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Speech-signal-based recognition of type of transmission channel
Kopřiva, Tomáš ; Burget, Radim (referee) ; Atassi, Hicham (advisor)
This work deals with the classification of five different transmission channels by speech signal processing. The channels considered are: GSM, two PSTN channels and two VoIP channels. For the training and testing purposes, a speech database for the transmission channels called SPLAB_TranCh was constructed. The speech signals of this corpus originally come from well-known TIMIT database, where each utterance passed through each mentioned transmission channel. The main objective of this work is to find optimal features and classification accuracy that yield best classification accuracy. Several types of features, including MFCC, LPCC and spectral characteristics were put under examination. The best suprasegmental features were identified by using mRMR algorithm. Several classifiers were tested as well. The results suggested that the classification of transmission channel can be performed with high accuracy (around 90 %). Influence of adverse effects, which can occur during transmission, is also examined. Considered types of distortions are: saturation, thresholding, echo, crackling noises and different colors of noises and filters.
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Family house with a business activity
Kopřiva, Tomáš ; Manová, Ludmila (referee) ; Maceková, Věra (advisor)
The theme of bachelor’s thesis is a detached house with a business activity in the town Boskovice. The house with two floors is partly basement. The building with flat and functionally separate hairdressing salon. The garage for two cars is a component of the object. The house is designed of the construction system Porotherm. The roof is oblique and double layer with a wooden load-bearing construction.
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Manufacturing of wheel holder for washing machine
Kopřiva, Tomáš ; Císařová, Michaela (referee) ; Podaný, Kamil (advisor)
The project is design technology components by cutting and bending. It is a component, which is used for attaching wheel of waching machine.It is manufactured from sheet steel. Analysis of suitable technologies for the production of manufacturing were selected in the combined processing tools. The tool uses standard components for cutting and bending, which is done on an eccentric press LEN 40 (manufacturer ŠMERAL Brno), with a nominal tensile force 400 kN. The prize of holder is about 8 Kč.
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Fatigue Life Evaluation of Composites Structures
Mihalides, Dušan ; Kopřiva, Tomáš (referee) ; Juračka, Jaroslav (referee) ; Klement, Josef (advisor)
The doctoral thesis deals with fatigue life evaluation of composites structures. The thesis pro-vides complex review of problematic and it is based on recent situation assessment. The main ob-jective of the thesis is to design the methodology of fatigue life evaluation of composites struc-tures. The designed methodology is applied to fatigue life evaluation of sailplane wing and propel-ler blades. One part of the thesis deals with laboratory fatigue tests of composite specimens which are intended for comparison of the effect of manufacturing technology and environment condition.
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Analysis of prosodic and spectral properties of voice communication in air traffic control
Simonides, Jakub ; Kopřiva, Tomáš (referee) ; Smékal, Zdeněk (advisor)
This thesis analyses the prosodic and spectral features of bi-directional air traffic control communication, describes how to communication was split to segments, according to the source, via transcription. After the splitting, the segments are deeply analyzed for their spectral and prosodic features. The analysis itself, focuses on the spectral aspects of intensity, fundamental frequency F0, slope and centroid. Additionally, tempo and voice activity detection data were measured, to support the spectral aspects as well. Because of the differences between the ATC controller’s and pilots’ spectral aspects, the direction of the communication can be automatically determined, with relatively high success percentage.
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Analysis of phonation in patients with Parkinson's disease
Kopřiva, Tomáš ; Smékal, Zdeněk (referee) ; Mekyska, Jiří (advisor)
This work deals with analysis of phonation in patients with Parkinson’s disease (PD). Approximately 90% of patients with Parkinson’s disease suffer from speech motor dysfunction called hypokinetic dysarthria. System for Parkinson’s disease analysis from speech signals is proposed and several types of features are examined. Czech Parkinson’s speech database called PARCZ is used for classification. This dataset consists of 84 PD patients and 49 healthy controls. Results are evaluated in two ways. Firstly, features are individually analysed by Spearman correlation, mutual information and Mann-Whitney U test. Classification is based on random forests along with leave-one-out validation. Secondly, SFFS algorithm is employed for feature selection in order to get the best classification result. Proposed system is tested for each gender individually and both genders together as well. Best result for both genders together is expressed by accuracy 89,47 %, sensitivity 91,67% and specificity 85,71 %. Results of this work showed that the most important vowel realizations for phonation analysis are sustained vowels pronounced with maximum or minimum intensity (not whispering).
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Home for the enderly people
Kopřiva, Tomáš ; Manová, Ludmila (referee) ; Maceková, Věra (advisor)
The theme of diploma thesis is processing of the design documentation of a home for the elderly people in the village Benešov u Boskovic. The house with three floors is without basement. The building is operationally divided into several separate parts. The mainly part of the building is for living of elderly people. The rest of the building consists of several partial operational units. The house is designed of the construction system Porotherm. The warm flat roof is with a concrete load-bearing structure.
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Development of experimental sets for a new conception of Optics in the Interactive Physics Laboratory I
Kopřiva, Tomáš ; Kácovský, Petr (advisor) ; Koudelková, Věra (referee)
The main goal of this thesis is to create five experimental units and worksheets for an experimental set called Optics: Qualitative approach in the Interactive Physics Laboratory - a project of the Department of Physics Education. The Interactive Physics Laboratory is shortly described in the first chapter, along with information about the course of experimenting in it and feedback we receive from attendees. The second chapter is focused on theoretical background about geometrical optics, the human eye, the sight and selected misconceptions about optics and sight. The experimental units were based on this theoretical background. The development (including feedback from students) of the experimental units and related worksheets as well as the final form of the experimental units and their worksheets can be found in the third chapter.
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Analysis of prosodic and spectral properties of voice communication in air traffic control
Simonides, Jakub ; Kopřiva, Tomáš (referee) ; Smékal, Zdeněk (advisor)
This thesis analyses the prosodic and spectral features of bi-directional air traffic control communication, describes how to communication was split to segments, according to the source, via transcription. After the splitting, the segments are deeply analyzed for their spectral and prosodic features. The analysis itself, focuses on the spectral aspects of intensity, fundamental frequency F0, slope and centroid. Additionally, tempo and voice activity detection data were measured, to support the spectral aspects as well. Because of the differences between the ATC controller’s and pilots’ spectral aspects, the direction of the communication can be automatically determined, with relatively high success percentage.
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Teaching-learning activities from thermal physics at different school levels
Kopřiva, Tomáš ; Koudelková, Věra (advisor) ; Kácovský, Petr (referee)
Title: Teaching-learning activities from thermal physics at different school levels Author: Tomáš Kopřiva Department: Department of Physics Education Supervisor: RNDr. Věra Koudelková, Ph.D., Department of Physics Education Abstract: This bachelor thesis focuses on demonstrating how the pupils' understanding of concepts from thermal physics develops over their studies at primary schools and secondary schools at three levels. Laboratory work materials for pupils are also available for each concept and experiments are demonstrated on videos. Keywords: thermal physics, experiments, Framework Educational Programmes
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