Tomas Bata University in Zlín
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Assessment of the readiness of the selected object of transport infrastructure for violent attacks
No full textThe article is focused on the assessment of the readiness of a selected transport infrastructure object for a violent attack. The protection of soft targets is an area that has been addressed as a priority in security for several years. Transport infrastructure is one of the most endangered destinations due to its attractiveness, a large number of passengers, openness and often also due to its international character. The article aims to show the assessment of the readiness of the security system, both from a technical and human point of view, on one selected object. Based on the risk analysis, the threat of the given object, vulnerabilities and weak points will be evaluated. Subsequently, we will focus on improving the system with an emphasis on the human factor, which is often neglected. © 2022 Kaunas University of Technology. All rights reserved.Technology Agency of the Czech Republic, TAC
Simple software simulator for teaching embedded programming
Get PDFThis article presents simple software simulator of a microcontroller evaluation board FRDM-KL25Z. The simulator was developed to make it possible to teach our embedded systems course online during the COVID-19 pandemic. It is in principle a software library that handles function calls and register access from student's program and displays the outputs in a console window of a stan-dard desktop application. It does not require any special hardware or software tools except an IDE capable of building C++ applications for the desktop com-puter. It can be easily modified for different microcontrollers and thus can be useful if existing lessons need to be switched from in-person to distance learning at a short notice
Propose-specific information related to prediction level at x and mean magnitude of relative error: A case study of software effort estimation
Get PDFThe prediction level at x (PRED(x)) and mean magnitude of relative error (MMRE) are measured based on the magnitude of relative error between real and predicted values. They are the standard metrics that evaluate accurate effort estimates. However, these values might not reveal the magnitude of over-/under-estimation. This study aims to define additional information associated with the PRED(x) and MMRE to help practitioners better interpret those values. We propose the formulas associated with the PRED(x) and MMRE to express the level of scatters of predictive values versus actual values on the left (sig(Left)), on the right (sig(Right)), and on the mean of the scatters (sig). We depict the benefit of the formulas with three use case points datasets. The proposed formulas might contribute to enriching the value of the PRED(x) and MMRE in validating the effort estimation.RVO/FAI/2021/002Faculty of Applied Informatics, Tomas Bata University in Zlin; [RVO/FAI/2021/002
Solving power outages in healthcare facilities: Algorithmisation and assessment of preparedness
Get PDFPower outages present a significant threat to all of humanity. However, elements of critical infrastructure are most affected by this event. Among other things, healthcare facilities can be considered critical infrastructure. They are the backbone for saving lives. However, even these medical facilities can be endangered. The primary aim of this paper is to design an algorithm to assess healthcare facilities to solve power outages. Several inputs are considered for the evaluation of healthcare facilities. Based on these inputs, we could gain several outputs, such as object priority, preparedness of the healthcare facility, missing aggregate capacity and fuel stocks. Calculations to obtain this information are available in this article. This algorithm follows up the methodology for the categorisation and prioritisation of objects necessary for the resumption of electricity supply after a blackout. We conclude that only 15% of the surveyed healthcare facilities are prepared for a power outage.Univerzita Tomáše Bati ve Zlíněproject Tomas Bata University in Zlin, DKRVO/FLK
Export and exports risks of small and medium enterprises during the COVID-19 pandemic
Get PDFCOVID-19 has created an entirely new unknown environment with new risks. Various restrictive national measures seeking to protect health took precedence over economic measures. Moreover, a large number of businesses are entirely dependent on international trade and exports. The aim of this paper is to map and analyze the development of small and medium enterprises’ exports during the COVID-19 pandemic in the Czech Republic. Moreover, it identifies the most significant export risks and their perception by small and medium enterprises. The chi-square test, Cramer’s coefficient, and exact binomial test were used to verify the statistical dependencies of research questions and hypotheses. Empirically, the statistically significant impact of the COVID-19 pandemic on the decline in small and medium enterprises’ exports was confirmed. In connection with the effectiveness of risk management, it was found that less than 50% of enterprises in the research sample are not ISO 31000-certified. The study concluded that the most significant export risks confirmed by statistical testing were COVID-19 risks and payment morale of foreign trading partners. © Romana Heinzova, Eva Hoke, Tomas Urbanek, Pavel Taraba, 2023
Polymer/layered clay/polyurethane nanocomposites: P3HB hybrid nanobiocomposites - Preparation and properties evaluation
Get PDFThis paper presents an attempt to improve the properties of poly(3-hydroxybutyrate) (P3HB) using linear aliphatic polyurethane (PU400) and organomodified montmorillonite (MMT)-(Cloisite((R))30B). The nanostructure of hybrid nanobiocomposites produced by extrusion was analyzed by X-ray diffraction and transmission electron microscopy, and the morphology was analyzed by scanning electron microscopy. In addition, selected mechanical properties and thermal properties were studied by thermogravimetric analysis, TGA, and differential scanning calorimetry, DSC. The interactions of the composite ingredients were indicated by FT IR spectroscopy. The effect of the amount of nanofiller on the properties of prepared hybrid nanobiocomposites was noted. Moreover, the non-equilibrium and equilibrium thermal parameters of nanobiocomposites were established based on their thermal history. Based on equilibrium parameters (i.e., the heat of fusion for the fully crystalline materials and the change in the heat capacity at the glass transition temperature for the fully amorphous nanobiocomposites), the degree of crystallinity and the mobile and rigid amorphous fractions were estimated. The addition of Cloisite((R))30B and aliphatic polyurethane to the P3HB matrix caused a decrease in the degree of crystallinity in reference to the unfilled P3HB. Simultaneously, an increase in the amorphous phase contents was noted. A rigid amorphous fraction was also denoted. Thermogravimetric analysis of the nanocomposites was also carried out and showed that the thermal stability of all nanocomposites was higher than that of the unfilled P3HB. An additional 1% mass of nanofiller increased the degradation temperature of the nanocomposites by about 30 degrees C in reference to the unfilled P3HB. Moreover, it was found that obtained hybrid nanobiocomposites containing 10 wt.% of aliphatic polyurethane (PU400) and the smallest amount of nanofiller (1 wt.% of Cloisite((R))30B) showed the best mechanical properties. We observed a desirable decrease in hardness of 15%, an increase in the relative strain at break of 60% and in the impact strength of 15% of the newly prepared nanobiocomposites with respect to the unfiled P3HB. The produced hybrid nanobiocomposites combined the best features induced by the plasticizing effect of polyurethane and the formation of P3HB-montmorillonite-polyurethane (P3HB-PU-MMT) adducts, which resulted in the improvement of the thermal and mechanical properties.Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT: 8J20PL026, RP/CPS/2022/002Ministry of Education, Youth and Sports of the Czech Republic [8J20PL026, RP/CPS/2022/002
Crime scene testimony in virtual reality applicability assessment
No full text3D reconstruction represents sophisticated approach to crime scene documentation and farther forensic analysis; however, quality of results is strictly depended on source data. This article identifies feasibility limits and defines critical requirements for crime scene 3D reconstruction. An evaluation triangle is proposed to realize method applicability assessment. Moreover, individual factors influencing the feasibility were described in detail and their mutual relationship has been formulated. A crime scene testimony in virtual reality workflow was provided to visualize individual process relation. © 2022 IEEE.MV-73045-3/OBVV-2021; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT: LO1303, MSMT-7778/2014; European Regional Development Fund, ERDF: CEBIA-Tech ED2.1.00/03.008
Diagnostic management, operating state configuration
No full textThis article introduces the research and design of a suitable diagnostic equipment design that will be regularly monitored and recorded selected quantity in the device. The diagnostic equipment must be as flexible as possible, the design will apply to the project's electronic output equipment. This means that the diagnostic design can be applied to all control units, add-on modules, or turnstile controllers. Each inspected element contains different quantities that are valid for correct diagnostics. The data itself will contain the exact time and date of the measurement. This information will be kept for several years for a back diagnosis. The data will be primarily stored on the device with the possibility of transferring it to a PC via the interface. Basic states will be available directly on the device. This information will be displayed via a small integrated display directly on the PCB. The data itself should be stored on a medium that retains the information even when the power supply is interrupted. The diagnostic part itself should be equipped with a backup battery, which will be functional even after the failure of the primary power supply for possible failure diagnosis. The design should consist of a microcomputer that will record events that can be updated with firmware to accommodate the board's needs. A simple program that visualizes the data for easier diagnostics will be needed to view the recorded data more easily. © 2022 IEEE
Research on biometrical systems: An overview
No full textThe most commonly used biometrical systems nowadays are fingerprint and face recognition systems. As the technics develops, so do tresspassers. In our research, we test the endurance, reliability, credibility and integrity of those systems by the use of modern utilities and materials for defeating satefy devices. This paper mainly deals with the contemporary results of research currently progressing in the world as our own research is still in progress
Batch reactor control problems caused by the reaction speed
No full textThe chemical batch reactor control is usually difficult by common methods. This is caused by the system nonlinearity and complexity. One of important factors in the control field is the varying in-reactor reaction speed. In this paper, the influence of the reaction speed on the process control and its safety is discussed. A first order exothermic chemical reaction is considered to be running in the reactor. A process model accounting this type of reaction was set up and used to trace the in-reactor temperature development. Obtained results are discussed