We derive the two-loop corrections to Bhabha scattering from heavy fermions using dispersion relations. The double-box contributions are expressed by three kernel functions. Convoluting the perturbative kernels with fermionic threshold functions or with hadronic data allows to determine numerical results for small electron mass m e , combined with arbitrary values of the fermion mass m f in the...

Distributed database directory refresh strategies, commonly recommended for the X.500 standard, are defined and analytically modeled for variations on push/pull and total/differential under idealistic asynchronous control conditions. The models are implemented in a HyperCard-based tool called DirMod (for “directory model”). Experimental test results show important elapsed time performance trade...

1 Faculdade de Educação Física e Dança, Universidade Federal de Goiás, Goiania, Brazil, 2 Laboratório de Pesquisas em Desempenho Humano, Universidade de Pernambuco-Campus Petrolina, Petrolina, Brazil, Departamento de Educação Física, Universidade Federal do Rio Grande do Norte, Natal, Brazil, 4 Institute of Sport Science, University of Koblenz-Landau, Landau, Germany, Department of Biomedical S...

The \textit{Herschel} Astrophysical Terahertz Large Area Survey (H-ATLAS), that has covered about 642 sq. deg. in 5 bands from 100 to 500 $\mu\rm m$, allows a blind flux-limited selection of blazars at sub-mm wavelengths. However, constitute tiny fraction H-ATLAS sources and therefore identifying them is not trivial task. Using the data on known detected by we have defined locus for 500\,$\mu$m...

Importance Exposure to violence continues to be a growing epidemic, particularly among children. An enhanced understanding of the biological effect of exposure to violence is critical. Objective To examine the association between neighborhood violence and cellular and biological stress in children. Design, Setting, and Participants A matched, cross-sectional study of 85 black children aged ...

Accurate high-resolution maps of oil palm plantations underpin effective management environmental and socio-economic impacts at global, regional, national levels. However, young industrial highly irregular small-holder are mostly unmapped not included in official FAO statistics. This issue is addressed here by discriminating global plantation 2020 into four subclasses: Industrial Mature Oil Pal...

The scalar top discovery potential has been studied for the TESLA project with a full-statistics background simulation at √ s = 500 GeV and L = 500 fb−1. The beam polarization is very important to measure the scalar top mixing angle and to determine its mass. The latest estimation of the beam polarization parameters is applied. This study includes e polarization, which improves the sensitivity....

Bright (maximum 11,000 cd m(-2) and 500 cd m(-2) at 20 mA cm(-2)) and efficient (maximum external quantum efficiency of 3.1% at 1 mA cm(-2)) red (CIE, x = 0.66, y = 0.34) organic light-emitting diodes (OLEDs) employ arylaminospirobifluorene-substituted fumaronitriles as the novel non-dopant red emitter.