| 1. |
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| 2. |
- Adloff, C, et al.
(författare)
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A measurement of the t dependence of the helicity structure of diffractive rho meson electroproduction at HERA
- 2002
-
Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 539:1-2, s. 25-39
-
Tidskriftsartikel (refereegranskat)abstract
- The helicity structure of the diffractive electroproduction of rho mesons, e + p --> e + rho + Y, is studied in a previously unexplored region of large four-momentum transfer squared at the proton vertex, t: 0 < t' < 3 GeV2, where t' = - min. The data used are collected with the HI detector at HERA in the kinematic domain 2.5 < Q(2) < 60 GeV2, 40 < W < 120 GeV No t dependence of the r(00)(04) spin density matrix element is found. A significant t dependent helicity non-conservation from the virtual photon to the rho meson is observed for the spin density matrix element combinations r(00)(5) + 2r(11)(5) and r(00)(1) + 2r(11)(1). These t dependences are consistently described by a perturbative QCD model based on the exchange of two gluons.
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| 3. |
- Adloff, C, et al.
(författare)
-
Diffractive photoproduction of psi(2S) mesons at HERA
- 2002
-
Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 541:3-4, s. 251-264
-
Tidskriftsartikel (refereegranskat)abstract
- Results on diffractive photoproduction of psi(2S) mesons are presented using data collected between 1996 and 2000 with the H1 detector at the HERA ep collider. The data correspond to an integrated luminosity of 77 pb(-1). The energy dependence of the diffractive psi(2S) cross section is found to be similar to or possibly somewhat steeper than that for J/psi mesons. The dependences of the elastic and proton dissociative psi(2S) photoproduction cross sections on the squared momentum transfer t at the proton vertex are measured. The t-dependence of the elastic channel, parametrised as e(bt), yields b(el)(psi(2S)) = (4.31 +/- 0.57 +/- 0.46) GeV-2, compatible with that of the J/psi. For the proton dissociative channel the result b(pd)(psi(2S)) = (0.59 +/- 0.13 +/- 0.12) GeV-2 is 2.3 standard deviations smaller than that measured for the J/psi. With proper account of the individual wavefunctions theoretical predictions based on perturbative QCD are found to describe the measurements well. (C) 2002 Elsevier Science B.V. All rights reserved.
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| 4. |
- Adloff, C, et al.
(författare)
-
Energy flow and rapidity gaps between jets in photoproduction at HERA
- 2002
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Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 24:4, s. 517-527
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Tidskriftsartikel (refereegranskat)abstract
- Dijet events in photon-proton collisions in which there is a large pseudorapidity separation, Deltaeta > 2.5 between the two highest E-T jets are studied with the H1 detector at HERA. The inclusive dijet cross sections are measured as functions of the longitudinal momentum fractions of the proton and photon which participate in the production of the jets, x(p)(jets) and x(gamma)(jets) respectively, Deltaeta, the pseudorapidity P separation between the two highest E-T jets, and E-T(gap), the total summed transverse energy between the jets. Rapidity gap events are defined as events in which E-T(gap) is less than E-T(cut), for E-T(cut) varied between jets 0.5 and 2.0 GeV. The fraction of dijet events with a rapidity gap is measured differentially in Deltaeta, x(p)(jets) and x(gamma)(jets). An excess of events with rapidity gaps at low values of E-T(cut) is observed above the expectation from standard photoproduction processes. This excess can be explained by the exchange of a strongly interacting colour singlet object between the jets.
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| 5. |
- Adloff, C, et al.
(författare)
-
Inelastic leptoproduction of J/psi mesons at HERA
- 2002
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Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 25:1, s. 41-53
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Tidskriftsartikel (refereegranskat)abstract
- The leptoproduction of J/psi mesons is studied in inelastic reactions for four momentorri transfers 2 < Q(2) < 100GeV(2). The data were taken with the H1 detector at the electron proton collider HERA and correspond to an integrated luminosity of 77 pb(-1). Single differential and double differential cross sections are measured with increased precision compared with previous analyses. New leading order calculations within the non-relativistic QCD factorisation approach including colour octet and colour singlet contributions are compared with the data and are found to give a reasonable description of most distributions. An exception is the shape of the distribution in the J/psi fractional energy. z, which deviates significantly from that of the data. Comparisons with photoproduction are made and the polarisation of the produced J/psi meson is analysed.
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| 6. |
- Adloff, C, et al.
(författare)
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Inelastic photoproduction of J/psi mesons at HERA
- 2002
-
Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 25:1, s. 25-39
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Tidskriftsartikel (refereegranskat)abstract
- An analysis of inelastic photoproduction of J/psi mesons is presented using data collected at the ep collider HERA corresponding to an integrated luminosity of above 80 pb(-1), Differential and double I < P-t/psi(2) < differential cross sections are measured in a wide kinematic region: 60 < W-gammap < 260 GeV, 1 p(t,psi)(2) < 60 GeV2 and 0.05 < z < 0.9. where z is the fraction of the energy of the exchanged photon transferred to the J/psi meson in the rest frame of the target proton. Cross sections at z less than or similar to 0.3 are presented for the first time. Theoretical calculations within the Colour Singlet Model at NLO for direct photon processes are shown to give a good description of the data in the medium z region (0.3 < z < 0.9) up to the highest p(t,psi)(2) values. A calculation using a k(t) factorisation approach in LO in the Colour Singlet Model is also able to describe these data. The data in the full z range are also compared to LO calculations within a non-relativistic QCD framework including colour octet and colour singlet contributions for direct and resolved photons. It seems possible to reconcile data and theory with modest contributions from colour octet processes. The polarisation of the J/psi meson is measured as a function of z and p(t,psi) and is reasonably described by the theoretical predictions.
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| 7. |
- Adloff, C, et al.
(författare)
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Measurement of D*(+/-) meson production and F-2(c) in deep-inelastic scattering at HERA
- 2002
-
Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 528:3-4, s. 199-214
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Tidskriftsartikel (refereegranskat)abstract
- The inclusive production of D*+/-(2010) mesons in deep-inelastic scattering is studied with the HI detector at HERA. In the kinematic region 1 < Q(2) < 100 GeV2 and 0.05 < y < 0.7 an e(+) p cross section for inclusive D*+/- meson production of 8.50 +/- 0.42(stat.)(-100)(+1.21)(syst.) nb is measured in the visible range p(tD*) > 1.5 GeV and eta(D*) < 1.5. Single and double differential inclusive D*+/- meson cross sections are compared to perturbative QCD calculations in two different evolution schemes, The charm contribution to the proton structure, F-c(2)(x, Q(2)), is determined by extrapolating the visible charm cross section to the full phase space. This contribution is found to rise from about 10% at Q(2) = 1.5 GeV2 to more than 25% at Q(2) = 60 GeV2 corresponding to x values ranging from 5 x 10(-5) to 3 x 10(-3). (C) 2002 Elsevier Science B.V. All rights reserved.
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| 8. |
- Adloff, C, et al.
(författare)
-
Measurement of dijet cross sections in photoproduction at HERA
- 2002
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Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 25:1, s. 13-23
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Tidskriftsartikel (refereegranskat)abstract
- Dijet cross sections as functions of several jet observables are measured in photoproduction using the HI detector at HERA. The data sample comprises e(+)p data with an integrated luminosity of 319 pb(-1). Jets are selected using the inclusive k(perpendicular to) algorithm with a minimum transverse energy of 25 GeV for the leading jet. The phase space covers longitudinal proton momentum fraction x(p) and photon longitudinal momentum fraction x(gamma) in the ranges 0.05 < x(p) < 0.6 and 0.1 < x(gamma) < 1. The predict ions of next-to-leading order perturbative QCD, including recent photon and proton parton densities, are found to be compatible with the data in a wide kinematical range.
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| 9. |
- Adloff, C, et al.
(författare)
-
Measurement of dijet electroproduction at small jet separation
- 2002
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Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 24:1, s. 33-41
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Tidskriftsartikel (refereegranskat)abstract
- Deep-inelastic scattering data in the range 150 < Q(2) < 35000 GeV2 are used to investigate the minimum jet separation necessary to allow accurate description of the rate of dijet production using next-to-leading order perturbative QCD calculations. The required jet separation is found to be small, allowing about 1/3 of DIS data to be classified as dijet, as opposed to approximately 1/10 with more typical jet analyses. A number of precision measurements made using this dijet sample are well described by the calculations. The data are also described by the combination of leading order matrix elements and parton showers, as implemented in the QCD based Monte Carlo model RAPGAP.
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| 10. |
- Adloff, C, et al.
(författare)
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Measurement of inclusive jet cross-sections in deep-inelastic ep scattering at HERA
- 2002
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Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 542:3-4, s. 193-206
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Tidskriftsartikel (refereegranskat)abstract
- A measurement of inclusive jet cross-sections in deep-inelastic ep scattering at HERA is presented based on data with an integrated luminosity of 21.1 pb(-1). The measurement is performed for photon virtualities Q(2) between 5 and 100 GeV2, differentially in Q(2), in the jet transverse energy E-T, in E-T(2)/Q(2) and in the pseudorapidity eta(lab). With the renormalization scale mu(R) = E-T, perturbative QCD calculations in next-to-leading order (NLO) give a good description of the data in most of the phase space. Significant discrepancies are observed only for jets in the proton beam direction with ET below 20 GeV and Q2 below 20 GeV2. This corresponds to the region in which NLO corrections are largest and further improvement of the calculations is thus of particular interest.
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| 11. |
- Adloff, C, et al.
(författare)
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Search for excited neutrinos at HERA
- 2002
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Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 525:1-2, s. 9-16
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Tidskriftsartikel (refereegranskat)abstract
- We present a search for excited neutrinos using e(-) p data taken by the H1 experiment at HERA at a center-of-mass energy of 318 GeV with an integrated luminosity of 15 pb(-1). No evidence for excited neutrino production is found. Mass dependent exclusion limits are determined for the ratio of the coupling to the compositeness scale, f/Lambda, independently of the relative couplings to the SU(2) and U(1) gauge bosons. These limits extend the excluded region to higher masses than has been possible in previous searches at other colliders.
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| 12. |
- Adloff, C, et al.
(författare)
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Search for odderon-induced contributions to exclusive pi(0) photoproduction at HERA
- 2002
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Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 544:1-2, s. 35-43
-
Tidskriftsartikel (refereegranskat)abstract
- A search for contributions to the reaction ep --> epi(0)N* from photon-odderon fusion in the photoproduction regime at HERA is reported, at an average photon-proton centre-of-mass energy = 215 GeV. The measurement proceeds via detection of the pi(0) decay photons, a leading neutron from the N* decay, and the scattered electron. No pi(0) signal is observed and an upper limit on the cross section for the photon-odderon fusion process of sigma(gammap --> pi(0)N*) < 49 nb at the 95% confidence level is derived, integrated over the experimentally accessible range of the squared four-momentum transfer at the nucleon vertex 0.02 < < 0.3 GeV2. This excludes a recent prediction from a calculation based on a non-perturbative QCD model of a photon-odderon fusion cross section above 200 nb. (C) 2002 Elsevier Science B.V. All rights reserved.
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| 13. |
- Adloff, C, et al.
(författare)
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Search for QCD instanton-induced processes in deep-inelastic scattering at HERA
- 2002
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Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 25:4, s. 495-509
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Tidskriftsartikel (refereegranskat)abstract
- Signals of QCD instanton-induced processes are searched for in deep-inelastic scattering (DIS) at the electron-proton collider HERA in a kinematic region defined by the Bjorken-scaling variables x > 10(-3), 0.1 < y < 0.6 and photon virtualities 10 less than or similar to Q(2) < 100 GeV2. Several observables characterising hadronic final state properties of QCD instanton-induced events are exploited to identify a potentially instanton-enriched domain. While an excess of events with instanton-like topology is observed it cannot be claimed significant given the uncertainty of the standard DIS background simulation. Upper limits on the cross-section for instanton-induced processes of between 60 pb and 1000 pb are set dependent on the kinematic domain considered. The data do not exclude the cross-section predicted by instanton perturbation theory for small instanton sizes. At large instanton sizes a naive extrapolation of instanton perturbation theory yields a cross-section in the range of sensitivity of this study. Such a cross-section is not observed, in agreement with non-perturbative lattice simulations of the QCD vacuum.
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| 14. |
- Andersson, Hanna, et al.
(författare)
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Natur på skolgården för lärande, hälsa och hållbarhet
- 2024. - 2024
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Rapport (populärvet., debatt m.m.)abstract
- Gröna och artrika utemiljöer främjar barns och ungas välbefinnande och kunskap, bådegenom hälsofördelar kopplade till biologisk mångfald och genom att skapa förutsättningarför lek och lärande om natur och miljöfrågor. Skolgården skulle kunna bidra till allt detta,men är idag i hög grad en outnyttjad plats för biologisk mångfald och klimatanpassningav städer. I denna policy brief presenteras huvudsakliga motiv och möjliga åtgärder för attutveckla gröna miljöer och biologisk mångfald på skolgårdar och förskolegårdar.
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| 15. |
- Andersson, Mats X., 1977, et al.
(författare)
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Chloroplast biogenesis. Regulation of lipid transport to the thylakoid in chloroplasts isolated from expanding and fully expanded leaves of pea.
- 2001
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Ingår i: Plant physiology. - 0032-0889. ; 127:1, s. 184-93
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Tidskriftsartikel (refereegranskat)abstract
- To study the regulation of lipid transport from the chloroplast envelope to the thylakoid, intact chloroplasts, isolated from fully expanded or still-expanding pea (Pisum sativum) leaves, were incubated with radiolabeled lipid precursors and thylakoid membranes subsequently were isolated. Incubation with UDP[(3)H]Gal labeled monogalactosyldiacylglycerol in both envelope membranes and digalactosyldiacylglycerol in the outer chloroplast envelope. Galactolipid synthesis increased with incubation temperature. Transport to the thylakoid was slow below 12 degrees C, and exhibited a temperature dependency closely resembling that for the previously reported appearance and disappearance of vesicles in the stroma (D.J. Morré, G. Selldén, C. Sundqvist, A.S. Sandelius [1991] Plant Physiol 97: 1558-1564). In mature chloroplasts, monogalactosyldiacylglycerol transport to the thylakoid was up to three times higher than digalactosyldiacylglycerol transport, whereas the difference was markedly lower in developing chloroplasts. Incubation of chloroplasts with [(14)C]acyl-coenzyme A labeled phosphatidylcholine (PC) and free fatty acids in the inner envelope membrane and phosphatidylglycerol at the chloroplast surface. PC and phosphatidylglycerol were preferentially transported to the thylakoid. Analysis of lipid composition revealed that the thylakoid contained approximately 20% of the chloroplast PC. Our results demonstrate that lipids synthesized at the chloroplast surface as well as in the inner envelope membrane are transported to the thylakoid and that lipid sorting is involved in the process. Furthermore, the results also indicate that more than one pathway exists for galactolipid transfer from the chloroplast envelope to the thylakoid.
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| 16. |
- Andersson, Mats X., 1977, et al.
(författare)
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The involvement of cytosolic lipases in converting phosphatidyl choline to substrate for galactolipid synthesis in the chloroplast envelope :
- 2004
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Ingår i: Biochimica et Biophysica Acta-Molecular and Cell Biology of Lipids. - : Elsevier BV. - 1388-1981. ; 1684:1-3, s. 46-53
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Tidskriftsartikel (refereegranskat)abstract
- Here we report that cytosolic phospholipases are involved in the utilization of phosphatidylcholine (PC) as substrate for chloroplast-localized synthesis of monogalactosyldiacylglycerol (MGDG). Isolated chloroplasts were pre-incubated with lysoPC and [C-14]18:0-CoA to form [C-14]PC. When soluble plant proteins (cytosol) and UDP-galactose were added, [C-14] MGDG was formed. An inhibitor of phospholipase D markedly lowered the formation of [C-14]MGDG, whereas thermolysin pretreatment of the chloroplasts was without effect. The cytosolic activity resided in the >100-kDa fraction. In a second approach, [C-14]PC-containing lipid mixtures were incubated with cytosol. Degradation of [C-14]PC to [C-14]diacylglycerol was highest when the lipid composition of the mixture mimicked that of the outer chloroplast envelope. We also investigated whether PC of extraplastidic origin could function as substrate for MGDG synthesis. Isolated chloroplasts were incubated with enriched endoplasmic reticulum containing radiolabelled acyl lipids. In the presence of cytosol and UDPgalactose, there was a time-dependent transfer of [C-14]PC from this fraction to chloroplasts, where [C-14]MGDG was formed. We conclude that chloroplasts recruit cytosolic phospholipase D and phosphatidic acid phosphatase to convert PC to diacylglycerol. Apparently, these lipases do not interact with chloroplast surface proteins, but rather with outer membrane lipids, either for association to the envelope or for substrate presentation. (C) 2004 Elsevier B.V. All rights reserved.
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| 17. |
- Andersson Schwarz, Jonas, 1978-, et al.
(författare)
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Opinioner och offentligheter online : Vad gör en politisk utsaga framgångsrik? Den användardrivna kommunikationens villkor. Slutrapport
- 2015
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- ”Vad gör en politisk utsaga framgångsrik? Den användardrivna kommunikationens villkor” är ett ettårigt forskningsprojekt delfinansierat av Internetfonden, Riksbankens Jubileumsfond, Retriever AB, M-Brain AB samt Forsman & Bodenfors AB. Projektledare har varit Jonas Andersson Schwarz, som tillsammans med Johan Hammarlund, Stefan di Grado och Magnus Kjellberg har analyserat data från Twitter och rikspress i syfte att skapa ny kunskap om villkoren för politisk kommunikation i de sociala mediernas tidevarv. Huvudfokus har varit att undersöka vilka specifika faktorer som spelar in för delning av politiska tweets samt vilken typ av material från sociala medier som fångas upp av traditionella nyhetsmedier och vice versa. Samspelet mellan sociala medier och massmedier formar de bilder som görs av sociala medier i samhället, och omvänt: det formar de bilder som görs av massmedia likväl.
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| 18. |
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| 19. |
- Berglund, Johan, et al.
(författare)
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New Test Method for Detection and Analysis of Burrs and Slivers in Trimming and Punching Aluminium Sheet Metal
- 2014
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- A large problem when trimming or punching aluminium sheet is thecreation of burrs and slivers which degrade the quality of the produced parts. A semiindustrial test for evaluating trimming of aluminium has been further developed toinclude pre-stressing and pre-straining of the sheet material before trimming. Thesemi-industrial test results now show good correlation to industrial productionoutcomes.
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| 20. |
- Coslovich, Francesco, 1990, et al.
(författare)
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Added resistance, heave and pitch for the KVLCC2 tanker using a fully nonlinear unsteady potential flow boundary element method
- 2021
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Ingår i: Ocean Engineering. - : Elsevier Ltd. - 0029-8018 .- 1873-5258. ; 229
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, a fully nonlinear unsteady potential flow method is used to predict added resistance, heave and pitch for the KVLCC2 hull in regular head waves at design speed. The method presents a nonlinear decomposition of the velocity potential and the wave field and an adaptive grid refinement. A formulation for the acceleration potential is used to obtain the pressure. To improve computational efficiency, a Barnes-Hut algorithm is introduced. A grid dependency study and a study on the impact of different time steps on the solution are performed. Numerical results have been compared with experimental data for the design speed. A general good agreement is found for added resistance, especially for longer waves. Heave and pitch are properly computed for all wave lengths in the range λ/Lpp=0.4 to 1.4. © 2021 The Author(s)
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| 21. |
- Dimova, Tanya, et al.
(författare)
-
Maternal Foxp3 expressing CD4+ CD25+ and CD4+ CD25- regulatory T-cell populations are enriched in human early normal pregnancy decidua : a phenotypic study of paired decidual and peripheral blood samples.
- 2011
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Ingår i: American Journal of Reproductive Immunology and Microbiology. - : John Wiley & Sons. - 8755-8920 .- 1046-7408. ; 66:Suppl 1, s. 44-56
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Tidskriftsartikel (refereegranskat)abstract
- PROBLEM: Regulatory T cells (Treg cells), a small subset of CD4(+) T cells maintaining tolerance by immunosuppression, are proposed contributors to the survival of the fetal semiallograft. We investigated Treg cells in paired decidual and peripheral blood (PB) samples from healthy women in early pregnancy and PB samples from non-pregnant women.METHOD OF STUDY: Distribution, location, cytokine mRNA, and phenotype were assessed in CD4(+) CD25(+) Treg cells from paired samples using immunohistochemistry, immunofluorescence, flow cytometry, and real-time quantitative RT-PCR.RESULTS: The presence and in situ distribution of CD4(+) Foxp3(+) Treg cells in decidua are hereby demonstrated for the first time. Three Foxp3(+) cell populations, CD4(+) CD25(++) Foxp3(+), CD4(+) CD25(+) Foxp3(+), and CD4(+) CD25(-) Foxp3(+), were enriched locally in decidua. In contrast, no statistically significant difference in numbers of circulating Treg cells between pregnant and non-pregnant women was found. The Foxp3(+) cells expressed the surface molecules CD45RO, CTLA-4, CD103, Neuropilin-1, LAG-3, CD62L, and TGFβ1 mRNA consistent with Treg phenotype. The population of CD4(+) CD25(-) Foxp3(+) cells, not described in human decidua before, was enriched 10-fold compared with PB in paired samples. Their cytokine expression was often similar to Th3 profile, and the Foxp3 mRNA expression level in CD4(+) CD25(-) cells was stable and comparable to that of CD4(+) CD25(+) Treg cells implying that the majority of CD4(+) CD25(-) Foxp3(+) cells might be naïve Treg cells.CONCLUSION: (i) There is a local enrichment of Treg cells in decidua (ii) The exclusive accumulation of decidual CD4(+) CD25(-) Foxp3(+) cells suggests an additional reservoir of Foxp3(+) naïve Treg cells that can be converted to 'classical' Treg cells in uterus.
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| 22. |
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| 23. |
- Grooten, Wilhelmus Johannes Andreas, et al.
(författare)
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Health risk appraisals in Swedish occupational health services
- 2016
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Ingår i: Work. - : IOS Press. - 1051-9815 .- 1875-9270. ; 55:4, s. 849-859
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Tidskriftsartikel (refereegranskat)abstract
- Background: Health risk appraisals (HRAs) in occupational health services (OHS) in Sweden are very commonly used for health promotion issues, but not much research has explored the extent and nature of individual feedback that is provided.Objectives: This study aimed to describe and explore HRAs in OHS regarding the content of the feedback in relation to the individual status and overall employee satisfaction.Methods: Feedback (evaluation and advice) and employee satisfaction with HRA were studied in employees that participated in health risk appraisals with a specific feedback session (HRA-F) (n = 272) and employees that participated in a single session (HRA-S) (n = 104). Associations between feedback and individual status concerning life style were assessed with Cohen's kappa (k).Results: The employees received mainly information and advice for improvement on health and lifestyle issues (89-100%), while advice for improvement of working conditions was less common (15-59%). The feedback provided on life style was not based on individual status (k < 0.4), except for smoking and risky alcohol consumption (k > 0.55). A great majority of employees reported good overall satisfaction with their HRAs.Conclusions: The evaluation and feedback given to employees after HRAs should be based more on HRA-results and advice could be focused more on work-related factors.
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| 24. |
- Grooten, Wilhelmus Johannes Andreas, et al.
(författare)
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Non-participation in initial and repeated health risk appraisals : a drop-out analysis based on a health project
- 2019
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Ingår i: BMC Health Services Research. - : Springer Science and Business Media LLC. - 1472-6963. ; 19:1
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Health risk assessment (HRAs) are commonly used by occupational health services (OHS) to aid workplaces in keeping their employees healthy, but for unknown reasons, many employees choose not to participate in the HRAs. The aim of the study was to explore whether demographic, lifestyle and health-related factors in employees are associated with non-participation in initial and repeated HRAs.METHODS: In an OHS-based health project, 2022 municipal employees were asked to participate in three repeated HRAs. Multiple logistic regression analyses were used so as to determine associations between non-participating and demographic, lifestyle and health-related factors (e.g. biomarkers).RESULTS: Among the employees who were asked to participate in the health project, more than half did not participate in any HRA and among those who did, more than one third did not participate in repeated HRAs. Young age, male sex and being employed in the Technical department or Health and Social Care department in comparison with being employed in the department for Childcare and Education were factors significantly associated with non-participation in the initial HRA. These factors, together with being on sick leave and having unhealthy dietary habits, were factors associated with non-participation in repeated HRAs.CONCLUSIONS: Among the non-participators in initial HRAs and in repeated HRAs younger men and those already related to ill-health were overrepresented. This implicates that health care providers to a higher extent should focus on "those most needed" and that employers should be more engaged in results of repeated HRA's. Future studies should focus on modifiable variables that could make the HRAs more attractive and inclusive.
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| 25. |
- Hedlind, Mikael, 1979-, et al.
(författare)
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Machining description as a view of STEP-NC data
- 2008
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Ingår i: Proceedings of 2nd Swedish Production Symposium. - Stockholm, Sweden.
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Konferensbidrag (refereegranskat)abstract
- Machining description for a CNC machining process has the purpose to give information about the machining process and relations between, product, process and resources. Currently used information model requires time consuming and expensive procedures during the manufacturing preparation process to create this documentation. This paper presents how machining descriptions can be generated more efficient. We have studied how ISO 10303 standard for product data representation and exchange, known as STEP, can be utilized in the manufacturing preparation process. We present how information requirements for machining descriptions containing a relationship between a machined face, its tolerances and used cutting tool can be met. To demonstrate our research result we have developed a prototype system where STEP data models of the machiningprocess, workpiece with tolerances, fixture and cutting tools are used and integrated. We have proven that information separation of data, to create machining descriptions for CNC machining, is currently done unnecessarily early in the manufacturing preparation process.
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| 26. |
- Hedlind, Mikael, 1979-, et al.
(författare)
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Manufacturing resource modelling for model driven operation planning
- 2010
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Ingår i: Process Machine Interactions (PMI). - 9780986633102
-
Konferensbidrag (refereegranskat)abstract
- Models of manufacturing resources as machine tools, fixtures and cutting tools contribute to efficient and simplified operation planning. With operation planning domain concept, defined in ontology and used during modelling of coherent ISO 10303-214 conforming data models of manufacturing resources, stable implementation solutions are ensured while capable of representing current manufacturing resources and resources developed in the future. Using similarities between different types of resources, a unified modelling approach may be applied independent of the type of object. Information classes as interfaces, kinematics, performance and behavior are identified and related to corresponding construct of the standardized product generic schema. With the common representation of shared information between applications domains as operation planning, maintenance and factory layout design, presented result contributes to set the basis for a digital factory used in virtual manufacturing to continuously improve the production system.
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| 27. |
- Hedlind, Mikael, et al.
(författare)
-
Model based machining descriptions
- 2010
-
Ingår i: CIRP ICME ’10 - 7<sup>th</sup> CIRP International Conference on INTELLIGENT COMPUTATION IN MANUFACTURING ENGINEERING. - Capri, Italy. - 9788895028651
-
Konferensbidrag (refereegranskat)abstract
- Today’s CAD/CAM systems make it possible to manage features, dimensions and tolerances from design through process and operations planning in their internal proprietary data model. For manufacturing purposes information is then split into different documents for setup and machining operation besides NC code. A demonstrator has been developed based on a case study and the ISO 10303 standard as a coherent data model for representing relationships between manufacturing features, machined faces, tolerances and used cutting tools. When the information model is fully exploited, the fragmentation of data as well as manufacturing preparation time and administration cost are significantly reduced.
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| 28. |
- Jonsson, Johanna, et al.
(författare)
-
Exploring multidimensional operationalizations of precarious employment in swedish register data – a typological approach and a summative score approach
- 2021
-
Ingår i: Scandinavian Journal of Work, Environment and Health. - : Scandinavian Journal of Work, Environment and Health. - 0355-3140 .- 1795-990X. ; 47:2, s. 117-126
-
Tidskriftsartikel (refereegranskat)abstract
- Objectives This study aimed to explore multidimensional operationalizations of precarious employment (PE) in Swedish register data using two approaches: (i) a typological approach and (ii) a dimensional, summative scale approach. It also examined the distribution of sociodemographic and occupational characteristics of precarious employees in Sweden. Method Register data was retrieved on individuals and their employers in the Swedish workforce. Five items corresponding to three dimensions of PE were operationalized: contractual relationship insecurity, contractual temporariness, multiple jobs/sectors, income level, and lack of unionization. First, latent class analysis was applied and a typology of six employment types emerged. Second, a summative scale was constructed by scor-ing all PE-items. Results Three types of PE were found using the typological approach, which were characterized by direct employment, solo self-employment and multiple job holding, respectively. The summative scale score ranged between-10 and +2 (average:-1.8). Particularly poor scores were seen for solo self-employed, multiple job hold-ers/multiple sectors, and low income. Female gender, young age, low education and foreign origin were prone to precariousness. PE was more frequent among certain economic sectors and occupations. Conclusions Using an existing register of labor market data, two operationalizations of PE were constructed and rendered promising for exposure assessment. Hence, the operationalizations could be of interest for countries with similar data structure. Both approaches highlighted precarious combinations of employment conditions and pointed towards the existence of a wide continuum of precariousness on the labor market. Etiological studies and research assessing trends over time are needed to validate these findings.
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| 29. |
- Jonsson, Johanna, et al.
(författare)
-
Low-quality employment trajectories and risk of common mental disorders, substance use disorders and suicide attempt : a longitudinal study of the Swedish workforce
- 2021
-
Ingår i: Scandinavian Journal of Work, Environment and Health. - : Scandinavian Journal of Work, Environment and Health. - 0355-3140 .- 1795-990X. ; 47:7, s. 509-520
-
Tidskriftsartikel (refereegranskat)abstract
- Objective High-quality longitudinal evidence exploring the mental health risk associated with low-quality employment trajectories is scarce. We therefore aimed to investigate the risk of being diagnosed with common mental disorders, substance use disorders, or suicide attempt according to low-quality employment trajectories.Methods A longitudinal register-study based on the working population of Sweden (N=2 743 764). Employment trajectories (2005–2009) characterized by employment quality and pattern (constancy, fluctuation, mobility) were created. Hazard ratios (HR) were estimated using Cox proportional hazards regression models for first incidence (2010–2017) diagnosis of common mental disorders, substance use disorders and suicide attempt as dependent on employment trajectories.Results We identified 21 employment trajectories, 10 of which were low quality (21%). With the exception of constant solo self-employment, there was an increased risk of common mental disorders (HR 1.07–1.62) and substance use disorders (HR 1.05–2.19) for all low-quality trajectories. Constant solo self-employment increased the risk for substance use disorders among women, while it reduced the risk of both disorders for men. Half of the low-quality trajectories were associated with a risk increase of suicide attempt (HR 1.08–1.76).Conclusions Low-quality employment trajectories represent risk factors for mental disorders and suicide attempt in Sweden, and there might be differential effects according to sex – especially in terms of self-employment. Policies ensuring and maintaining high-quality employment characteristics over time are imperative. Similar prospective studies are needed, also in other contexts, which cover the effects of the Covid-19 pandemic as well as the mechanisms linking employment trajectories with mental health.
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| 30. |
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| 31. |
- Kjellberg, Anders, et al.
(författare)
-
Ett fackligt landskap i omvandling
- 2002
-
Ingår i: Medlemmen, facket och flexibiliteten: Svensk fackföreningsrörelse i det moderna arbetslivet. - 91 7924 156 5 ; , s. 27-51
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Det svenska fackliga landskapet befinner sig i stark omvandling. Ständiga sammanslagningar medför allt färre men större fackförbund, som å andra sidan hotas av sjunkande organisationsgrad, särskilt bland de unga. Den svenska fackföreningsstrukturen är fortfarande världens mest socialt segregerade genom uppdelningen i LO, TCO och SACO. Nya fackliga konstellationer framträder inte desto mindre på tvärs av de sociala och organisatoriska skiljelinjerna, såsom "Facken inom industrin". Idag utgör kvinnorna en majoritet av fackmedlemmarna och de med utländsk bakgrund en växande andel. Likaså är tjänstemännen numera fler än arbetarna, vilket minskat LO:s andel av fackmedlemmarna. Förutom att redovisa sådana förändringar av det fackliga landskapet diskuteras vad som får arbetare och tjänstemän att bli fackmedlemmar eller att avstå från medleskap.
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| 32. |
- Kjellberg, J. Magnus, 1972, et al.
(författare)
-
Acyl-CoA dependent acylation of phospholipids in the chloroplast envelope.
- 2000
-
Ingår i: Biochimica et biophysica acta. - 0006-3002. ; 1485:2-3, s. 100-10
-
Tidskriftsartikel (refereegranskat)abstract
- Acyl-CoAs are substrates for acyl lipid synthesis in the endoplasmic reticulum. In addition, they may also be substrates for lipid acylation in other membranes. In order to assess whether lipid acylation may have a role in plastid lipid metabolism, we have studied the incorporation of radiolabelled fatty acids from acyl-CoAs into lipids in isolated, intact pea chloroplasts. The labelled lipids were phosphatidylcholine (PC), phosphatidylglycerol (PG), phosphatidylinositol and free fatty acids. With oleoyl-CoA, the fatty acid was incorporated preferably into the sn-2 position of PC and the acylation activity mainly occurred in fractions enriched in inner chloroplast envelope. Added lysoPC stimulated the activity. With palmitoyl-CoA, the fatty acid was incorporated primarily into the sn-1 position of PG and the reaction occurred at the surface of the chloroplasts. As chloroplast-synthesized PG generally contains 16C fatty acids in the sn-2 position, we propose that the acylation of PG studied represents activities present in a domain of the endoplasmic reticulum or an endoplasmic reticulum-derived fraction that is associated with chloroplasts and maintains this association during isolation. This domain or fraction contains a discreet population of lipid metabolizing activities, different from that of bulk endoplasmic reticulum, as shown by that with isolated endoplasmic reticulum, acyl-CoAs strongly labelled phosphatidic acid and phosphatidylethanolamine, lipids that were never labelled in the isolated chloroplasts.
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| 33. |
- Kjellberg, J. Magnus, 1972, et al.
(författare)
-
GTP-dependent phosphorylation and GTPγS-dependent thiophosphorylation of proteins and lipids in chloroplasts isolated from leaves of spinach (Spinacia oleracea)
- 2004
-
Ingår i: Plant Science. - : Elsevier BV. - 0168-9452. ; 166:3, s. 601-607
-
Tidskriftsartikel (refereegranskat)abstract
- We have studied the interaction of GTP and its slowly-hydrolysable analogue, GTPγS, with isolated chloroplast envelope, stroma and thylakoids from spinach (Spinacia oleracea). We used a filter assay to monitor [35S]GTPγS-dependent labelling of the chloroplast fractions. All fractions were labelled by [35S]GTPγS and the labelling was competed by unlabelled GTPγS, GTP and GDP over ATP and GMP. The label associated with the chloroplast fractions was, at least partly, covalent thiophosphate labelling of proteins as well as traces of lipid labelling. The pattern of [35S]GTPγS-dependent protein thiophosphorylation differed from [35S]ATPγS dependent thiophosphorylation as well as from [γ-32P]GTP and [γ-32P]ATP dependent protein phosphorylation. Incubation of chloroplast fractions with [γ-32P]GTP also resulted in heavy labelling of several lipids and lipid phosphorylation was markedly more prominent than lipid thiophosphorylation. The results are discussed in relation to the possible roles of guanine nucleotides in the regulation of thylakoid biogenesis
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| 34. |
- Kjellberg, Sanna, et al.
(författare)
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Utility of single versus multiple breath washout in adult asthma
- 2018
-
Ingår i: Clinical Physiology and Functional Imaging. - : Wiley. - 1475-0961. ; 38:6, s. 936-943
-
Tidskriftsartikel (refereegranskat)abstract
- Nitrogen multiple breath washout (N-2 MBW) is a sensitive method to identify peripheral airway involvement in asthma, but is a time-consuming test. The N-2 vital capacity single breath (VC SBW) test offers greater time efficiency, but concordance with N-2 MBW is poorly understood. The prevalence of peripheral airway abnormality was determined by N-2 MBW and N-2 SBW tests in 194 asthmatic subjects aged 18-1years. N-2 MBW data were related to findings in 400 healthy controls, aged 17-71years, while N-2 SBW data were compared to findings in 224 healthy controls, aged 15-65years, to derive equipment-specific reference values. Amongst asthmatic subjects, relationships between N-2 SBW and N-2 MBW outcomes were studied. N-2 SBW relationship with clinical history, spirometry, blood eosinophils and fraction exhaled nitric oxide (FENO) data was also explored. The prevalence of peripheral airway involvement (i.e. abnormal ventilation distribution) determined by N-2 SBW-derived phase III slope (N-2 S-III) was 247%, compared to 44% determined by N-2 MBW-derived lung clearance index (LCI) (P<0001). Predictors of abnormal N-2 S-III were older age, smoking history and lower FEV1. N-2 SBW offers lower sensitivity than N-2 MBW to detect small airway dysfunction in adult asthma, but may be a marker of more severe disease.
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| 35. |
- Kjellberg, Torsten, et al.
(författare)
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The machine tool model-A core part of the digital factory
- 2009
-
Ingår i: CIRP annals. - : Elsevier BV. - 0007-8506 .- 1726-0604. ; 58:1, s. 425-428
-
Tidskriftsartikel (refereegranskat)abstract
- Machine tool models - the core parts of manufacturing systems - are important for many purposes during development of new or existing systems, from investment, through process planning, NC, layout design, usage, to end of life. Today a lot of important machine tool information is not managed and stored for easy reuse. A machine tool modelling approach is presented and structured in line with principles for generic standards utilizing a manufacturing system ontology for modelling machine tool concepts. It forms a contribution to management of information and knowledge in manufacturing.
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| 36. |
- Kjellberg, Tobias, et al.
(författare)
-
Tracking the Motion of Box Jellyfish
- 2014
-
Konferensbidrag (refereegranskat)abstract
- In this paper we investigate a system for tracking the motion of box jellyfish tripedalia cystophora in a special test setup. The goal is to measure the motor response of the animal given certain visual stimuli. The approach is based on tracking the special sensory structures – the rhopalia – of the box jellyfish from high-speed video sequences. We have focused on a realtime system with simple building blocks in our system. However, using a combination of simple intensity based detection and model based tracking we achieve promising tracking results with up to 95% accuracy.
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| 37. |
- Larsson, Karin E., 1958, et al.
(författare)
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LysoPC acyltransferase/PC transacylase activities in plant plasma membrane and plasma membrane-associated endoplasmic reticulum
- 2007
-
Ingår i: BMC Plant Biology. - 1471-2229.
-
Tidskriftsartikel (refereegranskat)abstract
- Background The phospholipids of the plant plasma membrane are synthesized in the endoplasmic reticulum (ER). The majority of these lipids reach the plasma membrane independently of the secretory vesicular pathway. Phospholipid delivery to the mitochondria and chloroplasts of plant cells also bypasses the secretory pathway and here it has been proposed that lysophospholipids are transported at contact sites between specific regions of the ER and the respective organelle, followed by lysophospholipid acylation in the target organelle. To test the hypothesis that a corresponding mechanism operates to transport phospholipids to the plasma membrane outside the secretory pathway, we investigated whether lysolipid acylation occurs also in the plant plasma membrane and whether this membrane, like the chloroplasts and mitochondria, is in close contact with the ER. Results The plant plasma membrane readily incorporated the acyl chain of acyl-CoA into phospholipids. Oleic acid was preferred over palmitic acid as substrate and acyl incorporation occurred predominantly into phosphatidylcholine (PC). Phospholipase A2 stimulated the reaction, as did exogenous lysoPC when administered in above critical micellar concentrations. AgNO3 was inhibitory. The lysophospholipid acylation reaction was higher in a membrane fraction that could be washed off the isolated plasma membranes after repeated freezing and thawing cycles in a medium with lowered pH. This fraction exhibited several ER-like characteristics. When plasma membranes isolated from transgenic Arabidopsis expressing green fluorescent protein in the ER lumen were observed by confocal microscopy, membranes of ER origin were associated with the isolated plasma membranes. Conclusions We conclude that a lysoPC acylation activity is associated with plant plasma membranes and cannot exclude a PC transacylase activity. It is highly plausible that the enzyme(s) resides in a fraction of the ER, closely associated with the plasma membrane, or in both. We suggest that this fraction might be the equivalent of the mitochondria associated membrane of ER origin that delivers phospholipids to the mitochondria, and to the recently isolated ER-derived membrane fraction that is in close contact with chloroplasts. The in situ function of the lysoPC acylation/PC transacylase activity is unknown, but involvement in lipid delivery from the ER to the plasma membrane is suggested.
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| 38. |
- Li, Yujiang, 1985-, et al.
(författare)
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Representation and exchange of digital catalogues of cutting tools
- 2014
-
Ingår i: ASME 2014 International Manufacturing Science and Engineering Conference, MSEC 2014 Collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. - 9780791845806 ; , s. V001T04A027-
-
Konferensbidrag (refereegranskat)abstract
- Information management for manufacturing resources such as cutting tools is an important research topic in the context of cloud manufacturing. Vendors and customers usually use catalogues to communicate information for such manufacturing resource. Incompatibilities of information in syntax, semantics, and structure among supply chains often result in inefficient manual sharing and management of the catalogue information. It is difficult for cloud based applications to pool information from various sources. This communication failure calls for a system neutral solution for data modeling and exchange to enhance interoperability of the cutting tool catalogue information. Previous studies has present solutions for representation of the cutting tool information with STEP AP242 (ISO/DIS 10303-242) with semantic classification referring to a PLib (ISO 13584, Part Library) based dictionary. This approach can be extended for the catalogue modeling, due to functionalities for specification and configuration control of general product variants in the same standard. With a modeling approach with standardized information schemas, system architecture to guide implementation is proposed to enhance the communication in practice. Relative elements to represent vendors' catalogues and customers' requirements are modeled. Associations to the PLib-based dictionary complete semantics and enable information mapping between vendors and customers. Principles of the mapping are identified to facilitate implementation of related software systems. Prototypes are developed to verify the proposed system architecture. The proposed solution is promising to migrate to other types of products than cutting tools, because the data models are based on the general product models defined in AP242.
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| 39. |
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| 40. |
- Lundgren, Magnus, et al.
(författare)
-
A systematic approach for product realization instructions in a model drivenenvironment : towards a three level instruction system development process
- 2008
-
Konferensbidrag (refereegranskat)abstract
- Instructions and instruction systems are considered as important pillars in the productrealization process. However, often the activities to create, layout and use instructions arebased on tradition rather than a strategic thought in the industry today. In a model drivenengineering context there is a risk to focus on the information system at the sacrifice of theimportant operator interface. A three level instruction system development process isintroduced as a solution to establish a holistic instruction system: 1) Instruction systemdesign, 2) design framework for instructions, and 3) realize instruction. Studies indicatethat there is a great potential in how instruction systems are used due to both theeffectiveness in the creation of the instruction and the probability of non-conformities dueto the instruction formulation and layout.
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| 41. |
- Lundgren, Magnus, et al.
(författare)
-
Human-Centered Model-driven Process and Quality Planning
- 2019
-
Ingår i: Procedia CIRP. - : Elsevier BV. - 2212-8271. ; , s. 362-367
-
Konferensbidrag (refereegranskat)abstract
- Process and quality planning are prerequisites for the production of qualified products at competitive cost. Today´s document-based work methods are not effective as valuable time is spent on document creation and document management instead of being spent on innovation and process improvements. Information duplication is an inevitable consequence with current document-based work methods where the same information is described in different ways, at many places, across many different documents. This paper presents a model-driven approach where vital manufacturing information is described once, at one place, and in one way, enabling improved work methods for cross-organizational process and quality planning.
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| 42. |
- Lundgren, Magnus, et al.
(författare)
-
MODEL-BASED INTERACTIVE LEARNING OF PROCESS PLANNING
- 2014
-
Konferensbidrag (refereegranskat)abstract
- Process planning is a central, knowledge extensive and important activityin a manufacturing company. During process planning, countless decisions are made,many times based upon the process planner´s tacit knowledge, based on years ofexperience. The knowledge gap between the expert and the novice is wide.Narrowing this gap, taking the novice towards becoming expert, is an objective ofeducation. This paper presents a solution for model-based interactive learning ofprocess planning, validated through application in master level productionengineering courses.
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| 43. |
- Lundgren, Magnus, et al.
(författare)
-
Model Driven Manufacturing Process Design and Managing Quality
- 2016
-
Ingår i: Procedia CIRP. - : Elsevier. - 2212-8271. ; , s. 299-304
-
Konferensbidrag (refereegranskat)abstract
- Besides decisions in design, decisions made in process planning determine the conditions for manufacturing the right quality. Hence systematic process planning is a key enabler for robust product realization from design through manufacturing. Current work methods for process planning and quality assurance lack efficient system integration. As a consequence companies spend unnecessary lot of non-value adding time on managing quality. This paper presents a novel model-based approach to integrate process planning and quality assurance. The presented model enables a more efficient and holistic way for managing quality from design to manufacturing. New possibilities to communicate process design intent and present important quality assurance information in a more structured and comprehensive way is also enabled.
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| 44. |
- Lundgren, Magnus, et al.
(författare)
-
Model-driven Process Planning and Quality Assurance
- 2015
-
Ingår i: 9TH CIRP CONFERENCE ON INTELLIGENT COMPUTATION IN MANUFACTURING ENGINEERING - CIRP ICME '14. - : Elsevier BV. ; , s. 209-214
-
Konferensbidrag (refereegranskat)abstract
- Systematic process planning is a key enabler for robust product realization from design through manufacturing. Every process and operation must be designed in the best possible way to ensure that the overall process chain leads to the right product quality. During the last two decades a shift from inspection of manufactured products to a more holistic approach with quality assurance as an integrated activity throughout the product realization process has emerged in manufacturing industry. The importance of the principles addressed in the methods and tools used in automotive industry for quality management is indisputable. However, the tasks of creating and managing documents for Process Failure Mode and Effect Analysis (PFMEA), Control plans, Initial process studies and Measurement System Analysis (MSA) results in high workload. Also, lack of interoperability between different computer applications used in process planning and quality assurance results in information fragmentation, data duplication and potential data inconsistency. This paper proposes a novel, model driven approach for process planning integrating quality assurance which emphasizes the application of digital models to create, represent and use information of products, processes and resources. By reducing the amount of data and document duplication, the presented model driven approach has potential to radically increase the direct value adding part of manufacturing engineer's daily work also contributing to achieve a more holistic view in interdisciplinary work between different experts in product realization.
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| 45. |
- Lundgren, Magnus, et al.
(författare)
-
Process Design as Fundament in Efficient Process Planning
- 2018
-
Ingår i: Procedia Manufacturing. - : Elsevier BV. - 2351-9789.
-
Konferensbidrag (refereegranskat)abstract
- Process planning is the activity of determining the manufacturing operations needed to produce a product. The knowledge work of process planning has been thoroughly investigated. Several ideas to automate process planning have been proposed but their success in practice has not yet been realized. Little attention has been given to design as an inevitable element in process planning and the role of human expertise in process design. From the premise that competent planners are a primary source of productivity this paper discusses process design, the role of human expertise and how CAPP systems could support human decision making.
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| 46. |
- Orellana, Cecilia, et al.
(författare)
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Precarious employment, business performance and occupational injuries : a study protocol of a register-based Swedish project
- 2019
-
Ingår i: BMJ Open. - : BMJ. - 2044-6055. ; 9:2
-
Tidskriftsartikel (refereegranskat)abstract
- Introduction There is uncertainty regarding the trends in occupational injuries (OIs) in Sweden due to a significant and increasing problem with under-reporting to injury registers. Under-reporting, in general, is likely to be exacerbated by the rise in precarious employment (PE), a set of unfavourable employment characteristics that would benefit from formal definition and study. PE and global trends are believed also to affect companies and their commitment to health and safety. The present study attempts to bridge these knowledge gaps and presents a study protocol for planned studies, with three main objectives: first, to review the literature for definitions of PE emphasising those that are multidimensional and operationalise components in routinely collected register data; second, to estimate the under-reporting of OI in Swedish registers and third, using results from the first objective, to conduct large, register-based prospective studies, designed to measure effect sizes and interactions between PE, business performance and OI. Methods and analysis First, a scientific literature review will be conducted, including scientific databases and grey literature. Second, data from two major OI registers will be used to estimate the magnitude of under-reporting using capture-recapture methodology. Finally, all residents aged 18-65 in Sweden with any registered income during 2003-2015 will be included. Data sources encompass Swedish population and labour market registers with linkage to both the main OI register with national coverage and hospital records. Trends in PE and OI will be explored, together with risk of OI associated with PE and business performance. Ethics and dissemination The project has been approved by the Regional Ethics Committee, Stockholm (dnr: 2016/2325-31; 2017/2173-32). Dissemination of study results will include a series of peer-reviewed papers, at least one PhD thesis and one report in Swedish, engaging relevant stakeholders. Results will be presented in national and international conferences and through press releases to mass media.
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| 47. |
- Orych, Michal, 1979, et al.
(författare)
-
Speed and delivered power in waves — Predictions with CFD simulations at full scale
- 2023
-
Ingår i: Ocean Engineering. - : Elsevier Ltd. - 0029-8018 .- 1873-5258. ; 285
-
Tidskriftsartikel (refereegranskat)abstract
- An efficient numerical method is proposed to estimate delivered power and speed loss for a ship in wind and waves. The added resistance in waves, obtained with an unsteady potential flow panel method, is added to the calm water resistance from a steady-state potential flow/RANS method coupled with a body force propeller model for self-propulsion. A comparison of numerical and experimental results is made for added resistance, calm water resistance and delivered power. A good agreement is obtained. As a practical application, the approach is used to calculate the weather factor, fw, of the Energy Efficiency Design Index (EEDI). The calculated weather factor is consistent with the values derived from full-scale measurements included in a database of similar ships. © 2023 The Author(s)
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| 48. |
- Oskarsson, Magnus, et al.
(författare)
-
Visual Tracking of Box Jellyfish: A Real-Time Motion Tracking System
- 2015
-
Ingår i: Computer Vision and Pattern Recognition in Environmental Informatics. - : IGI Global. - 9781466694354 - 9781466694361 ; , s. 107-122
-
Bokkapitel (refereegranskat)abstract
- In this chapter a system for tracking the motion of box jellyfish Tripedalia cystophora in a special test setup is investigated. The goal is to measure the motor response of the animal given certain visual stimuli. The approach is based on tracking the special sensory structures - the rhopalia - of the box jellyfish from high-speed video sequences. The focus has been on a real-time system with simple building blocks in the system. However, using a combination of simple intensity based detection and model based tracking promising tracking results with up to 95% accuracy are achieved.
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| 49. |
- Tirado-Gonzalez, Irene, et al.
(författare)
-
Galectin-1 influences trophoblast immune evasion and emerges as a predictive factor for the outcome of pregnancy
- 2013
-
Ingår i: Molecular human reproduction. - : Oxford University Press (OUP). - 1360-9947 .- 1460-2407. ; 19:1, s. 43-53
-
Tidskriftsartikel (refereegranskat)abstract
- Galectin-1 (gal-1) is expressed at the feto-maternal interface and plays a role in regulating the maternal immune response against placental alloantigens, contributing to pregnancy maintenance. Both decidua and placenta contribute to gal-1 expression and may be important for the maternal immune regulation. The expression of gal-1 within the placenta is considered relevant to cell-adhesion and invasion of trophoblasts, but the role of gal-1 in the immune evasion machinery exhibited by trophoblast cells remains to be elucidated. In this study, we analyzed gal-1 expression in preimplantation human embryos and first-trimester decidua-placenta specimens and serum gal-1 levels to investigate the physiological role played by this lectin during pregnancy. The effect on human leukocyte antigen G (HLA-G) expression in response to stimulation or silencing of gal-1 was also determined in the human invasive, proliferative extravillous cytotrophoblast 65 (HIPEC65) cell line. Compared with normal pregnant women, circulating gal-1 levels were significantly decreased in patients who subsequently suffered a miscarriage. Human embryos undergoing preimplantation development expressed gal-1 on the trophectoderm and inner cell mass. Furthermore, our in vitro experiments showed that exogenous gal-1 positively regulated the membrane-bound HLA-G isoforms (HLA-G1 and G2) in HIPEC65 cells, whereas endogenous gal-1 also induced expression of the soluble isoforms (HLA-G5 and -G6). Our results suggest that gal-1 plays a key role in pregnancy maternal immune regulation by modulating HLA-G expression on trophoblast cells. Circulating gal-1 levels could serve as a predictive factor for pregnancy success in early human gestation.
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| 50. |
- Wang, Hao, et al.
(författare)
-
Hepatitis E virus genotype 3 strains and a plethora of other viruses detected in raw and still in tap water.
- 2020
-
Ingår i: Water research. - : Elsevier BV. - 1879-2448 .- 0043-1354. ; 168
-
Tidskriftsartikel (refereegranskat)abstract
- In this study, next generation sequencing was used to explore the virome in 20L up to 10,000L water from different purification steps at two Swedish drinking water treatment plants (DWTPs), and in tap water. One DWTP used ultrafiltration (UF) with 20nm pores, the other UV light treatment after conventional treatment of the water. Viruses belonging to 26 different families were detected in raw water, in which 6-9 times more sequence reads were found for phages than for known environmental, plant or vertebrate viruses. The total number of viral reads was reduced more than 4-log10 after UF and 3-log10 over UV treatment. However, for some viruses the reduction was 3.5-log10 after UF, as for hepatitis E virus (HEV), which was also detected in tap water, with sequences similar to those in raw water and after treatment. This indicates that HEV had passed through the treatment and entered into the supply network. However, the viability of the viruses is unknown. In tap water 10-130 International Units of HEV RNA/mL were identified, which is a comparable low amount of virus. The risk of getting infected through consumption of tap water is probably negligible, but needs to be investigated. The HEV strains in the waters belonged to subtypes HEV3a and HEV3c/i, which is associated with unknown source of infection in humans infected in Sweden. None of these subtypes are common among pigs or wild boar, the major reservoirs for HEV, indicating that water may play a role in transmitting this virus. The results indicate that monitoring small fecal/oral transmitted viruses in DWTPs may be considered, especially during community outbreaks, to prevent potential transmission by tap water.
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