Connection between Emission and Absorption Outflows through the Study of Quasars with Extremely-High Velocity Outflows

A recently-discovered class of outflows, extremely high-velocity outflows (EHVOs), may be key to understanding feedback processes as it is likely the most powerful in terms of mass-energy. These EHVOs have been observed at redshifts 1.052 < z_em < 7.641, but the potential connection with outflows in emission had not been studied. We find that EHVOs, albeit their small numbers at the moment, appear to show distinct CIV and HeII properties. In particular, EHVOs are more predominant in quasars with large blueshifts of the CIV emission line, suggesting a connection between emission and absorption outflowing signatures for these extreme outflows. We also find incipient trends with the maximum velocity of the outflows, which is similar to what has been previously found in BALQSOs, but now extending previous studies to speeds up to ~0.2c. We find the bolometric luminosities, Eddington ratios, and black hole masses of our sample are overall very similar from the general quasar population upon considering their CIV emission properties. This is close to the case for HeII EW as we observe a tentative upper limit to the HeII strength for a quasar to host an EHVO. This study shows that extreme outflows such as EHVOs appear in quasars that are clearly a distinct class from the overall BALQSO population, and solidify the relation between outflows observed in emission and in absorption.Comment: 10 pages, 5 figures, accepted for publication in the Astrophysical Journal Letters (submitted Sept 3rd 2022; accepted Sept 26th 2022

Variability in Quasar Broad Absorption Line Outflows I. Trends in the Short-Term versus Long-Term Data

Broad absorption lines (BALs) in quasar spectra identify high velocity outflows that likely exist in all quasars and could play a major role in feedback to galaxy evolution. The variability of BALs can help us understand the structure, evolution, and basic physical properties of the outflows. Here we report on our first results from an ongoing BAL monitoring campaign of a sample of 24 luminous quasars at redshifts 1.2<z<2.9, focusing on C IV 1549 BAL variability in two different time intervals: 4 to 9 months (short-term) and 3.8 to 7.7 years (long-term) in the quasar rest-frame. We find that 39% (7/18) of the quasars varied in the short-term, whereas 65% (15/23) varied in the long-term, with a larger typical change in strength in the long-term data. The variability occurs typically in only portions of the BAL troughs. The components at higher outflow velocities are more likely to vary than those at lower velocities, and weaker BALs are more likely to vary than stronger BALs. The fractional change in BAL strength correlates inversely with the strength of the BAL feature, but does not correlate with the outflow velocity. Both the short-term and long-term data indicate the same trends. The observed behavior is most readily understood as a result of the movement of clouds across the continuum source. If the crossing speeds do not exceed the local Keplerian velocity, then the observed short-term variations imply that the absorbers are <6 pc from the central quasar.Comment: 14 pages, 7 figures, accepted for publication in MNRA

Emergence and Variability of Broad Absorption Line Quasar Outflows

We isolate a set of quasars that exhibit emergent C iv broad absorption lines (BALs) in their spectra by comparing spectra in the SDSS Data Release 7 and the SDSS/BOSS Data Releases 9 and 10. After visually defining a set of emergent BALs, follow-up observations were obtained with the Gemini Observatory for 105 quasars. We find an emergence rate consistent with the previously reported disappearance rate of BAL quasars given the relative numbers of non-BAL and BAL quasars in the SDSS. We find candidate newly emerged BALs are preferentially drawn from among BALs with smaller balnicity indices, shallower depths, larger velocities, and smaller widths. Within two rest-frame years (average) after a BAL has emerged, we find it equally likely to continue increasing in equivalent width in an observation six months later (average) as it is to start decreasing. From the time separations between our observations, we conclude the coherence time-scale of BALs is less than 100 rest-frame days. We observe coordinated variability among pairs of troughs in the same quasar, likely due to clouds at different velocities responding to the same changes in ionizing flux; and the coordination is stronger if the velocity separation between the two troughs is smaller. We speculate the latter effect may be due to clouds having on average lower densities at higher velocities due to mass conservation in an accelerating flow, causing the absorbing gas in those clouds to respond on different timescales to the same ionizing flux variations.Comment: 37 pages, 25 figure

Violencia generizada en las dictaduras latinoamericanas. Miradas desde el trabajo social

La violencia política en las dictaduras del Cono Sur tienen un marcado carácter generizado, siendo utilizada como dispositivo de control y disciplinamiento orientada a perpetuar un orden social de género. La violencia política es una violencia de género ejercida en distintos espacios y contextos, por lo que excede las vivencias en los centros de detención y tortura. El artículo analiza las particularidades de violencia contra las mujeres, la invisibilización de sus testimonios y la omisión de sus protagonismos, debido a una memoria hegemónica masculinizada que privilegia una narrativa androcentrada. Asimismo, se revisan algunas formas de resistencia frente a la violencia política las que se presentan como un continuum de respuestas a nivel vincular y comunitario, resaltando su valor e importancia en la lucha contra la dictadura en el país y en la casa. El escrito concluye con algunas reflexiones sobre la necesidad de preservar la memoria y remirar la actuación profesional del trabajo social en dictadura desde una mirada crítica

THE UNIVERSITY AS A COMMON POOL RESOURCE: a set of resources, moral and cultural values from the Academic Community of Universidad Politécnica Salesiana

This book contains information from Universidad Politecnica Salesiana’s Commons Research Group, created in 2016 to deepen as well as identify the implication and the possibilities of imagining the university as a “common pool resource” . This alternative must be explained because the connection of the use of commons – as explained by Elinor Ostrom in her book Governing the Commons. The evolution of institutions for Collective Action (2011) – with the possibility of reconsidering the university in all areas is not immediate nor casual and, at first, such connection seems odd in a time when we value belonging based on evidence accessible at first sight. In fact, what does a proposal which analyzes community and local government decision making methods regarding common resources have to do with university life? The aim of this preface is to answer this question and explain the connection that encourages and gives meaning to several contributions of this book. Each contribution deepens its derivations in the field of management, decision making and knowledge production

Propuesta de mejora para reducir los costos de producción de balerinas en la empresa de calzado Falbric SAC

RESUMEN Objetivo. Formular una propuesta de mejora para poder reducir los costos de producción en la empresa de calzado FALBRIC S.A.C en la provincia de Trujillo. Metodología. Investigación no experimental, transversal, descriptiva propositiva realizada a los trabajadores del área de producción y personal administrativa de la empresa. Se elaboró una encuesta con 10 preguntas, para poder encontrar los principales problemas que afectan los altos costos de producción, se usaron cuadros y gráficos estadísticos. Resultados. Obtuvimos que los principales problemas son la falta de control en el proceso productivo e indicadores de calidad determinando un costo de perdida de S/. 4,020.00; la falta de indicadores de producción con un costo de pérdida de s/ 652.33 soles; la falta de una planificación de la producción con un costo perdido anual de s/ 12,820.80 soles; la falta de capacitación para los trabajadores con un costo perdido anual de s/ 4,256.21 soles; la inadecuada planificación de adquisición de materiales y/o insumos para el procesos productivo con una pérdida de s/ 6,380.61 soles y por último la ausencia de personal experimentado con un costo de pérdida anual de s/ 4,800.00 soles. Conclusiones. Para los problemas encontrados proponemos las siguientes herramientas de mejora respectivamente Análisis de Modo y Efecto de fallas, Kanban, MRP I, MRP II, Plan de Capacitación y un Análisis de Perfil de Puesto. PALABRAS CLAVE: empresa de calzado, costos de producción, propuesta de mejora