• Journal of KIISE:Databases
• /
• v.37 no.5
• /
• pp.221-227
• /
• 2010

Web access sequence mining can discover the frequently accessed web pages pursued by users. Utility-based web access sequence mining handles non-binary occurrences of web pages and extracts more useful knowledge from web logs. However, the existing utility-based web access sequence mining approach considers web access sequences from the very beginning of web logs and therefore it is not suitable for mining data streams where the volume of data is huge and unbounded. At the same time, it cannot find the recent change of knowledge in data streams adaptively. The existing approach has many other limitations such as considering only forward references of web access sequences, suffers in the level-wise candidate generation-and-test methodology, needs several database scans, etc. In this paper, we propose a new approach for high utility web access sequence mining over data streams with a sliding window method. Our approach can not only handle large-scale data but also efficiently discover the recently generated information from data streams. Moreover, it can solve the other limitations of the existing algorithm over data streams. Extensive performance analyses show that our approach is very efficient and outperforms the existing algorithm.

• BMB Reports
• /
• v.45 no.1
• /
• pp.47-50
• /
• 2012

The International HapMap Project and the Human Genome Diversity Project (HGDP) provide plentiful resources on human genome information to the public. However, this kind of information is limited because of the small sample size in both databases. A Genome-Wide Association Study has been conducted with 8,842 Korean subjects as a part of the Korea Association Resource (KARE) project. In an effort to build a publicly available browsing system for genome data resulted from large scale KARE GWAS, we developed the KARE browser. This browser provides users with a large amount of single nucleotide polymorphisms (SNPs) information comprising 1.5 million SNPs from population-based cohorts of 8,842 samples. KAREBrowser was based on the generic genome browser (GBrowse), a web-based application tool developed for users to navigate and visualize the genomic features and annotations in an interactive manner. All SNP information and related functions are available at the web site http://ksnp.cdc. go.kr/karebrowser/.

• Proceedings of the Korea Society of Information Technology Applications Conference
• /
• 2005.11a
• /
• pp.207-210
• /
• 2005

Ubiquitous computing is one of the key technology areas in the "Project on Development of Ubiquitous computing and network technology" promoted by the Ministry of Science and Technology as a frontier business of the $21^{st}$ century in Korea, which is based on the new concept merging physical space and computer-based cyber space. With recent advances in Micro Electro Mechanical System (MEMS) technology, low cost and low-power consumption wireless micro sensor nodes have been available. Using these smart sensor nodes, there are many activities to monitor real world, for example, habitat monitoring, earthquake monitoring and so on. In this paper, we introduce web-based real environment monitoring system incorporating wireless sensor nodes. It collects sensing data produced by some wireless sensor nodes and stores them into a database system to analyze. Our environment monitoring system is composed of a networked camera and environmental sensor nodes, which are called Mica2 and developed by University of California at Berkeley. We have modified and ported network protocols over TinyOS and developed a monitoring application program using the MTS310 and MTS420 sensors that are able to observe temperature, relative humidity, light and accelerator. The sensed data can be accessed user-friendly because our environment monitoring system supports web-based user interface. Moreover, in this system, we can setup threshold values so the system supports a function to inform some anomalous events to administrators. Especially, the system shows two useful pre-processed data as a kind of practical uses: a discomfort index and a septicity index. To make both index values, the system restores related data from the database system and calculates them according to each equation relatively. We can do enormous works using wireless sensor technologies, but just environment monitoring. In this paper, we show just one of the plentiful applications using sensor technologies.

• Proceedings of the Korea Database Society Conference
• /
• 1999.06a
• /
• pp.227-239
• /
• 1999

본 연구에서는 부서간 갈등을 해결하기 위한 새로운 방법론으로서 웹 기반 협상지원시스템 (Web-based Negotiation Support System: Web NSS)을 제안한다. 기업의 경영활동에 있어서 각 부서간에는 여러 가지 이유로 인해 갈등이 존재한다. 대표적으로 생산부서와 마케팅 부서간에는 갈등이 항상 존재하기 마련이다. 예를 들어, 마케팅 부서에서는 수시로 변하는 고객들의 요구사항에 맞추기 위해서 제품라인을 확대하여 다양한 제품들을 생산하고, 그에 따른 높은 판매실적을 원한다. 그러나, 생산부서에서는 이와는 달리 적은 종류의 제품을 가능한한 한정적으로 생산하여 제품에 들어가는 원가를 절감하고 그에 따라서 생산실적을 높이려고 한다. 이 같은 유형의 부서간 갈등은 결과적으로 기업의 전체적인 성과를 저해시키는 요인으로 작용한다. 또한, 최근 대부분의 기업은 각각의 부서별 기능을 분산형태로 운영하고 있어서 관련부서가 지리적으로 멀리 떨어져 있게 되어 새로운 의사결정통합 지원시스템이 절실히 요구된다 본 연구에서는 이러한 상황에 적합한 새로운 유형의 갈등관리 메커니즘으로서 웹 기반 협상지원시스템을 제안한다. 본 시스템은 생산부서와 마케팅부서간의 갈등을 해결하고 이를 협상의 형태로 지원하기 위한 웹 기반 의사결정지원시스템이다. 본 연구에서는 실험과정을 통하여 제안하는 의사결정지원시스템의 성과를 증명하였다.

• IE interfaces
• /
• v.13 no.3
• /
• pp.539-547
• /
• 2000

An architecture of a Web-based Decision Support system for mathematical analysis is presented. Front-end modules provide web-client GUI environment for mathematical analysis. The networking architecture is built upon client/server system by Java socket and accesses database by JDBC in WWW. Back-end modules provide decision supporting service and data management for mathematical programming analysis. In the back-end any analysis tools, such as mathematical optimizer, simulation package, or statistics package can be used. As an application example for this implementation, optimal facility replacement decision problem is selected. In the implementation the optimal facility replacement decision problem is formulated as a shortest path problem. It uses Oracle DB and CPLEX package as the mathematical optimizer. While ORAWeb is designed and implemented on the optimal facility replacement problem, it can easily be extended to any decision supporting problems that would require mathematical optimization process.

• Journal of Internet Computing and Services
• /
• v.2 no.5
• /
• pp.9-19
• /
• 2001

In this paper. we develop associate knowledge extraction method for finding and expanding user preference knowledge automatically from web document database. To reflect user interest or preferences, agent explores and extracts relevant information to central term involving the intent of users from the example documents. To do so, we apply association rule exploration data-mining method to the extraction of the relevant objects in the web documents. Also, to give the weighted-value to the extracted and relevant information, we present associate tag block-based weighting method. We applied to bioinformatics above associate knowledge extraction method to find related keywords.

• 제어로봇시스템학회:학술대회논문집
• /
• 2005.06a
• /
• pp.714-719
• /
• 2005

In this paper, the informative space is proposed to implant ubiquitous functions into physical spaces. We merge physical and virtual spaces through the space structurization using an RFID system, and solve the space localization and mapping problem for a robot to navigate through the distribution and synthesis of information and knowledge. To distribute knowledge flexibly and reliably to changing environment and also to develop a system which allows a robot to invoke and merge the distributed knowledge more freely, we employ a novel approach of knowledge management based on Web services. The proposed method is verified by building a physical space with two kinds of RFID tags and a virtual space with knowledge database based on Web services.

• Journal of the Korean Institute of Rural Architecture
• /
• v.8 no.1
• /
• pp.43-51
• /
• 2006

Architectural design works are proceeded by the collaboration of experts working in many fields, but the traditional method of collaboration, so to speak offline collaboration, has limitation on time and space. The meeting agenda is not well organized in the meeting. Often there are so many items to discuss, that some get left out, and remain unaddressed. The knowledge relying on people's memory is not always accurate. To solve the above problems, we would like to suggest web-based collaboration system in architectural design and provide contents which are called checklists and knowledge database for collaboration.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2002.10a
• /
• pp.938-941
• /
• 2002

Small and medium enterprises have various problems that is the distributed process state, the method of receipt from custom, documentation change and so on related to the existing product design process. For that reason they require systematic analysis and smooth progress f3r each product design process. The solution is in this issue development of design management system far collaborative engineering. The aim of this system is to analyze the wrong existing process and to standardize product design process. Since this system is a server on web based Database with web identification, the client can overcome the limit of time, place and resource duplication. As a result product design process gets the greatest of efficiency in the various aspects.

• Korean Journal of Remote Sensing
• /
• v.19 no.1
• /
• pp.71-80
• /
• 2003

In this Paper, we Propose web-based Media GIS architecture using 3D geographical database and GPS-related data resulted from 45-Van. We introduce a novel interoperable geographical data service concept; so-called, Virtual World Mapping (VWM) that can map 3D graphic world with real-world video. Our proposed method can easily retrieve geographical information and attributes to reconstruct 3D virtual space according to certain frame in video sequences. Our proposed system architecture also has an advantage that can provide geographical information service with video stream without any image processing procedures. In addition to, describing the details of our components, we present a Media GIS web service system by using GeoVideoServer, which performs VWM technique.