Evaluation of IMRT and VMAT techniques with and without flattening filter using pareto optimal fronts

Mestrado em Radiações Aplicadas às Tecnologias da Saúde.

Os (in)sofismáveis caminhos do storytelling : Woody Allen e o documentário ficcionado

ABSTRACT: Between pure documentary and pure fiction there are, more and more, a reasonable number of cinematic alternatives that convey a dimension of non-reality. Between the pointedly factual discourse and the irrational belief in an entirely narrative world, there intervenes an informed conviction in a truthful but nonexistent universe, in which the formal enunciation sells an image of objectivity. In a path that leads us from the forms and contents of reflexive and performative documentaries, according to Bill Nichols, and ends up in fake documentary itself, we will have the opportunity to stress the filmic construction and its inherent narrative purpose, be it a fictional story or the creator himself as character (others would say subject) of the cinematic construct. In a boomerang kind of logic, the more the objects direct us to a referent, the more they restore us a creative/authorial reference and, along with it, the narrative idea that instills it. In Woody Allen’s case, this storytelling manifests itself in the fake documentary genre, which works as if it is the reality, only to better manifest the sole reality that interests the director: that of the metacinema, or the cinema as self-referencial reality. The practical examples will be derived from the following films: Take the Money and Run (1969) e Husbands and Wives (1992).

Inverse dynamics based predictive control for unified power flow controllers without DC bus

This paper presents a new predictive digital control method applied to Matrix Converters (MC) operating as Unified Power Flow Controllers (UPFC). This control method, based on the inverse dynamics model equations of the MC operating as UPFC, just needs to compute the optimal control vector once in each control cycle, in contrast to direct dynamics predictive methods that needs 27 vector calculations. The theoretical principles of the inverse dynamics power flow predictive control of the MC based UPFC with input filter are established. The proposed inverse dynamics predictive power control method is tested using Matlab/Simulink Power Systems toolbox and the obtained results show that the designed power controllers guarantees decoupled active and reactive power control, zero error tracking, fast response times and an overall good dynamic and steady-state response.