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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Role of a Small Switch in a Network-Based Data Acquisition System

Hildin, John 10 1900 (has links)
ITC/USA 2010 Conference Proceedings / The Forty-Sixth Annual International Telemetering Conference and Technical Exhibition / October 25-28, 2010 / Town and Country Resort & Convention Center, San Diego, California / Network switches are an integral part of most network-based data acquisition systems. Switches fall into the category of network infrastructure. They support the interconnection of nodes and the movement of data in the overall network. Unlike endpoints such as data acquisition units, recorders, and display modules, switches do not collect, store or process data. They are a necessary expense required to build the network. The goal of this paper is to show how a small integrated network switch can be used to maximize the value proposition of a given switch port in the network. This can be accomplished by maximizing the bandwidth utilization of individual network segments and minimizing the necessary wiring needed to connect all the network components.
2

A scalable, resilient, and self-managing layer-2 network

Qian, Chen, active 2013 16 October 2013 (has links)
Large-scale layer-2 Ethernet networks are needed for important future and current applications and services including: metro Ethernet, wide area Ethernet, data center networks, cyber-physical systems, and large data processing. However Ethernet bridging was designed for small local area networks and suffers scalability and resiliency problems for large networks. I will present the architecture and protocols of ROME, a layer-2 network designed to be backwards compatible with Ethernet and scalable to tens of thousands of switches and millions of end hosts. We first design a scalable greedy routing protocol, Multi-hop Delaunay Triangulation (MDT) routing, for delivery guarantee on any connectivity graph with arbitrary node coordinates. To achieve near-optimal routing path for greedy routing, we then present the first layer-2 virtual positioning protocol, Virtual Position on Delaunay (VPoD). We then design a stateless multicast protocol, to support group communication such as VLAN while improving switch memory scalability. To achieve efficient host discovery, we present a novel distributed hash table, Delaunay DHT (D²HT). ROME also includes routing and host discovery protocols for a hierarchical network. ROME protocols completely eliminate broadcast. Extensive experimental results show that ROME protocols are efficient and scalable to metropolitan size. Furthermore, ROME protocols are highly resilient to network dynamics. The routing latency of ROME is only slightly higher than shortest-path latency. / text
3

A cidade invisível: redes de infraestrutura - alternativas possíveis / The Invisible City: Infrastructure Networks - Possible Alternatives

Pestana, Katia Bomfim 04 May 2017 (has links)
A pesquisa é conduzida pela hipótese de que as redes de infraestruturas de serviço são capazes de conformar um sistema de áreas livres, alternativo às ruas, que permite dar continuidade a um tecido essencialmente descontínuo e sem referências urbanas significativas, como a cidade de São Paulo. Há um entendimento preliminar de que essas áreas se constituem em um \'patrimônio histórico não edificado\' e assim devem ser tratadas, como áreas que a cidade precisa saber preservar. A partir da dissertação de mestrado desenvolvida sobre o impacto de um oleoduto no contexto da malha metropolitana de São Paulo - onde se propunha situar o sistema dutoviário como um modal de transporte específico, discutindo alternativas de ocupação junto a sua faixa dominial - outras redes de infraestruturas são incorporadas neste trabalho e foram selecionadas a partir da visibilidade de sua faixa dominial no tecido urbano da cidade. Assim, a passagem de adutoras, das redes de alta tensão, e dos próprios oleodutos, é mapeada com intuito de capturar esses vazios funcionais. O levantamento de mapas históricos e a história da implantação das redes de serviço na cidade subsidiam a análise e a compreensão das permanências e ampliações que sofreram estas redes em função de sua evolução técnica e do crescimento da demanda em larga escala desde o final do século XIX até hoje e, a discriminação das várias instâncias legais das políticas públicas da área metropolitana de São Paulo, a regulação setorial de cada um dos serviços estudados e o entendimento do funcionamento técnico na sua lógica de ocupação dos espaços da cidade, procuram entender as diversas estratégias utilizadas pelas concessionárias no controle de sua faixa funcional. A escolha de alguns estudos de casos exemplares, aonde esses espaços livres oferecem situações reais de incorporação ao desenho da cidade, e a aferição dessas áreas como possíveis \'agentes\' de melhoria urbana e ambiental, é feito através de mapeamentos que transitam entre as várias escalas de análise e tem como objetivo tornar visíveis as faixas non aedificandi fazendo ver os caminhos percorridos por essas redes no território, identificando tipologias de ocupação, tanto a partir de condicionantes dadas pelo lugar de sua inserção, como por suas exigências e especificidades técnicas setoriais. / The research is driven by the hypothesis that the service infrastructure networks are able to form a system of free areas, alternative to the streets, that allows to continue an essentially discontinuous fabric and without significant urban references, such as the city of São Paulo. There is a preliminary understanding that these areas constitute an \'non built up heritage\' and as such shall be considered as areas which the city must know how to preserve. From the development of the Masters dissertation about a pipeline within the context of São Paulo\'s metropolitan grid - where it proposed to situate the pipeline system as a modal of specific transport, discussing ocupational alternatives next to its dominial strip - other infrastructure networks are incorporated in this work and were selected from the visibility of its dominial strip in the urban fabric of the city. Therefore, the passage of pipelines, high-voltage networks and the oil pipeline themselves are mapped with the aim of capturing these functional vacancies. The survey of historical maps and the history of the implantation of service networks in the city subsidize the analysis and the comprehension of the permanences and expansions which these networks underwent as a result of the technical evolution and the rise of the large scale demand since the end of the XIX century until today and, the discrimination of the various legal instances of public policies of São Paulo\'s metropolitan area, the sectoral regulation of each of the studied services and the understanding of the technical operation within its logic of the city\'s use of spaces, seek to understand the various strategies used by the concessionaires in control of its funcional strip. The choice of some model case studies, where these free spaces provide real situations for development into the city\'s plan, and the assessment of these areas as possible \'agents\' of urban and environmental enhacement, is done through mappings which flow through the various scales of analysis and aims to make visible the non aedificandi strips revealing the paths taken by these networks in the region, identifying tipologies of occupation as much by the constraints given from the place of its insertion as by its requirements and sectoral technical specificities.
4

The Network Infrastructure : "A Case Study on Third Party in the Process of Networking"

Lundström, Elin January 2011 (has links)
This thesis increases the understanding of networking and especially the role of third parties in the network infrastructure. That networking is an important activity that plays a central role for companies’ success is common sense in today’s highly changing environment. However, the role of third parties operating within the networking infrastructure has only been research sparingly. As the author’s literature review showed even though we have knowledge about the network process and attributes of the different actors there is still a lack of theories to explaining them. For instance, it is still unknown how the third party can successfully bridge structural holes and how its specific characteristics influence the network. Furthermore, it is unclear how this is affecting the people and consequently the companies involved in the network. The empirical focus of this thesis is on the Swedish Chamber of Commerce in the Netherlands and the empirical study consists of a qualitative case study. Data is collected through documents, participant observations and qualitative interviews in the Netherlands. The research shows that the third party has succeeded in provide a business and social platform that facilitate the process of combination and exchange of intellectual capital and this creates business opportunities for the members of the network. The study contributes to the research about the third party in the network infrastructure by identifying three success processes how the third party can contribute to the business network and this are: firstly, in combining and exchanging knowledge through a well-developed network structure. Secondly, through creating anticipation and motivation between the members for sharing of knowledge and thirdly, when bridging the gap between different actors with various kinds of knowledge. The thesis also provides suggestions for how the third party can improve their work to create and deepen relationship within networking. As the thesis demonstrates the role of the third party in a network and as more business is done within networks and with the help of a third party, it also has practical implications. In particular, the study is beneficial for the Swedish Chamber of Commerce, but also for other third party organizations that aim to improve their role in the networking process.
5

Utilizing Crowd Sourced Analytics for Building Smarter Mobile Infrastructure and Achieving Better Quality of Experience

Yarish, David 04 January 2016 (has links)
There is great power in knowledge. Having insight into and predicting network events can be both informative and profitable. This thesis aims to assess how crowd-sourced network data collected on smartphones can be used to improve the quality of experience for users of the network and give network operators insight into how the networks infrastructure can also be improved. Over the course of a year, data has been collected and processed to show where networks have been performing well and where they are under-performing. The results of this collection aim to show that there is value in the collection of this data, and that this data cannot be adequately obtained without a device side presence. The various graphs and histograms demonstrate that the quantities of measurements and speeds recorded vary by both the location and time of day. It is these variations that cannot be determined via traditional network-side measurements. During the course of this experiment, it was observed that certain times of day have much greater numbers of people using the network and it is likely that the quantities of users on the network are correlated with the speeds observed at those times. Places of gathering such as malls and public areas had a higher user density, especially around noon which could is a normal time when people would take a break from the work day. Knowing exactly where and when an Access Point (AP) is utilized is important information when trying to identify how users are utilizing the network. / Graduate / davidyarish@gmail.com
6

A cidade invisível: redes de infraestrutura - alternativas possíveis / The Invisible City: Infrastructure Networks - Possible Alternatives

Katia Bomfim Pestana 04 May 2017 (has links)
A pesquisa é conduzida pela hipótese de que as redes de infraestruturas de serviço são capazes de conformar um sistema de áreas livres, alternativo às ruas, que permite dar continuidade a um tecido essencialmente descontínuo e sem referências urbanas significativas, como a cidade de São Paulo. Há um entendimento preliminar de que essas áreas se constituem em um \'patrimônio histórico não edificado\' e assim devem ser tratadas, como áreas que a cidade precisa saber preservar. A partir da dissertação de mestrado desenvolvida sobre o impacto de um oleoduto no contexto da malha metropolitana de São Paulo - onde se propunha situar o sistema dutoviário como um modal de transporte específico, discutindo alternativas de ocupação junto a sua faixa dominial - outras redes de infraestruturas são incorporadas neste trabalho e foram selecionadas a partir da visibilidade de sua faixa dominial no tecido urbano da cidade. Assim, a passagem de adutoras, das redes de alta tensão, e dos próprios oleodutos, é mapeada com intuito de capturar esses vazios funcionais. O levantamento de mapas históricos e a história da implantação das redes de serviço na cidade subsidiam a análise e a compreensão das permanências e ampliações que sofreram estas redes em função de sua evolução técnica e do crescimento da demanda em larga escala desde o final do século XIX até hoje e, a discriminação das várias instâncias legais das políticas públicas da área metropolitana de São Paulo, a regulação setorial de cada um dos serviços estudados e o entendimento do funcionamento técnico na sua lógica de ocupação dos espaços da cidade, procuram entender as diversas estratégias utilizadas pelas concessionárias no controle de sua faixa funcional. A escolha de alguns estudos de casos exemplares, aonde esses espaços livres oferecem situações reais de incorporação ao desenho da cidade, e a aferição dessas áreas como possíveis \'agentes\' de melhoria urbana e ambiental, é feito através de mapeamentos que transitam entre as várias escalas de análise e tem como objetivo tornar visíveis as faixas non aedificandi fazendo ver os caminhos percorridos por essas redes no território, identificando tipologias de ocupação, tanto a partir de condicionantes dadas pelo lugar de sua inserção, como por suas exigências e especificidades técnicas setoriais. / The research is driven by the hypothesis that the service infrastructure networks are able to form a system of free areas, alternative to the streets, that allows to continue an essentially discontinuous fabric and without significant urban references, such as the city of São Paulo. There is a preliminary understanding that these areas constitute an \'non built up heritage\' and as such shall be considered as areas which the city must know how to preserve. From the development of the Masters dissertation about a pipeline within the context of São Paulo\'s metropolitan grid - where it proposed to situate the pipeline system as a modal of specific transport, discussing ocupational alternatives next to its dominial strip - other infrastructure networks are incorporated in this work and were selected from the visibility of its dominial strip in the urban fabric of the city. Therefore, the passage of pipelines, high-voltage networks and the oil pipeline themselves are mapped with the aim of capturing these functional vacancies. The survey of historical maps and the history of the implantation of service networks in the city subsidize the analysis and the comprehension of the permanences and expansions which these networks underwent as a result of the technical evolution and the rise of the large scale demand since the end of the XIX century until today and, the discrimination of the various legal instances of public policies of São Paulo\'s metropolitan area, the sectoral regulation of each of the studied services and the understanding of the technical operation within its logic of the city\'s use of spaces, seek to understand the various strategies used by the concessionaires in control of its funcional strip. The choice of some model case studies, where these free spaces provide real situations for development into the city\'s plan, and the assessment of these areas as possible \'agents\' of urban and environmental enhacement, is done through mappings which flow through the various scales of analysis and aims to make visible the non aedificandi strips revealing the paths taken by these networks in the region, identifying tipologies of occupation as much by the constraints given from the place of its insertion as by its requirements and sectoral technical specificities.
7

Informationsveranstaltung: „Breitbandausbau – Herausforderungen und Fördermöglichkeiten“

Redlich, Matthias 13 June 2019 (has links)
Der flächendeckende Breitbandausbau geht voran. Damit bis spätestens 2018 jeder Haushalt in Deutschland mit mindestens 50 Mbit je Sekunde surfen kann, stellt der Bund für die Kommunen seit November Hilfsmittel in Höhe von 2,7 Milliarden Euro bereit. Handlungsbedarf ist dringend gegeben, denn das Vorhandensein einer bedarfsgerechten und funktionstüchtigen Netzinfrastruktur ist im interkommunalen Wettbewerb ein bedeutender Standortfaktor. Die Dringlichkeit einer flächendeckenden Glasfaserversorgung in Deutschland wird insbesondere im ländlichen Raum sichtbar.
8

Návrh rozšíření ICT infrastruktury v podniku / An Extension of the Company ICT Infrastructure

Polách, Jakub January 2017 (has links)
This thesis deals with the design of extending the ICT infrastructure in Aumeto s.r.o. There are theoretical points, techniques and methods that are used later. The analysis of current data network in Aumeto s.r.o. was the goal of the first part. Designed part is based on that analysis.
9

Návrh projektu síťové infrastruktury společnosti / Design of Project for Company Network Infrastructure

Cieluch, Jakub January 2019 (has links)
This diploma thesis is concentrated on the use of project management methods to create a new company network infrastructure. In the first part is a description of project management, project phases and other useful knowledge needed for the practice of project management. The next part is focused on the analysis of the company in which the network infrastructure will be introduced. Subsequently, the knowledge gained from the previous parts of the thesis is used to create a project proposal to build a new network infrastructure.
10

Network Management System Selection Process Based on Modern Challenges and Industry Needs

Kylmäaho, Lasse-Pekka, Kristjansson, Haraldur January 2023 (has links)
Network management systems (NMS) monitor, configure and maintain computer networks. Network operators providing networking services are responding to the evolving bandwidth, availability, and latency requirements by upgrading from legacy management systems to alternatives utilizing modern technologies. This paper addresses the trends and challenges of transitioning from legacy NMS to modern management systems. The academic research on network management systems is limited, and we aim to provide a knowledge base on the subject matter by conducting a literature review. The literature review consisted of 43 primary studies from which eight themes were identified by conducting thematic analysis. An NMS’s typical upgrade and selection process is largely unsystematic and based on anecdotal requirements. We utilize the discovered trends and challenges as the basis for the network management system selection process. The selection process was developed via the design science research methodology. The proposed selection process combines the business problems perceived by network service providers with state-of-the-art network research. The results of the review and the process development outline practical implications in the subject area of NMS and introduce potential future research areas in the field of network management.

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