구조의 안전성을 증대할 것으로 기대한다.

This study is the study of the strength characteristics of the study of the natural durability enhancement materials that can reduce cracking of the concrete. The durability enhancement materials of natural were substituted 10%, 20%, 30% of cement, the results were confirmed excellent strength as the more increasing the natural durability enhancement.

This study is the study of the chlorine ion penetration resistance of the study of the natural durability enhancement materials that can reduce cracking of the concrete. The durability enhancement materials of natural were substituted 10%, 20%, 30% of cement, the results were confirmed excellent chlorine ion penetration resistance as the more increasing the natural durability enhancement.

We investigated the spatiotemporal variations of dissolved inorganic nutrients along a saline gradient to estimate nutrient fluxes in the Seomjin River estuary during dry (March 2005, March 2006, March 2007, and March 2008) and rainy seasons (August 2005, July 2006, July 2007, and July 2008). Dissolved inorganic nitrogen concentrations were similar in the endmembers of freshwater for the rainy and dry seasons. In contrast, the concentrations of dissolved inorganic phosphate and silicate in the rainy season were approximately 2-3 times higher than those in the dry season. River discharge was approximately 10 times higher in the rainy season (212 m3 sec-1) than in the dry season (21 m3 sec-1). The fluxes of dissolved inorganic nitrogen, phosphate, and silicate were 2.91, 0.004, and 2.51 tons day-1 in the dry season and 7.45, 0.421, and 30.5 tons day-1 in the rainy season, respectively. Although the range of nutrient concentrations were similar to previous results from investigations in the Seomjin River estuary, the nutrient fluxes were differed according to river discharge for different survey periods.

Esophagojejunostomy after total gastrectomy shows high mortality and morbidity. Complication after esophagojejunostomy was caused by constant tension on esophagojejunostomy in erect-position, resulting in disturbance of blood flow in the anastomotic site. The purpose is to evaluate efficacy of anchoring sutures. Medical charts of patients diagnosed with gastric cancer who underwent total gastrectomy from 1998 to 2008 were analyzed retrospectively. Anchoring suture between jejunum and diaphragm after esphagojejunostomy was performed in all patients. A total of 155 patients were enrolled. Esophagojejunostomy leakage 3, revision operation 2, and conservation 1. Esophagojejunostomy stenosis 1, which was improved by balloon. This procedure could protect the esophagojejunostomy site from traction force.

The most commonly used material of construction structures is steel. In this study, Epoxy-based coating materials and Ceramic-based coating materials durability were investigated. Exposed water immersion, chloride immersion, temperature changes, freezing and thawing for severe environments to simulate and environmental conditions are showed degraded in epoxy-based coating materials.

There were many attempts to increase the level of environmental cooperation in Northeast Asia. However, intergovernmental cooperation has not brought a substantial effects so far. This article aims to provide a model for multilateral joint research of environmental technologies. Each field of environmental problem requires a Consortium of joint research team and R & D mechanism. This model emphasizes joint-funding, tax-break for environmental investment and the importance of multilateral contract.

Concrete structures known that relatively safe for the fire, but the fire damage at different depending on the materials used will be affected, depending on the strength of the concrete damage situation appears different. In this study compared to compressive strength properties acooding to different type of concrete strength fire damege through about concrete structure is utilized as a basis for maintenance.

The priority order about a rational repair and reinforcement is generally decided by subjective decision of engineer. An appearance investigation carried out to decide about a rational repair and reinforcement through systematic and objective analysis in tunnel. we could prevent expecting leakage through several improvements in the aspects of design, materials and site implementation.

본 연구의 목적은 정보통신 윤리교육에서 개인화 포털을 활용한 사례기반학습의 효과성 분석을 위한 것이다. 이 연구 문제를 해결하기 위하여 강원도에 소재한 특성화 고등학교 3학년 2개 학급 30명을 실험집단(15명)과 통제집단(15명)으로 선정하였다. 실험에 앞서 두 집단의 동질성을 알아보기 위한 사전 검사를 실시하였다. 실험은 3주 동안 6차시에 걸쳐 진행되었으며, 개인화 포털을 활용한 사례기반학습은 실험집단에만 투입하였다. 정보통신 윤리의식의 향상 정도를 측정하기 위하여 사후검사를 실시하였다. 실험 결과에 대한 통계처리는 SPSS/WIN 19.0 통계프로그램을 이용하여 정보통신 윤리의식 검사의 두 집단 간 평균을 비교하는 독립표본 t-검증을 실시하였다. 본 연구의 결과는 개인화 포털을 활용한 사례기반학습 수업모형을 활용하여 정보통신 윤리교육을 학습자에게 적용한 후, 학습자의 정보통신 윤리의식의 변화를 존중영역과 책임영역으로 나누어 분석한 결과 존중영역이 16% 책임영역이 10% 향상되었다.

In this study we propose an effective method, Coating processing methods, which can improve the quality of recycled aggregate relatively easily without new equipment investment and complex treatment process and verify the improved effect using the devised method, Coating processing methods. To attain the research aim we used adequately diluted silicate solution for coating and carried out several property valuation for twelve types of material with different coating method. Also we formed concrete with coated aggregates which showed the best property. In conclusion the aggregates with the method of repeated impregnation in the silicate and drying showed the most excellent quality while other coating methods also resulted in an improvement of aggregate quality but failed to meet the KS Standard. Lastly with the optimal material we could obtain the approved compressive strength from the concrete allowing it to be utilized for road facility of which standard compressive strength of design is under 24MPa.

본 연구에서는 긍정의 말과 의도가 애기장대의 발아와 생체중에 미치는 영향을 알아보았다. 매번 200개의 애기장대 종자를 4개의 묘판에 각각 50개씩 파종하였고 이를 3차례 반복 실험하였다. 10개의 긍정적인 말과 부정적인 말을 개발하여 사용하였으며, 사람의 음성과 기계음(test-to-speech software, Voice TestTM)을 통해 각각의 말을 애기장대 종자에 들려주었다. 또한 사람의 의도가 종자에 미치는 영향을 알아보기 위해 실험자로 하여금 부정적인 말은 부정적인 의도를 가지고, 긍정적인 말은 긍정적인 의도를 가지고 읽게 하였다. 긍정적인 말과 부정적인 말, 그리고 의도는 발아율에 유의미한 영향을 주지 않았다. 그러나 평균 생체중 비교에서는 의도가 있는 사람의 긍정적 말이 애기장대의 생체중 증가에 유의하게 영향을 주었다. 따라서 애기장대에 긍정적인 의도를 포함하여 긍정의 말을 전달하였을 때 애기장대의 생체중에 크게 구별되는 효과가 있다는 점을 알 수 있다.