Global ETD Search

201	國族的肚臍：一項關於國族建構的哲學性闡釋李國維 Unknown Date (has links) 國族是什麼？國族主義又是什麼？面對許許多多歧異又紛雜的關於國族與國族主義的論述，本論文嘗試另闢蹊徑，從哲學層面來闡釋這一問題。本文區分國族之形成的主觀條件與客觀條件，認為國族不同於國家與民族，不能單純以客觀條件作為依據，而是必須以主觀條件作為依據。本文又進一步區分形式條件與實質條件，認為主觀條件中必須同時包括形式條件與實質條件，也就是說，一群人若要組成一個國族共同體，這些人必須是出於各自之自由意志，決定共同組成一個不同於其他之團體的共同體，而且要尋找並形成某種歸屬核心，當做共同體之根本質素，使之成為維繫共同體之長久存續的道德基礎。本文以羅爾斯的政治自由主義與民族觀點作為論述根基，由此開展一種新的國族觀點，一種特殊的、只在自由主義式的民主政治體制中存在的政治共同體。並認為，人類理性必然要求人類朝這樣的政治共同體邁進，使每個人的自由都夠有最合理的、最和諧的發展，而不致釀成戰爭衝突。 / What is “nation”? And what is “nationalism”? There are many diverse and conflicting theories about nations and nationalism. We look into these theories and then abandon them because there are too many definitions. We believe that the nation is a special and unique political community and it accrues only in the liberal constitutional democracy of the modern period. There are two kinds of conditions for the construction of a nation: the subjective condition and the objective conditions. The former is an inner characteristic, while the later are external features. Unlike a state or a people, a nation must be founded the subjective condition as much as the objective conditions. In other words, the subjective condition, human beings’ free will, is the essential bedrock for the construction of a nation. In this perspective, we further distinguish the formal condition from the substantive condition. The formal condition has no content; its only function is pure decision-making. If a group of people is willing to associate together and form a community, it’s necessary for them not only to make a decision but also to decide what community they want to be. Furthermore, they have to search for and fashion their own defining core as the underlying element of the community as well as the moral foundation for the continuance of the community. Based on John Rawls’ political liberalism and his views about peoples, this paper evolves a new viewpoint of the nation as a unique political community that exists only in the liberal democracy. We also assume it is required by human reason that mankind should move forward to such a political community, enabling everyone to develop his or her liberty in the most reasonable and harmonious way without leading to wars and conflicts. 羅爾斯康德施密特國族國族主義政治共同體公共理性交疊性共識盧梭法國大革命肚臍主觀條件客觀條件正義原則 John Rawls Immanuel Kant Carl Schmitt the principles of justice nation nationalism political community public reason overlapping consensus Jean-Jacques Rousseau the French Revolution navel subjective condition objective condition
202	The management of parent involvement at selected secondary schools in the Zeerust District, North West Province Charamba, Madirayi 12 1900 (has links) This research focuses on the issue of parent involvement at selected secondary schools in the Zeerust District of the North West Province in order to gain an understanding of relevant participants’ views on the following aspects that relate to the management of parent involvement: the concept of parent involvement, ways in which parent involvement should be realised, its benefits and challenges, as well as strategies to improve the management of parent involvement in the education of learner children. The theoretical frameworks that informed this study were Epstein’s theories of overlapping spheres and her typology of parent involvement, as well as Bronfenbrenner’s ecological model. These frameworks provided a meaningful lens for interpreting data and making recommendations in the final chapter. The researcher undertook an extensive literature study and conducted interviews with principals, SGB chairpersons, as well as selected SGB parent members and other active and inactive parents from the selected schools in the Zeerust district. The research shows, inter alia, that parent involvement has various benefits and that it faces several challenges which affect the management thereof. Benefits concern improvement in terms of academic performance of learners, provision of teaching and learning resources, relationships between parents and the school, learner motivation and school attendance. Challenges to parent involvement that were identified were time constraints of parents, poor communication between home and school, parents’ lack of interest and commitment, principals’ limitations in terms of the management of parent involvement, parents’ limited education, negative parental attitudes and negative teacher attitudes. Key recommendations were made in terms of Bronfenbrenner’s micro, exo- and macrosystem for addressing the management of parent involvement in a synergetic manner. They concerned, inter alia, the national Department of Basic Education in the macrosystem, provincial Departments of Basic Education in the exosystem and schools and parents in the microsystem. / Educational Leadership and Management / M. Ed. (Education Management) Parent involvement Epstein’s overlapping spheres Epstein’s typology of parents Bronfenbrenner’s ecological model Importance of parent involvement Challenges to parent involvement Strategies for parent involvement Benefits of parent involvement South African Schools Act School Governing Bodies Education management 373.11920968247 High schools -- South Africa -- Zeerust
203	Určení pozice kamery v reálném čase pro rozšířenou realitou / Real-time camera pose estimation for augmented reality Szentandrási, István Unknown Date (has links) Definované markery tvoří základ určování polohy kamery pro velké množství aplikací s rozšířenou realitou, v případě že jsou přísné požadavky na rychlost a robustnost. Tato práce popisuje účinnou metodu pro určení pózy kamery pomocí Uniformního pole markerů a několik realistických aplikací na bázi popsané metody. Metoda je velice výpočetně levná a poskytuje spolehlivou detekci pro několik výpočetních platforem, včetně běžných chytrých telefonů. Markery jako část zobrazené informace na monitorech jsou použité v této práci pro určení relativní orientaci mezi poskytovatelem obsahu a užívatelským zařízením, sloužícím pro výběr prvků užívatelského rozhraní při interakci a migraci úkolů. Ve filmařském průmyslu poskytuje popsaná metoda pro zjištění polohy kamery jako součást klíčovaní pozadí filmářům živý náhled virtuální scény. Výsledky ukazují, že popsaná metoda pro detekci pole markerů má srovnatelnou úspěšnost a přesnost v porovnání s ostatními metodami na bázi markerů a je několikrát rýchlejší. Aplikace zahrnuté v této práci podle výsledků testů jsou životaschopné - rychlejší a levnější - alternativy k existujícím řešením.
204	Etude de techniques de calculs multi-domaines appliqués à la compatibilité électromagnétique / Study of multi-domain computation techniques applied to electromagnetic compatibility Patier, Laurent 17 November 2010 (has links) Le contexte d’étude est celui de la Compatibilité ÉlectroMagnétique (CEM). L’objectif de la CEM est, comme son nom l’indique, d’assurer la compatibilité entre une source de perturbation électromagnétique et un système électronique victime. Or, la prédiction de ces niveaux de perturbation ne peut pas s’effectuer à l’aide d’un simple calcul analytique, en raison de la géométrie qui est généralement complexe pour le système que l’on étudie, tel que le champ à l’intérieur d’un cockpit d’avion par exemple. En conséquence, nous sommes contraints d’employer des méthodes numériques, dans le but de prédire ce niveau de couplage entre les sources et les victimes. Parmi les nombreuses méthodes numériques existantes à ce jour, les méthodes Multi-Domaines (MD) sont très prisées. En effet, elles offrent la liberté aux utilisateurs de choisir la méthode numérique la plus adaptée, en fonction de la zone géométrique à calculer. Au sein de ces méthodes MD, la « Domain Decomposition Method » (DDM) présente l’avantage supplémentaire de découpler chacun de ces domaines. En conséquence, la DDM est particulièrement intéressante, vis-à-vis des méthodes concurrentes, en particulier sur l’aspect du coût numérique. Pour preuve, l’ONERA continue de développer cette méthode qui ne cesse de montrer son efficacité depuis plusieurs années, notamment pour le domaine des Surfaces Équivalentes Radar (SER) et des antennes. L’objectif de l’étude est de tirer profit des avantages de cette méthode pour des problématiques de CEM. Jusqu’à maintenant, de nombreuses applications de CEM, traitées par le code DDM, fournissaient des résultats fortement bruités. Même pour des problématiques électromagnétiques très simples, des problèmes subsistaient, sans explication convaincante. Ceci justifie cette étude. Le but de cette thèse est de pouvoir appliquer ce formalisme DDM à des problématiques de CEM. Dans cette optique, nous avons été amenés à redéfinir un certain nombre de conventions, qui interviennent au sein de la DDM. Par ailleurs, nous avons développé un modèle spécifique pour les ouvertures, qui sont des voies de couplage privilégiées par les ondes, à l’intérieur des cavités que représentent les blindages. Comme les ouvertures sont, en pratique, de petites dimensions devant la longueur d’onde, on s’est intéressé à un modèle quasi-statique. Nous proposons alors un modèle, qui a été implémenté, puis validé. Suite à ce modèle, nous avons développé une méthode originale, basée sur un calcul en deux étapes, permettant de ne plus discrétiser le support des ouvertures dans les calculs 3D. / The context of the study is the ElectroMagnetic Compatibility (EMC). Principal aim of the EMC is to ensure the compatibility between an electromagnetic perturbance source and an electronic device victim. Unfortunately, the perturbation levels prediction can not be made using an analytic formula, because the geometry which is generally complex for the interesting system, for example the field inside an aircraft’s cockpit. Therefore, we are contrained to use numerical methods, to be able to evaluate this coupling level between sources and victims. Among several existing numerical methods, Multi-Domains (MD) methods are very interesting. They offer to users the freedom to choose the most powerfull numerical method, in terms of the geometrical zone evaluated. With the MD methods, « Domain Decomposition Method » (DDM) has the avantage of decouplingeach of theses areas. Therefore, DDM is very interesting, compared to other methods, in particular on the numerical cost. ONERA keeps on developing this method, which has not stop showing his efficiency since several years, in particular in Radar Cross Section (RCS) and antennas. The objective of this study is to take the benefits of this method for EMC problems. Up to now, several EMC applications treated by the DDM code provided results strongly noisy. Even for with very simple electromagnetic cases, some problems remained without convincing explanations. This justifies this study. The aim of this thesis is to can be able to apply DDM formalism to EMC problems. Then, we have been induced to redefine a number of conventions which are involved in the DDM. Otherwise, we have developed a specific model for the apertures which are privilegied tracts of the coupling by the penetration of waves inside cavities (shieldings). As the apertures have in practice smaller dimensions compared to the wavelength, we have been interested to a quasistatic model which was developped, implemented and validated. Following this model, we have developed an original method, based on a two step calculation, able to do not discretize the apertures support in 3D computations. Électromagnétisme / ondes Compatibilité électromagnétique (CEM) Efficacité de Blindage Cavités Ouvertures non-discrétisées Modèles de fentes / trous Méthode par Décomposition de Domaines Principe d’Équivalence / Huygens Electromagnetism / Waves ElectroMagnetic Compatibility (EMC) Shielding Efficiency (SE) / Cavities Overlapping Methods Enclosure / Hole / Slot Quasi-static Models / Small Apertures Domain Decomposition Method (DDM) Equivalence / Huygens Principle Induction Theorem / Diffraction Theory Analog / Digital / Power Electronics
205	School management strategies to improve parental involvement : insights from school principals in Southern Tshwane primary schools Van Diermen, Elthea 05 1900 (has links) Parental involvement plays a very important role in the development of a child’s formal education. This study explored various management strategies that might serve as guidelines to improve parental involvement in primary schools. The conceptual framework that informed this study was factors that determine school effectiveness as well as Epstein’s theory of overlapping spheres and her typology on parental involvement that served as the theoretical framework. A qualitative research approach was used for this study, as it allowed the researcher to conduct in-depth interviews with six principals in Southern Tshwane primary schools and examined relevant documents to collect data. The research indicates that most schools comprehend the importance of parental involvement, yet lack structured implementation frameworks for parental involvement. The study recommends that schools need to plan, manage and implement a parental involvement programme according to the unique circumstances of the school. / Ukubandakanyeka kwabazali kudlala indima ebalulekile kakhulu ekuthuthukiseni imfundo esemthethweni yengane. Lolucwaningo luhlola amasu ahlukahlukene okuphatha angase asebenze njengemihlahlandlela yokuthuthukisa ukubandakanyeka kwabazali ezikoleni zamabanga aphansi ase Ningizimu neTshwane. Umhlahlandlela womqondo owazisa lolucwaningo yizici ezenza ukusebenza kahle ezikoleni kanye nenkolelo ka-Epstein yezinhlaka eziqhamukayo ekubandakanyeni kwabazali okwakungumhlahlandlela wemfundo. Indlela yokucwaninga eyasetshenziswa kulolucwaningo yenza ukuthi umcwaningi aqhube izingxoxo ezijulile nothishanhloko abayisithupha bezikole zamabanga aphansi ase Ningizimu neTshwane, futhi wahlola nemibhalo efanele ukuqoqa imininingwane. Ucwaningo lubonisa ukuthi izikole eziningi zinalo ulwazi lokubaluleka kokubandakanya abazali kodwa azinazo izinhlaka ezihlelekile zokwenza ukuthi abazali babandakanyeke. Ucwaningo lukhuthaza ukuthi izikole zidinga ukuhlela, ukuphatha nokusebenzisa uhlelo lokubandakanya abazali ngokuvumelana nezimo ezihlukile zesikole. / U dzhenelela ha vhabebi ndi tshipida tsha ndeme tsha u aluwa ha pfunzo ya vhana. Tsedzuluso ino yo sedzulusa ndila dzo fhambanaho dza u langula dzine dza shumisiwa sa nyeletshedzo dza u khwinisa u dzhenelela ha vhabebi kha zwikolo zwa fhundzo dza fhasi Tshitirikini tsha Tshipembe ha Tshwane. Tsedzuluso ino yo di sendeka nga zwithu zwine zwa bveledza tshumelo ya maimo a ntha a zwikolo na pfunzo khulwane ya Epstein ya masia a no shumisana kha u dzhenelela ha vhabebi zwine zwa shumisiwa sa maga a kuhumbulele. Tsedzuluso ino yo shumisa maitele a u sedzulusa a qualitative, ngauri a tendela musedzulusi u vhudzisa mbudziso dzo dzudzanywaho na thoho dza tshikolo dza rathi dza zwikolo zwa fhasi Tshitirikini tsha Tshipembe ha Tshwane, na u sedzulusa manwalo o no yelana na tsedzuluso ino kuvhanganya ndivho. Tsedzuluso i sumbedza uri vhunzhi ha zwikolo zwi dzhiela nzhele u dzhenelela ha vhabebi, fhedzi a zwina maitele o dzudzanywaho a u eletshedza u dzhenelela avhabebi. Tsedzuluso ino i themendela uri zwikolo zwi tea u dzudzanya, u langula na u shumisa maitele o themendelwaho a u katela u dzhenelela ha vhabebi uya nga u fhambana-fhambana ha nyimele dza zwikolo. / Educational Management and Leadership / M. Ed. (Education Management) Barriers to parental involvement Benefits of parental involvement Educational development Hornby and Lafaele’s model Management strategies Parental involvement School effectiveness School management 372.11920968227
206	Nonlinear Dynamic Modeling, Simulation And Characterization Of The Mesoscale Neuron-electrode Interface Thakore, Vaibhav 01 January 2012 (has links) Extracellular neuroelectronic interfacing has important applications in the fields of neural prosthetics, biological computation and whole-cell biosensing for drug screening and toxin detection. While the field of neuroelectronic interfacing holds great promise, the recording of high-fidelity signals from extracellular devices has long suffered from the problem of low signal-to-noise ratios and changes in signal shapes due to the presence of highly dispersive dielectric medium in the neuron-microelectrode cleft. This has made it difficult to correlate the extracellularly recorded signals with the intracellular signals recorded using conventional patch-clamp electrophysiology. For bringing about an improvement in the signalto-noise ratio of the signals recorded on the extracellular microelectrodes and to explore strategies for engineering the neuron-electrode interface there exists a need to model, simulate and characterize the cell-sensor interface to better understand the mechanism of signal transduction across the interface. Efforts to date for modeling the neuron-electrode interface have primarily focused on the use of point or area contact linear equivalent circuit models for a description of the interface with an assumption of passive linearity for the dynamics of the interfacial medium in the cell-electrode cleft. In this dissertation, results are presented from a nonlinear dynamic characterization of the neuroelectronic junction based on Volterra-Wiener modeling which showed that the process of signal transduction at the interface may have nonlinear contributions from the interfacial medium. An optimization based study of linear equivalent circuit models for representing signals recorded at the neuron-electrode interface subsequently iv proved conclusively that the process of signal transduction across the interface is indeed nonlinear. Following this a theoretical framework for the extraction of the complex nonlinear material parameters of the interfacial medium like the dielectric permittivity, conductivity and diffusivity tensors based on dynamic nonlinear Volterra-Wiener modeling was developed. Within this framework, the use of Gaussian bandlimited white noise for nonlinear impedance spectroscopy was shown to offer considerable advantages over the use of sinusoidal inputs for nonlinear harmonic analysis currently employed in impedance characterization of nonlinear electrochemical systems. Signal transduction at the neuron-microelectrode interface is mediated by the interfacial medium confined to a thin cleft with thickness on the scale of 20-110 nm giving rise to Knudsen numbers (ratio of mean free path to characteristic system length) in the range of 0.015 and 0.003 for ionic electrodiffusion. At these Knudsen numbers, the continuum assumptions made in the use of Poisson-Nernst-Planck system of equations for modeling ionic electrodiffusion are not valid. Therefore, a lattice Boltzmann method (LBM) based multiphysics solver suitable for modeling ionic electrodiffusion at the mesoscale neuron-microelectrode interface was developed. Additionally, a molecular speed dependent relaxation time was proposed for use in the lattice Boltzmann equation. Such a relaxation time holds promise for enhancing the numerical stability of lattice Boltzmann algorithms as it helped recover a physically correct description of microscopic phenomena related to particle collisions governed by their local density on the lattice. Next, using this multiphysics solver simulations were carried out for the charge relaxation dynamics of an electrolytic nanocapacitor with the intention of ultimately employing it for a simulation of the capacitive coupling between the neuron and the v planar microelectrode on a microelectrode array (MEA). Simulations of the charge relaxation dynamics for a step potential applied at t = 0 to the capacitor electrodes were carried out for varying conditions of electric double layer (EDL) overlap, solvent viscosity, electrode spacing and ratio of cation to anion diffusivity. For a large EDL overlap, an anomalous plasma-like collective behavior of oscillating ions at a frequency much lower than the plasma frequency of the electrolyte was observed and as such it appears to be purely an effect of nanoscale confinement. Results from these simulations are then discussed in the context of the dynamics of the interfacial medium in the neuron-microelectrode cleft. In conclusion, a synergistic approach to engineering the neuron-microelectrode interface is outlined through a use of the nonlinear dynamic modeling, simulation and characterization tools developed as part of this dissertation research. Whole cell biosensors cell sensor interface neuron electrode interface neuroelectronic interfacing microelectrode arrays meas field effect transistor (fet) arrays limitations of equivalent circuit models volterra wiener modeling nonlinear dynamic modeling nonlinear impedance spectroscopy lattice boltzmann method lattice poisson boltzmann method multiphysics solver entrance flow problem surface chemical reaction electroosmotic flow ionic electrodiffusion primitive model of electrolyte charge relaxation dynamics electrolytic nanocapacitor effect of nanoscale confinement overlapping electric double layers electric double layer relaxation viscous drag force on ions in a solvent Physics
207	Evaluation of Target Tracking Using Multiple Sensors and Non-Causal Algorithms Vestin, Albin, Strandberg, Gustav January 2019 (has links) Today, the main research field for the automotive industry is to find solutions for active safety. In order to perceive the surrounding environment, tracking nearby traffic objects plays an important role. Validation of the tracking performance is often done in staged traffic scenarios, where additional sensors, mounted on the vehicles, are used to obtain their true positions and velocities. The difficulty of evaluating the tracking performance complicates its development. An alternative approach studied in this thesis, is to record sequences and use non-causal algorithms, such as smoothing, instead of filtering to estimate the true target states. With this method, validation data for online, causal, target tracking algorithms can be obtained for all traffic scenarios without the need of extra sensors. We investigate how non-causal algorithms affects the target tracking performance using multiple sensors and dynamic models of different complexity. This is done to evaluate real-time methods against estimates obtained from non-causal filtering. Two different measurement units, a monocular camera and a LIDAR sensor, and two dynamic models are evaluated and compared using both causal and non-causal methods. The system is tested in two single object scenarios where ground truth is available and in three multi object scenarios without ground truth. Results from the two single object scenarios shows that tracking using only a monocular camera performs poorly since it is unable to measure the distance to objects. Here, a complementary LIDAR sensor improves the tracking performance significantly. The dynamic models are shown to have a small impact on the tracking performance, while the non-causal application gives a distinct improvement when tracking objects at large distances. Since the sequence can be reversed, the non-causal estimates are propagated from more certain states when the target is closer to the ego vehicle. For multiple object tracking, we find that correct associations between measurements and tracks are crucial for improving the tracking performance with non-causal algorithms. evaluation target tracking multiple sensors non-causal smoother smoothing tracking vehicle tracking camera lidar estimate estimation prediction vehicle dynamics sensor fusion real-time tracking extended kalman filter filter validation validation position estimation velocity estimation dynamic model model complexity multi object tracking multiple object tracking single object tracking data association tracking fundamentals iterated kalman filter track management gnn global nearest neighbour mahalanobis mahalanobis distance performance evaluation differential gps dgps roi ego several sensors sensors rmse root mean square error invertible motion anti-causal motion anti-causal tracking constant velocity gnn imu tfs two filter smoother ekf rts radar inertial measurement unit nonlinear nonlinear systems mono camera monocular camera noise model tracking performance fixed interval smoothing m/n logic centralized fusion non-causal object tracker car tracking car dynamics automotive active safety object tracking automotive industry thesis master reverse dynamics reverse tracking reverse sequence sequence tracking data propagation ground truth estimating ground truth additional sensors mounted sensors true estimates environment comparison algorithm independent targets overlapping measurements occluded track switch improve lower uncertainty more certain state process noise covariance sampling image sprt adas cnn cv pdf track target ego tracker tentative track observatiom online tracking offline tracking online offline recorded sequences robust self driving self-driving car traffic trajectory true state scenario scenarios future accurate output advanced driver assistance systems non-linear complex noise pedestrian truck bus maneuvering vehicles processed measurement frame state correction probability density function tuning likelihood transition measurement motion model recursion gaussian approximation distribution linear jacobian multiplicative noise ratio ad hoc ad hoc state space approach backward auction euclidean distance statistical threshold gating association margin normalize covariance matrix fusion confirmed rejected tentative history absolute error modular ego motion parameters variables logg hardware specification fused causal factorization independent uncorrelated transform moving rotation translation oncoming overtaking Control Engineering Reglerteknik

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