Buscar
Mostrando ítems 51-60 de 705
Ionospheric high frequency wave propagation using different IRI hmF2 and foF2 models
(Elsevier, 2019-12)
High frequency (HF) electromagnetic wave propagation is commonly used in long-distance communication and detection. The ionosphere is a highly variable medium affecting this propagation. However, mean climatological ...
Internet em questão: ensino superior a distância e as tecnologias de informação e comunicação no processo de ensino-aprendizagem
(Universidade Federal de Santa MariaBrasilUFSMCentro de Artes e Letras, 2014-07-11)
The objective of this paper is to analyze the interaction of students graduating from degree in Rural Development (Plageder) by means of information and communication in the teaching-learning in virtual learning environment ...
Efficient planning of crude oil supplies through long-distance pipelines
(Pergamon-Elsevier Science Ltd, 2019-04)
This work introduces a mixed-integer nonlinear programming (MINLP) formulation for the efficient planning of crude oil supplies to a major refinery, through a long-distance pipeline. The proposed approach combines the ...
Isotopic, trace element and nutrient characterization of coastal waters from Ubatuba inner shelf area, south-eastern Brazil
(ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2008)
Stable isotopes, tritium, radium isotopes, radon, trace elements and nutrients data were collected during two sampling campaigns in the Ubatuba coastal area (south-eastern Brazil) with the aim of investigating submarine ...
O curso de formação de formadores da segurança pública na rede nacional de educação a distância: um estudo de caso no telecentro de SergipeThe training course for trainers of public safety in the national network of distance education: a case study in the telecentre Sergipe
(Universidade Federal de SergipePós-Graduação em EducaçãoBRUFS, 2017)
Formação de professores na modalidade a distância: itinerários da Licenciatura em Geografia na UFRN
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM GEOGRAFIA - GEOPROF - CERES, 2018-12-18)
The approaches about teacher education through the Distance Learning become relevant today,
in view of the social barriers of acceptability that still exist regarding quality of the professional
graduated by this modality ...
Open clusters in the Third Galactic Quadrant. III: alleged binary clusters
(EDP Sciences, 2010-03)
Aims. We aim to determine accurate distances and ages of eight open clusters in order to: (1) assess their possible binarity (2) provide probes to trace the structure of the Third Galactic Quadrant.
Methods. Cluster ...
The challenges of containing SARS-CoV-2 via test-trace-and-isolate
(Nature, 2021)
Without a cure, vaccine, or proven long-term immunity against SARS-CoV-2, test-trace-andisolate
(TTI) strategies present a promising tool to contain its spread. For any TTI strategy,
however, mitigation is challenged by ...