This master thesis discourses upon problems with automatic building and testing of network security solution AVG for Linux/FreeBSD on platforms GNU/Linux and FreeBSD. This work introduces AVG for Linux/FreeBSD and its usage.  Compilation and link are discussed from the source code to the distribution packages, which users can install on your computer. Also, the repository term was introduced, containing the information about their creation and usage. The part about AVG for Linux/FreeBSD testing discusses suitable  automatic testing proposals for this product and implementation of the best solutions. In the practical part, the testing tool was developed. AVG for Linux/FreeBSD was tested using the test tool and implemented test set.

Title: Comparison of selected characteristics of men's matches on international level of a lower category Objectives: The objective of this thesis is to find out what the game pace was at Maia Open 2019 and at RPM Prague Open 2019, and to compare the difference in game pace from matches in the first rounds to matches in the final rounds of the tournament (the semifinal and final), then compare match characteristics between tournaments and find out effect of a serve on game pace. Methods: The methods used in this thesis are indirect observation and system notation analysis. When evaluating the overall average of all variables from 10 matches at Maia Open 2019, the number of players was N = 17, with an average placement of ATP M = 442,8 ± 272,0. When evaluating the overall average of all variables from 10 matches at RPM Prague Open 2019, the number of players was N = 13, thereof players N = 8 with an average placement of ATP M = 529,0 ± 77,6 and players N = 5 with an average placement of ITF M = 832,6 ± 578,6. The monitored variables were rally time, time out length and the number of hits. The game pace was calculated from the rally time and the number of hits. The relationship load was evaluated from the time out lenght and the rally time. Results: The average game pace is 1,36 s at Maia Open 2019....

M. Tech. (Department of Metallurgical Engineering, Faculty of Engineering and Technology), Vaal University of Technology. / To meet the ever-increasing demand for maintenance of gear systems, industrial companies have traditionally depended on the shutdown of the machines before processing the fault diagnosis. Nowadays, online monitoring has proven to be effective in terms of machine state analysis and fault prediction. However, the application of such a technique in the analysis of combined multiple nonlinear faults is still a subject of research. The vibration signature of a coexisting nonlinear crack and pit in two-stage gear system is unknown, it can be regarded as one of the most difficult problems to extract and diagnose. Additionally, incorporating both a crack and a pit into numerical models is a time-consuming process that demands a breadth of mechanical understanding. Diagnostics of faulty gears, on the other hand, can be performed in the time and frequency domain or in the Time-Frequency domain, depending on the complexity of the vibration. Non-linear and non-stationary phenomena (Features) occur when repeated pitting and cracking faults occur, reducing the reliability of standard signal processing methods (Gear displacement and Fast Fourier Transform). This thesis solves each of these shortcomings by developing an eight-degree-of-freedom (DOF) gear model with a breathing crack and multiple pitted gear teeth. The identified spur-gear model enabled the investigation of the crack and pitting signatures and their effect on the ensuing vibrations independently of the action of other system components. Additionally, when pitting and cracking coexist, the study was conducted to determine the influence of such a failure on the transmission system. Theoretical results indicated that the presence of pitting and crack in the tooth of the gear resulted in a decrease in mesh stiffness. Additionally, the influence of the breathing pitting and crack results in material fatigue, which results in the generation of a random term in the vibration signal. To corroborate the acquired results, several experimental tests on a spur-gear test rig with a defined pit and crack size range were undertaken under a variety of conditions. In comparison to the presented methodologies, theoretical and experimental results indicate that 3D Frequency-RPM analysis is the most sensitive and resilient method for the early detection and identification of pit and crack faults. Furthermore, when crack or pit faults are studied individually, the STFT analysis yields interesting results. The feature analysis revealed that, when using the Time-Frequency technique, the crack and pit combination in a two-stage gear system is a priori more efficient than the other options.

Šiame darbe nagrinėjami netiesiniai daugdarų atpažinimo metodai ir daugiamačių duomenų projekcijos metodai. Siūloma jais spręsti keliais laisvės laipsniais besisukančio objekto orientacijos radimo problemą. Aprašomi MDS, Trianguliacijos, Sammon, RPM, mRPM, CCA, PCA, LLE, LE, HLLE, LTSA, SMACOF ir Isomap metodai. Su kai kuriais iš jų atliekami web-kamera gautų galvos atvaizdų tyrimai. Isomap algoritmo pagrindu sukuriama programinė įranga ir su ja taipogi atliekami galvos orientacijos tyrimai. / This paper deals with Analysis of non-linear manifold learning methods and multidimensional data projection methods. It is proposed use them in solving problem of detection of orientation of object, moving in few degrees of freedom. Methods described: MDS, triangulation, Sammon, RPM, mRPM, CCA, PCA, LLE, LE, HLLE, LTSA, SMACOF and Isomap. Some of them are used to analyze head images acquired by webcam.. Application is created which is then used to analyze head orientation by implementing Isomap method.

Objetivou-se colocar em evidência as políticas realizadas na função repressiva do Sistema Brasileiro de Defesa da Concorrência (SBDC) sobre a fixação de preços de revenda (FPR) a partir da Lei n. 8.884/1994 (revogada pela Lei n. 12.529/2011). Do mesmo modo que a conduta poderia acarretar consequências perversas ao ambiente concorrencial, a falta de padrões claros para caracterizar a conduta como ilícita também pode ensejar efeitos deletérios ao ambiente institucional protegido pelo SBDC. O problema central da pesquisa está nos arranjos institucionais para promover a maximização da segurança jurídica no contexto da FPR no SBDC. Partiu-se da hipótese de que essas alternativas institucionais podem ser encontradas no próprio arcabouço normativo no SBDC, sem prejuízo de outras soluções estruturais. A partir dessa premissa, foi aplicado o método de análise de instituições para resolver um problema de arcabouço institucional aplicado. Inicialmente, o método abordou uma análise como um fim descritivo, objetivando identificar os elementos/particularidades do ambiente recortado para delimitar os contornos do problema da pesquisa. Para tanto, foram analisadas as decisões paradigmáticas do Cade sobre o tema. Ato contínuo, passou-se à função analítica aplicada do método, para formular um instrumental propositivo a respeito das possíveis falhas do arcabouço anteriormente estudado. Para tanto, a linha de raciocínio subjacente à tarefa foram os métodos dedutivo e hipotético-dedutivo, tomando como fontes a bibliografia especializada, além das estruturas balizadoras do ordenamento jurídico nacional. Concluiu-se que a estabilidade institucional é um dos fatores a ser considerado na promoção da defesa da concorrência, devendo ser garantida na intersecção entre as funções repressiva e educativa do SBDC, isto é, por meio de medidas educativas (medidas ex ante de conscientização) antes de medidas sancionadoras (ações punitivas ex post). Cabe ao Cade considerar os postulados da razoabilidade e proporcionalidade não apenas em suas atividades-fim, mas também nos reflexos de seus atos administrativos sobre o ambiente institucional, o que inclui o dever de proteção da segurança jurídica. Portanto, qualquer inovação institucional in pejus ao administrado aplicada pelo Cade, inclusive no caso de standards interpretativos, deverá ser considerada na perspectiva dos pilares da lei de processo administrativo como ponderação necessária, vedadas medidas contraditórias àquelas que se têm praticado no mesmo ambiente institucional. / The research encompasses the policies enforced by the Brazilian System of Competition Defence (SBDC) with regard to Resale Price Maintenance (RPM). While the conduct may produce a negative impact over competition - reducing the welfare of consumers -, the lack of predictability from the rulings enforced by SBDC on the subject might, likewise, produce deleterious outcomes to the institutional environment. The focus of this research rests on the premise of promoting a maximization of legal security in the context of RPM within SBDC. The initial hypothesis is that the institutional alternatives may be found within the very normative scope of SBDC, without prejudice of other structural solutions. Based on those premises we applied the Analysis of Institutions method in order to solve the issue within an institutional scope. Such method encompassed the analysis as a descriptive means, with the objective of identifying the elements/particularities of the given environment in order to define the contours from the object of the research. Subsequently, we moved on to the analytical method in order to instrumentally investigate possible flaws within the scope of what was previously studied. Thus, the subsequent lines of thought were both deductive and hypothetico-deductive. As a conclusion, the institutional stability is one of the factors to be considered in the promotion of competition defense, and it should be warranted within an intersection of repressive and educative functions from the SBDC, that is, through educative measures (ex ante) before repressive actions (punitive actions, ex post). It was concluded that institutional stability is one of the factors to be considered in promoting competition and should be guaranteed at the intersection between the repressive and educational functions of the SBDC, that is, through educational measures (ex ante measures) before punitive measures ex post. It will always be up to Cade to consider the claims with regard to reasonability and proportionality, not only with regard to the end activity but also with regard to the outcomes over the institutional environment - which also encompasses the duty of legal protection as well. Moreover, the notion of restrictions of competition \"by the object\" - as well as any institutional innovation contrary to the ones previously administered - should be considered from the perspective of the pillars of the Administrative Process Law.

This project proposes an automated system that allows a registered user to post questions to a web-based database of technical experts. This enables the user to have a quicker response time to their questions. The users questions and answers are posted to the website.

This thesis deals with the hydrodynamic plain bearings tractor diesel engine. The first part is closer acquainted with the hydrodynamic bearing, its principles and materials used. The next part work deals with the multibody system adams-engine. The main part of this work is to model the crank mechanism and its storage in hydrodynamic bearings in the MBS program and the subsequent simulation under different operating conditions.

L’autonomisation de l’art instrumental arabe et, plus particulièrement, l’éclosion de l’art improvisatif du taqsīm au ‘ūd, sont concomitants à l’avènement de l’ère discographique et du 78 tours (1903) en Égypte, notamment avec les enregistrements de Sayyid a-s-Suwaysī, tandis que l’apogée de cet art attendra les années 1920, avec les développements apportés à cette pratique par Muḥammad al-Qaṣabgī, surnommé Sultan du ‘ūd. L’émergence du 78 tours est anticipée par une véritable renaissance musicale, menée par des musiciens de génie attachés à la cour d’Ismaël Pacha et ses successeurs. Le développement du pendant instrumental de cette école (nommée la Nahḏa), qui est inhérent au ‘ūd, est lié notamment à l’apparition au cours du dernier tiers du XIXe siècle d’un nouveau modèle de cet instrument. Les caractéristiques géométriques de ce nouveau model (taille, rapport entre longueur de corde vibrante et longueur du manche etc.) le distinguent nettement de son prédécesseur tel qu’il est décrit par les auteurs occidentaux (Villoteau, Lane, Fétis) et orientaux (Maššāqa et al-Jundī). Aussi, sur la période 1902-1904, plusieurs théoriciens égyptiens ont-ils rendu hommage à cet instrument par une actualisation de la théorie modale arabe abbasside, conçue en fonction des doigtés du ‘ūd, et son application au grand ‘ūd égyptien. Ce faisant, ils affirment l’importance de l’instrument dans la théorie, la performance et la transmission. Cette thèse a pour but d’étudier l’évolution de la virtuosité traditionnelle inhérente à la notion médiévale du haḍaq (liée à la perfection artistique) au sein de la tradition musicale arabe, et ce, par le biais de l’analyse de l’évolution des formes jouées, de l’accordage, et des modes de jeu. Cet examen commence par une étude organologique et acoustique des modèles d’instruments employés dans les enregistrements du début de l’ère discographique, en tant que critères externes. Il se poursuit par la segmentation des énoncés enregistrés, à partir de critères internes, liés à la métrique poétique arabe, au mode de jeu et à la configuration du discours musical. Il se termine par une modélisation sémiotique modale de deux extraits et débouche sur une mise en exergue des apports de Qaṣabgī à l’art improvisatif du taqsīm. / The autonomy of Arabic instrumental art and, in particular, the development of improvisational from (taqsīm) on the 'ūd, were concomitant with the advent of 78 rpm recordings in Egypt (1903), as represented by the recordings of Sayyid as-Suwaysī. Yet, the apogee of this art will wait until the 1920s, with the novelties brought to its practice by Muḥammad al-Qaṣabgī, dubbed Sultan of 'Ūd. The emergence of 78 rpm recordings is anticipated by a real musical renaissance, led by genius musicians attached to the court of Ismā‘īl Pasha and his successors. The development of the instrumental counterpart of this school (called the Nahḏa) which is closely related to 'ūd, is linked in particular to the appearance during the last third of the 19th century of a new model of this instrument. The geometric characteristics of this innovative model (size, ratio between length of the vibrating string and the neck length) clearly distinguish it from its predecessor as described by both Western (Villoteau, Lane, Fetis) and Oriental authors (Maššāqa et al-Jundī). Moreover, during the period 1902-1904, several Egyptian theorists expressed explicitly their appreciation of this instrument and presented it as an update of the Abbasid Arab modal theory, conceived according to the ūd's fingering, and its application to the large Egyptian ‘ūd. In so doing, they affirmed the importance of the instrument in theory, performance and education. This thesis aims at studying the evolution of traditional virtuosity related to the medieval notion of haḍaq (linked to artistic perfection) within the Arab musical legacy through the analysis of development of musical forms, tuning, and techniques. This examination begins with an organological and acoustic study of the different models used in the recordings of the early era (1904-1937) as an external criterion. It continues with the segmentation of performed sentences, based on internal criteria, related to Arabic poetic metrics, instrumental technique and the configuration of musical discourse. The study ends with a modal semiotic medialization

Master thesis deals with solutions of BLDC motors (brushless DC motors) control. It analyses microcontrollers and electronic components suitable for BLDC motor controllers under conditions of serial production. It mentions some common problems in practical aplication like dynamic motor braking, synchronization, recuperation and constant revolutions.

Στόχος της παρούσας διπλωματικής εργασίας είναι ο σχεδιασμός και η κατασκευή του ηλεκτρικού κινητηρίου συστήματος ενός ηλεκτροκίνητου σκάφους. Πραγματοποιήθηκαν μία σειρά από τεχνικές επεμβάσεις ώστε να μετατραπεί ένα απλό σκάφος σε ηλεκτροκίνητο. Στην εποχή μας τα ηλεκτροκίνητα σκάφη και η ηλεκτρική πρόωση αποτελούν τμήμα των ηλεκτροκίνητων μέσων μεταφοράς. Τα ηλεκτροκίνητα μέσα μεταφοράς αποτελούν πιθανή λύση στην συνεχώς αυξανόμενη ζήτηση στον τομέα των μεταφορών καθώς και στα ενεργειακά και περιβαλλοντικά προβλήματα που αυτή προκαλεί. Ο υψηλός βαθμός απόδοσης των ηλεκτρικών κινητήρων και των ηλεκτρονικών μετατροπέων ισχύος, το υψηλό επίπεδο ελέγχου μέσω των ηλεκτρονικών μετατροπέων ισχύος που προσφέρει ευκινησία σε ένα σκάφος, η έλλειψη θορύβου-διαταραχών και η απουσία ρύπανσης μας οδηγούν στη χρήση των ηλεκτροκίνητων σκαφών και της ηλεκτρικής πρόωσης όλο και περισσότερο στις μέρες μας. Στη συγκεκριμένη εφαρμογή για πρακτικούς λόγους αλλά και για λόγους ασφάλειας οδηγηθήκαμε στην επιλογή κινητήρα συνεχούς ρεύματος (Σ.Ρ.) μονίμου μαγνήτη χαμηλής τάσης 24V. Αυτό έχει ως αποτέλεσμα υψηλή τιμή ρεύματος για την επίτευξη της απαιτούμενης ισχύος 1,5 kW . Για αυτό το λόγο σχεδιάστηκε και κατασκευάστηκε ο ηλεκτρονικός μετατροπέας υποβιβασμού συνεχούς τάσης σε συνεχή με διαδοχική αγωγή τεσσάρων κλάδων, ο οποίος έχει τη δυνατότητα διαχείρισης υψηλών τιμών ρεύματος και είναι ιδανικός για τέτοιου είδους εφαρμογές. Ο συγκεκριμένος μετατροπέας αποτελείται από 4 παράλληλους κλάδους, λειτουργεί στην συνεχή αγωγή και υποβιβάζει την τάση των 36V σε 0-24V για τον έλεγχο των στροφών του κινητήρα, ο οποίος έχει ονομαστικό ρεύμα 78A. Ο μετατροπέας εξετάστηκε αρχικά μέσω της εξομοίωσης χρησιμοποιώντας το λογισμικό PSpice και στη συνέχεια πειραματικά πραγματοποιώντας μία σειρά από δοκιμές και μετρήσεις. Από τις δοκιμές, παρατηρούμε ότι ο βαθμός απόδοσης του μετατροπέα διαδοχικής αγωγής που κατασκευάστηκε, κυμαίνεται γύρω στο 95%, άρα είναι μια καλή λύση στην οδήγηση κινητήρων συνεχούς ρεύματος (Σ.Ρ.) χαμηλής τάσης (υψηλού ρεύματος). Τέτοιοι κινητήρες χρησιμοποιούνται σε πληθώρα εφαρμογών ηλεκτροκίνητων μέσων μεταφοράς. Η καθέλκυση του ηλεκτροκίνητου σκάφους και οι δοκιμές που πραγματοποιήθηκαν στη θάλασσα, δίνουν σαφή εικόνα των πλεονεκτημάτων της ηλεκτρικής πρόωσης. / The object of this diploma thesis is the designing and the construction of an electric drive system for an electric boat. A number of technical interventions were made to transform a simple boat to an electrically driven boat. In our days the electric boats and the electric propulsion in general constitute a part of the electric transportation. The electric transportation may be a possible solution in the continuously increasing demand in the sector of transports as well as in energy and environmental problems that this causes. The high efficient electric machines and power electronic converters, the high control level of power electronics that offers manoeuvrability in a ship, the lack of noise - disturbance and the absence of pollution lead us to use electric boats and electric propulsion more and more in our days. In our application for practical and safety reasons we were led to the choice of a low voltage permanent magnet direct current (DC) motor. This is resulting to a high value of current to get the nominal power of 1.5 kW. For this reason an interleaved four – channel dc/dc converter was designed and constructed which has the ability to control high currents and is ideal for such type applications. The particular converter is constituted by 4 parallel channels, it is working in the continuous conduction mode (CCM) and it degrades the voltage of 36V to 0-24V for the control of the rpm of the dc propulsion motor which its full load current is 78A. Firstly a number of simulations made via PSpice program and also a number of experiments to see how the converter is working. The experiments shows that the efficiency of the interleaved converter of the application is about 95%, so it is a good solution for driving low voltage – high current dc motors. Such types of electric motors are used in many electric transportation applications. The launching of the boat and a number of sea tests shows us the advantages electric propulsion has.