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61.
  • Eltantawi, I., et al. (författare)
  • Bond performance of tensile lap-spliced basalt-FRP reinforcement in high-strength concrete beams
  • 2022
  • Ingår i: Composite structures. - : Elsevier BV. - 0263-8223 .- 1879-1085. ; 281
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper investigates the bond between high-strength concrete (HSC) and tensile lap-spliced basalt fiber-reinforced polymer (BFRP) bars. Ten large-scale BFRP-reinforced concrete beams (300 × 450 × 3900 mm) were fabricated and tested under four-point loading until failure. The parameters investigated included the BFRP bar diameter (10, 12, and 16 mm), the splice length (400–1200 mm range), and the bar surface texture (sand-coated (SC) and helically wrapped (HW)). Test results demonstrated that the flexural capacity of the beams reinforced with SC-BFRP bars was almost similar to that of beams reinforced with HW-BFRP bars. However, SC-BFRP bars showed a slightly higher bond with concrete compared to that of helically wrapped counterparts. The bond strength of spliced BFRP bars was inversely related to the splice length. Also, BFRP bars with larger diameter bars require longer splice lengths to reach their maximum capacity. Finally, the experimentally estimated critical splice lengths were compared to those calculated by existing models and code-based equations. Both ACI 440.1R-15 and CSA S806-12 provisions were conservative in predicting splice length for BFRP bars. However, the CSA-S6-14 design code was more accurate in estimating the splice length for BFRP with bigger diameters. Though, it was not conservative with smaller diameters.
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62.
  • Fahrenholtz, Ida Lysdahl, et al. (författare)
  • Short-term effects and long-term changes of FUEL - a digital sports nutrition intervention on REDs related symptoms in female athletes
  • 2023
  • Ingår i: Frontiers in Sports and Active Living. - Lausanne : Frontiers Media S.A.. - 2624-9367. ; 5
  • Tidskriftsartikel (refereegranskat)abstract
    • Female endurance athletes are at high risk for developing Relative Energy Deficiency in Sport (REDs), resulting in symptoms such as menstrual dysfunction and gastrointestinal (GI) problems. The primary aim of this study was to investigate effects of the FUEL (Food and nUtrition for Endurance athletes-a Learning program) intervention consisting of weekly online lectures combined with individual athlete-centered nutrition counseling every other week for sixteen weeks on REDs related symptoms in female endurance athletes at risk of low energy availability [Low Energy Availability in Females Questionnaire (LEAF-Q) score >= 8]. Female endurance athletes from Norway (n = 60), Sweden (n = 84), Ireland (n = 17), and Germany (n = 47) were recruited. Fifty athletes with risk of REDs (LEAF-Q score >= 8) and with low risk of eating disorders [Eating Disorder Examination Questionnaire (EDE-Q) global score <2.5], with no use of hormonal contraceptives and no chronic diseases, were allocated to either the FUEL intervention (n = 32) (FUEL) or a sixteen-week control period (n = 18) (CON). All but one completed FUEL and n = 15 completed CON. While no evidence for difference in change in LEAF-Q total or subscale scores between groups was detected post-intervention (BFincl < 1), the 6- and 12-months follow-up revealed strong evidence for improved LEAF-Q total (BFincl = 123) and menstrual score (BFincl = 840) and weak evidence for improved GI-score (BFincl = 2.3) among FUEL athletes. In addition, differences in change between groups was found for EDE-Q global score post-intervention (BFincl = 1.9). The reduction in EDE-Q score remained at 6- and 12- months follow-up among FUEL athletes. Therefore, the FUEL intervention may improve REDs related symptoms in female endurance athletes.
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63.
  • Franck, Alina, 1985-, et al. (författare)
  • Individual Pathways Through the Junior-to-Senior Transition : Narratives of Two Swedish Team Sport Athletes
  • 2020
  • Ingår i: Journal of Applied Sport Psychology. - Philadelphia, PA : Taylor & Francis Group. - 1041-3200 .- 1533-1571. ; 32:2, s. 168-185
  • Tidskriftsartikel (refereegranskat)abstract
    • Athletes frequently describe the junior-to-senior transition (JST) as the most difficult within-career transition, and many athletes have acknowledged that they failed to cope well with it. Athletes' development in the JST is influenced by narratives existing within relevant contexts and settings. This study served as a follow-up to the quantitative longitudinal study to gain a deeper understanding of individual JST paths through a qualitative narrative approach. The aim was to explore 2 team sport athletes' (John, the football player, and Anna, the basketball player) JST pathways, emphasizing psychosocial factors that were perceived as facilitating and debilitating the process. Narrative type interviews were conducted, and the holistic-form structural analysis was used. Through their narratives, John and Anna reconstructed their JST paths, attaching meanings to certain events, recounting the people involved, and making personal reflections. John had a performance and family narrative and Anna had an enjoyment and relationship narrative. They perceived their key facilitating persons to be their family members and teammates. The debilitating factors were some coaches' behaviors. At the time of this study, John and Anna had already terminated their athletic careers and had refocused on getting an education. Although they did not reach elite senior levels in their sports, they found their athletic careers to be meaningful life experiences. Lay Summary: The aim was to explore two team sport athletes' junior-to-senior transition (JST) pathways, emphasizing psychosocial factors involved in the transition process. The findings revealed two narratives. John (football player) storied his JST as a performance and family narrative and Anna (basketball player) as an enjoyment and relationship narrative.
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64.
  • Franck, Alina, 1985-, et al. (författare)
  • Profiles of personal characteristics and relevant pathways in the junior-to-senior transition : A longitudinal study of Swedish athletes
  • 2016
  • Ingår i: International Journal of Sport Psychology. - Rome : Edizioni Luigi Pozzi s.r.l.. - 0047-0767. ; 47:6, s. 483-507
  • Tidskriftsartikel (refereegranskat)abstract
    • In this study the specific foci were as follows: (1) to identify profiles of athletes in the junior-to-senior transition (JST) based on their personal characteristics (athletic identity, self-esteem and goal orientation) and (2) to describe the JST pathways relevant to the profiles. This quantitative longitudinal study included five measurements that were conducted approximately every six months. The following package of four instruments was used: the Athletic Identity Measurement Scale (Brewer, Van Raalte, & Linder, 1993), the Task and Ego Orientation in Sport Questionnaire (Duda, 1989), the self-esteem sub-scale from the Physical Self-Perception Profile – Revised (Lindwall, Hagger, & Asci, 2007) and the Transition Monitoring Survey (Stambulova, Franck, & Weibull, 2012). In the first measurement 100 club-based Swedish athletes (73 male and 27 female) with the mean age of 16.51 (SD = 1.32) participated. The Latent Profile Analysis identified three profiles of athletes and several similarities and differences can be seen in the profiles of athletes’ transition pathways. The main findings are: (1) three profiles of personal characteristics associated with different JST transition pathways were identified; (2) athletic identity appeared to be key personal characteristic that influenced the dynamic of adjustment and (3) different styles of coping strategies were associated with different JST pathways. The JST pathways relevant to the profiles are discussed based on the theoretical framework and previous research.
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65.
  • Franck, Alina, 1985-, et al. (författare)
  • Swedish athletes’ adjustment patterns in the junior-to-senior transition
  • 2018
  • Ingår i: International Journal of Sport and Exercise Psychology. - New York, NY : Taylor & Francis. - 1612-197X .- 1557-251X. ; 16:4, s. 398-414
  • Tidskriftsartikel (refereegranskat)abstract
    • The specific objectives of this study were: (a) to identify adjustment patterns in the junior-to-senior transition (JST) based on athletes’ dynamics of adjustment during a two-and-a-half-year period, and (b) to describe the athletes’ demographic, personal and transitional characteristics at the beginning of the JST that were related to the different adjustment patterns. This quantitative longitudinal study consisted of five measurements conducted approximately every six months over a two-and-a-half-year period. One instrument was used to measure the transition variables and three instruments to measure personal characteristics. In the first measurement, 101 club-based Swedish athletes with the mean age of 16.51 (SD = 1.32) took part. The latent profile analysis on athletes’ perceived degree of adjustment provided three profiles with different patterns in the JST. Profile 1 had a progressive adjustment pattern, whereas the second profile had a regressive adjustment pattern, and the third profile had a sustainable adjustment pattern. The descriptive statistics and Cohen’s d indicated that there were differences (with variation in magnitude) between the three profiles at the first measurement in terms of how athletes perceived different transitional characteristics. Keeping a primary focus on sport (but also having attention to other spheres of life), high athletic identity and motivation to reach senior level were characteristics relevant for both progressive and sustainable adjustment patterns.
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66.
  • Franck, Alina, 1985-, et al. (författare)
  • The junior to senior transition : a narrative analysis of the pathways of two Swedish athletes
  • 2019
  • Ingår i: Qualitative Research in Sport, Exercise and Health. - Abingdon : Taylor & Francis Group. - 2159-676X .- 2159-6778. ; 11:3, s. 284-298
  • Tidskriftsartikel (refereegranskat)abstract
    • There are as many careers with various pathways as there are athletes, and the interest in the junior-to-senior transition (JST) stems from its particular importance for athletes’ lives when aiming for the senior elite levels of their sports. This study is a follow-up of the quantitative longitudinal study that investigated the JST process in Swedish sport club athletes. The aim of this study was to explore two athletes’ (pseudonyms Erik, the swimmer, and Jessika, the tennis player) JST transition pathways, emphasising psychosocial factors that were perceived as facilitating and debilitating the transition process. Narrative-type interviews were conducted, and the stories were analysed using the holistic-form structural analysis. The analysis provided a central storyline (performance narrative) that is similar for both athletes, and two side storylines: Erik’s effort and relationship narrative and Jessika’s injury and reorientation narrative. They shared psychosocial factors that were perceived as facilitating the transition process, including family, coaches and sport club environment. For Erik, the debilitating factors were the negative changes in the group and a poor relationship with the new coach. The debilitating factors that influenced Jessika’s JST were the decrease/loss of financial support and the challenge of facing younger opponents against whom she felt she shouldn’t lose when making a comeback after an injury. After the JST, both Erik and Jessika changed their tracks in life, terminated their athletic careers and focused on pursuing higher education qualifications. © 2018, © 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
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67.
  • Fridell, Mats, et al. (författare)
  • Implementing guidelines for interventions in Swedish substance abuse treatment : A national evaluation of outcomes from 2010 to 2014
  • 2020
  • Ingår i: Journal of Substance Abuse Treatment. - Philadelphia : Elsevier. - 0740-5472 .- 1873-6483. ; 119, s. 1-12
  • Tidskriftsartikel (refereegranskat)abstract
    • In 2009, the Swedish government launched a nationwide dissemination and implementation project regarding substance abuse treatment, Knowledge to Practice (KTP), which was commissioned by the Swedish National Board of Health and Welfare (SoS). Aim: The study aimed to evaluate the effectiveness of a national project to disseminate and implement evidence-based assessment instruments and treatment methods, and to promote cross-sectional collaboration in substance abuse treatment. Design and recruitment: This study was a naturalistic prospective follow-up study of a sample of 3063 participants in 203 municipalities via five consecutive online surveys. Of the 21 Swedish regions, we included 20. All participants, representing 79.5% of the population, were employed in substance abuse treatment/care within social work and psychiatry. We used individual background variables and factors in the organizational readiness for change (ORC) questionnaire for prediction. Methods: We calculated descriptive statistics using SPSS 24.0. We applied latent profile analysis (LPA) to identify respondents with distinct growth profiles across five assessment points. Next, we calculated multilevel growth curve analyses using full information maximum likelihood analysis (FIML) in Mplus 8.3. In the analyses, we nested "within-person change" (level 1) in "between-persons analysis" (level 2). We, in turn, nested these in municipalities/regions (level 3). We included both respondents and organizational predictors in levels 2 and 3. We tested four statistical models in the multilevel analyses to predict the outcome. Results: The annual response rate was 59% on average across the five years. Respondents were a homogenous group with regard to education and years of employment, and two thirds were women. We identified four different trajectories nationwide, which showed different growth profiles for the use of methods and assessment instruments. Our results showed a larger between-region variation than within-region variation in outcome indicators. Some regions were more successful than others over the five years. At the respondent level, the years of employment in treatment work was associated with increased use of assessment instruments, while the ORC factor, institutional resources, predicted decreased use of assessment instruments. Specialist competence and the ORC factors staff attributes (job satisfaction, efficacy, and influence) and institutional resources predicted increased use of psychosocial treatment methods. The ORC factor organizational climate was positively associated with increased cross-sectional collaboration activities.
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68.
  • Fridlund, Bengt, et al. (författare)
  • Status and trends in Swedish dissertations in the area of cardiovascular nursing
  • 2007
  • Ingår i: European Journal of Cardiovascular Nursing. - Amsterdam : Elsevier. - 1474-5151 .- 1873-1953. ; 6, s. 72-6
  • Tidskriftsartikel (refereegranskat)abstract
    • In Europe, cardiovascular nursing (CVN) is a young branch of nursing science. The explicit knowledge contained in CVN dissertations has, so far, not been studied in Europe, and this is especially true in the case of Sweden. Accordingly, the aim of this literature study was to describe the status of and compare trends in Swedish dissertations in the area of CVN in terms of organisational structure, approach, research strategy, social orientation and socio-demographic aspects. The literature search resulted in 29 dissertations and a 26-item questionnaire that illuminated the problem areas. Most dissertations were produced in the universities of Göteborg, Halmstad and Linköping; a minority had a nurse as main supervisor; rehabilitation was the most common CVN approach; very few of the dissertations had an experimental design; and the majority was hospital-based. The main trends were (A) an increase in dissertations that were written during the last 6 years, (B) an increased number of nurses as main supervisors as well as publication in nursing journals, (C) an increase in hospital care settings while a decrease in community settings, and finally, (D) an increased number of dissertations addressing the issues of tertiary prevention as well as focusing on patients and next-of-kin as target groups. An important implication is to stimulate nurse-led interventions at all preventative levels in order to maintain or improve the cardiac health of both healthy and sick individuals, but also in order to visualize CVN and distinguish it from cardiology.
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69.
  • Fröberg, Andreas, 1985, et al. (författare)
  • Effects of an Empowerment-Based Health-Promotion School Intervention on Physical Activity and Sedentary Time among Adolescents in a Multicultural Area
  • 2018
  • Ingår i: International Journal of Environmental Research and Public Health. - Basel : MDPI. - 1661-7827 .- 1660-4601. ; 15:11
  • Tidskriftsartikel (refereegranskat)abstract
    • Physical activity (PA) decreases with age, and interventions are needed to promote PA during adolescence, especially, among those in low-socioeconomic status (SES) areas. The aim of this study was to investigate whether a two-year, empowerment-based health-promotion school intervention had any effects on changes in (a) moderate-to-vigorous PA (MVPA), (b) sedentary time (SED), (c) exercise training (ET) frequency, and (d) ET duration, among adolescents. Participants (aged 12-13 years at baseline) from one intervention school and two control schools, were recruited from a multicultural area of Sweden, characterized by low-SES. During the course of the two-year intervention, a total of 135 participants (43% boys) were included in the study. The intervention was developed and implemented as a result of cooperation and shared decision-making among the researchers and the participants. MVPA and SED were measured with accelerometers, and ET frequency and duration was self-reported at the beginning of the seventh, eighth, and ninth grade, respectively. There were no significant effects of the two-year, empowerment-based health-promotion school intervention on changes in the accelerometer-measured MVPA and SED, or the self-reported ET frequency and duration, among the adolescents. Overall, the intervention was unsuccessful at promoting PA and reducing SED. Several possible explanations for the intervention's lack of effects are discussed.
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70.
  • Gooth, Johannes, et al. (författare)
  • Local Magnetic Suppression of Topological Surface States in Bi2Te3 Nanowires
  • 2016
  • Ingår i: ACS Nano. - Washington : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 10:7, s. 7180-7188
  • Tidskriftsartikel (refereegranskat)abstract
    • Locally induced, magnetic order on the surface of a topological insulator nanowire could enable room-temperature topological quantum devices. Here we report on the realization of selective magnetic control over topological surface states on a single facet of a rectangular Bi2Te3 nanowire via a magnetic insulating Fe3O4 substrate. Low-temperature magnetotransport studies provide evidence for local time-reversal symmetry breaking and for enhanced gapping of the interfacial 1D energy spectrum by perpendicular magnetic-field components, leaving the remaining nanowire facets unaffected. Our results open up great opportunities for development of dissipation-less electronics and spintronics.
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