• 제목/요약/키워드: Storage Integration

검색결과 206건 처리시간 0.027초

A fourth order finite difference method applied to elastodynamics: Finite element and boundary element formulations

  • Souza, L.A.;Carrer, J.A.M.;Martins, C.J.
    • Structural Engineering and Mechanics
    • /
    • 제17권6호
    • /
    • pp.735-749
    • /
    • 2004
  • This work presents a direct integration scheme, based on a fourth order finite difference approach, for elastodynamics. The proposed scheme was chosen as an alternative for attenuating the errors due to the use of the central difference method, mainly when the time-step length approaches the critical time-step. In addition to eliminating the spurious numerical oscillations, the fourth order finite difference scheme keeps the advantages of the central difference method: reduced computer storage and no requirement of factorisation of the effective stiffness matrix in the step-by-step solution. A study concerning the stability of the fourth order finite difference scheme is presented. The Finite Element Method and the Boundary Element Method are employed to solve elastodynamic problems. In order to verify the accuracy of the proposed scheme, two examples are presented and discussed at the end of this work.

온-프레미스 기반 지속적인 자원 서비스를 위한 서버 무중단 기법 (Non-Disruptive Server Management for Sustainable Resource Service Based on On-Premise)

  • 김현우
    • 정보처리학회논문지:컴퓨터 및 통신 시스템
    • /
    • 제7권12호
    • /
    • pp.295-300
    • /
    • 2018
  • 최근 IT 기술의 급성장에 따라 종래의 많은 수동적인 업무가 자동화되었다. 이러한 자동화를 통해 많은 사람들의 여가 시간이 증대되고 이를 위한 다양한 서비스들이 개발되고 있다. 또한, 소형화되고 휴대에 편리한 스마트 디바이스의 등장으로 시간과 장소에 구애를 받지 않고 다양한 인터넷 서비스 이용이 가능하다. 많은 디바이스 및 서비스에서 발생되는 빅 데이터의 효율적인 저장 처리를 위해 가상화 기반의 다양한 연구들이 진행되고 있다. 이러한 연구 중에 온-프레미스 기반 분산된 데스크탑 자원을 통합하고 사용자에게 제공하는 데스크탑 스토리지 가상화는 가상화를 이용하여 분산된 레거시 데스크탑내에 사용되지 않는 자원을 통합한다. 이는 사용자에게 신뢰성 제공을 위한 고가용성이 매우 중요시된다. 또한, 분산된 데스크탑 기반 자원 통합 환경에서 효율적인 데이터 분배 저장 처리를 위한 계층적 구조 및 자원통합 연구들이 진행되고 있다. 그러나 온-프레미스 기반 자원 통합 환경에서 서버 고장 발생시 효율적인 대처를 위한 운영 연구가 미흡하다. 이러한 운영적 서버 고가용성을 위해 본 논문에서는 온-프레미스 기반 분산된 데스크탑내 스토리지 통합 환경에서 데스크탑 서버의 장애 발생에 따른 능동적인 대처가 가능한 무중단 서버 관리 기법을 제안한다. 이는 데스크탑 기반 통합 환경에서 데스크탑 추가 및 제거가 용이하다. 또한, 장애발생에 따라 대체 서버가 능동적으로 수행된다.

2차원 유체-구조뭍-지반계의 지진응답해석 (Earthquake Response Analysis for 2-D Fluid-Structure-Soil Systems)

  • 윤정방;장수혁;김재민;홍선기
    • 한국전산구조공학회:학술대회논문집
    • /
    • 한국전산구조공학회 2000년도 봄 학술발표회논문집
    • /
    • pp.289-296
    • /
    • 2000
  • This paper presents a method of seismic analysis for a 2-D fluid-structure-soil interaction systems. With this method, the fluid can be modeled by spurious free 4-node displacement-based fluid elements which use rotational penalty and mass projection technique in conjunction with the one point reduced integration scheme to remove the spurious zero energy modes. The structure and the near-field soil are discretized by the standard 2-D finite elements, while the unbounded far-field soil is represented by the dynamic infinite elements in the frequency domain. Since this method directly models the fluid-structure-soil interaction systems, it can be applied to the dynamic analysis of a 2-D liquid storage structure with complex geometry. Finally, results of seismic analyses are presented for a spent fuel storage tank embedded in a layered half-space and a massive concrete dam on a layered half-space.

  • PDF

Integration of the PubAnnotation ecosystem in the development of a web-based search tool for alternative methods

  • Neves, Mariana
    • Genomics & Informatics
    • /
    • 제18권2호
    • /
    • pp.18.1-18.5
    • /
    • 2020
  • Finding publications that propose alternative methods to animal experiments is an important but time-consuming task since researchers need to perform various queries to literature databases and screen many articles to assess two important aspects: the relevance of the article to the research question, and whether the article's proposed approach qualifies to being an alternative method. We are currently developing a Web application to support finding alternative methods to animal experiments. The current (under development) version of the application utilizes external tools and resources for document processing, and relies on the PubAnnotation ecosystem for annotation querying, annotation storage, dictionary-based tagging of cell lines, and annotation visualization. Currently, our two PubAnnotation repositories for discourse elements contain annotations for more than 110k PubMed documents. Further, we created an annotator for cell lines that contain more than 196k terms from Cellosaurus. Finally, we are experimenting with TextAE for annotation visualization and for user feedback.

2차원 유체-구조물-지반계의 지진응답해석 (Earthquake Response Analysis for 2-D Fluid-Structure-Soil Systems)

  • 윤정방;장수혁;김재민
    • 한국해양공학회:학술대회논문집
    • /
    • 한국해양공학회 2001년도 추계학술대회 논문집
    • /
    • pp.132-137
    • /
    • 2001
  • This paper presents a method of seismic analysis for a 2-D fluid-structure-soil interaction systems. With this method, the fluid can be modeled by spurious free 4-node displacement-based fluid elements which use rotational penalty and mass projection technique in conjunction with the one point reduced integration scheme to remove the spurious zero energy modes. The structure and the near-field soil are discretized by the standard 2-D finite elements, while the unbounded far-field soil is represented by the dynamic infinite elements in the frequency domain. Since this method directly models the fluid-structure-soil interaction systems, it can be applied to the dynamic analysis of a 2-D liquid storage structure with complex geometry. Finally, results of seismic analyses are presented for a spent fuel storage tank embedded in a layered half-space and a massive concrete dam on a layered half-space.

  • PDF

X-Ray TDI Camera를 이용한 알루미늄 주강품 검사장치 개발 (Development of Inspection System for Aluminum Castings with X-Ray TDI Camera)

  • 남문호;박성욱;김창호;정찬수
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2011년도 제42회 하계학술대회
    • /
    • pp.1734-1735
    • /
    • 2011
  • In case of inspection on aluminum castings, traditional RT (Radiographic Testing) method have been utilized for its advantages in interpretation, cost and perpetual storage. But it has disadvantages like time consumption in film processing, low efficiency in storage and environmental pollution. In this thesis, a DRS (Digital Radiography System) utilizing X-Ray TDI Camera (Time Delay and Integration Camera) is developed. Inspections on aluminum castings are performed using the developed Digital Radiography System, DRS and reviewed if newly developed system can substitute for the traditional method.

  • PDF

DC 배전시스템에서 Voltage Bus Conditioner를 위한 PI 보상기 설계 (The Design of the PI Compensator for a Voltage Bus Conditioner in the DC Distributed Power System)

  • 김영석;석봉준;나재두
    • 전기학회논문지
    • /
    • 제59권12호
    • /
    • pp.2195-2201
    • /
    • 2010
  • The VBC(Voltage Bus Conditioner) is a bidirectional DC-DC converter with the energy storage for damping the instability and any transients of bus voltage in the DC DPS(Distributed Power System). This paper presents the PI(Proportional Integration) controller for the VBC. The PI controller is not only damping the bus transient, but also keeping the storage voltage level. Matlab Simulink simulation and experimental results are presented by validity of the proposed control technique.

사용후핵연료 저장용기의 지진시 활동거동 (Sliding Response of Spent Fuel Storage Cask to Earthquake)

  • 최인길;전영선
    • 한국전산구조공학회:학술대회논문집
    • /
    • 한국전산구조공학회 1996년도 가을 학술발표회 논문집
    • /
    • pp.70-77
    • /
    • 1996
  • In this study, sliding response analysis of free standing structure such as multi-purpose nuclear spent fuel storage cask is peformed. The governing factors of sliding response are aspect ratio of structure and ground acceleration. The vertical acceleration component is very important factor in the sliding response of the structure. Based on the mathematical model, computer program is developed using direct forward integration method to predict the sliding response. Using the program, several parametric studies were made for sinusodial ground motion and for El Centre 1940 earthquake and Mexico 1973 earthquake. From the results, it is known that the frequency content and duration of strong motion affect the sliding of the structure.

  • PDF

벌크 마이크로머시닝 기술을 이용한 박형 광픽업용 SiOB 제작 (The Fabrication of SiOB by using Bulk Micromachining Process for the Application of Slim Pickup)

  • 최석문;박성준;황웅린
    • 정보저장시스템학회논문집
    • /
    • 제1권2호
    • /
    • pp.175-181
    • /
    • 2005
  • SiOB is an essential part of slim optical pickup, where the silicon mirror, LD stand, silicon PD are integrated and LD is flip chip bonded. SiOB is fabricated with bulk micromachining. Especially the fabrication of silicon wafer with stepped concave areas has many extraordinary difficulties. As a matter of fact, experiences and knowledges are rare in the fabrication of the highly stepped silicon wafer. The difficulties occurring in the integration of PD and SiOB, and highly stepped patterning, and silicon mirror roughness and how-to-solve will be discussed.

  • PDF

힘의 방향성을 고려한 전자기 커플러의 위상 최적화 (Topology Optimization of an Electromagnetic Coupler Considering Force Direction)

  • 양승진;유정훈
    • 정보저장시스템학회논문집
    • /
    • 제2권4호
    • /
    • pp.230-235
    • /
    • 2006
  • The machine locking system is an important device for the safety of persons using the machine. In this study, a locking system using electromagnetic fields is proposed to decrease the defects and the cost for repairing and maintenance of the existing locking system using structural mechanism. We analyze the electromagnetic locking system and calculate the generated force considering direction by the finite element method. Also, we set up two design domains for the topology optimization; first domain is optimized to reduce the volume and the other is optimized to maximize the generated force keeping the volume, especially. The optimal design is obtained by integration of the two optimized results. An improved design is obtained by the optimal topology and it is confirmed by comparison with the initial locking system.

  • PDF