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Statistical Expectation of High Energy Physics Data Sets Separation Algorithms
Hakl, František
Article focuses on the application of the basic results of the statistical learning theory known as Probabilistic Approximately Correct learning in the evaluation and post-processing of unique physical data obtained from the detectors of particle accelerators. The aim of this article is not direct separation of the measured data but evaluation of the appropriateness of separation methods used. The main principles and results of the PAC learning theory are briefly summarized, the main characteristics of selected multivariable data separation algorithms are studied from the VC-dimension point of view. Finally, based on actual data sets obtained from Tevatron D$\emptyset$ experiment, some practical hints for separation method selection and numerical computation are derived.
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Individual human odor as a forensic trail in criminal proceeding made by contact or contactless transmission and its resistance to physical agents
Santariová, Milena ; Bartoš, Luděk (advisor) ; Chmelíková, Eva (referee)
The dissertation thesis consists of four papers that have been published in scientific journals.
Study n. 1
The need to recover evidence from water is quite common in criminal investigation. The article deals with the possibility to collect human scent from such objects and with the ability of specially trained dogs to match such scent samples with scent samples collected from detained suspects. During an experiment, designed as a blind one, it has been proved, that human scent can survive on submerged objects and can be later used for scent identification.
Study n. 2
To collect odors the Czech Republic Police use special fabric sorbents manufactured under the registered mark ARATEX. Before use the fabric sorbent is treated by water vapor sterilization. After the scent identification the sorbent is destroyed. The goal of the study was to verify if the vapor sterilization is effective enough to remove human scent that has already penetrated into the sorbent structure or in other words if the sorbent can be exposed to vapor sterilization and then used again. Specially trained dogs were used to match starting odors with target odors in the line-ups. The results showed that dogs are able to correctly match human odors even after they have being exposed to vapor sterilization.
Study n. 3
The purpose of the study was to determine the temperature at which the human scent is degraded so that a dog would not be able to identify it. In contrast to expectations, eight dogs used in the experiment almost flawlessly identified human scents from five scent donors exposed to temperatures of 100°C, 200°C, 300°C, 400°C, 500°C, 600°C, 700°C, and 800°C. Only two of the dogs were able to identify 5 of 15 scent samples exposed to 900°C. No dog identified a scent exposed to 1000°C. Our study verified heat survivability of human scent far beyond existing expectations.
Study n. 4
We tested the hypothesis that if odor fallout (the release of a human odor onto an untouched object) in human subjects exists, then holding a hand above an absorbent will produce a detectable scent which will be subsequently matched in a detection test by trained dogs. Scents were collected from seven males to sterile cotton absorbent squares. The left hand was used to get the control scent and the right hand served as the target scent. Each experimental subject was sitting and his left hand was laid down on a cotton square for 3 min. The right hand was held 5 cm above another cotton square for 3 min. The scent identification was done by two specially trained police German shepherds. Both dogs performed 14 line-ups and correctly matched the collected scents of all test subjects. The results suggest the existence of human odor fallout, whereby a human scent trace is left by humans even if they do not touch an object.
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Physically-based Modeling and Simulation
Dvořák, Radim ; Racek, Stanislav (referee) ; Šujanský,, Milan (referee) ; Zbořil, František (advisor)
Disertační práce se zabývá modelováním znečištění ovzduší, jeho transportních a disperzních procesů ve spodní části atmosféry a zejména numerickými metodami, které slouží k řešení těchto modelů. Modelování znečištění ovzduší je velmi důležité pro předpověď kontaminace a pomáhá porozumět samotnému procesu a eliminaci následků. Hlavním tématem práce jsou metody pro řešení modelů popsaných parciálními diferenciálními rovnicemi, přesněji advekčně-difúzní rovnicí. Polovina práce je zaměřena na známou metodu přímek a je zde ukázáno, že tato metoda je vhodná k řešení určitých konkrétních problémů. Dále bylo navrženo a otestováno řešení paralelizace metody přímek, jež ukazuje, že metoda má velký potenciál pro akceleraci na současných grafických kartách a tím pádem i zvětšení přesnosti výpočtu. Druhá polovina práce se zabývá poměrně mladou metodou ELLAM a její aplikací pro řešení atmosférických advekčně-difúzních rovnic. Byla otestována konkrétní forma metody ELLAM společně s navrženými adaptacemi. Z výsledků je zřejmé, že v mnoha případech ELLAM překonává současné používané metody.
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Coping strategies in children´s fear and pain in relation to nursing care
PROCHÁZKOVÁ, Zuzana
For the nurse, taking care of hospitalized children is important not only pediatric nursing knowledge, personal and social preconditions, but also the theoretical and practical competency of methods and techniques, which are used for identification and effective influencing of pain and fear. The aim of this thesis was to identify the main sources of fear of the hospitalized preschool and young school age children and to find out the effective methods and principles of the cooperation with children, alternatively with their accompanying parents in order to moderate the fear of the small patient. Then the thesis tried to chart the nursing diagnostic and evaluation procedure of the pain and get the most used nursing methods of non-pharmacological pain relief. To obtain the necessary data, the qualitative research was used with a semi-structured interview as a research instrument. The first research group consisted of 12 nurses, the second group consisted of 12 children ´s patients of preschool and young school age. The majority of the asked nurses thinks, that children´s patients are afraid especially of non-familiar environment, then of the awaited pain and of the solitude without parents. However, the most patients said, that they were afraid especially of pain, then of non-familiar environment, restriction of their needs, hostile attitude of the medical staff and of the other neighbouring patients. They were also frightened of the death and of the darkness. Most reported nurses mean, that the most effective solution of the children ´s fear is the friendly attitude of the medics. They also mentioned the fact of taking the focus off the fear and the presence of the parents is also beneficial. The nurses ´ answers were in conformity with patients opinion in two fields - friendly attitude of the medics and taking the focus off the fear. Then the children mentioned abiding of their specifics in connection to falling asleep and the demand of beying treated by the same sister or by few same sisters. All respondents also talked about the benefit of parents presence. Regarding the principles of the cooperation, nurses answered the importance of united medical procedures, especially the proper way of information transfer. Then the respondents nurses mentioned the psychical and emotional support for children and their accompaniments, the atmosphere of confidence and the value of well done education. Also the need of calm, silence and privacy was stated. Unlike nurses, children and their parents regarding to principles of the cooperation prefer the psychical and emotional support, then the importance of enough information was mentioned. The fourth research question bears on the methods used for children pain monitoring. The nurses said, that the intentional interview with the patients or with the parents was used as a main technique, that was stated by patients as well. Research question number five said: What are the most used nursing methods of non-pharmacological pain relief at children? Most responded nurses mentioned the distraction of children attention from the painful incentive, then the importance of physical methods, relief position and purposeful preparation for the unpleasant intervention. Nurses also named the helpful contribution of the parents, relaxing exercises and the method of imagination. Regarding the pain treatment, it was noted, that all patients prefered the analgesic therapy. Then they quoted the distraction of their attention from the painful incentive, the friendly attitude of the medics, using the ice compress and the relief position. In the pain acute phase, children required mostly calm, comfort and privacy. All children also considered the presence of parents as very helpful. The theoretical and empirical part of the thesis are suitable for being studied by nurses taking care of children and it can be helpful for nursing quality improvement at children ´s wards in hospitals.
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Lifestyle of patients with peripheral arterial disease before and after surgery
REZKOVÁ, Helena
Theoretical background: Peripheral arterial disease is a serious disease of Loir limb arteries which originates from atherosclerosis. The theoretical part deals with the lifestyle. There are mentioned basic risk factors of chronic forms. Further described are the pathophysiology changes generated on the basis of atherosclerosis and related causes for the origin of the disease. Subsequently there are explained methods of classification, developed clinical symptoms, diagnosis and therapy. This section also looks at the role of a nurse in the care of patients with peripheral arterial disease. Objectives: The aim of this work was to evaluate how patients with peripheral arterial disease changed their lifestyle after invasive vascular surgery. There were provided the following research questions: How do patients with peripheral arterial disease approach to the prevention of risk factors? What is in patients with peripheral arterial disease the main impuls for the possible change of their lifestyle? What influences surgery patient's attitude to risk factors for peripheral arterial disease? How crucial is a lifestyle change in patients after surgery for peripheral arterial disease? Methods: The theoretical part is processed using expert sources. The empirical part of the theses was processed using qualitative research. The chosen technique for data collection was semi-structured interviews with patients, with prepared open questions. The research was done in several phases - the first interview was conducted at the patient admission department (before surgery), followed by the next phase after three months, and 6 months after surgery. The interviews were recorded on a prepared form, then transcribed into electronic form and analyzed by open coding method. Results: The research showed that surgery can sometimes be triggered by changes in the patient's lifestyle. The first interviews in the preoperative period focused on how respondents felt, what was their lifestyle before surgery for atherosclerotic changes of the lower extremities. One of the questions was focused on patient knowledge about risk factors for the development of PAD and possible prevention. The second phase of interviews took place 3 months after the surgery. It dealt with the question about the respndents´ lifestyle, the respondents in the postoperative period, whether there were any changes. Some positive changes occurred in eating and there were some changes in doing physical activity. The third stage was carried out six months after surgery, again in order to detect changes in lifestyle. Minor changes came in smoking habits, the issue of diet and physical aktivity. Questions were also focused on the psychological level. We found out who helped patients and what was most motivating in implementing changes. In the conclusion/summing up question the patients marked themselves ow they managed to make a change. Conclusion: The number of patients with peripheral arterial disease and other cardiovascular diseases is increasing. The basis is the start to modify risk factors, namely tobacco use,dietary habits, physical activity. The medical staff members participate on changes in patients´ lifestyle by appropriate education. The problem occurs when the patient despite the support of close people can not cope to carry a twist in their life. There should a medical staff member offer a professional help to deal with this important step. Practical use: The aim is to draw attention to the expansion of education about lifestyle changes for patients diagnosed with PAD also in the postoperative period. Patients who are released to home care should receive enough information that would convince them to change their attitude towards their health, and that surgery is only one of the ways to prevent further attacks and complications. Results can improve communication with patients and focus on increasing their awareness and possibly offer assistance.
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Iniciace pohybu byčíku, signalizace a regulace pohyblivosti spermií ryb: fyzikální a biochemické řízení
PROKOPCHUK, Galina
The current study attempted to shed light on the regulatory processes and response arrangements of fish spermatozoa during the course of maturation and motility initiation. The first intent of this study was to improve the understanding of the mechanism underlying the acquisition of potential for sperm motility in sturgeon. Up to present work, the physiological process underlying sperm maturation in this species has not been described at all. Our results showed that sperm maturation in sturgeon occurs outside the testes because of dilution of sperm by urine and involves the participation of high molecular weight substances as well as calcium ions present in seminal fluid and/or urine. The second aim of the present study was to investigate the coping mechanisms in fish spermatozoa with osmotic and ionic activating mode, as well as in spermatozoa of euryhaline fishes, to various environmental conditions. We showed that alteration of environmental osmolality might affect the fish sperm in different ways, depending on fish species and modes of spermatozoa motility activation either osmotic or ionic mode. In response to osmotic stress caused by hypotonicity, carp spermatozoa regulated the flow of water across their cell membrane and increased their cytoplasmic volume during their short motility period. In contrast, no indications of sperm volume changes were observed neither in sterlet nor in brook trout spermatozoa, both of which having an ionic mode of motility activation. We also examined the mechanism by which sperm motility triggering in euryhaline fishes can adapt to a broad range of environmental salinity. Our results demonstrated that spermatozoa of euryhaline tilapia, Sarotherodon melanotheron heudelotii, reared in fresh-, sea- or hypersaline water can be activated in hypotonic, isotonic or hypertonic conditions of swimming milieu, provided Ca2+ ions are present at various levels. It was established that the higher the fish rearing salinity or the more hypertonic ambient media at spermatozoa activation, the higher extracellular concentration of Ca2+ ions is required. The results obtained in the present study allow suggesting that osmolality is not the main factor inhibiting sperm motility inside the testis in the S. melanotheron heudelotii. A third aim of this study was investigation of the regulation of motility initiation process and description of flagellar beating initiation in chondrostean spermatozoa. We detected that K+ inhibition of sperm motility in sturgeon can be by-passed due to the pre-exposure of sperm cells to a high osmolality shock prior to its transfer to K+-rich swimming media. Thus, we hypothesized that sturgeon spermatozoa may be activated by use of an unexpected signaling pathway, independent from regular ionic stimulation. The successive activation steps in sturgeon spermatozoa were investigated by high-speed video microscopy, using specific experimental situation, where sperm motility initiation was delayed in time up to several seconds. At motility initiation, the first couple of bends formed at the basal region begins to propagate towards the flagellar tip, but gradually fades when reaching the mid-flagellum. This behavior repeats several times until a stage where the amplitudes of bends gradually reach similar value, what eventually leads to sperm progressive displacement. The total period needed for the flagellum to switch from immobility with rigid shape to full activity with regular propagating bends ranges from 0.4 to 1.2 seconds. In conclusion, the results of the current study bring valuable pieces of information into the general understanding of the processes of maturation of fish spermatozoa, their adaptability to different physical and biochemical circumstances, the extra- and intra-cellular signaling as well as the regulatory mechanisms of motility activation in fish spermatozoa.
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Comparison of HPLC a GC-MS method for pesticide determination in soil
Chalbia Václavíková, Alena ; Kočárek, Martin (advisor) ; Havlík, Jaroslav (referee)
Physical and chemical properties of pesticides may vary significantly. Pesticides can be acidic, neutral or alkaline. Some compounds containing phosphorus, other sulfur, nitrogen or halogens. These atoms can be important for the detection of pesticides. Some of the compounds are volatile, others on the contrary not evaporate, which is also one of the important properties for chromatography. The diversity of pesticides actually makes it impossible to create a universal method, which is very impractical in terms of quality and time determination. Because that pesticides are one of the most chemicals in most countries. In the food and drinking water are limits on pesticides in order to avoid negative impact on public health. For residues in soil or surface water limits are set. (Lutz et al., 2006)
The objective of this thesis is to evaluate the possibility of using two types of chromatographs with different detectors for the analysis of pesticide. Pendimethalin which was chosen for this work, will be analyzed usinga liquid chromatograph with UV detektor and gas chromatography with mass detector. Both this method will be compared as well two extraction methods (Soxhlet extraction and shaking), and two extraction agents (methanol and acetonitrile).
Another point of the work is to provethe hypothesis that, for the determination of pendimethalin in soil is by gas chromatography using a mass spectrometer in comparison with the high performance liquid chromatography time and more expensive, but will achieve a higher yield and a lower detection limit of the pesticide.
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Nursing care in trauma centras in the Czech Republic
POLANOVÁ, Alena
Abstract The thesis deals with the issues of nursing care in trauma centres in the Czech Republic. Injuries requiring complex and multidisciplinary treatment apart from surgery therapy are still more frequent nowadays. This is why trauma centres have been established in the Czech Republic. Their establishment increases demands for caring staff of non-physician fields. These increasing demands are of mental and physical character and of course demands for further education. The aim of the thesis was to find what opportunities nurses of trauma centres have in the field of further education, what are their biggest problems and how they cope with mental and physical stress in their work. The following hypotheses were set upon qualitative research in the form of unstructured interviews with nurses of trauma centres. Hypothesis 1: Nurses working in trauma centres prefer specialization education to tertiary education. Hypothesis 2: Nurses working in trauma centres cooperate with nurses from other clinical branches on provision of nursing care. Hypothesis 3: Nurses working in trauma centres get education not only in traumatology, but also in further clinical fields. Hypothesis 4: Nurses working in trauma centres cope with mental stress. Hypothesis 5: Nurses working in trauma centres cope with physical stress. Quantitative research in the form of questionnaires was applied on confirmation or refutation of the hypotheses. The research sample consisted of nurses working in trauma centres in the Czech Republic. Upon evaluation of the results hypotheses 1, 2 and 5 were confirmed and hypotheses 3 and 4 were refuted. The research results confirm that the work of nurses in trauma centres is hard in terms of mental and physical stress. There are still some reserves in further education of nurses not only on the part of the top managements but also on the part of the health care staff themselves. The thesis result may help in recruiting new staff to departments where the expected psychical and physical intensity might be an incentive to the care about an employee in the field of mental hygiene and improvement of interdisciplinary cooperation in trauma centres in the Czech Republic.
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Environmental variables acquisition and evaluation
Ulrych, Vladislav ; Vasilenko, Alexandr (advisor)
The first part of thesis is devoted to the environment of the room in which is monitoring device intended - server room. There are description of calculating algorithms for proper sizing of cooling due to the heat. Further in this part is description of suitable senzors for monitoring device - physical principle, their proper use and meaning. Theoretical part also contains a list of several available ready commercial solutions of monitoring stations and their characteristics.
The second part is devoted to the assembly of monitoring device - physical build of hardware components, preparation s and connecting sensors, operating system installation, configuration and network preparation. The second part contains also instaling web server and configuration parts, that allows amek a web interface with presentation of measured physical quantities. Integration device with Simple Network Management Protocol (SNMP) for use with Zabbix monitoring system. Output from this work can be used for monitoring fundamental physical quantities in a small server room or in switch room.
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Evaluation of selected properties of mineral fibers-based board, including the design of suitable purposes of its application
Sýkora, Radim ; Böhm, Martin (advisor) ; Múčka, Martin (referee)
This thesis evaluates properties of board based on mineral fibers. In first part of the thesis is conducted analysis of the literature, where are described materials based on basalt fibers. Here is also explained production of basalt fiber and its practical applications. Sandwich materials and materials with great fire resistance based on wood are also looked into. Following part describes options of aplication of materials with great fire resistance and mechanical a physical properties of materials based on wood.
Second part of the thesis lays out methodical approach to individual performed mechanical and physical tests. Characteristic of examined material is included. The last part deals with test results, comparing results with other selected materials, debating results and proposing possible applications of examined basalt board. With use of found data is evaluated suitability of the material for use for construction of sandwich panel.
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