Abstract We introduce a computationally efficient variant of the model-based ensemble Kalman filter (EnKF). propose two changes to original formulation. First, we phrase setup in terms precision matrices instead covariance matrices, and new prior for matrix which ensures it be sparse. Second, split state vector into several blocks formulate an approximate updating procedure each these blocks. s...

The origin of the diffuse interstellar bands (DIBs), one of the longest-standing mysteries of the interstellar medium (ISM), is explored within the framework of The Heterogeneous dust Evolution Model for Interstellar Solids (THEMIS). The likely nature of the DIB carriers and their evolution is here explored within the framework of the structures and sub-structures inherent to doped hydrogenated...

Two-point Feynman parameter integrals, with at most one mass and containing local operator insertions in 4+ ε-dimensional Minkowski space, can be transformed to multi-integrals or multisums over hyperexponential and/or hypergeometric functions depending on a discrete parameter n. Given such a specific representation, we utilize an enhanced version of the multivariate Almkvist–Zeilberger algorit...

Asbtract This paper elaborates on an FPA approach of EFP and on the added value of certain social constructivist approaches relying on discourse analysis. While discourse analysis has sometimes been presented as competing with traditional approaches of FPA, both can also be seen as complementary, we will draw on a revised FPA framework (White, 2001) and highlight how a discourse analysis approa...

In this paper we investigate the use of active coated nanoparticles (CNPs) for nano-sensing applications. Simulation results of the optical properties of an active CNP with a 24nm radius active silica core and 6nm thick plasmonic shell made of silver that has been functionalized by an additional spherical outer layer of varying thickness and refractive index are presented. In particular, the ef...

An agent based system (HOOFS) has been developed in order to examine the interactions between foraging animals and a spatially explicit description of the environment, including vegetation growth processes. HOOFS makes use of the agent-based approach to develop a model of foraging in which animal decision making processes are explicitly modelled. The model has evolved from one where foraging de...

Incomplete combustion of carbon based materials produces fine, carbon rich particles. Controlled manufacturing of very pure carbon nanoparticles (Carbon Black) can be achieved by, for example, thermal decomposition of gaseous precursors like acetylene and methane. Molecular dynamics simulations of hydrocarbon growth after non-catalyzed thermal decomposition of methane were carried out in order ...

We report a technique which allows self-assembly of conducting nanoparticles into long continuous chains. Transport properties of such chains have been studied at low temperatures. At low bias voltages, the charges are pinned and the chain resistance is exponentially high. Above a certain threshold VT , the system enters a conducting state. The threshold voltage is much bigger than the Coulomb ...

The uniform mesoporous carbon nanoparticles (MCNs) with size below 200 nm and good water dispersibility were successfully synthesized via a combined hydrothermal synthesis and hard templating. The prepared MCNs served as effective carriers for camptothecin which efficiently inhibited the growth of MCF-7 cancer cells after its sustained release therein.