7,564 research outputs found
New family of potentials with analytical twiston-like solutions
In this letter we present a new approach to find analytical twiston models.
The effective two-field model was constructed by a non-trivial combination of
two one field systems. In such an approach we successfully build analytical
models which are satisfied by a combination of two defect-like solutions, where
one is responsible to twist the molecular chain by , while the other
implies in a longitudinal movement. Such a longitudinal movement can be fitted
to have the size of the distance between adjacent molecular groups. The
procedure works nicely and can be used to describe the dynamics of several
other molecular chains.Comment: 7 pages, 3 figure
Metodologias de laboratório para compactação de solos para análise de desenvolvimento de plantas.
Equipamentos utilizados; Solos; Ensaios.bitstream/CPPSE/17483/1/Documentos-74.pdfISSN 1980-684
Comparação dos níveis de ácido cianídrico (HCN) entre etnovariedades de mandiocas bravas e mansas.
Disponível também on-line. Publicado também no Anais do XII Congresso Brasileiro da Mandioca, Paranavaí, 2007
Two Experimental Approaches of Looking at Buoyancy
In our teaching practice, we find that a large number of first-year university physics and chemistry students exhibit some difficulties with applying Newton's third law to fluids because they think fluids do not react to forces. (c) 2013 American Association of Physics Teachers
Melhoria dos canais de comunicação da cadeia de suprimentos no setor de patrimônio e materiais (SPM) da Embrapa Florestas.
bitstream/item/25633/1/186-10.pd
Universal reduction of pressure between charged surfaces by long-wavelength surface charge modulation
We predict theoretically that long-wavelength surface charge modulations
universally reduce the pressure between the charged surfaces with counterions
compared with the case of uniformly charged surfaces with the same average
surface charge density. The physical origin of this effect is the fact that
surface charge modulations always lead to enhanced counterion localization near
the surfaces, and hence, fewer charges at the midplane. We confirm the last
prediction with Monte Carlo simulations.Comment: 8 pages 1 figure, Europhys. Lett., in pres
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