| 1. |
- Bejgarn, Therese, et al.
(författare)
-
Palaeoproterozoic porphyry Cu-Au, intrusion-hosted Au and ultramafic Cu-Ni deposits in the Fennoscandian Shield: Temporal constraints using U-Pb geochronology
- 2013
-
Ingår i: Lithos. - : Elsevier BV. - 0024-4937 .- 1872-6143. ; 174, s. 236-254
-
Tidskriftsartikel (refereegranskat)abstract
- The Skellefte district, northern Sweden, is known for the occurrence of 1.89 Ga Palaeoproterozoic volcanogenic massive sulphide (VMS) deposits. The deposits are hosted by the older part of a volcanosedimentary succession, which was intruded at 1.88-1.86 Ga by multiple phases of the syn-volcanic, early orogenic Jorn intrusive complex (JIC). The oldest phase of the JIC hosts different styles of mineralisation, among them porphyry Cu-Mo-Au, intrusion-related Au, and mafic-hosted Fe and Cu-Ni deposits. To discriminate between the different intrusive and ore related events, U-Pb ages of zircons have been obtained for nine intrusive phases and from Na-Ca alteration spatially related to mineralisation, while U-Pb ages of baddeleyite (ZrO2) have been used to constrain intrusive ages of three mineralised and barren mafic-ultramafic intrusive rocks. The two main JIC intrusive phases of a granodioritic-tonalitic composition in the southern study area intruded at 1887 +/- 3 Ma and 1886 +/- 3 Ma, respectively, and were succeeded by the intrusion of layered mafic-ultramafic intrusive rocks in the northern and southern study area at 1879 +/- 1 Ma and 1884 +/- 2 Ma, respectively. Emplacement of porphyry dykes took place at ca. 1877 Ma in the southern, western and northern JIC. The dykes are spatially and temporally associated with formation of porphyry style mineralisation, alteration and Au-mineralisation, as inferred from 1879 +/- 5 Ma zircons in adjacent Na-Ca alteration zones. High SiO2 and Al2O3 contents together with high Sr/Y ratios, mingling structures, mafic xenoliths and hornblende phenocrysts in the porphyry dykes suggest that the magma originated from hydrated partial melts, possibly from the base of the crust at a mature stage of subduction. Local extension resulted in intrusion of mafic-ultramafic rocks around 1.88 Ga prior to and after, the porphyry dykes and associated mineralisation, approximately 10 Ma after the formation of the spatially related 1.89 Ga VMS deposits in the Skellefte district. This 1.88 Ga event correlates with other 1.88 Ga mafic-ultramafic units widespread around the world, and could possibly be interpreted as a large scale response to supercontinent formation. (C) 2012 Elsevier B.V. All rights reserved.
|
|
| 2. |
- Bejgarn, Therese, et al.
(författare)
-
Tectonomagmatic aspects of intrusive hosted Cu-Au-Mo deposits in the Skellefte District, northern Sweden
- 2013
-
Ingår i: Mineral deposit research for a high-tech world. - Uppsala : Sveriges Geologiska Undersökning. - 9789174032079 ; , s. 770-773
-
Konferensbidrag (refereegranskat)abstract
- The Algtrask gold deposit and several low grade base metal deposits, e.g. the Tallberg porphyry deposit, are hosted by the Jam intrusive complex in the northern part of the Skellefte District, northern Sweden. The intrusive complex was emplaced at 1.89-1.86 Ga in a continental margin volcanic arc setting, and the oldest 1.89 Ga phase is coeval with volcanic rocks within the Skellefte Group, a complex volcano-sedimentary succession hosting numerous VMS deposits. The intrusive hosted deposits are associated with 1.88 Ga quartz-feldspar porphyritic intrusive rocks, which formed from 1.89 Ga recycled crust. Hence, it is interpreted that the intrusive hosted deposits formed when the arc was under transpression-compression, 10 Myr after the spatially related VMS deposits, which formed when the arc was under extension.
|
|
| 3. |
|
|
| 4. |
- Klemetz, Viktor, et al.
(författare)
-
Nationell luftövervakning : Sakrapport med data från övervakning inom Programområde Luft t. o. m. 2021
- 2023
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Naturvårdsverket ansvarar för den nationella luftövervakningen i bakgrundsmiljö. I rapporten redovisas resultat från verksamheten inom Programområde Luft avseende mätningar (genomförda av IVL Svenska Miljöinstitutet (IVL),Institutionen för Miljövetenskap vid Stockholms universitet (SU), Institutionen för Mark och Miljö vid Sveriges lantbruksuniversitet (SLU), Chalmers tekniska högskola och Sveriges meteorologiska och hydrologiska institut (SMHI) till och med 2021 samt regionala modellberäkningar (utförda av SMHI) till och med 2020. För flertalet av de luftföroreningskomponenter som övervakas inom den nationella miljöövervakningen har det, sedan mätningarna startade för mellan 20 och 45 år sedan, generellt skett en avsevärd förbättring avseende såväl halter i luft som deposition i bakgrundsmiljö.Utvecklingen har dock varierat i något olika utsträckning beroende på komponenter och lokalisering i landet. Föroreningsbelastningen är oftast lägre ju längre norrut i landet man kommer.För de flesta ämnen som det finns miljökvalitetsnormer (MKN) respektive miljömål för ligger halterna avsevärt lägre än angivna gräns- och målvärden. Halterna av marknära ozon överskrider i dagsläget MKN för hälsa vid ett flertal mätstationer i södra Sverige.För såväl partiklar (i form av PM2,5) och bensen (i urban bakgrund) är risken låg att haltnivåer överstiger miljömålens preciseringar.
|
|
| 5. |
- Madison, Guy, et al.
(författare)
-
Can gender studies be studied? : Reply to comments on Söderlund and Madison
- 2016
-
Ingår i: Scientometrics. - : Springer. - 0138-9130 .- 1588-2861. ; 108:1, s. 329-335
-
Tidskriftsartikel (refereegranskat)abstract
- We reply to the comment by Lundgren, Shildrick and Lawrence on our article on gender studies bibliometrics and argue that it does not challenge any of our main results. Their points of criticism concerned that we had not compiled exactly all scholarly gender production, that the gender studies field had changed during the period, that the definition of the research area is vague, and suggest that only gender studies scholars themselves are able to study the field. We maintain that constructive scientific critique should specify alternative methods and how they are expected to change the results and conclusions, and why that would be preferable. Without such stringency, it reduces to regressive lists of detail.
|
|
| 6. |
- Madison, Guy, et al.
(författare)
-
Comparisons of content and scientific quality indicators across peer-reviewed journal articles with more or less gender perspective : gender studies can do better
- 2018
-
Ingår i: Scientometrics. - : Springer. - 0138-9130 .- 1588-2861. ; 115:3, s. 1161-1183
-
Tidskriftsartikel (refereegranskat)abstract
- The field of gender studies has faced criticism for poor scholarship and methodology, both from within and outside academia. Here, we compare indicators of scientific quality across three samples of peer-reviewed journal articles with more, less and no gender perspective, on the assumption that gender studies tend to apply a gender perspective. The statements in the articles were content-analysed with respect to subject matter, their level of support in surrounding text, and other indicators of scientific quality. The higher the level of gender perspective, the lower was the scientific quality for seven out of nine indicators. Support was higher for the no gender perspective group, but did not differ across the two higher levels. We suggest that the impact of the field can be increased by implementing established research methods employed in other disciplines, especially in terms of bringing about desired social and societal change.
|
|
| 7. |
- Söderlund, Robert, et al.
(författare)
-
Prevalence and genomic characteristics of zoonotic gastro-intestinal pathogens and ESBL/pAmpC producing Enterobacteriaceae among Swedish corvid birds
- 2019
-
Ingår i: Infection Ecology & Epidemiology. - : Taylor & Francis. - 2000-8686 .- 2000-8686. ; 9:1
-
Tidskriftsartikel (refereegranskat)abstract
- Introduction: Wild birds pose a potential threat to animal and human health by spreading infectious diseases. In the present study, we studied the occurrence of bacterial zoonotic pathogens as well as enterobacteria with transferrable antimicrobial resistance genes among Swedish corvids.Materials and methods: Intestines from 66 jackdaws, crows, rooks and magpies from the vicinity of livestock farms at 14 locations in 7 counties were analysed by direct culture or PCR screening followed by culture. Isolates were investigated by whole-genome sequencing.Results and discussion: Campylobacter jejuni were detected in 82% and Yersinia in 3% of the birds. ESBL-producing E. coli were found in one sample (2%) and carried bla CTX-M-55. No Enterobacteriaceae with transferable carbapenem resistance were identified. No Salmonella or E. coli O157:H7 were found, but PCR analysis for enterohaemorrhagic E. coli virulence genes revealed 35% positive samples for intimin, 9% for verotoxin 1 and 17% for verotoxin 2. C. jejuni isolates from corvids were compared to previously published isolates from Swedish sources by multi-locus sequence typing based on genome sequences. All corvid C. jejuni isolates formed a cluster, intermingled with human and chicken isolates. Our results indicate that C. jejuni is ubiquitous among Swedish corvid birds, with sporadic transmission to poultry and humans.
|
|
| 8. |
- Söderlund, Therese, et al.
(författare)
-
Characteristics of gender studies publications : a bibliometric analysis based on a Swedish population database
- 2015
-
Ingår i: Scientometrics. - : Springer Netherlands. - 0138-9130 .- 1588-2861. ; 105:3, s. 1347-1387
-
Tidskriftsartikel (refereegranskat)abstract
- Gender studies is a growing field in academe. It is intrinsically associated with feminism and political reforms, and has in Sweden enjoyed exclusive resources and legislated support. The present study aims to characterize gender studies published by authors based in Sweden, and poses a number of hypotheses regarding its rate of growth, impact, and other bibliographical variables. To this end, publications concerning gender by authors based at Swedish universities were collected from a range of sources and compiled to form a population database of publications between 2000 and 2010. The results show from which universities and disciplines the gender studies authors come from, and in which journals they are most frequently published. We also compare the proportion of gender studies to the entire body of publications from a number of countries, and show that in Sweden it has grown faster than other types of publications. A comparison between literatures that consider socially constructed gender or biological sex showed that the former is less cited and published in journals with lower IF than the latter. Our Swedish Gender Studies List population database, which also features an international, non-exhaustive comparison sample that is matched to the Swedish sample in certain respects, is made available for further scientific study of this literature, for example by enabling the extraction of random samples.
|
|
| 9. |
- Söderlund, Therese, et al.
(författare)
-
Objectivity and realms of explanation in academic journal articles concerning sex/gender : a comparison of Gender studies and the other social sciences
- 2017
-
Ingår i: Scientometrics. - : Springer Netherlands. - 0138-9130 .- 1588-2861. ; 112:2, s. 1093-1109
-
Tidskriftsartikel (refereegranskat)abstract
- Gender studies (GS) has been challenged on epistemological grounds. Here, we compare samples of peer-reviewed academic journal publications written by GS authors and authors from closely related disciplines in the social sciences. The material consisted of 2805 statements from 36 peer-reviewed journal articles, sampled from the Swedish Gender Studies List, which covers > 12,000 publications. Each statement was coded as expressing a lack of any of three aspects of objectivity: Bias, Normativity, or Political activism, or as considering any of four realms of explanation for the behaviours or phenomena under study: Biology/genetics, Individual/group differences, Environment/culture, or Societal institutions. Statements in GS publications did to a greater extent express bias and normativity, but not political activism. They did also to a greater extent consider cultural, environmental, social, and societal realms of explanation, and to a lesser extent biological and individual differences explanations.
|
|
| 10. |
- Ullén, Fredrik, et al.
(författare)
-
Bottom–up mechanisms are involved in the relation between accuracy in timing tasks and intelligence : further evidence using manipulations of state motivation
- 2012
-
Ingår i: Intelligence. - : Elsevier. - 0160-2896 .- 1873-7935. ; 40:2, s. 100-106
-
Tidskriftsartikel (refereegranskat)abstract
- Intelligence correlates with accuracy in various timing tasks. Such correlations could be due to both bottom–up mechanisms, e.g. neural properties that influence both temporal accuracy and cognitive processing, and differences in top–down control. We have investigated the timing–intelligence relation using a simple temporal motor task, isochronous serial interval production (ISIP), i.e. hand/finger movements with a regular beat. ISIP variability is egatively correlated with intelligence and we have previously argued, based on indirect evidence, that this relation has a bottom–up component. Here, we investigate this question using an experimental within-subject design in two samples (n=38 and n=95 participants, respectively). ISIP was performed under two conditions. In the first condition (Low Motivation), the participants were told that measurements were being made to familiarize them with the task and to calibrate the equipment. In the second condition (High Motivation), the participants were told that the performance would be evaluated and used for scientific analysis, and they were given a monetary reward depending on how accurately they performed. Temporal accuracy in the ISIP was higher during High Motivation than during Low Motivation. In both samples, correlations between ISIP variability and intelligence were similar for both conditions. General linear models with ISIP variability measures as dependent variables, condition (Low Motivation or High Motivation) as a repeated-measures variable and intelligence as a betweensubject variable, revealed a significant effect of intelligence, but no effects of incentive, nor of the intelligence×incentive interaction. We conclude that motivationally driven top–down mechanisms can influence ISIP performance, but that they play no major role for correlations between temporal accuracy in ISIP and intelligence. These results provide further support for that bottom–up mechanisms are involved in relations between temporal accuracy and intelligence.
|
|
