This is a historical documentary research study across Neva Leona Boyd (1876-1963). The theoretical perspective is based on the historical perspective of knowledge from ancient Greece to the approach of modern symbolic interactionism. The study shows that Boyd, who was Viola Spolins teacher, was a proponent of the modern view of group play theory. 1909 she founded Chicago School for Playground Workers, later transformed to the Recreation Training School. Until 1927, the school entered in Hull-House initiated by Jane Addams. The school was incorporated with Northwestern University. Boyd also worked at other schools and the Illinois Department of Public Welfare, where she designed a recreational program for the mentally ill. Contemporary with Boyd was George H. Mead and John Dewey. Boyd's previous work turns out to have some connection to Sweden when Boyd collected and systematized games from different geographical regions of the world. Boyd’s group play theory are identified and described. Boyd’s group play theory highlights the importance of leadership and the intimacy leaders manage to create in group work.

Certains extraits naturels sont très rares et onéreux. La tentation est alors forte pour les producteurs de matières premières ou intermédiaires d’avoir recours à des adultérations. Le mélange avec des extraits issus d’origines botaniques apparentées, d’origines géographiques différentes, l’ajout d’un composé synthétique présent dans l’extrait naturel ou d’un autre extrait végétal, l’utilisation de produits phytosanitaires réglementés, la mise en place de procédés d’extractions non standardisés, en sont quelques exemples. Ces différences de qualité sont de plus en plus difficilement décelables. Cette thèse a pour objet de mettre au point une méthodologie rapide, efficace et non ciblée. Une approche métabolomique en UHPLC-HRMS est développée pour identifier ces défauts ou pratiques frauduleuses pour les absolues destinées au secteur arômes et parfums. Cette mise en évidence est réalisée par la détection de métabolites marqueurs. Les absolues présentent un défi particulier : entre 50 et 95 % de l’extrait peut être constitué de composés non volatils, rarement décrits dans la littérature. La recherche d’authenticité de ces extraits est alors plus complexe que dans le cas d’un extrait volatil tel qu’une huile essentielle, dont la composition peut être plus facilement déterminée par des techniques analytiques éprouvées et l’utilisation de bases de données. Deux plantes emblématiques de la parfumerie ont été étudiées : la violette (Viola odorata) et la rose (Rosa damascena et Rosa centifolia). Des marqueurs d’origine géographique ont été identifiés dans le cas de la violette, et des marqueurs d’origine botanique dans le cas de la rose. / Some natural extracts are very scarce and expensive. The temptation is therefore very high for producers or brokers to resort to adulterations. Mixing of extracts from related botanical origins, from different geographical origins, addition of synthetic compounds with natural occurrence in the extract, or addition of another vegetal extract, use of phytosanitary products, non-standardized extraction processes, are some examples. The quality differences are more and more difficult to detect. The objective of this PhD study was to develop a fast, efficient and non-targeted methodology. Metabolomics approach in UHPLC-HRMS was developped to identify defects or fraudulent practices in absolutes used in flavour and fragrances. These identifications are realized by the detection of chemical markers. Absolutes are a great challenge: between 50 and 95 % of the extracts consist of non-volatile compounds; moreover these products are seldom described in literature. The quest for validation for authenticity is then much more complex than in cases of volatile extracts such as essential oils, whose composition can be more easily determined by robust analytical instruments and numerous databases. Two symbolic plants used in perfumery were studied: viola (Viola odorata) and rose (Rosa damascena and Rosa centifolia). Markers of French origin were identified for viola, and markers of R. centifolia were identified for rose. Their characterizations were nevertheless the fundamental limit for this technique being at trace level in the extract. This work demonstrated the performance and limitation of the non-targeted metabolomics approach on absolutes, which are specialties of perfumery.

This paper discusses several compositions that use the computer screen to present music notation to performers. Three of these compositions, Law of Fives (2015), Polytera II (2016), and Terraformation (2016–17), employ strategies that allow the notation to change during the performance of the work as the product of composer-regulated algorithmic generation and performer interaction. New methodologies, implemented using Cycling74's Max software, facilitate performance of these works by allowing effective control of generation and on-screen display of notation; these include an application called VizScore, which delivers notation and conducts through it in real-time, and a development environment for real-time notation using the Bach extensions and graphical overlays around them. These tools support a concept of cartographic composition, in which a composer maps a range of potential behaviors that are mediated by human or algorithmic systems or some combination of the two. Notational variation in performance relies on computer algorithms that can both generate novel ideas and be subject to formal plans designed by the composer. This requires a broader discussion of the underlying algorithms and control mechanisms in the context of algorithmic art in general. Terraformation, for viola and computer, uses a model of the performer's physical actions to constrain the algorithmic generation of musical material displayed in on-screen notation. The resulting action-based on-screen notation system combines common practice notation with fingerboard tablature, color gradients, and abstract graphics. This hybrid model of dynamic notation puts unconventional demands on the performer; implications of this new performance practice are addressed, including behaviors, challenges, and freedoms of real-time notation.

This thesis considers the problematic of the object recognition in a digital picture, particularly about the human face recognition and its components. There are described the basics of the computer vision, the object detector Viola-Jones, its computer realization with help of the OpenCV libraries and the test results. This thesis also describes the accurate system of the facial features detection per the algorithm of the Active Shape Models and also related mechanism of the classifier training, including the software implementation.

This master’s Thesis focuses on image processing on Android platform and development of an application, that is able to do face detection and recognition in real scene. Thesis gives highlight of modern algorithms of face detection. It first examines and compares the standard features of Android platform (FaceDetector a FaceDetectionListener) and JJIL, OpenIMAJ, OpenCV libraries experiment, and presents the results. For purposes of face recognition was selected OpenCV library. Three different algorithms of identification were tested: FisherFaces, EigenFaces a Local Binary Patterns Histograms. Based on performance comparison best methods were implemented in developed application.

The thesis deals with automatic control the font size by the distance from the reader. It includes theoretical acquaintance with the face detection and subsequent tracking of the detected area during the scene. Furthermore, there is a comparison of the tracking algorithms. Then the calculation of distance is decribed. It is based on the user’s calibration and based on the outcome occurs the font size is automatically corrected. There is also a description of a separate application Automatical controller of the text size, with the recommended settings of the program.

In the semestral thesis is given basic methods of non-contact measurement heart rate. There is explained Eulerian video magnification method deals with the visualization of the pulse in the videosequence of face. The semestral thesis describes algorithm Viola-Jones face detection in images and algorithm Kanade-Lucas-Tomasi for tracking faces in the videosequence. Part of the work includes design and realization of measurement. There is explained realization of the program and documented execution results, which are discussed. From the results it is designed to guide for optimal recording.

The Sound of the Prairie Land (Caoyuan Zhige) for viola and piano by the Chinese composer Qingwu Guan (b. 1938) has become one of the most popular works in the growing Chinese repertoire for viola. It also exists in another version for viola and viola ensemble, arranged by the Chinese violist Wing Ho, who also expanded the viola part with the composer's approval. The pentatonic work was highly influenced by the landscape and music of Inner Mongolia, a province of China next to the Mongolian border, and incorporates the music of an ode by the Inner Mongolian composer Alatengaole (1942–2011) called Sincere Wishes for a Long Life to Chairman Mao. Guan remains a strong supporter of Mao, the first chairman of the Chinese Communist Party. The work makes use of some performance techniques of the Inner Mongolian two-stringed fiddle called morin khuur, which has a similar tone to the viola: three kinds of slides, grace notes, imitations of a horse's neigh, and the representation of horses galloping across the prairie. The background of the work, understanding of the musical structure, and information about morin khuur techniques presented in this dissertation should aid performers in interpreting the work more authentically.

Thesis (MMus) -- University of Stellenbosch, 2004. / ENGLISH ABSTRACT: This dissertation is an account of Paul Hindemith's life between 1919 and 1939 with special reference to his compositional development through the three sonatas for viola and piano. The introduction to the dissertation initially provides a list of Hindemith's vast output for the viola followed by insight into the reason and need for undertaking this research, literary sources used and their function in the context of this study and the conclusion that there is a lack of extant research on the three sonatas for viola and piano. This is followed by comments on Hindemith as a viola player and composer, supported by opinions of scholars and performers. An overview of the contents and aim of the dissertation completes the introduction. This first of the two comprehensive chapters briefly discusses Hindemith's character traits as viewed by a number of scholars and continues by introducing the political, social and financial circumstances in Germany in 1919. The chapter progresses into a division of the period 1919-1939 into six sub-sections of dates within this time span. Each section focuses on the political, financial and musical circumstances in Hindemith's life, with special attention given to the periods of greatest change and conflict. Included in this chapter are also the specific circumstances surrounding the composition, first performances and publication of the three sonatas for viola and piano, alongside mention of other works written at the same time. This is supported by references and quotations from correspondence between Hindemith and his wife, colleagues and friends, as well as translations of newspaper articles, letters and articles which thus far have not been translated into English. Special attention is given to possible reasons for the late publication of op.25 no.4 in 1977. Chapter 2 looks deeper into the significance, success and development of Hindemith through these three works. His stylistic development beginning with the influences of Debussy and Reger, his identification with the 'Neue Sachlichkeit' until the beginning of his later conservatism can be seen clearly in these three works. The aim of the study is to assimilate the available information into an accurate and coherent picture of the composer's life and stylistic development between 1919 and 1939 in a way that has not been presented before. It is my intention through this work that the unique style of the sonatas as well as their important place in the viola repertoire is apparent, and consequently of interest to other viola players, hopefully encouraging them to play the works themselves. / AFRIKAANSE OPSOMMING: In hierdie tesis word Paul Hindemith se lewe tussen 1919 en 1939 beskryf, met spesiale verwysing na sy ontwikkeling as komponis soos dit waargeneem kan word in die drie sonates vir altviool en klavier. Die inleiding tot die tesis verskaf 'n lys van Hindemith se omvangryke oeuvre vir die altviool, gevolg deur 'n motivering waarom hierdie studie onderneem word. Die omvattende literatuurstudie dui daarop dat daar tot op datum baie min navorsing oor die drie altvioolsonates gedoen is. Vervolgens word kommentaar gelewer op Hindemith as altviolis en komponis, ondersteun deur opinies van uitvoerende kunstenaars en musikoloë. 'n Oorsig oor die inhoud en die doelstellings van die tesis sluit die inleiding af. Die eerste van die twee omvattende hoofstukke begin met 'n bespreking van Hindemith se karakter, gevolg deur 'n oorsig oor die politieke, sosiale en ekonomiese omstandighede in Duitsland rondom 1919. Die tydperk 1919-1939 word dan in ses onderafdelings verdeel. Elke onderafdeling plaas die fokus op spesifieke politieke, finansiële en musikale omstandighede in Hindemith se lewe. Die jare waarin konflik en verandering op besondere wyse na vore tree word meer omvattend bespreek. Teen die agtergrond van ander werke uit hierdie tyd word die spesifieke omstandighede rondom die komposisie, eerste uitvoering en publikasie van die drie altvioolsonates in detail beskryf. Dit word aangevul deur verwysings na en aanhalings uit korrespondensie tussen Hindemith en sy vrou, kollegas en vriende, sowel as deur vertalings van koerantartikels en briewe wat tot dusver nog nie in Engels beskikbaar was nie. Hoofstuk 2 plaas die klem op Hindemith se stilistiese ontwikkeling, soos dit in the drie sonates waargeneem word. Die sonates illustreer Hindemith se ontwikkeling vanaf sy bewondering vir Debussy en Reger, oor sy vereenselwiging met die ideale van die 'Neue Sachlichkeit' tot by die meer konservatiewe benadering wat hy later gevolg het. Hierdeur word gepoog om die unieke waarde van die sonates, asook die belangrike plek wat hulle in die algemene altvioolrepertorium beklee, te beskryf. Hopelik sal die studie die belangstelling van altvioliste wek en hulle aanmoedig om die werke ook self te speel. Die doel van die studie is dus om die beskikbare inligting tot 'n samehangende en akkurate beeld van die komponis se lewe en stilistiese ontwikkeling tussen 1919 en 1939 te voeg op 'n wyse wat nog nie voorheen gedoen is nie. Hierdeur word gepoog om die unieke waarde van die sonates asook die belangrike plek wat hulle in die algemene altvioolrepertorium beklee, te beskryf. Hopelik sal die studie die belangstelling van altvioliste wek en hulle aanmoedig om die werke ook self te speel.

Driving while drowsy is a major cause behind road accidents, and exposes the driver to a much higher crash risk compared to driving while alert. Therefore, the use of assistive systems that monitor a driver’s level of vigilance and alert the fatigue driver can be significant in the prevention of accidents. This thesis introduces three different methods towards the detection of drivers’ drowsiness based on yawning measurement. All three approaches involve several steps, including the real time detection of the driver’s face, mouth and yawning. The last approach, which is the most accurate, is based on the Viola-Jones theory for face and mouth detection and the back projection theory for measuring both the rate and the amount of changes in the mouth for yawning detection. Test results demonstrate that the proposed system can efficiently measure the aforementioned parameters and detect the yawning state as a sign of a driver’s drowsiness.