http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Object Tracking and Elimination using Level-of-Detail Canny Edge Maps
Park, Jihun Research Institute of Science and Technology HONGI 2005 Hongik Journal of Science and Technology Vol.9 No.-
We propose a simple method for tracking a nonparameterized subject contour in a single video stream with a moving camera. Then we eliminate the tracked contour object by replacing the background scene we get from other frame that is not occluded by the tracked object. Our method consists of two parts: first we track the object using LOD (Level-of-Detail) canny edge maps, then we generate background of each image frame and replace the tracked object in a scene by a background image from other frame. In order to track a contour object, LOD Canny edge maps are generated by changing scale parameters for a given image. A simple (strong) Canny edge map has the smallest number of edge pixels while the most detailed Canny edge map, Wcanny_(N) , has the largest number of edge pixels. To reduce side-effects because of irrelevant edges, we start our basic tracking by using simple (strong) Canny edges generated from large image intensity gradients of an input image, called Scanny edges. Starting from Scanny edges, we get more edge pixels ranging from simple Canny edge maps until the most detailed (weaker) Canny edge maps, called Wcanny maps along LOD hierarchy. LOD Canny edge pixels become nodes in routing, and LOD values of adjacent edge pixels determine routing costs between the nodes. We find the best route to follow Canny edge pixels favoring stronger Canny edge pixels. The first frame background scene is determined by camera motion, and other background scenes are computed from the previous background scenes.
Jihun Kang(Jihun Kang),Taeyun Kim(Taeyun Kim),Kyung-Do Han(Kyung-Do Han),Jin-Hyung Jung(Jin-Hyung Jung),Su-Min Jeong(Su-Min Jeong),Yo Hwan Yeo(Yo Hwan Yeo),Kyuwon Jung(Kyuwon Jung),Hyun Lee(Hyun Lee) 한국역학회 2023 Epidemiology and Health Vol.45 No.-
OBJECTIVES: We examined the associations of socioeconomic factors, health behaviors, and comorbidities with early-onset lung cancer. METHODS: The study included 6,794,287 individuals aged 20-39 years who participated in a Korean national health check-up program from 2009 to 2012. During the follow-up period, 4,684 participants developed lung cancer. Multivariable Cox regression analysis was used to estimate the independent associations of potential risk factors with incident lung cancer. RESULTS: Older age (multivariable hazard ratio [mHR], 1.13; 95% confidence interval [CI], 1.12 to 1.14) and female sex (mHR, 1.62; 95% CI, 1.49 to 1.75) were associated with increased lung cancer risk. Current smoking was also associated with elevated risk (<10 pack-years: mHR, 1.12; 95% CI, 1.01 to 1.24; ≥10 pack-years: mHR, 1.30; 95% CI, 1.18 to 1.45), but past smoking was not. Although mild alcohol consumption (<10 g/day) was associated with lower lung cancer risk (mHR, 0.92; 95% CI, 0.86 to 0.99), heavier alcohol consumption (≥10 g/day) was not. Higher income (highest vs. lowest quartile: mHR, 0.86; 95% CI, 0.78 to 0.94), physical activity for at least 1,500 metabolic equivalent of task-min/wk (vs. non-exercisers: mHR, 0.83; 95% CI, 0.69 to 0.99) and obesity (vs. normal weight: mHR, 0.89; 95% CI, 0.83 to 0.96) were associated with lower lung cancer risk, whereas metabolic syndrome was associated with increased risk (mHR, 1.13; 95% CI, 1.03 to 1.24). CONCLUSIONS: In young adults, age, female sex, smoking, and metabolic syndrome were risk factors for early-onset lung cancer, while high income, physical activity, and obesity displayed protective effects.
Hybrid Secondary Voltage Control combined with Large-Scale Wind Farms and Synchronous Generators
Jihun Kim,Hwanik Lee,Byongjun Lee,Yong Cheol Kang 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.2
For stable integration of large-scale wind farms, integration standards (Grid codes) have been proposed by the system operator. In particular, voltage control of large-scale wind farms is gradually becoming important because of the increasing size of individual wind farms. Among the various voltage control methods, Secondary Voltage Control (SVC) is a method that can control the reactive power reserve of a control area uniformly. This paper proposes hybrid SVC when a large-scale wind farm is integrated into the power grid. Using SVC, the burden of a wind turbine converter for generating reactive power can be reduced. To prove the effectiveness of the proposed strategy, a simulation study is carried out for the Jeju system. The proposed strategy can improve the voltage conditions and reactive power reserve with this hybrid SVC.
Rectal Injury Associated with Pelvic Fracture
( Jihun Gwak ),( Min A Lee ),( Byungchul Yu ),( Kang Kook Choi ) 대한외상학회 2016 大韓外傷學會誌 Vol.29 No.4
Rectal injury is seen in 1-2% of all pelvic fractures, and lower urinary tract injury occurs in up to 7%. These injuries are rare, but if missed, can lead to a severe septic response. Rectal injury may be suspected by the presence of gross blood on digital rectal examination. However, this classic sign is not always present on physical examination. If an Antero-Posterior Compression type pelvic fracture is seen, we should consider the possibility of rectal and lower urinary tract injury. It is important to define the anatomic location of the rectal injury as it relates to the peritoneal reflection. Trauma to the intraperitoneal rectum should be managed as a colonic injury. Extraperitoneal rectal injury should be managed with fecal diversion regardless of primary repair. We present the case of a 46-year-old man who was referred to our hospital following a major trauma to the pelvis in a pedestrian accident. [ J Trauma Inj 2016; 29: 201-203 ]
Collision Reduction for Machine Type Communications in LTE-A Networks
Jihun Moon,Yujin Lim 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.9
LTE-A networks provide excellent wireless connectivity for MTC (Machine Type Communication). In order to connect a large number of MTC devices into one network, many signaling messages should be transmitted. The signaling channel is overloaded for the messages and accesses of MTC devices are failed. 3GPP specifies access class barring scheme to resolve the overload problem but leaves a specific algorithm to configure a parameter as an implementation issue. In this paper, we present an algorithm to dynamically configure a parameter based on the number of colliding devices in access class barring scheme. Through simulations, it is shown that our algorithm improves the performance compared to the original access class barring in terms of access success, access failure, collision, and access delay.