National Repository of Grey Literature 458 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Wireless Telemetric Datalogger
Halgoš, Matúš
This paper describes how to effectively use telemetry commonly used in motorsport, butis rarely seen used by ordinary drivers. The purpose of the telemetry datalogger is to provide thedriver with as much information about his vehicle as he wants, while leaving the vehicle withoutmechanical intervention. The datalogger consists of sensors that send values and a datalogger thatprocesses the data and plots it into graphs.
Study Of Life Cycle Of The Accumulators
Babieska, Lukáš
This article presents the issue of changing the parameters of a Li-Ion accumulator during its life cycle. The introduction briefly describes the theory of accumulator charging and discharging and the effect of temperature on these processes. The next part introduces practical measurements and changes of parameters of two different accumulators.
Forecasting Electricity Pricing in Central and Eastern Europe
Křížová, Kristýna ; Krištoufek, Ladislav (advisor) ; Baruník, Jozef (referee)
Within forecasting electricity pricing, we analyse whether adding various vari- ables improves the predictions, and if shorter time intervals between observa- tions enhance accuracy of the forecasting. Next, we focus on proper selection of lagged observations, which has not been thoroughly covered in the past litera- ture. In addition, many papers studied electricity prices in larger markets (e.g. United States, Australia, Nord Pool, etc.) on datasets limited in scope, with 2-3 years timespan. To address these gaps in literature, we obtain one daily and one hourly dataset, both spanning 6 years (January 1, 2015 - December 31, 2020), from four Central and Eastern European countries - the Czech Repub- lic, the Slovak Republic, Hungary, and Romania. These contain information on the electricity prices, and information on our observed added variables - temperature and cross-border electricity flows. For the forecasting, we use two different methods - Autoregression (AR) and Seemingly Unrelated Regression (SUR). The thorough selection of lagged observations, which we accustom to the closing time of the auction-based electricity market system, serves further studies as a guidance on how to avoid possible errors and inconsistencies in their predictions. In our analyses, both AR and SUR models show that...
The Effect of Temperature on Suicide: A Meta-Analysis
Bartušek, Daniel ; Havránková, Zuzana (advisor) ; Bajzík, Josef (referee)
In this thesis I investigate the empirical evidence on the relationship between temperature and suicide rates. The previous survey on the relationship sug- gested that a 1řC increase in temperature is associated with a 1% increase in suicide risk. An estimate of this magnitude would play a significant role in the computation of the social cost of carbon, a concept used to set climate-related regulations by policymakers around the world. I challenge this conclusion using novel, state-of-the-art meta-analysis methods. By expanding the dataset and correcting for publication bias I show that the effect of temperature on suicide rates is three times less than previously suggested, deeming the relationship economically insignificant. Moreover, I did not find any robust evidence for a specific study design that would systematically influence the magnitude of the estimated effect quantifying this relationship. Keywords temperature, weather, climate, suicide, suicidality Title Effect of Temperature on Suicide - Meta Analysis 1
A climatological view of atmospheric fronts
Švábek, David ; Huth, Radan (advisor) ; Gvoždíková, Blanka (referee)
This bachelor thesis is focused on a climatological view of atmospheric fronts, which in middle latitudes greatly determine weather and its changes. Scientific literature is reviewed in the text, accompanied by manifestations of atmospheric fronts in a global and local scale for the areas of western and especially central Europe, whereas connection with temperatures, precipitation and other meteorological elements and it's long-term changes are emphasised. Further, the thesis is focused on problems connected with atmospheric fronts detection which is directly related to the most common places of occurence. The objective of the practical part is an analysis of the atmospheric fronts passages over the Praha-Ruzyně meteorological station during twenty year period from 1. 12. 2000 to 30. 11. 2020 with emphasis on winter and summer months. Key words: atmospheric fronts, climatology, temperature, precipitation, climate variability
Ecological Effects of Climate Change on Snakes
Veverková, Barbora ; Sedláček, Ondřej (advisor) ; Frýdlová, Petra (referee)
Climate change is currently one of the biggest threats that animal species must face. Increasing temperatures cause declines in wildlife populations all around the world. Ectothermic animals might be amongst the most threatened organisms by climate change due to their ecology that makes them dependent on ambient temperature. As ectotherms, snakes will most likely need to adapt to new climatic conditions, or they become extinct. To escape raising temperatures and decreasing precipitation, snakes might shift their ranges and move into more suitable areas. However, snakes have a low dispersal ability, which might lead to range reduction and in some populations even extinction. Climatic changes might affect health and behaviour of snake species as well. Increased temperatures can alter incubation period and embryonic development. Alterations in embryonic development and reduction of incubation period can cause different kinds of malformations, especially in oviparous snakes. These malformations can negatively impact fitness, depending on their severity. Some snake species might also benefit from climate change. Elevated temperatures allow snakes to be more active and, in some cases, even shorten hibernation duration. Snakes are also able to better escape predators in high temperatures than in low...
Ecological trends in xylem production of woody plants
Tichý, Jan ; Treml, Václav (advisor) ; Schnablová, Renata (referee)
Xylogenesis (wood formation) is one of the most important biological processes on Earth. Woody plants store atmospheric carbon during this process and are thus an essential player in the carbon cycle, and therefore in the interactions of the biosphere and the Earth's climate system. The course of xylogenesis is affected by many factors, the main factors include photoperiod, temperature and water availability. The significance and impact of individual factors on xylogenesis changes with time and place on Earth. The cambium, which by its division forms wood, enters the dormant and active phase during the year. As part of the changes in the activity of the cambium, rings are formed from which it is possible to read the conditions in which the tree was located during the formation of the given tree ring. This characteristic feature of wood is the subject of many studies and can be used to investigate the effects of climate change on xylogenesis.
The study of bryophyte species richness and community composition on a very fine spatial scale connected to in situ measured microclimate
Růžičková, Anna ; Man, Matěj (advisor) ; Marková, Ivana (referee)
The life of bryophytes is closely connected with their surrounding environment. Changes in atmospheric conditions on the microscale directly affect the physiological functions of bryophytes, which in turn determine their distribution. The current development of technologies allows us to measure the microclimate affecting bryophytes directly in the field. Nevertheless, there have not been many studies published examining the response of bryophytes to in situ measured microclimate. This diploma thesis is one of the first in Europe to provide data from continuous field microclimatic measurement performed on a scale relevant to bryophytes. It deals with the influence of the microclimate on the bryophyte species richness and community composition within a single gorge in the Bohemian Switzerland National Park. For 17 months, 38 HOBO Pro v2 Onset dataloggers were recording air temperature and air humidity 10 cm above the ground. I performed detailed bryological survey on two differently sized plots (circle with a radius of 1 or 2 m) around each of the dataloggers. The microclimate is influenced by the topography and character of the vegetation, therefore I derived topographical data from a digital terrain model (resolution of 1 m), calculated the canopy openness using hemispherical photographs and...
Molecular mechanisms of polymodal regulation of TRPA1 receptor
Sinica, Viktor ; Vlachová, Viktorie (advisor) ; Vondrášek, Jiří (referee) ; Holendová, Blanka (referee)
The TRPA1 channel is a universal, nociception-mediating cellular sensor activated by various environmental irritants, potentially harmful physical modalities and endogenous mediators of pathophysiological processes. The polymodality of TRPA1 channel allows the activation stimuli to further enhance or suppress each other's effect. While this modulation effect has its physiological importance in promoting the protective cellular and behavioral mechanisms, it may result into the unpleasant pain-related effects accompanying the chronical pain caused by aberrant TRPA1 channel activity. In order to effectively and selectively target the synergic properties of TRPA1 modulators, while preserving the sensitivity to the environmental threads, the knowledge of the mechanisms of polymodal regulation at the molecular level are required. This doctoral thesis aims at the elucidation of three main mechanisms of TRPA1 regulation: 1) the regulation via intracellular signaling cascades and phosphorylation, 2) the interaction with membrane phospholipids and 3) the temperature-driven gating. The results presented in the thesis show that the effects of the inflammatory mediator bradykinin are decreased by the low-frequency high-induction electromagnetic field used in magnetotherapy. We have identified a residue S602...
Platform for Measurement of Atmospheric Quantities
Hanák, Jiří ; Vlk, Jan (referee) ; Chudý, Peter (advisor)
This work is dealing with the design and implementation of an embedded system for aerology measuring. The aim of the system is to monitor atmospheric states during an ascent in the suspension under an meteorological balloon.   First of all, attention is given to the Earth's atmosphere and its quantities, then an overview of existing systems for performing aerological measurements. The core of the work is focused on the choice of measurement techniques and the selection of suitable measuring elements for a given scenario. The aerological probe is using atmospheric sensors HIH-8131-021-001, MS5611-01BA03 and PT1000-550 for temperature sensing, while GNSS data is received using the MAX-M8Q-0 module and the measured data is stored on a microSD card and transmitted in parallel using the MTX2-434.650-10 radio module. The system is controlled by STM32L1 from STMicroelectronics programmed in C using  HAL abstraction layer.

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