Small Angular Scale Simulations of the Microwave Sky

We describe and compare two types of microwave sky simulations which are good for small angular scales. The first type uses expansions in spherical harmonics, and the second one is based on plane waves and the Fast Fourier Transform. The angular power spectrum is extracted from maps corresponding to both types of simulations, and the resulting spectra are appropriately compared. In this way, the features and usefulness of Fourier simulations are pointed out. For $\ell \geq 100$, all the simulations lead to similar accuracies; however, the CPU cost of Fourier simulations is $\sim 10$ times smaller than that for spherical harmonic simulations. For $\ell \leq 100$, the simulations based on spherical harmonics seem to be preferable.Comment: 16 pages (LATEX), 2 postcript figures. Accepted in Ap

Entomological fauna associated with Aguaribay : Mendoza (Argentina)

En los relevamientos de especias dañinas y benéficas presentes en el aguaribay (Schinus molle L. var. Areira), para inventariar su entomofauna se efectuaron observaciones en distintas zonas de Mendoza (Argentina) en 1988/91 y 1994/96, confirmando y actualizando la bibliografía. Se recolectó material a campo para su identificación sistemática. Se evaluaron daños y se los documentó fotográficamente. En el laboratorio se conservaron muestras con parasitoides hasta la aparición de adultos para su clasificación, registrándose 8 especies de Homoptera, 7 de Hymenoptera, 7 de Coleoptera, 5 de Lepidoptera, 4 de Diptera, 4 de Thysanoptera, 2 de Hemiptera y 2 de Neuroptera. Las principales especies que afectan al Aguaribay son Calophya sp. (Homoptera - Psyllidae), Ceroplastes grandis (Homoptera - Coccidae) y Aphis schinifoliae (Homoptera - Aphididae). También cuenta con una importante fauna benéfica: coccinélidos, parasitoides, sírfidos y crisópidos.Pest and beneficial species present in Schinus molle L. var. Areira were monitoring in order to obtain an inventory of its entomological fauna. It was made observations in different zones of Mendoza from 1988 to 1991, and then, between 1994 and 1996, it was confirmed further observations and it was brought up to day bibliographical revisions. It was collected material in field in order to made its systematic identification. Damages were evaluated and documented photographically. Samples with parasitoids were stored in laboratory until the appearance of adults for their classification. It was registered: 8 species of Homoptera, 7 of Hymenoptera, 7 of Coleop-tera, 5 of Lepidoptera, 4 of Diptera, 4 of Thysanoptera, 2 of Hemiptera and 2 of Neuroptera. The main pest are: Calophya sp. (Homoptera - Psyllidae), Ceroplastes grandis (Homoptera - Coccidae) and Aphis schinifoliae (Homoptera - Aphididade). Also, there is an important beneficial fauna: Coccinellidae, parasitoids, Syrphidae and Chrysopidae.Fil: Sáez, César C.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Mácola, Guido S.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Holgado, Miriam G.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: García Sáez, José G.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias Biológica

Vacuum type I spacetimes and aligned Papapetrou fields: symmetries

We analyze type I vacuum solutions admitting an isometry whose Killing 2--form is aligned with a principal bivector of the Weyl tensor, and we show that these solutions belong to a family of type I metrics which admit a group $G_3$ of isometries. We give a classification of this family and we study the Bianchi type for each class. The classes compatible with an aligned Killing 2--form are also determined. The Szekeres-Brans theorem is extended to non vacuum spacetimes with vanishing Cotton tensor.Comment: 19 pages; a reference adde

Thrips : population dynamics of Thrips tabaci Lind. in garlic (Mendoza, Argentina)

En el presente trabajo se da a conocer la dinámica poblacional de Thrips tabaci (trips del ajo y la cebolla) en cultivos de ajos colorados del departamento de Luján de Cuyo, provincia de Mendoza, verificándose que el máximo pico poblacional expresado en números de individuos por plantas se alcanza en noviembre, con un ascenso rápido que comienza en octubre y un decrecimiento de igual característica en diciembre, en coincidencia con la finalización del ciclo fenológico del cultivo.The actual work give to know the population dynamic of the Trhips tabaci (onions and garlic thrips) in cultivation of “red onions“ in the departament Luján de Cuyo, of the province of Mendoza, preve that the maximum populatin peak expresed in number of individuals per plants is reached in november, with a fast ascension in october and degression of equal characteristcs in december, in coincidence with the end of phenologyc cicle of the cultivation.Fil: García Sáez, José G.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Mácola, Guido S.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias Biológica

Thin and thick cloud top height retrieval algorithm with the Infrared Camera and LIDAR of the JEM-EUSO Space Mission

The origin of cosmic rays have remained a mistery for more than a century. JEM-EUSO is a pioneer space-based telescope that will be located at the International Space Station (ISS) and its aim is to detect Ultra High Energy Cosmic Rays (UHECR) and Extremely High Energy Cosmic Rays (EHECR) by observing the atmosphere. Unlike ground-based telescopes, JEM-EUSO will observe from upwards, and therefore, for a properly UHECR reconstruction under cloudy conditions, a key element of JEM-EUSO is an Atmospheric Monitoring System (AMS). This AMS consists of a space qualified bi-spectral Infrared Camera, that will provide the cloud coverage and cloud top height in the JEM-EUSO Field of View (FoV) and a LIDAR, that will measure the atmospheric optical depth in the direction it has been shot. In this paper we will explain the effects of clouds for the determination of the UHECR arrival direction. Moreover, since the cloud top height retrieval is crucial to analyze the UHECR and EHECR events under cloudy conditions, the retrieval algorithm that fulfills the technical requierements of the Infrared Camera of JEM-EUSO to reconstruct the cloud top height is presently reported.Comment: 5 pages, 6 figures, Atmohead Conference 201

Strategies of management for the control of Thrips tabaci Lind. in red garlic

En cultivos de ajo colorado de Luján de Cuyo (Mendoza, Argentina) realizados en 1996/97/98 se compararon tres alternativas de manejo para el control del trips del ajo y la cebolla: a) control químico en tiempos calendarios sin considerar la dinámica poblacional, modalidad del productor b) control químico teniendo en cuenta la dinámica poblacional c) sin tratamientos químicos Los resultados obtenidos no muestran diferencias estadísticamente significativas en los rendimientos del cultivo (p > 0,05) para las condiciones del ensayo y no se recomienda el empleo de tratamientos químicos.In Red Garlic cultivation of Luján de Cuyo (Mendoza, Argentina) carried out during 1996/97/98, were compared three alternatives of management for the control of the onion and garlic Thrips. a) chemical control according calendar treatment proposed by productors b) chemical control according with the dynamical of the population c) without chemical control The results do not shown statistical significant different in yields (p > 0,05) in the field conditions of the essay, for this, we do not recommend the use of chemical treatment.Fil: García Sáez, José G.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Mácola, Guido S.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Llera, Joaquín. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Biomatemática y Fisicoquímic

Caracterización de la cadena de comercialización de la langosta (Jasus Frontalis) del Archipiélago Juan Fernández

La economía del Archipiélago Juan Fernández, se sustenta principalmente por la extracción y comercialización de las langostas vivas y, en menor medida, por la venta de otras especies. Los pescadores de la zona, en forma individual o en varias agrupaciones, venden a empresas intermediarias establecidas en las islas Robinson Crusoe y Alejandro Selkirk, o bien, se comprometen a entregar el recurso en forma exclusiva a algún comprador, mediante convenios informales.La presente investigación, describe la estructura comercial de la langosta (Jasus Frontalis), del archipiélago de Juan Fernández, describiendo todos los integrantes de su cadena comercial, de la cual no habían precedentes, se estiman los costos y márgenes de comercialización, para cada eslabón, y finalmente se realiza un análisis de costos de los pescadores, otorgando antecedentes que permitan generar estrategias de corto, mediano y largo plazo, con el fin de lograr, una comercialización más eficiente, para el primer eslabón de la cadena.Esta investigación es un estudio de tipo exploratorio, realizado entre los años 2007 y 2008., cuyos resultados permiten conocer los principales actores que participan en la cadena de comercialización de las langostas, estos son: Pescadores, Intermediarios en la Isla y del Continente. Se determinó que, los pescadores obtienen un 37,9% de retorno sobre sus ventas, por lo que son el eslabón más rentable en relación a los costos. Sin embargo el margen de comercialización indica que los pescadores ganan el 18,7 % del precio final.  

sta-1 is repressed by mir-58 family in Caenorhabditis elegans.

The miR-58 family comprises 6 microRNAs with largely shared functions, and with an overall high expression, because one of its members, miR-58, is the most abundant microRNA in Caenorhabditis elegans. We recently found that 2 TGF-β signaling pathways, Sma/Mab and Dauer, responsible for body size and dauer formation respectively, among other phenotypes, are downregulated by the miR-58 family. Here, we further explore this family by showing that it also acts through the sta-1 3'UTR. sta-1 encodes a transcription factor, homologous to mammalian STATs, that inhibits dauer formation in association with the TGF-β Dauer pathway. We also observe that mutants with a constitutively active TGF-β Dauer pathway express higher levels of sta-1 mRNA. Our results reinforce the view of the miR-58 family and STA-1 as regulators of dauer formation in coordination with the TGF-β Dauer pathway.This work was funded by Fondo de Investigaciones Sanitarias (PI08/642 and PI11/120 to E.L.). E.L., M.P.L. and A.G.S. were supported by programs Ramón y Cajal, Formación de Profesorado Universitario and Fondo de Investigaciones Sanitarias, respectively, all of them from the Spanish Government. C. elegans strains were provided by CGC, which is funded by NIH Office of Research Infrastructure Programs (P40 OD010440).S