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Jonsson, Andreas. "Studies on heterogeneous packet switched networks /." Luleå, 2005. http://epubl.luth.se/1402-1757/2005/056.
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Shen, Xiaochuan. "Streaming video optimisation in heterogeneous Internet traffic environment." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609573.
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Puschmann, Daniel Philip. "Extracting information from heterogeneous 'Internet of Things' data streams." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/847053/.
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Recent advancements in sensing, networking technologies and collecting real-world data on a large scale and from various environments have created an opportunity for new forms of services and applications. This is known under the umbrella term of the Internet of Things (IoT). Physical sensor devices constantly produce very large amounts of data. Methods are needed which give the raw sensor measurements a meaningful interpretation for building automated decision support systems. One of the main research challenges in this domain is to extract actionable information from real-world data, that is information that can readily be used to make informed automatic decisions in intelligent systems. Most existing approaches are application or domain dependent or are only able to deal with specific data sources of one kind. This PhD research concerns multiple approaches for analysing IoT data streams. We propose a method which determines how many different clusters can be found in a stream based on the data distribution. After selecting the number of clusters, we use an online clustering mechanism to cluster the incoming data from the streams. Our approach remains adaptive to drifts by adjusting itself as the data changes. The work is benchmarked against state-of-the art stream clustering algorithms on data streams with data drift. We show how our method can be applied in a use case scenario involving near real-time traffic data. Our results allow to cluster, label and interpret IoT data streams dynamically according to the data distribution. This enables to adaptively process large volumes of dynamic data online based on the current situation. We show how our method adapts itself to the changes and we demonstrate how the number of clusters in a real-world data stream can be determined by analysing the data distributions. Using the ideas and concepts of this approach as a starting point we designed another novel dynamic and adaptable clustering approach that is more suitable for multi-variate time-series data clustering. Our solution uses probability distributions and analytical methods to adjust the centroids as the data and feature distributions change over time. We have evaluated our work against some well-known time-series clustering methods and have shown how the proposed method can reduce the complexity and perform efficient in multi-variate datastreams. Finally we propose a method that uncovers hidden structures and relations between multiple IoT data streams. Our novel solution uses Latent Dirichlet Allocation (LDA), a topic extraction method that is generally used in text analysis. We apply LDA on meaningful labels that describe the numerical data in human understandable terms. To create the labels we use Symbolic Aggregate approXimation (SAX), a method that converts raw data into string-based patterns. The extracted patterns are then transformed with a rule engine into the labels. The work investigates how heterogeneous sensory data from multiple sources can be processed and analysed to create near real-time intelligence and how our proposed method provides an efficient way to interpret patterns in the data streams. The proposed method provides a novel way to uncover the correlations and associations between different pattern in IoT data streams. The evaluation results show that the proposed solution is able to identify the correlation with high efficiency with an F-measure up to 90%. Overall, this PhD research has designed, implemented and evaluated unsupervised adaptive algorithms to analyse, structure and extract information from dynamic and multi-variate sensory data streams. The results of this research has significant impact in designing flexible and scalable solutions in analysing real-world sensory data streams and specially in cases where labelled and annotated data is not available or it is too costly to be collected. Research and advancements in healthcare and smarter cities are two key areas that can directly from this research.
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Mateus, Márcio Filipe Caetano. "Measuring data transfer in heterogeneous IoT environments." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/7580.
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Dissertação para obtenção do Grau de Mestre em
Engenharia Electrotécnica e de ComputadoresInternet of Things (IoT) is characterised by the heterogeneity of the used devices, which leads to information exchange problems. To address these problems, the Plug’n’Interoperate approach is used, where the steps needed to perform the information exchange between devices are described by interoperability specifications (IS) and are operated by the devices. However, more than one IS can exist to describe the information exchange between each pair of devices, so to choose the suitable IS, there is the need to measure the information exchange described by each one. To do this, there already exist some methods. But, they rely on a deep understanding of the IS and the data formats involved. To overcome this, an advanced measurement method is presented. This method advances by measuring the data transfer provided by an IS, without the need of specific knowledge about it. This measurement does that, by relying only on an abstract view of the data transfer and providing results that allows the benchmarking of the entire interoperability performance of the IoT environment. Thus allowing the comparison of different IS without the need of being specialized on them.
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Liu, Dongyu. "Efficient resource management for heterogeneous devices accessing Internet streaming content." Fairfax, VA : George Mason University, 2009. http://hdl.handle.net/1920/5633.
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Thesis (Ph.D.)--George Mason University, 2009.Vita: p. 127. Thesis director: Songqing Chen. Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Computer Science. Title from PDF t.p. (viewed Nov. 11, 2009). Includes bibliographical references (p. 120-126). Also issued in print.
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Chang, He. "Server selection for heterogeneous cloud video services." HKBU Institutional Repository, 2017. http://repository.hkbu.edu.hk/etd_oa/419.
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Server selection is an important problem of cloud computing in which cloud service providers direct user demands to servers in one of the multiple data centers located in different geographical locations. The existing solutions usually assume homogeneity of cloud services (i.e., all users request the same type of service) and handle user demands in an individual basis which incurs high computational overhead. In this study, we propose a new and effective server selection scheme in which diversities of cloud services are taken into account. We focus on a specific cloud service, i.e., online video service, and assume that different videos have different bandwidth requirements. We group users into clusters and handle user demands on a cluster basis for faster and more efficient process. Firstly, we assume that user demands and bandwidth capacities of servers are given in the data centers, our problem is to assign the user demands to the servers under the bandwidth constraint, such that the overall latency (measured by the network distance) between the user clusters and the selected servers is minimized. We design a server selection system and formulate this problem as a linear programming formulation which can be solved by existing techniques. The system periodically executes our scheme and computes an optimal solution for server selection. User demands are assigned to the servers according to the optimal solution and the minimum overall latency can be achieved. The simulation results show that our scheme is significantly better than the random algorithm and the YouTube server selection strategy. Based on the first part, we take the storage capacities of servers constraint into consideration. In the second part, our new problem is to assign the user demands to the servers under the bandwidth and storage constraint, such that the function of overall latency (measured by the network distance) between the user clusters and the selected servers and standard deviation of traffic load of every server in the system is minimized. We design a server selection system and formulate this problem which can be solved by existing techniques. User demands are assigned to the servers according to the optimal solution and the two goals (minimum overall latency and the most balanced traffic load) can be achieved. The simulation results show the influence of different weights of these two goals on the user demands assigning.
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Akan, Ozgur Baris. "Advanced Transport Protocols for Next Generation Heterogeneous Wireless Network Architectures." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5231.
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The revolutionary advances in the wireless communication technologies are inspiring the researchers to envision the next generation wireless networking architectures, i.e., Next Generation Wireless Internet (NGWI), InterPlaNetary (IPN) Internet, and Wireless Sensor Networks (WSN). There exist significant technological challenges for the realization of these envisioned next generation network architectures. NGWI will be the convergence of the Internet and heterogeneous wireless architectures, which have diverse characteristics and hence pose different sets of research challenges, to achieve anywhere, anytime seamless service to the mobile users. Similarly, the unique characteristics and challenges posed by deep space communications call for novel networking protocols to realize the IPN Internet objective. Furthermore, in order to realize the potential gains of WSN, it is imperative that communication challenges imposed by resource constraints of sensor nodes must be efficiently addressed with novel solutions tailored to the WSN paradigm. The objective of this research is to develop new advanced transport protocols for reliable data transport and real-time multimedia delivery in the next generation heterogeneous wireless network architectures. More specifically, the analytical rate control (ARC) protocol for real-time multimedia delivery is first proposed for wired/wireless hybrid networks. Next, a new rate control scheme (RCS) is proposed to achieve high throughput performance and fairness for real-time multimedia traffic over the satellite links. The unified adaptive transport layer (ATL) suite and its protocols for both reliable data transport (TCP-ATL) and real-time multimedia delivery (RCP-ATL) are introduced for the NGWI. A new reliable transport protocol for data transport in the IPN Internet (TP-Planet) is then proposed to address the unique challenges of the IPN Internet backbone links. A new integrated tranmission protocol (ITP) is then proposed for reliable data transport over multihop IPN Internet paths. Finally, the event-to-sink reliable transport (ESRT) protocol is proposed to achieve reliable event transport with minimum energy expenditure in WSN.
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El, Khatib Hazem Turki. "Integrating information from heterogeneous databases using agents and metadata." Thesis, Heriot-Watt University, 2000. http://hdl.handle.net/10399/1214.
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Teixeira, Tiago André Rolo. "Organising interoperability information on highly dynamic and heterogeneous environments." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/7582.
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Dissertação para obtenção do Grau de Mestre em
Engenharia Electrotécnica e de ComputadoresThe “Internet of Things” is a dynamic global network infrastructure where physical and virtual “things” communicate and share information amongst themselves. Plug and Interoperate is an approach that allows heterogeneous “things” to plug (into data) and seamlessly exchange information within the environment. To allow that, Plug and Interoperate needs to have the comprehension about the existing interoperability information. For this, the interoperability information needs to be duly organised. However, and in the “Internet of Things”, this presents major challenges. First, it is difficult to index all interoperability information due to the “things” heterogeneity (many and different languages and formats) and due to the dynamics of the system (disparate things entering/leaving the environment at all times). Also, that the environment can be used with much different purposes, which hinders the way on how the interoperability information should be organised. So, an architecture of an Interoperability Repository System is presented, in order to organise all interoperability information in this kind of environments. The solution handles heterogeneous interoperability information and allows users to add a User Space to the repository in order to customise it to specific needs. It also provides a notification mechanism in order to notify users of new or updated interoperability information.
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Rodrigues, Gabriel Siqueira. "Autonomic goal-driven deployment in heterogeneous computing environments." reponame:Repositório Institucional da UnB, 2016. http://repositorio.unb.br/handle/10482/23185.
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Dissertação (mestrado)—Universidade de Brasília, Instituto de Ciências Exatas, Departamento de Ciência da Computação, 2016.Submitted by Fernanda Percia França (fernandafranca@bce.unb.br) on 2017-03-03T18:16:47Z No. of bitstreams: 1 2016_GabrielSiqueiraRodrigues.pdf: 1418859 bytes, checksum: 2ee51220d6f243fc8432fb73a19952c2 (MD5)
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Vemos um crescente interesse em aplicações que devem contar com ambientes de computação heterogêneos, como a Internet das Coisas (IoT). Esses aplicativos são destinados a executar em uma ampla gama de dispositivos com diferentes recursos computacionais disponíveis. Para lidar com algum tipo de heterogeneidade, como dois tipos possíveis de processadores gráficos em um computador pessoal, podemos usar abordagens simples como um script que escolhe a biblioteca de software certa a ser copiada para uma pasta. Essas abordagens simples são centralizadas e criadas em tempo de design. Eles requerem um especialista ou equipe para controlar todo o espaço de variabilidade. Dessa forma, essas abordagens não são escaláveis para ambientes altamente heterogêneos. Em ambientes altamente heterogêneos, é difícil prever o ambiente computacional em tempo de projeto, implicando provavelmente indecidibilidade na configuração correta para cada ambiente. Em nosso trabalho, propomos GoalD: um método que permite a implantação autônoma de sistemas, refletindo sobre os objetivos do sistema e seu ambiente computacional. Por implantação autônoma, queremos dizer que o sistema é capaz de encontrar o conjunto correto de componentes para o ambiente computacional alvo, sem intervenção humana. Nós avaliamos nossa abordagem em um estudo de caso: conselheiro de estação de abastecimento, onde uma aplicação aconselha um motorista onde reabastecer / recarregar seu veículo. Nós projetamos a aplicação com variabilidade em nível de requisitos, arquitetura e implantação, o que pode permitir que a aplicação projetada seja executada em diferentes dispositivos. Para cenários com diferentes ambientes, foi possível planejar a implantação de forma autônoma. Além disso, a escalabilidade do algoritmo que planeja a implantação foi avaliada em um ambiente simulado. Os resultados mostram que usando a abordagem é possível planejar de forma autônoma a implantação de um sistema com milhares de componentes em poucos segundos.
We see a growing interest in computing applications that should rely on heterogeneous computing environments, like Internet of Things (IoT). Such applications are intended to execute in a broad range of devices with different available computing resources. In order to handle some kind of heterogeneity, such as two possible types of graphical processors in a desktop computer, we can use simple approaches as a script at deployment-time that chooses the right software library to be copied to a folder. These simple approaches are centralized and created at design-time. They require one specialist or team to control the entire space of variability. However, such approaches are not scalable to highly heterogeneous environments. In highly dynamic and heterogeneous environment it is hard to predict the computing environment at design-time, implying likely undecidability on the correct configuration for each environment at design-time. In our work, we propose GoalD: a method that allows autonomous deployment of systems by reflecting about the goals of the system and its computing environment. By autonomous deployment, we mean that the system can find the correct set of components, for the target computing environment, without human intervention. We evaluate our approach on the filling station advisor case study where an application advises a driver where to refuel/recharge its vehicle. We design the application with variability at requirements, architecture, and deployment, which can allow the designed application be executed in different devices. For scenarios with different environments, it was possible to plan the deployment autonomously. Additionally, the scalability of the algorithm that plan the deployment was evaluated in a simulated environment. Results show that using the approach it is possible to autonomously plan the deployment of a system with thousands of components in few seconds.
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Tsang, Cheuk-kan Ken, and 曾卓勤. "Vertical handoff in heterogeneous wireless networks with mSCTP." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40687636.
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Tsang, Cheuk-kan Ken. "Vertical handoff in heterogeneous wireless networks with mSCTP." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B40687636.
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Mikhaylov, K. (Konstantin). "Plug and play reconfigurable solutions for heterogeneous IoT." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526218410.
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Abstract The world is rapidly developing into a networked society, where people, machines, data, services and applications are tightly integrated by means of information and communications technology. The members of Wireless Sensor requires solutions to support the unprecedented level of the system’s pervasion and heterogeneity, solutions which are missing today. Today’s device-level design procedures are an obstacle in the transition to this heterogeneous future, which demands diverse Internet of Things (IoT) devices, including low-end and low-power ones. Reducing the design and production costs of devices in low to mid-scale production quantities, requires new approaches to cope with application versatility. To address this problem, this thesis proposes a novel wireless sensor and actuator network (WSAN)/IoT device design methodology based on the combination of two approaches: platform-based design and autoconfiguration, that are applied to hardware (HW) and software (SW) components. Unlike the state-of-the-art methodologies, the methodology proposed enables more flexibility both during the design and after device deployment, while reducing the development expenses and time-to-market. Although neither of the two these approaches is fundamentally novel on its own, in this thesis they are employed in, and adapted to, extremely resource restricted systems. The feasibility of the methodology is shown by the development of technology artifact representing a Plug-and-Play enabled WSAN/IoT device platform. The new devices are assembled from HW modules, encapsulating the various power supply, processing, transceiver, sensor and actuator units, or sets of those. The central control unit of a device automatically identifies the HW, and configures the SW accordingly. The technology enablers for this - the HW and SW architectures and interfaces – are reported in this thesis. Experimentation confirms the viability of the proposed concepts and mechanisms. The utility of the designed solutions has been shown by a series of successful research projects and experimental resultsTiivistelmä Maailma on nopeasti muuttumassa verkottuneeksi yhteisöksi, jossa ihmiset, koneet, tiedot, palvelut ja sovellukset ovat integroituneet tiiviisti yhteen tieto- ja viestintätekniikan avulla. Tämän dynaamisen ihmisten ja koneiden välisen yhteisön jäsenillä on erilaisia ja jopa ainutlaatuisia kykyjä. Tämän vision toteutuminen edellyttää toistaiseksi puuttuvia ratkaisuja, jotka tukevat ennennäkemättömän laajalle levinnyttä ja hajanaista järjestelmää. Nykyiset laitetason suunnittelumenetelmät estävät siirtymisen tähän heterogeeniseen tulevaisuuteen, joka edellyttää monipuolisia IoT-laitteita (Internet of Things, esineiden internet), mukaan lukien yksinkertaiset ja vähän virtaa kuluttavat laitteet. Tuotantomääriltään pienten ja keskisuurten laitteiden suunnittelu- ja tuotantokustannusten vähentäminen edellyttää uusia lähestymistapoja sovellusten monipuolisuuden vuoksi. Tutkielmassa ehdotetaan tämän ongelman ratkaisuksi uutta langattomien antureiden ja toimilaitteiden verkon (WSAN) / IoT-laitteiden suunnittelumenetelmää, joka perustuu näiden kahden lähestymistavan yhdistelmään: käyttöympäristöön perustuva rakenne ja automaattinen määritys, joita sovelletaan sekä laitteisto- että ohjelmistokomponentteihin. Toisin kuin nykyiset johtavat menetelmät, ehdotettu menetelmä on joustavampi sekä suunnitteluvaiheessa että laitteen käyttöönoton jälkeen. Tämä vähentää kehityskustannuksia ja laitteen markkinoille tuomiseen tarvittavaa aikaa. Vaikka kumpikaan menetelmä ei ole lähtökohtaisesti uusi, tutkielmassa niitä käytetään järjestelmissä, joissa on äärimmäisen rajoitetut resurssit, ja ne sovitetaan niihin. Menetelmän käyttökelpoisuutta esitellään kehittämällä Plug and Play –yhteensopivaa WSAN-/IoT-laiteympäristöä edustava tekninen artefakti. Uudet laitteet kootaan laitteistomoduuleista, joissa on erilaisia virtalähteitä, prosessori-, lähetin-vastaanotin-, anturija toimilaiteyksikköjä tai niistä koostuvia kokonaisuuksia. Laitteen keskusyksikkö tunnistaa laitteiston automaattisesti ja konfiguroi sen. Tutkielmassa kerrotaan, mitä teknologiaa eli laitteisto- ja ohjelmistoarkkitehtuureja ja -rajapintoja sovelluksessa on käytetty
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Botero, Oscar. "Heterogeneous RFID framework design, analysis and evaluation." Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00714120.
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The Internet of Things paradigm establishes interaction and communication with a huge amount of actors. The concept is not a new-from-scratch one; actually, it combines a vast number of technologies and protocols and surely adaptations of pre-existing elements to offer new services and applications. One of the key technologies of the Internet of Things is the Radio Frequency Identification just abbreviated RFID. This technology proposes a set of solutions that allow tracking and tracing persons, animals and practically any item wirelessly. Considering the Internet of Things concept, multiple technologies need to be linked in order to provide interactions that lead to the implementation of services and applications. The challenge is that these technologies are not necessarily compatible and designed to work with other technologies. Within this context, the main objective of this thesis is to design a heterogeneous framework that will permit the interaction of diverse devices such as RFID, sensors and actuators in order to provide new applications and services. For this purpose in this work, our first contribution is the design and analysis of an integration architecture for heterogeneous devices. In the second contribution, we propose an evaluation model for RFID topologies and an optimization tool that assists in the RFID network planning process. Finally, in our last contribution, we implemented a simplified version of the framework by using embedded hardware and performance metrics are provided as well as the detailed configuration of the test platform
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Razafimandimby, Anjalalaina Jean Cristanel. "Toward internet of heterogeneous things : wireless communication maintenance and efficient data sharing among devices." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10074/document.
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Malgré le grand succès de l'Internet des Objets, la plupart de ses applications sont basées uniquement sur l'actionnement statique. Cependant, l'ajout d'un rôle actif pour les actionneurs sera nécessaire afin d'optimiser les systèmes où ils sont présents. Pour ce faire, dans cette thèse, nous introduisons un nouveau concept appelé Internet des Objets Hétérogènes qui prend en compte les actionnements statique et dynamique. L'actionnement dynamique est fourni par un robot mobile ou un capteur mobile. Dans ce cas, nous exploitons le potentiel de la mobilité contrôlée en proposant des algorithmes efficaces pour maintenir la connectivité entre les dispositifs. Nous montrons par simulation l'efficacité des algorithmes proposés et leur performance en termes de temps de convergence, de connectivité et de distance parcourue. Une fois que la connectivité entre les dispositifs est garantie, un autre défi majeur qui devrait être résolu est l'énorme quantité de données qu'ils génèrent. Pour faire face à ce problème, nous proposons une approche d'inférence bayésienne qui permet d'éviter la transmission des données fortement corrélées. L'algorithme de propagation de croyance, couplé au modèle de champ aléatoire de Markov, est utilisé dans ce cas pour inférer les données manquantes. Selon différents scénarios, notre approche est évaluée sur la base des données réelles recueillies à partir des capteurs déployés sur des environnements intérieurs et extérieurs. Les résultats montrent que notre approche réduit considérablement la quantité de données transmises et la consommation d'énergie, tout en maintenant un niveau acceptable d'erreur d'inférence et de qualité de l'informationDespite of the large success of IOT, most of its applications are based only on static actuation. However, adding an active role for actuators will be needed, in order to optimize the systems where they are present. To achieve this goal, in this thesis, we introduce a new concept called Internet of Heterogeneous Things which takes into account both static and dynamic actuation. The dynamic actuation is provided by a mobile robot or a mobile sensor. In this case, we exploit the potential of controlled mobility by proposing efficient algorithms to maintain the global connectivity among devices. We show by simulation the efficiency of the proposed algorithms and their performance in terms of convergence time, connectivity, and traveled distance. Once the connectivity among devices is guaranteed, another major challenge that should be solved is the huge amount of data they generate and transmit. To tackle this problem, we propose a Bayesian Inference Approach which allows avoiding the transmission of high correlated data. Belief Propagation algorithm, coupled with the Markov Random Field model, is used in this case to reconstruct the missing sensing data. According to different scenarios, our approach is evaluated based on the real data collected from sensors deployed on indoor and outdoor environments. The results show that our proposed approach reduces drastically the number of transmitted data and the energy consumption, while maintaining an acceptable level of inference error and information quality
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Kandi, Mohamed Ali. "Lightweight key management solutions for heterogeneous IoT." Thesis, Compiègne, 2020. http://www.theses.fr/2020COMP2575.
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L'Internet des objets (IdO) est une technologie émergente ayant le potentiel d'améliorer notre quotidien de différentes façons. Elle consiste à étendre la connectivité au-delà des appareils standards (tels que les ordinateurs, les tablettes et les smartphones) à tous les objets du quotidien. Ces appareils, également appelés objets intelligents, peuvent alors collecter des données de leur entourage, collaborer pour les traiter puis agir sur leur environnement. Cela augmente leurs fonctionnalités et leur permet d'offrir divers services au profit de la société. Cela dit, de nombreux défis ralentissent le développement de l'IdO. La sécurisation des communications entre ces appareils est l'un des problèmes les plus difficiles qui empêche cette technologie de révéler tout son potentiel. La cryptographie fournit un ensemble de mécanismes permettant de sécuriser les données. Pour leur bon fonctionnement, ces derniers ont besoin de paramètres secrets appelés clés. La gestion des clés est une branche de la cryptographie qui englobe toutes les opérations impliquant la manipulation de ces clés : génération, stockage, distribution et remplacement. Par ailleurs, la cryptographie légère consiste à étendre les mécanismes conventionnels (la gestion des clés comprise) aux appareils à ressources limitées. Afin d'être efficaces dans l'IdO, les nouveaux mécanismes doivent offrir un bon compromis entre sécurité, performance et consommation de ressources. La gestion légère des clés est donc l'essence de la communication sécurisée dans l'IdO et le cœur de notre travail. Dans cette thèse, nous proposons un nouveau protocole léger de gestion des clés pour sécuriser la communication entre les appareils hétérogènes et dynamiques de l'IdO. Pour concevoir notre solution, nous considérons trois modes de communication : d'appareil à appareil, de groupe et de multi-groupes. Alors que la plupart des travaux connexes se concentrent uniquement sur l'un de ces modes de communication, notre solution sécurise efficacement les trois. Aussi, elle équilibre automatiquement les charges entre les appareils hétérogènes en fonction de leurs capacités. Nous prouvons alors que cela rend notre protocole plus adapté à l'IdO étant donné qu'il est efficace et hautement évolutif. De plus, nous proposons une décentralisation de notre protocole basée sur la technologie blockchain et les contrats intelligents. Ainsi, nous montrons qu'en permettant à plusieurs participants de gérer les clés cryptographiques, la décentralisation résout les problèmes de confiance, réduit le risque de défaillance du système et améliorer la sécurité. Nous implémentons enfin notre solution sur des plateformes IoT à ressources limitées qui sont basées sur le système d'exploitation Contiki. L'objectif est d'évaluer expérimentalement les performances de notre solution et de compléter nos analyses théoriquesThe Internet of Things (IoT) is an emerging technology that has the potential to improveour daily lives in a number of ways. It consists of extending connectivity beyond standard devices (such as computers, tablets and smartphones) to all everyday objects. The IoT devices, also called smart objects, can collect data from their surroundings, collaborate to process them and then act on their environment. This increases their functionalities and allow them to offer various services for the benefit of society. However, many challenges are slowing down the development of the IoT. Securing communication between its devices is one of the hardest issue that prevents this technology from revealing its full potential. Cryptography provides a set of mechanisms to secure data. For their proper functioning, these mechanisms require secret parameters called keys. The Key Management is a branch of cryptography that encompasses all operations involving the handling of these of extending the conventional mechanisms (including the Key Management) to the resource-limited devices. To be efficient in the IoT, the new mechanisms must offer a good compromise between security, performance and resource requirements. Lightweight Key Management is the essence of secure communication in the IoT and the core of our work. In this thesis, we propose a novel lightweight Key Management protocol to secure communication between the heterogeneous and dynamic IoT devices. To design our solution, we consider three modes of communication: device-to-device, group and multi-group communication. While most of the related works focus only on one of these modes of communication, our solution efficiently secures all three of them. It also automatically balances the loads between the heterogeneous devices according to their capabilities. We then prove that this makes our protocol more suitable for the IoT as it is e_cient and highly scalable. Furthermore, we propose a decentralization of our protocol based on the blockchain technology and smart contracts. We show that, by empowering multiple participants to manage the cryptographic keys, decentralization solves trust issues, lowers risk of system failure and improves security. We finally implement our solution on resource-constrained IoT motes that are based on the Contiki operating system. The objective is to experimentally evaluate the performance of our solution and to complete our theoretical analyses
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Adhatarao, Sripriya Srikant [Verfasser]. "PHOENIX: A Premise to Reinforce Heterogeneous and Evolving Internet Architectures with Exemplary Applications / Sripriya Srikant Adhatarao." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1222738279/34.
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Racaru, Stelian Florin. "Conception et validation d'une architecture de signalisation pour la garantie de qualité de service dans l'Internet multi-domaine, multi-technologie et multi-service." Toulouse, INSA, 2008. http://eprint.insa-toulouse.fr/archive/00000236/.
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Depuis quelques années, les évolutions technologiques conjointes de l’informatique et des télécommunications ont conduit à une modification substantielle des communications et des réseaux. Une des conséquences de ces progrès est la convergence vers une infrastructure unique de transfert de données. Porté par son développement continu, l’Internet (IP) se révèle comme solution pour l’interconnexion des différentes technologies hétérogènes, petite ou grande distance, fixe ou mobiles, l’infrastructure globale pour tout type de communication. De ce contexte résulte la problématique générale de nos travaux qui est de définir et de mettre en oeuvre des nouveaux mécanismes, protocoles et architectures pour répondre aux besoins des applications émergentes. Nos contributions s’inscrivent dans ce thème de la maîtrise de la garantie de la Qualité de Service (QoS) de bout en bout dans un environnement Internet hétérogène à plusieurs niveaux : multi domaine, multi technologie et multi service. Nous adressons le besoin des nouvelles architectures en signalisation inter domaine couplée au provisionnement et au contrôle d’admission pour répondre aux besoins du trafic et des services actuels. Dans ce cadre, nous avons participé à la conception, l'implémentation, le déploiement et la validation de l'architecture du projet européen IST EuQoS (« End-to-end Quality of Service support over heterogeneous networks »)During the last years, computer science and telecommunications joint technological evolutions led to a perspective change in the area of communications and networks. One of the consequences of this progress is the convergence towards a sole infrastructure for data exchange. Due to its continuous development, Internet (IP) appears as the solution for interconnecting different heterogeneous technologies, short or long distance, fixe or mobile, the global infrastructure for communication transport. Internet supports many new types of applications: dynamic, multimedia, real time, distributed, potentially multi-user, mobile, such as voice over IP (VoIP), video on demand (VoD), visio conference, interactive games, etc. The general concerns addressed by our work result from this context. Our objective is to define and implement new mechanisms, protocols and architectures to answer the needs of emergent applications. Our proposals contribute to mastering the end-toend Quality of Service (QoS) in a multi-level heterogeneous environment, by addressing the current need of inter-domain signalling coupled with provisioning and admission control, to meet the traffic requirements. In this context, we participated in the design, development, deployment and validation of the architecture defined within the European project IST EuQoS (“End-to-end Quality of Service support over heterogeneous networks”)
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Wong, Chong Wan. "Using dynamically-generated account to integrate heterogeneous B2C e-payment systems." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2148240.
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Araújo, Moreira Nicolas de. "On heterogeneous networks under non-Gaussian interferences : experimental and theoretical aspects." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1I041/document.
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L’Internet des Objets représente un défi technique pour la communication 5G à cause de son hétérogénéité caractéristique : la bande 2.4 GHz ISM, par exemple, est partagée entre différents types de technologies, comme Wifi, Bluetooth et Zigbee. En plus de la perte de qualité de communication, des études récentes montrent que l’interférence augmente de façon significative la consommation d’énergie. Donc, traiter l’interférence devient une tâche importante pour assurer la réussite de la transmission de données. Cette thèse approche deux aspects différents des réseaux hétérogènes. La première partie présente une étude expérimentale sur la nature de l’interférence entre dispositifs IEEE 802.11 et 802.15.4, ses impacts dans la fiabilité de la communication et propose une description statistique. La conclusion principale est que, dans ce contexte, l’interférence présente un comportement non-Gaussien, plus précisément, impulsif. Des travaux théoriques récents alliés avec ces résultats expérimentaux montrent que la distribution α-stable est plus convenable pour représenter bruits impulsives. Cela signifie que, une fois optimal, les architectures de communication classiques basé sur assomption Gaussienne, particulièrement la méthode des moindres carrés et le récepteur linéaire, ne sont plus optimales et présentent une perte de performance significative. La deuxième partie présente une architecture MIMO basé sur codage Alamouti, estimation de canal supervisée basé sur méthode Least Absolute Deviation et récepteur p-norme avec une estimation de p. L’architecture proposée présente une performance supérieure au méthode classiqueInternet of Things represents a technical challenge for 5G communications due to is characteristic heterogeneity: the 2.4 GHz ISM band, for example, is shared between different kind of technologies, such Wifi, Bluetooth and Zigbee. In addition to the loss of quality of communication, recent studies show that interference increases significantly the energy consumption. So, dealing with interference becomes an important task to ensure successfull data transmission. The present thesis approaches two aspects of heterogeneous networks. The first part presents an experimental study on the nature of interference between IEEE 802.11 and IEEE 802.15.4 devices, its impacts on the communication reliability and proposes an statistical description of it. The main conclusion of this part is that, on this context, the interference may present a non-Gaussian behavior, more precisely, an impulsive behavior. Recent theoretical works allied with these experimental results show that the α-stable distribution is more adequate to represent impulsive noises. It means that the, once optimal, classical communication architectures based on the Gaussian assumption, particularly the Least Squares based channel estimation and linear receiver, are not optimal anymore present a significant loss of performance. The second part presents a robust MIMO architecutre based on Alamouti coding, supervised channel estimation based on Least Absolute Deviation and p-norm receiver with an estimator for p. The proposed approach outperforms the classical method
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Martínez, Anny. "An ontology-based approach toward the configuration of heterogeneous network devices." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/299803.
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Despite the numerous efforts of standardization, semantic issues remain in effect in many subfields of networking. The inability to exchange data unambiguously between information systems and human resources is an issue that hinders technology implementation, semantic interoperability, service deployment, network management, technology migration, among many others. In this thesis, we will approach the semantic issues in two critical subfields of networking, namely, network configuration management and network addressing architectures. The fact that makes the study in these areas rather appealing is that in both scenarios semantic issues have been around from the very early days of networking. However, as networks continue to grow in size and complexity current practices are becoming neither scalable nor practical.
One of the most complex and essential tasks in network management is the configuration of network devices. The lack of comprehensive and standard means for modifying and controlling the configuration of network elements has led to the continuous and extended use of proprietary Command Line Interfaces (CLIs). Unfortunately, CLIs are generally both, device and vendor-specific. In the context of heterogeneous network infrastructures---i.e., networks typically composed of multiple devices from different vendors---the use of several CLIs raises serious Operation, Administration and Management (OAM) issues. Accordingly, network administrators are forced to gain specialized expertise and to continuously keep knowledge and skills up to date as new features, system upgrades or technologies appear. Overall, the utilization of proprietary mechanisms allows neither sharing knowledge consistently between vendors' domains nor reusing configurations to achieve full automation of network configuration tasks---which are typically required in autonomic management. Due to this heterogeneity, CLIs typically provide a help feature which is in turn an useful source of knowledge to enable semantic interpretation of a vendor's configuration space. The large amount of information a network administrator must learn and manage makes Information Extraction (IE) and other forms of natural language analysis of the Artificial Intelligence (AI) field key enablers for the network device configuration space. This thesis presents the design and implementation specification of the first Ontology-Based Information Extraction (OBIE) System from the CLI of network devices for the automation and abstraction of device configurations. Moreover, the so-called semantic overload of IP addresses---wherein addresses are both identifiers and locators of a node at the same time---is one of the main constraints over mobility of network hosts, multi-homing and scalability of the routing system. In light of this, numerous approaches have emerged in an effort to decouple the semantics of the network addressing scheme. In this thesis, we approach this issue from two perspectives, namely, a non-disruptive (i.e., evolutionary) solution to the current Internet and a clean-slate approach for Future Internet. In the first scenario, we analyze the Locator/Identifier Separation Protocol (LISP) as it is currently one of the strongest solutions to the semantic overload issue. However, its adoption is hindered by existing problems in the proposed mapping systems. Herein, we propose the LISP Redundancy Protocol (LRP) aimed to complement the LISP framework and strengthen feasibility of deployment, while at the same time, minimize mapping table size, latency time and maximize reachability in the network. In the second scenario, we explore TARIFA a Next Generation Internet architecture and introduce a novel service-centric addressing scheme which aims to overcome the issues related to routing and semantic overload of IP addresses.A pesar de los numerosos esfuerzos de estandarización, los problemas de semántica continúan en efecto en muchas subáreas de networking. La inabilidad de intercambiar data sin ambiguedad entre sistemas es un problema que limita la interoperabilidad semántica. En esta tesis, abordamos los problemas de semántica en dos áreas: (i) la gestión de configuración y (ii) arquitecturas de direccionamiento. El hecho que hace el estudio en estas áreas de interés, es que los problemas de semántica datan desde los inicios del Internet. Sin embargo, mientras las redes continúan creciendo en tamaño y complejidad, los mecanismos desplegados dejan de ser escalabales y prácticos. Una de las tareas más complejas y esenciales en la gestión de redes es la configuración de equipos. La falta de mecanismos estándar para la modificación y control de la configuración de equipos ha llevado al uso continuado y extendido de interfaces por líneas de comando (CLI). Desafortunadamente, las CLIs son generalmente, específicos por fabricante y dispositivo. En el contexto de redes heterogéneas--es decir, redes típicamente compuestas por múltiples dispositivos de distintos fabricantes--el uso de varias CLIs trae consigo serios problemas de operación, administración y gestión. En consecuencia, los administradores de red se ven forzados a adquirir experiencia en el manejo específico de múltiples tecnologías y además, a mantenerse continuamente actualizados en la medida en que nuevas funcionalidades o tecnologías emergen, o bien con actualizaciones de sistemas operativos. En general, la utilización de mecanismos propietarios no permite compartir conocimientos de forma consistente a lo largo de plataformas heterogéneas, ni reutilizar configuraciones con el objetivo de alcanzar la completa automatización de tareas de configuración--que son típicamente requeridas en el área de gestión autonómica. Debido a esta heterogeneidad, las CLIs suelen proporcionar una función de ayuda que fundamentalmente aporta información para la interpretación semántica del entorno de configuración de un fabricante. La gran cantidad de información que un administrador debe aprender y manejar, hace de la extracción de información y otras formas de análisis de lenguaje natural del campo de Inteligencia Artificial, potenciales herramientas para la configuración de equipos en entornos heterogéneos. Esta tesis presenta el diseño y especificaciones de implementación del primer sistema de extracción de información basada en ontologías desde el CLI de dispositivos de red, para la automatización y abstracción de configuraciones. Por otra parte, la denominada sobrecarga semántica de direcciones IP--en donde, las direcciones son identificadores y localizadores al mismo tiempo--es una de las principales limitaciones sobre mobilidad, multi-homing y escalabilidad del sistema de enrutamiento. Por esta razón, numerosas propuestas han emergido en un esfuerzo por desacoplar la semántica del esquema de direccionamiento de las redes actuales. En esta tesis, abordamos este problema desde dos perspectivas, la primera de ellas una aproximación no-disruptiva (es decir, evolucionaria) al problema del Internet actual y la segunda, una nueva propuesta en torno a futuras arquitecturas del Internet. En el primer escenario, analizamos el protocolo LISP (del inglés, Locator/Identifier Separation Protocol) ya que es en efecto, una de las soluciones con mayor potencial para la resolucion del problema de semántica. Sin embargo, su adopción está limitada por problemas en los sistemas de mapeo propuestos. En esta tesis, proponemos LRP (del inglés, LISP Redundancy Protocol) un protocolo destinado a complementar LISP e incrementar la factibilidad de despliegue, a la vez que, reduce el tamaño de las tablas de mapeo, tiempo de latencia y maximiza accesibilidad. En el segundo escenario, exploramos TARIFA una arquitectura de red de nueva generación e introducimos un novedoso esquema de direccionamiento orientado a servicios.
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Rückelt, Tobias [Verfasser], Ralf [Akademischer Betreuer] Steinmetz, and Ioannis [Akademischer Betreuer] Stavrakakis. "Connecting Vehicles to the Internet - Strategic Data Transmission for Mobile Nodes using Heterogeneous Wireless Networks / Tobias Rückelt ; Ralf Steinmetz, Ioannis Stavrakakis." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2017. http://d-nb.info/1147968365/34.
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Rahman, Hasibur. "Distributed Intelligence-Assisted Autonomic Context-Information Management : A context-based approach to handling vast amounts of heterogeneous IoT data." Doctoral thesis, Stockholms universitet, Institutionen för data- och systemvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-149513.
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As an implication of rapid growth in Internet-of-Things (IoT) data, current focus has shifted towards utilizing and analysing the data in order to make sense of the data. The aim of which is to make instantaneous, automated, and informed decisions that will drive the future IoT. This corresponds to extracting and applying knowledge from IoT data which brings both a substantial challenge and high value. Context plays an important role in reaping value from data, and is capable of countering the IoT data challenges. The management of heterogeneous contextualized data is infeasible and insufficient with the existing solutions which mandates new solutions. Research until now has mostly concentrated on providing cloud-based IoT solutions; among other issues, this promotes real-time and faster decision-making issues. In view of this, this dissertation undertakes a study of a context-based approach entitled Distributed intelligence-assisted Autonomic Context Information Management (DACIM), the purpose of which is to efficiently (i) utilize and (ii) analyse IoT data. To address the challenges and solutions with respect to enabling DACIM, the dissertation starts with proposing a logical-clustering approach for proper IoT data utilization. The environment that the number of Things immerse changes rapidly and becomes dynamic. To this end, self-organization has been supported by proposing self-* algorithms that resulted in 10 organized Things per second and high accuracy rate for Things joining. IoT contextualized data further requires scalable dissemination which has been addressed by a Publish/Subscribe model, and it has been shown that high publication rate and faster subscription matching are realisable. The dissertation ends with the proposal of a new approach which assists distribution of intelligence with regard to analysing context information to alleviate intelligence of things. The approach allows to bring few of the application of knowledge from the cloud to the edge; where edge based solution has been facilitated with intelligence that enables faster responses and reduced dependency on the rules by leveraging artificial intelligence techniques. To infer knowledge for different IoT applications closer to the Things, a multi-modal reasoner has been proposed which demonstrates faster response. The evaluations of the designed and developed DACIM gives promising results, which are distributed over seven publications; from this, it can be concluded that it is feasible to realize a distributed intelligence-assisted context-based approach that contribute towards autonomic context information management in the ever-expanding IoT realm.At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 7: Submitted.
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Venkatsubramanyan, Shailaja. "Discovering distributed and heterogeneous resources on the Internet: A theoretical foundation for an ontology-driven intelligent agent model. Its design, implementation and validation." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284913.
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The Internet has made it possible for large amounts of data to be made available to users in a variety of areas. This has to lead to users being inundated with lots of information, making it difficult for them to locate data that would be of use to them. One domain that has not been immune to this problem is that of remote sensing. Remotely sensed data is available in abundance and can potentially be of use to many users. But it is difficult for users from different application domains to locate appropriate datasets and process them. Current search tools such as search engines are not adequate for remotely sensed data as most searches using these tools yield an inordinately large number of web sites, each of which has to be explored individually by the user and then the results manually collated. Besides, traditional search techniques are not embedded with the knowledge about the remote sensing domain. The goal of this research is to find out how users with varying backgrounds and levels of expertise can retrieve and access resources over the Internet. This dissertation describes a virtual enterprise model of intelligent agents that deals with the complexities of locating and retrieving remotely sensed data over the Internet. The methodology followed in this research includes (i) agent modeling, (ii) building agent cooperation techniques that would enable agents to understand terminology used at different sites and communicate with each other, (iii) optimizing communication flows between various agents, (iv) validating the model, and (v) verifying the prototype. The important contributions of this research include among others an agent model generalizable to problem domains other than remote sensing, a formally defined ontology (a collection of terms and relationships between those terms) for the remote sensing domain, and a prototype system that implements the model and the ontology.
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Xiao, Bin. "Data-Centric Network of Things : A Method for Exploiting the Massive Amount of Heterogeneous Data of Internet of Things in Support of Services." Doctoral thesis, Stockholms universitet, Institutionen för data- och systemvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-142342.
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Internet of things (IoT) generates massive amount of heterogeneous data, which should be efficiently utilized to support services in different domains. Specifically, data need to be supplied to services by understanding the needs of services and by understanding the environment changes, so that necessary data can be provided efficiently but without overfeeding. However, it is still very difficult for IoT to fulfill such data supply with only the existing supports of communication, network, and infrastructure; while the most essential issues are still unaddressed, namely the heterogeneity issue, the recourse coordination issue, and the environments’ dynamicity issue. Thus, this necessitates to specifically study on those issues and to propose a method to utilize the massive amount of heterogeneous data to support services in different domains. This dissertation presents a novel method, called the data-centric network of things (DNT), which handles heterogeneity, coordinates resources, and understands the changing IoT entity relations in dynamic environments to supply data in support of services. As results, various services based on IoT (e.g., smart cities, smart transport, smart healthcare, smart homes, etc.) are supported by receiving enough necessary data without overfeeding. The contributions of the DNT to IoT and big data research are: firstly the DNT enables IoT to perceive data, resources, and the relations among IoT entities in dynamic environments. This perceptibility enhances IoT to handle the heterogeneity in different levels. Secondly, the DNT coordinates IoT edge resources to process and disseminate data based on the perceived results. This releases the big data pressure caused by centralized analytics to certain degrees. Thirdly, the DNT manages entity relations for data supply by handling the environment dynamicity. Finally, the DNT supply necessary data to satisfy different service needs, by avoiding either data-hungry or data-overfed status.
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Gurkas, Aydin Gulsum Zeynep. "IP mobility enhancements for heterogeneous wireless networks." Thesis, Evry, Institut national des télécommunications, 2014. http://www.theses.fr/2014TELE0006/document.
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Au cours des dernières décennies, le besoin pour des communications multimédia en mobilité est devenu indéniable dans les réseaux de type IP, ainsi la gestion de la mobilité et la continuité de session est depuis plusieurs années un problème de recherche très important aussi bien pour le milieu académique qu’industriel. Comme l'hétérogénéité des réseaux d’accès est en perpétuelle évolution, l'intégration des différents types de réseaux sans fil au niveau de la couche IP est devenue un domaine de recherche difficile et inévitable. L'un des problèmes les plus importants liés à l'exécution de la gestion de la mobilité concerne le fait que la couche d'application souffre de la modification d'adresses IP au cours du mouvement du nœud mobile alors que celle-ci construit sa session sur la base de l’adresse IP de connexion au réseau. Une nouvelle approche d'amélioration de la prise en charge de la mobilité propose de séparer l'identification de session et l'identification de l’emplacement ou l’attachement au réseau. Donc, par la séparation de ces deux concepts, les sessions ne sont pas identifiés par les adresses IP qui elles sont dynamiques puisque la mobilité dans le réseau impose le changement d’adresse IP, mais les nouveaux identificateurs uniques qui définissent un nœud et qui ne change pas à cause de la mobilité ce qui offrirait une stabilité pour le niveau applicatif. Selon ces concepts, Host Identity Protocol (HIP) est l'une des solutions dominantes en recherches qui est proposé par l'IETF et l’IRTF. Dans cette thèse, le protocole HIP est principalement examiné et de nouvelles améliorations de la mobilité sur la base de ce protocole ont été conçues et mises en placeOver the last decades, with rapid and tremendous growth of IP networks in mobile and wireless environments, mobility management and session continuity has become a more important issue. As the heterogeneity increases in network environments and gradual spread of Internet of Things wave, the integration of different types of wireless networks in the IP layer became a challenging and inevitable research area. One of the most important issues related to mobility management is related to the fact that the application layer suffers from the changing of IP addresses during the movement of the mobile node. It is expected the network layer and above layers to be aware of movement of mobile nodes. New wave in the improvement ideas on this concept is separating the session identification and the location identification. This avoids the applications to suffer when the IP address changes during the mobility. This new approach needs to introduce a new layer in the TCP/IP protocol stack, on top of the IP layer that will handle the new identifiers correspondent with the current IP address or new complete architecture designs which are inheriting locator/identifier separation idea. According to these concepts, Host Identity Protocol (HIP) is one of the dominant and prominent researches that is proposed by IETF and IRTF. This protocol proposes to solve the locator/identifier split problem by also including the security support. In this thesis, predominantly HIP protocol is examined and new mobility enhancements based on this protocol have been designed and introduced
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Petrolo, Riccardo. "Semantic-based discovery and integration of heterogeneous things in a Smart City environment." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10093/document.
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Une ville intelligente peut être considérée comme un système complexe dans lequel les différents acteurs coopèrent afin d’améliorer la zone urbaine, la rendant plus efficace et plus durable. Pour atteindre cet objectif, les technologies de l’information et de la communication et, en particulier l’Internet des Objets, sont appelées à jouer un rôle clé pour la mise en œuvre des solutions innovantes, des services et des applications. Cependant, en regardant l’état actuel de la ville intelligente, la réalisation d’un tel concept est encore loin d’être atteinte; le scénario réel est en effet caractérisé par un niveau élevé de fragmentation en raison de la pléthore de technologies et de dispositifs présents dans une ville. Afin de combler cette lacune, dans cette thèse, l’évolution de l’Internet des objets vers le Cloud of Things (CoT) est démontrée. Pour démontrer ce concept, le système d’exploitation VITAL est introduit. Dans le CoT, et en général dans le contexte Smart City, l’un des défis les plus importants est la découverte de données-sources appropriées aux besoins des utilisateurs. Cette découverte est une opération qui peut être exécutée directement in-network et / ou out-network. Dans cette thèse, les deux processus sont discutés en introduisant deux solutions différentes. En ce qui concerne la découverte in-network, la conception d’une passerelle pour le Cloud of Things est introduite. Cette passerelle est capable de découvrir et de gérer différents objets sur une base sémantique et, d’autre part, d’agir comme point final pour la présentation des données aux utilisateurs, combinant ainsi tous les aspects de cette thèseA Smart City can be seen as a complex system in which different actors cooperate in order to improve, the urban area, making it efficient and sustainable. To achieve this goal, the Information and Communication Technologies, and especially the prominent Internet of Things, are called to play a key role for implementing innovative solutions, services, and applications. However, looking at the current status, the realization of the Smart City is still far from being realized; the real scenario is indeed characterized with a high level of fragmentation due to the plethora of technologies and devices present in a city. In order to bridge this gap, in this thesis, the evolution of the Internet of Things towards the Cloud of Things (CoT) is demonstrated. To demonstrate this concept, the VITAL operating system is introduced. Within the CoT, and in general in the Smart City context, one of the most important challenges is the discovery of appropriate data-sources that satisfy user requirements. The discovery is an operation that can be performed directly in-network and/or out-network. In this thesis, both processes are discussed by introducing two different solutions. Going deeply towards an horizontal unification of different data-sources and the need to have processing capabilities closer to the network, in the last part of the dissertation, the design of a gateway for the Cloud of Things is introduced. This gateway is capable to discover and manage different semantic-like things and, on the other hand, to act as end-point for the presentation of data to users, bridging the contributions of this thesis
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Wong, Walter. "Proposta de implementação de uma arquitetura para a Internet de nova geração." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259643.
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Orientadores: Mauricio Ferreira Magalhães, Fabio Luciano VerdiDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e Computação
Made available in DSpace on 2018-08-09T14:41:11Z (GMT). No. of bitstreams: 1 Wong_Walter_M.pdf: 1265045 bytes, checksum: 15a2435e5676b973ffe726e4757323e4 (MD5) Previous issue date: 2007
Resumo: A concepção original da arquitetura da Internet foi baseada em uma rede fixa e confiável. Hoje em dia, a Internet se tornou dinâmica e vulnerável aos ataques de segurança. Também não era prevista a necessidade de integração de tecnologias heterogêneas nem de ambientes sem fio. A arquitetura atual apresenta uma série de barreiras técnicas para prover estes serviços, sendo uma das maiores a sobrecarga semântica do Internet Protocol (IP). O endereço IP atua como localizador na camada de rede e como identificador na camada de transporte, impossibilitando novas funcionalidades como a mobilidade e abrindo brechas de segurança. Este trabalho apresenta uma proposta de implementação de uma arquitetura para Internet de nova geração para o provisionamento de novos serviços de forma natural e integrada para a Internet atual. A proposta de arquitetura de implementação oferece suporte à mobilidade, ao multihoming, à segurança, à integração de redes heterogêneas e às aplicações legadas através da introdução de uma nova camada de identificação na arquitetura atual. Esta nova camada tem por objetivo separar a identidade da localização e se tornar uma opção de comunicação para as redes heterogêneas. Mecanismos adicionais foram propostos para prover o suporte às funcionalidades da arquitetura, tais como a resolução de nomes em identificadores, o roteamento baseado no identificador, a gerência de localização e um plano de controle para a troca de mensagens de sinalização fim-a-fim entre os componentes da arquitetura. Para a validação da arquitetura proposta, um protótipo foi implementado e vários testes de desempenho foram realizados para avaliação do overhead da implementação, do modelo de segurança, da robustez e do suporte à mobilidade e às aplicações legadas
Abstract: The original concept of the Internet architecture was based on static and reliable networks. Nowadays, the Internet became more dynamic and vulnerable to security attacks. The integration of heterogeneous technologies and wireless environment were not predicted. The current architecture presents some technical barriers to provide these services. One of these problems is the semantic overload of the Internet Protocol (IP). The IP address acts as locator in the network layer and identifier in the transport layer, preventing new features such as mobility and allowing security flaws. This work presents an implementation proposal of a next generation Internet architecture to provide new services naturally integrated to the Internet. The implementation proposal supports mobility, multihoming, security, heterogeneous networks integration and legacy applications by the introduction of a new identification layer in the current architecture. This new layer will separate the identity from the location and become an option for communication between heterogeneous networks. Additional mechanisms were proposed to support the new functionalities of the architecture, e.g., resolution of names to identifiers, identifier-based routing, location management and a control plane to exchange end-toend signalling control messages between the components of the architecture. In order to evaluate the proposed architecture, a prototype was implemented and some tests were performed considering implementation overhead, security model, robustness and support for mobility and legacy applications
Mestrado
Engenharia de Computação
Mestre em Engenharia Elétrica
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Lemercier, François. "Multiple interface management in smart grid networks." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2018. http://www.theses.fr/2018IMTA0100/document.
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Le réseau électrique a subi d’importantes évolutions ces dernières décennies, pour devenir ce qu’on appelle le Smart Grid. Le réseau électrique évolue actuellement d’une architecture centralisée vers une architecture décentralisée, tenant compte des consommations et sources d’énergies à caractère imprédictible et irrégulier. L’Advanced Metering Infrastructure est une architecture clé du Smart Grid qui permet des communications bidirectionnelles entre le consommateur et le fournisseur d’énergie. Les réseaux de compteurs intelligents qui constituent notamment cette architecture reposent communément sur des communications à courant porteur, une technologie qui est hautement sensible aux interférences. Malgré l’utilisation de protocoles de niveau 2 spécifiques, les technologies employées ne permettent pas de respecter les exigences de toutes les applications Smart grid. La plupart des technologies considérées pour les réseaux de compteurs intelligents sont de courte portée, chaque compteur ne peut communiquer directement avec le concentrateur. Les noeuds doivent collaborer entre eux, utilisant un protocole de routage tel que RPL pour atteindre la destination. Le but de cette thèse est d’adapter RPL à un environnement multi interfaces, et étudier comment l’hétérogénéité des interfaces peut améliorer la fiabilité et les performances d’un réseau de compteurs intelligentsSince decades, the power grid is Under going a tremendous evolution, toward what is called the Smart Grid. The grid is actually evolving from a centralized architecture to a decentralized one, taking into account all the unpredictable sources and consumption. The Advanced Metering Infrastructure is the network dedicated to the Smart Grid that allows two-ways communications between the consumers and the energy providers. Smart Meters networks, that are part of this architecture, rely on powerline communications, a technology that is highly sensitive to interference. Despite dedicated layer 2 protocols, the employed technologies cannot fulfill most of smart grid applications requirements. The majority of smart meter network technology candidates are short range, each meter cannot reach the concentrator in one hop. Nodes need to collaborate, using a routing protocol like RPL to reach the destination. The goal of this thesis is to modify RPL to a multi interfaces environment, and study how interface heterogeneity could increase the reliability and the performance of a smart meter network
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Gliozzi, Gherardo <1986>. "Sustainable processes using heterogeneous acid catalysts. Some examples of industrial interest." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6399/.
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In recent years the need for the design of more sustainable processes and the development of alternative reaction routes to reduce the environmental impact of the chemical industry has gained vital importance. Main objectives especially regard the use of renewable raw materials, the exploitation of alternative energy sources, the design of inherently safe processes and of integrated reaction/separation technologies (e.g. microreactors and membranes), the process intensification, the reduction of waste and the development of new catalytic pathways.
The present PhD thesis reports results derived during a three years research period at the School of Chemical Sciences of Alma Mater Studiorum-University of Bologna, Dept. of Industrial Chemistry and Materials (now Dept. of Industrial Chemistry “Toso Montanari”), under the supervision of Prof. Fabrizio Cavani (Catalytic Processes Development Group). Three research projects in the field of heterogeneous acid catalysis focused on potential industrial applications were carried out.
The main project, regarding the conversion of lignocellulosic materials to produce monosaccharides (important intermediates for production of biofuels and bioplatform molecules) was financed and carried out in collaboration with the Italian oil company eni S.p.A. (Istituto eni Donegani-Research Center for non-Conventional Energies, Novara, Italy)
The second and third academic projects dealt with the development of green chemical processes for fine chemicals manufacturing. In particular, (a) the condensation reaction between acetone and ammonia to give triacetoneamine (TAA), and (b) the Friedel-Crafts acylation of phenol with benzoic acid were investigated.
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Lelarge, Claire. "Les déterminants du comportement d'innovation des entreprises : facteurs internes et externes." Thesis, Paris 10, 2009. http://www.theses.fr/2009PA100021/document.
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Dans un contexte ou la nécessite d'innover est au cœur des préoccupations des entreprises et des pouvoirs publics, cette thèse contribue a la compréhension des déterminants des comportements d'innovation des entreprises et des conditions d'efficacité des interventions publiques en la matière. les quatre contributions proposées, essentiellement empiriques, montrent l’importance de considérer deux dimensions jusqu'ici souvent ignorées : l'organisation ou la structure des incitations internes, et l'heterogeneite entre entreprises, en particulier selon leur niveau technologique. le premier chapitre montre que les organisations centralisées ou décentralisées induisent des processus de gestion de l'information différents, qui les rendent plus ou moins favorables a l'innovation selon l’age de l’entreprise, son niveau technologique ou le degré d’heterogeneite de son environnement. le second chapitre montre que la concurrence des pays a bas couts est un déterminant significatif des réorganisations des portefeuilles de produits des entreprises industrielles ; mais que seules les plus productives y associent un véritable effort d'innovation. le troisième chapitre examine la nature des incitations conférées par le système des brevets en adoptant une approche structurelle. ils affectent l'intensité, mais aussi la direction des efforts d'innovation des entreprises, davantage incitées a innover en produits qu’en procédés. enfin, le dernier chapitre propose une analyse conjointe de deux dispositifs visant a promouvoir l'effort d'innovation des jeunes entreprises. nous mettons en évidence leur différentiel d’attractivite au sein de cette population d’entreprisesIn a context where both business and government consider innovation as crucial, this thesis aims at contributing to the debate on the determinants of firms' innovative behavior, and on the design of devices to be set up to support it. the four proposed contributions are primarily empirical and show the importance of considering two dimensions often ignored so far: first, organizational aspects, and the structure of internal incentives; second, firm heterogeneity, especially in terms of technological level. the first chapter shows that centralized and decentralized organizations rely on differentiated processes of information management, which make them more or less favorable to innovation depending on the firm’s age, technological level or on the magnitude of heterogeneity observed in its environment. the second chapter shows that competition arising from low cost countries is a significant determinant of reallocation in firms’ product portfolios, but that more productive firms only are able to introduce genuine product innovations. the third chapter adopts a structural approach to examine the incentives conferred by the patent system. patents affect the intensity, but also the direction of firms’ innovative efforts, since they convey incentives that are biased towards product innovation and against process innovations. the final chapter provides a joint analysis of two programs aiming at supporting the innovative effort of young businesses. we highlight their differential attractiveness within this population of firms
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Degli, Esposti Elisa <1983>. "The interaction of hydrocarbons with heterogeneous materials and catalysts: two examples of industrial interest." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3766/.
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Berjawi, Bilal. "Integration of heterogeneous data from multiple location-based services providers : A use case on tourist points of interest." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI072/document.
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Les fournisseurs de services géo-localisés (LBS) offrent des données textuelles et spatiales complémentaires, parfois incohérentes et imprécises, représentant les différents points d’intérêt (POI) sur un territoire donné. Ainsi, une même requête lancée auprès de divers fournisseurs de services touristiques peut donner des résultats différents et parfois incohérents, pour les attributs terminologiques et/ou les attributs spatiaux. De plus, chaque fournisseur utilise sa propre convention graphique pour représenter les POIs. L’intégration de ces données spatiales hétérogènes dans un contexte dynamique, large échelle, utilisant des sources incomplètes et de qualités variables est actuellement un verrou technologique. Dans ce travail de thèse, nous cherchons une solution à cette intégration aussi bien au niveau des données que de leur représentationLocation Based Services (LBS) had been involved to deliver relevant geospatial information based on a geographic position or address. The amount of geospatial data is constantly increasing, making it a valuable source of information for enriching LBS applications. However, these geospatial data are highly inconsistent and contradictory from one source to another. We assume that integrating geospatial data from several sources may improve the quality of information offered to users. In this thesis, we specifically focus on data representing Points of Interest (POIs) that tourists can get through LBS. Retrieving, matching and merging such geospatial entities lead to several challenges. We mainly focus on three main challenges including (i) detecting and merging corresponding entities across multiple sources and (ii) considering the uncertainty of integrated entities and their representation in LBS applications
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Faye, Mactar. "Structure interne et propriétés thermiques macroscopiques, application aux matériaux de construction." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30032/document.
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L'objectif de cette thèse est d'étudier l'impact de la structure interne des matériaux isotropes granulaires sur leurs propriétés thermiques macroscopiques. Nous avons développé un code de calcul pour résoudre les transferts thermiques au sein d'un matériau hétérogène tridimensionnel. Ce code est couplé avec un algorithme de génération de structures aléatoires. Après validation expérimentale, nous avons généré des géométries granulaires dont nous avons caractérisé la structure interne, puis nous avons étudié l'impact de cette structure sur la conductivité thermique. Nous avons également développé une nouvelle méthode de mesure expérimentale de la capacité thermique surfacique d'un élément de paroi à structure interne complexe. L'originalité de cette méthode est le couplage d'un modèle analytique de la capacité thermique, indépendant des propriétés thermiques des constituants, et d'une étude expérimentaleThe objective of this thesis is to study the impact of the internal structure of isotropic granular materials on the macroscopic thermal properties. We have developed a model to solve the heat transfer problem within a heterogeneous three-dimensional material. This code is coupled with an algorithm generating random structure. After an experimental validation, we first generated granular materials and we characterized their internal structure; then we studied the impact of this structure on the thermal conductivity. We also developed a new experimental method for measuring the heat capacity area of a wall element with complex internal structure. The originality of this method is the coupling of an analytical model of heat capacity area, which is independent of the thermal properties of the constituents, and an experimental study
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Cerasani, Umberto. "Modélisation et optimisation d'un émetteur-récepteur faible bruit pour implants cochléaires." Thesis, Nice, 2014. http://www.theses.fr/2014NICE4093/document.
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Les implants cochléaires permettent aux personnes atteintes de surdité profonde de percevoir des sons. La modélisation comportementale de la partie externe de l’implant a été réalisée avec le logiciel Matlab. L’étude du canal de transmission et sa modélisation utilisant des modèles électriques de tissus biologiques a été ensuite effectuée ainsi que l’étude du niveau de bruit introduit par le canal. Deux types de modulations différentes sont réalisés à l’émission chacune nécessitant un oscillateur. L’étude théorique et la création d’un nouveau modèle afin d’évaluer le bruit de phase ont été proposés. L’extraction du jitter à partir du bruit de phase et son impact sur la chaine de réception complète a été estimée. La compréhension précise et la modélisation des différentes parties de l’oreille humaine qui conduisent à la stimulation des terminaisons nerveuses sont décrites. Par la suite nous avons développé un nouveau modèle mécanique de l’organe de Corti et du déplacement des stéréociles, que nous avons validé à l’aide de données provenant d’expériences physiques. La modélisation mathématique de la synapse entre les cellules ciliées et les fibres nerveuses a été réalisée, afin d’obtenir le stimulus électrique relatif à un son perçu quelconque. De plus un nouveau modèle analogique décrivant la propagation de l’information nerveuse a été développé. En se basant sur la spectroscopie d’impédance électrochimique des tissus biologiques, nous avons créé un modèle électrique du fil d’électrodes inséré dans la cochléeCochlear implants are used by severely deaf people for partial hearing sensation. Behavioral modeling of the external part of the cochlear implant was first performed using the software Matlab. Then the propagation channel was modeled using electrical analogy of the biological tissues. Noise extraction of the propagation channel was performed in order to obtain the specifications for the RF receiver. Two types of diverse modulations are performed in the transmitter each one requiring an oscillator. The theoretical study and the creation of a new model allowing phase noise estimation is also proposed in this document. Jitter estimation from phase noise was performed and significantly impacted the overall chain transmission, suggesting oscillators blocks optimization. The accurate heterogeneous modeling of the various part of the internal ear leading to auditory nerve excitation was developed. Then a new mechanical equivalent of the organ of Corti and stereocilia displacement was developed and confirmed by physical experiments. The synapse between the hair cells and nerve fibers was mathematically modeled, in order to obtain the electrical stimulus of the auditory nerve associated with a random sound stimulus. Furthermore a new analog model of the nerve fiber information propagation was realized in order to obtain a realistic electrical analogy with nerve fiber depolarization propagation. Based on impedance spectroscopy biological tissue characterization, we proposed a new electrical analogy of the system composed of the electrodes inserted inside the cochlea
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Ahsan, AMM Nazmul. "Form and Functionality of Additively Manufactured Parts with Internal Structure." Diss., North Dakota State University, 2019. https://hdl.handle.net/10365/31532.
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The tool-less additive manufacturing (AM) or 3D printing processes (3DP) use incremental consolidation of feed-stock materials to construct part. The layer by layer AM processes can achieve spatial material distribution and desired microstructure pattern with high resolution. This unique characteristics of AM can bring custom-made form and tailored functionality within the same object. However, incorporating form and functionality has their own challenge in both design and manufacturing domain. This research focuses on designing manufacturable topology by marrying form and functionality in additively manufactured part using infill structure. To realize the goal, this thesis presents a systematic design framework that focuses on reducing the gap between design and manufacturing of complex architecture. The objective is to develop a design methodology of lattice infill and thin shell structure suitable for additive manufacturing processes. Particularly, custom algorithmic approaches have been developed to adapt the existing porous structural patterns for both interior and exterior of objects considering application specific functionality requirements. The object segmentation and shell perforation methodology proposed in this work ensures manufacturability of large scale thin shell or hollowed objects and incorporates tailored part functionality. Furthermore, a computational design framework developed for tissue scaffold structures incorporates the actual structural heterogeneity of natural bones obtained from their medical images to facilitate the tissue regeneration process. The manufacturability is considered in the design process and the performances are measured after their fabrication. Thus, the present thesis demonstrates how the form of porous structures can be adapted to mingle with functionality requirements of the application as well as fabrication constraints. Also, this work bridges the design framework (virtual) and the manufacturing platform (realization) through intelligent data management which facilitates smooth transition of information between the two ends.National Science Foundation #OIA-1355466
National Science Foundation-DMR- MRI #1625704
National Institute of Health - COBRE: CDTSPC; Grant # P20GM109024
US-DOT # 693JK31850009CAAP
Dept. of Commerce Research-ND, Award # 17-08-G-191
CSMS, NDEPSCoR
NDSU Grand Challenge and Development Foundation
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Decan, Matthew. "The Copper(I)-catalyzed Azide–Alkyne Cycloaddition: A Modular Approach to Synthesis and Single-Molecule Spectroscopy Investigation into Heterogeneous Catalysis." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31882.
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Click chemistry is a molecular synthesis strategy based on reliable, highly selective reactions with thermodynamic driving forces typically in excess of 20 kcal mol-1. The 1,3-dipolar cycloaddition of azides and alkynes developed by Rolf Huisgen saw dramatic rate acceleration using Cu(I) as a catalyst in 2002 reports by Barry Sharpless and Morten Meldal enabling its click chemistry eligibility. Since these seminal reports, the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) has become the quintessential click reaction finding diverse utility. The popularity of the CuAAC has naturally led to interest in new catalyst systems with improved efficiency, robustness, and reusability with particular focus on nanomaterial catalysts, a common trend across the field of catalysis. The high surface area of nanomaterials lends to their efficacy as colloidal and heterogeneous nanocatalysts, but the latter boasts the added benefit of easy separation and recyclability. With any heterogeneous catalyst, a common question arises as to whether the active catalyst species is truly heterogeneous or rather homogeneous through metal ion leaching. Differentiating these processes is critical, as the latter would result in reduced efficiency, higher cost, and inevitable environmental and heath side effects.
This thesis explores the CuAAC from an interdisciplary approach. First as a synthetic tool, applying CuAAC-formed triazoles as functional, modular building blocks in the synthesis of optical cation sensors by combining azide and alkyne modified components to create a series of sensors selective for different metal cations. Next, single-molecule spectroscopy techniques are employed to observe the CuNP-catalyzed CuAAC in real time. Combining bench-top techniques with single-molecule microscopy to monitor single-catalytically generated products proves to be an effective method to establish catalysis occurs directly at the surface of copper nanoparticles, ruling out catalysis by ions leached into solution. This methodology is extended to mapping the catalytic activity of a commercial heterogeneous catalyst by applying super-localization analysis of single-catalytic events. The approach detailed herein is a general one that can be applied to any catalytic system through the development of appropriate probes. This thesis demonstrates single-molecule microscopy as an accessible, effective, and unparalleled tool for exploring the catalytic activity of nanomaterials by monitoring single-catalytic events as they occur.
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Wallace, Mario De' nell. "Leveraging Internal Resources for Business Sustainability in Independent Quick-Service Restaurants." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/6869.
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Quick-service restaurant owners who fail to apply effective business strategies could risk business closure within the first 5 years of operations. The purpose of this multiple case study was to explore effective strategies that independent quick-service restaurant owners used to sustain business longer than the first 5 years. Resource-based theory was the conceptual framework for this study. Data were collected via semistructured interviews with 6 owners of independent quick-service restaurants in the southern region of the United States who sustained their businesses longer than the first 5 years, and from the review of business documents pertaining to sustainability. Data were also collected using business artifacts such as job descriptions, menus, websites, social media platforms, and business licenses, and analyzed using methodological triangulation. Member checking was used to help ensure reliability and validity of the interpretations. Six key themes emerged from the data: organization value, customer required excellence, financial perspective, human assets, physical operating materials, and technological prowess. The 6 themes aligned with the 5 types of internal resources established in the conceptual framework. The implications of this study for positive social change include the potential to support the welfare of the local citizens and owners of quick-service restaurants across the United States by providing strategies necessary to increase business survival rates, improve job sustainability, and encourage job creation.
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Maviel, Laurent. "Modélisation et simulation des réseaux sans fil hétérogènes et non-stationnaires : Application aux topologies de petites cellules." Phd thesis, INSA de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00942972.
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Les nouveaux services de télécommunication accessibles en mobilité entraînent une demande croissante de débit et amènent aux limites de capacités des réseaux actuels. Pour répondre à cette demande, les opérateurs cellulaires déploient de nouvelles technologies et densifient leurs réseaux en ajoutant des petites cellules, où les stations de base sont plus proches des utilisateurs. Compte tenu de la visibilité directe et de la faible hauteur des antennes, le canal de propagation des petites cellules est différent de celui des macro-cellules et les modèles stochastiques de canal existants ne sont plus adaptés. C'est dans ce contexte que se situe cette thèse, qui explore les problématiques de dynamique dans le canal de propagation et dans l'utilisation des ressources radio. Nous proposons dans une première partie de caractériser les dynamiques dans le canal de propagation de petite cellule en milieu extérieur. Cette caractérisation se base sur des prédictions déterministes, où une partie de l'environnement est généré de manière aléatoire afin de procéder à des études statistiques. Pour cela, nous mettons en place une plateforme de simulation, capable de générer des objets statiques, de les déplacer et de les prendre en compte dans des outils de prédiction de propagation adaptés aux petites cellules. Une phase de mesures de l'impact du trafic de véhicules sur la puissance du signal permet de valider les outils de propagation développés dans la plateforme. L'objectif de la deuxième partie de la thèse est d'évaluer l'impact de ces nouvelles topologies sur les performances des réseaux hétérogènes. Nous présentons un modèle hybride de propagation qui prend en compte les variations de signal dues au trafic de véhicules en combinant les approches déterministes et statistiques, pour avoir les avantages de résultats précis et d'un temps de calcul rapide. Ce modèle hybride est utilisé par la suite dans un processus de simulation de réseau cellulaire 3G LTE au niveau système, où nous évaluons l'impact du trafic de véhicules sur le débit maximal, la consommation d'énergie et le respect de la qualité de service.
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BRANCO, ISABELA S. L. "Estudo dos efeitos na dose devido à heterogeneidade em braquiterapia com fontes de I125." reponame:Repositório Institucional do IPEN, 2017. http://repositorio.ipen.br:8080/xmlui/handle/123456789/28045.
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A braquiterapia de baixas taxas de dose realizada com sementes de 125I tem sido amplamente usada por décadas em variados sítios anatômicos, com bons resultados clínicos. O advento de algoritmos para cálculo de dose baseados em modelos (MBDCAs) permitiu aprimorar oestudo de deposição da dose considerando heterogeneidades como diferentes tecidos, órgãos,aplicadores com composições diferentes da água, proporcionando a análise em geometriascomplexas. As simulações matemáticas realizadas através destes algoritmos possibilitam odesenvolvimento de modelos fisicamente mais acurados que estendem sua aplicabilidade àverificação de sistemas de planejamento em braquiterapia. Neste trabalho foram estudadasconfigurações de objetos simuladores confeccionados para medidas experimentais e simuladosatravés do código MCNP de Monte Carlo a fim de observar as diferenças ocasionadas pelaintrodução de heterogeneidades quando presentes fontes de 125I de baixa taxa de dose. Para estepropósito, distintas as vertentes do tema foram abordadas, entre elas o estudo da influênciaexercida pelos parâmetros de densidade e composição dos materiais tecido equivalentes. Osresultados obtidos demonstraram que, o efeito que a composição de cada um dos materiaisexerce sobre a deposição de dose é mais expressivo que o efeito de sua densidade. Em outroestudo, foi estabelecida uma relação para estimar, de maneira simples, a dose de atenuação detecidos heterogêneos a partir da aferição ou simulação da dose obtida num objeto simuladorconstituído por PMMA, metodologia que pode ser desenvolvida e implementada na rotina clínica.Para complementação das análises dos estudos dosimétricos com a presença deheterogeneidades, foi realizada a validação da geometria simulada da semente de 125I, onde sereproduziu a metodologia de cálculo dosimétrico presente no TG-43 da AAPM. Além disto, foirealizado o estudo teórico da dependência energética dos dosímetros termoluminescentes paraanalisar a variação de sua resposta conforme a energia. A metodologia desenvolvida para oestudo dos efeitos da heterogeneidade na deposição de dose é recomendada na avaliação desistemas de planejamento computadorizados que possuem algoritmos de cálculo de dosebaseados em modelos, quando utilizadas fontes de 125I com baixa taxa de dose, de forma acontribuir na incorporação de novas estimativas de doses com maior acurácia.
Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
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Tavares, Lucas Alves. "O envolvimento da proteína adaptadora 1 (AP-1) no mecanismo de regulação negativa do receptor CD4 por Nef de HIV-1." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/17/17136/tde-06012017-113215/.
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O Vírus da Imunodeficiência Humana (HIV) é o agente etiológico da Síndrome da Imunodeficiência Adquirida (AIDS). A AIDS é uma doença de distribuição mundial, e estima-se que existam atualmente pelo menos 36,9 milhões de pessoas infectadas com o vírus. Durante o seu ciclo replicativo, o HIV promove diversas alterações na fisiologia da célula hospedeira a fim de promover sua sobrevivência e potencializar a replicação. A rápida progressão da infecção pelo HIV-1 em humanos e em modelos animais está intimamente ligada à função da proteína acessória Nef. Dentre as diversas ações de Nef está a regulação negativa de proteínas importantes na resposta imunológica, como o receptor CD4. Sabe-se que esta ação resulta da indução da degradação de CD4 em lisossomos, mas os mecanismos moleculares envolvidos ainda são totalmente elucidados. Nef forma um complexo tripartite com a cauda citosólica de CD4 e a proteína adaptadora 2 (AP-2), em vesículas revestidas por clatrina nascentes, induzindo a internalização e degradação lisossomal de CD4. Pesquisas anteriores demonstraram que o direcionamento de CD4 aos lisossomos por Nef envolve a entrada do receptor na via dos corpos multivesiculares (MVBs), por um mecanismo atípico, pois, embora não necessite da ubiquitinação de carga, depende da ação de proteínas que compõem os ESCRTs (Endosomal Sorting Complexes Required for Transport) e da ação de Alix, uma proteína acessória da maquinaria ESCRT. Já foi reportado que Nef interage com subunidades dos complexos AP-1, AP-2, AP-3 e Nef não parece interagir com subunidades de AP-4 e AP-5. Entretanto, o papel da interação de Nef com AP-1 e AP-3 na regulação negativa de CD4 ainda não está totalmente elucidado. Ademais, AP-1, AP-2 e AP-3 são potencialmente heterogêneos devido à existência de isoformas múltiplas das subunidades codificadas por diferentes genes. Todavia, existem poucos estudos para demonstrar se as diferentes combinações de isoformas dos APs são formadas e se possuem propriedades funcionais distintas. O presente trabalho procurou identificar e caracterizar fatores celulares envolvidos na regulação do tráfego intracelular de proteínas no processo de regulação negativa de CD4 induzido por Nef. Mais especificamente, este estudo buscou caracterizar a participação do complexo AP-1 na modulação negativa de CD4 por Nef de HIV-1, através do estudo funcional das duas isoformas de ?-adaptina, subunidades de AP-1. Utilizando a técnica de Pull-down demonstramos que Nef é capaz de interagir com ?2. Além disso, nossos dados de Imunoblot indicaram que a proteína ?2-adaptina, e não ?1-adaptina, é necessária no processo de degradação lisossomal de CD4 por Nef e que esta participação é conservada para degradação de CD4 por Nef de diferentes cepas virais. Ademais, por citometria de fluxo, o silenciamento de ?2, e não de ?1, compromete a diminuição dos níveis de CD4 por Nef da membrana plasmática. A análise por imunofluorêsncia indireta também revelou que a diminuição dos níveis de ?2 impede a redistribuição de CD4 por Nef para regiões perinucleares, acarretando no acúmulo de CD4, retirados por Nef da membrana plasmática, em endossomos primários. A depleção de ?1A, outra subunidade de AP-1, acarretou na diminuição dos níveis celulares de ?2 e ?1, bem como, no comprometimento da eficiente degradação de CD4 por Nef. Além disso, foi possível observar que, ao perturbar a maquinaria ESCRT via super-expressão de HRS (uma subunidade do complexo ESCRT-0), ocorreu um acumulo de ?2 em endossomos dilatados contendo HRS-GFP, nos quais também detectou-se CD4 que foi internalizado por Nef. Em conjunto, os resultados indicam que ?2-adaptina é uma importante molécula para o direcionamento de CD4 por Nef para a via ESCRT/MVB, mostrando ser uma proteína relevante no sistema endo-lisossomal. Ademais, os resultados indicaram que as isoformas ?-adaptinas não só possuem funções distintas, mas também parecem compor complexos AP-1 com diferentes funções celulares, já que apenas a variante AP-1 contendo ?2, mas não ?1, participa da regulação negativa de CD4 por Nef. Estes estudos contribuem para o melhor entendimento dos mecanismos moleculares envolvidos na atividade de Nef, que poderão também ajudar na melhor compreensão da patogênese do HIV e da síndrome relacionada. Em adição, este trabalho contribui para o entendimento de processos fundamentais da regulação do tráfego de proteínas transmembrana no sistema endo-lisossomal.The Human Immunodeficiency Virus (HIV) is the etiologic agent of Acquired Immunodeficiency Syndrome (AIDS). AIDS is a disease which has a global distribution, and it is estimated that there are currently at least 36.9 million people infected with the virus. During the replication cycle, HIV promotes several changes in the physiology of the host cell to promote their survival and enhance replication. The fast progression of HIV-1 in humans and animal models is closely linked to the function of an accessory protein Nef. Among several actions of Nef, one is the most important is the down-regulation of proteins from the immune response, such as the CD4 receptor. It is known that this action causes CD4 degradation in lysosome, but the molecular mechanisms are still incompletely understood. Nef forms a tripartite complex with the cytosolic tail of the CD4 and adapter protein 2 (AP-2) in clathrin-coated vesicles, inducing CD4 internalization and lysosome degradation. Previous research has demonstrated that CD4 target to lysosomes by Nef involves targeting of this receptor to multivesicular bodies (MVBs) pathway by an atypical mechanism because, although not need charging ubiquitination, depends on the proteins from ESCRTs (Endosomal Sorting Complexes Required for Transport) machinery and the action of Alix, an accessory protein ESCRT machinery. It has been reported that Nef interacts with subunits of AP- 1, AP-2, AP-3 complexes and Nef does not appear to interact with AP-4 and AP-5 subunits. However, the role of Nef interaction with AP-1 or AP-3 in CD4 down-regulation is poorly understood. Furthermore, AP-1, AP-2 and AP-3 are potentially heterogeneous due to the existence of multiple subunits isoforms encoded by different genes. However, there are few studies to demonstrate if the different combinations of APs isoforms are form and if they have distinct functional properties. This study aim to identify and characterize cellular factors involved on CD4 down-modulation induced by Nef from HIV-1. More specifically, this study aimed to characterize the involvement of AP-1 complex in the down-regulation of CD4 by Nef HIV-1 through the functional study of the two isoforms of ?-adaptins, AP-1 subunits. By pull-down technique, we showed that Nef is able to interact with ?2. In addition, our data from immunoblots indicated that ?2- adaptin, not ?1-adaptin, is required in Nef-mediated targeting of CD4 to lysosomes and the ?2 participation in this process is conserved by Nef from different viral strains. Furthermore, by flow cytometry assay, ?2 depletion, but not ?1 depletion, compromises the reduction of surface CD4 levels induced by Nef. Immunofluorescence microscopy analysis also revealed that ?2 depletion impairs the redistribution of CD4 by Nef to juxtanuclear region, resulting in CD4 accumulation in primary endosomes. Knockdown of ?1A, another subunit of AP-1, resulted in decreased cellular levels of ?1 and ?2 and, compromising the efficient CD4 degradation by Nef. Moreover, upon artificially stabilizing ESCRT-I in early endosomes, via overexpression of HRS, internalized CD4 accumulates in enlarged HRS-GFP positive endosomes, where co-localize with ?2. Together, the results indicate that ?2-adaptin is a molecule that is essential for CD4 targeting by Nef to ESCRT/MVB pathway, being an important protein in the endo-lysosomal system. Furthermore, the results indicate that ?-adaptins isoforms not only have different functions, but also seem to compose AP-1 complex with distinct cell functions, and only the AP-1 variant comprising ?2, but not ?1, acts in the CD4 down-regulation induced by Nef. These studies contribute to a better understanding on the molecular mechanisms involved in Nef activities, which may also help to improve the understanding of the HIV pathogenesis and the related syndrome. In addition, this work contributes with the understanding of primordial process regulation on intracellular trafficking of transmembrane proteins.
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Wang, Wei-Chen, and 王威程. "Heterogeneous Environment Distributed Mechanism Research for Internet of Things." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/64457257893906209073.
Full textAbstract:
碩士國立宜蘭大學
資訊工程研究所碩士班
101
After entering the age of smart phone, people can use smart phone anywhere conveniently to get information fast and instantly through Internet. For the past few years, the cloud concept and our daily life have been linked more closely with the help of the research of Wireless Sensor Network and the popularization of Internet technology. In the recent years, the sea level raised because of the broken ozone layer, and the temperature dropped rapidly because of the isolated solar radiation, which caused by the volcanic dust from the erupted volcanoes. Such factors have led to the abnormal climate on the earth. Based on above information, we develop an application on remote monitoring agriculture environment. We put the wireless sensor device to collect the environment data in the farmland. Then those sensor devices will upload the data to cloud server. After the precise calculation and analysis, the cloud server would send the result about farmland environment information to users’ smart phone which with android operating system so that users can use application to get the first-hand information to help them make further action and decision. This paper proposes the architecture, which combines embedded wireless sensor network device with smart phone, on remote monitoring the environment of cropper using the feature of cloud computing – that can manipulate huge amount of data. This system is developed to solve the agricultural losses caused by the abnormal climate.
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Chang, Sheng-Kai, and 張勝凱. "Unequal-Protected Digital FountainTM for Video Streaming over Heterogeneous Internet." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/75038292250353475384.
Full textAbstract:
碩士國立清華大學
資訊工程學系
95
In this thesis, we proposed a channel coding mechanism for unequal important data protection, such as video streaming or layered videos, based on the concept of Luby-Transform (LT) code in digital fountain. An Unequal important data is that different parts in data have different importance, and needs being protected according to their importance in different parts. Under network environments where clients have heterogeneous bandwidth and computing power, video streaming services that provide coarse-to-fine video quality are required because the usage environments are diverse and changing dynamically. The contributions of this thesis are that we analyzed the coding graph of LT codes to conclude the factors of decoding probability and redesigned the coding graph to achieve the unequal protection requirement. As compared to LT codes, such as Reed-Solomon code, the proposed channel coding approach can better performance on PSNR of video streaming and layered video coding. Furthermore, the decoding complexity of the proposed mechanism is very low so that it can be applied on the real-time decoders, such as mobile phones, which only have limited computing power and request low delay requirement. The experiment results present that the proposed approach reaches about 3 db PSNR improvements on other LT codes on average. More significantly, the results demonstrate that the proposed approach also has better performance when it is applied on layered videos. Finally, we also proposed an novel encoder architecture for the proposed codes, and the architecture provides a flexibility and convenience to design or generate all kinds of LT-like codes.
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Lin, Yuan-Hsi, and 林原熙. "Mobile Voice over Internet Protocol under Integrated Heterogeneous Networks System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/44850686050442932198.
Full textAbstract:
碩士國立成功大學
工程科學系碩博士班
91
In this paper，we build up a proposal of heterogeneous network integration，as internet be the backbone network integrating four available heterogeneous networks : Internet、PSTN、GSM and WLAN. To use the characteristic of mobility on parts of heterogeneous networks，we make the communication equipment having seamless roaming ability. On our integrating networks architecture，we develop a application named Mobile Voice over Internet Protocol (MVoIP)，and use the mobility of integrating networks to overcome nowadays VoIP drawbacks，and make the user in our system when moving can still run the MVoIP application. In this paper，on one hand the description is emphasized on the design of system，its design issues，and the operation model，and the other hand we will still discuss the design issues of MVoIP application，its operation model and related problems. Our major contribution is to build up a new network integrating environment for the new application.
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Hsieh, Chia-Chun, and 謝嘉濬. "Design and Implementation of a Heterogeneous Gateway for Internet of Things." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/69588664925824477588.
Full textAbstract:
碩士淡江大學
資訊工程學系碩士班
100
In recent years, the Internet of Things (IoT) has attracted much attention. The world views the IoT as the potential business opportunities in high-tech industries and invests a lot of resources in research, development and promotion. The IoT is broadly utilized to improve the quality of human’s life and make it more convenient. However, there are some differences between the wireless communication technology (such as Bluetooth, ZigBee, Wi-Fi, infrared, etc.) used in common electronic device markets. As a result, the real-time information and device status cannot be integrated effectively which enhance the difficulty of the integration of Internet of Things in heterogeneous network. In this thesis, we intend to design a gateway using the Internet of Things, namely ‘Heterogeneous Gateway’, which can integrate various smart objects of the wireless communication technology. This gateway can solve the coexistence of heterogeneous network by conducting any smart objects to exchange real-time information and monitoring status in order to enhance the efficiency and quality of network transmission.
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Kao, Cheng-An, and 高承安. "Design and Implementation of Internet of things Gateway in heterogeneous network." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/19624869160614464973.
Full textAbstract:
碩士淡江大學
資訊工程學系碩士班
101
In recent years, the network communication and the micro electro mechanical embedded technologies have attracted much attention. Through these technologies, the capabilities of sensing, identification, and communication can be embedded in various physical devices which automatically connect to the Internet and form a big network called Internet of Things (IoT). However, the IoT devices are embedded with different wireless communication interfaces. The most popular interfaces are Wi-Fi and ZigBee. This thesis presents the design and implementation of an IoT Access Point which supports functionalities of coordination of WiFi and ZigBee standards. Based on the existing Wi-Fi Access Point, we have embedded a ZigBee module and implemented the ZigBee protocol such that the designed Access Point can support ZigBee communication capabilities. The designed IoT Access Point can connect to both Internet and home appliances and provide remote access, remote control, and other services for the home appliances. To handle the common interference existed between WiFi and ZigBee protocols, this thesis developed a dynamic channel selection scheme which selects the best channel for constructing ZigBee networks under the coordination of WiFi channel detection. Performance results reveal that the designed IoT Access Point could efficiently improve the link quality, packet error rate, and ZigBee response time.
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CHEN, CHAO-JUNG, and 陳昭榮. "An Internet of Things Application Architecture Based on Heterogeneous Wireless Network." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/qfu5xp.
Full textAbstract:
碩士華梵大學
電子工程學系碩士班
106
In this thesis we propose an IoT application architecture that is based on the integrated heterogeneous wireless network of WSN (Wireless Sensor Network) ,Wi-Fi and GPRS (General Packet Radio Service). Besides basic wireless sensors on detecting temperature and humidity, there are two types of CO2 sensors adopted to monitor the environment. The comparisons between those CO2 sensors in different specifications are studied to help components utilization. In constructing our network, ZigBee networks are deployed at sensor field to collect sensor data via short distance wireless transmissions among nodes in topology. In connecting to internet cloud, ZigBee network is then bridged to Wi-Fi or GPRS network to let the collected data forward to internet IoT-server that offers data storage and query. Users and application objects are then allowed to monitor sensor nodes by querying the IoT-server to get data. In applications, possible controls are replied to the sensor node when some criterions meet,. Therefore IoT relationship is established between sensor nodes and remote objects.
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"A study of the coexistence of heterogeneous flows on data networks." 2006. http://library.cuhk.edu.hk/record=b5892746.
Full textAbstract:
Tam Sai-Wah.Thesis (M.Phil.)--Chinese University of Hong Kong, 2006.
Includes bibliographical references (leaves [103]-104) and index.
Abstracts in English and Chinese.
Abstract --- p.x
摘要 --- p.xi
Abbreviations --- p.xii
Symbols --- p.xiv
Chapter Part I --- Background
Chapter 1 --- Background on coexistence --- p.2
Chapter 1.1 --- Data network --- p.2
Chapter 1.1.1 --- Telephone network vs. data network --- p.2
Chapter 1.1.2 --- Bandwidth in networks --- p.3
Chapter 1.2 --- Taxonomy of flows --- p.4
Chapter 1.3 --- Effect of heterogeneity and proposed solution --- p.4
Chapter 1.3.1 --- Cause and effect of heterogeneity --- p.4
Chapter 1.3.2 --- TCP-friendly congestion control as a solution --- p.5
Chapter 1.3.3 --- Distributed admission control as a solution --- p.6
Chapter 1.3.4 --- Evaluation methodology and organisation of this thesis --- p.6
Chapter 2 --- Model of Heterogeneous Flows --- p.8
Chapter 2.1 --- The network --- p.8
Chapter 2.2 --- Elastic flows --- p.8
Chapter 2.3 --- Inelastic flows --- p.10
Chapter 2.4 --- Stochastic Flows --- p.11
Chapter 2.5 --- Controls --- p.12
Chapter 2.5.1 --- Congestion control for elastic flows --- p.12
Chapter 2.5.2 --- No control for inelastic flows --- p.13
Chapter 2.5.3 --- Congestion control for inelastic flows --- p.14
Chapter 2.5.4 --- Admission control for inelastic flows --- p.15
Chapter 2.5.5 --- Admission control for inelastic flows with continuous assurance --- p.16
Chapter 2.6 --- Markov chain model of control schemes --- p.17
Chapter 2.6.1 --- Normalisation --- p.17
Chapter 2.6.2 --- Control schemes and Markov chains --- p.18
Chapter Part II --- Evaluation
Chapter 3 --- Stability of network under different controls --- p.29
Chapter 3.1 --- Stability of queues --- p.29
Chapter 3.2 --- Stability of the Markov chain models --- p.30
Chapter 3.2.1 --- Observation of stability from simulation --- p.30
Chapter 3.3 --- Informal discussion of stability --- p.33
Chapter 4 --- Bandwidth allocation --- p.35
Chapter 4.1 --- Aggregated bandwidth --- p.35
Chapter 4.2 --- Bandwidth per flow --- p.37
Chapter 5 --- Evaluation based on utility functions --- p.40
Chapter 5.1 --- Properties of utility function --- p.40
Chapter 5.1.1 --- Utility for elastic flows --- p.40
Chapter 5.1.2 --- Utility for inelastic flows --- p.41
Chapter 5.1.3 --- Utility throughput --- p.41
Chapter 5.1.4 --- Choice of utility function --- p.43
Chapter 5.2 --- Degree of elasticity --- p.45
Chapter 5.3 --- Homogeneous environment --- p.46
Chapter 5.4 --- Heterogeneous environment --- p.49
Chapter 5.4.1 --- Comparison for different offered load --- p.50
Chapter 5.4.2 --- Effect of scaling --- p.52
Chapter 5.4.3 --- Sensitivity to α and ε --- p.57
Chapter 6 --- Blocking probability --- p.62
Chapter 6.1 --- Formulating admission behaviour into PCDSDE --- p.62
Chapter 6.2 --- Evaluation of the blocking probability --- p.64
Chapter 6.3 --- Verification by simulation --- p.66
Chapter 6.3.1 --- Comparison for different offered load --- p.66
Chapter 6.3.2 --- Effect of scaling --- p.68
Chapter 6.3.3 --- Sensitivity to α and ε --- p.68
Chapter 7 --- Population --- p.74
Chapter 7.1 --- Mean number of inelastic flows --- p.74
Chapter 7.2 --- Mean number of elastic flows --- p.75
Chapter 7.2.1 --- Elastic population after scaling --- p.79
Chapter 7.2.2 --- Effect of aggressiveness --- p.79
Chapter 7.2.3 --- Effect of α --- p.82
Chapter Part III --- Conclusion
Chapter 8 --- Conclusion --- p.85
Chapter 8.1 --- Summary --- p.85
Chapter 8.2 --- Implication --- p.87
Chapter 8.3 --- Future Work --- p.88
Appendices
Chapter A --- Glossary --- p.91
Chapter B --- Introduction to Poisson counter driven stochastic differential equations --- p.97
Chapter C --- Simulation --- p.101
References --- p.103
Index --- p.105
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CHENG, YU-HAN, and 鄭煜翰. "Communication Platform of Heterogeneous Internet of Things – Access Control System as an example." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2es425.
Full textAbstract:
碩士國立高雄應用科技大學
資訊工程系
105
Recently, the information of technology is developing rapidly, and Internet of Things, IOT is also getting mature. So that most equipment or devices beside our life are usually have network abilities. Using IOT technique for data collection let us can get more effective to control all devices and that also can bring more convenience for our life quality. But in current situation for IOT technique have a serious problem, which is the communication technique between different equipment or device all are different. Therefore, the real-time information and status of the devices cannot be effectively integrated and thus the integration of heterogeneous information in the IOT technique is difficult to how to integrate the data and try to converse the data into protocol of every different device, which is we aim to. This paper we are mainly to research about RFID reader, in the case of different brand of RFID reader, we solve the problem, which is how to converse the format to different RFID reader in the same data. We can use this method to integrate different device in the same system without rebuild the system, and we also can reduce the costs and effectively use resource for the company.
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DENG, YOU-TENG, and 鄧宥騰. "The Design of Heterogeneous Network Monitoring System Applied in Agricultural Internet of Things." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/73r2vq.
Full textAbstract:
碩士國立虎尾科技大學
資訊工程系碩士班
107
The Internet of Things (IoT) technology industry has flourished in recent years and is widely used in various industries in human life. In agricultural applications, in order to improve their industrial output value and effectively solve the problem of agricultural management manpower faults, many traditional aquaculture industries have adopted agricultural Internet of Things technology to build smart agriculture systems in recent years, and through the collection of sensing information, the most Favorable decision making and control. However, the acquisition of the sensing signals of its monitoring system is often limited by the actual field environment. Therefore, how to effectively install the monitoring system in various field environments and solve the integration between heterogeneous networks is one of the important issues that need to be solved in smart agriculture. In the monitoring systems currently deployed on the market, both wired networks and wireless network sensing are often incompatible. Therefore, in the heterogeneous network monitoring system designed in this study, the Modbus communication protocol is adopted as a common communication protocol between heterogeneous networks, so that the system can quickly integrate the sensing data of wired and wireless networks, and combined with the map. The InduSoft-SCADA monitoring system of the control interface allows users to visually obtain instant sensing information, thereby enabling system application and design of smart agriculture. After the field test of this study, it is preliminarily verified that the system can meet the needs of Taiwan's aquaculture industry, and can be actually installed in the poultry farm field, and the system can also stably retrieve the data and retrieve it into the database for storage. Establish the purpose of the heterogeneous network monitoring system applied in agricultural Internet of Things. Finally, we conduct preliminary data analysis on the relevant sensory data collected by the existing poultry house. From the sensing data such as temperature, humidity, CO2 and differential pressure, using clustering and correlation analysis, we can analyze which environmental key factors affect the daily water consumption and feed intake of birds. In the future, the heterogeneous network monitoring system built by the Institute will allow the farmers to use the best breeding and monitoring environment to increase productivity, and make smart agriculture a new milestone.