Dynamical evolution of V-type photometric candidates in the outer Main-belt

V-type asteroids, characterized by two absorption bands at 1.0 and 2.0 $\mu m$, are usually thought to be portions of the crust of differentiated or partially differentiated bodies. Most V-type asteroids are found in the inner main belt and are thought to be current or past members of the Vesta dynamical family. Recently, several V-type photometric candidates have been identified in the central and outer main belt. While the dynamical evolution of V-type photometric candidates in the central main belt has been recently investigated, less attention has been given to the orbital evolution of basaltic material in the outer main belt as a whole. Here we identify known and new V-type photometric candidates in this region, and study their orbital evolution under the effect of gravitational and non-gravitational forces. A scenario in which a minimum of three local sources, possibly associated with the parent bodies of (349) Dembowska, (221) Eos, and (1459) Magnya, could in principle explain the current orbital distribution of V-type photometric candidates in the region.Comment: This paper has 6 figures and 1 table. Accepted for publication in MNRAS. arXiv admin note: text overlap with arXiv:1401.633

Dynamical evolution and chronology of the Hygiea asteroid family

The asteroid (10) Hygiea is the fourth largest asteroid of the Main Belt, by volume and mass, and it is the largest member of its own family. Previous works investigated the long-term effects of close encounters with (10) Hygiea of asteroids in the orbital region of the family, and analyzed the taxonomical and dynamical properties of members of this family. In this paper we apply the high-quality SDSS-MOC4 taxonomic scheme of DeMeo and Carry (2013) to members of the Hygiea family core and halo, we obtain an estimate of the minimum time and number of encounter necessary to obtain a $3\sigma$ (or 99.7%) compatible frequency distribution function of changes in proper $a$ caused by close encounters with (10) Hygiea, we study the behavior of asteroids near secular resonance configurations, in the presence and absence of the Yarkovsky force, and obtain a first estimate of the age of the family based on orbital diffusion by the Yarkovsky and YORP effects with two methods. The Hygiea family is at least 2 Byr old, with an estimated age of $T = 3200^{+380}_{-120}$ Myr and a relatively large initial ejection velocity field, according to the approach of Vokrouhlick\'{y} et al. (2006a, b). Surprisingly, we found that the family age can be shortened by $\simeq$ 25% if the dynamical mobility caused by close encounters with (10) Hygiea is also accounted for, which opens interesting new research lines for the dynamical evolution of families associated with massive bodies. In our taxonomical analysis of the Hygiea asteroid family, we also identified a new V-type candidate: the asteroid (177904) (2005 SV5). If confirmed, this could be the fourth V-type object ever to be identified in the outer main belt.Comment: 13 page, 15 figures, and 4 table

Dynamical evolution of V-type asteroids in the central main belt

V-type asteroids are associated with basaltic composition, and are supposed to be fragments of crust of differentiated objects. Most V-type asteroids in the main belt are found in the inner main belt, and are either current members of the Vesta dynamical family (Vestoids), or past members that drifted away. However, several V-type photometric candidates have been recently identified in the central and outer main belt. The origin of this large population of V-type objects is not well understood. Since it seems unlikely that Vestoids crossing the 3J:-1A mean-motion resonance with Jupiter could account for the whole population of V-type asteroids in the central and outer main belt, origin from local sources, such as the parent bodies of the Eunomia, and of the Merxia and Agnia asteroid families, has been proposed as an alternative mechanism. In this work we investigated the dynamical evolution of the V-type photometric candidates in the central main belt, under the effect of gravitational and non-gravitational forces. Our results show that dynamical evolution from the parent bodies of the Eunomia and Merxia/Agnia families on timescales of 2 Byr or more could be responsible for the current orbital location of most of the low-inclined V-type asteroids.Comment: 16 pages, 10 figures, 3 tables. Accepted for publication in MNRA

A multi-domain approach to asteroid families identification

Previous works have identified families halos by an analysis in proper elements domains, or by using Sloan Digital Sky Survey-Moving Object Catalog data, fourth release (SDSS-MOC4) multi-band photometry to infer the asteroid taxonomy, or by a combination of the two methods. The limited number of asteroids for which geometric albedo was known until recently discouraged in the past the extensive use of this additional parameter, which is however of great importance in identifying an asteroid taxonomy. The new availability of geometric albedo data from the Wide-field Infrared Survey Explorer (WISE) mission for about 100,000 asteroids significantly increased the sample of objects for which such information, with some errors, is now known. In this work we proposed a new method to identify families halos in a multi-domain space composed by proper elements, SDSS-MOC4 (a*,i-z) colors, and WISE geometric albedo for the whole main belt (and the Hungaria and Cybele orbital regions). Assuming that most families were created by the breakup of an undifferentiated parent body, they are expected to be homogeneous in colors and albedo. The new method is quite effective in determining objects belonging to a family halo, with low percentages of likely interlopers, and results that are quite consistent in term of taxonomy and geometric albedo of the halo members.Comment: 23 pages, 18 figures, 6 tables. Accepted for publication in MNRA

First Measurements with a Linear Mirror Device of Second Generation

In 2011, an innovative technique for concentrating solar light has been introduced in the market\u2014the Linear Mirror. It is a very simple device, and it works well also in winter and in northern climates. In 2012, it was certified with the Solar Keymark. Based on this technology, a further improved device was developed and was presented here\u2014the Linear Mir- ror of second generation (or Linear Mirror II). This is a multi-purpose machine, which overcomes some of the limita- tions of the previous device. First measurements with the Linear Mirror II are presented in this paper

El control de identidad para la ubicación de personas con orden de captura en el Distrito Judicial de Huánuco. 2016

The present investigation was as objective to determine the influence on the actions of police personnel in the execution of the operations of identity control with the inclusion of the purpose" location of persons with arrest warrant "of article 205 of the Code of Criminal Procedure. Of applied type, descriptive-correlational level, non-experimental descriptive, transverse, correlational design. The population was made up of 110 police personnel and the sample conformed by the same population. As a result, the actions of police personnel have a positive influence on the execution of identity control operations with the inclusion of the purpose "location of persons with arrest warrants" in article 205 of the Code of Criminal Procedure, since 87% of The police officers believe that the actions are efficient, 11% believe that they are regularly efficient and 2% believe that they are deficient. This influence is based on the hypothesis test where in the resulting model is: Vd = 0.412Vi - 0.596; It is observed that there is a positive influence between the actions of police personnel and the inclusion of the purpose "location of persons with arrest warrants". Just as the ratio has a value of 0.844 and the coefficient of determination (R squared) is 0.713 (71.3%) indicates that the resulting model determines a high adjustment of police personnel and the inclusion of the purpose of "location of persons with capture order ", where the influence is 71.3%.La presente investigación tuvo como objetivo determinar de qué manera influye en el accionar del personal policial que ejecuta los operativos de control de identidad, la modificatoria del artículo 205º del Código Procesal Penal, con la inclusión del propósito “ubicación de personas con orden de captura”. De tipo aplicada, nivel descriptivo-correlacional, diseño no experimental descriptivo, transversal, correlacional. La población conformada por 110 efectivos policiales y la muestra conformada por la misma población. Como resultados se tiene que el accionar del personal policial tiene influencia positiva en la ejecución de operativos en control de identidad con la inclusión del propósito “ubicación de personas con orden de captura” del artículo 205º del Código Procesal Penal, puesto que el 87% de los efectivos policiales opinan que el accionar es eficiente, el 11% opina que es regularmente eficiente y el 2%, opina que es deficiente. Esta influencia se fundamenta con la prueba de hipótesis donde en el modelo resultante es: Vd = 0.412Vi - 0.596; se observa, que existe una influencia positiva entre el accionar del personal policial y la inclusión del propósito “ubicación de personas con orden de captura”. Del mismo modo como la relación tiene un valor de 0.844 y el coeficiente de determinación (R cuadrado) es de 0.713 (71.3%) indica que el modelo resultante determina un ajuste alto el accionar del personal policial y la inclusión del propósito “ubicación de personas con orden de captura”, donde la influencia es del 71.3%

\u3cem\u3eMycobacterium marinum\u3c/em\u3e Infection After Exposure to Coal Mine Water

Mycobacterium marinum infection has been historically associated with exposure to aquariums, swimming pools, fish, or other marine fauna. We present a case of M marinum left wrist tenosynovitis and elbow bursitis associated with a puncture injury and exposure to coal mine water in Illinois

Aceite de matico (Piper aduncum) en el control de Moniliophthora roreri agente causal de la moniliasis en cacao

Objetivos: Evaluar a nivel in vitro el efecto del aceite de matico (Piper aduncum) extraído de brotes, hojas e inflorescencia sobre el crecimiento micelial de Moniliophthora roreri. Metodología: Se utilizó el diseño completamente al azar con nueve tratamientos más un testigo adicional. Los tratamientos fueron el resultado de la combinación de los factores lugar de extracción del aceite de matico (brotes, hojas e inflorescencias) y volúmenes de aplicación (11, 15 y 30 μL). Cada tratamiento tuvo tres repeticiones. Sobre cultivos puros de cinco días de crecimiento de M. roreri en medio papa dextrosa agar (PDA), colocados en extremos equidistantes de discos de papel de 0,6; 0,8 y 1,1 cm de diámetro, se hicieron las aplicaciones de los tratamientos. Se evaluaron el ritmo de crecimiento micelial y el porcentaje de inhibición del crecimiento micelial. Resultados: Los aceites extraídos de los brotes, hojas e inflorescencias reducen el ritmo de crecimiento del M. roreri en comparación al testigo. Del mismo modo, las aplicaciones de los volúmenes de 15 y 30 μL inhiben el crecimiento micelial del hongo. Conclusiones: Los aceites extraídos de P. aduncum presentaron bajo condiciones de laboratorio, un efecto de reducción e inhibición en el desarrollo del hongo M. roreri, pudiendo ser una buena alternativa para el control de este patógeno.Palabras claves: Piper aduncum, Moniliophthora roreri, aceite esencial, moniliasis, hidrodestilació

Determinación de haplotipos de Bactericera cockerelli en la provincia de Huancabamba - Piura, Peru

Bactericera cockerelli es un insecto polífago que afecta solanáceas de importancia económica como papa (Solanum tuberosum), tomate (Solanum lycopersicum), berenjena (Solanum melongena), tabaco (Nicotiana tabacum) y otras solanáceas silvestres (CABI, 2022). El daño causado puede ser de dos formas, la directa la producen principalmente las ninfas. Al succionar la savia para alimentarse segregan toxinas a la planta además de las excretas que dejan en las hojas pueden dar origen a la formación de hongos saprófitos. El daño indirecto es aún más alarmante pues B. cockerelli es el vector de la bacteria Candidatus Liberibacter solanacearum (CaLso) (sinónimo Ca. Liberibacter psyllaurous). Esta bacteria ocasiona la devastadora enfermedad llamada zebra chip o papa manchada (Pérez et al., 2021). Con el objetivo de entender la dinámica poblacional temporal y espacial de B. cockerelli se está empleando un nivel de clasificación más específico mediante los haplotipos. Definiendo un haplotipo como la forma genética que difiere de cualquier otra forma por variaciones en su secuencia de ADN en al menos un nucleótido (Cerna et al., 2021). Estudios han identificado cuatro tipos de haplotipos mitocondriales dentro de Estados Unidos que están asociados a cuatro regiones geográficas: Oeste. Central, Noroeste, Suroeste (Swisher et al., 2014). En Sudamérica, específicamente en Ecuador se dio el primer reporte de B. cockerelli afectando plantaciones de papa, y mediante el análisis de la secuencia COI se determinó que los especímenes correspondían al haplotipo central. El psílido de la papa está ampliamente distribuido en América del Norte (México, Estados Unidos y Canadá) y también en países de Centroamérica como Guatemala, Honduras y Nicaragua (Castillo et al., 2019)