| 1. |
- Altskär, Annika, et al.
(author)
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Some effects of processing on the molecular structure and morphology of thermoplastic starch
- 2008
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In: Carbohydrate Polymers. - : Elsevier BV. - 0144-8617 .- 1879-1344. ; 71:4, s. 591-597
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Journal article (peer-reviewed)abstract
- Hydroxypropylated and oxidised potato starch (HONPS) was used together with glycerol and water to produce thermoplastic starch. The amount of glycerol was kept constant at 22 parts by weight per 100 parts of dry starch. The thermoplastic starch was converted into films/sheets using three different processing techniques; casting, compression moulding and film blowing. The last two methods represent typical thermoplastic conversion techniques requiring elevated processing temperatures. By means of size-exclusion chromatography, it was found that compression moulding and film blowing led to some degradation of high-molecular weight amylopectin as well as of high-molecular weight amylose-like molecules. The degradation was significantly less pronounced for the cast films. The morphology of the specimens was quite complex and phase separations on different levels were identified. In the cast films and, to a lesser extent, in the compression-moulded specimens, a fine network structure could be distinguished. Such a structure could however not be ascertained in the film-blown material and this is discussed in terms of the thermo-mechanical treatment of the starch materials. © 2007 Elsevier Ltd. All rights reserved.
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| 2. |
- Andersson, Karin M., 1989-, et al.
(author)
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Visual grading evaluation of commercially available metal artefact reduction techniques in hip prosthesis computed tomography
- 2016
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In: British Journal of Radiology. - London, United Kingdom : British Institute of Radiology. - 0007-1285 .- 1748-880X. ; 89:1063
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Journal article (peer-reviewed)abstract
- Objectives: To evaluate metal artefact reduction (MAR) techniques from four computed tomography (CT) vendors in hip prosthesis imaging.Methods: Bilateral hip prosthesis phantom images, obtained by using MAR algorithms for single energy CT data or dual energy CT (DECT) data and by monoenergetic reconstructions of DECT data, were visually graded by five radiologists using ten image quality criteria. Comparisons between the MAR images and a reference image were performed for each scanner separately. Ordinal probit regression analysis was used.Results: The MAR algorithms in general improved the image quality based on the majority of the criteria (up to between 8/10 and 10/10) with a statistically improvement in overall image quality (P<0.001). However, degradation of image quality, such as new artefacts, was seen in some cases. A few monoenergetic reconstruction series improved the image quality (P<0.004) for one of the DECT scanners, but it was only improved for some of the criteria (up to 5/10). Monoenergetic reconstructions resulted in worse image quality for the majority of the criteria (up to 7/10) for the other DECT scanner.Conclusions: The MAR algorithms improved the image quality of the hip prosthesis CT images. However, since additional artefacts and degradation of image quality were seen in some cases, all algorithms should be carefully evaluated for every clinical situation. Monoenergetic reconstructions were in general concluded to be insufficient for reducing metal artifacts. Advances in knowledge: Qualitative evaluation of the usefulness of several MAR techniques from different vendors in CT imaging of hip prosthesis.
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| 10. |
- Andersson, Henrik, et al.
(author)
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Ethics education to support ethical competence learning in healthcare : an integrative systematic review
- 2022
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In: BMC Medical Ethics. - : BioMed Central. - 1472-6939. ; 23
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Research review (peer-reviewed)abstract
- Background: Ethical problems in everyday healthcare work emerge for many reasons and constitute threats to ethi- cal values. If these threats are not managed appropriately, there is a risk that the patient may be inflicted with moral harm or injury, while healthcare professionals are at risk of feeling moral distress. Therefore, it is essential to support the learning and development of ethical competencies among healthcare professionals and students. The aim of this study was to explore the available literature regarding ethics education that promotes ethical competence learning for healthcare professionals and students undergoing training in healthcare professions.Methods: In this integrative systematic review, literature was searched within the PubMed, CINAHL, and PsycInfo databases using the search terms ‘health personnel’, ‘students’, ‘ethics’, ‘moral’, ‘simulation’, and ‘teaching’. In total, 40 arti- cles were selected for review. These articles included professionals from various healthcare professions and students who trained in these professions as subjects. The articles described participation in various forms of ethics education. Data were extracted and synthesised using thematic analysis.Results: The review identified the need for support to make ethical competence learning possible, which in the long run was considered to promote the ability to manage ethical problems. Ethical competence learning was found to be helpful to healthcare professionals and students in drawing attention to ethical problems that they were not previ- ously aware of. Dealing with ethical problems is primarily about reasoning about what is right and in the patient’s best interests, along with making decisions about what needs to be done in a specific situation.Conclusions: The review identified different designs and course content for ethics education to support ethical competence learning. The findings could be used to develop healthcare professionals’ and students’ readiness and capabilities to recognise as well as to respond appropriately to ethically problematic work situations.
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| 11. |
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| 12. |
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| 13. |
- Andersson, Mats, 1957, et al.
(author)
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A Dolbeault-Grothendieck lemma on complex spaces via Koppelman formulas
- 2012
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In: Inventiones Mathematicae. - : Springer Science and Business Media LLC. - 0020-9910 .- 1432-1297. ; 190:2, s. 261-297
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Journal article (peer-reviewed)abstract
- Let $X$ be a complex space of pure dimension. We introduce fine sheaves $\A^X_q$ of $(0,q)$-currents, which coincides with the sheaves of smooth forms on the regular part of $X$, so that the associated Dolbeault complex yields a resolution of the structure sheaf $\hol^X$. Our construction is based on intrinsic and quite explicit semi-global Koppelman formulas.
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| 14. |
- Andersson, Mats, 1957
(author)
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A generalized Poincare-Lelong formula
- 2007
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In: Mathematica Scandinavica. - 0025-5521 .- 1903-1807. ; 101:2, s. 195-218
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Journal article (peer-reviewed)abstract
- We prove a generalization of the classical Poincare-Lelong formula. Given a holomorphic section f, with zero set Z, of a Hermitian vector bundle E -> X, let S be the line bundle over X\Z spanned by f and let Q = E/S. Then the Chern form c(D-Q) is locally integrable and closed in X and there is a current W such that dd(c)W = c(D-E) - c(D-Q) - M, where M is a current with support on Z. In particular, the top Bott-Chern class is represented by a current with support on Z. We discuss positivity of these currents, and we also reveal a close relation with principal value and residue currents of Cauchy-Fantappie-Leray type.
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| 15. |
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| 16. |
- Andersson, Mats, 1957
(author)
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A global Briançon-Skoda-Huneke-Sznajdman theorem
- 2018
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In: Mathematica Scandinavica. - : Det Kgl. Bibliotek/Royal Danish Library. - 1903-1807 .- 0025-5521. ; 122:1, s. 31-52
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Journal article (peer-reviewed)abstract
- We prove a global effective membership result for polynomials on a non-reduced algebraic sub variety of C-N. It can be seen as a global version of a recent local result of Sznajdman. generalizine the Briancon-Skoda-Huneke theorem for the local ring of holomorphic functions at a point on a reduced analytic space.
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| 17. |
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| 18. |
- Andersson, Mats, 1957, et al.
(author)
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A note on smooth forms on analytic spaces
- 2021
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In: Mathematica Scandinavica. - : Det Kgl. Bibliotek/Royal Danish Library. - 0025-5521 .- 1903-1807. ; 127:3, s. 521-526
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Journal article (peer-reviewed)abstract
- We prove that any smooth mapping between reduced analytic spaces induces a natural pullback operation on smooth differential forms.
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| 19. |
- Andersson, Mats, 1957
(author)
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A pointwise norm on a non-reduced analytic space
- 2022
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In: Journal of Functional Analysis. - : Elsevier BV. - 0022-1236 .- 1096-0783. ; 283:4
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Journal article (peer-reviewed)abstract
- Let X be a possibly non-reduced space of pure dimension. We introduce a pointwise Hermitian norm on smooth (0, q)-forms, in particular on holomorphic functions, on X. The norm is canonical, up to equivalence, where the underlying reduced space is a manifold. We prove that the space of holomorphic functions is complete with respect to the natural topology induced by this norm. (C) 2022 Elsevier Inc. All rights reserved.
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| 20. |
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| 21. |
- Andersson, Mats, 1957
(author)
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A residue criterion for strong holomorphicity
- 2010
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In: Arkiv för matematik. - : International Press of Boston. - 0004-2080 .- 1871-2487. ; 48:1, s. 1-15
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Journal article (peer-reviewed)abstract
- We give a local criterion in terms of a residue current for strong holomorphicity of a meromorphic function on an arbitrary pure-dimensional analytic variety. This generalizes a result by A. Tsikh for the case of a reduced complete intersection.
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| 22. |
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| 24. |
- Andersson, Mats, 1957
(author)
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An explicit Koppelman formula for dd(c) and Green currents on p(n)
- 2011
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In: Mathematische Zeitschrift. - : Springer Science and Business Media LLC. - 0025-5874 .- 1432-1823. ; 267:3-4, s. 835-850
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Journal article (peer-reviewed)abstract
- We compute a quite explicit Koppelman formula for dd (c) on projective space, and obtain Green currents for closed (p, p)-currents.
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| 25. |
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| 26. |
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| 27. |
- Andersson, Mats, 1957
(author)
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Coleff-Herrera currents, duality, and Noetherian operators
- 2011
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In: Bulletin De La Societe Mathematique De France. - 0037-9484. ; 139:4, s. 535-554
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Journal article (peer-reviewed)abstract
- Let I be a coherent subsheaf of a locally free sheaf O(E-0) and suppose that I = O(E-0)/I has pure codimension. Starting with a residue current R obtained from a locally free resolution of I we construct a. vector-valued Coleff-Herrera current it with support on the variety associated to I such that phi is in I if and only if mu phi = 0. Such a current mu can also be derived algebraically from a fundamental theorem of Roos about the bidualizing functor, and the relation between these two approaches is discussed. By a construction due to Bjork one gets Noetherian operators for I from the current mu. The current R also provides an explicit realization of the Dickenstein-Sessa decomposition and other related canonical isomorphisms.
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| 28. |
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| 29. |
- Andersson, Mats, 1957
(author)
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Decomposition of residue currents
- 2009
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In: Journal für die reine und angewandte Mathematik (Crelles Journal). ; Online
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Journal article (peer-reviewed)
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| 30. |
- Andersson, Mats, 1957, et al.
(author)
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Direct images of semi-meromorphic currents
- 2014
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Other publication (other academic/artistic)abstract
- We introduce a calculus for direct images of semi-meromorphic currents. We also provide results on the behaviour of these currents under the action of holomorphic differential operators and interior multiplication by holomorphic vector fields.
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| 31. |
- Andersson, Mats, 1957, et al.
(author)
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Direct images of semi-meromorphic currents : Images directes de courants semi-méromorphes
- 2018
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In: Annales de l'Institut Fourier. - : Cellule MathDoc/CEDRAM. - 0373-0956 .- 1777-5310. ; 68:2, s. 875-900
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Journal article (peer-reviewed)abstract
- We introduce a calculus for the class $ASM(X)$ of direct images of semi-meromorphic currents on a reduded analytic space $X$, that extends the classical calculus due to Coleff, Herrera and Passare. Our main result is that each element in this class acts as a kind of multiplication on the sheaf $\mathcal{PM}_X$ of pseudomeromorphic currents on $X$. We also prove that $ASM(X)$ as well as $\mathcal{PM}_X$ and certain subsheaves are closed under the action of holomorphic differential operators and interior multiplication by holomorphic vector fields.
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| 32. |
- Andersson, Mats, 1957, et al.
(author)
-
Direct images of semi-meromorphic currents
- 2018
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In: Annales de lInstitut Fourier. - : Cellule MathDoc/CEDRAM. - 0373-0956 .- 1777-5310. ; 68:2, s. 875-890
-
Journal article (peer-reviewed)abstract
- We introduce a calculus for the class ASM(X) of direct images of semi-meromorphic currents on a reduded analytic space X, that extends the classical calculus due to Coleff, Herrera and Passare. Our main result is that each element in this class acts as a kind of multiplication on the sheaf PMX of pseudomeromorphic currents on X. We also prove that ASM(X) as well as PMX and certain subsheaves are closed under the action of holomorphic differential operators and interior multiplication by holomorphic vector fields.
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| 33. |
- Andersson, Mats, 1957, et al.
(author)
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Division formulas on projective varieties
- 2016
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In: Mathematische Zeitschrift. - : Springer Science and Business Media LLC. - 0025-5874 .- 1432-1823. ; 284:1, s. 575-593
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Journal article (peer-reviewed)abstract
- We introduce a division formula on a possibly singular projective subvariety X of complex projective space PN, which, e.g., provides explicit representations of solutions to various polynomial division problems on the affine part of X. Especially we consider a global effective version of the Briançon–Skoda–Huneke theorem. The first author was partially supported by the Swedish Research Council. The second author was supported by a postdoc grant from the Swedish Research Council.
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| 34. |
- Andersson, Mats, 1957, et al.
(author)
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Estimates for the ∂¯ -Equation on Canonical Surfaces
- 2020
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In: Journal of Geometric Analysis. - : Springer Science and Business Media LLC. - 1050-6926 .- 1559-002X. ; 30:3, s. 2974-3001
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Journal article (peer-reviewed)abstract
- We study the solvability in Lp of the ∂¯ -equation in a neighborhood of a canonical singularity on a complex surface, a so-called du Val singularity. We get a quite complete picture in case p= 2 for two natural closed extensions ∂¯ s and ∂¯ w of ∂¯. For ∂¯ s we have solvability, whereas for ∂¯ w there is solvability if and only if a certain boundary condition (∗) is fulfilled at the singularity. Our main tool is certain integral operators for solving ∂¯ introduced by the first and fourth author, and we study mapping properties of these operators at the singularity.
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| 35. |
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| 36. |
- Andersson, Mats, 1957, et al.
(author)
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Explicit representation of membership of polynomial ideals
- 2011
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In: Mathematische Annalen. - : Springer Science and Business Media LLC. - 0025-5831 .- 1432-1807. ; 349:2, s. 345-365
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Journal article (peer-reviewed)abstract
- We introduce a new division formula on projective space which provides explicit solutions to various polynomial division problems with sharp degree estimates. We consider simple examples as the classical Macaulay theorem as well as a quite recent result by Hickel, related to the effective Nullstellensatz. We also obtain a related result that generalizes Max Noether's classical AF + BG theorem.
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| 37. |
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| 38. |
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| 39. |
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| 40. |
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| 41. |
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| 42. |
- Andersson, Mats, 1957, et al.
(author)
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Global effective versions of the Briancon-Skoda-Huneke theorem
- 2015
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In: Inventiones Mathematicae. - : Springer Science and Business Media LLC. - 0020-9910 .- 1432-1297. ; 200:2, s. 607-651
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Journal article (peer-reviewed)abstract
- We prove global effective versions of the Briançon–Skoda–Huneke theorem. Our results extend, to singular varieties, a result of Hickel on the membership problem in polynomial ideals in Cn, and a related theorem of Ein and Lazarsfeld for smooth projective varieties. The proofs rely on known geometric estimates and new results on multivariable residue calculus.
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| 43. |
- Andersson, Mats, 1957
(author)
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Global Koppelman Formulas on (Singular) Projective Varieties
- 2019
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In: Journal of Geometric Analysis. - : Springer Science and Business Media LLC. - 1050-6926 .- 1559-002X. ; 29:3, s. 2290-2317
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Journal article (peer-reviewed)abstract
- Let i: X→ PN be a projective manifold of dimension n embedded in projective space PN, and let L be the pullback to X of the line bundle OPN(1). We construct global explicit Koppelman formulas on X for smooth (0 , ∗) -forms with values in Ls for any s. The same construction works for singular, even non-reduced, X of pure dimension, if the sheaves of smooth forms are replaced by suitable sheaves AX∗ of (0 , ∗) -currents with mild singularities at Xsing. In particular, if s≥regX-1, where regX is the Castelnuovo–Mumford regularity, we get an explicit representation of the well-known vanishing of H,q(X, Ls-q) , q≥ 1. Also some other applications are indicated.
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| 44. |
- Andersson, Mats, 1957, et al.
(author)
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Global representation of Segre numbers by Monge–Ampère products
- 2021
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In: Mathematische Annalen. - : Springer Science and Business Media LLC. - 0025-5831 .- 1432-1807. ; 380:1-2, s. 349-391
-
Journal article (peer-reviewed)abstract
- On a reduced analytic space X we introduce the concept of a generalized cycle, which extends the notion of a formal sum of analytic subspaces to include also a form part. We then consider a suitable equivalence relation and corresponding quotient B(X) that we think of as an analogue of the Chow group and a refinement of de Rham cohomology. This group allows us to study both global and local intersection theoretic properties. We provide many B-analogues of classical intersection theoretic constructions: For an analytic subspace V⊂ X we define a B-Segre class, which is an element of B(X) with support in V. It satisfies a global King formula and, in particular, its multiplicities at each point coincide with the Segre numbers of V. When V is cut out by a section of a vector bundle we interpret this class as a Monge–Ampère-type product. For regular embeddings we construct a B-analogue of the Gysin morphism.
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| 45. |
- Andersson, Mats, 1957, et al.
(author)
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Green functions, Segre numbers, and King’s formula
- 2014
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In: Annales de lInstitut Fourier. - : Cellule MathDoc/CEDRAM. - 0373-0956 .- 1777-5310. ; 64:6, s. 2639-2657
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Journal article (peer-reviewed)abstract
- Let ? be a coherent ideal sheaf on a complex manifold X with zero set Z, and let G be a plurisubharmonic function such that G=log|f|+?(1) locally at Z, where f is a tuple of holomorphic functions that defines ?. We give a meaning to the Monge-Ampère products (dd c G) k for k=0,1,2,..., and prove that the Lelong numbers of the currents M k ? :=1 Z (dd c G) k at x coincide with the so-called Segre numbers of J at x, introduced independently by Tworzewski, Gaffney-Gassler, and Achilles-Manaresi. More generally, we show that M k ? satisfy a certain generalization of the classical King formula.
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