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- Bean, Christopher G., 1990-, et al.
(author)
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Group activity participation at age 21 and depressive symptoms during boom and recession in Sweden : a 20-year follow-up
- 2019
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In: European Journal of Public Health. - : Oxford University Press (OUP). - 1101-1262 .- 1464-360X. ; 29:3, s. 475-481
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Journal article (peer-reviewed)abstract
- Background: Organized group activities (e.g. sports or arts clubs) have long been noted as important developmental settings for youth, yet previous studies on the relationships between participation and mental health outcomes have focused on short-term effects among school-aged adolescents. The subsequent period of life, emerging adulthood, has been largely overlooked despite being another important life stage where individuals face new existential challenges and may benefit from group activity participation. The potential for macroeconomic conditions to modify these relationships has also not been considered. Methods: Participants (n = 1654) comprise two cohorts, born in either 1965 (n = 968) or 1973 (n = 686), from the same middle-sized industrial town in Northern Sweden. Both cohorts completed detailed questionnaires at age 21 (macroeconomic boom for Cohort 65, recession for Cohort 73) and approximately 20 years follow-up (age 43 for Cohort 65, age 39 for Cohort 73). General linear models were used to assess concurrent and prospective associations between regular group activity participation and depressive symptoms, as well as the potential interaction with boom/recession. Results: After controlling for sociodemographic factors, regular group activity participation at age 21 was associated with lower depressive symptoms, both concurrently and at follow-up. Those exposed to recession at age 21 reported higher depressive symptoms at the time but there was no interaction between cohort (boom/recession) and group activity participation. Conclusions: Regular group activity participation during emerging adulthood is associated with lower depressive symptoms uniformly in times of boom and recession. Beneficial effects of such participation may contribute to better mental health over 20 years.
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| 3. |
- Gustafsson, Thomas, 1975-, et al.
(author)
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A similarity-aware multiversion concurrency control and updating algorithm for up-to-date snapshots of data
- 2005
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In: The 17th Euromicro Conference on Real-Time Systems ECRTS05,2005. - Washington, DC, USA : IEEE Computer Society Press. ; , s. 229-
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Conference paper (peer-reviewed)abstract
- Real-time databases handle reading and writing of data with time constraints on transactions. Normally, data items in a real-time system have freshness requirements which need to be guaranteed, and for many transactions it is important that accessed data items origin from the same system state, which can be ensured by letting the transactions read a snapshot of the database. In this context, a snapshot at a specific time represents values on data items that were stored in the database at this time. Furthermore, similar values can be considered equal because values within given bounds do not affect the results from calculations. Previous work shows that using similarity among values of data items greatly increases the performance because there is a possibility to skip calculations. In this paper we present the MVTO-S concurrency control algorithm, which supports similarity and multiple versions of data and ensures that transactions read an up-to-date snapshot of a database. Performance evaluations show that MVTO-S increases the performance considerably compared to well-established single-version concurrency control algorithms.
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