441 research outputs found
Localization of submembranous cations to the leading end of human neutrophils during chemotaxis.
Global unions: chasing the dream or building the reality?
This article takes as its theme the global restructuring of capital and its impact on worker organization. It argues for a reassertion of class in any analysis of global solidarity, and assesses the opportunities and barriers to effective global unionization. Rooted in the UK experience, the article analyzes the impact of the European social dimension on trade unions, before taking the discussion into a global dimension. It concludes by suggesting that there are reasons for cautious optimism in terms of solidarity building, despite difficult historical legacies and the common replacement of action with rhetoric
Critical values for Lawshe's content validity ratio: revisiting the original methods of calculation
YesThe content validity ratio originally proposed by Lawshe is widely used to quantify content validity and yet methods used to calculate the original critical values were never reported. Methods for original calculation of critical values are suggested along with tables of exact binomial probabilities
Constructing transnational solidarity: the role of campaign governance
Our inductive study of two transnational labour solidarity efforts focuses on the role of campaign governance. Specifically, we study contrasting campaign strategies, tactics and coalition structures in campaigns by two global union federations, UNI Global Union and the IUF, contextualized in terms of how these campaigns unfolded in India. Our contribution consists of two arguments. The first is that a degree of internal consistency amongst different campaign elements is important for success, and the second is that a mode of articulation that allows for local concerns in affiliate countries to find voice in global campaigns is more likely to result in concrete gains at the local level
The AMS-02 RICH Imager Prototype - In-Beam Tests with 20 GeV/c per Nucleon Ions -
A prototype of the AMS Cherenkov imager (RICH) has been tested at CERN by
means of a low intensity 20 GeV/c per nucleon ion beam obtained by
fragmentation of a primary beam of Pb ions. Data have been collected with a
single beam setting, over the range of nuclear charges 2<Z<~45 in various beam
conditions and using different radiators. The charge Z and velocity beta
resolutions have been measured.Comment: 4 pages, contribution to the ICRC 200
Changing a semantics: opportunism or courage?
The generalized models for higher-order logics introduced by Leon Henkin, and
their multiple offspring over the years, have become a standard tool in many
areas of logic. Even so, discussion has persisted about their technical status,
and perhaps even their conceptual legitimacy. This paper gives a systematic
view of generalized model techniques, discusses what they mean in mathematical
and philosophical terms, and presents a few technical themes and results about
their role in algebraic representation, calibrating provability, lowering
complexity, understanding fixed-point logics, and achieving set-theoretic
absoluteness. We also show how thinking about Henkin's approach to semantics of
logical systems in this generality can yield new results, dispelling the
impression of adhocness. This paper is dedicated to Leon Henkin, a deep
logician who has changed the way we all work, while also being an always open,
modest, and encouraging colleague and friend.Comment: 27 pages. To appear in: The life and work of Leon Henkin: Essays on
his contributions (Studies in Universal Logic) eds: Manzano, M., Sain, I. and
Alonso, E., 201
Position resolution and particle identification with the ATLAS EM calorimeter
In the years between 2000 and 2002 several pre-series and series modules of
the ATLAS EM barrel and end-cap calorimeter were exposed to electron, photon
and pion beams. The performance of the calorimeter with respect to its finely
segmented first sampling has been studied. The polar angle resolution has been
found to be in the range 50-60 mrad/sqrt(E (GeV)). The neutral pion rejection
has been measured to be about 3.5 for 90% photon selection efficiency at pT=50
GeV/c. Electron-pion separation studies have indicated that a pion fake rate of
(0.07-0.5)% can be achieved while maintaining 90% electron identification
efficiency for energies up to 40 GeV.Comment: 32 pages, 22 figures, to be published in NIM
Hepatic abnormalities in patients with chronic granulomatous disease
Chronic granulomatous disease (CGD) is a rare congenital disorder characterized
by repeated bacterial and fungal infections. Aside from a high incidence of liver
abscess, little is known about hepatic involvement in CGD. The aim of this study
was to describe the spectrum of liver abnormalities seen in CGD. The charts of
194 patients with CGD followed at the NIH were reviewed, with a focus on liver
abnormalities. Liver enzyme elevations occurred on at least one occasion in 73%
of patients during a mean of 8.9 years of follow-up. ALT elevations were
generally transient. Although transient alkaline phosphatase (ALP) elevations
were also common, persistent ALP elevations lasting up to 17.6 years were seen in
25% of patients. Liver abscess occurred in 35% of patients. Drug-induced
hepatotoxicity was documented in 15% of patients but likely occurred more
frequently. Hepatomegaly was found in 34% and splenomegaly in 56% of patients.
Liver histology showed granulomata in 75% and lobular hepatitis in 90% of
specimens. Venopathy of the portal vein was common (80%) and associated with
splenomegaly. Venopathy of the central vein was also common (63%) and was
associated with the number of abscess episodes. Nodular regenerative hyperplasia
(NRH) was seen in 9 patients, including 6 of 12 autopsy specimens. CONCLUSION:
Liver enzyme abnormalities occur frequently in patients with CGD. In addition to
liver abscesses and granulomata, drug hepatotoxicity is likely underappreciated.
Vascular lesions such as venopathy and--to a lesser extent--NRH are common. The
cause and clinical consequences of venopathy await prospective evaluation
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