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Experimental investigation of synthetic jet array
Dančová, Petra ; Vít, Tomáš ; Kotek, M.
Paper deals on an experimental investigation of a synthetic jet array. This investigation focuses on a partial problem of the general task “a synthetic jet array interacting with a channel flow”. The experiments have been performed with water as a working fluid using hot-wire anemometry, laser Doppler vibrometry and particle image velocimetry methods.
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Design of Landscape Management of Horní Počernice
Barešová, Terezie ; Syrovátka, Oldřich (advisor) ; Novotná, Eliška (referee)
This bachelor thesis deals with the assessment of the current landscape management in Horní Počernice and the design of ecological measures, which can be used as a basis for comprehensive land changes of Horní Počernice. The theoretical part defines basic terms of landscaping and landscape ecology. The practical part describes the selected area including processing of ecological characteristics. Ecological measures of landscape are designed to improve the quality of life in Horní Počernice. A research was made to investigate the attitude of residents to the scenic countryside in connection with the expansion of buildings at the expense of vegetation. The conclusion contains an evaluation of the research.
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Is everyone capable of providing first aid?
Bartáková, Lenka ; Šamánková, Marie (advisor) ; Špunda, Jan (referee)
The objective of this paper is to find standard of knowledges about providing first aid in common people. Since I found out, that question of first aid doesn't appeal to people and they don't know the most fundamental elements of first aid, I decided to do research on this subject and to find whether cases which I met are solitary or are usual by majority of inhibitants. And subsequently to devise possibilities to improve standart knowledge of first aid. The collection of data was led through technology of questionaire, whích I distributed in to the different types of public, so that result would have the biggest value. The questions concerned an experience of people with first aid and their information about this problem. The questions were formulated as close with possibility of selection from two or more answers, half-closed questions and open questions where the respondents completed with their job and telephone number for ZZS. The advantage of this collection of data was a contact with respondents and possibility of discussion. Majority of respondents wanted to know, where they made mistakes and why their answer wasn't correct. 300 questionnaires were distributed and 216 was completed. The results of investigation are supporting fact, that public don't show any concern about first aid and therefore...
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The prevention of nosocomial infections at central venous catheters in standard inpatient departments and intensive care units.
PAŽOUTOVÁ, Petra
Nosocomial infections are one of serious problems of modern medicine and nursing also nosocomial infections mean real serious problems for future. Prevention of nosocomial infections, applied together with pointed and meaningful antimicrobial therapy is the only causal solution now. This work was aimed primarily at a comparison of knowledge of common nurses working in intensive care wards and common nurses in standard wards. In general, it could be said that the aim of this work was to map the scope of knowledge of common nurses as for nosocomial infections as well as aseptic care for central venous catheters including catheter sepses. The found deficit in knowledge of common nurses pointed out the occurrence of mistakes in nursing practices. Quality of nursing is connected closely with standardisation of nursing procedures. Quantitative research inquiry was realised in 4 medical facilities: Regional hospital Liberec, a.s., Masaryk city hospital in Jilemnice, Hospital České Budějovice, a.s. and Hospital with polyclinic in Semily. As the research method there was chosen a non-standardised questionnaire. The sample of respondents was chosen as an intentional selectionand and in to statistic processing included 290 relevantly filled out forms. The research investigation also included a comparison and quantification of nursing standards. In view of the performed comparison of standards in nursing we concluded that creation of incomplete or even inconsistent standards occurs here. We have prepared a "Proposal on a standard of nursing care for inserted venous catheter", of which form could enable to implement it in medical care facilities within the Czech Republic and define clearly basic nursing procedures within the scope of these problems.
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NUMERICAL ESTIMATION OF MICRO-CRACK PATHS IN POLYMER PARTICULATE COMPOSITE
Majer, Z. ; Náhlík, Luboš
Determination of composite mechanical behavior is one of important part during the composite tailoring. The aim of the present work was to estimate a micro-crack behavior in a polymer particulate composite. The composite was investigated by means of the finite element method -using ANSYS software. A two-dimensional three-phase finite element model was developed to analyze the crack growth behavior. The assumptions of the linear elastic fracture mechanics were considered and the Maximum Tangential Stress (MTS) criterion was used to predict the direction of the crack propagation. The effect of the elastic modulus of the interphase on the micro-crack propagation was investigated. The properties of matrix and particles were taken from experiment. It was shown that the interphase properties influence the stress intensity factor KI as well as the micro-crack paths. The results of this paper can contribute to a better understanding of the micro-crack propagation in particulate composites with respect to the interphase.
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Intimate relationships of people with schizophrenia
Říhová, Anna ; Loneková, Katarína (advisor) ; Šivicová, Gabriela (referee)
The thesis is dedicated to intimate relationships of people with schizophrenic disorder (F20). The aim of this study was to determine the importance of intimate relationships attributed by women and men with schizophrenia in young adulthood. Their experience, ideals and expectations of partnership were also investigated. The theoretical part is divided into three parts. The first chapter describes the illness of schizophrenia, its characteristics, etiology, epidemiology, symptoms, deficits in cognitive and social functioning as well as current treatments oriented at psychosocial intervention. In the second chapter, the topic of partnerships of common people is presented. The third chapter describes the theme of partnerships in persons with schizophrenic disorder itself. The empirical part is based on qualitative methodology. Semi-structured interviews were undertaken with 11 respondents, investigating intimate relationships and sexuality of people with schizophrenia. The results are properly described and afterwards discussed with the available literature. In the conclusion, it is recommended further research and intervention in social relationships among people with schizophrenia.
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Arctic tundra dendrochronology
Lehejček, Jiří ; Svoboda, Miroslav (advisor) ; Monika, Monika (referee)
Historically unprecedented environmental change in the Arctic ecosystems is often given into the context of its past and possible future development. In the region where instrumental meteorological observations are scarce archives need to be investigated in order to address this issues. The comprehensive synthesis one of the archives: long-live circumpolar evergreen Juniperus communis L. shrub is presented here. 20 individuals from southwest Greenland were investigated at the cell anatomy level to understand the ecology of the species and unhide its potential for environmental and climate reconstructions. The findings are as follows:
i) Stop of exponential cross-sectional conduit-lumen widening with increasing age is in contrast with conduit-lumen nature of trees. This indicates that shrubs do not need to saturate their water and nutrient demands via traits of classical hydraulic conductivity law but rather developed different mechanisms. Extreme weather conditions result in prostrate growth form. However, different weather factors probably influence shrub growth differently: While snow and wind act mechanically (a), temperature influences the form of growth physiologically (b). a) So long as the young shrub stem has high resilience to bend back to an upright position after snow melt and so long as it can withstand the wind during the vegetation season it most likely grows upright and the conduit-lumens widen. b) Temperature, resp. freeze-thaw events are responsible for the shrubs preference of safety (finite size of conduit-lumens) over hydraulic efficiency, thus not allowing for more primary growth. All of these (and other) factors are apparently working together and the transition of vertical to more horizontal growth is gradual. As a consequence, the conduit-lumen sizes may not have to be further increased (due to ecophysiological restrictions possibly also must not) because water is no longer transported against gravity.
ii) Observed age/growth trend has to be taken into consideration for further employment of the wood anatomical parameter in paleoenvironmental studies. That is, shrub cell parameters can only be used for this purposes if correctly detrended. This allows for more accurate as well as longer reconstructions because youth trend was often neglected in reconstructions based on shrub annual-rings.
iii) The south-western Greenland Ice-Sheet (GrIS) melt rates reconstruction is presented for the whole 20th century. This part of GrIS is considered as the most active. According to the presented reconstruction current GrIS melt rates are not uncommon for the last century being comparable to first decades of 20th century. This finding is particularly important contribution to the debate on Atlantic meridional overturning circulation (AMOC). Too high fresh water inputs into the Northern Atlantic from GrIS melting may slow down or even stop the AMOC which would result in more continental climate in Europe. Presented results indicate that this threshold lies higher than observed current melt rates of GrIS.
Fascinating Juniperus comunnis species has shown to be able to address many ecological as well as environmental open questions and due to its longevity and abundant distribution has a great potential to become an important player in the Arctic research.
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Microbiota of the digestive tract of bees and related insect and the influencing facftors
Hroncová, Zuzana ; Havlík, Jaroslav (advisor) ; Kalous, Lukáš (referee)
This thesis consists of six research chapters, out of which, five have already been published in research journals, 1 is in the process of submission and the last chapter presents original unpublished confidential data in the process of manuscript preparation.
The research presented in this thesis concerns the complex mechanisms of bees and wasps immune system focused on microbiota as component of immunity. As shown in the introduction, highly social and managed species of bees like honey bees and bumble bees, play key roles in natural and agricultural ecosystems worldwide. Recent losses of bees have been attributed to pesticide exposure, poor nutrition, increased parasite loads and habitat degradation. Over the past several years, governments, beekeepers, and the general public worldwide have become concerned by increased losses of honey bee colonies, calling for more research on how to keep colonies healthy. Our main aim was to explore the complex mechanisms of bees and related species gut bacterial populations, their links to insect immunity and investigate the opportunities for an intervention. Part of our aim was to characterise the bumble bee and wasp gut microbiota using 16S RNA sequencing in a search for potentially novel bacterial species.
We have tried to explain how microbiome interacts with the host and showed that major members of these communities appear to benefit the host. The simple gut communities of social bees present ideal model systems to investigate the underlying evolutionary and genetic processes of such interactions. Information based on our results may help in the design of proper probiotic supplementation strategies with respect to physiological conditions in the honey bee gut.
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