In this paper, we explore the effect of particle shape angularity on the mechanical behavior of sheared granular packings. A first series of contact dynamics simulations is performed in 2D with regular polygons with an increasing number of sides ranging from 3 (triangles) to 60. Then, in order to approach “idealized” angular particles, a second series of simulations is performed in 3D with irre...

Soils are particulate materials. Grain size determines the balance between particle-level forces (skeletal, weight, van der Walls attraction, double layer repulsion, capillary and viscous drag Figure 1). Grain size distribution establishes the range of possible particle packing configurations. And, particle shape (i.e., sphericity, angularity and roughness) defines particle interactions, such a...

The size, shape, gradation and appearance of aggregate have a significant impact on the road performance asphalt mixtures, which is directly related to deformation characteristics fatigue resistance mixtures. In order be able design long-life pavement, must reasonable morphology morphological characteristics. quantitatively analyze shape coarse aggregate, high-precision three-dimensional scanne...

Background: A frameless stereotactic robot-assisted system allows stereoelectroencephalography (SEEG) electrodes to span multiple lobes. As the angularity and length are increased, maintaining accuracy of becomes more challenging. The goal this study was analyze factors that influence multilobe-spanning SEEG inserted using a system.

Genetic correlations between longevity and conformation traits were estimated using data on Czech Holstein cows first calved in the years 1993–2008. Longevity traits considered were length of productive life and number of lactations initiated and their functional equivalents (i.e. the longevity traits corrected for milk production). Conformation traits were twenty one linear descriptive type tr...

Motivated by the challenging formation stabilization problem for mobile robotic teams wherein no distance or relative position measurements are available but each robot can only measure some of angles with respect to its neighbors in local coordinate frame, we develop notion “angle rigidity” a multipoint framework, named “angularity”, consisting set nodes embedded Euclidean space, and angle con...

The researches were conducted in the aspect of studying problem dairy cows lifetime depending on linear traits assessment conformation type. By classification method estimated firstborn Ukrainian Black-and-White (UBWD) and Holstein (H) breeds. Descriptive that characterize overall body structure studied: chest width, depth, angularity, condition, rear width position. According to research resul...