Sökresultat

A search is performed for top-quark pairs (t (t) over bar) produced together with a photon (gamma) with transverse energy greater than 20 GeV using a sample of t (t) over bar candidate events in final states with jets, missing transverse momentum, and one isolated electron or muon. The data set used corresponds to an integrated luminosity of 4.59 fb(-1) of proton-proton collisions at a center-of-m

The potential machinability for Alloy 718 (Inconel 718) is examined in terms of five material characteristics considered to play a key role in the machinability: ductility (elongation to fracture), strain hardening (ultimate tensile strength over yield strength), thermal conductivity, yield strength and abrasiveness (amount of carbides). The material characteristics are simulated with the software

Results of a search for H -> tau tau decays are presented, based on the full set of proton-proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 fb(-1) and 20.3 fb(-1) at centre-of-mass energies of root s = 7TeV and root s = 8 TeV respectively. All combinations of leptonic (tau -> l nu(nu) over bar with l = e,

Purpose – This paper aims to investigate the strategies used by Swedish citizens to adapt to changing climate variability and extremes. There is an increasing consensus that individual adaptive capacities are critical to successfully adapt to climate change and achieve sustainable development. However, little is known about individual adaptive practices, particularly in developed countries. Design

Interactions between iron (Fe) and arsenic (As) play a vital role in aquatic and terrestrial ecosystems influencing the reactivity and transport of arsenic. A key aspect is the effect of natural organic matter (NOM) on these interactions, and previous investigations have reported the existence of ternary As-Fe-NOM species. In this study, the reactivity of Fe, from a boreal stream water, towards As

The mechanisms for oxygen etching of graphene on Ir(111) are uncovered through a systematic variation of the graphene morphology - ranging from an impermeable graphene layer to graphene nanoflakes - and the application of complementary experimental methods, including scanning tunneling microscopy, X-ray photoelectron spectroscopy, and temperature programmed desorption. Associated with a strong var

This study describes an efficient isolation procedure for the extraction of polar lipids from two strains of bifidobacteria - Bifidobacterium longum and Bifidobacterium angulatum. We first compared the lipid profiles of two strains of bifidobacteria and showed that the strains of the same genus may differ by lipid composition of cell walls. The polar lipids were isolated using the following condit

We argue that our common diseases should not necessarily be taken as a sign of physiological error. Regulatory networks developed by evolutionary forces to support reproductive fitness happen to include disease as a side-effect. For example, inflammatory and autoimmune diseases are secondary to a strong defence against infections. An evolutionary perspective can help us understand why many drugs t

Six different ionomers having various aromatic polymer backbones with pendant 2-sulfobenzoyl side chains were prepared by nucleophilic aromatic substitution reactions of lithium 2,6-difluoro-2′-sulfobenzophenone with 4,4-biphenol, 2,7-dihydroxynaphthalene, 4,4-isopropylidenediphenol, 4,4-dihydroxydiphenyl ether, 4,4′-thiodiphenol, and 4,4′-thiobisbenzenethiol, respectively, to produce four poly(ar

Matrix metalloproteinase-9 (MMP-9) regulates platelet shedding of CD40L in abdominal sepsis. However, the signaling mechanisms controlling sepsis-induced shedding of CD40L from activated platelets remain elusive. Rac1 has been reported to regulate diverse functions in platelets; we hypothesized herein that Rac1 might regulate platelet shedding of CD40L in sepsis. The specific Rac1 inhibitor NSC237

Background Small studies suggest that postconditioning reperfusion interrupted by brief repetitive cycles of reocclusions, may protect the myocardium in the clinical setting. Objective To test the hypothesis that postconditioning limits infarct size in relation to the area at risk in patients with ST elevation myocardial infarction (STEMI). Methods 76 patients (aged 37-87 years) eligible for prima

Entanglement between spatially separated electrons in nanoscale transport is a fundamental property, yet to be demonstrated experimentally. Here we propose and analyse theoretically the transport statistics of a generic spin entangler coupled to a hybrid quantum dot-ferromagnet detector system. We show that the full distribution of charges arriving at the ferromagnetic terminals provides complete

We investigated atmospheric aerosol particle dynamics in a boreal forest zone in northern Scandinavia. We used aerosol number size distribution data measured with either a differential mobility particle sizer (DMPS) or scanning mobility particle sizer (SMPS) at three stations (Varrio, Pallas and Abisko), and combined these data with the HYSPLIT (Hybrid Single Particle Lagrangian Integrated Traject

Immune system is highly integrated with the nervous and endocrine systems, which is thought to result in covariation between behavioural syndromes and stress- and immune-associated diseases. Very little is known about the associations between behaviour and immune traits in wild animals. Here we describe such an association in passerine birds, the greenfinches (Carduelis chloris). When wild-caught

The purpose of this research note is to provide an empirical indication of how China's increasing role in the South Pacific has been presented in their own and other nations' media over the last 20 years. What is the tone of coverage? Which issues are salient? How does this vary by nation? What changes are there over time? This research note reports information derived from over 1000 articles publ

This article introduces a new methodology for deriving the dynamics of visual segmentation in relation to the underlying cognitive processes involved. The method combines social semiotics approaches to visual segmentation with eye-tracking studies on authentic image viewing and simultaneous image description. The authors' thesis is that visual segmentation suggested by the social semiotic approach

Biofuels for transport are attracting considerable support from the European Union. However, the complexity of the biofuels industry and the diversity of actors create significant challenges for policy-making and governance. This paper explores the role of governance in the development of the biofuels industry in Europe focusing on Sweden and the UK. The purpose of this paper is to investigate the