Pi Paper
Mostrando 1-12 de 57 artigos, teses e dissertações.
-
1. Forma urbana e poluição atmosférica: impactos na cidade do Rio de Janeiro
Resumo Cidades crescem em importância como polos de concentração de população, assim como em seu papel potencial como fontes de poluição atmosférica. Este artigo investiga possíveis impactos de aspectos da forma urbana nas concentrações desses contaminantes. Dado que esse é um tema ainda incipiente em estudos urbanos no Brasil, a pesquisa traz um
urbe, Rev. Bras. Gest. Urbana. Publicado em: 21/11/2019
-
2. Academic English Proficiency Assessment Using a Computerized Adaptive Test
RESUMO Este trabalho descreve as etapas de transformação de um exame de proficiência em inglês acadêmico, aplicado via lápis-e-papel, em um teste adaptativo informatizado (TAI-PI) baseado em um modelo da Teoria de Resposta ao Item (TRI). O exame é com- posto por itens de múltipla escolha administrados segundo o método de Medida de Probabilidade Admi
TEMA (São Carlos). Publicado em: 16/09/2019
-
3. Electromagnetic Core Analysis of a DFIG State-Feedback Power Controller
Abstract The energy demand by modern society grows every day that allied with sustainable development requires the use of alternative sources in the new energy matrix. In this context, the wind energy as source by using a doubly-fed induction generator stands out due to its operational savings but still faces some conflicts in its power control. This paper p
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 12/09/2019
-
4. Avaliação do potencial reativo de adições de resíduos de blocos de cerâmica vermelha e de concreto cominuído de RCD em matriz cimentícia
Resumo Neste trabalho avaliou-se o potencial reativo de adições de resíduo de cerâmica vermelha (RCV) e de concreto de RCD, além de fíler calcário para referência. Avaliou-se o potencial pozolânico das adições por índice de atividade pozolânica (IAP) com cal, índice de desempenho (ID) com cimento, teor de hidróxido de cálcio fixado no Chapell
Cerâmica. Publicado em: 15/08/2019
-
5. DAI-ME AGÔ (LICENÇA) PARA FALAR DE SABERES TRADICIONAIS DE MATRIZ AFRICANA NO ENSINO DE QUÍMICA
This paper presents the results of a participant research. We represent the science class-room as conditioned by the heterogeneity of the identities constituting it from positions that are defined and legitimized by our social structure. We present a pedagogical intervention (PI) entitled “Traditional knowledge of African-matrix peoples and communities”.
Quím. Nova. Publicado em: 18/07/2019
-
6. Body as Danger: Gender, Race and Body in Toni Morrison's Sula
This paper aims at tackling the question as to why Sula as a social nonconformist and sexual dissident ends up as an avatar of evil, a powerless victim of witch-hunt and eventually a scapegoat for the decline and misfortunes of her community. To facilitate this critical task, this paper shall first apply Michel Foucault's genealogy of "the body as the bearer
Ilha Desterro. Publicado em: 2015-08
-
7. Rate-equations based model for the 2D-0D direct channel in quantum dot lasers under CW and gain-switching
Direct capture of carriers from the wetting layer to the most confined states is discussed in this paper. This channel for carrier scattering was recently used to fit typical P-I curves of quantum dot lasers. Here new numerical expressions for the escape times accounting for the carriers added by the direct channel are introduced and evaluated, and insights
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
-
8. Wave passage effects on the seismic response of a maglev vehicle moving on multi-span guideway
As a seismic wave travels along the separate supports of an extended structure, the structure is subjected to multiple-support excitation due to seismic wave propagation. Considering the seismic wave passage effect, this paper describes seismic analysis of a maglev vehicle moving on a multiply supported gudieway. The guideway system is modeled as a series of
Lat. Am. j. solids struct.. Publicado em: 2013-09
-
9. Relationship of lambda and overshoot of step response for a direct synthesis PI controller
The direct synthesis (DS) tuning method is a model-based method for a feedback controller. The main principle of this method is to obtain the controller settings based on a predetermined desired closed loop response. The main advantage is that there is only one parameter to be adjusted, which is lambda (λ), the speed of the desired closed loop response. The
Braz. J. Chem. Eng.. Publicado em: 2012-09
-
10. Control of strain in a flexible beam using Ni-Ti-Cu shape memory alloy wire actuators
In this paper the development of an experimental test bench to analyze and control the strain of a flexible aluminum beam subjected to external disturbances is described. In the proposed platform, strain-gauges are used to measure the strain of the beam in a single cantilever mode while Ni-Ti-Cu Shape Memory Alloy (SMA) wires are used as force actuators. Dat
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
-
11. Mutagênese ambiental: estabelecimento de valores de referência para manguezais da Baía de Ilha Grande / Environmental mutagenesis: establishment of reference valves for mangroves of Ilha Grande Bay
Environmental studies have shown that substances generated by anthropogenic processes can cause adverse effects by interfering with the ecosystem natural balance. Mangroves perform essential functions in biological cycles and are Permanent Protection Area in Brazil. Unfortunately, they are being degraded above its support limit, leading to a reduction of the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
-
12. Diversity of sandflies (Psychodidae: Phlebotominae) captured in sandstone caves from Central Amazonia, Brazil
In the present paper we describe the diversity of phlebotomine sandflies collected in three sandstone caves in the municipality of Presidente Figueiredo, state of Amazonas, Brazil. The phlebotomines were captured during 2006 with CDC light traps. Guano samples from inside the Gruta Refúgio do Maruaga were collected to investigate the presence of immature sp
Memórias do Instituto Oswaldo Cruz. Publicado em: 2011-05