53 research outputs found
Uma abordagem SDN para virtualização de redes
Full text linkThe virtual SDN networks (vSDNs) have emerged from the association of virtualization
and Software-Dened Networking (SDN), providing greater control and better
use of network resources. Several studies have already shown the feasibility and benets
of this approach. However, the issue still lacks solutions that can virtualize a network
in a scalable, intuitive and simplied manner. Thus, this thesis proposes an SDN approach
to network virtualization with the aim of reducing the limitations on vSDNs.
Therefore, it is suggested to adopt in network virtualization the separation between data
plans (distributed) and control (centralized), the global network view and use of ow
abstraction to manage the communication between the dierent points. To support our
proposition, three solutions were developed: the CIM-SDN (Common Information Model
for Software-Dened Networking), to enable the use of formal representation of the
new elements of vSDNs; The NVP (Network Virtualization Proxy), to provide greater
scalability by separating the control plane into centralized and decentralized parts; And
Graph Virtualization Layer (GVL), to provide greater use of abstractions between the
hypervisor and controllers, thereby simplifying the understanding and use of the network.
Proof of concept tests was carried out for the three proposed solutions, demonstrating the
feasibility of the approach.As Redes Virtuais Denidas por Software (virtual SDN networks - vSDNs) surgiram
da associac~ao de virtualizac~ao e Redes Denidas por Software (Software-Dened
Networking - SDN), proporcionando maior controle e melhor utilização dos recursos de
rede. Vários trabalhos ja mostraram a viabilidade e benefícios dessa abordagem. No
entanto, o tema ainda carece de soluções que possam virtualizar uma rede de forma escalável, intuitiva e simplificada. Desta forma, esta Tese propõe uma abordagem SDN para
a virtualização de redes com o objetivo de reduzir as limitações em vSDNs. Sendo assim,
sugere-se adotar na virtualização de rede a separação entre planos de dados (distribuído) e
controle (centralizado), visão global da rede e uso de abstração de fluxo para gerir a comunicação entre os diferentes pontos. Para sustentar nossa proposição, três soluções foram
desenvolvidas: o CIM-SDN (Common Information Model for Software-Dened Networking),
para viabilizar o uso de representação formal dos novos elementos das vSDNs; o
NVP (Network Virtualization Proxy), para prover maior escalabilidade através da separação do plano de controle em partes centralizadas e descentralizadas; e o GVL (Graph
Virtualization Layer), para fornecer maior uso de abstrações entre o hypervisor e os controladores
simplicando, assim, o entendimento e uso da rede. Foram realizadas provas
de conceitos para as três soluções propostas, demonstrando a viabilidade da abordagem
Caracterização de organizações autônomas descentralizadas
No full textThe concept of Decentralized Autonomous Organization (DAO) has emerged as an organization
that can operate without a managerial hierarchy, that is, autonomous. This concept was made possible
by blockchain technology, and for this reason, was restricted to it. Although the blockchain
studies are constantly advancing, some concepts linked to it still cause doubts. When decoupling
DAO from blockchain, it ceases to be the study of an area and becomes an area of study, for that,
a survey of its characteristics and its association with already established concepts is necessary.
The identification and understanding of these characteristics of DAO, in a clear and objective way,
generating their characterization, was the main objective of this work. This characterization is
relevant both for its analysis and for its development. By relating the DAO concept to established
concepts, we can diversify and cover a greater number of DAO studies. In order to achieve these
objectives, this work proposes to characterize DAO through the domain analysis, to define it in a
way not to limit to a specific technology, susceptible of obsolence, correlating the characteristics
to the concepts of Multiagent Systems and Decentralized Organizations. For the development of
this work, we used a method of domain analysis that was free of implementation aspects, more
precisely, the Feature-Oriented Domain Analysis Method (FODA), in which we obtained the
main characteristics. In terms of these characteristics, we analyze them in order to integrate them
and, finally, generate a free definition of technological aspects.O conceito de Organizações Autônomas Descentralizadas (Decentralized Autonomous Organization
- DAO) surgiu como um organização que pode operar sem uma hierarquia gerencial, ou seja,
autônoma. Esse conceito foi desenvolvido na tecnologia blockchain, e por este motivo, foi restrito
a ela. Embora os estudos na área da blockchain estejam em constante avanço, alguns conceitos
atrelados a ela ainda causam dúvidas. Ao desvincular DAO de blockchain, ela deixa de ser o
estudo de uma área e passa a ser uma área de estudo, para tanto, é necessário um levantamento
de suas características e sua associação com conceitos já estabelecidos. A identificação e compreensão
dessas características de DAO, de forma clara e objetiva, gerando a sua caracterização, foi
o principal objetivo deste trabalho. Essa caracterização se mostra relevante tanto para sua análise,
quanto para o seu desenvolvimento. Ao relacionarmos o conceito de DAO com conceitos estabelecidos,
podemos diversificar e abranger um maior número de estudos em DAO. Para atingir
esses objetivos, este trabalho propõe caracterizar DAO através da análise de domínio, defini-la
de forma a não limitar à uma tecnologia específica, passível de obsolescência, correlacionando
as características aos conceitos de Sistemas Multiagentes e Organizações Descentralizadas. Para
desenvolvimento deste trabalho, utilizamos um método de análise de domínio que fosse livre de
aspectos de implementação, mais precisamente, o Método de Análise de Domínio Orientado
a Características (Feature-Oriented Domain Analysis Method - FODA), em que obtivemos as
principais características. De porte dessas características, analisamos elas de forma a integrá-las
e, por fim, geramos um definição livre de aspectos tecnológicos
Um gerenciador de pacotes de aplicações para redes definidas por software
No full textThe paradigm of Software-Defined Networking (SDN) has been investigated as the most promising solution to the current ossification of the Internet problem, since it proposes the decoupling of data plane and control plane, providing greater programmability to networks. However, there are currently no open tools that promote the application management for SDN controllers, similarly there are no standardization to packaging it. For this reason, in this work will be presented a solution called Software Package Manager for SDN Applications - SPM. This tool defines a method for packaging applications SDN, in order to make their practical the control path management of programmable networks, from the use of APIs that automates the installation, update and removal of same which are distributed through a Web repository of these packages.
For validation of this work was selected POX controller, from which it was possible the composition of a database for the SPM tool can select the information it need to manage applications in this controller. Throughout the text will be presented the relation of this work with the elements of SDN control plane as well as demonstrated the similarity of this proposal with the package management on GNU/Linux. Finally it will be detailed the solution given by the SPM tool and presented the results of this implementation.O paradigma de Redes Definidas por Software (SDN) tem sido investigado como a solução mais promissora para o atual engessamento da Internet, uma vez que propõe a dissociação entre o plano de dados e o plano de controle, proporcionando maior programabilidade ás redes. Contudo, não existem atualmente ferramentas abertas que promovam o gerenciamento de aplicações para controladores SDN, o mesmo ocorre com a padronização no empacotamento destas. Por esse motivo, neste trabalho sera´ apresenta uma solução chamada de Software Package Manager for SDN Applications - SPM. Esta ferramenta define um m´etodo de empacotamento para aplicações SDN, a fim de tornar prático o seu gerenciamento no plano de controle de redes programáveis, a partir do uso de APIs que automatizam a instalação, remoção e atualizaçãoo das mesmas as quais serão distribuídas por meio de um repositório Web, contendo estes pacotes.
Para validação deste trabalho foi selecionado o controlador POX, a partir do qual foi possível a composição de um banco de dados para que a ferramenta SPM possa selecionar as informações que precisa para gerenciar aplicações neste controlador. Ao longo do texto será apresentada a relação deste trabalho com os elementos do plano de controle SDN, bem como demonstrada a semelhança desta proposta com o gerenciamento de pacotes no GNU/Linux. Finalmente será detalhada a solução dada pela ferramenta SPM e apresentados os resultados desta implementação
Perhabs I Will: A Content Analysis and Media Production Focusing on Contemporary Comedy and Comedians
Full text linkThis research examined the comedy talk shows Billy on the Street (2011-2017), The Eric Andre Show (2012-present), and Ziwe (2021-present) in order to discover the specific types of humor incorporated within their programs. This study searched for the presence of cringe, stand-up, surreal, sketch, and improvisational comedy in each show. The study analyzed each program using the benign violation theory and the hierarchy of influences model. A content analysis of 15 episodes selected across every program found at least three of the five genres present in their content. An additional purpose of this study was to produce a comparable program called *Perhabs I Will… This show was created by the author to formulate her personal brand of comedy, based on discoveries made from observing the content of Billy Eichner, Eric Andre, and Ziwe Fumudoh. Simultaneously conducting research and producing Perhabs I Will… proved effective, as the study informed many decisions made in the production
Expatriate Geographies of Malta
Full text linkThere are few topics more geographical than migration; it involves movement through space and over time, whilst influencing the social, economic and environmental landscape on both a small-scale and global scale. As contemporary scholarship moves to concerns about migrants themselves rather than impacts on the communities in which they settle (Innes, 2008), our study builds on this through investigating the reasons for this phenomenon. Over the last fifteen years international migrant numbers have risen rapidly (United Nations, 2015), particularly true in the case of Malta with migrants forming 3% of the total population; 40% of these that are British expatriates. In light of this, our investigation focusing on a case study of expatriates seeks to understand the factors that influence migration decisions, and the reasons why expatriates choose to stay in Malta. The research focused on a qualitative methodological approach of semi-structured interviews/questionnaires, a focus group and in-depth conversations. Through the hourglass notion of research (Donnelly and Trochim, 2006) such data collection revealed family ties, warm weather and the relaxed lifestyle to be among the predominant factors in expatriate’s movements. Tangible factors such as driving on the same side of the road, whilst influential, were found to not be the deciding factors in migration movements
David Martyn Lloyd-Jones 1899-1981 and twentieth-century evangelicalism.
Full text linkThe purpose of this thesis was to demonstrate the significance of the life and ministry of David Martyn Lloyd-Jones in post-war British evangelicalism and to show that, so far as Protestant churches in England and Wales were concerned, no history of the period can afford to ignore him. It is our contention that despite differences of opinion and self- marginalization Lloyd-Jones was and has remained a major force in evangelical thinking. In order to understand how this developed the thesis has been structured along thematic lines highlighting events, persons and questions. The study begins by setting the stage with a biographical chapter and goes on to examine the kind of impact that Lloyd-Jones's preaching had on Christians of all denominations. He believed preaching to be the greatest need of the day and the position of this thesis is that preaching was Lloyd-Jones's greatest contribution to twentieth- century Christianity. As a preacher he attracted one of London's largest congregations and in chapter three we look at the history and nature of Westminster Chapel comparing it with neighbouring ministries, and establishing the kind of people who went to hear him. Chapters four and five ascertain the factors which shaped Lloyd-Jones's views on the church and show how his Reformed evangelicalism led in a separatist as opposed to an ecumenical direction and finally, to a position which was neither Congregational nor Presbyterian. Our further argument is that while he favoured unity among believers his separatist ecclesiology only exacerbated the situation and left evangelicals more divided than before. Chapters six to eight evaluate Lloyd-Jones's background, the nature of his leadership and the extent of his influence - factors which either shaped or were the outcome of his ministry - and looks at the issues which these questions raise
The Settlement: The First Norwegian Lutheran Settlement In Montana
Full text linkA timothy-hidden cemetery, rotting with age, in a field of cattle on a peaceful August day--1962. How can this be connected, even remotely with the strife, the policies that caused political turmoil, and the religious apprehension that characterized Norway in the latter part of the nineteenth century? Why are these graves crumbling so far from the homeland of their occupants and what of their descendants? Have they all become shadowy figures in the settling dust of the American West? This is that half-forgotten history of a home-loving people who died half-way around the world from their native hearths. These Norwegian immigrants settled along Billy Creek close to the Sweet Grass River in southwestern Montana, but it was the Crazy Mountains rising starkly into the sky that reminded them most of their fatherland. The stretches of level prairie, the buttes, the rolling hills, and the creeks with their natural brush shelters were quickly adopted by the settlers as their own. The author became interested in them for a number of reasons. Her great-grandfather, Paul L. Van Cleve, Sr., moved to Montana, and more particularly, Porcupine Butte on the Sweet Grass River, just four miles north of the Norwegian Settlement in the early 1880's. His only son married and settled a mile south of the Settlement. This alone would probably have been sufficient incentive to write the paper, but beyond that Paul Jr. had a daughter, Charlotte, the author's aunt who married Torvald Anderson, the grandson of Knute Anderson, one of the first settlers. For the story of these settlers, then, the author is deeply indebted not only to her own family, but to the following people as well: Sverre Untsed who spent the greater part of the summer of 1962 corresponding with the author to fill in the blank spots on the emigrants; Ben Olness, Mrs. Clara Liebel, Mrs. Eva Roquet, Mrs. Green and Reverend Johnson who were more than willing to aid the author by means of numerous interviews and the loan of any pertinent books and letters. Thanks should also be extended to the descendants of these settlers who were a great source of information to the author in everyday living
Redefining loyalism: a political perspective, an academic perspective
No full textRedefining loyalism: a political perspective. Although loyalism in its modern sense has been around since the 1920s, it ac-quired its present shape only at the beginning of the 1970s. Then it was reborn in paramilitary form, and was used by other, more privileged, unionists to serve their own interests. Yet the sectarianism within which loyalism developed disguised the fact that less privileged members of the two communities had much in common. Separation bred hatred, and led to an unfounded sense of advantage on the part of many Protestants who in reality enjoyed few material benefits. The pursuit of ac-commodation between the two communities can best be advanced by attempts to understand each other and to identify important shared interests, and the peace process can best be consolidated by steady, orchestrated movement on the two sides, and by ignoring the protests of those who reject compromise.
Redefining loyalism: an academic perspective: In recent years a division has emerged within unionism between two sharply con-trasting perspectives. On the one hand, traditional unionism has relied on a dis-course of perpetuity, relying on long-standing values and political attachment to the old order, and seeing in the developments that have been taking place since 1998 evidence of a creeping form of Irish unity. By contrast to these, “new loyalism”, rep-resented in particular but not exclusively by the Progressive Unionist Party, is based on a reinterpretation of the past of unionism, seeing in this a pronounced and politically significant class structure, and putting the case for the defence of working class interests. This alternative vision rests on a more pluralistic concep-tion of the politics of Northern Ireland
Identity and consumption practices of Northamptonshire Caribbeans c.1955-1989
No full textThe objective of this thesis is to delineate and analyse Northamptonshire Caribbeans' consumption c.1955-1989. Author-collected and other oral histories alongside complementary primary and secondary references dovetail to unearth and analyse aspects of Post-War Caribbean consumption in a British provincial location that have been significantly unexplored previously. Central to the argument is the contention that identity is fundamentally significant in comprehending and analysing Northamptonshire Caribbeans' consumption. Various conceptualisations of identity facilitated development of consumer materialisations and aspirations. This thesis explores how multiple forms of identity as Caribbean, Black and British people were significant in shaping local Caribbeans' consumption. The succeeding pages address and analyse how these multiple identities influenced consumption and how provincial consumer behaviour was shaped by Caribbeans' relative co-ethnic isolation in Northamptonshire. Chapter 3 delineates and analyses consumer practices and practicalities of Northamptonshire Caribbeans. Integral within these consumer practices and practicalities are changes in consumption over time, intergenerational differences in consumption, as well as aspects of consumption that could be considered 'typical' and/or 'atypical' Northamptonshire Caribbean consumption; all of which are incorporated within this chapter. Chapter 4 connects identity and consumption through enhancing understanding of Northamptonshire Caribbeans' consumer networks. These networks interacted with the combination of identities local Caribbeans psychologically felt part of within various Caribbean, Black and British permutations. Furthermore, such identities varied more widely amongst the younger generation than their co-ethnic elders, a concept which is also addressed. Education and cultural currency are two novel strands through which to analyse connections between consumption and identity. The final two chapters deploy these concepts in an innovative manner creating and developing greater understanding of Northamptonshire Caribbeans' consumption. Chapter 5 expounds on the concept that education can be used as consumption whilst shaping future consumer behaviour, both ideas significantly under-explored previously. Chapter 6 introduces the theory of cultural currency, the idea that aspects of culture have finite, but changing, values and must be shared to have value similar to monetary currencies having exchange values for other monetary currencies. This chapter demonstrates how Northamptonshire Caribbeans shared aspects of Caribbean culture as cultural currency, fostering co-ethnic strength whilst gaining inter-ethnic respect for Caribbeans. Through comprehending Caribbean identity, correlations between empirical and social history, local consumption, as well as educational and cultural circumstances that stimulated and inspired Northamptonshire Caribbeans, this thesis distinctively illuminates how local Caribbeans' consumption interacted with various permutations of Afro-Caribbean, Black and/or British identities whilst representing idiosyncratic local nodes within these larger amalgamations
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