Caracterização de um efectivo de bovinos de Raça Mirandesa explorados em regime extensivo
Galvão, António José Leão Travassos
2010
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“Copyright © [2009] IEEE. Reprinted from Next Generation Internet Network. NGI '09). ISBN:978-1-4244-4244-7. 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.”
Vehicular Delay-Tolerant Networking (VDTN) is a Delay-Tolerant Network (DTN) based architecture concept for transit networks, where vehicles movement and their bundle relaying service is opportunistically exploited to enable non-real time applications, under environments prone to connectivity disruptions, network partitions and potentially long delays. In VDTNs, network resources may be limited, for instance due to physical constraints of the network nodes. In order to be able to prioritize applications traffic according to its requirements in such constrained scenarios, traffic differentiation mechanisms must be introduced at the VDTN architecture. This work considers a priority classes of service (CoS) model and investigates how different buffer management strategies can be combined with drop and scheduling policies, to provide strict priority based services, or to provide custom allocation of network resources. The efficiency and tradeoffs of these proposals is evaluated through extensive simulation.
Vehicular Delay-Tolerant Network (VDTN) appears as a particular application of the Delay-Tolerant Network (DTN) concept to transit networks. In this paper we analyze the use of a VDTN to provide asynchronous Internet access on a rural remote region scenario. Through simulation we evaluate the impact of a shortest path based movement model on the performance of four DTN routing protocols in respect to message delivery probability and message average delay.
“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 © [2009] IEEE. Reprinted from Second International Conference on Communication Theory Reliability, and Quality of Service, 2009. CTRQ'09. ISBN:978-1-4244-4423-6. 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 © [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.”
Vehicular Delay-Tolerant Networking (VDTN) was proposed as a new variant of a delay/disruptive-tolerant network, designed for vehicular networks. These networks are subject to several limitations including short contact durations, connectivity disruptions, network partitions, intermittent connectivity, and long delays. To address these connectivity issues, an asynchronous, store-carry-and-forward paradigm is combined with opportunistic bundle replication, to achieve multi-hop data delivery. Since VDTN networks are resource-constrained, for example in terms of communication bandwidth and storage capacity, a key challenge is to provide scheduling and dropping policies that can improve the overall performance of the network. This paper investigates the efficiency and tradeoffs of several scheduling and dropping policies enforced in a Spray and Wait routing scheme. It has been observed that these policies should give preferential treatment to less replicated bundles for a better network performance in terms of delivery ratio and average delivery delay.
Vehicular delay-tolerant networks (VDTNs) appear as an alternative to provide low cost asynchronous internet access on developing countries or isolated regions, enabling non-real time services, such as e-mail, web access, telemedicine, environmental monitoring and other data collection applications. VDTNs are based on the delay-tolerant network (DTN) concept applied to vehicular networks, where vehicles mobility is used for connectivity.
This paper considers a rural connectivity scenario and investigates how different mobility patterns and vehicle densities influence the performance of DTN routing protocols applied to VDTN networks. Moreover, routing protocols parameters are also changed in the present study. We analyse their effect on the performance of VDTNs through the bundle delivery ratio and the bundle average delay.
We expect that this contribution will provide a deep understanding about implications of movement models on the performance of VDTNs applied to rural scenarios, leading to insights for future routing algorithm theoretic study and protocol design.
Based on the concepts of Delay-Tolerant Network (DTN) and Opportunistic Networks, Vehicular opportunistic networks have been proposed to interconnect developing communities, or to implement disaster recovery networks when all other networks fail. Other possible application scenarios for these networks include traffic monitoring, accident warnings, advertisements, and information retrieval applications. The diversity of these network environments introduces challenging issues related to the architecture, protocol designs, interoperability, security, management, and stability of vehicular opportunistic networks. Furthermore, these networks are characterized by variable and intermittent connectivity and frequent network partition. The store-carry-and forward strategy can be used to cope with disconnections. However, in sparse networks with low node density, this strategy may be complemented with the introduction of stationary relay nodes into the network. These nodes are placed along vehicle's routes and create additional transmission opportunities. Therefore, when correctly positioned they will contribute to augment the message delivery ratio. This chapter investigates recent advances related to the deployment of stationary relay nodes on vehicular opportunistic networks. Furthermore, it presents a study that evaluates the impact of adding stationary relay nodes on the performance of DTN routing protocols applied to vehicular opportunistic networks. Two distinct environments were considered, rural and urban scenarios. Each of them combines different application scenarios, map areas, node density, and vehicle movement models. For both scenarios, results show that stationary relay nodes increase the number of contacts between network nodes, improving the overall performance of the network in terms of message delivery ratio.
“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.”
Over the years some medical studies have tried to better understand the internal
behavior of human beings. Many researchers in this domain have been striving to find
relationships between intra-vaginal temperature and certain female health conditions, such
as ovulation and fertile period since woman’s intra-vaginal temperature is one of the body
parameters most preferred in such studies. However, due to lack of a appropriate
technology, medical research devoted to studying correlations of such body parameters
with certain womans’ body phenomena could not obtain better results. This article presents
the design and implementation of a novel intra-body sensor for acquisition and monitoring
of intra-vaginal temperatures. This novel intra-body sensor provides data collection that is
used for studying the relation between temperature variations and female health conditions,
such as anticipation and monitoring of the ovulation period, detection of pregnancy
contractions, preterm labor prevention, etc.. The motivation for this work focuses on the
development of this new intra-body sensor that will represent a major step in medical
technology. The novel sensor was tested and validated on hospitalized women as well as
normal healthy women. Finally our medical team has attested to the accuracy, usability and
performance of this novel intra-body sensor.
“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.”
Vehicular networks experience a number of unique challenges due to the high mobility of vehicles and highly dynamic network topology, short contact durations, disruption intermittent connectivity, significant loss rates, node density, and frequent network fragmentation. All these issues have a profound impact on routing strategies in these networks. This paper gives an insight about available solutions on related literature for vehicular communications. It overviews and compares the most relevant approaches for data communication in these networks, discussing their influence on routing strategies. It intends to stimulate research and contribute to further advances in this rapidly evolving area where many key open issues that still remain to be addressed are identified.
“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 © [2008] IEEE. Reprinted from Global Telecommunications Conference. (GLOBECOM 2008).IEEE ISBN:978-1-4244-2324-8.
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 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 International Conference on Parallel Processing Workshops ICPPW '09.ISSN:1530-2016. 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.”
BOLETIM DA PROPRIEDADE INDUSTRIAL
No 2010/10/27 (208/2010) 27 de OUTUBRO de 2010
This paper presents a study on three simulation tools for Wireless Sensor Nertworks (WSNs): Network Simulator 2 (ns-2), Java Simulator (J-Sim) and Sensor Network Emulator and Simulator (SENSE). We present the concept of WSNs, each simulator in terms of its features, a view on current applications of WSNs on medicine and a comparative study on the simulators studied. We conclude that SENSE presents the better approach for WSNs.
Wireless Body Sensors for medical purposes offer valuable contributions to improve patients’ healthcare, including diagnosis and/or therapeutics monitoring. Body temperature is a crucial parameter in healthcare diagnosis. In gynecology and obstetrics it is measured at the skin’s surface, which is very influenced by the environment. This paper proposes a new intra-body sensor for long-term intra-vaginal temperature collection. The embedded IEEE 802.15.4 communication module allows the integration of this sensor in a Wireless Sensor Network (WSN) for remote data access and monitoring. We present the sensor architecture, the construction of the corresponding testbed, and its performance evaluation. This sensor may be used in different medical applications, including preterm labor prevention and fertility and ovulation period detection. The features of the constructed testbed were validated in laboratory tests verifying its accuracy and performance.
“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 © [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.”
“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.”
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.”
The detection of fertile and ovulation periods may
be performed by women’s body temperature variations. These
variations are more accurate if a core-body temperature for
their detection is used. Previous medical studies concluded that
the use of skin temperature could be influenced by
environmental conditions. Since the increasing of the body
temperature in this period is only about 0.5 ºC, it is crucial that
measurements should be the most accurate as possible. Due to
the lack of solutions to realize that in order to measure and
analyze the core-body temperature, this paper presents a
system to capture, display, and monitoring core-body
temperature. It is considered a hardware solution (sensor) to be
placed inside cervix and a computer application to
communicate and gather the collected data by the sensor.
Bluetooth is used to perform the communication between a
computer and the sensor. The system evaluation is performed
by a medical team in several volunteer women. Furthermore,
the collected data by the sensor may be used to study the
relation between temperature variations and women health
conditions.
Recently, Google launched the Android mobile operating system
and several mobile devices already support it. This paper
proposes a mobile Android-enabled tool for collecting,
monitoring, and analyzing intra-vaginal temperature. A previous
proposed intra-vaginal sensor acquires temperature values and
sends the collected data to Android device over a Bluetooth
connection. The Android tool allows women for real-time
monitoring of their temperature with mobility support and
following their daily life. Woman can control and detect their
fertile and ovulation periods when this human parameter
increases about 0.5ºC over their regular temperature. Other
application of this solution includes the preterm labor
prevention. The proposed system was evaluated and validated,
and it is ready for use.
Sensor nodes are small devices able to collect and retrieve
sensorial data. The use of these sensors for medical purposes
offers valuable contributions to improve patients’ healthcare, both
for diagnosis and therapeutics monitoring. An important and
common parameter used on healthcare diagnosis is the body
temperature. It is monitored on several matters related with
gynecological and obstetrics issues but, usually it is measure at
the skin surface. Then, this paper proposes the design concepts of
a new intra-body sensor for long-term intra-vaginal temperature
collection. The embedded IEEE 802.15.4 communication module
allows the integration of this sensor in wireless sensor networks
for remote data access and monitoring. It is presented the sensor
architecture, the construction of the corresponding testbed, and its
performance evaluation. This sensor may be used on several
applications, including fertile and ovulation period detection, and
preterm labor prevention.
A aplicação de novas contribuições científicas para a
análise de processos fisiológicos deu origem a uma nova era na
medicina, introduzindo técnicas e dispositivos para medição e
monitorização de parâmetros fisiológicos. Este trabalho tem
como objectivo a apresentação de um novo sensor de
temperatura para medição e monitorização da temperatura
intra-vaginal. Esta monitorização irá permitir estudar as
variações deste parâmetro biológico ao longo de determinado
período de tempo, como por exemplo, ao longo de todo um ciclo
menstrual ou durante um dos dias desse ciclo. O conhecimento do
comportamento deste parâmetro biológico poderá ser
extremamente útil do ponto de vista clínico. Com base nesse
conhecimento e nas suas correlações com determinados estados
sintomáticos da fisiologia feminina, poderá ser possível estudar e
propor novos métodos para combater a infertilidade dos casais,
antecipar e monitorizar o período fértil (podendo ser usado, tanto
para ajudar a favorecer a gravidez como apoio a métodos de
anti-concepção), propor e ajustar terapêuticas de tratamento de
inúmeras doenças ginecológicas, desenvolver novos métodos
anti-concepcionais e ajuda à prevenção de partos pré-termo. O
protótipo do sistema foi testado e validado com sucesso, estando
pronto para utilização.
“Copyright © [2010] IEEE. Reprinted from 16th International Conference on Software, Telecommunications and Computer Networks. SoftCOM 2008. ISBN:978-953-6114-97-9. 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.”
Vehicular Delay-Tolerant Network (VDTN) is a new disruptive network architecture where vehicles act as the communication infrastructure. VDTN follows a layered architecture based on control and data planes separation, and positioning the bundle layer under the network layer. VDTN furnishes low-cost asynchronous communications coping with intermittent and sparse connectivity, variable delays and even no end-to-end connection. This paper presents a VDTN prototype (testbed) proposal, which implements and validates the VDTN layered architecture considering the proposed out-of-band signaling. The main goals of the prototype are emulation, demonstration, performance evaluation, and diagnose of protocol stacks and services, proving the applicability of VDTNs over a wide range of environments.
