1,762 research outputs found
Re-engineering a nanodosimetry Monte Carlo code into Geant4: software design and first results
A set of physics models for nanodosimetry simulation is being re-engineered
for use in Geant4-based simulations. This extension of Geant4 capabilities is
part of a larger scale R&D project for multi-scale simulation involving
adaptable, co-working condensed and discrete transport schemes. The project in
progress reengineers the physics modeling capabilities associated with an
existing FORTRAN track-structure code for nanodosimetry into a software design
suitable to collaborate with an object oriented simulation kernel. The first
experience and results of the ongoing re-engineering process are presented.Comment: 4 pages, 2 figures and images, to appear in proceedings of the
Nuclear Science Symposium and Medical Imaging Conference 2009, Orland
Publication patterns in HEP computing
An overview of the evolution of computing-oriented publications in high
energy physics following the start of operation of LHC. Quantitative analyses
are illustrated, which document the production of scholarly papers on
computing-related topics by high energy physics experiments and core tools
projects, and the citations they receive. Several scientometric indicators are
analyzed to characterize the role of computing in high energy physics
literature. Distinctive features of software-oriented and hardware-oriented
scholarly publications are highlighted. Current patterns and trends are
compared to the situation in previous generations' experiments.Comment: To be published in the Proc. of CHEP (Computing in High Energy
Physics) 201
Scholarly literature and the press: scientific impact and social perception of physics computing
The broad coverage of the search for the Higgs boson in the mainstream media
is a relative novelty for high energy physics (HEP) research, whose
achievements have traditionally been limited to scholarly literature. This
paper illustrates the results of a scientometric analysis of HEP computing in
scientific literature, institutional media and the press, and a comparative
overview of similar metrics concerning representative particle physics
measurements. The picture emerging from these scientometric data documents the
scientific impact and social perception of HEP computing. The results of this
analysis suggest that improved communication of the scientific and social role
of HEP computing would be beneficial to the high energy physics community.Comment: To be published in the Proceedings of CHEP 2013 (Computing in High
Energy Physics
‘Walking ... just walking’: how children and young people’s everyday pedestrian practices matter
In this paper we consider the importance of ‘walking… just walking’ for many children and young people’s everyday lives. We will show how, in our research with 175 9-16-year-olds living in new urban developments in south-east England, some particular (daily, taken-for-granted, ostensibly aimless) forms of walking were central to the lives, experiences and friendships of most children and young people. The main body of the paper highlights key characteristics of these walking practices, and their constitutive role in these children and young people’s social and cultural geography. Over the course of the paper we will argue that ‘everyday pedestrian practices’ (after Middleton 2010, 2011) like these require us to think critically about two bodies of geographical and social scientific research. On one hand, we will argue that the large body of research on children’s spatial range and independent mobility could be conceptually enlivened and extended to acknowledge bodily, social, sociotechnical and habitual practices. On the other hand, we will suggest that the empirical details of such practices should prompt critical reflection upon the wonderfully rich, multidisciplinary vein of conceptualisation latterly termed ‘new walking studies’ (Lorimer 2011). Indeed, in conclusion we shall argue that the theoretical vivacity of walking studies, and the concerns of more applied empirical approaches such as work on children’s independent mobility, could productively be interrelated. In so doing we open out a wider challenge to social and cultural geographers, to expedite this kind of interrelation in other research contexts
The impact of Monte Carlo simulation: a scientometric analysis of scholarly literature
A scientometric analysis of Monte Carlo simulation and Monte Carlo codes has
been performed over a set of representative scholarly journals related to
radiation physics. The results of this study are reported and discussed. They
document and quantitatively appraise the role of Monte Carlo methods and codes
in scientific research and engineering applications.Comment: 5 pages, to appear in proceedings of the Joint International
Conference on Supercomputing in Nuclear Applications and Monte Carlo 2010
(SNA + MC2010
Direct Wavelet Expansion of the Primordial Power Spectrum
In order to constrain and possibly detect unusual physics during inflation,
we allow the power spectrum of primordial matter density fluctuations,
P_{in}(k), to be an arbitrary function in the estimation of cosmological
parameters from data. The multi-resolution and good localization properties of
orthogonal wavelets make them suitable for detecting features in P_{in}(k). We
expand P_{in}(k) directly in wavelet basis functions. The likelihood of the
data is thus a function of the wavelet coefficients of P_{in}(k), as well as
the H_0, \Omega_b h^2, \Lambda$CDM
cosmology. We derive constraints on these parameters from CMB anisotropy data
(WMAP, CBI, and ACBAR) and large scale structure (LSS) data (2dFGRS and PSCZ)
using the Markov Chain Monte Carlo (MCMC) technique. The direct wavelet
expansion method is different and complimentary to the wavelet band power
method of Mukherjee & Wang (2003a,b), and results from the two methods are
consistent. In addition, as we demonstrate, the direct wavelet expansion method
has the advantage that once the wavelet coefficients have been constrained, the
reconstruction of P_{in}(k) can be effectively denoised, i.e., P_{in}(k) can be
reconstructed using only the coefficients that, say, deviate from zero at
greater than 1\sigma. In doing so the essential properties of P_{in}(k) are
retained. The reconstruction also suffers much less from the correlated errors
of binning methods. The shape of the primordial power spectrum, as
reconstructed in detail here, reveals an interesting new feature at 0.001 \la
k/{Mpc}^{-1} \la 0.005. It will be interesting to see if this feature is
confirmed by future data. The reconstructed and denoised P_{in}(k) is favored
over the scale-invariant and power-law forms at \ga 1\sigma.Comment: ApJ accepted. Color figures available upon request from
[email protected]
The treatment of hyperinsulinemic hypoglycaemia in adults: an update
Treatment of hyperinsulinemic hypoglycaemia (HH) is challenging due to the rarity of this condition and the difficulty of differential diagnosis. The aim of this article is to give an overview of the recent literature on the management of adult HH
ESHRE's good practice guide for cross-border reproductive care for centers and practitioners
This paper outlines ESHRE's guidance for centers and physicians providing fertility treatment to foreign patients. This guide aims to ensure high-quality and safe assisted reproduction treatment, taking into account the patients, their future child and the interests of third-party collaborators such as gametes donors and surrogates. This is achieved by including considerations of equity, safety, efficiency, effectiveness (including evidence-based care), timeliness and patient centeredness
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