Search

Your search keyword '"Federal District of Brazil"' showing total 3 results
Start Over Descriptor "Federal District of Brazil" Publication Year Range Last 10 years
3 results on '"Federal District of Brazil"'

1. Surveying mathematics teachers' knowledge of formative assessment : a study of teachers in the Federal District of Brazil

Author

Vallim Reis Camargo, Melise Maria and Ruthven, Kenneth

Subjects
371.102, Formative assessment, Mathematics Education, Federal District of Brazil, Secondary school, questionnaire
Abstract

The research presented in this dissertation involves a quantitative study of mathematics teachers' knowledge of formative assessment. Formative assessment is understood as a process in which both teachers and students actively become the agents of the process, responsible for their own knowledge and practice. In this process, formally gathered evidence is used to formulate feedback and inform decisions; and informal evidence (e.g. observation, conversations) is used to generate teacher and peer-feedback to improve learning (Hargreaves, 2005; Wiliam & Leahy, 2015). The focus of the study is on mathematics teachers in state secondary schools in the Brazilian Federal District. The research design employs survey methodology with a structured e-questionnaire. The questionnaire was designed based on six domains of knowledge extracted from existing research literature. The several piloting phases, and a field test conducted with a larger sample, demonstrate the validity and reliability of the instrument and provide information about mathematics teachers' knowledge of formative assessment. The evidence shows that teachers in the Federal District did relatively better in terms of interpreting evidence of students' learning and helping students to use assessment information. On the other hand, they had a relatively lower performance in terms of choosing/developing assessment methods (e.g. classroom activities, discussions) to elicit evidence of students' learning. The overall performance of teachers in the Federal District was lower than that of teachers sampled from the other states of Brazil. The original contribution of this research is methodological in the development, piloting and application of a new instrument to assess mathematics teachers' knowledge of formative assessment; and to knowledge in providing information and a unique insight into Brazilian mathematics teachers' knowledge of formative assessment. There are important implications for policy and practice, focussing on teachers' professional development with regards to formative assessment and clarifying Brazilian teachers' roles as assessors.

Published
2018
Full Text
View/download PDF

2. Hydrogeophysical Characterization of Fractured Aquifers for Groundwater Exploration in the Federal District of Brazil.

Author

Hussain, Yawar, Campos, José Eloi Guimarães, Borges, Welitom Rodrigues, Uagoda, Rogério Elias Soares, Hamza, Omar, and Havenith, Hans-Balder

Subjects
HYDROGEOLOGY, GROUNDWATER, AQUIFERS, ELECTRICAL resistivity, SOIL drying, BEDROCK
Abstract

The present study applies a geophysical approach to the Federal district of Brazil, a challenging hydrogeologic setting that requires improved investigation to enhance groundwater prospecting to meet the rising water demand. The geophysical characterization of a complex hard-rock aquifer sub-system was conducted using direct current (DC) electrical resistivity tomography (ERT) integrated with surface geological information. With a total of twenty-seven ERT profiles, the resistivity acquisition was carried out using a dipole-dipole array of electrodes with an inter-electrode spacing of 10 m. Based on resistivity ranges, the interpretation of the inverted resistivity values indicated a ground profile consisting of upper dry soil, saprolite, weathered, and fresh bedrock. Along with this layered subsurface stratigraphy, the approach allowed us to map the presence of significant hydrogeological features sharp contrasting anomalies that may suggest structural controls separating high-resistivity (≥7000 Ω m) and low-resistivity (<7000 Ω m) conducting zones in the uppermost 10 m of the ground. The assumed impacts of these features on groundwater development are discussed in light of the Brasilia aquifer settings. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

3. Hydrogeophysical Characterization of Fractured Aquifers for Groundwater Exploration in the Federal District of Brazil

Author

Yawar Hussain, José Eloi Guimarães Campos, Welitom Rodrigues Borges, Rogério Elias Soares Uagoda, Omar Hamza, and Hans-Balder Havenith

Subjects
dipole-dipole, fractures, saprolite, pumping well, Federal district of Brazil, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Abstract

The present study applies a geophysical approach to the Federal district of Brazil, a challenging hydrogeologic setting that requires improved investigation to enhance groundwater prospecting to meet the rising water demand. The geophysical characterization of a complex hard-rock aquifer sub-system was conducted using direct current (DC) electrical resistivity tomography (ERT) integrated with surface geological information. With a total of twenty-seven ERT profiles, the resistivity acquisition was carried out using a dipole-dipole array of electrodes with an inter-electrode spacing of 10 m. Based on resistivity ranges, the interpretation of the inverted resistivity values indicated a ground profile consisting of upper dry soil, saprolite, weathered, and fresh bedrock. Along with this layered subsurface stratigraphy, the approach allowed us to map the presence of significant hydrogeological features sharp contrasting anomalies that may suggest structural controls separating high-resistivity (≥7000 Ω m) and low-resistivity (

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results