Extratos de plantas aromáticas no controle do oídio em plantas de pimentão.

Objetivou-se com o trabalho avaliar a eficácia de extratos aquosos de plantas aromáticas no controle do oídio em pimentão.Resumo

Óleos essenciais no controle do oídio em pimentão.

Objetivou-se com este trabalho avaliar a eficiência de óleos essenciais no controle do oídio em pimentão

Ocorrência do complexo da queima das folhas em diferentes fases de desenvolvimento da cenoura.

Com o objetivo de avaliar a frequência da ocorrência destes três patógenos (Alternaria dauci, Cercospora carotae e Xanthomonas hortorum pv. carotae) em diferentes fases de desenvolvimento na cultura no campo, foram coletadas 50 folhas ao acaso com sistomas da doença, aos 63, 78 e 93 dias após o plantio.Resumo 1266

Intelligent machining methods for Ti6Al4V: a review

Digital manufacturing is a necessity to establishing a roadmap for the future manufacturing systems projected for the fourth industrial revolution. Intelligent features such as behavior prediction, decision- making abilities, and failure detection can be integrated into machining systems with computational methods and intelligent algorithms. This review reports on techniques for Ti6Al4V machining process modeling, among them numerical modeling with finite element method (FEM) and artificial intelligence- based models using artificial neural networks (ANN) and fuzzy logic (FL). These methods are intrinsically intelligent due to their ability to predict machining response variables. In the context of this review, digital image processing (DIP) emerges as a technique to analyze and quantify the machining response (digitization) in the real machining process, often used to validate and (or) introduce data in the modeling techniques enumerated above. The widespread use of these techniques in the future will be crucial for the development of the forthcoming machining systems as they provide data about the machining process, allow its interpretation and quantification in terms of useful information for process modelling and optimization, which will create machining systems less dependent on direct human intervention.publishe

Influência da idade nos parâmetros de fractura do betão auto-compactável reforçado com fibras de aço

No presente trabalho apresenta-se a estratégia numérica desenvolvida para a determinação das propriedades de fractura do betão auto-compactável reforçado com fibras de aço de distintas idades. Para tal foram utilizados resultados obtidos num programa experimental e um software de análise não linear material baseado nas técnicas dos elementos finitos, sendo a fendilhação simulada por intermédio de um modelo de fendas discretas.FEDER - "PABERFIA - Painéis sandwich prefabricados de betão reforçado com fibras”. Fundação para a Ciência e Tecnologia (FCT) -"PABERFIA - Painéis sandwich prefabricados de betão reforçado com fibras”. Prégaia. Civitest. Secil. Bettor MBT. Bekaert. Comital

Resistência de progênies de cenoura à queima-das-folhas.

O objetivo deste trabalho foi avaliar a resistência de progênies experimentais de cenoura à queima-das-folhas

Citronella essential oil in the control and activation of coffee plants defense response against rust and brown eye spot.

Objetivou-se avaliar o óleo essencial de citronela no controle da ferrugem e cercosporiose e na ativação de respostas de defesa em cafeeiro

Management oriented mathematical modelling of Ria Formosa (South Portugal)

1 - Ria Formosa is a large (c.a. 100 km2) mesotidal lagoon system included in a Natural Park, with large intertidal areas and several uses such as fisheries, aquaculture, tourism and nature conservation. Its watersheds cover an area of approximately 864 km2, with a hydrographic network of small and, mostly, ephemeral rivers. 2 - The Soil and Water Assessment Tool (SWAT model) has been applied to the catchments in order to simulate water discharges to Ria Formosa, providing forcing to a two-dimensional vertically integrated model, implemented with EcoDynamo – an object oriented modelling software – including hydrodynamics, water column, sediment biogeochemistry and growth models for some important benthic species. 3 - The main objectives of this work are to: (i) Analyse model performance in the light of available data; (ii) Evaluate the effects of dredging operations and changes in biomass densities of cultivated clams, on lagoon biogeochemistry and water quality. 4 - This work is part of a larger project where many possible management scenarios are being analysed following concerns expressed by the project end-users – Ria Formosa Natural Park authority. 5 - Results obtained so far suggest that bivalve rearing areas are probably being exploited close to their carrying capacity. Furthermore, it is apparent that some improvement on water quality could be achieved by reducing bivalve densities, without significant losses of harvest yields

Crustal growth and deformational processes in the northern

The aim of this article is to present a compilation of available information on the Évora Massif based on structural mapping, whole-rock geochemistry, recognition of metamorphic mineral assemblages, and geothermobarometry. In our view, transcurrent movements responsible for strong orogen-parallel stretching were dominant and had a major role in the geodynamic evolution of this part of Ossa-Morena zone (southwest Iberian Massif). Cadomian and Variscan orogenic events separated by a period of intense rifting were the cause for the composite distribution of zones with contrasting metamorphic paths, the structural complexity, the variety of lithological associations, and the sequence of deformation events and magmatism. The proposed geodynamic reconstruction for this segment of the northern Gondwana continental margin includes three main stages in chronological order: (1) Neoproterozoic accretion and continental magmatic arc developing, dismantling, and reworking, followed by late-“orogenic” magmatism; (2) Lower Paleozoic crustal thinning, block tilting, and mantle upwelling, induced by generalized rifting, leading to the formation of marine basins with carbonate platform sediments and thick accumulations of volcaniclastic and terrigenous sediments, contemporaneous with normal and enriched mid-oceanic ridge basalt–type magmatism; and (3) Upper Paleozoic transpressional orogenesis resulting from obliquity of convergence and the geometry of the involved blocks. The third stage includes the tectonic inversion of Lower Paleozoic basins, crustal thickening, the exhumation of high- to medium-pressure rocks and partial exhumation of high-grade metamorphic lithologies (controlled by local transtension and major detachments), the formation of synorogenic basins fi lled with volcanicsedimentary sequences, and fi nally, the emplacement of late Variscan granodiorites and granites