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Sökning: LAR1:lu > Refereegranskat > Högskolan i Gävle

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1.
  • Abraham, David, et al. (författare)
  • Molecular Phylogeny of the Subfamilies in Geometridae (Geometroidea: Lepidoptera)
  • 2001
  • Ingår i: Molecular Phylogenetics and Evolution. - Elsevier. - 1055-7903. ; 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.
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2.
  • 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 Science B.V.. - 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.
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3.
  • Arvidsson, Inger, et al. (författare)
  • Neck postures in air traffic controllers with and without neck/shoulder disorders.
  • 2008
  • Ingår i: Applied Ergonomics. - Elsevier Ltd. - 0003-6870. ; 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.
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5.
  • 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: Proceedings of the Royal Society B: Biological Sciences. - Royal Society Publishing. - 1471-2954 .- 0962-8452. ; 280:1750, s. 20122305
  • 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.
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6.
  • Brannstrom, Margareta, et al. (författare)
  • Sexual Knowledge in Patients With a Myocardial Infarction and Their Partners
  • 2014
  • Ingår i: Journal of Cardiovascular Nursing. - Lippincott, Williams andamp; Wilkins. - 0889-4655. ; 29:4, s. 332-339
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Sexual health and sexual activity are important elements of an individuals 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.
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9.
  • Dahlgren, Anders, et al. (författare)
  • Planning Rescue Services with Non-Stationary Rescue Units
  • 2009
  • Ingår i: Fire Technology. - Springer Netherlands. - 0015-2684. ; 45:3, s. 239-255
  • Tidskriftsartikel (refereegranskat)abstract
    • Geographical accessibility is fundamental when planning rescue services. At present there are several programs for computing the accessibility of stationary rescue units. This study suggests a method for evaluating geographic accessibility in scenarios containing also non-stationary units. The method supports the planning process by matching the risk of an incident occurring with the rescue units’ capabilities and accessibility. The method is implemented in the computer program Rescue Unit Planner. The result of the analysis is presented in thematic maps and graphs as level of coverage, mean response time and concentration. The method and the computer program have been evaluated in two case studies: one urban area in southern Sweden and one rural area in northern Sweden. The case studies show that that this method can be useful in the rescue service planning process.
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10.
  • Hansson, Gert-Åke, et al. (författare)
  • Precision of measurements of physical workload during standardised manual handling. Part II:
  • 2006
  • Ingår i: Journal of Electromyography and Kinesiology. - Elsevier. - 1050-6411. ; 16:2, s. 125-136
  • Tidskriftsartikel (refereegranskat)abstract
    • For measuring the physical exposure/workload in studies of work-related musculoskeletal disorders, direct measurements are valuable. However, the between-days and between-subjects variability, as well as the precision of the method per se, are not well known. In a laboratory, six women performed three standardised assembly tasks, all of them repeated on three different days. Triaxial inclinometers were applied to the head, upper back and upper arms. Between-days (within subjects) and between-subjects (within tasks) variance components were derived for the 10th, 50th and 90th percentiles of the angular and the angular velocity distributions, and for the proportion of time spent in predefined angular sectors. For percentiles of the angular distributions, the average between-days variability was 3.4 degrees. and the between-subjects variability 4.0 degrees. For proportion of time spent in angular sectors, the variability depended on the percentage of time spent in the sector; the relative variability was scattered and large.. on average 103% between days and 56% between subjects. For the angular velocity percentiles. the average between-days variability was 7.9%. and the average between-subjects variability was 22%. The contribution of the measurement procedure per se to the between-days variability, i.e.. the imprecision of the method, was small: less than 2 degrees for angles and 3% for angular velocity. (C) 2005 Published by Elsevier Ltd.
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