Tomas Bata University in Zlín
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Influence of composite lay-up and cyclic load parameters on the fatigue behaviour of flexible composite elements
Get PDFThis work is dedicated to the design of flexible composite elements, specifically leaf springs. The design of these flexible composite elements took in consideration the technologies, materials and intermediate goods that are available and useable in laboratory manufacturing and the possibility for the transfer of gained knowledge to industrial practice. This work deals with individual types of materials and their processability and usability for the manufacturing of composite products exposed to cyclic stress. The impact of the designed lay-up diagrams and cyclic load boundary on the fatigue behaviour of manufactured specimens was used to evaluate the effect of cyclic stressing. Based on this assessment, a conclusion and recommendation were formulated for the serial manufacturing of flexible composite elements.Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT; DKRVO, (RP/CPS/2022/003)Ministry of Education, Youth and Sports of the Czech Republic-DKRVO; [RP/CPS/2022/003
Sport in the context of sports betting and gambling from the perspective of university students: Case of the Czech Republic
No full textBACKGROUND: The sports sector with all its aspects has become an inseparable part of modern society and its influence is manifested in both, local and global, aspects of the life in every country. Not only does sport create and promote friendship, team play, regardless of gender, age, education, religion, ethnicity, social status, etc., but it is also associated with numerous undesirable consequences.
AIM: The primary objective of the research paper at hand was to examine the correlation between the amount invested in sports betting, as a form of gambling, and selected characteristics of university students in the Czech Republic.
METHODS: Various scientific methods, including analysis, synthesis, induction, and deduction, were employed in the preparation of the research article. Additionally, selected key databases such as the citation and reference database Scopus and the bibliographic and citation database WOS. The study comprised university students from the Czech Republic. The first group included 391 participants with prior experience in sports betting, while the second group comprised 679 respondents who had no previous exposure to sports betting.
RESULTS: The results confirm the dependence between the amount invested in sports betting, as a category of gambling, and one’s biological age, as well as gender or the type of faculty the respondent studies. Furthermore, the results in relation to sports betting confirm its dependence on the respondent’s relationship to sports.
CONCLUSIONS: The most common betting platform (bookmaker) preferred by university students in the Czech Republic for sports betting is an online or internet betting agency.FaME Tomas Bata University, (RVO/2022
Tech innovation! Industry 4.0 enablers and management initiative on innovation performance: a moderation model
No full textThis study examines the influence of Blockchain technology utilization (BTU), industrial internet-of-things (IoT), and resource-based management initiatives (RBMI) on innovation performance with the mediating role of organizational resilience in light of the resource-based view (RBV). Moreover, risk-taking tolerance is used as a moderator between organizational resilience and innovation performance. The Partial Least Square Structural Equation Modeling (PLS-SEM) technique was used to analyze the results. A simple random sampling technique was used to collect data from respondents. A total of 437 questionnaires were collected from the Pakistani automotive industry and used for final analysis. The finding reveals that industrial IoT and RBMI positively relate to organizational resilience and innovation performance. In contrast, BTU does not influence innovation performance but positively influences organizational resilience. Organizational resilience positively related to innovation performance. Organizational resilience significantly mediates between BTU, industrial IoT, RBMI, and innovation performance. Finally, risk-taking tolerance strengthens the relationship between organizational resilience and innovation performance. This research focuses on how management utilizes BTU, industrial IoT, RBMI, organizational resilience, and risk-taking tolerance in decision-making to examine innovation performance. This research initially develops a research model to incorporate BTU, industrial IoT, RBMI, organizational resilience, risk-taking tolerance, and innovation performance in RBV perspectives. Academicians, practitioners, and management can benefit from study results.National Office for Philosophy and Social Sciences, NPOPSS, (21AGL014); National Office for Philosophy and Social Sciences, NPOPSS; Science, Technology and Innovation Commission of Shenzhen Municipality, (JCYJ20210324093208022); Science, Technology and Innovation Commission of Shenzhen Municipality; Shenzhen University Humanitiesand Social Sciences High-level Innovation Team Project for Leading Scholars, (24LJXZ06
Evaluation of Ca(NO3)2 and various container cell size effects on some growth attributes and nutrient content of tomato transplants
Get PDFOptimizing container cell size and nutrition is crucial for enhancing the quality of vegetable transplants. The current study evaluated the effect of different cell sizes and Ca(NO3)2 on some properties of tomato (Solanum lycopersicum L.) transplants. Experimental treatment included four levels (0, 50, 100, and 150 mg L–1) of Ca(NO3)2 and 5 different cell sizes of containers (1, 2, 3, 4, and 5) in a factorial experiment based on a completely randomized design (CRD) with three replications under greenhouse conditions. Ca(NO3)2 and larger cell size, increased height, stem diameter, fresh and dry weights of roots and shoots, and concentration of chlorophyll, protein, SPAD, carbohydrates, and macro/micronutrients. The results revealed that maximum shoot and root fresh and dry weight, photosynthesis pigments, N, P, K, Ca, and Fe concentrations were recorded at 150 mg L–1 × cell size 5. In comparison, the highest Zn and Mn concentrations were recorded at 100 mg L–1 × cell size 4 and 5. Our results demonstrated that applying Ca(NO3)2 and increasing the cell size of the containers improved the traits evaluated, so Ca(NO3)2 at 10 and 15 mg L–1 with cell size 5 can be recommended to transplant producers.University of Maragheh; Internal Grant Agency of Tomas Bata University in Zlín, (IGA/FT/2024/006)University of Maragheh, Iran; Internal Grant Agency of Tomas Bata University in Zlin [IGA/FT/2024/006
Environmental and outdoor education in preschool through family camping: the example of Czech Woodcraft in parents' opinions
Get PDFThe present study focuses on the impact of woodcraft-style family camping on preschool children, using their parents' perspectives. Although the history and methodology of Woodcraft have been well documented, the theme of family camping has attracted very little research attention, and even fewer studies have targeted the impact of this leisure activity on preschool children. By inquiring about the parents' experience, the researchers adopted a qualitative approach backed by a phenomenology and hermeneutics-based philosophy for their empirical research. Data was collected through insightful interviews with seven respondents; parents experienced in Woodcraft camping with young children. Interpretative phenomenological analysis, which aims at understanding the uniqueness of one’s experience and the meaning attributed thereto, identified six phenomena describing the fundamental structure of this lifestyle: motivation for family camping; camp life and its principles; outdoor education; education through nature; community; and romanticised experiencing following the Native Americans. Since direct childhood experiences predominantly shape environmental attitudes, this topic should be addressed more in environmental education research
Safety breach analysis with subsequent proposal in the framework of fire protection
No full textCrisis management and population protection are among the primary activities of the state solutions. Therefore, it is essential to focus on these parts and address them preventively and repressively. This article describes (based on the actual event) the process of fire elimination and the solution of crisis management with activities related to population protection. This article deals with the analysis of safety breaches with a subsequent proposal in the context of fire protection. The result of this article is aimed at the proposal of preventive and repressive measures in the field of enterprise fire protection and population protection.Department of Security Engineering, Faculty of Applied Informatics; Univerzita Tomáše Bati ve Zlíně, (IGA/CebiaTech/2022/004
The implication of PMMA molecular weight on compatibility of SAN/PMMA blends containing GO-g-PMMA hybrid compatibilizers
No full textThe molecular weight of a polymer is one of the most important factors defining material properties and performance. Within the current study, poly(styrene-co-acrylonitrile)/poly(methyl methacrylate) (SAN/PMMA) blends containing hybrid particles of graphene oxide-g-poly(methyl methacrylate) (GO-g-PMMA) were designed so that the molecular weight of the PMMA chains tethered on the GO particles was correlated with the molecular weight of the PMMA matrix. Hybrid particles were prepared using surface-initiated atom transfer radical polymerization (ATRP). The number average molecular weight of the matrix PMMA was Mn = 20,100 or 130,900 g/mol, while in the case of hybrids it was Mn = 5600, 27,300 or 191,600 g/mol. Two blend compositions were investigated: SAN/PMMA= 70/30 and 90/10 wt/wt, and the content of GO-g-PMMA was 1 wt%. Based on rheological studies it was demonstrated that higher molecular weights of the matrix PMMA promoted the compatibility of SAN/PMMA due to the similar viscosity of both blend components. Furthermore, the length of the PMMA chains grafted to the GO influenced the viscoelastic response of the material, resulting in different relaxation behavior as confirmed by mean relaxation times calculated from Cole-Cole plots. In addition, the effect of neat GO and GO-g-PMMA particles on the blend morphology and size distribution of PMMA droplets was discussed based on rheology and TEM analyses.DKRVO, (RP/CPS/2022/003); Doctoral Candidate in the Interdisciplinary Doctoral School at the Lodz University of Technology; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠM
Biodegradable iron-based foams prepared by the space holder technique using urea
Get PDFIron-based degradable biomaterials have attracted much attention as next-generation bone implants due to their excellent mechanical properties and good biocompatibility. Many studies are now focusing on the preparation and detailed study of porous versus non-porous degradable materials. Porous degradable biomaterials have many advantages over the non-porous ones owing to their structure, which allows easier bone tissue ingrowth. The aim of this work was to prepare Fe-based biodegradable porous materials in a cost-effective way via powder metallurgy technique using urea space holders. Five different samples with increasing space holder weight ratio (up to 20 wt%) were prepared. Surface morphology and sample structure were studied using the optical microscopy, Raman spectroscopy, and scanning electron microscopy (SEM) with energy-dispersive X-ray analysis (EDX). Electrochemical corrosion rate analysis confirmed that the samples corroded faster with increasing number of pores. With an increasing amount of urea, the number of pores increased proportionally, which can potentially be used to tune the corrosion rate. However, mechanical integrity of the samples was not maintained when more than 10 wt% of space holder was used.Development Agency; Faculty of Science of P. J. Šafárik University, (VVGS-2023-2550); Ministry of Education, Science, Research and Sport; International Visegrad Fund, IVF, (22310096); European Commission, EC, (CZ.02.2.69/0.0/0.0/18_053/0017879); Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT, (RP/CPS/2022/005); Agentúra na Podporu Výskumu a Vývoja, APVV, (APVV-20-0278)Ministry of Education, Science, Research and Sport of the Slovak Republic in cooperation; Centre for Scientific and Technical Information of the Slovak Republic; Slovak Research and Development Agency [APVV-20-0278]; Operational Program for Research, Development and Education; European Union [CZ.02.2.69/0.0/0.0/18_053/0017879]; Development Agency; Ministry of Education, Youth and Sports of the Czech Republic [DKRVO RP/CPS/2022/005]; International Visegrad Fund [22310096]; Internal Research Grant of Faculty of Science of P. J. Safarik Universit
Discrimination of resected glioma tissues using surface enhanced Raman spectroscopy and Au@ZrO2 plasmonic nanosensor
Get PDFGliomas present one of the most prevalent malignant tumors related to the central nervous system. Surgical extraction is still a preferred route for glioma treatment. Nonetheless, neurosurgeons still have a considerable challenge to detect actual margins of the targeted glioma intraoperatively and correctly because of its great natural infiltration. Here we evaluated the possibility of using surface-enhanced Raman spectroscopy to analyze freshly resected brain tissues. The developed method is based on the application of Au@ZrO2 nanosensor. The plasmonic properties of the sensor were first tested on the analysis of Rhodamine 6G, where concentrations down to 10-7 mol/L can be successfully detected. We also compared the performance of the nanosensor with silver plasmonic nanoparticles, where similar results were obtained regarding the reduction of the fluorescence background and enhancement of the intensity of the measured analytical signal. However, application of silver nanospheres led to increased variations in spectral data due to its probable aggregation. Applied ZrO2@Au nanosensor thus dramatically lowers the fluorescence present in the Raman data, and considerably improves the quality of the measured signal. The developed method allows for rapid discrimination between the glioma's periphery and central parts, which could serve as a steppingstone toward highly precise neurosurgery.H2020 WIDESPREAD-2020-5, (952063); NANO4TARMED consortium; National Cancer Research Institute, NCRI, (LX22NPO5102); European Commission, EC; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT; Ministerstvo Zdravotnictví Ceské Republiky, MZCR, (NV19-04-00281)Ministry of Health of the Czech Republic [NV19-04-00281]; NANO4TARMED consortium (H2020 WIDESPREAD-2020-5) [952063]; MEYS CR [LM2018129]; National Institute for Cancer Research (Programme EXCELES) - European Union-Next Generation EU [LX22NPO5102
Individuálne reprezentácie lásky mladých ľudí na Slovensku a v Českej republike
Get PDFObjectives. The investigation of love has produced several psychological concepts and theories. In addition to general signs of love, several cross-cultural differences were also identified. The aim of the study was to verify the previously created 5-factor model of love, which was created on the basis of individual representations of love of young people in Slovakia, and to find out whether this model is also valid in a cross-cultural Czech-Slovak comparison. Sample and procedure. The research was conducted on a sample of 397 respondents from the Slovak Republic (M=23.1, SD=2.54, men=115; women=282) and 441 respondents from the Czech Republic (M=21, 5, SD=2.15; men=107; women=334) who were aged 18–29. The research was focused on this age cohort due to the fact that for this period of the so-called emerging adulthood is important to explore in the area of relationships and love.
Methods. Quantitative methodology was used in the research, the research was carried out with the help of an electronically administered ques-tionnaire. In the questionnaire, a previously ver-ified scale of Individual representations of love was used. In the questionnaire were included questions concerning selected characteristics of partner relationships and demographic data analyses. The data were processed by confirmatory factor analysis separately for the Czech and Slovak samples, further by correlation analyses and linear regression analysis, which showed relationships with other variables.
Results. The results showed in both countries 5 factors of individual representations of love: 1. physical love, commitment, building and searching, 2. spiritual love, 3. power and positive benefits of love, 4. the opposite side of love and 5. biological and self-centred love. Age and strength of religious faith shawed to be predic-tors of individual factors.
Limits. Since the research was not conducted on a representative sample and it mostly consisted of female university students, the possibilities of generalization are limited. This quantitative research also worked with a selected limited number of meanings of love.Vedecká Grantová Agentúra MŠVVaŠ SR a SAV, VEGA, (1/0426/18, APVV 18-0303