• The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
• /
• v.16 no.3 s.55
• /
• pp.26-32
• /
• 2005

RFID 기술은 사물에 전자 태그를 부착하여 무선으로 사물의 ID를 인식하여 정보를 수집하고 주변상황 정 보를 감지하고 수집 된 정보를 저 장, 가공, 추적함으로써 사물에 대한 측위, 원격처리, 관리 및 사물간 정보 교환 등의 서비스를 제공하는 기술이다. 특히,.미 관세청에서 2005년 미국에 수출되는 컨테이너에 RFID 태그를 부착하는 정책을 발표하여 2006년부터는 능동형 RFID 태그를 이용한 컨테이너 통관을 시행할 예정이며, 현재 태그 부착은 의무 사항은 아니지만 선별적으로 컨테이너 전수 검사를 실시한다는 방침이어서 반강제적인 성격을 지닌 것으로 판단할 수 있다. 또한, 물류 산업의 변화의 대세에 따라 제조업체의 생산품이 유통 과정을 거쳐 항만에서 처리되는 과정을 실시간으로 추적이 가능함은 물론이고 나아가서 외국 항만과의 연계를 통하여 수출입 전 과정의 추적성을 파악하고 거기에 다른 시스템의 효율적인 통합을 이루어 언제 어디서나 화물의 추적과 관리가 가능한 유비쿼터스 환경의 선진화된 항만 시스템을 구축할 수 있다. 본고에서는 항만 물류용 능동형 RFID 기술과 관련하여 시스템 구성 요소 및 관련 기술 동향, 항만 물류 시스템의 응용에 대해 알아본다.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.10 no.5
• /
• pp.77-82
• /
• 2010

The tracking performance of the big tracking antenna system using Radio Frequency is very important for the tracking and position measuring for the flight vehicle, but the precise measuring of the tracking performance is not easy, especially for the big antenna system such as ground telemetry antenna or tracking radar in space application because it's characteristics could be different in accordance with the antenna direction. In this paper, the error factors impacting on the tracking performance (pointing accuracy and tracking accuracy) and the ranges of each factor are reviewed, and the simple and efficient method to measure the tracking performance is introduced which using low earth orbit as the signal source. Finally, the measurement results for the telemetry ground antenna in NARO Space Center are reviewed.

• Journal of IKEEE
• /
• v.22 no.3
• /
• pp.664-671
• /
• 2018

Generally, conventional solar tracking systems employ irradiance sensors to track a sun position, which enables the system to generate maximum solar energy. The usage of irradiance sensors increases system costs and deteriorates the performance of systems from sensor malfunctions. In this paper, a new solar tracking system without irradiance sensors has been proposed in which the controller capable of controlling and monitoring remotely is based on Artik platform. The proposed system tracks the sun position by comparing the amount of currents from several solar panels, resulting in removing irradiance sensors. In order to verify the performance of the proposed solar tracking method, the 12[V]-20[W] prototype system is built and implemented. Since the proposed system has remote monitoring functions through the employment of Artik as the IoT platform, more advantages in installation, maintenance and expanded functionality can be obtained compared to the conventional solar tracking system.

• The Journal of the Korea Contents Association
• /
• v.15 no.2
• /
• pp.11-20
• /
• 2015

In this paper, we develop an intelligent mobile surveillance system based on binary CDMA for the unmanned automatic tracking and surveillance. That is, we implement a intelligent surveillance system using the binary CDMA wireless communication technology which is applied the merit of CDMA and TDMA on it complexly. This system is able to monitor the site of the accident on network in real time and process the various situations by implementing the security surveillance system. This system pursues an object by the 360-degree using camera, expands image using a PTZ(Pan/Tilt/Zoom) camera zooming function, identifies the mobile objects image within a screen and transfers the identified image to the remote site. Finally, we show the efficiency of the implemented system through the simulation of the controlled situations, such as tracking coverage on objects, object expansion, object detection number, monitoring the remote transferred image, number of frame per second by the image output signal etc..

• Korean Journal of Environment and Ecology
• /
• v.22 no.3
• /
• pp.230-240
• /
• 2008

The primary aim of this study is to estimate the home range of a pair of raccoon dogs(Nyctereutes procyonoides koreensis) and to compare with the previous study of raccoon dogs in a rural area of Gurye, the southern part of South Korea. Radiotracking was regularly carried out on 2 raccoon dogs for 2 days every 2 months(in June, August, October and December, 2006). During the 2 days, radiotracking was usually conducted every $1{\sim}3$ hours through day and night. The analysis of tracking data with a total of $46{\sim}64$ bearings showed that the total home range size of the pair was $0.41km^2$, and mean home range size was $0.32km^2$ by 95% minimum convex polygons(MCP) estimate. The home ranges of the male and female were largely overlapping(about $70{\sim}95%$), and the sizes were not very much different from each other. However, there was a big difference between day $(0.01km^2)$ and night-time $(0.35km^2)$ home ranges, and it was largest in summer$(0.56km^2)$ and smallest in winter $(<0.01km^2)$. In addition, the home range of the pair included 1 core area and 4 different feeding areas. In conclusion, our raccoon dog home range data using the same individuals but with more frequent bearings per day and more extended tracking intervals still showed very similar results to the previous study with less frequent bearings per day and more extensive tracking days.

• Journal of Korea Game Society
• /
• v.7 no.3
• /
• pp.59-66
• /
• 2007

Ray tracing is one of the classical global illumination methods to generate a photo-realistic rendering image with various lighting effects such as reflection and refraction. However, there are some restrictions on real-time applications because of its computation load. In order to overcome these limitations, many researches of the ray tracing based on GPU (Graphics Processing Unit) have been presented up to now. In this paper, we implement the ray tracing algorithm by J. Purcell and combine it with two methods in order to improve the rendering performance for interactive applications. First, intersection points of the primary ray are determined efficiently using rasterization on graphics hardware. We then construct the acceleration structure of 3D objects to improve the rendering performance. There are few researches on a detail analysis of improved performance by these considerations in ray tracing rendering. We compare the rendering system with environment mapping based on GPU and implement the wireless remote rendering system. This system is useful for interactive applications such as the realtime composition, augmented reality and virtual reality.

• 한국IT서비스학회:학술대회논문집
• /
• 2006.11a
• /
• pp.523-531
• /
• 2006

RFID(Radio Frequency Identification) 기술은 각 사물에 부착된 태그로부터 사물의 정보 및 주변 환경을 무선으로 인식하고, 해당정보를 수집, 저장, 가공, 추적함으로써 사물에 대한 측위, 원격처리, 관리 및 사물 간 정보 교환 등 다양한 서비스를 제공하는 기술이다. 이러한 RFID 기술을 이용한 모바일 RFID 기술은 RFID 리더에 이동성을 부여하여 언제 어디서든 사용자와 사물과의 정보교환을 가능하게 한 것이다. KT는 새로운 성장엔진으로 이동 중에도 초고속 인터넷 서비스를 이용할 수 있는 휴대인터넷 서비스인 와이브로(Wibro) 서비스를 상용화 하였고 이 와이브로망과 모바일 RFID 기술을 접목한 새로운 개념의 와이브로 RFID 서비스를 개발하고 있다.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.35 no.11A
• /
• pp.1078-1084
• /
• 2010

The tracking performance of a big parabola tracking antenna system for tracking and receiving of the signal from the vehicle is impacted by many factors of the internal and the external of the system. In this paper, we analyze the tracking error due to the radio refraction in the application of the tracking and positioning of the vehicle by using radio frequency. The real measurement data are used for the analysis which had been acquired by using GPS and the tracking systems of C- and S-band frequencies in NARO Space centre. To verify the correlation between the tracking errors measured and the radio refraction, we review the error factors and the accuracies of the tracking systems, and the characteristics of the refractivity. The analysis shows that there are angular errors which are due to the radio refraction and not to be neglected, compared to the accuracies of the tracking systems, in case of low elevation angle less than 10 degrees. Also, the tracking errors depend on the target altitude as well as the elevation angle for the case of the target in the troposphere. It is recommended to correct the tracking angle considering the target altitude and elevation angle for the precise target positioning.

• Journal of Digital Convergence
• /
• v.11 no.6
• /
• pp.159-167
• /
• 2013

Development of infusion pumps enabled injecting medical substances continuously and automatically to patients in hospitals. However, in cases when patients encountered emergent situations when moving to other areas, no clear measures were taken. The problem is that even the lightest error in injecting medical substances could be critical to the patient. That is why we proposes a remote infusion monitoring system using wireless network and RFID technology in this paper. When a problem occurs in the infusion pump, the medical personnel are informed of their patients' emergent situation and location information via wireless network so not only can they swiftly and accurately provide medical services but also can prevent safety accidents due to infusion pumps.

• Convergence Security Journal
• /
• v.16 no.3_2
• /
• pp.25-32
• /
• 2016

Drone refers to an unmanned flying system according to the remote control. That is a remote control systems on the ground or a system that automatically or semi auto-piloted system without pilot on board. Drones have been used and developed before for military purposes. However there are currently utilized in a variety of areas such as logistics and distribution of relief supplies disaster areas, wireless Internet connection, TV, video shooting and disaster observation, tracking criminals etc. Especially it can be actively used in activities such as search or the structure of the disaster site, and may be able to detect the movement of people and an attacker using an infrared camera at night. Drones are very effective for private security.