8,143 research outputs found
The structure of the QED-Vacuum and Electron-Positron Pair Production in Super-Intense, pulsed Laser Fields
We discuss electron-positron pair-production by super-intense, short laser
pulses off the physical vacuum state locally deformed by (stripped) nuclei with
large nuclear charges. Consequences of non-perturbative vacuum polarisation
resulting from such a deformation are shortly broached. Production
probabilities per pulse are calculated.Comment: 10 pages, 1 figure, submitted to Journal of Physics
Spectrum: v. 2, no. 1-3
Spectrum was a newsletter for students, faculty, staff and alumni of the Henry M. Goldman School of Dental Medicine, published from 1983-1992
Histological investigations on the thyroid glands of marine mammals (Phoca vitulina, Phocoena phocoena) and the possible implications of marine pollution
In 1988 and 1989, thousands of harbor seals (Phoca vitulina) died in the North Sea from phocine distemper infection. The morphology of thyroid glands from 40 harbor seals found dead on the North Sea coastlines of Schleswig-Holstein, Federal Republic of Germany, during an epizootic of phocine distemper, was compared with the morphology of thyroid glands from five healthy harbor seals collected in Iceland. Thyroid glands from seven harbor porpoises (Phocoena phocoena) found dead in 1990 on the North Sea coastlines also were evaluated. Colloid depletion and fibrosis were found in the thyroid glands of harbor seals which died during the epizootic, but not in animals from Iceland. Thyroid glands of the porpoises showed similar lesions, but to a lesser degree, than those observed in the North Sea seals
Spartan Daily, November 28, 2001
Volume 117, Issue 60https://scholarworks.sjsu.edu/spartandaily/9765/thumbnail.jp
An Update on Models of Neutrino Masses and Mixings
At the School I gave three lectures on neutrino masses and mixings. Much of
the material covered in my first two lectures is written down in a review on
the subject that I published not long ago with F. Feruglio \cite{rev}. Here, I
make a relatively short summary (with updates) of the content of my first two
lectures, referring to our review for a more detailed presentation, and then I
expand on the content of the third lecture which was dedicated to recent work
on A4 models of tri-bimaximal neutrino mixing which were not covered in the
review.Comment: Lectures given at IPM-LHP06, Tehran, Iran; PSN: IPM-LHP06-sch. 14
pages, 1 figure Typos corrected, one reference adde
Physical Activity, Overweight and Obesity Among Latino Youth
Highlights rates of physical activity and overweight and obesity among Latino youth compared with other groups; the role of environmental, socioeconomic, and cultural factors; and policy implications and interventions for increasing physical activity
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