A comprehensive analytical model of interconnection networks in large-scale cluster systems

2007 ◽  
Vol 20 (1) ◽  
pp. 75-97 ◽  
Author(s):  
Bahman Javadi ◽  
Jemal H. Abawajy ◽  
Mohammad K. Akbari
Keyword(s):  
Analytical Model ◽  
Interconnection Networks ◽  
Large Scale ◽  
Cluster Systems

Development and Modeling of a Highly-Adjustable Base Isolator Utilizing Magnetorheological Elastomer

2013 ◽  
Author(s):  
Yancheng Li ◽  
Jianchun Li
Keyword(s):  
Analytical Model ◽  
Seismic Isolation ◽  
Large Scale ◽  
Lateral Stiffness ◽  
Magnetorheological Elastomer ◽  
Isolation System ◽  
Vertical Loading ◽  
Base Isolator ◽  
Field Dependent ◽  
Dependent Property

This paper presents a recent research breakthrough on the development of a novel adaptive seismic isolation system as the quest for seismic protection for civil structures, utilizing the field-dependent property of the magnetorheological elastomer (MRE). A highly-adjustable MRE base isolator was developed as the key element to form smart seismic isolation system. The novel isolator contains unique laminated structure of steel and MRE layers, which enable its large-scale civil engineering applications, and a solenoid to provide sufficient and uniform magnetic field for energizing the field-dependent property of MR elastomers. With the controllable shear modulus/damping of the MR elastomer, the developed adaptive base isolator possesses a controllable lateral stiffness while maintaining adequate vertical loading capacity. Experimental results show that the prototypical MRE base isolator provides amazing increase of lateral stiffness up to 1630%. Such range of increase of the controllable stiffness of the base isolator makes it highly practical for developing new adaptive base isolation system utilizing either semi-active or smart passive controls. To facilitate the structural control development using the adaptive MRE base isolator, an analytical model was developed to stimulate its behaviors. Comparison between the analytical model and experimental data proves the effectiveness of such model in reproducing the behavior of MRE base isolator, including the observed strain stiffening effect.

scholarly journals Performance Analysis of Interconnection Networks for Multi-cluster Systems

2005 ◽  
pp. 205-212 ◽  
Author(s):  
Bahman Javadi ◽  
J. H. Abawajy ◽  
Mohammad K. Akbari
Keyword(s):  
Performance Analysis ◽  
Interconnection Networks ◽  
Cluster Systems

Performance Implications of Periodic Checkpointing on Large-Scale Cluster Systems

2005 ◽  
Author(s):  
A.J. Oliner ◽  
R.K. Sahoo ◽  
J.E. Moreira ◽  
M. Gupta
Keyword(s):  
Large Scale ◽  
Cluster Systems

scholarly journals LogMaster: Mining Event Correlations in Logs of Large-Scale Cluster Systems

2012 ◽  
Author(s):  
Xiaoyu Fu ◽  
Rui Ren ◽  
Jianfeng Zhan ◽  
Wei Zhou ◽  
Zhen Jia ◽  
...  
Keyword(s):  
Large Scale ◽  
Cluster Systems

K-PROCESSOR RELIABILITY OF LARGE-SCALE RING-BASED HIERARCHICAL INTERCONNECTIONS

2002 ◽  
Vol 09 (01) ◽  
pp. 61-77
Author(s):  
M. AL-ROUSAN ◽  
O. AL-JARRAH ◽  
M. MOWAFI
Keyword(s):  
Interconnection Networks ◽  
Large Scale ◽  
Network Reliability ◽  
Multiprocessor Systems ◽  
Hierarchical Systems ◽  
Hierarchical Networks ◽  
Coherent Interface ◽  
Large Acceptance ◽  
Ring Architecture ◽  
Scalable Coherent Interface

Recently, connecting thousands of processors via interconnection networks based on multiple (hierarchical) rings has an increased interest. This is due to the large acceptance and success of the Scalable Coherent Interface (SCI) technology. The inherently weak behavior of ring architecture has led interconnection designers to consider various choices to improve the overall network reliability. An interesting choice is to use braided rings instead of the single (basic) rings in the hierarchy. In this paper, we present new formulas for computing K-processor reliability of SCI ring-based hierarchical networks in the context of large-scale multiprocessor systems. The derived formulas are general and applicable to any given systems size consisting of an arbitrary number of levels. The reliability of hierarchical systems based on the basic and braided rings is evaluated and analyzed using the derived formulas. The results show that hierarchical systems based on braided rings significantly improve the reliability of hierarchies constructed of basic rings. The results are general and not limited to systems of SCI rings; the analysis is valid for any type of rings architecture such as token and slotted rings.

A simple projection moiré system to measure displacements of aircraft structures

2007 ◽  
Vol 42 (6) ◽  
pp. 477-495 ◽  
Author(s):  
U Galietti ◽  
K Genovese ◽  
L Lamberti ◽  
D Posa
Keyword(s):  
Analytical Model ◽  
Large Scale ◽  
Industrial Applications ◽  
Processing Method ◽  
Simple Analytical Model ◽  
Aerodynamic Loads ◽  
Out Of Plane ◽  
Plane Displacement ◽  
Good Agreement ◽  
Projection Moire

This work presents a simple projection moiré system (PMS) to measure displacements of large-scale aeronautical components. The system includes standard optics, uses a standard fringe-processing method, and relies on a simple analytical model to recover topographic information. An extensive calibration campaign, based on design of experiments, is conducted in order to find the best analytical model for retrieving the out-of-plane displacement field from the moiré pattern and to find the optimal combination of parameters involved in the measurement system. In order to check the suitability of the present PMS device for practical industrial applications, distortions induced by aerodynamic loads on a landing-light glazing of an Airbus A340 are measured. Experimental results are in good agreement with other measurements carried out independently.

scholarly journals Analysis of Interconnection Networks in Heterogeneous Multi-Cluster Systems

2006 ◽  
Author(s):  
B. Javadi ◽  
J.H. Abawajy ◽  
M.K. Akbari ◽  
S. Nahavandi
Keyword(s):  
Interconnection Networks ◽  
Cluster Systems
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