Angular momentum effects in Michelson-Morley type experiments

The effect of the angular momentum density of a gravitational source on the times of flight of light rays in an interferometer is analyzed. The calculation is made imagining that the interferometer is at the equator of the gravity source and, as long as possible, the metric, provided it is stationary and axisymmetric, is not approximated. Finally, in order to evaluate the size of the effect in the case of the Earth a weak field approximation is introduced. For laboratory scales and non-geodesic paths the correction turns out to be comparable with the sensitivity expected in gravitational waves interferometric detectors, whereas it drops under the threshold of detectability when using free (geodesic) light rays.Comment: 12 pages, LaTeX; more about the detection technique, references added; accepted for publication in GR

An integrated Constraint-based, power Aware control system for Autonomous rover Mission operations

This paper aims at describing an integrated power-aware, model-based autonomous control architecture for planetary rover-based mission operations synthesized in the context of a Ph.D. program on the topic "Autonomy for Interplanetary missions" funded and supported by ESA. The proposed controller implements a single Sense-Act-Plan (SPA) closed-execution loop to safely command the robot activities considered in the context of a specific key mission scenario. Both highly decision making capabilities and a flexible execution process are the two key features on which the control system is grounded. Furthermore, target execution capabilities, specially those that allow to flexibly keeping pace with temporal and power-related contingencies that might threaten the whole schedule execution attainment, are demonstrated through the integration with the ESA\u27s 3DROV planetary rover system simulator

Fossilization model for squamastrobus tigrensis foliage in a volcanic-Ash deposit: Implications for preservation and taphonomy (podocarpaceae, lower cretaceous, Argentina)

The present study is a holistic approach to the relationship between volcaniclastic host rock characteristics and the fossilization processes of short leafy coniferous branches of Squamastrobus tigrensis, preserved as fossilized-cuticles (Lower Cretaceous, Baqueró Group, Patagonia, Argentina). The question of diagenetic influences of Aptian volcaniclastic sedimentation on preservation chemistry and taphonomic processes is addressed. Whereas infrared spectroscopy provided chemical information on the leaves, vitrinite reflectance and complementary thermal indicators provided data on the thermal maturity of the dispersed organic matter in the host rock. Three sample types were analyzed: Fossilized-cuticle, macerated fossilized-cuticle (by infrared spectroscopy), and associated organic host rock matter (by light microscopy). Results clearly show chemical variability between, and within the fossilized-cuticle and cuticle, as well as a similarity to type I/II kerogen, i.e., high contents of both aliphatic groups and oxygencontaining compounds. Combined with the lower maturity of the host rock, the importance of the depositional environment during burial and taphonomic conditions that affected the fossilization of S. tigrensis are summarized in a general fossilization model.Fil: Lafuente Diaz, Maiten Amalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: D`angelo, José Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina. Cape Breton University; CanadáFil: del Fueyo, Georgina Marisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: Zodrow, Erwin L.. Cape Breton University; Canad

Role of Circadian Clock on the Pathogenesis and Lifestyle Management in Non-Alcoholic Fatty Liver Disease

Several features of the modern lifestyle, such as weekly schedules or irregular daily eating patterns, have become major drivers of global health problems, including non-alcoholic fatty liver disease (NAFLD). Sleep is an essential component of human well-being, and it has been observed that when circadian rhythms are disrupted, or when sleep quality decreases, an individual’s overall health may worsen. In addition, the discrepancy between the circadian and social clock, due to weekly work/study schedules, is called social jetlag and has also been associated with adverse metabolic profiles. Current management of NAFLD is based on dietary intake and physical activity, with circadian preferences and other environmental factors also needing to be taken into account. In this regard, dietary approaches based on chrononutrition, such as intermittent fasting or time-restricted feeding, have proven to be useful in realigning lifestyle behaviors with circadian biological rhythms. However, more studies are needed to apply these dietary strategies in the treatment of these patients. In this review, we focus on the impact of circadian rhythms and the role of sleep patterns on the pathogenesis and development of NAFLD, as well as the consideration of chrononutrition for the precision nutrition management of patients with NAFLD

Centro residencial asistido para garantizar la calidad de vida del adulto mayor, Santa Maria - Huaura 2023

El proyecto de investigación lleva por título “Centro residencial asistido para garantizar la calidad de vida del adulto mayor, Santa María, Huaura 2023”. Cuyo objetivo principal es brindar al adulto mayor los cuidados y atenciones necesarios que permitan recuperar la calidad de vida del adulto mayor. De esta manera permitirá un correcto envejecimiento, teniendo un efecto positivo en esta última etapa que a todo ser humano le toca vivir. La metodología utilizada en el presente estudio es de tipo cualitativa con la recolección de información y datos obtenidos de estadísticas proporcionadas por (INEI,2022), entrevistas y observación de datos. La presente investigación nos muestra que los centros existentes son casas adaptadas, inadecuadas e insuficientes para la atención, cuidados y recreación, mas no son proyectos diseñados para brindar los servicios y cuidados que requieren los adultos mayores. Motivo por la cual hemos visto por conveniente satisfacer las necesidades del adulto mayor y diseñar un centro residencial asistido, el cual beneficiara a todos los adultos mayores, garantizando su calidad de vid

Estrategias de diseño urbano-arquitectónico circular y regeneración de la imagen urbana del parque de la Av. Cahuide, La Esperanza 2023

Actualmente existen problemas sobre el manejo de residuos sólidos en la ciudad de Trujillo, lo que genera que gran parte de residuos queden expuestos en diferentes puntos de una calle, incluso utilizan áreas que están abandonadas que, en algunos casos, estas áreas son destinadas para espacios públicos, lo que origina problemas de contaminación ambiental, deterioro de la imagen urbana, y focos de infección. Por lo tanto, es necesario que se pueda implementar estrategias de diseño urbano-arquitectónico circular, para que de esta manera se pueda valorizar los residuos sólidos a su vez que se conserve los recursos naturales, siendo así que se propone como objetivo determinar las estrategias urbanoarquitectónico circular para la regeneración de la imagen urbana del parque de la Av. Cahuide, La Esperanza 2023. La investigación desarrollada fue tipo mixta ya que se recolectó datos cuantitativos y cualitativos y corresponde a un diseño de investigación no experimental, donde se recopiló la información obtenida por los estudios de casos, mediante encuestas y entrevistas donde se pudo obtener resultados que fueron procesados para aplicarlos en la investigación. En cuanto a los resultados obtenidos, se logró establecer 3 aspectos importantes que servirán para regenerar la imagen urbana del sector, los cuales son establecer los espacios de diseño urbano-arquitectónico circular, el mobiliario urbano circular que requieren estos espacios y el tipo de vegetación que necesita el parque. Se concluye que el diseño urbano-arquitectónico circular permite el aprovechamiento de un diseño sostenible mediante la integración de elementos naturales y artificiales, fomentando así a la población a tener un sentido de pertenencia

EFECTO DEL PLOMO EN EL PERIODO DE PREÑEZ DE RATAS Y CRIAS. RATTUS NORVEGICUS WISTER -AREQUIPA ABRIL-AGOSTO-2016

En las últimas décadas se ha incrementado la preocupación mundial sobre las repercusiones que tienen los contaminantes ambientales en la salud del ser humano, siendo uno de ellos el plomo. Uno de los grupos de más alto riesgo está integrado por el binomio madre-feto, de acuerdo a diversos estudios que sugieren que la exposición in útero de plomo, pueden comprometer el desarrollo durante la vida intrauterina y la niñez temprana. Objetivo: determinar el efecto del plomo en ratas durante el periodo de preñez Rattus Norvergicus Wister y crías, expuestas a concentración de 0.06, 0.16, 0.26 g de plomo por vía inhalatoria y vía digestiva. Material y métodos: Estudio de diseño experimental, prospectivo, longitudinal, comparativo realizado en la ciudad de Arequipa, entre abril y agosto 2016. Se utilizó 16 ratas del género Rattus Norvergicus Var. WISTER, entre 200 a 300 g con una edad promedio de 20 semanas, que fueron distribuídas en 4 grupos. Se intoxicó con plomo a 12 ratas preñadas durante todo su ciclo de embarazo (28 días), y 4 ratas de control. El plomo utilizado fue dispersado en el ambiente y en la comida de las ratas para su inhalación, y en el agua por la vía oral, en concentraciones de 0.06, 0.16, 0.26 g/m3 para los grupos experimentales. Cada semana se midió los niveles de plomo en la sangre de los tres grupos expuestos por 5 semanas. Se respetó el código de ética de la investigación en animales de experimentación. Para la comparación de las variables categóricas se utilizó la prueba de chi cuadrado de homogeneidad y para las variables numéricas se realizó el análisis de la varianza de un factor de variación y la prueba de especificidad de Tukey, todo el análisis se trabajó con un nivel de significancia del 5%. El proceso de la información se realizó mediante el software estadístico SPSS Versión 21

PER-MARE: Adaptive Deployment of MapReduce over Pervasive Grids

International audienceMapReduce is a parallel programming paradigm successfully used to perform computations on massive amounts of data, being widely deployed on clusters, grid, and cloud infrastructures. Interestingly, while the emergence of cloud in- frastructures has opened new perspectives, several enterprises hesitate to put sensible data on the cloud and prefer to rely on internal resources. In this paper we introduce the PER- MARE initiative, which aims at proposing scalable techniques to support existent MapReduce data-intensive applications in the context of loosely coupled networks such as pervasive and desktop grids. By relying on the MapReduce programming model, PER-MARE proposes to explore the potential advan- tages of using free unused resources available at enterprises as pervasive grids, alone or in a hybrid environment. This paper presents the main lines that orient the PER-MARE approach and some preliminary results

Transforming U.S. Energy Innovation

The United States and the world need a revolution in energy technology—a revolution that would improve the performance of our energy systems to face the challenges ahead. A dramatic increase in the pace of energy innovation is crucial to meet the challenges of: • Energy and national security, to address the dangers of undue reliance on dwindling supplies of oil increasingly concentrated in some of the most volatile regions of the world, and to limit the connection between nuclear energy and the spread of nuclear weapons; • Environmental sustainability, to reduce the wide range of environmental damages due to energy production and use, from fine particulate emissions at coal plants, to oil spills, to global climate disruption; and • Economic competitiveness, to seize a significant share of the multi-trillion-dollar clean energy technology market and improve the balance of payments by increasing exports, while reducing the hundreds of billions of dollars spent every year on importing oil. In an intensely competitive and interdependent global landscape, and in the face of large climate risks from ongoing U.S. reliance on a fossil-fuel based energy system, it is important to maintain and expand long-term investments in the energy future of the U.S. even at a time of budget stringency. It is equally necessary to think about how to improve the efficiency of those investments, through strengthening U.S. energy innovation institutions, providing expanded incentives for private-sector innovation, and seizing opportunities where international cooperation can accelerate innovation. The private sector role is key: in the United States the vast majority of the energy system is owned by private enterprises, whose innovation and technology deployment decisions drive much of the country’s overall energy systems. Efficiently utilizing government investments in energy innovation requires understanding the market incentives that drive private firms to invest in advanced energy technologies, including policy stability and predictability. The U.S. government has already launched new efforts to accelerate energy innovation. In particular, the U.S. Department of Energy is undertaking a Quadrennial Technology Review to identify the most promising opportunities and provide increased coherence and stability. Our report offers analysis and recommendations designed to accelerate the pace at which better energy technologies are discovered, developed, and deployed, and is focused in four key areas: • Designing an expanded portfolio of federal investments in energy research, development, demonstration (ERD&D), and complementary policies to catalyze the deployment of novel energy technologies; • Increasing incentives for private-sector innovation and strengthening federal-private energy innovation partnerships; • Improving the management of energy innovation institutions to maximize the results of federal investments; and • Expanding and coordinating international energy innovation cooperation to bring ideas and resources together across the globe to address these global challenges