Possible hardware-based solutions leading to cognitive computing

The hardware emulation of stochastic invertible logic based on Arduino microcontrollers or implemented in magnetic tunnel junctions, the hardware belief networks, have been proposed recently by researchers from the School of Electrical and Computer Engineering, Purdue University (IN), USA. Importantly, the provided solutions realize not only standard stochastic computing of the Boolean type, but do it very precisely and in the invertible manner. The proposed computing network imitating synapses consists of elementary switches based on stochastic magnetic tunnel junctions.

Production parameters for carbon nanofibers

Polyacrylonitrile (PAN) is the most often used material for carbon fiber production. Carbon nanofibers, however, created from electrospun PAN nanofibers, necessitate different production parameters during stabilization and carbonization steps. Investigation of these parameters can be performed by various optical, chemical and other examinations, e.g. of the sample color (with increasing stabilization, samples get darker and darker), using FTIR, DSC, TGA, and other techniques.

Complexity and emergence of cognition

With the development of cognitive computing the next generation of future computing paradigms will be related to interesting issue of emergence of the new functionalities that results from increasing complexity of systems. The fundamental question is; at what level of complexity, and why at that level, a given functionality is accessible? And, an another specific question can be asked; is there the need to make observation in time or conclusion about the specific functionality can be extracted from the static, read at one moment, information?

Increasing biocompatibility of titanium bone implants

Bone implants are usually prepared from titanium which is biocompatible and highly resilient, but differs from bone tissue with respect to Young's modulus, resulting in possible scaffold loosening under stress. A porous geometry as well as the addition of growth factors can support adjusting the Young's modulus for an adapted scaffold-shaped geometry.

High symmetry gadolinium(III) polyhedra

In a recent article, creation of hollow nanospheres Gd20, Gd32, Gd50 and Gd60 is described using the approach to assemble fragments containing different polygons. While structural analysis revealed the symmetries of the respective nanospheres, magnetic studies show in theory and experiment that these polyhedra show antiferromagnetic interaction which can be attributed to classical spins at the Gd sites. Magnetic measurements can even be used as "fingerprints" to identify the polyhedra.

Magpar for beginners - a tutorial

Installation of parallel-computing Magpar micromagnetic simulator is a very challenging task for all interested physicists, and scientists in general, for whom computer science experience is from natural reasons very poor, especially within Unix-like systems. In the following report the reader can find step-by-step information how to install Magpar in Linux-based system. Since Magpar was issued in 2010, many details about location of files are not actual today.

New ideas for the New Year

The last months have been quite a busy time for the VIARAM team, with a lot of new publications in diverse areas of basic and applied research and some proposals for new projects.

In the new year, we will go on with micromagnetic simulations and experimental investigations of magnetic nano-structures, but also work on polymeric nanofiber mats with different physical and chemical properties, textile-based solar cells and batteries, and other interesting new materials and material combinations.

We wish you all the best for the New Year!