Conversion factors, which relate the kerma-area product to effective dose, have been estimated for paediatric cardiac x-ray angiography. Monte Carlo techniques have been used to calculate the conversion factors for a wide range of projection angles for children of five ages and for adults. Correction factors are provided so that the conversion factors can be adjusted for different tube potentia...

SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) is part of the payload of ESA’s Environmental Satellite ENVISAT which was launched into a sun-synchronous polar orbit on 2002-03-01. First in-flight validation results already showed inconsistencies of the radiometric calibration of SCIAMACHY. Hence the on-ground calibration was thoroughly revised and correction f...

The effects due to soft-photon emission (and the related virtual corrections) in multibody decays of B, D, and K mesons are analysed. We present analytic expressions for the universal O(α) correction factors which can be applied to all multi-body decay modes where a tight soft-photon energy cut in the decaying-particle rest-frame is applied. All-order resummations valid in the limit of small an...

The ‘Simultaneous Maximum-Likelihood Attenuation Correction Factors’ (sMLACF) algorithm presented here, is an iterative algorithm to calculate the maximum-likelihood (ML) estimate of the activity λ and the attenuation correction factors a in time-of-flight (TOF) positron emission tomography (PET), and this from emission data only. sMLACF is derived using the expectation-maximization (EM) princi...

the acid-base status and arterial blood gas change with temperature variation. to determine the changes in arterial ph and pc02, arterial blood samples of 50 neonates with different clinical conditions were examined at temperatures of 35 to 42°c with an increment of 0.5° c, which resulted in two nonlinear equations with perfect fit on data. the temperature correction factors of these equations,...

Caries correction factors were applied to a Punic (6th-2nd century BC) rural sample from the island of Ibiza (Spain). Data obtained on dental caries and ante-mortem tooth loss provided a corrected rate of 12.8% of teeth with caries. This result, in conjunction with other sources of information such as stable isotope analysis and documentary evidence, indicated a diet based on terrestrial protei...

In order to describe the comovements in both conditional mean and conditional variance of high dimensional nonstationary time series by dimension reduction, we introduce the conditional heteroscedasticity with factor structure to the error correction model. The new model is called the error correction–volatility factor model. Some specification and estimation approaches are developed. In partic...