The change of signature of a metric is explained using simple examples and methods. The Klein-Gordon field on a signature-changing background is discussed, and it is shown how the approach of Dray et al. can be corrected to ensure that the KleinGordon equation holds. Isotropic cosmologies are discussed, and it is shown how the approach of Ellis et al. can be corrected to ensure that the Einstei...

Dissipative zones buildings, in which plastic hinges or strains occur during, for instance, seismic episodes, have been studied many different types of steel fuse elements. Stainless (SS), has attracted attention this regard due to its high ductility and further studies are needed determine performance usefulness as fuses. The use SS the construction industry represented an advance already know...

The present study considers an elastic-plastic contact analysis during loading-unloading of a deformable sphere with a rigid flat using finite element method. The effect of strain hardening on the contact behavior of a nonadhesive frictionless elastic-plastic contact is analyzed using commercial finite element software ANSYS. To study the strain hardening effect different values of tangent modu...

In a three-dimensional transient simulation of the elastic–plastic rolling contact, effects can be observed at beginning until stationary state is reached after for length several times contact radius. most cases, steady-state regime in focus scientific investigations, whereas are hardly considered. present work, those frictionless rigid sphere on an plane studied detail. The analysis limited t...

To identify genes involved in stress resistance and heat hardening, replicate lines of Drosophila melanogaster were selected for increased resistance to knockdown by a 39 degrees heat stress. Two selective regimes were used, one with and one without prior hardening. Mean knockdown times were increased from approximately 5 min to > 20 min after 18 generations. Initial realized heritabilities wer...

Stem cold hardening developed to different levels in citrus types tested in controlled environments. Exotherms indicated ice spread was more uniform and rapid in unhardened than in cold-hardened stems. All attempts to inhibit the functioning of citrus leaves resulted in less cold hardening in the stems. Citrus leaves contribute a major portion of cold hardening in the wood.

A new class of systems of strongly singular integrodifferential equations is examined, which emerges in the study of the bridged interface crack growth, e.g., in fiber stitched layered composites. This work generalizes the asymptotic analysis of strongly singular integral equations by Willis and Nemat-Nasser [Quart. Appl. Math., 48 (1990), pp. 741–753]. Singular perturbation solutions up to the...

PURPOSE To compare computed tomography (CT) number measurement consistency under different beam hardening conditions in phantom experiment between dual-energy spectral CT and conventional CT imaging. MATERIALS AND METHODS A phantom with 8 cells in periphery region and 1 cell in central region were used. The 8 conditioning tubes in the periphery region were filled with 1 of the 3 iodine soluti...

Modelling dislocation glide over the initial part of a stress–strain curve metals received little attention up to now. However, is essential ones understanding fundamental relationship between inelastic deformation and evolution network structure. Therefore, we present model dislocation-driven under static loading conditions. We reproduce repeated cyclic uniaxial tensile tests on Interstitial-F...

Modelling and simulation are important tools during design development processes. For accurate predictions of, e.g. manufacturing processes or final product performance, reliable material data is needed. Usually, the applied models calibrated by utilising direct methods such as conventional uniaxial tensile/compression tests but also inverse occasionally applied. Recently, an effective method, ...