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Sökning: WFRF:(Westerberg Ulla)

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1.
  • Eliasson, Ingegärd, 1961-, et al. (författare)
  • Climate and behaviour in a Nordic city
  • 2007
  • Ingår i: LANDSCAPE AND URBAN PLANNING. - 0169-2046. ; 82:1-2, s. 72-84
  • Tidskriftsartikel (refereegranskat)abstract
    • Four urban public spaces, representing various designs and microclimates, were investigated in Gothenburg, Sweden, in order to estimate how weather and microclimate affect people in urban outdoor environments. The research strategy was both multidisciplinary and interdisciplinary and included scientists from three disciplines: architecture, climatology and psychology. The project is based on common case studies carried out during four seasons, including measurements of meteorological variables, interviews and observations of human activity at each place. Multiple regression analysis of meteorological and behavioural data showed that air temperature, wind speed and clearness index (cloud cover) have a significant influence on people's assessments of the weather, place perceptions and place-related attendance. The results support the arguments in favour of employing climate sensitive planning in future urban design and planning projects, as the physical component of a place can be designed to influence the site-specific microclimate and consequently people's place-related attendance, perceptions and emotions.
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  • Sandberg, Mats, et al. (författare)
  • Air flow pattern and pressure distribution within a street network in an urban area with a high building area density
  • 2006
  • Ingår i: The 6th International Conference on Urban Climate : Preprints. - 91-631-9000-1 ; s. 188-191
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • We report on the effect of the overall shape of a city on the flow within the street network. We start with a solid round block, aspect ratio, diameter/ height = 6. The block is subdivided into smaller blocks and step by step an increasing number of streets are introduced. In the wind tunnel visualization with helium filled soap bubbled was carried out for obtaining qualitative information about the flow pattern. The pressure distribution on the ground within the street network was recorded in 400 points. CFD predictions provided the overall flow balance; flow entering through the street portals, leaving through the exit street portals and the updraft.
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  • Wallhagen, Marita, 1979-, et al. (författare)
  • Framework for Detailed Comparison of Building Environmental Assessment Tools
  • 2013
  • Ingår i: Buildings. - Basel, Switzerland : MDPI AG. - 2075-5309. ; 3:1, s. 39-60
  • Tidskriftsartikel (refereegranskat)abstract
    • Understanding how Building Environmental Assessments Tools (BEATs) measure and define “environmental” building is of great interest to many stakeholders, but it is difficult to understand how BEATs relate to each other, as well as to make detailed and systematic tool comparisons. A framework for comparing BEATs is presented in the following which facilitates an understanding and comparison of similarities and differences in terms of structure, content, aggregation, and scope. The framework was tested by comparing three distinctly different assessment tools; LEED-NC v3, Code for Sustainable Homes (CSH), and EcoEffect. Illustrations of the hierarchical structure of the tools gave a clear overview of their structural differences. When using the framework, the analysis showed that all three tools treat issues related to the main assessment categories: Energy and Pollution, Indoor Environment, and Materials and Waste. However, the environmental issues addressed, and the parameters defining the object of study, differ and, subsequently, so do rating, results, categories, issues, input data, aggregation methodology, and weighting. This means that BEATs measure “environmental” building differently and push “environmental” design in different directions. Therefore, tool comparisons are important, and the framework can be used to make these comparisons in a more detailed and systematic way.
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  • Wallhagen, Marita, 1979-, et al. (författare)
  • Les outils de mesure de la durabilité des bâtiments : comparaison transnationale
  • 2008
  • Ingår i: Annales de la Recherche Urbaine. - Paris : Ministère de l'Écologie, de l'Énergie, du Développement durable et de l'aménagement du territoire. - 0180-930X. ; :105, s. 94-103
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • Les outils d'évaluation environnementale des bâtiments se développent rapidement dans de nombreux pays. Tous prétendent mesurer la qualité environnementale ou la durabilité des bâtiments, et donnent un maximum de points à ce qui est durable d'une manière ou d'une autre. Mais pour l'instant il n'y a pas de consensus sur le sens des mots « vert » ou « durables » en termes de critères et d'indicateurs. Que cherchent à mesurer les indicateurs existant? Trois outils d'évaluation ont été retenus, l'américain LEED-NC, le britannique Code for Sustainable Homes (CSH) et le suédois EcoEffect. Ils ont trois champs d'évaluation principale en commun : l'énergie, l'environnement intérieur, les matériaux et les déchets. En revanche les contenus sont différents. Ces outils ont été comparés quant à leur but, leur contenu, et leur manière d'agréger les items. Ils ont été testés sur un immeuble neuf de plusieurs étages. Les résultats de leur application à cet immeuble divergent, ce qui pose la question de la définition d'outils d'évaluation réellement pertinents.
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8.
  • Wallhagen, Marita, 1979-, et al. (författare)
  • What is a "green" building according to different assessment tools?
  • 2008
  • Ingår i: Proceedings of the 2008 World Sustainable Building Conference. Vol. 2. - 978-0-646-50372-1 ; s. 2618-2625
  • Konferensbidrag (refereegranskat)abstract
    • Environmental assessment tools for buildings are rapidly developing in many countries. All of them claim that they measure “greenness” or “sustainability” of buildings, i.e. if maximum scores are awarded a building is sustainable in some respect. But so far there is no consensus on the interpretation of “green” or “sustainable” in terms of criteria and indicators.This article explores if different tools point in different directions regarding “green” building design. It also investigates characteristics of assessment tools and consequences of different approaches.Three distinctly different assessment tools, LEED-NC, Code for Sustainable Homes (CSH) and EcoEffect have been selected. They have three core assessment areas in common, namely Energy, Indoor Environment and Materials & Waste. The content however is different.The tools have been compared with respect to aim, content and aggregation. They have been tested on a new multi storey residential building. Assessments within the core areas were compared. Measures to improve the overall judgement were explored. The diverging result raises the question how to design environmentally relevant and practically useful assessment tools for buildings.
9.
  • Westerberg, Göran, et al. (författare)
  • Labelling of polysaccharides using [11C]cyanogen bromide : In vivo and in vitro evaluation of 11C-hyaluronan uptake kinetics
  • 1995
  • Ingår i: Nuclear Medicine and Biology. - 0969-8051. ; 22:2, s. 251-256
  • Tidskriftsartikel (refereegranskat)abstract
    • A method for the 11C-labelling of polysaccharides in high specific radioactivity is described. Dextran and hyaluronan were treated with [11C]cyanogen bromide in aqueous solution at pH 11.5 to give 30-47% radiochemical yields with higher than 98% radiochemical purity in synthesis times of 24-26 min counted from the end of bombardment. Specific radioactivities at the end of synthesis ranged from 0.12 to 3.1 Ci/mumol. The biodistribution kinetics of [11C]hyaluronan injected intravenously was studied in rats by means of positron emission tomography, showing a rapid and displaceable uptake in liver. Uptake and displacement of [11C]hyaluronan was also demonstrated in cultured rat liver endothelial cells.
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