• Journal of the Korean Association of Geographic Information Studies
• /
• v.8 no.3
• /
• pp.34-43
• /
• 2005

We will catch the spatio-temporal changes that analyse the unknown topography of Go-Gunsan Islands using Landsat TM satellite images into an unsupervised ISODATA classification and a supervised nearest likelihood classification. Each sedimental topography has the different characteristics according to building the Saemangeum embarkment. We will deal with the distribution of sedimental shapes using ERDAS Imagine 8. 6. The result that classifies specifically topographic properties of our research area be considered to get use of establishing the reclaiming program and predicating the reclaimed sedimental topography. The research area can be classified into tidal flats and sea level using band 4 among 7 bands of Landsat TM. Also band 5 can be used to classify the special unknown shapes of tidal flats. We will clarify the efficiency that spatio-temporal sedimental changes can be extracted through processing satellite images. Therefore, the spatio-temporal unknown topography change monitoring using satellite images is expected to be very useful to clarify whether the tidal flat is generated or not in the Go-Gunsan Islands at the outer side of the embarkment after constructing completely the Saemangeum tidal embarkment.

• The Transactions of the Korea Information Processing Society
• /
• v.6 no.9
• /
• pp.2431-2441
• /
• 1999

Equations are widely used in representing information. One of the basic questions about equations is to determine whether a given equation follows logically from the set of equations. Rewrite systems are one of the method to answer many instances of this problem. A rewrite system simplifies a given term by applying rewrite rules successively. Hence it is important that the process of simplification does not go on indefinitely. One of the methods to check whether a rewrite system terminates (that is, the rewrite system does not go on indefinitely) is polynomial orderings. A polynomial ordering assigns an appropriate polynomial to each function symbol. However, how to assign polynomials to function symbols is not known. We propose an automatic way of generating polynomial orderings using genetic algorithms.

• Journal of Korea Multimedia Society
• /
• v.24 no.2
• /
• pp.199-207
• /
• 2021

It is very important to support real-time on the inspection equipment based on Windows. In particular, in the system using MIL-STD-1553B communication, which is widely used in military weapon systems, real-time is required for inspection equipment that uses mostly platforms based on Windows such as Industrial PCs. However, in order to use a complete real-time operating system such as VxWorks, the purchase cost is expensive and the implementation is complicated on the system, so it is not suitable for inspection equipment that requires simple functions to just check go or no-go. Therefore, in this paper, a Real-Time implanted Kernel(RTiK) in the Windows kernel is implanted in order to improve these defects, and real-time performance is implemented for periodically MIL-STD-1553B communication by Deferred Procedure Call(DPC) of Windows. Also, it was verified that the period of up to 2ms was guaranteed with a RDTSC into the EDX:EAX registers for measuring the periodicity.

• The Journal of the Convergence on Culture Technology
• /
• v.2 no.4
• /
• pp.49-54
• /
• 2016

Development of AR/VR has expanded computer games from indoor static contents to outdoor dynamic contents. The syndrome of 'Pokemon Go' which is a representative AR game was born, and Nintendo's stock price shot up a massive 120%. Although some people gained profits, new damages are emerging including illegal intrusion or road accidents because it is a type of game to visit real locations. There are reported about 114 thousand road accidents related to the game. This study aims to examine the trends of AR game in 2016 and analyze damages and positive cases to suggest a method for preventing accidents due to the AR game, and a business model.

• Journal of the Society of Naval Architects of Korea
• /
• v.45 no.6
• /
• pp.590-600
• /
• 2008

This paper concerns the development of a designer friendly hull form parameterization and its coupling with advanced global optimization algorithms. As optimization algorithms, we choose the Partial Swarm Optimization(PSO) recently introduced to solve global optimization problems. Most general-purpose optimization softwares used in industrial applications use gradient-based algorithms, mainly due to their convergence properties and computational efficiency when a relatively few number of variables are considered. However, local optimizers have difficulties with local minima and non-connected feasible regions. Because of the increase of computer power and of the development of efficient Global Optimization (GO) methods, in recent years nongradient-based algorithms have attracted much attention. Furthermore, GO methods provide several advantages over local approaches. In the paper, the derivative-based SQP and the GO approach PSO are compared with their relative performances in solving some typical ship design optimization problem focusing on their effectiveness and efficiency.

• Proceedings of the IEEK Conference
• /
• 2005.11a
• /
• pp.1097-1100
• /
• 2005

멀티미디어 데이터의 생성 및 분배가 폭발적으로 증가함에 따라 산재된 메타데이터에 대한 효율적인 검색이 필요하게 되었다. 내용기반의 효율적인 검색을 지원하기 위해 MPEG-7의 표준이 제정되면서 내용기반 영상의 검색의 관심이 높아지고 있다. 본 논문에서는 이 조건들을 해결하기 위해 MPEG-7 디스크립터와 자체 개발한 Compact 디스크립터를 이용하여 Web 기반으로 검색 시스템을 구현하고 바이오 이미지를 위한 디스크립터의 조합을 제공한다. 이미지의 feature 추출 인터페이스와 검색 인터페이스를 웹 어플리케이션으로 구현해 웹 브라우저만으로 이미지의 효율적인 저장, 검색 및 관리를 할 수 있고 XML 형태로 표현된 feature 를 다양한 용도로 확장 할 수 있다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2016.07a
• /
• pp.95-96
• /
• 2016

본 논문에서는 디리클레 분포와 베이즈 추론 모델을 활용하여 전자우편을 분류하고 정리하는 방법을 제안한다. 과거 원치 않는 광고성 이메일인 스팸 탐지에서 시작한 전자우편 분류는 지속적인 송수신 량의 증가와 내용의 다양화로 인해 광고성과 정보성의 판단 기준이 모호해진 상태이다. 스팸 탐지와 같은 이분법적 분류 방식이 아닌 내용의 주제 별로 자동 분류할 수 있는 방법이 필요하다. 본 논문에서 다루는 제안 기법은 전자우편의 내용에서 다뤄질 수 있는 주제의 종류를 예측하기 위한 방법을 제공한다. 발신하거나 수신된 전자우편이 속한 주제를 자동으로 정할 수 있다. 본 제안 기법의 활용을 통해 전자우편의 분류만이 아닌 업무 및 시장 동향 분석과 정보보안 분야에서는 악성코드 분류에 사용될 수 있을 것으로 기대된다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2016.07a
• /
• pp.89-90
• /
• 2016

본 논문에서는 라디오와 텔레비전을 대상으로 이루어진 전파납치 사건이 오늘날 사물인터넷 시대에서 가지는 의미를 연구한다. 인터넷에 연결되는 사물이 다양해지고 활용 분야가 넓어질수록 사물에 가해지는 네트워크에 의한 공격에서 기기의 안전성과 신뢰성을 보장하기 어렵다. 인터넷이 연결되는 사물일지라도 해당 사물이 이전부터 인터넷과는 다른 통신 기능을 가지고 있는 경우 기존의 통신 규격을 그대로 계승받는다. 이전의 통신 방식은 일반 라디오 및 텔레비전의 통신과 유사한 방법이 많아 전파교란 및 납치의 영향을 받을 수 있다. 이러한 위협에 대응하기 위해 전파납치 사례를 분석하고 사물의 제어에 영향을 미칠 가능성을 연구하여 대응한다.

• Journal of the Korean Society for Library and Information Science
• /
• v.19
• /
• pp.151-188
• /
• 1990

The aims of automation efforts in libraries are the rationalization of interval work and improvement of user services. After a period of exclusive internal computer utilization, later voluntary contact with the computer (e.g., circulation control with self services), patrons of American libraries now have to go to a computer terminal if they want certain information. Online public access catalogs(OPAC) have been used in American libraries since the end of the seventies. But OP AC are accepted by patron only if they have a useful and flexible user interface. This paper briefly describes the use of online catalogs in different type of libraries, categories of user (user, non-user), aspect of catalog use in context with computer experience etc. The disscussion then focuses on the characteristics of the final report of online catalog use study of Council on Library Resources and user problems in searching, as reported in many other catalog use studies.

• ETRI Journal
• /
• v.31 no.3
• /
• pp.333-335
• /
• 2009

To match the requirements of heterogeneous mobile devices, video objects may be transcoded, which requires considerable CPU resources. Alternatively, multiple versions of the same video may be stored on servers, but this requires a lot of disk space. We formulate the trade-off between the versions that are stored on disk and the need for transcoding. We propose an optimal solution to this formulation based on dynamic programming. Experiments show that our scheme allows up to 68% more clients to be admitted than conventional schemes when a reasonable amount of storage is available.