29 research outputs found
O impacto da escolaridade sobre a distribuição de renda
Este trabalho investiga o impacto da escolaridade sobre a distribuição de renda do trabalho de Estados/ regiões do Brasil, usando um método semiparamétrico, seguindo DiNardo, Fortin e Lemieux (1996) e informações da PNAD de 1999. Foram construídas densidades contrafactuais, reponderando a distribuição da região/Estado mais pobre (Nordeste/Ceará) pelo perfil de escolaridade da mais rica (Sudeste/São Paulo). Resultados: entre 12% e 36% do diferencial de renda é explicado pelo diferencial de escolaridade; a reponderação pela escolaridade aumentou em cerca de 55% a renda média nos contrafactuais; a renda do contrafactual do Nordeste equivale a 93% da renda média brasileira; quanto mais elevado for o percentil de renda considerado, maior é a contribuição da diferença de escolaridade para a diferença de renda; a dispersão de renda das regiões mais pobres aumenta quando fornecemos a elas o nível de escolaridade das regiões mais ricas, mantendo-se o perfil salarial da região
Decline in subarachnoid haemorrhage volumes associated with the first wave of the COVID-19 pandemic
BACKGROUND: During the COVID-19 pandemic, decreased volumes of stroke admissions and mechanical thrombectomy were reported. The study\u27s objective was to examine whether subarachnoid haemorrhage (SAH) hospitalisations and ruptured aneurysm coiling interventions demonstrated similar declines.
METHODS: We conducted a cross-sectional, retrospective, observational study across 6 continents, 37 countries and 140 comprehensive stroke centres. Patients with the diagnosis of SAH, aneurysmal SAH, ruptured aneurysm coiling interventions and COVID-19 were identified by prospective aneurysm databases or by International Classification of Diseases, 10th Revision, codes. The 3-month cumulative volume, monthly volumes for SAH hospitalisations and ruptured aneurysm coiling procedures were compared for the period before (1 year and immediately before) and during the pandemic, defined as 1 March-31 May 2020. The prior 1-year control period (1 March-31 May 2019) was obtained to account for seasonal variation.
FINDINGS: There was a significant decline in SAH hospitalisations, with 2044 admissions in the 3 months immediately before and 1585 admissions during the pandemic, representing a relative decline of 22.5% (95% CI -24.3% to -20.7%, p\u3c0.0001). Embolisation of ruptured aneurysms declined with 1170-1035 procedures, respectively, representing an 11.5% (95%CI -13.5% to -9.8%, p=0.002) relative drop. Subgroup analysis was noted for aneurysmal SAH hospitalisation decline from 834 to 626 hospitalisations, a 24.9% relative decline (95% CI -28.0% to -22.1%, p\u3c0.0001). A relative increase in ruptured aneurysm coiling was noted in low coiling volume hospitals of 41.1% (95% CI 32.3% to 50.6%, p=0.008) despite a decrease in SAH admissions in this tertile.
INTERPRETATION: There was a relative decrease in the volume of SAH hospitalisations, aneurysmal SAH hospitalisations and ruptured aneurysm embolisations during the COVID-19 pandemic. These findings in SAH are consistent with a decrease in other emergencies, such as stroke and myocardial infarction
Low-cost automatic activity data recording system
We describe a low-cost, high quality device capable of monitoring indirect activity by detecting touch-release events on a conducting surface, i.e., the animal's cage cover. In addition to the detecting sensor itself, the system includes an IBM PC interface for prompt data storage. The hardware/software design, while serving for other purposes, is used to record the circadian activity rhythm pattern of rats with time in an automated computerized fashion using minimal cost computer equipment (IBM PC XT). Once the sensor detects a touch-release action of the rat in the upper portion of the cage, the interface sends a command to the PC which records the time (hours-minutes-seconds) when the activity occurred. As a result, the computer builds up several files (one per detector/sensor) containing a time list of all recorded events. Data can be visualized in terms of actograms, indicating the number of detections per hour, and analyzed by mathematical tools such as Fast Fourier Transform (FFT) or cosinor. In order to demonstrate method validation, an experiment was conducted on 8 Wistar rats under 12/12-h light/dark cycle conditions (lights on at 7:00 a.m.). Results show a biological validation of the method since it detected the presence of circadian activity rhythm patterns in the behavior of the rat
Low-cost automatic activity data recording system
We describe a low-cost, high quality device capable of monitoring indirect activity by detecting touch-release events on a conducting surface, i.e., the animal's cage cover. In addition to the detecting sensor itself, the system includes an IBM PC interface for prompt data storage. The hardware/software design, while serving for other purposes, is used to record the circadian activity rhythm pattern of rats with time in an automated computerized fashion using minimal cost computer equipment (IBM PC XT). Once the sensor detects a touch-release action of the rat in the upper portion of the cage, the interface sends a command to the PC which records the time (hours-minutes-seconds) when the activity occurred. As a result, the computer builds up several files (one per detector/sensor) containing a time list of all recorded events. Data can be visualized in terms of actograms, indicating the number of detections per hour, and analyzed by mathematical tools such as Fast Fourier Transform (FFT) or cosinor. In order to demonstrate method validation, an experiment was conducted on 8 Wistar rats under 12/12-h light/dark cycle conditions (lights on at 7:00 a.m.). Results show a biological validation of the method since it detected the presence of circadian activity rhythm patterns in the behavior of the rat
“It’s a battle you are never going to win”: perspectives from journalists in four countries on how digital media platforms undermine trust in news
The growing prominence of platforms in news consumption has raised scholarly concerns about potential impacts on trust in news, which has declined in many countries. However, less is known about how journalists themselves perceive this relationship, which matters for understanding how they use these technologies. In this paper, we draw on 85 interviews with news workers from four countries in both the Global North and South to examine journalists’ narratives—as metajournalistic discourse—about how platforms impact trust in news. We find that practitioners across all environments express mostly critical ideas about platforms vis-à-vis trust on two different levels. First, they describ platforms as disruptive to journalistic practices in ways that strain traditional norms on which trust is based. Second, they discuss platforms as altering the contexts in which journalistic texts and discourses about journalism circulate, weakening the profession’s authority. Despite these reservations, most continue relying on platforms to reach audiences, highlighting the complex choices they must make in an increasingly platform-dominated media environment. As discourses connecting journalistic practice and meaning, these narratives speak to tensions within journalism as a profession around appropriate norms and practices, and challenges to the profession’s claims to authority
Depth and breadth: How news organisations navigate trade-offs around building trust in news
This report summarises major challenges news organisations face around building and sustaining trust with the public, focusing on four countries with varying media and political systems (Brazil, India, the United Kingdom, and the United States). The analysis draws on nine roundtable conversations held virtually in 2021 with 54 senior newsroom leaders and argues that one of the key questions news outlets face is around whether to build trust broadly with the public or instead to focus on deepening trust with audiences already predisposed to trust them. News organisations evaluated this question differently depending on their mission and business models, with many viewing trust as a means to an end including membership or subscription revenue. While this makes sense for individual outlets given the pressures and incentives they face, the report highlights the potential problem it poses for journalism generally as those who are most disengaged from news get excluded from trust-building initiatives
Overcoming indifference: what attitudes towards news tell us about building trust
This report details findings from an original survey of news audiences in Brazil, India, the United Kingdom, and the United States. It examines attitudes towards media in each country, ideas about how journalists conduct themselves, and views about which sources of information can be trusted online and offline. The report focuses especially on people with minimal trust and finds some patterns across countries: the least trusting are not necessarily the most vocal critics who are often selectively trusting towards particular providers. Instead, the untrusting tend to be the least knowledgeable about journalism, most disengaged from how it is practised, and least interested in the editorial choices publishers make daily when producing the news. The primary challenge news media and journalists face from this part of the public is not hostility, but indifference. Earning their trust calls for a different approach than that required for other segments of the public