Orientador: Hélio Pedrini / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-19T09:57:00Z (GMT). No. of bitstreams: 1 Cirne_MarcosViniciusMussel_M.pdf: 1926930 bytes, checksum: f94d049039c1abff157b84b09233ddf2 (MD5) Previous issue date: 2011 / Resumo: O resumo poderá ser visualizado no texto completo da tese digital / Abstract: The complete abstract is available with the full electronic document / Mestrado / Ciência da Computação / Mestre em Ciência da Computação

Orientador: João Francisco Duarte Júnior / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Artes / Made available in DSpace on 2018-08-19T14:24:05Z (GMT). No. of bitstreams: 1 Goncalves_EdsonAntonio_M.pdf: 18997944 bytes, checksum: 2088f44ef38ed6c46231aedcfb578860 (MD5) Previous issue date: 2011 / Resumo: A intenção deste trabalho pode ser justificada em sua essência: uma experiência em arte-educação. Ele destaca propostas de atividades com metas realistas, mais próximas ao universo do aluno e que possam ser realizadas dentro da sala de aula. Neste sentido, a educação (do) sensível - estimulada pela experiência e observação estreita do nosso cotidiano, a contemplação da natureza e a simbiose com vivências e pesquisas oferecidas pela Cultura Popular - demonstrou ser forte aliada. Os procedimentos foram cruciais para facilitar a aprendizagem conceitual e para despertar o interesse na produção de esculturas nas aulas de artes. O desenvolvimento de obras tridimensionais com os alunos do Ensino Fundamental parecia ser um grande desafio, uma vez que estamos cientes da falta de equipamentos apropriados e espaços adequados para tal prática. A confecção dos bonecos gigantes constituiu a provocação necessária para despertar o interesse dos educandos, e a oficina de artes realizadas no âmbito da Escola CEFI (Centro de Educação e Formação Integrada) facilitou o desenvolvimento do processo. A prática da reciclagem de materiais de uso diário descartados, por meio de obras em assemblage, permitiu não só sensíveis encantos, mas também refinou a sensibilidade estética dos aprendizes. Além disso, gerou consciência e respeito ao meio ambiente. Estimulou iniciativas de conservação e preservação. O entendimento da Cultura Popular, conseguida através deste projeto, transformou uma ação pedagógica, inicialmente restrita ao ambiente de uma escola, em um compromisso prazeroso com a sociedade. Este processo possibilitou o retorno dos Bonecos Gigantes ao Carnaval de Atibaia, que há vinte anos haviam desaparecido. Houve grande apelo emocional e desenvolvimento mútuo. Os alunos produziram esculturas que reuniram o público no centro da cidade, onde puderam interagir e se complementar: obras e espectadores / Abstract: The intention of this work can be justified in its essence: it is an experiment in art education. It highlights proposals of activities with realistic goals, closer to the student's universe and that can be undertaken within the classroom. In this sense, sensitive education - stimulated by the experience and close observation of our everyday life, the contemplation of nature and the symbiosis with experiences and research offered by popular culture - was a strong ally. The aforementioned procedures were crucial to facilitate conceptual learning and to awaken the interest in the production of sculptures in art classes. The development of three-dimensional works with students in elementary school seemed like a great challenge for us, given that we are aware of the lack of appropriate equipments and suitable spaces for such practice. The confection of giant puppets was the teaser to awaken the student's interest, and the arts workshop carried out within CEFI School (Center for Integrated Education and Training) has facilitated the development process. The practice of recycling materials of daily use, by means of works of assemblage, resulted not only in sensitive enchantment, but also raised the aesthetic sensibility of the apprentices. Furthermore, it advanced awareness and respect for the environment and encouraged conservation initiatives. The understanding of popular culture achieved through this project transformed a pedagogical action, initially restricted to the ambient of a school, into a pleasurable engagement with society. This process also recovered the Giant Puppet Carnival at Atibaia, that disappeared twenty years ago. There was great emotional appeal and mutual development. The students produced sculptures that met the public in the city center, where they interacted and complemented each other: works and spectators / Mestrado / Artes Visuais / Mestre em Artes

Orientadores: Roberto de Alencar Lotufo, Alexandre Xavier Falcão / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-03T23:34:21Z (GMT). No. of bitstreams: 1 Audigier_RomaricMatthiasMichel_M.pdf: 1373374 bytes, checksum: 2cce7904815a4af77a789d89e203ddc0 (MD5) Previous issue date: 2004 / Mestrado / Engenharia de Computação / Mestre em Engenharia Elétrica

Orientador: Jose Joaquin Lunazzi / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin / Made available in DSpace on 2018-08-04T02:40:53Z (GMT). No. of bitstreams: 1 Magalhaes_DanielSouzaFerreira_M.pdf: 2786566 bytes, checksum: d02ed179060d33a6a269a495bcb6a2bb (MD5) Previous issue date: 2005 / Resumo: Neste trabalho analisamos a formação de imagens por elementos difrativos com luz branca fazendo o traçado de raios pelas direções principais e explorando as possibilidades que a simetria de um conjunto de dois elementos definidos bidimensionalmente e intermediados por um pequeno orifício oferece. A mais interessante delas é a de termos uma imagem convergente, que pode ser vista projetando sobre uma tela, por exemplo / Abstract: We perform ray tracing analysis on the imaging of white light objects by diffractive elements by means of the main direction of the rays. We explore the possibilities that the symmetry of a set of two bidimensionally acting diffracting elements intermediated for a pinhole offers. The most interesting of them is that we have a convergent image, that can be seen projecting on a screen, for example / Mestrado / Ótica / Mestre em Física

Previous research into microbial colonies and biofilms shows a significant gap in our current understanding of how bacterial structures develop. Despite the huge body of research undertaken into the formation, genetic makeup, composition, and optimal growth conditions of colonies, no study has been successful in identifying all individual bacteria in a colony in three-dimensions as a function of time. This lack of bacterial cell lineage in such a simple class of organisms is conspicuous in the light of what is known about other organisms, such as Caenorhabditis elegans [1]. In this thesis I show that using laser scanning confocal microscopy in conjunction with developments in sample preparation and post acquisition image analysis, it is possible to fully reconstruct all individual bacteria within an Escherichia coli (E. coli ) microcolony grown in viscoelastic media. Additionally, I show that by further pushing the resolution of confocal microscopes, commercial systems are capable of extracting three-dimensional information on protein structures inside bacteria at early stages of growth. This thesis is in three parts. The first part shows that by pushing the resolution of a commercial laser scanning confocal microscope system it is possible to achieve single cell resolution of a bacterial colony growing in three dimensions in a viscoelastic medium (agarose) from a seed bacterium. The growth of individual bacteria is examined as the concentration of agarose in the media is altered. Results show there is a nonlinear dependence between the rate of growth of a bacterium and the concentration of the agarose in the media with a peak in growth rate at 3% (weight) concentrations of agarose in M9 media. The second part of this work presents a study of how an initially two-dimensional colony growing between a glass slide and agarose gel suddenly invades the third spatial dimension by buckling. The results show that the cells within the centre of the colony flex and buckle, due to confinement by their neighbours, creating additional layers. Indeed, flexing is not limited to the buckling event but occurs throughout the early growth cycle of a colony. The final part of this thesis shows that by further pushing the resolution of confocal microscopes, commercial systems are capable of extracting three-dimensional information about the temporal evolution of the spatial distribution of the FtsZ septation ring within the cell. As the bacterial colony grows from a seed bacterium to a microcolony, the error in placing the division accurately at the cell centre is seen to increase as the number of bacteria within the colony increases and spatial confinement occurs.

One of the fastest developing areas in the entertainment industry is digital animation. Television programmes and movies frequently use 3D animations to enhance or replace actors and scenery. With the increase in computing power, research is also being done to apply these animations in an interactive manner. Two of the biggest obstacles to the success of these undertakings are control (manipulating the models) and realism. This text describes many of the ways to improve control and realism aspects, in such a way that interactive animation becomes possible. Specifically, lip-synchronisation (driven by human speech), and various modeling and rendering techniques are discussed. A prototype that shows that interactive animation is feasible, is also described. / Mr. A. Hardy Prof. S. von Solms

Augmented Reality (AR) and Virtual Reality (VR) provide powerful, natural, and robust ways to interact with digital content, across a number of different domains. AR and VR, collectively known as Extended Reality (XR), can facilitate the execution of surgical procedures, aid in maintenance and repair of mechanical equipment, provide novel visualization paradigms for data analysis, and even empower new ways to experience video games. These experiences are built on rich, complex real-time interactive systems (RISs) that require the integration of numerous components supporting everything from rendering of virtual content to tracking of objects and people in the real world. There are decades of research on the development of robust RISs, utilizing different software engineering modalities, which facilitate the creation of these systems. While in the past, developers would frequently write all of the components and the “logical glue” themselves (often built with graphics suites such as OpenGL and DirectX), with the the rise of popular 3D game creation engines, such as Unity and Unreal, new development modalities have begun to emerge. While the underlying game engines provide a significantly easier pipeline to integrate different subsystems of AR/VR applications, there are a number of development questions that arise when considering how interaction, visualization, rendering, and application logic should interact, as developers are often left to create the “logical glue” on their own, leading to software components with low reusability. As the needs of users of these systems increase and become more complex, and as the software and hardware technology improves and becomes more sophisticated, the underlying subsystems must also evolve to help meet these needs. In this work, I present a new software design pattern, the Relay & Responder (R&R) pattern, that attempts to address the concerns found with many traditional object-oriented approaches in XR systems. The R&R pattern simplifies the design of these systems by separating logical components from the communication infrastructure that connects them, while minimizing coupling and facilitating the creation of logical hierarchies that can improve XR application design and module reuse. Additionally, I explore how this pattern can, across a number of different research development efforts, aid in the creation of powerful and rich XR RISs. I first present related work in XR system design and introduce the R&R pattern. Then I discuss how XR development can be eased by utilizing modular building blocks and present the Mercury Messaging framework, which implements the R&R pattern. Next I delve into three new XR systems that explore complex XR RIS designs (including user study management modules) using the pattern and framework. I then address the creation of multi-user, networked XR RISs using R&R and Mercury. Finally I end with a discussion on additional considerations, advantages, and limitations of the pattern and framework, in addition to prospective future work that will help improve both.

Over the last decade, the demand for wireless networks with faster data rates has grown significantly. According to the 2021 Ericsson mobility report, the total global mobile data traffic is projected to grow by more than five times in the next five years. Wireless paradigms such as massive-MIMO and channel bonding have become increasingly popular in sub-6GHz systems to meet these demands. However, the future wireless growth demands us to look beyond these congested frequency bands toward the large unlicensed bandwidths available mm-wave and THz spectrum. In this dissertation, we exploit paradigms such as multi-user MIMO and channel bonding at the 60GHz IEEE 802.11ad/ay frequency band to build multi-Gbps transmitters.The other need for future wireless systems is high-resolution imaging, which has applications in autonomous systems, machine vision, medical diagnostics, and 3-D imaging. Particularly, Light-detection and Ranging systems, namely LIDARs, have attracted considerable attention owing to their higher spatial resolution over radars. Here, we show multiple prototypes of such electro-optical systems and demonstrate their capabilities through imaging with mm- to micro- meter-scale resolution. The key insight of this dissertation is that we use signal processing capabilities within a passive mixer driven by multi-phase LO to implement such wireless systems. These systems are demonstrated to provide significant improvement in power efficiency and scalability. The first chapter of the thesis presents compact, low-loss electro-optical phase-locked loops(EOPLL) with wide loop bandwidth, where we use harmonic- and image- reject capabilities of a multi-phase mixer to cancel the spurious tones generated by the phase detector. This EO-PLL, integrated with CMOS technology, suppresses the spurs at beat note by >25dB, enabling us to detect an object at a maximum range of >3.3m, with a precision of .558 mm at a 2m distance. The later part of the thesis focuses on building multi-Gbps mm-wave transmitters(TX) leveraging wireless paradigms such as multi-user MIMO and channel bonding. The thesis presents a MIMO 4-element transmitter(TX) array architecture where a single-wire IF interface connects the front-end with a baseband modem to increase the scalability of such systems. We use the harmonic-rejection mixing (HRM) feature of a single passive mixer to de-multiplex the four modulated signals simultaneously from the single-wire interface. A 60GHz, 4-element TX prototype is presented, which can support an 8GHz of total IF bandwidth at the single-wire interface and is capable of transmitting 64-QAM modulated signals. Later on, we realized that the same harmonic- and image- rejection feature can readily be applied to channel bonding TX systems with high aggregate bandwidth. The benefit of this architecture is that it alleviates the need for high-speed, power-hungry ADCs/DACs at the baseband and thereby significantly improving the system cost and efficiency. This thesis presents a 59-67GHz channel bonding transmitter with a channel bonded bandwidth of more than 8GHz while using DACs with a sampling rate of only 2GS/sec, providing 4 times improvement from traditional architectures. Looking into the future, we envision that the concepts and prototypes presented in this dissertation can be deployed in THz systems. In conclusion, we look beyond CMOS technology and provide pathways to enable THz transmitters with high transmit power, leveraging the heterogeneous integration capabilities of III-V semiconductors.

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