Stochastic particle packing with specified granulometry and porosity

This work presents a technique for particle size generation and placement in arbitrary closed domains. Its main application is the simulation of granular media described by disks. Particle size generation is based on the statistical analysis of granulometric curves which are used as empirical cumulative distribution functions to sample from mixtures of uniform distributions. The desired porosity is attained by selecting a certain number of particles, and their placement is performed by a stochastic point process. We present an application analyzing different types of sand and clay, where we model the grain size with the gamma, lognormal, Weibull and hyperbolic distributions. The parameters from the resulting best fit are used to generate samples from the theoretical distribution, which are used for filling a finite-size area with non-overlapping disks deployed by a Simple Sequential Inhibition stochastic point process. Such filled areas are relevant as plausible inputs for assessing Discrete Element Method and similar techniques

Classifying organisational capabilities by their nature and role for technological capability

Based on critical literature review this research highlights a number of gaps in the existing treatment of technological and organisational capabilities. It has been recognised that organisational capabilities have an important role to play in development of technological capabilities both in latecomer and advanced companies. However, different studies focus on different organisational capabilities and prescribe them different importance. Further, despite the extensive research on organisational capabilities and a number of taxonomies of organisational capabilities, the literature review in this paper reveals that a classification highlighting different types of organisational capabilities by their nature and their role in development of technological capability is still absent. Further, studies often conflate technological and organisational capabilities, and adopt different units and levels of analysis and disaggregation. This study examines the above issues and develops a classification of organisational capabilities by their nature and their role in development of technological capability. In refining the interface between technological and organisational capabilities, this research disentangles the notion of organisational capabilities and introduces the notion of organisational capacity. Keywords:Innovation SystemsTechnology, Policy and Managemen