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Sökning: LAR1:gu > Högskolan i Gävle

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  • Backe-Hansen, Elisabeth, et al. (författare)
  • Out of home care in Norway and Sweden – similar and different
  • 2013
  • Ingår i: Psychosocial Intervention. - 1132-0559. ; 22:3, s. 193-202
  • Tidskriftsartikel (refereegranskat)abstract
    • An overview of the current situation in the out-of-home care in Norway and Sweden is presented in this article; also the development in later years is described and discussed. Socially, politically and culturally there are few differences between Norway and Sweden. Child protection and out-of-home placement of children and young people are integrated parts in the welfare state that are shared by the Nordic countries. It is a model that builds on principles of universalism and decommodification of social rights. The welfare model presupposes high public legitimacy for a high level of social expenditure. However the idea of marketization and privatization has also affected the welfare model in Sweden and Norway. Although there are more similarities than differences between the two countries' child protection systems, the article discusses some differences, for example the after care services, new groups of children and young people in the out-of-home care, like young unaccompanied asylum seekers. There are also some differences when it comes to privatization, the introduction of evidence-based methods in the child protection system and the tension between general and residual services for children and young people in the child protection system.
  • Bengtsson, Inger, et al. (författare)
  • The cortisol awakening response and the metabolic syndrome in a population-based sample of middle-aged men and women
  • 2010
  • Ingår i: Metabolism. - 0026-0495. ; 59:7, s. 1012-1019
  • Tidskriftsartikel (refereegranskat)abstract
    • The objective was to explore the relationship between the cortisol awakening response (CAR) and the metabolic syndrome (MetS) as defined by the National Cholesterol Education Program criteria. The final study sample consisted of 91 women (14 with MetS) and 84 men (15 with MetS), aged 45 to 70 years, from a general population sample. The only exclusion criteria were no consent, pregnancy, or insufficient cortisol testing. On the day of measurement (weekday), salivary cortisol was sampled at awakening and 15 minutes after awakening. Relative CAR (CAR%) and the MetS were the main variables studied. Results showed that, in women with the MetS, cortisol at awakening was significantly lower (mean, 8.92 vs 12.33 nmol/L; P = .05) and the CAR was significantly higher (91.4% vs 36.5%, P < .001) than in women without the syndrome. Significant difference in the relative CAR was also present between men and women with MetS (38.5% and 91.4%, respectively; P = .02). No difference was seen in the awakening response comparing men with and without the MetS. In a regression model, the response to awakening was dependent on the MetS in women (F1,89 = 13.19, P < .001); but the model was not significant in men. Furthermore, the awakening response was associated with more depressive symptoms in women (F1,80 = 8.12, P = .01) and with weekday/weekend cortisol sampling in men (F1,82 = 4.63, P = .03). The association between the relative CAR and the MetS remained significant but somewhat attenuated after adjusting for depressive symptoms (P = .01). Results indicate a sex difference in the CAR% in the presence of the MetS independent of depressive symptoms, a known correlate of the MetS.
  • Bengtsson, Johanna, et al. (författare)
  • Evaluations of effects due to low frequency noise in a low demanding work situation
  • 2004
  • Ingår i: Journal of Sound and Vibration. - 0022-460X. ; 278:1-2, s. 83-99
  • Tidskriftsartikel (refereegranskat)abstract
    • Noise sources with a dominating content of low frequencies (20-200 Hz) are found in many occupational environments. This study aimed to evaluate effects of moderate levels of low-frequency noise on attention, tiredness and motivation in a low demanding work situation. Two ventilation noises at the same A-weighted sound pressure level of 45 dB were used: one of a low-frequency character and one of a flat frequency character (reference noise). Thirty-eight female subjects worked with six performance tasks for 4 h in the noises in a between-subject design. Most of the tasks were monotonous and routine in character. Subjective reports were collected using questionnaires and cortisol levels were measured in saliva. The major finding in this study was that low-frequency noise negatively influenced performance on two tasks sensitive to reduced attention and on a proof-reading task. Performances of tasks aimed at evaluating motivation were not significantly affected. The difference in work performance was not reflected by the subjective reports. No effect of noise was found on subjective stress or cortisol levels. (C) 2004 Elsevier Ltd. All rights reserved.
  • Bengtsson, Johanna, et al. (författare)
  • Sound characteristics in low frequency noise and their relevance for the perception of pleasantness
  • 2004
  • Ingår i: Acta Acoustica. ; 90, s. 171-180
  • Tidskriftsartikel (refereegranskat)abstract
    • Noise sources with a dominant content of low frequencies (20-200 Hz) are found in many occupational environments. Work efficiency has been found in two earlier studies to be impaired to a larger degree when working in a low frequency ventilation noise than when working in a flat frequency ventilation noise at the same A-weighted sound pressure level. Other previous studies indicate that different sound characteristics found in low frequency noise are important for the way in which low frequency noise affects humans, and better knowledge of these characteristics could lead to better methods for assessing low frequency noise in occupational environments. The aim of this study was to evaluate the influence of frequency balance between low and high frequencies, which affects the slope of the frequency spectra, and the modulation frequency on subjects' perception of a pleasant low frequency noise. The results showed that the subjects preferred either a higher or a lower modulation frequency as compared to that of the original low frequency noise, both choices leading to less perceivable modulations. Furthermore, the subjects preferred a lower relative content of frequencies below 500 Hz, but only as long as the original low frequency noise contained modulations and the variations were made within a constant A-weighted sound pressure level. The results are discussed in relation to improved guidelines and to the previously suggested theory of slope of the frequency spectra and problems involved with the implementation of that theory.
  • 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).
  • Björk, Robert G., et al. (författare)
  • Long-term warming effects on root morphology, root mass distribution, and microbial activity in two dry tundra plant communities in northern Sweden
  • 2007
  • Ingår i: New Phytologist. - 0028-646X. ; 176:4, s. 862-873
  • Tidskriftsartikel (refereegranskat)abstract
    • • Effects of warming on root morphology, root mass distribution and microbialactivity were studied in organic and mineral soil layers in two alpine ecosystems over &gt; 10 yr, using open-top chambers, in Swedish Lapland.• Root mass was estimated using soil cores. Washed roots were scanned and sortedinto four diameter classes, for which variables including root mass (g dry matter(g DM) m –2 ), root length density (RLD; cm cm –3 soil), specific root length (SRL; m gDM –1 ), specific root area (SRA; m 2 kg DM –1 ), and number of root tips m –2 weredetermined. Nitrification (NEA) and denitrification enzyme activity (DEA) in the top10 cm of soil were measured.• Soil warming shifted the rooting zone towards the upper soil organic layer in bothplant communities. In the dry heath, warming increased SRL and SRA of the finestroots in both soil layers, whereas the dry meadow was unaffected. Neither NEA norDEA exhibited differences attributable to warming.• Tundra plants may respond to climate change by altering their root morphologyand mass while microbial activity may be unaffected. This suggests that carbon maybe incorporated in tundra soils partly as a result of increases in the mass of the finerroots if temperatures rise.
  • Björklund, Elisabeth, 1945- (författare)
  • Att erövra litteracitet : Små barns kommunikativa möten med berättande, bilder, text och tecken i förskolan
  • 2008
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • This thesis is based on an ethnographic field study among a group of monolingual children from one and a half to three years old at a pre-school in a Swedish village. The primary aim of the study has been to gain knowledge about how young children conquer and express literacy in their everyday lives. One assumption was that children are active and competent in their search for meaning when dealing with texts, signs and images. A second aim has been to investigate whether children’s literacy could have an impact on the social and cultural context of pre-school.Research questions addressed in the study focus on children’s participation in literacy events and their actions in literacy practice. An additional question was  whether children were contributing to literacy practice when interacting with other children in the group.The theoretical framework draws upon socio-cultural theory. The empirical material consists of video recordings and the focus of observation has been on children’s actions related to literacy, expressed as early literacy, including reading and writing as well as telling and retelling narratives, singing and other verbal and non verbal communication. In children’s literacy events and literacy practice the specific context was of central interest. All the material collected has been transcribed and transferred into text and constitutes the basis for analyzing what children are performing in actual events and practices. The guiding principle for description was at first to give a close reproduction of children’s verbal utterances and their acting linked to the concept of early literacy. Secondly, the aim was to describe and analyze whether the utterances and actions could be linked to the specific social and cultural context.The analysed material demonstrates how children participate and interact with each other while engaged in literacy and the material also displays the content of their communication. Two different kinds of literacy appear: one is narrative tellings and the other is reading and drawing/writing. A deeper analysis shows that children are building knowledge of telling and also creating a specific manifesto of literacy. The children also underline what they are doing through verbal expressions where they defined  themselves as both readers and writers.The result gives a contribution to new knowledge and an understanding of early literacy among very young children as something they have created in pre-school as a social and cultural environment. Literacy in the studied group of children uncovers many more expressions, including several actions with regard to written material, than we usally relate to the youngest children in pre-school.
  • Burström, Lage, et al. (författare)
  • Acute effects of vibration on thermal perception thresholds
  • 2008
  • Ingår i: International Archives of Occupational and Environmental Health. - Springer. - 0340-0131. ; 81:5, s. 603-611
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: This study focuses on the acute effects of vibration and how vibrations influence the measures of the thermal perception thresholds during different vibration magnitudes, frequencies, and durations. METHODS: The fingers of ten healthy subjects, five males and five females, were exposed to vibration under 16 conditions with a combination of different frequency, intensity and exposure time. The vibration frequency was 31.5 and 125 Hz and exposure lasted between 2 and 16 min. The energy-equivalent frequency weighted acceleration, according to ISO 5349-1, for the experimental time of 16 min was 2.5 or 5.0 m/s(2) (r.m.s.), corresponding to a 8-h equivalent acceleration, A(8) of 0.46 and 0.92 m/s(2), respectively. A measure of the thermal perception of cold and warmth was conducted before the different exposures to vibration. Immediately after the vibration exposure the acute effect was measured continuously on the exposed index finger for the first 75 s, followed by 30 s of measures at every minute for a maximum of 10 min. If the subject's thermal thresholds had not recovered, the measures continued for a maximum of 30 min with measurements taken every 5 min. RESULTS: For all experimental conditions and 30 s after exposure, the mean changes of the thresholds compared with the pre-test were found to be 0.05 and -0.67 degrees C for the warmth and cold thresholds, respectively. The effect of the vibration exposure was only significant on the cold threshold and only for the first minute after exposure when the threshold was decreased. The warmth threshold was not significantly affected at all. The frequency and the exposure time of the vibration stimuli had no significant influence on the perception thresholds for the sensation of cold or warmth. Increased equivalent frequency weighted acceleration resulted in a significant decrease of the subjects' cold threshold, not the warmth. The thresholds were unaffected when changes in the vibration magnitude were expressed as the frequency weighted acceleration or the unweighted acceleration. CONCLUSION: When testing for the thermotactile thresholds, exposure to vibration on the day of a test might influence the results. Until further knowledge is obtained the previous praxis of 2 h avoidance of vibration exposure before assessment is recommended.
  • Byström, Pernilla, et al. (författare)
  • Appraised psychological workload, musculoskeletal symptoms, and the mediating effect of fatigue: A structural equation modeling approach.
  • 2004
  • Ingår i: Scandinavian Journal of Psychology. ; 45, s. 331-341
  • Tidskriftsartikel (refereegranskat)abstract
    • The aim of the present study was to test two structural models of the relationship between appraised psychological workload and musculoskeletal symptoms from the neck, shoulder, and upper and lower back with different aspects of perceived fatigue as mediating variables. In this cross-sectional study a questionnaire survey was conducted among employees at three Swedish assembly plants (n= 305). The proposed models were tested for one general fatigue dimension - lack of energy - and four specific fatigue dimensions - physical discomfort, physical exertion, lack of motivation, and sleepiness - using structural equation modeling. The results indicate that the role of perceived fatigue in the relationship between appraised workload and musculoskeletal symptoms is different for different aspects of fatigue. The general fatigue dimension, lack of energy, does not mediate the relationship. As regards the specific fatigue dimensions, the relationship is partially mediated by physical discomfort and lack of motivation but not by physical exertion or sleepiness. Appraised psychological workload has a unique effect on musculoskeletal symptoms not mediated by fatigue.
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