605 research outputs found
Interoperabilidade e mobilidade na internet do futuro
Research on Future Internet has been gaining traction in recent years,
with both evolutionary (e.g., Software Defined Networking (SDN)-
based architectures) and clean-slate network architectures (e.g., Information
Centric Networking (ICN) architectures) being proposed. With
each network architectural proposal aiming to provide better solutions
for specific Internet utilization requirements, an heterogeneous Future
Internet composed by several architectures can be expected, each targeting
and optimizing different use case scenarios. Moreover, the increasing
number of mobile devices, with increasing capabilities and
supporting different connectivity technologies, are changing the patterns
of traffic exchanged in the Internet.
As such, this thesis focuses on the study of interoperability and mobility
in Future Internet architectures, two key requirements that need to be
addressed for the widely adoption of these network architectures. The
first contribution of this thesis is an interoperability framework that,
by enabling resources to be shared among different network architectures,
avoids resources to be restricted to a given network architecture
and, at the same time, promotes the initial roll out of new network
architectures. The second contribution of this thesis consists on the
development of enhancements for SDN-based and ICN network architectures
through IEEE 802.21 mechanisms to facilitate and optimize
the handover procedures on those architectures. The last contribution
of this thesis is the definition of an inter-network architecture mobility
framework that enables MNs to move across access network supporting
different network architectures without losing the reachability to
resources being accessed. All the proposed solutions were evaluated
with results highlighting the feasibility of such solutions and the impact
on the overall communication.A Internet do Futuro tem sido alvo de vários estudos nos últimos anos,
com a proposta de arquitecturas de rede seguindo quer abordagens
evolutionárias (por exemplo, Redes Definidas por Software (SDN))
quer abordagens disruptivas (por exemplo, Redes Centradas na Informação (ICN)). Cada uma destas arquitecturas de rede visa providenciar
melhores soluções relativamente a determinados requisitos de
utilização da Internet e, portanto, uma Internet do Futuro heterogénea
composta por diversas arquitecturas de rede torna-se uma possibilidade,
onde cada uma delas é usada para optimizar diferentes casos
de utilização. Para além disso, o aumento do número de dispositivos
móveis, com especificações acrescidas e com suporte para diferentes
tecnologias de conectividade, está a mudar os padrões do tráfego na
Internet.
Assim, esta tese foca-se no estudo de aspectos de interoperabilidade e
mobilidade em arquitecturas de rede da Internet do Futuro, dois importantes
requisitos que necessitam de ser satisfeitos para que a adopção
destas arquitecturas de rede seja considerada. A primeira contribuição
desta tese é uma solução de interoperabilidade que, uma vez que permite
que recursos possam ser partilhados por diferentes arquitecturas
de rede, evita que os recursos estejam restringidos a uma determinada
arquitectura de rede e, ao mesmo tempo, promove a adopção de novas
arquitecturas de rede. A segunda contribuição desta tese consiste
no desenvolvimento de extensões para arquitecturas de rede baseadas
em SDN ou ICN através dos mecanismos propostos na norma IEEE
802.21 com o objectivo de facilitar e optimizar os processos de mobilidade
nessas arquitecturas de rede. Finalmente, a terceira contribuição
desta tese é a definição de uma solução de mobilidade envolvendo diferentes
arquitecturas de rede que permite a mobilidade de dispositivos
móveis entre redes de acesso que suportam diferentes arquitecturas de
rede sem que estes percam o acesso aos recursos que estão a ser acedidos.
Todas as soluções propostas foram avaliadas com os resultados
a demonstrar a viabilidade de cada uma das soluções e o impacto que
têm na comunicação.Programa Doutoral em Informátic
Travel Time Patterns of Students with Special Needs to Special Education Integrated Program-based Schools in Johor Bahru, Malaysia: An Initial Finding
Education for all has been a global priority to ensure that all students have equal access to high-quality education regardless of disability or minority status. In Malaysia, the special education integrated programme (SEIP) is designed to close the inequality gap by integrating special education into existing government and vernacular schools. Numerous studies examine the travel patterns of regular students to school, resulting in a dearth of research on the travel patterns of special needs students to formal school. Thus, this paper uses spatial analysis to demonstrate the travel patterns of students with special needs to SEIP schools. This paper demonstrated that the majority of SEIP schools in the Johor Bahru district can be reached within a 5 to 10 minute drive. Individual travel time analyses between origin (home) and destination (current versus ideal school) indicate that the majority of secondary school students attend their ideal neighbourhood schools, but not primary school students. The average travel time is 12 minutes, with 89 percent of them travelling by car. The travel time clustering analysis revealed that the majority of students who commute to school live within a radius of 2 to 10 km and within a time range of 10 to 20 minutes. However, a small group of these special students commutes to school for 20 to 25 minutes each day. The preliminary findings can be improved and may aid in the design of carpool and transit schedules, as the majority of these students heavily rely on their cars for transportation. The effects of the lengthy commute to school could be further investigated, as these children are vulnerable and any negative impact on their mental, emotional, or physical development must be addressed
Mobile Music Store M-Muze
The introduction of the mobile devices into the electronic commerce arena has allowed
the user to go on the Web as well as shopping on the Web using their cell phones,
Personals Digital Assistants (PDAs) or combo devices without needing a wired Internet
connection and stationary desktop or a laptop computer. In order to give customer's
convenience, service providers and also value-added services include easy, timely
access to information in a way enable customer to make purchase from whenever they
are whenever they are ready. The author here will develop an instant music CD
purchasing via mobile phone application by using Wireless Markup Language (WML)
as a programming tool. The technique that has been adopted is based on Wireless
Application Protocol (WAP) as global standards for mobile solutions. The result of the
study has proven that in order to captivate users' attention towards legal music CD
purchasing through the web via mobile, design of the interface has given an impact
towards the adaptation of content presentation by implementing HCI elements.
Therefore, the design of the interface and content according to one's preference plays an
important role in enhancing users' "browse and buy" experience at any desired time and
needs. The study done towards the implementation of design guidelines for wireless
application which is in general, interface design flaws are platform independent has also
proven that the design best applied depends on the form factors of the wireless mobile
phones.
The system URL: http://www.ideashoppe.com
I
Context Aware Service Oriented Computing in Mobile Ad Hoc Networks
These days we witness a major shift towards small, mobile devices, capable of wireless communication. Their communication capabilities enable them to form mobile ad hoc networks and share resources and capabilities. Service Oriented Computing (SOC) is a new emerging paradigm for distributed computing that has evolved from object-oriented and component-oriented computing to enable applications distributed within and across organizational boundaries. Services are autonomous computational elements that can be described, published, discovered, and orchestrated for the purpose of developing applications. The application of the SOC model to mobile devices provides a loosely coupled model for distributed processing in a resource-poor and highly dynamic environment. Cooperation in a mobile ad hoc environment depends on the fundamental capability of hosts to communicate with each other. Peer-to-peer interactions among hosts within communication range allow such interactions but limit the scope of interactions to a local region. Routing algorithms for mobile ad hoc networks extend the scope of interactions to cover all hosts transitively connected over multi-hop routes. Additional contextual information, e.g., knowledge about the movement of hosts in physical space, can help extend the boundaries of interactions beyond the limits of an island of connectivity. To help separate concerns specific to different layers, a coordination model between the routing layer and the SOC layer provides abstractions that mask the details characteristic to the network layer from the distributed computing semantics above. This thesis explores some of the opportunities and challenges raised by applying the SOC paradigm to mobile computing in ad hoc networks. It investigates the implications of disconnections on service advertising and discovery mechanisms. It addresses issues related to code migration in addition to physical host movement. It also investigates some of the security concerns in ad hoc networking service provision. It presents a novel routing algorithm for mobile ad hoc networks and a novel coordination model that addresses space and time explicitly
Network Security Automation
L'abstract è presente nell'allegato / the abstract is in the attachmen
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Dynamic wireless mobile framework for distributed collaborative real-time information generation and control systems
Intelligent Transportation Systems (ITS) have only recently discovered the exciting possibilities in the nomadic and ubiquitous computing space to build a new generation of information systems by allowing the vehicle to act both as a carrier and consumer of wireless (and thus omnipresent) information. Wide deployment of such ITS systems may eventually allow for more dynamic and efficient transportation systems, which can contribute in several ways towards greater economic growth whilst respecting environmental sustainability. A great number of researchers have dedicated considerable time and resources to tackling traffic related issues by utilising the new wireless capabilities enabled by ITS; such initiatives cover a wide range of applications such as safety, knowledge sharing and infotainment. Indicative of the extent of such efforts is the plethora of research projects initiated by many national and multi-national organisations such as the EU Framework Programme for Research and Technological Development. To achieve their goals, proposed solutions from such organisations depend on the development and deployment of intelligent wireless mobile communication systems, where data dissemination issues make the prospect of efficient and effective communication a challenging proposition. Presently, Car-to-Car and Car-to-Infrastructure communications are two distinct avenues that make possible efficient and reliable delivery of messages via direct radio links in traffic areas. In all cases, high quality of communication performance is desirable for a communication system composed mostly of roaming participants; such a system needs to be dynamic, flexible and infrastructure-less. Consequently, Mobile Ad hoc Network (MANET)-based networks are a natural fit to ITS
Critical Impact of Social Networks Infodemic on Defeating Coronavirus COVID-19 Pandemic: Twitter-Based Study and Research Directions
News creation and consumption has been changing since the advent of social
media. An estimated 2.95 billion people in 2019 used social media worldwide.
The widespread of the Coronavirus COVID-19 resulted with a tsunami of social
media. Most platforms were used to transmit relevant news, guidelines and
precautions to people. According to WHO, uncontrolled conspiracy theories and
propaganda are spreading faster than the COVID-19 pandemic itself, creating an
infodemic and thus causing psychological panic, misleading medical advises, and
economic disruption. Accordingly, discussions have been initiated with the
objective of moderating all COVID-19 communications, except those initiated
from trusted sources such as the WHO and authorized governmental entities. This
paper presents a large-scale study based on data mined from Twitter. Extensive
analysis has been performed on approximately one million COVID-19 related
tweets collected over a period of two months. Furthermore, the profiles of
288,000 users were analyzed including unique users profiles, meta-data and
tweets context. The study noted various interesting conclusions including the
critical impact of the (1) exploitation of the COVID-19 crisis to redirect
readers to irrelevant topics and (2) widespread of unauthentic medical
precautions and information. Further data analysis revealed the importance of
using social networks in a global pandemic crisis by relying on credible users
with variety of occupations, content developers and influencers in specific
fields. In this context, several insights and findings have been provided while
elaborating computing and non-computing implications and research directions
for potential solutions and social networks management strategies during crisis
periods.Comment: 11 pages, 10 figures, Journal Articl
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