Tomas Bata University in Zlín
Institutional repository of Tomas Bata University LibraryNot a member yet
10673 research outputs found
Sort by
Proposal for technology of improvised shelters design in conditions of the Czech Republic
No full textThis paper deals with the possibilities of effective development of sphere ofpopulation's concealment against the influence of mass destruction weapons and other extraordinary events in the Czech Republic. In relation to legislative changes (The concept of population protection by the year 2013 until the year 2020) the paper analyses bases for building improvised shelters processing and creation of a standard for their designing. Created standard presents a model for other self- governing units utilisable in terms of crisis management
Modelling of modified micro-flow sensor
No full textIn the presented investigation, the problem of accurate determination of micro mass flow was studied. The measurement of mentioned flow range is becoming more and more important for a lot of applications in the life science, analysis, biotechnologies, synthesis (of e.g. pharmaceuticals) and nanotechnology markets. In this paper a flowmeter design applicable for measurement of low gas flow amounts is presented. To this end, the numeric model of designed flowmeter was made and the flowmeter was numerically simulated using compressible Navier - Stokes equations in two dimensions. The computations were carried out for several types of agitated gases. The results were compared with experimental data
The impact of business owners' individual characteristics on patenting in the context of digital innovation
No full textAs digital transformation accelerates, generating demand for new digital products, processes, and technologies, it is necessary to create consensus among all the actors involved on the company's digital innovation strategies. Owners greatly influence a company's objectives and design: they represent a group to which the top management must pay particular attention. Understanding which individual aspects of the owners influence digital innovation processes becomes very important. However, studies on the impact of owners' characteristics on digital innovation are rare. This article analyzes over 550 patent-holder firms engaged in digital innovation to fill this gap. The study evaluates the relationship between owners' characteristics and patenting activity. The results show a significant impact of gender diversity, education, and minority status of the owners on digital innovation. By favoring a deeper understanding of the profile of owners concerning digital innovation, the findings of this study help top management identify more effective engagement strategies for a better performance of the digital transformation process.Italian National Operational Programme on Research and Innovation Attraction and International Mobility [AIM1805501-1
Modeling of creep behavior of particulate composites with focus on interfacial adhesion effect
Get PDFEvaluation of creep compliance of particulate composites using empirical models always provides parameters depending on initial stress and material composition. The effort spent to connect model parameters with physical properties has not resulted in success yet. Further, during the creep, delamination between matrix and filler may occur depending on time and initial stress, reducing an interface adhesion and load transfer to filler particles. In this paper, the creep compliance curves of glass beads reinforced poly(butylene terephthalate) composites were fitted with Burgers and Findley models providing different sets of time-dependent model parameters for each initial stress. Despite the finding that the Findley model performs well in a primary creep, the Burgers model is more suitable if secondary creep comes into play; they allow only for a qualitative prediction of creep behavior because the interface adhesion and its time dependency is an implicit, hidden parameter. As Young's modulus is a parameter of these models (and the majority of other creep models), it was selected to be introduced as a filler content-dependent parameter with the help of the cube in cube elementary volume approach of Paul. The analysis led to the time-dependent creep compliance that depends only on the time-dependent creep of the matrix and the normalized particle distance (or the filler volume content), and it allowed accounting for the adhesion effect. Comparison with the experimental data confirmed that the elementary volume-based creep compliance function can be used to predict the realistic creep behavior of particulate composites.Ministry of Education, Youth and Sports of the Czech Republic-DKRVO [RP/CPS/2022/003
ARIMA for short-term and LSTM for long-term in daily Bitcoin price prediction
No full textThe goal of this paper is the insight into the forecasting of Bitcoin price using machine learning models like AutoRegressive Integrated Moving Average (ARIMA), Support vector machines (SVM), hybrid ARIMA-SVM, and Long short-term memory (LSTM). Depending on the different types of data and the period, various models are used for prediction. A single model may be the best fit in the short term but may not be the best in long-term series data. Thus, using only a single model may not be suitable for forecasting time series data that depends on data sampling length and prediction time, and the type of specific applications. As a result, the ARIMA model produces better error results with a short prediction period or a small data set. In contrast, the Hybrid ARIMA-SVM model will help improve the performance of the ARIMA model when predicting over a long period, specifically 7 and 30 days for Bitcoin price prediction used in this research paper. The paper aims to compare traditional models such as the ARIMA, the Hybrid ARIMA-SVM, and deep learning models such as LSTM on a specific cryptocurrency prediction task using different scenarios.IGA/CebiaTech/2022/001; Vysoká Škola Bánská - Technická Univerzita OstravaVSB-Technical University of Ostrava, Czech Republic [SP2022/22]; Internal Grant Agency of Tomas Bata University [IGA/CebiaTech/2022/001
Comparison of web pagebuilders and their use in teaching web development
No full textWeb development and web design are one of the main aims of informatics. The technology age allows the creation of websites with many frameworks, languages, and utilities. One helpful utility is Pagebuilders. These editors or applications are useful for designing prototyping, building landing pages, learning how web design UI/UX works, or creating webs and e-shops for customers in record time. The article describes block programming and comparison with Pagebuilders. The following pages compare five popular Pagebuilders and their usage with their pros and cons, style of their main aim, and functions mainly aimed at teaching web development. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG
Values definition of the leading threshold of the primary process colors by the method of color separation and image segmentation by thresholding
No full textImage analysis and image segmentation methods are a current field of computer vision and are applied in many fields. This text deals with image segmentation and defining the leading edge of a color sample. For the experiment, a sample of material printed with process inks and their overprint was used. The printed material is a glossy white paper with primary print process colors Magenta and Yellow. The paper presents the methodology and procedure of image segmentation using the separation of colors into halftone values. From that values, this basic threshold is created and defined. A convulsion mask was used, the maximum target threshold of the given color was obtained from this basic halftone threshold, and its values were defined. Methods of image analysis of color originals offer the potential for use in the field of protection against forgery of works of art, especially in the area of graphic art techniques and their specific areas.IGA/CebiaTech/2022/004European Structural and Investment Funds, Operational Programme Research, Development and Education under the project Development of Research-Oriented Study Programs at FAI [CZ.02.2.69/0.0/0.0/16_018/0002381]; InternationalGrand Agency of ThomasBataUniversity in Zlin [IGA/CebiaTech/2022/004]; Department of Security Engineering, Faculty of Applied Informatic
Polyethylene glycol and sorbitol-mediated in vitro screening for drought stress as an efficient and rapid tool to reach the tolerant cucumis melo l. genotypes
Get PDFAn efficient method to instantly assess drought-tolerant plants after germination is using osmoregulation in tissue culture media. In this study, the responses of three Iranian melon genotypes to sorbitol (0.1, 0.2, and 0.4 M) or polyethylene glycol (PEG) (0.009, 0.012, and 0.015 M) were evaluated as drought stress simulators in MS medium. 'Girke' (GIR), 'Ghobadloo' (GHO), and 'Toghermezi' (TOG) were the genotypes. GIR is reputed as a drought-tolerant genotype in Iran. The PEG or sorbitol decreased the coleoptile length, fresh weight, and photosynthetic pigments content while enhancing proline and malondialdehyde (MDA) contents. Protein content and antioxidant enzyme activity were utterly dependent on genotype, osmotic regulators, and their concentration. Coleoptile length, root and shoot fresh weight, root dry weight, proline and MDA content, and guaiacol peroxidase (GPX) activity can be used as indicators for in vitro screening of Cucumis melo L. genotypes. The results showed that sorbitol mimics drought stress better than PEG. Overall, our findings suggest that in vitro screening could be an accurate, rapid, and reliable methodology for evaluating and identifying drought-tolerant genotypes.IGA/FT/2023/003; University of MaraghehUniversity of Maragheh, Iran; TBU in Zlin [IGA/FT/2023/003
Risk management level determinants in Visegrad countries - Sectoral analysis
Get PDFIncreasing competition has emphasized the need for creating and using more effective strategies at the level of SMEs to achieve competitive advantage. SMEs face higher risks in terms of the globalization due to the limited resources as well as size. The objective of the study was to examine the determinants of risk management with an emphasis on the sector specifics of SMEs in the V4 countries. This enables the quantification of sectoral differences in relation to the socio-economic determinants. The research sample included 1585 SMEs from the V4 countries. The data obtained from SME managers and owners were processed using the descriptive statistics and logistic regression. The results of the analyses confirm the existence of differences across SMEs concerning the risk management, which are determined by the country in which a given com-pany operates, industry, gender and age of its manager or the owner of the company. The results of the study provide a valuable platform for the development of systems to measure and assess business risks in companies and to set up training systems. It will also enhance the development of international and national benchmarking indicators and the creation of international databases for comparative analyses
How does green HRM influence environmental and social sustainability in hotels?
No full textGreen human resource management (GHRM) is bringing positive transformations in business and society, as well as challenges for hotels. Drawing from social cognitive theory (SCT), this study examined green HRM with environmental and social performance. Significantly, this paper also used organizational green culture as a mediation variable. This empirical study employed a quantitative research method. Data were collected from 155 employees working in Pakistan’s hotels. The results demonstrate that green HRM (t-statistic value = 9.676, p-value = 0.000) is positively related to organizational green culture. In addition, organizational green culture (t-statistic value = 11.254, p-value = 0.000, t-statistic value = 16.882, p-value = 0.000) has a significant effect on environmental and social performance. Moreover, organizational green culture fully mediated the relationship between green HRM and environmental performance (t-statistic value = 5.444, p-value = 0.000). Finally, organizational green culture fully mediated the relationship between green HRM and social performance (t-statistic value = 7.218, p-value = 0.000).5-6/2022-23/FaME/006, IGA/FaME/2023/01