| 1. |
- Ammert, Niklas, 1968-, et al.
(författare)
-
Inledning
- 2014. - 1
-
Ingår i: Blickar. - Växjö : Linnaeus University Press. - 9789187925344 ; , s. 5-11
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)
|
|
| 2. |
|
|
| 3. |
- Brown, A. G. A., et al.
(författare)
-
Gaia Data Release 1 Summary of the astrometric, photometric, and survey properties
- 2016
-
Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 595
-
Tidskriftsartikel (refereegranskat)abstract
- Context. At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7. Aims. A summary of Gaia DR1 is presented along with illustrations of the scientific quality of the data, followed by a discussion of the limitations due to the preliminary nature of this release. Methods. The raw data collected by Gaia during the first 14 months of the mission have been processed by the Gaia Data Processing and Analysis Consortium (DPAC) and turned into an astrometric and photometric catalogue. Results. Gaia DR1 consists of three components: a primary astrometric data set which contains the positions, parallaxes, and mean proper motions for about 2 million of the brightest stars in common with the HIPPARCOS and Tycho-2 catalogues - a realisation of the Tycho-Gaia Astrometric Solution (TGAS) - and a secondary astrometric data set containing the positions for an additional 1.1 billion sources. The second component is the photometric data set, consisting of mean G-band magnitudes for all sources. The G-band light curves and the characteristics of similar to 3000 Cepheid and RR Lyrae stars, observed at high cadence around the south ecliptic pole, form the third component. For the primary astrometric data set the typical uncertainty is about 0.3 mas for the positions and parallaxes, and about 1 mas yr(-1) for the proper motions. A systematic component of similar to 0.3 mas should be added to the parallax uncertainties. For the subset of similar to 94 000 HIPPARCOS stars in the primary data set, the proper motions are much more precise at about 0.06 mas yr(-1). For the secondary astrometric data set, the typical uncertainty of the positions is similar to 10 mas. The median uncertainties on the mean G-band magnitudes range from the mmag level to similar to 0.03 mag over the magnitude range 5 to 20.7. Conclusions. Gaia DR1 is an important milestone ahead of the next Gaia data release, which will feature five-parameter astrometry for all sources. Extensive validation shows that Gaia DR1 represents a major advance in the mapping of the heavens and the availability of basic stellar data that underpin observational astrophysics. Nevertheless, the very preliminary nature of this first Gaia data release does lead to a number of important limitations to the data quality which should be carefully considered before drawing conclusions from the data.
|
|
| 4. |
- Clementini, G., et al.
(författare)
-
Testing parallaxes with local Cepheids and RR Lyrae stars
- 2017
-
Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 605
-
Tidskriftsartikel (refereegranskat)abstract
- Context. Parallaxes for 331 classical Cepheids, 31 Type II Cepheids, and 364 RR Lyrae stars in common between Gaia and the HIPPARCOS and Tycho-2 catalogues are published in Gaia Data Release 1 (DR1) as part of the Tycho-Gaia Astrometric Solution (TGAS). Aims. In order to test these first parallax measurements of the primary standard candles of the cosmological distance ladder, which involve astrometry collected by Gaia during the initial 14 months of science operation, we compared them with literature estimates and derived new period-luminosity (PL), period-Wesenheit (PW) relations for classical and Type II Cepheids and infrared PL, PL-metallicity (PLZ), and optical luminosity-metallicity (MV-[Fe/H]) relations for the RR Lyrae stars, with zero points based on TGAS.Methods. Classical Cepheids were carefully selected in order to discard known or suspected binary systems. The final sample comprises 102 fundamental mode pulsators with periods ranging from 1.68 to 51.66 days (of which 33 with sigma(omega)/omega < 0 : 5). The Type II Cepheids include a total of 26 W Virginis and BL Herculis stars spanning the period range from 1.16 to 30.00 days (of which only 7 with sigma(omega)/omega 0 : 5). The RR Lyrae stars include 200 sources with pulsation period ranging from 0.27 to 0.80 days (of which 112 with sigma(omega)/omega < 0 : 5). The new relations were computed using multi- band (V; I; J; K-s) photometry and spectroscopic metal abundances available in the literature, and by applying three alternative approaches: (i) linear least-squares fitting of the absolute magnitudes inferred from direct transformation of the TGAS parallaxes; (ii) adopting astrometry-based luminosities; and (iii) using a Bayesian fitting approach. The last two methods work in parallax space where parallaxes are used directly, thus maintaining symmetrical errors and allowing negative parallaxes to be used. The TGAS-based PL; PW; PLZ, and MV [Fe/H] relations are discussed by comparing the distance to the Large Magellanic Cloud provided by different types of pulsating stars and alternative fitting methods.Results. Good agreement is found from direct comparison of the parallaxes of RR Lyrae stars for which both TGAS and HST measurements are available. Similarly, very good agreement is found between the TGAS values and the parallaxes inferred from the absolute magnitudes of Cepheids and RR Lyrae stars analysed with the Baade-Wesselink method. TGAS values also compare favourably with the parallaxes inferred by theoretical model fitting of the multi-band light curves for two of the three classical Cepheids and one RR Lyrae star, which were analysed with this technique in our samples. The K-band PL relations show the significant improvement of the TGAS parallaxes for Cepheids and RR Lyrae stars with respect to the HIPPARCOS measurements. This is particularly true for the RR Lyrae stars for which improvement in quality and statistics is impressive.Conclusions. TGAS parallaxes bring a significant added value to the previous HIPPARCOS estimates. The relations presented in this paper represent the first Gaia-calibrated relations and form a work-in-progress milestone report in the wait for Gaia-only parallaxes of which a first solution will become available with Gaia Data Release 2 (DR2) in 2018.
|
|
| 5. |
- Elfgren, Christina, et al.
(författare)
-
Subjective experience of memory deficits related to clinical and neuroimaging findings.
- 2003
-
Ingår i: Dementia and Geriatric Cognitive Disorders. - : S. Karger AG. - 1420-8008 .- 1421-9824. ; 16:2, s. 84-92
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to evaluate cognitive impairment, psychiatric symptoms and cerebral blood flow (CBF) patterns in middle-aged (35–64 years) and younger old patients (65–74 years) with subjective experience of memory deficits. The study group was heterogeneous with patients fulfilling criteria for dementia, as well as patients with mild cognitive impairment (MCI) and with non-verified cognitive impairment (non-MCI). Seventy per cent of the non-MCI patients reported long-lasting experiences of psychosocial stress tentatively causing the memory problems. The MCI patients were subdivided into two groups: MCI type 1 included patients with isolated memory impairment, while MCI type 2 included patients with memory impairment together with slight verbal and/or visuospatial impairments. CBF measurements comparing the two MCI groups with the non-MCI group were performed. The MCI type 2 showed reduced CBF in the left anterior medial temporal lobe as well as in parts of the posterior cingulate gyrus. The CBF pattern in MCI type 2 concurs with the pathophysiological process of Alzheimer’s disease. The results indicate that it is important to make a subdivision of MCI patients regarding the presence of isolated memory impairments or memory impairments together with other slight cognitive deficits.
|
|
| 6. |
-
En båge genom tiden - ritualer kring en göteborgshistoria. Om Flickläroverket i Artisten
- 2024
-
Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- 1929 bildades Göteborgs första Högre allmänna läroverk för Flickor – Flickläroverket som fick en byggnad 1935 i det kulturella centrumet, Götaplatsen. Efter några år som Kjellbergska gymnasiet, sedan Komvux, blev byggnaden del av Artisten, Högskolan för scen och musik, HSM 1992. Byggnaden har burit kvinnors utbildning, konst och kultur över många generationer, en minneskedja som nu är bruten. Boken - En båge genom tiden – ritualer kring en göteborgshistoria – en konst- och forskningsantologi – är resultatet av de offentliga minnesdagar där de deltagande drygt 200 kvinnorna (70– 97 år) som varit elever på Flickläroverket, studenter vid Artisten, konstnärer och forskare – bidrog till och deltog i gestaltande ritualer, minnesrum, dans, utställningar och samtal som gav liv åt en utbildningskultur och konst som berört samhället i generationer. I boken bidrar ett 20-tal Göteborgsbaserade konstnärer och forskare med olika perspektiv på byggnadens poetiska, sociala och konstnärliga dimensioner. Bland annat beskrivs återskapandet av Bågdansen, som dansades varje år vid Lucia mellan 1934-1972. Här beskrivs även den medie-debatt som ledde till räddningen av målningen Dansen av Nils Nilsson från 1935 och hur nedtagningen gick till. Tillsammans med ett rikt foto- och bildmaterial, filmdokumentationer och ett ljudarkiv utgör boken ett tidsdokument där konst fungerar som minnesbärare över tid och rum.
|
|
| 7. |
- Eriksson, Marie, 1969-
(författare)
-
Makar emellan : Äktenskaplig oenighet och våld på kyrkliga och politiska arenor, 1810-1880
- 2010
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This dissertation examines the discussion that took place during the 19th century surrounding men’s violence against their wives, as well as the contemporary norms and ideas that shaped people’s understanding of, and ability to deal with the problem. The overall objective is to examine how cultural conceptions of gender, class, violence and power (relationships) were created and expressed during the period 1810–1880. I approach this objective through an examination of how men’s violence against their wives was reported and treated as marital conflict, both within local religious arenas (such as church councils and cathedral chapters) and in the Riksdag of the Estates.With a longer diachronic analysis of the discussions in the Riksdag of the Estates con-cerning propositions for changes in the law regarding marital conflict and divorce during the period 1828–1860, the dissertation shows that men’s violence against their wives as well as other forms of male misuse of power were neither made invisible, privatised nor marginalised in the public discussion in Sweden, which previous research has maintained. In contrast to previous research, the dissertation also shows that political attention to wife-beating and the reform work that took place in 19th century Sweden cannot be entirely characterised as a secularised project. The attention politicians directed towards the problem took place in a re-ligious context where the clergy, in practice, through their experience of dealing with wife-beating and other unsatisfactory conditions in marital relations, took the initiative and were instigators in the political process that after the middle of the century brought changes in the law on marital conflict and divorce.The dissertation’s investigations of how marital conflict and violence were dealt with by church councils and cathedral chapters also show how those involved talked about marital conflict based on competing ideas of gender, class, violence and marriage. The dissertation supports previous research that has demonstrated how men’s violence against their wives tended to be made invisible when it was interpreted and dealt with as marital conflict within the religious arenas. However, the results of the dissertation open up for other interpreta-tional perspectives regarding how violence was made invisible in the past, demonstrating that the prevailing understanding of violence that existed through concepts such as conflict and maltreatment may rather have resulted in an exposition of violence, which also included other forms of marital violence and oppression that were not physical. With a starting point in a marital ideology that perceived marriage as being in principle life-long, the intention of the church’s warnings during conflicts was to mediate, even in cases that included men’s vio-lence against their wives. The principal significance was not to make it easier for wives to remove themselves from their husbands’ violence, but to preserve the sanctity of marriage. Despite this, the study of praxis during the period shows that the church councils in particu-lar could assume more flexible and pragmatic attitudes towards the law. In their attempts to find solutions to their congregation’s unsatisfactory state of marital problems, they could even pursue actions that conflicted with legal provisions.
|
|
| 8. |
- Holmér, Gunnel, 1955-
(författare)
-
Flaskor på löpande band : Arbete och arbetskraftsrekrytering vid Surte glasbruk 1943-1978
- 2017
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This dissertation considers how the transition from craft manufacture to mechanized glass production affected the organization of work and the consequences for the recruitment of labour. Based on gender and ethnicity, the dissertation studies the composition of the workforce, the significance of qualifications, and differences in career paths and length of stay have been investigated at Surte glassworks 1943–1978. Charles Tilly’s theory of durable inequality is applied to analyse whether primarily gender and ethnicity had any effect on the assignment of tasks and on discrimination. In conclusion, the results from Surte are compared with conditions at Kosta glassworks. Whereas Surte’s specialty was machine-made bottles, Kosta was geared to craft production of utility glass and art glass.After mechanization at Surte, machine-tenders were counted among the most qualified category, instead of the glass-blowers who had previously been in demand. Manufacture at a pace regulated by machines led to more routine chores such as inspection and packaging. At Kosta, with its focus on craft, glass-blowers still had the highest positions and had learned glass-blowing in the traditional way through practical exercise. At neither Surte nor Kosta did women have any opportunity to receive comparable training.After the Second World War there was a growing need for labour at both Surte and Kosta, and to keep production going the main alternative was foreign labour. The peak was reached in the 1960s, and of roughly 660 collectively employed workers at Surte in November 1964, almost 40% were immigrants, chiefly from Finland. Kosta at the same time, with just under 330 employees, had slightly under 10% foreign workers, mainly from Greece. Kosta attracted a number of skilled glass-workers from abroad, but the majority of immigrants there, and all those at Surte, lacked experience of glass manufactureAt neither Surte nor Kosta, with their different production methods, is there any evidence of durable inequality based on ethnicity. The assignment of tasks was guided rather by the functions in demand at the companies and by the applicants’ qualifications. Internal training and career opportunities were open to all male workers, regardless of which country they came from. On the other hand, the gender division of labour at both glassworks created durable inequality for all women regardless of nationality.
|
|
| 9. |
|
|
| 10. |
- Kokfelt, Ulla, et al.
(författare)
-
Ecosystem responses to increased precipitation and permafrost decay in subarctic Sweden inferred from peat and lake sediments
- 2009
-
Ingår i: Global Change Biology. - : Wiley. - 1354-1013 .- 1365-2486. ; 15:7, s. 1652-1663
-
Tidskriftsartikel (refereegranskat)abstract
- Recent accelerated decay of discontinuous permafrost at the Stordalen Mire in northern Sweden has been attributed to increased temperature and snow depth, and has caused expansion of wet minerotrophic areas leading to significant changes in carbon cycling in the mire. In order to track these changes through time and evaluate potential forcing mechanisms, this paper analyses a peat succession and a lake sediment sequence from within the mire, providing a record for the last 100 years, and compares these with monitored climate and active layer thickness data. The peat core was analysed for testate amoebae to reconstruct changes in peatland surface moisture conditions and water table fluctuations. The lake sediment core was analysed by near infrared spectroscopy to infer changes in the total organic carbon (TOC) concentration of the lake-water, and changes in δ13C and C, N and δ15N to track changes in the dissolved inorganic carbon (DIC) pool and the influence of diagenetic effects on sediment organic matter, respectively. Results showed that major shifts towards increased peat surface moisture and TOC concentration of the lake-water occurred around 1980, one to two decades earlier than a temperature driven increase in active layer thickness. Comparison with monitored temperature and precipitation from a nearby climate station indicates that this change in peat surface moisture is related to June–September (JJAS) precipitation and that the increase in lake-water TOC concentration reflects an increase in total annual precipitation. A significant depletion in 13C of sediment organic matter in the early 1980s probably reflects the effect of a single or a few consecutive years with anomalously high summer precipitation, resulting in elevated DIC content of the lake water, predominantly originating from increased export and subsequent respiration of organic carbon from the mire. Based on these results, it was not possible to link proxy data obtained on peat and lake-sediment records directly to permafrost decay. Instead our data indicate that increased precipitation and anomalously high rainfall during summers had a significant impact on the mire and the adjacent lake ecosystem. We therefore propose that effects of increased precipitation should be considered when evaluating potential forcing mechanisms of recent changes in carbon cycling in the subarctic.
|
|
