• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• v.9 no.2
• /
• pp.1045-1048
• /
• 2005

This paper is for the design and implementation of the reader which can recognize the tag of the UHF band that we do not become internationally the standardization. Universal RFID Reader uses the software and specifies the class of UHF band. And then, it can recognize UHF band tags controlling the hardware.

• Journal of information and communication convergence engineering
• /
• v.10 no.3
• /
• pp.242-247
• /
• 2012

In the determination of suitable frame sizes associated with dynamic framed slotted Aloha used in radio frequency identification tag identification processes, the widely imposed constraint $L=2^Q$ often yields inappropriate values deviating far from the optimal values, while a straightforward use of the estimated optimal frame sizes causes frequent restarts of read procedures, both resulting in long identification delays. Taking a trade-off, in this paper, we propose a new method for determining effective frame sizes where the effective frame size changes in a multiple of a predetermined step size, namely ${\Delta}$. Through computer simulations, we show that the proposed scheme works fairly well in terms of identification delay.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2006.11a
• /
• pp.369-372
• /
• 2006

XML(eXtensible Markup language) 사용의 급속한 증가는 웹에 존재하는 많은 양의 정보들을 XML기반 데이터로 생성하게 했으며 저장과 교환에 있어서 표준이 되도록 했다. 이는 사용자에 의한 임의의 태그정의를 가능하게 하는 XML 사용의 용이성에 기반한다. 그러나 이러한 장점은 비슷한 내용을 갖는 XML 문서에 대해서 사람들마다 개개의 태그이름과 구조를 사용한다는 문제점을 만든다. 따라서 유사한 의미를 가지고 있지만 서로 다른 문서로 분류된다. 이러한 점을 개선하기 위해 XML 문서 태그들 간의 벡터 스페이스 모델과 XML 데이터를 이용하여 시소러스를 구축하는 방법 등이 연구되고 제안되어 왔지만 아직 초보적인 단계이다. 본 논문에서는 XML 문서를 구성하는 태그들을 동의어로 확장하여 벡터를 생성하고 생성된 벡터를 가지고 태그들 간의 유사성을 체크하여 서로 다른 XML 문서들의 유사성을 수치적으로 계산한다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2005.07a
• /
• pp.103-105
• /
• 2005

최근 RFID에 대한 관심이 높아지고 있다. RFID 사용량도 증가하는 추세에 있으며, 앞으로는 생활 전반에서 RFID를 이용하게 될 것으로 전망한다. 그러나 사용자 프라이버시 보호 기법의 개발은 아직 해결해야 할 문제이다. 저가형 태그에는 기존 다른 시스템에서 사용되던 여러 가지 암호시스템의 적용이 어렵다. 그래서 많은 사람들이 RFID 태그에 적용 가능한 여러 가지 기법을 제시하였다. 그 중 Blocker 태그를 사용해서 프라이버시 보호와 범죄방지를 하는 기법이 있다. 그러나 Blocker 태그 기법에서는 쓰기 능력을 가지고 있는 태그에 적용 가능하다는 단점이 있다. 본 논문에서는 읽기만 가능한 저가형 태그에서도 Blocker 기능을 수행할 수 있는 새로운 기법을 제안하였다. 제안하는 기법은 현재 태그에서 최소한의 변경으로 프라이버시 보호와 범죄방지를 위한 실질적인 해결책으로 사용이 가능하다.

• Proceedings of the KIEE Conference
• /
• 1993.07a
• /
• pp.64-66
• /
• 1993

This paper presents an efficient method to calculate voltage collapse point and to improve static voltage stability. To evaluate static voltage stability in power systems. it is necessary to get critical loading points. For this purpose, we use linear programming to calculate efficiently voltage collapse point. And if index value becomes larger than given threshold value, vol tags stability is improved by compensation of reactive power at selected bus. This algorithm is verified by simulation on the sample system.

• Analytical Science and Technology
• /
• v.18 no.6
• /
• pp.460-468
• /
• 2005

The biotin-avidin complex, as a model recognition system, has been constructed through N-hydroxysuccinimide(NHS) reaction on a variety of substrates such as a smooth Au film, electrochemically roughened Au electrode and chemically modified mica. Stepwise self-assembled monolayers (SAMs) of biotin-avidin system were characterized by surface-enhanced resonance Raman scattering (SERRS) spectroscopy, atomic force microscopy (AFM) and surface plasmon resonance (SPR). A strong SERRS signal of rhodamine tags labeled in avidin from the SAMs on a roughened gold electrode indicated the successful complex formation of stepwise biotin-avidin recognition system. AFM images showed the circular shaped avidin aggregates (hexamer) with ca. $60{\AA}$ thick on the substrate, corresponding to one layer of avidin. The surface coverage and concentration of avidin molecules were estimated to be 90% and $7.5{\times}10^{-12}mol/cm^2$, respectively. SPR technique allowed one to monitor the surface reaction of the specific recognition with high sensitivity and precision.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.8 no.3
• /
• pp.1-10
• /
• 2012

Recently, Social Network services(SNS) is gaining popularity as Facebook and Twitter. Popularity of SNS leads to active service and social data is to be increased. Thus, social search is remarkable that provide more meaningful information to users. but previous studies using social network structure, network distance is calculated using only familiarity. It is familiar as distance on network, has been demonstrated through several experiments. If taking advantage of social context data that users are using SNS to produce, then familiarity will be helpful to evaluate further. In this paper, reflect user's attention through comments and tags, Facebook context is determined using familiarity between friends in SNS. Facebook context is advantageous finding a friend who has a similar propensity users in context of profiles and interests. As a result, we provide a blog post that interest with a close friend. We also assist in the retrieval facilities using Near Field Communication(NFC) technology. By the experiment, we show the proposed soicial search method is more effective than only tag.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2006.05a
• /
• pp.970-973
• /
• 2006

In this paper, this system implements a wireless parking lots management using RFID. Universal RFID Reader uses the software and specifies the class of UHF band. And then, it can recognize UHF band tags controlling the hardware. It can provide more efficient administration of physical distribution.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2010.05a
• /
• pp.589-590
• /
• 2010

All these images consist a considerable database. What's more, the semantic meanings of images are well presented by the surrounding text and links. But only a small minority of these images have precise assigned keyphrases, and manually assigning keyphrases to existing images is very laborious. Therefore it is highly desirable to automate the keyphrases extraction process. In this paper, we first introduce WWW image annotation methods, based on low level features, page tags, overall word frequency and local word frequency. Then we put forward our method of multi-cues integration image annotation. Also, show multi-cue image annotation method is more superior than other method through an experiment.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2010.05a
• /
• pp.905-908
• /
• 2010

Our purpose is to develope the system which detects splogs automatically among blogs on Web environment. After removing HTML of blogs, they are tagged by part of speech(POS) tagger. Words and their POS tags information is used as a feature type. Among features, we select useful features with $x^2$ statistics and train the SVM with the selected features. Our system acquired 90.5% of F1 measure with SPLOG data set.