Dissertations / Theses on the topic 'Serial position'

Thesis (Ph.D.)--Kent State University, 2009.
Title from PDF t.p. (viewed Jan. 26, 2010). Advisor: Jocelyn R. Folk. Keywords: spelling; orthography; serial position. Includes bibliographical references (p. 53-60)

Mycket av vår kognitiva förmåga beror på lagringen och bearbetande av meningen olika objekt, ord eller handlingar innefattar. Denna mening kallas för semantik där semantik inom arbetsminne har till största del ignorerats och istället tillskrivits långtids semantiskt minne. Med användning Baddley och Hitch model av arbetsminne är målet av denna studie att tillskriva semantisk bearbetning till en komponent inom modellen, undersöka skillnader mellan typer av semantiskt material till episodiskt material och hur dessa är påverkade av seriella positionseffekter. Relaterad semantik, orelaterad semantik och episodiskt material var inkluderade i studien och var representerade av ord-par. 42 deltagare, med användningen av en bekvämlighetsurvalsmetod, blev slumpmässigt tilldelade ett av tre experimentella förhållanden designade för att förändra mängden material som de kan memorera. Det första experimentella förhållandet fastställde att med direkt återkallelse hade semantiskt material högre grad av återkallelse än episodiskt material. Det andra experimentella förhållandet visade att effekten av artikulatoriskt undertryckande (articulatory suppression) inte signifikant sänker mängden som memorerat. Det tredje förhållandet demonstrerade att fördröjd återkallelse signifikant förminskade mängden orelaterad semantik. Dessa resultat visade att semantiskt material återkallas till högre grad men relaterad semantik och orelaterad semantik lagras av olika system då orelaterad semantik är påverkad av förfall (decay) eller störning (interference). Resultaten visade betydelsen av att använda simpelt och precist språk för att ge ett mer effektivt sätt att memorera och lära sig.
Much of our cognitive abilities rely on maintaining and processing the meaning of different objects, words or actions. This meaning is known as semantics however, the use of semantics in working memory have been mostly ignored and instead attributed to long-term semantic memory. Using Baddeley and Hitch’s model of working memory this study aims to attribute semantic maintenance to a component within the model, examine differences between types of semantic material to episodic material and how these were affected by serial position effects. Related semantics, unrelated semantics and episodic material were included in the study which were all represented by word-pairs. 42 participants, using a convenience sampling method, were randomly assigned to one of three experimental conditions designed to alter the amount of material memorized. The first experimental condition, by using immediate recall, demonstrated that semantic materials had a significantly superior recall rate than episodic materials. The second experimental condition showed that the effect articulatory suppression didn’t significantly reduce the amount memorized. The third condition demonstrated that delayed recall significantly reduced the amount of unrelated semantics. These findings showed that semantic materials had superior recall but related and unrelated semantic material were found to be maintained by different systems as unrelated material was subject to decay or interference. The results showed the importance using simple and precise language to provide a more effective way to memorize and learn.

Parallel robots with configurable platform are a class of parallel robots in which the end-effector is a closed-loop flexible chain of rigid links. We have developed a 5-RRR planar mechanism that features a flexible 5-bar chain as end-effector. The angles between adjacent sides of this chain can be controlled through the actuated revolute joints attached to the base of the mechanism. This thesis consists in the geometrical design of n-RRR planar parallel robots and in the study of the Direct Kinematics for 4-, 5- and 6-RRR mechanisms using Bilateration, a method that greatly reduces the computational time for the kinematic analysis. The next step is the singularity analysis for the n-RRR robot architectures; finally, in the last part of this thesis we present the results from experimental tests that have been performed on a 5-RRR robot prototype.

There is suggestion of obtaining exact position in this work, based on GPS and GSM modules controlled by PIC microcontroller. Layout of this work is electronic schematic, PCB footprint and theoretical analysis of used modules. The practical part of work is also dealing with software for both microprocessor and web interface. The function prototype will be created and tested in next phases of this project.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A automação de esteiras rolantes é algo comum e importante em sistemas industriais, mas problemas práticos ainda representam desafios. Um dos desses desafios é manter a precisão em sistemas que exigem paradas sistemáticas, pois folgas mecânicas tendem a provocar variações nas posições de paradas ao longo do tempo. A aplicação de motores de indução têm se tornado comum e soluções eficientes e de baixo custo têm sido pesquisadas. Neste trabalho foi desenvolvido e implementado um sistema de controle de posição e velocidade aplicado em esteiras transportadoras utilizando inversor de frequência, microcontrolador, encoder óptico incremental e sensor indutivo. O movimento da esteira transportadora é efetuado por um motor de indução trifásico, que é acionado pelo conjunto microcontrolador – inversor de frequência. Este conjunto impõe uma frequência no estator do motor através de uma troca de mensagens entre microcontrolador e inversor de frequência (Sistema Mestre-Escravo). Para o envio e recebimento das mensagens, utilizou-se o protocolo de comunicação serial USS® (Universal Serial Interface Protocol) através do padrão RS-485. Os controles de posição e velocidade de rotação do eixo do motor fundamentam-se no sinal gerado pelo encoder óptico incremental, responsável por informar a posição do eixo do motor ao longo da trajetória, e no sensor indutivo que determina uma referência externa importante para a esteira transportadora. Para o funcionamento automático da esteira, elaborou-se um software em linguagem de programação C. Como resultado obteve-se um sistema de controle de posição e velocidade do eixo do motor de indução trifásico que apresenta bons resultados
Automated conveyors system have been largely used in industrial applications. However, there are still practical issues to be overcome. One of them is due to the system mechanical limitation which can lead to low accuracy for applications based on “stop-and-go” movements. Induction motors have been largely used in such applications and low costs solutions have been searched. In this work it was developed and implemented a system of positioning and velocity control applied to conveyors which is based on frequency inverter, microcontroller, optical incremental encoder and inductive sensor. The conveyor’s movement is made by means of a three-phase induction motor, which is driven by the couple microcontroller–frequency inverter. There are messages exchange between the microcontroller and the frequency inverter (Master – Slave configuration) which is based on the communication serial protocol USS through the RS-485 standard. The position and velocity of the motor spindle are controlled using an optical incremental encoder, which is responsible to provide the position of the trajectory, and an inductive sensor which determines the initial reference to the conveyor. The software used to control the system was developed in C language. The results show a low cost system with good results

Orientador: Jozué Vieira Filho
Banca: Carlos Antonio Alves
Banca: Tony Inácio da Silva
Resumo: A automação de esteiras rolantes é algo comum e importante em sistemas industriais, mas problemas práticos ainda representam desafios. Um dos desses desafios é manter a precisão em sistemas que exigem paradas sistemáticas, pois folgas mecânicas tendem a provocar variações nas posições de paradas ao longo do tempo. A aplicação de motores de indução têm se tornado comum e soluções eficientes e de baixo custo têm sido pesquisadas. Neste trabalho foi desenvolvido e implementado um sistema de controle de posição e velocidade aplicado em esteiras transportadoras utilizando inversor de frequência, microcontrolador, encoder óptico incremental e sensor indutivo. O movimento da esteira transportadora é efetuado por um motor de indução trifásico, que é acionado pelo conjunto microcontrolador - inversor de frequência. Este conjunto impõe uma frequência no estator do motor através de uma troca de mensagens entre microcontrolador e inversor de frequência (Sistema Mestre-Escravo). Para o envio e recebimento das mensagens, utilizou-se o protocolo de comunicação serial USS® (Universal Serial Interface Protocol) através do padrão RS-485. Os controles de posição e velocidade de rotação do eixo do motor fundamentam-se no sinal gerado pelo encoder óptico incremental, responsável por informar a posição do eixo do motor ao longo da trajetória, e no sensor indutivo que determina uma referência externa importante para a esteira transportadora. Para o funcionamento automático da esteira, elaborou-se um software em linguagem de programação C. Como resultado obteve-se um sistema de controle de posição e velocidade do eixo do motor de indução trifásico que apresenta bons resultados
Abstract: Automated conveyors system have been largely used in industrial applications. However, there are still practical issues to be overcome. One of them is due to the system mechanical limitation which can lead to low accuracy for applications based on "stop-and-go" movements. Induction motors have been largely used in such applications and low costs solutions have been searched. In this work it was developed and implemented a system of positioning and velocity control applied to conveyors which is based on frequency inverter, microcontroller, optical incremental encoder and inductive sensor. The conveyor's movement is made by means of a three-phase induction motor, which is driven by the couple microcontroller-frequency inverter. There are messages exchange between the microcontroller and the frequency inverter (Master - Slave configuration) which is based on the communication serial protocol USS through the RS-485 standard. The position and velocity of the motor spindle are controlled using an optical incremental encoder, which is responsible to provide the position of the trajectory, and an inductive sensor which determines the initial reference to the conveyor. The software used to control the system was developed in C language. The results show a low cost system with good results
Mestre

This thesis is oriented towards the investigation of the opportunities for ‘positive futures’ in and through sport in Serbia. It critically explores the social significance of established and emerging sports—football (grassroots programme) and rugby league—in the challenging social context of Serbian society via the theoretical prism of social capital. Contemporary debate on sport’s social role, underlining its multidimensional capacity in the creation and maintenance of social capital and associated socially cohesive processes—social inclusion, social integration and active civic participation—in and through sport, is often instigated within the developed world academe, and has not been oriented to questioning the link between sport, social capital and community benefits in the contexts of ‘transitional’ societies residing at the European semi-periphery. This thesis seeks, hence, to address this void by examining the social implications of sport for a multitude of communities in the context of semi-peripheral Serbia. In particular, it investigates the extent to which, and the ways in which, selected sports foster or impede the creation of different forms of social capital instrumental in sport and community development, including the role of wider social and sport policy contexts in these endeavours. Methodologically, the study deploys a qualitative multiple-case study approach using semi-structured individual and group interviews in conjuction with content analysis of official documents and direct observation of selected cases. The exploration of evolving contexts of selected sports against the backdrop of Serbia suggests that the representation of different forms of social capital varies among researched cases relevant to their position within the meso sporting context and to specific traits of the wider social context. In this vein, as a dynamic and transferable social construct, social capital generated and maintained in and through explored sports floats between bonding and bridging points on an axis with linking social capital residing closer to the bonding point on this axis. In these constellations norms of reciprocity are positioned as the key cultural element of the emerging social capital models that assist in opening up the opportunities for expanding social cohesion via social inclusion, social integration and active civic participation. Likewise, the evidence from the study challenges a dominant social capital conceptual approach by portraying the ways cultural elements of the concept—trust and norms of reciprocity—are mutually interwoven, context-dependent and how they interact in their structural webs within extracted sport social capital models. As evidence from the research further shows, the nature of social capital in regard to the explored sports corresponds to the ways socially cohesive processes are established for different scale community benefits. Yet, the reflextion of the correlation between the nature of social capital and the nature of socially cohesive processes in and around selected sports indicates that bonding social capital generated in and through sport may have the capacity to maintain socially cohesive processes while an inherently positive association between bridging social capital and community benefits in and through sport in this particular social context needs to be revisited. Finally, in examining the environment for sport and community development in Serbia, it is indicative that a pro-social sport policy context should comprehensively account for the wider social relevance of sport and its ability to imbue bottom-up cultural change at both sport and society levels. This awarness is central to policy recommendations formulated in the conclusion of this thesis. This study thus provides an original contribution to knowledge by probing the nexus between investigated sports and the nature of social capital created, the role, position and interrelatedness of distincitive structral and cultural social capital elements within the created sport social capital models, associated social benefits and pro-social sport policies in the semi-peripheral context of Serbia.

This thesis deals with design of a laser position detector. Different types of sensor are mentioned and compared at the beginning. Special attention is paid to quadrant sensor. Its pros and cons are discussed with designing methods. The sensor is simulated in Matlab to test its output response. Then the laboratory tests follow to meassure real response of the chip. Then follows the design of the detector based on measured and simulated data. In the conclusion of this thesis parameters of created device are evaluated.

Diagnosis of diabetes mellitus, presence of hyperglycemia, and/or insulin resistance confer cardiovascular risk, particularly for diastolic dysfunction. Diabetes is associated with elevated myocardial norepinephrine (NE) content, enhanced sympathetic nervous system (SNS) activity, altered resting heart rate, and depressed heart rate variability. Positron emission tomography (PET) using the NE analogue [11C]meta-hydroxyephedrine ([11C]HED) provides an index of myocardial sympathetic neuronal integrity at the NE reuptake transporter (NET). The hypothesis of this project is that (i) hyperglycemia imparts heightened sympathetic tone and NE release, leading to abnormal sympathetic neuronal function in the hearts of diabetic rats, and (ii) these abnormalities may be reversed or prevented by treatments to normalize glycemia. Sprague Dawley rats were rendered insulin resistant by high fat feeding and diabetic by a single dose of streptozotocin (STZ). Diabetic rats were treated for 8 weeks with insulin, metformin or rosiglitazone, starting from either 1 week (prevention) or 8 weeks (reversal) after STZ administration. Sympathetic neuronal integrity was evaluated longitudinally by [11C]HED PET. Echocardiography measures of systolic and diastolic function were completed at serial timepoints. Plasma NE levels were evaluated serially and expression of NET and β-adrenoceptors were tested at the terminal endpoints. Diabetic rats exhibited a 52-57% reduction of [11C]HED standardized uptake value (SUV) at 8 weeks after STZ, with a parallel 2.5-fold elevation of plasma NE and a 17-20% reduction in cardiac NET expression. These findings were confirmed by ex vivo biodistribution studies. Transmitral pulse wave Doppler echocardiography established an extension of mitral valve deceleration time and elevated early to atrial velocity ratio, suggesting diastolic dysfunction. Subsequent treatment with insulin but not metformin restored glycemia, reduced plasma NE by 50%, normalized NET expression, and recovered [11C]HED SUV towards non-diabetic age-matched control. Diastolic dysfunction in these rats persisted. By contrast, early treatment with insulin, metformin, or rosiglitazone delayed the progression of diastolic dysfunction, but had no effect on elevated NE and reduced [11C]HED SUV in diabetic rats, potentially owing to a latent decrease in blood glucose. In conclusion, diabetes is associated with heightened circulating and tissue NE levels which can be effectively reversed by lowering glycemia with insulin. Noninvasive interrogation of sympathetic neuronal integrity using [11C]HED PET may have added value in the stratification of cardiovascular risk among diabetic patients and in determining the myocardial effects of glycemic therapy.

El objetivo del presente estudio fue analizar el impacto que ejerce la ficción audiovisual sobre las actitudes hacia las personas homosexuales en el contexto específico de la cultura serbia. En particular, este estudio observa los procesos que explican el cambio de actitud hacia las personas homosexuales a través de la película titulada La Parada (2011), que conlleva una representación positiva de los hombres homosexuales. En el estudio participaron 200 estudiantes universitarios (M = 21.64, SD = 2.27). Se aplicó un diseño de investigación cuasi-experimental en la que todos los participantes fueron divididos en dos grupos: un grupo experimental (N= 150), y un grupo de control (N = 50). La recogida de datos se realizó en dos fases separadas por un período de 30 días. En la primera fase se recogieron los datos del pre-test: todos los participantes rellenaron un cuestionario que contenía la información socio-demográfica y el instrumento H25 que medía la homofobia. Al cabo de un mes, se realizó una segunda recogida de datos. En esta fase, el grupo experimental vio la película, y después del visionado, rellenó un cuestionario que medía la homofobia, la identificación con el personaje, el contacto intergrupal, así como el efecto de la tercera persona. Por otro lado, el grupo de control no vio la película, y volvió a rellenar el cuestionario que contenía el instrumento H25 de medición de la homofobia. Se aplicó un método cuantitativo con el fin de identificar las relaciones entre las variables subyacentes, y para determinar magnitudes de sus efectos. Los resultados principales revelan que el grupo experimental, en comparación con el grupo de control ha mostrado la actitud más favorable hacia las personas homosexuales. Los resultados asimismo indican que los hombres expresaron un mayor nivel de homofobia respecto a las mujeres. La identificación con el personaje homosexual se asoció positivamente con la aceptación de la homosexualidad después del visionado de la película. Igualmente, se obtuvo una correlación positiva entre el contacto intergrupal y la identificación con el personaje. La religiosidad y el efecto de la tercera persona se asociaron negativamente con los niveles de homofobia. La menor identificación con el personaje fue asociada con los niveles más altos de religiosidad y del efecto de tercera persona. Al encontrar su relevancia dentro del contexto serbio, nuestra investigación hace una contribución general a los estudios anteriores que conciernen a las influencias y los efectos de las ficciones audiovisuales en el cambio de actitud.
Abstract The objective of the present study is to analyze the impact of audiovisual fiction on attitudes towards gay people within the specific Serbian culture. Particularly, this study observes the processes explaining attitude change towards homosexuality through a positive representation of gay men depicted in the film The Parade (2011). The study was based on a sample of 200 college students (M = 21.64, SD = 2.27). We applied a quasi-experimental research design and divided all participants into two groups: an experimental group (N=150), and a control group (N=50). There were two phases of data collection separated by 30 days. Firstly, we collected data in the pre-test: All the participants filled in a questionnaire consisted of socio-demographic information and the instrument H25 measuring homophobia. One month later, we performed a second data collection. In this phase, the experimental group and the control group differed in some of the tasks they were asked to complete. The experimental group watched the film, and after the exposure, filled in a questionnaire measuring homophobia, identification with the character, intergroup contact and the third person effect. On the other hand, the control group did not watch the film, and once again filled in a questionnaire measuring homophobia. We applied quantitative method in order to identify subjacent relations between the variables, and to determine magnitudes of their effects. Main results reveal that experimental group, compared with a control group, showed more favorable attitude towards gay people. Results also found that men expressed higher level of homophobia than women. Identification with character was positively associated with acceptance of homosexuality. We also obtained positive correlation between the identification and intergroup contact. Religiosity and the third person effect were negatively associated with homophobia score. The less identification with the character the participants achieved, the higher level of religiosity, and the third person effect they expressed. In conclusion, the study makes a general contribution by reinforcing the results of previous media effect related studies, and finds their relevance within the

The Intertropical Convergence Zone (ITCZ) is a feature that results from the ocean-atmosphere interactions in the tropics around the world. The ITCZ is characterized by surface wind convergence, tall storm clouds, and it forms a belt of high time-averaged precipitation around the globe. The ITCZ undergoes seasonal migrations between 5°S and 15°N roughly following the subsolar point on Earth with the seasons, with a mean annual position located slightly above the Equator, between 2° and 5°N.

This study tested the hypothesis that there was a northward shift in the median position of the ITCZ in the first decade of the 2000’s relative to the 1900’s. This hypothesis has been posed in the literature given a weakening in the intensity of the Trade Winds observed in the southern Caribbean Sea during the first decade of the 2000’s, with concomitant ecological impacts due to weakening in coastal wind-driven upwelling. The hypothesis was tested by analyzing variations in the monthly latitudinal position of the ITCZ over the Atlantic Ocean relative to the median position computed for the period 1987–2011. The position of the ITCZ was derived from satellite-derived ocean surface wind measurements collected from 1987 to 2011. A Mann-Kendall analysis and a Monte Carlo simulation were used to test for trends in the median cross-basin latitudinal position of the ITCZ. The study included an analysis of regional changes across the tropical central Atlantic (50°W to 15°W), the Western Atlantic (50°W to 30°W), and the Eastern Atlantic (30°W to 15°W) within the tropics. The results show a slight southward trend in the median position of the ITCZ over the central Atlantic and also in the Eastern Atlantic in the first decade of the 2000’s relative to the 1990’s. While this trend is barely significant, it is likely simply due to interannual variation in the average annual position of the ITCZ.

The data were also examined for the timing and persistence of a double ITCZ in the Atlantic. The double ITCZ over the Atlantic appeared every year in February or March, with the largest separation between the northern and southern branches of the ITCZ observed in June and July.

The possible effects of changes in the average latitudinal position of the ITCZ on the upwelling in the Cariaco Basin (southeastern Caribbean Sea off Venezuela) were also examined. Anomalies of the median of the latitudinal position of the ITCZ in the Atlantic were compared with anomalies of in-situ temperature collected during the 1990’s and the first decade of the 2000’s by the CARIACO Ocean Time-Series program and with anomalies of satellite SST (from the Advanced Very High Resolution Radiometer satellite; AVHRR) from 1995 to 2016. Correlation analysis were performed between anomalies of water temperatures at various depths and anomalies of satellite SST with anomalies of the monthly mean ITCZ position with lags up to 3 months for the time series, and also just for the Cariaco basin upwelling months (December-April).

For the whole Cariaco time series there were no significant correlations between the anomalies of the ITCZ position and anomalies in subsurface temperatures in the Cariaco Basin. However, during the upwelling period, the central Atlantic and Western Atlantic ITCZ position anomalies were directly correlated with Cariaco Basin temperature anomalies with no-lag (r = 0.20), and the central and Eastern Atlantic ITCZ position anomalies were inversely correlated with Cariaco Basin temperatures (r ~ -0.22 to -0.28) with ITCZ leading Cariaco temperatures by 3 months. However, these correlations were low, indicating that other factors than the position of ITCZ latitudinal position play bigger role on the Cariaco basin upwelling variability.

Interannual variability in oceanographic and meteorological characteristics of the Atlantic Ocean are expected as a result of large-scale changes in other regions of the world, including due to changes such as the El Niño Southern Oscillation (ENSO) and the Atlantic Multidecadal Oscillation (AMO). Six oceanic-atmospheric variables are used to monitor ENSO over the tropical Pacific, while the AMO is determined by monitoring SST over the Atlantic. Correlations with lags of up to ± 6 months were conducted with those climate indices and the anomalies of the median monthly latitudinal position of the ITCZ. Significant direct correlations with ENSO (Multivariate ENSO Index) were seen in the Atlantic and Western Atlantic (r = 0.15), with ENSO leading the position of the ITCZ anomalies by 3 months. This implies that within three months after an El Niño event (warm ENSO anomaly in the Pacific) the ITCZ over the mid-Atlantic and Western Atlantic Ocean tends to shift to a more northerly position. The AMO also had a direct influence on the anomalies of the ITCZ position (r = 0.13) in the Central and the Western Atlantic, with the AMO leading ITCZ anomalies by 1 month (i.e. a warming of the North Atlantic led to a northward shift in the ITCZ one month later). Correlations between AMO and the ITCZ anomalies in the Eastern Atlantic were also direct but with no lag. Although significant, these correlations were low.

An inverse correlation (~ -0.35) was found between ENSO and anomalies of water temperature of the Cariaco Basin. ENSO lagged ocean temperature anomalies by 3 to 4 months for both the whole Cariaco time series and for the upwelling months of CARIACO data. Correlations with AMO were direct (~ 0.4); for the whole time series AMO led Cariaco temperature anomalies by 3 months, but for the upwelling months AMO lagged Cariaco temperature anomalies by one month.

Rozbor oficiálních stanovisek EU k rozšíření EU o země Západního Balkánu (Chorvatsko, Makedonie, Černá Hora, Albánie, BiH, Srbsko, nově Kosovo) ukazuje na zdrženlivost EU k vlastnímu aktu přijetí. Přes všechna prohlášení o vůli přijmout tyto země, tato vyjádření zůstávají spíše proklamací, bez vyhlášení konkrétních dat přijetí těchto zemí do společenství. Na rozdíl od Rakouska, která jako jediná země EU deklaruje co nejrychlejší rozšíření EU o země Západního Balkánu přímo ve vládním programu jako prioritu své zahraniční politiky. Motivace Rakouska je založena na důkladné ekonomické analýze situace, kdy Rakouské investice do těchto zemí jsou nejvyšší ze všech zemí EU. Mezi Rakouskem a zeměmi Západního Balkánu a Rakouskem probíhá čilý obchod i pohyb osob, na který ostatní země EU nejsou ještě připraveny. Překážkou rychlého přijetí se tedy jeví důvody povahy nikoliv ekonomické, ale politické. Evropská unie se shoduje na roku 2008 jako na roku klíčovém v přístupových jednáních. V době publikace této práce ovšem EU nebyla s to jako celek schválit nezávislost Kosova. Minimálně tento bod zůstává otevřen k dořešení v roce 2008 spolu s dalšími body týkajícími se příštího rozšíření. EU má v této chvíli (duben 2008) jasno, že favorizovanými kandidáty pro přístup jsou Chorvatsko, Makedonie a Albánie, zatím bez konkrétního data přístupu.

Position estimation using only active phase voltage and current is presented to perform high accuracy position sensorless control of a SRM drive. By extracting the amplitude of the first switching harmonic terms of phase voltage and current for a PWM period through Fourier analysis, flux-linkage and position are estimated without external hardware circuitry such as a modulator and demodulator, resulting in increasing cost, as well as large position estimation error produced when the motional back emf is ignored near zero speed. Hence the proposed position estimation scheme covers the entire speed range including the standstill under various loads and it has high resolution information depending on switching frequency. Fourier series and Fast Fourier transform are employed to decompose the phase voltage and current into its first switching harmonic. A two-phase SRM drive system, consisting of an asymmetrical converter and a conventional closed-loop PI current controller, is utilized to validate the performance of the proposed position estimation scheme in comprehensive operating conditions. The estimated values very closely track the actual values in dynamic simulations and experiments. It is shown that the proposed position estimation scheme using Fourier analysis is sufficiently accurate and works satisfactorily at various operating points. This research also proposes an accurate self-inductance measurement method. In general, when applying circulating currents within the body of a ferromagnetic material under conditions of a time varying magnetic flux, the effects of eddy current losses and resistance changes due to heating decrease the magnetic field strength and thereby the reduced magnetic field decreases the magnetic flux-linkage of SRM. These losses make a challenge to the measurement of magnetic characteristics of SRM. These motives lead to propose a measurement methodology based on 60 Hz sinusoidal excitation using a variable AC power supply, which provides an alternative to time domain integration approaches for self-inductance or flux-linkage measurement as well as eliminates error arising from thermal and eddy currents effects. The validation of the proposed method is verified with the correlation between the measurement and FEA results of flux-linkage. Furthermore, this research proposes the solutions for low cost and high efficiency drive systems, consisting of a split AC converter and a two-phase SRM. Its performance is analyzed and verified with experiments at the rated speed under various loads. It is believed that this drive system combined with the proposed position estimation scheme using Fourier analysis is a strong contender to be a low cost motor drive system with single switch per phase having comparable efficiency and acoustic noise level as an asymmetric drive system.
Ph. D.

This study demonstrates a fully Bayesian approach to multilevel/hierarchical linear growth modeling using freely available software. Further, the study incorporates informative prior distributions for fixed effect estimates using an objective approach. The objective approach uses previous sample results to form prior distributions included in subsequent samples analyses, a process referred to as Bayesian updating. Further, a method for model checking is outlined based on fit indices including information criteria (i.e., Akaike information criterion, Bayesian information criterion, and deviance information criterion) and approximate Bayes factor calculations. For this demonstration, five distinct samples of schools in the process of implementing School-Wide Positive Behavior Interventions and Supports (SWPBIS) collected from 2008 to 2013 were used with the unit of analysis being the school. First, the within-year SWPBIS fidelity growth was modeled as a function of time measured in months from initial measurement occasion. Uninformative priors were used to estimate growth parameters for the 2008-09 sample, and both uninformative and informative priors based on previous years' samples were used to model data from the 2009-10, 2010-11, 2011-12, 2012-13 samples. Bayesian estimates were also compared to maximum likelihood (ML) estimates, and reliability information is provided. Second, an additional three examples demonstrated how to include predictors into the growth model with demonstrations for: (a) the inclusion of one school-level predictor (years implementing) of SWPBIS fidelity growth, (b) several school-level predictors (relative socio-economic status, size, and geographic location), and (c) school and district predictors (sustainability factors hypothesized to be related to implementation processes) in a three-level growth model. Interestingly, Bayesian models estimated with informative prior distributions in all cases resulted in more optimal fit indices than models estimated with uninformative prior distributions.

[EN] Positron Emission Tomography (PET) is a non-invasive nuclear medical imaging modality that makes it possible to observe the distribution of metabolic substances within a patient's body after marking them with radioactive isotopes and arranging an annular scanner around him in order to detect their decays. The main applications of this technique are the detection and tracing of tumors in cancer patients and metabolic studies with small animals. The Electronic Design for Nuclear Applications (EDNA) research group within the Instituto de Instrumentación para Imagen Molecular (I3M) has been involved in the study of high performance PET systems and maintains a small experimental setup with two detector modules. This thesis is framed within the necessity of developing a new data acquisition system (DAQ) for the aforementioned setup that corrects the drawbacks of the existing one. The main objective is to define a DAQ architecture that is completely scalable, modular, and guarantees the mobility and the possibility of reusing its components, so that it admits any extension of modification of the setup and it is possible to export it directly to the configurations used by other groups or experiments. At the same time, this architecture should be compatible with the best possible resolutions attainable at the present instead of imposing artificial limits on system performance. In particular, the new DAQ system should outperform the previous one. As a first step, a general study of DAQ arquitectures is carried out in the context of experimental setups for PET and other high energy physics applications. On one hand, the conclusion is reached that the desired specifications require early digitization of detector signals, exclusively digital communication between modules, and the absence of a centralized trigger. On the other hand, the necessity of a very precise distributed synchronization scheme between modules becomes apparent, with errors in the order of 100 ps, and operating directly over the data links. A study of the existing methods reveals their severe limitations in terms of achievable precision. A theoretical analysis of the situation is carried out with the goal of overcoming them, and a new synchronization algorithm is proposed that is able to reach the desired resolution while getting rid of the restrictions on clock alignment that are imposed by virtually all usual schemes. Since the measurement of clock phase difference plays a crucial role in the proposed algorithm, extensions to the existing methods are defined and analyzed that improve them significantly. The proposed scheme for synchronism is validated using commercial evaluation boards. Taking the proposed synchronization method as a starting point, a DAQ architecture for PET is defined that is composed of two types of module (acquisition and concentration) whose replication makes it possible to arrange a hierarchic system of arbitrary size, and circuit boards are designed and commissioned that implement a realization of the architecture for the particular case of two detectors. This DAQ is finally installed at the experimental setup, where their synchronization properties and resolution as a PET system are characterized and its performance is verified to have improved with respect to the previous system.
[ES] La Tomografía por Emisión de Positrones (PET) es una modalidad de imagen médica nuclear no invasiva que permite observar la distribución de sustancias metabólicas en el interior del cuerpo de un paciente tras marcarlas con isótopos radioactivos y disponer después un escáner anular a su alrededor para detectar su desintegración. Las principales aplicaciones de esta técnica son la detección y seguimiento de tumores en pacientes con cáncer y los estudios metabólicos en animales pequeños. El grupo de investigación Electronic Design for Nuclear Applications (EDNA) del Instituto de Instrumentación para Imagen Molecular (I3M) ha estado involucrado en el estudio de sistemas PET de alto rendimiento y mantiene un pequeño setup experimental con dos módulos detectores. La presente tesis se enmarca dentro de la necesidad de desarrollar un nuevo sistema de adquisición de datos (DAQ) para dicho setup que corrija los inconvenientes del ya existente. En particular, el objetivo es definir una arquitectura de DAQ que sea totalmente escalable, modular, y que asegure la movilidad y la posibilidad de reutilización de sus componentes, de manera que admita cualquier ampliación o alteración del setup y pueda exportarse directamente a los de otros grupos o experimentos. Al mismo tiempo, se desea que dicha arquitectura no limite artificialmente el rendimiento del sistema sino que sea compatible con las mejores resoluciones disponibles en la actualidad, y en particular que sus prestaciones superen a las del DAQ instalado previamente. En primer lugar, se lleva a cabo un estudio general de las arquitecturas de DAQ para setups experimentales para PET y otras aplicaciones de física de altas energías. Por un lado, se determina que las características deseadas implican la digitalización temprana de las señales del detector, la comunicación exclusivamente digital entre módulos, y la ausencia de trigger centralizado. Por otro lado, se hace patente la necesidad de un esquema de sincronización distribuida muy preciso entre módulos, con errores del orden de 100 ps, que opere directamente sobre los enlaces de datos. Un estudio de los métodos ya existentes revela sus graves limitaciones a la hora de alcanzar esas precisiones. Con el fin de paliarlos, se lleva a cabo un análisis teórico de la situación y se propone un nuevo algoritmo de sincronización que es capaz de alcanzar la resolución deseada y elimina las restricciones de alineamiento de reloj impuestas por casi todos los esquemas usuales. Dado que la medida de desfase entre relojes juega un papel crucial en el algoritmo propuesto, se definen y analizan extensiones a los métodos ya existentes que suponen una mejora sustancial. El esquema de sincronismo propuesto se valida utilizando placas de evaluación comerciales. Partiendo del método de sincronismo propuesto, se define una arquitectura de DAQ para PET compuesta de dos tipos de módulos (adquisición y concentración) cuya replicación permite construir un sistema jerárquico de tamaño arbitrario, y se diseñan e implementan placas de circuito basadas en dicha arquitectura para el caso particular de dos detectores. El DAQ así construído se instala finalmente en el setup experimental, donde se caracterizan tanto sus propiedades de sincronización como su resolución como sistema PET y se comprueba que sus prestaciones son superiores a las del sistema previo.
[CAT] La Tomografia per Emissió de Positrons (PET) és una modalitat d'imatge mèdica nuclear no invasiva que permet observar la distribució de substàncies metabòliques a l'interior del cos d'un pacient després d'haver-les marcat amb isòtops radioactius disposant un escàner anular al seu voltant per a detectar la seua desintegració. Aquesta tècnica troba les seues principals aplicacions a la detecció i seguiment de tumors a pacients amb càncer i als estudis metabòlics en animals petits. El grup d'investigació Electronic Design for Nuclear Applications (EDNA) de l'Instituto de Instrumentación para Imagen Molecular (I3M) ha estat involucrat en l'estudi de sistemes PET d'alt rendiment i manté un petit setup experimental amb dos mòduls detectors. Aquesta tesi neix de la necessitat de desenvolupar un nou sistema d'adquisició de dades (DAQ) per al setup esmentat que corregisca els inconvenients de l'anterior. En particular, l'objectiu és definir una arquitectura de DAQ que sigui totalment escalable, modular, i que asseguri la mobilitat i la possibilitat de reutilització dels seus components, de tal manera que admeta qualsevol ampliació o alteració del setup i pugui exportar-se directament a aquells d'altres grups o experiments. Al mateix temps, es desitja que aquesta arquitectura no introduisca límits artificials al rendiment del sistema sinó que sigui compatible amb les millors resolucions disponibles a l'actualitat, i en particular que les seues prestacions siguin superiors a les del DAQ instal.lat amb anterioritat. En primer lloc, es porta a terme un estudi general de les arquitectures de DAQ per a setups experimentals per a PET i altres aplicacions de física d'altes energies. Per una banda, s'arriba a la conclusió que les característiques desitjades impliquen la digitalització dels senyals del detector el més aviat possible, la comunicació exclusivament digital entre mòduls, i l'absència de trigger centralitzat. D'altra banda, es fa palesa la necessitat d'un mecanisme de sincronització distribuïda molt precís entre mòduls, amb errors de l'ordre de 100 ps, que treballi directament sobre els enllaços de dades. Un estudi dels mètodes ja existents revela les seues greus limitacions a l'hora d'assolir aquest nivell de precisió. Amb l'objectiu de pal.liar-les, es duu a terme una anàlisi teòrica de la situació i es proposa un nou algoritme de sincronització que és capaç d'obtindre la resolució desitjada i es desfà de les restriccions d'alineament de rellotges imposades per gairebé tots els esquemes usuals. Atès que la mesura del desfasament entre rellotges juga un paper cabdal a l'algoritme proposat, es defineixen i analitzen extensions als mètodes ja existents que suposen una millora substancial. L'esquema de sincronisme proposat es valida mitjançant plaques d'avaluació comercials. Prenent el mètode proposat com a punt de partida, es defineix una arquitectura de DAQ per a PET composta de dos tipus de mòduls (d'adquisició i de concentració) tals que la replicació d'aquests elements permet construir un sistema jeràrquic de mida arbitrària, i es dissenyen i implementen plaques de circuit basades en aquesta arquitectura per al cas particular de dos detectors. L'electrònica desenvolupada s'instal.la finalment al setup experimental, on es caracteritzen tant les seues propietats de sincronització com la seua resolució com a sistema PET i es comprova que les seues prestacions són superiors a les del sistema previ.
Aliaga Varea, RJ. (2016). Development of a data acquisition architecture with distributed synchronization for a Positron Emission Tomography system with integrated front-end [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/63271
TESIS
Premiado

Eine Vielzahl geophysikalischer Prozesse im System Erde gehen mit Massenverlagerungen einher. Änderungen in der Massenverteilung führen zu beobachtbaren Änderungen im Schwerefeld und Rotationsverhalten der Erde sowie zu einer Deformation der Erdkruste. Die messtechnische Erfassung dieser Größen erlaubt einen Rückschluss auf die beteiligten Massentransportprozesse und stellt damit eine Grundvoraussetzung für die Erdsystemforschung dar. Satellitengestützte Navigationssysteme wie z.B. das Global Positioning System (GPS) spielen in diesem Zusammenhang eine zentrale Rolle, denn sie ermöglichen eine präzise Positionsbestimmung auf globaler Ebene. Für die Bestimmung eines terrestrischen Referenzrahmens werden üblicherweise mittlere Koordinaten zu einer Referenzepoche sowie zugehörige lineare Änderungen mit der Zeit angenommen. Bei diesem Konzept führen alle nichtlinearen Stationsbewegungen, deren Effekte im Rahmen der Beobachtungsmodellierung nicht reduziert werden, zu Abweichungen gegenüber dem linearen Bewegungsmodell. Diese Abweichungen haben Einfluss auf die Positionszeitreihen der in Betracht gezogenen Stationen und erlauben einen Rückschluss auf die auflastinduzierenden Änderungen in der Massenverteilung. Die Bestimmung von Stationspositionszeitreihen mittels GPS bildet den Kern der vorliegenden Arbeit. Die Arbeit baut inhaltlich auf vier Publikationen auf, die sich unterschiedlichen Fragestellungen in Bezug auf die Positionsbestimmung mittels GPS widmen. Eine zusammenfassende Diskussion gibt einen Überblick über Massenvariationen im System Erde und auflastinduzierte Krustendeformation. Spezielle Aspekte in Bezug auf eine konsistente Modellierung von Massenvariationen und daraus abgeleiteter Deformationsanteile werden hier dargelegt. Praktische Untersuchungen erfolgen zu Änderungen in der Massenverteilung aufgrund von atmosphärischen Druckvariationen, Ozeanzirkulation und hydrologisch bedingten Wasserspeicheränderungen im Bereich der Kontinente. Der Einfluss ionosphärischer Terme höherer Ordnung auf GPS-Parameterschätzwerte wird untersucht. Diese Analyse erfolgt vor dem Hintergrund, dass bei der vermittelnden Ausgleichung generell auch systematische Effekte, die für sich genommen keine Stationspositionsänderung verursachen, trotzdem Einfluss auf geschätzte Stationskoordinaten haben. Die Sensitivität der GPS-Beobachtungen gegenüber der Auflastdeformation wird genutzt, modellierte Massenvariationen zu validieren. Mittels gegebener Massenvariationen werden Deformationszeitreihen abgeleitet. Für diese Zeitreihen werden im Zuge der Parameterschätzung Skalierungsfaktoren bestimmt und als Indikator für die Übereinstimmung zwischen modellierter und beobachteter Deformation gewertet. Änderungen der Massenverteilung im System Erde zeichnen sich unter anderem durch eine Schwerpunktverlagerung gegenüber der festen Erde aus. Wird die Massenverteilung durch eine sphärisch-harmonische Reihenentwicklung dargestellt, so sind die Terme ersten Grades mit der Schwerpunktverlagerung verknüpft. Die Grad-1-Anteile der Massenvariation können mittels satellitengravimetrischer Beobachtungen prinzipiell nicht bestimmt werden. Sie lassen sich aber mit Hilfe der GPS-Beobachtungen aus dem zugehörigen Deformationsanteil ermitteln. Der Einfluss systematischer Beobachtungsfehler auf diesem Inversionsansatz wird untersucht. Bei der Bestimmung globaler GPS-Lösungen werden die in den Beobachtungen enthaltenen Auflasteffektes prinzipiell auf alle simultan geschätzten Parameter abgebildet. Diese systematische Verfälschung erschwert die geophysikalische Interpretation von Stationspositionszeitreihen. Ein integrierter Ansatz wird entwickelt, um bestehende Vorinformation über verschiedene Massenvariationsprozesse bestmöglich einzubeziehen.

Ovarian cancer (OC) is the fifth most common cancer among women and has the highest mortality of any cancer of the female reproductive system. The majority (61%) of OC cases are diagnosed at a distant stage. Because diagnoses occur most commonly at a late-stage and prognosis for advanced disease is poor, research focusing on the development of effective OC screening methods to facilitate early detection in high-risk, asymptomatic women is fundamental in reducing OC-specific mortality. Presently, there is no screening modality proven efficacious in reducing OC-mortality. However, transvaginal ultrasonography (TVS) has shown value in early detection of OC. TVS presents with the possibility of false positive results which occur when a women receives an abnormal TVS screening test result that is deemed benign following repeat testing (about 7% of the time). The purpose of this dissertation was to evaluate the impact of false positive TVS screening test results on a variety of psychological and behavioral outcomes using mixed and trajectory statistical modeling. The three specific aims of this dissertation were to 1) compare psychological and behavioral outcomes between women receiving normal and false positive results, 2) identify characteristics of women receiving false positive results associated with increased OC-specific distress and 3) characterize distress trajectories following receipt of false positive results. Analyses included a subset of women participating in an experimental study conducted through the University of Kentucky Ovarian Cancer Screening Program. 750 women completed longitudinal assessments: 375 false positive and 375 normal results. Mixed and group-based trajectory modeling were used to evaluate the specific aims. Results suggest women receiving false positive TVS result experience increased OC-specific distress compared to women receiving normal results. Among those receiving false positives, less education, no history of an abnormal screening test result, less optimism and more social constraint were associated with increased OC-specific distress. Family history was associated with increased distress among women with monitoring informational coping styles. Three distinct trajectories characterize the trajectory of distress over a four-month study period. Although decreasing over time, a notable proportion of women experience sustained high levels of OC-specific distress.

Cette thèse étudie quelques problèmes d’analyse harmonique sur les groupes quantiques compacts. Elle consiste en trois parties. La première partie présente la théorie Lp élémentaire des transformées de Fourier, les convolutions et les multiplicateurs sur les groupes quantiques compacts, y compris la théorie de Hausdorff-Young et les inégalités de Young.Dans la seconde partie, nous caractérisons les opérateurs de convolution positifs sur un groupe quantique fini qui envoient Lp dans L2, et donnons aussi quelques constructions sur les groupes quantiques compacts infinis. La méthode pour étudier les états non-dégénérés fournit une formule générale pour calculer les états idempotents associés aux images deHopf, qui généralise un travail de Banica, Franz et Skalski. La troisième partie est consacrée à l’étude des ensembles de Sidon, des ensembles _(p) et des notions associées pour les groupes quantiques compacts. Nous établissons différentes caractérisations des ensembles de Sidon, et en particulier nous démontrons que tout ensemble de Sidon est un ensemble de Sidon fort au sens de Picardello. Nous donnons quelques liens entre les ensembles de Sidon, les ensembles _(p) et les lacunarités pour les multiplicateurs de Fourier sur Lp, généralisant un travail de Blendek et Michali˘cek. Nous démontrons aussi l’existence des ensembles de type _(p) pour les systèmes orthogonaux dans les espaces Lp non commutatifs, et déduisons les propriétés correspondantes pour les groupes quantiques compacts. Nous considérons aussi les ensembles de Sidon centraux, et nous prouvons que les groupes quantiques compacts ayant les mêmes règles de fusion et les mêmes fonctions de dimension ont des ensemble de Sidon centraux identiques. Quelques exemples sont aussi étudiés dans cette thèse. Les travaux présentés dans cette thèse se basent sur deux articles de l’auteur. Le premier s’intitule “Lp-improving convolution operators on finite quantum groups” et a été accepté pour publication dans Indiana University Mathematics Journal, et le deuxième est un travail intitulé “Lacunary Fourier series for compact quantum groups” et a été publié en ligne dans Communications in Mathematical Physics
This thesis studies some problems in the theory of harmonic analysis on compact quantum groups. It consists of three parts. The first part presents some elementary Lp theory of Fourier transforms, convolutions and multipliers on compact quantum groups, including the Hausdorff-Young theory and Young’s inequalities. In the second part, we characterize positive convolution operators on a finite quantum group G which are Lp-improving, and also give some constructions on infinite compact quantum groups. The methods for ondegeneratestates yield a general formula for computing idempotent states associated to Hopf images, which generalizes earlier work of Banica, Franz and Skalski. The third part is devoted to the study of Sidon sets, _(p)-sets and some related notions for compact quantum groups. We establish several different characterizations of Sidon sets, and in particular prove that any Sidon set in a discrete group is a strong Sidon set in the sense of Picardello. We give several relations between Sidon sets, _(p)-sets and lacunarities for Lp-Fourier multipliers, generalizing a previous work by Blendek and Michali˘cek. We also prove the existence of _(p)-sets for orthogonal systems in noncommutative Lp-spaces, and deduce the corresponding properties for compact quantum groups. Central Sidon sets are also discussed, and it turns out that the compact quantum groups with the same fusion rules and the same dimension functions have identical central Sidon sets. Several examples are also included. The thesis is principally based on two works by the author, entitled “Lp-improvingconvolution operators on finite quantum groups” and “Lacunary Fourier series for compact quantum groups”, which have been accepted for publication in Indiana University Mathematics Journal and Communications in Mathematical Physics respectively

In order to identify the weakest bus in a power system so that the Unified Power Flow Controller could be connected, an investigation of static and dynamic voltage stability is presented. Two stability indices, static and dynamic, have been proposed in the thesis. Multi-Input Multi-Output (MIMO) analysis has been used for the dynamic stability analysis. Results based on the Western System Coordinate Council (WSCC) 3-machine, 9-bus test system and IEEE 14 bus Reliability Test System (RTS) shows that these indices detect with the degree of accuracy the weakest bus, the weakest line and the voltage stability margin in the test system before suffering from voltage collapse. Recently, Flexible Alternating Current Transmission systems (FACTs) have become significant due to the need to strengthen existing power systems. The UPFC has been identified in literature as the most comprehensive and complex FACTs equipment that has emerged for the control and optimization of power flow in AC transmission systems. Significant research has been done on the UPFC. However, the extent of UPFC capability, connected to the weakest bus in maintaining the power flows under fault conditions, not only in the line where it is installed, but also in adjacent parallel lines, remains to be studied. In the literature, it has normally been assumed the UPFC is disconnected during a fault period. In this investigation it has been shown that fault conditions can affect the UPFC significantly, even if it occurred on far buses of the power system. This forms the main contribution presented in this thesis. The impact of UPFC in minimizing the disturbances in voltages, currents and power flows under fault conditions are investigated. The WSCC 3-machine, 9-bus test system is used to investigate the effect of an unsymmetrical fault type and position on the operation of UPFC controller in accordance to the G59 protection, stability and regulation. Results show that it is necessary to disconnect the UPFC controller from the power system during unsymmetrical fault conditions.
Libyan Government

In order to identify the weakest bus in a power system so that the Unified Power Flow Controller could be connected, an investigation of static and dynamic voltage stability is presented. Two stability indices, static and dynamic, have been proposed in the thesis. Multi-Input Multi-Output (MIMO) analysis has been used for the dynamic stability analysis. Results based on the Western System Coordinate Council (WSCC) 3-machine, 9-bus test system and IEEE 14 bus Reliability Test System (RTS) shows that these indices detect with the degree of accuracy the weakest bus, the weakest line and the voltage stability margin in the test system before suffering from voltage collapse. Recently, Flexible Alternating Current Transmission systems (FACTs) have become significant due to the need to strengthen existing power systems. The UPFC has been identified in literature as the most comprehensive and complex FACTs equipment that has emerged for the control and optimization of power flow in AC transmission systems. Significant research has been done on the UPFC. However, the extent of UPFC capability, connected to the weakest bus in maintaining the power flows under fault conditions, not only in the line where it is installed, but also in adjacent parallel lines, remains to be studied. In the literature, it has normally been assumed the UPFC is disconnected during a fault period. In this investigation it has been shown that fault conditions can affect the UPFC significantly, even if it occurred on far buses of the power system. This forms the main contribution presented in this thesis. The impact of UPFC in minimizing the disturbances in voltages, currents and power flows under fault conditions are investigated. The WSCC 3-machine, 9-bus test system is used to investigate the effect of an unsymmetrical fault type and position on the operation of UPFC controller in accordance to the G59 protection, stability and regulation. Results show that it is necessary to disconnect the UPFC controller from the power system during unsymmetrical fault conditions.

У раду је истражен утицај нових модела рада на постигнућа ученика у настави српског језика и књижевности. Теоријски оквири рада усмерени су на разматрање наставних модела: од појмовног одређења, преко врста и подела, до моделовања процеса учења. Истражене су могућности примене осам одабраних нових наставних модела – егземпларног, индивидуализованог, интерактивног, проблемског, програмираног, пројектног, сарадничког и хеуристичког.Како би се испитали ефекти примене нових наставних модела подржаних информационо-комуникационим технологијама (ИКТ) на постигнућа ученика, у односу на традиционални модел, спроведено је експериментално истраживање у четири сомборске средње школе – Средњој техничкој школи, Средњој економској школи, Средњој медицинској школи „Др Ружица Рип“, Гимназији „Вељко Петровић“ и једној кулској школи – Економско-трговинској школи, у другом полугодишту школске 2014/15. године и током школске 2015/16. године на узорку од 1724 ученика из сва четири разреда.Резултати истраживања показују да су ученици у експерименталним групама, у којима су примењени нови наставни модели, имали виша постигнућа у односу на ученике контролних група, односно да су нови наставни модели ефикаснији од традиционалног.Субјекатски положај ученика уз примену индивидуализације и диференцијације у новим наставним моделима, допринели су, уз виша постигнућа ученика и бројне продукте рада, и већој самосталности и ангажованости ученика, интерактивној комуникацији и лакшем препознавању даровитих и креативних ученика.
U radu je istražen uticaj novih modela rada na postignuća učenika u nastavi srpskog jezika i književnosti. Teorijski okviri rada usmereni su na razmatranje nastavnih modela: od pojmovnog određenja, preko vrsta i podela, do modelovanja procesa učenja. Istražene su mogućnosti primene osam odabranih novih nastavnih modela – egzemplarnog, individualizovanog, interaktivnog, problemskog, programiranog, projektnog, saradničkog i heurističkog.Kako bi se ispitali efekti primene novih nastavnih modela podržanih informaciono-komunikacionim tehnologijama (IKT) na postignuća učenika, u odnosu na tradicionalni model, sprovedeno je eksperimentalno istraživanje u četiri somborske srednje škole – Srednjoj tehničkoj školi, Srednjoj ekonomskoj školi, Srednjoj medicinskoj školi „Dr Ružica Rip“, Gimnaziji „Veljko Petrović“ i jednoj kulskoj školi – Ekonomsko-trgovinskoj školi, u drugom polugodištu školske 2014/15. godine i tokom školske 2015/16. godine na uzorku od 1724 učenika iz sva četiri razreda.Rezultati istraživanja pokazuju da su učenici u eksperimentalnim grupama, u kojima su primenjeni novi nastavni modeli, imali viša postignuća u odnosu na učenike kontrolnih grupa, odnosno da su novi nastavni modeli efikasniji od tradicionalnog.Subjekatski položaj učenika uz primenu individualizacije i diferencijacije u novim nastavnim modelima, doprineli su, uz viša postignuća učenika i brojne produkte rada, i većoj samostalnosti i angažovanosti učenika, interaktivnoj komunikaciji i lakšem prepoznavanju darovitih i kreativnih učenika.
In this paper, the effect of new models of work on students` achievement in Serbian language and literature teaching has been investigated. Theoretical frameworks are directed at observing the teaching models – from conceptual defining, over classes and classification to modelling the process of learning. The application possibilities of eight chosen new teaching models have been analysed – exemplary, individualised, interactive, problem- solving, programmed, projected, co-teaching and heuristic.In order to investigate the effects of application of new teaching models supported by information-communication technologies (ICT) on students` achievements when compared to the traditional model, experimental research was carried out in four secondary schools in Sombor – Secondary Technical school, Secondary school of Economics, Secondary Medical school Dr Ruzica Rip, Grammar school Veljko Petrovic and one school in Kula – Secondary school of Economics and Trade during the second term of school year 2014/ 15 and throughout 2015/ 16 on 1724 students in all four years.The results of the survey showed that students in experimental groups, in which new teaching models had been applied, had higher achievements when compared to students in control groups, meaning that new teaching models were more efficient than traditional methods.Subject position of students, in addition to individualisation and differentiation in new teaching models contributed to greater achievements and numerous products of work, greater self- reliance and students` commitment, interactive communication and easier recognition of gifted and creative students.

碩士
國立高雄師範大學
文化創意設計碩士學位學程
106
For many years, researchers intended to investigate the effect of serial position on memory recall. Previous studies mostly examined its causes on primacy effect and recency effect, with the focus on numbers, alphabets and phrases. Some of the researchers even manipulated stimulus like meaningless images, advertisement and smells. However, few discussed isolated stimulus, for instance, colors and sounds. Thus, the purpose of this research is to explore the relation between different colors and the serial position effect.In this study, participants were tested with eight different kinds of color stimulus. Three experimental trials are given as follows: Trial one: Participants were given instruction to recall and confirm colors instantly after the colors were presented. Trial two: Participants were under the recognition task thirty seconds later. Trial three: Participants were processed articulatory suppression while they were recalling memory about colors. For example, they have to keep making “the-the-the” sounds. After the trials, participants were instantly under recognition task again. With the above trials, this study tries to find out the primacy effect and recency effect of the colors. The recall correct rate is plotted in cartesian coordinates, and the horizontal axis is the sequence of items. The result shows stimulus such as colors cause primary effects instead of recency effects. And there are no primary effects and recency effects in Trial three with articulatory suppression. In other words, there is no effect of serial position. This study points out humans recode messages from images to sounds when recalling different colors.

碩士
國立高雄師範大學
工業設計學系
100
Serial position effect is often used to as evidence in dual store memory. The research focuses on visual patterns; this study investigates (1) Whether or not the serial position effects can be observed in visual patterns? (2) Are that differences between visual complexity (simple and complex) in serial position? This study designed meaningless picture of 240 simple concave polygons and 240 complex concave polygons, to form the recognition test. Thirty participants the included, male：11, female：19, the mean age was 31.43 years which ranges from 19 to 60 years old. The results of the study are as follows: 1. There were no serial position effect in simple concave polygon, but have primary effect in complex concave polygons. 2. The visual complexity will affect serial position; even the differences were not significant. The serial position curves of simple concave polygon were a straight light and recency low is conform with previous studies. The serial position curves of complex concave polygon were moderate U-shaped, also conform with previous studies too. Follow studies will needs more empirical results. Need more exploring on 3D graphics, tactile perception, and including the pictures of verbal vocabulary in the future.

碩士
國立臺灣科技大學
自動化及控制研究所
101
This thesis achieves the position control of a serial manipulator. The study objectives are to reduce the steady-state errors by applying several controllers and to compare the performances of these controllers. This thesis includes the following tasks. First of all, the equations of the forward kinematics and the inverse kinematics of the manipulator are derived, and the dynamic model between the joint coordinates of the manipulator and the rotating angles of the motors is established. Secondly, a PID controller and a fuzzy logic controller are implemented. Furthermore, two types of fuzzy-PID controllers are developed and applied to the manipulator. Thirdly, the motion simulations of the manipulator are completed by the software MATLAB/Simulink. For the experimental work, the joint angles of the manipulator are retrieved by the Matlab/Simulink package － xPC Target, and the controllers are implemented in the Micro-Box. Finally, several examples demonstrate the numerical and experimental results by using the aforementioned controllers. The performances of the controllers are examined based on the steady-state errors, the overshoots, the settling time, and the paths of the end-effecter.

Thesis (M.S.)--University of Wisconsin--Madison, 1998.
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The research aimed to explore the potential occurrence of the serial position effect and the own-race bias in facial recognition, and to explore whether these two socio-cognitive psychological phenomena had any influence on each other. Specifically, the researcher suggested that other-race facial recognition will show diminished U-type serial position curves in comparison to own-race facial recognition U-type serial position curves. This was done through a quasi-experimental design, testing 48 participants from an environmental consulting and ground engineering firm in Midrand, Johannesburg. Twelve (12) sets of slides showing either 5 black or 5 white faces were presented to participants, the sequence of faces was randomised and then displayed again to participants. Participants had to identify the original position in which the face was displayed (forcing a serial reconstruction task). Results yielded a U-type serial position curves for overall recognition, with a statistically significant effect for own-race bias effect. Specific interactions indicated that recognition for own-race facial stimuli exhibit clear serial position effect trends, whilst recognition of other-race facial stimuli recognition show increased recognition for the first, middle and last faces in a set. The researcher suggests that the results within this study could be attributed to the effect of an attentional primacy gradient within the Serial Information Processing model. However, further studies are required to eliminate numerous other confounding factors which may have played a role in the study. The results of this research have implications for the judicial system, in which false eyewitness identifications have profound consequences.
Dissertation (MA)--University of Pretoria, 2010.
Psychology
unrestricted

Most prior investigations of visual working memory (VWM) presented the to-be-remembered items simultaneously in a static configuration (e.g., Luck & Vogel, 1997). However, in everyday situations, such as driving on a busy multilane highway, items (e.g., cars) are presented sequentially and must be retained to support later actions (e.g., knowing if it’s safe to change lanes). In a simultaneous presentation, the relative positions of items are apparent but for sequential presentation, relative positions must be inferred in relation to the background structure (e.g., highway lane markings). To examine sequential encoding in VWM, we developed a novel task in which dots were presented slowly, one at a time, with each dot appearing in one of six boxes (Experiment 1), or in invisible boxes within a visible encompassing outer frame (Experiment 2). Experiment 1 found strong recency effects for judgments of color at the end of the sequence but not for the location of dots. In contrast, without dividing lines, Experiment 2 found strong recency effects for both color and location judgments. These results held true for accuracy, reaction time, and an integrated measure of speed and accuracy. We hypothesize that background structure allows the updating of VWM, slotting each new item into that structure to provide a new configuration that retains both old and new items, whereas in the absence of structure, VWM suffers from severe retroactive interference.

I investigate the phonology of prosodic clitics--independent syntactic words not parsed as independent prosodic words--in Bosnian, Serbian, and Croatian. I ask, first, how clitics are organized into prosodic structures, and second, how this is determined by the grammar. Following Zec (1997, 2005), I look at several clitic categories, including negation, prepositions, complementizers, conjunctions, and second-position clitics. Based on a reanalysis of word accent (Browne and McCawley 1965, Inkelas and Zec 1988, Zec 1999), I argue that in some cases where a preposition, complementizer, or conjunction fails to realize accent determined by a following word, it is not a proclitic-- that is, prosodified with the following word--but rather a free clitic parsed directly by a phonological phrase. Conversely, the second-position clitics are not always enclitic--that is, prosodified with a preceding word--but are sometimes free. Their second-position word order results not from enclisis, but from the avoidance of free clitics at phrase edges, where they would interfere with the alignment of phonological phrases to prosodic words. Regarding the determination of clisis by the grammar, I argue for an interface constraint approach (Selkirk 1995, Truckenbrodt 1995), whereby prosodic structures are built according to general constraints on their well-formedness, and on their interface to syntactic structures. I contrast this with the subcategorization approach , which sees clisis as specified for each clitic (Klavans 1982, Radanovic-Kocic 1988, Zec and Inkelas 1990). The comparison across clitic categories provides key support for the interface constraint approach, showing that their prosody depends on their syntactic configurations and phonological shapes, rather than on arbitrary subcategorizations. Prosodic differences across categories are a derivative effect of their configuration in the clause, and of the division of the clause into phonological phrases. The relevance of phonological phrases consists in how their edges discourage some kinds of clisis, blocking, for example, proclisis of complementizers and conjunctions to their complements. Free clisis is disfavored at phrase edges, producing the second-position effect. Thus, the interface constraint approach leads to a unified account of word, phrase, and clitic prosody.

The prevalence and the incidence are two primary epidemiological parameters in infectious disease modelling. The incidence is also closely related to the force of infection or the hazard of infection in survival analysis terms. The two measures carry the same information about a disease because they measure the rate at which new infections occur. The disease prevalence gives the proportion of infected individuals in the population at a given time, while the incidence is the rate of new infections. The thesis discusses methods for estimating HIV prevalence, incidence rates and the force of infection, against age and time, using cross-sectional seroprevalence data for pregnant women attending antenatal clinics. The data was collected on women aged 12 to 47 in rural KwaZulu-Natal for each of the years 2001 to 2006. The generalized linear model for binomial response is used extensively. First the logistic regression model is used to estimate annual HIV prevalence by age. It was found that the estimated prevalence for each year increases with age, to peaks of between 36% and 57% in the mid to late twenties, before declining steadily toward the forties. Fitted prevalence for 2001 is lower than for the other years across all ages. Several models for estimating the force of infection are discussed and applied. The fitted force of infection rises with age to a peak of 0.074 at age 15, and then decreases toward higher ages. The force of infection measures the potential risk of infection per individual per unit time. A proportional hazards model of the age to infection is applied to the data, and shows that additional variables such as partner’s age and the number of previous pregnancies do have a significant effect on the infection hazard. Studies for estimating incidence from multiple prevalence surveys are reviewed. The relative inclusion rate (RIR), accounting for the fact that the probability of inclusion in a prevalence sample depends on the individual’s HIV status, and its role in incidence estimation is discussed as a possible future approach of extending the current work.
Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2011.