Naver Corporation

About: Naver Corporation is a company organization based out in Seongnam-si, South Korea. It is known for research contribution in the topics: Terminal (electronics) & Computer science. The organization has 4038 authors who have published 4294 publications receiving 35045 citations. The organization is also known as: NAVER Corporation & NAVER.

Object-Tracking System Using Combination of CAMshift and Kalman filter Algorithm

Abstract: In this paper, we describe a strongly improved tracking method using combination of CAMshift and Kalman filter algorithm. CAMshift algorithm doesn`t consider the object`s moving direction and velocity information when it set the search windows for tracking. However if Kalman filter is combined with CAMshift for setting the search window, it can accurately predict the object`s location with the object`s present location and velocity information. By using this prediction before CAMshift algorithm, we can track fast moving objects successfully. Also in this research, we show better tracking results than conventional approaches which make use of single color information by using both color information of HSV and YCrCb simultaneously. This modified approach obtains more robust color segmentation than others using single color information.

Spiral Arm Morphology in Cluster Environment

Abstract: We examine the dependence of the morphology of spiral galaxies on the environment using the KIAS Value Added Galaxy Catalog (VAGC) which is derived from the Sloan Digital Sky Survey (SDSS) DR7. Our goal is to understand whether the local environment or global conditions dominate in determining the morphology of spiral galaxies. For the analysis, we conduct a morphological classiflcation of galaxies in 20 X-ray selected Abell clusters up to z»0.06, using SDSS color images and the X-ray data from the Northern ROSAT All-Sky (NORAS) catalog. We analyze the distribution of arm classes along the clustercentric radius as well as that of Hubble types. To segregate the efiect of local environment from the global environment, we compare the morphological distribution of galaxies in two X-lay luminosity groups, the low-Lx clusters (Lx 1:8 £ 10 44 erg/s). We flnd that the morphology-clustercentric relation prevails in the cluster environment although there is a brake near the cluster virial radius. The grand design arms comprise about 40% of the cluster spiral galaxies with a weak morphology-clustercentric radius relation for the arm classes, in the sense that ∞occulent galaxies tend to increase outward, regardless of the X-ray luminosity. From the cumulative radial distribution of cluster galaxies, we found that the low-Lx clusters are fully virialized while the high-Lx clusters are not.

응급구조과 학생의 임상실습 만족도

Abstract: 이 연구는 임상실습을 경험한 응급구조과 학생들을 대상으로 임상실습 만족도를 조사하였다. 연구결과는 실습만족도 평균 3.61( ${\pm}0.70$ )이었으며, 일반적 특성에 따른 실습만족도에 유의한 항목은 희망취업분야(F=3.98, p=0.004)이었다. 실습실태에 따른 실습만족도에 유의한 항목은 실습시작학년(t=0.43, p=0.038), 실습기간(F=2.82, p=0.025), 담당부서(F=11.81, p=0.000)이었다. 임상실습 술기와 실습만족도와의 상관관계에서는 관찰횟수(r=0.221, p=0.000), 시행횟수(r=0.170, p=0.002)는 실습만족도와의 유의한 양의 상관관계가 있었다. 이상의 연구결과로 응급구조과 학생들의 임상실습 만족도를 향상시키기 위해서는 확고한 직업관을 가져야 할 것이며, 임상실습 시작학년과 실습기간을 응급구조과 학생의 특성에 맞게 고려해야 할 것이다. 또한 실습기관에서 실습을 담당하는 부서 역시 응급구조과라는 특수성을 고려해야 할 것이며, 실습만족도를 높이기 위한 실습프로그램 개발 연구가 필요할 것이다. 【This study analysed Emergency Medical Technology(EMT) students' satisfaction in clinical practice. It was discovered that satisfaction was a means of 3.61( ${\pm}0.70$ ) and the factor which had a significant influence on satisfaction was desired job area (F=3.98, p=0.004). The factors which were significant to satisfaction were practice beginning grade(t=0.43, p=0.038), period of practice(F=2.82, p=0.025), and departments(F=11.81, p=0.000) In respect to significant positive correlations between practice procedures and satisfaction, observation frequency (r=0.221, p=0.000) and practice frequency(r=0.170, p=0.002) had significantly positive correlations with satisfaction. Based on the results above, it is suggested that to enhance EMT students' satisfaction in clinical practice, students should have clear points of view on their job and practice beginning grade and practice period should be properly considered according to characteristics of students. Also, effective practice programs which carefully consider peculiarity of Emergency Medical Technology should be developed further.】

Method, system, and recording medium for connecting public transportation route service and map service

Abstract: Disclosed are a method, system, and recording medium for connecting a public transportation route service and a map service. A map providing method includes providing a mode switching function at a first service that provides a public transportation map and a second service that provides a road map, and switching a service mode to the public transportation map or the road map through interconnection between the first service and the second service in response to executing the mode switching function.

Development of simulation model for fuel efficiency of agricultural tractor

Abstract: The objective of this study is to predict the fuel efficiency of an agricultural tractor. The fuel efficiency of the tractor during rotary tillage was predicted using numerical modeling. A numerical model was developed using Simulation X. Based on tractor power flow, numerical modeling consisted of an engine, transmission, PTO (power take off), and hydraulics. The specifications of major components utilized in the numerical model were the same as those of a 71 kW tractor (field test tractor). The load that was inputted for fuel efficiency prediction into the simulation model was obtained from a field test. Fuel efficiency predictions were conducted by comparing field test results and simulation results. In addition, it was performed by dividing the rotary tillage and steering section. Main results are as follows: first, t-values of engine torque were measured to be 0.31 in the rotary tillage and 0.92 in the steering section. Second, t-values of fuel consumption were measured to be 0.51 and 5.41 in the rotary tillage and the steering section, respectively. Finally, t-values of fuel efficiency were measured to be 1.72 and 40 in the rotary tillage and the steering section, respectively. The results show no significant differences with t-values of less than 5% in the rotary tillage. But, it shows significant differences in the steering section. Therefore, simulation for accurate fuel efficiency prediction requires a suitable algorithm or detailed design of the simulation model in the steering section.