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Popular Abstract in Swedish Frågan om Amerikas kulturella ställning i förhållande till den övriga världen är av central betydelse för all forskning som berör Amerikas och det moderna Europas historia. Det här förhållandet har blivit påtagligare under senare tid beroende av vårt samhälles senare "kris" med det s. k. "postmoderna" - och "globaliserade" - perspektivets genombrott. I avhandlingen presThe question of America’s cultural position in relation to the rest of the world is essential for all research connected to America and to the history of modern Europe. This situation has become obvious over the last years because of our societies’ latest “crisis”, with the consecration of the “post-modern” and “global” view of society, history and culture. The aim of the dissertation is to analys

The edge strength of glass is analyzed using a Weibull statistical framework based on 78 data samples from a range of experiments recorded in literature. Based on the analysis, a 45 MPa strength value (computed as the lower bound in a one-sided confidence interval at the 75% level for the 5-percentile in the distribution) could be conservatively used with arrised, ground and polished edges when re

The idea of employees as important (strategic) communicators has emerged in both strategic communication theory and practice during the 21st century. Researchers increasingly urge managers to consider employees as important communicators, and employees’ communication role is increasingly formalized as organizations explicate the importance of all employees taking responsibility for communication i

En främre korsbandsskada i knät är vanligt förekommande bland fysiskt aktiva personer inom sporter som innehåller vridningar, inbromsningar och snabba riktningsförändringar, såsom handboll och fotboll. Skadan kan exempelvis leda till en instabil knäled, försämrad funktion i vardagliga och idrottspecifika aktiviteter, försvagade lårmuskler, försämrad rörelsekvalité och nedsatt självskattad funktionRupture of the anterior cruciate ligament (ACL) is a common knee injury among young physically active populations. The injury results in impaired physical functions, such as joint instability, limitations in daily activities and sport-specific activities, and worse movement quality, e.g., altered postural orientation. Postural orientation is defined as the ability to maintain alignment between bod

Background and study aims : Capsule endoscopy (CE) is invaluable for minimally invasive endoscopy of the gastrointestinal tract; however, several technological limitations remain including lack of reliable lesion localization. We present an approach to 3D reconstruction and localization using visual information from 2D CE images.Patients and methods : Colored thumbtacks were secured in rows to the

In this licentiate thesis, I explore how two theoretical frameworks—social semiotics and the variation theory of learning—used in physics education research, can be fruitfully combined to obtain additional analytical tools for analysing student learning in introductory level university physics. Each theoretical framework has on their own, or together with other frameworks, been successfully applie

Different anion-exchange membranes (AEMs) based on polystyrene (PS) carrying benzyltrimethyl ammonium cations are currently developed for use in alkaline fuel cells and water electrolyzers. However, the stability of these state-of-the-art cations needs to be further improved. Here, we introduce highly alkali-stable mono- and spirocyclic piperidine-based cations onto PS by first performing a supera

The present work is intended as a nonmathematical review of the role of flow and motion in nuclear magnetic resonance (MR) imaging. A historical review of MR flow measurement techniques is given, followed by a short overview of flow models in vitro and in vivo. The theory behind the influence of motion on the modulus and phase MR signal information is discussed and effects such as washin/washout,

The finite difference time domain (FDTD)-method is applied to model transverse electromagnetic (TEM) transmission cells in three dimensions. The perturbation of the TEM-mode and the standard field distribution in the TEM-cell, due to inhomogeneous materials placed inside the cell cavity, is evaluated. Particularly, the dependence of the disturbance of the TEM-mode on the dimensions of the material

The objective of this study is a non-invasive assessment of the thermal dose in hyperthermia. Electrical impedance tomography (EIT) has previously been given a first trial as a temperature monitoring method together with microwave-induced hyperthermia treatment, but it has not been thoroughly investigated. In the present work we have examined this method in order to investigate the correlation in

The objective of this study is to improve the quality of the hardware of the existing Lund impedance tomography system. Improvement in the current generator and different isolation proposals are presented.

The aim of this study was to establish a rapid method for in vivo quantification of a large range of flow velocities using phase information. A basic gradient-echo sequence was constructed, in which flow was encoded along the slice selection direction by variation of the amplitude of a bipolar gradient without changes in sequence timings. The influence of field inhomogeneities and eddy currents wa