Results 21 to 30 of about 34,222,008 (183)

A New Switchable Zr12 Oxocluster Based Large Pore Metal–Organic Framework Functionalized With Spin Crossover Complexes for Acetic Acid Colorimetric Sensing

open access: yesAngewandte Chemie, EarlyView.
We present here (1)⊂MIP‐216(Zr), a new hybrid material composed of an FeII spin crossover complex (1) loaded in the pores of a new hydrophobic metal–organic framework (MIP‐216(Zr), that presents a high affinity toward acetic acid and acts as a highly sensitive colorimetric sensor of acetic acid vapor due to a spin state switching of the encapsulated ...
Emmelyne Cuza   +8 more
wiley   +2 more sources

Influência da escala de cores na avaliação qualitativa em cintigrafia de perfusão cerebral

open access: yesSaúde & Tecnologia, 2018
Introdução – A cintigrafia de perfusão cerebral (CPC) é uma técnica imagiológica que permite a obtenção de imagens da biodistribuição de um radiofármaco, cuja captação reflete a perfusão cerebral regional.
Wilson Santos   +3 more
doaj   +1 more source

Matemática e Física em experiências de Robótica Livre

open access: yesTexto Livre: Linguagem e Tecnologia, 2021
Neste presente artigo, abordamos a aprendizagem de Matemática e Física por intermédio da Robótica Educacional em uma perspectiva livre, com a utilização de materiais livres, para que os estudantes criassem seus conhecimentos a partir da ideia do ...
Marcelo Pires da Silva   +1 more
doaj   +1 more source

Una propuesta de aula virtual para la mejora de procesos de aprendizaje y de enseñanza

open access: yesAlexandria, 2020
O trabalho mostra os resultados apontados pelos alunos que concluíram o curso Análise Matemática I da Faculdade de Engenharia numa sala de aula virtual com a modalidade b-learning, a partir do projeto de pesquisa, "A Sala de Aula Virtual e as redes ...
Victoria Regina Ornass   +2 more
doaj   +1 more source

Impact of soil water regimes and partial root-zone drying in field-grown papaya in semi-arid conditions

open access: yesScientific Reports, 2021
This study aimed to evaluate in the papaya Tainung genotype, the effects of partial root-zone drying (PRD) technique on soil water regimes by using different frequencies of shifting irrigation-side of plant row and the effects of PRD technique on (1 ...
Dionei Lima Santos   +9 more
doaj   +1 more source

Non-invasive analysis of faience necklace beads and scarabs from Late Bronze Age and Early Iron Age necropolises in southern Portugal

open access: yesTrabajos de Prehistoria
In this work, non-invasive techniques (XRD and microPIXE) were used to study 14 necklace beads associated with human inhumations from the Late Bronze Age (10th-9th century BC) hypogea of Monte da Ramada 1 (Aljustrel), from the Early Iron Age (7th-6th ...
António M. Monge Soares   +6 more
doaj   +1 more source

A MATEMÁTICA E OS MATEMÁTICOS DO INSTITUTO TECNOLÓGICO DA AERONÁUTICA

open access: yesRevista Brasileira de História da Matemática, 2020
O Instituto Tecnológico de Aeronáutica foi criado com a missão de promover, por meio da educação, do ensino, da pesquisa e da extensão, o progresso das ciências e das tecnologias relacionadas com o Campo Aeroespacial e a formação de profissionais de ...
Henrique Marins de Carvalho
doaj   +1 more source

Mapping the motor cortex with BOLD functional magnetic resonance imaging

open access: yesSaúde & Tecnologia, 2015
Introduction – Functional magnetic resonance imaging (fMRI) is currently an essential tool for the study of human brain function, both in healthy volunteers and in patients suffering from multiple types of pathology.
Patrícia R. Nunes   +2 more
doaj   +1 more source

Design of a Parallel Robotic Manipulator Using Evolutionary Computing

open access: yesInternational Journal of Advanced Robotic Systems, 2012
In this paper the kinematic design of a 6-dof parallel robotic manipulator is analysed. Firstly, the condition number of the inverse kinematic jacobian is considered as the objective function, measuring the manipulator's dexterity and a genetic algorithm
António M. Lopes   +2 more
doaj   +1 more source

Structural connectivity of the brain: differences between a normal brain and a brain with pathology

open access: yesSaúde & Tecnologia, 2015
Understanding the large-scale structural network formed by neurons is a major challenge in neuroscience. In this study we analyzed the structural connectivity of the human brain in 22 healthy subjects and in two patients with post-traumatic epilepsy.
Carmen Ferra   +4 more
doaj   +1 more source

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