I dagens digitaliserade värld använder 4,45 miljarder sociala medier. Utav dessa befinner sig 120 miljoner registrerade användare på plattformen OnlyFans. Under coronapandemin växte plattformen explosionsartat vilket ledde till en spridning av information om OnlyFans i populärkultur och i media. Vårt syfte med denna kandidatuppsats är att studera informationsspridningen av OnlyFans via sociala medier. Utifrån denna kunskap vill vidare belysa hur unga kvinnors uppfattning om plattformen påverkas av denna sorts spridning av information. Baserat på teorierna weak ties och eWOM (elektronisk word-of-mouth) har vi tagit fram tre indikatorer för att skapa förståelse om unga kvinnors attityd gentemot OnlyFans. Dessa är attityd, övertygelse och trovärdighet.  Information om OnlyFans sprids främst via sociala medier, inte minst av influencers. Med en feministisk ansats har vi med en metodkombination utav kvalitativa intervjuer och en kvantitativ enkät tagit del av unga kvinnors tankar och åsikter om plattformen. Resultatet visar en negativ attityd av den övervägande majoriteten av respondenterna. Med en redan negativ attityd visar respondenterna en svag övertygelse och trovärdighet mot plattformen och dess kreatörer. En intervju med en kreatör från plattformen har visat oss en glimt av OnlyFans som arbetsgivare. Slutligen, baserat på resultaten och analysen, har slutsatsen dragits att respondenterna har en negativ attityd, trovärdighet och övertygelse gentemot plattformen. Detta påverkar inte deras syn på kvinnan som kreatör utan mot den betalande mannen bakom skärmen.

In this thesis I discuss the nature of ‘measurement’ in quantum theory. ‘Measurement’ is associated with several different processes: the gradual imprinting of information about one system onto another, which is well understood; the collapse of the wavefunction, which is ill-defined and troublesome; and finally, the means by which inferences about unknown experimental parameters are made. I present a theoretical extension to an experimental proposal from Leggett and Garg, who suggested that the quantum-or-classical reality of a macroscopic system may be probed with successive measurements arrayed in time. The extension allows for a finite level of imperfection in the protocol, and makes use of Leggett’s ‘null result’ measurement scheme. I present the results of an experiment conducted in Oxford that, up to certain loopholes, defies a non-quantum interpretation of the dynamics of phosphorous nuclei embedded in silicon. I also present the theory of statistical parameter estimation, and discover that a recent trend to employ time symmetric ‘postselected’ measurements offers no true advantage over standard methods. The technique, known as weak-value amplification, combines a weak transfer of quantum information from system to meter with conditional data rejection, to surprising effect. The Fisher information is a powerful tool for evaluating the performance of any parameter estimation model, and it reveals the technique to be worse than ordinary, preselected only measurements. That this is true despite the presence of noise (including magnetic field fluctuations causing deco- herence, poor resolution detection, and random displacements), casts serious doubt on the utility of the method.

Using interpolation methods, new results on the boundedness of quasilinear joint weak type operators on Lorentz-Karamata (LK) spaces are established. LK spaces generalize many function spaces introduced before in literature, for example, the generalized Lorentz- Zygmund spaces, the Zygmund spaces, the Lorentz spaces and, of course, the Lebesgue spaces. The focus is mainly on the limiting cases of interpolation, where the spaces involved are, in certain sense, very close to the endpoint spaces. The results contain both necessary and sufficient conditions for the boundedness of the given operator on LK spaces. The complete characterization of embeddings of LK spaces is also included and the optimality of achieved results is then discussed. Finally, we apply our results to the conjugate function operator, which is known to be bounded on $L_p$ only if $1<p<\infty.$ Powered by TCPDF (www.tcpdf.org)

In der Hefe Yarrowia lipolytica führen Mutationen im GPR1-Gen zu Essigsäuresensitivität. Die Deletion dieses Genes hat demgegenüber keinen Effekt auf den Phänotyp. In dieser Arbeit wurde das Gpr1-Protein näher charakterisiert. Es zeigte sich, dass GPR1-Mutantenstämme wesentlich schneller Acetat akkumulierten als der Wildtyp. Außerdem konnte bestetigt werden, dass Gpr1p ein integrales Membranprotein ist. Mittels Ortspezifischer Analyse wurden verschiedene funktionelle Bereiche untersucht. Das Protein unterliegt zudem einer Phosphorylierung/Dephosphorylierung. Auf der Grundlage der dargelegten Ergebnisse wurde ein Funktionsmodell für Gpr1p erstellt.

Hållbarhet är ett begrepp som har skiftande innebörd, både inom vetenskap och populärvetenskap. Forskning kring hållbarhet har ett särskilt fokus på kartläggning av orsakssamband och enbart ett fåtal studier fokuserar på att kartlägga och utforska hur begreppet hållbarhet konstrueras genom företags kommunikation. Inom redovisning efterfrågas ofta ett mer principbaserat och konceptuellt angreppssätt, och då detta enligt vår litteraturöversikt ges begränsat utrymme inom forskning kring hållbarhet, finns det möjligheter till att bidra med förståelse på området. Syftet med denna studie är att utforska hur begreppet hållbarhet kommuniceras och därmed konstrueras av företag med affärskonceptet fast fashion. Det finns en distinktion mellan handling och kommunikation och den här studien behandlar enbart kommunikationsaspekten. Vi har genomfört en kvalitativ innehållsanalys av hållbarhetsredovisningar för företag med affärskonceptet fast fashion. Studien har en tvärsnittsdesign med ett teoretiskt urval och top of mind-associationer. Totalt inkluderades tre företag i studien och deras respektive hållbarhetsredovisningar för rapporteringsåret 2013. I analysen har vi arbetat utifrån en abduktiv ansats inspirerat av ett foucauldianskt perspektiv. Den teoretiska modellen utvecklades med hjälp av tidigare litteratur om hållbarhetsdefinitioner och användes som en utgångspunkt för att kategorisera de textavsnitt som identifierades i respektive analys. Vår utforskning av företagens kommunikation av hållbarhet leder till slutsatsen att begreppet snarare konstrueras som produktiv aktivitet än handlingsklokhet i och med företagens tydliga fokus på stegvis anpassning och efterlevnad av såväl koder som specifika regler. Weak sustainability är mer framträdande än strong sustainability i företagens hållbarhetsrapportering, men det finns även en glidande skala mellan dessa. Till skillnad från övriga studier kring konstruktion av hållbarhetsbegreppet riktar denna studie in sig på företag med ett visst koncept (i.e. fast fashion) i utforskningen av hur hållbarhetsbegreppet kommuniceras och konstrueras. Studiens bidrag är utvecklandet av den teoretiska modellen i form av en glidande skala samt ökad konceptuell förståelse för konstruktion av hållbarhet. Vi argumenterar således för en glidande skala mellan de teoretiskt definierade hållbarhetskategorierna, medan andra studier enbart presenterar sina resultat enligt dikotomier. / Considering both science and popular science, sustainability is a concept of diverse meanings. Scientific research concerning sustainability has a particular focus on plotting causal links. Only a few studies focus on plotting and exploring the concept of sustainability as it is being conveyed by businesses via communication in corporate sustainability reports. Within the accounting field, there is a common demand for a principles-based and conceptual approach. Thus, while our literature review shows scientific research on sustainability has given limited attention to this approach, there are vast opportunities to contribute to this field by enhancing the comprehension of this issue. Consequently, the aim of this study is to explore the way in which the concept of sustainability is communicated and hence constructed by fast fashion businesses. As there is a distinction between practice and communication, this study merely focuses on the communication aspect.We have conducted a qualitative content analysis based on corporate sustainability reports issued by fast fashion corporations. The study applies a cross-sectional design and a theoretical sampling technique coupled with top-of-mind associations. In total, three corporations were included in this study, resulting in a sample of three corporate sustainability reports from the reporting year of 2013. During the analysis, an abductive approach inspired by a foucauldian perspective was applied. The theoretical model was elaborated on the basis of previous research and academic literature on the definition of sustainability and it served as an initial structure for categorization of the empirical observations.Our findings indicate that companies portray a clear focus on gradual adjustment and conformity to various codes as well as regulations, which leads to the conclusion that companies included in this study construct sustainability in terms of skills rather than wisdom. Furthermore, our findings point to the conclusion that elements of weak sustainability are more prominent than elements of strong sustainability in corporate sustainability reports. However, a notable finding is the existence of a sliding scale between these paradigms. As opposed to other studies regarding the construction of sustainability, this study focuses on a certain business concept (i.e. fast fashion) exploring the communication and construction of the concept sustainability. The contribution of our study is an evolution of the model in terms of a sliding scale and increased conceptual understanding of the term sustainability. We argue a sliding scale between weak and strong sustainability should be taken into account, while previous studies have presented their findings solely as dichotomies.This paper is written in Swedish.

The use of Hilbert space theory became an important tool for ergodic theoreticians ever since John von Neumann proved the fundamental Mean Ergodic theorem in Hilbert space. Recurrence is one of the corner stones in the study of dynamical systems. In this dissertation some extended ideas besides those of the basic, well-known recurrence results are investigated. Hilbert space theory proves to be a very useful approach towards the solution of multiple recurrence problems in ergodic theory. Another very important use of Hilbert space theory became evident only relatively recently, when it was realized that non-commutative dynamical systems become accessible to the ergodic theorist through the important Gelfand-Naimark-Segal (GNS) representation of C*-algebras as Hilbert spaces. Through this construction we are enabled to invoke the rich catalogue of Hilbert space ergodic results to approach the more general, and usually more involved, non-commutative extensions of classical ergodic-theoretical results. In order to make this text self-contained, the basic, standard, ergodic-theoretical results are included in this text. In many instances Hilbert space counterparts of these basic results are also stated and proved. Chapters 1 and 2 are devoted to the introduction of these basic ergodic-theoretical results such as an introduction to the idea of measure-theoretic dynamical systems, citing some basic examples, Poincairé’s recurrence, the ergodic theorems of Von Neumann and Birkhoff, ergodicity, mixing and weakly mixing. In Chapter 2 several rudimentary results, which are the basic tools used in proofs, are also given. In Chapter 3 we show how a Hilbert space result, i.e. a variant of a result by Van der Corput for uniformly distributed sequences modulo 1, is used to simplify the proofs of some multiple recurrence problems. First we use it to simplify and clarify the proof of a multiple recurrence result by Furstenberg, and also to extend that result to a more general case, using the same Van der Corput lemma. This may be considered the main result of this thesis, since it supplies an original proof of this result. The Van der Corput lemma helps to simplify many of the tedious terms that are found in Furstenberg’s proof. In Chapter 4 we list and discuss a few important results where classical (commutative) ergodic results were extended to the non-commutative case. As stated before, these extensions are mainly due to the accessibility of Hilbert space theory through the GNS construction. The main result in this section is a result proved by Niculescu, Ströh and Zsidó, which is proved here using a similar Van der Corput lemma as in the commutative case. Although we prove a special case of the theorem by Niculescu, Ströh and Zsidó, the same method (Van der Corput) can be used to prove the generalized result. Copyright 2004, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. Please cite as follows: Beters, FJC 2004, A Hilbert space approach to multiple recurrence in ergodic theory, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-02222006-104936 / > / Dissertation (MSc (Applied Mathematics))--University of Pretoria, 2007. / Mathematics and Applied Mathematics / unrestricted

The focus of this thesis is the theory of periodic homogenization of partial differential equations and some applicable concepts of convergence. More precisely, we study parabolic problems exhibiting both spatial and temporal microscopic oscillations and a vanishing volumetric heat capacity type of coefficient. We also consider a hyperbolic-parabolic problem with two spatial microscopic scales. The tools used are evolution settings of multiscale and very weak multiscale convergence, which are extensions of, or closely related to, the classical method of two-scale convergence. The novelty of the research in the thesis is the homogenization results and, for the studied parabolic problems, adapted compactness results of multiscale convergence type.

In der Hefe Yarrowia lipolytica führen Mutationen im GPR1-Gen zu Essigsäuresensitivität. Die Deletion dieses Genes hat demgegenüber keinen Effekt auf den Phänotyp. In dieser Arbeit wurde das Gpr1-Protein näher charakterisiert. Es zeigte sich, dass GPR1-Mutantenstämme wesentlich schneller Acetat akkumulierten als der Wildtyp. Außerdem konnte bestetigt werden, dass Gpr1p ein integrales Membranprotein ist. Mittels Ortspezifischer Analyse wurden verschiedene funktionelle Bereiche untersucht. Das Protein unterliegt zudem einer Phosphorylierung/Dephosphorylierung. Auf der Grundlage der dargelegten Ergebnisse wurde ein Funktionsmodell für Gpr1p erstellt.

It was generally accepted that the rate of formation of cerebrospinal °uid (CSF) is independent of intraventricular pressure [26], until A. Sahar and a host of other scientists challenged this belief. A. Sahar substantiated his belief that the rate of (CSF) formation actually depends on intraventricular pressure, see A. Sahar, 1971 [26]. In this work we show that CSF formation depends on some other factors, including the intraventricular pressure. For the purpose of this study, we used the capillary blood °ow model proposed by K.Boryczko et. al., [5] in which blood °ow in the microvessels was modeled as a two-phase °ow; the solid and the liquid volume phase. CSF is formed from the blood plasma [23] which we assume to be in the liquid volume phase. CSF is a Newtonian °uid [2, 23]. The principles and methods of e®ective area" developed by N. Sauer and R. Maritz [21] for studying the penetration of °uid into permeable walls was used to investigate the ¯ltrate momentum °ux from the intracranial capillary wall through the pia mater and epithelial layer of the choroid plexus into the subarachnoid space. We coupled the dynamic boundary equation with the Navier-Stoke's constitutive equation for incompressible °uid, representing the °uid °ow in the liquid volume phase in the capillary to arrive at our model. / Mathematical sciences / M.Sc.

The Standard Model scalar potential contains a minimum at the Electroweak scale, responsible for the masses of the weak gauge bosons through the Higgs mechanism. However, if the Electroweak minimum is only a local minimum, and there exists a global minimum at a higher energy in the Higgs potential, then in a su ciently old universe we would expect the vacuum expectation value to be at the global minimum. The absence of a global minimum at higher energy is related to the condition that the Higgs self coupling is greater than or equal to zero for all energies. For any model that fails this, we expect new physics to enter before the energy at which the coupling becomes negative. We developed tools to automate the derivation of beta functions for renormalisable gauge theories, and used these to carry out evolution of the renormalisation group equations for the Standard Model and three extensions to the Standard Model | the Standard Model with a fourth generation, the Standard Model with right-handed neutrinos and a Left-Right Symmetric Model. We conclude that of these four models, the Standard Model is the only one in which all the couplings remain perturbative, and in which the Electroweak minimum is a global minimum.