Relatório de um estágio na Estaçäo INIA - Murcia (Espanha)
Pacheco, Carlos A.S.
1984
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103 records were found.
Contém: W-3: Artigicial transportation systems and simulation
Descrição baseada em: Vol. 30, nº 6 (Junho 93)
Descrição baseada em: vol. 10,nº 5(Set./Out. 2004)
Descrição baseada em: vol. 11, nº 4 (Dez. 2004)
Descrição baseada em: (vol. 42, nº 4/2004)
Desc. baseada em: Vol. 1, nº 2 (Jun./Jul./Ago 2007)
Contém: W-1: Emergent cooperative technologies in intelligent transportation systems
Descrição baseada em: Vol. 15, nº 3 (Maio 1998)
Desc. baseada em: Vol.11, Nº 11(Nov. 2001)
Descrição baseada em: vol. 44,nº 4(Nov. 2001)
Descrição baseada em (Vol. 33, nº 8 Agosto 1998)
Descrição baseada em: Vol. 47, nº 1 (Jan. 2000)
Descrição baseada em: Vol. 46, nº 1 (Jan. 1999)
Descrição baseada em: Vol. 53, nº1 (Jan. 2004)
Descrição baseada em: Vol. 44, nº 5 (Set. 1998]
“Copyright © [2010] IEEE. Reprinted from 18th International Conference on Software, Telecommunications and Computer Networks (SoftCOM 2010). ISBN: 978-1-4244-8663-2
. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2010] IEEE. Reprinted from IEEE International Conference on Communications (IEEE ICC 2010) - General Symposium on Selected Areas in Communications (ICC'10 SAS).ISSN:1550-3607. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2009] IEEE. Reprinted from 5th International Conference on Signal-Image Technology & Internet-Based Systems. ISBN:978-1-4244-5740-3. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2009] IEEE. Reprinted from 17th International Conference on Software, Telecommunications & Computer Networks, 2009. SoftCOM 2009.ISBN:978-1-4244-4973-6. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2010] IEEE. Reprinted from IEEE International Conference on Communications (IEEE ICC 2010). ISSN:1550-3607. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2009] IEEE. Reprinted from Fourteenth IEEE Symposium on Computers and Communications (ISCC’09.ISSN:1530-1346. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2010] IEEE. Reprinted from 4th International Conference on Complex, Intelligent and Software Intensive Systems. ISBN:978-1-4244-5917-9. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2007] IEEE. Reprinted from 11th International Conference on Intelligent Engineering Systems , 2007. ISBN:1-4244-1147-5
This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2008] IEEE. Reprinted from IEEE International Symposium on Industrial Electronics, 2008. ISBN:978-1-4244-1665-3 -8. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2009] IEEE. Reprinted from 18th IEEE International Conference on Control Applications, 2009. ISBN:978-1-4244-4601-8.This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
"Copyright © [2010] IEEE. Reprinted from IEEE International Conference on Control Applications, 2010. ISBN: 978-1-4244-5362-7. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2010] IEEE. Reprinted from 15th IEEE Mediterranean Electrotechnical Conference. ISBN: 978-1-4244-5793-9.
This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org.
By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2009] IEEE. Reprinted from ICTON-MW 3rd. ISBN:978-1-4244-5745-8. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org.
By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2010] IEEE. Reprinted from ICTON 2010. ISBN 978-1-4244-7798-2.
This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or
for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org.
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Copyright © [2009] IEEE. Reprinted from ICTON 2009. ISBN 978-1-4244-4826-5.
This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org.
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“Copyright © [2010] IEEE. Reprinted from ICTON 2010. ISBN: 978-1-4244-7799-9.
This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or
for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org.
By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2010] IEEE. Reprinted from 15th IEEE International Workshop on Computer-Aided Modeling Analysis and Design of Communication Links and Networks.(IEEE CAMAD 2010) ISBN:978-1-4244-7634-3. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2001] IEEE. Reprinted from 8th IEEE International Conference on Electronics, Circuits and Systems. ISBN:0-7803-7057-0. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2009] IEEE. Reprinted from 5th International Conference on Wireless and Mobile Computing, Networking and Communications. WIMOB 2009. ISBN: 978-0-7695-3841-9
. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2009] IEEE. Reprinted from First International Conference on Advances in System Simulation.ISBN:978-1-4244-4863-0. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2010] IEEE. Reprinted from 2nd International Conference on eHealth, Telemedicine, and Social Medicine . ISBN: 978-0-7695-3950-8. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
The use of a centralised planning scheduler in fieldbus- based systems requiring real-time operation has proved to be a good compromise between operational flexibility and timeliness guarantees.
In this paper a preliminary implementation of a hardware scheduling coprocessor based in the planning paradigm is presented. The coprocessor is installed in a special node of the fieldbus, the bus arbiter, and generates scheduling tables to be dispatched by the node CPU. With this solution it is possible to decrease the response time to changes in the system configuration or message parameters of the software-based planning scheduler. This opens the possibility of allowing automatic on-line changes requested by system nodes in addition to the ones requested by human operators, thus improving system reactivity.
In this paper the focus is on the coprocessor’s interface with the node CPU and its overall functionality. Initial calculations showing the feasibility of the unit and its expected performance are also derived.
“Copyright © [1999] IEEE. Reprinted from 7th Annual IEEE Symposium on Field-Programmable Custom Computing Machines ISBN:0-7695-0375-6. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2008] IEEE. Reprinted from International Conference on Communication Theory, Reliability, and Quality of Service, 2008. CTRQ '08. ISBN:978-0-7695-3190-8. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
Copyright © [2010] IEEE. Reprinted from 12th IEEE International Conference on e-Health Networking, Applications and Services . ISBN: 978-1-4244-6374-9. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2011] IEEE. Reprinted from Internet of Things (iThings/CPSCom), 2011 International Conference on and 4th International Conference on Cyber, Physical and Social Computing. ISBN 978-1-4577-1976-9
This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
This paper presents an educational tool to be used in signal processing interpolation-related subjects. Besides the consolidation of acquired theoretical knowledge, the tool allows its users to apply three error patterns geometry to the signals and test minimum dimension and maximum dimension signal reconstruction algorithms. In the specific case of minimum dimension problems it can be solved using different solvers, iterative and direct linear equations methods. The developed tool allows the problem conditioning analysis through the spectral radius of the system matrix, the condition number and others parameters available in some specific methods. This feature gives the possibility to alter the problem definitions to the desired goal before the reconstruction begins and to choose the optimal method, depending on each problem constraints The time unit that measures the algorithms performance is expressed in terms of one Fourier Transform (FFT) calculation time. In this way the data is presented not in an absolute way but in a relative measure independent from the machine’s architecture.
The existence of replicated code in a system makes that system harder to maintain and evolve. To remove replicated code the usual way is to use refactorings. However there are always clones that cannot be removed by refactorings alone. Some are due to lack of composition mechanisms in the underlying programming language. We propose the use of roles to remove such clones since roles provide a finer degree of composition. We sketch four role refactorings to remove code clones and apply them in a case study using the JHotDraw framework. Results show that roles have a positive impact in clone reduction as they were able to remove almost all clones traditional refactorings could not.
Toward ubiquitous mobility solutions for body sensor networks on healthcare
“Copyright © [2013] IEEE. Reprinted from IEEE Journal of Selected Topics in Quantum Electronics. ISSN: 1932-4553. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
No desenvolvimento de aplicações sensíveis ao contexto é
importante que existam aplicações/plataformas que sejam
responsáveis pela descoberta e processamento das informações do
contexto e que disponibilizem essa informação para ser usada por
essas aplicações. Neste trabalho é apresentado um sistema
autónomo para caracterização do contexto de um local, com
informação sobre a sua localização, sobre as condições ambientais
e sobre a natureza da instituição onde se encontra esse espaço, e
que permite disponibilizar essa informação para que possa ser
facilmente usada por outras aplicações. As avaliações preliminares
mostram que o sistema permite obter informações de contexto
relevantes relacionadas com o local e com as características e
natureza da instituição onde este se insere. Esta framework pode
ser útil para facilitar a obtenção de informação de contexto em
espaços públicos e na sua disponibilização para ser usada por
aplicações sensíveis ao contexto.
(c) 2007 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Traditionally, context-aware applications are developed
using one of the following approaches: each application
communicates directly with sources of context information;
applications are developed with the aid of reusable libraries for
processing context information or applications have their own
context models. These approaches not only require effort on the
part of those who develop them, but also create dependency
between the developed context-aware applications and the
systems developed for obtaining and providing the context
information, thus hindering their reuse in other applications. In
this paper we present a system that autonomously characterizes
the physical, social and organizational context of a public space
and delivers this information to context-aware applications.
Experiments show that it provides relevant and useful context
information that can be used by context-aware applications to
improve their services.
Paper presented at IEEE HEALTHCOM 2013. Only abstract available.
“Copyright © [2012] IEEE. Reprinted from IEEE International Conference on Communications – ICC’2012. ISBN: 978-1-4577-2052-9 This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2011] IEEE. Reprinted from ICT Future Network & Mobile Summit 2011. ISBN: 978-1-4577-0928-9.
This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2010] IEEE. Reprinted from International Computer Engineering Conference ICENCO’2010. ISBN: 978-1-61284-184-7 This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
“Copyright © [2012] IEEE. Reprinted from ICT Future Network & Mobile Summit 2012. ISBN: 978-1-4673-0320-0.
This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
Creating a standard for knowledge representation and reasoning in autonomous robotics is an urgent task if we consider recent advances in robotics as well as predictions about the insertion of robots in human daily life. Indeed, this will impact the way information is exchanged between multiple robots or between robots and humans and how they can all understand it without ambiguity. Indeed, Human Robot Interaction (HRI) represents the interaction of at least two cognition models (Human and Robot). Such interaction informs task composition, task assignment, communication, cooperation and coordination in a dynamic environment, requiring a flexible representation. Hence, this paper presents the IEEE RAS Autonomous Robotics (AuR) Study Group, which is a spin-off of the IEEE Ontologies for Robotics and Automation (ORA) Working Group, and its ongoing work to develop the first IEEE-RAS ontology standard for autonomous robotics. In particular, this paper reports on the current version of the ontology for autonomous robotics as well as on its first implementation successfully validated for a human-robot interaction scenario, demonstrating the developed ontology’s strengths which include semantic interoperability and capability to relate ontologies from different fields for knowledge sharing and interactions.
“© © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”
This paper describes a system developed to implement the actuation after the data acquisition and processing from the plant. It was implemented over a previous developed CAN network, based on the 80C592 microcontroller from Philips implementing a hierarchical structure to form a tree topology. In this network a Personal Computer is connected through a Net Manager to units named Masters, located at the greenhouses, that allows the management of several secondary units named Slaves. This units are implemented using a SLIO (Serial Linked I/O device) from Philips, making possible the greenhouses control. This choice is due to the fact that the SLIO allows a cheaper solution to applications where no high speed requirements are needed such as the on/off functions. The assembling of the actuators within a greenhouse allows the use of an architecture whose communication is done through the main power cables. As mean of communication is used the CAN (Controller Area Network) protocol, which has a great flexibility and robustness needed in real-time control. The system, must allow easy expansion and configuration without compromising its performance. This is the case when the parameters must be changed whenever the weather conditions (Summer/Winter), force us to modify the setpoints of several control variables such as: temperature, light, humidity, among others.
This paper presents a new approach to help redesigning waste management for the cities of the future. The current state of tracking waste containers is rigid, inefficient and hard to oversee. Although attempts have been made in the past using radio-frequency identification for waste container detection, it has shown problems like flexibility, cost and environmental impact. We propose and demonstrate a solution based on the use of computer vision techniques, for object detection and classification, towards the differentiation between different types of waste containers.
“© © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”
In recent years the Internet of Things, in addition to use cases in 'smart cities', has also increasingly been used in precision agriculture. As in the rest of the world, it has been a growing reality in Portugal. In an agricultural environment, where energy resources can be scarce and dispersed, the implementation of a LoRa network with autonomous sensor nodes must consider the limitations imposed by the energy consumed by the sensor node, when powered by a battery and a solar panel. For this, experimental tests must be carried out so that there is enough data for the implementation and optimization of the devices. This article presents a work focused on the study of the autonomy and energy efficiency of the sensor device, using algorithms capable of managing energy consumption as a function of the luminosity of the place. Preliminary results attest to the relevance of this approach, keeping the sensor node in operation without interruptions.
This paper describes a fully automated system for remote infrared and visible light detection and surveillance of forest fires. The project includes a set-up of a laboratory demonstrator. Topics such as image acquisition, automatic control and radiation levels detection are discussed.
“© © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”
“© © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”
Descrição baseada em: Vol. 35, nº 12 (Dez. 2002)
Descrição baseada em: vol. 51, nº 9 (Set. 2002)
Descrição baseada em: vol. 22, nº 5 (Set/Out. 2002)
Descrição baseada em: vol. 19, nº 5 (Set/Out. 2002)
Descrição baseada em: Vol. 49, nº 12 (Dec. 2001)
For conventional cyclic prefix (CP)-assisted single-carrier/frequency-domain equalization (SC/FDE) implementations, as well as for orthogonal frequency-division multiplexing (OFDM) implementations, the CP length is known to be selected on the basis of the expected maximum delay spread. Next, the data block size can be chosen to be large enough to minimize the CP overhead, yet small enough to make the channel variation over the block negligible. This paper considers the possibility of reducing the overall CP assistance, when transmitting sequences of SC blocks, while avoiding an excessively long fast Fourier transform window for FDE purposes and keeping good FDE performances through low-complexity, noniterative receiver techniques. These techniques, which take advantage of specially designed frame structures, rely on a basic algorithm for decision-directed correction (DDC) of the FDE inputs when the CP is not long enough to cope with the time-dispersive channel effects. More specifically, we present and evaluate a novel class of reduced-CP SC/FDE schemes, which takes advantage of a special frame structure for replacing "useless" CP redundancy by fully useful channel coding redundancy, with the help of the DDC algorithm. When using the DDC-FDE technique with these especially designed frame structures, the impact of previous decisions, which are not error-free, is shown to be rather small, thereby allowing a power-efficiency advantage (in addition to the obvious bandwidth-efficiency advantage) over conventional block transmission implementations under full-length CP. Additionally, the DDC algorithm is also shown to be useful to improve the power efficiency of these conventional implementations.
For conventional cyclic-prefix (CP)-assisted block transmission systems, the CP length is selected on the basis of the expected maximum delay spread. With regard to single-carrier (SC)-based block transmission implementations, a full-length CP
is recommendable, since it allows good performances through the
use of simple frequency-domain equalization (FDE) techniques.
In this letter, a soft-decision-directed correction (SDDC)-aided
turbo FDE technique is presented for reduced-CP SC-based block
transmission systems using conventional frame structures. The
relations with some already known iterative FDE techniques are
established, and a set of performance results is reported and discussed.
The advantages of the proposed approach are emphasized,
namely, the possibility of approximately achieving (besides the
obvious bandwidth efficiency gain) the maximum power efficiency
gain that a strong CP reduction allows.
This paper presents some project themes
proposed by the authors and the methodology adopted in its supervision, in a transdisciplinary approach. We describe the projects and discuss the most relevant
aspects of this approach, from the technical and pedagogical points of view. The stronger points of this methodology are some similarities with the
environment that recent graduated students might find
in the employment market. Balancing the pros and
cons we conclude that due to the project
interdependencies, benefits are mainly on technical
skills improvement and in mutual responsibilities to
accomplish tasks on schedule.
The work presented in this paper aims at exploring new ways of integrating, visualizing and interacting with geotechnical and geophysical data that may be more rich and interactive than those offered by most current Geographic Information Systems (GIS). Some visualization techniques enabling simultaneous visualization of the several data types available in our case study are proposed. Moreover, methods were developed to guide experts while defining layers and other relevant geological structures. The work is still in an early stage and is main goal has been assessing the validity and adequacy of the proposed techniques to the specific geotechnical and geophysical data under consideration.
“Copyright © [2008] IEEE. Reprinted from 12th Annual IEEE International Symposium on Consumer Electronics (ISCE 2008). ISBN:978-1-4244-2422-1. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.”
A sociedade está a envelhecer. Ao mesmo tempo, a evolução tecnológica é de tal ordem que se origina o fenómeno de infoexclusão entre os mais velhos. Na mesma linha, as aplicações digitais (Apps), são cada vez mais e, cada vez mais, substituem serviços anteriormente prestados através de uma presença física.
O e-banking é o perfeito exemplo deste fenómeno. Através deste estudo pretendeu-se conhecer a opinião de idosos com mais de 65 anos acerca das aplicações direcionadas ao e-banking, percebendo as suas limitações. Desta forma, a metodologia utilizada foi baseada na técnica de entrevista estruturada (de
modo a perceber os dados sociodemográficos), observação participante da interação com a app (com registo em grelha de observação), notas de campo e focus group. Esta foi aplicada a 5 idosos que sabem ler e escrever, num centro de dia de uma localidade sem existência de ATM (Caixa Multibanco). Concluiuse que estes embora considerem as aplicações interessantes preferem o atendimento presencial.
A aprendizagem ao longo da vida constitui uma preocupação dos vários Estados no sentido de conseguir que os seus cidadãos possam corresponder aos desafios de uma sociedade digital cada vez mais exigente. Estas exigências implicam que neste processo os cidadãos adquiram uma literacia digital que lhes permitam estarem infoincluídos.
Contudo, todos os dados referem que os cidadãos mais idosos são aqueles que apresentam os maiores níveis de infoexclusão. Este artigo tem como objetivo apresentar os principais resultados e conclusões de uma investigação do projeto PerSoParAge - Recursos pessoais e sociais para a autonomia e participação social numa sociedade envelhecida. Foram envolvidos nesta investigação cidadãos entre os 55 e os 64 anos
dos distritos de Castelo Branco, Guarda e Portalegre, a fim de se investigar a sua relação com as Tecnologias de Informação e Comunicação e a aprendizagem ao longo da vida. Foi possível averiguar-se que as Tecnologias de Informação e Comunicação podem promover uma mais adequada inclusão social desta
população envelhecida ao lhes conferir um maior empoderamento que, conjuntamente com a também promoção da aprendizagem ao longo da vida, lhes proporcione um mais adequado processo de envelhecimento na sociedade digital.
Information and communication technologies play an increasingly important role in society, in the sense that all areas and professions make use of digital resources. The school can not be brushed off this reality, aim to create full subjects and integrated in society today. Educational software can be used very early in the education of children, but they must be carefully and monitoring. This article aims to present the results of the use of educational software in English to the awareness of context with children of pre-school education in kindergarten, nursery center Redemptorist Fathers - The smallest fox in White Castle, a 21 group children under 5 years. Early awareness of foreign language such as English can be started with digital multimedia capabilities and various software available on the market. However, the small study described the case reveals some resistance from parents and educators, in the preparation of these to choose and monitor the use of ICT by children, in addition to also highlight the self-interest of the children involved and their learning a few words in English language in different contexts of daily worked. The study opens perspectives on close monitoring needs of such uses and training of educators in the field of use of resources multilingual awareness in pre-school education.
This article aims to reflect on the impact of Information and Communication Technologies (ICT) in the educational context, focusing on the potential contributions of the use of Digital Educational Resources (RED) in the process of teaching and learning. For this purpose, the results of the use of the RED will be presented:. Digital Classroom - The World's 1st Year Carochinha The study was accomplished in a class of the 1st grade of the 1st CEB, composed of 27 students, aged 6-7 years in Castelo Branco City Schools Group within the Supervised Teaching Practice. The results obtained after the analysis and processing of the data showed that when using this RED students show they have acquired the content covered by the fact that they enhanced levels of greater interest, commitment, motivation, commitment and initiative in the course of activities proposals. But, perhaps because they are students of 1st year of the 1st CEB, do not neglect the presence and monitoring of the teacher and the use of paper-based resources. This means that there should be a complementarity that reconciles the human factor (teacher), with the use of digital media resources and paper support resources (Manual).
