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| 4. |
- Berggren, Lars, et al.
(author)
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Förord
- 2010
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In: Samhällshistoria i fokus. En festskrift till Lars Olsson om arbete, migration och kultur. - 9789197898003 ; , s. 11-15
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Book chapter (other academic/artistic)
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| 14. |
- Svensson, Lars, 1963-, et al.
(author)
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From Tutor to Producer : Changes in the design space of online education
- 2010
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In: Proceedings of the 33rd IRIS Seminar. 2010.. - Rebild, Denmark.
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Conference paper (peer-reviewed)abstract
- In recent years online and blended learning has scaled up from being a pilot endeavour driven by pioneers, to constituting a large portion of many institutions of higher education. In the process, the conditions for the online teacher has gradually changed, and the situation of today is in many ways problematic where student interaction and dialogue has to stand back in favour of time consuming content production, material delivery, and technical problem solving. This paper draws on the experiences from a Scandinavian University to illustrate how this transition can be understood in the light of rapid technological development in combination with slow evolution of pedagogical models for online education.
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| 19. |
- Bhatt, Deepak L., et al.
(author)
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Rationale, design and baseline characteristics of the effect of ticagrelor on health outcomes in diabetes mellitus patients Intervention study
- 2019
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In: Clinical Cardiology. - : Wiley. - 0160-9289 .- 1932-8737. ; 42:5, s. 498-505
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Journal article (peer-reviewed)abstract
- In the setting of prior myocardial infarction, the oral antiplatelet ticagrelor added to aspirin reduced the risk of recurrent ischemic events, especially, in those with diabetes mellitus. Patients with stable coronary disease and diabetes are also at elevated risk and might benefit from dual antiplatelet therapy. The Effect of Ticagrelor on Health Outcomes in diabEtes Mellitus patients Intervention Study (THEMIS, NCT01991795) is a Phase 3b randomized, double-blinded, placebo-controlled trial of ticagrelor vs placebo, on top of low dose aspirin. Patients >= 50 years with type 2 diabetes receiving anti-diabetic medications for at least 6 months with stable coronary artery disease as determined by a history of previous percutaneous coronary intervention, bypass grafting, or angiographic stenosis of >= 50% of at least one coronary artery were enrolled. Patients with known prior myocardial infarction (MI) or stroke were excluded. The primary efficacy endpoint is a composite of cardiovascular death, myocardial infarction, or stroke. The primary safety endpoint is Thrombolysis in Myocardial Infarction major bleeding. A total of 19 220 patients worldwide have been randomized and at least 1385 adjudicated primary efficacy endpoint events are expected to be available for analysis, with an expected average follow-up of 40 months (maximum 58 months). Most of the exposure is on a 60 mg twice daily dose, as the dose was lowered from 90 mg twice daily partway into the study. The results may revise the boundaries of efficacy for dual antiplatelet therapy and whether it has a role outside acute coronary syndromes, prior myocardial infarction, or percutaneous coronary intervention.
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| 20. |
- Carlsson, M. S., et al.
(author)
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Effects of mussel farms on the benthic nitrogen cycle on the Swedish west coast
- 2012
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In: Aquaculture Environment Interactions. - : Inter-Research Science Center. - 1869-215X .- 1869-7534. ; 2:2, s. 177-191
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Journal article (peer-reviewed)abstract
- The biogeochemical impact of 3 long-line mussel farms (M1, M2 and M3) in Lysekil, Sweden, was investigated from before farm establishment until 1.5 yr after operation had begun. Sedimentation, benthic N flux, total oxygen uptake (TOU) and sulfate reduction rate (SRR) were all significantly increased below the mussel lines at all 3 farms. Effects of increased sedimentation rates were revealed by sediment profile imaging and were highest at Stn M2. These effects increased significantly with time of farm operation, indicating the accumulation of organic matter within sediments over time. Furthermore, more total particulate organic N deposited at farm stations was recycled into the water column compared to at reference stations (similar to 45 versus similar to 13%), indicating an increased release of dissolved inorganic N from sediment below the mussel farms. At one station (M2) with the highest increase in sedimentation rate, denitrification seemed inhibited, while at another station (M3), with a less pronounced increase in sedimentation rate, denitrification was in fact stimulated, accounting for 13% of total sediment N removal. Calculations based on estimated values of N removal through mussel harvest and direct measurements of N input through changes in sedimentation, N regeneration from sediment to the water column through benthic fluxes and changes in denitrification showed, in all cases, a net removal of N from the system, as only 26 to 40% of the total amount of harvested N had been added to the sediments during the growth period.
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| 21. |
- Edlund, Lars-Erik, et al.
(author)
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Mjölke - Rallarros : Epilobium angustifolium
- 2005
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In: Människan och floran. - : Centrum för biologisk mångfald, Uppsala. - 9146177892 ; , s. 193-194
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Book chapter (other academic/artistic)
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| 22. |
- Enocsson, Helena, et al.
(author)
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Comparison of Surrogate Markers of the Type I Interferon Response and Their Ability to Mirror Disease Activity in Systemic Lupus Erythematosus
- 2021
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In: Frontiers in Immunology. - : Frontiers Media S.A.. - 1664-3224. ; 12
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Journal article (peer-reviewed)abstract
- Objectives: Type I interferons (IFNs) are central and reflective of disease activity in systemic lupus erythematosus (SLE). However, IFN-alpha levels are notoriously difficult to measure and the type I IFN gene signature (IGS) is not yet available in clinical routine. This study evaluates galectin-9 and an array of chemokines/cytokines in their potential as surrogate markers of type I IFN and/or SLE disease activity.Methods: Healthy controls and well-characterized Swedish SLE patients from two cross-sectional cohorts (n=181; n=59) were included, and a subgroup (n=21) was longitudinally followed. Chemokine/cytokine responses in immune complex triggered IFN-alpha activity was studied in healthy donor peripheral blood mononuclear cells (PBMC). Levels of chemokines/cytokines and galectin-9 were measured by immunoassays. Gene expression was quantified by qPCR.Results: The IGS was significantly (p<0.01) correlated with galectin-9 (rho=0.54) and CXCL10 (rho=0.37) levels whereas serum IFN-alpha correlated with galectin-9 (rho=0.36), CXCL10 (rho=0.39), CCL19 (rho=0.26) and CCL2 (rho=0.19). The strongest correlation was observed between galectin-9 and TNF (rho=0.56). IFN-alpha and disease activity (SLEDAI-2K) were correlated (rho=0.20) at cross-sectional analysis, but no significant associations were found between SLEDAI-2K and galectin-9 or chemokines. Several inflammatory mediators increased at disease exacerbation although CCL19, CXCL11, CXCL10, IL-10 and IL-1 receptor antagonist were most pronounced. Immune complex-stimulation of PBMC increased the production of CCL2, CXCL8 and TNF.Conclusion: Galectin-9 and CXCL10 were associated with type I IFN in SLE but correlated stronger with TNF. None of the investigated biomarkers showed a convincing association with disease activity, although CXCL10 and CCL19 performed best in this regard.
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| 23. |
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| 25. |
- Ivarsson, Sten-A., et al.
(author)
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Glutamate decarboxylase antibodies in non-diabetic pregnancy precedes insulin-dependent diabetes in the mother but not necessarily in the offspring
- 1997
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In: Autoimmunity. - 0891-6934. ; 26:4, s. 261-269
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Journal article (peer-reviewed)abstract
- We studied the risk for diabetes of glutamate decarboxylase (GAD65Ab) and islet cell (ICA) autoantibodies in non-diabetic pregnant mothers and their children. Pregnancy and cord blood sera were collected in 1970-87 from about 35,000 mothers who delivered a child in the city of Malmo, Sweden. A total of 42 mothers were identified in 1988 who, 1-18 years after their pregnancies, had developed either insulin-dependent (n = 22) or non-insulin dependent (n = 20) diabetes mellitus. First, in 123 pregnant mothers selected as controls, 0.8% had GAD65Ab and 0.8% ICA. Second, among the mothers with non-insulin dependent diabetes, 7/20 (35%) had GAD65Ab eight months to 13 years, 10 months before clinical diagnosis. Third, in mothers who later developed insulin-dependent diabetes, 12/22 (55%) had GAD65Ab and 10/22 (45%) had ICA in pregnancies preceding the clinical diagnosis by 13 months to 9 years, 4 months. In 1996, none of the children born to the 42 mothers have developed diabetes. GAD65Ab and ICA in non-diabetic pregnancies may predict insulin-dependent diabetes in the mother but not necessarily in the offspring.
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| 26. |
- Johansson, Jonas, et al.
(author)
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Time-Resolved Studies of Light Propagation in Crassula and Phaseolus Leaves
- 1999
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In: Photochemistry and Photobiology. - 0031-8655. ; 69:2, s. 242-247
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Journal article (peer-reviewed)abstract
- Time-resolved transmittance was used to extract in vivo optical properties of leaves of green plants experimentally. In time-resolved transmittance measurements an ultrashort light pulse is directed onto the surface of the object and the transmitted light is measured with a time resolution in the range of picoseconds. A table-top terawatt laser was used to generate 200 fs light pulses at 790 nm with a repetition rate of 10 Hz. The light pulses were focused through a cuvette filled with water to produce white light pulses and optical filters were placed in the beam path to select the wavelength of the light focused onto the leaf surface. The time profiles of the light transmitted through the leaves was recorded with a streak camera having a time resolution of about 2.5 ps. Results from Crassula falcata and Phaseolus vulgaris studied at 550, 670 and 740 nm are reported. The three selected wavelength regions represent medium, high and a low absorption of light, respectively. A library of curves was generated using Monte Carlo simulation, and the absorption and scattering coefficients were extracted by comparison of experimental curves with this library. Our results suggest that in the case of the thin (200 μm) Phaseolus leaves and certainly in the case of the thick (4 mm) Crassula leaves, light scattering plays an important role in light transport through the leaf and should also affect light flux in these leaves.
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| 27. |
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| 28. |
- Mehta, Bharat, 1993, et al.
(author)
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Laser powder bed fusion of an al-mg-sc-zr alloy: Manufacturing, peak hardening response and thermal stability at peak hardness
- 2022
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In: Metals. - : MDPI AG. - 2075-4701. ; 12:1
-
Journal article (peer-reviewed)abstract
- This study shows a rapid and systematic approach towards identifying full density and peak hardness for an Al-Mg-Sc-Zr alloy commonly known as Scalmalloy®. The alloy is tailored for the laser powder bed fusion process and has been shown to be printable with >99.8% relative density. The microstructure suggests Al grain refinement in melt pool boundaries, associated with formation of primary Al3 (Sc, Zr) particles during solidification. Peak hardening response was identified by heat treatment tests at 573,598 and 623 K between 0 and 10 h. A peak hardness of 172 HV0.3 at 598 K for 4 h was identified. The mechanical properties were also tested with yield and ultimate strengths of 287 MPa and 364 MPa in as-printed and 468 MPa and 517 MPa in peak hardened conditions, respectively, which is consistent with the literature. Such an approach is considered apt when qualifying new materials in industrial laser powder bed fusion systems. The second part of the study discusses the thermal stability of such alloys post-peak-hardening. One set of samples was peak hardened at the conditions identified before and underwent secondary ageing at three different temperatures of 423,473 and 523 K between 0 and 120 h to understand thermal stability and benchmark against conventional Al alloys. The secondary heat treatments performed at lower temperatures revealed lower deterioration of hardness over ageing times as compared to the datasheets for conventional Al alloys and Scalmalloy®, thus suggesting that longer ageing times are needed.
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| 29. |
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| 30. |
- Persson, Emilia, et al.
(author)
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MRI-only radiotherapy from an economic perspective : Can new techniques in prostate cancer treatment be cost saving?
- 2023
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In: Clinical and Translational Radiation Oncology. - : Elsevier BV. - 2405-6308. ; 38, s. 183-187
-
Journal article (peer-reviewed)abstract
- BACKGROUND AND PURPOSE: The aim of this study was to analyze a magnetic resonance imaging (MRI)-only radiotherapy workflow from an economic perspective in terms of reduced time, costs and systematic uncertainties.MATERIAL/METHODS: A documented Swedish clinical implementation of MRI-only radiotherapy was used as template for cost assessments compared to a combined computed tomography (CT)/MRI workflow. The costs were taken from official regional price lists from 2021. MRI-only specific quality assurance (QA) was assumed necessary in an initial phase. Treatment plans for target volumes with margins of 5-10 mm were created for ten prostate cancer patients prescribed 78 Gy in 39 fractions. The risk of Grade ≥ 2 rectal toxicity or rectal bleeding was calculated using the QUANTEC recommended NTCP model and costs estimated based on subsequent diagnostic examinations.RESULTS: The exclusion of the CT-examination and faster target delineation were the main contributors to cost reductions. Additional QA procedures limited the initial cost reduction to 14 EUR/patient. Long-term MRI-only reduced the costs by 209 EUR/patient. Reducing margins resulted in Grade ≥ 2 rectal toxicity or rectal bleeding probability of 9.7 % for 7 mm margin and 6.0 % for 5 mm margin. This margin reduction resulted in an additional cost reduction of 46 EUR/patient.CONCLUSION: An MRI-only workflow implementation is associated with reduced costs when the workflow tasks are more time efficient and side effects are reduced as a result of margin reduction. The short-term economic benefits are limited due to extra costs of QA procedures. The economic benefits of MRI-only will make impact first when the workflow is well established, and margin reduction has been included.
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| 31. |
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| 32. |
- Sköldberg, Håkan, et al.
(author)
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BIO-CCS I FJÄRRVÄRMESEKTORN – SYNTES
- 2022
-
Reports (other academic/artistic)abstract
- Den svenska fjärrvärmesektorn har stor potential att bidra med negativa koldioxidutsläpp genom bio-CCS, minst 10 Mton per år. Den största osäkerheten beträffande möjligheterna för bio-CCS gäller marknads förutsättningarna. Uppvärmningsbranschen har en vision om att år 2045 utgöra en kolsänka. Ett sätt att åstadkomma detta är genom att avskilja och lagra koldioxidutsläpp med biogent ursprung. Ett antal fjärrvärmeföretag har redan olika långt gångna planer på att satsa på bio-CCS. De har sett ett värde i att samarbeta kring hur detta kan åstadkommas. Ett led i detta är projektet Bio-CCS i fjärrvärmesektorn som består av ett gediget underlag baserat på forskning kring olika aspekter av frågan samt en strategi baserad på det underlaget. I denna rapport redovisas en syntes av detta forskningsarbete. Projektet visar att fjärrvärmesektorn har stor teoretisk potential att bidra med negativa koldioxidutsläpp, minst 10 Mton per år. I huvudsak är avskiljning, transport och lagring av koldioxid beprövad teknik även om tillämpningen i detta fall är ny. Även om bio-CCS är förknippad med energianvändning så bidrar tekniken sett ur ett systemperspektiv med stor nytta för att minska koldioxid[1]utsläppen. Bio-CCS är en relativt dyr teknik och det är angeläget att utnyttja samverkan och kluster för att exempelvis skapa ökad kostnadseffektivitet i transport och mellanlagring. Tillgång till lagringsplatser är en förutsättning för framgång och flera alternativ bedöms bli tillgängliga. Det kan dock uppstå konkurrens om tillgången till lagringsplatserna. De regelmässiga förutsättningarna för bio-CCS i Sverige har förbättrats avsevärt de senaste dryga decenniet. Flera regelmässiga hinder kvarstår dock. En del utgör mindre barriärer, andra är av mer betydande karaktär. Den största osäkerheten beträffande möjligheterna för bio-CCS gäller ekonomin. Flera potentiella finansieringsmetoder har studerats, både stöd, regleringar och frivilligmarknader. Det finns fortfarande oklarheter kring syftet med planerade stöd och det framtida ägandet av de negativa utsläppen. Det genomförda projektet har skapat ett forum för kunskapsuppbyggnad, erfarenhetsutbyte och nätverkande, vilket de deltagande företagen bedömt vara mycket värdefullt.
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| 33. |
- Somesfalean, Gabriel, et al.
(author)
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Violet diode laser in time-resolved stored-ion spectroscopy
- 2004
-
In: Physica Scripta. - 0031-8949 .- 1402-4896. ; 69:2, s. 98-103
-
Journal article (peer-reviewed)abstract
- Lifetime measurements of the metastable 3d D-2(3/2) level in singly charged calcium were performed using the newly developed violet diode laser operated in an external cavity arrangement. The laser was employed on stored ions at the CRYRING facility to optically pump the resonance line at 397 nm. In combination with laser probing at 866 nm this detection scheme gave the possibility to record the lifetime of this level. which has a radiative lifetime of about 1 s.
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| 34. |
- Svanberg, Christina, et al.
(author)
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Cephalometric analysis of adults with Turner syndrome
- 2016
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In: Swedish Dental Journal. - : SWEDISH DENTAL JOURNAL. - 0347-9994. ; 40:1, s. 33-41
-
Journal article (peer-reviewed)abstract
- Turner syndrome (TS) is a genetic disorder of females with a prevalence of 1/2000-3000 live female births. The aim of this study was to compare cephalometric variables from adult women diagnosed with TS to a standardized reference group of 31-year old healthy women, and to evaluate the possible effects of human growth hormone (hGH) therapy in women with TS. Registered TS subjects in the Southeast region of Sweden were invited to take part in the study. Twenty-one women aged 36 +/- 13(18-57) years accepted participation. Lateral radiographs of the head were analyzed using standard cephalometric methods (Hasund analysis) and with the commercially available soft-ware program FACAD. Comparisons were made with roentgen-cephalometric standards from a reference group of nineteen 31-year old Swedish women. Analysis of the cephalometric radiographs from the TS subjects showed a more retrognathic maxilla (SNA 80.3 +/- 5.4) (p=0.0460) and mandible (SNB 77.0 +/- 5.2) (p=0.0014), and a correspondingly backward position of the chin (SN/Pg 78.9 +/- 5.5) (p=0.0046) as compared to the reference values of 31-year old women (SNA 83.2 +/- 3.0, SNB 81.5 +/- 2.3 and SNPg 83.0 +/- 2.3, respectively). In addition there was an increased posterior inclination of the maxilla (SN/NL 8.6 +/- 4.1), as compared to the reference values (SN/NL 5,3 +/- 2.7) (p=0.0048). There were no significant differences regarding sagittal or vertical jaw relations, mandibular inclination or cranial base angle between the TS-group and the 31-year olds with the reference values. No significant difference was seen in jaw relationship, as measured by the ANB value, however the Wits(index) (3.3 +/- 3.5) was higher (p=0.0001) than the reference values (-0.1 +/- 1.8). Subjects with or without previous hGH administration did not show any significant differences in cephalometric values. In conclusion, women with TS had a significantly more retrognathic maxilla (SNA) and mandible (SNB) and a correspondingly significantly posterior position of the chin (SN/Pg), a significantly increased posterior inclination of the maxilla (SN/NL) and a significantly increased Witsindex as compared to the reference group of 31-year old women. No craniofacial variables differed significantly between previously hGH-treated and not hGH-treated women with TS.
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| 35. |
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| 36. |
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| 37. |
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| 38. |
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| 39. |
- Svanberg, Fredrik, et al.
(author)
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Lead isotopes and lead shot ingestion in the globally threatened marbled teal (Marmaronetta angustirostris) and white-headed duck (Oxyura leucocephala)
- 2006
-
In: Science of the Total Environment. - : Elsevier BV. - 0048-9697 .- 1879-1026. ; 370:2-3, s. 416-424
-
Journal article (peer-reviewed)abstract
- Lead isotope ratios ((206)Pb/(207)Pb and (208)Pb/(207)Pb) and concentrations in the livers and bones of marbled teal and white-headed duck found dead or moribund were determined in order to establish the main lead source in these waterfowl species. Lead concentrations in bone (dry weight) and liver (wet weight) were found to be very high in many of the white-headed ducks (bone: geometric mean=88.9 ppm, maximum=419 ppm; liver: geometric mean=16.8 ppm, maximum=57.0 ppm). Some of the marbled teal had high lead levels in the bones but liver lead levels were all low (bone: geometric mean=6.13 ppm, maximum=112 ppm; liver: geometric mean=0.581 ppm, maximum=4.77 ppm). Ingested lead shot were found in 71% of the white-headed duck and 20% of the marbled teal. The (206)Pb/(207)Pb ratio in livers and bones of white-headed ducks and marbled teals showed no significant differences compared to the ratios obtained from lead shot. The (206)Pb/(207)Pb ratio in bones of marbled teal ducklings with the highest lead concentrations tended to resemble the ratios of lead shot, which supports our hypothesis that the lead was derived from the hens. We also found that the lead ratios of lead shot and lead ratios described for soils in the area overlapped, but also that the isotopic ratio (206)Pb/(207)Pb in lead shot used in Spain has a narrow range compared with those used in North America. The principal source of lead in many of these birds was, however, most likely lead shot, as supported by the similar isotopic ratios, high lead concentrations in tissues and evidence of ingested shot.
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| 40. |
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| 41. |
- Svanberg, Johan, 1978-
(author)
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Arbetets relationer och etniska dimensioner : Verkstadsföreningen, Metall och esterna vid Svenska Stålpressnings AB i Olofström 1945-1952
- 2010
-
Doctoral thesis (other academic/artistic)abstract
- Labour migration to Sweden is analysed from a labour perspective. As regards theory, the thesis focuses on how class and ethnicity intersect in a capitalistic setting, but it also gives attention to gender and age as structural principles. The main purpose is to analyse migrants in Sweden as a party in the relationship between labour and capital, and to explore how the immigration and the active recruitment of workers in other countries affected and was affected by the relative strengths of the parties on the labour market, covering the period 1945–1952.The relationship between labour and capital, regarding migration-related issues, is analysed from above and below on both national and local level, and the thesis discerns how the state mediated between the parties. It examines the first encounters between foreign-born and native-born workers at shop-floor level, how these encounters affected the relationship between the trade union and the industrial management concerned, and explores how all this, in turn, affected the relationship between the national parties on the Swedish labour market. A structural perspective is combined with micro analyses of narratives from the actors involved, which opens up for a study of the history of society.Firstly, the thesis addresses the relationship between the Swedish Engineering Employers’ Association and the Swedish Metalworkers’ Union, and secondly it is a local workplace study, focusing on Svenska Stålpressnings AB in Olofström (the Swedish Steel Pressing Company). The more precise focus of attention is on war refugees from Estonia employed by the company in Olofström between 1945 and 1947, and on Estonians recruited directly from West German refugee camps in the early 1950s.The study reveals that the Metalworkers’ Union at first opposed labour recruitment abroad – at both national and local level –, but also how coincident interests developed between labour, capital and the state regarding labour immigration. An important finding is that the Metalworkers’ Union had great influence considering which companies would be allowed to recruit foreign-born workers, and that the trade union could direct the migrations to workplaces with acceptable staff policies.A fundamental research problem for the thesis is, furthermore, how social groups construct ethnic boundaries between “us” and “the others”. It is stressed that Estonians’ background experiences and social memories differed from those of the Swedish workers, and that these differences affected the outcomes of the first encounters. But it is also pointed out that the Estonian group was internally divided, with a basis in interwar Estonian political history and in disparate class backgrounds among the Estonians.
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| 42. |
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| 43. |
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| 44. |
- Svensson, Ann, 1962-, et al.
(author)
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Assessing the business value of electronic order-to-payment cycle
- 2009
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In: ECIS 2009 Proceedings.
-
Conference paper (peer-reviewed)abstract
- In this paper, we build an evaluation tool for assessing the business impacts of an electronic order-topayment cycle. Based on a literature review and expert interviews, we formulate a three-stage model which includes performance indicators for electronic order, electronic invoice, and electronic payment processes. In addition, we pinpoint the inter-process linkages. We test the proposed evaluation tool in a business context and find that the impacts of automating the order-to-payment cycle relate closely to cost avoidance. However, a strong emphasis on asset utilization can be observed as well – better use of IT could enhance utilization of existing human resources and capital, affecting company profitability.
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| 45. |
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| 46. |
- Svensson, Ann, 1962-, et al.
(author)
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Attitudes to information technology in health care professions
- 2009
-
In: The 17th European Conference on Information Systems, Verona, june 8-10, 2009..
-
Conference paper (other academic/artistic)abstract
- The purpose of this paper is to explore attitudes towards IT among various categories of health care staff; health care professions. We will identify problem areas that may be the reasons for why different attitudes among different professions at a healthcare organisation exist, and subsequently we will analyse how this may have impact on how to make sense of IT use. The research question is: What factors may explain differences regarding attitudes to IT among different professions in a health care organisation?The paper reports from a particular study of the “NU” healthcare organisation in west Sweden. The results reveal two main problem areas: i) the infrastructural and; ii) the socio-organisational. These are discussed as analytical implications for bridging the gaps between different professions in health care organisations.
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| 47. |
- Svensson, Lars, 1963-, et al.
(author)
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Learning Models in Online Education : On the Transformation from Tutors to Producers
- 2010
-
In: Proceedings of Global Learn Asia Pacific 2010. - : AACE. - 1880094797 ; , s. 3707-3712
-
Conference paper (other academic/artistic)abstract
- In recent years online and blended learning has scaled up from being a pilot endeavor driven by pioneers, to constituting a large portion of many institutions of higher education. In the process, the conditions for the online teacher has gradually changed, and the situation of today is in many ways problematic where student interaction and dialogue has to stand back in favor of time consuming content production, material delivery, and technical problem solving. This paper draws on the experiences from a Scandinavian University to illustrate how this transition can be understood in the light of rapid technological development in combination with slow evolution of pedagogical models for online education.
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| 48. |
- Svensson, Tomas, et al.
(author)
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VCSEL-based oxygen spectroscopy for structural analysis of pharmaceutical solids
- 2008
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In: Applied Physics B. - : Springer Science and Business Media LLC. - 0946-2171 .- 1432-0649. ; 90:2, s. 345-354
-
Journal article (peer-reviewed)abstract
- We present a minimalistic and °exible single-beam instrumen- tation based for sensitive tunable diode laser absorption spectroscopy (TD- LAS) and its use in structural analysis of highly scattering pharmaceu- tical solids. By utilising a vertical-cavity surface emitting laser (VCSEL) for sensing of molecular oxygen dispersed in tablets, we address structural properties such as porosity. Experiments involve working with unknown pathlengths, severe backscattering and di®use light. These unusual experi- mental conditions has lead to the use of the term gas in scattering media absorption spectroscopy (GASMAS). By employing fully digital wavelength modulation spectroscopy and coherent sampling, system sensitivity in am- bient air experiments reaches the 10¡7 range. Oxygen absorption exhibited by our tablets, being in°uenced by both sample porosity and scattering, were in the range 8 £ 10¡5 to 2 £ 10¡3, and corresponds to 2-50 mm of pathlength through ambient air (Leq). The day-to-day reproducibility was on average 1.8% (0.3 mm Leq), being limited by mechanical positioning. This is the ¯rst time sub-millimetre sensitivity is reached in GASMAS. We also demonstrate measurements on gas transport on a 1 s timescale. By employing pulsed illumination and time-correlated single photon counting, we reveal that GASMAS exhibits excellent correlation with time-domain photon migration. In addition, we introduce an optical measure of porosity by relating oxygen absorption to average photon time-of-°ight. Finally, the simplicity, robustness and low cost of this novel TDLAS instrumentation provides industrial potential.
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| 49. |
- Taggart, Mark A., et al.
(author)
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Metal levels in the bones and livers of globally threatened marbled teal and white-headed duck from El Hondo, Spain
- 2009
-
In: Ecotoxicology and Environmental Safety. - Amsterdam : Elsevier BV. - 0147-6513 .- 1090-2414. ; 72:1, s. 1-9
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Journal article (peer-reviewed)abstract
- El Hondo is a key area for marbled teal and white-headed duck. We present Pb, Cu, Zn, Se, and As data for bone and liver in birds found dead between 1996 and 2001. Several metals were higher in adult white-headed ducks than in marbled teal. They were higher in female than in male white-headed ducks, and did not differ with sex in marbled teal, but did by age. Lead in liver of adults was influenced by Pb shot ingestion, which was detected in 21% of marbled teal and in 71% of white-headed duck. No marbled teal had liver levels indicative of Pb poisoning, while 86% of white-headed ducks did. Selenium, Zn, and Cu were elevated in 13%, 7%, and 39% of birds, respectively. Whilst Pb shot poses the greatest threat to these species, further work should assess exposure via plants, invertebrates, water, and sediments for other metals, and investigate possible sub-lethal effects.
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- Werner, Helene, 1987, et al.
(author)
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Psychological Interventions for Poor Oral Health: A Systematic Review
- 2016
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In: Journal of Dental Research. - : SAGE Publications. - 0022-0345 .- 1544-0591. ; 95:5, s. 506-514
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Journal article (peer-reviewed)abstract
- The aim of this systematic review and meta-analysis was to study the effectiveness of psychological interventions in adults and adolescents with poor oral health. The review follows the PRISMA guidelines for systematic reviews. The PICO format (population, intervention, comparison, and outcome) was used to define eligible studies. The populations were adults or adolescents (13 y of age and independent of others) with poor oral health (defined as dental caries, periodontal disease, and/or peri-implantitis). The interventions were psychological and/or behavioral models and theories, in comparison with traditional oral health education/information. The primary outcomes were dental caries, periodontitis, gingivitis, and peri-implantitis. Secondary outcomes were dental plaque, oral health-related behavior, health-related quality of life, health beliefs and attitudes, self-perceived oral health, and complications/risks. The systematic literature search identified 846 articles in December 2013 and 378 articles in July 2015. In total, 11 articles on 9 randomized controlled trials were found to meet the inclusion criteria. These reported on adults with periodontal disease, and several used motivational interviewing (MI) as their mode of intervention. The CONSORT guidelines and the GRADE approach were used for study appraisal and rating of evidence. The meta-analysis showed no statistically significant differences in gingivitis or plaque presence. In addition, a meta-analysis on MI compared with education/information found no statistically significant differences in gingivitis presence. Only 1 meta-analysison psychological interventions versus education/information regarding the plaque indexshowed a small but statistically significant difference. There were also statistically significant differences reported in favor of psychological interventions in oral health behavior and self-efficacy in toothbrushing. However, the clinical relevance of these differences is difficult to estimate. The certainty of evidence was low. Future research needs to address several methodological issues and not only study adults with periodontal disease but also adolescents and patients with dental caries and peri-implantitis.
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