Encontrados 25 documentos, a visualizar página 1 de 3
Impact of different moodle course designs on students? Performance
Alves, Gustavo R.; Viegas, C.; Marques, Maria A.; Costa-Lobo, Cristina; Silva, António A.; Formanski, Francieli; Silva, Juarez Bento daThis work describes the impact of different teachers’ approaches in using Moodle, for supporting their courses, at the Polytechnic of Porto - School of Engineering. The study covers five different courses, from different degrees and different years, and includes a number of Moodle resources especially supporting laboratory classes. These and other active resources are particularly analyzed in order to evaluate ...
Student performance analysis under different moodle course designs
Alves, Gustavo R.; Viegas, C.; Marques, Maria A.; Silva, António A.; Costa-Lobo, Cristina; Formanski, Francieli; Silva, Juarez Bento daThis work extends a recent comparative study covering four different courses lectured at the Polytechnic of Porto - School of Engineering, in respect to the usage of a particular Learning Management System, i.e. Moodle, and its impact on students' results. A fifth course, which includes a number of resources especially supporting laboratory classes, is now added to the analysis. This particular course includes ...
Perfil sanitário apícola na zona controlada da Terra Quente Transmontana
Silva, António A.V.; Pires, Sância; Guedes, Helena; Durão, LuísO presente estudo teve como objectivo principal avaliar a prevalência de agentes patogénicos que acometem colónias de abelhas melíferas (Apis mellifera iberiensis) instaladas na Zona Controlada da Terra Quente (ZCTQ) do Nordeste Transmontano. A colheita de amostras foi efectuada no ano civil de 2011, em apiários instalados nos Concelhos de Vila Flor, Mirandela, Macedo de Cavaleiros, Alfândega de Fé e Torre de M...
The role of nonequilibrium thermo-mechanical statistics in modern technologies ...
Rodrigues,Clóves G.; Silva,Antônio A. P.; Silva,Carlos A. B.; Vasconcellos,Áurea R.; Ramos,J. Galvão; Luzzi,RobertoThe nowadays notable development of all the modern technology, fundamental for the progress and well being of world society, imposes a great deal of stress in the realm of basic Physics, more precisely on Thermo-Statistics. We do face situations in electronics and optoelectronics involving physical-chemical systems far-removed-from equilibrium, where ultrafast (in pico- and femto-second scale) and non-linear pr...
Síntese e avaliação da atividade fitotóxica de derivados da α-Santonina
Alvarenga,Elson S.; Barbosa,Luiz C. A.; Saliba,William A.; Arantes,Francisco F. P.; Demuner,Antônio J.; Silva,Antônio A.Mixtures of α-Santonin and various solvents were irradiated by either high or low pressure mercury lamps. The photochemical reactions afforded lumisantonin (11) (76% in acetonitrile), (3S,3aS,9bS)-3,6,6-trimethyl-3,3a,4,5-tetrahydronafto[1,2-b]furan-2,7(6H,9bH)dione (12) (100% in acetonitrile), 10α-acetoxy-3-oxo-1,7αH,6,11βH-guaia-4-en-6,12-olide (8) (26% in acetic acid), 10α-hydroxy-3-...
Síntese de novas fitotoxinas derivadas do 8-oxabiciclo[3.2.1]oct-6-en-3-ona
Barbosa,Luiz C. A.; Maltha,Célia R. A.; Demuner,Antônio J.; Ganen,Flávia R.; Silva,Antônio A. daThe [4+3] cycloaddition was utilized in order to prepare 8-oxabicyclo[3.2.1]oct-6-en-3-one (1) derivatives. The correspondent acetonide 6 was converted into several alcohols (11-16). Addition of aryllithium reagents to 6 resulted in 3-(2-fluorophenyl)-6,7-exo-isopropylidenedioxy -8-oxabicyclo[3.2.1]octan-3alpha-ol (11, 72%) and 3-(2,4-dimethoxyphenyl)-6,7-exo-isopropylidenedioxy-8-oxabicyclo[3.2.1]octan -3alpha...
Sorção e persistência da sorgoleona em um Latossolo Vermelho-Amarelo
Demuner,Antonio J.; Barbosa,Luiz C. A.; Chinelatto Jr.,Luiz S.; Reis,César; Silva,Antonio A.The root exudates produced by sorghum contain a biologically active constituent known as sorgoleone. The behavior of sorgoleone in a Red-Yellow Latosol was studied. The sorption model of sorgoleone in soil was better adjusted to the Freundlich equation, through the coefficients Kf (capacity of sorption) and 1/n (linearity of the isotherm). The persistence of sorgoleone in soil and its possible degradation were ...
Infant mortality: comparison between two birth cohorts from Southeast and North...
Ribeiro,Valdinar S; Silva,Antônio A M; Barbieri,Marco A; Bettiol,Heloisa; Aragão,Vânia M F; Coimbra,Liberata C; Alves,Maria T S S BOBJECTIVE: To obtain population estimates and profile risk factors for infant mortality in two birth cohorts and compare them among cities of different regions in Brazil. METHODS: In Ribeirão Preto, southeast Brazil, infant mortality was determined in a third of hospital live births (2,846 singleton deliveries) in 1994. In São Luís, northeast Brazil, data were obtained using systematic sampling of births strati...
Fatores associados à inadequação do uso da assistência pré-natal
Coimbra,Liberata C; Silva,Antônio A M; Mochel,Elba G; Alves,Maria T S S B; Ribeiro,Valdinar S; Aragão,Vânia M F; Bettiol,HeloisaOBJETIVO: Identificar fatores associados à inadequação do uso da assistência pré-natal em comunidade urbana. MÉTODOS: Foi realizado estudo transversal em amostra sistemática, estratificada por maternidades, de todos os nascimentos hospitalares do município de São Luís, MA, no período de março de 1997 a fevereiro de 1998. Foram avaliados indicadores socioeconômicos e demográficos, de saúde reprodutiva, morbidade...
Influência de chuva simulada após aplicação de herbicidas em pós-emergência, so...
Bastiani,Marcos L.R.; Silva,Antônio A.; Ferreira,Francisco A.; Cardoso,Antônio A.Dois experimentos foram conduzidos em 1995, em casa-de-vegetação do Departamento de Fitotecnia da Universidade Federal Viçosa, Viçosa-MG, com o objetivo de avaliar a influência da chuva após a aplicação de herbicidas, no controle de capim-marmelada (Brachiaria plantaginea L.) e picão-preto (Bidens pilosa L.), na cultura do milho (Zea mays L.), em solo com dois níveis de umidade. Foram aplicados o nicosulfuron e...
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