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- Dyrssen, Catharina, 1949, et al.
(författare)
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Bullerbyn - en tvångströja.
- 2004
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Ingår i: Arkitekten. ; 2004:12, s. 42-43
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 5. |
- Hellström, Björn, 1959-
(författare)
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Noise design : Architectural Modelling and the Aesthetics of Urban Acoustic Spase
- 2003
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Noise Design takes up a structural approach to sound issuesin general and more particularly to urban acoustic space. Whilemost recent research efforts in the field adopt a defensiveattitude by seeking to protect people from sounds, this bookcelebrates our constructive and creative relations with thesound world and develops methods to manage sounds as mediatorsof qualitative information. The title is chosen to oppose thecommon meaning of noise, as‘unwanted sound’, whichimplies a denial of all its immanent qualities as well as itscontexts and uses. The thesis explores the concept oftransparent and fluid space as a central principle forarchitectural conception. Urban acoustic space is seen astransient and immaterial, making public and private spaces lesspredictable, less monotonous.The thesis comprises a Prologue, which provides an overviewof the subject, and three essays: On Sound Design, On SoundEffect and On Sound Identity. The first essay derives mainlyfrom the fieldof music, and discusses the internal,morphological properties of sound as well as aspects ofperception and notation. The second and third essays originatefrom theories and methods that are developed at the CressonInstitute in Grenoble, focusing on the external properties ofsounds, mainly regarding spatial, social and perceptualcriteria. Each essay comprises a descriptive and operativesection, whereby the former emphasises the exploration andqualification of conceptual tools, while the latter examinesthe concepts in different types of models. Thus, the essays arebased upon a research-by-design methodology, revealing theclose connection between analysis and creation towards design,and including, for example, the sound art installations Tiksand Tiger, which are presented in the text body and on theattached CD.Keywords:architecture, music, aesthetics, sound art,acoustic space, sound design, sound effect, sound identity,sound morphology, graphic notation, diagram, sampling culture,acousmatics, sound-object, metabolic effect, ubiquity,synecdoche, schizophonia, gesture,listening-hearing-attending-understanding, Cresson,Jean-François Augoyard, Pascal Amphoux, Tiks, Tiger.
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- Hellström, Bengt, et al.
(författare)
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The impact of optical and thermal properties on the performance of flat plate solar collectors
- 2003
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Ingår i: Renewable Energy. - 0960-1481. ; 28:3, s. 331-344
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Tidskriftsartikel (refereegranskat)abstract
- The impact of the optical properties on the annual performance of flat plate collectors in a Swedish climate has been estimated with the MINSUN program. The collector parameters were determined with a theoretically based calculation program verified from laboratory measurements. The importance of changes in solar absorptance and thermal emittance of the absorber, the addition of a teflon film or a teflon honeycomb, antireflection treatment of the, cover glazing and combinations of these improvements were investigated. The results show that several improvements can be achieved for solar thermal absorbers. A combined increase in absorptance from 0.95 to 0.97 and a decrease in emittance from 0.10 to 0.05 increase the annual performance with 6.7% at 50 degreesC operating temperature. The increase in performance by installing a teflon film as second glazing was estimated to 5.6% at 50 degreesC. If instead a teflon honeycomb is installed, a twice as high performance increase is obtained, 12.1 %. Antireflection treatment of the cover glazing increases the annual output with 6.5% at 50 degreesC. A combination of absorber improvements together with a teflon honeycomb and an antireflection treated glazing results in a total increase of 24.6% at 50 degreesC. Including external booster reflectors increases the expected annual output at 50 degreesC to 19.9-29.4% depending on reflector material. (C) 2002 Elsevier Science Ltd. All rights reserved.
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| 8. |
- Hellström, Cecilia, et al.
(författare)
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Spatial analysis of extreme precipitation in Sweden 1961-2000
- 2004
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Ingår i: Ambio. - 0044-7447. ; 33:4-5, s. 187-192
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Tidskriftsartikel (refereegranskat)abstract
- Extreme daily precipitation in Sweden for the years 19612000 is analyzed with respect to spatial scale, regional variations and associated weather types. Correlograms based on a lag distance of 30 km estimated the spatial scale of variation of the annual mean precipitation, the 99(th) percentile of daily precipitation and the average of annual maximum daily precipitation to 100 km, 60-100 km and 40-70 km, respectively. Regions of correlation with respect to precipitation at 82 stations during days of extreme events are identified through Maximum-Likelihood Factor Analysis. Eleven factors are found to provide the optimum factor solution. Weather types for the days of extreme events are determined by an objective classification scheme, based on daily sea level pressure, which is modified by subjective inclusion of fronts. In total, 63% of the extreme events occurred during cyclonic weather types, 32% during frontal, 3% during directional and 2% during anticyclonic types. The frequency of the weather types during extreme events varied between the regions however.
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- Mattsson, Sören, et al.
(författare)
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Swedish Cancer Society radiation therapy research investigation
- 2002
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Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 41:7-8, s. 596-603
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Tidskriftsartikel (refereegranskat)abstract
- In an investigation by the Swedish Cancer Society, the present status, critical issues and future aspects and prospects were described by an expert group for each of nine major areas of radiation research. A summary of the investigation is presented in this report. A more extensive summary (in Swedish) can be found at www.Cancerfonden.se. It is concluded that radiation therapy plays an increasingly important role in curative and palliative tumour treatment and presents a considerable challenge to research. Several suggestions are made that could improve the possibilities for high-quality radiation therapy research in Sweden.
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