Spatio-temporal conjecture for diffusion

We present here a conjecture about the equivalence between the noise density of states of a system governed by a generalized Langevin equation and the fluctuation in the energy density of states in a Hamiltonian system. We present evidence of this for a disordered Heisenberg system.Comment: 6 pages, 1 figure. Submitted to Physica

Compatibilidade necessária.

Compatilizar o emprego dos controles químico e biológico contra pragas em tomateiro é um desafio que se reveste de grande importânica por auxiliar a garantir a sustentabilidade da cultura e favorecer o manejo integrado de insetos. É o caso de uso do parasitoide Trichogramma pretiosum, com ação no combate a Tuta absoluta, brocas pequena e grande, diferentes espécies de Spodoptera e Helicoverpa armigera, o que demanda a utilização de inseticidas seletivos.bitstream/item/108822/1/Compatibilidade-necessaria.pd

Bloch-like oscillations in a one-dimensional lattice with long-range correlated disorder

We study the dynamics of an electron subjected to a uniform electric field within a tight-binding model with long-range-correlated diagonal disorder. The random distribution of site energies is assumed to have a power spectrum $S(k) \sim 1/k^{\alpha}$ with $\alpha > 0$. Moura and Lyra [Phys. Rev. Lett. {\bf 81}, 3735 (1998)] predicted that this model supports a phase of delocalized states at the band center, separated from localized states by two mobility edges, provided $\alpha > 2$. We find clear signatures of Bloch-like oscillations of an initial Gaussian wave packet between the two mobility edges and determine the bandwidth of extended states, in perfect agreement with the zero-field prediction.Comment: 4 pages, 5 figure

Seletividade de compostos usados em frutiferas temperadas a crisopídeos.

SICONBIOL 2011, Resumo 35934

Superdiffusive Conduction: AC Conductivity with Correlated Noise

We present evidence of the existence of a superdiffusive regime in systems with correlated disorder for which localization is suppressed. An expression for anomalous electrical conductivity at low frequencies is found by using a generalized Langevin equation whose memory function accounts for the interactions between the carriers. New mechanisms inducing a superdiffusive conductivity are discussed and experimental possibilities for observing that phenomenon in nanotubes and superlattices are presented.Comment: 7 pages, no figure

UNDERSTANDING THE RELATIONSHIP BETWEEN PRODUCT SPECIFICATIONS AND COORDINATION IN AGRI-BUSINESS SUPPLY CHAINS: AN EXAMINATION OF THE NEW ZEALAND MEAT INDUSTRY

Two phenomena are occurring simultaneously within the agribusiness sector: customers are requiring tighter product specifications and agricultural chains are becoming more coordinated. However, the exact relationship between these two phenomena is not clear. This research explores that relationship. Five New Zealand fresh meat chains were the focus of multiple case-study research, which used a chain-level (multi-dyadic) approach. Chains were assessed as to the nature of product specifications demanded at the end-customer level, as well as to the nature of inter-firm relationships. Interestingly, tighter product specifications in themselves do not lead to more coordinated chains; coordination seems to be linked to the level of effort required to meet product specifications.Industrial Organization, Livestock Production/Industries,