We analyze a self-consistent theory of crack growth controlled by a cumulative damage variable d(t) dependent on stress history, in the quasistatic regime where the sound wave velocity is taken as infinite. Depending upon the damage exponent m, which controls the rate of damage dd/dt~sigma(m) as a function of local stress sigma, we find two regimes. For 0<m<2, the model predicts a finite-time s...

elham ahmadi   agricultural zoology research department, iranian research institute of plant protection, tehran, iran       received: 16 november 2010 accepted: 21 april 2011     *corresponding author: email: [email protected]       abstract     one of the effective managing methods for slugs control is cultural method. a field study on the effect of different irrigation times on slug (agriol...

in this paper, the capabilities of displacement curvature derived from static response data for finding the location and severity of damage in euler-bernoulli beams are assessed. static response of a beam is obtained using the finite element modeling. in order to reduce the number of measured nodal displacements, the beam deflection is fitted through a polynomial function using a limited number...

Unlike for the instrument of hazard zone maps for surface waters, there is no common approach for the calculation of inundation risk caused by spontaneous overland runoff. For being able to assess the associated potential damage, the maximum inundation depth is being calculated via an extended 2D flow model, based on a rain event with an 100-year return period and a duration of 60 minutes. The ...

Despite exciting progress in the field of neuro-protection, lowering the intraocular pressure is still the only available option to treat glaucoma patients. The level to which the intraocular pressure should be lowered is different for each individual patient. The formula proposed to calculate the "target pressure" takes into account the pressure at which the glaucomatous damage presumably occu...

A new parametric model for the econometric analysis of non-negative integers is proposed. Its distinguishing feature is that it allows for more flexible variance-mean relationships than the models used hitherto. Estimation with maximum likelihood is illustrated using a dataset on ship damage incidents. A New Approach for Modeling Economic Count Data Forthcoming: Economics Letters Rainer Winkelm...

The Mitochondrial Free Radical Theory of Aging (MFRTA) proposes that mitochondrial free radicals, produced as by-products during normal metabolism, cause oxidative damage. According to MFRTA, the accumulation of this oxidative damage is the main driving force in the aging process. Although widely accepted, this theory remains unproven, because the evidence supporting it is largely correlative. ...

In this study static and fatigue behaviours of honeycomb sandwich composites, made of aramide fibres and aluminium cores, are investigated through four-point bending tests. Damage and failure modes are reported and discussed. Global and local parameters were considered to evaluate the fatigue life of the analysed sandwich composites. Effects of core densities and the cell orientation (L or W) o...

This study models net welfare impacts on producers who receive utility from on-farm wildlife populations that are not costlessly disposable. Wildlife damage levels where net benefits are zero indicate producers' maximum willingness to pay for on-farm wildlife. An empirical model is developed. Results for Ontario producers suggest the net welfare loss from damage is approximately half of the val...

This paper presents a measurement system design methodology that incorporates damage scenarios. One of the goals of a measurement system is to detect damage for safety and for management of maintenance activities. This study builds upon previous research at EPFL in the area of model based diagnosis. An existing bridge in Switzerland is used to illustrate how damage scenarios are identified and ...