Analysys of magnetic field homogenity at computer tomography

Práce se zabývá nukleární magnetickou rezonancí, jejími zobrazovacími technikami, měřením magnetické indukce a posouzením homogenity magnetického pole pomocí měřící sondy. Je zde uveden základní fyzikální popis chování spinu v magnetickém poli. Dále jsou popsány metody pro měření NMR. Práce je zaměřena na metody spinového a gradientního echa. V experimentální části je popsáno měření homogenity magnetického pole v tomografu a následné zobrazení mapy měřeného pole. Uživatelská aplikace, vytvořená v rámci práce, má za úkol více usnadnit práci se zobrazování magnetických polí.The dissertation deals with nuclear magnetic resonance, its projection technologies, measurement of magnetic induction and evaluation of magnetic field homogenity by the help of measuring probe. Further, the methods of NMR measurements are being described. The dissertation concentrates on methods of spin and gradient echo. The experimental part describes measurement of magnetic field homogenity in tomography and subsequent projection of measured field map. Users application, created in terms of dissertation, has more save labour imagery magnetic fields.

Non-gradable Adjectives in Latin

Institute for Greek and Latin StudiesÚstav řeckých a latinských studiíFaculty of ArtsFilozofická fakult

Simulation of the RF Transmission Channel for the DVB-H and DVB-SH

Projekt je zaměřen na popis DVB vysílání pro mobilní zařízení. Popisuje standard DVB-H, který je založen na DVB-T a využívá jeho přenosovou infrastrukturu. Standard DVB-SH je hybridní systém, který přidává k pozemnímu přenosu satelitní spojení. Signály se mohou šířit různými prostředími, proto jsou definovány modely přenosových kanálů s danými parametry. Simulace přenosu v obou standardech probíhá v uživatelské aplikaci vytvořené v programu MATLAB a v závěru práce jsou vyhodnocený získané výsledky.Project is focused on description DVB broadcasting for hand-held’s. It describes standard DVB-H that is founded on DVB-T and uses its transmission infrastructure. Standard DVB-SH is a hybrid system that adds to terrestrial broadcasting satellite connection. Signal can extend by various environments, therefore it are defined models transmission channel with defined parameters. Simulation of the transmission in both channel are realized in user application created in MATLAB. Finally, obtained results are evaluated and discussed.

Crisis and terrorism

Práce přibližuje význam právní úpravy na úseku krizové legislativy. Hlavní část práce je zaměřena na analýzu hlavních složek IZS působících a rizikových objektů na území okresu Trutnov (NUTS IV). Jsou zde popsány změny systému krizového řízení po 1.1. 2003. Dále je zde navržena obecná metodika hodnocení rizikovosti objektů.Ústav ekonomieDokončená práce s úspěšnou obhajobo

Analysis of Behavioural Profiles of Iterative Verbs in Latin

This thesis deals with the group of Latin iterative verbs, i.e. the group that is formally marked with the iterative suffix -t. It deals with the question what was the actual meaning of the iterative suffix -t in classical Latin as reference literature says that in some cases the meaning of iterative verbs in classical Latin was the same as that of the base verb and there are iterative verbs whose base verbs are not attested at all. Also, only iterative verbs often passed into Romance languages. Another question this thesis deals with is the relationship of iterative verbs as a group set off on the basis of the category of aktionsart as it is understood in the Czech linguistic tradition and the categories that are generally referred to as aspect (grammatical aspect, lexical aspect). In this case, the selected method is a corpus-based quantitative method called the "behavioural profiles". In our case, the corpus is limited to selected prosaic works of the classical Latin period of approximately the 1st century b.C. to the 1st century AD. In its first part, the analysis is based on studying the occurrences of selected iterative verb - base verb pairs in the above mentioned corpus, especially focused on the frequency of occurrence, valence and classification of predicates into Vendler's classes,..

Non-gradable Adjectives in Latin

Institute for Greek and Latin StudiesÚstav řeckých a latinských studiíFaculty of ArtsFilozofická fakult

The Potential of Widespread UAV Cameras in the Identification of Conifers and the Delineation of Their Crowns

With the ever-improving advances in computer vision and Earth observation capabilities, Unmanned Aerial Vehicles (UAVs) allow extensive forest inventory and the description of stand structure indirectly. We performed several flights with different UAVs and popular sensors over two sites with coniferous forests of various ages and flight levels using the custom settings preset by solution suppliers. The data were processed using image-matching techniques, yielding digital surface models, which were further analyzed using the lidR package in R. Consumer-grade RGB cameras were consistently more successful in the identification of individual trees at all of the flight levels (84–77% for Phantom 4), compared to the success of multispectral cameras, which decreased with higher flight levels and smaller crowns (77–54% for RedEdge-M). Regarding the accuracy of the measured crown diameters, RGB cameras yielded satisfactory results (Mean Absolute Error—MAE of 0.79–0.99 m and 0.88–1.16 m for Phantom 4 and Zenmuse X5S, respectively); multispectral cameras overestimated the height, especially in the full-grown forests (MAE = 1.26–1.77 m). We conclude that widely used low-cost RGB cameras yield very satisfactory results for the description of the structural forest information at a 150 m flight altitude. When (multi)spectral information is needed, we recommend reducing the flight level to 100 m in order to acquire sufficient structural forest information. The study contributes to the current knowledge by directly comparing widely used consumer-grade UAV cameras and providing a clear elementary workflow for inexperienced users, thus helping entry-level users with the initial steps and supporting the usability of such data in practice

Basic Analysis of the Cerebrospinal Fluid: An Important Framework for Laboratory Diagnostics of the Impairment of the Central Nervous System

Laboratory analysis of basic cerebrospinal fluid (CSF) parameters is considered as essential for any CSF evaluation. It can provide rapidly very valuable information about the status of the central nervous system (CNS). Our retrospective study evaluated parameters of basic CSF analysis in cases of either infectious or non-infectious CNS involvement. Neutrophils are effector cells of innate immunity. Predominance of neutrophils was found in 98.2% of patients with purulent inflammation in CNS. Lymphocytes are cellular substrate of adaptive immunity. We found their predominance in 94.8% of patients with multiple sclerosis (MS), 66.7% of patients with tick-borne encephalitis (TBE), 92.2% of patients with neuroborreliosis, 83.3% of patients with inflammatory response with oxidative burst of macrophages in CNS and 75.0% of patients with malignant infiltration of meninges (MIM). The simultaneous assessment of aerobic and anaerobic metabolism in CSF using the coefficient of energy balance (KEB) allows us to specify the type of inflammation in CNS. We found predominantly aerobic metabolism (KEB > 28.0) in 100.0% CSF of patients with normal CSF findings and in 92.8% CSF of patients with MS. Predominant faintly anaerobic metabolism (28.0 > KEB > 20.0) in CSF was found in 71.8% patients with TBE and in 64.7% patients with neuroborreliosis. Strong anaerobic metabolism (KEB < 10.0) was found in the CSF of 99.1% patients with purulent inflammation, 100.0% patients with inflammatory response with oxidative burst of macrophages and in 80.6% patients with MIM. Joint evaluation of basic CSF parameters provides sufficient information about the immune response in the CSF compartment for rapid and reliable diagnosis of CNS involvement