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  • 1
    Electronic Resource
    Electronic Resource
    Performance of low-order triangular elements during plastic flow (1999)
    Bradford : Emerald
    Engineering computations 16 (1999), S. 70-87 
    Details
    ISSN: 0264-4401
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Technology
    Notes: An important characteristic of many soil models is a volume change during plastic flow. In computations, this plastic volume change is expressed via a kinematic constraint on the possible deformations. Due to this constraint the plane-strain three-noded triangular element exhibits locking when plastic deformations occur, under dilatant, contractant and isochoric conditions. It is demonstrated that using the method of enhanced assumed strains by Simol this locking cannot be remedied. For six-noded wedges and four-noded and five-noded pyramids the same conclusion is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/02644409910251283
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  • 2
    Electronic Resource
    Electronic Resource
    Some observations on embedded discontinuity models (2001)
    Bradford : Emerald
    Engineering computations 18 (2001), S. 241-254 
    Details
    ISSN: 0264-4401
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Technology
    Notes: The formulation of finite elements with incompatible discontinuous modes is examined rigorously. Both weak and strong discontinuities are considered. Starting from a careful elaboration of the kinematics for both types of discontinuities a comprehensive finite element formulation is derived based on a three-field variational statement. Similarities and differences are highlighted between the various formulations which ensue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/02644400110365897
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  • 3
    Electronic Resource
    Electronic Resource
    Implicit integration of a generalized plasticity constitutive model for partially saturated soil (2001)
    Bradford : Emerald
    Engineering computations 18 (2001), S. 314-336 
    Details
    ISSN: 0264-4401
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Technology
    Notes: Extends the stress update algorithm and the tangent operator recently proposed for generalized plasticity by De Borst and Heeres to the case of partially saturated soils, where on top of the hydrostatic and deviatoric components of the (effective) stress tensor suction has to be considered as a third independent variable. The soil model used for the applications is the Bolzon-Schrefler-Zienkiewicz model, which is an extension of the Pastor-Zienkiewicz model to partial saturation. The algorithm is incorporated in a code for partially saturated soil dynamics. Back calculation of a saturation test and simulation of surface subsidence above an exploited gas reservoir demonstrate the advantage of the proposed algorithm in terms of iteration convergence of the solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/02644400110365941
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  • 4
    Electronic Resource
    Electronic Resource
    The application of surface generated interpolation models for the prediction of residential property values (2000)
    Bradford, West Yorkshire [u.a.] : Emerald
    Journal of property investment & finance 18 (2000), S. 162-176 
    Details
    ISSN: 1463-578X
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: The aim of this paper is to attempt to measure the effect of location on residential house prices and to endeavour to integrate spatial and aspatial data in terms of developing a hybrid predictive model. The research methodology investigates the traditional hedonic approach to modelling location using multiple regression techniques. Alternative approaches are considered which specifically model the spatial distribution of house prices with the objective of developing location adjustment factors. These approaches are based on the development of surface response techniques such as inverse distance weighting and universal kriging. The results generated from the surfaces created are then calibrated within MRA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/14635780010324321
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  • 5
    Electronic Resource
    Electronic Resource
    Interactive application of computer assisted mass appraisal and geographic information systems (1997)
    Bradford, West Yorkshire [u.a.] : Emerald
    Journal of property valuation & investment 15 (1997), S. 448-465 
    Details
    ISSN: 0960-2712
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Economics
    Notes: Provides an outline of research seeking to apply to computer assisted mass appraisal (CAMA) model capable of use within a geographic information system (GIS). The end product will be a working GIS/valuation integrated model. The model, in an operational context, can be utilized for property taxation purposes, to facilitate the rating and revaluation of residential properties in Northern Ireland. As the value of land and property is a function of economic, legal, physical and locational factors, consequently access to comprehensive, reliable and up-to-date transaction evidence is a prerequisite to property valuation. Valuation techniques depend on the collection and analysis of relevant data. Historically, the application of these techniques took place within a non-spatial environment. Ultimately, market data support any estimate of value. Data searches and collection can prove both time consuming and expensive in relation to the fee earning potential of a valuation report. GIS can facilitate, in a spatial and aspatial context, the storage, manipulation and analysis of data, in a fraction of the time previously required. Current techniques for the mass appraisal of property, and for the prediction of residential property values, can be enhanced by utilizing the data handling capacity of GIS. Integration of a mass appraisal model within a GIS will add value to the valuation process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/14635789710189227
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