Getting Quechua Closer to Final Users through Knowledge Graphs

Quechua language and Quechua knowledge gather millions of people around the world, especially in several countries in South America. Unfortunately, there are only a few resources available to Quechua communities, and they are mainly stored in PDF format. In this paper, the Quechua Knowledge Graph is envisioned and generated as an effort to get Quechua closer to the Quechua communities, researchers, and technology developers. Currently, there are 553636 triples stored in the Quechua Knowledge Graph, which is accessible on the Web, retrievable by machines, and curated by users. To showcase the deployment of the Quechua Knowledge Graph, use cases and future work are described.Comment: 9 pages, 4 figures, 1 table, submitted to The 9th International Conference on Information Management and Big Data (SIMBig 2022

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 of the Cybele asteroids

The Cybele region, located between the 2J:-1A and 5J:-3A mean-motion resonances, is adjacent and exterior to the asteroid main belt. An increasing density of three-body resonances makes the region between the Cybele and Hilda populations dynamically unstable, so that the Cybele zone could be considered the last outpost of an extended main belt. The presence of binary asteroids with large primaries and small secondaries suggested that asteroid families should be found in this region, but only relatively recently the first dynamical groups were identified in this area. Among these, the Sylvia group has been proposed to be one of the oldest families in the extended main belt. In this work we identify families in the Cybele region in the context of the local dynamics and non-gravitational forces such as the Yarkovsky and stochastic YORP effects. We confirm the detection of the new Helga group at $\simeq$3.65~AU, that could extend the outer boundary of the Cybele region up to the 5J:-3A mean-motion resonance. We obtain age estimates for the four families, Sylvia, Huberta, Ulla and Helga, currently detectable in the Cybele region, using Monte Carlo methods that include the effects of stochastic YORP and variability of the Solar luminosity. The Sylvia family should be $T = 1220 \pm 40$ Myr old, with a possible older secondary solution. Any collisional Cybele group formed prior to the late heavy bombardment would have been most likely completely dispersed in the jumping Jupiter scenario of planetary migration.Comment: This paper has 13 pages, 14 figures, and 4 tables. Accepted for publication in MNRA

On the oldest asteroid families in the main belt

Asteroid families are groups of minor bodies produced by high-velocity collisions. After the initial dispersions of the parent bodies fragments, their orbits evolve because of several gravitational and non-gravitational effects,such as diffusion in mean-motion resonances, Yarkovsky and YORP effects, close encounters of collisions, etc. The subsequent dynamical evolution of asteroid family members may cause some of the original fragments to travel beyond the conventional limits of the asteroid family. Eventually, the whole family will dynamically disperse and no longer be recognizable. A natural question that may arise concerns the timescales for dispersion of large families. In particular, what is the oldest still recognizable family in the main belt? Are there any families that may date from the late stages of the Late Heavy Bombardment and that could provide clues on our understanding of the primitive Solar System? In this work, we investigate the dynamical stability of seven of the allegedly oldest families in the asteroid main belt. Our results show that none of the seven studied families has a nominally mean estimated age older than 2.7 Gyr, assuming standard values for the parameters describing the strength of the Yarkovsky force. Most "paleo-families" that formed between 2.7 and 3.8 Gyr would be characterized by a very shallow size-frequency distribution, and could be recognizable only if located in a dynamically less active region (such as that of the Koronis family). V-type asteroids in the central main belt could be compatible with a formation from a paleo-Eunomia family.Comment: 9 pages, 5 figures, 5 tables. Accepted for publication in MNRA

The Rafita asteroid family

The Rafita asteroid family is an S-type group located in the middle main belt, on the right side of the 3J:-1A mean-motion resonance. The proximity of this resonance to the family left side in semi-major axis caused many former family members to be lost. As a consequence, the family shape in the $(a,1/D)$ domain is quite asymmetrical, with a preponderance of objects on the right side of the distribution. The Rafita family is also characterized by a leptokurtic distribution in inclination, which allows the use of methods of family age estimation recently introduced for other leptokurtic families such as Astrid, Hansa, Gallia, and Barcelona. In this work we propose a new method based on the behavior of an asymmetry coefficient function of the distribution in the $(a,1/D)$ plane to date incomplete asteroid families such as Rafita. By monitoring the time behavior of this coefficient for asteroids simulating the initial conditions at the time of the family formation, we were able to estimate that the Rafita family should have an age of $490\pm200$ Myr, in good agreement with results from independent methods such as Monte Carlo simulations of Yarkovsky and Yorp dynamical induced evolution and the time behaviour of the kurtosis of the $\sin{(i)}$ distribution. Asteroids from the Rafita family can reach orbits similar to 8\% of the currently known near Earth objects. $\simeq$1\% of the simulated objects are present in NEO-space during the final 10 Myr of the simulation, and thus would be comparable to objects in the present-day NEO population.Comment: Accepted 2017 January 19. Received 2017 January 17; in original form 2016 September

Variabilité génétique chez des populations sauvages et domestiques de Triatoma infestans, vecteur majeur de la maladie de Chagas en Bolivie : rapport de stage

La maladie de Chagas est une infection due à #Trypanosoma cruzi#, transmise par des insectes hématophages dont le principal vecteur est #Triatoma infestans#. La mise en place de nouvelles stratégies de lutte contra ces vecteurs en cas d'échecs dans certaines régions, nécessite une meilleure connaissance de l'écologie et de la biologie, de même que de la génétique de ces populations de vecteurs permettant de mieux comprendre les processus de domestication. Cette étude a pour objectif d'analyser les séquences de gènes à vitesse d'évolution différente afin d'identifier les haplotypes et allèles spécifiques des populations sauvages et domestiques. (Résumé d'auteur

Bioadsorción del Pb+2 por las biomasas de Aspergillus niger y Aspergillus fumigatus aislados del Callao

Publicación a texto completo no autorizada por el autorInvestiga la bioadsorcion del plomo (II) usando como material bioadsorbente las biomasas fúngicas Aspergillus niger y Aspergillus fumigatus aislados del pueblo joven Puerto Nuevo-callao. El material bioadsorbente se obtuvo de las muestras tomadas de la zona contaminada del pueblo joven Puerto Nuevo-Callao. El material tratado fue secado en una estufa a la temperatura de 80 °C por 2 horas. Se determinó la bioadsorcion de plomo (II) en solución por las biomasas celular de dos hongos por el método instrumental de espectroscopia de absorción atómica. Los experimentos sobre el efecto del pH en el proceso de bioadsorción de Pb (II) por las biomasas fúngicas demostraron que el pH óptimo es 5.0; así como el experimento del efecto de la temperatura optima por las biomasas fúngicas demostraron una temperatura optima de 25°C para la biomasa fúngicas; la concentración del plomo (II) que presenta la mejor bioadsorcion es a 1000ppm. Del estudio de la cinética del proceso de bioadsorción, se determinó que la biomasa de Aspergillus niger 98% fue más eficiente en la remoción del plomo (II) que el Aspergillus fumigatus 96%. El equilibrio se alcanzó a las 100 minutos del inicio del proceso de bioadsorción logrando un porcentaje de remoción de Plomo (II) para Aspergillus niger 98% y para Aspergillus fumigatus 96%. Se concluye que las biomasas fúngicas remueven eficientemente plomo (II) en solución y pueden utilizarse para descontaminar nichos acuáticos contaminados con este metal.Tesi

Characterization of the Vertical Structure of Latent Heating in the East Pacific ITCZ Using the TRMM PR and CLOUDSAT CPR

In the East Pacific intertropical convergence zone (ITCZ), Tropical Rainfall Measuring Mission (TRMM) radar-based latent heating retrievals suggest a top-heavy structure; however, the TRMM precipitation radar (PR) underestimates light precipitation (< 0.4 mm h?1) from shallow convection and the low-level latent heating associated with this precipitation. Thus, this study uses observations of stratiform and deep convective precipitation from the TRMM PR and shallow precipitation from the more sensitive CloudSat cloud profiling radar (CPR) to assess the seasonal vertical structure of latent heating in the East Pacific ITCZ for 1998-2015. This study is complemented with three reanalysis datasets (MERRA2, ERA-Interim, and NCEP NCAR) to analyze the meridional circulation changes linked to variations in the ITCZ heating profiles. There is a distinct seasonal cycle in the TRMM/CloudSat latent heating profiles in the East Pacific ITCZ. During DJF, latent heating peaks around 850 hPa because of the predominance of rain from shallow convection. The heating peak rises to 700 hPa during MAM as the contribution from deep convective rain increases along with the presence of a mid-level inflow south the ITCZ. During JJA and SON, stratiform precipitation increases significantly and heating is more equally distributed throughout the troposphere with double peaks at 700 and 400 hPa; the lower peak is related to the strong shallow overturning circulation. In addition, the East Pacific has a meridional slope in latent heating throughout the year as a result of the prevalence of shallow convection in the southern part of the ITCZ and deep convection in the northern part of the ITCZ. This slope is weakest during MAM when a double ITCZ structure exists. Reanalyses only capture certain aspects of this seasonal cycle in the East Pacific ITCZ. While the reanalyses agree that the most bottomheavy heating occurs in DJF and the most top-heavy heating occurs in JJA, they greatly underestimate the amount of heating aloft compared to the satellite retrievals throughout the year. This disagreement has serious implications for how the meridional circulation is captured in this region with reanalyses showing varying ability in representing the shallow meridional circulation and deeper Hadley cell overturning in the East Pacific

Tuki Walmikuna: Quechua Women, Domestic Labor, and Life Hopes in Peru

This article discusses Quechua women, labor, and educational opportunity in Peru and explores the relationship between coloniality and violence, Quechua racialized labor and Spanish exploitation, and unequal access to formal schooling, which have impacted generations of Quechua women. Drawing from a larger narrative project with three generations of Quechua grandmothers, daughters, and granddaughters from the Andean highlands of Peru, the article revisits the Agrarian Reform Law era, foundational and gendered research gaining prominence through the 1970s, and offers insights regarding life hopes gained through newly emerging testimonies