Search results

Filter

Filetype

Your search for "*" yielded 527060 hits

Supplemental instruction for improving first year results in engineering studies

Many studies have been made on the impact of supplemental instruction in supported courses, most show significantly better examination results for students attending supplemental instruction in comparison to those who do not. However, remarkably little attention has been devoted to following up whether the benefits of supplemental instruction reach beyond the course it supports. The present study

Diagnosing and Mapping Pulmonary Emphysema on X-Ray Projection Images: Incremental Value of Grating-Based X-Ray Dark-Field Imaging

Purpose: To assess whether grating-based X-ray dark-field imaging can increase the sensitivity of X-ray projection images in the diagnosis of pulmonary emphysema and allow for a more accurate assessment of emphysema distribution. Materials and Methods: Lungs from three mice with pulmonary emphysema and three healthy mice were imaged ex vivo using a laser-driven compact synchrotron X-ray source. Me

Comparison between remote sensing and a dynamic vegetation model for estimating terrestrial primary production of Africa

Africa is an important part of the global carbon cycle. It is also a continent facing potential problems due to increasing resource demand in combination with climate change-induced changes in resource supply. Quantifying the pools and fluxes constituting the terrestrial African carbon cycle is a challenge, because of uncertainties in meteorological driver data, lack of validation data, and potent

Increased risk of end-stage renal disease in individuals with coeliac disease

Objective The prevalence of end-stage renal disease (ESRD) is increasing worldwide. Although increased levels of coeliac disease (CD) autoantibodies are often seen in renal disease, the importance of biopsy-verified CD for the risk of future ESRD is unclear. The aim of this study was therefore to investigate the risk of future ESRD in individuals with CD. Methods This was a population-based prospe

Increased availability of NADH in metabolically engineered baker's yeast improves transaminase-oxidoreductase coupled asymmetric whole-cell bioconversion.

Saccharomyces cerevisiae can be engineered to perform a multitude of different chemical reactions that are not programmed in its original genetic code. It has a large potential to function as whole-cell biocatalyst for one-pot multistep synthesis of various organic molecules, and it may thus serve as a powerful alternative or complement to traditional organic synthetic routes for new chemical enti

Sparse Localization of Harmonic Audio Sources

In this paper, we propose a novel method for estimating the locations of near- and/or far-field harmonic audio sources impinging on an arbitrary, but calibrated, sensor array. Using a joint pitch and location estimation formed in two steps, we first estimate the fundamental frequencies and complex amplitudes under a sinusoidal model assumption, whereafter the location of each source is found by ut

Fatigue testing and microstructural characterization of tungsten heavy alloy Densimet 185

A rotating target consisting of helium-cooled tungsten has been chosen for the European Spallation Source (ESS) facility to be built in Lund. Thermo-mechanical cycling due to the incidence of the proton beam every 2 s on any given tungsten slab in the rotating wheel could lead to crack formation and failure over the lifetime of the target. This work reports tensile and fatigue data obtained at roo

Using Supplemental Instruction to Bridge the Transition from Secondary to Tertiary Education

Supplemental Instruction (SI) is today a well known academic assistance program, providing help for students in “difficult” courses at colleges and universities. Little attention has been paid however to the possibility of also implementing the SI program in upper secondary school. In this study we present qualitative results from such an SI program in a Swedish setting. Here, students from the fa

Does attention move or spread during mental curve tracing?

There are two theories that attempt to explain how attention is deployed when lines are traced. Initially, it was believed that a covert zoom lens moved along the line. Recent evidence has, however, suggested that attention spreads along the line, rather than moving along it, perhaps as part of an effortful object-parsing process. Three experiments tested the spreading and moving accounts of line

Radio-Frequency Characterization of Selectively Regrown InGaAs Lateral Nanowire MOSFETs

We demonstrate InGaAs multigate MOSFETs, so-called FinFETs. The lateral nanowires constituting the channel in these devices have been formed using selective area regrowth, where the surfaces of the nanowires are crystallographic planes. L-g = 32 nm devices exhibit peak transconductance of 1.8 mS/mu m at V-ds = 0.5 V. We also report on RF characterization of these devices. A small-signal hybrid-p m

Evaluation of the Mechanistic-Empirical Pavement Design Guide model for permanent deformations in asphalt concrete

The model for permanent deformation in asphalt concrete (AC) layers used in the Mechanistic-Empirical Pavement Design Guide (MEPDG) was evaluated. Two instrumented flexible pavements were subjected to heavy vehicle simulator testing at three constant temperatures. Permanent deformation modelling was carried out using the MEPDG software v1.003 at the highest accuracy level. The nationally calibrate

Liposuction Normalizes - in Contrast to Other Therapies - Lymphedema-Induced Adipose Tissue Hypertrophy

The various types of treatment of lymphedema are under discussion and there has been some controversy regarding liposuction for lymphedema. Although it is clear that conservative therapies such as complex decongestive therapy (CDT) and controlled compression therapy (CCT) should be tried in the first instance, options for the treatment of late-stage lymphedema that is not responding to such treatm

Is the university model an organizational necessity? Scale and agglomeration effects in science

In this paper we argue that the emergence of the dominant model of university organization, which is characterized by a large agglomeration of many (often loosely affiliated) small research groups, might have an economic explanation that relates to the features of the scientific production process. In particular, we argue that there are decreasing returns to scale on the level of the individual re

Is it simply getting worse? Agriculture and Swedish greenhouse gas emissions over 200 years

This paper challenges the idea that emissions of greenhouse gases simply increase over time with income. It adopts a 200-year perspective and includes the important flows of greenhouse gases related to agriculture, not just the CO2 from fossil fuels. The result is that the pattern of Swedish total greenhouse gas emissions over time resembles an N. In contrast, when only emissions from fossil fuels

Identification of conformational epitopes for human IgG on chemotaxis inhibitory protein of Staphylococcus aureus

Background The Chemotaxis inhibitory protein of Staphylococcus aureus (CHIPS) blocks the Complement fragment C5a receptor (C5aR) and formylated peptide receptor (FPR) and is thereby a potent inhibitor of neutrophil chemotaxis and activation of inflammatory responses. The majority of the healthy human population has antibodies against CHIPS that have been shown to interfere with its function in vit

Development and evaluation of an improved quantitative Y-90 bremsstrahlung SPECT method

Purpose: Yttrium-90 (Y-90) is one of the most commonly used radionuclides in targeted radionuclide therapy (TRT). Since it decays with essentially no gamma photon emissions, surrogate radionuclides (e.g., In-111) or imaging agents (e.g., Tc-99m MAA) are typically used for treatment planning. It would, however, be useful to image Y-90 directly in order to confirm that the distributions measured wit