In order to create a motivational device to help students become more aware of their surroundings, an audio-visual project was chosen as the most effective means of reaching intermediate grade children in a low socio-ecomonic area. Developing an effective sett of motivational experiences for enriching learning through seeing in the art education program was the task undertaken in this study.

De entre los sistemas de reproducción de sonido 3D, Wavefield Synthesis (WFS) presenta una serie de ventajas sobre el resto, principalmente en lo que respecta al gran realismo y sensación de inmersión acústica que proporciona. Otra gran ventaja adicional, es que la zona útil de escucha es muy amplia, superando al resto de sistemas disponibles en la actualidad. La teoría de WFS fue propuesta a finales de los 80 y principios de los 90, no siendo hasta el siglo XXI cuando se han puesto en marcha los primeros prototipos de estos sistemas, aunque muchos aspectos no contemplados en la teoría inicial siguen siendo en la actualidad retos importantes. La presente tesis aborda el estudio de la implementación de los sistemas de WFS aportando soluciones prácticas a las limitaciones tecnológicas que presentan estos sistemas, así como otra serie de problemas de implementación y funcionamiento en tiempo real que, aunque en una primera instancia no se describen como limitaciones físicas, suponen un problema a superar cuando se busca un sistema que funcione eficientemente. El objetivo final de esta tesis es aportar soluciones que contribuyan al desarrollo de un sistema de WFS totalmente funcional, por lo que durante su desarrollo ha sido necesario encontrar soluciones particulares y originales a multitud de problemas de diferente índole. Esta serie de problemas proviene por un lado de las limitaciones físicas de WFS y por otro de la implementación práctica del sistema. Por otro lado también se ha trabajo en los aspectos computacionales relacionados con la implementación en tiempo real de sistemas de WFS, los cuales necesitan una gran potencia de cálculo para dicho funcionamiento en tiempo real sin cortes ni grandes latencias. Este último se ha tratado de forma rigurosa dedicando un capítulo completo para su análisis y propuesta de soluciones eficientes y efectivas en coste. / Bleda Pérez, S. (2009). Contribuciones a la implementación de sistemas Wave Field Synthesis [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/6685 / Palancia

This research was conducted in order to provide information about the effect of sound waves in the growth settings of alfalfa (also known as lucerne) and lentils. Humans have researched about the effect of sound on humans and other animals since the beginning of our time. One of humanity’s oldest research on effects of sound is human communication. In order to expand the research of the effect of sound, this thesis expands to the area of plants. The method used consisted of playing Korobeiniki – also known as the theme song from Tetris – recorded in two versions. One version was played in piano and the second version was played in sine waves, to compare the two different frequency spectrums’ effect on plant growth. Test groups were based on the version that was played; the first group was exposed to piano while the second one was exposed to sine waves. One control group without music was used as well. Among two test groups and one control group, alfalfa and lentils grew in three batches in each group. With each batch having a unique result, the research resulted in a non-generalisable fashion, which suggests further research is vital in order to provide a conclusion which is based on more of a quantitative outcome.

This thesis is focused on entropy sources and their evaluation. It includes a brief introduction to the information theory, description of entropy sources, their parameters and characteristics and methods of evaluation based on the NIST organisation standard SP 800-90B. The following part of the thesis is dedicated to the description of two created programs and evaluation and comparison of entropy sources. Additionally, the last part describes the usage of hash functions in association with entropy sources.

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During my brief career as an instructor in the Quartermaster School, Camp Lee, Va., in 1945-46, I became interested in the use of audio-visual aids by the Army in teaching soldiers various Army procedures. I was subjected to an Army course in the use of Audio-visual aids, and later I designed visual aids for use in the Quartermaster School. At that time I compared the use of these aids by the Army with the possible use of the aids in music education. When I returned to the College of the Pacific, I enrolled in a summer session course in audio-visual aids which was conducted by Thad Stevens of Oakland, California. This thesis is a result of my interest in this subject; an interest that I intend to retain in my work in music education. Of specific interest in the presentation of this thesis is the following quotation from the California Administrative Code: ”Institution to be considered for approval to offer the training and to make the recommendation for the kindergarten-primary, general elementary, junior high school, general secondary and junior college credential must, effective July 1, 1947, maintain a course, or the equivalent, of at least two semester-units in value in audio-visual-radio education and require that such course be successfully completed by each applicant for one or another of the credentials listed above.” As teacher training institutions present courses in the use of audio-visual aids, it is to be expected that the use of these aids will increase in California schools. Music teachers will now be informed in the values of audio-visual education, and many innovations in music education will undoubtedly be presented in the near future.

Master’s thesis deals with developing of multimedia application that allow play and receive multimedia files as audio and video. In thesis introduction, there is theory overview about programming language J2ME, its parts and divisions in couple of chapters. The applications developing begin by choosing focus groups and also group of devices that agree with present trends about mobile devices. The next part undertakes selecting development tool NetBeans IDE based on requirements for multimedia develop and also undertakes selecting software development kit Nokia SDK and its short definition. Afterwards, the application and its basic classes and methods are briefly characterized. The chapters of classes and methods are divided according algorithm level, following development description dividing aspect. Program functions are enriched with flow diagrams completing written text, which have marked important points of program. The main chapters describing algorithm parts begin with define audio and video play. The other pages include description of network connection a data transfers. In every part the programmer part, algorithm is analyzed first and than general options and functionality of this area. In file play part, it is selection of file and proceeding to launch playing with function control possibility. In case of network connection, it is access to network and data handling, eventually communication with each other in client - server hierarchy and consequential multimedia content playing. In the end of development part, reader is cognizant of application fault handling that is inherently part of every application working with I/O data. Next chapter is devoted to future development a design resulting to present process. In the thesis it can be found also application description from user’s point of view, user manual a solving incurred problem situations. In the instructions, there are contained screenshots of described parts of program. Reached results and reviews are summarized on the end of the thesis.

This diploma thesis deals with the objective methods of audio-signal qualification. In detail have been described algorithms to the reader which are used in individual methods. Individual methods are analyzed from computational intensity, ability to predict precisely subjective quality of audio-signals, point of view. There have been described basic variables by which audio-signals are described in further parts of this thesis. Second part has been dedicated to theoretical description of individual methods – their advantages and disadvantages and practical forms of usage. Third part has been dedicated to implementation of two chosen methods in graphical interface of MATLAB program. All the functions are described in detail which these applications offer. In the last part of the thesis there are in detail described results obtained by practical testing of audio-signals with different character in created applications and evaluated quality of reached results as an outcome.

The master's thesis focuses on the study of algorithms dealing with noise separation from musical signal. The first chapter is an introduction into methods which are used for noise removal of the musical signal. Furthermore, this chapter describes theory to the issue, specifically a description of transformations for converting from time to frequency domain, and finally thresholding method of spectral coefficients is explained in detail. The aim of the second chapter is an analysis of the proposed algorithm, which is engaged in testing. From the beginning fast algorithms of gradual transformation are described and then a detailed description of the algorithm as a whole. Later, this chapter deals with the selection of audio recordings and with preparation of these recordings for the actual testing. Finally, testing of audio samples is presented in the third chapter of this thesis. This chapter also concludes comparison of individual transformations, achieved results and review of algorithm.

Objective of the Master Thesis was to bring in two solutions of miniature PC display. One of them uses the VGA signal as the source of the data. The second uses USB for communication. Display using USB was chosen to be produced. Device contains LCD screen, SD card reader and audio DAC with mini speaker. Software running on the PC allows user to watch part of the screen of the computer. Position and size of the chosen part may be varied. The display may be controlled by touch screen. One part of the software running on PC is a simple video player.