Mental models are cognitive structures, which are built to understand certain aspects of the real world. Planning and control of human activity are based on them (cf. Johnson-Laird 1980; Dutke 1994). Learning a computer application goes along with the development of appropriate mental models (Norman 1983; Dutke 1994). To support users in building up mental models, computer applications and thei...

An analysis is presented of the torsional vibration of a rigid disc embedded to the surface of a transversely isotropic elastic half space. By using Hankel transform the mixed boundary value problem transform into a dual integral equation, which then transform to a Fredholm integral equation. After reduction to a Fredholm’s integral equation of second kind, solutions to the problem are obtained...

This paper deal with a series of dynamic response analyses, carried out to give numerical correlation hysteretic behavior cast-in-place anchorages obtained by the static loading and shake table tests. Specimens for analyses are reinforced concrete rectangular blocks embedded headed anchors. Failure modes expected steel bolt failure cone failure, associated respective embedment depth. Initial fl...

The interaction of a building, its foundation and the underlying soils may have important effects on the behavior of each of these components as well as on the overall system behavior. For example, the relative stiffness of a building structure, its mat foundation and the soils that support the foundation will influence the stresses and displacements of both the structure and soil. Soil-structu...

Foundations of structures which are subjected to uplift loading require anchoring systems to resist pullout loads. Such anchors can be broadly classified as gravity anchors, pile anchors and plate anchors. Plate anchors can be circular, square or strip in shape. The loading applied on plate anchors can be vertical, inclined or horizontal depending on the anchor orientation. In this study, vario...

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This paper presents the state of development of a constructive simulation to better understand competency requirements in initiative based tactics in order to support training scenario design in a virtual training environment. The simulations of interest are cognitive models. The first section situates the development functions of understanding, training, and assisting human capabilities, in re...

Anchors are widely used in foundation systems for structures requiring uplift resistance. As demonstrated by numerous theoretical and experimental studies on the subject, uncertainty remains as to both the theoretical uplift capacity of anchors in idealised soils and the suitability of the various modelling assumptions in capturing the responses observed during tests. This study, which deals ex...