The process of size segregation in a model system of granular matter, consisting of 1600 spherical poly-disperse particles stirred by a rectangular bar moving periodically in the horizontal direction, was modelled by the discrete element method under different values of dynamic friction coefficient of the particle material. It has been shown that the dynamic friction coefficient influences the ...

A mixture model of Gaussian copulas is proposed to cluster mixed data. This approach allows to straightforwardly define simple multivariate intra-class dependency models while preserving classical distributions for the one-dimensional margins of each component in order to facilitate the model interpretation. Moreover, the intra-class dependencies are taken into account by the Gaussian copulas w...

Fig.1 The peculiar behaviour of ADC and T2* measured values in the calcaneus spongy bone as function of Marrow fat content percentage (Mfc%). Their linear correlations (R coefficient), and their functional linear dependency y(x) are also showed. Blue diamonds indicate Healthy subjects, green squares indicate Osteopenic subjects and red triangles indicate Osteoporotic ones. MR Multi-parametric a...

The efficiency scores generated by DEA (Data Envelopment Analysis) models are clearly dependent on each other in the statistical sense. However, this dependency has been ignored in all published uses of these scores when used to make statistical inferences. For example, regression analysis has been widely applied to the analysis of the variation of the DEA efficiency scores. However, the conven...

In the present work an experimental investigation was conducted to obtain a correlation for the determination of convective heat transfer coefficients of stirred yoghurt in a plate heat exchanger. A rheological study was carried out in order to characterise the stirred yoghurt flow behaviour, evaluating its dependency both on shear rate and temperature. A shift in the temperature dependency was...

We study in detail the effect of different particle release times from sources on the cosmic-ray (CR) spectrum below 10eV in the Galaxy. We discuss different possible forms of particle injection such as burst-like injection, continuous injection for a finite time, injection from a stationary source and energy dependent injection. When applied to the nearby known supernova remnants, we find that...

The aim of this paper is to study the impact of Stock returns volatility of reference entities on credit default swap rates using a new dataset from the Japanese market. The majority of empirical research suggests the inadequacy of multinormal distribution and then the failure of methods based on correlation for measuring the structure of dependency. Using a copula approach, we can model the di...

BACKGROUND Strain and strain rate have been proposed as tools to quantify regional myocardial function. One of the major pitfalls of the current methodology is its angle dependency. To overcome this problem, we have developed a new method for the estimation of strain, independent of angle. The aim of this study was to validate this new methodology in an experimental setting using sonomicrometry...

In order to better manage and monitor fluid flow and migration of chemicals in gas and liquid phases, a fundamental understanding and knowledge of the saturation dependency of permeability, diffusion and electrical conductivity in a porous medium is required. The initial fundamental formulations and recent research for characterization of transport properties in porous media are discussed. To i...

Previous research has indicated that the relationship between the interaural cross-correlation coefficient (IACC) of a narrow-band sound and its perceived auditory source width is dependent on its frequency. However, this dependency has not been investigated in sufficient detail for researchers to be able to properly model it in order to produce a perceptually relevant IACC-based model of audit...