Ce travail concerne l'étude et la réalisation de stratégies d'auto-test intégrées pour VCO radiofréquence (RF). La complexité des circuits intégrés RF devient un obstacle pour la mesure des principaux blocs RF des chaines de transmission/réception. Certains nœuds ne sont pas accessibles, l'excursion en tension des signaux baisse et les signaux haute fréquence ne peuvent pas être amenés à l'extérieur de la puce sans une forte dégradation. Le s techniques habituelles de test deviennent très couteuses et lentes. Le test pour le wafer-sort est étudié en premier. La solution proposée est la mise en œuvre d'une stratégie d'auto-test intégrée (BIST) qui puisse discriminer entre circuits sans fautes et circuits avec fautes pendant le wafer-test. La méthodologie utilisée est le test structurel. La couverture des fautes est étudiée pour connaitre la quantité à capter au niveau intégré afin de maximiser la probabilité de trouver tous les défauts physiques dans le VCO. Le résultat de cette analyse montre que la couverture des fautes est maximisée quand la tension crête-crête en sortie du VCO est captée. La caractérisation complète (validation de la puce et process-monitoring) du VCO est étudiée dans la deuxième étape. Les informations à extraire de la puce sont: amplitude des signaux, consommation du VCO, fréquence d'oscillation, gain de conversion (Kvco) et une information à propos du bruit de phase. Un démonstrateur pour le test au niveau wafer est réalisé en technologie ST CMOS 65nm. Le démonstrateur est composé d'un VCO 3.5GHz (le circuit sous test), un LDO, une référence de tension indépendante de température et variations d'alimentation, un capteur de tension crête-crête et un comparateur. Le capteur Vpp donne en sortie une information DC qui est comparée avec une plage de valeurs acceptables. Le BIST donne en sortie une information numérique pass/fail. / This work deals with the study and the realization of Built-In Self-Tests (BIST) for RF VCOs (Voltage Controlled Oscillators) The increasing complexity of RF integrated circuits is creating an obstacle for the correct measurement of the main RF blocks of any transceiver. Some nodes are not accessible, the voltage excursion of the signals is getting lower and lower and high frequency signals cannot be driven off the die without a main degradation. The common test techniques become then very expensive and time consuming. The wafer sort is firstly approached. The proposed solution is the implementation of a BIST strategy able to discriminate between faulty and good circuits during the wafer test. The chosen methodology is the structural test (fault-oriented). A fault coverage campaign is carried out in order to find the quantity to monitor on-chip that maximizes the probability to find all possible physical defects in the VCO. The result of the analysis reveals that the fault coverage is maximized if the peak-to-peak output voltage is monitored. The complete on-chip characterization of the VCO is then addressed, for chip validation and process monitoring. The information that need to be extracted on-chip concern: amplitude of the signal, consumption of the VCO, frequency of oscillation, its conversion gain (voltage-to-frequency) and eventually some information on the phase noise. A silicon demonstrator for wafer sort purposes is implemented using the ST CMOS 65nm process. It includes a 3.5GHz VCO, an LDO, a temperature and supply-voltage independent voltage reference, a peak-to-peak voltage detector and a comparator. The Vpp detector outputs a DC-voltage that is compared to a predefined acceptance boundary. A logic pass/fail signal is output by the BIST. The attention is then turned to the study of the proposed architecture for an on-chip frequency-meter able to measure the RF frequency with high accuracy. Behavioral simulations using VHDL-AMS lead to the conclusion that a TDC (Time-to-Digital Converter) is the best solution for our goal. The road is then opened to the measure of long-time jitter making use of the same TDC.

Batch experiments have been used to assess the sorption properties of a potential repository backfill, NRVB (Nirex Reference Vault Backfill). In this study, UO22+, Eu3+, Am3+ and Th4+ have been used as model radionuclides and ethylenediaminetetraacetic acid (EDTA), isosaccharinic acid (ISA) and humic acid (HA) as competing ligands. The NRVB is an effective scavenger of all radionuclides, with the majority sorbed within minutes. Ultrafiltration showed that for solutions of U in contact with NRVB, for the small amount of U remaining in solution, nearly all (79 %) was present as clusters or colloidal material in a very narrow and relatively small size range (0.9 – 1.4 nm); for Eu (> 94 %) is attached to large NRVB derived colloids or particulates; for Th (82 %) is present in the true solution; whilst for Am 58 % is in the true solution. High concentrations of EDTA (>0.01 M) were able to reduce the extent of sorption at apparent equilibrium for all metal ions. ISA was very effective as a competing ligand for all metal ions, generally at a lower concentration than EDTA in equivalent systems. Humic acid was found to be ineffective as a competing ligand at any realistic concentration. In all systems, there was evidence of significant irreversibility, with concentrations of EDTA and ISA that were able to prevent sorption unable to remove radionuclides from contaminated NRVB. For the uranyl systems, luminescence spectroscopy was used to analyse the mechanism of sorption. For CSH (calcium silicate hydrate), the spectra were consistent with surface complexation, followed by some degree of incorporation. For NRVB, the spectrum was dominated by a feature that was similar to uranyl sorbed to CSH as a surface complex and/or incorporated into the structure. There was also a minor component that was assigned as a calcium uranate like surface precipitate. The sorption data were fitted with a simple surface complexation model, which had a single surface binding site. The modelling showed that the uptake of all radionuclides is consistent with surface complexation or surface precipitation. The model was less effective at predicting the effects of the competing ligands on sorption. Thermodynamic speciation and surface complexation modelling were able to explain the behaviour in the systems qualitatively, but cannot be used to predict sorption absolutely.

A long-standing antipathy towards genealogists on the part of archivists is suggested by a study of the archival literature. However, there is evidence in the literature of the past decade to indicate that many archivists are reassessing their position vis a vis genealogists. There appears to be several causes. Social historians and other professionals also acknowledge that genealogical endeavours are helpful to their own purposes. Genealogists themselves recognize that their qualifications and standards must be improved in order for them to command respect. Archivists now recognize the lobbying power that can be exercised by this large user constituency. The literature suggests that all these influences are leading archivists to accept the principle that genealogy and genealogists should receive service and respect that is equal to that afforded academic and other researchers. Interviews with seven archivists at three Canadian provincial archives were conducted. They suggest that different archivists hold different attitudes towards genealogists. One interviewee was clearly antipathetic, but three were impartial and three were frustrated and discouraged, not with genealogists per se, but with the problems inherent in putting the principle of equality into practice. Regardless of the attitude held, each interviewee believed that an improvement in methods of accommodating genealogists would not only aid the genealogist, but would also provide some relief from the pressures of serving this large and varied user constituency. But does such accommodation through adjustments in the functions of appraisal and acquisition, arrangement and description, reference and access, and public programming undermine archival theory? In general, it was found that sound appraisal practices are compromised by an approach driven by the needs of the user; however, genealogical research required no adjustment of arrangement and description practices following the principles of provenance and original order. It was also found that the functions of reference and access, and public programming could meet the needs and approaches of genealogists without jeopardizing the physical and intellectual aspects of the records. / Arts, Faculty of / Library, Archival and Information Studies (SLAIS), School of / Graduate

Orientador: Edson Françozo / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Estudos da Linguagem / Made available in DSpace on 2018-08-24T10:24:06Z (GMT). No. of bitstreams: 1 Godoy_MahayanaCristina_D.pdf: 4933990 bytes, checksum: c592273bb1019af254798b4a660fb45a (MD5) Previous issue date: 2014 / Resumo: Tradicionalmente, o estudo do processamento das expressões pronominais sempre partiu do pressuposto de que o processador, ao ser confrontado com um pronome, inicia uma busca imediata por um antecedente. Esse ponto de vista guiou boa parte dos vários estudos sobre pronomes singulares (e.g., Arnold et al., 2000; Sturt, 2003) e, também, os poucos estudos feitos sobre o processamento de pronomes plurais (e.g., Oakhill et al., 1992). Nesse trabalho, apresentamos casos de pronomes plurais não-anafóricos que desafiam essa visão incremental, como em "Alice gostava de comer carne, e eles faziam uma picanha suculenta na churrascaria do Leblon". Nesse caso, só é possível alcançar a referência do pronome plural ao final da sentença, quando se chega à expressão "churrascaria do Leblon". Esses casos nos levam a questionar (i) se pronomes plurais, assim como os singulares, se ligam imediatamente a um antecedente provido pelo contexto; (ii) se o processamento de pronomes plurais depende de um antecedente explícito ou inferível no contexto para que possa ocorrer sem custos cognitivos adicionais. Em um primeiro experimento de leitura feito por meio de rastreamento ocular, testamos com que rapidez pronomes plurais e singulares constroem uma relação correferencial com um antecedente explícito no contexto anterior. Os resultados indicam que pronomes singulares estabelecem uma relação imediata de correferência, e a revogação essa relação implica custo cognitivo comparativamente a contextos em que a correferência é mantida. Pronomes plurais, por outro lado, parecem não se ligar de imediato com seu suposto antecedente, o que faz com que situações de revogação de correferência não resultem em um custo adicional de processamento. Em um segundo experimento, testamos quão necessários são esses antecedentes para que pronomes plurais e singulares sejam lidos sem custo adicional. Pronomes singulares que não tinham um antecedente explícito no contexto anterior levaram a um maior tempo de leitura do que pronomes singulares que mantinham relação de correferência com um antecedente. Por outro lado, pronomes plurais sem antecedente não foram cognitivamente mais custosos em comparação a pronomes plurais que contavam com um antecedente explícito no contexto. Levando em conta os processos de resolução pronominal, concluímos que nossos resultados não corroboram o pressuposto de que pronomes plurais e singulares sigam a mesma estratégia de resolução. Como pronomes plurais tendem a depender de informações apresentadas posteriormente no texto, sua resolução pode ser adiada sem acarretar custo processual. Além disso, como nossos dados sugerem que pronomes plurais podem permanecer sem resolução por um período de tempo, os resultados descritos parecem indicar que o processamento linguístico pode se pautar por representações superficiais do input linguístico em algumas situações específicas / Abstract: The study of pronoun resolution has traditionally relied on the presupposition that the parser starts searching for an antecedent as soon as it is confronted with a pronoun. This view has guided most of the large amount of work on the processing of singular pronouns (e.g. Arnold et al., 2000; Sturt, 2003) as well as the scarce work that has been done on the resolution of plural pronouns (e.g., Oakhill et al., 1992). Here, we study some occurrences of plural pronouns that seem to defy such an incremental view, as in "Alice used to eat beef everyday, and they usually prepared a delicious New York strip at the steakhouse". In this text, a referent for the plural pronoun "they" is inferred through the locative "at the steakhouse", but it is not until the end of the sentence that the reader has this information. These observations raise the questions of (i) whether plural pronouns create an immediate co-referential relation with a possible antecedent and (ii) whether processing plural pronouns really requires an antecedent by the time these expressions are read. In an eye-tracker experiment, we tested how quickly singular and plural pronouns build a co-referential link with a referent that was explicit in a previous sentence. Our results show that singular pronouns are immediately read as co-referential to their antecedent, and canceling this co-reference evokes a greater cost in comparison to situations in which the co-reference is kept through the whole sentence. On the other hand, plural pronouns does not seem to create such an immediate relation with its supposed antecedent, and canceling the co-reference does not result in extra processing cost. In a self-paced reading task, we tested how crucial it was for the processing of plural and singular pronouns that these expressions had an antecedent. Singular pronouns with no antecedent showed greater reading times in comparison to pronouns that had an antecedent. Reading times for plural pronouns were the same regardless of the presence of an antecedent. From the perspective of pronoun processing, we can conclude that the results described above do not fit the presupposition that singular and plural pronoun processing follow the same resolution strategy. Because plural pronouns may depend on information presented later in the discourse, its resolution may be delayed without causing extra processing cost. Furthermore, because our data suggest that plural pronouns may continue unresolved, these results may also be interpreted as evidence that language processing, in specific situations, may rely on superficial representations of discourse structure / Doutorado / Linguistica / Doutora em Linguística

Sistemas embarcados, inclusive para eletrônica de consumo, vêm se tornando cada vez mais complexos, requerendo a utilização de novas tecnologias, bem como novas abordagens para o seu desenvolvimento. Em particular, o desenvolvimento de aplicações para TV Digital interativa têm requerido crescente aplicação de novas técnicas de programação e engenharia de software, visando facilitar o desenvolvimento e manutenção desses sistemas. Em paralelo, arquiteturas de referência, um tipo especial de arquitetura de software, têm sido proposta para diversos domínios de aplicação e têm contribudo efetivamente para o desenvolvimento, padronização e evolução de sistemas de software de tais domínios. Contudo, o uso de arquiteturas de referência ainda não foi explorado em profundidade no desenvolvimento de aplicações para o domínio de TV Digital. Nesse contexto, o principal objetivo desse trabalho e propor uma arquitetura de referência para o domínio de TV Digital interativa, que facilite o desenvolvimento de aplicações para o ambiente procedural do middleware para o receptor digital. Como principais resultados alcançados neste trabalho, têm-se a contribuição para a área de TV Digital, buscando promover essa área que têm se destacado consideravelmente nos últimos anos / Embedded systems, especially in consumer electronics, are becoming increasingly complex, requiring the use of new technologies and approaches for their development. In particular, the development of interactive applications for digital TV requires new programming techniques and software engineering practices in order to facilitate the reliability and maintenance of these systems. In a parallel perspective, reference architectures, an special type of software architecture, have been proposed for several applications domain and have effectively contributed to the development, standardization, and evolution of software systems on such domains. However, the use of reference architectures has not been in depth explored in the digital TV domain. In this context, this work proposes a reference architecture for this domain. This architecture enables the development of applications for the procedural middleware environment for the digital TV receiver. The main result achieved in this work is the contribution to the development of interactive TV middleware-based applications, aiming at promoting this area that has been substantially explored in recent years

We conducted three experiments to better understand how mothers structure their input to young children for finding hidden objects and how young children use this input to guide their searches. We examined the reference frames and spatial terms mothers use to communicate with their 2.5-, 3.0-, and 3.5-year-old children about location by asking mothers to verbally disambiguate a target hiding container from an identical non-target hiding container for their child. We varied the relative proximity of the target and non-target containers to a landmark and to the mother and child. The target and non-target containers were on opposite sides of the landmark in Experiment 1 and on the same side of the landmark in Experiments 2 and 3. The absolute distance of the containers from the landmark was increased in Experiment 3, while the relative distance of the containers to the landmark and to the mother and child remained the same. In all of the experiments, mothers' reference frame use was governed by the relative proximity of the target and non-target containers to the landmark and themselves. Older children followed directions more successfully than did younger children. The Discussion focuses on how the age of the child and the characteristics of the task shape maternal spatial communication.

This design covers the design of an integrated circuit (IC) in support of the active contact lens project at Cal Poly. The project aims to monitor intraocular eye pressure (IOP) to help diagnose and treat glaucoma, which is expected affect 6.3 million Americans by 2050. The IC is designed using IBM’s 130 nm 8RF process, is powered by an on-lens thin film 3.8 V rechargeable battery, and will be fabricated at no cost through MOSIS. The IC features a low-power linear regulator that powers a current-starved voltage-controlled oscillator (CSVCO) used for establishing a backscatter communication link. Additional circuitry is included to regulate power to and from the battery. An undervoltage lockout circuit protects the battery from deep discharge damage. When recharging, a rectifier and a voltage regulator provides overvoltage protection. These circuit blocks are biased primarily using a 696 mV subthreshold voltage reference that consumes 110.5 nA.

This work deals with principles of design low noise bandgap reference using multiple in the process EPI92. The voltage reference is described and theoretic analysis noise performances is made. Results are compared with measured data realized breadboard BG reference and fabricated low drop-out regulators, which using different accurate bandgap references cells.

The purpose of this dissertation is to examine aspects of the representational and computational influences on Bayesian reasoning as they relate to reference dependence. Across three studies, I explored how dependence on the initial problem structure influences the ability to solve Bayesian reasoning tasks. Congruence between the problem and question of interest, response errors, and individual differences in numerical abilities was assessed. The most consistent and surprising finding in all three experiments was that people were much more likely to utilize the superordinate value as part of their solution rather than the anticipated reference class values. This resulted in a weakened effect of congruence, with relatively low accuracy even in congruent conditions, as well as a different pattern of response errors than what was anticipated. There was consistent and strong evidence of a value selection bias in that incorrect responses almost always conformed to values that were provided in the problem rather than errors related to computation. The one notable exception occurred when no organizing information was available in the problem, other than the instruction to consider a sample of the same size as that in the problem. In that case, participants were most apt to sum all of the subsets of the sample to yield the size of the original sample (N). In all three experiments, higher numerical skills were generally associated with higher accuracy, whether calculations were required or not.

Maps are increasingly being used in traditional and virtual media, and civic discourse on political, social, and environmental issues, among others, is more and more becoming influenced by them. The often-used expression of a “picture tells a 1000 words” has never been so apt in our progressively more visual world. Despite this increased role and importance of maps, map literacy, as a field of research, remains rather underdeveloped. This is especially so for thematic maps, the very type of map that is finding increasing currency in discourse. As part of this under-developed nature of map literacy, the quantitative skills used in map reading and interpretation have not been systematically investigated, and previous commentary on the subject has been limited to listings of relatively low-level skills. As modern technologies, such as GIS, enable the more sophisticated production of maps, their interpretation can come to depend on more advanced quantitative literacy. The quantitative literacy required for map interpretation can also be expected to vary significantly with the type of map, and while map literacy studies generally recognize the broad distinction of reference and thematic maps, they do not provide a more nuanced framework for investigating how quantitative literacy may vary both within these broad categories and for maps which overlap these categories. This dissertation represents a first attempt to address these issues, and at least provide conceptual frameworks for their investigation. For the first conceptual framework, the dissertation introduces a three-set Venn model to discuss the content and relationships of three “literacies”: map literacy, quantitative literacy, and background information. As part of this, the field of Quantitative Map Literacy (QMP) is introduced and defined as the knowledge (concepts, skills and facts) required to accurately read, use, interpret, and understand the quantitative information embedded in geographic backgrounds. It is conceptualized as the intersection of the Map Literacy and Quantitative Literacy “sets”. The dissertation also introduces the conceptual framework of a compositional triangle based on the ratio of reference to thematic map purpose and the level of generalization/distortion within maps. This framework allows for any type of map to be located within the triangle and then related to the type and level of quantitative literacy they demand. Finally, based on these two frameworks, the dissertation uses the pedagogical tool of “word problems” to explore the variability of map reading skills and knowledge, and does this for specific map examples.