5,247 research outputs found
Means for growing ribbon crystals without subjecting the crystals to thermal shock-induced strains
A susceptor particularly suited for use in growing a ribbon crystal employing edge defined film fed growth techniques is described. The susceptor includes a die through which a melt is drawn for forming a crystal ribbon. This is combined with a coolant delivery system characterized by a pair of jets for directing a stream of fluid coolant along a path extended to impinge on the susceptor in close proximity with the die in nonincident relation with the crystal being grown
Regulation of Nuclear Waste and Reactor Safety within the Commonwealth of Independent States: Toward a Workable Model
Regulation of Nuclear Waste and Reactor Safety within the Commonwealth of Independent States: Toward a Workable Model
The Same but Different—Researching Language and Culture in the Lives of Polish People in England
This article is concerned with issues of representation within cross language research. We examine research that suggests people may present themselves differently in different languages. Moreover, it has been argued that translators/researchers produce accounts of people's lives rather than just describe them within their translations. These representational moves by both research participants and researchers across languages have consequences for research findings. We illustrate our arguments in relation to research with Polish speakers in Greater Manchester, England and argue for issues of interpretation and translation within narrative research to move out of methodological notes to become central concerns within research processes. We argue particularly against the treatment of language as an undifferentiated medium and the view that anyone who can speak a language can unproblematically represent all speakers of that language. All languages are internally differentiated and who translates influences the findings.
URN: urn:nbn:de:0114-fqs090131
Does Beta-Carotene Prevent Cancer? A Critical Appraisal
The possible role of beta-carotene as a protective
nutrient against cancer is reviewed. Human prospective
and retrospective studies strongly indicate that
beta-carotene protects against lung cancer and probably
against stomach cancer. It may also be protective
against cancer of the ovary, cervix, breast and other
cancers, but not the colon or rectum. The protective
factor appears to be beta-carotene itself, rather than
total vitamin A.. Experiments using a variety of animal
models also show that beta-carotene is anticarcinogenic
and appears to act at several stages of
the process. Possible mechanisms of action are
discussed, namely that it must first be converted to
vitamin A, that it alters carcinogen metabolism, that
it is an anti-oxidant and that it enhances the immune
defenses
Raman signatures of classical and quantum phases in coupled dots: A theoretical prediction
We study electron molecules in realistic vertically coupled quantum dots in a
strong magnetic field. Computing the energy spectrum, pair correlation
functions, and dynamical form factor as a function of inter-dot coupling via
diagonalization of the many-body Hamiltonian, we identify structural
transitions between different phases, some of which do not have a classical
counterpart. The calculated Raman cross section shows how such phases can be
experimentally singled out.Comment: 9 pages, 2 postscript figures, 1 colour postscript figure, Latex 2e,
Europhysics Letters style and epsfig macros. Submitted to Europhysics Letter
Viscoelastic properties of human and bovine articular cartilage : a comparison of frequency-dependent trends
Acknowledgments The authors would like to thank Spencer C. Barnes and Hamid Sadeghi for assistance during experimentation. We would also like to thank patients donating tissue and the surgeons collecting these. Funding The equipment used in this study was funded by Arthritis Research UK (Grant number H0671). We are grateful to Arthritis Research UK for the award of a PhD studentship to Anna A. Cederlund (Grant number 19971). Arthritis Research UK had no role in the design of the study and collection, analysis and interpretation of data and in writing the manuscript.Peer reviewedPublisher PD
- …