• 한국디지털정책학회:학술대회논문집
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• 2004.11a
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• pp.185-202
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• 2004

Recent development in wireless computing and GPS technology cause the active development in the application system of location information in real-time environment such as transportation vehicle management, air traffic control and location based system. Especially, study about vehicle location tracking system, which monitors the vehicle's position in a control center, is appeared to be a representative application system. However, the current vehicle location tracking system can not provide vehicle position information that is not stored in a database at a specific time to users. We designed a vehicle location tracking system that could track vehicle location using mobile interface such as PDA. The proposed system consist of a vehicle location retrieving server and a mobile interface. It is provide not only the moving vehicle's current location but also the position at a past and future time which is not stored in database for users.

• Korean Journal of Computational Design and Engineering
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• v.8 no.1
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• pp.48-54
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• 2003

In a design-to-manufacturing environment, the product data is shared by various CAD/CAM/CAE systems with little integration or substantial data redundancy. The main purpose of this paper is to build a database containing all the features required for STEP-NC machining and to show how a STEP-NC repository can support the complete process for machining. A STEP-NC database schema has been constructed and several query functions have been built for the purpose of implementing the retrieving system of a STEP-NC database. The EXPRESS data model of ISO 14649 has been mapped to the database data definition language of the Oracle database. To apply the STEP-NC database to an industry example, the ISO 14649 part program has been stored into the STEP-NC database. To implement example scenarios, the sample query interface has been built.

• Phonetics and Speech Sciences
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• v.6 no.1
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• pp.119-125
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• 2014

Many studies have reported an age-related decline in the ability to spell words correctly. The aim of this study was to investigate the deterioration on retrieving orthographic knowledge in 64 normal elderly Korean persons. The subjects were 64 in total: they were composed of 22 persons in their 50s, 20 persons in their 60s, and 22 persons in their 70s or older. We instructed them to write from a dictation of 60 words stimuli (20 regular words, 20 irregular words, 20 nonwords). Older adults made more errors than younger adults, and the age-related decline in performance was greater for irregular than regular and nonwords. With respect to the error pattern in the irregular words, the subjects showed more phonological plausible errors than phonological implausible errors. The number of self-correction was high in nonwords. Based on the results, we found that aging differentially affects the retrieval of orthographic knowledge on regular, irregular and nonwords.

• Proceedings of the KSRS Conference
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• 2005.10a
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• pp.785-788
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• 2005

We design as well as implement MRTG++ enhanced by eliminating drawbacks of original MRTG. Existing MRTG makes it easy to monitor network resources on the web, and it can show some trend utilization about resources of remote systems. However MRTG has only functions showing statistical information data with daily/monthly/yearly characteristics in real-time, and periodically deletes stored data. Thus we improve log file-based storing method as an effectivelly storing method with database, propose expended MRTG++ retrieving as well as managing with measured data. It also can be applied in ubiquitous environment.

• Journal of Institute of Control, Robotics and Systems
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• v.11 no.12
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• pp.1083-1087
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• 2005

As development of digital technology, many kinds of multimedia data are used variously and requirements for effective use by user are increasing. In order to transfer information fast and precisely what user wants, effective retrieval method is required. As existing multimedia data are impossible to apply the MPEG-1, MPEG-2 and MPEG-4 technologies which are aimed at compression, store and transmission. So MPEG-7 is introduced as a new technology for effective management and retrieval of multimedia data. In this paper, we extract content-based features using color descriptor among the MPEG-7 standardization visual descriptor, and reduce feature data applying PCA(Principal Components Analysis) technique. We model the cerebral cortex and hippocampal neural network in engineering domain, and team content-based feature vectors fast and apply the hippocampal neural network algorithm to compose of optimized feature. And then we present fast and precise retrieval effect when indexing and retrieving.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.9
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• pp.3458-3464
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• 2010

Due to the recent tremendous growth of internet information, RSS, syndication technology provides internet users with a user-friendly information search. RSS enables you to automatically receive newly updated contents, so users do not need to constantly access web sites to obtain new information. This paper proposes the way of managing the web crawler, which collects the sites of RSS documents and helps the users efficiently use the RSS documents. And it also suggests the proper way of ranking the RSS documents based on the users' popularity. Users can efficiently search out the documents they need by using the proposed information searching methods.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.676-678
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• 2002

In this work, we present the novel scheduling algorithm of the multimedia data retrieval for the mobile disk drive. Our algorithm is focused on minimizing the power consumption involved in data retrieval from the local disk drive. The prime commodity in mobile devices is the electricity. Strict restriction on power consumption requirement of the mobile device put unique demand in designing of its hardware and software components. State of the art disk based storage subsystem becomes small enough to be embedded in handhold devices. It delivers abundant storage capacity and portability. However, it is never be trivial to integrate small hard disk or optical disk drive in handhold devices due to its excessive power consumption. Our algorithm ARM in this article generates the optimal schedule of retrieving data blocks from the mobile disk drive while guaranteeing continuous playback of multimedia data.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.6
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• pp.831-837
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• 2013

MEMS accelerometer provides a low cost alternative in retrieving the acceleration signal for motion sensing. Theoretically, displacement can be calculated by double integrate the acceleration signal. However, in practical, it could not be done in straight forward manner due to several factors that exist in the real world. This experiment focuses on the processes from practical accelerometer signal acquisition till the result of double integration for low frequency vertical motion.

• The Journal of Information Technology
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• v.8 no.2
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• pp.17-26
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• 2005

RFID(Radio Frequency IDentification) is a method of remotely storing and retrieving data using devices called 'RFID tags'. An RFID tag is a small object, such as an adhesive sticker, that can be attached to or incorporated into a product. RFID tags contain antennas to enable them to receive and respond to radio-frequency queries fro an RFID transceiver. Eventually, RFID SYSTEM is very interesting to watch people live linger than they used to before. Some of reasons for that phenomenon is the improving medical studies. As we live healthier and get to know more about our body, we can extend our lives. This Platform is Physical Health Promotion Service, Home Health Monitoring Service, Mental Health Promotion Service, Home Patient Management Service, Chronic Disease Management Service, Emergency Patient Management Service, Medical Information and Consulting Service of the RFID.

• Proceedings of the KIEE Conference
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• 2008.11a
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• pp.299-301
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• 2008

For an efficient operation of today's power system, power engineers are required to analyze enormous amount of data. Owing to the development of technology, a variety of power systems computational tools have been developed and commercialized. However, the practical use of computational tools not only requires that people be able to understand the results the tools produce but also extract the required information from the simulation results which generally involves massive amount of information. This paper introduces a novel interface that would complement the drawbacks in the visualization of data of the pre-existing tools and assist the user in readily retrieving the required information, in this case the rotor angle data, of the simulated system thereby making power system analysis more feasible to be effectuated.