Controle Ótimo Aplicado em um Modelo de Câncer

Pós-graduação em Matematica Aplicada e Computacional - FCT

As tecnologias da informação no dispositivo pedagógico

Information technologies have enabled new forms of interactions among individuals, and can also be found in various educational institutions. However, despite appropriating new technological tools, educational practices continue to be based on a supposed pedagogical subject conceived as a transcendent way, ignoring his emergence and his origin in a particular historical period , and the control mechanisms by which is immersed. as well. This article aims to present results of an analysis on technology and education based on the thought of philosopher Michel Foucault. We analyzed proposals and discourses found in articles in a magazine entitled Patio - Revista Pedagógica.

Ontopolíticas e diagramas históricos do poder: maioria e minoria segundo Deleuze e a teoria das multidões segundo Peirce

This article aims at developing the so-called ontopolitics as G. Deleuze s innovative contribution to contemporary political philosophy. This objective will lead us to inspect the concept of power that Deleuze borrowed from Foucault and extended in order to assign to it an ontological adequacy. The concept of power opens access to another important element of the Deleuzean political philosophy, that is, the study of the historical diagrams of the power in the so-called discipline and control societies. With the combined dynamical diagram of both, we become aware of the portrait Deleuze draws for the democracy in contemporary societies. Digging into the Deleuzean ontopolitics, we will devote ourselves to the concepts of majority, minority and minor-becoming. It is in this point that the meeting between Deleuze s ontoplitics and Ch. Sanders Peirce s mathematical ontology becomes sound. It happens that Deleuze s ontopolitical concepts, besides their bond to an ontology of the power, receive also a mathematical treatment related to certain arithmetical (denumerable and nondenumerable) and geometrical notions (lines). The majorities and minorities are denumerable sets which are crossed by nondenumerable becomings. This step done, we will reach the stand point of the present paper, where we carry out initial approach with regard to an image for the concepts of majority and minority on the basis of Peirce s theory of collections and multitudes, mostly envisaging the mathematical ontology included in it. Accordingly, the main operation to be accomplished is that the Deleuzean distinction between the denumerable majorities/minorities and the nondenumerable mino-becoming may be mapped out in terms of discrete collections called enumerable, denumerable and abnumerable or postnumerable, in compliance with Peirce s terminology.

Equívocos na leitura da teoria de Jean Piaget

Dans cet article, nous présentons l'analyse des erreurs commises par rapport à l'épistémologie génétique et la psychologie de Jean Piaget. Nous nous appuyons sur un essai publié dans un périodique brésilien concernant la constitution du sujet d’enfance et la théorie de Piaget. Nous avons comme but d’aider à reprendre la «vraie» théorie de Piaget et de donner un aperçu aux lecteurs à fin de ne pas reproduire de telles erreurs ou être confrontés à de différents sens donnés à la même théorie. En ce qui concerne l'analyse, les auteurs du rapport disent que l'homme est le résultat de différents stades de développement et de ses phases. Cependant, en cherchant à expliquer comment les structures logiques deviennent nécessaires, Piaget a affirmé de ne pas rien avoir inventé. Il a conclu que la constitution des structures opératoires est le résultat de l'interaction du sujet avec le milieu, à condition qu'il dispose de certaines conditions prealables et qu’il soit capable d' établir ses rapports De cette manière, s'il a identifié des moments de la psychogenèse cognitive, il l’a fait grace à la constatation de que les sujets, dans cette interaction avec le milieu, finissaient par construire des manières qualitativement différentes de comprendre et gérer la réalité. Ainsi, Piaget n'a pas cherché de mettre les individus dans des phases ou périodes, artificiellement. Une autre erreur est celui de considérer que Piaget soit adepte de la dicotomie normalité/ anormalité. Ses préoccupations sont de nature épistémologique, et s'il est parvenu à formuler une psychologie, cela avait comme but de donner une base scientifique à sa théorie de la connaissance. Encore une autre confusion a lieu quand on affirme que Piaget a identifié les enfants aux peuples primitifs. Il a seulement dit que la nécessité d’entrer en relation avec le milieu est égale pour l'homme primitif comme pour celui d'aujourd'hui; par conséquent, le fonctionnement est le seul élément biologique considéré par Piaget, vu que tous les êtres vivants cherchent à s’adapter à la réalité. D’après cet angle, on constate que, de la même manière que l’homme primitif a été un enfant - comme ceux d’aujourd'hui - il a cherché à interagir avec le milieu à fin d'assurer sa survie. Il arrive que ses demandes étaient élémentaires du point de vue logico-mathématique, contrairement à nos jours. Une autre erreur consiste à dire qu'il a soupçonné ou admis que les processus de pensée reconnaissaient une organisation logique. Il ne s’agit pas de soupçon ni d'admission, mais d´une nécéssité. Faute de cette fondation, tout le bâtiment piagétien s’effondrerait. Nous concluons que le concept de progrès et l'état de l'intelligence sous-entendent la critique des auteurs. Malgré cela, et même pas sans admettre les explications formulées par Piaget, c’est le fait de que les censeurs doivent faire face à une vérité: indépendamment de la culture ou du moment historique, les enfants agissent toujours de la même manière, en cherchant à donner un sens à la réalité. Nous pouvons donc être d’accord ou en désaccord avec l'explication de Piaget. Cependant, il y a quelque chose qui ne doit pas être ignorée: la contribution apportée par Piaget vers la compréhension de la logique du fonctionnement mental.

Convexidade generalizada em problemas de controle ótimo com tempo livre

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Sistemas de controle em domínios estratificados

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Condições de otimidade para problemas de controle ótimo com condições de contorno funcionais

Pós-graduação em Matemática - IBILCE

Estratégias de leitura: relações entre as concepções do material Linguagens, Códigos e suas tecnologias: língua portuguesa e a prática docente

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Incerteza intervalar em otimização e controle

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

O estudo do Instituto Fernando Henrique Cardoso na perspectiva da teoria arquivística pós-custodial

Pós-graduação em Ciência da Informação - FFC

Movimento dos olhos e controle postural

The control of stances such as the upright stance seems not to have a purpose in itself; this control could facilitate the execution of other simultaneous tasks, the so-called suprapostural tasks. The goal of this study was to determine the effects of saccadic eye movements on the control of posture. Twelve adult participants had their body oscillations analyzed while standing upright, for 70 s, in the postural conditions of feet apart and feet together, performing fixation in the central target or horizontal saccadic movements, in the conditions slow (0,5 Hz) and fast (1,1 Hz). The results showed that saccadic movements, independently of their frequency, strongly reduced trunk and head oscillations in the anterior-posterior (AP) axis. In this axis, there was an effect of feet position only in head oscillation. In the medio-lateral (ML) axis, the results showed a strong effect of feet position with body oscillation decreased in the condition of feet apart. The effect of the visual task in the ML axis occurred only for trunk oscillation, not reaching significance level in the pairewise comparisons. In the AP axis, the data corroborate a facilitatory explanation of the control of posture: the reduction in body oscillation limited the variations of the stimulus image projected on the retina, facilitating the execution of saccadic movements as compared to fixation. In the ML axis, the effect of reducing the basis of support was more evident than the effect of saccadic movements, suggesting that the available resources were used primarily for the postural task in detriment of the visual task. Additionally, aspects like attentional focus and sensory information pick up are discussed as mechanisms involved in this task

A complexidade de tarefas de controle postural afeta a sensibilidade háptica proporcionada pelo toque leve?

A utilização de pistas hápticas para a estabilização da postura através do toque vem sendo apontada como uma eficiente fonte de informação sensorial que conecta o indivíduo ao meio. Dessa forma, o paradigma do toque leve (i.e., tocar uma superfície com força inferior a 1 Newton) é uma das possibilidades de, através do contato com determinada superfície, atenuar as oscilações do indivíduo. Sendo assim, o objetivo deste estudo foi verificar a eficiência do toque leve em tarefas de alta complexidade ao equilíbrio e, concomitantemente, analisar a relação entre percepção háptica e controle da postura. Para isso, 15 adultos jovens saudáveis participaram deste estudo, permanecendo em pé na posição tandem sobre uma plataforma de força e-nas condições pertinentes-sobre uma trave de equilíbrio. As condições deste estudo variaram entre a utilização ou não do toque, a utilização ou não da visão, e ainda, permanecer em pé sobre uma superfície de altura normal (0 cm) ou uma superfície com elevação (20 cm). Através da análise estatística avaliamos as variáveis amplitude média de oscilação (ântero-posterior e mediolateral), velocidade média (ântero-posterior e medio-lateral) e a trajetória total. Nossos resultados demonstraram, como já era esperado, um aumento significativo da oscilação corporal nas condições sem toque e sem a utilização da visão, e ainda maior quando houve elevação da superfície de apoio dos pés. Entretanto, quando o toque leve foi utilizado nessas mesmas condições houve uma redução significativa da oscilação postural dos indivíduos. Dessa forma, concluímos que mesmo em tarefas de alta instabilidade ao equilíbrio, o toque leve continua auxiliando no controle da postura

Efeito de tarefa dupla no controle postural de adultos idosos: acoplamento sensório-motor

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Efeitos de uma tarefa dupla e demandas da tarefa no controle postural de adultos jovens

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Controle de fotoassociação caótica com campos externos

The objective of the present work was to study the control of the dynamics of diatomic heteronuclear molecules interacting with electric fields created by lasers. Specifically in this work, the molecular photoassociation phenomenon will be analyzed. At this phenomenon, the atom's relative movement is described by a particle that moves in a morse potential well under the influence of an external time dependant force related to the external field. Based on the optimum control theory (OCT), it is presented at the present work laser pulses that alternate a given initial molecular state to a desirable end state, wich in this work was represented by the minimization of a cost functional that indicates how close. To do so, a computational sistem know as Genetic Algorithm (GA) was developed that can be characterizes as an extremelly eficient technique capable of scanning the solutions space and find results close to the optimum solutions