Browsing by Issue Date, starting with "2012-03"
Now showing 1 - 10 of 26
Results Per Page
Sort Options
- First record of Reticulitermes flavipes (Isoptera: Rhinotermitidae) from Terceira Island (Azores, Portugal)Publication . Austin, James W.; Szalanski, Allen L.; Myles, Timothy G.; Borges, Paulo A. V.; Nunes, Lina; Scheffrahn, Rudolf H.Reticulitermes flavipes, a Holarctic pestiferous subterranean termite species, particularly to structures and non-indigenous trees, is reported for the first time from Terceira Island, Azores, Portugal. The establishment of R. flavipes on Terceira Island likely represents more than one anthropogenic introduction with a high probability of military involvement.
- Um Estudo sobre Consumo de Derivados de Cannabis Sativa pelos Adolescentes do Ensino Secundário de Ponta DelgadaPublication . Raposo, Sara; Sousa, Áurea; Pereira, Hélder RochaA Cannabis sativa é a droga ilícita mais produzida e consumida na Europa, podendo ser considerada como "porta de entrada" para o consumo de outras drogas ilícitas. Embora seja uma "droga leve", é reconhecido o seu impacto nas alterações de memória, nas sensações e nos comportamentos. Neste trabalho, apresentam-se as principais conclusões obtidas, com base na aplicação de um questionário, com o objectivo de estimar a prevalência e determinar o perfil de consumo de Cannabis sativa por parte dos estudantes do Ensino Secundário do concelho de Ponta Delgada (Açores).
- Use of Arthropod Rarity for Area Prioritisation : Insights from the Azorean IslandsPublication . Fattorini, Simone; Cardoso, Pedro; Rigal, François; Borges, Paulo A. V.We investigated the conservation concern of Azorean forest fragments and the entire Terceira Island surface using arthropod species vulnerability as defined by the Kattan index, which is based on species rarity. Species rarity was evaluated according to geographical distribution (endemic vs. non endemic species), habitat specialization (distribution across biotopes) and population size (individuals collected in standardized samples). Geographical rarity was considered at ‘global’ scale (species endemic to the Azorean islands) and ‘regional’ scale (single island endemics). Measures of species vulnerability were combined into two indices of conservation concern for each forest fragment: (1) the Biodiversity Conservation Concern index, BCC, which reflects the average rarity score of the species present in a site, and (2) one proposed here and termed Biodiversity Conservation Weight, BCW, which reflects the sum of rarity scores of the same species assemblage. BCW was preferable to prioritise the areas with highest number of vulnerable species, whereas BCC helped the identification of areas with few, but highly threatened species due to a combination of different types of rarity. A novel approach is introduced in which BCC and BCW indices were also adapted to deal with probabilities of occurrence instead of presence/absence data. The new probabilistic indices, termed pBCC and pBCW, were applied to Terceira Island for which we modelled species distributions to reconstruct species occurrence with different degree of probability also in areas from which data were not available. The application of the probabilistic indices revealed that some island sectors occupied by secondary vegetation, and hence not included in the current set of protected areas, may in fact host some rare species. This result suggests that protecting marginal non-natural areas which are however reservoirs of vulnerable species may also be important, especially when areas with well preserved primary habitats are scarce.
- Synonymy of Orthomus susanae Serrano & Borges, 2009 with Orthomus annae (Donabauer, 2008) (Coleoptera: Carabidae)Publication . Serrano, Artur R. M.; Aguiar, Carlos A. S.; Boieiro, Mário; Borges, Paulo A. V.; Rego, Carla; Amorim, Isabel R.; Ribeiro, Sérvio P.; Pereira, Fernando E. A. P.[...]. Some time after the publication of their paper in Zootaxa, the authors found out that another Madeiran Orthomus species had been described one month earlier (Donabauer 2008). Taking in consideration the morphological characteristics of the specimens described in both papers and the coincidence of the type localities no doubts remained regarding the synonymy between the two species.
- Avaliação e comparação de partições numa perspectiva global dos resultadosPublication . Silva, Osvaldo; Bacelar-Nicolau, Helena; Nicolau, Fernando C.Neste trabalho, trata-se de uma metodologia global que tem vindo a ser desenvolvida para avaliar a qualidade dos resultados de uma Análise Classificatória, com base em índices de estabilidade, isolamento e homogeneidade das classes, entre outros. Em complemento, desenvolvemos também um método de visualização, que permite realçar as semelhanças e as diferenças entre as partições e entre os elementos pertencentes a essas partições. A aplicação da metodologia é ilustrada com base num conjunto de dados heterogéneos e de natureza complexa.
- Aerosol Measurements in the Free Troposphere at the North Atlantic Pico Mountain Observatory in the Azores.Publication . Mazzoleni, Claudio; Fialho, Paulo; Gorkowski, Kyle; Owen, Robert; Dziobak, Michael P.; Hueber, Jacques; Dzepina, Katja; Kramer, Louisa; Olsen, Seth C.; Kumar, Sumit; Helmig, DetlevPico is a small island (447 km2) in the archipelago of the Azores, Portugal, in the North Atlantic Ocean. The island has a very steep inactive volcano. An atmospheric monitoring station (Pico Mountain Observatory) was established close to the summit of the volcano by the late Dr. Richard Honrath and colleagues in 2001. The station, far from persistent local sources, is located near the northern cliff of the summit caldera at an altitude of 2225 meters. The station altitude is typically well above the boundary layer during summertime, when average marine boundary-layer heights are below 1200 meters and rarely exceed 1300 meters. Air masses reaching the station are often transported from North America and seldom from Europe or North Africa. The station’s uniqueness and significance lie in its location that allows study of the transport and evolution of gases and aerosols from North America in the free troposphere. Until recently, the focus was on the measurement and analysis of trace gases (ozone, carbon monoxide, non-methane hydrocarbons, nitrogen oxides) and light-absorbing aerosol (black carbon and iron oxide). Aerosol light attenuation has been measured at the site since 2001 using a seven-wavelengths aethalometer. An optical particle sizer was installed at the site in 2010 and has been running in parallel to the aethalometer for two seasons. A three-wavelength nephelometer, to measure the aerosol total- and back-scattering, and aerosol samplers for morphological and chemical analysis will be installed at the site in 2012. Our goal is to enhance the observatory monitoring capabilities for aerosol research. The objectives of this new research program are to: (a) assess background as well as specific event tropospheric aerosol properties, (b) compare aerosol and gases measurements with model outputs, and (c) use the data collected to provide satellite validation. This research is anticipated to enhance our understanding of the interactions between tropospheric aerosols, clouds, and climate by allowing, for example, the analysis of North American outflows and seasonal changes, the assessment of different source regions, the estimation of aerosol radiative forcing above marine clouds and in clear sky, and the study of the relative contribution of anthropogenic versus biomass burning emissions. In this poster we present a preliminary analysis of the black carbon and aerosol size data in conjunction with retroplume model analysis.
- The comparison of site spider «biodiversity quality» in Portuguese protected areasPublication . Feest, Alan; Cardoso, PedroSpiders at 23 Portuguese protected area sites were sampled (pitfall trapped) over 10-month periods. The data allowed for a “biodiversity quality” assessment consisting of the following indices: Species Richness, Biomass, Simpson Index, Species Conservation Value Index and Population Density. These “biodiversity quality” characteristics were reviewed for relative indication of site spider “biodiversity quality”. Spiders are proposed as a group of organisms that could be used to indicate part of the “biodiversity quality” of a site since they can be sampled in a standardised way and yield biodiversity indices for comparison spatially and temporally. The approach adopted in this paper allows a range of “biodiversity quality” indices to be measured for spiders in Portuguese protected areas which, in turn requires decisions from scientists, managers and politicians on what element or characteristic of biodiversity it is intended to be targeted.
- Primeira citação de Utetheisa pulchella (Linnaeus, 1758) para a ilha de São Miguel, Açores (Portugal) (Lepidoptera: Noctuidae)Publication . Vieira, VirgílioUtetheisa pulchella (Linnaeus, 1758) é citado pela primeira vez para a ilha de São Miguel, Açores. Os exemplares são provavelmente originários da região Atlanto-Mediterrânica. Notas sobre a sua distribuição mundial e ecologia são também apresentadas.
- Caracterização do Espírito Empreendedor com Recurso à Análise de DadosPublication . Cardoso, Inês; Sousa, Áurea; Lopes, Fernando Rosa RodriguesO empreendedorismo desempenha um papel fundamental no desenvolvimento económico de uma região. Este trabalho procura dar a conhecer as particularidades dos grupos de variáveis que caracterizam o espírito empreendedor, para melhor caracterizar e averiguar a existência, ou não, de um espírito empreendedor, no que concerne aos Técnicos de Diagnóstico e Terapêutica (TDT) dos hospitais dos Açores. Apresentam-se aqui as principais conclusões obtidas a partir da análise dos dados recolhidos, com base na aplicação de um questionário (devidamente testado e validado), aos TDT dos hospitais dos Açores.
- Dando asas à criatividade com a TI-NspirePublication . Teixeira, Ricardo Emanuel CunhaO aparecimento da tecnologia TI-Nspire veio alargar significativamente o leque de tarefas que podem ser propostas aos alunos e que permitem exemplificar não só a conexão entre as diferentes formas de representação dos conceitos (numérica, geométrica e algébrica), como também a conexão entre a Matemática e a realidade que nos rodeia. Se o uso da calculadora nos primeiros anos do Ensino Básico é controverso e carece de consenso por parte da comunidade educativa, o mesmo não se passa quando centramos a nossa atenção no 3º Ciclo do Ensino Básico e, em particular, no Ensino Secundário. A calculadora gráfica pode, de facto, constituir um poderoso instrumento quer para o professor que ensina Matemática, quer para os alunos, levando-os a aprender e a fazer Matemática. Para além de actividades claramente estruturadas e direccionadas, também é interessante apresentar aos alunos actividades que permitam uma maior liberdade de exploração. Neste seguimento, são exploradas diversas actividades desenvolvidas no âmbito da 1ª Edição do Mestrado em Matemática para Professores, da responsabilidade do Departamento de Matemática da Universidade dos Açores, que decorreu no primeiro semestre de 2011.
- «
- 1 (current)
- 2
- 3
- »