Do Not Close My School : Facebook, Occupations and Demonstrations for Promoting Social Change

This article describes how secondary education students from the state of São Paulo, Brazil, protested against the closure of ninety-four schools of public educational system. The movement named ‘Do not close my school’ was a combination of online protest, using Facebook pages, occupy-type protest, in which students occupied more than 200 schools, and demonstrations, which occurred in different cities of the state. It was a movement organized by the students, with no official support of school managers, and lasted more than two months. We analyse the activities involved in the ‘Do not close my school’ movement under a Cultural-Historical Activity Theory framework, and we discuss how the concept of collaborative agency is important for the development of such a protest. As data, we use the content of pages on Facebook from fifty-six groups related to the school occupation and 111 official pages, also on Facebook, from the schools. We performed a multimodal and network analysis of the data in order to understand how the movement developed which results were obtained by the students. Our findings suggest that by acting collaboratively students were able to reach satisfactory results from their protests. In addition, they expanded the activities in their groups on Facebook to other contexts, like organizing events in their schools or using them for other social movements.Peer reviewe

High intensity interval training improves health-related quality of life in adults and older adults with diagnosed cardiovascular risk

info:eu-repo/semantics/publishedVersio

Mortality Predictors in Renal Transplant Recipients with Severe Sepsis and Septic Shock

Introduction: the growing number of renal transplant recipients in a sustained immunosuppressive state is a factor that can contribute to increased incidence of sepsis. However, relatively little is known about sepsis in this population. the aim of this single-center study was to evaluate the factors associated with hospital mortality in renal transplant patients admitted to the intensive care unit (ICU) with severe sepsis and septic shock.Methods: Patient demographics and transplant-related and ICU stay data were retrospectively collected. Multiple logistic regression was conducted to identify the independent risk factors associated with hospital mortality.Results: A total of 190 patients were enrolled, 64.2% of whom received kidneys from deceased donors. the mean patient age was 51 +/- 13 years (males, 115 [60.5%]), and the median APACHE II was 20 (16-23). the majority of patients developed sepsis late after the renal transplantation (2.1 [0.6-2.3] years). the lung was the most common infection site (59.5%). Upon ICU admission, 16.4% of the patients had = 2 organ failures at admission, and 27.9% experienced septic shock within the first 24 hours of ICU admission. the overall hospital mortality rate was 38.4%. in the multivariate analysis, the independent determinants of hospital mortality were male gender (OR = 5.9; 95% CI, 1.7-19.6; p = 0.004), delta SOFA 24 h (OR = 1.7; 95% CI, 1.2-2.3; p = 0.001), mechanical ventilation (OR = 30; 95% CI, 8.8-102.2; p<0.0001), hematologic dysfunction (OR = 6.8; 95% CI, 2.0-22.6; p = 0.002), admission from the ward (OR = 3.4; 95% CI, 1.2-9.7; p = 0.02) and acute kidney injury stage 3 (OR = 5.7; 95% CI, 1.9-16.6; p = 0.002).Conclusions: Hospital mortality in renal transplant patients with severe sepsis and septic shock was associated with male gender, admission from the wards, worse SOFA scores on the first day and the presence of hematologic dysfunction, mechanical ventilation or advanced graft dysfunction.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Hospital do RimUniversidade Federal de São Paulo, Unidade Transplante, Disciplina Nefrol, São Paulo, BrazilUniversidade Federal de São Paulo, Disciplina Anestesiol Dor & Terapia Intens, São Paulo, BrazilUniversidade Federal de São Paulo, Unidade Transplante, Disciplina Nefrol, São Paulo, BrazilUniversidade Federal de São Paulo, Disciplina Anestesiol Dor & Terapia Intens, São Paulo, BrazilWeb of Scienc

Estudo sobre soldagem de revestimento utilizando o processo laser cladding / Study on coating welding using the laser cladding process

A abordagem deste trabalho apresenta uma aplicação altamente eficaz, aliada a características únicas do processo de soldagem de revestimento por Laser. Tecnologias inovadoras são constantemente empregadas em vários ramos da indústria, mas principalmente no segmento de óleo e gás. Tal aplicação contribui para o aumento da produtividade de captação e processamento do petróleo. Dentre essas tecnologias, destaca-se o processo de soldagem de revestimento por laser cladding, sendo hoje uma ferramenta indispensável em virtude das vantagens em relação aos demais processos de recobrimento. Nesse contexto, o presente trabalho objetivou a realização de uma solda pelo processo laser cladding, utilizando o aço médio carbono AISI/SAE 4140 como substrato e pó de Inconel 625 como revestimento. Diversas análises foram realizadas para avaliar o material soldado, como caracterização macro e microestrutural, medidas de dureza e testes eletroquímicos. Os resultados mostraram que a solda realizada não apresentou defeitos de qualquer natureza. As microestruturas encontradas nas diferentes regiões da solda produziram valores adequados de dureza, sendo dispensável qualquer tratamento térmico pós soldagem. Os testes eletroquímicos destacaram-se com relação à investigação no meio ácido, onde observou-se que a corrente galvânica em meio de HCl 0,1 mol/L é aproximadamente dez vezes maior que no meio neutro de cloreto

PROPAGAÇÃO IN VITRO DE CYRTHOPODIUM SAINTGLERIANUM COM CARVÃO ATIVADO

Carvão ativado é um componente muito explorado na semeadura in vitro de orquídeas. Objetivou-se avaliar o crescimento in vitro de Cyrtopodium saintglerianum com diferentes concentrações de carvão ativado. Protocormos com 90 dias após a semeadura (0,5 cm de comprimento) foram recultivados em meio de cultura ½ MS entre os tratamentos constituídos diferentes doses de carvão ativado (0; 1,0 e 2,0 g L-1). As plântulas foram recultivadas mensalmente nesses tratamentos por mais 150 dias e, ao término do cultivo in vitro, as plântulas foram retiradas dos frascos e analisadas características biométricas. A maior eficiência para o crescimento in vitro foi verificada na concentração de 2,0 g L-1 de carvão ativado, com maior enraizamento e massa fresca das plãntulas. Portanto, a adição de carvão ativado no meio de cultura é recomendada para a propagação in vitro de Cyrtopodium saintglerianum

Liquid vs Solid Culture Medium to Evaluate Proportion and Time to Change in Management of Suspects of Tuberculosis-A Pragmatic Randomized Trial in Secondary and Tertiary Health Care Units in Brazil.

BACKGROUND: The use of liquid medium (MGIT960) for tuberculosis (TB) diagnosis was recommended by WHO in 2007. However, there has been no evaluation of its effectiveness on clinically important outcomes. METHODS AND FINDINGS: A pragmatic trial was carried out in a tertiary hospital and a secondary health care unit in Rio de Janeiro City, Brazil. Participants were 16 years or older, suspected of having TB. They were excluded if only cerebral spinal fluid or blood specimens were available for analysis. MGIT960 technique was compared with the Lowenstein-Jensen (LJ) method for laboratory diagnosis of active TB. Primary outcome was the proportion of patients who had their initial medical management changed within 2 months after randomisation. Secondary outcomes were: mean time for changing the procedure, patient satisfaction with the overall treatment and adverse events. Data were analysed by intention-to-treat. Between April 2008 and September 2011, 693 patients were enrolled (348 to MGIT, 345 to LJ). Smear and culture results were positive for 10% and 15.7% of participants, respectively. Patients in the MGIT arm had their initial medical management changed more frequently than those in the LJ group (10.1% MGIT vs 3.8% LJ, RR 2.67 95% CI 1.44-.96, p = 0.002, NNT 16, 95% CI 10-39). Mean time for changing the initial procedure was greater in LJ group at both sites: 20.0 and 29.6 days in MGIT group and 52.2 and 64.3 in LJ group (MD 33.5, 95% CI 30.6-36.4, p = 0.0001). No other important differences were observed. CONCLUSIONS: This study suggests that opting for the MGIT960 system for TB diagnosis provides a promising case management model for improving the quality of care and control of TB. TRIAL REGISTRATION: Controlled-Trials.com ISRCTN79888843

Nitrate reductase activity in the different phenophases of ‘palmer’ mango cultivated in the semiarid

Nitrate reductase is the enzyme that catalyzes the first reduction reaction in the nitrate assimilation process, an important nitrogen (N) source. This element is one of the macronutrients required in greater amounts by mango (Mangifera indica L.), exerting a great influence on the growth and development of the plants. In this context, this work aimed to evaluate nitrate reductase activity (NRa) throughout the day and characterize it in leaves of 1st and 2nd vegetative flushes and young roots of ‘Palmer’ mango cultivated in the Brazilian semiarid. For each phenophase, leaves and roots were randomly collected from six plants in the orchard. A completely randomized design was employed, with four replications, and the NRa quantification was based on the in vivo evaluation method. The enzyme activity was maximum in the period of greatest solar radiation or from 10 a.m. to 11 a.m. The 2nd flush leaves and young the roots constitute the main nitrate assimilation sites in the mango crop in comparation with 1st flush leaves. Fertilization with nitrate or potassium sources in the different phenological phases benefit the NRa, which remains maximum during reproductive phase than vegetative phase