In this article, we present satellite data analysis of atmospheric Sulfur Dioxide (SO2) from volcanic eruptions and anthropogenic activities. Data from Global Ozone Monitoring Experiment (GOME) on board ERS-2 for the years 1996 to 2002 is analyzed using a DOAS based algorithm with the aim of retrieving SO2 Slant Column Densities (SCDs). Difficulties in the retrieval of SO2 SCDs due to instrumen...

Relations between pulmonary symptoms and exposure to respirable dust and sulphur dioxide (SO2) were evaluated for 145 silicon carbide (SiC) production workers with an average of 13.9 (range 3-41) years of experience in this industry. Eight hour time weighted average exposures to SO2 were 1.5 ppm or less with momentary peaks up to 4 ppm. Cumulative SO2 exposure averaged 1.94 (range 0.02-19.5) pp...

The heterogeneous reaction SO2 + H2O2 → H2SO4 on ice at 228 K has been studied in a low temperature coated-wall flow tube. With H2O2 in excess of SO2, the loss of SO2 on an ice surface is time dependent with the reaction most efficient on a freshly exposed surface. The deactivation of the surface arises because the protons formed in the reaction inhibit the dissociation of adsorbed SO2. This lo...

[1] Fast time resolution (>1 Hz) sulfur dioxide (SO2) measurements were obtained using an atmospheric pressure ionization mass spectrometer with isotopically labeled internal standard on the NASA Wallops P-3B during the NASA Transport and Chemical Evolution Over the Pacific (TRACE-P) field experiment. The high time resolution for SO2 allowed a view into the dynamics of SO2 transport, including ...

INTRODUCTION Decreases in oxygen saturation (SO2) and lactate concentration [Lac] from superior vena cava (SVC) to pulmonary artery have been reported. These gradients (Delta SO2 and Delta[Lac]) are probably created by diluting SVC blood with blood of lower SO2 and [Lac]. We tested the hypothesis that Delta SO2 and Delta[Lac] result from mixing SVC and inferior vena cava (IVC) blood streams. ...

9 The recently developed computer program BayesX provides a Bayesian approach to the estima10 tion of non-parametric additive models. Such models can be useful in applications when the effect 11 of metrical covariates (such as time) are to be estimated while controlling for other factors. In an 12 application of this methodology, trends in the height of West Point cadets in the 19th century are...

16 In this paper we present MILONGA, a language based on functional programming concepts, which was designed 17 for the implementation of a new generation of nonterm-rewriting elimination algorithms for multivariate polynomial 18 solving [J. Pure Appl. Alg. 124 (1998) 101; J. Pure Appl. Alg. 117/118 (1997) 277; Appl. Alg. Eng. Commun. 19 Comput. 11 (4) (2001) 239; J. Complex. 17 (1) (2001) 154]...

This article describes the path-mapping theory of how humans integrate analogical mapping and general problem solving. The theory posits that humans represent analogs with declarative roles, map analogs by lower-level retrieval of analogous role paths, and coordinate mappings with higher-level organizational knowledge. Implemented in the ACT-R cognitive architecture, the path-mapping theory ena...

The identi®ability problem is addressed for n-compartment linear mammillary and catenary models, for the common case of input and output in the ®rst compartment and prior information about one or more model rate constants. We ®rst de®ne the concept of independent constraints and show that n-compartment linear mammillary or catenary models are uniquely identi®able under nÿ 1 independent constrai...

This paper studies the point location problem in Delaunay triangulations without preprocessing and additional storage. The proposed procedure finds the query point by simply “walking through” the triangulation, after selecting a “good starting point” by random sampling. The analysis generalizes and extends a recent result for d = 2 dimensions by proving this procedure takes expected time close ...