Policies and interactional plots in pandemic: school support and rebinding of high school students in Neuquen and Buenos Aires

Covid-19 pandemic altered the forms of traditional schooling and deepened fragmented school trajectories and disengagement in secondary education. Under the imperative of guaranteeing students' pedagogical continuity and reinforcing teaching tasks, the federal program Acompanar Puentes de Igualdad was created, which brought together various actors that make up-even before the pandemic-interactional plots. This article reconstructs the trajectory of the federal program, investigating the translations in the provinces of Neuquen and Buenos Aires through the Escuelas Neuquinas Abiertas and Acompanamiento a las Trayectorias y la Revinculacion programs. Recovering the studies of politics ' trajectories (Ball, 2002), the article analyzes the functioning of this network of educational, governmental and community actors, its incidence in the processes of schooling of youngsters and the reconfigurations of inequalities. In order to do this, federal and jurisdictional regulations and interviews with educational and local actors involved in the implementation of these policies are retrieved.

Low-dose radiotherapy to the lungs using an interventional radiology C-arm fluoroscope: Monte Carlo treatment planning and dose measurements in a postmortem subject.

Objective.The goal of this study was to use Monte Carlo (MC) simulations and measurements to investigate the dosimetric suitability of an interventional radiology (IR) c-arm fluoroscope to deliver low-dose radiotherapy to the lungs.Approach.A previously-validated MC model of an IR fluoroscope was used to calculate the dose distributions in a COVID-19-infected patient, 20 non-infected patients of varying sizes, and a postmortem subject. Dose distributions for PA, AP/PA, 3-field and 4-field treatments irradiating 95% of the lungs to a 0.5 Gy dose were calculated. An algorithm was created to calculate skin entrance dose as a function of patient thickness for treatment planning purposes. Treatments were experimentally validated in a postmortem subject by using implanted dosimeters to capture organ doses.Main results.Mean doses to the left/right lungs for the COVID-19 CT data were 1.2/1.3 Gy, 0.8/0.9 Gy, 0.8/0.8 Gy and 0.6/0.6 Gy for the PA, AP/PA, 3-field, and 4-field configurations, respectively. Skin dose toxicity was the highest probability for the PA and lowest for the 4-field configuration. Dose to the heart slightly exceeded the ICRP tolerance; all other organ doses were below published tolerances. The AP/PA configuration provided the best fit for entrance skin dose as a function of patient thickness (R2 = 0.8). The average dose difference between simulation and measurement in the postmortem subject was 5%.Significance.An IR fluoroscope should be capable of delivering low-dose radiotherapy to the lungs with tolerable collateral dose to nearby organs.

Singularity and Coordination Problems: Pandemic Lessons from 2020

Are there any indications that a Technological Singularity may be on the horizon? In trying to answer these questions, the authors made a small introduction to the area of safety research in artificial intelligence. The authors review some of the current paradigms in the development of autonomous intelligent systems, searching for evidence that may indicate the coming of a possible Technological Singularity. Finally, the authors present a reflection using the COVID-19 pandemic, something that showed that global society's biggest problem in managing existential risks is its lack of coordination skills as a global society. © 2020 Tamkang University, All rights reserved.