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박승훈,이정훈,김성우,임재환,류지열,Park, Seung-Hun,Lee, Jung-Hoon,Kim, Sung-Woo,Lim, Jae-Hwan,Ryu, Jee-Youl 한국정보통신학회 2012 한국정보통신학회논문지 Vol.16 No.6
In this research, we propose a momentum measurement system using the accelerometer sensor, MCU, and Bluetooth to measure the exact momentum. The proposed system can figure out information for the real time travel distance. We performed various experiments, and analyzed the results using the proposed momentum measurement system. In the simulation experiments, we compared the reliability and accuracy for the existing momentum measurement systems from the analyzed results. The proposed system showed travel distance error of less than 8% as compared to the existing system with the error of approximately 13%. We expect that the proposed system apply to the commercial products. 본 연구에서는 정확한 운동량 측정을 위하여 가속도 센서, MCU, 그리고 블루투스를 이용한 운동량 측정 시스템을 제안한다. 이러한 시스템은 실시간 무선으로 이동거리 정보를 정확하게 측정할 수 있다. 제작한 운동량 측정 시스템을 이용하여 다양한 모의실험을 하였고, 그 결과를 분석하였다. 분석한 결과를 기성품과 신뢰성 및 정확도에 측면에서 비교를 하였다. 본 연구에서 제안하는 시스템은 13% 정도의 이동거리 오차를 가지는 기성품에 비해 8%이하의 우수한 오차를 보였다. 이러한 시스템은 소형화되어 기성품에 적용되리라 기대한다.
안전한 통학로 조성을 위한 보행자-차량간 교통사고와 학교주변의 물리적 환경과의 연관성 연구
박승훈(Park, Seung-Hoon) 대한건축학회 2014 대한건축학회논문집 Vol.30 No.8
The purpose of this study is to explore environmental correlates of pedestrian-vehicle collisions within walkable distance from neighborhood schools in order to promote safe walking environment around schools. For this research, the total number of pedestrian-vehicle collisions occurred around each neighborhood school for 2000 through 2004 is measured as an indicator of the safety level of walking environment around schools. A negative binomial regression model is employed for spatial quantitative analysis. The result of spatial analysis indicates that sidewalk density, traffic signal density, cul-de-sac density, the number of fast-food restaurants, the number of parking lots, and the number of residential units are positively associated with pedestrian-vehicle collisions. However, it is found that the number of play grounds, the percentage of single-family housing areas, the percentage of mixed use areas, and average property value have negative association with pedestrian-vehicle collisions. These key findings of this research contribute to better understanding of the gaps in the current knowledge, for safe routes to school, regarding safe walking environment around neighborhood schools by providing new substantive knowledge regarding the significant effects of the physical environment on pedestrian-vehicle collisions.
건물 부하를 포함한 바닥 난방 시스템 모델 제안 및 제어목적 파라미터 최적화 방안
박승훈(Seung Hoon Park),장용성(Yong Sung Jang),김의종(Eui-Jong Kim) 대한설비공학회 2018 설비공학 논문집 Vol.30 No.8
Floor heating has been used as a typical heating system in residential buildings, particularly in Korea. Several studies have been conducted on the systems especially for optimal control, since the control of the systems is not trivial for their high thermal capacities. This study also proposes a method for modeling floor-heating systems for their control. A lumped thermal-resistance (R) and heat-capacity (C) model is proposed, and an optimization method is combined to maintain accuracy in a low-order model scheme. The parameters of the RC model are set as unknownvalues, and the PSO (particle swarm optimization) method is used to fit the model to the reference results, which show that the proposed model is in good agreement with the reference and with previously developed models.
박승훈(Park Seung Hoon),김중헌(Joongheon Kim) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2
본 논문에서는 이미지 분야 딥러닝에서 훈련에 필요한 데이터의 부족으로 인한 모델 결과의 편향성을 평준화하는 기법인 데이터 증폭 기법으로 CutMix, CutOut, Mixup, Mosaic에 대해서 다루며, 해당 기법들이 모델의 결과에 어느정도 영향을 미치는지에 대해서 소개한다.
24시간 활동성 혈압과 임상 혈압과의 비교 및 좌심실 비대와의 상관관계
박승훈 ( Seung Hoon Park ),방덕원 ( Duk Won Bang ),서존 ( John Seo ),홍성욱 ( Sung Wook Hong ),김도회 ( Do Hoi Kim ),윤여준 ( Yeo Joon Yoon ),안지훈 ( Ji Hoon Ahn ),현민수 ( Min Su Hyon ),김성구 ( Sung Koo Kim ),권영주 ( Young Jo 대한내과학회 2007 대한내과학회지 Vol.72 No.2
Background: This study compared the results of 24 hour ambulatory blood pressure monitoring with the clinical blood pressure measurements, and we investigated the relationship of the blood pressure measurement and left ventricular hypertrophy, as determined by routine 12 lead electrocardiography. Methods: We studied 204 healthy adults with no prior history of heart disease or antihypertensive medication. The clinic blood pressure was measured 3 times and the average was taken. We compared the clinic blood pressure with the daytime blood pressure of the 24 hour ambulatory blood pressure monitoring, and we compared the blood pressure with the sum of the voltage of the S wave on V1 and the R wave on V5. Results: The average of the daytime ambulatory blood pressure of all the patients was 135.33±13.73 mmHg for the systolic pressure and 86.55±10.14 mmHg for the diastolic pressure. The average of the clinic blood pressure measurement was 140.10±17.41 mmHg for the systolic pressure and 88.84±10.14 mmHg for the diastolic pressure. The clinic blood pressure averaged higher than the daytime ambulatory blood pressure by 5 mmHg on the systolic pressure and 2 mmHg on the diastolic pressure (p<0.001). The normal ambulatory blood pressure limits were estimated as those that best correlated with 140/90 mmHg at the clinic. The estimated value was 135/87 mmHg for the daytime ambulatory blood pressure (p<0.001). The incidence of white coat hypertension was 10.8%. The sum of the voltage on electrocardiography showed a positive linear relationship with all the blood pressure measurements. The daytime systolic blood pressure showed the strongest correlation with the 24 hour ambulatory blood pressure monitoring (r=0.283, p<0.001). Conclusions: We found a linear relation and we analyzed the differences between the clinical and 24 hour ambulatory blood pressure. A daytime ambulatory blood pressure value of 135/87 mmHg was a suitable upper normal limit for the corresponding cutoff value of the clinic blood pressure. Left ventricular hypertrophy showed the strongest relationship with the daytime systolic blood pressure among the results of the 24 hour ambulatory blood pressure monitoring. (Korean J Med 72:181-190, 2007)