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1.
PLoS One ; 15(5): e0232405, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32357170

RESUMO

Industrial networks are currently the only communication means designed for real-time systems used in industry. Networked control systems (NCS) are still important and commonly used type of such systems operating on shop floor. As a computerized node of NCS, a programmable logic controller (PLC) is usually used. In most cases, contemporary devices of such kind are equipped with more than one network interface of various types. Typically, only one interface is activated in NCS. Sometimes, the other is used for communication between NCS and supervisory systems. Occasionally, it is additionally involved in the data transmission in the factory IT systems. In general, however, using a single network interface is a more common solution. In this paper, the mutual utilization of more than one interface is discussed in order to back up the NCS network and to manage the node-related traffic within the scope of higher level services. The question of dependability of such a system from the electromagnetic compatibility point of view is discussed. The example is provided based on Profinet via wired and wireless connection.


Assuntos
Redes de Comunicação de Computadores , Tecnologia sem Fio , Automação/instrumentação , Redes de Comunicação de Computadores/instrumentação , Sistemas Computacionais , Instalação Elétrica , Fenômenos Eletromagnéticos , Indústrias/instrumentação , Tecnologia sem Fio/instrumentação
2.
PLoS One ; 15(3): e0228844, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32155156

RESUMO

The data layer devices in the Software Defined Network (SDN) play an important role in packet forwarding. However, whether the forwarding task can be efficiently completed by the node has not attracted enough attention. A method called TrustBlock is proposed in this paper, which introduces trust as a security attribute in SDN routing planning. Besides, in order to enhance the integrity and controllability of trust evaluation, the double-layer blockchain architecture is established. In the first layer, the behavior data of the node is recorded, and then the trust calculation is performed in the second layer. In the evaluation model, nodes' trust is calculated from three aspects: direct trust, indirect trust and historical trust. Firstly, from the perspective of security, blockchain is used to achieve identity authentication of nodes, after that, from the perspective of reliability, the forwarding status is used to calculate the trust value. Secondly, consensus algorithm is used to filter malicious recommendation trust value and prevent colluding attacks. Finally, the adaptive historical trust weight is designed to prevent the periodic attack. In this paper, the entropy method is used to determine the weight of each evaluation attribute, which can avoid the problem that the subjective judgment method is not adaptable to the weight setting. Simulation results show that the detection rate of the TrustBlock is up to 98.89%, which means this model can effectively identify the abnormal nodes in SDN. Moreover, it is attractive in terms of integrity and controllability.


Assuntos
Redes de Comunicação de Computadores/instrumentação , Tecnologia de Sensoriamento Remoto/métodos , Algoritmos , Blockchain , Modelos Teóricos , Tecnologia de Sensoriamento Remoto/instrumentação , Projetos de Pesquisa , Software
3.
Int J Med Inform ; 137: 104098, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32066084

RESUMO

METHODS: The aim of the paper is twofold. First, we present Starviewer, a DICOM viewer developed in C++ with a core component built on top of open-source libraries. The viewer supports extensions that implement functionalities and front-ends for specific use cases. Second, we propose an adaptable evaluation framework based on a set of criteria weighted according to user needs. The framework can consider different user profiles and allow criteria to be decomposed in subcriteria and grouped in more general categories making a multi-level hierarchical structure that can be analysed at different levels of detail to make scores interpretation more comprehensible. RESULTS: Different examples to illustrate Starviewer functionalities and its extensions are presented. In addition, the proposed evaluation framework is used to compare Starviewer with four open-source viewers regarding their functionalities for daily clinical practice. In a range from 0 to 10, the final scores are: Horos (7.7), Starviewer (6.2), Weasis (6.0), Ginkgo CADx (4.1), and medInria (3.8). CONCLUSIONS: Starviewer provides basic and advanced features for daily image diagnosis needs as well as a modular design that enables the development of custom extensions. The evaluation framework is useful to understand and prioritize new development goals, and can be easily adapted to express different needs by altering the weights. Moreover, it can be used as a complement to maturity models.


Assuntos
Redes de Comunicação de Computadores/instrumentação , Gráficos por Computador , Apresentação de Dados/normas , Modelos Biológicos , Sistemas de Informação em Radiologia/instrumentação , Software , CD-ROM , Redes de Comunicação de Computadores/normas , Humanos , Processamento de Imagem Assistida por Computador/normas , Intensificação de Imagem Radiográfica , Sistemas de Informação em Radiologia/normas , Tomografia Computadorizada por Raios X
4.
Sensors (Basel) ; 20(3)2020 Feb 03.
Artigo em Inglês | MEDLINE | ID: mdl-32028736

RESUMO

The growing need for food worldwide requires the development of a high-performance, high-productivity, and sustainable agriculture, which implies the introduction of new technologies into monitoring activities related to control and decision-making. In this regard, this paper presents a hierarchical structure based on the collaboration between unmanned aerial vehicles (UAVs) and federated wireless sensor networks (WSNs) for crop monitoring in precision agriculture. The integration of UAVs with intelligent, ground WSNs, and IoT proved to be a robust and efficient solution for data collection, control, analysis, and decisions in such specialized applications. Key advantages lay in online data collection and relaying to a central monitoring point, while effectively managing network load and latency through optimized UAV trajectories and in situ data processing. Two important aspects of the collaboration were considered: designing the UAV trajectories for efficient data collection and implementing effective data processing algorithms (consensus and symbolic aggregate approximation) at the network level for the transmission of the relevant data. The experiments were carried out at a Romanian research institute where different crops and methods are developed. The results demonstrate that the collaborative UAV-WSN-IoT approach increases the performances in both precision agriculture and ecological agriculture.


Assuntos
Redes de Comunicação de Computadores/instrumentação , Tecnologia sem Fio/instrumentação , Produtos Agrícolas , Coleta de Dados , Humanos , Tecnologia de Sensoriamento Remoto
5.
PLoS One ; 15(1): e0226649, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31910202

RESUMO

The fundamental utility of the Large-Scale Visual Sensor Networks (LVSNs) is to monitor specified events and to transmit the detected information back to the sink for achieving the data aggregation purpose. However, the events of interest are usually not uniformly distributed but frequently detected in certain regions in real-world applications. It implies that when the events frequently picked up by the sensors in the same region, the transmission load of LVSNs is unbalanced and potentially cause the energy hole problem. To overcome this kind of problem for network lifetime, a Comprehensive Visual Data Gathering Network Architecture (CDNA), which is the first comparatively integrated architecture for LVSNs is designed in this paper. In CDNA, a novel α-hull based event location algorithm, which is oriented from the geometric model of α-hull, is designed for accurately and efficiently detect the location of the event. In addition, the Chi-Square distribution event-driven gradient deployment method is proposed to reduce the unbalanced energy consumption for alleviating energy hole problem. Moreover, an energy hole repairing method containing an efficient data gathering tree and a movement algorithm is proposed to ensure the efficiency of transmitting and solving the energy hole problem. Simulations are made for examining the performance of the proposed architecture. The simulation results indicate that the performance of CDNA is better than the previous algorithms in the realistic LVSN environment, such as the significant improvement of the network lifetime.


Assuntos
Algoritmos , Redes de Comunicação de Computadores/instrumentação , Processamento Eletrônico de Dados/métodos , Interpretação de Imagem Assistida por Computador/métodos , Modelos Teóricos , Reconhecimento Automatizado de Padrão/métodos , Tecnologia sem Fio/instrumentação , Simulação por Computador , Processamento Eletrônico de Dados/instrumentação , Humanos , Percepção Visual
6.
Sensors (Basel) ; 19(21)2019 Oct 25.
Artigo em Inglês | MEDLINE | ID: mdl-31731446

RESUMO

Internet of Things (IoT) is the paradigm that has largely contributed to the development of smart buildings in our society. This technology makes it possible to monitor all aspects of the smart building and to improve its operation. One of the main challenges encountered by IoT networks is that the the data they collect may be unreliable since IoT devices can lose accuracy for several reasons (sensor wear, sensor aging, poorly constructed buildings, etc.). The aim of our work is to study the evolution of IoT networks over time in smart buildings. The hypothesis we have tested is that, by amplifying the Lotka-Volterra equations as a community of living organisms (an ecosystem model), the reliability of the system and its components can be predicted. This model comprises a set of differential equations that describe the relationship between an IoT network and multiple IoT devices. Based on the Lotka-Volterra model, in this article, we propose a model in which the predators are the non-precision IoT devices and the prey are the precision IoT devices. Furthermore, a third species is introduced, the maintenance staff, which will impact the interaction between both species, helping the prey to survive within the ecosystem. This is the first Lotka-Volterra model that is applied in the field of IoT. Our work establishes a proof of concept in the field and opens a wide spectrum of applications for biology models to be applied in IoT.


Assuntos
Habitação , Internet , Modelos Teóricos , Redes de Comunicação de Computadores/instrumentação , Ecossistema , Dinâmica Populacional , Temperatura
7.
Med Biol Eng Comput ; 57(12): 2757-2769, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31741289

RESUMO

In this work, the IEEE 802.11af technology-based wireless sensor network for health data monitoring with priority classes is proposed. In IEEE 802.11af technology, a White Space Device (WSD), a Station (STA), and an Access Point (AP) communicate through television white spectrum opportunistically without causing any harmful interference to licensed` services. In the proposed network; WSDs, STA, and AP employ Frequency Division Multiple Access (FDMA) technique with the aim of communicating through the white space spectrum determined by White Space Map (WSM). WSD collects health data such as body temperature and blood pressure from an implant or on-body sensors. The priority class is determined according to the emergency of a patient as red, yellow, and green. After obtaining the analytical model of the proposed network, the simulation model is carried out using Riverbed Modeler. The graphical results prove the validity and applicability of the proposed network in terms of delay (0.17 s) and energy consumption (4.7 mJ/s) without any spectrum cost for priority-based health data monitoring. Graphical abstract Cognitive radio based IEEE 802.11af environment for priority based health data monitoring.


Assuntos
Redes de Comunicação de Computadores/instrumentação , Monitorização Fisiológica/instrumentação , Monitorização Fisiológica/métodos , Algoritmos , Pressão Sanguínea/fisiologia , Temperatura Corporal/fisiologia , Registros de Saúde Pessoal , Humanos , Tecnologia sem Fio
8.
J Med Syst ; 43(10): 308, 2019 Aug 20.
Artigo em Inglês | MEDLINE | ID: mdl-31432270

RESUMO

New, emerging technologies, transform every day our life and have direct consequence on our health and well-being. More and more wearable medical devices (MD) with wireless communication technologies embedded are being developed by innovative academic community and companies. Optical wireless communication (OWC) consisting of Visible Light Communication (VLC), infrared (IR), Optical Camera Communication (OCC) and Light Fidelity (LiFi) along with the conventional Radio Frequency (RF) wireless communication are suitable technologies to be used for hybrid Wireless Integrated Medical Assistance Systems (WIMAS). The WIMAS addressed in this paper consists of two Wireless Medical Body Area Networks (WMBAN) (an insulin wearable kit and an ECG test device with VLC/OCC are considered) and an Emergency Remote Medical Assistance (ERMA) with LiFi technology embedded. Using RF in medical facilities is subject of strict regulations due to interferences with other RF medical devices, negative effects on human health and lack of security. VLC and OCC are suitable to be embedded in MDs in order to be used by the patients with wearable WMBAN. Research on IR transdermal communication for implantable MDs has also been demonstrated as feasible and both VLC and OCC have promising future, as well. On the other hand, LiFi technology, recently deployed on the market, is mature enough to be integrated in the ERMA system addressed here.


Assuntos
Redes de Comunicação de Computadores/instrumentação , Monitorização Ambulatorial/instrumentação , Dispositivos Eletrônicos Vestíveis , Tecnologia sem Fio/instrumentação , Segurança Computacional , Desenho de Equipamento , Humanos , Luz , Telemedicina
9.
Radiat Prot Dosimetry ; 187(2): 191-214, 2019 Dec 31.
Artigo em Inglês | MEDLINE | ID: mdl-31297514

RESUMO

Since EMF levels from wireless telecommunication networks are non-stationary and exhibit large temporal variations, the use of continuous measurements during extended periods (preferably 24 h or longer) with a data-logging system is required. Because of the short-term variations of E field, the 6-min measurements and 6-min averaged results to obtain the mean level strength at a given place appear to be dependent on the time of measurements during the day. This paper presents a new (integral-based) measure to evaluate electromagnetic exposure. The new measure is a pure physical descriptor of the amount of exposed energy density (a parameter accumulated from instantaneous power density values in time). To confirm previous observations, continuous measurements with personal exposure metre were recorded 24 h a day for two weeks at every location in urban area, 14 different locations in total. Additionally, to check temporal variations and repeatability of exposure assessment, a week of prolonged measurements was taken 6 months later, making in total three weeks of measurements at 2 locations. Day-to-day repeatability of RF-EMF exposure was analysed through the time-averaged and integral-based measure. The analysis is based on approximately 5.1 million data samples (1.7 million for each band). The ratio between the maximum and minimum instantaneous (maximum and minimum 6-min averaged) E field values during the day could reach up to 25 dB (20 dB). Therefore, great variability in the results may occur. By applying the 24 h time-averaged and integral-based measure on a 24 h data set of measurements, the variability of daily exposure could stay within ±20% of the week mean level obtained either with the time-averaged or integral-based measure. Both, the time-averaged E field and integral-based power density exposures of the general public in all locations were found to be well below the general public exposure limits of the ICNIRP guidelines.


Assuntos
Redes de Comunicação de Computadores/instrumentação , Campos Eletromagnéticos , Exposição Ambiental/análise , Monitoramento de Radiação/métodos , Ondas de Rádio , Humanos , Avaliação de Resultados em Cuidados de Saúde
10.
PLoS One ; 14(4): e0214518, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30939154

RESUMO

An efficiently unlimited address space is provided by Internet Protocol version 6 (IPv6). It aims to accommodate thousands of hundreds of unique devices on a similar link. This can be achieved through the Duplicate Address Detection (DAD) process. It is considered one of the core IPv6 network's functions. It is implemented to make sure that IP addresses do not conflict with each other on the same link. However, IPv6 design's functions are exposed to security threats like the DAD process, which is vulnerable to Denial of Service (DoS) attack. Such a threat prevents the host from configuring its IP address by responding to each Neighbor Solicitation (NS) through fake Neighbor Advertisement (NA). Various mechanisms have been proposed to secure the IPv6 DAD procedure. The proposed mechanisms, however, suffer from complexity, high processing time, and the consumption of more resources. The experiments-based findings revealed that all the existing mechanisms had failed to secure the IPv6 DAD process. Therefore, DAD-match security technique is proposed in this study to efficiently secure the DAD process consuming less processing time. DAD-match is built based on SHA-3 to hide the exchange tentative IP among hosts throughout the process of DAD in an IPv6 link-local network. The obtained experimental results demonstrated that the DAD-match security technique achieved less processing time compared with the existing mechanisms as it can resist a range of different threats like collision and brute-force attacks. The findings concluded that the DAD-match technique effectively prevents the DoS attack during the DAD process. The DAD-match technique is implemented on a small area IPv6 network; hence, the author future work is to implement and test the DAD-match technique on a large area IPv6 network.


Assuntos
Redes de Comunicação de Computadores/instrumentação , Segurança Computacional , Tecnologia sem Fio , Algoritmos , Simulação por Computador , Sistemas Computacionais , Coleta de Dados , Armazenamento e Recuperação da Informação/métodos , Internet , Registros
11.
Sensors (Basel) ; 19(5)2019 Feb 26.
Artigo em Inglês | MEDLINE | ID: mdl-30813516

RESUMO

The design of wireless sensor nodes for animal tracking is a multidisciplinary activity that presents several research challenges both from a technical and a biological point of view. A monitoring device has to be designed accounting for all system requirements including the specific characteristics of animals and environment. In this work we present some aspects of the design of a wireless sensor node to track and monitor the pink iguana of the Galápagos: a recently discovered species living in remote locations at the Galápagos Islands. The few individuals of this species live in a relatively small area that lacks of any available communication infrastructure. We present and discuss the energy harvesting architecture and the related energy management logic. We also discuss the impact of packaging on the sensor performance and the consequences of the limited available energy on the GPS tracking.


Assuntos
Iguanas/fisiologia , Tecnologia sem Fio/instrumentação , Animais , Cor , Redes de Comunicação de Computadores/instrumentação , Fenômenos Físicos , Tecnologia de Sensoriamento Remoto/instrumentação
12.
PLoS One ; 14(3): e0212407, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30840649

RESUMO

This work discusses video communications over wireless networks (IEEE 802.11ac standard). The videos are in three different resolutions: 720p, 1080p, and 2160p. It is essential to study the performance of these media in access technologies to enhance the current coding and communications techniques. This study sets out a video quality prediction model that includes the different resolutions that are based on wireless network terms and conditions, an approach that has not previously been adopted in the literature. The model involves obtaining Service and Experience Quality Metrics, such as PSNR (Peak Signal-to-Noise Ratio) and packet loss. This article outlines a methodology and mathematical model for video quality loss in the wireless network from simulated data and its accuracy is ensured through the use of performance metrics (RMSE and Standard Deviation). The methodology is based on two mathematical functions, (logarithmic and exponential), and their parameters are defined by linear regression. The model obtained RMSE values and standard deviation of 2.32 dB and 2.2 dB for the predicted values, respectively. The results should lead to a CODEC (Coder-Decoder) improvement and contribute to a better wireless networks design.


Assuntos
Gravação em Vídeo/métodos , Tecnologia sem Fio/instrumentação , Algoritmos , Redes de Comunicação de Computadores/instrumentação , Modelos Teóricos
13.
PLoS One ; 13(12): e0208168, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30517167

RESUMO

This paper proposes a power-system protection device designed to be integrated in smart environments based on Internet-of-Things technologies. The proposed system enhances electrical safety by fast disconnection of the power supply in case of fault events like leakage current, electrical arc, overcurrent or overvoltage and has been designed with the goal to be integrated in smart environments like smart homes or smart cities for protecting the electrical equipment. The system also enables real-time monitoring and notification events through an advanced communication interface using a data concentrator architecture. This paper provides an extended description of the proposed system's design and implementation, as well as the experimental validation results.


Assuntos
Fontes de Energia Elétrica , Segurança de Equipamentos/instrumentação , Redes de Comunicação de Computadores/instrumentação , Eletricidade , Humanos , Internet
14.
PLoS One ; 13(10): e0205092, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30339704

RESUMO

Modeling of background radiation for the urban environment plays an important role in homeland security. However, background radiation is difficult to assess due to its spatial-temporal fluctuations caused by the variation in soil composition, building materials, and weather patterns etc. To address the challenge of background radiation modeling, we developed a mobile sensor network to continuously monitor the background radiation; we also proposed a maximum likelihood estimation algorithm to decouple and estimate the background's spatial distribution and temporal fluctuation. Experimental results demonstrated how this background radiation monitoring system accurately recognized high background regions in the experimental area, and successfully captured temporal fluctuation trends of background radiation during rains. Our system provides an efficient solution to model the temporal fluctuation and spatial distribution of background radiation.


Assuntos
Radiação de Fundo , Redes de Comunicação de Computadores/instrumentação , Monitoramento Ambiental/instrumentação , Monitoramento Ambiental/métodos , Monitoramento de Radiação/instrumentação , Monitoramento de Radiação/métodos , Algoritmos , Telefone Celular , Funções Verossimilhança , Análise de Regressão , Análise Espaço-Temporal , Tempo (Meteorologia) , Tecnologia sem Fio
15.
Sensors (Basel) ; 18(10)2018 Oct 19.
Artigo em Inglês | MEDLINE | ID: mdl-30347649

RESUMO

The application of a Bluetooth skin resistance sensor in assisting people with Autism Spectrum Disorders (ASD), in their day-to-day work, is presented in this paper. The design and construction of the device are discussed. The authors have considered the best placement of the sensor, on the body, to gain the most accurate readings of user stress levels, under various conditions. Trial tests were performed on a group of sixteen people to verify the correct functioning of the device. Resistance levels were compared to those from the reference system. The placement of the sensor has also been determined, based on wearer convenience. With the Bluetooth Low Energy block, users can be notified immediately about their abnormal stress levels via a smartphone application. This can help people with ASD, and those who work with them, to facilitate stress control and make necessary adjustments to their work environment.


Assuntos
Transtorno do Espectro Autista/psicologia , Redes de Comunicação de Computadores/instrumentação , Pele/fisiopatologia , Tecnologia sem Fio/instrumentação , Local de Trabalho/psicologia , Humanos , Smartphone/instrumentação
16.
J Chem Inf Model ; 58(6): 1154-1160, 2018 06 25.
Artigo em Inglês | MEDLINE | ID: mdl-29746777

RESUMO

The manuscript describes WarpEngine, a novel platform implemented within the VEGA ZZ suite of software for performing distributed simulations both in local and wide area networks. Despite being tailored for structure-based virtual screening campaigns, WarpEngine possesses the required flexibility to carry out distributed calculations utilizing various pieces of software, which can be easily encapsulated within this platform without changing their source codes. WarpEngine takes advantages of all cheminformatics features implemented in the VEGA ZZ program as well as of its largely customizable scripting architecture thus allowing an efficient distribution of various time-demanding simulations. To offer an example of the WarpEngine potentials, the manuscript includes a set of virtual screening campaigns based on the ACE data set of the DUD-E collections using PLANTS as the docking application. Benchmarking analyses revealed a satisfactory linearity of the WarpEngine performances, the speed-up values being roughly equal to the number of utilized cores. Again, the computed scalability values emphasized that a vast majority (i.e., >90%) of the performed simulations benefit from the distributed platform presented here. WarpEngine can be freely downloaded along with the VEGA ZZ program at www.vegazz.net .


Assuntos
Redes de Comunicação de Computadores , Software , Biologia Computacional/instrumentação , Redes de Comunicação de Computadores/instrumentação , Gráficos por Computador/instrumentação , Descoberta de Drogas/instrumentação , Desenho de Equipamento
17.
PLoS One ; 13(5): e0196818, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29734355

RESUMO

Wireless ad hoc networks can experience extreme fluctuations in transmission traffic in the Internet of Things, which is widely used today. Currently, the most crucial issues requiring attention for wireless ad hoc networks are making the best use of low traffic periods, reducing congestion during high traffic periods, and improving transmission performance. To solve these problems, the present paper proposes a novel cross-layer transmission model based on decentralized coded caching in the physical layer and a content division multiplexing scheme in the media access control layer. Simulation results demonstrate that the proposed model effectively addresses these issues by substantially increasing the throughput and successful transmission rate compared to existing protocols without a negative influence on delay, particularly for large scale networks under conditions of highly contrasting high and low traffic periods.


Assuntos
Redes de Comunicação de Computadores/instrumentação , Internet/instrumentação , Tecnologia sem Fio/instrumentação , Algoritmos , Simulação por Computador
19.
Disabil Rehabil Assist Technol ; 13(7): 674-675, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28830267

RESUMO

Environmental Control Units (ECU) are devices or a system that allows a person to control appliances in their home or work environment. Such system can be utilized by clients with physical and/or functional disability to enhance their ability to control their environment, to promote independence and improve their quality of life. Over the last several years, there have been an emergence of several inexpensive, commercially-available, voice activated smart speakers into the market such as Google Home and Amazon Echo. These smart speakers are equipped with far field microphone that supports voice recognition, and allows for complete hand-free operation for various purposes, including for playing music, for information retrieval, and most importantly, for environmental control. Clients with disability could utilize these features to turn the unit into a simple ECU that is completely voice activated and wirelessly connected to appliances. Smart speakers, with their ease of setup, low cost and versatility, may be a more affordable and accessible alternative to the traditional ECU. Implications for Rehabilitation Environmental Control Units (ECU) enable independence for physically and functionally disabled clients, and reduce burden and frequency of demands on carers. Traditional ECU can be costly and may require clients to learn specialized skills to use. Smart speakers have the potential to be used as a new-age ECU by overcoming these barriers, and can be used by a wider range of clients.


Assuntos
Redes de Comunicação de Computadores/instrumentação , Pessoas com Deficiência/reabilitação , Ambiente Controlado , Equipamentos de Autoajuda , Austrália , Humanos , Armazenamento e Recuperação da Informação/métodos , Internet , Televisão
20.
Technol Health Care ; 26(1): 29-41, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29060951

RESUMO

BACKGROUND: Local hospitals must deal with large numbers of patients during mass casualty incidents, and the wireless sensor networks (WSNs) can help in these situations by monitoring vital signs. Conventional ZigBee nodes can obtain the ID of a device by assigning a unique 16-bit short address or by burning firmware into an IC. These methods tend to complicate node management and lack portability. OBJECTIVE: The study developed a node management mechanism to deal with a large number of patients in real-time, through the wireless monitoring of physiological signals. The mechanism proposed for the ZigBee WSN is based on a three-layer (Coordinator, Control Router, and End Device) tree topology. METHODS: The proposed system includes a node deployment process to formulate a ZigBee WSN as a tree topology, an algorithm to automatically number ZigBee nodes for monitoring and control system (MCS), and an algorithm to automatically obtain the short addresses of nodes for data collection. Specifically, an algorithm automatically collects data from ZigBee nodes for display on a computer graphical user interface (GUI). We also developed a reliable data transmission method capable of resolving the problem of packet loss. RESULTS: The proposed method has been applied in a local hospital. Our research findings provide a valuable reference for the development of ZigBee-based MCS. CONCLUSIONS: The proposed node management mechanism is faster, more reliable, and more intuitive to use, than traditional methods.


Assuntos
Algoritmos , Redes de Comunicação de Computadores/organização & administração , Monitorização Fisiológica/métodos , Processamento de Sinais Assistido por Computador/instrumentação , Tecnologia sem Fio/organização & administração , Redes de Comunicação de Computadores/instrumentação , Desenho de Equipamento , Humanos , Monitorização Fisiológica/instrumentação , Fatores de Tempo , Tecnologia sem Fio/instrumentação
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