421 research outputs found
Design and Implementation of CAOS: An Implicitly Parallel Language for the High-Performance Simulation of Cellular Automata
New larval host records for Tortricidae (Lepidoptera) from an Ecuadorian Andean cloud forest
A biological inventory focused on plant-caterpillar-parasitoid associations at Yanayacu Biological Station, Ecuador, yielded 81 adult specimens of Tortricidae (Lepidoptera: Tortricoidea) representing 42 species in 13 genera. Based on this material, new host records are presented for species in the following genera: Lypothora Razowski, 1981; Inape Razowski, 1988; Orthocomotis Dognin, 1905; Paraptila Meyrick, 1912; Runtunia Razowski and Wojtusiak, 2008; Transtillaspis Razowski, 1987; Xoser Razowski and Pelz, 2003; Argyrotaenia Stephens, 1852; Anacrusis Zeller, 1877; Sisurcana Powell, 1986; Amorbia Clemens, 1860; Paramorbia Powell and Lambert, 1986; and Episimus Walsingham, 1892. Tortricids were reared from 46 plant species representing 24 plant families, with Piperaceae, Melastomataceae, and Asteraceae supporting the most tortricid herbivores (six species each).
Un inventario biológico centrado en relaciones parasitoide-oruga-planta desarrollado en la Estación Biológica de Yanayacu, en Ecuador, dio lugar a 81 ejemplares adultos de Tortricidae (Lepidoptera: Tortricoidea) representativos de 13 géneros y 42 especies. Basándose en este material, se presentan nuevos registros de plantas huésped para especies de los siguientes géneros: Lypothora Razowski, 1981; Inape Razowski, 1988; Orthocomotis Dognin, 1905; Paraptila Meyrick, 1912; Runtunia Razowski y Wojtusiak, 2008; Transtillaspis Razowski, 1987; Xoser Razowski y Pelz, 2003; Argyrotaenia Stephens, 1852; Anacrusis Zeller, 1877; Sisurcana Powell, 1986; Amorbia Clemens, 1860; Paramorbia Powell y Lambert, 1986; y Episimus Walsingham, 1892. Los tortrícidos se criaron a partir de 46 especies de plantas representativas de 24 familias de plantas. Las familias Piperaceae, Melastomataceae y Asteraceae resultaron ser las que soportan la mayor parte de los tortrícidos (seis especies cada una)
New larval host records for Tortricidae (Lepidoptera) from an Ecuadorian Andean cloud forest
A biological inventory focused on plant-caterpillar-parasitoid associations at Yanayacu Biological Station, Ecuador, yielded 81 adult specimens of Tortricidae (Lepidoptera: Tortricoidea) representing 42 species in 13 genera. Based on this material, new host records are presented for species in the following genera: Lypothora Razowski, 1981; Inape Razowski, 1988; Orthocomotis Dognin, 1905; Paraptila Meyrick, 1912; Runtunia Razowski and Wojtusiak, 2008; Transtillaspis Razowski, 1987; Xoser Razowski and Pelz, 2003; Argyrotaenia Stephens, 1852; Anacrusis Zeller, 1877; Sisurcana Powell, 1986; Amorbia Clemens, 1860; Paramorbia Powell and Lambert, 1986; and Episimus Walsingham, 1892. Tortricids were reared from 46 plant species representing 24 plant families, with Piperaceae, Melastomataceae, and Asteraceae supporting the most tortricid herbivores (six species each).
Un inventario biológico centrado en relaciones parasitoide-oruga-planta desarrollado en la Estación Biológica de Yanayacu, en Ecuador, dio lugar a 81 ejemplares adultos de Tortricidae (Lepidoptera: Tortricoidea) representativos de 13 géneros y 42 especies. Basándose en este material, se presentan nuevos registros de plantas huésped para especies de los siguientes géneros: Lypothora Razowski, 1981; Inape Razowski, 1988; Orthocomotis Dognin, 1905; Paraptila Meyrick, 1912; Runtunia Razowski y Wojtusiak, 2008; Transtillaspis Razowski, 1987; Xoser Razowski y Pelz, 2003; Argyrotaenia Stephens, 1852; Anacrusis Zeller, 1877; Sisurcana Powell, 1986; Amorbia Clemens, 1860; Paramorbia Powell y Lambert, 1986; y Episimus Walsingham, 1892. Los tortrícidos se criaron a partir de 46 especies de plantas representativas de 24 familias de plantas. Las familias Piperaceae, Melastomataceae y Asteraceae resultaron ser las que soportan la mayor parte de los tortrícidos (seis especies cada una)
A micrometeorological data base for the Mexico City Metropolitan Area
In order to overcome the lack of the surface micrometeorological data required for air quality studies in the Mexico City Metropolitan Area (MCMA), a long-term micrometeorological campaign was carried out in this area along the 2001-year. Three micrometeorological surface stations were installed at sites located at north,
north-east, and south sectors of the MCMA. Each station was equipped with a 3D ultrasonic turbulence sensor and with conventional meteorological sensors for temperature, relative humidity, pressure, global radiation, net radiation, and rain. The sampling rates were 10 Hz for the ultrasonic sensor, and 1 Hz for the conventional sensors. One-hour averages were calculated for all the meteorological
parameters and for the turbulence parameters such as friction velocity, scale temperature, Monin-Obukhov length, sensible heat flux and turbulent kinetic energy, among others. A simple micrometeorological database was prepared and mounted on a free access Internet page to furnish a specialized tool to the local Authorities to be utilized in health prevention and pollution regulation applications
SP(k) - A hydrodynamical simulation-based model for the impact of baryon physics on the non-linear matter power spectrum
Upcoming large-scale structure surveys will measure the matter power spectrum to approximately percent level accuracy with the aim of searching for evidence for new physics beyond the standard model of cosmology. In order to avoid biasing our conclusions, the theoretical predictions need to be at least as accurate as the measurements for a given choice of cosmological parameters. However, recent theoretical work has shown that complex physical processes associated with galaxy formation (particularly energetic feedback processes associated with stars and especially supermassive black holes) can alter the predictions by many times larger than the required accuracy. Here we present SP(k), a model for the effects of baryon physics on the non-linear matter power spectrum based on a new large suite of hydrodynamical simulations. Specifically, the ANTILLES suite consists of 400 simulations spanning a very wide range of the ‘feedback landscape’ and show that the effects of baryons on the matter power spectrum can be understood at approaching the percent level in terms of the mean baryon fraction of haloes, at scales of up to k ≲ 10h Mpc−1 and redshifts up to z = 3. For the range of scales and redshifts that will be probed by forthcoming cosmic shear measurements, most of the effects are driven by galaxy group-mass haloes (M ∼ 1013 − 14 M⊙). We present a simple Python implementation of our model, available at https://github.com/jemme07/pyspk, which can be used to incorporate baryon effects in standard gravity-only predictions, allowing for marginalisation over baryon physics within cosmological pipelines
SP(k) -- A hydrodynamical simulation-based model for the impact of baryon physics on the non-linear matter power spectrum
Upcoming large-scale structure surveys will measure the matter power spectrum to approximately percent level accuracy with the aim of searching for evidence for new physics beyond the standard model of cosmology. In order to avoid biasing our conclusions, the theoretical predictions need to be at least as accurate as the measurements for a given choice of cosmological parameters. However, recent theoretical work has shown that complex physical processes associated with galaxy formation (particularly energetic feedback processes associated with stars and especially supermassive black holes) can alter the predictions by many times larger than the required accuracy. Here we present SP(k), a model for the effects of baryon physics on the non-linear matter power spectrum based on a new large suite of hydrodynamical simulations. Specifically, the ANTILLES suite consists of 400 simulations spanning a very wide range of the ‘feedback landscape’ and show that the effects of baryons on the matter power spectrum can be understood at approaching the percent level in terms of the mean baryon fraction of haloes, at scales of up to k ≲ 10h Mpc−1 and redshifts up to z = 3. For the range of scales and redshifts that will be probed by forthcoming cosmic shear measurements, most of the effects are driven by galaxy group-mass haloes (M ∼ 1013 − 14 M⊙). We present a simple Python implementation of our model, available at https://github.com/jemme07/pyspk, which can be used to incorporate baryon effects in standard gravity-only predictions, allowing for marginalisation over baryon physics within cosmological pipelines
The BAHAMAS project: Evaluating the accuracy of the halo model in predicting the non-linear matter power spectrum
The halo model formalism is widely adopted in cosmological studies for predicting the growth of large-scale structure in the Universe. However, to date there have been relatively few direct comparisons of the halo model with more accurate (but much more computationally expensive) cosmological simulations. We test the accuracy of the halo model in reproducing the non-linear matter power spectrum, P(k), when the main inputs of the halo model (specifically the matter density profiles, halo mass function, and linear bias) are taken directly from the BAHAMAS simulations and we assess how well the halo model reproduces P(k) from the same simulations. We show that the halo model generally reproduces P(k) in the deep non-linear regime (1-halo) to typically a few percent accuracy, but struggles to reproduce (approx. 15% error) P(k) at intermediate scales of 0.1 < k [h/ Mpc] < 3 at z=0, marking the transition between the 1-halo and 2-halo terms. We show that the magnitude of this error is a strong function of the halo mass definition (through its effects on radial extent of haloes) and of redshift. Furthermore, we test the accuracy of the halo model in recovering the relative impact of baryons on P(k). We show that the systematic errors in recovering the absolute P(k) largely cancel when considering the relative impact of baryons. This suggests that the halo model can make precise predictions for the baryonic suppression, offering a fast and accurate way to adjust collisionless matter power spectra for the presence of baryons and associated processes
Biofortification with magnesium nanofertilizer on bioactive compounds and antioxidant capacity in green beans
The use of nanofertilizers has the potential to be used to enrich edible organs with nutrients (biofortification) and improve the biosynthesis of bioactive compounds and their antioxidant capacity. Therefore, the objective of this study was to evaluate the effect of biofortification with magnesium (Mg) nanofertilizer on the accumulation of bioactive compounds and antioxidant capacity in green bean cv. Strike compared to a conventional fertilizer (Mg sulfate). Two sources of Mg were applied via foliar: Nanofertilizer and Mg Sulfate at doses of 0, 50, 100, 200, and 300 mg/L of Mg. The accumulation of total polyphenols, flavonoids, anthocyanins, bioactive compounds, and antioxidant capacity was evaluated in pods. The results obtained in this research confirm the effect of green bean pods biofortified with Mg nanofertilizers on the production and accumulation of bioactive compounds and antioxidant capacity, improving the nutrition and nutraceutical quality of green beans. The 50 mg/L dose of Mg nanofertilizer was the most effective treatment to increase bioactive compounds and antioxidant capacity compared to high doses of Mg sulfate (300 mg/L). This is one of the first studies focused on biofortification with Mg nanofertilizers and their effect on the nutraceutical quality of green beans
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The Magdalena Ridge Observatory Interferometer: 2014 status update
The Magdalena Ridge Observatory Interferometer has been designed to be a 10 × 1.4 m aperture long-baseline optical/near-infrared interferometer in an equilateral "Y" configuration, and is being deployed west of Socorro, NM on the Magdalena Ridge. Unfortunately, first light for the facility has been delayed due to the current difficult funding regime, but during the past two years we have made substantial progress on many of the key subsystems for the array. The design of all these subsystems is largely complete, and laboratory assembly and testing, and the installation and site acceptance testing of key components on the Ridge are now underway. This paper serves as an overview and update on the facility's present status and changes since 2012, and the plans for future activities and eventual operations of the facilities. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.The Magdalena Ridge Observatory Interferometer is funded by the U.S. Department of Transportation, the State of New
Mexico, and New Mexico Tech with previous funding from the Navy Research Laboratory (NRL, agreement no.
N00173-01-2-C902).This is the final published version of the article, also available from SPIE at http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1891908. Copyright 2014 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. http://dx.doi.org/10.1117/12.205733
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