• Annual Conference on Human and Language Technology
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• 2007.10a
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• pp.174-178
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• 2007

온톨로지 기반 분산 정보시스템 환경에서는 시스템들 간의 정보 공유을 위해 전문가에 의한 명시적 온톨로지 매핑(Explicit Mapping)을 통해 의미적 이질성(Semantic Heterogeneity)을 해결하고 있다. 하지만, 온톨로지 매핑의 고비용성 때문에 모든 정보시스템들 간의 매핑이 이루어지기 힘들다. 따라서, 본 논문에서는 이미 존재하는 온톨로지 매핑 정보들의 재사용을 통해 존재하지 않은 온톨로지 매핑 정보를 묵시적으로 예측하고자 한다. 본 논문에서는 이와 같은 분산 환경에서의 쿼리 전송을 통한 지식 검색에 있어서의 온톨로지 매핑을 기반으로 한 적절한 쿼리 변환 방법론을 소개하고자 한다.

• Publications of The Korean Astronomical Society
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• v.26 no.1
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• pp.37-44
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• 2011

We constructed a photometric database system which is optimally designed for microlensing events from KMTNet (Korea Microlensing Telescope Network) observation. We developed a framework software for the convenience of archiving, uploading, searching, and downloading of processed photometric data. From various tests for optimal data archiving engines, we found that the MyISAM storage engine shows the best performance. For the high performance of database system, data types of each field are carefully suggested from various combinations of tests especially to correct round-off errors. The developed framework provides the convenience of access to the database server using query forms via web pages, and displays the light curve of selected target for a quick view.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.1093-1094
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• 2015

Due to the use of the responsive web, representation of the web in a variety of devices is to be implemented in a more unified look. In this paper, we suggest how to implement fluid layout. We explain how to configure the fluid layout with the latest technology, flexible box and confirmed its advantages and disadvantages. In addition, we propose ways to solve the problem occurred by applying the flexible box.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.17-18
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• 2014

최근 모바일 기기의 보급 확산 및 관련 정보기술 발달로 건설현장에서의 모바일 서비스를 위한 사용자 요구사항이 점차 증가하고 있다. 이와 함께 공공기관에서 발주하는 도로 하천 공사를 관리하는 건설사업관리시스템 또한 모바일 서비스의 필요성이 대두 되었다. 이에 본 논문에서는 HTML5 및 jQuery를 이용한 모바일 앱을 설계하였다. 설계한 앱은 하이브라드 방식으로써 android 및 iOS 등 다른 기기와의 호환성을 유지하였다. 그리고 지도, GPS, 이미지(카메라) 및 전자서명 기능을 추가함으로써 본 시스템의 성능 향상 및 건설현장에서의 업무를 개선할 수 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06c
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• pp.39-41
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• 2012

센서 네트워크는 광범위한 지역에 분산된 센서 노드들로부터 환경 데이터를 수집하며, 이 데이터는 실생활의 다양한 애플리케이션에서 사용된다. 센서 네트워크에서의 데이터베이스는 전형적인 데이터베이스와 달리 시간적/공간적 질의를 효율적으로 처리할 수 있어야 한다. 그러나 기존의 센서 데이터베이스 연구에서는 특정 공간을 지정하기 위한 질의 언어 및 그 처리에 있어 한계점이 있다. 본 논문에서는 사용자 편의성을 증대시킨 공간지정 질의 및 처리 기법을 제시한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.451-453
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• 2014

기존의 자동차 블랙박스는 기록된 사고 기록 내용(사고영상 및 기타정보)은 내장된 메모리에만 기록 되고, 확인하기 위해서는 하드웨어를 자동차에서 탈착 후 PC에 연결하여 자동차 블랙박스 제조사에서 제공하는 사고확인 전용프로그램을 통해 사고 기록 내용을 확인한다. 만일 불의의 사고로 발생해 설치된 자동차 블랙박스가 고장 날 경우 당시 사고 기록 내용을 확인 할 수 없다. 본 논문은 기존의 자동차 블랙박스의 이런 불편한 사항을 해결하기 위해 사고가 발생하면 블랙박스가 즉시 인터넷을 이용해 서버로 업로드 하고, 웹브라우저로 업로드 된 사고기록을 확인 하는 프로세스에 대한 개발내용을 다룬다.

• Management & Information Systems Review
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• v.36 no.3
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• pp.131-150
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• 2017

The purpose of this study is to observe the spread pattern of open source software (OSS) while establishing relations with surrounding actors during its operation period. In order to investigate the change pattern of participants in the OSS, we use a netnography on the basis of online data, which can trace the change patterns of the OSS depending on the passage of time. For this, the cases of three OSSs (e.g. jQuery, MooTools, and YUI), which are JavaScript frameworks, were compared, and the corresponding data were collected from the open application programming interface (API) of GitHub as well as blog and web searches. This research utilizes the translation process of the actor-network theory to categorize the stages of the change patterns on the OSS translation process. In the project commencement stage, we identified the type of three different OSS-related actors and defined associated relationships among them. The period, when a master commences a project at first, is refined through the course for the maintenance of source codes with persons concerned (i.e. project growth stage). Thereafter, the period when the users have gone through the observation and learning period by being exposed to promotion activities and codes usage respectively, and becoming to active participants, is regarded as the 'leap of participants' stage. Our results emphasize the importance of promotion processes in participants' selection of the OSS for participation and confirm the crowding-out effect that the rapid speed of OSS development retarded the emergence of participants.

• Journal of the Korean Association of Geographic Information Studies
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• v.19 no.3
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• pp.16-28
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• 2016

Advancing geo-spatial web technologies and their applications require compatible and interoperable heterogeneous browsers and platforms. Reduction of common or supporting components for web-based system development is also necessary. If properly understood and applied, OGC-based standards can be utilized as effective solutions for these problems. Thus, OGC standards are central to the design and development of web-based geo-spatial systems, and are particularly applicable to web services, which contain data processing modules. However, the application for OGC WPS 2.0 is at an early stage as compared with other OGC standards; thus, this study describes a test implementation of a web-based geo-spatial processing system with OGC WPS 2.0 focused on asynchronous processing functionality. While a binary thresholding algorithm was tested in this system, further experiments with other processing modules can be performed on requests for many types of processing from multiple users. The client system of the implemented product was based on open sources such as jQuery and OpenLayers, and server-side running on Spring framework also used various types of open sources such as ZOO project, and GeoServer. The results of geo-spatial image processing by this system implies further applicability and extensibility of OGC WPS 2.0 on user interfaces for practical applications.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.277-280
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• 2015

Smishing, Phishing personal privacy caused by Incident accidents such as Phishing information security has become a hot topic. Such incidents have privacy in personal information management occurs due to a lack of user awareness. This paper is based on the existing structure of the XML Tag question bank used a different Key-Value Structure-based JSON. JSON is an advantage that does not depend on the language in the text-based interchange format. The proposed system is divided into information security sector High, Middle and Low grade. and Provides service to the user through the free space and the smart device and the PC to the constraints of time. The use of open source Apache Load Balancing technology for reliable service. It also handles the user's web page without any training sessions Require server verification result of the training(training server). The result is sent to the training server using jQuery Ajax. and The resulting data are stored in the database based on the user ID. Also to be used as a training statistical indicators. In this paper, we design a level training system to enhance the user's information security awareness.

• The KIPS Transactions:PartD
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• v.9D no.2
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• pp.173-184
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• 2002

This paper discuss an index-based subsequence matching that supports time warping in large sequence databases. Time warping enables finding sequences with similar patterns even when they are of different lengths. In earlier work, Kim et al. suggested an efficient method for whole matching under time warping. This method constructs a multidimensional index on a set of feature vectors, which are invariant to time warping, from data sequences. For filtering at feature space, it also applies a lower-bound function, which consistently underestimates the time warping distance as well as satisfies the triangular inequality. In this paper, we incorporate the prefix-querying approach based on sliding windows into the earlier approach. For indexing, we extract a feature vector from every subsequence inside a sliding window and construct a multidimensional index using a feature vector as indexing attributes. For query processing, we perform a series of index searches using the feature vectors of qualifying query prefixes. Our approach provides effective and scalable subsequence matching even with a large volume of a database. We also prove that our approach does not incur false dismissal. To verify the superiority of our approach, we perform extensive experiments. The results reveal that our approach achieves significant speedup with real-world S&P 500 stock data and with very large synthetic data.