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Kopecky</title> <meta name="description" content="Search results for: Vaclav Kopecky"> <meta name="keywords" content="Vaclav Kopecky"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler 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id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Vaclav Kopecky"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 24</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Vaclav Kopecky</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">24</span> Measuring the Cavitation Cloud by Electrical Impedance Tomography</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Michal%20Malik">Michal Malik</a>, <a href="https://publications.waset.org/abstracts/search?q=Jiri%20Primas"> Jiri Primas</a>, <a href="https://publications.waset.org/abstracts/search?q=Darina%20Jasikova"> Darina Jasikova</a>, <a href="https://publications.waset.org/abstracts/search?q=Michal%20Kotek"> Michal Kotek</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Kopecky"> Vaclav Kopecky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper is a case study dealing with the viability of using Electrical Impedance Tomography for measuring cavitation clouds in a pipe setup. The authors used a simple passive cavitation generator to cause a cavitation cloud, which was then recorded for multiple flow rates using electrodes in two measuring planes. The paper presents the results of the experiment, showing the used industrial grade tomography system ITS p2+ is able to measure the cavitation cloud and may be particularly useful for identifying the inception of cavitation in setups where other measuring tools may not be viable. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cavitation%20cloud" title="cavitation cloud">cavitation cloud</a>, <a href="https://publications.waset.org/abstracts/search?q=conductivity%20measurement" title=" conductivity measurement"> conductivity measurement</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20impedance%20tomography" title=" electrical impedance tomography"> electrical impedance tomography</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanically%20induced%20cavitation" title=" mechanically induced cavitation"> mechanically induced cavitation</a> </p> <a href="https://publications.waset.org/abstracts/84715/measuring-the-cavitation-cloud-by-electrical-impedance-tomography" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84715.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">248</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">23</span> Measuring of the Volume Ratio of Two Immiscible Liquids Using Electrical Impedance Tomography</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jiri%20Primas">Jiri Primas</a>, <a href="https://publications.waset.org/abstracts/search?q=Michal%20Malik"> Michal Malik</a>, <a href="https://publications.waset.org/abstracts/search?q=Darina%20Jasikova"> Darina Jasikova</a>, <a href="https://publications.waset.org/abstracts/search?q=Michal%20Kotek"> Michal Kotek</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Kopecky"> Vaclav Kopecky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Authors of this paper discuss the measuring of volume ratio of two immiscible liquids in the homogenous mixture using the industrial Electrical Impedance Tomography (EIT) system ITS p2+. In the first part of the paper, the principle of EIT and the basic theory of conductivity of mixture of two components are stated. In the next part, the experiment with water and olive oil mixed with Rushton turbine is described, and the measured results are used to verify the theory. In the conclusion, the results are discussed in detail, and the accuracy of the measuring method and its advantages are also mentioned. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=conductivity" title="conductivity">conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20impedance%20tomography" title=" electrical impedance tomography"> electrical impedance tomography</a>, <a href="https://publications.waset.org/abstracts/search?q=homogenous%20mixture" title=" homogenous mixture"> homogenous mixture</a>, <a href="https://publications.waset.org/abstracts/search?q=mixing%20process" title=" mixing process"> mixing process</a> </p> <a href="https://publications.waset.org/abstracts/84692/measuring-of-the-volume-ratio-of-two-immiscible-liquids-using-electrical-impedance-tomography" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84692.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">402</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">22</span> Measurement of Rheologic Properties of Soft Tissue (Muscle Tissue) by Device Called Myotonometer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Petr%20Sifta">Petr Sifta</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Bittner"> Vaclav Bittner</a>, <a href="https://publications.waset.org/abstracts/search?q=Martin%20Kysela"> Martin Kysela</a>, <a href="https://publications.waset.org/abstracts/search?q=Matej%20Kolar"> Matej Kolar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of the research described in this work is to answer how to measure the rheologic (viscoelastic) properties tendo–deformational characteristics of soft tissue. The method would also resemble muscle palpation examination as it is known in clinical practice. For this purpose, an instrument with the working name “myotonometer” has been used. At present, there is lack of objective methods for assessing the muscle tone by viscous and elastic properties of soft tissue. That is why we decided to focus on creating or finding quantitative and qualitative methodology capable of specifying muscle tone. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rheologic%20properties" title="rheologic properties">rheologic properties</a>, <a href="https://publications.waset.org/abstracts/search?q=tendo%E2%80%93deformational%20characteristics" title=" tendo–deformational characteristics"> tendo–deformational characteristics</a>, <a href="https://publications.waset.org/abstracts/search?q=viscosity" title=" viscosity"> viscosity</a>, <a href="https://publications.waset.org/abstracts/search?q=elasticity" title=" elasticity"> elasticity</a>, <a href="https://publications.waset.org/abstracts/search?q=hypertonus" title=" hypertonus"> hypertonus</a> </p> <a href="https://publications.waset.org/abstracts/34403/measurement-of-rheologic-properties-of-soft-tissue-muscle-tissue-by-device-called-myotonometer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34403.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">623</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">21</span> Implementation of the Recursive Formula for Evaluation of the Strength of Daniels' Bundle</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Sadilek">Vaclav Sadilek</a>, <a href="https://publications.waset.org/abstracts/search?q=Miroslav%20Vorechovsky"> Miroslav Vorechovsky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper deals with the classical fiber bundle model of equal load sharing, sometimes referred to as the Daniels' bundle or the democratic bundle. Daniels formulated a multidimensional integral and also a recursive formula for evaluation of the strength cumulative distribution function. This paper describes three algorithms for evaluation of the recursive formula and also their implementations with source codes in high-level programming language Python. A comparison of the algorithms are provided with respect to execution time. Analysis of orders of magnitudes of addends in the recursion is also provided. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=equal%20load%20sharing" title="equal load sharing">equal load sharing</a>, <a href="https://publications.waset.org/abstracts/search?q=mpmath" title=" mpmath"> mpmath</a>, <a href="https://publications.waset.org/abstracts/search?q=python" title=" python"> python</a>, <a href="https://publications.waset.org/abstracts/search?q=strength%20of%20Daniels%27%20bundle" title=" strength of Daniels' bundle"> strength of Daniels' bundle</a> </p> <a href="https://publications.waset.org/abstracts/27514/implementation-of-the-recursive-formula-for-evaluation-of-the-strength-of-daniels-bundle" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27514.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">404</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">20</span> Plasma Treatment of a Lignite Using Water-Stabilized Plasma Torch at Atmospheric Pressure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anton%20Serov">Anton Serov</a>, <a href="https://publications.waset.org/abstracts/search?q=Alan%20Maslani"> Alan Maslani</a>, <a href="https://publications.waset.org/abstracts/search?q=Michal%20Hlina"> Michal Hlina</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20Kopecky"> Vladimir Kopecky</a>, <a href="https://publications.waset.org/abstracts/search?q=Milan%20Hrabovsky"> Milan Hrabovsky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recycling of organic waste is an increasingly hot topic in recent years. This issue becomes even more interesting if the raw material for the fuel production can be obtained as the result of that recycling. A process of high-temperature decomposition of a lignite (a non-hydrolysable complex organic compound) was studied on the plasma gasification reactor PLASGAS, where water-stabilized plasma torch was used as a source of high enthalpy plasma. The plasma torch power was 120 kW and allowed heating of the reactor to more than 1000 °C. The material feeding rate in the gasification reactor was selected 30 and 60 kg per hour that could be compared with small industrial production. An efficiency estimation of the thermal decomposition process was done. A balance of the torch energy distribution was studied as well as an influence of the lignite particle size and an addition of methane (CH4) in a reaction volume on the syngas composition (H2+CO). It was found that the ratio H2:CO had values in the range of 1,5 to 2,5 depending on the experimental conditions. The recycling process occurred at atmospheric pressure that was one of the important benefits because of the lack of expensive vacuum pump systems. The work was supported by the Grant Agency of the Czech Republic under the project GA15-19444S. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=atmospheric%20pressure" title="atmospheric pressure">atmospheric pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=lignite" title=" lignite"> lignite</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20treatment" title=" plasma treatment"> plasma treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=water-stabilized%20plasma%20torch" title=" water-stabilized plasma torch"> water-stabilized plasma torch</a> </p> <a href="https://publications.waset.org/abstracts/47529/plasma-treatment-of-a-lignite-using-water-stabilized-plasma-torch-at-atmospheric-pressure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47529.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">373</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19</span> Evaluation of Fatigue Crack Growth Rate in Weldments</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pavel%20Zlabek">Pavel Zlabek</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Mentl"> Vaclav Mentl</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The fatigue crack growth rate evaluation is a basic experimental characteristic when assessment o f the remaining lifetime is needed. Within the repair welding technology project, the crack growth rate at cyclic loading was measured in base and weld metals and in the situation when cracks were initiated in base metal and grew into the weld metal through heat-affected zone and back to the base metal. Two welding technologies were applied and specimens in as-welded state and after heat treatment were tested. Fatigue crack growth rate measurement was performed on CrMoV pressure vessel steel and the tests were performed at room temperature. The crack growth rate was measured on CCT test specimens (see figure) for both the base and weld metals and also in the case of crack subsequent transition through all the weld zones. A 500 kN MTS controlled electro-hydraulic testing machine and Model 632.13C-20 MTS extensometer were used to perform the tests. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cracks" title="cracks">cracks</a>, <a href="https://publications.waset.org/abstracts/search?q=fatigue" title=" fatigue"> fatigue</a>, <a href="https://publications.waset.org/abstracts/search?q=steels" title=" steels"> steels</a>, <a href="https://publications.waset.org/abstracts/search?q=weldments" title=" weldments"> weldments</a> </p> <a href="https://publications.waset.org/abstracts/25231/evaluation-of-fatigue-crack-growth-rate-in-weldments" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25231.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">522</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18</span> Effect of Structure on Properties of Incrementally Formed Titanium Alloy Sheets</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lucie%20Novakova">Lucie Novakova</a>, <a href="https://publications.waset.org/abstracts/search?q=Petr%20Homola"> Petr Homola</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Kafka"> Vaclav Kafka</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Asymmetric incremental sheet forming (AISF) could significantly reduce costs incurred by the fabrication of complex industrial components with a minimal environmental impact. The AISF experiments were carried out on commercially pure titanium (Ti-Gr2), Timetal (15-3-3-3) alloy, and Ti-6Al-4V (Ti-Gr5) alloy. A special testing geometry was used to characterize the titanium alloys properties from the point of view of the forming zone and titanium structure effect. The structure and properties of the materials were assessed by means of metallographic analyses and microhardness measurements.The highest differences in the parameters assessed as a function of the sampling zone were observed in the case of alpha-phase Ti-Gr2at the expense of the most substantial sheet thinning occurrence. A springback causes a smaller stored deformation in Timetal (β alloy) resulting in less pronounced microstructure refinement and microhardness increase. Ti-6Al-4V alloy exhibited early failure due to its poor formability at ambient temperature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=incremental%20forming" title="incremental forming">incremental forming</a>, <a href="https://publications.waset.org/abstracts/search?q=metallography" title=" metallography"> metallography</a>, <a href="https://publications.waset.org/abstracts/search?q=hardness" title=" hardness"> hardness</a>, <a href="https://publications.waset.org/abstracts/search?q=titanium%20alloys" title=" titanium alloys"> titanium alloys</a> </p> <a href="https://publications.waset.org/abstracts/5510/effect-of-structure-on-properties-of-incrementally-formed-titanium-alloy-sheets" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5510.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">450</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">17</span> Supernatural Beliefs Impact Pattern Perception</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Silvia%20Boschetti">Silvia Boschetti</a>, <a href="https://publications.waset.org/abstracts/search?q=Jakub%20Binter"> Jakub Binter</a>, <a href="https://publications.waset.org/abstracts/search?q=Robin%20Kopeck%C3%BD"> Robin Kopecký</a>, <a href="https://publications.waset.org/abstracts/search?q=Lenka%20P%C5%99%C3%ADPlatov%C3%A1"> Lenka PříPlatová</a>, <a href="https://publications.waset.org/abstracts/search?q=Jaroslav%20Flegr"> Jaroslav Flegr</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A strict dichotomy was present between religion and science, but recently, cognitive science focusses on the impact of supernatural beliefs on cognitive processes such as pattern recognition. It has been hypothesized that cognitive and perceptual processes have been under evolutionary pressures that ensured amplified perception of patterns, especially when in stressful and harsh conditions. The pattern detection in religious and non-religious individuals after induction of negative, anxious mood shall constitute a cornerstone of the general role of anxiety, cognitive bias, leading towards or against the by-product hypothesis, one of the main theories on the evolutionary studies of religion. The apophenia (tendencies to perceive connection and meaning on unrelated events) and perception of visual patterns (or pateidolia) are of utmost interest. To capture the impact of culture and upbringing, a comparative study of two European countries, the Czech Republic (low organized religion participation, high esoteric belief) and Italy (high organized religion participation, low esoteric belief), are currently in the data collection phase. Outcomes will be presented at the conference. A battery of standardized questionnaires followed by pattern recognition tasks (the patterns involve color, shape, and are of artificial and natural origin) using an experimental method involving the conditioning of (controlled, laboratory-induced) stress is taking place. We hypothesize to find a difference between organized religious belief and personal (esoteric) belief that will be alike in both of the cultural environments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=culture" title="culture">culture</a>, <a href="https://publications.waset.org/abstracts/search?q=esoteric%20belief" title=" esoteric belief"> esoteric belief</a>, <a href="https://publications.waset.org/abstracts/search?q=pattern%20perception" title=" pattern perception"> pattern perception</a>, <a href="https://publications.waset.org/abstracts/search?q=religiosity" title=" religiosity"> religiosity</a> </p> <a href="https://publications.waset.org/abstracts/139635/supernatural-beliefs-impact-pattern-perception" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/139635.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">185</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">16</span> Use of Social Networks and Mobile Technologies in Education</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V%C3%A1clav%20Man%C4%9Bna">Václav Maněna</a>, <a href="https://publications.waset.org/abstracts/search?q=Roman%20Dost%C3%A1l"> Roman Dostál</a>, <a href="https://publications.waset.org/abstracts/search?q=%C5%A0t%C4%9Bp%C3%A1n%20Hub%C3%A1lovsk%C3%BD"> Štěpán Hubálovský</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Social networks play an important role in the lives of children and young people. Along with the high penetration of mobile technologies such as smartphones and tablets among the younger generation, there is an increasing use of social networks already in elementary school. The paper presents the results of research, which was realized at schools in the Hradec Králové region. In this research, the authors focused on issues related to communications on social networks for children, teenagers and young people in the Czech Republic. This research was conducted at selected elementary, secondary and high schools using anonymous questionnaires. The results are evaluated and compared with the results of the research, which has been realized in 2008. The authors focused on the possibilities of using social networks in education. The paper presents the possibility of using the most popular social networks in education, with emphasis on increasing motivation for learning. The paper presents comparative analysis of social networks, with regard to the possibility of using in education as well. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=social%20networks" title="social networks">social networks</a>, <a href="https://publications.waset.org/abstracts/search?q=motivation" title=" motivation"> motivation</a>, <a href="https://publications.waset.org/abstracts/search?q=e-learning" title=" e-learning"> e-learning</a>, <a href="https://publications.waset.org/abstracts/search?q=mobile%20technology" title=" mobile technology"> mobile technology</a> </p> <a href="https://publications.waset.org/abstracts/61088/use-of-social-networks-and-mobile-technologies-in-education" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61088.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">313</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15</span> X-Ray Diffraction Technique as a Means for Degradation Assessment of Welded Joints </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jaroslav%20Fiala">Jaroslav Fiala</a>, <a href="https://publications.waset.org/abstracts/search?q=Jaroslav%20Kaiser"> Jaroslav Kaiser</a>, <a href="https://publications.waset.org/abstracts/search?q=Pavel%20Zlabek"> Pavel Zlabek</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Mentl"> Vaclav Mentl</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The X-ray diffraction technique was recognized as a useful tool for the assessment of material degradation degree after a long-time service. In many industrial applications materials are subjected to degradation of mechanical properties as a result of real service conditions. The assessment of the remnant lifetime of components and structures is commonly based on correlated procedures including numerous destructive, non-destructive and mathematical techniques that should guarantee reasonable precise assessment of the current damage extent of materials in question and the remnant lifetime assessment. This paper summarizes results of an experimental programme concentrated on mechanical properties degradation of welded components. Steel an Al-alloy test specimens of base metal, containing welds and simple weldments were fatigue loaded at room temperature to obtain Woehler S-N curve. X-ray diffraction technique was applied to assess the degradation degree of material as a result of cyclic loading. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fatigue%20loading" title="fatigue loading">fatigue loading</a>, <a href="https://publications.waset.org/abstracts/search?q=material%20degradation" title=" material degradation"> material degradation</a>, <a href="https://publications.waset.org/abstracts/search?q=steels" title=" steels"> steels</a>, <a href="https://publications.waset.org/abstracts/search?q=AL-alloys" title=" AL-alloys"> AL-alloys</a>, <a href="https://publications.waset.org/abstracts/search?q=X-ray%20diffraction" title=" X-ray diffraction "> X-ray diffraction </a> </p> <a href="https://publications.waset.org/abstracts/25238/x-ray-diffraction-technique-as-a-means-for-degradation-assessment-of-welded-joints" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25238.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">439</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">14</span> Testing of Small Local Zones by Means of Small Punch Test at Room and Creep Temperatures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Mentl">Vaclav Mentl</a>, <a href="https://publications.waset.org/abstracts/search?q=Josef%20Volak"> Josef Volak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In many industrial applications, materials are subjected to degradation of mechanical properties as a result of real service conditions, temperature, cyclic loading, humidity or other corrosive media, irradiation, their combination etc. The assessment of the remaining lifetime of components and structures is commonly based on correlated procedures including numerous destructive, non-destructive and mathematical techniques that should guarantee reasonably precise assessment of the current damage extent of materials in question and the remaining lifetime evaluation of the component under consideration. The answers to demands of customers to extend the lifetime of existing components beyond their original design life must be based on detailed assessment of the current degradation extent, what can be rarely realised by means of traditional mechanical (standardised) tests that need relatively large volumes of representative material for the test specimen manufacturing. This fact accelerated the research of miniaturised test specimen that can be sampled non-invasively from the component. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=small%20punch%20test" title="small punch test">small punch test</a>, <a href="https://publications.waset.org/abstracts/search?q=correlation" title=" correlation"> correlation</a>, <a href="https://publications.waset.org/abstracts/search?q=creep" title=" creep"> creep</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a> </p> <a href="https://publications.waset.org/abstracts/51445/testing-of-small-local-zones-by-means-of-small-punch-test-at-room-and-creep-temperatures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/51445.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">275</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13</span> Changes in Physical Soil Properties and Crop Status on Soil Enriched With Treated Manure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Novak">Vaclav Novak</a>, <a href="https://publications.waset.org/abstracts/search?q=Katerina%20Krizova"> Katerina Krizova</a>, <a href="https://publications.waset.org/abstracts/search?q=Petr%20Sarec"> Petr Sarec</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Modern agriculture has to face many issues from which soil degradation and lack of organic matter in the soil are only a few of them. Apart from Climate Change, human utilization of landscape is the cause of a majority part of these problems. Cattle production in Czechia has been reduced by more than half in recent 30 years. However, cattle manure is considered as staple organic fertilizer, and its role in attempts for sustainable agriculture is irreplaceable. This study aims to describe the impact of so-called activators of biological manure transformation (Z´fix, Olmix Group) mainly on physical soil properties but also on crop status. The experiment has been established in 2017; nevertheless, initial measurements of implement draft have been performed before the treated manure application. In 2018, the physical soil properties and crop status (sugar beet) has been determined and compared with the untreated manure and control variant. Significant results have been observed already in the first year, where the implement draft decreased by 9.2 % within the treated manure variant in comparison with the control variant. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=field%20experiment" title="field experiment">field experiment</a>, <a href="https://publications.waset.org/abstracts/search?q=implement%20draft" title=" implement draft"> implement draft</a>, <a href="https://publications.waset.org/abstracts/search?q=vegetation%20index" title=" vegetation index"> vegetation index</a>, <a href="https://publications.waset.org/abstracts/search?q=sugar%20beet" title=" sugar beet"> sugar beet</a> </p> <a href="https://publications.waset.org/abstracts/120126/changes-in-physical-soil-properties-and-crop-status-on-soil-enriched-with-treated-manure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/120126.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">156</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">12</span> Comparison of Efficient Production of Small Module Gears</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Musil">Vaclav Musil</a>, <a href="https://publications.waset.org/abstracts/search?q=Robert%20Cep"> Robert Cep</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarka%20Malotova"> Sarka Malotova</a>, <a href="https://publications.waset.org/abstracts/search?q=Jiri%20Hajnys"> Jiri Hajnys</a>, <a href="https://publications.waset.org/abstracts/search?q=Frantisek%20Spalek"> Frantisek Spalek</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The new designs of satellite gears comprising a number of small gears pose high requirements on the precise production of small module gears. The objective of the experimental activity stated in this article was to compare the conventional rolling gear cutting technology with the modern wire electrical discharge machining (WEDM) technology for the production of small module gear m=0.6 mm (thickness of 2.5 mm and material 30CrMoV9). The WEDM technology lies in copying the profile of gearing from the rendered trajectory which is then transferred to the track of a wire electrode. During the experiment, we focused on the comparison of these production methods. Main measured parameters which significantly influence the lifetime and noise was chosen. The first parameter was to compare the precision of gearing profile in respect to the mathematic model. The second monitored parameter was the roughness and surface topology of the gear tooth side. The experiment demonstrated high accuracy of WEDM technology, but a low quality of machined surface. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=precision%20of%20gearing" title="precision of gearing">precision of gearing</a>, <a href="https://publications.waset.org/abstracts/search?q=small%20module%20gears" title=" small module gears"> small module gears</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20topology" title=" surface topology"> surface topology</a>, <a href="https://publications.waset.org/abstracts/search?q=WEDM%20technology" title=" WEDM technology"> WEDM technology</a> </p> <a href="https://publications.waset.org/abstracts/82952/comparison-of-efficient-production-of-small-module-gears" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82952.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">232</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">11</span> “Double Layer” Theory of Hydrogenation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Heral">Vaclav Heral</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ideas about the mechanism of heterogeneous catalytic hydrogenation are diverse. The Horiuti-Polanyi mechanism is most often referred to, based on the idea of a semi-hydrogenated state. In our opinion, it does not represent a satisfactory explanation of the hydrogenation mechanism, because, for example: (1) It neglects the fact that the bond of atomic hydrogen to the metal surface is strongly polarized, (2) It does not explain why a surface deprived of atomic hydrogen (by thermal desorption or by alkyne) loses isomerization capabilities, but hydrogenation capabilities remain preserved, (3) It was observed that during the hydrogenation of 1-alkenes, the reaction can be of the 0th order to hydrogen and to the alkene at the same time, which is excluded during the competitive adsorption of both reactants on the catalyst surface. We offer an alternative mechanism that satisfactorily explains many of the ambiguities: It is the idea of an independent course of olefin isomerization, catalyzed by acidic atomic hydrogen bonded on the surface of the catalyst, in addition to the hydrogenation itself, in which a two-layer complex appears on the surface of the catalyst: olefin bound to the surface and molecular hydrogen bound to it in the second layer. The rate-determining step of hydrogenation is the conversion of this complex into the final product. We believe that the Horiuti-Polanyi mechanism is flawed and we naturally think that our two-layer theory better describes the experimental findings. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acidity%20of%20hydrogenation%20catalyst" title="acidity of hydrogenation catalyst">acidity of hydrogenation catalyst</a>, <a href="https://publications.waset.org/abstracts/search?q=Horiuti-Polanyi" title=" Horiuti-Polanyi"> Horiuti-Polanyi</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogenation" title=" hydrogenation"> hydrogenation</a>, <a href="https://publications.waset.org/abstracts/search?q=two-layer%20hydrogenation" title=" two-layer hydrogenation"> two-layer hydrogenation</a> </p> <a href="https://publications.waset.org/abstracts/173813/double-layer-theory-of-hydrogenation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/173813.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">72</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">10</span> Synthesis of Flower-Like Silver Nanoarchitectures in Special Shapes and Their Applications in Surface-Enhanced Raman Scattering</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Radka%20Kr%C3%A1lov%C3%A1">Radka Králová</a>, <a href="https://publications.waset.org/abstracts/search?q=Libor%20Kv%C3%ADtek"> Libor Kvítek</a>, <a href="https://publications.waset.org/abstracts/search?q=V%C3%A1clav%20Ranc"> Václav Ranc</a>, <a href="https://publications.waset.org/abstracts/search?q=Ale%C5%A1%20Pan%C3%A1%C4%8Dek"> Aleš Panáček</a>, <a href="https://publications.waset.org/abstracts/search?q=Radek%20Zbo%C5%99il"> Radek Zbořil</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Surface–Enhanced Raman Scattering (SERS) is an optical spectroscopic technique with very good potential for sensitive detection of substances. In this research, active substrates with high enhancement were provided. Novel silver particles (nanostructures) with high roughened, flower–like morphology were prepared by reduction of cation complex [Ag(NH3)2]+ in presence of sodium borohydride as reducing agent and stabilized polyacrylic acid. The products were characterized by UV/VIS absorption spectrophotometry. Special shapes of silver particles were determined by scanning electron microscopy (SEM) and transmission electron spectroscopy (TEM). Dispersions of this particle were put on fixed substrate to producing suitable layer for SERS. Adenine was applied as basic substance whose effect of enhancement on the layer of silver nanostructures was studied. By comparison with our work, the important influence of stabilizers, polyacrylic acid with various molecular weight and concentration, on the transfer of particles and formation of new structure was confirmed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=metals" title="metals">metals</a>, <a href="https://publications.waset.org/abstracts/search?q=nanostructures" title=" nanostructures"> nanostructures</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20reduction" title=" chemical reduction"> chemical reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=Raman%20spectroscopy" title=" Raman spectroscopy"> Raman spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20properties" title=" optical properties "> optical properties </a> </p> <a href="https://publications.waset.org/abstracts/11710/synthesis-of-flower-like-silver-nanoarchitectures-in-special-shapes-and-their-applications-in-surface-enhanced-raman-scattering" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11710.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">370</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">9</span> The Influence of Different Technologies on the Infiltration Properties and Soil Surface Crusting Processing in the North Bohemia Region</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Miroslav%20Dumbrovsky">Miroslav Dumbrovsky</a>, <a href="https://publications.waset.org/abstracts/search?q=Lucie%20Larisova"> Lucie Larisova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The infiltration characteristic of the soil surface is one of the major factors that determines the potential soil degradation risk. The physical, chemical and biological characteristic of soil is changed by the processing of soil. The infiltration soil ability has an important role in soil and water conservation. The subject of the contribution is the evaluation of the influence of the conventional tillage and reduced tillage technology on soil surface crusting processing and infiltration properties of the soil in the North Bohemia region. Field experimental work at the area was carried out in the years 2013-2016 on Cambisol district medium-heavy clayey soil. The research was conducted on sloping erosion-endangered blocks of compacted arable land. The areas were chosen each year in the way that one of the experimental areas was handled by conventional tillage technologies and the other by reduced tillage technologies. Intact soil samples were taken into Kopecký´s cylinders in the three landscape positions, at a depth of 10 cm (representing topsoil) and 30 cm (representing subsoil). The cumulative infiltration was measured using a mini-disc infiltrometer near the consumption points. The Zhang method (1997), which provides an estimate of the unsaturated hydraulic conductivity K(h), was used for the evaluation of the infiltration tests of the mini-disc infiltrometer. The soil profile processed by conventional tillage showed a higher degree of compaction and soil crusting processing. The bulk density was between 1.10–1.67 g.cm⁻³, compared to the land processed by the reduced tillage technology, where the values were between 0.80–1.29 g.cm⁻³. Unsaturated hydraulic conductivity values were about one-third higher within the reduced tillage technology soil processing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=soil%20crusting%20processing" title="soil crusting processing">soil crusting processing</a>, <a href="https://publications.waset.org/abstracts/search?q=unsaturated%20hydraulic%20conductivity" title=" unsaturated hydraulic conductivity"> unsaturated hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=cumulative%20infiltration" title=" cumulative infiltration"> cumulative infiltration</a>, <a href="https://publications.waset.org/abstracts/search?q=bulk%20density" title=" bulk density"> bulk density</a>, <a href="https://publications.waset.org/abstracts/search?q=porosity" title=" porosity"> porosity</a> </p> <a href="https://publications.waset.org/abstracts/75019/the-influence-of-different-technologies-on-the-infiltration-properties-and-soil-surface-crusting-processing-in-the-north-bohemia-region" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75019.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">247</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> Correlation of Material Mechanical Characteristics Obtained by Means of Standardized and Miniature Test Specimens</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Mentl">Vaclav Mentl</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Zlabek"> P. Zlabek</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Volak"> J. Volak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> New methods of mechanical testing were developed recently that are based on making use of miniature test specimens (e.g. Small Punch Test). The most important advantage of these method is the nearly non-destructive withdrawal of test material and small size of test specimen what is interesting in cases of remaining lifetime assessment when a sufficient volume of the representative material cannot be withdrawn of the component in question. In opposite, the most important disadvantage of such methods stems from the necessity to correlate test results with the results of standardised test procedures and to build up a database of material data in service. The correlations among the miniature test specimen data and the results of standardised tests are necessary. The paper describes the results of fatigue tests performed on miniature tests specimens in comparison with traditional fatigue tests for several steels applied in power producing industry. Special miniature test specimens fixtures were designed and manufactured for the purposes of fatigue testing at the Zwick/Roell 10HPF5100 testing machine. The miniature test specimens were produced of the traditional test specimens. Seven different steels were fatigue loaded (R = 0.1) at room temperature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title="mechanical properties">mechanical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=miniature%20test%20specimens" title=" miniature test specimens"> miniature test specimens</a>, <a href="https://publications.waset.org/abstracts/search?q=correlations" title=" correlations"> correlations</a>, <a href="https://publications.waset.org/abstracts/search?q=small%20punch%20test" title=" small punch test"> small punch test</a>, <a href="https://publications.waset.org/abstracts/search?q=micro-tensile%20test" title=" micro-tensile test"> micro-tensile test</a>, <a href="https://publications.waset.org/abstracts/search?q=mini-charpy%20impact%20test" title=" mini-charpy impact test"> mini-charpy impact test</a> </p> <a href="https://publications.waset.org/abstracts/29049/correlation-of-material-mechanical-characteristics-obtained-by-means-of-standardized-and-miniature-test-specimens" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29049.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">538</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7</span> Synthesis Modified Electrodes with Au/Pt Nanoparticles and Two New Coordination Polymers of Ag(I) and Cu(II) Constructed by Pyrazine and 3-Nitrophthalic Acid as a Novel Electrochemical Sensing Platform</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zohreh%20Derikvand">Zohreh Derikvand</a>, <a href="https://publications.waset.org/abstracts/search?q=Hadis%20Cheraghi"> Hadis Cheraghi</a>, <a href="https://publications.waset.org/abstracts/search?q=Azadeh%20%20Azadbakht"> Azadeh Azadbakht</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Eigner"> Vaclav Eigner</a>, <a href="https://publications.waset.org/abstracts/search?q=Michal%20Dusek"> Michal Dusek</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Two new one and two dimensional metal organic coordination polymers of Cu(II), [Cu(3-nph)2(H2O)2pz]n (1) and Ag(I), {[Ag(3-nph)pz].H2O}n (2) with pyrazine (pz) and 3- nitrophthalic acid (3-nph) have been synthesized and characterized by elemental analysis, spectral (IR, UV-Vis), thermal (TG/DTG) analysis and single crystal X-ray diffraction. We used these compounds to preparation modified electrode with Au/Pt nanosparticles in order to investigation electrochemistry and electrocatalysis activities. The surface structure and composition of the sensor were characterized by scanning electron microscopy (SEM). The Ag(I) coordination polymer shows a 2D layer structure constructed from dinuclear silver (I) building blocks in which two crystallographically Ag+ ions are connected to each other by a covalent bond. The pyrazine ligands adopt μ2 bridging modes, linking the metal centers into a one and two -dimensional coordination framework in 1 and 2. The two AgI cations are surrounded by pyrazine and 3-nitrophthalate mono anions and indicate distorted tetrahedral geometry. In the crystal structures of Ag(I) complex there are non-classical hydrogen bonding arrangements, C–O•••π and π–π stacking interactions. In Cu(II) coordination polymer, the coordination geometry around Cu(II) atom is a distorted octahedron. Interestingly, the structural analysis illustrates that the strong and weak hydrogen bond accompanied with C–H•••π and C–O•••π stacking interactions assemble the crystal structure of 1 and 2 into fascinating 3D supramolecular architecture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=3-nithrophethalic%20acid" title="3-nithrophethalic acid">3-nithrophethalic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=crystal%20structure" title=" crystal structure"> crystal structure</a>, <a href="https://publications.waset.org/abstracts/search?q=coordination%20polymer" title=" coordination polymer"> coordination polymer</a>, <a href="https://publications.waset.org/abstracts/search?q=electrocatalysis" title=" electrocatalysis"> electrocatalysis</a> </p> <a href="https://publications.waset.org/abstracts/34132/synthesis-modified-electrodes-with-aupt-nanoparticles-and-two-new-coordination-polymers-of-agi-and-cuii-constructed-by-pyrazine-and-3-nitrophthalic-acid-as-a-novel-electrochemical-sensing-platform" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34132.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">319</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> Determination of Prostate Specific Membrane Antigen (PSMA) Based on Combination of Nanocomposite Fe3O4@Ag@JB303 and Magnetically Assisted Surface Enhanced Raman Spectroscopy (MA-SERS)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zuzana%20Chaloupkov%C3%A1">Zuzana Chaloupková</a>, <a href="https://publications.waset.org/abstracts/search?q=Zde%C5%88ka%20Markov%C3%A1"> Zdeňka Marková</a>, <a href="https://publications.waset.org/abstracts/search?q=V%C3%A1clav%20Ranc"> Václav Ranc</a>, <a href="https://publications.waset.org/abstracts/search?q=Radek%20Zbo%C5%99il"> Radek Zbořil</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Prostate cancer is now one of the most serious oncological diseases in men with an incidence higher than that of all other solid tumors combined. Diagnosis of prostate cancer usually involves detection of related genes or detection of marker proteins, such as PSA. One of the new potential markers is PSMA (prostate specific membrane antigen). PSMA is a unique membrane bound glycoprotein, which is considerably overexpressed on prostate cancer as well as neovasculature of most of the solid tumors. Commonly applied methods for a detection of proteins include techniques based on immunochemical approaches, including ELISA and RIA. Magnetically assisted surface enhanced Raman spectroscopy (MA-SERS) can be considered as an interesting alternative to generally accepted approaches. This work describes a utilization of MA-SERS in a detection of PSMA in human blood. This analytical platform is based on magnetic nanocomposites Fe3O4@Ag, functionalized by a low-molecular selector labeled as JB303. The system allows isolating the marker from the complex sample using application of magnetic force. Detection of PSMA is than performed by SERS effect given by a presence of silver nanoparticles. This system allowed us to analyze PSMA in clinical samples with limits of detection lower than 1 ng/mL. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=diagnosis" title="diagnosis">diagnosis</a>, <a href="https://publications.waset.org/abstracts/search?q=cancer" title=" cancer"> cancer</a>, <a href="https://publications.waset.org/abstracts/search?q=PSMA" title=" PSMA"> PSMA</a>, <a href="https://publications.waset.org/abstracts/search?q=MA-SERS" title=" MA-SERS"> MA-SERS</a>, <a href="https://publications.waset.org/abstracts/search?q=Ag%20nanoparticles" title=" Ag nanoparticles"> Ag nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/41975/determination-of-prostate-specific-membrane-antigen-psma-based-on-combination-of-nanocomposite-fe3o4-at-ag-at-jb303-and-magnetically-assisted-surface-enhanced-raman-spectroscopy-ma-sers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41975.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">229</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Non-Invasive Techniques of Analysis of Painting in Forensic Fields</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Radka%20Sefcu">Radka Sefcu</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclava%20Antuskova"> Vaclava Antuskova</a>, <a href="https://publications.waset.org/abstracts/search?q=Ivana%20Turkova"> Ivana Turkova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A growing market with modern artworks of a high price leads to the creation and selling of artwork counterfeits. Material analysis is an important part of the process of assessment of authenticity. Knowledge of materials and techniques used by original authors is also necessary. The contribution presents possibilities of non-invasive methods of structural analysis in research on paintings. It was proved that unambiguous identification of many art materials is feasible without sampling. The combination of Raman spectroscopy with FTIR-external reflection enabled the identification of pigments and binders on selected artworks of prominent Czech painters from the first half of the 20th century – Josef Čapek, Emil Filla, Václav Špála and Jan Zrzavý. Raman spectroscopy confirmed the presence of a wide range of white pigments - lead white, zinc white, titanium white, barium white and also Freeman's white as a special white pigment of painting. Good results were obtained for red, blue and most of the yellow areas. Identification of green pigments was often impossible due to strong fluorescence. Oil was confirmed as a binding medium on most of the analyzed artworks via FTIR - external reflection. Collected data present the valuable background for the determination of art materials characteristic for each painter (his palette) and its development over time. Obtained results will further serve as comparative material for the authentication of artworks. This work has been financially supported by the project of the Ministry of the Interior of the Czech Republic: The Development of a Strategic Cluster for Effective Instrumental Technological Methods of Forensic Authentication of Modern Artworks (VJ01010004). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=non-invasive%20analysis" title="non-invasive analysis">non-invasive analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=Raman%20spectroscopy" title=" Raman spectroscopy"> Raman spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=FTIR-external%20reflection" title=" FTIR-external reflection"> FTIR-external reflection</a>, <a href="https://publications.waset.org/abstracts/search?q=forgeries" title=" forgeries"> forgeries</a> </p> <a href="https://publications.waset.org/abstracts/138712/non-invasive-techniques-of-analysis-of-painting-in-forensic-fields" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138712.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">172</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> People Vote with Their Feet: The 'Parallel Polis' in South Africa as a Reaction to the Neo-Patrimonial State</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Kok">A. Kok</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The South African experience of the general upsurge in protest movements internationally is characterised by a tension between a neo-patrimonial state on the one hand, and a society with growing middle-class needs and interests on the other. This tension translates into local community service delivery protests – often violent in nature – that have been steadily increasing in number since 2008, student uprisings that have reached their height in October 2015, and various continuing local social #MustFall movements that are geared towards addressing government corruption and transforming neo-liberal structures. As a result, growing citizen (and non-citizen) revolt in South Africa has seen the (i) creeping securitization of the neo-patrimonial state and (ii) the 'top-down' misuse of a current 'bottom-up' people’s ideology, decoloniality, in an attempt by a faction in the ruling party (representing the neo-patrimonial state) to legitimize its actions and consolidate its power. The neo-patrimonial state’s creeping securitization and ideological positioning lead to a further mistrust of public institutions, people’s disengagement with traditional politics, and the creation of a 'parallel polis' by citizens and non-citizens that bypasses the official and oftentimes corrupt structures of the state. By applying the concept 'parallel polis' – originally developed by Václav Benda in connection with the movement Charter 77 in former Czechoslovakia – to a South African case study, it is illustrated that, even in the absence of overt oppression and the use of terror by a ruling elite, entrenched neo-patrimonialism can be potent enough to fuel the creation of various independent parallel public spheres (or, as a whole, understood as a 'parallel polis') to bypass dysfunctional state channels. A flourishing parallel polis offers possibilities for political, social and economic renewal. This is especially relevant in the consolidation of South Africa’s relatively young democracy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=decoloniality" title="decoloniality">decoloniality</a>, <a href="https://publications.waset.org/abstracts/search?q=neo-patrimonialism" title=" neo-patrimonialism"> neo-patrimonialism</a>, <a href="https://publications.waset.org/abstracts/search?q=%27parallel%20polis%27" title=" 'parallel polis'"> 'parallel polis'</a>, <a href="https://publications.waset.org/abstracts/search?q=protest%20movements" title=" protest movements"> protest movements</a>, <a href="https://publications.waset.org/abstracts/search?q=South%20Africa" title=" South Africa"> South Africa</a>, <a href="https://publications.waset.org/abstracts/search?q=state%20securitization" title=" state securitization"> state securitization</a> </p> <a href="https://publications.waset.org/abstracts/74497/people-vote-with-their-feet-the-parallel-polis-in-south-africa-as-a-reaction-to-the-neo-patrimonial-state" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74497.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">221</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Bioreactor for Cell-Based Impedance Measuring with Diamond Coated Gold Interdigitated Electrodes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roman%20Matejka">Roman Matejka</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Prochazka"> Vaclav Prochazka</a>, <a href="https://publications.waset.org/abstracts/search?q=Tibor%20Izak"> Tibor Izak</a>, <a href="https://publications.waset.org/abstracts/search?q=Jana%20Stepanovska"> Jana Stepanovska</a>, <a href="https://publications.waset.org/abstracts/search?q=Martina%20Travnickova"> Martina Travnickova</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexander%20Kromka"> Alexander Kromka</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cell-based impedance spectroscopy is suitable method for electrical monitoring of cell activity especially on substrates that cannot be easily inspected by optical microscope (without fluorescent markers) like decellularized tissues, nano-fibrous scaffold etc. Special sensor for this measurement was developed. This sensor consists of corning glass substrate with gold interdigitated electrodes covered with diamond layer. This diamond layer provides biocompatible non-conductive surface for cells. Also, a special PPFC flow cultivation chamber was developed. This chamber is able to fix sensor in place. The spring contacts are connecting sensor pads with external measuring device. Construction allows real-time live cell imaging. Combining with perfusion system allows medium circulation and generating shear stress stimulation. Experimental evaluation consist of several setups, including pure sensor without any coating and also collagen and fibrin coating was done. The Adipose derived stem cells (ASC) and Human umbilical vein endothelial cells (HUVEC) were seeded onto sensor in cultivation chamber. Then the chamber was installed into microscope system for live-cell imaging. The impedance measurement was utilized by vector impedance analyzer. The measured range was from 10 Hz to 40 kHz. These impedance measurements were correlated with live-cell microscopic imaging and immunofluorescent staining. Data analysis of measured signals showed response to cell adhesion of substrates, their proliferation and also change after shear stress stimulation which are important parameters during cultivation. Further experiments plan to use decellularized tissue as scaffold fixed on sensor. This kind of impedance sensor can provide feedback about cell culture conditions on opaque surfaces and scaffolds that can be used in tissue engineering in development artificial prostheses. This work was supported by the Ministry of Health, grants No. 15-29153A and 15-33018A. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bio-impedance%20measuring" title="bio-impedance measuring">bio-impedance measuring</a>, <a href="https://publications.waset.org/abstracts/search?q=bioreactor" title=" bioreactor"> bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=cell%20cultivation" title=" cell cultivation"> cell cultivation</a>, <a href="https://publications.waset.org/abstracts/search?q=diamond%20layer" title=" diamond layer"> diamond layer</a>, <a href="https://publications.waset.org/abstracts/search?q=gold%20interdigitated%20electrodes" title=" gold interdigitated electrodes"> gold interdigitated electrodes</a>, <a href="https://publications.waset.org/abstracts/search?q=tissue%20engineering" title=" tissue engineering"> tissue engineering</a> </p> <a href="https://publications.waset.org/abstracts/57716/bioreactor-for-cell-based-impedance-measuring-with-diamond-coated-gold-interdigitated-electrodes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57716.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">301</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Spatiotemporal Changes in Drought Sensitivity Captured by Multiple Tree-Ring Parameters of Central European Conifers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kre%C5%A1imir%20Begovi%C4%87">Krešimir Begović</a>, <a href="https://publications.waset.org/abstracts/search?q=Milo%C5%A1%20Rydval"> Miloš Rydval</a>, <a href="https://publications.waset.org/abstracts/search?q=Jan%20Tumajer"> Jan Tumajer</a>, <a href="https://publications.waset.org/abstracts/search?q=Kristyna%20Svobodov%C3%A1"> Kristyna Svobodová</a>, <a href="https://publications.waset.org/abstracts/search?q=Thomas%20Langbehn"> Thomas Langbehn</a>, <a href="https://publications.waset.org/abstracts/search?q=Yumei%20Jiang"> Yumei Jiang</a>, <a href="https://publications.waset.org/abstracts/search?q=Vojtech%20%C4%8Cada"> Vojtech Čada</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Treml"> Vaclav Treml</a>, <a href="https://publications.waset.org/abstracts/search?q=Ryszard%20Kaczka"> Ryszard Kaczka</a>, <a href="https://publications.waset.org/abstracts/search?q=Miroslav%20Svoboda"> Miroslav Svoboda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Environmental changes have increased the frequency and intensity of climatic extremes, particularly hotter droughts, leading to altered tree growth patterns and multi-year lags in tree recovery. The effects of shifting climatic conditions on tree growth are inhomogeneous across species’ natural distribution ranges, with large spatial heterogeneity and inter-population variability, but generally have significant consequences for contemporary forest dynamics and future ecosystem functioning. Despite numerous studies on the impacts of regional drought effects, large uncertainties remain regarding the mechanistic basis of drought legacy effects on wood formation and the ability of individual species to cope with increasingly drier growing conditions and rising year-to-year climatic variability. To unravel the complexity of climate-growth interactions and assess species-specific responses to severe droughts, we combined forward modeling of tree growth (VS-lite model) with correlation analyses against climate (temperature, precipitation, and the SPEI-3 moisture index) and growth responses to extreme drought events from multiple tree-ring parameters (tree-width and blue intensity parameters). We used an extensive dataset with over 1000 tree-ring samples from 23 nature forest reserves across an altitudinal range in Czechia and Slovakia. Our results revealed substantial spatiotemporal variability in growth responses to summer season temperature and moisture availability across species and tree-ring parameters. However, a general trend of increasing spring moisture-growth sensitivity in recent decades was observed in the Scots pine mountain forests and lowland forests of both species. The VS-lite model effectively captured nonstationary climate-growth relationships and accurately estimated high-frequency growth variability, indicating a significant incidence of regional drought events and growth reductions. Notably, growth reductions during extreme drought years and discrete legacy effects identified in individual wood components were most pronounced in the lowland forests. Together with the observed growth declines in recent decades, these findings suggest an increasing vulnerability of Norway spruce and Scots pine in dry lowlands under intensifying climatic constraints. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dendroclimatology" title="dendroclimatology">dendroclimatology</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaganova%E2%80%93Shashkin%20lite" title=" Vaganova–Shashkin lite"> Vaganova–Shashkin lite</a>, <a href="https://publications.waset.org/abstracts/search?q=conifers" title=" conifers"> conifers</a>, <a href="https://publications.waset.org/abstracts/search?q=central%20Europe" title=" central Europe"> central Europe</a>, <a href="https://publications.waset.org/abstracts/search?q=drought" title=" drought"> drought</a>, <a href="https://publications.waset.org/abstracts/search?q=blue%20intensity" title=" blue intensity"> blue intensity</a> </p> <a href="https://publications.waset.org/abstracts/178826/spatiotemporal-changes-in-drought-sensitivity-captured-by-multiple-tree-ring-parameters-of-central-european-conifers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/178826.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">58</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Bio-Psycho-Social Consequences and Effects in Fall-Efficacy Scale in Seniors Using Exercise Intervention of Motor Learning According to Yoga Techniques</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Milada%20Krejci">Milada Krejci</a>, <a href="https://publications.waset.org/abstracts/search?q=Martin%20Hill"> Martin Hill</a>, <a href="https://publications.waset.org/abstracts/search?q=Vaclav%20Hosek"> Vaclav Hosek</a>, <a href="https://publications.waset.org/abstracts/search?q=Dobroslava%20Jandova"> Dobroslava Jandova</a>, <a href="https://publications.waset.org/abstracts/search?q=Jiri%20Kajzar"> Jiri Kajzar</a>, <a href="https://publications.waset.org/abstracts/search?q=Pavel%20Blaha"> Pavel Blaha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper declares effects of exercise intervention of the research project “Basic research of balance changes in seniors”, granted by the Czech Science Foundation. The objective of the presented study is to define predictors, which influence bio-psycho-social consequences and effects of balance ability in senior 65 years old and above. We focused on the Fall-Efficacy Scale changes evaluation in seniors. Comprehensive hypothesis of the project declares, that motion uncertainty (dyskinesia) can negatively affect the well-being of a senior in bio-psycho-social context. In total, random selection and testing of 100 seniors (30 males, 70 females) from Prague and Central Bohemian region was provided. The sample was divided by stratified random selection into experimental and control groups, who underwent input and output testing. For diagnostics the methods of Medical Anamnesis, Functional anthropological examinations, Tinetti Balance Assessment Tool, SF-36 Health Survey, Anamnestic comparative self-assessment scale were used. Intervention method called "Life in Balance" based on yoga techniques was applied in four-week cycle. Results of multivariate regression were verified by repeated measures ANOVA: subject factor, phase of intervention (between-subject factor), body fluid (within-subject factor) and phase of intervention × body fluid interaction). ANOVA was performed with a repetition involving the factors of subjects, experimental/control group, phase of intervention (independent variable), and x phase interaction followed by Bonferroni multiple comparison assays with a test strength of at least 0.8 on the probability level p < 0.05. In the paper results of the first-year investigation of the three years running project are analysed. Results of balance tests confirmed no significant difference between females and males in pre-test. Significant improvements in balance and walking ability were observed in experimental group in females comparing to males (F = 128.4, p < 0.001). In the females control group, there was no significant change in post- test, while in the female experimental group positive changes in posture and spine flexibility in post-tests were found. It seems that females even in senior age react better to incentives of intervention in balance and spine flexibility. On the base of results analyses, we can declare the significant improvement in social balance markers after intervention in the experimental group (F = 10.5, p < 0.001). In average, seniors are used to take four drugs daily. Number of drugs can contribute to allergy symptoms and balance problems. It can be concluded that static balance and walking ability of seniors according Tinetti Balance scale correlate significantly with psychic and social monitored markers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=exercises" title="exercises">exercises</a>, <a href="https://publications.waset.org/abstracts/search?q=balance" title=" balance"> balance</a>, <a href="https://publications.waset.org/abstracts/search?q=seniors%2065%2B" title=" seniors 65+"> seniors 65+</a>, <a href="https://publications.waset.org/abstracts/search?q=health" title=" health"> health</a>, <a href="https://publications.waset.org/abstracts/search?q=mental%20and%20social%20balance" title=" mental and social balance"> mental and social balance</a> </p> <a 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