129 research outputs found

    Measurement of the B0-anti-B0-Oscillation Frequency with Inclusive Dilepton Events

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    The B0B^0-Bˉ0\bar B^0 oscillation frequency has been measured with a sample of 23 million \B\bar B pairs collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we select events in which both B mesons decay semileptonically and use the charge of the leptons to identify the flavor of each B meson. A simultaneous fit to the decay time difference distributions for opposite- and same-sign dilepton events gives Δmd=0.493±0.012(stat)±0.009(syst)\Delta m_d = 0.493 \pm 0.012{(stat)}\pm 0.009{(syst)} ps1^{-1}.Comment: 7 pages, 1 figure, submitted to Physical Review Letter

    Measurement of the CP-Violating Asymmetry Amplitude sin2β\beta

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    We present results on time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 88 million Y(4S) --> B Bbar decays collected between 1999 and 2002 with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We study events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B0 or B0bar from its decay products. The amplitude of the CP-violating asymmetry, which in the Standard Model is proportional to sin2beta, is derived from the decay-time distributions in such events. We measure sin2beta = 0.741 +/- 0.067 (stat) +/- 0.033 (syst) and |lambda| = 0.948 +/- 0.051 (stat) +/- 0.017 (syst). The magnitude of lambda is consistent with unity, in agreement with the Standard Model expectation of no direct CP violation in these modes

    The Physics of the B Factories

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    Rising rural body-mass index is the main driver of the global obesity epidemic in adults

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    Body-mass index (BMI) has increased steadily in most countries in parallel with a rise in the proportion of the population who live in cities 1,2 . This has led to a widely reported view that urbanization is one of the most important drivers of the global rise in obesity 3�6 . Here we use 2,009 population-based studies, with measurements of height and weight in more than 112 million adults, to report national, regional and global trends in mean BMI segregated by place of residence (a rural or urban area) from 1985 to 2017. We show that, contrary to the dominant paradigm, more than 55 of the global rise in mean BMI from 1985 to 2017�and more than 80 in some low- and middle-income regions�was due to increases in BMI in rural areas. This large contribution stems from the fact that, with the exception of women in sub-Saharan Africa, BMI is increasing at the same rate or faster in rural areas than in cities in low- and middle-income regions. These trends have in turn resulted in a closing�and in some countries reversal�of the gap in BMI between urban and rural areas in low- and middle-income countries, especially for women. In high-income and industrialized countries, we noted a persistently higher rural BMI, especially for women. There is an urgent need for an integrated approach to rural nutrition that enhances financial and physical access to healthy foods, to avoid replacing the rural undernutrition disadvantage in poor countries with a more general malnutrition disadvantage that entails excessive consumption of low-quality calories. © 2019, The Author(s)

    Identification of stable fly attractant compounds in vinasse, a byproduct of sugarcane–ethanol distillation

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    The stable fly, Stomoxys calcitrans (Diptera: Muscidae), is a worldwide pest of livestock. Recent outbreaks of stable flies in sugarcane fields in Brazil have become a serious problem for livestock producers. Larvae and pupae found inside sugarcane stems after harvesting may indicate that stable flies use these stems as potential oviposition or larval development sites. Field observations suggest that outbreaks of stable flies are associated with the vinasse and filter cake derived from biomass distillation in sugarcane ethanol production that are used as fertilizers in sugarcane fields. Adult stable flies are attracted to vinasse, which appears to present an ideal larval development site. The primary goal of the present study is to demonstrate the role of vinasse in influencing the sensory physiological and behavioural responses of stable flies, and to identify its associated volatile attractant compounds. Both laboratory and field studies showed that vinasse is extremely attractive to adult stable flies. Chemical analyses of volatiles collected revealed a wide range of carboxylic acids, alcohols, phenols and aldehydes as potential attractant compounds. These newly identified attractants could be used to develop a tool for the attractant-baited mass trapping of stable flies in order to reduce infestations

    Un contexto interdisciplinario TIC para el desarrollo de un programa de Inteligencia Emocional en Educación Superior

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    El presente Programa de Inteligencia Emocional ha sido implementado en el Grado de Magisterio de la Universidad de Alicante con el fin de capacitar a los estudiantes universitarios para que realicen un trabajo eficiente en diferentes contextos una vez egresen de las aulas; para adaptarse a los cambios sociales, culturales, científicos, tecnológicos y educativos y para mejorar sus habilidades emocionales. La Inteligencia Emocional implica dos competencias importantes para lograr el éxito: (1) la capacidad de reconocer las emociones propias y ajenas; así como (2) la capacidad de utilizar esa información para resolver conflictos y mejorar las interacciones con otras personas. Los resultados mostraron que enseñar habilidades de Inteligencia Emocional en un contexto interdisciplinario de TIC es una forma de mejorar la calidad de la enseñanza y el compromiso de los estudiantes en el marco de la Educación Superior. De esta manera, estamos tratando de mantener y mejorar la calidad de la Educación Superior a un alto nivel al tiempo que actuamos como una fuerza motriz importante para garantizar la calidad y las buenas prácticas en la formación de Inteligencia Emocional. En conclusión, este proyecto, está diseñado para explicar cómo la enseñanza de la Inteligencia Emocional en un contexto interdisciplinar de TIC como pilar para una formación esencial en actitudes y valores con los que analizar y evaluar situaciones, encontrar información y tomar decisiones emocionales

    Un contexto interdisciplinario TIC para el desarrollo de un programa de Inteligencia Emocional en Educación Superior

    No full text
    El presente Programa de Inteligencia Emocional ha sido implementado en el Grado de Magisterio de la Universidad de Alicante con el fin de capacitar a los estudiantes universitarios para que realicen un trabajo eficiente en diferentes contextos una vez egresen de las aulas; para adaptarse a los cambios sociales, culturales, científicos, tecnológicos y educativos y para mejorar sus habilidades emocionales. La Inteligencia Emocional implica dos competencias importantes para lograr el éxito: (1) la capacidad de reconocer las emociones propias y ajenas; así como (2) la capacidad de utilizar esa información para resolver conflictos y mejorar las interacciones con otras personas. Los resultados mostraron que enseñar habilidades de Inteligencia Emocional en un contexto interdisciplinario de TIC es una forma de mejorar la calidad de la enseñanza y el compromiso de los estudiantes en el marco de la Educación Superior. De esta manera, estamos tratando de mantener y mejorar la calidad de la Educación Superior a un alto nivel al tiempo que actuamos como una fuerza motriz importante para garantizar la calidad y las buenas prácticas en la formación de Inteligencia Emocional. En conclusión, este proyecto, está diseñado para explicar cómo la enseñanza de la Inteligencia Emocional en un contexto interdisciplinar de TIC como pilar para una formación esencial en actitudes y valores con los que analizar y evaluar situaciones, encontrar información y tomar decisiones emocionales
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