National Repository of Grey Literature 191 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Habitat selection by dragonflies - effect of littoral and riparian vegetation
Bonková, Anita ; Černý, Martin (advisor) ; Waldhauser, Martin (referee)
Dragonflies form one of the important pillars of most aquatic ecosystems and play an important role in maintaining their balance. The main goal of this bachelor's thesis is to summarize current knowledge about the habitat preferences of members of the order Odonata, with a focus on the effect of littoral and riparian vegetation, which are critical components of aquatic biotopes and significantly influence the distribution, abundance and reproductive success of dragonflies. In my work, I focus on all developmental stages, from larvae to adults. These findings are important for the maintenance and revitalization of freshwater ecosystems, in which it is necessary to pay attention to the composition of littoral and riparian vegetation to support the diverse needs of this unique insect order. Key words: habitat preference, dragonflies, Odonata, riparian vegetation, littoral vegetation
Long-distance migrations of hover flies (Diptera: Syrphidae)
Hlaváček, Antonín ; Hadrava, Jiří (advisor) ; Černý, Martin (referee)
Long-distance migration of insects is well-known phenomenon, studied especially in butterflies and locusts. Until now, the migration of hover flies (Diptera: Syrphidae) was considered a rather marginal issue and not much attention has been given to it. However, billions of hoverflies take part in the spring and autumn migration every year, transferring hundreds of tonnes of biomass and nutrients. The aim of this thesis is to review an existing knowledge on the migration of hoverflies in context of their ecology and evolution. In the first part, I discuss the biogeography and diversity of migratory hover flies, methods for studying migration and the application of such methods in hover flies migration. In the following chapters, I focus on the migration of particular species in context of their ecology and evolution, especially on population dynamics, phenology, orientation, and dimorphism in the migratory generation.
Graphlets in Complex Networks
Trlifaj, Daniel ; Hartman, David (advisor) ; Černý, Martin (referee)
Analyzing the characteristics of complex networks is a principal task of network sci- ence. In this thesis, we study graphets, small induces subgraphs rooted in a vertex, as a tool to describe and compare networks. First, we use graph theory to explore the theo- retical properties of graphlets, propose a framework for studying them, and make novel observations. We discuss the link between graphlets and the Weisfeiler-Lehman isomor- phism test and the reconstruction conjecture. We prove that the knowledge of graphlets of size n − 1 for certain graphs is sufficient for their reconstruction. Second, we develop several graphlet-based metrics and apply them to real-world networks and their models. In line with prior literature, the results suggest that graphlets are potentially an excellent tool of characterizing networks. Counter to prior literature, the results suggest that the Albert-Barabási model produces more realistic synthetic networks than other models. 1
Crypsis at dragonflies
Záhorová, Kristýna ; Černý, Martin (advisor) ; Hadrava, Jiří (referee)
Crypsis is one of the defens mechanisms used by animals to hide from predators. It is a form of coloring that allows prey to blend in with their surroundings or makes difficult for predators to see them due to disruptive coloration. Dragonflies utilize crypsis across different families and sometimes even within individual species in various types of environments, ranging from savannas to tropical rainforests. Crypsis also serves as a defense mechanism not only against predators, but also against members of their own species, where females avoid sexual harassment from males and young males avoid fighting with adult males. This is related to changes in coloration during ontogenetic development, as well as the sometimes pronounced sexual dimorphism that is relatively common in dragonflies. Additionally, larvae of dragonflies are often cryptically colored. This study focuses on cryptically colored dragonflies from around the world and in various types of environments. Rather unexpectedly there are not many studies focing on this phenomena at otherwise throroughly studied group of insects. Key words: dragonflies, crypsis, cryptic coloration, sexual dimorphism, dragonflies larvae
Comparison of Accounting and Tax aspects of Employee Benefits in Selected Public Entities
Šuralová, Adriana ; Černý, Martin (referee) ; Křížová, Zuzana (advisor)
The bachelor thesis deals with the comparison of employee benefits. The theoretical part deals with the meaning of personnel work and provision of benefits according to accounting and tax aspects according to Czech legislation. The analytical part includes the provision of benefits in selected public sector entities in the South Moravian Region. In the design part of the thesis, proposals for changes that would lead to cost optimization are made.
P Wave Detection in Pathological ECG Signals
Šaclová, Lucie ; Černý, Martin (referee) ; Tkacz, Ewaryst (referee) ; Vítek, Martin (advisor)
Důležitou součástí hodnocení elektrokardiogramu (EKG) a následné detekce srdečních patologií, zejména v dlouhodobém monitorování, je detekce vln P. Výsledky detekce vln P umožňují získat ze záznamu EKG více informací o srdeční činnosti. Podle správně detekovaných pozic vln P je možné detekovat a odlišit patologie, které současné programy používané v medicínské praxi identifikovat neumožňují (např. atrioventrikulární blok 1., 2. a 3. stupně, cestující pacemaker, Wolffův-Parkinsonův-Whiteův syndrom). Tato dizertační práce představuje novou metodu detekce vln P v záznamech EKG během fyziologické a zejména patologické srdeční činnosti. Metoda je založena na fázorové transformaci, inovativních pravidlech detekce a identifikaci možných patologií zpřesňující detekci vln P. Dalším důležitým výsledkem práce je vytvoření dvou veřejně dostupných databází záznamů EKG s obsahem patologií a anotovanými vlnami P. Dizertační práce je rozdělena na teoretickou část a soubor publikací představující příspěvek autora v oblasti detekce vlny P.
Guest house in Lipnice nad Sázavou
Černý, Martin ; Kučera, Radim (referee) ; Bantová, Sylva (advisor)
The subject of my master´s thesis is project of Guesthouse in Lipnice nad Sázavou. It consists three parts: documentation for building permission, technical equipment and facility management. The building is L-shaped and it is designed as a two-storey building with partial basement. In basement is a technical facilities, engine rooms and storage rooms. On the ground floor there is an entrance to the building with reception. There is also fitness and restaurant for guests. The first floor is part for guests, there are twelve rooms, two playrooms, common room and cleaning room. The individual floors are accessible by stairs or lift. The building is set in a slightly sloping terrain. There are three entrances, for guests, employees and separate entrance to restaurant. Another entrance is to the bike shed. The foundation structures are made of plain concrete foundation strips. The main construction system is brick and the load-bearing structures and some non-bearing structures are from fired clay blocks. Other non-bearing structures are made of plasterboard. The horizontal load-bearing floor structure consists of a reinforced concrete slab. The construction of the gable roof is made of hammered wooden trusses. The land around the building is used for guests' leisure time. It is possible to spend time on the outdoor terrace of the restaurant, playground and outdoor pool. There are also paved sidewalks and parking for guests and employees. It is also planned for the disabled. The main part of project was done using ArchiCAD software.
Kvalita primární půdní organické hmoty v půdách porostů energetických trav
ČERNÝ, Martin
One of the main factors determining soil quality is soil organic matter. Its quality and content affect the soil properties and the surrounding environment. It is a source of many elements and nutrients important for soil organisms and plants. Therefore, from the point of view of agriculture, quality arable lands must have high soil organic mat-ter content. Methods for determining soil organic matter are still being developed and refined. This thesis uses one of the newer methods to evaluate the quality of primary soil organic matter by determining the rate constant for oxidation in soils of energy grasses Festuca arundinacea and Phleum pratense L. grown on experimental plots of the Faculty of agriculture and technology of University of South Bohemia. Samples from these soils were evaluated for primary soil organic matter and other properties, for example, quality of labile organic fractions, humus content, degree of humifica-tion etc. The results were evaluated after performing partial analyses. It was found that the quality and quantity of soil organic matter change during the season and have variances according to the monitored grass species. During the summer, the primary soil organic matter reached a higher quality. The share of primary soil organic matter in the soil during the individual months also differed, especially in March 2021 and March 2022. The newly formed matter accumulated due to minimal mineralization during the colder climate. The content of stable organic fractions is supported by agrotechnical operations such as fertilization. The highest average results of the con-tent of stable organic fractions were found in the surface layers at depth of 0-10 cm in the fertilized variant of vegetation. The average content of stable organic fractions in this depth was 1,23% for Phleum pratense L. And the average content of stable organic fractions at depth of 0-10 cm was 1,18% for Festuca arundinacea Schreb.
Kvalifikace primární půdní organické hmoty podle rychlostní konstanty oxidace v půdách energetických rostlin
ČERNÝ, Martin
An important thing that is influencing quality of yields or biomass for agricultural pruposes and sources for biogas plants is important quality of soil organic matter. It has a major impact on individual attributes of soil organic matter and environment. Over the years have been made many methods which are still upgrading. This bachelor thesis use one of the new method for rating quality of primary soil organic matter by constant of oxidation in soils of energetic grasses Festuca Arundinacea and Phleum pratense. These grasses were grown on experimental fields of the Faculty of Agriculture of the University of South Bohemia in České Budějovice. It has been rating attributes of soil samples from individual grasses such as humus content, degree of humification process and content total organic carbon in the soil. It was confirmed that soil ecosystem is subject to dynamic succession during the year. For this succession helps primary soil organic matter. The quality of soil organic matter depending on the type of grass and also style of how every grass is cultivated during the year. Fertilized parts achieved better results. For example in the final measurements was found to increase the quantity and quality of primary soil organic matter for both species of grasses or an increased content of soil organic carbon.
Cooperative games with partial information
Černý, Martin ; Bok, Jan (advisor)
(english) May 21, 2021 Partially defined cooperative games are a generalisation of classical coopera- tive games in which the worth of some of the coalitions is not known. Therefore, they are one of the possible approaches to uncertainty in cooperative game the- ory. The main focus of this thesis is to collect and extend the existing results in this theory. We present results on superadditivity, convexity, positivity and 1-convexity of incomplete games. For all the aforementioned properties, a de- scription of the set of all possible extensions (complete games extending the incomplete game) is studied. Different subclasses of incomplete games are con- sidered, among others incomplete games with minimal information, incomplete games with defined upper vector or symmetric incomplete games. Some of the results also apply to fully generalised games. For superadditivity and 1-convexity, solution concepts (considering only par- tial information) are introduced and studied. Especially for 1-convexity, a thor- ough investigation of the defined solution concepts consisting of different char- acterisations is provided. 1

National Repository of Grey Literature : 191 records found   1 - 10nextend  jump to record:
See also: similar author names
89 ČERNÝ, Martin
29 ČERNÝ, Michal
17 ČERNÝ, Miroslav
2 Černý, M.
10 Černý, Marcel
9 Černý, Marek
2 Černý, Marian
10 Černý, Matej
3 Černý, Matouš
10 Černý, Matěj
4 Černý, Michael
29 Černý, Michal
1 Černý, Mikuláš
2 Černý, Milan
3 Černý, Miloslav
3 Černý, Miloš
17 Černý, Miroslav
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