Stability of hexagonal solidification patterns

We investigate the dynamics of cellular solidification patterns using three-dimensional phase-field simulations. The cells can organize into stable hexagonal patterns or exhibit unsteady evolutions. We identify the relevant secondary instabilities of regular hexagonal arrays and find that the stability boundaries depend significantly on the strength of crystalline anisotropy. We also find multiplet states that can be reached by applying well-defined perturbations to a pre-existing hexagonal array.Comment: Minor changes, mainly in introduction and conclusion, one reference adde

Analysis of the První obalová spol. s.r.o. Company Using Statistical Methods

Bakalářská práce se zabývá ekonomickou analýzou firmy První obalová spol. s r.o., následně pomocí statistických metod provádí analýzu vybraných ekonomických ukazatelů a předvídá jejich budoucí vývoj, ze kterého čerpá cenné informace, které slouží k doporučeným návrhům na zlepšení ekonomické situace firmy.This bachelor´s thesis is dealing with economic analysis of a company called První obalová spol. s r.o. and consequently is examining through statistical methods these economic indicators and consequently is forecasting its future development from which is gathering valuable information which are serving to recommended proposals to improvement of economic situation of this company.

Implementation of ISMS in the Commercial Company

Tato diplomová práce se zabývá zavedením systému řízení bezpečnosti informací v obchodní společnosti. Shrnuje teoretické podklady v této problematice a využívá je pro analýzu současného stavu bezpečnosti informací, dále pro analýzu a řízení rizik a v neposlední řadě také pro vlastní zavedení ISMS v konkrétním podniku. Tato práce také obsahuje tři skupiny opatření, která snižují dopad identifikovaných rizik a která také zavádějí nezbytné součásti ISMS.This master thesis deals with the implementation of information security management system in the company. It summarizes the theoretical background in this field and uses it to analyze the current state of information security, as well as analysis and risk management and not least the actual implementation of ISMS in the particular company. This work also contains three groups of measures that reduce the impact of identified risks and which also implements an essential parts of ISMS.

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Cílem je najít vhodné místo a řešení nové městské knihovny v Táboře. Potřeba vychází z nedostačující velikosti stávající budovy. Součástí práce je návrh nejbližšího okolí s vazbou na knihovnu.The aim is to find a suitable location and solution for a new municipal library in Tábor. The need is based on the insufficient size of the existing building. The work includes a design of the immediate surroundings with a link to the library

Pulsed electric field in combination with vacuum impregnation with trehalose improves the freezing tolerance of spinach leaves

Pulsed electric fields in combination with vacuum infusion have been utilized to impregnate cells with trehalose, aiming at substantially improving the freezing tolerance of spinach leaves. Spinach samples were first treated with ten trains of bi-polar, rectangular electric field pulses with a nominal electric field strength of 580 V/cm and immediately immersed in a 40% (w/w) solution of trehalose under vacuum for 20 min. The samples were kept in the trehalose solution for 2.5 h at atmospheric pressure, immersed in deionised water at 4 ºC overnight, frozen in liquid nitrogen and thawed in water at room temperature. The leaves were evaluated for cell damage with microscopic observations and wilting tests. The results provided evidence that the impregnation with trehalose by the combined actions of electric fields and vacuum impregnation drastically improved the freezing tolerance of the spinach leaves

Effect of pulsed electric fields on the germination of barley seeds

[Excerpt] Introduction: There is only little information available in the literature about the effect of reversible electropermeabilization on plant cells and tissues. We here present a first exploration of the effect of pulsed electric fields (PEF) on barley seed germination. PEF is used as a physical means of stressing the seeds and affect their metabolism. [...]info:eu-repo/semantics/publishedVersio