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Effect of fertilizers application on grassland ecosystems: what can tell us long-term experiments?
Hejcman, Michal ; Suchara, Ivan (advisor) ; Hájek, Michal (referee) ; Poschlod, Peter (referee)
GENERAL CONCLUSIONS Benefit of all present papers for current stage of knowledge is directly obvious from their text. So, I will summarize the main benefit of each paper very briefly here. Chapter 2 - From the comparison of long-term vs short-term nutritional effects, it was concluded that long-term fertilizer experiments are irreplaceable as many existing models and predictions can be validated only by means of long-term manipulation of plant communities and their continuous observation and documentation. Chapter 3 - Long-term fertilizer application can create grasslands with no overlap of plant species composition in the scale of several meters. Species indicative of low productivity grasslands (short grasses, orchids, and sedges) can survive longterm nitrogen application if phosphorus is limiting nutrient for growth of highly productive grassland species. Chapter 4 - Long-term addition of limiting nutrient can affect grassland ecosystem in three ways: 1) by change in plant species composition without significant increase in total biomass production, 2) by no change in species composition but with significant increase in total biomass production, and 3) by substantial change in plant species composition accompanied by significant increase in total biomass production. Chapter 5 - Long-term fertilizer...
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Correlation between in vivo quantitative MR parameters in various tissues (MR spectroscopic imaging, MR diffusometry, MR relaxometry)
Wagnerová, Dita ; Hájek, Milan (advisor) ; Krššák, Martin (referee) ; Mechl, Marek (referee)
Coregistration of MR spectroscopic (SI), diffusion (DTI), relaxation images and their subsequent correlations based on pixel-by-pixel quantitative analysis have the potential to distinguish between pathological states and healthy tissue and therefore can help assessing brain pathology extent. Patients with brain tumours and temporal lobe epilepsy (TLE) were involved in the study to validate the use of this method in clinical practice. 30 patients with a new diagnosed brain lesion, 22 patients with a treated tumour (diagnosis assessed by histology or by radiological follow-up), 20 TLE patients and 59 healthy subjects were examined on a 3T system. The measurement protocol consisted of T2-weighted MR images, SI, DTI and T2 relaxometry. Correlations were analysed with the CORIMA programme with automatic identification of pixels in the normal tissue according to control data. Brain lesions: Specific correlation patterns between metabolites, MD and T2 relaxation times (T2) were found for a given lesion localisation and tumour type. The patterns depend on different tissue states involved in the examined area. Recurrent tumours exhibited the same patterns as untreated ones but with changed parameter values caused by therapy. Metabolic values did not correlate with MD and T2 in radiation necrosis. TLE: MR...
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Yugoslavian phantom identity
Nandi, Danijela ; Hájek, Martin (advisor) ; Spalová, Barbora (referee)
Výzkumné téma diplomové práce vychází z medicínského pojmu známého jako "fantomová bolest". Definice na webu Mayo Clinic uvádí, že "fantomová bolest je bolest, která je pociťována, jako by vycházela z části těla, která již neexistuje. Lékaři kdysi věřili, že tento post- amputační fenomén je psychologického rázu, v dnešní době nicméně odborníci mají za to, že jde o skutečné pocity pocházející z míchy a mozku. (Mayo Clinic, n.d.). Předkládaná práce zkoumá ideu "fantomové identity" konceptualizovanou jako identitu, se kterou se mohou ztotožňovat nebo ji jako takovou vyjadřovat obyvatelé již neexistující země - Jugoslávie. Klíčovouotázkou je,zda vůbec existuje něco takového jako společná identita bývalého společného státu, která by byla odlišná od etnických a jiných post-jugoslávských identit. A dále pak, jak vlastně tento proces identifikace funguje a jaké jsou jeho základní element. Práce zkoumá možnost existence takové společné identity nebo jejích prvků, které by se projevovaly pouze (a specifickým způsobem), když jsou tito jedinci spolu, obvykle v kontextu společenských aktivit nebo sdílené emigrační zkušenosti. Hledání identity založené na etnických principech, jako je jazyk či území, identity odlišné od ostatních identit, a to i v rámci jednotlivců různých etnik, je v jistém smyslu provokativní...
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Pandemic: about war, oppression and other metaphors
Tikal, Matěj ; Dvořák, Tomáš (advisor) ; Hájek, Martin (referee)
This thesis is based on analysis of metaphors, that were used by Czech political elite to construct meaning of Covid-19 pandemic and its implications for Czech society. Pandemic is firstly described as political problem and selected literature is used to describe pandemic discourse. Next, notion of social constructivism and conceptual theory of metaphors are introduced. Political rhetoric is conceived as conflictual and in common relation with public debate. Based on critical metaphorical analysis, this thesis revealed conflict between value of safety and freedom that was reflected in metaphors of war and oppression. This contest of metaphors can be used to interpret and explain some of the phenomena Czech society witnessed during Covid- 19 pandemic. This thesis shows that metaphors are valuable instrument for analysis of problems, that defy the possibility of being observed by instruments of everyday knowledge. This is why metaphor analysis can be deemed as useful tool for research of upcoming crises, which might emit similar level of abstraction, as Covid-19 pandemic.
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The phenomenon of single motherhood in the online space and public opinion
Němcová, Barbora ; Hájek, Martin (advisor) ; Vocásek, Tibor (referee)
The topic of this thesis is analysing the differences in attitudes towards single mothers in public opinion and media representation. The theoretical part draws on the concepts of feminization of poverty, stigmatization, and agenda-setting theory. The thesis utilizes quantitative methods - factor analysis and contingency table analysis of public opinion (with data from VÚPSV 2019) and content analysis of online articles (326). The analysis of public opinion revealed a diversity of attitudes towards single mothers, with women, single and divorced individuals exhibiting greater support for single-parent parenting and state financial assistance, while men, married individuals, and older respondents tended to disagree. A general tendency to support financial assistance for single mothers was observed. Quantitative content analysis of online articles indicated that the media representation of single mothers is predominantly non- stigmatizing or positive (56%). Despite the prevalence of a non-stigmatizing image in the media, there remains a tendency towards homogenization and stereotyping of single mothers as victims of gender and structural inequalities. The media image reproduces the notion of single mothers as victims dependent on financial assistance, which aligns with the concept of the feminization...
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The Study of Serviceability of Highway network with Using of Telematics
Bruna, Jiří ; Hájek, Martin (referee) ; Jurová, Marie (advisor)
In the mean time there are only a few objective information available in a road accident . A electronically motor vehicle operational data recorder, that is main topic of my graduate work could record maximum of vehicle operational data (time, velocity, activity of brakes, activity of ABS, lights, blinkers, operational engine measures). This information could contribute to faster car crash investigation.
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Assessing Selected Indicators Using Statistical Methods
Lovas, Jakub ; Hájek, Michal (referee) ; Doubravský, Karel (advisor)
The bachelor thesis deals with the assessment of selected indicators of SAKO Brno a.s. using statistical methods. Theoretical starting points describing selected indicators and statistical methods are presented in the first part of thesis. The practical part contains the calculations of the individual indicators for the period from 2009 to 2015, which are necessary for the development of own solutions proposals. The bachelor thesis also includes a simple application created in Microsoft Office Excel 2016.
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Antenna for smart watch
Hájek, Miroslav ; Láčík, Jaroslav (referee) ; Cupal, Miroslav (advisor)
The objective of this work is a create a smart watch antenna, that will operate in two frequency bands. These are GSM (1.8 GHz) and ISM (2.4 GHz) bands. This antenna must be able to work when be placed on an elastic material that is used as a smart watch belt. Antennas options are analyzed and their suitability for given use. There is also an antenna model in CST microwave studio, where all the simulations were made. The antenna is also simulated on human hand models that have different dimensions and tissue ratios.
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