• Title/Summary/Keyword: Environment of Architecture

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Design and Implementation of a Scalable Framework for Parallel Program Performance Visualization (병렬 프로그램 성능가시화를 위한 확장성 있는 프레임워크 설계 및 구현)

  • Moon, Sang-Su;Moon, Young-Shik;Kim, Jung-Sun
    • Journal of KIISE:Computing Practices and Letters
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    • v.7 no.2
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    • pp.109-120
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    • 2001
  • In this paper, we propose the design and implementation of a portable, extensible, and efficient performance visualization framework for high performance parallel program development. The framework adopts a layered architecture:consists of three independent layers instrumentation layer, trace interface layer and visualization layer. The instrumentation layer was constructed as an ECL which captures generated events, and the EDL/JPAL constitutes the trace interface layer to provide problem-oriented interfaces between visualization layer and instrumentation layer. Finally, the visualization layer was designed as plug-and-play style for easy elimination, addition and composition of various filters, views and view groups, The proposed performance visualization framework is expected to be used as an independent performance debugging and analysis tool and as a core component in an integrated parallel programming environment.

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Design of an Efficient VLSI Architecture and Verification using FPGA-implementation for HMM(Hidden Markov Model)-based Robust and Real-time Lip Reading (HMM(Hidden Markov Model) 기반의 견고한 실시간 립리딩을 위한 효율적인 VLSI 구조 설계 및 FPGA 구현을 이용한 검증)

  • Lee Chi-Geun;Kim Myung-Hun;Lee Sang-Seol;Jung Sung-Tae
    • Journal of the Korea Society of Computer and Information
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    • v.11 no.2 s.40
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    • pp.159-167
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    • 2006
  • Lipreading has been suggested as one of the methods to improve the performance of speech recognition in noisy environment. However, existing methods are developed and implemented only in software. This paper suggests a hardware design for real-time lipreading. For real-time processing and feasible implementation, we decompose the lipreading system into three parts; image acquisition module, feature vector extraction module, and recognition module. Image acquisition module capture input image by using CMOS image sensor. The feature vector extraction module extracts feature vector from the input image by using parallel block matching algorithm. The parallel block matching algorithm is coded and simulated for FPGA circuit. Recognition module uses HMM based recognition algorithm. The recognition algorithm is coded and simulated by using DSP chip. The simulation results show that a real-time lipreading system can be implemented in hardware.

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Web System Development Process based on Domain Features : Content centric Domain and Data centric Domain (도메인 특성에 근거한 웹 시스템 개발 프로세스 : 컨텐트 중심 도메인 및 데이터 중심 도메인)

  • Park, Su-Yong;Im, Seong-Jae
    • The KIPS Transactions:PartD
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    • v.9D no.1
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    • pp.111-126
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    • 2002
  • As the technical aspect of the web system development is, unlike the existing main frame or client/server environment, greatly influenced by the dynamic and variable factors and carried out in a comparatively short period, practical and efficient process to which the developer may adapt with ease is very much required for the web system development. However, while the technological substitute, language and architecture composition have been much discussed, in connection with web system development growing rapidly, standardized development process and its deliverables have been rarely discussed. This thesis analyzes problems of the existing web system development processes and as the substitutes for them, proposes web system development process based on the domain features derived from the concepts of iteration and increment. For the classification of domains, five domains in total are set by interlocking web system factors and web site types and the workflows for two domains applied to projects are incorporated focused on work content and deliverables. The proposed process applies to the development of intranet system and is compared with the existing web development processes by the measure classified into components and elements.

A Study on the Spatial Characteristics in the Residential Designs by Vilhelm Wohlert - Focusing on Program Composition, Spatialization, Multidimensional Experience - (빌헬름 볼러트의 주택 작품에 나타난 공간적 특성에 관한 연구 - 프로그램 구성, 공간구축, 다차원적 경험을 중심으로 -)

  • Kim, Jong-Jin
    • Korean Institute of Interior Design Journal
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    • v.21 no.3
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    • pp.3-10
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    • 2012
  • Vilhelm Wohlert is the Danish architect who designed Louisiana Museum of Modern Art near Copenhagen. Because of Louisiana Museum's popularity, Vilhelm Wohlert's name was started to be aware since 1990s. Although he is a well-known architect in Denmark, unfortunately his name is unknown in other countries. He designed various design projects from small scale furniture design to large scale museum and public projects. There are three programmatic categories in his architecture: exhibition programs including Louisiana Museum, residential program including private houses, and public programs including churches and schools. This thesis focuses on his residential design projects. Even though he designed a multi-family houses, Wohlert's house design consists of mainly one-off large private houses located in a nice natural environment. In chapter 3, the general history of his house projects was studied. Among them, the first exhibition house for Forum was explained more deeply to show Wohlert's early house design philosophy. In chapter 4, three built house projects were analyzed in detail. Analytical diagrams were used to show the key elements in the residential space. They are program composition, circulation, spatialization elements, final construction. His buildings have been compared with Alvar Aalto, Frank Lloyd Wright, and other Scandinavian architects. But there are some major differences that make Wohlert's design unique. In chapter 5, the case analysis results were summarized together to highlight the specific design characteristics found in Wohlert's residential design process. The universal spatial quality found in his residential projects can be applied in contemporary spatial designs.

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Anomaly Detection of Hadoop Log Data Using Moving Average and 3-Sigma (이동 평균과 3-시그마를 이용한 하둡 로그 데이터의 이상 탐지)

  • Son, Siwoon;Gil, Myeong-Seon;Moon, Yang-Sae;Won, Hee-Sun
    • KIPS Transactions on Software and Data Engineering
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    • v.5 no.6
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    • pp.283-288
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    • 2016
  • In recent years, there have been many research efforts on Big Data, and many companies developed a variety of relevant products. Accordingly, we are able to store and analyze a large volume of log data, which have been difficult to be handled in the traditional computing environment. To handle a large volume of log data, which rapidly occur in multiple servers, in this paper we design a new data storage architecture to efficiently analyze those big log data through Apache Hive. We then design and implement anomaly detection methods, which identify abnormal status of servers from log data, based on moving average and 3-sigma techniques. We also show effectiveness of the proposed detection methods by demonstrating that our methods identifies anomalies correctly. These results show that our anomaly detection is an excellent approach for properly detecting anomalies from Hadoop log data.

Real-Time Change Detection Architecture Based on SOM for Video Surveillance Systems (영상 감시시스템을 위한 SOM 기반 실시간 변화 감지 기법)

  • Kim, Jongwon;Cho, Jeongho
    • The Journal of Korean Institute of Information Technology
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    • v.17 no.4
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    • pp.109-117
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    • 2019
  • In modern society, due to various accidents and crime threats committed to an unspecified number of people, individual security awareness is increasing throughout society and various surveillance techniques are being actively studied. Still, there is a decline in robustness due to many problems, requiring higher reliability monitoring techniques. Thus, this paper suggests a real-time change detection technique to complement the low robustness problem in various environments and dynamic/static change detection and to solve the cost efficiency problem. We used the Self-Organizing Map (SOM) applied as a data clustering technique to implement change detection, and we were able to confirm the superiority of noise robustness and abnormal detection judgment compared to the detection technique applied to the existing image surveillance system through simulation in the indoor office environment.

Comparison of Virtual 3D Tree Modelling Using Photogrammetry Software and Laser Scanning Technology (레이저스캐닝과 포토그래메트리 소프트웨어 기술을 이용한 조경 수목 3D모델링 재현 특성 비교)

  • Park, Jae-Min
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.24 no.2
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    • pp.304-310
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    • 2020
  • The technology in 3D modelling have advanced not only maps, heritages, constructions but also trees modelling. By laser scanning(Faro s350) and photogrammetry software(Pix4d) for 3D modelling, this study compared with real coniferous tree and both technology's results about characteristics of shape, texture, and dimensions. As a result, both technologies all showed high reproducibility. The scanning technique showed very good results in the reproduction about bark and leaves. Comparing the detailed dimensions on it, the error between the actual tree and modelling with scanning was 1.7~2.2%, and the scanning result was larger than the actual tree. The error between the actual tree and photogrammetry was only 0.2~0.5%, which was larger than the actual tree. On the other hand, the dark areas's modelling was not fully processed. This study is meaningful as a basic research that can be used for tree DB on BIM for the landscape architecture, landscape design and analysis with AR technology, historical tree and heritage also.

A Study for Integrating ICS Security Logs with Centralized SIEM (Security Information and Event Management) using OPC Protocol (OPC 프로토콜을 활용한 제어시스템 보안로그 전송방법 고찰 및 통합 로그서버 구축방안)

  • Kim, Jaehong;Park, Yongsuk
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.26 no.8
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    • pp.1205-1212
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    • 2022
  • Cyber threat targeting ICS (Industrial Control System) has indicated drastic increases over the past decade and Cyber Incident in Critical Infrastructure such as Energy, Gas Terminal and Petrochemical industries can lead to disaster-level accidents including casualties and large-scale fires. In order to effectively respond to cyber attacks targeting ICS, a multi-layered defense-in-depth strategy considering Control System Architecture is necessary. In particular, the centralized security log system integrating OT (Operational Technology) and IT (Information Technology) plays an important role in the ICS incident response plan. The paper suggests the way of implementing centralized security log system that collects security events and logs using OPC Protocol from Level 0 to Level 5 based on IEC62443 Purdue Model to integrate ICS security logs with SIEM (Security Information Event Management) operated in IT environment.

Analysis of Data Isolation Methods for Secure Web Site Development in a Multi-Tenancy Environment (멀티테넌시 환경에서 안전한 웹 사이트 개발을 위한 데이터격리 방법 분석)

  • Jeom Goo Kim
    • Convergence Security Journal
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    • v.24 no.1
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    • pp.35-42
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    • 2024
  • Multi-tenancy architecture plays a crucial role in cloud-based services and applications, and data isolation within such environments has emerged as a significant security challenge. This paper investigates various data isolation methods including schema-based isolation, logical isolation, and physical isolation, and compares their respective advantages and disadvantages. It evaluates the practical application and effectiveness of these data isolation methods, proposing security considerations and selection criteria for data isolation in the development of multi-tenant websites. This paper offers important guidance for developers, architects, and system administrators aiming to enhance data security in multi-tenancy environments. It suggests a foundational framework for the design and implementation of efficient and secure multi-tenant websites. Additionally, it provides insights into how the choice of data isolation methods impacts system performance, scalability, maintenance ease, and overall security, exploring ways to improve the security and stability of multi-tenant systems.

Performance evaluation of API Gateway in GraalVM and Virtual Thread environment (GraalVM 및 Virtual Thread 환경에서 API Gateway의 성능 평가)

  • Dong-il Cho
    • Journal of Internet Computing and Services
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    • v.25 no.4
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    • pp.39-46
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    • 2024
  • An API gateway is a high-availability component that provides a single entry point for API clients outside the cloud to connect with services inside the cloud. It has a high risk of creating bottlenecks and requires redeployment when services change. The Java language, in which several API gateways are implemented, announced technologies called GraalVM Native Image and Virtual Thread to overcome problems with deployment and operational performance. Applying these technologies to Java applications requires changes to the source code and deployment procedures. In this study, the performance of the API gateway was measured and analyzed when it operated based on GraalVM Native Image and Java Virtual Machine(JVM) and between Virtual Thread and Reactive thread processing methods. In this study, evaluation indicators were selected to evaluate deployment performance and operational performance, and the performance of the evaluation indicators was measured and evaluated in four environments.