Mechanicky indukované premeny kremíka V práci sa študujú zmeny veľkosti častíc a štruktúry kremíka pri vibračnom a planetárnom mletí vo vzduchu a v kvapalinách rôznej permitivity (metanol, acetón a benzén). Kinetika redukcie veľkosti častíc a zmien štruktúry závisí od relatívneho zrýchlenia pohybu mlecích telies a od povahy mlecieho prostredia. Najefektívnejšie zjemnenie a ochrana povrchu prášk...

In this paper, we propose a generalized version of the Rashmi-Shah-Kumar Minimum-Storage-Regenerating(RSKMSR) codes based on the product-matrix framework. For any (n, k, d) such that d ≥ 2k − 2 and d ≤ n − 1, we can directly construct an (n, k, d) MSR code without constructing a larger MSR code and shortening of the larger MSR code. As a result, the size of a finite field over which the propose...

We describe the nearly quantitative preparation of phosphorus ylides and the Wittig reaction occurring in the solid sate during high-energy mechanochemical processing. Initial insights into the details of the discovered chemical transformations indicate that high-energy mechanical processing supports the interaction of reacting centers by breaking crystallinity of the reactants and by providing...

Stress-induced reproductive dysfunction is a relatively common cause of infertility in women. In response to everyday life stress, some individuals readily develop reproductive dysfunction (i.e., they are stress sensitive), whereas others are more stress resilient. Female cynomolgus monkeys, when exposed to mild combined psychosocial and metabolic stress (change in social environment + 20% redu...