Incorporação de resíduos cerâmicos vidrados em argamassas bastardas: estudo de propriedades físicas e mecânicas

Dissertação de Natureza Científica para obtenção do grau de Mestre em Engenharia Civil Perfil de EdificaçõesA conservação do património edificado constitui no presente, a memória de uma civilização. O conhecimento da composição e comportamento dos revestimentos antigos é importante para garantir a conservação do património edificado através das intervenções de conservação e reabilitação. A presente dissertação tem como objetivo o estudo do desempenho de argamassas bastardas de cal aérea e cimento com substituição de cal aérea por resíduo cerâmico vidrado. As argamassas formuladas foram sujeitas a cura laboratorial. Realizou-se a caracterização física, e mecânica de modo a avaliar o seu desempenho ao longo do tempo. O sector da construção pauta a sua atividade por elevados impactos ambientais ao nível da extração de elevadas quantidades de matérias-primas não renováveis, de elevados consumos energéticos e das consequentes e elevadas emissões de gases responsáveis por efeito de estufa. Além dos enormes excedentes que provem da indústria que normalmente seguem para aterro. De forma a aproveitar esses excedentes de algumas indústrias, nomeadamente da cerâmica procedeu-se à transformação de produtos excedentes em resíduo, de forma a ser possível a sua incorporação argamassas, uma vez que na antiguidade, no império romano já se efetuava esta incorporação. A produção de cimento tem elevados impactos ambientais, deste modo a redução da sua utilização através da incorporação de outros ligantes de natureza natural (cal aérea) e a possível substituição desses recursos naturais por excedentes irá aumentar a sustentabilidade do sector.In the present, the conservation of the built heritage constitutes the memory of a civilization. The knowledge of composition and performance of the old coverings is crucial to ensure the preservation of the built heritage through intervention of conservation and rehabilitation. This thesis aims to study the performance of aerial lime based mortars and cement with replacement of the aerial lime with glazed ceramic waste. The bastard mortars have characteristics well-suited for these functions, once incorporates the best features of air lime and cement. The construction sector bases its activity by high environmental impacts, because of the extraction of non-renewable raw material, high energy consumption and high emission of gases responsible for the greenhouse effect. In addition to huge surpluses that comes from the industry and that usually goes to landfill. In order to take advantage of the surpluses in some industries, including ceramics, it was proceeded the transformation of surpluses in residue. In this way was possible to incorporate the residues in mortars, as the Roman Empire in ancient time proceeded. The production of cement has high environmental impacts, thereby reducing their use by incorporating other ligands with natural source (air lime) and the possible replacement of these natural resources by surpluses will increase the sustainability of the sector. The incorporation of residues leads to the study of new mortars formulations. The formulated mortars were subject to a process of laboratory cure. It was reported over time, the performance, the physical and mechanical characterization of the mortars. In the properties studied was recorded a good performance of the mortars, due to the placement of the ceramic powder

The impact of mental health recovery narratives on recipients experiencing mental health problems: Qualitative analysis and change model.

BACKGROUND: Mental health recovery narratives are stories of recovery from mental health problems. Narratives may impact in helpful and harmful ways on those who receive them. The objective of this paper is to develop a change model identifying the range of possible impacts and how they occur. METHOD: Semi-structured interviews were conducted with adults with experience of mental health problems and recovery (n = 77). Participants were asked to share a mental health recovery narrative and to describe the impact of other people's recovery narratives on their own recovery. A change model was generated through iterative thematic analysis of transcripts. RESULTS: Change is initiated when a recipient develops a connection to a narrator or to the events descripted in their narrative. Change is mediated by the recipient recognising experiences shared with the narrator, noticing the achievements or difficulties of the narrator, learning how recovery happens, or experiencing emotional release. Helpful outcomes of receiving recovery narratives are connectedness, validation, hope, empowerment, appreciation, reference shift and stigma reduction. Harmful outcomes are a sense of inadequacy, disconnection, pessimism and burden. Impact is positively moderated by the perceived authenticity of the narrative, and can be reduced if the recipient is experiencing a crisis. CONCLUSIONS: Interventions that incorporate the use of recovery narratives, such as peer support, anti-stigma campaigns and bibliotherapy, can use the change model to maximise benefit and minimise harms from narratives. Interventions should incorporate a diverse range of narratives available through different mediums to enable a range of recipients to connect with and benefit from this material. Service providers using recovery narratives should preserve authenticity so as to maximise impact, for example by avoiding excessive editing

Felony Murder and Capital Punishment: an Examination of the Deterrence Question

A proper test of the deterrent effect of the death penalty must consider capital homicides. However, the criterion variable in most investigations has been total homicides—most of which bear no legal or theoretical relationship to capital punishment. To address this fundamental data problem, this investigation used Federal Bureau of Investigation data for 1976–1987 to examine the relationship between capital punishment and felony murder, the most common type of capital homicide. We conducted time series analyses of monthly felony murder rates, the frequency of executions, and the amount and type of television coverage of executions over the period. The analyses revealed occasional departures (for vehicle theft and narcotics killings) from the null hypotheses. However, on balance, and in line with the vast majority of capital punishment studies, this investigation found no consistent evidence that executions and the television coverage they receive are associated significantly with rates for total, index, or different types of felony murder

Using trained dogs and organic semi-conducting sensors to identify asymptomatic and mild SARS-CoV-2 infections: an observational study

BACKGROUND: A rapid, accurate, non-invasive diagnostic screen is needed to identify people with SARS-CoV-2 infection. We investigated whether organic semi-conducting (OSC) sensors and trained dogs could distinguish between people infected with asymptomatic or mild symptoms, and uninfected individuals, and the impact of screening at ports-of-entry. METHODS: Odour samples were collected from adults, and SARS-CoV-2 infection status confirmed using RT-PCR. OSC sensors captured the volatile organic compound (VOC) profile of odour samples. Trained dogs were tested in a double-blind trial to determine their ability to detect differences in VOCs between infected and uninfected individuals, with sensitivity and specificity as the primary outcome. Mathematical modelling was used to investigate the impact of bio-detection dogs for screening. RESULTS: About, 3921 adults were enrolled in the study and odour samples collected from 1097 SARS-CoV-2 infected and 2031 uninfected individuals. OSC sensors were able to distinguish between SARS-CoV-2 infected individuals and uninfected, with sensitivity from 98% (95% CI 95–100) to 100% and specificity from 99% (95% CI 97–100) to 100%. Six dogs were able to distinguish between samples with sensitivity ranging from 82% (95% CI 76–87) to 94% (95% CI 89–98) and specificity ranging from 76% (95% CI 70–82) to 92% (95% CI 88–96). Mathematical modelling suggests that dog screening plus a confirmatory PCR test could detect up to 89% of SARS-CoV-2 infections, averting up to 2.2 times as much transmission compared to isolation of symptomatic individuals only. CONCLUSIONS: People infected with SARS-CoV-2, with asymptomatic or mild symptoms, have a distinct odour that can be identified by sensors and trained dogs with a high degree of accuracy. Odour-based diagnostics using sensors and/or dogs may prove a rapid and effective tool for screening large numbers of people. Trial Registration NCT04509713 (clinicaltrials.gov)

The James Webb Space Telescope Mission

Twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least $4m$. With the support of their governments in the US, Europe, and Canada, 20,000 people realized that vision as the $6.5m$ James Webb Space Telescope. A generation of astronomers will celebrate their accomplishments for the life of the mission, potentially as long as 20 years, and beyond. This report and the scientific discoveries that follow are extended thank-you notes to the 20,000 team members. The telescope is working perfectly, with much better image quality than expected. In this and accompanying papers, we give a brief history, describe the observatory, outline its objectives and current observing program, and discuss the inventions and people who made it possible. We cite detailed reports on the design and the measured performance on orbit.Comment: Accepted by PASP for the special issue on The James Webb Space Telescope Overview, 29 pages, 4 figure

How to make the economics profession socially useful? (A reaction to George Soros’ lectures and INET’s activities)

The profession of economics does not fulfill its social function to provide people a correct understanding of economic phenomena. In other words, the institution of economics does not work properly. George Soros makes this conclusion in his lectures at the Central European University (Soros, 2010). He sponsored the creation of the Institute for New Economic Thinking (INET) with the objective to change this situation in economics. However activities of the INET are not oriented to change the institution of economics and most of participants in its activities are mainstream economists. This short paper summarizes my ideas in what way it is necessary to change the institution of economics. First, in order to make the profession of economists socially useful, it is necessary to reconsider the methodology and history of economics. At present the former leads the profession in a wrong way and the latter to a great extent justifies this wrong way. Secondly, it is necessary to reform the institution of economics. I define the notion of institution in the following way: an institution is a set of formal and informal rules, and also beliefs, that stand behind these rules, that orient the behaviour of members of a certain community. The rules of the institution of economics relate to the community of university professors and students of economics. These rules provide a framework for developing curricula and syllabi, as well as for the organization of examinations. They define the procedures and directions of economic research, and the criteria for publication of articles in academic economic journals. These rules include formal and informal rules of functioning of professional organizations of economists, such as the American Economic Association. Beliefs that underlie the rules of functioning of the community of academic economists are expressed in different answers to such questions as: What does it mean to undertake economic research? What is the purpose of economic research? What should economists study? How should they carry out the study? In what form should the results of the study be presented? What does it mean to teach economics? What kind of economics should we teach? The answers to these questions, along with formal and informal rules of behaviour based on the answers, together constitute the institutional knowledge of professional economists. Candidates for admission to the profession acquire most of this knowledge during the preparation and defense of PhD dissertations that many do in the framework of post-graduate studies. If someone becomes a member of the profession and does not have this knowledge, or refuses to follow its instructions, then sooner or later she/he will be rejected by the profession. To reform the profession of economists means to reform the institution of economics, i.e. to change their rules and beliefs. I think that the only way for economics to become a socially useful science is the transformation of economics from a kind of applied mathematics (mainstream economics) or social philosophy (heterodox economics) to something similar to social anthropology with its ethnographic method justified in the framework of the constructivist discursive methodology. The methodology that I prone can be expressed very shortly in the following way. The social-economic regularities result from the fact that people behave according to certain socially-constructed rules, and these rules are explained, justified, and kept in mind by telling themselves and others some stories. Taking this statement into consideration, we must agree with the fact that for the identification of social-economic regularities, we must explore and analyse these stories. Modern economics does not study the discourses of economic actors and thereby deprive itself of the ability to understand and predict economic phenomena. The study of discourse is not a deviation from the academic standards which are built into natural sciences, but rather an approximation to it, since almost all social interactions are mediated by language

Dimethyl fumarate in patients admitted to hospital with COVID-19 (RECOVERY): a randomised, controlled, open-label, platform trial

Dimethyl fumarate (DMF) inhibits inflammasome-mediated inflammation and has been proposed as a treatment for patients hospitalised with COVID-19. This randomised, controlled, open-label platform trial (Randomised Evaluation of COVID-19 Therapy [RECOVERY]), is assessing multiple treatments in patients hospitalised for COVID-19 (NCT04381936, ISRCTN50189673). In this assessment of DMF performed at 27 UK hospitals, adults were randomly allocated (1:1) to either usual standard of care alone or usual standard of care plus DMF. The primary outcome was clinical status on day 5 measured on a seven-point ordinal scale. Secondary outcomes were time to sustained improvement in clinical status, time to discharge, day 5 peripheral blood oxygenation, day 5 C-reactive protein, and improvement in day 10 clinical status. Between 2 March 2021 and 18 November 2021, 713 patients were enroled in the DMF evaluation, of whom 356 were randomly allocated to receive usual care plus DMF, and 357 to usual care alone. 95% of patients received corticosteroids as part of routine care. There was no evidence of a beneficial effect of DMF on clinical status at day 5 (common odds ratio of unfavourable outcome 1.12; 95% CI 0.86-1.47; p = 0.40). There was no significant effect of DMF on any secondary outcome

Dimethyl fumarate in patients admitted to hospital with COVID-19 (RECOVERY): a randomised, controlled, open-label, platform trial

Dimethyl fumarate (DMF) inhibits inflammasome-mediated inflammation and has been proposed as a treatment for patients hospitalised with COVID-19. This randomised, controlled, open-label platform trial (Randomised Evaluation of COVID-19 Therapy [RECOVERY]), is assessing multiple treatments in patients hospitalised for COVID-19 (NCT04381936, ISRCTN50189673). In this assessment of DMF performed at 27 UK hospitals, adults were randomly allocated (1:1) to either usual standard of care alone or usual standard of care plus DMF. The primary outcome was clinical status on day 5 measured on a seven-point ordinal scale. Secondary outcomes were time to sustained improvement in clinical status, time to discharge, day 5 peripheral blood oxygenation, day 5 C-reactive protein, and improvement in day 10 clinical status. Between 2 March 2021 and 18 November 2021, 713 patients were enroled in the DMF evaluation, of whom 356 were randomly allocated to receive usual care plus DMF, and 357 to usual care alone. 95% of patients received corticosteroids as part of routine care. There was no evidence of a beneficial effect of DMF on clinical status at day 5 (common odds ratio of unfavourable outcome 1.12; 95% CI 0.86-1.47; p = 0.40). There was no significant effect of DMF on any secondary outcome