7,997 research outputs found
Stratégie d'adaptation de liens sur canaux radios dynamiques pour les communications entre véhicules (Optimisation de la qualité de service)
No full textCette thèse traite de l'optimisation des communications dans les réseaux véhiculaires à l'aide d'une plate-forme de simulation réaliste. Un environnement réaliste implique des modèles de mobilité adaptés aux véhicules ainsi que des modèles de couche physique détaillés (modèles decanaux et chaîne de transmission numérique). Notre travail a d'abord consisté à concevoir une plate-forme de simulation réaliste dédiée aux VANETs (Vehicular Ad hoc NETworks). Cette plate-forme a été complétée par un modèle de propagation semi-déterministe que nous avons conçu. L'avantage de ce modèle, appelé UMCRT, est d'avoir un réalisme équivalent à un modèle déterministe tout en réduisant significativement le temps de calcul. Ce modèle a été validé par comparaison avec unsimulateur déterministe à tracé de rayons.Nous avons ensuite utilisé cette plate-forme pour évaluer des protocoles de routage.L'efficacité de ces différents protocoles ad hoc testés en conditions réalistes nous a permis defocaliser notre étude sur les protocoles réactifs. De cette évaluation, nous avons retenu AODV (Ad hoc On demand Distance Vector) auquel nous avons notamment appliqué une métrique cross layer pour pallier la baisse de performance induite par le réalisme. Nous avons ensuite utilisé une technique de tuning appliquée à des protocoles réactifs. Finalement, nous avons évalué différentes couches physiques, SISO (Simple Input Simple Output) et MIMO (Multiple Imput Multiple Output). Ces travaux montrent que seules des améliorations combinées à différents niveaux (physique et réseau) permettraient d'apporter une amélioration significative des performances.This thesis deals with the optimization of communications in vehicular networks by using arealistic simulation platform. A realistic environment implies the usage of mobility modelsadapted to vehicles and also highly detailed physical models (channel models and digital transmission chain). The first part of our work has consisted in the design of a realistic simulation platformdedicated to VANETs (Vehicular Ad hoc NETworks). This platform has been completed by a semi-deterministic propagation model which we have designed. This model called UM-CRThas the advantage to have the same level of realism than a deterministic model while requiringmuch less computation time. This model has been validated by comparison with a deterministicray tracing simulator. We then have used this platform to evaluate routing protocols. The efficiency of different adhoc routing protocols in realistic conditions has led us to focus our study on the family of reactive protocols. From this evaluation we have selected AODV (Ad hoc On demand Distance Vector) to which we have applied a cross-layer metric in order to reduce the performance degradation caused by the realistic environment. We then have used a tuning technique with reactive protocols. Finally, we have evaluated several SISO and MIMO physical layers. This work shows that only improvements combined at different levels (physicaland network) can yield a significant increase in performance.POITIERS-SCD-Bib. électronique (861949901) / SudocSudocFranceF
Jonathan Ned Katz Author Event: The Daring Life and Dangerous Times of Eve Adam
No full text“The Daring Life and Dangerous Times of Eve Adams,” interview with author, Jonathan Ned Katz, moderated by Emily Weiner (WWU) and organized by Congregation Beth Israel
Contemporary Literature. Analysis of Jonathan Bazzi's novels
No full textopenDopo una breve panoramica della letteratura italiana degli ultimi vent’anni si analizzano i due romanzi di Jonathan Bazzi "Febbre" e "Corpi minori" dai punti di vista formale, stilistico e tematico. Si discute inoltre il rapporto tra social media, autofiction e autore; nel capitolo 4 si riporta l'intervista che Bazzi ci ha gentilmente concesso, in cui questi argomenti vengono ripresi.
Si individuano alcune differenze che i testi mostrano rispetto alla letteratura moderna, e gli aspetti che hanno in comune con quella contemporanea; nel fare questo si accennano quindi alcune caratteristiche della società che li ha prodotti.The paper starts off with a brief overview of the contemporary Italian literature; then the reader is guided through an analysis of Jonathan Bazzi's novels, "Febbre" ("Fever") and "Corpi minori" ("Minor bodies"), both translated in English and published by Scribe. The relationship between author, autofiction and social media will also be discussed; in chapter four the reader will find the interview Bazzi kindly granted us
Administration and Curricula of the Introductory Graduate Music Research Course
No full textThe introductory research course is an integral part of many graduate music programs, yet there have been few studies that discuss its curricula across institutions. A questionnaire was sent to instructors of the course to identify shared pedagogical approaches among North American schools of music. The survey was divided into sections that prompted respondents to identify issues discussed in the course, including the types and titles of resources, research methodologies, and library use topics. With a response rate of over 40 percent, the survey also contains valuable data concerning the professional identifications of instructors, assignments used for grading, common textbooks, perception of the course’s efficacy, and more. Shared features of the course included the importance of electronic resources; the minimal use of Internet-mediated instruction formats; a strong preference for English-language materials; and a focus on resources such as databases, style guides, collected works, monuments of music, and thematic catalogs over and above others such as repertoire guides, discographies, directories, and iconographies.Peer reviewedThis publication first appeared in Notes Volume 71, Number 3, March 2015, pp. 448-478. This material may not be copied or reposted without explicit permission. Copyright 2015, Jonathan Sauceda
Citizen participation in news
No full textThe process of producing news has changed significantly due to the advent of the Web, which has enabled the increasing involvement of citizens in news production. This trend has been given many names, including participatory journalism, produsage, and crowd-sourced journalism, but these terms are ambiguous and have been applied inconsistently, making comparison of news systems difficult. In particular, it is problematic to distinguish the levels of citizen involvement, and therefore the extent to which news production has genuinely been opened up. In this paper we perform an analysis of 32 online news systems, comparing them in terms of how much power they give to citizens at each stage of the news production process. Our analysis reveals a diverse landscape of news systems and shows that they defy simplistic categorisation, but it also provides the means to compare different approaches in a systematic and meaningful way. We combine this with four case studies of individual stories to explore the ways that news stories can move and evolve across this landscape. Our conclusions are that online news systems are complex and interdependent, and that most do not involve citizens to the extent that the terms used to describe them imply
To what extent is Lemuel Gulliver in Gulliver’s Travels by Jonathan Swift a reflection of the writer with regard to political and religious views, and attitudes toward women and the concept of family?
No full textThis extended essay is an examination of the extent to which the protagonist Lemuel Gulliver in Gulliver’s Travels is a reflection of Jonathan Swift. It involves the exploration of this research question in terms of politics, religion, attitude to women and family; with references to this piece of literature and some secondary resources when necessary. The quotations from published literary criticism are either refuted by examples from the novel or supported in the light of evidence from the novel. Other secondary resources include Swift’s two other prose works, The Modest Proposal and A Letter to a Very Young Lady on Her Marriage, which are referred to briefly for clarification of the evidence. The purpose of this study is to analyse in what ways and to what extent the protagonist is an author-surrogate in the abovementioned ways.
This essay is comprised of two sections, namely “politics and religion” and “women and family”, each focusing on a particular aspect of the investigation. In the first section, Swift’s political and religious standpoint is discussed extensively in order to correctly evaluate Gulliver’s paradigm. By making connections between the beliefs of the author and those of Gulliver, the relation between the two is established to support the claim of this essay. In the second section, the female figures in the novel and Gulliver’s perception of them are inspected. The plot is also taken into consideration in this part of the inquiry although the central focus is on the persona.
In the conclusion, it is validated that Gulliver is a reflection of Jonathan Swift with regard to political and religious vision, and attitude towards women and family, by juxtaposing and assembling the main elements of personification of Gulliver and Jonathan Swift’s personal ideas and experiences
GSU Sponsors Noted Activist, Author Jonathan Kozol
No full textActivist, educator, and author, Jonathan Kozol, has never been one to mince words or soften his stance. He has spent his life denouncing inequities in education and working tirelessly to elicit conversation and excite change.
On June 23, at 7 p.m., Governors State University’s Metropolitan Institute for Leadership in Education (MILE) will sponsor an appearance by Kozol to discuss the problems and possibilities of public school education
Some remarks upon a pamphlet, entitl’d, A letter to the seven lords of the committee, appointed to examine Gregg. By the author of the Examiner
No full textdoi:10.1155/2012/492105 Research Article A Semi-Deterministic Channel Model for VANETs Simulations
No full textCopyright © 2012 Jonathan Ledy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Today’s advanced simulators facilitate thorough studies on Vehicular Ad hoc NETworks (VANETs). However the choice of the physical layer model in such simulators is a crucial issue that impacts the results. A solution to this challenge might be found with a hybrid model. In this paper, we propose a semi-deterministic channel propagation model for VANETs called UM-CRT. It is based on CRT (Communication Ray Tracer) and SCME—UM (Spatial Channel Model Extended—UrbanMicro) which are, respectively, a deterministic channel simulator and a statistical channel model. It uses a process which adjusts the statistical model using relevant parameters obtained from the deterministic simulator. To evaluate realistic VANET transmissions, we have integrated our hybrid model in fully compliant 802.11 p and 802.11 n physical layers. This framework is then used with the NS-2 network simulator. Our simulation results show that UM-CRT is adapted for VANETs simulations in urban areas as it gives a good approximation of realistic channel propagation mechanisms while improving significantly simulation time. 1
Activist, Author Jonathan Kozol to Speak at GSU
No full textActivist, educator, and author Jonathan Kozol will speak about raising and education our children in a fair and effective society on April 22, at 6:30 p.m., at Governors State University’s Center for Performing Arts. The event is free and open to the public
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