České Budějovice, Czech Republic
České Budějovice, Czech Republic

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Weiss V.,Institute of Technology and Business in Ceske Budejovice
METAL 2016 - 25th Anniversary International Conference on Metallurgy and Materials, Conference Proceedings | Year: 2016

In the course of homogenizing annealing of aluminum alloys being cast continually or semi-continually it appears that chemical inhomogeneity takes off within separate dendritic cells (crystal segregation). It is about a diffusional process that takes place at the temperature which approaches the liquid temperature of the material. In that process the transition of soluble intermetallic compounds and eutectic to solid solution occurs and it suppresses crystal segregation significantly. Temperature, homogenization time, the size of dendritic cells and diffusion length influence homogenizing process. The article explores the optimization of homogenizing process in terms of its time and homogenizing annealing temperature which influence mechanical properties of AlZn5.5Mg2.5Cu1.5 alloy.


Stopka O.,Institute of Technology and Business in Ceske Budejovice | Bartuska L.,Institute of Technology and Business in Ceske Budejovice | Kubasakova I.,University of Zilina
Intelligent Technologies in Logistics and Mechatronics Systems, ITELMS 2014 - Proceedings of the 9th International Conference | Year: 2014

The paper presents the selecting the most suitable region in the selected country for the placement of the bi-modal (railroad) freight village using the WSA method. The first part of the paper outlines the introduction to the given issue and the brief description of the WSA method. The second part describes the identification of the variants (regions) and the establishment of the evaluation criteria. The third part of the paper includes the creation of the criteria matrix and the last part provides the determination of the most suitable region in the selected country for the placement of the bi-modal freight village. © 2014 Kaunas University of Technology


Stopka O.,Institute of Technology and Business in Ceske Budejovice | Kampf R.,Institute of Technology and Business in Ceske Budejovice | Kolar J.,Institute of Technology and Business in Ceske Budejovice | Kubasakova I.,University of Zilina
Nase More | Year: 2014

This paper aims at identification of appropriate multi-criteria analysis methods for allocation tasks of logistics objects in a certain area. The given type of tasks (allocation tasks) can be seen as a decision problem; for this type of task the multi-criteria analysis methods is used. The first part of this paper presents a brief introduction to the given issue. The second part of the paper includes characteristics of the general procedure for multi-criteria evaluation of the variants. The third part includes an overview of utilized methods for determining criteria weightings and methods of selection of the most suitable variant. The forth part presents the summary of the described methods, identification of appropriate methods for a given type of task and a model example for determination of criteria weightings.


Stopka O.,Institute of Technology and Business in Ceske Budejovice | Kampf R.,Institute of Technology and Business in Ceske Budejovice
Transport | Year: 2016

The main advantages of maritime transport are (1) lowest costs, (2) large-scale carriage capacity, (3) carriage of different goods over long distances and (4) the most acceptable mode of transport in the context of the environment. This mode of transport is considered more profitable and more cost-effective than all other transport modes. Modern maritime ports have become the essential nodal components of freight transport networks. This paper is focused on determining the most suitable layout of space for the loading units warehousing and handling in the maritime port using the particular method. In the paper, four types of layout and five criteria were taken into account. Layout of warehousing and handling space can affect the entire transport process and can have a great effect on the economics of enterprises. © 2016 Vilnius Gediminas Technical University (VGTU) Press


Svec R.,Institute of Technology and Business in Ceske Budejovice | Solarova P.,Institute of Technology and Business in Ceske Budejovice
Proceedings of the 27th International Business Information Management Association Conference - Innovation Management and Education Excellence Vision 2020: From Regional Development Sustainability to Global Economic Growth, IBIMA 2016 | Year: 2016

This paper deals with the topic of Food Tourism and its connection with the local gastronomic products. It compares the demand for the local food in retail stores and in catering establishments: a distinct disproportion between the customers' willingness to find out information about the food origin, while shopping in a store in comparison with buying the food in the catering establishments. The aim of the paper was to identify possible problems in the perception of local food by tourists and to recognize their role when assessing the offer in the catering establishments in the studied area. The conclusion indicates other possibilities for the offer of local food which can be usable for catering establishments. The findings are based on data obtained through questionnaires. Copyright © 2016 International Business Information Management Association


Senitkova I.,Institute of Technology and Business in Ceske Budejovice | Kraus M.,Institute of Technology and Business in Ceske Budejovice
CESB 2016 - Central Europe Towards Sustainable Building 2016: Innovations for Sustainable Future | Year: 2016

Emissions and odors from different interior material surfaces were investigated. The individual materials and material combination impact on perceived indoor air quality for various testing materials are presented in this paper. Selected materials comparison reveals new fact regarding the TVOCs concentration. The using possibility of individual material surfaces sorption ability was investigated. The chemical analysis and sensory assessments identifies health adverse of indoor air pollutants (TVOCs). The knowledge of targeted sorption effect can be used already in the interior design phase. The results demonstrate the various sorption abilities of various indoor materials as well as various sorption ability of the same indoor material in various combinations.


Jelinek J.,Institute of Technology and Business in Ceske Budejovice
Komunikacie | Year: 2014

This contribution deals with modelling and simulation of a transport system of a public transport line as one of the ways leading to deeper insight into the system and thus also to its development and its quality and effectiveness improvement. Professional software for simulation model creation was used for implementation of the model. Questions related to accessibility of real data for the model setting and their processing will also be discussed.


This article describes a design of solving ship transport optimization using tools from graph theory. The tool minimal spanning tree (denote MST) is suitable for searching ideal transport routes between the ports. The principle of the MST problem is that it describes various kinds of situations where it is necessary to use this theoretical instrument and how to use this tool for finding a solution. Graph theory knows several algorithms for searching the minimum spanning tree and this article compares two of them, in terms of their different approaches, their complementarity, and their assessment, and which of these two methods can find a feasible solution faster. To model the situation of ship transportation we use connected weighted graph where vertices represent sea ports and the edges represent the transport routes between the ports. The weight of an edge represents energy consumed to drive the boat between two ports. A theoretical discussion and a model example are carried out to compare the two methods. © 2016, University of Dubronvnik. All rights reserved.


Vysoka J.,Institute of Technology and Business in Ceske Budejovice
Nase More | Year: 2016

In this article, we will discuss a problem of open sea sailing on a yacht. The yacht will be heading to a set point that is positioned upwind from the yacht. We will create a mathematical model and find the optimal starting direction for the yacht, so that it reaches the set point in shortest time possible. © 2016, University of Dubronvnik. All rights reserved.


Jelinek J.,Institute of Technology and Business in Ceske Budejovice
ICAART 2014 - Proceedings of the 6th International Conference on Agents and Artificial Intelligence | Year: 2014

Social networks are currently one of the most studied structures for information and knowledge exchange. These structures are very well described in terms of their static structure, this article attempts to propose the model of their dynamic behavior and the spread of information and knowledge in these networks. The heuristic event based model of the individual behavior in the network using the message passing will be presented. The main idea of the model is agent's need for information and knowledge in specific situations. On that is based multiagent model of the social network used for information exchange, which has been practically implemented and will be presented as well as some of its simulation outputs for tasks testing the dynamics of social networks. Copyright © 2014 SCITEPRESS.

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