Tomas Bata University in Zlín
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Sveiko maisto restoranų pasirinkimo skatinimas internetinėje maisto pristatymo platformoje: Prieinamumo ir pirminio pasirinkimo poveikis
No full textThe nudge theory has gained much attention in academia; however, little is known about the effects of nudges on online food service environments. Hence, the study tests the effect of availability and priming nudges on consumers’ selection of healthy restaurants in a food delivery platform. A 2 x 2 between-subjects factorial design was utilized, with health prime (presence vs. absence) and restaurant availability (high vs. low) as factors. About 264 university undergraduate students participated study and were randomly allocated to the experimental conditions. Inferential statistics and binary logistic regression were used in data analysis. The results confirm the effect of restaurant availability and oppose health primes’ effect. A healthy restaurant is likely chosen when the choice environment has more healthy options to choose from. Health primes may spark health awareness among consumers; however, to cause a behavioral change, robust priming elements are required to cancel familiarity and self-licensing biases. A potential adaptation or modification of offline nudges is imperative to remain effectual. We offer practical implications for food delivery platform providers and policymakers in addressing health concerns around online food delivery services.Univerzita Tomáše Bati ve Zlíně: CZ.02.2.69/0.0/0.0/19_073/001694
Stabilization of second-order systems using a P/I-delayed controller
No full textThe present paper describes the stabilization and control of second-order systems using a proportional plus integral delayed controller (P/I-delayed controller). The stabilization of closed-loop control systems using a controller comprehends several techniques to increase the control circuit’s stability. Even in some simple second-order plants, the classical PI controller cannot be applied to pursue the closed-loop stability, although the design requisites, for example, constant reference tracking capability. In this paper, the control will be analyzed using a P/I-delayed controller. The main goal of this article is to obtain the global stability region (the region of global stability) in the two-dimensional plane for the delay-based P/I-delayed controller and to verify the control using the designed controller. The stabilization of linear-time invariant (LTI) systems with time delay in an integral part of the P/I-delayed controller will be studied in detail. Two typical examples, namely the control of an unstable plant and the control of a stable plant, are used as benchmarks to verify the proposal’s effectiveness. The simulation results show that the presented stabilization method is effective and practically applicable in both analysis and control. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.IGA/FAI/2022/00
A creating of processes and threads in MS Windows
No full textThis article discusses the differences between processes and threads in the MS Windows operating system. First, the mechanism of creating a new process and thread is explained, and then several measurements are performed under different conditions. It focuses on the time required to create a process or thread; several measurement methods are described. Finally, the advantages and disadvantages of processes and threads are summarized with recommendations. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG
Tuning the curing efficiency of conventional accelerated sulfur system for tailoring the properties of natural rubber/bromobutyl rubber blends
Get PDFThe state of cure and the vulcanizate properties of a conventional accelerated sulfur (CV) cured 50/50 blend of natural rubber (NR) and bromobutyl rubber (BIIR) were inferior. However, this blend exhibits a higher extent of cure with remarkable improvements in its mechanical properties, particularly the tensile strength, modulus and hardness after curing with a combination of accelerated sulfur and three parts per hundred rubber (phr) of a bismaleimide (MF3). Moreover, with the use of 0.25 phr of dicumyl peroxide (DCP) along with the CV/MF3 system, the compression set property of the CV-only cured blend could be reduced from 68% to 15%. The enhanced compatibility between NR and BIIR with the aid of bismaleimide via the Diels-Alder reaction was identified as the primary reason for the improved cure state and the mechanical properties. However, the incorporation of a certain amount of bismaleimide as a crosslink in the NR phase of the blend, via a radical initiated crosslinking process by the action of DCP, is responsible for the improved compression set properties.RP/CPS/2022/006; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠM
Research on using the Tecnomatix Plant Simulation for simulation and visualization of traffic processes at the traffic node
Get PDFSimulation software Tecnomatix Plant Simulation was originally created for a modelling and subsequent simulation of production and logistics processes. Its variability, however, opens its use also in other areas such as transport in urban agglomerations. Based on that, research was implemented to verify the program's application in urban transport, specifically to visualize and simulate traffic processes at the traffic node. The paper describes a methodology which made it possible to create a simulation program for traffic light intersections, and presents examples of the simulation model application. The proposed methodology will enable the application of Tecnomatix Plant Simulation to create a complex simulation model of the logistics process. It will mainly enable to simulate the field of production logistics and city logistics within one simulation model.Kultúrna a Edukacná Grantová Agentúra MŠVVaŠ SR, KEGA: 005TUKE-4/2022, 018TUKE-4/2022, 313011T567, APVV-21-0195, IGA/FLKŘ/2022/001, RVO/FLKŘ/2022/0
Degradation of tires during intended usage
No full textThere are several factors that influence the wear behaviour and service life of tires. Three of them are closely interrelated. They are the tire design, the operating conditions and the rubber material from which the tire is made. One of these factors is of utmost importance and less tangible. It is the choice of the appropriate elastomer, fillers, additives and also vulcanising agents to meet the specific requirements for a particular tire. There are expectations for noise, grip, rolling resistance and comfort, stability as well as safety at the limit (braking, cornering). Alongside this, the biggest challenge in tire development is to extend the lifetime of the tire by increasing resistance to tire degradation, which leads to cracking and wear, as much as possible to reduce overall costs and pollution and to increase sustainability to save resources. All these challenges are the focus of scientists and engineers as long as rubber is used for transport and locomotion of cars, trucks, etc. Moreover, it is difficult to establish correlations between available laboratory tests and real tire tests in the field. Therefore, this chapter gives a brief introduction to the theory of fracture mechanics of rubber leading to wear and shows why analyses with long known laboratory equipment predict a different wear behaviour of rubber than that of a tire in service. Finally, a broad overview is given of novel, high-performance technical measuring equipment with which very reliable experimental results could be obtained that correspond very well to the theory of fracture mechanics and much better to the real tire wear behaviour in service. The recent experimental research impressively demonstrates what a huge step has been taken in the meantime to improve the prediction of wear under specific operating conditions and the design and production for tailor-made tires.Ministry of Education, Youth and Sports of the Czech Republic - DKRVO [RP/CPS/2022/006, IGA/CPS/2021/006
Moisture as assessment criterion for coal rank and coal layers hazardous characteristics manifestation
Get PDFFor the time being, moisture effect to the useful quality of coals has been researched comprehensively in detail. Herewith, there are a lot of unsolved problems related to the safety working out of coal layers. Presence of different forms of moisture in fossil coals essentially influences the coal layers hazardous characteristics manifestation during the mining activities. The Article deals with the results of analyses of more than thousand samples of the Donets Basin coals from different deposits, to research the relationship of total moisture and organic matter components in the coal carbonizations during the metamorphic processes. The researches have allowed separation of 3 stages for the fossil coal conversions. It is noted that at the initial stage, the carbon content is about 80%, moisture proportion in carbonization is rather high 0.36; but it decreases abruptly down to 0.12, in case of the carbon content increasing up to 86.5%. And the proportion of components (hydrogen, oxygen, nitrogen, and sulphur) total increases essentially up to 0.88. At the next stage, at 86.5÷91.5%, the components proportion in carbonization changes insignificantly. At the final stage of coal metamorphic conversions, 4-time growth of moisture proportion takes place in carbonization. It is found that moisture proportion in any form to be found in the coals shall be considered as a rank index, which is necessary to determine the coal layers hazardous characteristics. © 2021 EDP Sciences. All rights reserved
Morphological and physiological responses of in vitro-grown cucurbita sp. landraces seedlings under osmotic stress by mannitol and PEG
Get PDFScreening and identification of tolerant genotypes using osmotic materials under in vitro culture could be rapid, easy, and even accurate. In this research, three Iranian landraces of Cucurbita sp. included Tanbal Ajili (Cucurbita maxima Duch.), Ajili Razan (Cucurbita pepo L.), and Balghabakhi (Cucurbita moschata Duch.) seeds were cultured in 1/4 MS medium. After germination, plantlets were transferred to MS media containing mannitol and PEG 6000. Mannitol and PEG at three concentrations of 0.1, 0.2, and 0.4 M and 0.009, 0.012, and 0.015 M, respectively, were added into the MS medium, while the MS medium without any adding was used as control. Our findings revealed that osmotic treatments significantly increased shoot and root dry weight (DW), malondialdehyde (MDA), and proline content, but significantly reduced coleoptile length, shoot and root fresh weight, and photosynthesis pigments content. Protein content, phenols, and flavonoids content, enzymatic and non-enzymatic antioxidant including ascorbate peroxidase (APX), guaiacol peroxidase (GPX), superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR) activity, reduced ascorbate (AsA), reduced ascorbate/dehydroascorbic acid (AsA/DHA), reduced glutathione (GSH), dehydroascorbic acid (DHA) and oxidized glutathione (GSSG), and reduced glutathione/oxidized glutathione (GSH/GSSG) were significantly increased at moderate osmotic stress induced by mannitol and PEG. In contrast, the previous physiological parameters were significantly reduced at higher water deficit conditions. With respect to most attributes and concentrations, mannitol simulated osmotic stress better than PEG. Our results revealed that applying PEG and mannitol under in vitro conditions could be an efficient way to evaluate and screen cucurbit genotypes for future breeding programs.IGA/FT/2022/004; University of MaraghehUniversity of Maragheh, Iran; [IGA/FT/2022/004
Dynamic assessment of cyber threats in the field of insurance
Get PDFThe area of digital technologies is currently the subject of many cyber threats, the frequency of which is increasing. One of the areas of cyber security is also the creation of models and estimates of the process of cyber threats and their possible financial impacts. However, some studies show that cyber-threat assessment to identify potential financial impacts for organizations is a very challenging process. A relatively large problem here is the detection of scenarios of cyber threats and their expression in time. This paper focuses on the design of an algorithm that can be applied to the field of cyber-threat assessment in order to express the financial impacts. The study is based on an in-depth analysis of the insurance industry. The results obtained in our research show the importance of the time perspective for determining the potential financial impacts of cyber threats for the field of insurance.Univerzita Tomáše Bati ve Zlíně: RVO/FLKŘ/2022/03Tomas Bata University in Zlin; [RVO/FLKR/2022/03
Knowledge and technological innovations in the context of tourists' spending in OECD countries
Get PDFTourism is one of those segments where the effect of implemented innovations tends to show relatively quickly. The presented study aims to assess the links between knowledge and technological innovation and tourists' spending in a sample of developed countries. To this end, the research relied on annual data (2010-2019) from selected OECD countries (n = 36). Data presenting the innovation potential (Knowledge & technology Global Innovation Index) of selected countries (knowledge creation, impact of knowledge, and knowledge diffusion) was included in the analyzes. Four indicators represented tourism: Business Tourism Spending, Leisure Tourism Spending, Domestic Tourism Spending, Visitor Exports -Foreign spending. The panel regression analysis showed that demonstrable links were proved only for some assumptions, while the identified effects acquired negative trajectories, i.e., in countries where higher tourist spending was identified, lower outputs of innovation activities in the examined areas can be expected. In addition, significant negative links were discovered between the indicators of the creation of knowledge and visitor exports, as well as the dissemination of knowledge and domestic tourism spending. For more accurate results, further analyzes and examinations of interconnections in a different country structure are needed