Jiří Vojar, Jana Doležalová, Milič Solský, Daniela Smolová, Oldřich Kopecký, Tomáš Kadlec, Michal Knapp,
The ecological value and conservation potential of post-mining areas have been increasingly recognized by scientists and conservationists during recent decades. Especially valuable are sites left to spontaneous succession, which constitute habitats with high species diversity, or habitats that serve as refuges for threatened species. In contrast to several other taxa, there is a lack of such evidence for amphibians, despite the assumption that primary succession leads to a more suitable environment ...
Tópico(s): Amphibian and Reptile Biology
2016 - Elsevier BV | Ecological Engineering
Jakub Gemrot, Rudolf Kadlec, Michal Bída, Ondřej Burkert, Radek Píbil, Jan Havlı́ček, Lukáš Zemčák, Juraj Šimlovič, Radim Vansa, Michal Štolba, Tomáš Plch, Cyril Brom,
Many research projects oriented on control mechanisms of virtual agents in videogames have emerged in recent years. However, this boost has not been accompanied with the emergence of toolkits supporting development of these projects, slowing down the progress in the field. Here, we present Pogamut 3, an open source platform for rapid development of behaviour for virtual agents embodied in a 3D environment of the Unreal Tournament 2004 videogame. Pogamut 3 is designed to support research as well ...
Tópico(s): Evacuation and Crowd Dynamics
2009 - Springer Science+Business Media | Lecture notes in computer science
Jana Knappová, Dana Židlická, Tomáš Kadlec, Michal Knapp, D. Haisel, Věroslava Hadincová, Zuzana Münzbergová,
With ongoing climate change, it is likely that shifts in species distribution ranges will lead to changes in the type and intensity of plant–herbivore interactions. Plants currently exposed to lower levels of herbivory could have less developed defensive mechanisms and therefore could suffer in case of increased herbivore pressure. We performed a common garden experiment using clones of Festuca rubra originating from four populations experiencing contrasting temperature and precipitation regimes. ...
Tópico(s): Plant Parasitism and Resistance
2018 - Elsevier BV | Basic and Applied Ecology
Ezequiel González, Martin Štrobl, Petr Janšta, Tomáš Hovorka, Tomáš Kadlec, Michal Knapp,
Non-crop habitats are important to support biodiversity and ecosystem services in agricultural landscapes. Whereas perennial and managed non-crop habitats have known benefits, temporary non-crop patches within arable fields (field defects) have been poorly studied. We created artificial field defects (unsown patches) in oilseed rape (Brassica napus L.) fields and evaluated their effects on parasitoid assemblages at two crop growth stages. Moreover, we compared unmanaged patches with those sown with ...
Tópico(s): Plant Parasitism and Resistance
2021 - Elsevier BV | Biological Conservation
Jaroslav Hornak, Pavel Trnka, Petr Kadlec, Ondřej Michal, Václav Mentlík, Pavol Šutta, Gergely Márk Csányi, Zoltán Ádám Tamus,
Composite insulation materials are an inseparable part of numerous electrical devices because of synergy effect between their individual parts. One of the main aims of the presented study is an introduction of the dielectric properties of nanoscale magnesium oxide powder via Broadband Dielectric Spectroscopy (BDS). These unique results present the behavior of relative permittivity and loss factor in frequency and temperature range. Following the current trends in the application of inorganic nanofillers, ...
Tópico(s): Magnesium Oxide Properties and Applications
2018 - Multidisciplinary Digital Publishing Institute | Nanomaterials
Cyril Brom, Jakub Gemrot, Ondřej Burkert, Rudolf Kadlec, Michal Bída,
Many projects featuring intelligent virtual agents have emerged in last years, but not many reports on their advances in education. This paper presents the curricula of a university course on Modelling Behaviour of Human and Animal-like Agents, including a seminar in which students develop their own virtual agents using a toolkit we have developed. This course has been also scaled for a workshop with computer science high-school students. An evaluation of the course is presented and main lessons ...
Tópico(s): Human Motion and Animation
2006 - Springer Science+Business Media | Lecture notes in computer science
Miroslav Seidl, Ezequiel González, Tomáš Kadlec, Pavel Saska, Michal Knapp,
Landscape heterogeneity and higher complexity generally increase biodiversity in agroecosystems. Carabid beetles represent abundant and important predators of pests and weed seeds in temperate agroecosystems and are affected by landscape structure. Several studies have described the impact of permanent non-crop habitats such as woodlots, hedgerows, and grassy margins on carabid assemblages. However, temporal non-crop habitat islands within arable fields have been rarely investigated. The aim of ...
Tópico(s): Insect-Plant Interactions and Control
2020 - Elsevier BV | Agriculture Ecosystems & Environment
Ezequiel González, Miroslav Seidl, Tomáš Kadlec, Marco Ferrante, Michal Knapp,
Frequent extreme weather events, which jeopardize agriculture by affecting crop health, characterize the ongoing climate change. Temporary patches where sown plants are poorly developed (hereafter “field defects”) are likely to increase with climate change and can be colonized by other plant species. Although perennial non-crop habitats can act as refuges for beneficial insects in agricultural landscapes and increase ecosystem services (ESs) in neighbouring arable fields, the relevance of field defects ...
Tópico(s): Forest Insect Ecology and Management
2020 - Elsevier BV | Agriculture Ecosystems & Environment
Ondřej Burkert, Rudolf Kadlec, Jakub Gemrot, Michal Bída, Jan Havlı́ček, Martin Dörfler, Cyril Brom,
We present the platform for IVAs development in the human like environment of the first-person shooter game Unreal Tournament 2004. This environment is extendible and supported by vast community of users. Based on our previous experience the problem of fast verification of models of artificial intelligence or IVAs is in implementation issues. The developer spends most of his time solving technical environment dependent issues and malfunctions, which drives him away from his goals. Therefore our ...
Tópico(s): Tactile and Sensory Interactions
2007 - Springer Science+Business Media | Lecture notes in computer science
Tomáš Kovařík, David Rieger, J. Kadlec, Tomáš Křenek, Lucie Kullová, Michal Pola, Petr Bělský, Petr Franče, Jan Řı́ha,
Geopolymer composite has been synthesized at room temperature by mixing metakaolin, potassium silica solution and ceramic grog based on sintered schistous clay. Ceramic aggregate has been added in an amount from 250 to 325% of metakaolin weight. In this study, standard sieve analysis, particle size analyzer and electron microscopy were applied for a detailed investigation of the ceramic filler. The effect of aggregate gradation according to Fuller's model on mechanical strength and thermomechanical ...
Tópico(s): Recycled Aggregate Concrete Performance
2017 - Elsevier BV | Construction and Building Materials
David Rieger, J. Kadlec, Michal Pola, Tomáš Kovařík, P Franče,
This experimental research focuses on mechanical properties of non-woven glass fabric composites bound by geopolymeric matrix. This study investigates the effect of different matrix composition and amount of granular filler on the mechanical properties of final composites. Matrix was selected as a metakaolin based geopolymer hardened by different amount of potassium silicate activator. The ceramic granular filler was added into the matrix for investigation of its impact on mechanical properties ...
Tópico(s): Structural Behavior of Reinforced Concrete
2017 - IOP Publishing | IOP Conference Series Materials Science and Engineering
Martin Štrobl, Pavel Saska, Miroslav Seidl, Matúš Kocian, Karel Tajovský, Milan Řezáč, Jiří Skuhrovec, Pavel Marhoul, Bořivoj Zbuzek, Pavel Jakubec, Michal Knapp, Tomáš Kadlec,
Abstract Aim Landscape simplification and the spread of invasive species are considered beyond the main threats to global biodiversity. It is well recognized that non‐crop habitats bring complexity to farmland and provide refuge for a wide range of organisms, including arthropods. However, knowledge about the effects of invasive trees on arthropods in non‐crop habitats in intensive agricultural landscapes is still weak. Therefore, we examined differences in the arthropod assemblages between woodlots ...
Tópico(s): Fire effects on ecosystems
2019 - Wiley | Diversity and Distributions
Produção Nacional
Revisado por pares
Gustavo Q. Romero, Thiago Gonçalves‐Souza, Tomas Roslin, Robert J. Marquis, Nicholas A. C. Marino, Vojtěch Novotný, Tatiana Cornelissen, Jérôme Orivel, Shen Sui, Gustavo Aires, Reuber Antoniazzi, Wesley Dáttilo, Crasso Paulo Bosco Breviglieri, Annika Busse, Heloise Gibb, Thiago J. Izzo, Tomáš Kadlec, Victoria Kemp, Mônica F. Kersch‐Becker, Michal Knapp, Pavel Kratina, Rebecca Luke, Stefan Majnarić, Robin Maritz, Paulo Mateus Martins, Esayas Mendesil, Jaroslav Michalko, Anna Mrázová, Samuel Novais, Cássio Cardoso Pereira, Mirela Sertić Perić, Jana S. Petermann, Sérvio Pontes Ribeiro, Kateřina Sam, M. Kurtis Trzcinski, Camila Vieira, N. J. Westwood, María Laura Bernaschini, Valentina Carvajal, Ezequiel González, Mariana Jausoro, Stanis Kaensin, Fabiola Ospina, E. Jacob Cristóbal‐Pérez, Maurício Quesada, Pierre Rogy, Diane S. Srivastava, Scarlett Szpryngiel, Ayco J. M. Tack, Tiit Teder, Martín Videla, Mari‐Liis Viljur, Julia Koricheva,
Current climate change is disrupting biotic interactions and eroding biodiversity worldwide. However, species sensitive to aridity, high temperatures, and climate variability might find shelter in microclimatic refuges, such as leaf rolls built by arthropods. To explore how the importance of leaf shelters for terrestrial arthropods changes with latitude, elevation, and climate, we conducted a distributed experiment comparing arthropods in leaf rolls versus control leaves across 52 sites along an ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2022 - Wiley | Global Change Biology
Rudolf Kadlec, Michal Čermák, Zdeněk Behan, Cyril Brom,
Episodic memory modeling enjoys increasing interest in virtual agents, autonomous companions or computer games research communities. To evaluate memory models, it is often necessary to ”fill” them with appropriate data - streams of activities corresponding to what would happen to a real human during a particular time period. However, such activity corpora, freely available, are, to our best knowledge, lacking. This paper has two goals. First, it shows two already implemented complementary approaches ...
Tópico(s): Reinforcement Learning in Robotics
2013 - Springer Science+Business Media | Lecture notes in computer science
Rudolf Kadlec, Jakub Gemrot, Michal Bída, Ondřej Burkert, Jan Havlı́ček, Lukáš Zemčák, Radek Píbil, Radim Vansa, Cyril Brom,
IntroductionWe present recent extensions for the intelligent virtual agent development platform Pogamut 3. These extensions are: the agent coordination language StorySpeak designed for the purposes of storytelling applications, support for gestures based on BML, the visual editor of reactive plans, connection of the cognitive architecture ACT-R, an educational application aimed at orientation in urban areas and finally an emotional model.
Tópico(s): Semantic Web and Ontologies
2009 - Springer Science+Business Media | Lecture notes in computer science
Michal Knapp, Michal Řeřicha, Sarah Maršíková, Filip Harabiš, Tomáš Kadlec, Oldřich Nedvěd, Tiit Teder,
Tópico(s): Forest Insect Ecology and Management
2019 - Springer Science+Business Media | Biological Invasions
Jaroslav Kadlec, Ivo Světlík, Michal Rybníček, Tomáš Kolář, Filip Stehlík, Eduard Petrovský, Hana Grison,
The Morava River catchment in the Czech Republic serves as sedimentary archive reflecting various natural and man-made processes, and was studied by several authors from the point of view of flood frequency, anthropogenic contamination, or alluvial history. However, more consistent and detailed information on the effect of human activities, namely in terms of land use and river regulation, is missing. The aim of this study is to reconstruct the palaeoenvironmental and anthropogenic processes affecting ...
Tópico(s): Archaeology and ancient environmental studies
2022 - Elsevier BV | Palaeogeography Palaeoclimatology Palaeoecology
Radek Polanský, Josef Pihera, Josef Komárek, R. Pavlica, Pavel Prosr, Jaroslav Freisleben, Robert Vik, Karel Hromadka, Tomáš Blecha, Jiří Čengery, Radek Soukup, Michal Cermak, Monika Zemanová, Petr Kadlec, Aleš Hamáček,
A unique portable measuring system using an impedance spectroscopy method with a self-adapting frequency of measurement is introduced. The system is intended for the on-line in situ monitoring of composite materials curing under industrial conditions. The capabilities of the developed system are demonstrated through the results obtained from on-line in situ measurements of unreinforced thermosetting resin, as well as of composites under real manufacturing conditions. Observations are supported by ...
Tópico(s): Polymer Nanocomposites and Properties
2016 - Elsevier BV | Composites Part A Applied Science and Manufacturing
Cyril Brom, Michal Bída, Jakub Gemrot, Rudolf Kadlec, Tomáš Plch,
We report on the progress we have achieved in development of Emohawk, a 3D virtual reality application with an emergent narrative for teaching high-school students and undergraduates the basics of virtual characters control, emotion modelling, and narrative generation. Besides, we present a new methodology, used in Emohawk, for purposeful authoring of emergent narratives of Façade's complexity. The methodology is based on massive automatic search for stories that are appealing to the audience whilst ...
Tópico(s): Educational Games and Gamification
2009 - Springer Science+Business Media | Lecture notes in computer science
Jaroslav Hornak, Pavel Prosr, Pavel Trnka, Petr Kadlec, Ondřej Michal, Štefan Hardoň,
Potting compounds are an integral part of a large number of electrical devices, in which play the role of mainly mechanical or photosensitive protection. So-called cold-curing resins are one of the subgroups of potting mixtures. This article focuses on this type of potting compound based on epoxy (EPs) and polyurethane (PUs). In addition to the study of their electrical properties, structural properties are also introduced. The main focus of research is on the incorporation of nanometric magnesium ...
Tópico(s): Dielectric materials and actuators
2021 - American Institute of Physics | AIP conference proceedings
M. Jelı́nek, T. Kocourek, J. Zemek, Michal Novotný, J. Kadlec,
Tópico(s): Copper Interconnects and Reliability
2008 - Springer Science+Business Media | Applied Physics A
Jeňýk Hofmeister, Jan Hošek, Marek Brabec, Martin Hermy, Daniel Dvořák, Rostislav Fellner, Jiří Malíček, Zdeněk Palice, Aleš Tenčík, Eva Holá, Eva Novozámská, Tomáš Kuras, Filip Trnka, Michal Zedek, Josef Kašák, Radim Gabriš, Ondřej Sedláček, Karel Tajovský, Tomáš Kadlec,
Effective indicators for biodiversity hotspots and refuges of threatened forest species could help with efforts to mitigate the decline of European forest’s biodiversity. ʻAncient forest species’ (AFS, i.e. a group of forest vascular plant species that rely on forest continuity) were previously noted as possible indicators of biodiversity hotspots. However, different aspects of the forest continuity may be important for different taxa. Using data from two multi-taxa surveys of central European forests, ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2019 - Elsevier BV | Ecological Indicators
J. Kadlec, David Rieger, Tomáš Kovařík, Pavel Novotný, P Franče, Michal Pola,
In this study the effect of metakaolin replacement by milled blast furnace slag in alkali-activated geopolymeric binder was investigated in accordance to their rheological and mechanical properties. It was demonstrated that slag addition into the metakaolin binder can improve mechanical properties of final products. Our investigation was focused on broad interval of metakaolin substitution in the range from 100 to 40 volume per cents of metakaolin so that the volume content of solids in final binder ...
Tópico(s): Innovative concrete reinforcement materials
2017 - IOP Publishing | IOP Conference Series Materials Science and Engineering
Produção Nacional
Revisado por pares
Cássio Cardoso Pereira, Samuel Novais, Milton Barbosa, Daniel Negreiros, Thiago Gonçalves‐Souza, Tomas Roslin, Robert J. Marquis, Nicholas A. C. Marino, Vojtěch Novotný, Jérôme Orivel, Shen Sui, Gustavo Aires, Reuber Antoniazzi, Wesley Dáttilo, Crasso Paulo Bosco Breviglieri, Annika Busse, Heloise Gibb, Thiago J. Izzo, Tomáš Kadlec, Victoria Kemp, Mônica F. Kersch‐Becker, Michal Knapp, Pavel Kratina, Rebecca Luke, Stefan Majnarić, Robin Maritz, Paulo Mateus Martins, Esayas Mendesil, Jaroslav Michalko, Anna Mrázová, Mirela Sertić Perić, Jana S. Petermann, Sérvio Pontes Ribeiro, Kateřina Sam, M. Kurtis Trzcinski, Camila Vieira, N. J. Westwood, María Laura Bernaschini, Valentina Carvajal, Ezequiel González, Mariana Jausoro, Stanis Kaensin, Fabiola Ospina, E. Jacob Cristóbal‐Pérez, Maurício Quesada, Pierre Rogy, Diane S. Srivastava, Scarlett Szpryngiel, Ayco J. M. Tack, Tiit Teder, Martín Videla, Mari‐Liis Viljur, Julia Koricheva, Geraldo Wilson Fernandes, Gustavo Q. Romero, Tatiana Cornelissen,
The construction of shelters on plants by arthropods might influence other organisms via changes in colonization, community richness, species composition, and functionality. Arthropods, including beetles, caterpillars, sawflies, spiders, and wasps often interact with host plants via the construction of shelters, building a variety of structures such as leaf ties, tents, rolls, and bags; leaf and stem galls, and hollowed out stems. Such constructs might have both an adaptive value in terms of protection ( ...
Tópico(s): Ecosystem dynamics and resilience
2022 - Wiley | Ecology
Tomáš Kovařík, Tomáš Křenek, David Rieger, Michal Pola, Jan Řı́ha, Miloš Svoboda, Jan Beneš, Pavol Šutta, Petr Bělský, J. Kadlec,
This paper describes a facile and effective method for fabrication of open-cell ceramic foam derived from geopolymer precursor through replica technique. The polyurethane sponge method was applied using geopolymer mixture based on powder mixture of metakaolin/precipitated silica, potassium silica solution and fine chamotte filler. Accelerated solidification step at 60 °C for 30 min was performed to obtain dense structure with a good adhesion to the polymeric sponge. The effect of thermal treatment ...
Tópico(s): Advanced ceramic materials synthesis
2017 - Elsevier BV | Materials Letters
Michal Knapp, Martin Štrobl, Alfredo Venturo, Miroslav Seidl, Lada Jakubíková, Karel Tajovský, Tomáš Kadlec, Ezequiel González,
Non-crop habitats are supposed to provide valuable resources to beneficial arthropods inhabiting agricultural landscapes during both the growing and winter seasons. Unfortunately, studies focused on the performance of non-crop habitats during the winter period are much less abundant, despite their importance for efficient biodiversity conservation measures. In this study, we assessed the distribution of ground-dwelling arthropods overwintering on arable land as well as the boundaries and interiors ...
Tópico(s): Insect and Arachnid Ecology and Behavior
2022 - Elsevier BV | Biological Conservation
Tomáš Kovařík, J. Kadlec, Michal Pola, Pavel Novotný, Stanislava Podmanická, Marcela Čekalová, Lucie Kullová, David Rieger,
The aim of this paper is detailed description of synthesis geocement composite material based on K 2 O-Al 2 O 3 -SiO 2 system and characterization its thermal properties. The series of analytic tools were used (XRF, XRD, SEM, BET, particle-size distribution) for accurate identification of chemical and physical properties of raw material. Optimum technological prescription was determined and geocement specimens were tested for identification of mechanical and thermal properties. Three series of specimens ...
Tópico(s): Grouting, Rheology, and Soil Mechanics
2013 - Trans Tech Publications | Applied Mechanics and Materials
Jaroslav Kadlec, Michal Skocdopole, Vladimı́r Kolařı́k,
Tópico(s): Sensor Technology and Measurement Systems
2004 - Elsevier BV | IFAC Proceedings Volumes
Michal Cermak, Petr Kadlec, Pavol Šutta, Radek Polanský,
The paper briefly describes structural and mechanical influences of Halloysite nanotubes (HNT) in different level of fulfilment (0, 1, 3, 7 wt%) in the LLDPE commonly used in the cable industry. The influence of HNT on the polymer has been observed and evaluated through the average crystallite size and the micro- deformation by X-Ray diffractometry and the imaging of SEM. Despite the certain inter-phase tension between the polymer and HNT, the influence on the mechanical and combustion behaviour was ...
Tópico(s): Layered Double Hydroxides Synthesis and Applications
2016 - American Institute of Physics | AIP conference proceedings
Michal Cermak, Petr Kadlec, Zdenêk Kruliš, Radek Polanský,
The aim of this paper is to investigate the influence of HNT on the dielectric properties of LLDPE (linear low density polyethylene) nanocomposite compounds in the different level of fulfillment (0, 1, 3, 7 wt%). The utilization of these HNT/LLDPE nanocomposite compounds can be seen in the cable industry, where the dielectric properties are essential. Used experimental compounds have been prepared in the laboratory blades mixer Brabender W50 EHT and the plasticorder Brabender PLE 651. Immediately ...
Tópico(s): Iron oxide chemistry and applications
2016 - American Institute of Physics | AIP conference proceedings