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

Plano de negócios da Associação dos Produtores Rurais em Manejo Florestal e Agricultura: Apruma.

projeto; Plano de marketing; Plano operacional; Plano ambiental e social; Estudos econômicos e financeiros; Anexosbitstream/CPAF-AC/15623/1/doc102.pd

Multimodal signaling in Boana albopunctata (Anura: Hylidae): reading visual and acoustic cues

Multimodal signaling in Boana albopunctata (Anura: Hylidae): reading visual and acoustic cues. The acoustic mode of communication is important for anurans, but visual communication is beginning to be considered essential for some species, genera, and families. This study focuses on visual and acoustic signals in Boana albopunctata (Hylidae: Cophomantinae) in an attempt to increase our understanding of signaling in this nocturnal Neotropical treefrog. Visual signals were assessed to determine whether they are directed toward conspecific opponents, as has already been observed for some diurnal anurans, or associated with potential morphological asymmetries. Associations between visual and acoustic signals were explored. The results suggest that males may combine visual and acoustic signals (multimodal signaling) synergistically, thereby strengthening the efficiency of information transmission. Thus, in nocturnal anuran species, visual signals may function primarily as an alerting component and multimodal signaling may be a relevant way of communication.Sinalização multimodal em Boana albopunctata (Anura: Hylidae): compreendendo os sinais visuais e acústicos. O modo de comunicação acústico é importante para os anuros, mas a comunicação visual está começando a ser considerada essencial para algumas espécies, gêneros e famílias. Ao investigar sinais visuais e acústicos, o objetivo deste estudo é a melhor compreensão da sinalização em Boana albopunctata (Hylidae: Cophomantinae), uma perereca noturna neotropical. Foi verificado se os sinais visuais são direcionados aos oponentes coespecíficos, como já observado para alguns anuros diurnos, ou se são relacionados a potenciais assimetrias morfológicas. Estudou-se também associações entre sinais visuais e acústicos. Esse estudo leva à compreensão de que os machos podem combinar sinergicamente sinais acústicos e visuais (sinalização multimodal), potencializando assim a eficiência da transmissão de informação. Conclui-se que para espécies noturnas de anuros os sinais visuais podem atuar como componentes de alerta e que a sinalização multimodal pode ser um meio relevante de comunicação

Redesign of machine component in polymeric matrix composite towards increased productivity

This work is focused in the maximization of the acceleration a 2D Industrial Laser Cutting Machine (ILCM). The changes to be implemented are centered in the replacement of a metallic critical component: the gantry. This component largely influences precision and maximum acceleration. Finite Elements Analysis was performed to the current metallic part. From this analysis the maximum allowed deformations were established. A replacement composite component capable of an equally valid behavior was designed in carbon fiber. To establish the maximum increase in acceleration that does not lead to precision losses, the working conditions were simulated and the acceleration to which the component was subjected to was varied. The variation of the thickness of layers with different orientations and locations in the part allowed for the understanding of how the mass varies along with the maximum possible acceleration. This analysis, asides with considering the maximum force allowed by the linear motor that is responsible by the gantry motion, establishes the limit in terms of maximum acceleration of the machine. An increase of 22% in the maximum acceleration while maintaining the precision is possible due to the higher specific rigidity of composite materials and the use of an optimization heuristic

Redesign of an industrial laser cutting machine’s gantry in composite material

This work is focused in the design stage of a composite structure intended to replace a metallic critical component in a 2D Industrial Laser Cutting Machine (ILCM). The component is the gantry, largely responsible for most of the ILCM’s characteristics. These include precision and maximum acceleration, which are critical. The dimensioning of the component is initially performed based on analytical models, but latter stages use the numerical capabilities of Finite Elements Method. In the end it is possible to take advantage of the higher specific rigidity of composite materials to increase the maximum acceleration that the machine allows for while maintaining the precision.(undefined

Gerenciamento de resíduos biológicos de laboratórios: adequação às normas de Boas Práticas Laboratoriais.

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