Search

Your search keyword '"Federal District of Brazil"' showing total 6 results
Start Over Descriptor "Federal District of Brazil"
6 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

4. Genetic profile of Federal District of Brazil based on 18 STR autosomal loci.

Author

Dalton, Gustavo C., Maia, Flávia A.S., Mendes, Cláudia R.B.O., Pak, Hyung I., de Paula, Karla A.A., Trindade-Filho, Aluisio, and Oliveira, Silviene F.

Subjects
HUMAN population genetics, REPEATED sequence (Genetics), ALLELES, GENETIC markers, FORENSIC genetics, DNA fingerprinting, LOCUS (Genetics)
Abstract

Abstract: Allelic frequencies for 18 DNA STR autosomal markers (D16S539, D7S820, D13S317, D5S818, CSF1PO, TPOX, TH01, vWA, F13A01, FESFPS, F13B, LPL, Penta E, D18S51, D21S11, D3S1358, FGA and D8S1179) were obtained from a sample of unrelated individuals from the Federal District, in the Center-West of Brazil. [Copyright &y& Elsevier]

Published
2009
Full Text
View/download PDF

5. Distribuição espacial de populações de triatomíneos (Hemiptera: Reduviidae) em palmeiras da espécie Mauritia flexuosa no Distrito Federal, Brasil Spatial distribution of Triatominae populations (Hemiptera: Reduviidae) in Mauritia flexuosa palm trees in Federal District of Brazil

Author

Rodrigo Gurgel-Gonçalves, Marco Antônio Duarte, Eduardo Dias Ramalho, Alexandre Ramlo Torre Palma, Christine Agueda Romaña, and César Augusto Cuba-Cuba

Subjects
lcsh:Arctic medicine. Tropical medicine, Mauritia flexuosa, lcsh:RC955-962, Brasil, Distrito Federal, Federal District of Brazil, Rhodnius neglectus, Psammolestes tertius
Abstract

Para determinar e analisar a distribuição espacial de populações silvestres de triatomíneos no Distrito Federal, Brasil, foram amostradas 150 palmeiras da espécie Mauritia flexuosa em seis veredas de diferentes paisagens (silvestre, rural e periurbana) na estação chuvosa. Os triatomíneos foram identificados morfologicamente, separados por sexo e estadio ninfal e examinados para verificar infecção por Trypanosoma cruzi e Trypanosoma rangeli. Vinte e oito (18,6%) palmeiras estavam infestadas por Rhodnius neglectus e 14 (9,5%) por Psammolestes tertius. A freqüência dessas espécies em palmeiras com e sem ninhos foi significativamente diferente, sendo superior nas palmeiras com ninhos de aves e mamíferos na copa. O maior número médio de insetos/palmeira foi observado nas áreas rurais, com estimativas de até 838 insetos/hectare. A composição etária das espécies apresentou um padrão diferente, Rhodnius neglectus com predomínio de ninfas e Psammolestes tertius com predomínio de adultos, sendo que muitos ovos de Rhodnius neglectus foram coletados indicando um evento reprodutivo em fevereiro de 2003. Entre os ninhos encontrados nas palmeiras, o do pássaro Phacellodomus ruber (Furnariidae) apresentou as maiores abundâncias de triatomíneos, ocorrendo em 42% das palmeiras. A abundância relativa de Rhodnius neglectus e Psammolestes tertius foi maior em áreas rurais que possuíram maior número de ninhos nas palmeiras e menor densidade de palmeiras por hectare. Nenhum dos 96 triatomíneos examinados estava infectado por Trypanosoma cruzi ou Trypanosoma rangeli, apesar de encontrarmos infecção de Rhodnius neglectus por esses parasitas em estudos anteriores.To determine and analyze the distribution of Triatominae sylvatic populations in the Federal District of Brazil, 150 Mauritia flexuosa palm trees were sampled in six veredas of different landscapes (sylvatic, rural and peri-urban) in the rainy season. Triatomines were morphologically identified and grouped by sex and nymphal stage and were examined to verify infection by Trypanosoma cruzi and Trypanosoma rangeli. Twenty eight (18.6%) palm trees were infested by Rhodnius neglectus and fourteen (9.5%) by Psammolestes tertius. The frequency of Triatominae in palm trees with and without nests was significantly different being higher in palm trees with bird and mammal nests in the crown. The higher average number of insects/palm tree was observed in rural areas with estimates of up to 838 insects/hectare. The species age makeup presented a different pattern, with nymphs predominant for Rhodnius neglectus and adults predominant for Psammolestes tertius. Also, many Rhodnius neglectus eggs were collected, which indicates a reproductive event in February 2003. Among the nests found in palm trees, that of the Phacellodomus ruber (Furnariidae) bird had the greatest abundance of Triatominae, occurring on 42% of palm trees. The relative abundance of Rhodnius neglectus and Psammolestes tertius was greater in rural areas which contained higher number of nests in palm trees and lesser density of palms per hectare. None of the 96 triatomines examined were infected by Trypanosoma cruzi or Trypanosoma rangeli, despite our finding of Rhodnius neglectus infection by those parasites in former studies.

Published
2004

6. Spatial distribution of Triatominae populations (Hemiptera: Reduviidae) in Mauritia flexuosa palm trees in Federal District of Brazil

Author

César Augusto Cuba-Cuba, Rodrigo Gurgel-Gonçalves, Eduardo Dias Ramalho, Christine Agueda Romaña, Alexandre Ramlo Torre Palma, and Marco Antônio Duarte

Subjects
Microbiology (medical), Trypanosoma rangeli, lcsh:Arctic medicine. Tropical medicine, Mauritia flexuosa, lcsh:RC955-962, RC955-962, Zoology, Distrito Federal, Population density, Arctic medicine. Tropical medicine, Phacellodomus ruber, Nymph, Triatominae, Psammolestes tertius, Distrito Federal (Brasil), biology, Ecology, Brasil, biology.organism_classification, Federal District of Brazil, Infectious Diseases, Reduviidae, Buriti, Parasitology, Palm, Barbeiro (Triatomíneo), Rhodnius neglectus
Abstract

Para determinar e analisar a distribuição espacial de populações silvestres de triatomíneos no Distrito Federal, Brasil, foram amostradas 150 palmeiras da espécie Mauritia flexuosa em seis veredas de diferentes paisagens (silvestre, rural e periurbana) na estação chuvosa. Os triatomíneos foram identificados morfologicamente, separados por sexo e estadio ninfal e examinados para verificar infecção por Trypanosoma cruzi e Trypanosoma rangeli. Vinte e oito (18,6%) palmeiras estavam infestadas por Rhodnius neglectus e 14 (9,5%) por Psammolestes tertius. A freqüência dessas espécies em palmeiras com e sem ninhos foi significativamente diferente, sendo superior nas palmeiras com ninhos de aves e mamíferos na copa. O maior número médio de insetos/palmeira foi observado nas áreas rurais, com estimativas de até 838 insetos/hectare. A composição etária das espécies apresentou um padrão diferente, Rhodnius neglectus com predomínio de ninfas e Psammolestes tertius com predomínio de adultos, sendo que muitos ovos de Rhodnius neglectus foram coletados indicando um evento reprodutivo em fevereiro de 2003. Entre os ninhos encontrados nas palmeiras, o do pássaro Phacellodomus ruber (Furnariidae) apresentou as maiores abundâncias de triatomíneos, ocorrendo em 42% das palmeiras. A abundância relativa de Rhodnius neglectus e Psammolestes tertius foi maior em áreas rurais que possuíram maior número de ninhos nas palmeiras e menor densidade de palmeiras por hectare. Nenhum dos 96 triatomíneos examinados estava infectado por Trypanosoma cruzi ou Trypanosoma rangeli, apesar de encontrarmos infecção de Rhodnius neglectus por esses parasitas em estudos anteriores. To determine and analyze the distribution of Triatominae sylvatic populations in the Federal District of Brazil, 150 Mauritia flexuosa palm trees were sampled in six veredas of different landscapes (sylvatic, rural and peri-urban) in the rainy season. Triatomines were morphologically identified and grouped by sex and nymphal stage and were examined to verify infection by Trypanosoma cruzi and Trypanosoma rangeli. Twenty eight (18.6%) palm trees were infested by Rhodnius neglectus and fourteen (9.5%) by Psammolestes tertius. The frequency of Triatominae in palm trees with and without nests was significantly different being higher in palm trees with bird and mammal nests in the crown. The higher average number of insects/palm tree was observed in rural areas with estimates of up to 838 insects/hectare. The species age makeup presented a different pattern, with nymphs predominant for Rhodnius neglectus and adults predominant for Psammolestes tertius. Also, many Rhodnius neglectus eggs were collected, which indicates a reproductive event in February 2003. Among the nests found in palm trees, that of the Phacellodomus ruber (Furnariidae) bird had the greatest abundance of Triatominae, occurring on 42% of palm trees. The relative abundance of Rhodnius neglectus and Psammolestes tertius was greater in rural areas which contained higher number of nests in palm trees and lesser density of palms per hectare. None of the 96 triatomines examined were infected by Trypanosoma cruzi or Trypanosoma rangeli, despite our finding of Rhodnius neglectus infection by those parasites in former studies.

Published
2004

Catalog

Books, media, physical & digital resources
See catalog results