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항공관제 전문성 수준에 따른 시각정보 판독과 미래정보 예측 차이
권혁진,Kwon, Hyuk-Jin 한국항공운항학회 2015 한국항공운항학회지 Vol.23 No.3
Many studies have shown that having perception of spatial information is important for air traffic control officer (ATCO) since it helps them understand the current situation and predict the situation it leads to. However, little or no research has been done to investigate if there is any difference at the levels of expertise in perceiving spatial information and predicting a prospective situation. This study investigates the difference between expert and novice ATCO groups in how accurately each group of ATCO perceive spatial information such as position, altitude, speed, and flying direction, and predicting such information they will encounter shortly. In completing a task to watch the movement of airplanes displayed on the computer monitor as a blip, the participants were asked to predict the position, speed, and the altitude of the aircraft in a minute by marking on the sector map. The results show that the expert group performed better in accuracy and had tendency to overestimate on position and altitude; however, no significant difference was found between the two groups in terms of reading a flying direction. Therefore reading a flying direction may not be a reliable indicator to judge expertise of ATCO. But the expert group shows better predicting performance by perceiving spatial information such as airplane's position and altitude with feeling on time. The study suggests that it is important to enhance perceptive skills in ATCO training in improving their expertise in predicting accuracy traffic situation, preventing from air collision, and improving productivity for more efficient air traffic flow. A further study on the relationship between the perception of spatial information and the sense of time in predicting future information and effectiveness as an independent factor would contribute to providing more insights into expertise of ATCOs.
권혁진,조현근,김명환,정진호,송지선,고근준 대한소화기내시경학회 2009 Clinical Endoscopy Vol.39 No.1
Duodenal gastrointestinal stromal tumors (GISTs) are relatively rare tumors that commonly present with gastrointestinal bleeding. Evaluation with endoscopic ultrasonography (EUS) is a useful technique for the differential diagnosis of GISTs from other submucosal tumors. A 58-year-old man presented with melena and anemia. An esophago-gastroduodenoscopy showed the presence of a submucosal tumor in the second portion of the duodenum with central ulceration and a flat spot. EUS showed the presence of a suspicious malignant GIST that originated from the proper muscle layer, which was successfully resected. We report a case of a duodenal GIST with a bleeding ulcer. Positive reactivity for CD117 and S-100 was demonstrated by immunohistochemical staining. 특별한 자각증상 없이 지내던 환자가 위장관 출혈을 주소로 내원하여 시행한 상부위장관 내시경 검사에서 십이지장 제 2부에서 출혈성 궤양을 동반한 점막하 종양이 발견되었다. 내시경 초음파 검사를 시행하였고 고유근층에서 기원한 악성 종양이 의심되는 GIST 소견을 보여 쐐기 절제술로 제거하였다. GIST는 수술 이전에 양성과 악성 종양을 감별하기 어려운 종양으로 EUS를 시행한다면 수술 전 감별 진단에 도움이 되며, 크기가 3 cm 이하의 양성 종양이 의심되는 경우 24개월 추적 관찰 동안 의미 있는 변화를 보이지 않은 보고가 있어 EUS를 통하여 추적 관찰이 가능하겠다. 따라서 GIST 등의 위장관 점막하 종양은 EUS를 시행하여 치료 방침을 결정하는 것이 도움이 된다. 저자들은 국내 문헌에서 수 차례 출혈성 십이지장 GIST가 보고되었으나 본 증례와 같이 수술 전 EUS를 시행한 보고가 없어 문헌 고찰과 함께 보고한다.
공간구문론(Space Syntax)을 이용한 윤민걸가옥의 움직임을 통해 본 공간구조 특성에 관한 연구
권혁진,손태진 대한건축학회지회연합회 2007 대한건축학회지회연합회 학술발표대회논문집 Vol.2007 No.1
This research aims to inherit the character induced from the relationship between living and spatial structure in Korean Traditional Houses. Space Syntax was selected as the analyzing tool because of its objectiveness in representing these type of relations in hard figures. Especially, inner/outer space shows phased differences according to the living activities which can be summarized into the four factors of individual activity, communal life, household affairs, and social activity. In other words, the mechanism of living within traditional houses was found to be in direct connection with spatial structure. This study analyes space sequence space Korean traditional residence, highlighting the perspective of living place that embodies not only visual design itself but also philosophical meaning embedded in. also, It attempts to examine the characteristics of space that variety space(that is "healthy space") for the people. In doing so, this study aims at contributing to a better understanding of the distinctive features of traditional residence by space sequence as well as searching a model to fit with a lifestyle of the Korean people.