• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2006.04a
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• pp.155-161
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• 2006

These days, ubiquitous and RFID are often mentioned by mass media. This piper will introduce RFID-aided Baggage Tracking System that has been implemented under a government project, identify areas for improvement based on the up-to-date operation, and finally a research and development approach to address the issues. The document will also discuss mobile RFID R&D business that our research center is carrying out, and suggest technical requirements for successful RFID business from perspective of corporate research center. Last but not least it will talk about some opportunities that require cooperation among the govement, business and academy to ensure the relevant industry advances RFID business in Korea.

• The Korean Journal of Applied Statistics
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• v.22 no.4
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• pp.687-695
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• 2009

The Bayesian multiple change-point estimation has been applied to the daily means of ozone and PM10 data in Seoul for the period 1999. We focus on the detection of multiple change-points in the ozone and PM10 bivariate vectors by evaluating the posterior probabilities and Bayesian information criterion(BIC) using the stochastic approximation Monte Carlo(SAMC) algorithm. The result gives 5 change-points of mean vectors of ozone and PM10, which are related with the seasonal characteristics.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.14 no.3
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• pp.43-49
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• 2015

This paper describes the design of a forged fitting form to acquire a method of product design measurement by target measurement standards. The pipefitting connects each pipe and combines seals and nipples with the pipes normally. Therefore, the section combined with the fitting pipe was measured by a 3D scanner, and the acquired measurement and the design measurement were obtained after modification of the forged fitting pipe by that standard. Moreover, the accuracy of the model was verified through leakage testing of the oil and verification of the design measurement for accuracy decisions on the design measurement after modification of the product.

• Communications for Statistical Applications and Methods
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• v.16 no.4
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• pp.659-667
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• 2009

Recently Song and Cheon (2006) and Cheon and Lim (2009) developed the generalized maximum entropy(GME) estimator to solve ill-posed problems for the regression coefficients in the simple panel model. The models discussed consider the individual and a spatial autoregressive disturbance effects. However, in many application in economics the data may contain nested groupings. This paper considers a two-way error component model with nested groupings for the ill-posed data and proposes the GME estimator of the unknown parameters. The performance of this estimator is compared with the existing methods on the simulated dataset. The results indicate that the GME method performs the best in estimating the unknown parameters in terms of its quality when the data are ill-posed.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.4
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• pp.721-726
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• 2017

We fabricated stretchable thin-film transistors(TFTs) on a polydimethylsiloxane substrate with patterned polyimide island structures by using an amorphous InGaZnO semiconductor and parylene gate insulator. The TFTs exhibited a field- effect mobility of $5cm^2V^{-1}s^{-1}$ and a current on/off ratio of $10^5$ at a relatively low operating voltage. Furthermore, the fabricated transistors showed no noticeable changes in their electrical performance for large strains of up to 50 %.

• The Korean Journal of Applied Statistics
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• v.22 no.3
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• pp.627-634
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• 2009

Recently, the general contour Monte Carlo has been proposed by Liang (2004) as a space annealing version(ACMC) for optimization problems. The algorithm can be applied successfully to determine the ground configurations for the prediction of protein folding. In this approach, we use the distances between the consecutive $C_{\alpha}$ atoms along the peptide chain and the mapping sequences between the 20-letter amino acids and a coarse-grained three-letter code. The algorithm was tested on the real proteins. The comparison showed that the algorithm made a significant improvement over the simulated annealing(SA) and the Metropolis Monte Carlo method in determining the ground configurations.

• Journal of the Korean Society for Library and Information Science
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• v.28
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• pp.193-245
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• 1995

New curriculum for information and library science is proposed on the notion of the internship and scholarly characteristics. The future of the information and library science is expected as the discipline to synthesize the natural science and the social science. Especially the internship is strongly suggested as the post graduate program. To draw the conclusion. the history of the information and library science and its educational background are analyzed. The states of the historical developments of the information and library science are explained in terms of philosophy. The functional and scholarly environments of the information and library science are also investigated. Secondarily it concludes that the curriculum development for information and library science is not aimed on the skills but on the phenomena.

• Bulletin of the Korean Chemical Society
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• v.28 no.9
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• pp.1493-1498
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• 2007

In this work, alkyl methacrylate-based microgels were synthesized by an experimental design method, and their sebum absorption characteristics were investigated. The results of fractional factorial experimentation indicated that the cross-linking agent content, solvent content, and stirring speed were the main parameters in the synthesis of the microgels. The suitable synthesis conditions were determined by the response surface design method. Through a study of the monomer and solvent effects, it was confirmed that the microgel shows the highest sebum absorption ratio when t-butyl methacrylate is used as a monomer or when acetone is used as a solvent. The optimal microgel synthesis conditions for cosmetic application were determined, and the resulting microgel had a mean particle size of 4.7 μm and a sebum absorption ratio of 435%.

• Annual Conference of KIPS
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• 2017.11a
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• pp.403-406
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• 2017

지오펜스와 하이브리드 비콘을 이용한 입원환자 출입관리시스템은 모바일 앱, 관리자는 웹 화면을 이용해 입원 환자들의 병원 출입을 관리하는 시스템이다. 기존의 외출 시스템은 환자가 외출 신청서를 수기로 작성하고 주치의의 허락 하에 외출하는 형태이지만, 신청서 작성 과정을 거치지 않고 무단으로 외출하는 환자의 경우 외출 시점이나 현재 위치 등을 파악하기 어려운 문제가 있다. 무단 외출 환자를 즉각적으로 파악하지 못하는 경우 해당 환자들이 음주 또는 귀원하지 않는 등의 사고의 원인이 되는 문제가 발생할 수 있다. 본 논문에서는 지오펜스와 하이브리드 비콘을 이용해 환자들의 병원 출입 유무의 정확성을 높이고 무단 외출 환자를 즉각적으로 파악하는 방안을 제시한다.

• Annual Conference of KIPS
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• 2017.11a
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• pp.671-674
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• 2017

고객 상담 채팅은 비동기 상태에서도 메시지를 보낼 수 있기 때문에 고객이 메시지를 보낸 후 한참 후에 메시지를 읽고 답을 보내는 경우가 많아 하나의 고객 문의를 처리하는데 시간이 많이 소요된다. 이런 문제점을 해결하기 위해서 본 논문에서는 룰 엔진 기반의 챗봇 IFTTT 서비스 시스템을 제안한다. 이를 통하여 고객 상담 업무를 자동적으로 실시간 처리 할 수 있다.