155 research outputs found

    Sustained state-independent quantum contextual correlations from a single ion

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    We use a single trapped-ion qutrit to demonstrate the quantum-state-independent violation of noncontextuality inequalities using a sequence of randomly chosen quantum nondemolition projective measurements. We concatenate 53 × 106 sequential measurements of 13 observables, and unambiguously violate an optimal noncontextual bound. We use the same data set to characterize imperfections including signaling and repeatability of the measurements. The experimental sequence was generated in real time with a quantum random number generator integrated into our control system to select the subsequent observable with a latency below 50 μs, which can be used to constrain contextual hiddenvariable models that might describe our results. The state-recycling experimental procedure is resilient to noise and independent of the qutrit state, substantiating the fact that the contextual nature of quantum physics is connected to measurements and not necessarily to designated states. The use of extended sequences of quantum nondemolition measurements finds applications in the fields of sensing and quantum information

    Effects of the Behavior of two natural enemies to reduce populations of (heliothis zea) in the Corn Corn crop

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    La presencia de plagas en el cultivo del Maíz en su etapa de choclo ha causado pérdidas económicas en el Perú. El estudio surge como objetivo: Evaluar la efectividad de dos predadores en estudio en control de Heliothis zea. en el cultivo de maíz, comparar la efectividad de dos enemigos naturales del Heliothis zea; Para ello se seleccionaron tres lotes de maíz variedad San Jerónimo, en etapas de floración, maduración para evaluar porcentajes de predacion de insectos en estudio fenológicas, Las observaciones en campo se realizó cada 10 días, teniendo presencia de predadores de Orius insidiosus (Hemiptera: Anthocoridae). Los estados inmaduros del mazorquero (Heliothis zea). Se evaluaron en tres etapas floración, fructificación y maduración. Los resultados encontrados de predacion Coleomegilla maculata y Orius insidiosus, La etapa de floración el C. maculata tiene un 13.71 % en los diferentes estados del Heliothis zea, siendo menor porcentaje 12.71 % de Orius insidiosus esto se debe a que C. maculata tiene mayor actividad en estadios larvales, La etapa de maduración C. maculata alcanza 24.71 % y Orius insidiosus 26.71%. El porcentaje de predacion de insectos en estudio mostraron mayor actividad predatora el Orius insidiosus, C. maculata y Orius insidiosus en la etapa de floración del cultivo de maíz.The presence of pests in the cultivation of maize in its choclo stage has caused economic losses in Peru. The study aims to: Evaluate the effectiveness of two predators under study in control of Heliothis zea. in maize cultivation, compare the effectiveness of two natural enemies of Heliothis zea; For this purpose, three batches of maize variety Saint Jerome were selected, in flowering stages, maturation to evaluate percentages of predation of insects in phenological study, Observations in the field was made every 10 days, having the presence of predators of Orius insidiosus (Hemiptera: Anthocoridae). The immature states of the mazorquero (Heliothis zea). They were evaluated in three stages flowering, fruiting and maturation. The results found from predation Coleomegilla maculata and Orius insidiosus, the flowering stage C. maculata has 13.71 % in the different states of Heliothis zea, being less percentage 12.71 % of Orius insidiosus this is because C. maculata has greater activity in larval stages, the maturation stage C. maculata reaches 24.71 % and Orius insidiosus 26.71%. The percentage of predation of insects under study showed increased predatory activity in Orius insidiosus, C. maculata and Orius insidiosus at the flowering stage of maize cultivation

    A role for core planar polarity proteins in cell contact-mediated orientation of planar cell division across the mammalian embryonic skin

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    Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. © The Author(s) 2017. Supplementary information accompanies this paper at doi:10.1038/s41598-017-01971-2.The question of how cell division orientation is determined is fundamentally important for understanding tissue and organ shape in both healthy or disease conditions. Here we provide evidence for cell contact-dependent orientation of planar cell division in the mammalian embryonic skin. We propose a model where the core planar polarity proteins Celsr1 and Frizzled-6 (Fz6) communicate the long axis orientation of interphase basal cells to neighbouring basal mitoses so that they align their horizontal division plane along the same axis. The underlying mechanism requires a direct, cell surface, planar polarised cue, which we posit depends upon variant post-translational forms of Celsr1 protein coupled to Fz6. Our hypothesis has parallels with contact-mediated division orientation in early C. elegans embryos suggesting functional conservation between the adhesion-GPCRs Celsr1 and Latrophilin-1. We propose that linking planar cell division plane with interphase neighbour long axis geometry reinforces axial bias in skin spreading around the mouse embryo body.Peer reviewe
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