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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

Towards Cloud-based Vehicular Cyber-physical Systems

Alam, Kazi Masudul January 2017 (has links)
We are living in the age of information technology, where we are fully occupied with the revolutionary innovations of the last few decades such as the Internet, mobile devices, wireless communications, social networks, wearables, cloud computing, etc. While these technologies have become integral part of our daily life, we are now anxiously waiting to embrace Internet-of-Things (IoT), intelligent digital assistants, driver-less cars, drone deliveries, virtual reality, and smart city applications. Recently, research community is demonstrating increasing interests about Cyber-Physical Systems (CPS) that resides in the cross-section of embedded systems, network communications, and scalable distributed infrastructures. The main responsibility of a CPS is to collect sensory data about the physical world and to inform the computation module using communication technologies that processes the data, identifies important insights and notifies back using a feedback loop. These notifications can however be control commands to reconfigure the physical world. Such a setup is a useful method to deploy smart city applications. In this dissertation, we keep our focus onto the smart transport objective using vehicular CPS (VCPS) based systems organization. We have compiled this dissertation with our research contributions in this growing field of VCPS. One of our key contributions in this field is an architecture reference model for the cloud-based CPS, C2PS, where we analytically describe the key properties of a CPS: computation, communication and control, while integrating cloud features to it. We have identified various types of computation and interaction modes of this paradigm as well as describe Bayesian network and fuzzy logic based smart connection to select a mode at any time. It is considered that the true adoption of CPS is only possible through the deployment of the IoT systems. Thus, it is important to have IoT as a foundation in the CPS architectures. Our next contribution is to leverage existing Vehicular Adhoc Network (VANET) technologies and map them with the standard IoT-Architecture reference model to design the VCPS, Social Internet-of-Vehicles (SIoV). In this process, we have identified the social structures and system interactions among the subsystems involved in the SIoV. We also present a message structure to facilitate different types of SIoV interactions. The ability of dynamic reconfiguration in a C2PS is very appealing. We capture this feature in the VCPS by designing a model-based reconfiguration scheme for the SIoV, where we measure the data workloads of distinct subsystems involved in various types of SIoV interactions. We further use these models to design dynamic adaptation schemes for the subsystems involved in VCPS interactions. Our final contribution is an application development platform based on C2PS design technique that uses server-client based system communications. In this platform, server side is built using JAVA, client side uses Android, message communication uses JSON and every component has its own MySQL database to store the interactions. We use this platform to emulate and deploy SIoV related applications and scenarios. Such a platform is necessary to continue C2PS related research and developments in the laboratory environment.
262

Industry 4.0 with a Lean perspective - Investigating IIoT platforms' possible influences on data driven Lean

De Vasconcelos Batalha, Alex, Parli, Andri Linard January 2017 (has links)
Purpose: To investigate possible connections between an Industrial Internet of Things (IIoT) system, such as Predix, and data driven Lean practises. The aim is to examine if an IIoT platform can improve existing practises of Lean, and if so, which Lean tools are most likely influenced and how this is.Design/Methodology: The paper follows a phenomenon-based research approach. The methodology contains of a mix of primary and secondary data. The primary data was obtained through “almost unstructured” interviews with experts, while the secondary data comprises of a comprehensive review of existing literature. Moreover, a model was developed to investigate the connections between the concepts of IIoT and Lean.Findings: Findings derived from expert interviews at General Electric (GE) in Uppsala have led to the conclusion that Predix fulfils the necessary requirements to be considered an IIoT platform. However, the positive effects of the platform on the selected Lean tools could not be found. Only in one instance improved Predix the effectiveness of a Lean tool. Overall, data analytic efforts are performed and let to better in-process control. However, these efforts were independent from the Lean efforts carried out. There was no increase in data collection or analytics due to the Lean initiative and Predix is not utilised for data collection, storage, or analysis. It appears that the pharmaceutical industry is fairly slow in adapting new technologies. Firstly, the high regulatory requirements inherent within the pharmaceutical industry limit the application of cutting edge technology by demanding strict in-process control and process documentation. Secondly, the sheer size of GE itself slows down the adoption of new technology. Lastly, the pragmatic approach of the top management to align the digital strategies of the various industries and thereof resulting allocation of resources to other more technologically demanding businesses hinders the use of Predix at GE in Uppsala.
263

Comparison of Wireless Communication Technologies used in a Smart Home : Analysis of wireless sensor node based on Arduino in home automation scenario

Horyachyy, Oleh January 2017 (has links)
Context. Internet of Things (IoT) is an extension of the Internet, which now includes physical objects of the real world. The main purpose of Internet of Things is to increase a quality of people’s daily life. A smart home is one of the promising areas in the Internet of Things which increases rapidly. It allows users to control their home devices anytime from any location in the world using Internet connectivity and automate their work based on the physical environment conditions and user preferences. The main issues in deploying the architecture of IoT are the security of the communication between constrained low-power devices in the home network and device performance. Battery lifetime is a key QoS parameter of a battery-powered IoT device which limits the level of security and affects the performance of the communication. These issues have been deepened with the spread of cheap and easy to use microcontrollers which are used by electronic enthusiasts to build their own home automation projects. Objectives. In this study, we investigated wireless communication technologies used in low-power and low-bandwidth home area networks to determine which of them are most suitable for smart home applications. We also investigated the correlation between security, power consumption of constrained IoT device, and performance of wireless communication based on a model of a home automation system with a sensor node. Sensor node was implemented using Arduino Nano microcontroller and RF 433 MHz wireless communication module. Methods. To achieve the stated objectives of this research following methods were chosen: literature review to define common applications and communication technologies used in a smart home scenario and their requirements, comparison of wireless communication technologies in smart home, study of Arduino microcontroller technology, design and simulation of a part of  home automation project based on Arduino, experimental measurements  of execution time and power consumption of Arduino microcontroller with RF 433 MHz wireless module when transmitting data with different levels of security, and analysis of experimental results. Results. In this research, we presented a detailed comparison of ZigBee, WiFi, Bluetooth, Z-Wave, and ANT communication technologies used in a smart home in terms of the main characteristics. Furthermore, we considered performance, power consumption, and security. A model of a home automation system with a sensor node based on Arduino Nano was described with sleep management and performance evaluation. The results show that the battery lifetime of Arduino in a battery-powered sensor node scenario is determined by the communication speed, sleep management, and affected by encryption. Conclusions. The advanced communication strategy can be used to minimize the power consumption of the device and increase the efficiency of the communication. In that case, our security measures will reduce the productivity and lifetime of the sensor node not significantly. It’s also possible to use symmetric encryption with smaller block size.
264

Internet of Things as a new disruptive concept for future global business / Internet of Things as a new disruptive concept for future global business

Kalenda, Tomáš January 2015 (has links)
The goal of the thesis is to provide investors and established businesses insights into the evolving concept of Internet of Things in the context of a business opportunity. First, the thesis provides comprehensive overview of the IoT concept, its historical development and relevant concepts similar to IoT including its definition and explanation. Second, the thesis discusses IoT as a disruptive technology with implications for general business strategy, current business models, value chains and competitive landscape. Third, it describes overwhelming opportunities for IoT application in various business fields and processes bringing added value to its stakeholders. Visionary concepts and applicable use cases are identified. Finally, the thesis analyses IoT market perception from both customer and business perspective based on quantitative and qualitative data researched. The research is focused mainly on customer awareness and value perception of IoT products as well as major drivers and challenges of the IoT market from business players' perspective. Such analytical insights identify major patterns and dynamism of the IoT market.
265

Uma abordagem para a integração de sistemas industriais aplicando o conceito de internet das coisas e de modelos semanticos no contexto da industria 4.0 / An approach for the integration of industrial systems through the adoption of the internet of things and semantic model concepts in the industry 4.0 context

Steinmetz, Charles January 2018 (has links)
Com a chegada da era da computação ubíqua, o número de dispositivos com poder computacional vêm crescendo de forma acelerada. A conexão desses dispositivos em uma rede de comunicação traz novas possibilidades e serve como base para o conceito chamado Internet das Coisas (Internet of Things - IoT). Uma das aplicações desse conceito é no domínio industrial e está impulsionando uma nova revolução industrial, a chamada Indústria 4.0. Esta pesquisa apresenta uma abordagem de integração de componentes de forma automatizada, no contexto da Indústria 4.0, utilizando ontologias para representar os elementos do sistema e um middleware IoT para servir de meio de integração. Essa abordagem utiliza conceitos propostos em trabalhos relacionados, com características inovadoras na criação de sistemas IoT. Dentre estas está a integração automatizada a partir de modelos semânticos, que possibilita que usuários modelem sistemas em alto nível. A partir desse modelo, as interfaces de comunicação são criadas automaticamente, trazendo uma garantia de consistência sintática nas chamadas de métodos ou funções. Além disso, a pesquisa proposta traz a possibilidade de usar esse mesmo modelo semântico para apresentar as informações ao usuário final. Como resultados deste trabalho podem ser ressaltados o desenvolvimento de uma ontologia para modelar esses elementos industriais e também o de uma extensão para um middleware IoT a fim de poder-se trabalhar com esses modelos de forma automatizada. / With the advent of the ubiquitous computing era, the number of devices with computing power is growing rapidly. The connection of these devices onto a communication network brings new possibilities and serves as the basis for the concept called the Internet of Things (IoT). One of the applications of this concept is in the industrial domain where it is driving a new industrial revolution, usually designated as “Industry 4.0”. This research study presents a automated integration approach in the context of Industry 4.0, using ontologies to represent elements of the system and an IoT middleware to provide a means for its integration. This approach uses concepts proposed in related works with innovative features regarding the creation of IoT systems. Among these features, an automated integration based on semantic models is proposed, which enables users to model their systems at a high level. From this model, communication interfaces are created automatically, bringing a guarantee of syntactic consistency in calling methods or functions. Another advantage that this work brings is the possibility of using this same semantic model to present information to the end user. As result of this work, an ontology was developed to model industrial elements, and an extension for an IoT middleware was developed to enable to work with these models.
266

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
267

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
268

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.
269

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

Tschofenig, Hannes 28 November 2019 (has links)
No description available.
270

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

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