O Brasil que não é bem assim: representações do Brasil na cobertura da Copa do Mundo 2014 pelo jornal The Guardian

Pós-graduação em Comunicação - FAAC

A New Control Architecture for Robust Controllers in Rear Electric Traction Passenger HEVs

It is well known that control systems are the core of electronic differential systems (EDSs) in electric vehicles (EVs)/hybrid HEVs (HEVs). However, conventional closed-loop control architectures do not completely match the needed ability to reject noises/disturbances, especially regarding the input acceleration signal incoming from the driver's commands, which makes the EDS (in this case) ineffective. Due to this, in this paper, a novel EDS control architecture is proposed to offer a new approach for the traction system that can be used with a great variety of controllers (e. g., classic, artificial intelligence (AI)-based, and modern/robust theory). In addition to this, a modified proportional-integral derivative (PID) controller, an AI-based neuro-fuzzy controller, and a robust optimal H-infinity controller were designed and evaluated to observe and evaluate the versatility of the novel architecture. Kinematic and dynamic models of the vehicle are briefly introduced. Then, simulated and experimental results were presented and discussed. A Hybrid Electric Vehicle in Low Scale (HELVIS)-Sim simulation environment was employed to the preliminary analysis of the proposed EDS architecture. Later, the EDS itself was embedded in a dSpace 1103 high-performance interface board so that real-time control of the rear wheels of the HELVIS platform was successfully achieved.

GaMnAs: Position of Mn-d levels and majority spin band gap predicted from GGA-1/2 calculations

Among all magnetic semiconductors, GaMnAs seems to be the most important one. In this work, we present accurate first-principles calculations of GaMnAs within the GGA-1/2 approach: We concentrate our efforts in obtaining the position of the peak of Mn-d levels in the valence band and also the majority spin band gap. For the position of the Mn-d peak, we find a value of 3.3 eV below the Fermi level, in good agreement with the most recent experimental results of 3.5 and 3.7 eV. An analytical expression that fits the calculated E-g(x) for majority spin is derived in order to provide ready access to the band gap for the composition range from 0 to 0.25. We found a value of 3.9 eV for the gap bowing parameter. The results agree well with the most recent experimental data. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718602]

A Design Methodology for Computer Security Testing

The field of "computer security" is often considered something in between Art and Science. This is partly due to the lack of widely agreed and standardized methodologies to evaluate the degree of the security of a system. This dissertation intends to contribute to this area by investigating the most common security testing strategies applied nowadays and by proposing an enhanced methodology that may be effectively applied to different threat scenarios with the same degree of effectiveness. Security testing methodologies are the first step towards standardized security evaluation processes and understanding of how the security threats evolve over time. This dissertation analyzes some of the most used identifying differences and commonalities, useful to compare them and assess their quality. The dissertation then proposes a new enhanced methodology built by keeping the best of every analyzed methodology. The designed methodology is tested over different systems with very effective results, which is the main evidence that it could really be applied in practical cases. Most of the dissertation discusses and proves how the presented testing methodology could be applied to such different systems and even to evade security measures by inverting goals and scopes. Real cases are often hard to find in methodology' documents, in contrary this dissertation wants to show real and practical cases offering technical details about how to apply it. Electronic voting systems are the first field test considered, and Pvote and Scantegrity are the two tested electronic voting systems. The usability and effectiveness of the designed methodology for electronic voting systems is proved thanks to this field cases analysis. Furthermore reputation and anti virus engines have also be analyzed with similar results. The dissertation concludes by presenting some general guidelines to build a coordination-based approach of electronic voting systems to improve the security without decreasing the system modularity.

Il sarto tra Medioevo e prima Età moderna a Bologna e in altre città dell’Emilia Romagna

Il lavoro di Elisa Tosi Brandi riguarda il mestiere del sarto nel basso Medioevo e si sviluppa utilizzando due prospettive differenti. Da un lato, infatti, si è deciso di seguire una tradizione di studi oramai consolidata, che privilegia l’indagine degli aspetti economici e politici, dall’altro si è scelto di non trascurare la storia dei prodotti degli artigiani. L’approccio utilizzato in questa tesi tiene insieme entrambe le prospettive di ricerca, tentando dunque di indagare i produttori e i prodotti così come le fasi e i metodi di lavoro. Ciò senza ignorare, da un lato, indagini di tipo politico, economico e sociale, poiché tali oggetti sono lo specchio della società che li ha ideati e creati e da cui non si può prescindere e, dall’altro, indagini di tipo tecnico, poiché gli oggetti sono rivelatori del complesso patrimonio di conoscenze artigianali. Partendo dal caso di studio della Società dei sarti della città di Bologna, la tesi di Elisa Tosi Brandi ricostruisce questo mestiere confrontando tra loro fonti inedite (statuti corporativi, matricole, estimi) e studi effettuati su altre aree italiane. La ricca documentazione conservata ha consentito di mettere in luce l’organizzazione di questo lavoro, di collocare abitazioni e botteghe nell’area del mercato e nel più ampio tessuto cittadino, di individuare i percorsi commerciali e di approvvigionamento. L’ultima parte della tesi offre l’analisi di alcune fonti materiali al fine di ricostruire le tecniche sartoriali medievali intrecciando tutte le fonti consultate: dai documenti scritti si passa pertanto agli abiti che offrono informazioni dirette sulle tecniche di taglio ed assemblaggio.

L'evoluzione poetica delle Grazie di Ugo Foscolo. Un'ipotesi di commento.

Il presente progetto di ricerca propone l’esegesi di alcune sezioni delle Grazie di Ugo Foscolo, secondo l’Edizione Nazionale (1985), a cura di Pagliai-Scotti. È stato fornito il commento delle seguenti sezioni: Prima redazione dell’Inno, Seconda redazione dell’Inno e Appendice alla Seconda redazione dell’Inno, Versi del Rito, Quadernone, Stesure milanesi: Viaggio delle api e frammenti sparsi. Tutte le stesure della Prima redazione dell’Inno e alcuni frammenti delle Stesure milanesi non erano mai stati commentati fino ad ora. Il commento offre una ricostruzione dell’intertesto delle Grazie – le fonti letterarie, erudite e figurative –, e punta alla storicizzazione e alla contestualizzazione della poesia di Foscolo. Attraverso lo studio dei frammenti nella loro evoluzione è possibile intendere come i tre inni, diventati uno soltanto nella redazione del Quadernone, rappresentino la sintesi di tutto il sapere e gli interessi foscoliani (eruditi, scientifici, filosofico-estetici e letterari), e come essi, sin dai primi esiti poetici, siano specchio delle esperienze biografiche dell’autore. Il commento proposto nella tesi ribadisce la complessità della poesia delle Grazie, nelle sue componenti civili e didattiche. Esso avanza nuovi e importanti spunti di indagine, ponendosi come viatico indispensabile per un futuro commento integrale.

Is There a Net Gener in the House? Dispelling a Mystification

The subject of this essay is the so-called ‘net generation’, the ‘generation @’, or the ‘millennials’ and the speculations about the importance of this generation for teaching. This essay represents both a critical analysis of such allegations and assumptions and a discourse, from the perspective of socialization, on the use of media in teaching.

IT-KompetenzBarometer

Die kurzen Technologiezyklen in der IT-Industrie stellen Unternehmen vor das Problem, Mitarbeiter zeit- und themenadäquat weiter zu qualifizieren. Für Bildungsanbieter erwächst damit die Herausforderung, relevante Bildungsthemen möglichst frühzeitig zu identifizieren, ökonomisch zu bewerten und ausgewählte Themen in Form geeigneter Bildungsangebote zur Marktreife zu bringen. Zur Handhabung dieser Problematik wurde an der Hochschule für Telekommunikation Leipzig (HfTL), die sich in Trägerschaft der Deutsche Telekom AG befindet, ein innovatives Analyseinstrument entwickelt. Mit diesem Instrument, dem IT-KompetenzBarometer, werden Stellenanzeigen, die in Jobportalen online publiziert werden, ausgelesen und mithilfe von Text Mining-Methoden untersucht. Auf diese Weise können Informationen gewonnen werden, die differenzierte Auskunft über die qualitativen Kompetenzanforderungen zentraler Berufsbilder des IT-Sektors liefern. Dieser Beitrag stellt Ergebnisse vor, die durch Analyse von mehr als 40.000 Stellenanzeigen für IT-Fachkräfte aus Jobportalen im Zeitraum von Juni-September 2012 gewonnen werden konnten. Diese Ergebnisse liefern eine Informationsgrundlage, um marktrelevante Bildungsthemen zu identifizieren, sodass Bildungsangebote erfolgreich gestaltet und weiterentwickelt werden können.

Data quality of animal health records on Swiss dairy farms

High-quality data are essential for veterinary surveillance systems, and their quality can be affected by the source and the method of collection. Data recorded on farms could provide detailed information about the health of a population of animals, but the accuracy of the data recorded by farmers is uncertain. The aims of this study were to evaluate the quality of the data on animal health recorded on 97 Swiss dairy farms, to compare the quality of the data obtained by different recording systems, and to obtain baseline data on the health of the animals on the 97 farms. Data on animal health were collected from the farms for a year. Their quality was evaluated by assessing the completeness and accuracy of the recorded information, and by comparing farmers' and veterinarians' records. The quality of the data provided by the farmers was satisfactory, although electronic recording systems made it easier to trace the animals treated. The farmers tended to record more health-related events than the veterinarians, although this varied with the event considered, and some events were recorded only by the veterinarians. The farmers' attitude towards data collection was positive. Factors such as motivation, feedback, training, and simplicity and standardisation of data collection were important because they influenced the quality of the data.

Accuracy and self correction of information received from an internet breast cancer list: content analysis.

OBJECTIVES: To determine the prevalence of false or misleading statements in messages posted by internet cancer support groups and whether these statements were identified as false or misleading and corrected by other participants in subsequent postings. DESIGN: Analysis of content of postings. SETTING: Internet cancer support group Breast Cancer Mailing List. MAIN OUTCOME MEASURES: Number of false or misleading statements posted from 1 January to 23 April 2005 and whether these were identified and corrected by participants in subsequent postings. RESULTS: 10 of 4600 postings (0.22%) were found to be false or misleading. Of these, seven were identified as false or misleading by other participants and corrected within an average of four hours and 33 minutes (maximum, nine hours and nine minutes). CONCLUSIONS: Most posted information on breast cancer was accurate. Most false or misleading statements were rapidly corrected by participants in subsequent postings.

Persuasive email messages for patient communication.

To improve health and reduce costs, we need to encourage patients to make better health care decisions. Since email is widely available, it may be useful for patient-directed interventions. However, we know little about how the contents of an email message can influence a health-related decision. We propose a model to understand how patients may process persuasive email messages.

Can prospective usability evaluation predict data errors?

Increasing amounts of clinical research data are collected by manual data entry into electronic source systems and directly from research subjects. For this manual entered source data, common methods of data cleaning such as post-entry identification and resolution of discrepancies and double data entry are not feasible. However data accuracy rates achieved without these mechanisms may be higher than desired for a particular research use. We evaluated a heuristic usability method for utility as a tool to independently and prospectively identify data collection form questions associated with data errors. The method evaluated had a promising sensitivity of 64% and a specificity of 67%. The method was used as described in the literature for usability with no further adaptations or specialization for predicting data errors. We conclude that usability evaluation methodology should be further investigated for use in data quality assurance.

¿Incluir las diferencias o a los diferentes? Una cuestión mal planteada en una realidad desoladora

Este texto se plantea una relectura ética acerca del derecho a la educación de las personas con discapacidades, con un énfasis prioritario de la situación en América Latina. A partir de considerar los sistemas jurídicos, los modos de financiamiento políticos, los porcentajes de inclusión y los programas de seguimiento de la población con discapacidad en edad escolar, se deriva toda una serie de discusiones sobre la idea de formación educativa, el estar junto a otros y las responsabilidades éticas en la tarea de educar.

¿Incluir las diferencias? Sobre un problema mal planteado y una realidad insoportable

Este texto se plantea una relectura ética acerca del derecho a la educación de las personas con discapacidades, con un énfasis prioritario de la situación en América Latina. A partir de considerar los sistemas jurídicos, los modos de financiamiento políticos, los porcentajes de inclusión y los programas de seguimiento de la población con discapacidad en edad escolar, se deriva toda una serie de discusiones sobre la idea de formación educativa, el estar junto a otros y las responsabilidades éticas en la tarea de educar.