• Electronics and Telecommunications Trends
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• v.23 no.1 s.109
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• pp.99-108
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• 2008

3G LTE 이동통신 시스템은 패킷 데이터 전송에 기반을 둔 다양한 서비스 지원을 목표로 하는 기술로서 최대 20MHz 대역폭 기준 하향링크 최대 전송속도 100Mbps, 상향 링크 50Mbps의 전송속도를 지원한다. 그리고 데이터 전송 효율 향상, 효율적인 주파수 자원 이용, 이동성, 낮은 latency, 패킷 데이터 전송에 최적화된 기술과 서비스 품질보장 등을 제공한다. 3G LTE 시스템은 기존 시스템에 비해 주파수 및 고속의 멀티미디어 서비스를 효율적으로 사용하는 IP 네트워크로 진화되는 이동통신 시스템이다. 3G LTE 이동통신 단말은 대역폭 20MHz 기준으로 이동속도 120km/h에서 하향링크 30 Mbps, 상향링크 15Mbps의 데이터 전송속도를 지원한다. 또한, 고품질 및 고속의 멀티미디어 서비스를 제공하는 단말로서 3.5세대인 HSDPA에 반해 모바일 영상 서비스가 본격적으로 제공되는 3G LTE 이동통신 시스템의 단말이다. 본 고에서는 3G LTE 이동통신 시스템 단말 플랫폼 기술 동향과 전망에 대하여 논의한다. II장에서는 3G LTE 표준 규격을 기반으로 구현하는 3G LTE 이동통신 시스템 및 단말 플랫폼을 서술하며, III장에서는 국ㆍ내외 단말 플랫폼 기술 동향에 관한 내용을 기술한다. IV장에서는 향후 발전 전망에 대해 살펴보고, 마지막으로 결론을 맺고자 한다.

• Science of Emotion and Sensibility
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• v.20 no.1
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• pp.31-40
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• 2017

The present study used one of research techniques which is eye gaze tracking for neuromarketing. When pupil's size of men dilated over than three sigma (0.135%), the interest and eye movement in observation were measured. According to statistical analysis of previous studies, three sigma range is meaningful therefore sigma range was used as operational definition because 'pupil dilatation' is difficult to be define in eye gaze tracking data. Pictures of basketball games were selected as visual stimuli and 90% effective ratio of total 7,200 data were calculated. Thus, 29 of 34 participants were used for test. Pupil's size was calculated by applying pupil's width and height into a formular; [Pupil's size = Pupil width/2${\times}$Pupil height/$2{\times}{\pi}$]. In conclusion, billboard utilized for sports marketing had meaningless effects because gaze frequency to basketball player and surrounding environment was higher than that to billboard when participantsas game spectators diltaed their pupil's size over than three sigma. Thus, it was required using new marketing strategies like neuromarketing to increase utility through the present study.

• Journal of Digital Convergence
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• v.12 no.4
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• pp.51-68
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• 2014

Today's public sector information is considered an important national asset that has social and economic value. Hence, developed countries are competitively promoting various policies to actively promote access to public sector information and the use of such information for private purposes. The Korean government is also boosting the Government 3.0 policy as a new governmental management paradigm that supports the creative economy. Despite these governmental efforts, since open public sector information is only classified from the supplier's perspective, it is difficult to have access to information for private application from the consumer's perspective and expand private applications because of the problems in identifying the information source. In this study, the concept of data from the user's perspective for the activation of private applications was defined by focusing on public sector information obtained by affiliated organizations of the Ministry of Science, ICT and Future Planning(MSIP). The new classification system was designed by analyzing the classification system of conventional open services of public sector information through investigation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.612-614
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• 2018

Today, technologies that can acquire modeling data by using image are emerging. That 3D modeling production method, which is frequently utilized in contents industries, creates modeling data by using creator's intuitive sense, with drawings sketched without accurate measurement tools is also true. Recently, technologies that can facilitate modification and amendment of existing design by producing and reorganizing three-dimensional data of a sculpture through combination of image information are developing. This thesis gives suggestion of how to utilize and study the way to produce accurate three-dimensional modeling data by utilizing multiple image data.

• The Journal of the Korea institute of electronic communication sciences
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• v.3 no.2
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• pp.71-78
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• 2008

The sensor node's performance is expected to be improved and the price will be largely decreased. As USN-applied field is expanded, multiple application services are expected to be provided through one USN soon. Multiple applications be required a periodic data reporting, consecutive information monitoring, event-driven data and query-based data as the data pattern that USN is delivered. Accordingly, the mechanism which can assure QoS according to each data characteristic is required. In this paper, A proposed protocol apply the duty cycle of S-MAC protocol variably and flexible according QoS level. This method largely reduces the delay on the delay-sensitive traffic, while keeping the energy efficiency.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11c
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• pp.1811-1814
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• 2002

본 논문에서는 3차원 데이터베이스와 4S-Van 에서 획득된 GPS 관련 데이터를 이용하여 사용자에게 비디오내의 지리 객체들의 정보를 제공해 줄 수 있는 미디어 GIS 시스템 구조로 제안한다. 비디오내의 지리객체에 대한 지리정보 서비스를 위해 실세계 비디오와 3차원 그래픽 세계를 매핑할 수 있는 가상 세계 매핑(VWM; Virtual World Mapping) 이라는 새로운 상호 운용적인 지리데이터 서비스 개념을 소개한다. 제안한 기법은 임의의 비디오 프레임에 대한 3차원 가상공간을 재구성하여 지리정보 및 소성정보를 쉽게 검색해 낼 수 있다. 또한, 2차원, 3차원, 미디어 데이터간의 상호연계 및 운용기능을 제공함으로써 기존의 지리정보시스템 분야의 새로운 패러다임을 제시한다. 가상 세계 매핑기법은 기존의 비디오에서 얻어진 이미지에 대한 별도의 이미지 프로세싱 과정 없이 지리정보를 서비스 할 수 있다는 장점을 가진다. 제안된 방법을 이용하여 비디오 영상을 스트리밍하면서 클라이언트가 지리 정보서비스 받을 수 있는 GeoVideo 서버 및 웹을 통해 서비스를 제공하는 GeoVideo 클라이언트 시스템을 구현하였다.

• Journal of IKEEE
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• v.28 no.2
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• pp.180-186
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• 2024

This paper proposes an efficient fault diagnosis method for ITSC(Inter-Turn Short Circuit) in three-phase induction motors using CNN. By utilizing only the D-axis component of the D-Q synchronous coordinate system, it compares SWM(Slide Window Method) and GAF(Gramian Angular Field) methods for image encoding. Results show GAF achieving ~74% accuracy, while SWM achieves ~65%, indicating GAF's superiority by 9%. Learning time (~14.74s) remains consistent, particularly with epochs ≤ 100, showcasing faster learning.

• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.5
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• pp.77-86
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• 2016

This paper describes a dual-mode reference-less CDR(Clock Data Recovery) operating at full / half-rate and its operation algorithm. Proposed reference-less CDR consists of a frequency detector, a phase detector, a charge pump, a loop filter, a voltage controlled oscillator, and a digital block. The frequency and phase detectors operate at both full / half-rate for dual-mode operation and especially the frequency detector is capable of detecting the difference between data rate and clock frequency in the dead zone of general frequency detectors. Dual-mode reference-less CDR with the proposed algorithm can recover the data and clock within 1.2-1.3 us and operates reliably at both full-rate (2.7 Gb/s) and half-rate (5.4 Gb/s) with 0.5-UI input jitter.

• Journal of The Korean Association of Information Education
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• v.7 no.2
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• pp.199-206
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• 2003

XML is becoming a new developing tool of web technology because of its ability of data management and flexibility in data presentation. So it's well researched that the reusability and integration with learning objects such as text, image, sound, video and plug-in programs of web contents in computer education. But the research for storing, extracting and integrating metadata about learning object was needed prior to implementing online learning system to integrate and manage it. Therefore this study propose a new method of using web service of DBMS for extracting learning object's metadata in database server which located in 3-tier system. To evaluate the efficiency of proposed method, The test server and two DBMSs(MS SQL Server 2000 and Oracle 9i) which have 30 metadata was implemented and the response time of it was measured. The response time of it was short, but in order to using this method the additional programming with SAX/DOM was necessary.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.9
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• pp.348-354
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• 2018

This study proposes MF (Model Filter)-based M-BDL (MF-based BIM Data Linkage), which is a model filter-based data mapping method for BIM (Building Information Modeling)-BEMS linkage. Recently, BEMS (Building Energy Management System) is actively utilizing 3D spatial information. This allows the user to intuitively manage the facility energy linked to spatial information. To use BIM data in energy management systems, it is essential to link BEMS with BIM data only in terms of the user requirements. On the other hand, if the BIM is a rich dataset and is linked as it is, the user will need to manage the unnecessary information. By mapping only the data required for BEMS in heavy BIM data through M-BDL, the BIM data can be lightened and the amount of data required for maintenance can be reduced. This technology proposes a mapping method that can link the BIM data with the filtered BIM data.