How to survive earthquakes: the example of Norcia

Trabalho apresentado em International Conference on Earthquake Engineering and Structural Dynamics, 12-14 June 2017, Reykyjavik, IcelandN/

Capacitive Coupling of Two Transmission Line Resonators Mediated by the Phonon Number of a Nanoelectromechanical Oscillator

Detection of quantum features in mechanical systems at the nanoscale constitutes a challenging task, given the weak interaction with other elements and the available technics. Here we describe how the interaction between two monomodal transmission-line resonators (TLRs) mediated by vibrations of a nano-electromechanical oscillator can be described. This scheme is then employed for quantum non-demolition detection of the number of phonons in the nano-electromechanical oscillator through a direct current measurement in the output of one of the TLRs. For that to be possible an undepleted field inside one of the TLR works as a amplifier for the interaction between the mechanical resonator and the remaining TLR. We also show how how the non-classical nature of this system can be used for generation of tripartite entanglement and conditioned mechanical coherent superposition states, which may be further explored for detection processes.Comment: 6 pages, 5 figure

Entrada de nutrientes no solo pela água da chuva, e contribuição no processo da fitomassa aérea de capoeiras de diferente idades.

A entrada de nutrientes pela água da chuva em capoeiras com cinco e onze anos de idade. no nordeste paraense, foi avaliada em duas épocas do ano. A entrada dos nutrientes foi decomposta em: quantidades carreadas pela água da chuva (lNC), interceptação pela vegetação secundária. "throughfall"(THF), "stemflow''(Sf') e a lixiviação {(THF+SF)-( 1.25xINC)} As análises químicas foram obtidas pelos métodos usuais do Institut Iür Bodenkunde und Waldcmãrung. A chuva interna bruta mostrou um acréscimo nas quantidades de K, Na, Ca, Mg, e Si nas duas áreas estudadas, mesmo levando em consideração a concentração relativa causada pela interceptação da fitomassa. O incremento foi atribuído à liberação de nutrientes pelas folhas. às deposições de poeiras e excrementos da fauna entomológica. Da mesma forma, o incremento de S-So.4" e de nitrogênio orgânico, responsável pelo teor deste elemento no sistema, foi atribuído às perdas da vegetação. Com exceção do potássio em uma das épocas de coleta e do sódio. os demais elementos analisados evidenciam maior incremento na chuva interna da capoeira com onze anos mostrando a importância da fitomassa no sistema. A maior quantidade de sódio lixiviado na capoeira com cinco anos foi atribuída a algumas espécies encontradas na área.Editado por J. E. Péfaur

Causas de anestro em bovinos da microrregião de Juiz de Fora- MG.

bitstream/item/81868/1/Causas-de-anestro-em-bovinos.pd

Ultracold heteronuclear molecules and ferroelectric superfluids

We analyze the possibility of a ferroelectric transition in heteronuclear molecules consisting of Bose-Bose, Bose-Fermi or Fermi-Fermi atom pairs. This transition is characterized by the appearance of a spontaneous electric polarization below a critical temperature. We discuss the existence of a ferroelectric Fermi liquid phase for Fermi molecules and the existence of a ferroelectric superfluid phase for Bose molecules characterized by the coexistence of ferroelectric and superfluid orders. Lastly, we propose an experiment to detect ferroelectric correlations through the observation of coherent dipole radiation pulses during time of flight.Comment: 4 pages and 3 figure

Innovative screen-printed electrodes on cork composite substrates applied to sulfadiazine electrochemical sensing

Supplementary data to this article can be found online at https://doi.org/10.1016/j.jelechem.2020.114922.This work reports the first use of cork as substrate to produce 3-electrode electrochemical devices, which may be very important to conduct sustainable worldwide biochemical testing in point-of-care. It consists of laminated cork covered by a thin-film of an insulating resin and printed in a 3-electrode system format. Silver ink was used to print electrical tracks and the reference electrode, while carbon ink was used to print working and auxiliary electrodes. The analytical performance of the cork-based devices was and compared to other common supports, as PET and ceramics in the form of screen-printed electrodes (SPEs). The cork-based devices displayed higher current values and better reversibility features and were able to undergo stable modification with conductive nanomaterials. They were further applied to detect sulfadiazine (SDZ), an antibiotic of human use that is also an environmental contaminant, by modifying the working electrode with a molecularly imprinted polymer (MIP) layer obtained by electropolymerization of pyrrol. The results confirmed the ability of the MIP film to detect SDZ selectively and showed reproducible increasing current signals for increasing concentrations of SDZ, from 8.0 to 152.0??M. Direct comparison with commercial carbon SPEs showed greater sensitivity for the cork-based SPEs, with 10× lower limits of detection. Overall, cork-based devices are a valuable alternative to currently available SPEs systems, considering environment and cost features and also the analytical gains of this approach. These are especially important in times where a global biochemical testing became necessary for improved public health management.This work was supported by Fundação para Ciência e a Tecnologia, I.P. and FEDER (European Funding or Regional Development), via COMPETE2020-POCI (operational program for internationalization and competitiveness), through the project PTDC/AAG-TEC/5400/2014, POCI01-0145-FEDER-016637. CeNTI – Centro de Nanotecnologia e Materiais Técnicos, Funcionais e Inteligentes is acknowledged for an initial involving the automated screen-printing and Amorim Cork industries for providing the laminated cork.info:eu-repo/semantics/publishedVersio

Thermodynamically stable noncomposite vortices in mesoscopic two-gap superconductors

In mesoscopic two-gap superconductors with sizes of the order of the coherence length noncomposite vortices are found to be thermodynamically stable in a large domain of the $T - H$ phase diagram. In these phases the vortex cores of one condensate are spatially separated from the other condensate ones, and their respective distributions can adopt distinct symmetries. The appearance of these vortex phases is caused by a non-negligible effect of the boundary of the sample on the superconducting order parameter and represents therefore a genuine mesoscopic effect. For low values of interband Josephson coupling vortex patterns with $L_1 \neq L_2$ can arise in addition to the phases with $L_1 =L_2$, where $L_1$ and $L_2$ are total vorticities in the two condensates. The calculations show that noncomposite vortices could be observed in thin mesoscopic samples of MgB$_{2}$.Comment: 5 pages, 3 figures, to be published in Europhysics Letter

Traditional Cattle Feeding Stuffs: Fatty Acid Profile

Dietary polyunsaturated fatty acids (PUFA) are perceived to be healthier than saturated fatty acids. Therefore, in order to be able to manipulate the fatty acid profile of meat and/or milk, to respond to the consumer demands, knowledge of the fatty acid profile of feeding stuffs for cattle is of major importance (LeDoux et al., 2002; Petit, 2002). In this work a preliminary study was made of the fatty acid profile of the cow\u27s diet in a traditional farm production system