The GW Vir instability strip in the light of new observations of PG 1159 stars. Discovery of pulsations in the central star of Abell 72 and variability of RX J0122.9-7521

We present the results of new time series photometric observations of 29 pre-white dwarf stars of PG 1159 spectral type, carried out in the years 2014-2022. For the majority of stars, a median noise level in Fourier amplitude spectra of 0.5-1.0 mmag was achieved. This allowed the detection of pulsations in the central star of planetary nebula Abell 72, consistent with g-modes excited in GW Vir stars, and variability in RX J0122.9-7521 that could be due to pulsations, binarity or rotation. For the remaining stars from the sample that were not observed to vary, we placed upper limits for variability. After combination with literature data, our results place the fraction of pulsating PG 1159 stars within the GW Vir instability strip at 36%. An updated list of all known PG 1159 stars is provided, containing astrometric measurements from the recent Gaia DR3 data, as well as information on physical parameters, variability, and nitrogen content. Those data are used to calculate luminosities for all PG 1159 stars to place the whole sample on the theoretical Hertzsprung-Russell diagram for the first time in that way. The pulsating stars are discussed as a group, and arguments are given that the traditional separation of GW Vir pulsators in "DOV" and "PNNV" stars is misleading and should not be used.Comment: Accepted for publication in ApJ

SARS-CoV-2 susceptibility and COVID-19 disease severity are associated with genetic variants affecting gene expression in a variety of tissues

Variability in SARS-CoV-2 susceptibility and COVID-19 disease severity between individuals is partly due to genetic factors. Here, we identify 4 genomic loci with suggestive associations for SARS-CoV-2 susceptibility and 19 for COVID-19 disease severity. Four of these 23 loci likely have an ethnicity-specific component. Genome-wide association study (GWAS) signals in 11 loci colocalize with expression quantitative trait loci (eQTLs) associated with the expression of 20 genes in 62 tissues/cell types (range: 1:43 tissues/gene), including lung, brain, heart, muscle, and skin as well as the digestive system and immune system. We perform genetic fine mapping to compute 99% credible SNP sets, which identify 10 GWAS loci that have eight or fewer SNPs in the credible set, including three loci with one single likely causal SNP. Our study suggests that the diverse symptoms and disease severity of COVID-19 observed between individuals is associated with variants across the genome, affecting gene expression levels in a wide variety of tissue types

A first update on mapping the human genetic architecture of COVID-19

peer reviewe

Electronic Books and Libraries : a Critical Discourse Analysis of Biblioteksbladet 2005-2011

The aim of this two years master´s thesis is to examine discourses about electronic books in relation to libraries that occur in the Swedish library journal Biblioteksbladet by using critical discourse analysis (CDA). The thesis also aims to discuss changes in the discourse practice, and discuss the relationship between discourse practice and social practice in the field of library and information science (LIS). A main point of CDA is that language is a form of social practice that helps shape social reality. Furthermore the concept of ideology, as understood with-in CDA, brings understanding to the way discursive events help reproduce and transform social relations of pow-er. The text samples span from 2005 up to and including 2011 and were examined by using Norman Fairclough´s three-dimensional conception of discourse, which allows for interpretation of text on a linguistic, discursive and social level. The result of the analysis showed that there are several different discourses about electronic books and li-braries, none of which can be said to be particularly representative. Electronic books are to some extent portrayed in a deterministic fashion, and there were four particular ways that electronic books were constructed as subject matter, namely by using economic discourse, service discourse, commercial discourse and democratic discourse. Pronounced discursive change was observed with the introduction of the democratic discourse, together with an introduction of pessimistic discourses on electronic books during 2010-2011. When discourses were analyzed in relation to social practices in the field of LIS it was found that the discursive practices in several aspects reflected existing systems of knowledge and belief

Electronic Books and Libraries : a Critical Discourse Analysis of Biblioteksbladet 2005-2011

The aim of this two years master´s thesis is to examine discourses about electronic books in relation to libraries that occur in the Swedish library journal Biblioteksbladet by using critical discourse analysis (CDA). The thesis also aims to discuss changes in the discourse practice, and discuss the relationship between discourse practice and social practice in the field of library and information science (LIS). A main point of CDA is that language is a form of social practice that helps shape social reality. Furthermore the concept of ideology, as understood with-in CDA, brings understanding to the way discursive events help reproduce and transform social relations of pow-er. The text samples span from 2005 up to and including 2011 and were examined by using Norman Fairclough´s three-dimensional conception of discourse, which allows for interpretation of text on a linguistic, discursive and social level. The result of the analysis showed that there are several different discourses about electronic books and li-braries, none of which can be said to be particularly representative. Electronic books are to some extent portrayed in a deterministic fashion, and there were four particular ways that electronic books were constructed as subject matter, namely by using economic discourse, service discourse, commercial discourse and democratic discourse. Pronounced discursive change was observed with the introduction of the democratic discourse, together with an introduction of pessimistic discourses on electronic books during 2010-2011. When discourses were analyzed in relation to social practices in the field of LIS it was found that the discursive practices in several aspects reflected existing systems of knowledge and belief

Electronic Books and Libraries : a Critical Discourse Analysis of Biblioteksbladet 2005-2011

The aim of this two years master´s thesis is to examine discourses about electronic books in relation to libraries that occur in the Swedish library journal Biblioteksbladet by using critical discourse analysis (CDA). The thesis also aims to discuss changes in the discourse practice, and discuss the relationship between discourse practice and social practice in the field of library and information science (LIS). A main point of CDA is that language is a form of social practice that helps shape social reality. Furthermore the concept of ideology, as understood with-in CDA, brings understanding to the way discursive events help reproduce and transform social relations of pow-er. The text samples span from 2005 up to and including 2011 and were examined by using Norman Fairclough´s three-dimensional conception of discourse, which allows for interpretation of text on a linguistic, discursive and social level. The result of the analysis showed that there are several different discourses about electronic books and li-braries, none of which can be said to be particularly representative. Electronic books are to some extent portrayed in a deterministic fashion, and there were four particular ways that electronic books were constructed as subject matter, namely by using economic discourse, service discourse, commercial discourse and democratic discourse. Pronounced discursive change was observed with the introduction of the democratic discourse, together with an introduction of pessimistic discourses on electronic books during 2010-2011. When discourses were analyzed in relation to social practices in the field of LIS it was found that the discursive practices in several aspects reflected existing systems of knowledge and belief

Open Access Publishing at the KTH Royal Institute of Technology : Statistics for 2011 – 2016

During 2011, a policy for scholarly publishing was implemented at KTH.1 The policy states that researchers at KTH should strive to publish open access, either through well-reputed open accessjournals or by self-archiving in KTH publication database DiVA. Publications published by KTH – i.e. dissertations, bachelor and master theses, reports – are to be self-archived in DiVA as a general rule. In this report, shares and trends of open access publishing at KTH are analysed starting from the same year the policy was implemented, in 2011. A report that analyses open access at KTH will be released annually.QC 20191211</p

Open Access Publishing at the KTH Royal Institute of Technology : Statistics for 2011 – 2016

During 2011, a policy for scholarly publishing was implemented at KTH.1 The policy states that researchers at KTH should strive to publish open access, either through well-reputed open accessjournals or by self-archiving in KTH publication database DiVA. Publications published by KTH – i.e. dissertations, bachelor and master theses, reports – are to be self-archived in DiVA as a general rule. In this report, shares and trends of open access publishing at KTH are analysed starting from the same year the policy was implemented, in 2011. A report that analyses open access at KTH will be released annually.QC 20191211</p

Samverkan mellan forskare och bibliotek : Mot en förändrad syn på publiceringsstrategier

Universitets- och högskolebiblioteken har i allt större utsträckning fått en viktig roll att spela i spridandet av det egna lärosätets forskning. Detta ger utrymme för samarbete mellan bibliotek och forskare: biblioteket behöver kunskap om de faktorer som styr hur forskarna väljer att sprida sina resultat, för att i sin tur kunna ge forskarna stöd i valet av publiceringskanaler och publiceringsstrategier. I detta paper undersöker vi attityder och strategier hos fyra forskare med anknytning till Kungliga Tekniska högskolans bibliotek, samt föreslår möjliga vägar till samverkan mellan bibliotek och forskare.QC 20150116</p

Samverkan mellan forskare och bibliotek : Mot en förändrad syn på publiceringsstrategier

Universitets- och högskolebiblioteken har i allt större utsträckning fått en viktig roll att spela i spridandet av det egna lärosätets forskning. Detta ger utrymme för samarbete mellan bibliotek och forskare: biblioteket behöver kunskap om de faktorer som styr hur forskarna väljer att sprida sina resultat, för att i sin tur kunna ge forskarna stöd i valet av publiceringskanaler och publiceringsstrategier. I detta paper undersöker vi attityder och strategier hos fyra forskare med anknytning till Kungliga Tekniska högskolans bibliotek, samt föreslår möjliga vägar till samverkan mellan bibliotek och forskare.QC 20150116</p