| 1. |
- Abolfathi, Bela, et al.
(författare)
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The Fourteenth Data Release of the Sloan Digital Sky Survey : First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment
- 2018
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Ingår i: Astrophysical Journal Supplement Series. - : IOP Publishing Ltd. - 0067-0049 .- 1538-4365. ; 235:2
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Tidskriftsartikel (refereegranskat)abstract
- The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014-2016 July) public. Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey; the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data-driven machine-learning algorithm known as "The Cannon"; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from the SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS web site (www.sdss.org) has been updated for this release and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020 and will be followed by SDSS-V.
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| 2. |
- Blanton, Michael R., et al.
(författare)
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Sloan Digital Sky Survey IV : Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
- 2017
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Ingår i: Astronomical Journal. - : IOP Publishing Ltd. - 0004-6256 .- 1538-3881. ; 154:1
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Tidskriftsartikel (refereegranskat)abstract
- We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high resolution and. high signal-to-noise ratios in the near-infrared. The Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey is obtaining spatially resolved spectroscopy for thousands of nearby galaxies (median z similar to 0.03). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between z similar to 0.6 and 3.5 to constrain cosmology using baryon acoustic oscillations, redshift space distortions, and the shape of the power spectrum. Within eBOSS, we are conducting two major subprograms: the SPectroscopic IDentification of eROSITA Sources (SPIDERS), investigating X-ray AGNs. and galaxies in X-ray clusters, and the Time Domain Spectroscopic Survey (TDSS), obtaining spectra of variable sources. All programs use the 2.5 m Sloan Foundation Telescope at the. Apache Point Observatory; observations there began in Summer 2014. APOGEE-2 also operates a second near-infrared spectrograph at the 2.5 m du Pont Telescope at Las Campanas Observatory, with observations beginning in early 2017. Observations at both facilities are scheduled to continue through 2020. In keeping with previous SDSS policy, SDSS-IV provides regularly scheduled public data releases; the first one, Data Release 13, was made available in 2016 July.
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| 3. |
- Johnson, Björn, 1971-, et al.
(författare)
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Alcohol drinking among adolescents with native-Swedish and non-European immigrant background : the importance of parental attitudes and peer attitudes for acculturation
- 2021
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Ingår i: Drugs. - : Taylor & Francis. - 0968-7637 .- 1465-3370. ; 28:3, s. 255-266
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Tidskriftsartikel (refereegranskat)abstract
- In this study, we examine differences in alcohol drinking between first- and second-generation non-European immigrant and native-Swedish adolescents. We also examine whether parental and peer attitudes toward alcohol are associated with the acculturation of drinking habits among adolescents with an immigrant background. The study is cross-sectional and based on a school survey conducted in 2016–2019 in eight municipalities in southern Sweden. The sample consists of 3743 adolescents in year 9 of compulsory education, aged 14–15 years, of which 538 (14.4%) had a non-European immigrant background. Non-European immigrant adolescents reported significantly lower levels of drinking than native-Swedish adolescents. Second-generation immigrants reported a higher level of consumption than first-generation immigrants, and among first-generation adolescents, drinking was more prevalent the longer the adolescents had resided in Sweden, which suggests acculturation of drinking habits. This acculturation is mainly related to changes in peer attitudes toward alcohol. Immigrant adolescents with a longer stay in Sweden reported having friends with more positive attitudes toward alcohol. Among first-generation immigrants, drinking was more common among boys than girls. These differences were primarily found among immigrant adolescents with a relatively short period of residence in Sweden, which suggests that acculturation occurs more quickly among boys than among girls.
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| 4. |
- Kapetanovic, Sabina, 1980-, et al.
(författare)
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Validation of the Super-Brief Pathological Narcissism Inventory (SB-PNI) among Swedish adolescents
- 2024
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Ingår i: Current Psychology. - : Springer Nature. - 1046-1310 .- 1936-4733.
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Tidskriftsartikel (refereegranskat)abstract
- This study examines the psychometric structure and properties of the Swedish version of the Super-Brief Pathological Narcissism Inventory (SB-PNI) among adolescents. In order to ensure the validity and feasibility of the measure, we examined the factor structure, measurement invariance across gender, age and ethnicity, and construct validity in relation to a number of correlates of narcissism in adolescence. Data were drawn from a large cross-sectional survey conducted in 35 schools in southern Sweden. The sample consisted of N = 5313 adolescents (Mage = 16.10 SD = 1.55) with 52.2% girls, 45.9% boys and 1.8% adolescents with unspecified gender, from compulsory and upper secondary schools in southern Sweden. The results showed that the measure holds a two-factor structure, suggesting the use of the subscales grandiosity and vulnerability separately, rather than as a unidimensional measure. The correlated factors grandiosity and vulnerability yielded full configural and metric invariance across gender, age, and ethnicity. Both grandiosity and vulnerability were correlated with externalizing and internalizing symptoms, as well as with low self-esteem. The study provides evidence for the utility of the SB-PNI among Swedish adolescents and indicates that the measure can be used across male and female adolescents of different ages and ethnic groups.
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| 5. |
- Svensson, Robert, et al.
(författare)
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A community intervention to reduce alcohol consumption and drunkenness among adolescents in Sweden : a quasi-experiment
- 2021
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Ingår i: BMC Public Health. - : BioMed Central. - 1471-2458. ; 21:1
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Several studies have examined the effect of community interventions on youth alcohol consumption, and the results have often been mixed. The aim of this study is to evaluate the effectiveness of a community intervention known as the Öckerö Method on adolescent alcohol consumption and perceived parental attitudes towards adolescent drinking.METHOD: The study is based on a quasi-experimental design, using matched controls. Self-report studies were conducted among adolescents in grades 7-9 of compulsory education in four control and four intervention communities in the south of Sweden in 2016-2018. Baseline measures were collected in autumn 2016 before the intervention was implemented in the intervention communities. Outcomes were the adolescents' alcohol consumption, past-year drunkenness, past-month drunkenness and perceived parental attitudes towards alcohol.RESULTS: Estimating Difference-in-Difference models using Linear Probability Models, we found no empirical evidence that the intervention has any effect on adolescents' drinking habits, or on their perceptions of their parents' attitudes towards adolescent drinking.CONCLUSION: This is the first evaluation of this method, and we found no evidence that the intervention had any effect on the level of either young people's alcohol consumption or their past-year or past-month drunkenness, nor on their parents' perceived attitudes toward adolescent drinking. A further improvement would be to employ a follow-up period that is longer than the three-year period employed in this study.TRIAL REGISTRATION: ISRCTN registry: Study ID: 51635778 , 31th March 2021 (Retrospectively registered).
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| 6. |
- Svensson, Robert, et al.
(författare)
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Does gender matter? The association between different digital media activities and adolescent well-being
- 2022
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Ingår i: BMC Public Health. - : BioMed Central. - 1471-2458. ; 22, s. 1-10
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Tidskriftsartikel (refereegranskat)abstract
- Background:Previous research on the relationship between social media use and well-being in adolescents has yielded inconsistent results. We addressed this issue by examining the association between various digital media activities, including a new and differentiated measure of social media use, and well-being (internalizing symptoms) in adolescent boys and girls.Method:The sample was drawn from the four cross-sectional surveys from the Öckerö project (2016–2019) in eight municipalities in southern Sweden, consisting of 3957 adolescents in year 7 of compulsory education, aged 12–13. We measured the following digital media activities: playing games and three different activities of social media use (chatting, online sociability, and self-presentation). Our outcome measure was internalizing symptoms. Hypotheses were tested with linear regression analysis.Results:Social media use and playing games were positively associated with internalizing symptoms. The effect of social media use was conditional on gender, indicating that social media use was only associated with internalizing symptoms for girls. Of the social media activities, only chatting and self-presentation (posting information about themselves) were positively associated with internalizing symptoms. Self-presentation was associated with internalizing symptoms only for girls.Conclusion:Our study shows the importance of research going beyond studying the time spent on social media to examine how different kinds of social media activities are associated with well-being. Consistent with research in psychology, our results suggest that young girls posting information about themselves (i.e. self-presentation) might be especially vulnerable to display internalizing symptoms.
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| 7. |
- Svensson, Robert, et al.
(författare)
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Does it matter in what family constellations adolescents live? Reconsidering the relationship between family structure and delinquent behaviour.
- 2022
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Ingår i: PLOS ONE. - : PLoS. - 1932-6203. ; 17:4
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: This study examines the associations between ten family structure types and delinquency, including four groups of symmetrical and asymmetrical living arrangements. We also adjust for attachment to parents and parental monitoring.METHODS: Data are drawn from four cross-sectional surveys conducted between 2016 and 2019 in southern Sweden. The sample consists of 3,838 adolescents, aged 14-15. Negative binomial models were used to calculate the associations between family structure and delinquency.RESULTS: The results show that those living in single-father, single-mother, father-stepmother, mother-stepfather families report significantly more delinquency than adolescents living with both their parents. Adolescents living in "symmetrical" family arrangements, i.e. both parents are single or have a new partner, reported lower levels of delinquency, whereas adolescents living in "asymmetrical" family arrangements, i.e. where either the mother or the father, but not both, have a new partner, reported higher levels of delinquency. Most of the associations between family structure and delinquency decline when adjusted for attachment to parents and parental monitoring.DISCUSSION: This study shows that it is important to move on to the use of more detailed categorisations of family structure in relation to delinquency. We need to increase our knowledge about the group of adolescents that moves between parents and especially about the different constellations of asymmetrical and symmetrical living arrangements.
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| 8. |
- Svensson, Robert, et al.
(författare)
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For Whom Do Unstructured Activities Matters? The Interaction Between Unstructured and Structured Activities in Delinquency and Cannabis Use : A National Self-Report Study
- 2023
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Ingår i: Crime and delinquency. - : Sage Publications. - 0011-1287 .- 1552-387X. ; 69:10, s. 2022-2045
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Tidskriftsartikel (refereegranskat)abstract
- This study examines whether unstructured and structured activities interact in their association with delinquency and cannabis use. We hypothesize that unstructured activities are more strongly associated with delinquency and cannabis use for those who are less engaged in structured activities. Data are drawn from three nationally representative self-report studies conducted between 2005 and 2011 in Sweden, and include 19,644 adolescents. The results support the hypothesis that unstructured activities interact with structured activities in the association with delinquency and cannabis use. The association between unstructured activities and these outcomes is stronger for those with lower levels of structured activities. Sporting activities constitute the structured activity that most clearly interacts with unstructured activities in the association with delinquency and cannabis use.
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| 9. |
- Svensson, Robert, et al.
(författare)
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Internet use and adolescent drinking : Does it matter what young people do online?
- 2020
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Ingår i: Drug And Alcohol Dependence. - : Elsevier. - 0376-8716 .- 1879-0046. ; 213, s. 1-6
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Tidskriftsartikel (refereegranskat)abstract
- BackgroundIn this study we examine whether the association between internet use and drinking could be different for different types of internet activities among adolescents. We also adjust for a number of theoretically relevant factors such as peer influence, unstructured activities, impulsivity and parental monitoring.MethodThe data are drawn from four cross-sectional surveys from the years 2016–2019 in eight municipalities in southern Sweden. The sample consist of 3733 adolescents in year 9 of compulsory education, aged 14–15.ResultsThe results show that there is an association between internet activities and drinking and that there are differences depending on what young people do online. Self-presentation and online sociality are both positively associated with drinking, whereas news consumption and playing games are negatively associated with drinking. The results also show that the association between the different internet activities and drinking becomes weaker when adjusting for the control variables.ConclusionThis study suggests that more research is needed to examine the correlations between different forms of internet activities and drinking among adolescents in more detail.
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| 10. |
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The Seventeenth Data Release of the Sloan Digital Sky Surveys : Complete Release of MaNGA, MaStar, and APOGEE-2 Data
- 2022
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Ingår i: Astrophysical Journal Supplement Series. - : Institute of Physics (IOP). - 0067-0049 .- 1538-4365. ; 259:2
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Tidskriftsartikel (refereegranskat)abstract
- This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the complete release of the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, which reached its goal of surveying over 10,000 nearby galaxies. The complete release of the MaNGA Stellar Library accompanies this data, providing observations of almost 30,000 stars through the MaNGA instrument during bright time. DR17 also contains the complete release of the Apache Point Observatory Galactic Evolution Experiment 2 survey that publicly releases infrared spectra of over 650,000 stars. The main sample from the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), as well as the subsurvey Time Domain Spectroscopic Survey data were fully released in DR16. New single-fiber optical spectroscopy released in DR17 is from the SPectroscipic IDentification of ERosita Survey subsurvey and the eBOSS-RM program. Along with the primary data sets, DR17 includes 25 new or updated value-added catalogs. This paper concludes the release of SDSS-IV survey data. SDSS continues into its fifth phase with observations already underway for the Milky Way Mapper, Local Volume Mapper, and Black Hole Mapper surveys.
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