537 research outputs found
A TECNOLOGIA NA MATEM?TICA: O USO DE APLICATIVO NO ENSINO APRENDIZAGEM DAS OPERA??ES B?SICAS PARA ALUNOS COM DEFICI?NCIA INTELECTUAL DA ESCOLA MUNICIPAL SANTA ?NGELA ? JO?O PESSOA /PB
A tecnologia mostra-se cada vez mais presente e necess?ria para a sociedade, e abre novos caminhos
para as pr?ticas de ensino existente. Na ?rea da matem?tica, h? uma grande variedade de aplicativos,
softwares, jogos, e sites educativos dispon?veis na internet, que podem oferecer um aprendizado
significativo na constru??o do conhecimento. A educa??o inclusiva consiste em por fim a
desigualdade entre todos os alunose associada ao uso dos recursos tecnol?gicos adequados, pode
ajudar na constru??o de cidad?os conscientes, sem preconceitos, valorizando as diferen?as. Com o
uso da tecnologia podemos contribuir com uma melhor intera??oentrealunos e professores,
potencializando uma aprendizagem significativa e inovadora.A presente pesquisa visa analisar a
import?ncia do uso das tecnologias no ensino da Matem?tica, o processo evolutivo douso do
aplicativo no ensino das opera??es b?sicas nesta disciplina com os alunos que apresentam
defici?ncia intelectual da Escola Municipal de Ensino Fundamental Santa ?ngela, localizada no
munic?pio de Jo?o Pessoa ? PB. Explorar o uso de aplicativo para celulares e tablets no ensino das
opera??es b?sicas da matem?tica atrav?s do estudo da tabuada, de forma que ele possa contribuir no
processo de ensino-aprendizagem para os alunos com defici?ncia intelectual, viabilizando uma aula
l?dica condizente com a realidade do mundo globalizado de forma inclusiva para todos os alunos e
entender que o aluno com defici?ncia intelectual precisa de apoio diferenciado para que desenvolver
e potencializar suas habilidades e intera??o com toda a turma. Utilizaremos o aplicativo math
tabuada, escolhido por ser um aplicativo din?mico e de f?cil utiliza??o, que aborda as opera??es
matem?ticas. A inclus?o da tecnologia nas aulas de matem?tica, os alunos com defici?ncia
intelectual do ensino fundamental at? a educa??o de jovens e adultos, pode trazer uma aprendizagem
diferenciada e inclusiva para todos os alunos e tornar as aulas de matem?tica divertida e com
aprendizagem significativa para todos. Contamos com as contribui??es significativas do autor Jos?
Manuel de Moran, neste trabalho, onde podemos mostrar as expectativas que as tecnologias podem
trazer para o ensino, entre outros autores com pensamentos relevantes sobre os novos mecanismos
de aprendizagem com tecnologia e o l?dico num processo colaborativo para a constru??o de novos
saberes para uma educa??o inclusiva
Using AR interfaces to support industrial maintenance procedures
Industries are becoming more and more digitized to better implement intelligent and predictive maintenance support systems, aligned with Industry 4.0, which requires the progressive digitization of data collection and processes. Maintenance interventions, in an evolving technological context, are increasingly more complex and difficult for technicians to perform. In these environments, the use of Augmented Reality (AR) to help assist and guide in the maintenance operations, can accomplish a considerable gain in productivity. AR allows to superimpose information objects in real scenes, such as text, images, audiovisuals, and 2D/3D model animations, making available contextual information about the process, based on location and perspective. This paper describes the design and implementation of a prototype augmented reality application to support maintenance tasks inside a metal stamping production unit, that produces components for the automotive sector. It aims to train and guide personnel during the maintenance operations, and offering an extra channel to reach expert help.2411-78B2-7CDB | Pedro Miguel MoreiraN/
A common statement on anthropogenic hybridization of the European wildcat (Felis silvestris)
Preserving natural genetic diversity and ecological function of wild species is a central goal in conservation biology. As such, anthropogenic hybridization is considered a threat to wild populations, as it can lead to changes in the genetic makeup of wild species and even to the extinction of wild genomes. In European
wildcats, the genetic and ecological impacts of gene flow from domestic cats are mostly unknown at the species scale. However, in small and isolated populations, it is known to include genetic swamping of wild genomes. In this context, it is crucial to better understand the dynamics of hybridization across the species
range, to inform and implement management measures that maintain the genetic diversity and integrity of the European wildcat. In the present paper, we aim to provide an overview of the current scientific understanding of anthropogenic hybridization in European wildcats, to clarify important aspects regarding the evaluation of hybridization given the available methodologies, and to propose guidelines for management and research priorities.publishedVersio
Lowering the energy threshold in COSINE-100 dark matter searches
COSINE-100 is a dark matter detection experiment that uses NaI(Tl) crystal
detectors operating at the Yangyang underground laboratory in Korea since
September 2016. Its main goal is to test the annual modulation observed by the
DAMA/LIBRA experiment with the same target medium. Recently DAMA/LIBRA has
released data with an energy threshold lowered to 1 keV, and the persistent
annual modulation behavior is still observed at 9.5. By lowering the
energy threshold for electron recoils to 1 keV, COSINE-100 annual modulation
results can be compared to those of DAMA/LIBRA in a model-independent way.
Additionally, the event selection methods provide an access to a few to sub-GeV
dark matter particles using constant rate studies. In this article, we discuss
the COSINE-100 event selection algorithm, its validation, and efficiencies near
the threshold
Cognitive effects of the progressive exercise test in electricians wearing personal protective equipment.
Objetivo: verificar o efeito do esfor?o f?sico sobre as fun??es cognitivas de
trabalhadores eletricistas utilizando equipamento de prote??o individual
(EPI). M?todos: participaram 28 eletricistas que trabalhavam na constru??o,
manuten??o e opera??o de redes de distribui??o de energia. Todos do sexo
masculino, sadios e aptos para a pr?tica de exerc?cios f?sicos. As fun??es cognitivas foram representadas pelo teste de rea??o simples (TRS) e pelo n?vel
de vigil?ncia mental (NVM). O TRS e o NVM foram mensurados pr? e p?s-
-teste m?ximo progressivo, em esteira rolante, a 27 ?C de temperatura seca e
umidade relativa do ar de 64%. O teste consistiu em aumentos progressivos
na velocidade e na inclina??o da esteira at? a fadiga, com utiliza??o de EPI.
Resultados: a m?dia (desvio padr?o) do TRS n?o foi significativamente diferente antes, 227,8 (35,1) ms, e ap?s o exerc?cio, 220,6 (24,6) ms. O NVM foi
significativamente maior ap?s o exerc?cio em todas as situa??es: frequ?ncia
crescente ? 36,5 (5,1) Hz vs 39,5 (2,7) Hz, frequ?ncia decrescente ? 36,0 (5,2)
vs 39,0 (3,88) Hz, e frequ?ncia geral ? 36,2 (4,9) vs 39,2 (3,1) Hz. Conclus?o:
o exerc?cio progressivo m?ximo realizado com EPI n?o modificou o tempo de
rea??o simples e aumentou o n?vel de vigil?ncia mental de eletricistas.Objective: to verify the effects of physical effort on the cognitive functions
of electricians wearing personal protective equipment (PPE). Methods:
28 electricians participated. They worked on the construction, maintenance
and operation of electrical power distribution networks. All were male, healthy
and able to practice physical exercises. The cognitive functions were checked by
measuring simple reaction time (SRT) and mental alertness level (MAL). SRT
and MAL were measured before and after progressive maximal exercise, on a
treadmill, at 27 ?C dry temperature and 64% relative humidity, wearing PPE.
The test consisted of progressive increases in treadmill speed and incline, until
fatigue. Results: SRT mean difference was not significantly different before ?
227.8 (35.1) ms ? and after exercising ?220.6 (24.6) ms. MAL was significantly
higher after exercise in all situations: increasing frequency - 36.5 (5.1) Hz vs.
39.5 (2.7) Hz; decreasing frequency-36.0 (5.2) Hz vs. 39.0 (3.88) Hz; and general
frequency 36.2 (4.9) Hz vs. 39.2 (3.1) Hz. Conclusion: progressive maximal
exercise performed while wearing PPE caused no change in simple reaction
time, and increased electricians? mental alertness level
Removal of 60 Hz interference on the ECG signal using digital notch filter.
A interfer?ncia de 60 Hz AC pode ser um problema em qualquer situa??o de medi??o de biopotencial. A fonte dessa interfer?ncia ? o potencial AC da rede de alimenta??o de energia el?trica que est? inevitavelmente presente em qualquer situa??o cl?nica, ou para ilumina??o do ambiente ou como fonte de suprimento dos equipamentos de medi??o. A interfer?ncia causada pela rede el?trica, em 60 Hz, pode ser dif?cil de detectar visualmente em sinais tendo formas de onda n?o-regulares, como o EEG ou o EMG. N?o obstante, a interfer?ncia ? facilmente vis?vel quando presente em sinais com formas de onda bem definidas, como ? o caso do sinal de ECG (Eletrocardiograma). Em todo caso, o espectro de pot?ncia do sinal deve fornecer uma indica??o clara da presen?a da interfer?ncia da rede como um impulso em 60 Hz. Os harm?nicos, caso presentes, aparecem como impulsos adicionais em m?ltiplos inteiros da frequ?ncia fundamental. Neste trabalho ? demonstrada uma t?cnica de filtragem, empregando um filtro ?Notch? digital, o qual remove o artefato de 60 Hz do sinal de ECG, aumentando a confiabilidade do diagn?stico cl?nico a partir da interpreta??o do mesmo.60 Hz AC interference can be a problem in any biopotential measurement situation. The source
of such interference is the AC potential of the electrical power supply network that is
inevitably present in any clinical situation, either for lighting the environment or as a source
of supply for the measuring equipment. Electrical interference at 60 Hz can be difficult to
detect visually on signals having non-regular waveforms such as EEG or EMG. Nevertheless,
the interference is easily visible when present in signals with well-defined waveforms, such as
the ECG (Electrocardiogram) signal. In any case, the power spectrum of the signal shall
provide a clear indication of the presence of the network interference as a 60 Hz pulse. The
harmonics, if present, appear as additional pulses in integral multiples of the fundamental
frequency. In this work, a filtering technique is demonstrated, using a digital Notch filter,
which removes the 60 Hz artifact from the ECG signal, increasing the reliability of the clinical
diagnosis from its interpretation
Simulation of flash-butt welding process of a railway steel. Part 1 : residual stress analysis via FEM.
Trilhos longos, soldados pelo processo Flash Butt Welding (FBW), s?o a realidade das ferrovias brasileiras de m?dia e alta carga por eixo. Embora apresentem caracter?sticas desej?veis do ponto de vista do comportamento din?mico da via, as soldas s?o regi?es de descontinuidade estrutural e mec?nica onde se originam tens?es residuais, e que est?o associadas a falhas prematuras por fadiga. Simula??es num?ricas termomec?nicas, fisicamente n?o-lineares, no dom?nio do tempo, pelo M?todo dos Elementos Finitos (MEF), foram empregadas para avaliar o desenvolvimento de tens?es residuais originadas durante o processo de soldagem. Uma nova abordagem para a inclus?o do aporte de calor envolvido no processo ? proposta. Os resultados num?ricos s?o comparados a medidas experimentais de tens?es residuais superficiais e aspectos macrogr?ficos das juntas, incluindo largura da Zona Termicamente Afetada (ZTA) e dados de taxas de resfriamento. Os resultados mostram boa correla??o entre as an?lises num?ricas e medidas experimentais de tens?es residuais. Aspectos fundamentais relacionados ao desenvolvimento de tens?es residuais s?o esclarecidos a partir da correla??o entre an?lises num?rica e experimental. Ademais, verifica-se que os modelos computacionais podem ser utilizados na previs?o de pontos cr?ticos para nuclea??o de trincas por fadiga e/ou avaliar efeitos de vari?veis de processo sobre o campo de tens?es residuais.Long rails, welded by the Flash-Butt Welding (FBW) process, are the reality of the Brazilian railroads for medium and high axle loads. Although they present desirable characteristics concerning the dynamic behavior of the track, welded joints are regions of structural and mechanical discontinuity where high residual stresses originate, and, consequently, premature fatigue failures may take place. This paper employs the Finite Element Method (FEM) to carry out transient, physically non-linear thermo-mechanical analyses to evaluate residual stresses evolved in the welding process. A new approach is proposed to take into account the heat input involved in the process. The numerical results are compared to experimentally measured surface residual stresses, and to the macrographic joint aspects, including the HAZ width and cooling rate data. The results show a good correlation between the numerical and experimental measurements of residual stresses. Fundamental aspects related to the development of residual stresses are clarified, correlating numerical and experimental analyses. In addition, it is verified that the computational models can be used to predict critical crack nucleation points by fatigue, and/or to evaluate effects of process parameters on the residual stress field
Formation politics of the brazilian pedagogue : existence or absence.
Esta comunica??o apresenta os resultados parciais da
pesquisa integrada ?Configurando o lugar profissional
dos egressos do curso de Pedagogia? a qual tem como
objetivo geral investigar o perfil profissional dos egressos
do Curso, somados aos obtidos em duas anteriores j?
finalizadas, constru?das, estimuladas pela Resolu??o n?1
de 2006. Os resultados apontam que se tem uma pol?tica
educacional de forma??o do Pedagogo Professor e a
incerteza da exist?ncia de uma pol?tica educacional de
forma??o do Pedagogo considerado em sua dimens?o de
licenciatura e bachareladoThis communication presents the partial results of the
integrated research "Configuring the professional place of
the graduates of the Pedagogy course", whose general
objective is to investigate the professional profile of the
graduates of the Course, added to those obtained in two
previous ones already constructed, stimulated by
Resolution n?1 of 2006. The results point out that there is
an educational policy for the formation of the
Pedagogical Teacher and the uncertainty of the existence
of an educational policy for Pedagogical education
considered in its bachelor's and bachelor's degre
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