Novas narrativas sociais: as práticas de mídia livre através do audiovisual

Dissertação de mestrado apresentada à Escola Superior de Comunicação Social como parte dos requisitos para obtenção de grau de mestre em Audiovisual e Multimédia.Com a proliferação e popularização dos aparatos móveis de comunicação digital e o avanço dos dispositivos conectados à Internet, a mídia ganhou novos contornos, tanto quantitativos quanto qualitativos. O intenso fluxo de mudanças, em constante curso e evolução, trouxe para as mãos do grande público o material e espaço necessários para ser ativo na transmissão de mensagens na sociedade; em contrapartida, gerou uma perda do controle do conteúdo, excesso de informação disponível e inúmeros novos formatos de transmissão. Este trabalho pretende revisitar a bibliografia da área ao longo das últimas décadas, ressaltando os debates e teorias levantadas de acordo com as principais mudanças na Comunicação Social. As principais características da cada época trarão um contexto macro de manifestações sociais que hoje também apresentam-se no contexto micro. O uso social dos meios de comunicação é o foco e ponto chave para discutir o papel social, efetivo ou potencial, da mídia. Para que o benefício de controlar os meios de produção da informação, bem como aproveitar a liberdade presente no ciberespaço, seja utilizado em prol da sociedade e em favor da democracia. A importância histórica e social do discurso e da narrativa será explicado para comprovar a importância do debate sobre a mídia livre, assim como as suas principais características e práticas, ilustradas através do objeto de estudo, o coletivo Mídia NINJA.ABSTRACT: With the proliferation and popularization of mobile digital communication devices and the advancement of devices connected to the Internet, the media has gained new contours, both quantitative and qualitative. The intense flow of change, in constant progress and evolution, has brought into the hands of the general public the material and space necessary to be active in the transmission of messages in society; on the other hand, generated a loss of control of the content, excessive information available and numerous new transmission formats. This work intends to revisit the bibliography of the area over the last decades, highlighting the debates and theories raised according to the main changes in social communication. The main characteristics of each period will bring a macro context of social manifestations that today also present themselves in the micro context. The social use of the media is the focus and key point to discuss the social role, effective or potential, of the media. So that the benefit of controlling the means of information production, as well as taking advantage of the freedom present in cyberspace, be used for the benefit of society and for democracy. The historical and social importance of discourse and narrative will be explained to prove the importance of the debate about free media, as well as its main characteristics and practices, illustrated through the object of study, the collective Mídia NINJA.N/

A simplified and higher dynamic range version of the J(1) ... J(4) method for optical phase measurements

A new and an improved version of the J(1)...J(4) method for optical phase detection, named J(1)-J(3) method, is described, which is more stable to phase drift and simpler for implementation than the original one. The sensor dynamic range is increased while maintaining the accuracy and the minimum detectable phase-shift. The method is experimentally validated by using an electro-optic intensity modulator. The agreement between theoretical and experimental results, based on the 1/f voltage noise, is demonstrated. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 54:387-392, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26533Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Experimental study of the complex reflection coefficient of shear waves from the solid-liquid interface

The determination of the reflection coefficient of shear waves reflected from a solid-liquid interface is an important method in order to study the viscoelastic properties of liquids at high frequency. The reflection coefficient is a complex number. While the magnitude measurement is relatively easy and precise, the phase measurement is very difficult due to its strong temperature dependence. For that reason, most authors choose a simplified method in order to obtain the viscoelastic properties of liquids from the measured coefficient. In this simplified method, inconsistent viscosity results are obtained because pure viscous behavior is assumed and the phase is not measured. This work deals with an effort to improve the experimental technique required to measure both the magnitude and phase of the reflection coefficient and it intends to report realistic values for oils in a wide range of viscosity (0.092 - 6.7 Pa.s). Moreover, a device calibration process is investigated in order to monitor the dynamic viscosity of the liquid

A Simple maxwell Based Model in Order to Represent the frequency-dependent viscosity measured by ultrasound

A previous work showed that viscosity values measured high frequency by ultrasound agreed with the values at low frequency by the rotational viscometer when conditions are met, such as relatively low frequency viscosity. However, these conditions strongly reduce the range of the measurement cell. In order to obtain a measurement range and sensitivity high frequency must used, but it causes a frequency-dependent decrease on the viscosity values. This work introduces a new simple in order to represent this frequency-dependent behavior.model is based on the Maxwell model for viscoelastic , but using a variable parameter. This parameter has physical meaning because it represents the linear behavior the apparent elasticity measured along with the viscosity by .Automotive oils SAE 90 and SAE 250 at 22.5±0.5oC viscosities at low frequency of 0.6 and 6.7 Pa.s, respectively,tested in the range of 1-5 MHz. The model was used in to fit the obtained data using an algorithm of non-linear in Matlab. By including the viscosity at low frequency an unknown fitting parameter, it is possible to extrapolate its . Relative deviations between the values measured by the and extrapolated using the model for the SAE 90 and SAE 250 oils were 5.0% and 15.7%, respectively.©2008 IEEE

P3L-3 Viscosity measurement of Newtonian liquids using the complex reflection coefficient

This work presents the implementation of the ultrasonic shear reflectance method for viscosity measurement of Newtonian liquids using wave mode conversion from longitudinal to shear waves and vice-versa. The method is based on measuring the complex reflection coefficient (magnitude and phase) at a solid-liquid interface. Viscosity measurements were made in the range from 1 to 3.5MHz at 22.5°C for automotive oil (SAE40) and at 15°C for olive oil. Moreover, measurements of the olive oil were also conducted in the range from 15 to 30°C at 3.5MHz. The experimental results agree with those provided by a rotational viscometer. © 2006 IEEE

O fio de Ariadne ou os labirintos da memória - um estudo sobre interpretação consecutiva

A Interpretação Consecutiva consiste em ―écouter une information, à se l’approprier mentalement et à la rendre pour un auditoire donné ‖.(LEDERER, 1981:99) Como é evidente, esta operação pressupõe um domínio perfeito e total das línguas utilizadas, mas as operações mentais e cognitivas envolvidas exigem uma formação especial adequada, da qual o conhecimento das línguas é apenas uma parte

The J 1 …J 3 method for linear readout of dynamic phase change in a flextensional piezoelectric actuator

Abstract: A new improved version of the J 1 …J 4 interferometric method for optical phase measurements, named J 1 …J 3 method, is described, which is of easier implementation and is more stable to phase drift than the original one. This new spectrum technique is used to characterize a flextensional piezoelectric actuator by measuring its nanometric displacement amplitudes