Дисертації з теми "Senior Cycle"
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Reneau, James M. "An examination of the acceptance, adoption, and diffusion of smartphone devices with senior citizens." NSUWorks, 2013. http://nsuworks.nova.edu/gscis_etd/287.
Повний текст джерелаYilmaz, Mine. "Duty Cycle Control In Wireless Sensor Networks." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608856/index.pdf.
Повний текст джерелаNěmec, Ondřej. "Systém pro ověření vlastností senzorů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217763.
Повний текст джерелаSikka, Himanshu. "A soft sensor system for cycle-to-cycle control of parison length in intermittent l extrusion blow molding /." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82633.
Повний текст джерелаIn this work, a 'soft sensor' for cycle-to-cycle control of parison length is developed. A model for parison swell is proposed where the parameters of the model can be tuned from cycle to cycle to match the experimental parison dimensions. The technique was tested on a real intermittent extrusion blow molding machine where a target parison length was achieved by either adjusting the flow rate of the polymer or the die gap opening.
In this work, we have also proposed a technique for estimation of the average relaxation time using a combination of Carreau and Maxwell models. This technique is based on the observed time for parison swell outside the die, and it finds a relaxation time that closely represents the polydisperse nature of blow molding grade resins. The technique could be extended to estimate multiple relaxation times using a generalized Maxwell model. (Abstract shortened by UMI.)
Frances, Galiana Alfredo. "PERFORMANCE ANALYSIS OF DUTY-CYCLE MAC PROTOCOLS IN WIRELESS SENSOR NETWORKS." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-22146.
Повний текст джерелаObenofunde, Simon. "Topology Management in wireless sensor networks." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCK025.
Повний текст джерелаWireless sensor networking is ingratiating itself into almost every area of human endeavors. Its drivers include its usages, improvements in microelectronics and manufacturing techniques. The network is made up of multiple tiny sensor nodes deployed in the area to be sensed, with nodes having processing, communicating, and sensing capabilities that enable them to perform their function collaboratively. Nodes sense events and transmit their data to the sink directly or through intermediate nodes acting as relay.Despite all the tremendous advances that have been made on this technology over the past few years, energy has not kept pace. This is based mostly on the fact that battery is its main source of energy. Furthermore, some applications of the network may preclude batteries from either being recharged or changed after deployment.A renowned solution to energy efficiency is duty cycling. This is the periodic or aperiodic placing of a node in an active and an inactive state. This introduces network performance issues of availability, latency, and packet delivery ratio, all linked to the fact that once a node is inactive or off, it is unavailable to communicate. It is therefore important to look for means of still applying duty cycling yet not losing out in availability, latency, and packet delivery ratio.In this dissertation we employ duty cycle on topology management to extend the network lifetime. We propose five algorithms to build various topologies that we divide into two classes. The first class enables nodes to arrange themselves into repetitive and interleaving sets. That is, nodes in the same set repeat themselves on the ground such that a set spans the entire area to be sensed. The second class of algorithms arranges nodes in continuous successive sets with members of a set covering a transmission range. We demonstrate the set formation experimentally.Building on the continuous set formation we propose two algorithms that build disjoint virtual backbone networks, with the disjointedness used for activity scheduling. We then measure the performances of the algorithms notably the approximation ratio and find it quite low (in the order of 3.5) compared to what is obtained in the literature.Finally, we propose a sleep and relay protocol that works on these topologies. Nodes sleep in sets and the activeness is relayed between sets. We evaluate the performance of this protocol and confirm that it actually leads to increase energy savings while not deteriorating other network performance metrics, like latency and packet delivery ratio
Lai, Shouwen. "Duty-Cycled Wireless Sensor Networks: Wakeup Scheduling, Routing, and Broadcasting." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/27333.
Повний текст джерелаPh. D.
Kollipara, Sharmila. "Evaluation and Comparison of MAC Protocols in Wireless Sensor Networks." Cleveland State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=csu1292953246.
Повний текст джерелаDaemitabalvandani, Maziyar. "Routing algorithms for wireless sensor : networks based on the duty cycle of its components." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/395200.
Повний текст джерелаEn este trabajo nos focalizaremos en la minimización del consumo a partir de la minimización del número de transmisiones. Buscamos por tanto aquel algoritmo que nos permita aumentar la probabilidad de aciertos. Esta idea, diseñará el algoritmo de enrutamiento que mejor se ajusta a la red MANET. Una vez simulada la red se diseñará un "testbed" en donde una parte de la red se implementará de forma real, mediante la introducción de sensores inalámbricos y la otra parte se hará de forma simulada, a través de una interfaz que interconecta el mundo real con la simulación de Spyder. Se pretende ver que ambos mundos progresan de forma similar. Con respecto a la capa de OSI en WSN, sería prioritaria la capa física o capa de hardware, por este motivo nuestra proyecto también se centra en el tipo determinado de hardware que debe aplicarse para obtener resultados satisfactorios. Entonces tratamos las características de los dos hardwares, el transceiver y el microcontroller. También se trata en este apartado su concepto lógico de acuerdo con la ficha técnica oficial IEEE802.15.4. La segunda prioridad de la capa OSI se centra en el Medium Access Control (MAC) de la capa. En esta capa nuestro objetivo se logrará mediante la manipulación de las addresses MAC. Los protocolos MAC deben estar orientados a la reducción del consumo de energía y también a la reducción del tiempo no utilizado en WSN, para ello aplicamos algunas políticas para controlar los comportamientos del tráfico en esta capa para cambiar el consumo de energía, la vida útil de la red y evitar el gasto innecesario de recursos, en realidad concentramos a nuestro algoritmo VRT y FRT. Respecto de la idea principal, de controlar los sensores para aumentar la vida útil de la red y disminuir el consumo de energía. En realidad se explica cómo controlar la capa MAC y forzar el hardware para lograr el objetivo principal de este proyecto. De hecho podemos decir que mejoramos el reenvío de paquetes entre los sensores intermedios, buscando el promedio de distancia HOP más corta desde el origen al destino, así como la disminución del consumo de energía en cada sensor.
Klein, Jackson Alexander. "Energy Harvesting Opportunities Throughout the Nuclear Power Cycle for Self-Powered Wireless Sensor Nodes." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78031.
Повний текст джерелаMaster of Science
Mahmoudi, Ramin. "Structuration du cycle de carrière objectif et du cycle de carrière subjectif : perspectives pour les seniors : étude à partir du cas worldwide express." Thesis, Paris 10, 2012. http://www.theses.fr/2012PA100135/document.
Повний текст джерелаIn a changing and unpredictable international environment, uncontrolled events may occur in an individual’s career which results in the beginning of a “second career”. However, this restarting career is more complicated for a category of persons: the old workers. In 2009, the employment rate was 38.9% for individuals aged 55 to 64 which shows the difficulty for those people to prolong their working life. The literature proposes two approaches for this subject: objective and subjective, and introduces the “career lifecycle” concept. Our research is to explain the objective and subjective career cycle structures by identifying events uncontrolled by individuals, called “critical career incident”. The study based on the Worldwide Express case, showed the existence of mono-cycle and multi-cycle objective and subjective career lifecycle. It also highlighted critical incidents of individual and organizational careers which could be “positive” or “negative” for the individual’s career. This research has identified common characteristics that are appropriate to the objective and subjective career cycle structures. Finally, the empirical study showed that it was impossible for the old workers aged 50 or more to restart a new objective or subjective career cycle. Indeed, from this age the critical incidents in their career always influence negatively the professional life on these persons. This study proposes to the old workers and the organizations to understand the critical incidents of their career in order to start with a new “step” for the latter. For this reason it is suggested to “forget” the notion of age but rather to the age of the carreer, i.e. experiences as a decisive criterion in career management
Ainchwar, Arpit. "Determination of Cycle Time Constraints in Case of Link Failure in Closed Loop Control in Internet of Things." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36906.
Повний текст джерелаBäcklund, Tomas. "Development and validation of a system for clinical assessment of gait cycle parameter in patients with idiopathic normal pressure hydocephalus." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-82891.
Повний текст джерелаGao, Chao. "HOMOCYSTEINE-METHIONINE CYCLE IS A KEY METABOLIC SENSOR SYSTEM CONTROLLING METHYLATION-REGULATED PATHOLOGICAL SIGNALING - CD40 IS A PROTOTYPIC HOMOCYSTEINE-METHIONINE CYCLE REGULATED MASTER GENE." Master's thesis, Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/603000.
Повний текст джерелаM.S.
Homocysteine-Methionine (HM) cycle produces a universal methyl group donor S-adenosylmethionine (SAM), a competitive methylation inhibitor S-adenosylhomocysteine (SAH), and an intermediate amino acid product homocysteine (Hcy). Elevated plasma levels of Hcy is termed as hyperhomocycteinemia (HHcy) which is an established risk factor for cardiovascular disease (CVD) and neural degenerative disease. We were the first to describe methylation inhibition as a mediating biochemical mechanism for endothelial injury and inflammatory monocyte differentiation in HHcy-related CVD and diabetes. We proposed metabolism-associated danger signal (MADS) recognition as a novel mechanism for metabolic risk factor-induced inflammatory responses, independent from pattern recognition receptor (PRR)-mediated pathogen-associated molecular pattern (PAMP)/danger-associated molecular pattern (DAMP) recognition. In this study, we examined the relationship of HM cycle gene expression with methylation regulation in human disease. We selected 115 genes in the extended HM cycle, including 31 metabolic enzymes and 84 methyltransferases (MT), examined their mRNA levels in 35 human disease conditions using a set of public databases. We discovered that: 1) HM cycle senses metabolic risk factor and controls SAM/SAH-dependent methylation. 2) Most of metabolic enzymes in HM cycle (8/11) are located in cytosol, while most of the SAM-dependent MTs (61/84) are located in the nucleus, and Hcy metabolism is absent in the nucleus. 3) 11 up-regulated, 3 down-regulated and 24 differentially regulated SAM/SAH-responsive signal pathways are involved in 7 human disease categories. 4) 8 SAM/SAH-responsive H3/H4 hypomethylation sites are identified in 8 disease conditions. We conclude that HM cycle is a key metabolic sensor system which mediates receptor-independent MADS recognition and modulates SAM/SAH-dependent methylation in human disease. We propose that HM metabolism takes place in cytosol and that nuclear methylation equilibration requires nuclear-cytosol transfer of SAM, SAH and Hcy. CD40 is a cell surface molecule which is expressed on antigen presenting cells such as monocyte, macrophage, dendritic cells and neutrophils. The costimulatory pair, CD40 and CD40L, enhances T cell activation and induce chronic inflammatory disease. Also, DNA hypomethylation on CD40 promotor induces inflammatory monocyte differentiation in chronic kidney disease. In order to figure out if CD40 is a prototypic HM cycle regulated master gene, RNA-seq analysis were performed for CD40+ and CD40- monocytes from mouse peripheral blood and 1,093 differentially expressed genes (DEGs) were selected from those two groups. All the DEGs modulate as much as 15 functional gene groups such as cytokines, enzymes and transcriptional factors. Furthermore, CD40+ monocytes activated trained immunity pathways especially in Acetyl-CoA generation and mevalonate pathway. In HM cycle, CD40 is a prototypic HM cycle regulated master gene to induce the most of the Hcy metabolic enzymes as well as MT, which can further modulate the methylation-regulated pathological signaling.
Temple University--Theses
Bank, Erin Michelle. "Adenylyl cyclase activity in plasmodium falciparum : an essential carbon dioxide sensor and cell-cycle regulator /." Access full-text from WCMC, 2009. http://proquest.umi.com/pqdweb?did=1692367071&sid=2&Fmt=2&clientId=8424&RQT=309&VName=PQD.
Повний текст джерелаLiu, Sha. "ENERGY EFFICIENT MAC LAYER DESIGN FOR WIRELESS SENSOR NETWORKS." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1211909954.
Повний текст джерелаWang, Jun. "Switching-Cycle Control and Sensing Techniques for High-Density SiC-Based Modular Converters." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/83518.
Повний текст джерелаPh. D.
Bildea, Ana. "Link Quality in Wireless Sensor Networks." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENM054/document.
Повний текст джерелаThe goal of the thesis is to investigate the issues related to the temporal link quality variation in large scale WSN environments, to design energy efficient link quality estimators able to distinguish among links with different quality on a short and a long term. First, we investigate the characteristics of two physical layer metrics: RSSI (Received Signal Strength Indication) and LQI (Link Quality Indication) on SensLAB, an indoor large scale wireless sensor network testbed. We observe that RSSI and LQI have distinct values that can discriminate the quality of links. Second, to obtain an estimator of PRR, we have fitted a Fermi-Dirac function to the scatter diagram of the average and standard variation of LQI and RSSI. The function enables us to find PRR for a given level of LQI. We evaluate the estimator by computing PRR over a varying size window of transmissions and comparing with the estimator. Furthermore, we show using the Gilbert-Elliot two-state Markov model that the correlation of packet losses and successful receptions depend on the link category. The model allows to accurately distinguish among strongly varying intermediate links based on transition probabilities derived from the average and the standard variation of LQI. Finally, we propose a link quality routing model driven from the F-D fitting functions and the Markov model able to discriminate accurately link categories as well as high variable links
Sitanayah, Lanny. "Finding boundary cycles in location-free low density wireless sensor networks for mobile target tracking." University of Western Australia. School of Computer Science and Software Engineering, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0158.
Повний текст джерелаLin, Jian. "Design and analysis of MAC protocols for wireless multi-hop sensor and terahertz networks." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54866.
Повний текст джерелаKong, Xiangxiong, Jian Li, William Collins, Caroline Bennett, Simon Laflamme, and Hongki Jo. "A robust signal processing method for quantitative high-cycle fatigue crack monitoring using soft elastomeric capacitor sensors." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/625834.
Повний текст джерелаChaudhuri, Leena. "Manganese superoxide dismutase (MnSOD) 3'-untranslated region: a novel molecular sensor for environmental stress." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/2682.
Повний текст джерелаMichopoulos, Vasilis. "Congestion and medium access control in 6LoWPAN WSN." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/11463.
Повний текст джерелаZhang, Yin. "Performance Characteristics of Lithium Coin Cells for Use in Wireless Sensing Systems." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3588.
Повний текст джерелаYang, Jue. "Design and Implementation of Large-Scale Wireless Sensor Networks for Environmental Monitoring Applications." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28493/.
Повний текст джерелаBecker, Willyan Ronaldo. "Análise do padrão sazonal de imagens de índice de vegetação do sensor modis para culturas agrícolas." Universidade Estadual do Oeste do Paraná, 2016. http://tede.unioeste.br/handle/tede/2975.
Повний текст джерелаMade available in DSpace on 2017-08-31T19:33:36Z (GMT). No. of bitstreams: 2 Willyan_Becker2017.pdf: 12083877 bytes, checksum: 7a9e90225376028c123e5c6e1c568603 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2016-02-10
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
Orbital remote sensing techniques have proved to be a valuable tool, since they enable the agricultural monitoring of the vigor and the type of vegetation coverage in a regional scale, bringing results with greater anticipation and precision, and lower operational cost when compared to traditional techniques. Automatic identification of cultivated areas is one of the most important steps in the crop forecasting process. The improvement in the estimate of area cultivated with each crop directly influences the result of the forecast of each crop year, since the agricultural production is a function of the cultivated area. The general objective of this research was to create an automatic methodology for the separation of agricultural crops from soybean and maize by means of data mining (Article 1) and a methodology for forecasting the harvest date from the date of maximum vegetative development (Article 2). The methods used corresponded to the application of the seasonal trends analysis and data mining for soybean and corn agricultural areas in the state of Paraná, with images of the EVI vegetation index of MODIS sensors, TERRA and AQUA satellites. The results obtained in Article 1 show that, through the decision tree, one of the techniques of data mining, it was verified that, among eleven variables that characterize the spectral-temporal pattern of the EVI of each culture, five were enough to perform the separation of soybean and maize crops, in the year 2014/2015, with an accuracy of 96.3% and a kappa index of 0.92, being the maximum value of EVI, the date of sowing (DS), the Date of maximum vegetative development (DMDV), Cycle, and Major Integral. In Article 2 the DS, DMDV and Harvest Date (DC) of the EVI temporal profile were estimated for each mapped soybean and maize pixel in the crop years 2011/2012 to 2013/2014. Then, for each crop and crop year, the variables Delta1 (DMDV minus DS) and Delta2 (DC minus DMDV) were created. The results of the differences (DCDifference) between DC estimated by EVI (DCEVI) and predicted by mean time (DCDelta2) show that, for soybeans, it is possible to use only the mean value of the interval between DMDV and DC in the three harvested years studied, with 55 days for soybeans. For corn, the mean interval between DMDV and DC was 60 days, but it is verified that there is a large difference between the results obtained with DCEVI and DCDelta2. For corn DCDelta2 there were large variations among the mesoregions. Differences in DC (DCDifference), when using the means by mesoregions, presented better results than for Paraná as a whole.
Técnicas de sensoriamento remoto orbital têm se mostrado uma ferramenta valiosa, pois possibilitam o monitoramento agrícola do vigor e do tipo de cobertura vegetal em escala regional, trazendo resultados com maior antecedência e precisão e menor custo operacional em relação às técnicas tradicionais. A identificação automática de áreas cultivadas constitui uma das etapas mais importantes no processo de previsão de safras. A melhoria na estimativa de área cultivada com cada cultura influencia diretamente o resultado da previsão de cada ano-safra, uma vez que a produção agrícola é função da área cultivada. O objetivo geral desta pesquisa foi criar uma metodologia automática para separação das culturas agrícolas de soja e milho, por meio da mineração de dados (Artigo 1) e uma metodologia de previsão da data de colheita das culturas a partir da data de máximo desenvolvimento vegetativo (Artigo 2). Os métodos utilizados corresponderam à aplicação da análise de padrões sazonais e mineração de dados para áreas agrícolas de soja e milho no estado do Paraná, com imagens do índice de vegetação EVI dos sensores MODIS, satélites TERRA e AQUA. Os resultados obtidos no Artigo 1 mostram que, por meio da árvore de decisão, uma das técnicas de mineração de dados, constatou-se que, dentre onze variáveis que caracterizam o padrão espectro-temporal do EVI de cada cultura, cinco foram suficientes para realizar a separação das culturas de soja e milho, ano-safra 2014/2015, com uma exatidão de 96,3% e um índice kappa de 0,92, sendo elas o valor máximo de EVI, a data de semeadura (DS), a data de máximo desenvolvimento vegetativo (DMDV), o ciclo e a integral maior. No Artigo 2 foram estimadas as DS, DMDV e Data de Colheita (DC) do perfil temporal EVI para cada pixel mapeado de soja e milho nos anos-safra 2011/2012 a 2013/2014. Posteriormente criaram-se, para cada cultura e ano-safra, as variáveis Delta1 (DMDV menos a DS) e o Delta2 (DC menos a DMDV). Os resultados das diferenças (DCDiferença) entre a DC estimada pelo EVI (DCEVI) e a prevista por média temporal (DCDelta2) apontam que, para a soja, há a possibilidade de utilizar-se apenas do valor médio do intervalo entre a DMDV e a DC nos três anos-safra estudados, sendo 55 dias para a soja. Para a cultura do milho, o intervalo médio entre a DMDV e a DC foi de 60 dias, porém verifica-se que existe grande diferença entre os resultados obtidos com a DCEVI e a DCDelta2. Para a DCDelta2 do milho houve grandes variações entre as mesorregiões. As diferenças nas DC (DCDiferença), quando utilizadas as médias por mesorregiões, apresentam melhores resultados que para o Paraná como um todo.
Fernandez, Breno Ortega. "Considerações sobre outros empregos do sensor de detonação para o controle eletrônico de motores ciclo Otto utilizando análise espectral." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18149/tde-07112006-112508/.
Повний текст джерелаThis dissertation analyses the suitability of using the knock sensor as a feedback element for the electronic control of internal combustion engines. The proposed approach consists of using the knock sensor, originally installed by the engine maker in order to eliminate the spontaneous combustion effect, to sample the mechanical vibration produced by the engine. This vibration, which results from the moving parts and the natural oscillation of the system in combustion, produces an output in the range of audible sound. This research contemplates using the spectral variation of that sound to estimate information about an engine operating with different fuel blends.
Rahman, Mustazibur. "Management of City Traffic, Using Wireless Sensor Networks with Dynamic Model." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30916.
Повний текст джерелаAmmar, Ibrahim Ammer Musbah. "Design and analysis of energy-efficient media access control protocols in wireless sensor networks : design and analysis of MAC layer protocols using low duty cycle technique to improve energy efficient and enhance communication performance in wireless sensor networks." Thesis, University of Bradford, 2014. http://hdl.handle.net/10454/7268.
Повний текст джерелаAmmar, Ibrahim A. M. "Design and analysis of energy-efficient media access control protocols in wireless sensor networks. Design and analysis of MAC layer protocols using low duty cycle technique to improve energy efficient and enhance communication performance in wireless sensor networks." Thesis, University of Bradford, 2014. http://hdl.handle.net/10454/7268.
Повний текст джерелаRitchie, John Paul. "Identifying the level of flexibility a single-family home may require in order to meet changing needs during the family life cycle with special reference to seniors." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22454.
Повний текст джерелаOzturk, Salih Baris. "Modelling, simulation and analysis of low-cost direct torque control of PMSM using hall-effect sensors." Thesis, Texas A&M University, 2005. http://hdl.handle.net/1969.1/4905.
Повний текст джерелаMichálek, Tomáš. "Vývoj MAC protokolu pro bezdrátové senzorové sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-242186.
Повний текст джерелаMcCarthy, Tom. "Automatiserad gatubelysning baserad på omgivningens ljusstyrka : Hur ljussensorteknik kan minska energianvändningen för utomhusbelysning." Thesis, KTH, Hälsoinformatik och logistik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302562.
Повний текст джерелаThe goal of this thesis was to investigate how individual streetlights could be equipped with light sensor technology to apply an automatic dimmer function with the purpose of reducing energy usage. Studies show that road and streetlights in Sweden accounted for 626 GWh during the year 2016 and that a large portion of the lights still consists of energy demanding high pressure sodium lamps. Reports also show that energy efficient LED is becoming more and more common as an alternative to high pressure lamps. The goal was to develop a prototype for LED lighting with the function to control the LED’s to be off when the surrounding light levels are high and to dynamically increase the output power when the surroundings light level go down. Each light sensor reads an analog value which is interpreted by a micro controller that sends a pulse width modulated signal to control the LED power output. The finished prototype worked satisfactory and according to the set goals of the thesis. Generally, the thesis showed that extensive research is needed before the prototype could be implemented in real life. The prototype also needs to be tested and calibrated in an outdoor environment with day light.
Wang, Qihe. "Scheduling and Simulation of Large Scale Wireless Personal Area Networks." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1148050113.
Повний текст джерелаAntilahy, Herimpitia Tsilavina Chrystelle. "Développement et mise en œuvre d’un mécanisme « 4D-addressing Wakeup radio » pour la réduction de la consommation d’énergie dans les réseaux de capteurs sans fil." Thesis, La Réunion, 2018. http://www.theses.fr/2018LARE0038.
Повний текст джерелаWireless sensor networks that are suitable for a wide range of applications, represent a promising solution that meets any requirement for continuous monitoring. The energy autonomy of sensor nodes constitutes a vulnerability factor that directly affects their longevity and the capacity of the network to ensure long coverage of the geographical area of interest. Energy consumption management is the only way to increase the lifespan of these networks and to give them a reasonable autonomy. Software solutions proposed through MAC protocols, bring significant improvements to the minimization of the energy expenditure of sensor nodes. They reduce the idle-listening periods which represents the most expensive operation in terms of energy, in the operation of the wireless sensor nodes. However, Focusing lonely on these solutions is not enough to guarantee acceptable longevity. The only way to optimize energy conservation in the WSN is to constantly put each node in low power mode and use a wakeup mechanism through wake-up signals. This involves the use of low-power wake-up circuits that provide channel monitoring, and trigger node wake-up only whenever event of interest occurs. In this context, a significant amount of work has proposed the use of an addressing mechanism (MAC addresses or other binary informations), to allow non-concerned nodes to quickly return to their sleep state. This approach is interesting, but involves a significant energy expenditure, related to address information’s reception and processing at all nodes. The most energy efficient solution would be the use of another type of address. This thesis is part of the context of minimizing the energy consumption of the WSN, using an addressing system that allows sensor nodes to receive and process the wake-up signals, without turning on their main communication module. It is to eliminate the energy expenditure related to the RF module’s activation and the reception of address packets, by exploiting wakeup signals duration. Our solution is based on the hardware characteristics of the microcontroller (IRQ, Timer/Counter) of sensor nodes. It reduces the complexities related to wakeup signals conditioning. Our solution is implemented on a small network. Its evaluations were done experimentally and its energy performance is compared to a conventional wake-up mechanism without addressing,and a conventional scheme based on duty-cycling
Luong, Marie. "Conception optimale de l'architecture d'un systeme d'instrumentation sous contraintes de diagnostic, de fiabilité et de disponibilité." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL155N.
Повний текст джерелаDye, Jeremy Brooks. "Comparison of Winter Temperature Profiles in Asphalt and Concrete Pavements." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2240.
Повний текст джерелаAby, Affoua Thérèse. "Réseaux de capteurs sans fil étendus dédiés aux collectes de données environnementales." Thesis, Clermont-Ferrand 2, 2016. http://www.theses.fr/2016CLF22671/document.
Повний текст джерелаWireless sensor networks are used in many environmental monitoring applications (e.g., to monitor forest fires or volcanoes). In such applications, sensor nodes have a limited quantity of energy, but must operate for years without having their batteries changed. The main mechanism used to allow nodes to save energy is to sequence periods of activity and inactivity. However, the design of MAC and routing protocols for applications with low duty-cycle is still a challenge. In this thesis, we proposed unsynchronized MAC and routing protocols for wireless sensor networks devoted to environmental monitoring applications. The main specificity of our protocols is that they are adapted to very low duty-cycle (less than 1 % for all nodes). Our protocols are analyzed and compared to existing protocols by simulation and experimentation on TelosB nodes. Despite this low duty-cycle for all nodes, our protocols are able to achieve good performance, unlike other protocols in the literature, which are not adapted to these extreme conditions
Roussel, Kévin. "Évaluation et amélioration des plates-formes logicielles pour réseaux de capteurs sans-fil, pour optimiser la qualité de service et l'énergie." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0051/document.
Повний текст джерелаIn the field of wireless sensors networks (WSN), specialized network stacks have been a very active research field for many years. However, most of this research, especially on lower layers of the network stacks, did not go beyond theory. Their implementations have generally not been the subject of deep or systematic effort, especially within the framework of dedicated operating systems. We thus propose, in this thesis, to focus on interaction analysis between lower layers’ protocols and dedicated software platforms, and to optimize them, especially at the implementation level. We first review and evaluate the various dedicated operating systems, and choose the one offering the necessary features to implement efficient and innovative MAC/RDC protocols. We then study, improve and optimize these lower layers of specialized stacks, and show, with an actual implementation of one of our advanced MAC/RDC protocols, that we can bring significant improvements in the quality of service (QoS) of WSNs, especially under heavy network traffic. We also report inaccuracies in Cooja/MSPSim simulations/emulations, and analyze the reliability issues caused by the use of this tool for performing evaluations (especially time-related) of WSNs. We finally propose some new leads for future enhancements and optimizations of the lower layers of these specialized network stacks, in order to further improve the liability, performances and energy consumption of WSNs
Міхненко, Ярослав Олександрович. "Модифікований метод передачі даних в мережі Інтернету Речей". Master's thesis, КПІ ім. Ігоря Сікорського, 2021. https://ela.kpi.ua/handle/123456789/42139.
Повний текст джерелаThe thesis contains 70 pages, 15 figures, and 10 tables. 35 sources have been used. The purpose of the work is to increase the energy efficiency of the IoT sensor network by modifying the method of information transmission, which will increase the operating time of the nodes of collection and transmission of information of the IoT sensor network. The detailed analysis of the problems of the Internet of Things has been made. Special attention has been paid to modernizing the architecture of the network for improving its energy efficiency and extending its lifetime. The method of random Sleep/Wake cycle has been analyzed in detail. The task to modify the architecture of the wireless sensorу network of the Internet of Things has been fulfilled. The co-ordinated Sleep/Wake cycle method is proposed for transmitting information packets within the sensory network of the Internet of Things. After evaluating the new method and its simulation model, it was concluded that this modified method might be useful for implementation, since: 1. The life cycle of the network with the proposed coordinated method for calculating the duty cycle and queue determination increased from 3.8% to 11.25%. 2. The lifetime of the sensory network increased from 8.4% to 14.8%, compared to the asynchronous cycle of queues in the sensory networks of the Internet of Things.
Neugebauer, Mario. "Energieeffiziente Anpassung des Arbeitszyklus in drahtlosen Sensornetzen." Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A23928.
Повний текст джерелаWireless Sensor Networks support flexible measuring of physical values. Due to the geographical distribution and multipath scattering the base station in such a network might not be reached by all sensors. Hence, other sensor nodes have to work as relay stations. At the same time, each sensor node is forced to consume as low energy as possible. In order to save energy the messages are generated event based in each sensor node and forwarded with a time triggered approach. Thereby, the duty cycle describes the portion of the relay activities in relation to the overall cycle. Currently available approaches do not properly adapt these two paradigms, event and time triggered, to each other. In this work a method to adapt the duty cycle according to the traffic is proposed. Therefore, the traffic is monitored and evaluated for traffic adaptation. Furthermore, the performance of the duty cycle adaptation is assessed using simulations. They show the behavior of the adaptation algorithm in static and dynamic scenarios with different parametrizations. The supplemental analytical models enable to easily estimate the behavior of the adaptation, in static as well as in dynamic scenarios. Also, it is shown how the duty cycle adaptation can be deployed for standard technologies like IEEE 802.15.4.
Varga, Liviu Octavian. "Réseaux de capteurs sans fils multi-sauts à récupération d’énergie : routage et couche liaison de bas rapport cyclique." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAM064/document.
Повний текст джерелаThe goal of the thesis is to enable IPv6 harvested and autonomous wireless sensor networks with very low duty-cycle. It is part of an industrial project, GreenNet, hosted by STMicroelectronics with the goal of being a pioneer in the Internet of Things. The new platform differentiates from its existing competitors by a small size, which implies small battery capacity. However, a photovoltaic cell is capable of recharging the battery even under low light conditions. On top of this, we aim at nodes that sleep for very long periods. Hence, the existing solutions were not completely suited for ourneeds.The thesis proposes to analyze the possible challenges that one can meet while developing a harvested low-duty cycle platform. The most important contribution of this work is that we implement and evaluate the performance of our solutions on real hardware platforms in conditions very close to real-life.In this dissertation, we first of all develop and implement a basic solution based on the IEEE 802.15.4 beacon-enabled standard. We choose the synchronized mode because it allows nodes to reach duty-cycles as low as 0.01%. A more difficult step was to bring multi-hop: we design new a routing scheme inside our network, and a time based access for routers and devices to eliminate interferences as much as possible. The routing scheme is meant to be simple and efficient.We go even further to optimize the total time the nodes are on: we proposed to shut down coordinators before their standardized end of slot when there is no communication. Devices that do not need to send data can skip beacons and only need to wake up to synchronize their clock or to send data. In the same time we solve the problem of multicast for long sleeping nodes by converting these packets into unicast traffic. We also improved the duty-cycle of routers that do no have associated devices by forcing them to beacon slower, as long as they do not have any associated devices.To improve the network performance we also propose a backward compatible multichannel solution. Such a scheme is useful when a link between two nodes achieve very bad performance on a certain channel but better results on a different frequency.All the solutions presented above and discussed in the dissertation were implemented and tested on the GreenNet platform. We also realized measurements of the nodes efficiency while in harvested conditions and showed that it is possible to handle harvested routers, when there is enough available light
El, Gholami Khalid. "La gestion de la qualité de service temps-réel dans les réseaux de capteurs sans fil." Thesis, Clermont-Ferrand 2, 2014. http://www.theses.fr/2014CLF22537/document.
Повний текст джерелаIn the last years, Wireless Sensor Networks ‘WSN’ knew a tremendous evolution which attracted many applications. WSN has several characteristics that make it a unique research field, such as, WSN nodes’ constraints and the unreliable (lossy) wireless communication. The IEEE 802.15.4 standard is the first standard designed for this type of networks known as LR-WPANs ‘Low-Rate Wireless Personal Area Network’. The energy conservation mechanism proposed by the current standard is quite efficient and very flexible. This flexibility comes from the ability to configure different duty cycles to meet specific applications’ requirements. However, this mechanism has a considerable impact on the end-to-end delay. Our approach resolves the energy/delay trade-off by avoiding the storage of the real-time data in the coordinator during sleep time, more particularly in Multi-source Multi-sink networks. A new superframe structure is adopted and a deterministic reception scheduling is used. In this thesis, we also proposed a new WPAN model for the Network Simulator 3 ‘NS-3’
Neugebauer, Mario. "Energieeffiziente Anpassung des Arbeitszyklus in drahtlosen Sensornetzen." Doctoral thesis, Dresden Vogt, 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=2924563&prov=M&dok_var=1&dok_ext=htm.
Повний текст джерелаHemming, Michael. "Implementation of novel sensors on underwater gliders." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS612.
Повний текст джерелаAround a quarter of global anthropogenic carbon emissions have been absorbed by the ocean. Underwater gliders have been identified as important tools for gathering information related to climate change and ocean acidification processes. The REP14 - MED experiment involved the deployment of eleven gliders in the northwestern Mediterranean Sea; one of these had an experimental ion sensitive field effect transistor (ISFET) sensor attached. A comparison between pH observed by the glider and ship during the deployment indicated problems with the sensor accuracy and stability. Sunlight caused an apparent sensor pH decrease of up to 0.1 close to the surface around local noon. The pH corrected for drift, temperature, and pressure is presented with other ocean variables measured by the glider. The timing of the phytoplankton spring bloom in the northwestern Mediterranean Sea varies year-on-year. A glider with an ISFET pH sensor was deployed close to the BOUSSOLE mooring site. This deployment offered a second opportunity to test the ISFET sensor with improvements. Similarly to during the REP14 - MED experiment, ISFET pH measurements were corrected for drift, temperature and pressure effects. Measurements at the BOUSSOLE mooring indicated that the spring bloom started around March 19. Mean net community production (N) rates were estimated from the glider dissolved oxygen concentrations, as well as glider and buoy dissolved inorganic carbon concentrations derived using other parameters. N ranged between -82 ± 317 mmol m−2 d−1 and 460 ± 870 mmol m−2 d−1. Horizontal spatial scales of variability highlight physical and biogeochemical processes, and are useful for designing ocean observing systems. Spatial scales of variability were estimated from semivariograms using glider measurements. Spatial scales of variability were mostly small at depths affected by biology, and large at depths affected by large-scale processes, such as weather, although this was not true in every case. Some direction dependency was found, which may be related to ocean currents, or the density of glider meridional measurements
Benzerbadj, Ali. "Approche inter-couches pour l'économie d'énergie et la fiabilité dans les Réseaux de Capteurs Sans Fil dédiés aux Applications Critiques de Surveillance." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0034/document.
Повний текст джерелаWireless Sensor Networks (WSNs) are a special class of Ad hoc networks, which are under intensive research.They are considered as a very powerful tool to connect the physical and the digital worlds. They consist of a largenumber of sensor nodes that are characterized with limited resources in terms of energy, range of sensing and communication, processing speed and storage capacity.They are deployed in an indoor or outdoor environment in many application domains such as army, environment, health, home and agriculture. The scarcity of sensor node resources and the unreliability of wireless links drive most of the research issues in the field of WSNs, namely energy, coverage, connectivity, routing, fault tolerance and security. The aim of this thesis is to propose an energyefficient and reliable cross-layer surveillance protocol for sensitive fenced areas, such as oil or nuclear sites, using duty-cycled WSNs with asymmetrical links due to the radio irregularity phenomenon. Initially, the proposed protocol identifies the boundary nodes of the deployedWSN, to be used as sentinel nodes, i.e., nodes that are always in an active state. The remaining nodes are usedas duty-cycled relay nodes during the routing phase to relay alerts towards the sink. The boundary nodes identification process and alert routing are both performed using an enhanced version of the Greedy Perimeter Stateless Routing (GPSR) protocol, referred to as GPSR over Symmetrical Links (GPSR-SL) and which relies on a Non Unit Disk Graph (N-UDG). The proposed cross-layer surveillance protocol has been implemented and its performance has been evaluated under the OMNeT++/Castalia simulation environment. Performance results show that this protocol achieves higher Packet Delivery Ratio by up to 3.63%, energy .efficiency and satisfactory latency when compared to the same protocol based on the original GPSR
Pieleszová, Katarzyna. "Centrum Ponava Brno, Královo Pole." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-227110.
Повний текст джерелаBock, Martin. "Programmable ultrashort highly localized wave packets." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16842.
Повний текст джерелаThis thesis deals with the concept of radially non-oscillating, temporally stable ultrashort-pulsed Bessel-like beams or "needle pulses", which are an example of a highly localized wave packet (HLW). HLWs are the closest approximation of linear-optical light bullets and provide specific benefits compared to conventional Gaussian-like light bullets. The spatio-temporally nonspreading propagation behavior of few-cycle needle beams of less than 10 fs duration will be theoretically discussed in detail. An overview of the generation and detection of localized waves carrying an orbital angular momentum is also given. High fidelity spatial light modulators are used for the generation of HLWs. The flexible tailoring of few-cycle wave packets at near-infrared wavelengths is reported. It is shown that such pulses propagate over a huge depth of focus, neither significantly changing their spot size or nor the pulse duration. Variable geometrical distributions like circular disks, rings, or bars of light are shaped and exploited as building blocks for structures of higher complexity. Another section of the thesis emphasizes the numerous potential applications of related techniques for an optimized two-dimensional spatial pulse shaping and diagnostics (reduce ambiguities) based on localized waves. As a particularly important example, time-wavefront sensing is used to combine nonlinear multichannel autocorrelation with Shack-Hartmann wavefront sensing by means of localized sub-beams and adaptive functionality. The capabilities of such devices are illustrated by the results of angular and temporal mapping of few-cycle wave packets. Moreover, spatial encoding and subsequent tracking of individual sub-beams, even at incident angles of up to 50°, enables to significantly improve the spot recognition. Finally, first steps towards the generation of optical light bullets carrying integer or non-integer orbital angular momenta are presented.
Portillo, Jiménez Canek. "Modelado y evaluación de prestaciones de redes de sensores inalámbricos heterogéneos con ciclo de trabajo síncrono." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/171275.
Повний текст джерела[CA] Les xarxes de sensors sense fils (WSN) han experimentat un ressorgiment causa de al desenvolupament de la Internet de les Coses (IoT). Una de les característiques de IoT és la inclusió, en les seves aplicacions, de dispositius sensors i actuadors. En aplicacions com automatització d'edificis, de gestió energètica, industrials o de salut, els nodes sensors que componen la WSN, transmeten informació a un col·lector central o sink. La informació és posteriorment processada, analitzada i utilitzada per a propòsits específics. En cadascuna d'aquestes aplicacions, els dispositius sensors poden considerar com a part d'una WSN. En aquest sentit el modelitzat i l'avaluació de l'acompliment en les WSN és important, ja que permet obtenir una visió més clara del seu comportament, facilitant un adequat disseny i una exitosa posada en operació. En el present treball de tesi s'han desenvolupat models matemàtics per avaluar l'acompliment de WSN, els quals estan basats en Cadenes de Markov en Temps Discret (DTMC). Els paràmetres d'acompliment obtinguts per a l'avaluació són: energia consumida mitjana, eficiència energètica, cabal cursat i retard mitjà dels paquets. Els resultats que s'han obtingut, han estat validats per mitjà de simulació basada en esdeveniments discrets (DES). Existeixen estudis de WSN en escenaris homogenis, on els nodes que componen la xarxa sense fils són de el mateix tipus i tenen les mateixes característiques d'operació. En aquests anàlisis prèvies es defineixen WSN homogènies compostes per un node central o embornal (sink), que rep la informació dels nodes sensors localitzats al voltant, formant una cèl·lula o cluster. Aquests nodes realitzen les transmissió en SPT (Single Packet Transmission), és a dir, enviant un sol paquet cada vegada que transmeten. No obstant això, és possible trobar, més ara amb el desenvolupament de la IOT, escenaris on hi ha una coexistència de distints tipus de nodes, amb característiques diferents i, per tant, amb requeriments d'operació específics. Això dona lloc a formació de clusters els nodes tenen aplicacions diferents, desigual consum d'energia, diverses taxes de transmissió de dades, i fins i tot diferent prioritats d'accés a canal de transmissió. Aquest tipus d'escenaris, que anomenem heterogenis, formen part dels escenaris estudiats en el present treball de tesi. En una primera part, s'ha desenvolupat un model per avaluar l'acompliment d'una WSN heterogènia i amb prioritats d'accés al medi. El modelitzat inclou un parell DTMC de dues dimensions (2D-DTMC), la solució en termes de la distribució estacionària de probabilitat, és utilitzada per obtenir posteriorment els paràmetres d'acompliment. Es desenvolupen, per tant, expressions tancades per a la determinació dels paràmetres d'acompliment, on és substituïda la distribució estacionària que s'ha obtingut a partir de la solució de les 2D-DTMC. En una segona part, es desenvolupa un model, en el qual els nodes pertanyents a la WSN, poden transmetre els seus paquets en agregat (APT) en escenaris heterogenis i amb prioritats. A diferència del model anterior, on els nodes transmeten un paquet per cicle (SPT), en APT els nodes poden transmetre més d'un paquet. Això porta com a conseqüència una major eficiència energètica, a més d'un augment en el cabal cursat i disminució en el retard mitjana. En una tercera part, es proposa un nou desenvolupament analític per a la determinació del consum energètic dels nodes que conformen una WSN. A diferència de les expressions utilitzades anteriorment per al càlcul del consum energètic, aquesta proposta alternativa permet obtenir resultats més precisos a través del desenvolupament d'expressions més intuïtives i sistemàtiques. Amb aquest nou procediment, es realitzen estudis energètics per WSN en escenaris homogenis i heterogenis.
[EN] Wireless sensor networks (WSN) have experienced a resurgence due to the development of the Internet of Things (IoT). One of the characteristics of IoT is the deployment of applications that require sensor devices and actuators. In applications such as building automation, energy management, industrial or health, the sensor nodes that make up the WSN transmit information to a central collector or sink. The information is processed, analyzed, and used for specific purposes. In each of these applications, the sensor devices can be considered part of a WSN. In this sense, the modeling and performance evaluation of WSN is important, since it allows obtaining a clearer vision of their behavior, facilitating an adequate design and a successful operation. In the present thesis, analytical models based on Discrete Time Markov Chains (DTMC) have been developed to evaluate the performance of WSN. The parameters defined for the performance evaluation are: average consumed energy, energy efficiency, throughput and average packet delay. The obtained results have been validated by means of discrete event simulation (DES). There are studies of WSN in homogeneous scenarios, where the nodes that compose the WSN are of the same type and have the same operating characteristics. In these previous studies, homogeneous WSN are defined as a cell or cluster composed of a central node or sink, which receives the information from the sensor nodes located around it. These nodes operate in SPT (Single Packet Transmission), sending a single packet per transmission cycle. However, it is possible to find, especially now with the development of the IoT, scenarios where different types of nodes coexist, although they have different characteristics or specific operational requirements. This results in the formation of clusters whose nodes have different applications, uneven power consumption, different data transmission rates, and even different priorities for access to the transmission channel. These types of scenarios, which we call heterogeneous, are part of the scenarios studied in this thesis work. In the first part, a model has been developed to evaluate the performance of a heterogeneous WSN and with priorities to access a common channel. The model includes a two-dimensional DTMC pair (2D-DTMC), whose solution in terms of the stationary probability distribution is used to obtain the performance parameters. Closed expressions are provided for the determination of performance parameters of interest, given in terms of the stationary distribution of the 2D-DTMC. In a second part, an analytical model is developed to evaluate the performance of a heterogeneous WSN, where nodes operate in aggregate packet transmission (APT) mode and deploy different channel access priorities. Un like the previous model, where the nodes transmit one packet per cycle (SPT) when they gain access to the channel, in APT the nodes can transmit a number of packets larger than one, that is the minimum between a configurable parameter and the number of packets in the packet queue of the node. This results in greater energy efficiency and throughput, while decreases the average packet delay. In a third part, a new analytical model is proposed to determine the energy consumption of the nodes that make up a WSN. Unlike previous computation procedures, this alternative proposal is based on more intuitive and systematic expressions and allows to obtain more accurate results. With this new procedure, energy studies are performed for WSN in homogeneous and heterogeneous scenarios.
Este trabajo se ha desarrollado en el marco de los siguientes proyectos de investigación: Platform of Services for Smart Cities with Dense Machine to Machine Networks, PLASMA, TIN2013-47272-C2-1-R and New Paradigms of Elastic Networks for a World Radically Based on Cloud and Fog Computing, Elastic Networks, TEC2015-71932-REDT. También quisiera agradecer el apoyo recibido por parte de the European Union under the program Erasmus Mundus Partnerships, project EuroinkaNet, GRANT AGREEMENT NUMBER - 2014-0870/001/001 y La Secretaria de Educación Pública (México), bajo el Programa para el Desarrollo Profesional Docente: SEP-SES (DSA/103.5/15/6629).
Portillo Jiménez, C. (2021). Modelado y evaluación de prestaciones de redes de sensores inalámbricos heterogéneos con ciclo de trabajo síncrono [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/171275
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