100 research outputs found
Mobile Ad Hoc Networks
Guiding readers through the basics of these rapidly emerging networks to more advanced concepts and future expectations, Mobile Ad hoc Networks: Current Status and Future Trends identifies and examines the most pressing research issues in Mobile Ad hoc Networks (MANETs). Containing the contributions of leading researchers, industry professionals, and academics, this forward-looking reference provides an authoritative perspective of the state of the art in MANETs. The book includes surveys of recent publications that investigate key areas of interest such as limited resources and the mobility of mobile nodes. It considers routing, multicast, energy, security, channel assignment, and ensuring quality of service. Also suitable as a text for graduate students, the book is organized into three sections: Fundamentals of MANET Modeling and SimulationâDescribes how MANETs operate and perform through simulations and models Communication Protocols of MANETsâPresents cutting-edge research on key issues, including MAC layer issues and routing in high mobility Future Networks Inspired By MANETsâTackles open research issues and emerging trends Illustrating the role MANETs are likely to play in future networks, this book supplies the foundation and insight you will need to make your own contributions to the field. It includes coverage of routing protocols, modeling and simulations tools, intelligent optimization techniques to multicriteria routing, security issues in FHAMIPv6, connecting moving smart objects to the Internet, underwater sensor networks, wireless mesh network architecture and protocols, adaptive routing provision using Bayesian inference, and adaptive flow control in transport layer using genetic algorithms
Mobile Ad Hoc Networks
Guiding readers through the basics of these rapidly emerging networks to more advanced concepts and future expectations, Mobile Ad hoc Networks: Current Status and Future Trends identifies and examines the most pressing research issues in Mobile Ad hoc Networks (MANETs). Containing the contributions of leading researchers, industry professionals, and academics, this forward-looking reference provides an authoritative perspective of the state of the art in MANETs. The book includes surveys of recent publications that investigate key areas of interest such as limited resources and the mobility of mobile nodes. It considers routing, multicast, energy, security, channel assignment, and ensuring quality of service. Also suitable as a text for graduate students, the book is organized into three sections: Fundamentals of MANET Modeling and SimulationâDescribes how MANETs operate and perform through simulations and models Communication Protocols of MANETsâPresents cutting-edge research on key issues, including MAC layer issues and routing in high mobility Future Networks Inspired By MANETsâTackles open research issues and emerging trends Illustrating the role MANETs are likely to play in future networks, this book supplies the foundation and insight you will need to make your own contributions to the field. It includes coverage of routing protocols, modeling and simulations tools, intelligent optimization techniques to multicriteria routing, security issues in FHAMIPv6, connecting moving smart objects to the Internet, underwater sensor networks, wireless mesh network architecture and protocols, adaptive routing provision using Bayesian inference, and adaptive flow control in transport layer using genetic algorithms
Context Aware Computing for The Internet of Things: A Survey
As we are moving towards the Internet of Things (IoT), the number of sensors
deployed around the world is growing at a rapid pace. Market research has shown
a significant growth of sensor deployments over the past decade and has
predicted a significant increment of the growth rate in the future. These
sensors continuously generate enormous amounts of data. However, in order to
add value to raw sensor data we need to understand it. Collection, modelling,
reasoning, and distribution of context in relation to sensor data plays
critical role in this challenge. Context-aware computing has proven to be
successful in understanding sensor data. In this paper, we survey context
awareness from an IoT perspective. We present the necessary background by
introducing the IoT paradigm and context-aware fundamentals at the beginning.
Then we provide an in-depth analysis of context life cycle. We evaluate a
subset of projects (50) which represent the majority of research and commercial
solutions proposed in the field of context-aware computing conducted over the
last decade (2001-2011) based on our own taxonomy. Finally, based on our
evaluation, we highlight the lessons to be learnt from the past and some
possible directions for future research. The survey addresses a broad range of
techniques, methods, models, functionalities, systems, applications, and
middleware solutions related to context awareness and IoT. Our goal is not only
to analyse, compare and consolidate past research work but also to appreciate
their findings and discuss their applicability towards the IoT.Comment: IEEE Communications Surveys & Tutorials Journal, 201
Estudio del rendimiento de arquitecturas basadas en grupos para WAHSN
[ES] Existen muchos trabajos relacionados con las redes ad hoc y las redes de sensores donde se presentan nuevos
protocolos que encaminamiento que aportan mejores caracterĂsticas, otros trabajos donde se comparan para
ver cual posee un mejor rendimiento Ăł incluso presentan nuevas aplicaciones basadas en este tipo de redes,
pero este trabajo aporta otro punto de vista. ÂżPor que no ver la red como un conjunto que se divide en grupos
para aportar un mejor rendimiento a la red independientemente del protocolo de encaminamiento utilizado?.
Para ello, en este trabajo, vamos a demostrar a través de simulaciones, que la agrupación de nodos en redes
WAHSN (Wireless Ad Hoc & Sensor Networks) aporta mejoras a la red en general, disminuyendo el trĂĄfico
de encaminamiento, el retardo, el throughput, etc. Este estudio se ha realizado evaluando los protocolos
estĂĄndar mĂĄs utilizados (DSR [1], AODV [2] y OLSR [3]), asĂ podemos observar cual de ellos aporta un
mejor rendimiento. Finalmente, se propone una arquitectura de red basada en grupos optimizada para las
redes WAHSN[EN] There are many works related with ad hoc networks and sensor networks where the authors present new
routing protocols with better or enhanced features, others just compare the performance of them or present
an application environment, but this work tries to give another point of view. Why donÂżt we see the network
as a whole and split it intro groups to give better performance to the network regardless of the used routing
protocol?. First, we will demonstrate, through simulations, that grouping nodes in WAHSN (Wireless Ad
Hoc & Sensor Networks) improves the whole network by diminishing the routing traffic, the delay, the
throughput, etc. This study was conducted to assess the most used standard protocols (DSR [1], AODV [2]
and OLSR [3]) that gives better performance to the whole network when there are groups of nodes. Finally, a
group-based network architecture optimized for WAHSN is proposedGarcĂa Pineda, M. (2008). Estudio del rendimiento de arquitecturas basadas en grupos para WAHSN. http://hdl.handle.net/10251/13472Archivo delegad
The implementation of IS on the knowledge management and mental models at the decision-making process
The emphasis of this research is to leverage Knowledge Flow Theory to enhance extant Decision Theory and decision support systems to improve the decision-making process in military organizations in general and to outline a research agenda for subsequent application to the Hellenic Navy. Thus, the challenge of this research effort is to expose the major factors that define the problem of the decision maker for correct decisions through their synthesis. The areas of the dynamic knowledge as well as the mental models have special gravity among the military personnel since they determine the decision making process. Therefore, the intention of the author will be to conduct an introduction of the existed literature and provide greater fidelity and insight into the mechanism within which the emerging technology can either support or in some cases improve our decisions. Hence, the basis of this thesis is to enlighten the technological approach for timely integrated decisions. The method that will be followed focuses on theoretical integration and is expected to result in a general decision-making process for the military that reflects explicit incorporation of Knowledge Flow Theory.http://archive.org/details/theimplementatio109455768Approved for public release; distribution is unlimited
Information Systems for Supporting Fire Emergency Response
Despite recent work on information systems, many first responders in emergency situations are unable to develop sufficient understanding of the situation to enable them to make good decisions. The record of the UK Fire and Rescue Service (FRS) has been particularly poor in terms of providing the information systems support to the fire fighters decision-making during their work. There is very little work on identifying the specific information needs of different types of fire fighters. Consequently, this study has two main aims. The first is to identify the information requirements of several specific members of the FRS hierarchy that lead to better Situation Awareness. The second is to identify how such information should be presented.
This study was based on extensive data collected in the FRS brigades of three counties and focused on large buildings having a high-risk of fire and four key fire fighter job roles: Incident Commander, Sector Commander, Breathing Apparatus Entry Control Officer and Breathing Apparatus Wearers. The requirements elicitation process was guided by a Cognitive Task Analysis (CTA) tool: Goal Directed Information Analysis (GDIA), which was developed specifically for this study. Initially appropriate scenarios were developed. Based on the scenarios, 44 semi-structured interviews were carried out in three different elicitation phases with both novice and experienced fire fighters. Together with field observations of fire simulation and training exercises, fire and rescue related documentation; a comprehensive set of information needs of fire fighters was identified. These were validated through two different stages via 34 brainstorming sessions with the participation of a number of subject-matter experts.
To explore appropriate presentation methods of information, software mock-up was developed. This mock-up is made up of several human computer interfaces, which were evaluated via 19 walkthrough and workshop sessions, involving 22 potential end-users and 14 other related experts. As a result, many of the methods used in the mock-up were confirmed as useful and appropriate and several refinements proposed.
The outcomes of this study include: 1) A set of GDI Diagrams showing goal related information needs for each of the job roles with the link to their decision-making needs, 2) A series of practical recommendations suitable for designing of human computer interfaces of fire emergency response information system, 3) Human computer interface mock-ups for an information system to enhance Situation Awareness of fire fighters and 4) A conceptual architecture for the underlying information system. In addition, this study also developed an enhanced cognitive task analysis tool capable of exploring the needs of emergency first responders.
This thesis contributes to our understanding of how information systems could be designed to enhance the Situation Awareness of first responders in a fire emergency. These results will be of particular interest to practicing information systems designers and developers in the FRS in the UK and to the wider academic community
RFID Technology in Intelligent Tracking Systems in Construction Waste Logistics Using Optimisation Techniques
Construction waste disposal is an urgent issue
for protecting our environment. This paper proposes a
waste management system and illustrates the work
process using plasterboard waste as an example, which
creates a hazardous gas when land filled with household
waste, and for which the recycling rate is less than 10%
in the UK. The proposed system integrates RFID
technology, Rule-Based Reasoning, Ant Colony
optimization and knowledge technology for auditing
and tracking plasterboard waste, guiding the operation
staff, arranging vehicles, schedule planning, and also
provides evidence to verify its disposal. It h relies on
RFID equipment for collecting logistical data and uses
digital imaging equipment to give further evidence; the
reasoning core in the third layer is responsible for
generating schedules and route plans and guidance, and
the last layer delivers the result to inform users. The
paper firstly introduces the current plasterboard
disposal situation and addresses the logistical problem
that is now the main barrier to a higher recycling rate,
followed by discussion of the proposed system in terms
of both system level structure and process structure.
And finally, an example scenario will be given to
illustrate the systemâs utilization
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