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Sökning: WFRF:(Schaumann M.)

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1.
  • Edgecock, T. R., et al. (författare)
  • High intensity neutrino oscillation facilities in Europe
  • 2013
  • Ingår i: Physical Review Special Topics - Accelerators and Beams. - : American Physical Society. - 1098-4402. ; 16:2, s. 021002-
  • Tidskriftsartikel (refereegranskat)abstract
    • The EUROnu project has studied three possible options for future, high intensity neutrino oscillation facilities in Europe. The first is a Super Beam, in which the neutrinos come from the decay of pions created by bombarding targets with a 4 MW proton beam from the CERN High Power Superconducting Proton Linac. The far detector for this facility is the 500 kt MEMPHYS water Cherenkov, located in the Frejus tunnel. The second facility is the Neutrino Factory, in which the neutrinos come from the decay of mu(+) and mu(-) beams in a storage ring. The far detector in this case is a 100 kt magnetized iron neutrino detector at a baseline of 2000 km. The third option is a Beta Beam, in which the neutrinos come from the decay of beta emitting isotopes, in particular He-6 and Ne-18, also stored in a ring. The far detector is also the MEMPHYS detector in the Frejus tunnel. EUROnu has undertaken conceptual designs of these facilities and studied the performance of the detectors. Based on this, it has determined the physics reach of each facility, in particular for the measurement of CP violation in the lepton sector, and estimated the cost of construction. These have demonstrated that the best facility to build is the Neutrino Factory. However, if a powerful proton driver is constructed for another purpose or if the MEMPHYS detector is built for astroparticle physics, the Super Beam also becomes very attractive.
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2.
  • Schaumann, N., et al. (författare)
  • Lobular neoplasia and invasive lobular breast cancer: Inter-observer agreement for histological grading and subclassification
  • 2019
  • Ingår i: Pathology Research and Practice. - : Elsevier BV. - 0344-0338. ; 215:11
  • Tidskriftsartikel (refereegranskat)abstract
    • Lobular neoplasia (LN), invasive lobular breast cancer (ILBC) and related pleomorphic variants represent a distinct group of neoplastic mammary gland lesions. This study assessed the inter-observer agreement of histological grading in a series of ILBC and LN. 54 cases (36x ILBC, 18x LN) were evaluated by 17 observers. 3978 classification calls on various histological features, including nuclear grade, proliferative activity (Ki67 immunohistochemistry, categorical scoring), histological grade and pleomorphism were obtained. Pairwise Cohen's kappa values were calculated and compared between various features and different observer subsets with variable histomorphological experience. In ILBC, pairwise inter-observer agreement for histological grade ranged from poor to almost perfect concordance and was higher in advanced and experienced histopathologists compared with beginners (P < 0.001). Agreement for proliferation (Ki67) ranged from slight to almost perfect concordance and was also higher in advanced and experienced histopathologists (P < 0.001). Considering different features, agreement for proliferation (Ki67) was superior to agreement for histological grade and nuclear grade, even among advanced and experienced histopathologists (P < 0.001). In LN, agreement for B-classification ranged from poor to almost perfect concordance and was higher in advanced and experienced histopathologists (P < 0.001). Considering different features, agreement for proliferation (Ki67 in LN) was superior to subclassification agreement based on conventional features, such as acinar distention and nuclear grade (P < 0.001). In summary, pairwise inter-observer concordance of histological grading of ILBC and LN is dependent on histomorphological experience. Assessment of proliferation by Ki67 immunohistochemistry is associated with favorable inter-observer agreement and can improve histological grading of ILBC as well as LN. © 2019 Elsevier GmbH
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3.
  • Reuten, Raphael, et al. (författare)
  • Basement membrane stiffness determines metastases formation
  • 2021
  • Ingår i: Nature Materials. - : Springer Science and Business Media LLC. - 1476-4660 .- 1476-1122.
  • Tidskriftsartikel (refereegranskat)abstract
    • The basement membrane (BM) is a special type of extracellular matrix and presents the major barrier cancer cells have to overcome multiple times to form metastases. Here we show that BM stiffness is a major determinant of metastases formation in several tissues and identify netrin-4 (Net4) as a key regulator of BM stiffness. Mechanistically, our biophysical and functional analyses in combination with mathematical simulations show that Net4 softens the mechanical properties of native BMs by opening laminin node complexes, decreasing cancer cell potential to transmigrate this barrier despite creating bigger pores. Our results therefore reveal that BM stiffness is dominant over pore size, and that the mechanical properties of ‘normal’ BMs determine metastases formation and patient survival independent of cancer-mediated alterations. Thus, identifying individual Net4 protein levels within native BMs in major metastatic organs may have the potential to define patient survival even before tumour formation. The ratio of Net4 to laminin molecules determines BM stiffness, such that the more Net4, the softer the BM, thereby decreasing cancer cell invasion activity.
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4.
  • Schaumann, Janina M., et al. (författare)
  • Market shaping MNCs in emerging markets - stakeholder engagement and the role of embeddedness
  • 2023
  • Ingår i: Industrial Marketing Management. - 0019-8501. ; 114, s. 64-79
  • Tidskriftsartikel (refereegranskat)abstract
    • This study delves into the phenomenon of collective market shaping in the context of multinational corporations (MNCs) in emerging markets. The study examines the firm's engagement activities and the importance of embeddedness in market shaping undeveloped in the literature. Theoretically this study builds on the literature on collective market shaping, stakeholder engagement and stakeholder embeddedness. Based on a secondary data analysis of two in-depth case studies of MNCs in Brazil, India, and China, we have identified four roles of stakeholders reflecting their engagement and embeddedness: missionaries, catalysts, diffusers, and grassroot movers. Our findings show a recursive process involving stakeholders' structural embeddedness, relational embeddedness and their roles in market shaping. By impacting these dynamics via engagement activities, the MNC can deepen the firm's own embeddedness in the local market and facilitate market shaping. We conclude with introducing ‘embedded market shaping’ as a mode of collective market shaping. It describes the gradual embedding of the firm into a local market through a recursive process, which involves stakeholders who are aware of the MNC's market shaping vision and interested in its pursuit, as well as unaware stakeholders who unintentionally support the MNC's vision.
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