7,528 research outputs found
Computing the Mertens and Meissel-Mertens constants for sums over arithmetic progressions
We give explicit numerical values with 100 decimal digits for the Mertens
constant involved in the asymptotic formula for and, as a by-product, for the Meissel-Mertens constant
defined as , for , ...,
and .Comment: 12 pages, 6 table
Scalar Top Quark Studies with Various Visible Energies
The precision determination of scalar top quark properties will play an
important role at a future International Linear Collider (ILC). Recent and
ongoing studies are discussed for different experimental topologies in the
detector. First results are presented for small mass differences between the
scalar top and neutralino masses. This corresponds to a small expected visible
energy in the detector. An ILC will be a unique accelerator to explore this
scenario. In addition to finding the existence of light stop quarks, the
precise measurement of their properties is crucial for testing their impact on
the dark matter relic abundance and the mechanism of electroweak baryogenesis.
Significant sensitivity for mass differences down to 5 GeV are obtained. The
simulation is based on a fast and realistic detector simulation. A vertex
detector concept of the Linear Collider Flavor Identification
(LCFI)collaboration, which studies pixel detectors for heavy quark flavour
identification, is implemented in the simulations for c-quark tagging. The
study extends simulations for large mass differences (large visible energy) for
which aspects of different detector simulations, the vertex detector design,
and different methods for the determination of the scalar top mass are
discussed. Based on the detailed simulations we study the uncertainties for the
dark matter density predictions and their estimated uncertainties from various
sources. In the region of parameters where stop-neutralino co-annihilation
leads to a value of the relic density consistent with experimental results, as
precisely determined by the Wilkinson Microwave Anisotropy Probe (WMAP), the
stop-neutralino mass difference is small and the ILC will be able to explore
this region efficiently.Comment: 11 pages, 11 figures, presented at SUSY'0
History matters: on the mystifying appeal of Bowles and Gintis
Sam Bowles and Herb Gintis have made a broad and sustained contribution to many areas of contemporary economic thought and policy discussions, centring on human interactions in economic settings. Since the mid-1980s, their work, collectively and individually, has developed from a concern with contested exchanges to analyses of behavioural repertoires pursued through evolutionary game theory in which they claim that ‘history matters’. Despite their alignment with the mainstream, they retain an appeal to some heterodox economists. We argue that this appeal is misplaced. Their theoretical work and knowledge claims rest on methodological individualism and equilibrium reasoning, which fosters an obtuse reductionism. They present a confused methodology, which seems to be motivated by a desire to remain coherent to standard economics. We show how their acceptance of methodological individualism and ergodic modelling undermines their knowledge claims as well as their declaration that history matters in their analysis
Cardiorespiratory Fitness Is Inversely Associated With Clustering of Metabolic Syndrome Risk Factors: The Ball State Adult Fitness Program Longitudinal Lifestyle Study
Objective: The focus of this study was the association between the metabolic syndrome (MetSyn) and cardiorespiratory fitness (CRF) defined as maximal oxygen uptake (VO2max). Although previous research has shown a relationship between MetSyn and CRF, most studies are based on less objective measures of CRF and different cardiometabolic risk factor thresholds from earlier guidelines
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