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Pavlovic A.,Moravian University College Olomouc | Pavlovic A.,Comenius University | Krausko M.,Comenius University | Libiakova M.,Comenius University | Adamec L.,Academy of Sciences of the Czech Republic
Annals of Botany | Year: 2014

Backround and AimsIt has been suggested that the rate of net photosynthesis (AN) of carnivorous plants increases in response to prey capture and nutrient uptake; however, data confirming the benefit from carnivory in terms of increased AN are scarce and unclear. The principal aim of our study was to investigate the photosynthetic benefit from prey capture in the carnivorous sundew Drosera capensis.MethodsPrey attraction experiments were performed, with measurements and visualization of enzyme activities, elemental analysis and pigment quantification together with simultaneous measurements of gas exchange and chlorophyll a fluorescence in D. capensis in response to feeding with fruit flies (Drosophila melanogaster).Key ResultsRed coloration of tentacles did not act as a signal to attract fruit flies onto the traps. Phosphatase, phophodiesterase and protease activities were induced 24 h after prey capture. These activities are consistent with the depletion of phosphorus and nitrogen from digested prey and a significant increase in their content in leaf tissue after 10 weeks. Mechanical stimulation of tentacle glands alone was not sufficient to induce proteolytic activity. Activities of β-D-glucosidases and N-acetyl-β-D-glucosaminidases in the tentacle mucilage were not detected. The uptake of phosphorus from prey was more efficient than that of nitrogen and caused the foliar N:P ratio to decrease; the contents of other elements (K, Ca, Mg) decreased slightly in fed plants. Increased foliar N and P contents resulted in a significant increase in the aboveground plant biomass, the number of leaves and chlorophyll content as well as AN, maximum quantum yield (Fv/Fm) and effective photochemical quantum yield of photosystem II (ΦPSII). ConclusionsAccording to the stoichiometric relationships among different nutrients, the growth of unfed D. capensis plants was P-limited. This P-limitation was markedly alleviated by feeding on fruit flies and resulted in improved plant nutrient status and photosynthetic performance. This study supports the original cost/benefit model proposed by T. Givnish almost 30 years ago and underlines the importance of plant carnivory for increasing phosphorus, and thereby photosynthesis. © The Author 2013.


Mandal B.,Visva Bharati University | Sarkar S.,Visva Bharati University | Sarkar S.,Moravian University College Olomouc | Sarkar P.,Visva Bharati University
Journal of Physical Chemistry C | Year: 2015

We present results of our theoretical investigation on the electronic structure of porphyrin functionalized graphene quantum dots(GQDs). We put our emphasis on how the electronic energy levels of GQDs are modified because of the functionalization by porphyrin molecules. Our study shows that the HOMO-LUMO gap of the GQD-porphyrin hybrid material is lower as compared to GQD of same size. The possibility of forming type-II nanohybrids is explored by varying either the size of the QD or by attaching different functional groups to the porphyrin moiety. We also analyzed the absorption spectra of one model GQD-porphyrin nanocomposite. We found that GQD-porphyrin hybrid material form type-II band alignment for GQD of smaller size. The hybrid material with larger QDs show type-I band alignment however they can be made type-II by proper attachment of the electron donating group to the porphyrin molecule. The type-II band alignment lowers the chance of electron-hole recombination. The free energy of electron injection, that is, the energy gap between LUMO of porphyrin and LUMO of GQD increases with increasing the size of the GQD. So, on the basis of our theoretical study, we suggest that the GQD-porphyrin nanohybrid material with larger GQD may be a good candidate for the application in solar cell. © 2015 American Chemical Society.


Cermak P.,Silesian University in Opava | Pokorny M.,Moravian University College Olomouc
2013 18th International Conference on Methods and Models in Automation and Robotics, MMAR 2013 | Year: 2013

The Fuzzy-neural development system is presented in two versions. The First version is the implementation in C, C++ with interface to Matlab or other programs using DLL calling. The second implementation is newer, conform to Referential transparency. For implementation we choose functional programing language Scheme. The Scheme version R5RS is adopted on different platforms like PC, microprocessors and FPGAs. This allows easy transfer of Scheme code on mentioned platforms. There is presented short programming example of Takagi Sugeno Kang fuzzy rule based model in form of the Fuzzy Neural Network. The possible applicatons of the proposed development system are presented. © 2013 West Pomeranian University of Technology.


Khitilova E.,Moravian University College Olomouc | Pokorny M.,Moravian University College Olomouc
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis | Year: 2015

The paper focuses on the issue of choice of suppliers in the market environment. It discusses expert systems as modern methods of its computer support. The issue of supplier choice is presented and viewpoints for the formulation of the decision-making task introduced. The piece of writing furthermore pinpoints the expert character of the solution of this task, making use of the knowledge of experienced professionals. It introduces the principles of fuzzy oriented expert systems as a suitable solution of the task at hand. Language models of the expert systems formalise the high quality mental models of an experienced expert. The global decision-making task is split into partial tasks; the expert modules for their formalisation are integrated into the hierarchic structure. The paper presents the structures of language models and the implementation of the structure of expert systems in the MATLAB-Simulink program environment. Special attention is paid to the issue of supplier flexibility. The efficiency of the decision-making system is proven by the solution of a simulation exercise which represents the classification of two current and two newly contemplated suppliers with various characteristics. The results are analysed and commented on.


Zimmermannova J.,Moravian University College Olomouc
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis | Year: 2015

This paper is focused on the first ex-post analysis of the EU ETS in its 3rd trading period in the Czech Republic, based on the analysis of the behaviour of the key EU ETS sector - combustion processes - and the decision making of Czech electricity and heat producers within the EU ETS. Firstly, the general overview of the EU ETS is presented, including the important scientific studies in this area. The characteristics of the EU ETS in the Czech Republic are described. The second chapter, methodology and data, describes the method, the questionnaire survey. The key chapter, results, focuses on the most important outputs obtained from the questionnaire survey. The discussion part deals with particular characteristics of the EU ETS in the 3rd trading period in the Czech Republic. Focusing on the behaviour of Czech companies in the analyzed period, it is obvious, that the companies within the combustion processes group understood the EU ETS much more as an additional environmental tax or fee, instead of commodity, which can be traded on the exchange. Moreover, the EU ETS had no impact on their environmental investments planning in years 2013 and 2014.


Khitilova E.,Moravian University College Olomouc | Jurova M.,Brno University of Technology
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis | Year: 2014

The present paper is concerned with the following questions: what are the advantages and disadvantages of the method of complex evaluation (MCE) scoring model as compared with that designed by Tomek. Both scoring models are compared (MCE and Tomek) presenting the results using a simple illustrative case study. The criteria for evaluating the scoring model variants include: the amount of information necessary, level of difficulty, details of the results, the object comparison. A single illustrative case study is used. This paper is concerned with presenting the scoring model for evaluating the existing suppliers in the first instance for production enterprises. Other existing scoring-models aren't present and compare. This paper aims to compare the scoring model by Tomek and that of the method of complex evaluation (MCE) by Chytilova. Other scientific aim of this paper consists in the description of business conditions which MCE is suitable. The result of this paper is the description of differences in evaluation processes between two scoring-models (by Tomek and MCE) presenting the advantages and disadvantages of MCE. The comparison of the scoring model variants focuses on formulating the conditions of business under which MCE is more suitable than the scoring-model by Tomek. This paper is concentrates on middle-sized production enterprises. It is oriented towards the evaluation of suppliers in the first instance. It only compares the supplier evaluation processes used by the enterprises. For illustration purposes data from enterprise managements are used. Only the existing suppliers are evaluated in this paper. © 2014, Mendel University of Agriculture and Forestry Brno. All rights reserved.


Keprt A.,Moravian University College Olomouc
Advances in Intelligent Systems and Computing | Year: 2014

The benefit of each key algorithm also depends on many additional supporting algorithms it uses. It turned out that class of problems related to dimensionality reduction of binary spaces used for statistical analysis of binary data, e.g. binary (Boolean) factor analysis, is dependent on the possibility and ability of performing pseudo-division of binary matrices. The paper presents novelty computation approach to it, giving an algorithm for reasonably fast exact solution. © Springer International Publishing Switzerland 2014.


Kitner M.,Moravian University College Olomouc | Prausova R.,University of Hradec Kralove | Adamec L.,Academy of Sciences of the Czech Republic
Phyton - Annales Rei Botanicae | Year: 2013

According to the European Red list, Potamogeton praelongus Wulfen (Pota-mogetonaceae) is a Least Concern species predominantly distributed throughout northern Europe, Asia and North America. It is considered a critically endangered species in the Czech Republic, with the last natural population in a standing oxbow in the Orlice river floodplain at Malšova Lhota, near Hradec Králové in E Bohemia. In this study, the genetic diversity of plants from natural and introduced Czech populations as well as a rescue culture was determined using AFLP analyses. At these sites, despite prolific flowering and seed setting, it propagates only vegeta-tively as seed germination is apparently extremely rare if any. The analyses revealed a very low genetic diversity in existing Czech micropopulations suggesting a predominant clonal propagation within the natural populations. This may also be a result in the course of ongoing repatriation of in vitro micropropagated plants. However, we observed differences in the genetic profiles and higher genetic diversity in plant individuals raised from seeds (obtained from rescue cultures) produced by sexual reproduction. Trying to obtain seeds could be utilized to increase the genetic diversity within natural and newly established populations. Other aspects of successful conservation of this species are also discussed.


Zimmermannova J.,Moravian University College Olomouc
Transportation Research Part A: Policy and Practice | Year: 2012

Currently, the influence of transportation and its impact on environmental indicators throughout the world are increasing; however, governments of particular countries try to implement new economic instruments with the expectations of changing people's behaviour or at least environmental parameters of the motor vehicle fleet. The Government of the Czech Republic introduced a new economic instrument, which came into force on 1 January 2009 and was inspired by similar environmental taxes in Member States of the European Union - the car registration fee, which is based on emission parameters of cars. The main target of this fee has been to change the structure of the passenger car fleet in the Czech Republic, particularly to support new registrations of new passenger cars with better environmental characteristics and to decrease the share of new registrations of used passenger cars. This article focuses on an ex-post analysis of impacts of the car registration fee on the structure of the passenger car fleet in the Czech Republic and its environmental characteristics in the first 3. years after the legal mandate of the fee. The case study is based on a correlation analysis and an analysis of statistical data from official sources in the Czech Republic. The impacts of the car registration fee on both the structure of the passenger car fleet in the Czech Republic and the environmental characteristics of new registrations are significant. For the first time since 2004, the number of new registrations of new cars was higher in the period 2009-2011 than the number of new registrations of used cars. Moreover, the share of alternative fuel cars in the passenger car market is increasing and the emissions from private car transport are decreasing. © 2012 Elsevier Ltd.


Zapletalova S.,Moravian University College Olomouc
Proceedings of the 24th International Business Information Management Association Conference - Crafting Global Competitive Economies: 2020 Vision Strategic Planning and Smart Implementation | Year: 2014

The foreign market entry selection is highly significant for the company's future performance. Selecting the right foreign entry mode is an important decision, which demands a lot of resources and thorough planning. The factors influencing company's choice of entry mode are divided into two main groups subsuming-external and internal factors. External factors consist of determinants regarding the company's environment while the internal ones are determined by the company's specific factors. The objective of this paper is to present an application of the entry modes of the selected Czech entrepreneurial subjects. The companies included in the study are those that have undertaken internationalization activities and are incorporated in the Czech Republic. There were a total of 297 enterprises that participated in the research. The research method was an oral questioning and the main instrument was a questionnaire. A relatively low degree of Czech companies'-that have undergone internationalization has resulted in the dominance of the least advanced forms of internationalization expansion, mainly exports with a small share of more advanced forms of foreign direct investments and a very low level of forms of international cooperation. Czech companies are in decision about the choosing the foreign entry mode influenced by the many factors. The greatest influence on the choice of foreign entry mode has entry mode variables. Entry mode variables constitute variables assessment characteristics of particular entry mode. Among the characteristics can be included flexibility of the method, risk of the method and degree of the method control.

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