| 1. |
- Josephson, Per-Erik, 1960, et al.
(author)
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Non value-adding costs in building projects: the missing thoughts
- 2002
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In: Proceedings of First International Conference on Construction in the 21st Century: Challenges and Opportunities in Management and Technology, Miami, Florida, USA, 25-26 April 2002. ; , s. 17-24
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Conference paper (peer-reviewed)
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| 2. |
- Evander, Eva, et al.
(author)
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Role of ventilation scintigraphy in diagnosis of acute pulmonary embolism: an evaluation using artificial neural networks.
- 2003
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In: European Journal of Nuclear Medicine and Molecular Imaging. - : Springer Science and Business Media LLC. - 1619-7070 .- 1619-7089. ; 30:7, s. 961-965
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Journal article (peer-reviewed)abstract
- The purpose of this study was to assess the value of the ventilation study in the diagnosis of acute pulmonary embolism using a new automated method. Either perfusion scintigrams alone or two different combinations of ventilation/perfusion scintigrams were used as the only source of information regarding pulmonary embolism. A completely automated method based on computerised image processing and artificial neural networks was used for the interpretation. Three artificial neural networks were trained for the diagnosis of pulmonary embolism. Each network was trained with 18 automatically obtained features. Three different sets of features originating from three sets of scintigrams were used. One network was trained using features obtained from each set of perfusion scintigrams, including six projections. The second network was trained using features from each set of (joint) ventilation and perfusion studies in six projections. A third network was trained using features from the perfusion study in six projections combined with a single ventilation image from the posterior view. A total of 1,087 scintigrams from patients with suspected pulmonary embolism were used for network training. The test group consisted of 102 patients who had undergone both scintigraphy and pulmonary angiography. Performances in the test group were measured as area under the receiver operation characteristic curve. The performance of the neural network in interpreting perfusion scintigrams alone was 0.79 (95% confidence limits 0.71–0.86). When one ventilation image (posterior view) was added to the perfusion study, the performance was 0.84 (0.77–0.90). This increase was statistically significant (P=0.022). The performance increased to 0.87 (0.81–0.93) when all perfusion and ventilation images were used, and the increase in performance from 0.79 to 0.87 was also statistically significant (P=0.016). The automated method presented here for the interpretation of lung scintigrams shows a significant increase in performance when one or all ventilation images are added to the six perfusion images. Thus, the ventilation study has a significant role in the diagnosis of acute lung embolism.
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| 3. |
- Feilitzen, Cecilia von
(author)
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Soap Operas, Effects of
- 2007
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In: Encyclopedia of children, adolescents, and the media. ; 2, s. 774-777
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Research review (peer-reviewed)
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| 4. |
- Warnling-Nerep, Wiweka
(author)
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Frågan om en föränderlig grundlag
- 2007
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In: Festskrift till Madeleine Leijonhufvud. ; , s. 403-417
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Journal article (other academic/artistic)
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| 5. |
- de Vries, Franciska T., et al.
(author)
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Soil food web properties explain ecosystem services across European land use systems
- 2013
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In: Proceedings of the National Academy of Sciences. - Washington, DC : Proceedings of the National Academy of Sciences. - 1091-6490 .- 0027-8424. ; 110:35, s. 14296-14301
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Journal article (peer-reviewed)abstract
- Intensive land use reduces the diversity and abundance of many soil biota, with consequences for the processes that they govern and the ecosystem services that these processes underpin. Relationships between soil biota and ecosystem processes have mostly been found in laboratory experiments and rarely are found in the field. Here, we quantified, across four countries of contrasting climatic and soil conditions in Europe, how differences in soil food web composition resulting from land use systems (intensive wheat rotation, extensive rotation, and permanent grassland) influence the functioning of soils and the ecosystem services that they deliver. Intensive wheat rotation consistently reduced the biomass of all components of the soil food web across all countries. Soil food web properties strongly and consistently predicted processes of C and N cycling across land use systems and geographic locations, and they were a better predictor of these processes than land use. Processes of carbon loss increased with soil food web properties that correlated with soil C content, such as earthworm biomass and fungal/bacterial energy channel ratio, and were greatest in permanent grassland. In contrast, processes of N cycling were explained by soil food web properties independent of land use, such as arbuscular mycorrhizal fungi and bacterial channel biomass. Our quantification of the contribution of soil organisms to processes of C and N cycling across land use systems and geographic locations shows that soil biota need to be included in C and N cycling models and highlights the need to map and conserve soil biodiversity across the world.
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| 6. |
- Wahlund, Jan-Erik, et al.
(author)
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In situ measurements of Saturn's ionosphere show that it is dynamic and interacts with the rings
- 2018
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In: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 359:6371, s. 66-68
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Journal article (peer-reviewed)abstract
- The ionized upper layer of Saturn's atmosphere, its ionosphere, provides a closure of currents mediated by the magnetic field to other electrically charged regions (for example, rings) and hosts ion-molecule chemistry. In 2017, the Cassini spacecraft passed inside the planet's rings, allowing in situ measurements of the ionosphere. The Radio and Plasma Wave Science instrument detected a cold, dense, and dynamic ionosphere at Saturn that interacts with the rings. Plasma densities reached up to 1000 cubic centimeters, and electron temperatures were below 1160 kelvin near closest approach. The density varied between orbits by up to two orders of magnitude. Saturn's A- and B-rings cast a shadow on the planet that reduced ionization in the upper atmosphere, causing a north-south asymmetry.
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| 7. |
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| 8. |
- Suo, Si
(author)
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Spontaneous imbibition of a liquid film wetting a wall-mounted cylinder corner
- 2023
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In: Soft Matter. - : Royal Society of Chemistry (RSC). - 1744-683X .- 1744-6848. ; 20:3, s. 578-587
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Journal article (peer-reviewed)abstract
- Spontaneous imbibition flows within confined geometries are commonly encountered in both natural phenomena and industrial applications. A profound knowledge of the underlying flow dynamics benefits a broad spectrum of engineering practices. Nonetheless, within this area, especially concerning complex geometries, there exists a substantial research gap. This work centers on the cylinder-plane geometry, employing a combined theoretical and numerical approach to investigate the process of a wetting film wrapping a cylinder corner. It is found that the advance of the liquid front generally follows the Lucas-Washburn kinetics, i.e., t1/2 scaling, but it also depends on the dynamics of the liquid source. Furthermore, a theoretical estimation of the timescale associated with the imbibition process is also provided, especially the merging time as an important time length characterizing the duration of the wetting process. The timescale is highly dependent on the wettability conditions and the properties of the involved liquid. The conclusion of this work lays a theoretical foundation for comprehensively understanding the capillary phenomena in complex media and shedding light on various microfluidic applications.
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| 9. |
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| 10. |
- Bloch, Ina
(author)
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Undersökning av växtplankton i 10 sjöar i Västmanlands län 2014
- 2015
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Reports (other academic/artistic)abstract
- SammanfattningAv de 10 undersökta lokalerna uppnådde sex sjöar god eller hög sammanvägd näringsstatus enligt bedömningsgrunderna. Statusen sänktes till måttlig för en av dessa sjöar (Rölen) i expertbedömningen. Sjön låg på gränsen mellan statusklasserna god och måttlig status. Endast en sjö fick otillfredsställande sammanvägd status enligt bedömningsgrunden. I övriga sjöar klassificerades näringsstatusen som måttlig både enligt bedömningsgrunderna och i expertbedömningen. Bland annat har tidigare undersökningars resultat och kunskap om hur de olika delparametrarna fungerar använts för att kunna göra en bra expertbedömning.Gonyostomum semen påträffades i tre av sjöarna. Dess biomassa var måttligt stor i en sjö, och förekomsten kan troligen ha orsakat obehag för personer som badat i sjön. Ingen sjö i undersökningen hade ett växtplanktonsamhälle som är märkbart surhetspåverkat, vilket kan visa sig i extremt låga artantal. Generellt sett var proven artrika och många arter som föredrar näringsfattiga förhållanden hittades, t.ex. guldalgen Dinobryon crenulatum.
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