Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"DTN"”.
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Applying Multi-Packet Reception with DTN in Vehicular Ad-hoc Networks
… VANET usually fits in Delay Tolerant Network (DTN) in which nodes are partially connected and existing path may not available between partial nodes due to limited distance for wireless transmissions. To achieve successful packets delivery in DTN, routing protocols have been proposed by using …
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Dynamic trust negotiation for decentralised e-health collaborations
… a novel model called dynamic trust negotiation (DTN) that supports n-tier negotiation hops for trust realisation in multi-domain collaborative environments with specific focus on e-Health environments. DTN describes how trust pathways can be discovered and subsequently how remote security …
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Experimental Evaluation of Convergence Layers in Delay Tolerant Networks
… perform efficiently in Delay Tolerant Networks (DTN) environments that operate in environments with high delays, significant losses, and intermittent connectivity. DTN uses the Bundle Protocol (BP) in the Bundle layer for storing and forwarding data units to deal with the absence of an end to end …
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Η ΕΠΙΔΡΑΣΗ ΤΗΣ ΔΙΑΛΛΥΛΟΝΟΡΤΟΞΙΦΕΡΙΝΗΣ ΚΑΙ ΤΟΥ ΒΡΩΜΙΟΥΧΟΥ ΠΑΝΚΟΥΡΟΝΙΟΥ ΣΤΗΝ ΕΝΔΟΦΘΑΛΜΙΑ ΠΙΕΣΗ ΚΑΤΑ ΤΗΝ ΔΙΑΡΚΕΙΑ ΤΗΣ ΓΕΝΙΚΗΣ ΑΝΑΙΣΘΗΣΙΑΣ
… HYPERTENSIVE AND 40 NORMOTENSIVE. WEADMINISTERED DTN IN 20 NORMOTENSIVE AND 20 HYPERTENSIVE PATIENTS AND ALSO WE ADMINISTERED PB. PREMEDICATION AND INDUCTION OF ANAESTHESIA WAS IDENTICAL FOR BOTH SUBGROUPS. THE MEASUREMENTS OF THE INTRAOCULAR PRESSURE WERE PERFORMED ON BOTH EYES USING A SCHIOTZ …
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Towards efficacy and efficiency in sparse delay tolerant networks
… of communication via Delay Tolerant Networks (DTNs), whereby messages are routed by the personal devices carried by ever-moving people. Although a DTN is a type of Mobile Ad Hoc Network (MANET), traditional MANET solutions are ill-equipped to accommodate message delivery in DTNs due to the …
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Disruption-tolerant networking protocols and services for disaster response communication
… in the form of a disruption-tolerant network (DTN). DTN copes with intermittent connectivity among devices by using persistent storage and by transporting data packets exploiting mobility of nodes. Our dissertation efforts augment DTN literature with a new set of protocols and application …
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Densidad Mineral ósea en niños con Mielomeningocele
Los defectos del tubo neural (DTN) y entre ellos el mielomeningocele (MM) forman, con la luxación congénita de la cadera y el pie equino varo congénito, las anomalías más severas y frecuentes del sistema locomotor. El MM es un defecto del conducto neural
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Reliable Data Transmission in Challenging Vehicular Network using Delay Tolerant Network
… VANET environment. Also, Delay Tolerant Network (DTN) are implemented in the Opportunistic Network Environment (ONE) simulator, where the Store-Carry-Forward technique is used to route traffic. When network resources are not limited, a high delivery ratio is possible. However, when network …
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Prediction-enhanced Routing in Disruption-tolerant Satellite Networks
This thesis introduces a framework for enhancing DTN (Delay-/Disruption-Tolerant Networking) routing in dynamic LEO satellite constellations based on the prediction of contacts. The solution is developed with a clear focus on the requirements imposed by the 'Ring Road' use case, mandating a concept …
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Approximation errors in nonstationary inverse problems
… with the stochastic Dirichlet-to-Neumann (DtN) operator. The Karhunen–Loéve (KL) theorem has been adapted to compute a low-dimensional representation of the DtN operator. In this thesis, we extend domain truncation problems to the nonstationary setting. Furthermore, we consider the BAE …
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A Distributed Reinforcement Learning based Intelligent Routing and Beamforming Design for Robot-assisted Mobile Ad-hoc Network under Uncertain and Complex Environment
… Under the background of Delay tolerant network (DTN), how to improve the effectiveness of the real-time routing in a multi-autonomous robot-assist MANET under uncertain and complex environment, even in the more extreme case, under disturbance from attacker. 2) Under the background of harsh …
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On finite element solutions for bounded time-harmonic scattering problems with an exact nonlocal boundary condition.
… as the mesh is refined, including PML and the DtN map. We add to this literature by expanding on a recently-introduced exact nonlocal boundary condition utilizing layer potentials and Green's formulas, and we will explore both the Helmholtz and Maxwell equations with this setting. For the …
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Techniques For Alleviating the Inconveniences Caused by Mobility In Wireless Environments
… message scheduling in Delay Tolerant Networks (DTN), and message dissemination in Vehicular Ad Hoc Networks (VANET).</p> <p>In VoIP services provided in wireless mesh network (WMN), client mobility makes mesh node access authentication more difficult when user roams from the range of one Access …
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Boundary integral equation based numerical solutions of helmholtz transmission problems for composite scatters
… subdomains. For instance, Dirichlet-to-Neumann (DtN) operators of adjacent domains or suitable approximations of these can be used in the form of generalized Robin boundary conditions to increase the rate of the convergence of iterative solvers of DDM linear systems. The approximations of DtN …
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Estudo de SAR para quinoxalinas ativas frente ao Trypanossoma Brucei
… é considerada uma doença tropical negligenciada (DTN). Os tratamentos disponíveis atualmente para as DTNs são muito limitados e insuficientes, além de apresentarem baixa eficácia, elevada toxicidade e o surgimento de cepas resistentes. Derivados de quinoxalina apresentam importantes propriedades …
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Leveraging structure for communication in human-centric DTNs
… and robust communication in human-centric DTNs, which we show possible by taking advantage of inherent structure found in these networks. To accomplish this goal, and progress the state-of-the-art, we identify two categories of research that must be enhanced: (1) supporting tools and (2) …
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Decrease Arrival to CT Time to Improve Stroke Outcomes
… the target decrease of 20%. The door to needle (DTN) times experienced an overall average decrease of 32.1 % and met the AHA/ASA Target Stroke Phase II goal of 50% of t-PA cases treated < 45 minutes. Finally, patients who received t-PA after process initiation experienced a 2.5 decrease in length …
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Orchestra Framework: Protocol Design for Ad Hoc and Delay Tolerant Networks using Genetic Algorithms
… routing protocols for delay tolerant networks (DTNs). DTNs are a special type of ad hoc network characterized by intermittent connectivity, long propagation delays and high loss rate. Thus, traditional ad hoc routing approaches cannot be used in DTNs, and special features must be developed for …
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SECURE AND EFFICIENT INFORMATION MANAGEMENT IN DELAY(DISRUPTION) TOLERANT NETWORK
… paradigm, also called Delay-tolerant Networks (DTNs). In DTN, the limited bandwidth, energy, and contacts among the nodes, and their interdependency impose several challenges such as sensitive data leakage to malicious nodes, redundant data generation, limited and delayed important message …
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An IoT enabled system for marine data acquisition and cartography
… Network (MANET) and Delay Tolerant Network (DTN) routing according to the network connectivity. The low rate data transmission offered by VHF radio has been investigated in terms of the network bottlenecks and the data collection rate achiev- able near the sinks. A sensory data management and …
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