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Emil Budescu¹, Lucian Popescu², Ioan Iacob², Eugen Merticaru¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.3, pp. 85-90, 2008, DOI:10.3970/icces.2008.008.085
Abstract This article has no abstract. More >

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591

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ABSTRACT

Chang Kook Oh¹, Hoon Sohn¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.3, pp. 91-100, 2008, DOI:10.3970/icces.2008.008.091
Abstract Structural Health Monitoring (SHM) is concerned with identifying damage based on measurements obtained from structures being monitored. For the civil structures exposed to time-varying environmental and operational conditions, it is inevitable that environmental and operational variability produces an adverse effect on the dynamic behaviors of the structures. Since the signals are measured under the influence of these varying conditions, normalizing the data to distinguish the effects of damage from those caused by the environmental and operational variations is important in order to achieve successful structural health monitoring goals. In this paper, kernel principal component analysis (kernel PCA) using unsupervised support… More >

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727

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R. E. Meyers¹, K. S. Deacon¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.3, pp. 101-106, 2008, DOI:10.3970/icces.2008.008.101
Abstract A new type of imaging, Quantum ghost imaging, is described that is based on the measurement of photons reflected from an object . A CCD array is placed facing a chaotic light source and gated by a photon counting detector that simply counts all randomly reflected photons from an object. A ``ghost'' image of the object is then observed in the gated CCD. This interesting demonstration is not only useful for practical applications, such as x-ray lensless imaging, but is also important from a fundamental point of view. It further explores the nonclassical two-photon interference nature of thermal light ghost… More >

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658

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E. Schnack¹, K. Kolk², A. Dimitrov³
The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.3, pp. 107-114, 2008, DOI:10.3970/icces.2008.008.107
Abstract In fracture mechanics, corner and wedge singularities have to be considered for two- and three-dimensional problems in isotropic and layered anisotropic continua. To investigate the behaviour of crack propagation starting from corners and edges the information about stress asymptotics in the vicinity of three-dimensional corner points is needed [1]. Thus, in this paper two aspects are studied: the interface crack in layered anisotropic materials with re-entrant corners and surface cracks in homogeneous isotropic continua. Moreover a strategy is presented to model such surface breaking cracks efficiently within a numerical 3D simulation [2]. To study the effect of geometrical singularities generalized… More >

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597

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Sang-Hyun Lee¹, Sung-Sik Woo¹, Seung-Ho Cho¹, Lan Chung¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.3, pp. 115-120, 2008, DOI:10.3970/icces.2008.008.115
Abstract In this study, based on the results from the sinusoidal base excitation analyses of a single degree of freedom system with a tuned mass damper (TMD), the optimal friction is computed so that the rail friction improve the performance of the TMD. The magnitude of the optimal friction increases with increasing mass ratio of the TMD and decreases with increasing structural damping. Particularly, it is observed that the optimized friction force gives better control performance than the optimized viscous damping of the TMD. However, because the performance of the TMD considerably deteriorates when the friction force increases over the optimal… More >

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794

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A.P.S. Selvadurai¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.3, pp. 121-126, 2008, DOI:10.3970/icces.2008.008.121
Abstract This paper examines the mechanics of brittle fragmentation that can occur in geomaterials subjected to critical stress states that promote fragmentation as opposed to plastic flow. The discrete element technique is used to examine the dynamic interaction between a moving ice floe and a stationary structure. The results illustrate the influence of fragmentation on the reduction of the dynamic interactive stresses. More >

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