2,892 research outputs found
Reptricket. Förord till Lars Gustafsson: Mot noll
No full textIntroduction to a collection of philosophical essays by Swedish author Lars Gustafsson (b. 1936)
Author Functions in Lars Kepler\u27s The Hypnotist: An Analysis
No full textThis paper examines Foucault\u27s notion of the author function as it pertains to Lars Kepler\u27s bestselling 2011 crime thriller, The Hypnotist. Lars Kepler is the pseudonym of a Swedish husband-wife writing duo, making him the perfect subject for analysis centering on illusory notion of the author. This paper will answer these questions: Who is the true author of The Hypnotist? What factors influence the author function of this bestelling novel? And what can The Hypnotist phenomenon tell us about the relationships between authors and their readers? This paper will demonstrate that no literary works may be ascribed to an individual person, and that authors hold no privileged knowledge of the works they produce, because authors cease to be authors the moment pen is lifted from page
Upscaling of a Cahn-Hilliard Navier-Stokes model with precipitation and dissolution in a thin strip
No full textWe consider a phase-field model for the incompressible flow of two immiscible fluids. This model extends widespread models for two fluid phases by including a third, solid phase, which can evolve due to e.g. precipitation and dissolution. We consider a simple, two-dimensional geometry of a thin strip, which can still be seen as the representation of a single pore throat in a porous medium. Under moderate assumptions on the Peclet number and the capillary number, we investigate the limit case when the ratio between the width and the length of the strip goes to zero. In this way, and employing transversal averaging, we derive an upscaled model. The result is a multi-scale model consisting of the upscaled equations for the total flux and the ion transport, while the phase-field equation has to be solved in cell problems at the pore scale to determine the position of interfaces. We also investigate the sharp-interface limit of the multi-scale model, in which the phase-field parameter approaches 0. The resulting sharp-interface model consists only of Darcy-scale equations, as the cell problems can be solved explicitly. Notably, we find asymptotic consistency, that is, the upscaling process and the sharp-interface limit commute. We use numerical results to investigate the validity of the upscaling when discontinuities are formed in the upscaled model.Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project Number 327154368 – SFB 1313
Research Foundation Flanders (FWO) – Project G0G1316N
Hasselt University – Project BOF19BL1
The phase field approach for reactive fluid-solid interfaces : modeling and homogenization
No full textThe overarching topic of this dissertation is multi-phase flow in
porous media. In the presence of salts and their ions, precipitation
and dissolution can alter the pore-space and have a great impact on
flow through porous media. Therefore, we need reliable models that
can describe these effects accurately both on the pore-scale and on
larger scales.
In this dissertation, we first propose several pore-scale models for
multi-phase flow including reactive fluid–solid interfaces. In these
models, both fluid–fluid and fluid–solid interfaces are resolved as
diffuse interfaces using the phase field method. We investigate the
thermodynamical consistency of the models and find their sharp
interface limit using asymptotic analysis.
We proceed to upscale the pore-scale models either using homogenization in a periodic porous medium or transversal averaging in the
simplified geometry of a thin strip. The results are multi-scale models consisting of averaged equations for flux and ion concentration,
with parameters that have to be determined through cell problems.
These cell problems encode information about the geometry of the
microscale at each macroscopic point.
Lastly, we apply the developed models to investigate enzymatically
induced calcite precipitation. We compare simulation results to
micro-fluidic experiments and find excellent agreement, in particular
for the growth direction of crystal aggregates.Das übergeordnete Thema dieser Dissertation ist die Mehrphasenströmung in porösen Medien. In Anwesenheit von Salzen und ihren
Ionen können Präzipitation und Auflösung den Porenraum verändern
und die Strömung durch poröse Medien stark beeinflussen. Daher benötigen wir zuverlässige Modelle, die diese Effekte sowohl auf der
Porenskala als auch auf größeren Skalen exakt beschreiben können.
In dieser Dissertation schlagen wir zunächst mehrere Modelle für
Mehrphasenströmungen einschließlich reaktiver Flüssig–FestkörperGrenzflächen auf der Porenskala vor. Dabei werden sowohl Flüssig–
Flüssig- als auch Flüssig–Festkörper-Grenzflächen mit Hilfe der Phasenfeldmethode als diffuse Grenzschicht aufgelöst. Wir untersuchen
die thermodynamische Konsistenz der Modelle und finden ihren
scharfen Grenzflächen-Limes mithilfe asymptotischer Analysis.
Wir betrachten den Skalenübergang der Porenskala-Modelle zur
Darcy-Skala durch Homogenisierung in einem periodischen porösen
Medium oder durch transversale Mittelung in der vereinfachten Geometrie eines dünnen Streifens. Das Ergebnis sind Multiskalenmodelle,
die aus gemittelten Gleichungen für Fluss und Ionenkonzentration
bestehen. Die Parameter dieser Gleichungen müssen duch Zellprobleme bestimmt werden, die die Geometrie der Mikroskala an jedem
makroskopischen Punkt beschreiben.
Abschließend wenden wir die entwickelten Modelle an, um enzymatisch induzierte Kalzitausfällung zu untersuchen. Wir vergleichen
die Simulationsergebnisse mit mikrofluidischen Experimenten und
stellen eine exzellente Übereinstimmung fest, insbesondere für die
Wachstumsrichtung der Kristallaggregate.This work was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project Number 327154368 – SFB 1313; the Research Foundation Flanders (FWO) – Project G0G1316N; and the Hasselt University – Project BOF19BL12
The phase field approach for reactive fluid-solid interfaces : modeling and homogenization
No full textThe overarching topic of this dissertation is multi-phase flow in
porous media. In the presence of salts and their ions, precipitation
and dissolution can alter the pore-space and have a great impact on
flow through porous media. Therefore, we need reliable models that
can describe these effects accurately both on the pore-scale and on
larger scales.
In this dissertation, we first propose several pore-scale models for
multi-phase flow including reactive fluid–solid interfaces. In these
models, both fluid–fluid and fluid–solid interfaces are resolved as
diffuse interfaces using the phase field method. We investigate the
thermodynamical consistency of the models and find their sharp
interface limit using asymptotic analysis.
We proceed to upscale the pore-scale models either using homogenization in a periodic porous medium or transversal averaging in the
simplified geometry of a thin strip. The results are multi-scale models consisting of averaged equations for flux and ion concentration,
with parameters that have to be determined through cell problems.
These cell problems encode information about the geometry of the
microscale at each macroscopic point.
Lastly, we apply the developed models to investigate enzymatically
induced calcite precipitation. We compare simulation results to
micro-fluidic experiments and find excellent agreement, in particular
for the growth direction of crystal aggregates.Das übergeordnete Thema dieser Dissertation ist die Mehrphasenströmung in porösen Medien. In Anwesenheit von Salzen und ihren
Ionen können Präzipitation und Auflösung den Porenraum verändern
und die Strömung durch poröse Medien stark beeinflussen. Daher benötigen wir zuverlässige Modelle, die diese Effekte sowohl auf der
Porenskala als auch auf größeren Skalen exakt beschreiben können.
In dieser Dissertation schlagen wir zunächst mehrere Modelle für
Mehrphasenströmungen einschließlich reaktiver Flüssig–FestkörperGrenzflächen auf der Porenskala vor. Dabei werden sowohl Flüssig–
Flüssig- als auch Flüssig–Festkörper-Grenzflächen mit Hilfe der Phasenfeldmethode als diffuse Grenzschicht aufgelöst. Wir untersuchen
die thermodynamische Konsistenz der Modelle und finden ihren
scharfen Grenzflächen-Limes mithilfe asymptotischer Analysis.
Wir betrachten den Skalenübergang der Porenskala-Modelle zur
Darcy-Skala durch Homogenisierung in einem periodischen porösen
Medium oder durch transversale Mittelung in der vereinfachten Geometrie eines dünnen Streifens. Das Ergebnis sind Multiskalenmodelle,
die aus gemittelten Gleichungen für Fluss und Ionenkonzentration
bestehen. Die Parameter dieser Gleichungen müssen duch Zellprobleme bestimmt werden, die die Geometrie der Mikroskala an jedem
makroskopischen Punkt beschreiben.
Abschließend wenden wir die entwickelten Modelle an, um enzymatisch induzierte Kalzitausfällung zu untersuchen. Wir vergleichen
die Simulationsergebnisse mit mikrofluidischen Experimenten und
stellen eine exzellente Übereinstimmung fest, insbesondere für die
Wachstumsrichtung der Kristallaggregate.This work was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project Number 327154368 – SFB 1313; the Research Foundation Flanders (FWO) – Project G0G1316N; and the Hasselt University – Project BOF19BL12
Stressreaktivität: theoretisches konzept und messung [Stress reactivity: theoretical concept and measurement]
No full textThe construct of stress reactivity refers to the disposition of a person to answer stressors with immediate, intense, and long lasting stress reactions. Stress reactivity is assumed to be determined by a disadvantageous pattern of four personality characteristics: high intrusiveness, low self-efficacy, high arousability of the central nervous system, and high negative affectivity. The Stress-Reactivity-Scale (SRS), which is presented in this article, does not only assess the general stress reactivity but also measures stress reactivity in different stressor domains. Item-test correlations and reliability coefficients as well as the test score distributions meet the test-statistical demands (N = 975). Concerning the validation of the SRS, findings regarding the factorial validity and correlations with other construct-related personality traits, bodily complaints, sleep behavior, chronic diseases, and cortisol reactions in a laboratory stress study are reported. Additionally, findings from a twin study on the influence of genetic factors on self-reported stress are reported, and finally sex differences are described. The results underline the validity of the SRS. The questionnaire is suitable for clinical research, to assess individual differences in stress reactivity, and as a tool to evaluate stress management programs
”Lärda nyheter” i Peter Hernquists korrespondens till Carl von Linné och Abraham Bäck - med kommentarer och utvikningar
No full textI detta Meddelande nr 55 från Veterinärhistoriska museet har författaren - professor emeritus Lars-Erik Appelgren - gjort ett urval av den korrespondens som Peter Hernquist hade med sina mentorer Carl von Linné och Abraham Bäck under sin vistelse i Frankrike, varvid ”Lärda nyheter” varit en ledstjärna för urvalet. Speciellt har breven till Bäck försetts med författarens personliga kommentarer men även kompletterats med faktaupplysningar från andra källor än breven om berörda nyheter. För att underlätta läsningen har dessa kommentarer omgetts med enkelkonturerad och utvikningarna med dubbelkonturerad ram. Lars-Erik Appelgren har inte bara genom sitt veterinärhistoriska författarskap utan också genom att ställa sina fackliga kunskaper och sin eminenta estetiska läggning till förfogande gjort Veterinärhistoriska museet ovärderliga tjänster. Det är med stor glädje jag noterar att region Uppsala nyligen visat sin uppskattning genom att tilldela Lars-Erik sitt Medicinhistoriska stipendium med motiveringen att de vill ”lyfta fram ett viktigt men ofta förbisett område inom medicinhistorien: veterinärmedicinen”. Med de varmaste gratulationer
Interpreting Wage Bargaining Norms
No full textFrom the mid-1990s onwards, Swedish wage bargaining has been characterised by informal co-ordination of the wage claims of big unions and bargaining cartels. In particular, it has been understood that the manufacturing sector should lead by first agreeing on a pay increase, whereafter the service sector and public sector unions choose a similar increase. We analyse his setup with two possible theoretical interpretations: (i) the manufacturing sector as a tackelberg leader and (ii) a normative role for the manufacturing sector’s pay increase, upported either by unmodelled social pressure or a modeled loss aversion (envy) of the heltered sector unions. The conclusion of the analysis is that the normative or leading role of one sector – in the Swedish case the manufacturing sector – can potentially bring big benefits for employment and output. Generalising an idea suggested by Lars Calmfors and Anna Larsson, our analysis also generates a rudimentary theory of why the wage increase norm sometimes binds and sometimes not. A comparison of the model predictions and the observed outcomes of the last five wage bargaining rounds in Sweden suggests that the model is generally consistent with the empirical observations: wage moderation and norm observance are stronger when the manufacturing industry’s initial relative wage is low.wage bargaining; bargaining co-ordination
Dan Andersson
No full textSpecial feature issue on the Swedish author Dan Andersson, with articles by Anders Hallengren, Nisse Munck, Lars Furuland, Lars Järnemo (2), Gösta Ågren, Inge Mattsson, Arne Säll, and Bure Holmbäck.</p
Representation of female characters in the films of Lars von Trier
No full textOslanjajući se na sličnosti u ženskim likovima Lars Von Triera, detektirani su patrijarhalni i religijski obrasci koji su okosnica radnje filmova Lomeći valove, Dogville i Antikrist. Kroz religijsku i patrijarhalnu optiku autor čita Lars Von Triera kao redatelja koji istu optiku kritizira i preispituje u svom stvaralaštvu.Relying on the similarities in Lars von Trier's female characters, patriarchal and religious patterns have been detected that are the backbone of the plot of the films Breaking the Waves, Dogville and the Antichrist. Through religious and patriarchal optics, the author reads Lars Von Trier as a director who criticizes and questions the same optics in his work
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