5,417 research outputs found
Dental Caries, and Supragingival Plaque and Calculus among Students, Tanga, Tanzania.
The prevalence of dental caries and supragingival plaque and calculus in 785 secondary schools students was assessed. More than half (53.6%) of the students were caries-free, and the majority of those with dental caries experience were aged 14-17 (68.1%) and females (53%). Mean DMFT was 1.26, with mean D-component of 1.05, and molars were most affected. Most students had supragingival plaque (74%) and calculus (56.9%) and more so in males than females (P > 0.05). Less than half of the students had experience of dental caries and those with caries were mostly females and of the younger age group. The low DMFT was contributed to the D-component, and molars were the tooth type most affected.The majority of students had supra-gingival plaque and calculus and more so in males than females
A Note on Tachyon Moduli and Closed Strings
The collective behavior of the SL(2,R) covariant brane states of non-critical
c=1 string theory found in a previous work, is studied in the Fermi liquid
approximation. It is found that such states mimick the coset WZW model, whereas
only by further restrictions one recovers the double-scaling limit which was
purported to be equivalent to closed string models. Another limit is proposed,
inspired by the tachyon condensation ideas, where the spectrum is the same of
two-dimensional string theory. We close by noting some strange connections
between vacuum states of the theory in their different interpretations.Comment: PDFLaTeX, 17 pages, 2 figures; Section 2 rewritten, several fixes
throughout the text to improve clarit
Identificação de proteĂnas que interagem com o fator de elongação EF1 alfa no endosperma do grĂŁo do milho.
bitstream/item/68614/1/ct-193.pd
Tunable pinning of a superconducting vortex a by a magnetic vortex
The interaction between a straight vortex line in a superconducting film and
a soft magnetic nanodisk in the magnetic vortex state in the presence of a
magnetic field applied parallel to the film surfaces is studied theoretically.
The superconductor is described by London theory and the nanodisk by the
Landau-Lifshitz continuum theory of magnetism, using the approximation known as
the rigid vortex model. Pinning of the vortex line by the nanodisk is found to
result, predominantly, from the interaction between the vortex line and the
changes in the nanodisk magnetization induced by the magnetic field of the
vortex line and applied field. In the context of the rigid vortex model, these
changes result from the displacement of the magnetic vortex. This displacement
is calculated analytically by minimizing the energy, and the pinning potential
is obtained. The applied field can tune the pinning potential by controlling
the displacement of the magnetic vortex. The nanodisk magnetization curve is
predicted to change in the presence of the vortex lineComment: 9 pages, 8 figures. Submitted to Phys. Rev.
Multilevel Metallization at RIT
This project was a preliminary study of an aluminum/dielectric/aluminum multilayer metallizatiOn scheme. Polyimide and spin on glass were compared using high frequency CV analysis on fabricated capacitors. The simple processing involved showed that good crack-free and adhesive fil s could be formed with both materials although the polyimide was the more ideal CV characteristics. Test masks were generated to measure via resistance and dielectric breakdown in a bi-level structure. The Spin on Glass processing was unsuccessful because of underetching of vias. The polyimide processing was successful displaying good breakdown characteristics but high via resistances
Decifrando o genoma em grande escala.
A determinação das funções gĂŞni~~stem de~andado um grande avanço das ciĂŞncias genĂ´micas, cujas tecnologias concentram-se, principalmente, na geração e no estudo de uma grande quantidade de dados. O ponto de apoio para o entendimento da função gĂŞnica e da estrutura do genoĂna tem sido o sequenciamento de genomas completos e do genoma expresso em grande escala. Mapas fĂsicos e genĂ©ticos tĂŞm sido integrados com informações genĂ´rnicas e de expressĂŁo, resultando em bancos de dados pĂşblicos altamente informativos para diferentes espĂ©cies animais evegetais. Tais informações auxiliam em vários aspectos a análise·de expressĂŁo gĂŞnica, a determinação dos efeitos de processamento de Ă©xons.e do nĂşmero de cĂłpias gĂŞnicas e cromossĂ´micas, culminando na determinação das funções biolĂłgicas e do mecanismo de ação de vários genes. SĂŁo descritos o surgimento de novas tecnologias e a evolução de algumas inovações já existentes, voltadas para a identificação de funções gĂŞnicas
- …