Publikační činnost Fakulty bezpečnostního inženýrství / Publications of Faculty of Safety Engineering (FBI)

Permanent URI for this collectionhttp://hdl.handle.net/10084/116563

Browse

Recent Submissions

Now showing 1 - 3 out of 3 results
  • Thumbnail Image
    Item type: Item ,
    Monte Carlo analysis for evacuation in multipurpose event spaces
    (MDPI, 2024) Snohová, Adéla; Kučera, Petr; Pokorný, Jiří; Bernatík, Aleš
    This paper addresses the evacuation of people from multipurpose halls and introduces an innovative approach that uses a probabilistic model, specifically the Monte Carlo method, to analyse iterative evacuation processes. The aim is to explore how this modern technology can contribute to the development of effective and safe evacuation plans for mass events. The Monte Carlo method was applied to a specific example of a multipurpose hall that offers different configurations for events such as sports matches, concerts, or performances. The evacuation of people was analysed for two configurations: a hockey match with a capacity of 9500 people and a concert with a capacity of 11,000 people. In both cases, the total evacuation of people from the hall was analysed, and the evacuation time was evaluated when two parameters were changed: speed of movement and preference for door selection. The results of the simulations can provide valuable information for the design of effective safety measures in multipurpose halls and other similar multipurpose venues. This innovative approach to evacuation analysis allows for a comprehensive assessment of the evacuation process, identification of critical areas, and verification of the layout of the space.
  • Thumbnail Image
    Item type: Item ,
    Verification of a novel method of detecting faults in medium-voltage systems with covered conductors
    (Polska Akademia Nauk, 2017) Mišák, Stanislav; Hamacek, Štefan; Bartłomiejczyk, Mikołaj
    This paper describes the use of new methods of detecting faults in medium-voltage overhead lines built of covered conductors. The methods mainly address such faults as falling of a conductor, contacting a conductor with a tree branch, or falling a tree branch across three phases of a medium-voltage conductor. These faults cannot be detected by current digital relay protection systems. Therefore, a new system that can detect the above mentioned faults was developed. After having tested its operation, the system has already been implemented to protect medium-voltage overhead lines built of covered conductors.
  • Thumbnail Image
    Item type: Item ,
    Comparative analysis of toxic responses of organic extracts from diesel and selected alternative fuels engine emissions in human lung BEAS-2B cells
    (MDPI, 2016) Líbalová, Helena; Rossner, Pavel; Vrbová, Kristýna; Brzicová, Táňa; Sikorová, Jitka; Vojtíšek-Lom, Michal; Beranek, Vít; Kléma, Jiří; Ciganek, Miroslav; Neča, Jiří; Pěnčíková, Kateřina; Machala, Miroslav; Topinka, Jan
    This study used toxicogenomics to identify the complex biological response of human lung BEAS-2B cells treated with organic components of particulate matter in the exhaust of a diesel engine. First, we characterized particles from standard diesel (B0), biodiesel (methylesters of rapeseed oil) in its neat form (B100) and 30% by volume blend with diesel fuel (B30), and neat hydrotreated vegetable oil (NEXBTL100). The concentration of polycyclic aromatic hydrocarbons (PAHs) and their derivatives in organic extracts was the lowest for NEXBTL100 and higher for biodiesel. We further analyzed global gene expression changes in BEAS-2B cells following 4 h and 24 h treatment with extracts. The concentrations of 50 mu g extract/mL induced a similar molecular response. The common processes induced after 4 h treatment included antioxidant defense, metabolism of xenobiotics and lipids, suppression of pro-apoptotic stimuli, or induction of plasminogen activating cascade; 24 h treatment affected fewer processes, particularly those involved in detoxification of xenobiotics, including PAHs. The majority of distinctively deregulated genes detected after both 4 h and 24 h treatment were induced by NEXBTL100; the deregulated genes included, e.g., those involved in antioxidant defense and cell cycle regulation and proliferation. B100 extract, with the highest PAH concentrations, additionally affected several cell cycle regulatory genes and p38 signaling.