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- Cappelen, Birgitta, 1962-, et al.
(author)
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From designing objects to designing fields : from control to freedom
- 2003
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In: Digital Creativity. - 1462-6268 .- 1744-3806. ; 14:2, s. 74-90
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Journal article (peer-reviewed)abstract
- In this paper we want to explore Field as a concept and as a metaphor for understanding interactive systems. By interactive systems we mean both systems and artworks, where the user by interacting changes the course of events. We intend to show why we need new terms and why we consider Field to be a fruitful concept and term. Further we will show how the Field concept changes both our understanding of what we do as designers and composers and how we acknowledge our audience. We will exemplify the design consequences of the Field concept by going through some design considerations we made when designing the audio tactile installation Mufi.
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| 2. |
- Björn van Praagh, Helena, et al.
(author)
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Metabolic fate of C-14-labelled chlorinated and non-chlorinated fatty acids in goldfish (Carassius auratus)
- 2004
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In: Fish Physiology & Biochemistry. - : Springer Science and Business Media LLC. - 0920-1742 .- 1573-5168. ; 30:1, s. 13-20
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Journal article (peer-reviewed)abstract
- In order to study the metabolic fate of chlorinated fatty acids in fish, goldfish were fed either 9,10-dichlorostearic acid or oleic acid, chosen as the unchlorinated analogue, both radiolabelled at either the carboxyl (1st) or the terminal (18th) carbon of the fatty acid chain. By keeping the fish in hermetically closed aquaria, all the respired, assimilated and excreted radioactivity could be accounted for. Fish fed 9,10-dichlorostearic acid labelled in the terminal end respired radioactive CO2 to a much lower degree than fish fed the other test compounds. As a consequence, the radioactivity bound in lipids was higher in the group of fish fed dichlorostearic acid labelled in the terminal end. It is suggested that the chlorine atoms in the middle of the carbon chain obstruct the metabolic turn-over of 9,10-dichlorostearic acid, which may have an impact on the residence time of these compounds in the ecosystem.
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| 4. |
- Yu, Shi-Yong, et al.
(author)
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Holocene palaeoecology and shoreline displacement on the Biskopsmåla Peninsula, southeastern Sweden
- 2003
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In: Boreas. - : Wiley. - 0300-9483 .- 1502-3885. ; 32, s. 578-589
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Journal article (peer-reviewed)abstract
- High-resolution palaeoecological proxies of pollen, macrofossils and diatoms from an isolation lake provide a long-term record of the Holocene landscape history and shoreline displacement on the Biskopsmala Peninsula in central Blekinge, SE Sweden. During the Preboreal/Boreal transition, the peninsula was sparsely vegetated by woodlands, along with lateglacial dwarf shrub/steppe communities. The lake basin was isolated from the shallow Yoldia Sea during this time. The regional climate improved from 10 700 cal. BP, evident as progressive expansion of Pinus -dominated mixed forest with deciduous trees. The lake basin was probably connected with the Ancylus Lake during the period 10 700-10 100 cal. BP. Subsequently the basin became isolated again, corresponding to the Early Littorina Sea phase. Replacement of freshwater diatoms by those with brackish-water affinity at 8100 cal. BP indicates the initial transgression of the Littorina Sea in this basin. But not until 7500 cal. BP were brackish conditions fully established. Peaks of brackish-marine diatoms and dinoflagellates during 7500-7000 cal. BP indicate increased saltwater inflow to the Baltic Sea in response to global meltwater pulse 3. However, interactive changes in seagrass and stonewort macrofossil concentrations suggest that three minor transgressions during 5900-5300, 5000-4700 and 4400-4000 cal. BP occurred locally, associated with centennial-scale variations in regional wind pattern or coastal storminess. By 3000 cal. BP, the lake basin was finally isolated from the Baltic, and thereafter the landscape on the peninsula became gradually more influenced by human activities.
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| 7. |
- Kavathatzopoulos, Iordanis
(author)
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New technologies in the education of native language
- 2004
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In: Greek language education in Scandinavia. ; , s. 73-76
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Conference paper (peer-reviewed)abstract
- Education in mother tongue as well as any education, demands the use of adequate methods and tools to be effective. New technology offers many possibilities for this purpose. In the present paper different IT solutions are discussed and their contribution to the goal of learning the mother tongue are examined. Necessary conditions for successful learning are supposed to be the careful choice and the continuous adaptation of used IT tools to the psychological learning process of the child.
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| 8. |
- Grahn, Maria, 1963, et al.
(author)
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Regionalized Global Energy Scenarios Meeting Stringent Climate Targets - cost effective fuel choices in the transportation sector
- 2003
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In: Risö international energy conference in Denmark, 19-21 May 2003.
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Conference paper (other academic/artistic)abstract
- The aim of this study is to analyze the world's future energy supply, in general, and cost-effective fuel choices in the transportation sector, in particular, under stringent CO2 abatement targets. The analysis is carried out with the help of a global energy systems model GET-R 1.0, developed specifically for this project. It is a linear programming model and it has three end-use sectors: electricity, heat and transportation fuel. It is set up to generate the energy supply mix that would meet exogenously givenenergy demands at the lowest global energy system cost. We have chosen an upper limit on CO2 emissions corresponding to an atmospheric CO2 concentration target of 400 ppm, by the year 2100. We find that it is cost-effective to carry out the transition from gasoline/diesel in the middle of the century and that hydrogen becomes the most cost-efficient fuel in the long run. Within the electricity production sector all renewable energy sources show a pattern of increasing contributions during the century and solar produced hydrogen will dominate by year 2100. Biomass is the dominant fuel in the heat sector. Scenarios are also presented which show the effects of different way of regionalizing the model. Here significant changes may occur, in particular when it comes to the where solar hydrogen is being produced. Further, we compare our results with those generated using a globally aggregated version of the model. We find that the regionalization only marginally affects the general pattern.
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| 9. |
- Grahn, Maria, 1963, et al.
(author)
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Regionalized Global Energy Scenarios Meeting Stringent CO2 Constraints - Cost-effective Fuel Choices for Transport
- 2003
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In: EnerEnv'2003, the first conference on energy and environment in Changsha, China, 11-14 October 2003.
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Conference paper (other academic/artistic)abstract
- The aim of this study is to analyze the worlds future energy supply, in general, and cost-effective fuel choicesin the transportation sector, in particular, under stringent CO2 constraints. The analysis is carried out with the help of a global energy system model GET-R 1.0, developed specifically for this project. It is a linear programming model and it has three end-use sectors: electricity, heat and transportation fuel. It is set up to generate the energy supply mix that would meet exogenously given energy demands at the lowest global cost. We have chosen an upper limit on CO2 emissions corresponding to an atmospheric CO2 concentration target of 400 ppm, by the year 2100. We find that it is cost-effective to carry out the transition from gasoline/diesel in the middle of the century and that hydrogen becomes the most costefficient fuel in the long run. Within the electricity production sector all renewable energy sources show a pattern of increasing contributions during the century and solar produced hydrogen will dominate by year 2100. Biomass is the dominant fuel in the heat sector. Further, we compare our results with those generated using a globally aggregated version of the model. We find that the regionalization only marginally affects the general pattern.
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| 10. |
- Öhrström, Lars, 1963, et al.
(author)
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Why and how can mathematics improve the learning in chemistry and chemical engineering?
- 2001
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In: The Swedish National Agency for Higher Education Quality Conference, 2001, Norrköping.
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Conference paper (other academic/artistic)abstract
- Mathematics that is taught at all engineering universities in Sweden and other countries has not been changed for a verylong time. With the shift toward greater use of mathematical numerical tools in many engineering subjects, the content andmanner of teaching in mathematics are undergoing profound changes. Since the mathematics often is taught early in acurriculum, it is of interest to investigate how the learning in mathematics will have an effect on the learning in chemistryand chemical engineering subjects. In the present work we discuss how changes in mathematics education might influencethe way of teaching and learning for the following subjects in the chemical engineering programme at Chalmers.Furthermore, some thoughts are provided on how the changed mathematical knowledge and skills among students andalso integration in the engineering subjects might affect and help in a deeper learning approach in particular chemicalengineering subjects, such as fundamental chemistry, chemical reaction engineering and bioprocess engineering which areimportant subjects within the different Programs at the school of chemical engineering.
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