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Dissertations / Theses on the topic 'Hybrid WSN'

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1

Alshahrany, Falah. "Hybrid intelligent decision support system for distributed detection based on ad hoc integrated WSN & RFID." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/13380.

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The real time monitoring of environment context aware activities, based on distributed detection, is becoming a standard in public safety and service delivery in a wide range of domains (child and elderly care and supervision, logistics, circulation, and other). The safety of people, goods and premises depends on the prompt immediate reaction to potential hazards identified in real time, at an early stage to engage appropriate control actions. Effective emergency response can be supported only by available and acquired expertise or elaborate collaborative knowledge in the domain of distributed
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2

Ebada, Mohamed. "Multipath Routing for Wireless Sensor Networks: A Hybrid Between Source Routing and Diffusion Techniques." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19887.

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In this thesis, an investigation of the performance of multipath routing in Wireless Sensor Networks (WSN) is performed. The communication in the network under study is to take place from individual nodes to the sink node. The investigation involved multipath finding methods in WSN. Also, it involves investigating the weight assignment, traffic splitting and route selection methods for the different paths discovered by each node in the WSN. Also, a comparison between Hybrid Routing Protocol, Source Routing Protocol and Diffusion Routing Protocol is performed. A simple traffic routing algori
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3

Megahed, Mohamed Helmy Mostafa. "SurvSec Security Architecture for Reliable Surveillance WSN Recovery from Base Station Failure." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31154.

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Surveillance wireless sensor networks (WSNs) are highly vulnerable to the failure of the base station (BS) because attackers can easily render the network useless for relatively long periods of time by only destroying the BS. The time and effort needed to destroy the BS is much less than that needed to destroy the numerous sensing nodes. Previous works have tackled BS failure by deploying a mobile BS or by using multiple BSs, which requires extra cost. Moreover, despite using the best electronic countermeasures, intrusion tolerance systems and anti-traffic analysis strategies to protect the BS
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4

Alam, Muhammad Mahtab. "Power-Aware adaptive techniques for wireless sensor networks." Thesis, Rennes 1, 2013. http://www.theses.fr/2013REN1S049/document.

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Les Réseaux de capteurs sans fil (WSN) sont une technologie émergente avec des applications potentielles dans divers domaines de la vie quotidienne, tels que la surveillance structurelle et environnementale, la médecine, la surveillance militaire, les explorations robotisées, etc. Les nœuds de capteurs doivent fonctionner pendant une longue période avec des batteries capacité limitée, par conséquent le facteur plus important dans les WSN est la consommation d'énergie. Dans cette thèse, nous proposons des techniques d'optimisation algorithmiques dynamiques, et adaptative pour la réduction de l'
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Drira, Wassim. "Secure collection and data management system for WSNs." Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00814664.

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Nowadays, each user or organization is already connected to a large number of sensor nodes which generate a substantial amount of data, making their management not an obvious issue. In addition, these data can be confidential. For these reasons, developing a secure system managing the data from heterogeneous sensor nodes is a real need. In the first part, we developed a composite-based middleware for wireless sensor networks to communicate with the physical sensors for storing, processing, indexing, analyzing and generating alerts on those sensors data. Each composite is connected to a physica
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6

Drira, Wassim. "Secure collection and data management system for WSNs." Electronic Thesis or Diss., Evry, Institut national des télécommunications, 2012. http://www.theses.fr/2012TELE0051.

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Le développement des réseaux de capteurs sans fil fait que chaque utilisateur ou organisation est déjà connecté à un nombre important de nœuds. Ces nœuds génèrent une quantité importante de données, rendant la gestion de ces données non évident. De plus, ces données peuvent contenir des informations concernant la vie privée. Les travaux de la thèse attaquent ces problématiques. Premièrement, nous avons conçu un middleware qui communique avec les capteurs physiques pour collecter, stocker, traduire, indexer, analyser et générer des alertes sur les données des capteurs. Ce middleware est basé su
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7

Antoš, Zdeněk. "Příprava a charakterizace nástřiků hydroxyapatitu deponovaných technologii hybridního vodou-stabilizovaného plazmového hořáku z vodných roztoků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377876.

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Hydroxyapatite coatings have been used as a barrier between a metal core of replacement and living tissue for long time in medicine. Plasma spray is a typical technology for preparation these coatings. This thesis concerns a new plasma spray technology with hybrid system of arc stabilization (WSP-H). Simultaneously it uses an innovative method of feeding the initial material in a form of water suspension (SPPS). The aim of this thesis was to produce water solutions of hydroxyapatite and make coatings with WSP-H. These coatings were characterized in terms of their morfology, chemical and phase
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8

Hudson, David Christopher. "Two dimensional atomically thin materials and hybrid superconducting devices." Thesis, University of Exeter, 2014. http://hdl.handle.net/10871/16034.

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In this thesis a variety of topics concerning 2D materials that have been separated from bulk layered crystals are discussed. Throughout the thesis, single and few layers of graphene, fluorinated graphene, MoS2 and WS2 are used. Two new methods of freely suspending 2D materials are presented as well as a method of removing the background from optical images. This aids contrast measurements for the determination of the number of layers. Fluorinated graphene is found to be sensitive to beta radiation; the resistance of fluorinated graphene transistors is shown to decrease upon exposure to the ra
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9

Ng, Aik Hao. "Hybrid gamma camera imaging : translation from bench to bedside." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/49335/.

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There is increasing interest in the use of small field of view (SFOV) portable gamma cameras in medical imaging. A novel hybrid optical-gamma camera (HGC) has been developed through a collaboration between the Universities of Leicester and Nottingham. This system offers high resolution gamma and optical imaging and shows potential for use at the patient bedside, or in the operating theatre. The aim of this thesis was to translate the HGC technology from in vitro laboratory studies to clinical use in human subjects. Pilot studies were undertaken with the HGC as part of this thesis. Furthermore,
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Maxson, Ashley R. "NOVEL SYNTHESIS AND CHARACTERIZATION OF INORGANIC FULLERENE TYPE WS2 AND GRAPHENE HYBRIDS." Monterey, California. Naval Postgraduate School, 2013. http://hdl.handle.net/10945/32866.

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Approved for public release; distribution is unlimited<br>With the aim to develop personal protection systems with improved mechanical properties and reduced weight, this research combined graphene with tungsten disulfide, and studied this hybrid system included in epoxy resin. A novel plasma production process generated nanometric size tungsten oxide (WO3) spherical particles. The nanospheres were sulfurized to produce inorganic-fullerene type tungsten disulfide (IF-WS2). The plasma IF-WS2 particles exhibited smaller particle size, characteristic hollow cores and larger angle facets than IF-W
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11

Asres, G. A. (Georgies Alene). "Synthesis, characterization and application of WS₂ nanowire-nanoflake hybrid nanostructures." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526218892.

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Abstract Transition metal dichalcogenide (TMD) materials crystalize in a layered structure with a stoichiometry MX₂ where M is a transition metal (Mo, W, Tc, Re, V, Nb, Ta, Ti, Zr, Hf) and X is a chalcogen (S, Se, Te). While there is a strong covalent bond between the chalcogen and the metal atoms in each 2-dimensional (2D) sheet, the bulk 3-dimensional crystals are held together by weak van der Waals forces acting on the adjacent 2D sheets allowing for micromechanical and liquid phase exfoliation into nanostructures composed of either a single layer or a few layers. Since the electronic band
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12

Alam, Minhaj Md. "A study of the fatigue behaviour of laser and hybrid laser welds /." Luleå : Department of Applied Physics and Mechanical Engineering, Division of Manufacturing Systems Engineering, 2009. http://pure.ltu.se/ws/fbspretrieve/3386818.

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13

Antes, Jiří. "Svařování galvanicky pozinkovaných plechů pomocí hybridní technologie Laser-TIG." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443206.

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ANTES, Jiří: Welding of galvanized sheets using hybrid Laser-TIG technology This master thesis deals with the welding of zinced deep drawing steel using Laser-TIG technology. The first section of the thesis describes the topic from the theoretical point of view, which includes analysis of welding technologies, influence of used material and application of diagnostic methods. The second part of the thesis is focused on monitoring of welding current impact for weld quality of two types of joints.
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14

Bukvic, Tomáš. "Svařování žárově pozinkovaných plechů pomocí hybridní technologie Laser-TIG." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443207.

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Thesis is focused on verification of suitability of Laser-TIG technology for penetrating welding of galvanized sheets, made of WSS M1A 365-A14 50G steel and DC01 steel. Electric arc functions here as a preheating for evaporation of zink layer. Electric current was chosen as a variable parameter of magnitudes 0, 20, 30 and 40 A. Test welds were made, which have been subjected to a tensile test and metallographic evaluation. The positive influence for electrolytically galvanized steel WSS M1A 365-A14 50G was registered and determination of optimal welding parameters was successful. The electric
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15

Brehovský, Patrik. "Svařování hlubokotažných ocelí s ochrannou vrstvou hybridní technologií Laser-TIG." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417119.

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The diploma thesis focuses on laser welding of extra deep-drawn steel sheet according to the standard WSS-M1A365-A14 with a protective zinc surface layer. A 0,9 mm thick steel sheet with a zinc layer with coating weight 50 g · m^-2 is welded by a hybrid welding method Laser-TIG. The laser, as the primary energy source, is used for welding the material. The arc, provided by a non-melting tungsten electrode, is used for preheating the material for melting and evaporation of the zinc layer. Based on the initial experiments, the magnitude of the laser power with the welding speed was chosen as a c
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16

Tan, Heng Chuan. "Vers des communications de confiance et sécurisées dans un environnement véhiculaire." Thesis, Paris, ENST, 2017. http://www.theses.fr/2017ENST0063/document.

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Le routage et la gestion des clés sont les plus grands défis dans les réseaux de véhicules. Un comportement de routage inapproprié peut affecter l’efficacité des communications et affecter la livraison des applications liées à la sécurité. D’autre part, la gestion des clés, en particulier en raison de l’utilisation de la gestion des certificats PKI, peut entraîner une latence élevée, ce qui peut ne pas convenir à de nombreuses applications critiques. Pour cette raison, nous proposons deux modèles de confiance pour aider le protocole de routage à sélectionner un chemin de bout en bout sécurisé
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17

Tan, Heng Chuan. "Vers des communications de confiance et sécurisées dans un environnement véhiculaire." Electronic Thesis or Diss., Paris, ENST, 2017. http://www.theses.fr/2017ENST0063.

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Le routage et la gestion des clés sont les plus grands défis dans les réseaux de véhicules. Un comportement de routage inapproprié peut affecter l’efficacité des communications et affecter la livraison des applications liées à la sécurité. D’autre part, la gestion des clés, en particulier en raison de l’utilisation de la gestion des certificats PKI, peut entraîner une latence élevée, ce qui peut ne pas convenir à de nombreuses applications critiques. Pour cette raison, nous proposons deux modèles de confiance pour aider le protocole de routage à sélectionner un chemin de bout en bout sécurisé
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18

Li, Hung-Lin, and 李泓霖. "Design and Hardware Implementation of Hybrid RFID and WSN Mutual Authentication System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/30489901199764949929.

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碩士<br>義守大學<br>電子工程學系碩士班<br>98<br>In the past few years, radio frequency identification (RFID; Radio Frequency Identification) and wireless sensor networks Road (WSN; Wireless Sensor Network) has been parallel studied. RFID radio frequency identification system consists of tags and readers (antennas), and composed of middleware, while the wireless sensor network system consists of processing capability, memory, a radio frequency (RF) transceiver and a sensor unit. As the RFID technology mainly used in object tracking and data management. In contrast, WSN is much more mature in source informatio
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19

Santos, João Carlos Bernardo Oliveira Alves. "3-D Hybrid Localization with RSS/AoA in Wireless Sensor Networks: Centralized Approach." Master's thesis, 2016. http://hdl.handle.net/10362/31871.

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This dissertation addresses one of the most important issues present in Wireless Sensor Networks (WSNs), which is the sensor’s localization problem in non-cooperative and cooperative 3-D WSNs, for both cases of known and unknown source transmit power PT . The localization of sensor nodes in a network is essential data. There exists a large number of applications for WSNs and the fact that sensors are robust, low cost and do not require maintenance, makes these types of networks an optimal asset to study or manage harsh and remote environments. The main objective of these networks is to co
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20

Vicente, David José Marques. "Distributed Algorithms for Target Localization in Wireless Sensor Networks Using Hybrid Measurements." Master's thesis, 2017. http://hdl.handle.net/10362/27875.

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This dissertation addresses the target localization problem in wireless sensor networks (WSNs). WSNs is now a widely applicable technology which can have numerous practical applications and offer the possibility to improve people’s lives. A required feature to many functions of a WSN, is the ability to indicate where the data reported by each sensor was measured. For this reason, locating each sensor node in a WSN is an essential issue that should be considered. In this dissertation, a performance analysis of two recently proposed distributed localization algorithms for cooperative 3-D wirel
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21

Shiu, Jiun-Liang, and 許鈞喨. "Routing Decisions for Hybrid Information Transmission in WSNS." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/69ehyp.

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碩士<br>真理大學<br>資訊工程學系碩士班<br>106<br>The Routing applications is popular In Wireless Sensor Networks (WSNs). Most of previous applications do not recognize the different data. For a practical monitor-ing environment, the monitoring events may be varied, and so do the data sinks. We propose a distributed mechanism to arrange the routing for transmitting the event data to proper sink as soon as possible. The routing decides according to the transmission records as well as the remaining energy of itself and its neighbor. Fur-thermore, the mobile sensors in the environments may move to support moni
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Shyu, Yung Shiuan, and 徐永宣. "An Effective Framework for Fault-Tolerant VLSI/WSI Arrays Based on Hybrid Redundancy Approach." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/82507721061374427277.

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23

Marques, Rui João Paiva Pires. "The future of airline business models: which will win?" Master's thesis, 2015. http://hdl.handle.net/10362/15767.

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This research is titled “The Future of Airline Business Models: Which Will Win?” and it is part of the requirements for the award of a Masters in Management from NOVA BSE and another from Luiss Guido Carlo University. The purpose is to elaborate a complete market analysis of the European Air Transportation Industry in order to predict which Airlines, strategies and business models may be successful in the next years. First, an extensive literature review of the business model concept has been done. Then, a detailed overview of the main European Airlines and the strategies that they have been i
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24

Fo, Wen Ya [Verfasser]. "Strategieplanungen für das hybride Recycling in der Automobilindustrie / vorgelegt von Wen Ya Fo." 1999. http://d-nb.info/963566784/34.

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Rodrigues, Simone Pereira. "Development of Hybrid Surface Treatments for Controlling Wettability and Improving Tribological Performance." Doctoral thesis, 2019. http://hdl.handle.net/10316/88809.

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Tese no âmbito do Programa Doutoral em Materiais e Processamento Avançados (AdvaMTech), apresentado ao Departamento de Engenharia Mecânica da Faculdade de Ciências e Tecnologias da Universidade de Coimbra<br>O uso de resíduos poluentes ou nocivos, assim como o consumo exagerado de plásticos, são nos dias de hoje grandes problemas que em muito comprometem a sustentabilidade ambiental. A este respeito, materiais com funcionalidades especiais que possam durar mais tempo são as grandes exigências das entidades industriais. Nomeadamente, o controlo da molhabilidade da superfície dos materiais, bem
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26

Chen, Shih-Ting, and 陳仕亭. "A Contradictory or Win-win Regeneration Strategy? The Hybrid between Creative City Agenda and Community Activation Policy. A Case Study of Chung Shan Creative Hub (URS21)." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/uq337p.

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碩士<br>國立臺北大學<br>都市計劃研究所<br>102<br>Since 2010, “Urban Regeneration Station” (URS) is a new policy agenda of Urban Regeneration Office of Taipei City to pursue the creative city idea which has been propagated globally. It seeks to foster creative talent, simultaneously, to exercise the community activation policy of Taiwan that is for boosting urban creativity and vitality. However, certain scholars, such as R. Florida (2002), have doubted that the hybrid between creative city agenda and traditional community activation or cohesion policy could be a win-win solution for developing a creative cit
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Rao, Shilpa Dinkar. "Energy Harvesting Wireless Sensor Networks : Performance Evaluation And Trade-offs." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/2671.

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Wireless sensor networks(WSNs) have a diverse set of applications such as military surveillance, health and environmental monitoring, and home automation. Sensor nodes are equipped with pre-charged batteries, which drain out when the nodes sense, process, and communicate data. Eventually, the nodes of the WSN die and the network dies. Energy harvesting(EH) is a green alternative to solve the limited lifetime problem in WSNs. EH nodes recharge their batteries by harvesting ambient energy such as solar, wind, and radio energy. However, due to the randomness in the EH process and the limited amo
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Rao, Shilpa Dinkar. "Energy Harvesting Wireless Sensor Networks : Performance Evaluation And Trade-offs." Thesis, 2016. http://hdl.handle.net/2005/2671.

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Wireless sensor networks(WSNs) have a diverse set of applications such as military surveillance, health and environmental monitoring, and home automation. Sensor nodes are equipped with pre-charged batteries, which drain out when the nodes sense, process, and communicate data. Eventually, the nodes of the WSN die and the network dies. Energy harvesting(EH) is a green alternative to solve the limited lifetime problem in WSNs. EH nodes recharge their batteries by harvesting ambient energy such as solar, wind, and radio energy. However, due to the randomness in the EH process and the limited amo
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Klinge, Katrin. "Pflanze-Herbivore-Parasitoid Interaktionen auf Wildrosenarten und ihren Hybriden entlang eines geographischen Gradienten." Doctoral thesis, 2006. http://hdl.handle.net/11858/00-1735-0000-000D-F272-C.

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