Características mecánicas del mármol de Gualba (Barcelona) bajo comprensión uniaxial

The mechanical strength of Gualba marble (Barcelona, Spain), under compressive stresses is determined. Experimen- tal results appear to be very low, mean value 391 kg/cma (5.560 psi), compared with those shown by some other mar- bles : 500-700 kg/cma, (7.000-10.000 psi). The nature of the experimental failure of this rock is ana- lized

Coping with Persistent Pain, Effectiveness Research into Self-management (COPERS): statistical analysis plan for a randomised controlled trial

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated

Some integrals useful in probabilistic seismic hazard analysis

Abstract Closed-form solutions are presented for three simple cases of probabilistic seismic hazard analysis: (1) point source with deterministic median attenuation relation, (2) point source with probabilistic attenuation relation, and (3) a circular source with probabilistic attenuation relation. These solutions are obtained for commonly used models of magnitude exceedance rates and attenuation relations. Although the expressions presented correspond to simple cases, rarely found in real applications, they are believed to be useful as canonical cases against which to calibrate the numerical codes or as the basis to construct quadrature formulas for more complex cases

Tissue biochemical diversity of 20 gooseberry cultivars and the effect of ethylene supplementation on postharvest life

The European gooseberry (Ribes uva-crispa) is still an understudied crop with limited data available on its biochemical profile and postharvest life. A variety of polyphenols were detected in the skin and flesh of 20 gooseberry cvs, representing mainly flavonol glycosides, anthocyanins and flavan-3-ols. In contrast, gooseberry seeds were for the first time characterised by the presence of considerable amounts of hydroxycinnamic acid glycosides tentatively identified by UPLC-QToF/MS. All cvs examined represented a good source of vitamin C while being low in sugar. Furthermore, the postharvest stability of bioactives was explored by supplementation of exogenous ethylene in air at 5 °C. Results suggest a low sensitivity of gooseberries to ethylene. The overall quality of gooseberries remained stable over two weeks, showing potential for extended bioactive life

Use and extension of count data models in the determination of relevant factors for claims in the automobile insurance sector

Using real, Spanish data, different specifications of zero-inflated models are provided in this paper to estimate the number of accidents declared by policyholders. These count data models seem to be the most appropriate solutions to study this question. Our work is completed with the estimations of the number of clients that do not declare their actual accidents and the number of these accidents. The analysis of all these factors could become useful for insurers to improve their efficiency. We conclude with a final theoretical discussion on the possible advantages given by other alternative models, like the so-called thinned models.peer-reviewe

An Analysis of Spanish Accidents in Automobile Insurance: The Use of the Probit Model and the Theoretical Potential of Other Econometric Tools

Automobile insurance is one of the main pillars of the entire insurance industry in the developed economies. Knowing as much as possible about the factors related to the accidents is an essential issue for the insurance companies so that they may improve their levels of efficiency. Therefore, in this paper we focus on studying the most relevant variables that help explain the registration of claims in the automobile insurance sector. For this purpose, we fit a probit model specification using a database from a Spanish insurance company. Our research points out the significance of certain variables, such as the policyholders’ driving experience, their region of residence as well as their levels of insurance coverage, towards the likelihood of registering an insurance claim. However, probit analysis represents only one of the multiple perspectives which we can consider to examine the question of accidents and their reporting. Very briefly, we also discuss the utility of zero-inflated count data models to study the number of accidents declared by policyholders. Finally, we point out the possibilities that thinned models could offer for this type of research