Results 51 to 60 of about 3,057,322 (296)
Triviality of Higher Derivative Theories [PDF]
, 2003 We show that some higher derivative theories have a BRST symmetry. This symmetry is due to the higher derivative structure and is not associated to any gauge invariance.
Accioly +39 more
core +2 more sources
Network topology drives population temporal variability in experimental habitat networks
Population Ecology, EarlyView.Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu +3 more
wiley +1 more source
Analysis about the treatment of derivative in the textbook of higher education
Educação Matemática Debate, 2018 This article arose from some concern, mainly from practice to teaching the discipline Differential and Integral Calculus in the Engineering course, especially the derivative, high failure rate and non-association (by the students) of the meaning of the ...
Rogério dos Santos Lobo
doaj +1 more source
Geographic variation in walking activity in the red flour beetle Tribolium castaneum
Population Ecology, EarlyView.This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley +1 more source
Notion of a virtual derivative
, 2011 Diagrams as a graphic expresion of derivatives is proposed for calculation of derivatives for composed function. The concret diagram is understood as a virtual derivative in contrast of concret derivative. In polynomial expression of functions derivative
Valiukevicius, Gintaras
core +1 more source
FROM SCHILLER'S 'TRILL' TO 'OIL' FROM RUSSIAN HYDROCARBONS
Вестник Российского экономического университета имени Г. В. Плеханова, 2017 In conditions of budget deficit and difficulties in capital borrowing on global markets the issue of home borrowing is becoming more and more acute. A derivative profitable both for the government and citizens, who keep their savings in Russian banks ...
Anatoliy I. Vorobiev, Pavel A. Gudkov
doaj +1 more source
Synthesis, Characterization of Some Derivative Piperic Acid, Which Extraction from Black Pepper. [PDF]
Kirkuk Journal of Science, 2012 Piperic acid was extracted from black pepper by ethanol as asolvent, then it reacted with solution of bromine in carbon tetra chloride to make tetra bromine derivative.
Iman A. Yass
doaj +1 more source
Dendritic cells steering antigen and leukocyte traffic in lymph nodes
FEBS Letters, EarlyView.Dendritic cells are key players in the activation of T cells and their commitment to effector function. In this In a Nutshell Review, we will discuss how dendritic cells guide the trafficking of antigen and leukocytes in the lymph node, thus influencing T‐cell activation processes. Dendritic cells (DCs) play a central role in initiating and shaping the
Enrico Dotta +3 more
wiley +1 more source
Geometric partial differentiability on manifolds: the tangential derivative and the chain rule
, 2015 We define the tangential derivative, a notion of directional derivative which is invariant under diffeomorphisms. In particular this derivative is invariant under changes of chart and is thus well-defined for functions defined on a differentiable ...
Convent, Alexandra +1 more
core +1 more source
Derivatives of triangular, Toeplitz, circulant matrices and matrices of other forms over semirings [PDF]
, 2017 In this article we construct examples of derivations in matrix semirings. We study hereditary and inner derivations, derivatives of diagonal, triangular, Toeplitz, circulant matrices and of matrices of other forms and prove theorems for derivatives of matrices of these forms.
arxiv +1 more source