Les réseaux de capteurs sans fil émergent comme une technologie innovatrice qui peut révolutionner et améliorer notre façon de vivre, de travailler et d'interagir avec l'environnement physique qui nous entoure. Néanmoins, l'utilisation d'une telle technologie soulève de nouveaux défis concernant le développement de systèmes fiables et sécurisés. Ces réseaux de capteurs sans fil sont souvent caractérisés par un déploiement dense et à grande échelle dans des environnements limités en terme de ressources. Les contraintes imposées sont la limitation des capacités de traitement, de stockage et surtout d'énergie car ils sont généralement alimentés par des piles.Nous visons comme objectif principal à travers cette thèse à proposer des solutions permettant de garantir un certain niveau de fiabilité dans un RCSF dédié aux applications sensibles. Nous avons ainsi abordé trois axes, qui sont :- Le développement de méthodes permettant de détecter les noeuds capteurs défaillants dans un RCSF,- Le développement de méthodes permettant de détecter les anomalies dans les mesures collectées par les nœuds capteurs, et par la suite, les capteurs usés (fournissant de fausses mesures).- Le développement de méthodes permettant d'assurer l'intégrité et l'authenticité des données transmise dans un RCSF. / Wireless sensor networks emerge as an innovative technology that can revolutionize and improve our way to live, work and interact with the physical environment around us. Nevertheless, the use of such technology raises new challenges in the development of reliable and secure systems. These wireless sensor networks are often characterized by dense deployment on a large scale in resource-onstrained environments. The constraints imposed are the limitation of the processing, storage and especially energy capacities since they are generally powered by batteries.Our main objective is to propose solutions that guarantee a certain level of reliability in a WSN dedicated to sensitive applications. We have thus proposed three axes, which are:- The development of methods for detecting failed sensor nodes in a WSN.- The development of methods for detecting anomalies in measurements collected by sensor nodes, and subsequently fault sensors (providing false measurements).- The development of methods ensuring the integrity and authenticity of transmitted data over a WSN.

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This study explored the influence of irrational beliefs on adolescent secondary school learners’ Mathematics achievement in Zimbabwe. Learner, home and school factors which influence secondary school learners’ Mathematics achievement were discussed and relevant studies were scrutinised. The theoretical views of Albert Ellis regarding the characteristics, effects, acquisition and maintenance of irrational beliefs were discussed together with the major irrational beliefs and their possible relationship with learners’ Mathematics achievement. A sample of 306 randomly selected adolescent Mathematics learners comprising 182 girls and 124 boys in the 14 to 18 year age range participated in the study. A composite questionnaire with subscales on learners’ irrational beliefs, socio-affective variables and perceptions was used during the empirical investigation. Six major hypotheses were tested. The study established that learners’ irrational thoughts about Mathematics correlate negatively with their Mathematics achievement. Learners’ irrational thoughts about Mathematics correlated negatively with motivation, self-concept, parental involvement, and teacher-learner relationships and positively with stress, anxiety and faulty perceptions. Regression analysis proved that learners’ irrational beliefs, socio-affective variables and perceptions jointly explain a greater proportion of the variance in Mathematics achievement than any one of these factors on its own. Therefore, learners’ Mathematics achievement is affected by irrational beliefs together with their socio-affective variables and perceptions. Practical recommendations were given to Mathematics education stakeholders such as teachers, school counsellors, parents and learners to minimise poor Mathematics achievement attributable to irrational beliefs and the allied variables explored in this study. / Psychology of Education / D. Ed. (Psychology of Education)

本研究旨在探討僕人領導、組織信任與工作滿意之間的關係，並以組織信任為中介變項，檢驗組織信任在僕人領導對工作滿意關係上的影響與效果。本研究將組織信任分為同事信任與領導信任兩個層面，採用Barbuto和Wheeler所發展出的僕人領導問卷、改編自Jorde-Bloom的幼兒教師工作滿意調查問卷以及自編的組織信任問卷為研究工具，對台北市公私立幼稚園教師進行問卷調查，共發出608份問卷，有效問卷共256份，有效問卷回收率為42.1％。本研究採用結構方程模式（SEM）驗證僕人領導、組織信任與工作滿意之間的影響與效果，並根據研究結果獲得以下結論，最後提出建議作為後續研究及幼教政策與行政實務之參考。 一、僕人領導對同事信任、領導信任與工作滿意皆有顯著的正向影響。 二、組織信任的兩個研究層面中，同事信任對工作滿意有正向的顯著影響關係，領導信任對工作滿意也有正向的影響。 三、組織信任在僕人領導對工作滿意的中介影響關係上顯示：同事信任在僕人領導對工作滿意的影響上有顯著的中介效果；領導信任在僕人領導對工作滿意的影響上也有顯著的中介效果。 四、將同事信任與領導信任為中介變項的結構模式分析結果兩相比較後發現：（一）僕人領導對領導信任的影響高於對同事信任的影響；（二）領導信任在僕人領導對工作滿意影響路徑上的中介效果高於同事信任的中介效果。研究證實領導信任是僕人領導對工作滿意發揮影響的關鍵。 / This research aims to explore the relationship among servant leadership, organizational trust and job satisfaction. Organization trust was hypothesized as a mediator between servant leadership and job satisfaction. Two dimensions of organization trust were examined: faculty trust and leader trust. Survey data were collected from 256 kindergarten teachers and analyzed by using structural equation modeling (SEM) methods. The findings of the study revealed that: (1) servant leadership positively influenced faculty trust, leader trust and job satisfaction; (2) the influence of organizational trust on job satisfaction implied that both faculty trust and leader trust have a positive influence on job satisfaction; (3) both faculty trust and leader trust significantly influenced the mediating effect of servant leadership on job satisfaction; (4) the impact of servant leader on leader trust was higher than that on faculty trust, and leader trust had higher mediating effect than faculty trust. The result indicated that leader trust acted as a significant mediator between servant leadership and job satisfaction. Managerial implications and some suggestions for future research were provided at the end of this thesis.

<p>Osnovna svojstva telefonske mreţe, koja opisuju njen kvalitet, su kvalitet prenetog govornog signala i kvalitet u uspostavljanju telefonske veze. Na kvalitet uspostavljanja veze utiĉu mogućnost i brzina uspostavljanja veze. Brzina uspostavljanja veze se izraţava vremenima za koje se obave odreĊene aktivnosti u pojedinim fazama uspo-stavljanja veze. Trajanje ovih faza je propisano normama, koje su odreĊene meĊunarodnim propisima i date su u publikovanim preporukama. Osnovni ĉinilac brzine uspo-stavljanja veze je vreme odziva pozvane strane. Ovaj parametar se defini&scaron;e kao vremenski interval od slanja poslednjeg adresnog parametra traţenog korisnika od strane pozivajućeg korisnika, do poĉetka odgovora mreţe. U disertaciji je izvr&scaron;ena analiza vremena odziva pozvane strane u telefonskim mreţama i njegovih svojstava. Usled razlika u preno&scaron;enju adresnih informacija u klasiĉnim i savremenim paketskim mreţama, uslovi koji se odnose na vreme odgovora pozvane strane nisu isti. Ovaj zakljuĉak je formulisan u predlogu za izmenu postojećih normi koje se odnose na savremene mreţe. U nastavku je opisana mogućnost kori&scaron;ćenja vremena odziva pozvane strane u me&scaron;ovitoj mreţi kao &scaron;to je elektroprivredna telefonska mreţa, u cilju dono&scaron;enja zakljuĉka o radu mreţe. U takvoj me&scaron;ovitoj mreţi, razliĉite signalizacije i razliĉito trajanje vremena odziva pozvane strane mogu se iskoristiti za nadgledanje ispravnosti pojedinih delova mreţe odnosno detekciju neispravnih veza u njoj. Koristeći ovu osobinu, predloţen je detektor predalarmnog stanja tj. neispravnih veza u me&scaron;ovitoj telefonskoj mreţi Elektroprivrede Srbije.</p> / <p>Main features of telephone network which describe its service quality are the quality of speech signal and the quality of connection setup. The quality of connection setup is affected by the ability and the speed of connection setup. The speed of connection setup is expressed by the time needed for executing of some connection setup phases. Duration of these phases is prescribed by recommended target values, determined in international recommendations. The key indicator of connection set-up speed is post selection delay. This parameter is defined as the time interval from the moment when the complete address information about the called subscriber is sent from the calling subscriber to the network, till the moment when the answer is received from the network. The analysis of post selection delay in telephone networks and its characteristics is performed in the dissertation. Due to differences in transmission of adress information in classic and modern telephone networks, conditions dealing with the post selection delay are not same. This conclusion is formulated in the proposition for changing existing target values related to modern packet networks. In addition, the possibility of using post selection delay in mixed network, such as the telephone network of electric power utility, for monitoring the network operation is described. In such mixed network, different signaling systems i.e. different durations of post selection delay can be used for checking of proper operation of the network parts and detection of faulty connections. Applying this feature, the pre-alarm state detector is proposed.</p>

This diploma thesis focuses on two conditions that typically occure in childhood - poor posture and developmental coordination disorder. The theoretical part summarizes recent information on these diseases focusing on their etiology, prevalence, prognosis, methods of assessment, diagnosis and treatment. The main aim of the practical part was to evaluate the motor control of treated children with poor posture in comparison with children from the general population. The research group (13 children, mean age 9.85 years) and control group (16 children, mean age 9.94 years) were assessed using Movement Assessment Battery for Children 2. We found no significant difference between motor skills of treated children with poor posture and motor skills of children representing the general population. We also analysed whether treated children with poor posture reported less physical activity compared with the general population. By gathering data from questionnaires (completed by parents of tested children), no statistically significant difference was found. The difference was neither detected in test of posture and postural functions, where we investigated how poor posture of treated children can influence the results of the test. Powered by TCPDF (www.tcpdf.org)

Title Outdoor excercising - muscle imbalance reduction instrument Summary This thesis main topic is pre-school children muscle imbalance problems. Theoretical part deals with importace of execercising for pre-school children and postural functions together with respiratory systems using the Matthias test are pointed out in theoretical part. Next part deals with a mapping of possible physical activities which can help to eliminate muscle imbalances. The main topic of practical part is children appliance physical system and bellows vital capacity analysis. In next part is evaluated muscle imbalances caused by outdoor games and activities and children respiratory system. Then is mentioned influence of outdoor exercising regarding to indoor activites in nursery schools. There is also mentioned possible influence of outdoor activities outside of nursery schools on pre-school childern optimal posture. The main goal of this thesis is to find out if movement activities and outdoor excercising influence posture positively and prevent muscle imbalance of pre-school childern. Key words Muscle imbalance, pre-school, correct and faulty posture, Matthias test, outdoor exercising, indoor activities in nursery school.

This study explored the influence of irrational beliefs on adolescent secondary school learners’ Mathematics achievement in Zimbabwe. Learner, home and school factors which influence secondary school learners’ Mathematics achievement were discussed and relevant studies were scrutinised. The theoretical views of Albert Ellis regarding the characteristics, effects, acquisition and maintenance of irrational beliefs were discussed together with the major irrational beliefs and their possible relationship with learners’ Mathematics achievement. A sample of 306 randomly selected adolescent Mathematics learners comprising 182 girls and 124 boys in the 14 to 18 year age range participated in the study. A composite questionnaire with subscales on learners’ irrational beliefs, socio-affective variables and perceptions was used during the empirical investigation. Six major hypotheses were tested. The study established that learners’ irrational thoughts about Mathematics correlate negatively with their Mathematics achievement. Learners’ irrational thoughts about Mathematics correlated negatively with motivation, self-concept, parental involvement, and teacher-learner relationships and positively with stress, anxiety and faulty perceptions. Regression analysis proved that learners’ irrational beliefs, socio-affective variables and perceptions jointly explain a greater proportion of the variance in Mathematics achievement than any one of these factors on its own. Therefore, learners’ Mathematics achievement is affected by irrational beliefs together with their socio-affective variables and perceptions. Practical recommendations were given to Mathematics education stakeholders such as teachers, school counsellors, parents and learners to minimise poor Mathematics achievement attributable to irrational beliefs and the allied variables explored in this study. / Psychology of Education / D. Ed. (Psychology of Education)

The thesis shows the historical development of the South Moravian electricity system and the development of Brno´s network is discussed in more detail, especially the current form of the network from the outskirts of the city to its historical centre. The lattice network, as a subject of the analysis, is described in terms of the operation and reliability of the power supply. It also informs about the gradual development of the technology applied in the lattice network Brno-střed. The practical part performs the analysis of theoretical data and recorded data with respect to steady-state and faulty-state operation of the lattice network Brno-střed. The theoretical analysis is based on the simulation and calculation of the lattice network model in the software PAS DAISY Bizon and the monitored parameter is the transformers power load. In addition, the analysis of the real data includes the assessment of the difference average phase current values, as well as voltage, between the transformer phases. There is also the evaluation of the energy flow from the low voltage side to the high voltage side of the analysed network.

Je jasné, že nejúspěšnější konstrukce zahrnuje postup vícefázového řízení, ve kterém každá fáze může být považována za samostatný modul. Provoz kterékoliv z jednotek musí mít minimální vliv na ostatní, a to tak, že v případě selhání jedné jednotky ostatní mohou být v provozu neovlivněny. Modulární řešení vyžaduje minimální elektrické, magnetické a tepelné ovlivnění mezi fázemi řízení (měniče). Synchronní stroje s pulzním tokem a permanentními magnety se jeví jako atraktivní typ stroje, jejíž přednostmi jsou vysoký kroutící moment, jednoduchá a robustní konstrukce rotoru a skutečnost, že permanentní magnety i cívky jsou umístěny společně na statoru. FS-PMSM jsou poměrně nové typy střídavého stroje stator-permanentní magnet, které představují významné přednosti na rozdíl od konvenčních rotorů - velký kroutící moment, vysoký točivý moment, v podstatě sinusové zpětné EMF křivky, zároveň kompaktní a robustní konstrukce díky umístění magnetů a vinutí kotvy na statoru. Srovnání výsledků mezi FS-PMSM a klasickými motory na povrchu upevněnými PM (SPM) se stejnými parametry ukazuje, že FS-PMSM vykazuje větší vzduchové mezery hustoty toku, vyšší točivý moment na ztráty v mědi, ale také vyšší pulzaci díky reluktančnímu momentu. Pro stroje buzené permanentními magnety se jedná o tradiční rozpor mezi požadavkem na vysoký kroutící moment pod základní rychlostí (oblast konstantního momentu) a provozem nad základní rychlostí (oblast konstantního výkonu), zejména pro aplikace v hybridních vozidlech. Je předložena nová topologie synchronního stroje s permanentními magnety a spínaným tokem odolného proti poruchám, která je schopná provozu během vinutí naprázdno a zkratovaného vinutí i poruchách měniče. Schéma je založeno na dvojitě vinutém motoru napájeném ze dvou oddělených vektorově řízených napěťových zdrojů. Vinutí jsou uspořádána takovým způsobem, aby tvořila dvě nezávislé a oddělené sady. Simulace a experimentální výzkum zpřesní výkon během obou scénářů jak za normálního provozu, tak za poruch včetně zkratových závad a ukáží robustnost pohonu za těchto podmínek. Tato práce byla publikována v deseti konferenčních příspěvcích, dvou časopisech a knižní kapitole, kde byly představeny jak topologie pohonu a aplikovaná řídící schémata, tak analýzy jeho schopnosti odolávat poruchám.