QRS Detection using Octant Theory

Cílem této diplomové práce je vytvoření algoritmu v programu Matlab R2014a pro detekci QRS komplexu na základě oktantové teorie. Jsou popsány možnosti snímání elektrokardiografických (EKG) a vektorkardiografických (VKG) svodů a přístupů k detekci QRS komplexů. Je vytvořen algoritmus pro filtrování dat, transformaci EKG svodů, detekci oktantových čísel, detekci QRS komplexu (Oktantový detektor) a detekci T vlny. Tento program je otestován na standardní databázi CSE. Je dosaženo senzitivity 99,08 % a pozitivní prediktivity 99,86 %.The aim of this thesis was to create an algorithm for QRS complex detection in Matlab software. It describes the sensing options of electrocardiographic and vectorcardiographic leads and different approaches to QRS detection. The main part of the work describes a design of an algorithm for filtration and transformation of ECG data, detection of octant numbers, QRS complex, and T wave. The introduced algorithm was tested on the standard CSE database. The performance of the algorithm was evaluated; it reached 99.08 % sensitivity, and 99.86 % positive predictivity.450 - Katedra kybernetiky a biomedicínského inženýrstvívýborn

Multifaceted activity of cytokinin in leaf development shapes its size and structure in Arabidopsis

The phytohormone cytokinin has been shown to affect many aspects of plant development ranging from the regulation of the shoot apical meristem to leaf senescence. However, some studies have reported contradictory effects of cytokinin on leaf physiology. Therefore cytokinin treatments cause both chlorosis and increased greening and both lead to decrease or increase in cell size. To elucidate this multifaceted role of cytokinin in leaf development, we have employed a system of temporal controls over the cytokinin pool and investigated the consequences of modulated cytokinin levels in the third leaf of Arabidopsis. We show that, at the cell proliferation phase, cytokinin is needed to maintain cell proliferation by blocking the transition to cell expansion and the onset of photosynthesis. Transcriptome profiling revealed regulation by cytokinin of a gene suite previously shown to affect cell proliferation and expansion and thereby a molecular mechanism by which cytokinin modulates a molecular network underlying the cellular responses. During the cell expansion phase, cytokinin stimulates cell expansion and differentiation. Consequently, a cytokinin excess at the cell expansion phase results in an increased leaf and rosette size fueled by higher cell expansion rate, yielding higher shoot biomass. Proteome profiling revealed the stimulation of primary metabolism by cytokinin, in line with an increased sugar content that is expected to increase turgor pressure, representing the driving force of cell expansion. Therefore, the developmental timing of cytokinin content fluctuations, together with a tight control of primary metabolism, is a key factor mediating transitions from cell proliferation to cell expansion in leaves

Non-cell autonomous and spatiotemporal signalling from a tissue organizer orchestrates root vascular development

During plant development, a precise balance of cytokinin is crucial for correct growth and patterning, but it remains unclear how this is achieved across different cell types and in the context of a growing organ. Here we show that in the root apical meristem, the TMO5/LHW complex increases active cytokinin levels via two cooperatively acting enzymes. By profiling the transcriptomic changes of increased cytokinin at single-cell level, we further show that this effect is counteracted by a tissue-specific increase in CYTOKININ OXIDASE 3 expression via direct activation of the mobile transcription factor SHORTROOT. In summary, we show that within the root meristem, xylem cells act as a local organizer of vascular development by non-autonomously regulating cytokinin levels in neighbouring procambium cells via sequential induction and repression modules

Competition Analysis for a Trading Company

Import 29/09/2010Práce pojednává o společnosti Bochemie a.s. působící v chemickém průmyslu. Cílem práce byla analýza konkurence v podmínkách obchodní společnosti. Celá práce je rozdělená do 6 kapitol. První kapitola je úvod. Druhá kapitola poskytuje teoretické informace o východiscích analýzy konkurence. Ve třetí kapitole se nachází charakteristika vybrané společnosti. Analýzou konkurence obchodní společnosti se zabývá čtvrtá kapitola. Tato kapitola je věnována Porterovu modelu a analýze trhu. Pátá kapitola navrhuje doporučení pro management společnosti. Poslední kapitola je závěr, která obsahuje konečné shrnutí celého výzkumu.The work tells about the company Bochemie corp operating in the chemical industry. Objective of the work was the analysis of the competitive in the Condition Trade Company. The whole work is divided into six chapters. The first charter is introduce. The second charter consists of the theoretical information about analysis of the competitive. In the third charter is characteristic of the selected company. Analysis of the competitive in the Condition Trade Company is object of the fourth chapter. This charter is devoted to the Porter's Five Forces Model and market analysis. The fifth charter proposes the recommends for management of company. The last charter is conclusion, where includes summary of whole research.Prezenční545 - Institut ekonomiky a systémů řízenívelmi dobř

Business Management and Taxes

The diploma thesis describes firstly a tax system in the Czech Republic from the theoretical point of view, secondly it describes an influence which it has on constractors (self employers), natural persons and also on legal entities. I have chosen a factual company on which I analyse the difference between the tax liability in the years 2007 and 2008, separatly on a value added tax (VAT), on a corporate income tax and on a tax all-in cost of the employees. To conclude, I mention a total incidence of taxes on surveyed companies and I evaluate its influence in the years 2007 and 2008

Analysing Some Personal Activities

Import 11/07/2012Diplomová práce je zaměřena na tři klíčové personální procesy. Jsou jimi získávání, výběr a následná adaptace zaměstnanců. Pro svou práci jsem si vybrala společnost Bochemie a.s., ve které budu tyto tři procesy analyzovat. Cílem práce je mimo samotné analýzy i návrh potřebných opatření pro zlepšení. Práce je rozdělena do čtyř částí. První z nich je charakteristika společnosti, v níž popisuji společnost, předmět její činnosti, politiku jakosti a vztah ke svým zaměstnancům. Druhá část je věnována teorii dané problematiky. Jsou zde uvedeny základní personalistické pojmy, důvody získávaní zaměstnanců, metody výběru a průběh adaptace. Třetí část je praktická, ve které jednotlivé procesy analyzuji. Poslední čtvrtá část stručně shrnuje dosažené poznatky a navrhuje opatření vedoucí k zlepšení.This thesis is aimed to a three crucial personnel processes. These are recruitment, selection and subsequent adaptation of the employees. The Bochemie a. s. Company was chosen for this thesis and mentioned processes were analysed there. The aim of the thesis is except analysis itself also proposition necessary arrangements for improvement. Thesis is divided to four parts. First of them is the characteristic of the company. Company itself, object of its activity, strategy of quality and the relations to the emloyees are mentioned there. Second part is devoted to the theory of stated issues. There are mentioned basic personalistic terms, the reasons for recruitment of the employees, the methods of selection and the progress of adaptation. The third part is practical and I analyse single processes there. The last part briefly summarize reached pieces of knowledge and suggests arrangements leading to an improvement.Prezenční545 - Institut ekonomiky a systémů řízenívýborn

Features Extraction in Vectorcardiography

Import 22/07/2015Cílem této bakalářské práce je vytvoření algoritmu v programu Matlab pro automatické zpracování vektorkardiografických záznamů. Jsou popsány možnosti snímání vektorkardiografických svodů a vybrány příznaky, které umožňují diagnostiku onemocnění srdce: maximální QRS vektor, maximální vzdálenost těžiště a QRS smyčky, obvod QRS smyčky, sklon srdeční osy a prostorový QRS-T úhel. Je vytvořen algoritmus pro filtrování dat, detekci významných bodů VKG svodů, určení průměrného srdečního cyklu a extrakci pěti příznaků. Tento program - VkgDetektor je dále otestován na syntetických a reálných datech. Průměrná relativní chyba u určení hodnot příznaků je -0,01183 % u určení vzdálenosti těžiště a 0,01399 % u určení obvodu QRS smyčky.The aim of this bachelor thesis is to create an automatically processing vectorcardiography algorithm in Matlab software. Sensing options vectorcardiographic leads and selected features that allow the diagnosis of heart diseases are described: QRS loop maximum vector magnitude, maximum distance between the QRS centroid and QRS loop, heart axis deviation, perimeter QRS loop and spatial QRS-T angle. The main part of the work describes the creation of algorithm for the filtration of ECG/VCG data, the detection of the significant points of the VCG leads and the extraction of five most significant features. The software is tested on real and synthetic signals. The average relative error for determining the value of maximum distance between the QRS centroid and QRS loop is -0,01183 % and that of perimeter QRS loop is 0,01399 %.450 - Katedra kybernetiky a biomedicínského inženýrstvívýborn

Voltammetric characterization of montmorillonite-based organo derivatives

Organo derivatives of clay mineral montmorillonite were prepared by modification of montmorillonite (type SAz-1) with three alkylammonium cations – hexadecyltrimethylammonium (HDTM), benzyldimethylhexadecylammonium (BDH), and hexadecylpyridinium bromide (HDP). The prepared organo-montmorillonites were characterized by X-Ray diffraction and infrared spectroscopy to test the alkylammonium cations presence in the organo derivatives. Multisweep cyclic voltammetry of copper at carbon paste electrodes modified with the organo-montmorillonites used to study their sorption properties has proved the sorption decrease in comparison with the unmodified montmorillonite. The obtained results correlate with the study performed by means of sorption isotherms

Characteristics of turion development in two aquatic carnivorous plants: Hormonal profiles, gas exchange and mineral nutrient content

Abstract Turions are vegetative, dormant, and storage overwintering organs formed in perennial aquatic plants in response to unfavorable ecological conditions and originate by extreme condensation of apical shoot segments. The contents of cytokinins, auxins, and abscisic acid were estimated in shoot apices of summer growing, rootless aquatic carnivorous plants, Aldrovanda vesiculosa and Utricularia australis, and in developing turions at three stages and full maturity to reveal hormonal patterns responsible for turion development. The hormones were analyzed in miniature turion samples using ultraperformance liquid chromatography coupled with triple quadrupole mass spectrometry. Photosynthetic measurements in young leaves also confirmed relatively high photosynthetic rates at later turion stages. The content of active cytokinin forms was almost stable in A. vesiculosa during turion development but markedly decreased in U. australis. In both species, auxin content culminated in the middle of turion development and then decreased again. The content of abscisic acid as the main inhibitory hormone was very low in growing plants in both species but rose greatly at first developmental stages and stayed very high in mature turions. The hormonal data indicate a great strength of developing turions within sink–source relationships and confirm the central role of abscisic acid in regulating the turion development