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- Edvardsson, Karin, et al.
(author)
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Gravel Roads and Dust Suppression
- 2009
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In: International Journal on Road Materials and Pavement Design. - 1468-0629 .- 2164-7402. ; 10:3, s. 439-469
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Journal article (peer-reviewed)abstract
- This review paper deals with the field of dust generation on gravel roads, dust suppressant performance and evaluation techniques. By applying the proper dust suppressant, matching the gravel road condition specific to the site, dust emission can be reduced, thereby providing a healthier ambient air environment, increasing road safety and ride comfort while reducing the need and cost of vehicle repair, road maintenance activities, and aggregate replacement. By applying the proper application rate of the dust suppressant, the cost of annual dust control as well as the environmental impact can be significantly reduced. Suitable measuring techniques for evaluating dust suppressant efficiency will facilitate the choice of the most appropriate dust suppressant and its optimal application rate.
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| 2. |
- Edvardsson, Karin, et al.
(author)
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Monitoring of dust emission on gravel roads : Development of a mobile methodology and examination of horizontal diffusion
- 2009
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In: Atmospheric Environment. - : Elsevier BV. - 1352-2310 .- 1873-2844. ; 43:4, s. 889-896
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Journal article (peer-reviewed)abstract
- Traffic-generated fugitive dust on gravel roads impairs visibility and deposits on the adjacent environment. Particulate matter smaller than 10 mu m in diameter (PM10) is also associated with human health problems. Dust emission strength depends on the composition of granular material, road moisture, relative humidity, local Climate (precipitation, wind velocity, etc.), and vehicle characteristics. The objectives of this study Were to develop a reliable and rapid mobile methodology to measure dust concentrations on gravel roads, evaluate the precision and repeatability of the methodology and correspondence with the currently used Visual assessment technique. Downwind horizontal diffusion was studied to evaluate the risk of exceeding the maximum allowed particulate matter concentration in ambient air near gravel roads according to European Council Directive [European Council Directive 1999/30/EC of 22 April 1999 relating to limit values for sulphur dioxide, nitrogen dioxide and oxides of nitrogen, particulate matter and lead in ambient air. Official Journal of the European Communities. L163/41.]. A TSI DustTrak Aerosol Monitor was mounted on an estate car travelling along test sections treated with various dust suppressants. Measured PM10 concentrations were compared to Visual assessments performed at the same time. Airborne particles were collected in filters Mounted behind the vehicle to compare the whole dust fraction with the PM10 concentration. For measuring the horizontal diffusion, DustTraks were placed at Various distances downwind of a dusty road section. The mobile methodology was vehicle and speed dependent but not driver dependent with pre-specified driving behaviours. A high linear correlation between PM10 of different vehicles makes relative measurements of dust concentrations possible. The methodology gives continuous data series, mobility, and easy handling and provides fast, reliable and inexpensive measurements for estimating road conditions to make road maintenance more efficient. Good correlations between measured PM10-values, visually assessed dust generation and dust collected in filters were obtained. PM10 seems to be correlated to the whole dust fraction that impairs visibility on gravel roads. A decay in PM10 concentration as a function of distance from the road was observed. Measured particles principally did not travel further than 45 m from the road. The risk of exceeding the PM10 concentration stated in the EC-directive seems small.
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| 4. |
- Alexanderson, Karin, 1952-
(author)
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Vilja, kunna, förstå : om implementering av systematisk dokumentation för verksamhetsutveckling i socialtjänsten
- 2006
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Doctoral thesis (other academic/artistic)abstract
- The aim of this study is to analyse conditions that either promote or hamper the implementation of methods for systematic documentation, follow-up and evaluation in social-work services with individuals and families. The theoretical framework consists of organization theories. Human Service Organizations (HSO) theory is complemented with concepts from the new institutionalism, domain theory, implementation theory, and theory about interventions.A concrete case, a project has been studied. The purpose of project was to implement methods for systematic documentation in public social services. With the notation “integrated” is meant that the methods should be built in and adjusted to the social-work practice. The methods were ASI (Addiction Severity Index) and IUS (a locally based model for integrated evaluation by inspiration from Göran Sandell).Data has been captured in a pretest/ posttest design (Marlow 2000). This means that “state of things” has been described before the intervention and after. The methods used were surveys and interviews (individual and group). The process has been documented through research notes proceeding records, protocols and some diaries written by social workers. Four municipalities from the middle of Sweden took part with five working groups. Two groups contained social workers acting with children and families and three groups were working with drug abusers. The population consisted of the social workers, the managers responsible for the individual and family entities, the politicians and the clients who were affected during the time of the project.The implementation of ASI and IUS has not occurred in the extent that was stated in the intervention theory. This means that ASI and IUS were not used in all new cases that occurred during the time of the project. The interviews supposed to be done in the beginning of the clients contact with the agency tended to be done more often than the follow-up interviews. After the project ended, three of five working groups decided to continue to use ASI (one group) and IUS (two groups). The overall impression is that the respondents comprehend, they have the willingness but they do not have the capability of using ASI and IUS. The organization does not seem to have the capacity of imposing requirements and giving resources. The outcomes do not seem to be the most important issue for the social services. These conditions are discussed in the study by means of the theoretical concepts. In the end, there is an effort to adjust the implementation theory to human service organizations.
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| 6. |
- Berg, Ida, et al.
(author)
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“Good job!” : Therapists' encouragement, affirmation, and personal address in internet-based cognitive behavior therapy for adolescents with depression
- 2022
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In: Internet Interventions. - : Elsevier. - 2214-7829. ; 30
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Journal article (peer-reviewed)abstract
- Internet-delivered interventions are generally effective for psychological problems. While the presence of a clinician guiding the client via text messages typically leads to better outcomes, the characteristics of what constitutes high-quality communication are less well investigated. This study aimed to identify how an internet therapist most effectively communicates with clients in internet-delivered cognitive behavioral therapy (ICBT). Using data from a treatment study of depressed adolescents with a focus on participants who had a positive outcome, messages from therapists were analyzed using thematic analysis. The study focused on the therapist's 1) encouragement and 2) affirmation, and how the therapists used 3) personal address. The analysis resulted in a total of twelve themes (Persistence Wins, You Are a Superhero, You Make Your Luck, You Understand, Hard Times, You Are Like Others, My View on the Matter, Time for a Change, Welcome In, Let Me Help You, You Affect Me, and I Am Human). Overall, the themes form patterns where treatment is described as hard work that requires a motivated client who is encouraged by the therapist. The findings are discussed based on the cognitive behavioral theoretical foundation of the treatment, prior research on therapist behaviors, and the fact that the treatment is provided over the internet.
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| 7. |
- Bjelke, Maria, et al.
(author)
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Using the internet as a source of information during pregnancy : a descriptive cross-sectional study in Sweden
- 2016
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In: Midwifery. - : Elsevier. - 0266-6138 .- 1532-3099. ; 40, s. 187-191
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Journal article (peer-reviewed)abstract
- ObjectiveThe Internet plays a major role for pregnant women in seeking knowledge and for getting in touch with like-minded women. The information is available at all hours and can be accessed anywhere. The information provides the women with a sense of control and confidence but the large amount of information available can also be overwhelming. The aim of this study was to identify how women use the Internet as a source of information during their pregnancy and how it affects them.Design and settingA descriptive cross-sectional study was conducted.Data were collected through a questionnaire at antenatal clinics in the southern Sweden. The data were analyzed descriptivelyParticipantsA total of 193 Swedish women, pregnant at least 34 weeks, participated in the study. The response rate was 94%.FindingsAlmost all (95%) of the women in the study used the Internet as a source of information. The main reason was to find information and read about people in the same situation. Reading pregnancy-related information on the Internet was seen as positive. However, a majority of the woman experienced feelings of worry due to something they read online. These feelings were most commonly coped with by talking to a partner, relatives, and friends or by asking the midwife at their next appointment. Eleven per cent of the women contacted the general healthcare services because of their feelings of worry.ConclusionAlmost all women in this study searched the Internet to find pregnancy-related information, despite being satisfied with the information they received from the ANC. Using the Internet was seen as complementary to the information from professionals. It also caused feelings of worry, which could lead to the woman contacting healthcare services for support. ANC could help to reduce these feelings for some women by informing about the advantages and disadvantages with online information and recommending suitable web pages.
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| 8. |
- Bjursell, Mikael, 1977, et al.
(author)
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Acutely reduced locomotor activity is a major contributor to Western diet-induced obesity in mice
- 2008
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In: American Journal of Physiology-Endocrinology and Metabolism. - : American Physiological Society. - 0193-1849 .- 1522-1555. ; 294:2
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Journal article (peer-reviewed)abstract
- The aim of the present study was to investigate the short- and long-term effects of a high-fat Western diet (WD) on intake, storage, expenditure, and fecal loss of energy as well as effects on locomotor activity and thermogenesis. WD for only 24 h resulted in a marked physiological shift in energy homeostasis, including increased body weight gain, body fat, and energy expenditure (EE) but an acutely lowered locomotor activity. The acute reduction in locomotor activity was observed after only 3–5 h on WD. The energy intake and energy absorption were increased during the first 24 h, lower after 72 h, and normalized between 7 and 14 days on WD compared with mice given chow diet. Core body temperature and EE was increased between 48 and 72 h but normalized after 21 days on WD. These changes paralleled plasma T3 levels and uncoupling protein-1 expression in brown adipose tissue. After 21 days of WD, energy intake and absorption, EE, and body temperature were normalized. In contrast, the locomotor activity was reduced and body weight gain was increased over the entire 21-day study period on WD. Calculations based on the correlation between locomotor activity and EE in 2-h intervals at days 21–23 indicated that a large portion of the higher body weight gain in the WD group could be attributed to the reduced locomotor activity. In summary, an acute and persisting decrease in locomotor activity is most important for the effect of WD on body weight gain and obesity in mice.
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