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운전 중 동시과제 수행이 택시 운전자의 피부전도도에 미치는 영향
연홍원,윤희정,신희용,김한수,지두환,민병찬,탁계래,정순철 한국산업경영시스템학회 2011 한국산업경영시스템학회 학술대회 Vol.2011 No.춘계
The purpose of this study was to investigate the effects of the secondary tasks such as sending text message (STM) and searching navigation (SN) on skin conductance level (SCL) during driving. The participants included 29 taxi drivers; 14 males aged 56.7 ± 4.3 with 29.7 ± 7.0 years of driving experiences and 15 females aged 55.5 ± 3.5 with 20.1 ± 5.7 years of driving experiences. All subjects were instructed to keep a certain distance (30m) from the car ahead and a constant speed (80km/h or 100km/h). SCL was measured during driving only and driving with secondary tasks. SCL was more increased during the driving with secondary tasks than driving only. By increasing the driving speed, SCL was increased during the driving with secondary taks. Secondary tasks increased an activation of sympathetic nerve system. However, there were no significant differences in the SCL according to gender.
운전 중 동시과제 수행이 택시운전자의 차간거리 및 속도유지 능력과 피부전도도 변화율에 미치는 영향
연홍원(Hong-Won Yeon),윤희정(Hee-Jeong Yoon),김한수(Han-Su Kim),김지혜(Ji-Hye Kim),최미현(Mi-Hyun Choi) 한국산업경영시스템학회 2012 한국산업경영시스템학회지 Vol.35 No.2
The purpose of this study was to investigate the effects of the secondary tasks such as sending text message (STM) and searching navigation (SN) on skin conductance level (SCL) and driving performance of relatively aged and high-experienced drivers. The subjects included 26 taxi drivers; 12 males aged 56.3±4.4 with 28.4±6.4 years of driving experiences and 14 females aged 55.5±3.5 with 19.4±5.0 years of driving experiences. All subjects were instructed to keep a constant following distance (30m) from the car ahead and a given vehicle speed (80km/h or 100km/h) in a driving simulator. The relative change of SCL, vehicle velocity deviations, and average following distances were measured during driving only and driving with secondary tasks. The relative change of SCL, average following distance, and vehicle velocity deviation were more increased during the driving with secondary tasks than driving only. The relative change of SCL, vehicle velocity deviation, and average following distance were more affected by driving with 100km/hr than 80km/hr of a given vehicle speed. Secondary tasks increased a work load of drivers in term of SCL change, and decreased driving performance in terms of the vehicle velocity deviation and average following distance.
운전 중 동시과제 수행이 택시 운전자의 피부전도도에 미치는 영향
연홍원(Hong-Won Yeon),윤희정(Hee-Jeong Yoon),신희용(Hee-Yong Shin),김한수(Han-Soo Kim),지두환(Doo-Hwan Ji),민병찬(Byung-Chan Min),탁계래(Gye-Rae Tack),정순철(Soon-Cheol Chung) 한국산업경영시스템학회 2011 한국산업경영시스템학회 학술대회 Vol.2011 No.-
The purpose of this study was to investigate the effects of the secondary tasks such as sending text message (STM) and searching navigation (SN) on skin conductance level (SCL) during driving. The participants included 29 taxi drivers; 14 males aged 56.7 ± 4.3 with 29.7 ± 7.0 years of driving experiences and 15 females aged 55.5 ± 3.5 with 20.1 ± 5.7 years of driving experiences. All subjects were instructed to keep a certain distance (30m) from the car ahead and a constant speed (80㎞/h or 100㎞/h). SCL was measured during driving only and driving with secondary tasks. SCL was more increased during the driving with secondary tasks than driving only. By increasing the driving speed, SCL was increased during the driving with secondary taks. Secondary tasks increased an activation of sympathetic nerve system. However, there were no significant differences in the SCL according to gender.
강산하,홍원정,김홍민,이상환,오지수,오도연,정소영 대한내과학회 2013 대한내과학회 추계학술대회 Vol.2013 No.1
서론: 유방에서는 피부, 지방, 결합조직과 상피세포 등에서 기인하는 다양한 종양이 발생한다. 결합조직에서 발생하는 유방의 육종은 전체 유방암의 약 1% 정도로 보고되고 있으며, 일차성 유방 골육종은 그 중 12.5%에서 발생하는 매우 드문 암이다. 일차성 유방 골육종은 조기 재발이 흔하고 림프성보다는 혈행성으로 전이가 되는 매우 공격적 성향을 갖는 암으로, 일차성 유방 골육종이 혈행성 전이를 보인 1 예를 경험하였기에 이를 보고하는 바이다. 증례: 67세 여자 환자가 우연히 발견한 좌측 유륜 아래의 무통성 종괴를 주소로 내원하였다. 내원 당시 왼쪽 유방의 유륜 아래 약 2 cm 크기의 무통성 종괴가 촉지 되었으나 피부색 변화나 유두 분비물은 관찰되지 않았다. 유방 촬영술에서 석회화 소견은 보이지 않았고 유방초음파에서 4 cm크기의 침상의 불규칙적인 저에코성 종괴가 관찰되어 중심부 바늘생검을 시행하였고 화생암종 소견을 보여 유방전절제술을 시행하였다. 수술 후 조직검사에서 상피세포는 없이 골형성 조직으로만 이루어진 골육종으로 진단되었다. 양전자방출단층촬영, 골스캔, 복부초음파에서는 전이의 소견이 보이지 않았다. 수술 4개월 후 환자는 간헐적인 가슴통증, 호흡곤란을 호소하여 단순흉부촬영을 시행하였고 양측 폐엽에 다발성 종괴가 관찰되어 혈행성 폐전이로 진단되었으며, 얼굴과 두피에 발생한 1 cm 크기의 붉은색 구진도 조직검사에서 전이로 진단되었다. 일차성 유방 골육종이 혈행성 전이를 보인 1예를 경험하였기에 이를 보고하는 바이다.