| 1. |
- Ek, Sverker R, 1930-, et al.
(författare)
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Hjalmar Bergman : korrespondenser 1900-1930
- 2012
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Annan publikation (populärvet., debatt m.m.)abstract
- Hjalmar Bergman (19/9 1883-1/1 1931) är en framträdande och särpräglad författarprofil i svensk litteratur under förra hälften av 1900-talet. Hans rika produktion omfattar inte bara romaner, noveller och dramer utan även sagor, filmmanuskript, radiopjäser och översättningar. Bergman var också en tämligen flitig brevskrivare. Hans korrespondens finns till stora delar bevarad på olika arkiv och bibliotek i in- och utlandet. Här har publicerats enbart breven till vänner och samtida kulturpersonligheter (se nedan). De presenteras digitalt som en samlad textcorpus. Samtliga brevformer som vykort, telegram, visitkort har medtagits. I de fall där originalbreven saknar angivelser av avsändningsort och/eller datum har dessa uppgifter tentativt kompletterats inom klammer.Publiceringen syftar till att vara en digital forskningsresurs där breven kan lokaliseras på flertal olika sätt. Dessutom sätts brev i kontext då man enkelt kan se vilka verk, personer m.m. som förekommer i varje brev.För att orientera sig i materialet finns ett antal ingångar:Utforska breven utifrån adressaterUtforska breven utifrån vilka personer som förekommer i brevenUtforska utifrån vilkav erk som är omnämnda i brevenUtforska utifrån breven utifrån verkens genrer
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| 2. |
- Abdallah, J, et al.
(författare)
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Rapidity-alignment and p(T) compensation of particle pairs in hadronic Z(0) decays
- 2002
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Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 533:3-4, s. 243-252
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Tidskriftsartikel (refereegranskat)abstract
- Observation is made of rapidity-alignment of K+K- and (p) over barp pairs which results from their asymmetric orientation in rapidity, with respect to the direction from primary quark to antiquark. The K+K- and (p) over barp data are consistent with predictions from the fragmentation string model. However, the (p) over barp data strongly disagree with the conventional implementation of the cluster model. The non-perturbative process of 'gluon splitting to diquarks' has to be incorporated into the cluster model for it to agree with the data. Local conservation of PT between particles nearby in rapidity (i.e., p(T) compensation) is analysed with respect to the thrust direction for pi(+)pi(-), K+K-, and (p) over barp pairs. In this case, the string model provides fair agreement with the data. The cluster model is incompatible with the data for all three particle pairs. The model with its central premiss of isotropically-decaying clusters predicts a p(T) correlation not seen in the data. (C) 2002 Elsevier Science B.V. All rights reserved.
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| 3. |
- Abdallah, J, et al.
(författare)
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Search for charged Higgs bosons in e(+)e(-) collisions root s=189-202 GeV
- 2002
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Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 525:1-2, s. 17-28
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Tidskriftsartikel (refereegranskat)abstract
- A search for pair-produced charged Higgs bosons was performed in the high energy data collected by the DELPHI detector at LEP II at centre-of-mass energies from 189 GeV to 202 GeV. The three different final states, taunutaunu, c (s) over bar(c) over bars and c (s) over bar taunu were considered. New methods were applied to reject wrong hadronic jet pairings and for the tau identification, where a discriminator based on tau polarisation and polar angles was used. No excess of data compared to the expected Standard Model processes was observed and the existence of a charged Higgs boson with mass lower than 71.5 GeV/c(2) is excluded at the 95% confidence level. (C) 2002 Published by Elsevier Science B.V.
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| 4. |
- Abdallah, J, et al.
(författare)
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Searches for neutral Higgs bosons in e(+)e(-), collisions from root s=191.6 to 201.7 GeV
- 2002
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Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 23:3, s. 409-435
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Tidskriftsartikel (refereegranskat)abstract
- Neutral Higgs bosons of the Standard Model (SM) and the Minimal Supersymmetric Standard Model (MSSM) were searched for in the data collected in 1999 by the DELPHI experiment at centre-of-mass energies between 191.6 and 201.7 GeV with a total integrated luminosity of 228 pb(-1). These analyses, in combination with our results at lower energies, set 95% confidence level lower mass bounds on the Standard Model Higgs boson (107.3 GeV/c(2)) and on the lightest neutral scalar (85.9 GeV/c(2)) and neutral pseudoscalar (86.5 GeV/c(2)) Higgs bosons in representative scans of the MSSM parameter space. An extended scan of the MSSM parameter space was also performed to test the robustness of these limits.
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| 5. |
- Abdallah, J, et al.
(författare)
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Study of inclusive J/psi production in two-photon collisions at LEP II with the DELPHI detector
- 2003
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Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 565:1-4, s. 76-86
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Tidskriftsartikel (refereegranskat)abstract
- Inclusive J/psi production in photon-photon collisions has been observed at LEP II beam energies. A clear signal from the reaction gammagamma --> J/psi + X is seen. The number of observed N(J/psi --> mu(+)mu(-)) events is 36+/-7 for an integrated luminosity of 617 pb(-1), yielding a cross-section of sigma(J/psi + X) = 45+/-9(stat) +/- 17(syst) pb. Based on a study of the event shapes of different types of gammagamma processes in the PYTHIA program, we conclude that (74+/-22) % of the observed J/psi events are due to 'resolved' photons, the dominant contribution of which is most probably due to the gluon content of the photon. (C) 2003 Published by Elsevier B.V.
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| 6. |
- Abreu, P, et al.
(författare)
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b-tagging in DELPHI at LEP
- 2004
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Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 32:2, s. 185-208
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Tidskriftsartikel (refereegranskat)abstract
- The standard method used for tagging b-hadrons in the DELPHI experiment at the CERN LEP Collider is discussed in detail. The main ingredient of b-tagging is the impact parameters of tracks, which relies mostly on the vertex detector. Additional information, such as the mass of particles associated to a secondary vertex, significantly improves the selection efficiency and the background suppression. The paper describes various discriminating variables used for the tagging and the procedure of their combination. In addition, applications of b-tagging to some physics analyses, which depend crucially on the performance and reliability of b-tagging, are described briefly.
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| 7. |
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| 8. |
- Ek, Sverker
(författare)
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Fetal hematopoietic cells in early gestation : aspects in view of fetal transplantation
- 1995
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The fetus as a patient is a challenge. There are opportunities for early, sometimes life-saving procedures or there may be advantages in prenatal rather than postnatal intervention. This is the case in fetal hematopoietic cell (FHC) transplantation where conditions caused by a defect in blood cell formation may be life-threatening to the fetus. In other diseases the dysfunction may be slower. Nonetheless, an early treatment may improve prognosis. The aim of the studies on which this thesis is based was to lay the foundation of a program for human fetus-to-fetus transplantation with FHC. As the logistics of such transplantation demand a tissue bank of cells from elective abortions, the following items were studied: methods for retrieval of fetal cells, cryopreservation of FHC, deterrnination of immunological capacity, and different modalities for improving hematological capacity. In addition, the safety of FHC with regard to bacterial contamination, virus infection and cytogenetic abnormality was evaluated. Finally, different routes for the administration of FHC to human fetuses were compared. FHC from the fetal liver (FL) were analyzed with conventional immunological techniques. Monoclonal antibodies were used, and it was found that common surface antigens were present on FL cells, but to a lesser extent than in bone marrow (BM). As compared to BM, FHC from FL were found to manifest more Ms positive cells (monocytes/macrophages) and the same amount of CD34 positive (stemlearly progenitor) cells. The number of CD34+ cells did not change after cryopreservation, nor was cellular function altered, as measured by colony formation. We studied the immunological capacity of FHC before the 12th week, as those are the cells that will be used for transplantation. This was done in various assays: mitogen stimulation, polyclonal B-cells activation (PBA), mixed Iymphocyte culture (MLC), HLA surface markers, HLA-typing with anti-sera and genomic HLA determination. Nowhere was any significant immunological activity found, although it was possible to demonstrate that FHC did activate adult peripheral blood leukocytes (PBL) in MLC, but not the opposite. Genomic HLA determination was possible, which was expected. Engraftment of transplanted cells may be enhanced. As the recipient is a developing fetus, manipulations are restricted to the graft. Different methods, namely cytokine stimulation and CD34+ enrichment of FHC, were studied. The effects of these manipulations were evaluated in terms of colony formation (BFU-E, CFU-GM and -GEMM). It was possible to demonstrate effects of each single cytokine, and of cytokines used simultaneously. CD34+ purification was also beneficial for cellular expansion, and a combination of cytokines and purification seemed to be most advantageous for colony formation. However, crude cells may be used in transplantation instead of CD34+ FHC, as the CD34 negative FHC also could form colonies. All FHC retrieved after elective abortions were screened for bacterial contamination, virus infection and chromosomal abnormality. With these screening precautions as routine procedure, the use of FHC from elective abortions seems safe and practicable. The administration of cells to fetuses in utero is possible with an ultrasound-guided technique. Theintravascular(iv) and the intraperitoneal (ip) routes in fetuses at 13-17 weeks of gestation were compared. Of the two the iv route yielded significantly higher cell dose of radiolabeled FHC in hematopoiesis-associated organs, such as liver, spleen and thymus, in the recipient fetuses. There was a higher level of activity after injection of FHC than after injection of maternal plasma, suggesting an active homing of FHC in these organs.
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| 9. |
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| 10. |
- Ek, Sverker
(författare)
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Kellgren och Leopold under 1789 års riksdag
- 1947
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Ingår i: Samlaren. - Uppsala : Svenska Litteratursällskapet. - 0348-6133 .- 2002-3871. ; N.F. 28, s. 1-16
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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