Performance of management solutions and cooperation approaches for vehicular delay-tolerant networks

A wide range of daily-life applications supported by vehicular networks attracted the interest, not only from the research community, but also from governments and the automotive industry. For example, they can be used to enable services that assist drivers on the roads (e.g., road safety, traffic monitoring), to spread commercial and entertainment contents (e.g., publicity), or to enable communications on remote or rural regions where it is not possible to have a common network infrastructure. Nonetheless, the unique properties of vehicular networks raise several challenges that greatly impact the deployment of these networks. Most of the challenges faced by vehicular networks arise from the highly dynamic network topology, which leads to short and sporadic contact opportunities, disruption, variable node density, and intermittent connectivity. This situation makes data dissemination an interesting research topic within the vehicular networking area, which is addressed by this study. The work described along this thesis is motivated by the need to propose new solutions to deal with data dissemination problems in vehicular networking focusing on vehicular delay-tolerant networks (VDTNs). To guarantee the success of data dissemination in vehicular networks scenarios it is important to ensure that network nodes cooperate with each other. However, it is not possible to ensure a fully cooperative scenario. This situation makes vehicular networks suitable to the presence of selfish and misbehavior nodes, which may result in a significant decrease of the overall network performance. Thus, cooperative nodes may suffer from the overwhelming load of services from other nodes, which comprises their performance. Trying to solve some of these problems, this thesis presents several proposals and studies on the impact of cooperation, monitoring, and management strategies on the network performance of the VDTN architecture. The main goal of these proposals is to enhance the network performance. In particular, cooperation and management approaches are exploited to improve and optimize the use of network resources. It is demonstrated the performance gains attainable in a VDTN through both types of approaches, not only in terms of bundle delivery probability, but also in terms of wasted resources. The results and achievements observed on this research work are intended to contribute to the advance of the state-of-the-art on methods and strategies for overcome the challenges that arise from the unique characteristics and conceptual design of vehicular networks.O vasto número de aplicações e cenários suportados pelas redes veiculares faz com que estas atraiam o interesse não só da comunidade científica, mas também dos governos e da indústria automóvel. A título de exemplo, estas podem ser usadas para a implementação de serviços e aplicações que podem ajudar os condutores dos veículos a tomar decisões nas estradas, para a disseminação de conteúdos publicitários, ou ainda, para permitir que existam comunicações em zonas rurais ou remotas onde não é possível ter uma infraestrutura de rede convencional. Contudo, as propriedades únicas das redes veiculares fazem com que seja necessário ultrapassar um conjunto de desafios que têm grande impacto na sua aplicabilidade. A maioria dos desafios que as redes veiculares enfrentam advêm da grande mobilidade dos veículos e da topologia de rede que está em constante mutação. Esta situação faz com que este tipo de rede seja suscetível de disrupção, que as oportunidades de contacto sejam escassas e de curta duração, e que a ligação seja intermitente. Fruto destas adversidades, a disseminação dos dados torna-se um tópico de investigação bastante promissor na área das redes veiculares e por esta mesma razão é abordada neste trabalho de investigação. O trabalho descrito nesta tese é motivado pela necessidade de propor novas abordagens para lidar com os problemas inerentes à disseminação dos dados em ambientes veiculares. Para garantir o sucesso da disseminação dos dados em ambientes veiculares é importante que este tipo de redes garanta a cooperação entre os nós da rede. Contudo, neste tipo de ambientes não é possível garantir um cenário totalmente cooperativo. Este cenário faz com que as redes veiculares sejam suscetíveis à presença de nós não cooperativos que comprometem seriamente o desempenho global da rede. Por outro lado, os nós cooperativos podem ver o seu desempenho comprometido por causa da sobrecarga de serviços que poderão suportar. Para tentar resolver alguns destes problemas, esta tese apresenta várias propostas e estudos sobre o impacto de estratégias de cooperação, monitorização e gestão de rede no desempenho das redes veiculares com ligações intermitentes (Vehicular Delay-Tolerant Networks - VDTNs). O objetivo das propostas apresentadas nesta tese é melhorar o desempenho global da rede. Em particular, as estratégias de cooperação e gestão de rede são exploradas para melhorar e optimizar o uso dos recursos da rede. Ficou demonstrado que o uso deste tipo de estratégias e metodologias contribui para um aumento significativo do desempenho da rede, não só em termos de agregados de pacotes (“bundles”) entregues, mas também na diminuição do volume de recursos desperdiçados. Os resultados observados neste trabalho procuram contribuir para o avanço do estado da arte em métodos e estratégias que visam ultrapassar alguns dos desafios que advêm das propriedades e desenho conceptual das redes veiculares

Irish Law 2010

We are thrilled to be among the first to receive you into our family. We know that this is an exciting time for you and that, if you are anything like we were just a couple of years ago, you probably have plenty of questions about law school and Notre Dame. That\u27s why we\u27ve prepared the Guide. We hope it will answer many of your questions and that it will provide a window into Notre Dame Law School. We also hope that once you look through that window, you\u27ll be as eager to join us as we are to have you! This is called an Insider\u27s Guide because it has been written entirely by students. Over the past year, we\u27ve updated and revised old sections, compiled and created new sections, and edited and re-edited the whole book in hopes of making your transition to law school at Notre Dame easier. This isn\u27t a comprehensive guide to everything you need to know to get through law school, but it is a great place to start. Whether you\u27re trying to figure out where to live next year, what is the best way to get to and around South Bend, where to find a good ethnic restaurant, or what law students do on the weekend, the Guide will be a terrific resource. Please note that some information may have changed since the date of publication, so be sure to confirm pertinent information. We all treasure our experiences here at NDLS. The professors, the students, and the staff of this law school are unique - their warmth, friendship, and true support have made studying law at Notre Dame fun and, undoubtedly, have provided us with a better hope that our enthusiasm, and that of other students, will be apparent throughout the Guide. The entire staff has appreciated reflecting on our experiences here and enjoyed putting the Guide together for you. And, although we know that you have been receiving a variety of information from the Law School and the University, we hope that this look at NDLS from the perspective of your soon-to-be colleagues will be valuable as you prepare for classes

From meritocracy to seniority : shifting masculine aesthetics among blue-collar workers in Montréal Lachine

This thesis examines the workplace culture of young blue-collar males employed by the Department of Green Spaces in the Public Works of the City of Lachine. 2004 marked the beginning of a structural shift that profoundly impacted upon local ideations of work ethics and masculinity. Through extensive participant-observation based field research, I was able to explore how workers interacted with and made sense of their changing world. Following a series of media exposés criticizing the productivity of public workers, les cols bleus are often pre-conceived by citizens and politicians as being "lazy." This stereotype fails to take into consideration the diversity that exists. By focusing on current aspects of the workplace experience as well as how the organization of labour was configured in the past, I was able to explore an adjustment in masculine aesthetics that prioritized mental labour over manual labour, a product of the current hegemonic regime. Through the position of the raconteur , a model I have developed by drawing upon anthropological analyses of working-class masculinity and symbolic performances, attention is brought to the local importance of discursive language. Ultimately, this thesis demonstrates, through the contested discourses of col bleu members surrounding the complex issues of workplace participation, that if we want to improve our understanding of working-class culture and masculinity, neither can be treated monolithically. The way in which work, life and change are negotiated must be investigated if popular notions of gender and class are to be challenged

1995 BRAC Commission

Air Force/Navy - Base Visit Presentations, May 1995. Box 85, L-007

2022 Year in Review

Meeting proceedings of a seminar by the same name, held December 14-15, 2022

Southern Accent September 2003 - April 2004

Southern Adventist University\u27s newspaper, Southern Accent, for the academic year of 2003-2004.https://knowledge.e.southern.edu/southern_accent/1081/thumbnail.jp

Proceedings of the 7th International Conference EEDAL 2013 Energy Efficiency in Domestic Appliances and Lighting

This book contains the papers presented at the seventh international conference on Energy Efficiency in Domestic Appliances and Lighting. EEDAL'2013 was organised in Coimbra, Portugal in September 2013. This major international conference, which was previously been staged in Florence 1997, Naples 2000, Turin 2003, London 2006, B2e0r0l9in, Copenhagen 2011 has been very successful in attracting an international community of stakeholders dealing with residential appliances, equipment, metering liagnhdti ng (including manufacturers, retailers, consumers, governments, international organisations aangde ncies, academia and experts) to discuss the progress achieved in technologies, behavioural aspects and poliacineds , the strategies that need to be implemented to further progress this important work. Potential readers who may benefit from this book include researchers, engineers, policymakers, and all those who can influence the design, selection, application, and operation of electrical appliances and lighting.JRC.F.7-Renewables and Energy Efficienc