|
|
Post-quantum cryptography on constrained devices
Matula, Lukáš ; Dzurenda, Petr (referee) ; Malina, Lukáš (advisor)
In recent years, there has been a lot of technological development, which among other things, brings the designs and implementation of quantum computing. Using Shor’s algorithm for quantum computing, it is highly likely that the mathematical problems, which underlie the cryptographic systems, will be computed in polynomial time. Therefore, it is necessary to pay attention to the development of post-quantum cryptography, which is able to secure systems against quantum attacks. This work includes the summary and the comparison of different types of post-quantum cryptography, followed by measuring and analysing its levels of difficulty in order to implement them into limited devices, such as smart cards. The measured values on the PC are used to determine the most suitable implementation on the circuit card and then the verification method itself is implemented on it.
|
|
|
Agreements and Disagreements between Automatic and Human Speaker Recognition
Valenta, Jakub ; Matějka, Pavel (referee) ; Rohdin, Johan Andréas (advisor)
Tato práce se zabývá problémem rozpoznáváním mluvčího. Uvedený pojem je definován a doplněn o jednotlivé metody, které s ním souvisí. Cílem práce je poukázat na shody a rozdíly mezi lidským a automatickým procesem rozpoznávání mluvčího. V úvodu práce jsou popsány teoretické poznatky z obou zmíněných oblastí, tj. na jaké aspekty lidské řeči se zaměřuje člověk, resp. automatický systém. Následně je provedeno několik experimentů, které mají za úkol srovnat tyto dvě metody. Tyto experimenty jsou vyhodnoceny tak, že je možné pozorovat, které testovací úlohy dokáže lépe vyřešit člověk, aby následně bylo možné tyto poznatky použít ke zlepšení funkce automatického systému. V závěru práce je takovýto návrh na zlepšení automatického systému předveden a otestován. Testování proběhlo úspěšně a byla zaznamenána vyšší přesnost při vyhodnocování. Takový výsledek tedy může být užitý v dalších výzkumech a umožnit tak další vývoj v oblasti automatického rozpoznávání mluvčích.
|
|
|
Verification of target volume position in radioterapy
LHOTÁKOVÁ, Vendula
This Bachelor thesis is concerned with the verification of the target volume setup in radiotherapy. With respect to technological advancement, the necessity to use verification systems for ensuring a quality treatment is highlighted. In its theoretical part, the objective of this Bachelor thesis is to summarize and delineate the imaging technologies used to verify the target volume setup. The objective of the practical part is to analyse deviations in the position of the target volume in IMRT technique for prostate radiation; the analysis is primarily directed at new functions in the correction of the position of the radiation table. The theoretical part of the thesis presents facilities used to verify the target volume and summarizes information relating to the two basic methods in radiotherapy: teletherapy and brachytherapy. Differences between X-ray and radionuclide irradiators and particle accelerators are explained. A brief description is given as to the structure of a linear accelerator, with a summary of irradiation techniques applied in radiotherapy. The data for the practical part were derived from results gained by the correction of the position of the target volume in verification imaging at the Radiotherapy Department in České Budějovice Hospital. For the analysis of deviations, a set of 50 patients who were treated for prostate cancer at the Radiotherapy Department in 2018 was selected. During radiotherapy, excepting daily MV-kV imaging, the total of 417 verification CTs was developed for these subjects. Based on these CT images, the deviation in directing the target volume was evaluated and the appropriate correction of the radiation table, and the given patient as well, was performed. The correction of the radiation table allows for the movement of six axes in total, as described in detail in the present thesis. The results gained from the data collected reveal that the correction of the setup of the irradiated volume is a necessity and it is amply used, specifically in all of the six axes. It was discovered that the functions of the table Lat, Lng, Rnt and Vrt are used at virtually all times, and in concrete terms, the newer function of the table Pitch is utilized at 95,03%, with the use of function Roll standing at 92,64%. The daily verification CBCT was performed in 10% of the patients in the set observed. The standard frequency of the use of the verification CBCT at the Radiotherapy Department in České Budějovice Hospital, for patients irradiated to prostate, is approximately 7 - 9 CBCT during the treatment, which includes a CBCT examination at the first setup and then twice during the first week of treatment, and subsequently only once a week during the radiotherapy procedure. The analysis results proved an abundant use of newly introduced options in the correction of the position of the radiation table, and in general, also an improvement in accuracy of directing the target volume. The improvement in accuracy, and therefore an improvement of quality of the administered radiation therapy, allows for changes in the size of the recorded target volumes, specifically the reduction in these volumes. As a consequence, it is logical that the volume of healthy irradiated issue is smaller, which brings (or might bring) for the patient a decrease in the occurrence or level of seriousness of undesired radiotherapy effects. The results of the research and its findings may serve for evaluating the quality of the verification process in radiotherapy, linked with installation of new technologies in the given healthcare department, or, as the case may be, as data and information to be used for preparation of articles published in specialized magazines.
|
|
|
Biometrie a její využití v kriminalistice
VÁCHOVÁ, Ivona
The bachelor thesis is focused on submitting actual and understandable information about biometrics. The aim is to acquaint the public with the possibilities of biometric identification, their technologies and utilization in forensic science. The thesis explains important terms, history of the branch and division of biometric characteristics and identification. The thesis also introduces biometric systems, their criteria and errors. The main part consists of processing of selected identification methods. At the end there is also a possibility of using biometric characteristics in identity papers and forensic science.
|
|
|
Methods For Verification Of Parameters Of
Magnetic Field Sensors
Krejčí, Jakub
Many new sensors appear at the market and occasionally it is required to test specification given by producer. Usually are given conditions of measurement, but the procedure stays undercover. The aim of this article is to suggest and describe simple and repeatable method for testing of magnetic field sensors and verify parameters of selected sensor.
|
|
|
Specific exercises on roller skis for nordic skiers (12-14 old)
Korbelář, Tomáš ; Suchý, Jiří (advisor) ; Gnad, Tomáš (referee)
Title: Specific roller skis' games and acitivities for young nordic skiers aged between 12 and 14 years Goal: Create and verify a collection of games and activities by experts on the rollers skis'for young nordic skiers aged between 12 and 14 years. Methods: A first method used in this work was available analysis of czech and international documents about games and activities. Then a collection of games and activities was made, which was customised for roller skis trainings. Furthermore, there was a verification of collection of roller skis'games and activities with the help of a board of experts composed of experienced and licensed nordic skiers'trainers and then nordic skiers'experts. An unstructured interview was made with them followed by a discussion about each game and activity. Results: In the first part there is a chapter about an equipment used collection created by us. The main part is made of a customised and verified collection of roller skis'games and activities for young nordic skiers aged between 12 and 14 years. Board of experts made a verification added their ideas and suggestions to specific games and activities in the form tips and suggestion. A new chapter dividing the collection was created as a result of a discussion with the board of experts was created at the end of a final...
|
|
|
Acquisition and Recognition of 3D Signature
Molitoris, Miloš ; Dvořák, Michal (referee) ; Drahanský, Martin (advisor)
This work deals with methods of signing in 3D space, selecting a suitable scan model, obtaining a sufficient number of samples to create a database, and finally verifying signatures. The first part deals with the issue of existing solutions and methods of signature verification, further image processing required for marker shooting in 3D space. The following sections are dedicated to design a unique signature solution in free space using a pen without any contact. Two shooting models have been designed using cameras or Leap Motion sensor. The application was implemented based on DTW algorithm using this sensor resulting in a dynamic signature verification system. Furthermore, the work includes a description using of database creation and experimental signature verification. At the end, we find an assessment of the security and error rate of the system that is compared to other methods. The result of this thesis is an application for 3D signature capture and recognition with the potential of a new technique for secure signature.
|
|
| |
|
|
Selected problems from planimetry
MÍKOVÁ, Lucie
This diploma thesis is focused on Selected problems in planimetry. The aim of this diploma thesis is description not only planimetric problems and their verification in a dynamic mathematical program GeoGebra, but also presentation of the author after whom it is called. The thesis is illustrated with pictures, which can help the reader to understand the problem and verification. This thesis can be used as a supplement the curriculum in secondary schools, where using dynamic program GeoGebra and subsequent verification may reach a better understanding of the topic.
|
|
|
Quantitation of transcript bcr / abl in chronic myeloid leukemia
PYTLOVÁ, Kamila
This bachelor thesis in the theoretical part deals with the disease chronic myelogenous leukemia (CML), which accounts for about 25% of the leukemia of the adult age, with maximum incidence in the age group between 50.-70. year of life. With low frequency occurs even in children and adolescents. Chronic myeloid leukemia is characterized by the presence of the hybrid gene bcr/abl, that arises as a result of reciprocal translocation t(9;22)(q34;q11) karyotypicaly detectable as a Ph chromosome. The gene bcr/abl is the hallmark of CML used to refine the diagnosis and monitoring of treatment success. Quantification is carried out either as a relative (often), when the amount of fluorescence of the test gene is compared with the amount of fluorescence of the reference gene, or absolute, when the amount of DNA we are going deduct from the calibration curve, which will provide us with a DNA sample of a given concentration. The aim of this work is to compare different ways of quantification of the transcript bcr/abl. The pursuit of quantification of this transcript has been going on for a long time, involved here organization from around the world. The most sensitive method for detection of the presence of this aberration is the reverse transcription polymerase chain reaction (RT-PCR) detecting the transcript bcr/abl. The second objective of this work is to give an overview of this issue and perform one of the methods for the relative quantification of the gene bcr/abl. The final objective is to get acquainted with the management of samples in the laboratory, and verification and validation of these methods.
|
guest ::
