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박재식,노영오,안병원,남택근,Park Jae-Shik,Roh Young-Oh,Ahn Byung-Won,Nam Taek-Kun 한국마린엔지니어링학회 2004 한국마린엔지니어링학회지 Vol.28 No.7
In this paper, a trajectory tracking problems using SMC(sliding mode control) is presented. In the conventional method. SMC has been applied to linear systems and the output matrix C has to satisfy a restrictive condition that CB is nonsingular. Under suitable assumptions, decoupling SMC can be adapted to remove the restriction mentioned above. The Proposed control strategy is applied to trajectory tracking control and simulations results are given to demonstrate the effectiveness of the proposed control scheme.
박재식(Jae-Shik Park),소명옥(Myong-Ok So),오세준(Se-June Oh),유희한(Hee-Han Yoo),박진길(Jin-Gil Park),하주식(Joo-Shik Ha) 한국마린엔지니어링학회 2003 한국마린엔지니어링학회 학술대회 논문집 Vol.2003 No.-
Photovoltaic power generation systems are expected to be widely used becase of their cleanness in the environment. But one of their disadvantages is the unexprected fluctuation of photovoltaic power generated by the weather conditions.<br/> This paper proposes to predict the output fluctuation of photovoltaic power by analyzing clouds through the image processing technique. First, the velocity of the cloud in the image is calculated by the comparison between two sequential images of the cloud, and then, the weather conditions are forecasted by examining the color values of the image along the direction of the cloud movement. Experimental results, the weather forecast 60, 90 and 120 seconds ahead and the estimation of the time required for the solar radiation to fluctuate on a large scale, show the possibility of the prediction of the output fluctuation of photovoltaic power generation system.<br/>
기관 구역 시뮬레이터 교육의 효율적 수행 방안에 관한 소고
정병건(Byung-Gun Jung),Peter Niekamp, 박재식(Jae-Shik Park) 한국해양대학교 해사산업연구소 2002 海事産業硏究所論文集 Vol.12 No.-
This paper suggests a method to perform effective education and training for pc-based machinery space simulator. The method includes sequence, procedure, exercise and evaluation. The sequence and procedure present explanation for the machinery and guide trainee to the competent level. The exercise enhances understanding for efficient engine management and enable user to perform research for the machinery. The evaluation shows exercise results and feedbacks instructor how to guide the under-performed trainee.
증례 : 순환기 ; 국한된 ST 분절 상승을 보인 심근경색으로 오인된 급성 심근심막염 1예
김태욱 ( Tae Wook Kim ),정민정 ( Min Jeong Jeong ),임준영 ( Jun Young Im ),정재식 ( Jae Shik Jeong ),박미란 ( Mi Ran Park ),박주철 ( Ju Cheol Park ),정준호 ( Joon Hoon Jeong ) 대한내과학회 2011 대한내과학회지 Vol.80 No.1
본 증례의 환자는 급성 상기도 감염의 증상 이후 발생한 흉부 불편감을 주소로 내원하였고, 국한된 ST 분절의 상승과 심근 효소의 상승으로 급성 심근경색증이 의심되었으나, 심장 초음파 및 관상동맥 조영술을 시행한 이후 급성 심근심막염으로 진단할 수 있었고, 이를 대증적 치료로 완치하였다. 이에 본 저자들은 급성 심근경색증의 소견을 보인 급성 심근심막염 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Although, with regard to diagnosis, history, physical examination, laboratory data, and electrocardiogram (ECG) are helpful, it can be difficult to distinguish between pericarditis, myopericarditis, and myocardial infarction. Typically, the ECG pattern evolves similarly in acute pericarditis and myopericarditis and includes diffuse ST elevation and PR depression, and then diffuse T wave inversion. Nevertheless, atypical ECG features are seen occasionally in both, especially in myopericarditis. They are characterized by localized ST elevation (inferolateral or anterolateral) and T wave inversion before ST segment normalization. This makes it difficult to distinguish acute myopericarditis from acute myocardial infarction. We report the case of a 27-year-old man with acute myopericarditis with localized ST elevation mimicking acute myocardial infarction. (Korean J Med 2011;80:92-96)