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The study of sulphonated polystyrene nanofabrics with encapsulated sensitizer
Hrdinková, Veronika ; Mosinger, Jiří (advisor) ; Vojtíšek, Pavel (referee)
The diploma thesis is dedicated to the exploitation of sulphonated polystyrene nanofibres as ion exchange nanomaterial. Ion exchange capacity of these nanomaterials has been determined by titration method and AAS. The effect of sulphonation on photophysical, photooxidative and photocytotoxic properties of sensitizer 5,10,15,20-meso- tetraphenylporphyrin (TPP) encapsulated in polystyrene nanofibres has been studied as well. Properties of TPP have been examined with time-resolved spectroscopy, photooxidation of uric acid as substrate and bactericidal tests on Escherichia coli DH5α with pGEM11Z plasmid. It has been discovered that following the sulphonation of the nanofabrics, the encapsulated sensitizer is partly present even in aggregation form. The polystyrene nanofabrics with encapsulated sensitizer keep its bactericidal efficiency also after sulphonation.
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Security inspection of network traffic
Kult, Viktor ; Havránek, Martin (advisor) ; Ladislav, Ladislav (referee)
Thesis topic concerns the issue of information security in corporate environments. Literature search includes information obtained by studying articles and literature in the field of information security. Resources were selected with a focus on the security risks, security technologies and legislative regulation. Attention is focused on technology that supports monitoring of communication flows in the data network. Overview of traffic operating a data network provides important information for the prevention or investigation of security incidents. Monitoring also serves as a source of information for the planning of the network infrastructure. It can detect faults or insufficient transmission capacity. The practical part is dedicated to implementation of the monitoring system in the real corporate networks. Part of the experience is the analysis of the network structure and choice of appropriate tools for actual implementation. When selecting tools, you can use the scoring method of multicriterial analysis options. The integration of the monitoring system is also the configuration of active network elements. Subsequent analysis of network traffic provides information about the most active users, most used applications or on the sources and targets of data transmitted. It provides a source of valuable information that can be used in case of failure on the network or security incident. The conclusion is a summary of the results and workflow.
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Thermoproperties of foundry moulds in dependence on different used foundry sands
Šuráň, Jiří ; Rusín, Karel (referee) ; Cupák, Petr (advisor)
The project elaborated in frame of engineering studies is submitting the study of thermal properties of holding mixtures using different types of sand. Were tested a total of 5 sands: zirkon, ŠH22, chromite, olivine and dunite. Molding compounds were tested for thermal capacity, thermal conductivity and heat accumulation. The highest heat capacity was achieved in dunite sand. The largest heat accumulation had mixture with chromite sand and the best thermal conductivity was found in a mixture with olivine sand.
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Effects of the Tibial Nerve Stimulation on the Overactive Urinary Bladder
Talová, Dagmar ; Palaščáková Špringrová, Ingrid (advisor) ; Pánek, David (referee)
Title ofwork: Inteďerence ofan overactive bladder by n. tibialis stimulation Aim: The aim of this work to was authenticate whether a 12-week-long Stoller's afferent nerve stimulation can influence the activity of the detrusor of the urine bladder through its inhibition and in this way improve some objective and subjective parametres of urgent incontinence (uroflowmetry, filling cystometry, OAB V8 questionnaire). Method: The group consisted of seven female patients with overactive bladder. The therapy of afferent nerve stimulation lasted for 12 weeks. Before the start of the therapy, and a:fter its completion all the patients were examined for urodynamic functions (uroflowmetry, cystometry). All the patiens also filled in the OAB V8 questionnaire- before and after the therapy- in which only subjective feelings were assessed. Results: The hypothesis in which we presupposed the descensus of the hyperactivity of the urinary bladder was validated with 75% of the patients which was demonstrated by urodynamic examination. Further hypothesis in which we presupposed the increase of the capacity ofthe urinary bladder was not possible to validate or refutate as the average increase of the capacity of the urinary bladder was statistically insignificant. Stoller's afferent nerve stimulation has a long-term...
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The use of (nano)oxides for metal and metalloid stabilization in contaminated soils
Michálková, Zuzana ; Komárek, Michael (advisor) ; Luke, Luke (referee)
The main objective of the thesis was to evaluate the potential of selected Mn and Fe (nano)oxides for the stabilization of metals and metalloids in contaminated soils. The research was focused basically on three materials - commercial nanomaghemite (Fe III), nanomagnetite (Fe II,III) and a synthetic amorphous Mn oxide (AMO). The main aim of the work was to provide a complex view on the chosen stabilizing amendments regarding not just their direct influence on contaminants mobility and stabilization mechanisms, but also their stability and alterations in soil conditions together with influence on soil microorganisms and higher plants. Firstly, adsorption properties of the tested materials towards Cd, Cu, Pb and As were investigated. In this context, the most effective material showed to be the AMO reaching one to two orders of magnitude higher adsorption capacities than Fe III and Fe II,III under given experimental conditions. Interestingly, the rate of As(V) adsorption onto AMO was increasing with increasing pH as a result of high pHzpc of the AMO (8.1) and significant dissolution of this phase at lower pH values. As a next step, the influence of (nano)oxides on metal(loid)s mobility and other physico-chemical soil characteristics after application to contaminated soil was examined. Again, the AMO proved to be the most efficient in reducing mobile pools of Cd, Cu, Pb, Zn and As. On the other hand, Fe III and Fe II,III addition had generally less significant effects on contaminants mobility. AMO application further resulted in an increase of soil pH connected with AMO dissolution and unwanted decomposition of soil organic matter. When (nano)oxides alterations in soil conditions were observed, MnCO3 coatings were identified on AMO surface while no significant changes were recorded for Fe III and Fe II,III. As the MnCO3 formation was connected with increased AMO stability, AMO particles synthetically covered with MnCO3 coating (denoted as SM AMO) were prepared. Although the SM-AMO had a lower mass loss in soil than pure AMO, the stabilizing efficiency was almost the same for both materials. The differences in surface composition of both materials were decreasing with time as MnCO3 naturally precipitated on the AMO surface in soils while the SM AMO coating was gradually dissolving. When investigating the effect on soil microbiota, AMO efficiently promoted soil microbial activity while no significant changes were observed in the case of Fe III and Fe II,III. The AMO was also able to reduce the uptake of Cd, Pb and Zn by sunflower (Helianthus annuus L.), eliminate Zn phytotoxicity symptoms and increase biomass yield. On the other hand, toxic levels of Mn released from the AMO in an acidic soil were found in sunflower tissues. AMO application is thus recommended for contaminated neutral or slightly alkaline pH with a higher cation exchange capacity in order to avoid unwanted release of Mn. Finally, various types of AMO-biochar composite sorbents were recently prepared and field experiment focused on stabilization of Cd, Pb, Zn and As using studied materials is currently under preparation. The combined results from the thesis highlight the importance of a complex experimental approach dealing with all parts of the contaminated soil environment in order to obtain complete information about the efficiency and usefulness of any newly developed stabilizing amendment.
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Network with capacitor microphone using FM modulation
Lapáček, Petr ; Říha, Kamil (referee) ; Káňa, Ladislav (advisor)
In bachelor's thesis I was interested in quality of the electrostatic transducer. I have described a theoretic pieces of knowledges in parts of FM modulations and the variables crystals oscillators. I have tried to propose a conception of the condenser mikrophone in the high-frequency circuit where one of the main part was the crystal oscillator, which part was the capacitor transducer, in capacity element representative uncertain capacities. By this way I have tried to create the modulator, whose modulation depend on the actual changes of capacities in the electrostatic changers. Finally I have interested in the demodulation in this way of creating the HF signal by the help of detection unit TDA7000 and likewise setup of integrated circuit.
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Evaluation of influence of UMTS radio access network parameters on network performance using Opnet Modeler simulation environment
Konečný, Zbyněk ; Škorpil, Vladislav (referee) ; Novotný, Vít (advisor)
This bachelor thesis deals with testing the effect of various parameters and their subsequent influence on the operation of the entire UMTS access network. Each simulation will be implemented in Opnet Modeler, which is used for network testing based on packet switching. The aim of this work is the most effective operation of UMTS networks. Since the UMTS network uses a shared radio environment for all users close to one transmitter, the total capacity of one cell is dependent on the size of interference produced by mobile terminals in the cell. Increasing the capacity of cells can be done by properly elected handover. The first part of this work will therefore concern different types of handovers and their impact on the network operation. Nowadays communication through mobile packet networks is becoming more and more important and that is why the second part of this work will focus on the simulation of traffic UMTS networks. It will be simulated by the behavior of individual applications without the use of QoS. Then the application will be assigned to different quality classes and the quality of service will be compared with simulations without using QoS. The conclusion of this work will contain laboratory work, which should partly make the students familiar with the data traffic in the UMTS network through a simulation program – Opnet Modeler.
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THE EVALUATION OF LEVEL OF THE QUALITY AND AVAILABILITY OF SOCIAL SERVICES IN THE CENTRAL BOHEMIAN REGION IN 2015
Vavrochová, Jaroslava ; Kotýnková, Magdalena (advisor) ; Barák, Vladimír (referee)
The aim of the diploma thesis is to analyse provided social services and to evaluate their current level of the quality ,availability and structure in the Central Bohemian region. Special attention is devoted to the district of Kladno, which is one of the most populous districts of the region. The topic of social services is not only actual from the point of view of demographic trend of the population ageing, but nowadays it is also necessary to give an essential succour to other disadvantaged groups of the inhabitants. It is possible to say that social services have an influence on the quality of life and the current social system is based on the high level of social services and on the comprehension of specific needs of the individuals. The thesis devotes to the availability and structure of social services, which are provided for individual target groups of the inhabitants in the Central Bohemian region. The thesis concludes that social services are afforded in the desirable structure and mainly in bigger cities. The lower number of social services is given in smaller central and peripheral areas of the region. In the district of Kladno there is given the large number of social services of all sorts. They are available in the high quality. Nevertheless, the offer of social services for pensioners is not sufficient, the main reason is insufficient capacity of the long-stay services.
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Application of modified Steiner tree problem on the electricity distribution network in the Desertec project
Vyoral, Martin ; Fábry, Jan (advisor) ; Jablonský, Josef (referee)
The aim of the thesis was minimize the planned cost of construction of the electricity network in North Africa and the Arabian peninsula between solar power plant in Desertec project. The work is divided into three chapters. The first chapter is devoted Desertec concept, its key technologies, benefits and barriers. Another chapter is devoted to the theory of graphs. It consists of an introduction to graph theory, minimum spanning tree and Steiner tree. The third practical chapter is devoted to reduction of the initial projected cost of constructing Electric Supply network using Steiner tree and its modifications. It also addresses the issue of valuation of edges and nodes to which it is necessary to include a number of factors such as energy capacity to be transmitted, the type of transmission medium, environmental conditions, geomorphological aspects and other safety regulatory requirements.
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Availability of social services for seniors in the Karlovarsky region now and in 50 years
Zelinka, Jan ; Kouřilová, Jana (advisor) ; Prudká, Šárka (referee)
Master thesis aims to evaluate the accessibility of social services in Karlovarsky region. The thesis is focused on the demographics of seniors and social services intended for them, specifically retirement homes. In addition to analyzing the accessibility of social services is elaborated demographic projection of region's population over the next 50 years. In the theoretical part is described the definition of social policy and the fundamental theoretical principles, types and functions. This part also describes the legislative framework of social policy in the Czech Republic. In relation to social policy are presented issues of community planning as a tool for the implementation of social policy in the Karlovarsky region. The conclusion of theoretical part is devoted to the theory of demographic projections and describes the basic projection methods. The practical part in the introduction focuses on general and demographic characteristics of the Karlovarsky region and the current state of social services for the elderly, specifically homes for the elderly. The second half of the practical part presents a demographic projection of region's population over the next 50 years and is focusing on senior component whose proportion in the population will increase. This projection is calculated by the component method without migration. The conclusion of the practical part is comparing the initial state of social services and the anticipated development of seniors. It also describes community plan in the Karlovarsky region with emphasis on the development of social services for seniors. Documents drawn up by the Karlovarsky region on issues of social services and conclusions of this thesis suggest that there is no need to increase capacity, but rather to focus on the change in the structure of users and ensure that these services are provided to people whose health condition really requires this kind of complex social care.
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