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  • Open Access

    ARTICLE

    Production of a double-purpose wheat*

    Merchán HD, EE Lutz, AE Morant*

    Phyton-International Journal of Experimental Botany, Vol.75, pp. 41-46, 2006, DOI:10.32604/phyton.2006.75.041

    Abstract In the mixed systems (beef and grain) of the semiarid Pampa, double purpose wheat use might diminish competition by the soil resource, external inputs into the system and money, which are often associated between winter cereals for grazing and/or grain harvest. In the experimental station of the Asociación de Cooperativas Argentinas in Cabildo (wheat semiarid subregion V S), a trial to evaluate shoot and grain production was conducted. The wheat (Triticum aestivum L.) variety Buck Charrúa, commercially recommended for double purpose use was utilized. Grain production of autumn-sown plots, which were defoliated 0, 1, 2 or… More >

  • Open Access

    ARTICLE

    A Strain Energy Density Rate Approach to the BEM Analysis of Creep Fracture Problems

    C.P. Providakis1

    Structural Durability & Health Monitoring, Vol.2, No.4, pp. 249-254, 2006, DOI:10.3970/sdhm.2006.002.249

    Abstract This paper explores the concept of strain energy density rate in relation to the crack initiation in fracture analysis problems arising in creeping cracked structural components. The analysis of the components is performed by using the boundary element methodology in association with the employment of singular boundary elements for the modeling of the crack tip region. The deformation of the material is assumed to be described by an elastic power law creep model. The strain energy density rate theory is applied to determine the direction of the crack initiation for a center cracked plate in More >

  • Open Access

    ARTICLE

    Advanced Design Concepts and Maintenance by Integrated Risk Evaluation for Aerostructures

    R. Citarella1, A. Apicella2

    Structural Durability & Health Monitoring, Vol.2, No.3, pp. 183-196, 2006, DOI:10.3970/sdhm.2006.002.183

    Abstract This paper presents an overview of the achievements of a research and development project sponsored by the European Commission in the general area of Key Actions and New Perspectives in Aeronautics. The project was coordinated by Alenia and involved partners from major European Aircraft and Helicopter manufactures as well as research institutions and universities. The project was in support of EU policies on energy and environment, in addition to those on transport, economic and social cohesion, industry and, of course, research and technology.
    The overall objective of Advanced Design concepts and Maintenance by Integrated risk Evaluation… More >

  • Open Access

    ARTICLE

    On Fatigue Damage Computation in Random Loadings with Threshold Level and Mean Value Influence

    D. Benasciutti1, R. Tovo1

    Structural Durability & Health Monitoring, Vol.2, No.3, pp. 149-164, 2006, DOI:10.3970/sdhm.2006.002.149

    Abstract The probability density functions used to characterize the distribution of fatigue cycles in random loads are usually defined over an infinite domain. This means that they give a non-zero probability to count cycles with an infinitely large peak or valley, which however seems of less physical sense. Moreover, practically all the methods existing in the literature completely neglect the negative effect on fatigue strength produced by fatigue cycles with positive mean values. With theses premises, this work tries to further extending the probabilistic theory used by the frequency-domain methods by addressing to distinct problems. First,… More >

  • Open Access

    ARTICLE

    Aircraft Structural Integrity Assessment through Computational Intelligence Techniques

    RamanaM. Pidaparti1

    Structural Durability & Health Monitoring, Vol.2, No.3, pp. 131-148, 2006, DOI:10.3970/sdhm.2006.002.131

    Abstract This paper provides an overview of the computational intelligence methods developed for the structural integrity assessment of aging aircraft structures. Computational intelligence techniques reviewed include artificial neural networks, inverse neural network mapping, wavelet based image processing methods, genetic algorithms, spectral element methods, and particle swarm optimization. Multi-site damage, corrosion, and corrosion-fatigue damage in aging aircraft is specifically discussed. Results obtained from selected computational intelligence methods are presented and compared to the existing alternate solutions and experimental data. The results presented illustrate the applicability of computational intelligence methods for assessing the structural integrity of aging aircraft More >

  • Open Access

    ARTICLE

    Advanced analysis of uncertain cracked structures

    P. Bocchini, C. Gentilini, F. Ubertini, E. Viola1

    Structural Durability & Health Monitoring, Vol.2, No.2, pp. 109-122, 2006, DOI:10.3970/sdhm.2006.002.109

    Abstract This paper provides a simple and reliable method for the probabilistic characterization of the linear elastic response of frame structures with edge cracks of uncertain depth and location. A statistical analysis of the structural response allows consideration of the reliability of the investigated structure. A numerical example provides an indication of the performance of the approach proposed. More >

  • Open Access

    ARTICLE

    Failure Load of Frp Strengthened Masonry Walls: Experimental Results and Numerical Models

    G. Milani1, T. Rotunno2, E. Sacco3, A. Tralli1,4

    Structural Durability & Health Monitoring, Vol.2, No.1, pp. 29-50, 2006, DOI:10.3970/sdhm.2006.002.029

    Abstract Aim of the present work is the evaluation of the ultimate load bearing capacity of masonry panels reinforced with FRP strips. The investigation is developed performing both experimental and numerical studies. In particular, several panels subjected to different loading conditions are tested in the Tests Laboratory of the University of Florence (Italy). Then, numerical models based on combined homogenization and limit analysis techniques are proposed. The results obtained by numerical simulations are compared with experimental data. The good agreement obtained shows that the proposed numerical model can be applied for the evaluation of the ultimate More >

  • Open Access

    ARTICLE

    The Effect of Biophysical Stimulation on Cartilage Repair with Osteochondral Autograft

    S. Setti1, M. Fini2, F. Benazzo3, R. Cadossi1

    Molecular & Cellular Biomechanics, Vol.3, No.4, pp. 241-242, 2006, DOI:10.32604/mcb.2006.003.241

    Abstract This article has no abstract. More >

  • Open Access

    ARTICLE

    Developmental Paradigms and Cell-Based Approaches for Fracture Repair

    R. S. Tuan1

    Molecular & Cellular Biomechanics, Vol.3, No.4, pp. 229-230, 2006, DOI:10.32604/mcb.2006.003.229

    Abstract This article has no abstract. More >

  • Open Access

    ARTICLE

    The Effects of Cyclic Strains on the Hybrid Aligned Nanofibrous Scaffold Seeded with Smooth Muscle Cells

    J. W. Shin1,3, Y. J. Kim2, J. H. Kim1, Y. J. Lee3, S. J. Heo3, Y. M. Hwang1,3, D. H. Kim1,3, J. W. Shin1,3*

    Molecular & Cellular Biomechanics, Vol.3, No.4, pp. 223-224, 2006, DOI:10.32604/mcb.2006.003.223

    Abstract This article has no abstract. More >

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