Browsing by Issue Date, starting with "2008-07"
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- Finding the region of origin for users of proverbs.Publication . Mendes, Armando B.; Funk, Matthias; Sousa, ÁureaProverbs are a form of popular knowledge present in every culture and society. During a long project for proverbial sentences identification a data base was being constructed. This data base collects, today, information about 25.000 idiomatic sentences including more than one thousand valid answers for proverbial sentences recognition surveys. In this work a project is described aimed to extract knowledge from this data base in order to comprehend better the inquiries about their level of proverbial recognition and the influence of the locations they have been living. [Introduction]
- The correct identification of the species going under the name Scizymenia dubyi (Schizymeniaceae, Rhodophyta) in the Azores, based on molecular and morphological evidences.Publication . Gabriel, Daniela; Schils, Tom; Neto, Ana I.; Fredericq, Suzanne
- Suporte à Decisão em Tecnologias de Comunicação : um caso com utilização de metodologias OLAP e Data MiningPublication . Alfaro, Paulo J.; Mendes, Armando B.; Ferreira, AiresEste artigo descreve um Sistema de Apoio à Decisão capaz de fornecer informação precisa e de qualidade sobre as comunicações na Electricidade Dos Açores (EDA). A decisão imediata a apoiar consistia em saber se as comunicações entre ilhas deveriam passar para tecnologias Voice over IP (VoIP), um serviço actualmente contratado a uma empresa de comunicações externa. Num projecto de business intelligence e usando tecnologias Microsoft SQL Server, o sistema lê e pré-processa ficheiros CSV de grande dimensão, recebidas da empresa de comunicações, combina esses dados com bases de dados existentes e apresenta os resultados sobre a forma de cubos multidimensionais. Posteriormente, este trabalho foi integrado num projecto de data minig, usando a metodologia CRISP-DM, tendo sido possível além de apoiar a decisão pretendida identificar situações ineficientes e mesmo de utilização fraudulenta de equipamentos de comunicação. Vários modelos foram construídos e disponibilizados a diferentes decisores para apoiar decisões estratégicas e de controlo.
- Effects of grass silage and soybean meal supplementation on milk production and milk fatty acid profiles of grazing dairy cowsPublication . Rego, Oldemiro Aguiar do; Regalo, S. M. M.; Rosa, Henrique José Duarte; Alves, Susana Paula A.; Borba, Alfredo Emílio Silveira de; Bessa, Rui José B.; Cabrita, Ana R. J.; Fonseca, A. J. M.The effects of supplementation with grass silage and replacement of some corn in the concentrate with soybean meal (SBM) on milk production, and milk fatty acid (FA) profiles were evaluated in a replicated 4 × 4 Latin square study using 16 dairy cows grazing pasture composed of ryegrass, Kentucky bluegrass, and white clover. Each experimental period lasted for 3 wk. The 4 dietary treatments were PC, 20 h of access to grazing pasture, supplemented with 6 kg/d of corn-based concentrate mixture (96% corn; C); PCSB, 20 h of access to grazing pasture, supplemented with 6 kg/d of corn- and SBM-based concentrate mixture (78% corn and 18% SBM; CSB); SC, 7 h of access to grazing pasture during the day and 13 h of ad libitum access to grass silage at night, supplemented with 6 kg/d of C concentrate; and SCSB, 7 h of access to grazing pasture during the day and 13 h of ad libitum access to grass silage at night, supplemented with 6 kg/d of CSB concentrate. The concentrate mixtures were offered twice each day in the milking parlor and were consumed completely. Grass silage supplementation reduced dietary crude protein and concentration of total sugars, and dietary SBM inclusion increased dietary crude protein concentration and decreased dietary starch concentration. Milk yield and energy-corrected milk were increased by SBM supplementation of cows with access to grass silage. Milk protein concentration was lower in cows offered grass silage, regardless of whether SBM was fed. Dietary SBM inclusion tended to increase milk fat concentration. Plasma urea N was reduced by silage feeding and increased by SBM supplementation. Supplementation with grass silage overnight could represent a useful strategy for periods of lower pasture availability. Dietary inclusion of SBM in solely grazing cows had no effects on milk production and composition, exacerbated the inefficient capture of dietary N, and increased diet cost. Grass silage supplementation affected milk FA profiles, increasing both the FA derived from de novo synthesis and those derived from rumen microbial biomass, and decreasing the sum of C18 FA (mostly derived from diet or from mobilization of adipose tissue reserves). Milk fat concentrations of conjugated linoleic acid cis-9, trans-11, vaccenic acid (18:1 trans-11), and linolenic acid (18:3n-3) were unaffected by grass silage supplementation, suggesting that partial replacement of pasture by unwilted grass silage does not compromise the dietary quality of milk fat for humans.
- Program of Inductive Methodologies of Behavior Appropriate in ClassPublication . Caldeira, Suzana NunesThis study is part of a wider research project greatly inspired by Rutter’s work. It involves a program of educational intervention centered on the practice of inductive methodologies of behavior appropriate in class, based on the introduction of variability and reciprocal modulation. The researcher (psychologist) assumed the role of facilitator before the group of teachers. Initially, the target group was a group of students exhibiting lack of discipline, but the focus quickly fell on the class as a social unit. Analysis of the percentage differences indicates improvement in student behavior. The teachers manifested satisfaction in having participated in the project.
- Exploitation of rocky intertidal grazers : population status and potential impacts on community structure and functioningPublication . Martins, Gustavo M.; Jenkins, Stuart R.; Hawkins, Stephen J.; Neto, Ana I.; Thompson, Richard C.A wide range of anthropogenic activities are impacting the ecology of coastal areas. Exploitation of marine resources is one such activity, which, through cascading trophic effects, can have influences well beyond that of the target species. We investigated the mid-rocky-shore community structure of the Azores archipelago, a seldom-studied habitat, where there is a local tradition of exploiting limpets, the main intertidal grazers. The limpet population structure differed among islands, and there was an inverse relationship between the abundance of larger limpets and the human population per coastal perimeter, but not the associated catch data. At small scales of resolution (quadrats), there was a negative relationship between the cover of algae and limpets and a positive relationship between barnacles and limpets. These relationships were also apparent at the larger scale of islands as a function of the gradient of exploitation. Our results show how natural habitat fragmentation may be useful where the experimental testing of a hypothesis is not possible, and provide evidence for the trophic cascading effects of limpet exploitation at landscape scales.
- Aerosol Optical Depth measurements in the Azores.Publication . Carvalho, Fernanda; Henriques, Diamantino; Fialho, PauloA preliminary analysis of AOD results from sun-photometer measurements collected at Jose Agostinho Observatory at Angra do Heroísmo (Terceira Island, the Azores) was presented. The observational period ranges from August 2004 to December 2007, using a SP02 sun-photometer at wavelengths 412, 500, 675, and 862 nm, coupled to a 2AXP sun-tracker. The sampling interval is 5 s and data is filtered for cloud contamination in a time window of 10 minutes. Most AOD 500 nm values are below 0.3, showing a small variation during the day; frequency distribution shows a typical right skew distribution. Alpha and beta Angstrom coefficients were also computed and analyzed in the same way. Alpha values are generally positive and lower than 4, while beta values are below 1.5. AOD results from the AERONET station at Horta Observatory (Faial Island, the Azores) were also used and compared with Angra data. AOD and Angstrom coefficients were also analyzed with wind results from the automatic weather station located at both observatories. Results show different wind distributions due to different exposures; however, systematic higher AOD values are found at Horta. The proximity of the two sites indicates that these differences are more likely due to different instruments and processing methods used.