“There is no such thing as single issue struggles”: UndocuQueer Students in Higher Education

• Immigration remains a controversial topic dominating domestic and international conversations about borders, migrants, and human rights. • The undocuqueer movement and identity evolved from the immigrant rights movement of the early 2000s • Undocuqueer immigrants are those who identify as undocumented and queer • According to the Perez (2014), approximately 80,000 undocumented teens turn 18 every year, with 65,000 graduating from high school (cited by the Department of Education 2015, p. 3). • only 54% of undocumented teens earn a high school degree, compared to 82% of their peers who earn it. • Extant research on this topic is limited; most of the research conducted on undocumented students does not overtly mention gender and sexuality, even though sexuality and gender are important parts of social identities. • Yang (n.d.) finds “prejudice and discrimination in schools creates a stigmatizing and stressful social environment for undocumented and for queer students” because the intersections of these two identities can compound the impact of this environment, resulting in an unmet need for support and nurturance as “one of the most poorly accounted for groups on campuses” (Yang, p. 2)

“There’s Life Beyond the Strip”: Immigrant Rights Activism and Spatial Resistance in Las Vegas, Nevada

This research project examines immigrant rights activism in Las Vegas, Nevada and asks: 1. How did Las Vegas activists engage in spatial resistance through their involvement in the immigrant rights movement beginning in 2006? 2. What organizing methods and/or tactics did they utilize? And 3. What did it mean to engage in immigrant rights activism in Las Vegas, an internationally-renowned tourist destination? To create an interdisciplinary frame for this research project, I bridge scholarship across different disciplines and subjects, from Las Vegas history, to immigration studies, and geography. I draw on qualitative interviews with immigrant rights organizers and maps of Las Vegas created during the interview process to argue that Las Vegas immigrant rights organizing was spatial resistance to illegality, racism, and classism as it was produced and practiced in Las Vegas. Participants declare that there is life in Las Vegas beyond the Strip, and that Las Vegas has been a site of critical importance and continued resistance through their maps, interviews, and organizing efforts

Isolated elliptical galaxies in the local Universe

We have studied a sample of 89 very isolated, elliptical galaxies at z < 0.08 and compared their properties with elliptical galaxies located in a high-density environment such as the Coma supercluster. Our aim is to probe the role of environment on the morphological transformation and quenching of elliptical galaxies as a function of mass. In addition, we elucidate the nature of a particular set of blue and star-forming isolated ellipticals identified here. We study physical properties of ellipticals such as color, specific star formation rate, galaxy size, and stellar age, as a function of stellar mass and environment based on SDSS data. We analyze the blue star-forming isolated ellipticals in more detail, through photometric characterization using GALFIT, and infer their star formation history using STARLIGHT. Among the isolated ellipticals ~ 20% are blue, 8% are star forming, and ~ 10% are recently quenched, while among the Coma ellipticals ~ 8% are blue and just <= 1% are star forming or recently quenched. There are four isolated galaxies (~ 4.5%) that are blue and star forming at the same time. These galaxies, with masses between 7 x 10^9 and 2 x 10^10 h-2 M_sun, are also the youngest galaxies with light-weighted stellar ages <= 1 Gyr and exhibit bluer colors toward the galaxy center. Around 30-60% of their present-day luminosity, but only < 5% of their present-day mass, is due to star formation in the last 1 Gyr. The processes of morphological transformation and quenching seem to be in general independent of environment since most of elliptical galaxies are 'red and dead', although the transition to the red sequence should be faster for isolated ellipticals. In some cases, the isolated environment seems to propitiate the rejuvenation of ellipticals by recent (< 1 Gyr) cold gas accretion.Comment: 23 pages, 15 figures (16 pages and 9 figures without appendices). A&A, in pres

Propuesta de alternativas de mejoramiento y aumento de producción en planta productora de polvo de manzana deshidratada

225 p.El presente estudio se desarrolla en una empresa ubicada en la región del Maule que se dedica a la producción de manzana deshidratada y polvo de manzana deshidratada. En particular, la problemática a abordar se encuentra en el último proceso anteriormente señalado, siendo la principal, el gran porcentaje de pérdidas en el sistema, llegando a ser éstas un 9% de la materia prima ingresada, lo que se presume ocurre debido al bajo control. Por consiguiente, el objetivo buscado es disminuirlas en un porcentaje considerable. Además, y como una forma de enriquecer las propuestas de solución, se diseñan diferentes alternativas de aumento de la producción en diferentes escenarios. La metodología a seguir, consta de cuatro fases: conocer el proceso, hacer un diagnóstico de la situación actual, con la información recabada diseñar diferentes alternativas de solución y por último realizar la correspondiente evaluación económica. Para conocer el proceso, se deben tener conocimientos de operaciones unitarias y gestión de operaciones, y con ello entender las diferentes etapas, procesos, características técnicas de los equipos y además saber interpretar diagramas de flujo y localización física (layout). En la elaboración del diagnóstico, se ocupa el diagrama causa – efecto, el que se confecciona en base a entrevistas hechas a los mismos trabajadores. Se miden las capacidades de los diferentes procesos, además de los tiempos muertos generados en el proceso. Estas mediciones están orientadas en un marco general de órdenes de magnitud de los tiempos necesarios para completar un batch de producto terminado. Se diseñan dos alternativas que se centran en disminuir las pérdidas, las que se enfocan en rediseñar los procesos. Luego, una alternativa donde se utilizan los métodos de manufactura esbelta 5s y SMED, dando así orden y estandarización a los procesos y procedimientos. Se diseñan puntos de control tanto de procesos como de calidad y diversos registros. Para finalizar, se proponen dos escenarios de crecimiento de la producción, tema que se aborda usando “Teoría de Restricciones” (Theory of Constraints). Para concluir, según los escenarios estudiados, es posible disminuir las pérdidas en un mínimo de 56%, aumentar la producción hasta un 330%, disminuir los tiempos muertos en un 58% y aumentar los ingresos en un 114% con un alza diferencial de costos de $486MM./Abstract: The present study develops at a company located at the Maule's region. This company dedicates the production of dehydrated apple and dehydrated apple dust. In particular, the problem to aboard find itself in the second mentioned process, being the principal, the great percentage of losses in the system, becoming these 9$486MM

Influence of the chain length of surfactant in the modification of zeolites and clays. Removal of atrazine from water solutions

Influence of the chain length of surfactant in the modification of zeolites and clays. Removal of atrazine from water solutionsRemoval potentials of a surfactant modified zeolite (SMZ) and clay (SMC) for atrazine adsorption were evaluated. Materials were modified with hexadecyl trimethyl ammonium bromide (HDTMABr) and benzyl octadecyl dimethyl ammonium (BODA) chloride considering the critical micellar concentration (CMC) of each one (0.94 and 0.041 meq/L, respectively). The influence of the surfactant was analyzed in detail, particularly the formation of surfactant layers (complete or partial) connected with the length of the surfactant tail (16 and 18 methyl groups or number of carbons in the chain). Raw materials were characterized by XRD and Fourier transform infrared spectroscopy (FTIR), SMZ and SMC were analyzed by FTIR. Results obtained from kinetic adsorption experiments shown that equilibrium time is less for materials modified with HDTMA (8 h) than materials with BODA (10 and 12 h). Materials modified with the largest chain surfactant (BODA) showed more resistance to atrazine masse transference. The chemisorption was presented in the adsorption mechanisms of atrazine and adsorbent materials. Based on the results of adsorption isotherms Langmuir isotherms showed the better correlation coefficients value. The qmax is greater for materials modified with BODA (0.9232 and 4.2448 mg/g) than for materials modified with HDTMA (0.6731 and 3.9121 mg/g). Therefore, SMZ and SMC modified with the largest chain surfactant has more affinity for the pesticide. The removal process at high concentration of atrazine depends of the partition process but at lower concentration, it occurs not only by this process but also by absorption process

Influence of the chain length of surfactant in the modification of zeolites and clays. Removal of atrazine from water solutions

Influence of the chain length of surfactant in the modification of zeolites and clays. Removal of atrazine from water solutionsRemoval potentials of a surfactant modified zeolite (SMZ) and clay (SMC) for atrazine adsorption were evaluated. Materials were modified with hexadecyl trimethyl ammonium bromide (HDTMABr) and benzyl octadecyl dimethyl ammonium (BODA) chloride considering the critical micellar concentration (CMC) of each one (0.94 and 0.041 meq/L, respectively). The influence of the surfactant was analyzed in detail, particularly the formation of surfactant layers (complete or partial) connected with the length of the surfactant tail (16 and 18 methyl groups or number of carbons in the chain). Raw materials were characterized by XRD and Fourier transform infrared spectroscopy (FTIR), SMZ and SMC were analyzed by FTIR. Results obtained from kinetic adsorption experiments shown that equilibrium time is less for materials modified with HDTMA (8 h) than materials with BODA (10 and 12 h). Materials modified with the largest chain surfactant (BODA) showed more resistance to atrazine masse transference. The chemisorption was presented in the adsorption mechanisms of atrazine and adsorbent materials. Based on the results of adsorption isotherms Langmuir isotherms showed the better correlation coefficients value. The qmax is greater for materials modified with BODA (0.9232 and 4.2448 mg/g) than for materials modified with HDTMA (0.6731 and 3.9121 mg/g). Therefore, SMZ and SMC modified with the largest chain surfactant has more affinity for the pesticide. The removal process at high concentration of atrazine depends of the partition process but at lower concentration, it occurs not only by this process but also by absorption process