• Title, Summary, Keyword: 트래킹

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Classification of Online Tracking Technology and Implications in User Perspective (온라인 트래킹 기술 분류 및 이용자 관점에서의 시사점)

  • Lee, Bohan;Rha, Jong-Youn
    • Journal of Digital Convergence
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    • v.16 no.9
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    • pp.159-172
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    • 2018
  • This study searched and analyzed online tracking technologies. It tried to understand what to consider when establishing policies related to online tracking. Online tracking technologies were classified into 'general cookies', 'super cookies', 'fingerprinting', 'device ID tracking' and 'cross-device tracking'. Political considerations should include the layers of online tracking, the subjects of tracking technology, purpose of use, duration and storage format of information, and development of technology. The implications of this study are as follows: first, policy makers and industry should be aware that the degree of risk perceived by users may vary according to the characteristics of online tracking technology. Secondly, it is necessary to understand factors that affect the classification of online tracking technology. Finally, in the industry, preemptive measures such as building an integrated privacy system are needed to relieve anxiety of users and to build trust.

Tracking Propagation Mechanism on the Surface of Polyvinyl-Chloride-Sheathed Flat Cord based on Electric Field Analysis and Gas Discharge Physics (전계해석과 기체방전 이론을 기반으로 한 Polyvinyl-Chloride-Sheathed Flat Cord 표면의 트래킹 진전 메커니즘)

  • Lim, Dong-Young;Park, Herie;Jee, Seung-Wook
    • Fire Science and Engineering
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    • v.33 no.2
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    • pp.30-38
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    • 2019
  • Tracking, which is one of the main causes of electrical fires, is perceived as a physical phenomenon of electrical discharge. Hence tracking should be explained based on electric field analysis, conduction path by electron generation, and gas discharge physics. However, few papers have considered these details. This paper proposes a tracking mechanism including their effects on tracking progress. In order to prove this mechanism, a tracking experiment, an electric field analysis for the carbonization evolution model, and an explanation of the tracking process by gas discharge physics were conducted. From the tracking experiment, the current waveforms were measured at each stage of the tracking progress from corona discharge to tracking breakdown. The electric field analysis was carried out in order to determine the electric field on the surface of a dry-band and the high electric field region for electron generation during the generation and progress of carbonization. In this paper, the proposed tracking mechanism consisted of six stages including electron avalanche by corona discharge, accumulation of positive ions, expansion of electron avalanche, secondary electron emission avalanche, streamer, and tracking by conductive path. The pulse current waveforms measured in the tracking experiment can be explained by the proposed tracking mechanism. The results of this study will be used as the technical data to detect tracking phenomenon, which is the cause of electric fire, and to improve the proof tracking index.

A Comparative Study on the Event-Retrieval Performances of Event Tracking and Information Filtering (사건트래킹과 정보필터링 기법의 사건검색 성능 비교연구)

  • Chung, Young-Mee;Chang, Ji-Eun
    • Journal of the Korean Society for information Management
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    • v.20 no.3
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    • pp.111-127
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    • 2003
  • The purpose of this study is to ascertain whether event tracking is more effective in event retrieval than information filtering. This study examined the two techniques for event retrieval to suggest the more effective one. The event-retrieval performances of the event tracking technique based on a kNN classifier and the query-based information filtering technique were compared. Two event tracking experiments, one with the static training set and the other with the dynamic training set , were carried out. Two information filtering experiments, one with initial queries and the other with refined queries, were also carried out to evaluate the event-retrieval effectiveness. We found that the event tracking technique with the static training set performed better than on with the dynamic training set. It was also found that the information fitering technique using intial queries performed better than one using the refined queries. In conclusion, the comparison of the best cases of event tracking and information filtering revealed that the information filtering technique outperformed the event tracking technique in event retrieval.

Possibility of Are Tracking at the Circuit Breaker After Starting Fire (화재발생 이후 분전반 차단기에서의 트래킹현상 진행 가능성)

  • Park, Y.G.;Oh, D.H.;Lee, S.H.;Park, J.T.;Kim, J.P.
    • Journal of Korean Institute of Fire Investigation
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    • v.10 no.1
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    • pp.37-45
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    • 2007
  • In this paper, the possibility of arc tracking, caused by combustion at the circuit breaker, was discussed. The arc tracking, occurred at the source terminals of all the circuit breakers, when we burned electric leakage circuit breakers with 220V applied. We had a same results of the experiment to simulate fire scene, in the circumstance of fire, all of the circuit breakers had arc tracking caused by combustion. Therefore we confirmed that the arc tracking at the source terminal of circuit breaker could be occurred by just combustion in the fire scene, and it was impossible to decide the cause of fire for reason of discriminating arc tracking at the terminals of circuit breaker.

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A study on the Fire Hazard for the Tracking of Thermostat (서모스탯의 트래킹 화재위험성에 관한 연구 (냉온수기 서모스탯 트래킹 발생 메커니즘 및 감식.감정 기법에 관한 연구))

  • Kim, Soo-Young
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • pp.44-47
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    • 2011
  • 본 연구는 냉온수기에 사용되는 서모스탯을 예를 들어 전기기기에 온도컨트롤로 많이 사용되고 있는 서모스탯의 트래킹 화재 위험성 및 원인 분석을 위한 감정 기법에 관한 연구로서 트래킹을 발생시킬 수 있는 환경적 요인 및 오염액의 전도도 측정과 화재 후 트래킹에 의한 화재 원인 규명을 위한 감식 감정 기법에 관한 연구를 수행하여 화재 예방대책의 기초자료를 제시 하고자 한다.

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Development of real-time camera tracking and dense reconstruction algorithm for representing occlusion effect in augmented reality contents (증강현실에서 가려짐 표현을 위한 실시간 영상 트래킹 및 조밀 복원 알고리즘)

  • Kang, Hyun;Kim, Jae-Heon;Koo, Bonki
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • pp.297-298
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    • 2018
  • 증강현실 콘텐츠에서 가려짐 표현은 사실감을 위한 필수적이다. 가려짐이란 가상 물체의 일부가 실제 사물에 의해서 가려져서 표현되는 것을 의미한다. 이는 카메라의 트래킹 정보와 함께 현재 관찰하고 있는 실제 세계의 3차원 스캔 정보를 같이 획득해야 한다. 카메라 트래킹이란 현재 카메라가 세상의 어디에 위치해있는지, 어떤 자세로 바라보고 있는지에 대한 정보를 실시간으로 획득하는 기술이다. 3차원 스캐닝이란 실제 물체를 이루는 모든 점들의 3차원 위치 관계를 파악하는 과정이다. 가상물체의 3차원 위치와 자세가 실제물체의 위치/자세와의 관계를 통해서 가상물체의 그려야할 부분과 그리지 말아야할 부분을 판단할 수 있다. 본 논문에서는 트래킹과 스캐닝을 동시에 처리하여 가려짐 표현이 가능한 증강현실용 트래킹 기술을 제안한다. 카메라 트래킹이 실내외에서도 제약없이 동작하기 위해서 스테레오 카메라를 활용하였다. 트래킹은 카메라 프레임간 특징점들의 상호 관계를 파악하는 방법에 의해서 구하였다. 스테레오 카메라 이미징을 통해서 매 프레임마다 실세계의 3차원 깊이정보를 파악하게 되고, 이를 앞서구한 카메라 위치자세를 통해서 3차원 깊이 데이터를 병합하는 과정으로 스캐닝기술을 구현하였다.

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A study on the Tracking Characteristics of Contaminated Insulating Materials of RCD (오염된 누전차단기 절연재료의 트래킹 특성에 관한 연구)

  • Lee, Chun-Ha;Ok, Kyung-Jae;Kim, Shi-Kuk;Jee, Seung-Wook
    • Fire Science and Engineering
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    • v.22 no.5
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    • pp.67-71
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    • 2008
  • This experimental study showed the tracking characteristics of contaminated insulating materials of RCD. Electrolytes is made by IEC(International Electrotechnical Commission) 60589, NaCl added to deionized water as each 0.1 wt%. The used test equipment is application to KS(Korean Industrial Standard) C IEC 60112. The used samples is RCD(Residual Current Device) of tree companies. It is investigated carbonic electric conductive pass growth time and tracking growth form that contaminated insulators materials of RCD. As a result, carbonic electric conductive pass growth time and tracking growth form was different each companies. Track growth time of contaminated insulating materials was faster than non-contaminated.

Improved Tracking System and Realistic Drawing for Real-Time Water-Based Sign Pen (향상된 트래킹 시스템과 실시간 수성 사인펜을 위한 사실적 드로잉)

  • Hur, Hyejung;Lee, Ju-Young
    • Journal of the Korea Society of Computer and Information
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    • v.19 no.2
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    • pp.125-132
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    • 2014
  • In this paper, we present marker-less fingertip and brush tracking system with inexpensive web camera. Parallel computation using CUDA is applied to the tracking system. This tracking system can run on inexpensive environment such as a laptop or a desktop and support for real-time application. We also present realistic water-based sign pen drawing model and implementation. The realistic drawing application with our inexpensive real-time fingertip and brush tracking system shows us the art class of the future. The realistic drawing application, along with our inexpensive real-time fingertip and brush tracking system, would be utilized in test-bed for the future high-technology education environment.

Adaptive Keyframe-Based Tracking for Augmented Books (증강 책을 위한 적응형 키프레임 기반 트래킹)

  • Yoo, Jae-Sang;Cho, Kyu-Sung;Yang, Hyun-S.
    • Journal of KIISE:Computing Practices and Letters
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    • v.16 no.4
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    • pp.502-506
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    • 2010
  • An augmented book is an application that augments such multimedia elements as virtual 3D objects generated by computer graphics, movie clips, or sound clips to a real book using AR technologies. It is intended to bring additional education and entertainment effects to users. For augmented books, this paper proposes an adaptive keyframe-based page tracking method to estimate the camera's 6 DOF pose in real-time after recognizing a page and performing wide-baseline keypoint matching. For a page tracking, proposed method in this paper chooses a proper keyframe and performs a tracking in two step of coarse-to-fine stage. As a result, the proposed method in this paper guarantees a robust tracking to view-point and illumination variations and real-time.