840 research outputs found
Does Foreign Direct Investment Promote Regional Development in Developed Countries? A Markov Chain Approach for US States.
Direktinvestition; Regionale Entwicklung; Sozialprodukt; Regionale DisparitÀt; SchÀtzung; USA;Markov transition probability , likelihood ratio test , FDI , per-capita income , regional development , United States of America;
Testing perturbation theory on the nf=0 static quark potential
The perturbative expansion of static force and potential is reanalyzed
concerning its practical applicability. A well behaved perturbative prediction
is given by the integration of the renormalization group equation for the
coupling . Since the Lambda-parameter
of the \nf=0 theory is known from previous work, the perturbative prediction
contains no free parameter. It is confronted with recent non-perturbative
results. For where the truncation error of the perturbative
expression is naively estimated to be moderate, it is really quite accurate and
large ``non-perturbative terms'' are excluded.Comment: Added comment on known alpha^4 log(alpha) term (page 8), References
and acknowledgemen
Old finds-new insights: remarks on two Roman lead ingots from Minas de Riotinto (Huelva, España)
The authors analyze two Roman lead ingots found at Minas de Riotinto and only known by old photographs. Both ingots can be attributed to an entrepreneur involved in the mining business of st century BCLos autores analizan dos lingotes de plomo romanas encontradas en Minas de Riotinto y sĂłlo conocen por fotos antiguas. Ambos lingotes se pueden atribuir a un empresario involucrado en el negocio minero de Cartagena en la primera mitad del siglo primero a.C
Mixed peridynamic formulations for compressible and incompressible finite deformations
The large flexibility of meshfree solution schemes makes them attractive for many kinds of engineering applications, like Additive Manufacturing or cutting processes. While numerous meshfree methods were developed over the years, the accuracy and robustness are still challenging and critical issues. Stabilization techniques of various kinds are typically used to overcome these problems, but often require the tuning of unphysical parameters. The Peridynamic PetrovâGalerkin method is a generalization of the peridynamic theory of correspondence materials and offers a stable and robust alternative. In this work, the stabilization free approach is extended to three dimensional problems of finite elasticity. Locking-free mixed formulations for nearly incompressible and incompressible materials are developed and investigated in convergence studies. In general, an efficient implicit quasi-static framework based on Automatic Differentiation is presented. The numerical examples highlight the convergence properties and robustness of the proposed formulations. © 2020, The Author(s)
Influenza A positive but H1N1 negative myocarditis in a patient coming from a high outbreak region of new influenza
We present the case of a 21 year-old man holidaying on the Spanish island of Mallorca,
a region of high outbreak of infections with a new influenza A/H1N1 virus. Symptomatic
influenza A infection, but not H1N1 positive, led to myocarditis after intimate contact with
a woman with positive H1N1 titer. The electrocardiogram showed T-wave inversions in II, III,
aVF and V5, V6. Serum chemistry showed elevated levels of troponin T, increased creatine
kinase (CK) and CK myocardial band. Cardiac magnetic resonance imaging revealed mid-
-myocardial and subepicardial hyperintensities in the lateral wall, and subepicardial and
mid-myocardial areas of gadolinium enhancement in the inferior wall. Despite intimate contact
with an H1N1 positive patient, the analyses on H1N1 (H1 A/Brisbane/59/07, H1 A/
/California/7/09swine) were negative, but were positive for common influenza (H3 A/Brisbane/
/10/07). Myocarditis is a rare clinical manifestation of influenza A infection. (Cardiol J 2011; 18,
4: 441–445
The running quark mass in the SF scheme and its two-loop anomalous dimension
The non-perturbatively defined running quark mass introduced by the ALPHA
collaboration is based on the PCAC relation between correlation functions
derived from the Schr\"odinger functional (SF). In order to complete its
definition it remains to specify a number of parameters, including the ratio of
time to spatial extent, , and the angle which appears in the
spatial boundary conditions for the quark fields. We investigate the running
mass in perturbation theory and propose a choice of parameters which attains
two desired properties: firstly the two-loop anomalous dimension \d1SF is
reasonably small. This is needed in order to ease matching with the
non-perturbative computations and to achieve a precise determination of the
renormalization group invariant quark mass. Secondly, to one-loop order of
perturbation theory, cut-off effects in the step-scaling function are small in
O() improved lattice QCD.Comment: 17 pages, gzipped tar-fil
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