Solvable Leibniz Algebras with Filiform Nilradical

In this paper we continue the description of solvable Leibniz algebras whose nilradical is a filiform algebra. In fact, solvable Leibniz algebras whose nilradical is a naturally graded filiform Leibniz algebra are described in [6] and [8]. Here we extend the description to solvable Leibniz algebras whose nilradical is a filiform algebra. We establish that solvable Leibniz algebras with filiform Lie nilradical are Lie algebras.Ministerio de Economía y Competitividad MTM2013-43687-

The success factors for SMEs: Empirical evidence

This paper empirically analyzes the success factors for SMEs. Particularly, the paper intends to analyze if firm age, human resource costs, debt, venture capital funding, investment in innovation and productivity are success factors for SMEs. The effects were tested using static and dynamic panel data, on a data set of 200 Portuguese SMEs. The use of dynamic panel data is important in order to control for: endogeneity; time-invariant characteristics; possible collinearity between independent variables; effects from possible omission of independent variables; elimination of non-observable individual effects; and, the correct estimation of the relationship between the dependent variable in the previous and current periods. Our results reveal a positive impact on success of: human resource costs; investments in innovation; productivity; and, venture capital funding. We also confirm the negative impact of firm age and debt. Also, the results show evidence of persistence in success for the case of one of the success proxies used

Solvable Leibniz algebras with NFn⊕ F1m nilradical

All finite-dimensional solvable Leibniz algebras L, having N = NFn⊕ F1m as the nilradical and the dimension of L equal to n+m+3 (the maximal dimension) are described. NFn and F1m are the null-filiform and naturally graded filiform Leibniz algebras of dimensions n and m, respectively. Moreover, we show that these algebras are rigid

Perspectiva da fruticultura na Amazônia: uma análise macro.

O impacto mais visível da questão ambiental na Amazônia desencadeado pós-assassinato de Chico Mendes, em 1988, foi dar visibilidade a frutas amazônicas como açaí, cupuaçu, bacuri, pupunha, taperebá, tucumã, uxi, bacaba, que antes tinha consumo local e restrito a época da safra de 3 a 4 meses. Com o crescimento do mercado foram aperfeiçoadas as técnicas de beneficiamento e armazenamento, fazendo com que o consumo seja efetuado durante o ano, além do crescimento do mercado local e a entrada no mercado nacional e internacional. Outras frutas cultivadas no país, também, tiveram grande crescimento como abacaxi, laranja, banana, maracujá, acerola, entre as principai

A mitotic kinase scaffold depleted in testicular seminomas impacts spindle orientation in germ line stem cells.

Correct orientation of the mitotic spindle in stem cells underlies organogenesis. Spindle abnormalities correlate with cancer progression in germ line-derived tumors. We discover a macromolecular complex between the scaffolding protein Gravin/AKAP12 and the mitotic kinases, Aurora A and Plk1, that is down regulated in human seminoma. Depletion of Gravin correlates with an increased mitotic index and disorganization of seminiferous tubules. Biochemical, super-resolution imaging, and enzymology approaches establish that this Gravin scaffold accumulates at the mother spindle pole during metaphase. Manipulating elements of the Gravin-Aurora A-Plk1 axis prompts mitotic delay and prevents appropriate assembly of astral microtubules to promote spindle misorientation. These pathological responses are conserved in seminiferous tubules from Gravin(-/-) mice where an overabundance of Oct3/4 positive germ line stem cells displays randomized orientation of mitotic spindles. Thus, we propose that Gravin-mediated recruitment of Aurora A and Plk1 to the mother (oldest) spindle pole contributes to the fidelity of symmetric cell division

Baroclinic Effects and Tides on the Cape Hatteras Continental Shelf

Seasonal variability has been identified on the shelf near Cape Hatteras in the semidiurnal and diurnal frequency bands. Large summertime semidiurnal currents appear to be an M2 internal tide whose propagation shoreward is supported by strong Middle Atlantic Bight (MAB) seasonal stratification. At the southern limit of the MAB, strong MAB stratification gives way to weaker seasonal stratification in the South Atlantic Bight (SAB), and the M2 internal tide propagates shoreward less effectively. Strong diurnal variability appears in K1 and O1 components in summer, achieving magnitudes as large as the M2. The diurnal components are typically much smaller than M2 in winter. However, this summer signal is unlikely to be a diurnal internal tide since at these latitudes (34.5-36.5N) the diurnal frequency is subinertial. Coastally trapped waves (CTWs) are presented as a mechanism to explain the increased variability in the diurnal band under summertime stratification. Alongshore southward propagation of the diurnal variability is evident from moorings on the middle and outer shelf ( phase speed of 2.1-2.6 m/s along the 60-m isobath) as far south as Cape Hatteras, but little energy in this band propagates past Cape Hatteras. While diurnal band CTW propagation will not occur at this latitude under well-mixed conditions, stratification could cause those frequencies to become available for a given wave number, as described in the work of Brink ( 1990). Estimates of the Huthnance ( 1978) stratification and slope parameter A, and the Burger number S, suggest the summertime diurnal signal is consistent with baroclinic CTWs. If so, these are the first observations of diurnal CTWs at Cape Hatteras. Copyright 2007 by the American Geophysical Union

Morfologia externa das ninfas e adultos de Ctenarytaina spatulata Taylor (Hemiptera, Psyllidae).

Morfologia externa das ninfas e adultos de Ctenarytaina spatulata Taylor (Hemiptera, Psyllidae). Ctenarytaina spatulata Taylor, 1997 foi introduzida no Brasil na década de 1990 em plantios de eucalipto. Devido a importância de C. spatulata como praga de eucalipto, o objetivo desta pesquisa foi estudar a morfologia externa do adulto e das ninfas, com detalhamento da ninfa de 5o ínstar. Foram observadas diferenças marcantes entre os ínstares, principalmente quanto ao tamanho e os caracteres das antenas, das pernas e do ápice do abdômen. A morfologia externa dos adultos foi apresentada com detalhamento da venação, das características das pernas e da terminália