• 지능정보연구
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• 제6권1호
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• pp.35-50
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• 2000

Diverse requirements of users on web-based model management force a system agent to develop user-adaptive building a model in reality and providing an adequate solution method of the model. The relationship between models is important knowledge for the agent to effectively build a new model to adaptively adjust an existing model under a problem and to efficiently connect the new model into an adequate solution method. Since the generating process of the inter-model relationship is more difficult than the building a new model however the process mostly depends on the knowledge of operation research experts. Without the adequate scheme of the inter-model relationship the burden of the management for the agent increases rapidly and the quality of the services may worsen. This study shows that meta-knowledge generated from relationship between models is important for the user to build a model in reality and to acquire the solver appropriate to the model. The relationship that consists of common and exclusive objects between models can be represented by frames. The system under development to implement the idea includes user-adaptive ability which identifies a model through forward chaining method and searches the solver appropriate to the model by using the meta knowledge. We illustrate the meta knowledge with an applied delivery system in supply chain management.

• 한국IT서비스학회지
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• 제13권2호
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• pp.133-149
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• 2014

It is unavoidable to provide products that meet customers' needs and wants so that firms may survive under the competition in this globalized market. This paper focuses on how to provide levels for attributes that compse product so that firms may give the best products to customers. In particular, its main issue is how to determine common attributes and the others with their appropriate levels to maximize firms' profits, and how to construct a decision support system to ease decision makers' decisons about optimal common attribute selection using the Semantic Web and SWCL technologies. Parameter data in problems and the relationships in the data are expressed in an ontology data model and a set of constraints by using the Semantic Web and SWCL technologies. They generate a quantitative decision making model through the automatic process in the proposed system, which is fed into the solver using the Logic-based Benders Decomposition method to obtain an optimal solution. The system finally provides the generated solution to the decision makers. This presentation suggests the opportunity of the integration of the proposed system with the broader structured data network and other decision making tools because of the easy data shareness, the standardized data structure and the ease of machine processing in the Semantic Web technology.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권5호
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• pp.836-858
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• 2010

Web Services allow a user to integrate applications from different platforms and languages. Since mobile applications often run on heterogeneous platforms and conditions, Web Service becomes a popular solution for integrating with server applications. However, because of its verbosity, XML based SOAP messaging gives the possible overhead to the less powerful mobile devices. Based on the mobile client's behavior that it usually exchanges messages with Web Service continuously in a session, we design the Handheld Flexible Representation architecture. Our proposed architecture consists of three main components: optimizing message representation by using a data format language (Simple_DFDL), streaming communication channel to reduce latency and the Context-store to store context information of a session as well as redundant parts of the messages. In this paper, we focus on the Context-store and describe the architecture with the Context-store for improving the performance of mobile Web Service messaging. We verify our approach by conducting various evaluations and investigate the performance and scalability of the proposed architecture. The empirical results show that we save 40% of transit time between a client and a service by reducing the message size. In contrast to solutions for a single problem such as the compression or binarization, our architecture addresses the problem at a system level. Thus, by using the Context-store, we expect reliable recovery from the fault condition and enhancing interoperability as well as improving the messaging performance.

• 한국컴퓨터정보학회논문지
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• 제16권1호
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• pp.125-132
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• 2011

웹 기반 공격에 대한 대응책으로 계층적 웹 보안 시스템이 있지만 다양한 혼합 및 우회 공격에는 제대로 대응하지 못하는 실정이다. 본 논문은 웹 공격에 의해 발생하는 악성코드 유포, XSS, 웹쉘 생성, URL Spoofing, 개인 정보유출 등의 증상을 HTTP outbound traffic의 감시를 통해 실시간으로 탐지하는 효율적인 기법을 제안한다. 제안 기법은 다양한 웹 공격에 의해 생성되는 HTML 태그와 Javascript 코드를 분석하여 설정한 시그너처를 outbound traffic과 비교 검색하여 웹 공격을 탐지한다. 실제 침입 환경에서의 검증 분석을 통해, 계층적 보안 시스템과 결합된 제안기법이 우회된 웹 공격에 대한 탐지능력이 탁월함을 보인다.

• 디지털융복합연구
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• 제12권10호
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• pp.291-297
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• 2014

웹 서비스는 인터넷과 같이 공개적인 네트워크 및 관련 표준을 통하여 다수의 어플리케이션을 운영체제 및 프로그램 언어에 관계없이 상호 운영이 가능 하도록 해주는 표준화된 소프트웨어 기술로써 상호간의 필요한 서비스 발견, 제공 하여다양한 서비스를 가능하게 해주는 분산 컴퓨팅 서비스이다. 현재 웹 환경에서 사용되는 다양한 검색 방법은 서비스 성능에 기반하고 있어 새로운 서비스에 대한 서비스 선정에 문제점이 있다. 또한 웹 서비스의 성능을 기반으로 서비스 선정이 이루어져 서비스의 성능이 향상되거나 새로운 서비스가 발견되어도 기존의 서비스 순위에 밀려 계속적으로 서비스 선정이 이루어지지 못하는 기아현상이 발생한다. 따라서 본 논문에서는 서비스 선정에서 발생하는 기아현상을 해결하기 위해 확장 가능한 정보를 기반으로 서비스 성능의 향상이나 사용자가 원하는 정보를 획득하여 서비스 선정에 반영하여 웹 서비스 선정 시 발생하는 웹 서비스 기아현상을 해결하여 사용자에게 적합한 웹 서비스를 선정 할 수 있도록 한다.

• International Journal of Knowledge Content Development & Technology
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• 제4권2호
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• pp.97-108
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• 2014

Institutional repositories are essential research infrastructures for research-based universities. A properly dimensioned institutional repository has the potential to increase research impact and enhance the visibility of an institution through its scholarly outputs. The aim of the study reported in this paper was to design and develop a web-based digital repository for scholarly communications using NM-AIST as a case study. The system was developed using open source software. Findings obtained from system validation tests show that the system is a viable solution to the major challenges encountered in the management and sharing of scholarly information at the institution.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -1
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• pp.250-253
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• 2002

We have implemented an interactive multimedia education system for C programming. The system consists of two pars. One is multimedia contents to help students better understand C language syntax, programming style, and program logic and the other is a web-based compilation support system that compiles C programs at the server side which are submitted trough Web by students and returns their execution results to the students' PC. Although there are currently some restrictions that students should replace the inputs functions such as scanf(), getc() and getch() with assignment statements or fscanf(fp, , ), since the system has been implemented using general web technologies and shareware C compiler, the education system could be one solution that education institutions seek to reduce annual immense expenditure of money on C complier.

• International journal of advanced smart convergence
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• 제12권2호
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• pp.90-95
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• 2023

With the rapid development of deep learning and artificial intelligence, generative models have achieved remarkable success in the field of image generation. By combining the stable diffusion method with Web UI technology, a novel solution is provided for the application of AI painting generation. The application prospects of this technology are very broad and can be applied to multiple fields, such as digital art, concept design, game development, and more. Furthermore, the platform based on Web UI facilitates user operations, making the technology more easily applicable to practical scenarios. This paper introduces the basic principles of Stable Diffusion Web UI technology. This technique utilizes the stability of diffusion processes to improve the output quality of generative models. By gradually introducing noise during the generation process, the model can generate smoother and more coherent images. Additionally, the analysis of different model types and applications within Stable Diffusion Web UI provides creators with a more comprehensive understanding, offering valuable insights for fields such as artistic creation and design.

• 한국정보과학회논문지:데이타베이스
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• 제33권7호
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• pp.715-726
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• 2006

웹 서비스는 인터넷 상에 분산되어 있는 이질적인 응용들 사이의 연동 및 통합을 위한 표준화된 수단을 제공한다. 본 논문에서는 계층적인 연동 관계가 존재하는 복합 웹 서비스들에 대해 서비스 결과로 전달되는 내포 데이타를 활용하여 웹 서비스들의 호출 및 복귀 작업을 서버 및 통신 비용에 따라 효과적으로 분산 수행함으로써 웹 서비스 시스템의 전체적인 성능을 향상시킬 수 있는 방안을 제시한다. 본 논문에서는 내포 결과를 이용한 적법한 웹 서비스 호출 실행 계획 및 이에 대한 비용 기반 최적화 문제를 정의하고, 최적 호출 실행 계획을 찾기 위한 휴리스틱 탐색 방법과 효율적으로 수행될 수 있는 그리디 알고리즘을 제안한다. 실험 결과, 제안한 그리디 알고리즘은 빠른 시간 내에 최적 해에 가까운 효율적인 호출 실행 계획을 생성하며, 복잡한 웹 서비스 연동 관계에 대해서 우수한 확장성을 보였다.

• 정보처리학회논문지A
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• 제8A권3호
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• pp.201-208
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• 2001

웹의 기하급수적인 성장과 클라이언트의 비균일적 요청 특성은 웹 서버의 성능에 큰 영향을 주었으며, 이의 해결책으로 서버 캐쉬가 제안되었다. 본 논문에서는 웹 서버 참조의 반복성, 참조 크기 및 참조적 지역성 등의 특성들을 분석하고, 그 결과를 이용하여 서버 캐쉬의 히트율을 높이기 위한 기존 캐쉬 제거 방식의 예측을 통한 서버 캐쉬의 선인출 기법을 제안한다. 또한 웹사이트의 추적 자료에 의한 시뮬레이션을 수행하여 제안된 기법에 의한 성능 개선을 분석 제시한다.