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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
261

Design of Suction Stabilized Floats for First Responder Localization via Ultra-Wideband (UWB) and Internet of Things (IoT)

January 2020 (has links)
abstract: Suction stabilized floats have been implemented into a variety of applications such as supporting wind turbines in off-shore wind farms and for stabilizing cargo ships. This thesis proposes an alternative use for the technology in creating a system of suction stabilized floats equipped with real time location modules to help first responders establish a localized coordinate system to assist in rescues. The floats create a stabilized platform for each anchor module due to the inverse slack tank effect established by the inner water chamber. The design of the float has also been proven to be stable in most cases of amplitudes and frequencies ranging from 0 to 100 except for when the frequency ranges from 23 to 60 Hz for almost all values of the amplitude. The modules in the system form a coordinate grid based off the anchors that can track the location of a tag module within the range of the system using ultra-wideband communications. This method of location identification allows responders to use the system in GPS denied environments. The system can be accessed through an Android app with Bluetooth communications in close ranges or through internet of things (IoT) using a module as a listener, a Raspberry Pi and an internet source. The system has proven to identify the location of the tag in moderate ranges with an approximate accuracy of the tag location being 15 cm. / Dissertation/Thesis / Masters Thesis Engineering 2020
262

Silent Partnership in the Age of Smart Technology

January 2020 (has links)
abstract: Smart technology is now pervasive in society and has partnered with people on every level, yet its social and cultural implications are easily overlooked by the majority. In this thesis, I work on building a silent partnership between humans and smart technology and creating smart devices/systems as silent partners by revealing the complexity of smart technology and tackling the current issues of unilateral transparency, a lack of negotiation, and the dynamic of the sense of control. This work draws on varied fields such as critical cultural studies, science and technology studies (STS), media studies, information studies, sociology, psychology, and design and consists of three main themes: materiality, politics, and affect. In addition, I utilize theoretical frameworks such as posthumanism, actor-network theory (ANT), assemblage, materialism, and affect theory to analyze the underlying factors and relationships among human and nonhuman actors such as technology companies, governments, engineers, designers, users, as well as infrastructure, algorithms, and smart devices/systems. Finally, I offer four roles to rethink smart technology (an actor, a fluid, a peer, and a silent partner) and propose 15 design principles to redesign smart devices/systems as silent partners. / Dissertation/Thesis / Masters Thesis Communication Studies 2020
263

An evaluation of how edge computing is enabling the opportunities for Industry 4.0

Svensson, Wictor January 2020 (has links)
Connecting factories to the internet and enable the possibilities for these to autonomously talk to each other is called the Industrial Internet of Things(IIoT) and is mentioned as Industry 4.0 in the terms of the industrial revolutions. The machines are collecting data through very many different sensors and need to share these values with each other and the cloud. This will make a large load to the cloud and the internet, and the latency will be large. To evaluate how the workload and the latency can be reduced and still get the same result as using the cloud, two different systems are implemented. One which uses cloud and one which using edge computing. Edge computing is when the processing of the data is decentralized to the edge of the network. This thesis aims to find out ”When is it more favorable to use an edge solution and when is it to prefer a cloud solution”. The first system is implemented with an edge platform, Crosser, the second system is implemented with a cloud platform, Azure. Both implementations are giving the same outputs but the differences is where the data is processed. The systems are measured in latency, bandwidth, and CPU usage. The result of the measurements shows that the Crosser system has less latency, using smaller bandwidth but is needing more computational power of the device which is on the edge of the network. The conclusion of the results is that it depends on the demands of the system. Is the demands that it should have low latency and not using much bandwidth Crosser is to prefer. But if a very heavy machine learning algorithm is going to be executed in the system and the latency and bandwidth size is not a problem then the Cloud Reference System is to prefer.
264

A Secure and Privacy-Friendly IP-based Emergency Services Architecture

Tschofenig, Hannes 28 November 2019 (has links)
No description available.
265

Automating the development of Physical Mobile Workflows. A Model Driven Engineering approach

Giner Blasco, Pau 17 May 2010 (has links)
La visión de la "Internet de las Cosas", hace énfasis en la integración entre elementos del mundo real y los Sistemas de Información. Gracias a tecnologías de Identificación Automática (Auto-ID) cómo RFID, los sistemas pueden percibir objetos del mundo físico. Cuando éstos participan de manera activa en los procesos de negocio, se evita el uso de los seres humanos como transportadores de información. Por tanto, el número de errores se reduce y la eficiencia de los procesos aumenta. Aunque actualmente ya es posible el desarrollo de estos sistemas, la heterogeneidad tecnológica en Auto-ID y los requisitos cambiantes de los procesos de negocio dificultan su construcción, mantenimiento y evolución. Por lo tanto, es necesaria la definición de soluciones que afronten la construcción de estos sistemas mediante métodos sólidos de desarrollo para garantizar la calidad final del producto. Partiendo de las bases de la Ingeniería Dirigida por Modelos (MDE), esta tesis presenta un proceso de desarrollo para la construcción de este tipo de sistemas. Este proceso cubre desde la especificación del sistema hasta su implementación, centrándose en los requisitos particulares del enlace entre los mundos físico y virtual. Para la especificación de los sistemas se ha definido un Lenguaje de modelado adaptado a los requisitos de la "Internet de las Cosas". A partir de esta especificación se puede obtener una solución software de manera sistemática. Como validación de la propuesta, ésta se ha aplicado en la práctica con usuarios finales. Pese a que el proceso de desarrollo no ofrece una automatización completa, las guías ofrecidas y la formalización de los conceptos implicados ha demostrado ser útil a la hora de elevar el nivel de abstracción en el desarrollo, evitando el esfuerzo de enfrentarse a detalles tecnológicos. / Giner Blasco, P. (2010). Automating the development of Physical Mobile Workflows. A Model Driven Engineering approach [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/8272 / Palancia
266

Servicio de Abastecimiento de GLP de la empresa MIGAS LIMA SA

Bustamante Palomino, Liz Evelyn, Delgado Herrera, Rosa Guadalupe, Estupiñan Peralta, Sandra Sofia 12 July 2020 (has links)
La empresa comercializadora de servicios MIGAS LIMA S.A emprende en la atención del mercado de abastecimiento de GLP a granel para abastecimiento y venta a empresas en los distritos de Lince, San Isidro, Miraflores y Barranco. Actualmente, desea aprovechar las favorables condiciones que genera la alta demanda de GLP para desarrollar una nueva línea de servicio digital que permita estar más involucrados como proveedor y cliente. Esta empresa, en etapa de creación, ha encontrado la necesidad de abastecimiento de un mercado que no es 100% atendido por la poca oferta que existe en la venta y reparto de gas a granel, ya que en la región Lima solo cuentan con 3 grandes proveedores: PETROPERÚ (Villa el Salvador), REPSOL (Ventanilla), LLAMAGAS (Independencia). Por lo tanto, el objetivo de este trabajo de investigación es demostrar la viabilidad del proyecto de MIGAS LIMA S.A en la búsqueda de desarrollar un proceso de venta y abastecimiento sólido y constante para su cartera de clientes y potenciales compradores, creando eficiencia e innovación desde las actividades principales de su cadena de valor, sobre todo en el plan de acción de su cadena logística e innovando en el sistema de control de consumo del gas y formas de facturación a través de un aplicativo que manejara de manera remota estas actividades en interacción con el cliente. / The service company MIGAS LIMA S.A undertakes to service the bulk LPG supply market for supply and sale to companies in the districts of Lince, San Isidro, Miraflores and Barranco. Currently, it wants to take advantage of the favorable conditions generated by the high demand for LPG to develop a new digital service line that allows it to become more involved as a supplier and customer. This company, in the creation stage, has found the need to supply a market that is not 100% served by the low supply that exists in the sale and distribution of bulk gas, since in the Lima region they only have 3 large suppliers: PETROPERÚ (Villa el Salvador), REPSOL (Ventanilla), LLAMAGAS (Independencia). Therefore, the objective of this research work is to demonstrate the viability of the MIGAS LIMA SA project in the search to develop a solid and constant sales and supply process for its portfolio of clients and potential buyers, creating efficiency and innovation from the main activities of its value chain, especially in the action plan of its logistics chain and innovating in the gas consumption control system and billing methods through an application that remotely manages these activities in interaction with the client. / Trabajo de investigación
267

Modeling the internet of things in configurable process models / Modélisation de l'internet des objets dans des modèles de processus configurables

Suri, Kunal 11 February 2019 (has links)
Un nombre croissant d’entreprises internationales ont adopté les systèmes d'information centrés-processus pour profiter des avantages de l'utilisation de processus rationalisés basés sur des modèles prédéfinis, également appelés modèles de processus métier. Cependant, l'environnement commercial dynamique actuel exige de la flexibilité et la réutilisation systématique des processus métier, qui se manifeste par l'utilisation de modèles de processus configurables (CPM). Ceci évite le développement de processus à partir de zéro, qui est à la fois une démarche fastidieuse et sujette à de nombreuses erreurs, et facilite le partage d'une famille de variantes de processus métier pouvant être personnalisées en fonction d'exigences métier concrètes. Par ailleurs, l'adoption des ressources de l'Internet des objets (IoT) dans les processus d'entreprise inter-organisationnels est également en croissante constante. Cependant, ces ressources IoT doivent être utilisées efficacement. Ces dispositifs IoT sont hétérogènes en raison de leurs propriétés et de leurs fabricants (normes propriétaires), ce qui pose des problèmes d’interopérabilité. De plus, étant limitées, elles doivent être allouées (et consommées) en gardant à l'esprit des contraintes, tels que le coût énergétique, le coût de calcul, etc. pour éviter les pannes pendant leurs consommations par les processus. Il est donc essentiel de modéliser explicitement la perspective des ressources IoT dans les modèles de processus métiers lors de la phase de conception. Dans la littérature, divers travaux de recherche dans le domaine de gestion des processus métier (BPM) sont généralement axés sur la perspective du flux de contrôle. Bien qu'il existe certaines approches axées sur la perspective des ressources, elles sont généralement dédiées à la perspective des ressources humaines. Ainsi, les travaux sur l'intégration de la perspective des ressources IoT dans les processus métier sont limités pour résoudre des problèmes liés à l'hétérogénéité. De même, dans le contexte des CPM, il n’existe aucune prise en charge de la configuration permettant de modéliser la variabilité des ressources IoT au niveau des CPM. Cette variabilité résulte des fonctionnalités spécifiques aux ressources IoT, telles que la possibilité de partage, et réplication, qui sont pertinentes dans le contexte des processus métier. Dans cette thèse, nous abordons les limitations susmentionnées en proposant une approche pour intégrer la perspective IoT dans le domaine du BPM et soutenir le développement de CPM. Ce travail propose les contributions suivantes: (1) il fournit une description formelle de la perspective des ressources IoT, et de ses relations avec le domaine BPM à l'aide de la technologie sémantique, et (2) il fournit de nouveaux concepts pour permettre l'allocation de ressources IoT configurables dans les CPM. Pour valider notre approche et démontrer sa faisabilité, nous procédons comme suit: (1) implémenter des outils preuve de concept qui soutiennent le développement de processus métier et de modèles de processus configurables conscient des IoT, et (2) réaliser des expérimentations sur des jeux de données de modèles de processus qui démontrent l’efficacité de notre approche et affirment sa faisabilité / On the one hand, a growing number of multi-national organizations have embraced the Process-Aware Information Systems (PAIS) to reap the benefits of using streamlined processes that are based on predefined models, also called as Business Process (BP) models. However, today's dynamic business environment demands flexibility and systematic reuse of BPs, which is provided by the use of Configurable Process Models (CPMs). It avoids the development of processes from scratch, which is both time-consuming and error-prone, and facilitates the sharing of a family of BP variants that can be customized based on concrete business requirements. On the other hand, the adoption of the Internet of Things (IoT) resources in various cross-organizational BPs is also on a rise. However, to attain the desired business value, these IoT resources must be used efficiently. These IoT devices are heterogeneous due to their diverse properties and manufactures (proprietary standards), which leads to issues related to interoperability. Further, being resource-constrained, they need to be allocated (and consumed) keeping in the mind relevant constraints such as energy cost, computation cost, to avoid failures during the time of their consumption in the processes. Thus, it is essential to explicitly model the IoT resource perspective in the BP models during the process design phase. In the literature, various research works in Business Process Management (BPM) domain are usually focused on the control-flow perspective. While there do exist some approaches that focus on the resource perspective, they are typically dedicated to the human resource perspective. Thus, there is limited work on integrating the IoT resource perspective into BPs, without any focus on solving issues related to heterogeneity in IoT domain. Likewise, in the context of CPMs, there is no configuration support to model IoT resource variability at the CPM level. This variability is a result of specific IoT resource features such as Shareability and Replication that is relevant in the context of BPs. In this thesis, we address the aforementioned limitations by proposing an approach to integrate IoT perspective in the BPM domain and to support the development of IoT-Aware CPMs. This work contributes in the following manner: (1) it provides a formal description of the IoT resource perspective and its relationships with the BPM domain using semantic technology and (2) it provides novel concepts to enable configurable IoT resource allocation in CPMs. To validate our approach and to show its feasibility, we do the following: (1) implement proof of concept tools that assist in the development of IoT-aware BPs and IoT-aware CPMs and (2) perform experiments on the process model datasets. The experimentation results show the effectiveness of our approach and affirm its feasibility
268

Monitorage des réseaux des capteurs sans fils (WSN) : application à l'interopérabilité sécurisée / Wireless Sensors Networks (WSN) monitoring : application to secure interoperability

Fuentes Samaniego, Raul Armando 27 February 2017 (has links)
La formule "Internet of Things'' a pris du sens à la fois au sein de la communauté public et de recherche. La raison principale est qu'en 2011, le nombre d'objets connectés à Internet surpassent le nombre d'humains en ligne, et il est attendu qu'en 2020, le nombre d'objets connectés dépassent les 20 billions. Etant donné la présence d'un grand nombre de plateformes hétérogènes qui composent l'IoT, notre intérêt se focalise sur les Réseaux de Capteurs (WSN), qui sont composés des petits dispositifs avec des contraintes de ressources (capacité de mémoire faible, processeur de faible puissance et faible puissance matérielle) qui collectent un ou plusieurs types de données. Presque toutes les recherches menées à ce jour reposent sur la standardisation de protocoles de communication, l'amélioration de la performance, l'optimisation de la consommation de ressources, etc. La sécurité a été reléguée au second plan, dû principalement au faibles ressources disponibles sur les capteurs. Cependant, les données collectées dans de multiples scénarios peuvent être très sensibles. Les données doivent être stockées de manière sûr et doivent être transmises de manière sûr d'un point à un autre. Le travail développé dans cette thèse définit les mécanismes permettant de garantir une communication sûr entre les capteurs. Et aussi fournissant des outils natifs pour le monitorage des communications, afin de valider ces mécanismes directement sur le réseaux / The denominated "Internet of Things'' (IoT) has been getting relevance in both the public and research communities. The main reason is that on 2011, the number of “objects” connected to the Internet surpassed the number of humans online, and is expected that for 2020, the number of objects exceeds the amount of 20 billion. Because of the high number of heterogeneous platforms that composed the IoT, our interest is centered around the Wireless Sensors Networks (WSN), which are composed by small devices with constrained resources (small amount of memory, small power processor, and small power supply) that collect one or more type of data. Almost all the research conducted to date relies on standardizing the communication protocols, ameliorating the performance, optimizing the resource consumption, etc. Security has been relegated to a second plane, due mainly to the low resources available on the sensors. However, the data collected in many scenarios can be highly sensitive. The data must be stored in a safe way and must be transmitted in a safe approach from the origin to the destiny. The work developed in this dissertation defines mechanisms to guarantee the safety of the communication between sensors. And, providing native tools for the monitoring of the communication, to validate these mechanisms directly on the network
269

Complexity Control for Low-Power HEVC Encoding / Contrôle de la complexité pour l'encodage HEVC basse consommation d'énergie

Mercat, Alexandre 07 December 2018 (has links)
L'Internet des objets (loT) est devenu une réalité et ses applications pressenties vont fortement augmenter la demande de vidéo mobile. En conséquence, les systèmes montent en complexité algorithmique et le portage du codage vidéo sur plates-formes embarquées devient problématique. Les nouveaux contenus vidéo 4K et 360°, venant avec des résolutions spatiales (8K, 16K) et temporelles (120 images/seconde élevées compliquent encore le problème. Il est donc nécessaire de réduire l'empreinte des nouveaux codec tels que HEVC tout en préservant les performances en compression et en qualité d'image de ces codecs, La performance énergétique limitée des batteries des systèmes embarqués pousse à proposer de nouvelle méthodes pour ajuster et contrôler la complexité et l'énergie des codecs HEVC. Ce document propose un ensemble d'études dont l'objectif est d'ajuster et de contrôler la complexité et donc la consommation énergétique de l'encodeur HEVC. Deux méthodes de prédiction de découpe de CTU sont proposées : la première basée sur une approche statistique utilisant la variance de l'image et la seconde utilisant l'intelligence artificielle. À partir de cette prédiction, une méthode est proposée pour ajuster la complexité de l'encodage HEVC. Cette solution étend l'espace de recherche autour de la prédiction et alloue la complexité dans l'image afin de minimiser les dégradations en termes de compression et de qualité. Enfin un système de contrôle temps réel de la complexité d'encodage est proposé. Il démontre l'applicabilité de contributions de ce document en maintenant la complexité d'encodage proche d'une consigne. / The Internet of Things (loT) is now a reality. Forthcoming applications will boost mobile video demand to an unprecedented level. The induced increase in computational complexity is a challenge when executing in real-time new video coding standards on embedded platforms, limited in computing, memory, and energy. New 4K UHD and 360-degree video contents coming with high spatial (SK, 16K) and temporal (120fp resolutions further complicate the problem. In this context, codecs such as HEVC (High Efficiency Vide Coding) must be worked on to reduce their complexity while preserving the bitrate and image quality. Th bounded energy density of embedded system's batteries requires designers to propose new methods scaling and controlling the complexity and energy consumption of HEVC codecs. This document presents a set of studies aiming at scaling and controlling the complexity, and therefore the energy consumption, of HEVC Intra encoding. Two methods of quad-tree partitioning prediction in "one-shot are proposed: one based on variance-aware statistic approach and one based on Machine Learning using data-mining classifiers. From the obtained prediction, a generic tunable complexity scheme of HEVC encoding is introduced. It expands the search space around the original partitioning prediction and allocates complexit in a frame while minimizing performance loss in terms of bitrate and visual quality. Finally, a real-time contr system is created that dynamically manages the encoding process to keep the encoding complexity under specific tarjet. It demonstrates the a licability of the mayor contributions of this document.
270

SYSTEM DESIGN AND DEVELOPMENT FOR VISUAL PROGRAMMING OF ROBOT-IOT WORKFLOWS

Pawan Sudhindra Rao (6866039) 12 October 2021 (has links)
<p>Autonomous Mobile Robots (AMR) and IoT (Internet of Things) devices have substantial potential to increase productivity in Small and Medium Enterprises (SME). However, factors such as high costs involved in setting up and maintaining AMR automation and deficit of programming expertise among factory workers render AMR automation uneconomical for SMEs. </p><p><br></p><p></p><p>Visual Programming can be used in the spatial context of the operating environment to enable closer mental models at the right level of abstraction for novice programmers. In this thesis, we develop a system for deploying a Spatially Situated Visual Language (SSVL) for programming robot-IoT workflows. To address the challenges of interoperability, scalability, and versatility of industrial machinery, we develop a novel communication protocol based on the Resource Description Framework (RDF). Our communication protocol forms the basis of a system architecture that integrates SSVL, IoT devices, and mobile robots that enables factory workers to program AMR workflows. We design, implement and validate the system and the architecture following the systems engineering approach. To evaluate the system developed in an industrial context, we deploy the system to author AMR workflows for material handling application for an SME painting factory.</p><p></p>

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