We study the influence of the generation conditions on the group delay of attosecond pulses in high-order harmonic generation in gases. The group delay relative to the fundamental field is found to decrease with increasing gas pressure in the generation cell, reflecting a temporal walk-off due to the dispersive properties of the nonlinear medium. This effect is well reproduced using an on-axis pha

In some European countries, landscape analysis has long been used in support of large-scale planning or major projects such as new trunk roads and mainline rail routes, in line with both the UN's Convention on Environmental Impact Assessment and the European Landscape Convention. Some countries, however, lack a regulatory framework for what should be analysed, how a landscape analysis should be co

Endothelial cells are among the main physiological targets of the pro-inflammatory cytokine tumor necrosis factor-alpha (TNF-alpha). In endothelial cells TNF-alpha elicits a broad spectrum of biological effects including differentiation, proliferation and apoptosis. alpha 1-antitrypsin (AAT), an endogenous inhibitor of serine proteases plays a vital role in protecting host tissue from proteolytic

Background: The aim in the thesis is to study diagnostic issues, clinical features, therapy, and prognosis in selected demyelinative disorders of the nervous system: optic neuritis (ON), primary progressive MS (PPMS), and tumefactive MS (a very rare acute demyelinating disorder). Methods: From an initial cohort of 110 patients with ON collected 19 to 31 years ago, a new follow-up survey was cond

The size distribution of asteroids and Kuiper belt objects in the solar system is difficult to reconcile with a bottom-up formation scenario due to the observed scarcity of objects smaller than similar to 100 km in size. Instead, planetesimals appear to form top-down, with large 100 1000 km bodies forming from the rapid gravitational collapse of dense clumps of small solid particles. In this paper

This paper examines the challenges that climate change raises for animal agriculture and discusses the contributions that may come from a virtue ethics based approach. Two scenarios of the future role of animals in farming are set forth and discussed in terms of their ethical implications. The paper argues that when trying to tackle both climate and animal welfare issues in farming, proposals that

Biocompatible molecules that undergo self-assembly are of high importance in biological and medical applications of nanoscience. Peptides and bile acids are among the most investigated due to their ability to self-organize into many different, often stimuli-sensitive, supramolecular structures. With the aim of preparing molecules mixing the aggregation properties of bile acid and amino acid-based

When a quantum dot is subjected to a thermal gradient, the temperature of electrons entering the dot can be determined from the dot's thermocurrent if the conductance spectrum and background temperature are known. We demonstrate this technique by measuring the temperature difference across a 15 nm quantum dot embedded in a nanowire. This technique can be used when the dot's energy states are separ

Recension av Wolfgand Hansson; Dagen då terrorn förändrade världen.

Since the seminal work of Archibugi and Michie (1995) on the globalization of innovation, several authors have attempted to understand the complex relationship between innovation and internationalization. However, most tend to focus on industrialized countries, just one mode of globalization of innovation and often one traditional indicator of innovation, such as patents or R&D investment, thu

The Human Error Template (HET) is a recently developed methodology for predicting design-induced pilot error. This article describes a validation study undertaken to compare the performance of HET against three contemporary Human Error Identification (HEI) approaches when used to predict pilot errors for an approach and landing task and also to compare analyst error predictions to an approach to e

Statins effectively lower LDL cholesterol levels in large studies and the observed interindividual response variability may be partially explained by genetic variation. Here we perform a pharmacogenetic meta-analysis of genome-wide association studies (GWAS) in studies addressing the LDL cholesterol response to statins, including up to 18,596 statin-treated subjects. We validate the most promising

The average transverse momentum (p(T)) versus the charged-particle multiplicity N-ch was measured in p-Pb collisions at a collision energy per nucleon-nucleon root S-NN = 5.02 TeV and in pp collisions at collision energies of root s = 0.9, 2.76, and 7 TeV in the kinematic range 0.15 < p(T) < 10.0 GeV/c and vertical bar eta vertical bar < 0.3 with the ALICE apparatus at the LHC. These data are comp

The absence of compassion, argues the author, is not the cause of healthcare failures but rather a symptom of deeper systemic failures. The clinical encounter arouses strong emotions of anxiety, fear, and anger in patients which are often projected onto the clinicians. Attempts to protect clinicians through various bureaucratic devices and depersonalization of the patient, constitute as Menzies no

Objective. To investigate alterations of tumor necrosis factor (TNF)-, interleukin (IL)-6, the Notch/Jagged signaling pathway, and hepatocyte proliferation, and their correlation in rats subjected to partial hepatectomy. Material and methods. Blood and liver tissues were sampled immediately (0), 5, 15, 30, 60, 180, 360, and 720 min, and 1, 2, 4, and 7 days after partial (70%) hepatectomy to measur