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80 results on '"Petersen, S.A."'

6. Effect of parental smoking on cotinine levels in newborns

Author

Joseph, D.V., Jackson, J.A., Westaway, J., Taub, N.A., Petersen, S.A., and Wailoo, M.P.

Subjects
Passive smoking -- Health aspects, Passive smoking -- Influence, Infants (Newborn) -- Medical examination, Cotinine -- Health aspects, Cotinine -- Measurement, Family and marriage, Health, Women's issues/gender studies
Published
2007

8. Early physiological development of infants with intrauterine growth retardation

Author

Jackson, J.A., Wailoo, M.P., Thompson, J.R., and Petersen, S.A.

Subjects
Physiological aspects, Infant development -- Physiological aspects, Fetal growth retardation -- Physiological aspects, Fetus -- Growth retardation, Infants -- Development
Abstract

Arch Dis Child Fetal Neonatal Ed 2004;89:F46-F50 Objectives: To assess the patterns of early postnatal physiological adaptation and maturation in intrauterine growth retarded (IUGR) infants by measuring changes in sleeping [...]

Published
2004

9. Sleeping position and rectal temperature

Author

Petersen, S.A., Anderson, E.S., Lodemore, M., Rawson, D., and Wailoo, M.P.

Subjects
Body temperature -- Physiological aspects, Infants -- Sleep, Sudden infant death syndrome -- Physiological aspects, Sleep positions -- Physiological aspects
Published
1991

15. An approximate 3D computational method for real-time computation of induction logging responses

Author

Bensdorp, S. (author), Petersen, S.A. (author), Van den Berg, P.M. (author), Fokkema, J.T. (author), Bensdorp, S. (author), Petersen, S.A. (author), Van den Berg, P.M. (author), and Fokkema, J.T. (author)

Abstract

Over many years, induction logging systems have been used to create well formation logs. The major drawback for the utilization of these tools is the long simulation time for a single forward computation. We proposed an efficient computational method based on a contrast-type of integral-equation formulation, in which we applied an approximation for the 3D electromagnetic field. We assumed that the dominant contribution in the integral equation is obtained by the contribution around the singularity of Green’s kernel. It is expected that the approximation yields reliable results when the (homogeneous) background conductivity around the logging tool is close to the actual conductivity at the location of the tool. We have developed a data-driven method to determine this background conductivity from the dominant part of the measured coaxial magnetic fields, which are mainly influenced by the conductivity at the tool sensors. For a synthetic model, the results were compared to the ones of a rigorous solution of the integral equation and show a good simulation response to small-scale variations in the medium. Further, the method was used to simulate the response of a realistic reservoir model. Such a model is created by a geological modeling program. We concluded that our approximate method was able to improve the approximation results in highly heterogeneous structures compared to the Born approximation and provide an effective medium-gradient around the tool. Our method, based on the wavefield approximation, also estimates the error, and hence yields a warning when the method becomes unreliable., Geoscience & Engineering, Civil Engineering and Geosciences

Published
2014
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46. CORRESPONDENCE.

Author

Anderson, M.L., Barrett, C.W., Kopelman, P.G., Southall, David, Stebbens, Valerie, Samuels, Martin, Wailoo, M.P., Petersen, S.A., Gordon, R.R., Engleberts, Adele C., De Jonge, Guus A., Scott, Stephen, Fleming, P.J., Berry, P.J., Gilbert, Ruth, Rudd, P., Stewart, Alison, and Hall, Elizqabeth

Subjects
MEDICAL practice, LIVER diseases, GENERAL practitioners
Abstract

Presents several correspondence column relating to medicine practice in Great Britain. Prediction of bleeding risk in liver disease; Competence for general practice surgery; Methemoglobinemia in children treated with prilocaine-lignocaine.

Published
1990

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