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  • Abraham, David, et al. (författare)
  • Molecular phylogeny of the subfamilies in Geometridae (Geometroidea: Lepidoptera)
  • 2001
  • Ingår i: Molecular Phylogenetics and Evolution. - Elsevier. - 1095-9513. ; 20:1, s. 65-77
  • Tidskriftsartikel (refereegranskat)abstract
    • Molecular sequence data from three gene fragments were used to examine critically a provisional phylogenetic classification based on morphological characters of the Geometridae, one of the most species-rich families of moths. The sister group relationship between Geometridae and Drepanidae gained further support from the molecular analysis, which was based on the ND1 mitochondrial gene and the first and second expansion segments of the 28S ribosomal RNA gene. Although the alignment of the second expansion segment contained regions with many gaps, it provided the most resolution of the gene fragments. Parsimony analysis of the combined data resulted in a cladogram in which species belonging to Drepanidae, Larentiinae, and Sterrhinae formed monophyletic groups. The Ennominae did not form a monophyletic group but rather were contained within a broader monophyletic group including Archiearinae, Geometrinae, and Alsophilinae (represented by only one species per group in the present study). The molecular results were used to explore further the relationship between Sterrhinae and Larentiinae, the question as to whether Ennominae actually represent a monophyletic group, and the relationships between Ennominae and some of the other subfamilies.
  • Arvidsson, Inger, et al. (författare)
  • Changes in physical workload with implementation of mouse-based information technology in air traffic control
  • 2006
  • Ingår i: International Journal of Industrial Ergonomics. - Elsevier. - 0169-8141. ; 36:7, s. 613-622
  • Tidskriftsartikel (refereegranskat)abstract
    • Effects on physical workload were quantified when introducing new information technology in air traffic control. Seven female and 7 male air traffic controllers were studied in an old control system, and during simulated-but similar-work in a new, mouse-based system. Postures, movements and muscular load were recorded (inclinometry for head, neck, back and upper arms; goniometry for wrists; elect romyography for the trapezius and forearm extensor muscles). The new system was associated with lower movement velocities than the old one (examples: [50th percentiles] head flexion: 2 vs. 5 degrees/s, P < 0.01; right arm elevation: 3 vs. 6 degrees/s; P < 0.01; [90th percentile] wrist flexion: 19 vs. 50 degrees/s, P < 0.01), less varying postures (head: 95th-5th percentile range 17 degrees vs. 34 degrees; P < 0.01), and less muscular rest in the right forearm extensors (3.5% vs. 9% of time; P < 0.05). The old/new system differences were amplified at high work intensities. The new air traffic control system caused a major change of physical exposures, probably associated with an increased risk of musculoskeletal disorders in arms and hands. Relevance to industry While this study concerned the specific changes in the introduction of a new air traffic control system, we believe that the findings are applicable to similar technological developments in other settings. (c) 2006 Elsevier B.V. All rights reserved.
  • Arvidsson, Inger, et al. (författare)
  • Neck postures in air traffic controllers with and without neck/shoulder disorders.
  • 2008
  • Ingår i: Applied Ergonomics. - Elsevier. - 1872-9126. ; 39:2, s. 255-260
  • Tidskriftsartikel (refereegranskat)abstract
    • Prolonged computer work with an extended neck is commonly believed to be associated with an increased risk of neck–shoulder disorders. The aim of this study was to compare neck postures during computer work between female cases with neck–shoulder disorders, and healthy referents. Based on physical examinations, 13 cases and 11 referents were selected among 70 female air traffic controllers with the same computer-based work tasks and identical workstations. Postures and movements were measured by inclinometers, placed on the forehead and upper back (C7/Th1) during authentic air traffic control. A recently developed method was applied to assess flexion/extension in the neck, calculated as the difference between head and upper back flexion/extension. Results: cases and referents did not differ significantly in neck posture (median neck flexion/extension: −10° vs. −9°; p=0.9). Hence, the belief that neck extension posture is associated with neck–shoulder disorders in computer work is not supported by the present data.
  • Berggren Kleja, Dan, et al. (författare)
  • Pools and fluxes of carbon in three Norway spruce ecosystems along a climatic gradient in Sweden
  • 2008
  • Ingår i: Biogeochemistry. - Springer. - 1573-515X. ; 89:1, s. 7-25
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper presents an integrated analysis of organic carbon (C) pools in soils and vegetation, within-ecosystem fluxes and net ecosystem exchange (NEE) in three 40-year old Norway spruce stands along a north-south climatic gradient in Sweden, measured 2001-2004. A process-orientated ecosystem model (CoupModel), previously parameterised on a regional dataset, was used for the analysis. Pools of soil organic carbon (SOC) and tree growth rates were highest at the southernmost site (1.6 and 2.0-fold, respectively). Tree litter production (litterfall and root litter) was also highest in the south, with about half coming from fine roots (< 1 mm) at all sites. However, when the litter input from the forest floor vegetation was included, the difference in total litter input rate between the sites almost disappeared (190-233 g C m(-2) year(-1)). We propose that a higher N deposition and N availability in the south result in a slower turnover of soil organic matter than in the north. This effect seems to overshadow the effect of temperature. At the southern site, 19% of the total litter input to the O horizon was leached to the mineral soil as dissolved organic carbon, while at the two northern sites the corresponding figure was approx. 9%. The CoupModel accurately described general C cycling behaviour in these ecosystems, reproducing the differences between north and south. The simulated changes in SOC pools during the measurement period were small, ranging from -8 g C m(-2) year(-1) in the north to +9 g C m(-2) year(-1) in the south. In contrast, NEE and tree growth measurements at the northernmost site suggest that the soil lost about 90 g C m(-2) year(-1).
  • Bernardo, Ricardo, et al. (författare)
  • Measurements of the Electrical Incidence Angle Modifiers of an Asymmetrical Photovoltaic/Thermal Compound Parabolic Concentrating-Collector
  • 2013
  • Ingår i: Engineering. - Scientific Research. - 1947-394X. ; 5:1B, s. 37-43
  • Tidskriftsartikel (refereegranskat)abstract
    • Reflector edges, sharp acceptance angles and by-pass diodes introduce large variations in the electrical performance of asymmetrical concentrating photovoltaic/thermal modules over a short incidence angle interval. It is therefore important to quantify these impacts precisely. The impact on the electrical performance of the optical properties of an asymmetrical photovoltaic/thermal CPC-collector was measured in Maputo, Mozambique. The measurements were carried out with the focus on attaining a high resolution incidence angle modifier in both the longitudinal and transversal directions, since large variations were expected over small angle intervals. A detailed analysis of the contribution of the diffuse radiation to the total output was also carried out. The solar cells have an electrical efficiency of 18% while the maximum measured electrical efficiency of the collector was 13.9 % per active glazed area and 20.9 % per active cell area, at 25 °C. Such data make it possible to quantify not only the electrical performance for different climatic and operating conditions but also to determine potential improvements to the collector design. The electrical output can be increased by a number of different measures, e.g. removing the outermost cells, turning the edge cells 90°, dividing each receiver side into three or four parts and directing the tracking, when used, along a north-south axis.
  • Betzholtz, Per-Eric, et al. (författare)
  • With that diet, you will go far: trait-based analysis reveals a link between rapid range expansion and a nitrogen-favoured diet
  • 2013
  • Ingår i: Royal Society of London. Proceedings B. Biological Sciences. - Royal Society. - 1471-2954. ; 280:1750
  • Tidskriftsartikel (refereegranskat)abstract
    • Recent global change has had a substantial influence on the distribution of organisms, and many species are currently expanding their ranges. To evaluate the underlying processes, long-term data with good geographic resolution are essential. One important but generally overlooked data source is offered by the taxon-specific national catalogues of first provincial records that are kept in many countries. Here, we use such data to quantify trait-based influences on range expansion in Swedish butterflies and moths between 1973 and 2010. Of 282 species meeting pre-defined quality criteria, 170 expanded their northern range margin, with a mean expansion rate of 2.7 km per year. The analyses demonstrate that habitat and diet generalists, forest species and species active during warm conditions have expanded their ranges more rapidly than other species. Notably, range expansion in diet specialists was positively related to a nitrogen-favoured larval diet, an effect not found among oligo- or polyphagous species. In contrast to the general view, this shows that specialist species can undergo rapid range expansion. We suggest that increased areas of nitrogen-rich habitat, and increased availability of a nitrogen-favoured diet, are among the most important drivers of range expansions, potentially having far-reaching consequences for a wide variety of organisms.
  • Brännström, Margareta, et al. (författare)
  • Sexual Knowledge in Patients With a Myocardial Infarction and Their Partners.
  • 2014
  • Ingår i: Journal of Cardiovascular Nursing. - Lippincott Williams & Wilkins. - 1550-5049. ; 29:4, s. 332-339
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND:: Sexual health and sexual activity are important elements of an individual's well-being. For couples, this topic is often affected after a myocardial infarction (MI). It has become increasingly clear that, after an MI, patients are insufficiently educated on how to resume normal sexual activity. However, sufficient data on the general knowledge that patients and partners have about sexual activity and MI are lacking. OBJECTIVE:: The aims of this study were to explore and compare patients' and partners' sexual knowledge 1 month after a first MI and 1 year after the event and to compare whether the individual knowledge had changed over time. A second aim was to investigate whether patients and their partners report receiving information about sexual health and sexual activity from healthcare professionals during the first year after the event and how this information was perceived. SUBJECTS AND METHODS:: This descriptive, comparative survey study enrolled participants from 13 Swedish hospitals in 2007-2009. A total of 115 patients with a first MI and their partners answered the Sex After MI Knowledge Test questionnaire 1 month after the MI and 1 year after the event. Correct responses generated a maximum score of 75. RESULTS:: Only 41% of patients and 31% of partners stated that they had received information on sex and relationships at the 1 year follow-up. The patients scored 51 ± 10 on the Sex After MI Knowledge Test at inclusion into the study, compared with the 52 ± 10 score for the partners. At the 1-year follow-up, the patients' knowledge had significantly increased to a score of 55 ± 7, but the partners' knowledge did not significantly change (53 ± 10). CONCLUSIONS:: First MI patients and their partners reported receiving limited information about sexual issues during the cardiac rehabilitation and had limited knowledge about sexual health and sexual activity.
  • Citizen Schein
  • 2010
  • Samlingsverk (redaktörskap) (övrigt vetenskapligt)abstract
    • Harry Schein är en av den moderna svenska mediehistoriens mest inflytelserika personer. Hans initiativ till filmreformen 1963 och inrättande av Svenska Filminstitutet (SFI) är väldokumenterat och omskrivet – inte minst av honom själv. Vid sidan av ledarskapet för SFI hade han en mängd nyckelpositioner inom filmbransch, press och etermedia. Schein var också en flitig skribent och samhällsdebattör: som filmkritiker introducerade han under 50-talet kontinental och amerikansk filmteori; som författare och medieutredare förebådade han under 60- och 70-talen de digitala mediernas utveckling; som debattör identifierade han tidigt potentiella och reella problem – samt inte minst inkonsekvenser – i den svenska kulturpolitik han också kom att bli en del av. Harry Scheins centrala roll i den svenska offentligheten kan med fördel iakttas med ett slags dubbel optik: en synlighetens och en osynlighetens. På ett plan ägde han en välexponerad medial persona, ständigt närvarande i press, radio och TV. Samtidigt var han integrerad i olika informella och mer eller mindre inofficiella kontaktnät inom näringsliv och socialdemokrati, liksom givetvis i olika kulturetablissemang.
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