Dissertationen zum Thema „Monopoles digitaux“
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Massimo, Francesco Sabato. „Mobilising work and demobilising labour under contemporary monopoly capitalism : a comparative study of the labour process and industrial relations in Amazon’s logistics network“. Electronic Thesis or Diss., Paris, Institut d'études politiques, 2024. http://www.theses.fr/2024IEPP0010.
Der volle Inhalt der QuelleThis thesis contributes to the study of one of the largest contemporary companies and perhaps the most representative of contemporary capitalism: Amazon. The main goal of this thesis is to bring labour back at the core of the analysis, showing its centrality in the production of value, even in those giant corporations called “digital monopolies”.With its vast logistics network and millions of employees scattered across dozens of countries, Amazon is an ideal case study for understanding (1) why these monopolies, despite their “digital” nature, rely on massive physical infrastructures and how these infrastructures depends on the activity of millions of workers – in the case of Amazon, wage-workers, particularly in logistics warehouses; (2) how Amazon manages this workforce in order to mobilise the effort of employees while simultaneously demobilising their resistance, but above all how these strategies change at the same time as the evolution of Amazon’s profit strategy (3) how the “disruptive” power of digital monopolies unfolds in historical and institutional contexts other than those of the United States, particularly in terms of labour regulations and its impact on working conditions in Amazon’s workplace. To answer these three questions, the thesis mobilises the results of a multi-level investigation: the level of the labour process, studied through participant observation, interviews with employees and written sources; the level of Amazon’s profit strategy, examining the company’s balance sheets, interviewing management, and analysing vast secondary sources; the level of industrial relations, local and transnational, analysed through the direct observation of trade union activities, interviews and secondary sources
LOVARELLI, ALESSIO. „Essays in Industrial Economics“. Doctoral thesis, Università degli Studi di Milano-Bicocca, 2023. https://hdl.handle.net/10281/403018.
Der volle Inhalt der QuelleThe thesis consists of two independent projects. The first uses the real options methodology for the analysis of policies for the development of new renewable plants. I propose a subsidy scheme that increases over time and a price cap, in order to increase the speed of the development of new production capacity and contain spending. The second paper, on the other hand, represents the anti-competitive behavior of a digital company, a data intermediary, which extracts information from consumers and subsequently allocates it strategically to product firms, allowing them to offer personalized prices. Furthermore, the intermediary is able to exploit the scale effects, typical of data production technologies, to consolidate its monopolistic position.
ALCÂNTARA, NETO Miércio Cardoso de. „Projeto de um monopolo Hi para aplicações no sistema brasileiro de TV digital“. Universidade Federal do Pará, 2013. http://repositorio.ufpa.br/jspui/handle/2011/3607.
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A presente pesquisa trata o projeto e análise de uma antena monopolo planar com geometria modificada visando sua utilização para recepção do sinal de TV digital operante no Brasil na faixa de 470 MHz a 806 MHz. Faixa essa contida no espectro de UHF – Ultra High Frequency (300 MHz a 3 GHz). Para desenvolvimento desse trabalho foi tomado como referência à antena denominada “The Hi Monopole”. Que originalmente foi apresentada para operar em sistemas UWB (Ultra Wide Band) em 3,1 a 10,6 GHz. Para o desenvolvimento do trabalho proposto, diferentes técnicas de adequação da antena podem ser utilizadas para operação em banda larga, tais como: modificação na estrutura da antena, carregamento resistivo, chaveamento, utilização de elementos parasitas e estruturas de casamento. O projeto de antenas banda larga pode ser realizado a partir de três abordagens diferentes: domínio do tempo, domínio da frequência e método de expansão por singularidades. O método no domínio da frequência foi empregado neste trabalho para o projeto da antena proposta, algumas das técnicas supracitadas foram analisadas almejando o aumento da largura de banda, sendo confeccionado um protótipo da antena para validar os conceitos empregados. A antena foi então projetada para a faixa de 470 MHz a 890 MHz. O protótipo construído para essa mesma faixa apresentou bons resultados, o que valida à técnica empregada. Aspectos positivos e negativos do uso desta técnica são discutidos ao longo do trabalho. O programa computacional comercial CST® MICROWAVE STUDIO, baseado na Técnica da Integração Finita (FIT), foi usado para simulações no domínio da frequência.
This research deals with the design and analysis of a planar monopole antenna with modified geometry aiming its use for signal reception of digital TV in Brazil working in the of 470 MHz to 806 MHz. Track this contained in the spectrum of UHF-Ultra High Frequency (300 MHz to 3 GHz). To develop this work was taken as reference the antenna called "The Hi Monopole". What originally was presented to operate in UWB (Ultra Wide Band) at 3.1 to 10.6 GHz. For the development of the proposed work, different techniques of adjustment of the antenna can be used for broadband operation, such as: changes in the structure of antenna, resistive loading, switching, using of parasitic elements and matching structures. The design of broadband antennas can be made from three different approaches: time domain, frequency domain and expansion for singularities method. The frequency domain method was employed in this work to the antenna design proposed, some of the techniques mentioned above were analyzed aiming to increase bandwidth, and made a prototype of the antenna to validate the concepts employed. The antenna was designed for the range of 470 MHz to 890 MHz. the prototype built for this same range presented good results, which validates the technique employed. Positive and negative aspects of use of this technique are discussed throughout the work. The commercial computer program CST® MICROWAVE STUDIO, based on the Finite Integration Technique (FIT) was used for simulations in frequency domain.
Almeida, Marcio Wohlers de 1949. „Reestruturação, internacionalização e mudanças institucionais das telecomunicações : lições das experiencias internacionais para o caso brasileiro“. [s.n.], 1994. http://repositorio.unicamp.br/jspui/handle/REPOSIP/285391.
Der volle Inhalt der QuelleTese (doutorado) - Universidade Estadual de Campinas, Instituto de Economia
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Resumo: Não informado
Abstract: Not informed.
Doutorado
Doutor em Economia
Dias, Ozenir Farah da Rocha 1988. „Implementação do religamento monopolar adaptativo rápido baseado na assinatura harmônica de tensão no simulador digital em tempo real (RTDS)“. [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259596.
Der volle Inhalt der QuelleDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
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Resumo: Este trabalho apresenta a implementação de um esquema de religamento monopolar adaptativo rápido baseado na medição do conteúdo harmônico da tensão da fase aberta nas extremidades da linha de transmissão. O objetivo principal deste esquema é controlar e reduzir o tempo compreendido entre a abertura e o religamento da fase em falta, como também bloquear a manobra em caso de faltas permanentes. O esquema proposto foi implementado em um relé de distância e um medidor de conteúdo harmônico. O método está baseado na identificação do instante de extinção da corrente de arco secundário para casos de faltas transitórias. Já para faltas permanentes é implementado o bloqueio da manobra automática e a abertura tripolar do disjuntor da linha protegida. A medição do conteúdo harmônico foi feita primeiramente utilizando um medidor de qualidade de energia comercial, que realiza a medição do conteúdo harmônico de acordo com a norma IEC 61000-4-3. Em seguida, foi utilizado outro método de medição do conteúdo harmônico, chamado de filtro de medição do conteúdo harmônico rápido, elaborado dentro do Simulador Digital em Tempo Real (RTDS). O sistema de transmissão utilizado foi modelado no RTDS e seus dados são dados reais do sistema interligado nacional (SIN). As faltas monofásicas transitórias foram simuladas utilizando o modelo de arco do próprio RTDS. Já para falta permanente utilizou-se uma resistência de 1 'ômega'. O esquema foi avaliado através de testes variando o ponto de aplicação do defeito e o valor da corrente de arco secundário
Abstract: This work presents the implementation of a scheme of fast adaptive single-phase reclosing based on measuring the voltage harmonic content at the opened faulty phase terminals. The main objective of this scheme is to control and to reduce the time between opening and reclosing of the phase in fault, and also to block the maneuver in case of permanent faults. The proposed scheme is implemented in a distance relay and a harmonic content meter. The method is based in the identification of the secondary arc current extinction moment for transient faults cases. For permanent faults an automatic blocking followed by circuit-breaker three-phase opening is implemented. The measurement of harmonic content was made initially using a commercial power quality meter, which performs the harmonic content measurement according to IEC 61000-4-3 standard. Another harmonic content measurement method was tested, the fast harmonic content filter measurement, elaborated within the real-time digital simulator (RTDS). The transmission system used was modeled on RTDS and the data corresponds to an actual Brazilian 500 kV system. To represent the transient single-phase fault it was used RTDS arc model. The permanent fault was modeled with an 1'ômega' resistance. The scheme was evaluated by varying the fault application point and the secondary arc current value
Mestrado
Energia Eletrica
Mestre em Engenharia Elétrica
CHIAROMONTE, NICOLA. „ESSAY ON ADVERTISING IN DIGITAL PLATFORMS AND THEIR TAXATION“. Doctoral thesis, Università degli Studi di Milano, 2020. http://hdl.handle.net/2434/752096.
Der volle Inhalt der QuelleSantos, Edson Tafeli Carneiro dos. „Uma nova proposta de antena banda larga para recepção do sinal de tv digital do padrão ISDB-T“. Universidade Presbiteriana Mackenzie, 2016. http://tede.mackenzie.br/jspui/handle/tede/2855.
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The digital television reception system has a number of possible technological changes in its architecture. One of the changes is the transition from the VHF broadcast band to UHF. This fact requires a change in design, size and electrical characteristics of the radio receiver antenna side. Among the desirable characteristics of an antenna operating in this frequency band are: omnidirectionality, gain, directivity and wideband required to cover the entire range, combined with low cost and easy construction. This work proposes a new antenna, formed by a planar monopole acting as irradiator element and supported by a conical structure attached to a cylindrical shaped element with sleeve format that promotes an increase and control of the bandwidth required to cover the entire UHF band, including GSM850 and GSM900 bands. The design of the proposed antenna was performed with a full wave electromagnetic field simulator. A prototype was built and simulated and experimental results showed that the proposed antenna could cover the range of 469.6 MHz to 1387.4 MHz, with a steady-state wave ratio of less than 2. The performance of the proposed antenna was compared with other monopole antennas in relation to the received power level. A digital TV receiver was used to verify system performance in a closed and urban environment.
O sistema de recepção da TV digital apresenta diversas mudanças tecnológicas na sua arquitetura. Uma das mudanças, é a alteração da faixa de transmissão do VHF para o UHF. Esse fato impõe uma alteração no desenho, tamanho e características radio elétricas da antena no lado do receptor. Dentre as características desejadas de uma antena que opere nessa faixa de frequências está a ominidirecionalidade, ganho, diretividade e largura de banda elevada para cobrir toda a faixa necessária, aliado a um baixo custo e facilidade de construção. Esta pesquisa apresenta uma nova proposta de antena, composta por um monopolo planar como elemento irradiador, e suportado por uma estrutura em formato de tronco de cone unida a um elemento cilíndrico em forma de luva para promover aumento e controle da largura de banda necessários para cobrir toda a faixa do UHF, inclusive as bandas GSM850, e GSM900. A antena proposta foi projetada com simulador de campo eletromagnético de onda completa. Um protótipo foi simulado e construído e os resultados experimentais demonstraram que a antena pode cobrir a faixa de 469,6 MHz a 1387,4 MHz, com uma taxa de onda estacionária inferior a 2. O desempenho da antena proposta foi comparada com outras monopolos em relação ao nível de potência recebido. Um receptor de TV digital foi utilizado para verificar o desempenho do sistema em um ambiente fechado e urbano.
Arantes, Pedro Fiori. „Arquitetura na era digital-financeira: desenho, canteiro e renda da forma“. Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/16/16132/tde-01062010-095029/.
Der volle Inhalt der QuelleContemporary architecture is dangerously enmeshed with the entertainment industry and the field of advertising. This meshing has pushed architectural form to the limits of materiality. Architecture today searches for maximum informational rent, a process typical of global product branding; through this process, established building and production principles are subverted by a play of volumes and effects beyond any rule or limitation. Relying on digital design technologies and the reorganization of the building site, this new fetishism of form, analogous to the autonomization of power and abstract wealth in contemporary capitalism, defines the new condition of architecture. We study this condition by focusing on the work of those architects who are most successful in the current system of professional recognition and rewards. So as to identify this architecture of exception more precisely, we analyze emblematic works from the last twenty years; in these works we identify a set of particularities and recurrent issues that define the political economy of exception and rule today. We begin by analyzing the tangle of meanings associated with contemporary built form. We then move on to the sphere of production from the new technologies of digital design to transformations in the building site. Finally, we examine three processes as they relate to contemporary architecture: circulation (through the proliferation of images in the media), consumption (in particular through the tourist industry), and distribution of wealth. Our investigation reveals that architectural production, in its new stage of conception and realization, is overdetermined by the search for monopoly rent through intrinsic properties of form. We argue that cutting-edge architecture has become one of the most expressive manifestations of flexible accumulation and brand revenue under the prevailing logic of financial capitalism.
Tsai, Chih-Yu, und 蔡智宇. „Active and Monopole Antennas for Digital TV“. Thesis, 2009. http://ndltd.ncl.edu.tw/handle/17301630546807455686.
Der volle Inhalt der Quelle國立中正大學
電機工程所
97
In this thesis, a planar antenna methodology for receiving digital television signals from terrestrial broadcasting is proposed due to its ultra-wide band, omni-directional radiation, high gain, low cost and small size. In a dipole antenna design, multiple loops are constructed in the proposed antenna. Since each loop corresponds to a specific frequency response, multiple loops can yield the integrated frequency response from coupling all frequency responses of multiple loops to reach an ultra-wide band. In the active antenna design, a dipole antenna integrated with a two-port amplifier through a 75 ohm inset microstrip feed line results in ultra-wide band and high gain. In a vehicular antenna design, a new microstrip Printed Circuit Board (PCB) integrated with an iron stick can lead to great matching impedance while adequately adjusting the length of the microstrip. The proposed vehicular antenna can have S11 below -10dB at the Ultra-High Frequency (UHF), ranging from 470MHz to 860MHz, with an average gain of 1.78dBi. In the monopole antennas with coplanar waveguide feed-in designs, we first develop a monopole antenna with a separate coplanar waveguide feed-in, and then modify the antenna’s etch and gap, resulting in high flexibility in the proposed separate feed-in design. Finally, we propose a design with two slot lines located at both sides of the antenna for coupling current paths, to manipulate the resonant frequency. Additionally, the gain is increased when the back of the signal side is added with a radiation metal strip.
Shih, Chun-Yin, und 石淳尹. „Compact Broadband Monopole Antenna for Digital Television Application“. Thesis, 2009. http://ndltd.ncl.edu.tw/handle/67345158971592300492.
Der volle Inhalt der Quelle國立臺灣大學
電信工程學研究所
97
Digital television (DTV) is an advanced technology that enables television stations to provide better pictures and sound quality. It can also offer multimedia service and great interactive capabilities. The date when television goes all digital has changed. In this thesis, we propose a compact planar monopole antenna for DTV applications on the terrestrial television broadcasting. The proposed antenna can be printed on dielectric substrate by using printed circuit board technique. Also, the proposed antenna has good feature owing to its low cost in fabrication and ease of construction. It can be easily placed into a portable device such as notebook or TV box. The proposed monopole antenna which consists of microstrip line and a patch with rectangular slits. The wideband property is achieved by using a ground plane with notch and a slotted plane on the monopole back side. These techniques are used to enhance the impedance-matching of the proposed antenna. The proposed antenna can provide a wide operating bandwidth for DVB-T signal reception in the UHF band. The measured radiation patterns show the good characteristics in the operating frequency bands. Details of the proposed antenna designs, analysis, and experimental results of the constructed prototypes are also included.
Gu, Hao-De, und 顧浩德. „Developing a Digital Instructional Monopoly Game Authoring Tool“. Thesis, 2018. http://ndltd.ncl.edu.tw/handle/4ddc54.
Der volle Inhalt der Quelle臺北市立大學
資訊科學系
106
Learning by playing is a joyful and natural learning approach, such as game-based learning. With the prompt development and widespread of information technology, digital game-based learning becomes a big trend in education in this decade, and has the potentials for enhancing the learning effect and motivation. But producing instructional game is tedious and demand high information skills including programming ability. How to offer a game producing tool for education is valuable, especially for schools’ teachers without coding skills. As a result, the primary purpose of this study was to develop an authoring tool for constructing a digital instructional monopoly game. This study adopted incremental model and web technology for developing the game authoring tool including server side and user side modules, through requirement analysis, system design, and programming stages. To support flexible use of this system, many management functions are designed including image management, test items management, hierarchical concepts management, and game projects management. Followed the system steps, the teachers can design their instruction game by their teaching creativity and content. The six game producing steps consist of concept building, test item management, event setting, monopoly map and event position, object tuning, and variables setting. After the teachers completed their game projects, their students can enter into game rooms and play the digital monopoly games. In order to examine the suitability of this tool, this study developed evaluation inventories and asked information technology experts and experienced schools’ teachers to test and assess this system. The evaluation results revealed that this system can help the teachers to construct suitable games for classroom and after class usage with a lot of workload. In addition, the produced monopoly game can promote the students’ interest and its supplemental content after game playing is helpful.
Bezerra, Maria Carollina Nicolini. „Mercado digital: considerações sobre as plataformas de mercado eletrônico e a economia movida a dados“. Master's thesis, 2021. http://hdl.handle.net/10316/97520.
Der volle Inhalt der QuelleHoje observamos uma economia que é movida a dados, desenvolvida em um contexto em que a informação se apresenta como fonte dominante de produtividade e poder, levando-se em consideração o desenvolvimento de novas tecnologias, principalmente o Big Data. Tendo em mente os vários setores da nova economia, as plataformas digitais protagonizam modelos de negócio baseados na coleta e análise de dados e, com isso, adquirem grande poder econômico. Dessa forma, o presente trabalho possui o objetivo de analisar os impactos da economia movida a dados e a sua relação com as leis de proteção de dados, em particular no controle de estruturas de integrações verticais e conglomerados no setor digital. Para tal, serão examinados conceitos como Mercados de Múltiplos Lados (multi-sided markets), efeitos de rede e o oferecimento de produtos e serviços em mercados a “preço zero”. O trabalho contém também considerações acerca de possíveis monopólios digitais que podem ser formar a partir das situações apresentadas, o que cria novos desafios para reguladores e autoridades antitruste. Alguns apontam para o mero tamanho, poder e conduta não regulamentada desses monopólios digitais. Outros se concentram na escala e velocidade sem precedentes com que os dados pessoais são coletados e usados no contexto de algoritmos de previsão, uma máquina onisciente e opaca que ameaça erodir os próprios alicerces da privacidade. Outros ainda destacam a capacidade dos monopólios digitais de controlar grande parte de nossa atenção, o que lhes permite ditar quais conteúdos são expostos e influenciar o comportamento dos indivíduos. Será ainda analisada a importância da regulamentação do ambiente digital que vem sendo realizada no âmbito da União Europeia, justificada também pela ocorrência do efeito Bruxelas, e da observância das características dos chamados bens públicos globais.
Today we observe an economy that is driven by data, developed in a context in which information presents itself as the dominant source of productivity and power, taking into account the development of new technologies, mainly Big Data. Bearing in mind the various sectors of the new economy, digital platforms are the protagonists of business models based on data collection and analysis and, as a result, acquire great economic power. Thus, this paper aims to analyze the impacts of the data-driven economy and its relationship with data protection laws, particularly in the control of vertical integration structures and conglomerates in the digital sector. To this end, concepts such as multi-sided markets, network effects and the offering of products and services in “zero price” markets will be examined. The work also contains considerations about possible digital monopolies that can be formed from the situations presented, which creates new challenges for regulators and antitrust authorities. Some point to the sheer size, power and unregulated conduct of these digital monopolies. Others focus on the unprecedented scale and speed with which personal data is collected and used in the context of predictive algorithms, an omniscient and opaque machine that threatens to erode the very foundations of privacy. Still others highlight the ability of digital monopolies to control much of our attention, allowing them to dictate what content is exposed and influence the behavior of individuals. The importance of the regulation of the digital environment that has been carried out within the European Union will also be analyzed, justified by the occurrence of the Brussels effect, and the observance of the characteristics of the so-called global public goods.
Chen, Te-Jen, und 陳德仁. „The Study of Digital Video Broadcasting Monopole Antenna for Notebook Computer Applications“. Thesis, 2011. http://ndltd.ncl.edu.tw/handle/62611227938504641338.
Der volle Inhalt der Quelle國立中央大學
電機工程研究所碩士在職專班
99
Abstract The main topic of this thesis is to design an antenna for compact wireless broadband digital video broadcasting system (Digital Video Broadcasting - Terrestrial, DVB-T). The antenna is fed by probe. A coupling structure in the center of the antenna is designed to generate low band and a chip resistor is added at the end of the antenna to increase bandwidth. The proposed antenna was fabricated on and FR4 substrate. The design parameters, such as the dimension of antenna (width and length) and chip resistor, were extensively analyzed by adjusting at different frequency bands (low-band, middle-band and high band). The return loss and radiation pattern were simulated and measured to verify the design concept. The compact wireless broadband digital video broadcasting system mentioned in the thesis conform with international norms of digital television bandwidth of 470 MHz to 860 MHz; the antenna gain can meet the requirement in real applications. The radiation pattern in E-plane exhibits an eight figure just as conventional monopole antenna. The radiation in H-plane shows an omni-directional pattern.
Zebiri, Chemseddine, Mohamed Lashab, F. Benabdelaziz, Raed A. Abd-Alhameed und Fauzi Elmegri. „A Grating Monopole Antenna on Metamaterial Using MSRR for DVB-T Application“. 2015. http://hdl.handle.net/10454/7883.
Der volle Inhalt der QuelleThis work presents a novel broadband monopole antenna for digital video broadcastingterrestrial (DVB-T) application. The proposed antenna consists of a grating patch and a concave rectangular ground plane with defected ground plane, and the Multiple Split-Ring Resonator (MSRR). The added part in the ground plane and the meta-material are used to enable the antenna height reduction for fixed ranges of operating frequency. The antenna can operate from 468 MHz to 894 MHz frequency range corresponding to 62.5% of impedance bandwidth for |S11|<-7.5 dB. Details of the proposed antenna designs and experimental results of the constructed prototypes are presented and discussed.
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Mikita, Peter. „Autorské právo v informační společnosti a na vnitřním trhu Evropské unie“. Doctoral thesis, 2018. http://www.nusl.cz/ntk/nusl-389202.
Der volle Inhalt der QuellePETRINI, Maria Celeste. „IL MARKETING INTERNAZIONALE DI UN ACCESSORIO-MODA IN MATERIALE PLASTICO ECO-COMPATIBILE: ASPETTI ECONOMICI E PROFILI GIURIDICI. UN PROGETTO PER LUCIANI LAB“. Doctoral thesis, 2018. http://hdl.handle.net/11393/251084.
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