20 research outputs found
Durability of interior renderings in schools: optimization of envelope insulation for mitigation of mould growth risk
A high standard education is, nowadays, a clear objective for anymodern society. In Portugal, the retrofit of educational buildings has an enormousrelevance as demonstrated by the Program for Retrofit and Upgrade of HighSchools. Educational buildings specific characteristics such as high occupancyrates and high amount of time children spend in classrooms make them a specialcase compared to other buildings. Mould growth on envelope surfaces is frequentlyobserved in these buildings, reducing the expected durability of renderingsand coatings. The present work consisted of two main lines of research: one ofsimulation and other of optimization. The simulation part included modelling ofInterior Surfaces Temperature, Indoor Air Temperature and Relative Humidityvariation, before and after a hypothetical retrofit process. Optimization techniqueswere applied in the definition of insulation thickness to be numerically tested in theafter retrofit scenario. The objective was to minimise insulation thickness ineach building element of the envelope. The constraints were derived from thecontrol of surface temperature values that would result in mould growth risk
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The Effect of Rainfall on Columbia Milkvetch Toxicity
Daily precipitation patterns were compared to the variation in miserotoxin concentration of Columbia milkvetch (timber milkvetch) sampled sequentially during the spring and summer of 1973 and 1974. On rough fescue grasslands, the substantial increase in rainfall during the April-to-August period of 1974 not only extended toxicity intervals but also increased miserotoxin levels during the prebud growth stage. A large-scale rain storm induced miserotoxin synthesis during the pod stage. Greater soil moisture-holding capacity at one grassland experimental plot prevented a rapid decline in miserotoxin levels when drought conditions developed. In contrast, the toxicity trends on Douglasfir forest sites did not show a response to variations in precipitation and toxin differences between local sites were not significant. Consequently, a predictability equation was developed for Columbia milkvetch toxicity in Douglasfir forests on Gray Luvisolic soils.This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202
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