• Title/Summary/Keyword: computing environment

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Design and Implement Ubiquitous System on Chip for IEEE 802.15.4 WPAN Standard

  • Doo, Kyoung;Kim, Young-Sam;Kim, Sun-Kuk;Lee, Kang-Whan
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.697-698
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    • 2008
  • Ubiquitous Computing System is available anytime, anywhere communications and computing systems, and information sharing and mutual cooperation between computing systems. in addition, For Ubiquitous Computing System, it is need the sensor technology to detect information of users and surrounding environment. For these reason, this paper proposed CRS(Context Recognition Switch) and DOS(Dynamic and Optimal Standard) based Context-awareness system architecture.

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Monitoring of Virtual Machines in the Eucalyptus Cloud

  • Nandimandalam, Mohan Krishna Varma;Choi, Eunmi
    • Proceedings of the Korea Information Processing Society Conference
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    • 2013.11a
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    • pp.169-171
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    • 2013
  • Cloud computing provides access to big volumes of data and computational resources through various services. Cloud computing also supports to process these volumes of data using set of computers. Cloud computing can satisfy resource requirements through virtualization technology. Eucalyptus is an open source cloud computing environment helps the users to setup their own private cloud based on virtualization. In this paper, monitoring of virtual machines is explained with the eucalyptus cloud setup.

Outsourcing Business to cloud computing with communication services

  • Chou, Nory;Lee, Minsoo
    • Proceedings of the Korea Information Processing Society Conference
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    • 2010.11a
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    • pp.146-147
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    • 2010
  • This paper describes business on cloud computing service and the development of solution in the business Architecture in outsourced services environment for communication. Cloud computing is so popular and make people life easier. Business process outsourcing has become attractive to both large and small businesses with the advent of service oriented and specifically web service technology.

A Study on the Object Security in Distributed Computing Environment (분산 컴퓨팅 환경에서 객체 보안에 관한 연구)

  • Song, Gi-Beom;Lee, Jeong-Ki;Park, Chan-Mo;Roh, Jeong-Hee;Lee, Gwang;Lee, Joon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2002.05a
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    • pp.477-480
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    • 2002
  • Transparency of position that provide quick service regardless of physical position to users in distribution computing environment is getting into prominence and is developed in component form that many application softwares take advantage of distributed object technology. Because design object in distribution computing environment and OMG introduces OMA for embody, defined CORBA by standard of distributed object technology on OMA's abstract picture object model. Security service in CORBA platform is very important. Present object security service in distribution computing environment that refer standard of sorority and security models of distribution computing platform in CORBA in this treatise and follow in CORBA security service rules.

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Design and Implementation of Workflow-based User Environment on Computational Grid (계산 그리드에서 워크플로우 기반의 사용자 환경 설계 및 구현)

  • Hwang, Sun-Tae;Sim, Gyu-Ho
    • Journal of the Korea Society of Computer and Information
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    • v.10 no.4 s.36
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    • pp.165-171
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    • 2005
  • High speed computer, large scale storage device and high speed computer network are computing infrastructure which we can easily access to in these days. However, many computer simulations in natural or applied science such as molecular simulation require more computing power as well as larger scale of storage. Grid computing which is a next generation of distributed computing environment, is one of solution for the new requirements. Even though many researches have been going on Grid computing, those are oriented to communication interface and protocols, and middleware like globus tool kits[2, 3]. Therefore research on application level platform or application itself is yet premature and it makes real users be difficult to utilize Grid system for their research. In this paper, we suggest a new user environment and an abstract job model for simulation experiments on MGrid(Molecular Simulation Grid). It will make users be able to utilize Grid resources efficiently and reliably.

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Distributed Mutual Exclusion Algorithm for Maintaining Tree-Height Balance in Mobile Computing Environments (이동 컴퓨팅 환경에서 트리 높이의 균형을 유지하는 상호 배제 알고리즘)

  • Kim, Hyeong-Sik;Eom, Yeong-Ik
    • Journal of KIISE:Computer Systems and Theory
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    • v.26 no.10
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    • pp.1206-1216
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    • 1999
  • 이동 호스트란 시간과 공간의 제약 없이 필요한 기능을 수행하고, 또한 원하는 정보에 접근할 수 있는 휴대용 컴퓨터를 일컫는다. 이동 컴퓨팅 환경이란 이러한 이동 호스트들을 지원할 수 있도록 구성된 분산 환경이다. 따라서 이동 컴퓨팅 환경에서의 분산 알고리즘은 정적 호스트만을 고려한 기존의 분산 환경에서와는 다르게 이동 호스트의 여러 가지 특성들을 고려하여 제안되어야 한다. 즉, 이동 컴퓨팅 환경의 도래로 인하여 이동성과 휴대성, 그리고 무선 통신과 같은 특성들을 고려한 새로운 분산 상호 배제 알고리즘이 필요하다. 이제까지 이동 컴퓨팅 환경에서의 상호 배제 알고리즘은 토큰 링 구조에 기반을 두고 설계되었다. 토큰 링 구조는 이동 호스트들의 위치를 유지하기 위하여 높은 비용을 필요로 하는 단점을 가지고 있다. 본 논문에서는 균형 높이 트리(height-balanced tree)라는 새로운 모형을 제안함으로써 정적 분산 환경과 이동 분산 환경이 혼합된 환경에서 상호 배제 비용을 감소시킬 수 있는 새로운 알고리즘을 제안하며, 각 경우에 있어서의 비용을 산출하고 평가한다.Abstract The mobile host is a potable computer that carries out necessary functions and has the ability to access desirable informations without any constraints in time and space. Mobile computing environment is a distributed environment that is organized to support such mobile hosts. In that environment, distributed algorithms of which environment not only with static hosts but with mobile host's several properties should be proposed. With the emergence of mobile computing environments, a new distributed mutual exclusion method should be required to consider properties mobile computing system such as mobility, portability, and wireless communication. Until now, distributed mutual exclusion methods for mobile computing environments are designed based on a token ring structure, which have the drawbacks of requiring high costs in order to locate mobile hosts. In this paper, we propose a distributed mutual exclusion method that can reduce such costs by structuring the entire system as a height-balanced tree for static distributed networks and for networks with mobile hosts. We evaluated the operation costs in each case.

Development and application of online physical computing curriculum for pre-service teachers (예비교사를 위한 온라인 피지컬 컴퓨팅 교육과정 개발과 적용)

  • Kim, Tae-ryeong;Han, Sun-gwan
    • Journal of The Korean Association of Information Education
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    • v.25 no.4
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    • pp.621-632
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    • 2021
  • This study is about development and application of a curriculum to implement physical computing education in an online environment for pre-service teachers. First, a 15-week software and physical computing curriculum was designed according to the ADDIE instructional design model. As a tool that can be used online, education was conducted on a program using various sensors using Pocket Code, an EPL based on a smartphone. As a result of the application of the program, Personal efficacy, Pedagogical knowledge, Technology teaching content knowledge, Result expectation, and Student belief were all significantly improved. In the software attitude part, Software interest and Software value part increased significantly, and the Perception of software engineers did not change. In general, in the case of physical computing, it is difficult to execute in an online environment because it involves a lot of manipulation activity. Through various studies that can continue education in a non-face-to-face environment or a blended environment in the post-corona era, it is hoped that it will be possible to provide a high-quality curriculum to pre-service teachers in charge of future education.

The Study for Context Aware Information Retrieval in Ubiquitous Computing Environment Using UCC Resources (UCC자원을 이용한 유비쿼터스 컴퓨팅 환경에서의 상황인식 정보검색기법에 대한 연구)

  • Lee, Haesung;Kwon, Joonhee
    • Proceedings of the Korea Contents Association Conference
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    • 2009.05a
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    • pp.12-16
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    • 2009
  • Exponentially increasing UCC, experiences which some people get at the specific time and in the specific location are shared on the Web more easily. Also, UCC have been more reliable and more efficient resources, because of many people's natural valuation on each UCC. UCC have potential possibility to be primary factor in all ubiquitous computing environment. However, like ubiquitous computing techniques themselves the current availability and utilization of online UCC is far from realizing their full potential. In this paper, we propose a technique that integrates existing methods from information retrieval and tagging technologies to correspond with user's underlying need for some information in ubiquitous computing environment.

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Z-Clutching: Interaction Technique for Navigating 3D Virtual Environment Using a Generic Haptic Device

  • Song, Deok-Jae;Kim, Seokyeol;Park, Jinah
    • Journal of Computing Science and Engineering
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    • v.10 no.1
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    • pp.32-38
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    • 2016
  • Navigating a large 3D virtual environment using a generic haptic device can be challenging since the haptic device is usually bounded by its own physical workspace. On the other hand, mouse interaction easily handles the situation with a clutching mechanism-simply lifting the mouse and repositioning its location in the physical space. Since the haptic device is used for both input and output at the same time, in many cases, its freedom needs to be limited in order to accommodate such a situation. In this paper, we propose a new mechanism called Z-Clutching for 3D navigation of a virtual environment by using only the haptic device without any interruption or sacrifice in the given degrees of freedom of the device's handle. We define the clutching state which is set by pulling the haptic handle back into space. It acts similarly to lifting the mouse off the desk. In this way, the user naturally feels the haptic feedback based on the depth (z-direction), while manipulating the haptic device and moving the view as desired. We conducted a user study to evaluate the proposed interaction technique, and the results are promising in terms of the usefulness of the proposed mechanism.

A study on the role and application technology of the space explorer (우주 탐사선에서 파일 시스템의 역할 및 응용 기술 연구)

  • Koo, Cheol-Hea;Ju, Gwang-Hyeok
    • Aerospace Engineering and Technology
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    • v.12 no.2
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    • pp.91-98
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    • 2013
  • Computing environment of space explorer including LEO (Low Earth Orbit), GEO (Geosynchronous Earth Orbit) satellite may be considered as the same category of embedded system on the ground. But with comparison with personal computing environment it is widely accepted that the space computing is outdated and behind of state of the art. Especially file system which is nearly essential item in all ground computing environment including personal computer, workstation and server is rarely used in space explorer till lately. In this paper, a study of ESA PUS (Packet Utilization Standard) and CCSDS (Consultative Committee for Space Data Systems) community's activity, international trend, and applicable technical application for applying file system in oder to use these standards for utilizing the file system to deep space explorer is described.