Systems Of Representation
Mostrando 37-48 de 355 artigos, teses e dissertações.
-
37. Busca informada por abordagem semiótica em redes sociais inclusivas online / Search informed by a semiotic approach in inclusive social network services
Social Network Services (SNSs) may represent an opportunity for not digitally literate people to effectively familiarize themselves with information and communication technologies. For that, these systems should provide inclusive access, creating situations where users cultural diversity is respected and their difficulties minimized. SNSs with resources that
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
-
38. Local stabilization of linear systems under amplitude and rate saturating actuators
This note addresses the problem of local stabilization of linear systems subject to control amplitude and rate saturation. Considering the actuator represented by a first-order system subject to input and state saturation, a condition for the stabilization of an a priori given set of admissible initial states is formulated from certain saturation nonlinearit
Publicado em: 2011
-
39. SOBRE O PAPEL DA LÍNGUA NO DESENVOLVIMENTO DE HABILIDADES COGNITIVAS SUPERIORES: REPRESENTAÇÃO, RECURSIVIDADE E COGNIÇÃO NUMÉRICA / ON THE ROLE OF LANGUAGE IN THE DEVELOPMENT OF HIGHER COGNITIVE FUNCTIONS: REPRESENTATION, RECURSION AND NUMERICAL COGNITION
This thesis investigates the possible relationship between two central aspects of the human cognition, namely, the capacity of any child to acquire a natural language (in the absence of neurological or social impairments) and the development of high cognitive abilities, which appear to be specifically human. As far as the latter is concerned, numeral abiliti
Publicado em: 2011
-
40. Uma abordagem funcional para o ensino de inequações no ensino médio
This qualitative research was conducted with students undergoing the second year if Senior High School in a private school in the south area of São Paulo. We looked for answers to the following questions: Up to what extent does the teaching of inequalities through a functional graphic approach, which involves the treatment and conversion of registers of sem
Publicado em: 2011
-
41. Polyhedral regions of local stability for linear discrete-time systems with saturating controls
The study and the determination of polyhedral regions of local stability for linear systems subject to control saturation is addressed. The analysis of the nonlinear behavior of the closed-loop saturated system is made by dividing the state space in regions of saturation. Inside each of these regions, the system evolution can be represented by a linear syste
Publicado em: 2011
-
42. On the aubry-mather theory for symbolic dynamics
We propose a new model of ergodic optimization for expanding dynamical systems: the holonomic setting. In fact, we introduce an extension of the standard model used in this theory. The formulation we consider here is quite natural if one wants a meaning for possible variations of a real trajectory under the forward shift. In other contexts (for twist maps, f
Publicado em: 2011
-
43. Simulação da dinâmica lateral de um elevador por meio de sistemas pendulares representados através do método de espaço de estados / State space representation of the lateral dynamic of an elevator modeled by pendular systems
Este trabalho aborda a modelagem do comportamento dinâmico do movimento lateral de elevadores por meio de pêndulos, para fins de desenvolvimento de algoritmos de controle de sistemas de suspensão ativa em elevadores de alto desempenho. O objetivo é avaliar o grau de validade da representação de elevadores por pêndulos simples, comumente usada na liter
Publicado em: 2011
-
44. "Dinâmica espacial urbana e potencial de atratividade"
Urban environment changes according to the needs of our society. These modifications are identified in characteristics such as building typology, intensity of urban occupation, and infrastructure. Each decision is taken considering the existing urban structure and it limits the decisions of other activity units by the use of space or the relations that are e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
-
45. Simulação da dinâmica de carbono em bacias hidrográficas
In most aquatic ecosystems respiration exceeds autochtonous gross primary production leading to a negative net ecosystem production. Recent studies attributes this condition to allochtonous organic matter degradation processes, so the inland water carbon cycle should be linked to the input of organic carbon from the catchment. This work contributes to a bett
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
-
46. High-order unstructured spectral finite volume method for aerodynamic applications.
An implicit finite volume algorithm is developed for higher-order unstructured computation of inviscid compressible flows. The Spectral Finite Volume method is used to achieve high-order spatial discretization of the domain, coupled with a matrix-free LU-SGS algorithm to solve the linear systems arising from implicit time marching of the governing equations,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2010
-
47. High-order unstructured spectral finite volume method for aerodynamic applications.
An implicit finite volume algorithm is developed for higher-order unstructured computation of inviscid compressible flows. The Spectral Finite Volume method is used to achieve high-order spatial discretization of the domain, coupled with a matrix-free LU-SGS algorithm to solve the linear systems arising from implicit time marching of the governing equations,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2010
-
48. Diagnosis and Prospects for Development of Artisanal Fisheries in AÃude Pereira de Miranda, Petencoste-CE / DiagnÃstico e perspectiva para o desenvolvimento da pesca artesanal no aÃude Pereira de Miranda, Petencoste-CE
The understanding of complex realities of the fishing sector necessarily requires a deep knowledge of local dynamics, the logic underlying the decisions of fishermen and types of fishing. This process must necessarily precede any intervention or proposition for the development of the fishing activity. From a methodology based on an instrumental systemic natu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/07/2010