5,192 research outputs found
Smale flows on
In this paper, we use abstract Lyapunov graphs as a combinatorial tool to
obtain a complete classification of Smale flows on
. This classification gives necessary and
sufficient conditions that must be satisfied by an abstract Lyapunov graph in
order for it to be associated to a Smale flow on
Are Public Banks pro-Competitive? Evidence from Concentrated Local Markets in Brazil
We measure the competitive effect of public ownership of banks in concentrated local banking markets in Brazil by extending Bresnahan and Reissâs [1991] framework to measure the effects of entry in concentrated markets. We use variation in market size, the number of competitors and their identity to infer how conduct is affected by the entry of a private vis-Ă -vis a public bank. We find that, while local markets whose structure is private bank duopoly are 100% larger than private monopolies, duopolies with one public and one private bank and private monopolies are no different with respect to market size. These results suggest that, while the presence of private banks toughens competition, public banks do not affect conduct.banking industry; public versus private ownership; effect of entry.
AnĂĄlise de resĂduos organofosforados em Ăłleos essenciais cĂtricos brasileiros utilizando CG-EM-MSI.
AnĂĄlise de resĂduos organoclorados em Ăłleos essenciais cĂtricos brasileiros utilizando CG-EM-MSI.
Spectral Engineering with Coupled Microcavities: Active Control of Resonant Mode-Splitting
Optical mode-splitting is an efficient tool to shape and fine-tune the
spectral response of resonant nanophotonic devices. The active control of
mode-splitting, however, is either small or accompanied by undesired resonance
shifts, often much larger than the resonance-splitting. We report a control
mechanism that enables reconfigurable and widely tunable mode-splitting while
efficiently mitigating undesired resonance shifts. This is achieved by actively
controlling the excitation of counter-traveling modes in coupled resonators.
The transition from a large splitting (80 GHz) to a single-notch resonance is
demonstrated using low power microheaters (35 mW). We show that the spurious
resonance-shift in our device is only limited by thermal crosstalk and
resonance-shift-free splitting control may be achieved.Comment: 4 pages, 3 figure
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