55,606 research outputs found
The effect of growth hormone on the growth of the tibia/fibula complex and femurs of hypophysectomized rats after unilateral limb denervation
Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1972 (Orthodontics)Bibliography included
Tensor networks and the numerical renormalization group
The full-density-matrix numerical renormalization group (NRG) has evolved as
a systematic and transparent setting for the cal- culation of thermodynamical
quantities at arbitrary temperatures within the NRG framework. It directly
evaluates the relevant Lehmann representations based on the complete basis sets
intro- duced by Anders and Schiller (2005). In addition, specific attention is
given to the possible feedback from low energy physics to high energies by the
explicit and careful construction of the full thermal density matrix, naturally
generated over a distribution of energy shells. Specific examples are given in
terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG), Fermi-Golden
rule calculations (fgrNRG), as well as the calculation of plain thermodynamic
expectation values. Furthermore, based on the very fact that, by its iterative
nature, the NRG eigenstates are naturally described in terms of matrix product
states, the language of tensor networks has proven enormously convenient in the
description of the underlying algorithmic procedures. This paper therefore also
provides a detailed introduction and discussion of the prototypical NRG
calculations in terms of their corresponding tensor networks.Comment: 20 pages, 11 figures (adapted from habilitation thesis
On Galois-Division Multiple Access Systems: Figures of Merit and Performance Evaluation
A new approach to multiple access based on finite field transforms is
investigated. These schemes, termed Galois-Division Multiple Access (GDMA),
offer compact bandwidth requirements. A new digital transform, the Finite Field
Hartley Transform (FFHT) requires to deal with fields of characteristic p, p
\neq 2. A binary-to-p-ary (p \neq 2) mapping based on the opportunistic
secondary channel is introduced. This allows the use of GDMA in conjunction
with available digital systems. The performance of GDMA is also evaluated.Comment: 6 pages, 4 figures. In: XIX Simposio Brasileiro de Telecomunicacoes,
2001, Fortaleza, CE, Brazi
Biologia e potencial de Doru luteipes no controle de Spodoptera frugiperda.
0 trabalho foi realizado no Centro Nacional de Pesquisa de Milho c Sorgo (CNPMS), em Sete Lagoas, MG, tendo como objetivo conhecer a biologia e o potencial de Doru luteipes (Scudder, 1876) como predador de ovos e larvas do Spodoptera frugiperda (J.E. Smith, 1797), em condições de laboratório. Estudou-se também, em condições do campo, o efeito do diversos inseticidas sobre o predador. Dos estudos bioecológicos, observou-se que as posturas possuem, em média, 26,6 ovos, e o perÃodo de incubação é do 7,31 dias. A fase ninfal variou de 37,1 a 50,1 dias, conforme o tratamento, e a fase adulta, de 83,2 dias para individuos alimentados com ovos, a 143 dias para individuos alimentados com larvas. 0 inseto mostrou urn bom potencial como predador de S. frugiperda, apresentando um consumo diário na fase ninfal de 12, 10 e 8 larvas, conforme estas foram oferecidas isoladamente, com folhas do milho ou com dieta. Na fase adulta, o consumo foi na mesma sequência da anterior, de 21, 19 e 10 larvas. Com relação aos inseticidas testados, os produtos permethrin, deltamethrin e methomyl foram eficientes no controle de S. frugiperda, e praticamente não afetaram o predador. Com base nos resultados, conclue-se que D. luteipes, em condições do laboratório, apresentou-se eficiente no controle de S. frugiperda e possui grande potencial para utilizado no controle deste inseto em milho, em condições do campo
The CO A-X System for Constraining Cosmological Drift of the Proton-Electron Mass Ratio
The band system of carbon monoxide,
which has been detected in six highly redshifted galaxies (), is
identified as a novel probe method to search for possible variations of the
proton-electron mass ratio () on cosmological time scales. Laboratory
wavelengths of the spectral lines of the A-X (,0) bands for have
been determined at an accuracy of
through VUV Fourier-transform absorption spectroscopy, providing a
comprehensive and accurate zero-redshift data set. For the (0,0) and (1,0)
bands, two-photon Doppler-free laser spectroscopy has been applied at the accuracy level, verifying the absorption data. Sensitivity
coefficients for a varying have been calculated for the CO A-X
bands, so that an operational method results to search for -variation.Comment: 7 pages (main article), 3 figures, includes supplementary materia
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