Aversão à perda em um mercado acionário virtual: uma abordagem agent-based

Neste trabalho, temos a intenção de contribuir com o debate na área de economia e finanças comportamentais ao realizar um estudo sobre o comportamento do mercado acionário ao incluirmos o viés de comportamento aversão à perda aos agentes que ali operam. Para tanto, apresentamos um modelo baseado em agentes aplicado ao mercado acionário que foi programado em NetLogo, cujo método é, em parte, baseado em modelos de agentes já programados para mercados financeiros artificiais e, ao mesmo tempo, parcialmente novo ao propor a realização de testes com variáveis diferentes das utilizadas por outros autores – a saber: aversão à perda. Os resultados encontrados sugerem que a subjetividade humana presente na tomada de decisão, isto é, quando os agentes possuem aversão à perda, faz com que o movimento do mercado acionário artificial apresente alguns ruídos. Destarte, concluímos que os experimentos realizados nos oferecem indícios de que há certa fragilidade em alguns pressupostos da Hipótese dos Mercados Eficientes

Do new matrix formulations improve resin composite resistance to degradation processes?

The aim of this study was to determine the degradation resistance of three new formulations-silorane-, Ormocer- and dimer-acid-based materials-and compare them to the traditional dimethacrylate-based materials. One silorane- (Filtek P90, P90), one Ormocer- (Ceram-X, CX), one dimer-acid- (N'Durance, ND) and two dimethacrylate-based (Filtek P60, P60; Tetric Ceram, TC) materials were investigated. Water sorption (Wsp) and solubility (Wsl) were determined after the materials were immersed in water for 28 days. Knoop hardness (KH) was determined before and after 24 h immersion in pure ethanol. The flexural-strength (FS) was determined by the bending test after one-week storage in a dry environment or after one-week immersion in pure ethanol. Data were submitted to analysis of variance (ANOVA) and Tukey's test (95%). The three new formulations showed lower Wsp than the dimethacrylate-based formulation. CX (0.50 ± 0.17%) and ND (0.72 ± 0.19%) exhibited the lowest Wsp, whereas P90 (0.02 ± 0.03%) and P60 (0.04 ± 0.03%) showed the lowest Wsl. All resins showed reduced Knoop hardness number (KHN) after ethanol immersion. P60 presented the lowest decrease in KH value (19 ± 5%). TC (48 ± 3%) and P90 (39 ± 9%) showed the highest KHN decrease after ethanol storage. The FS of CX, ND and TC were affected by ethanol storage. The new formulations did not improve the degradation resistance, as compared with the traditional methacrylate-based materials.41041

Quantificação de parâmetros respiratórios em pacientes com epilepsia do lobo temporal

Dysfunction affecting cardiac or pulmonary systems has been postulated as a major factor in sudden death in epilepsy (SUDEP). Whilst the majority of studies of cardiorespiratory function have focused on changes during seizures, here we investigate whether epilepsy influences basal respiratory parameters in patients with temporal lobe epilepsy (TLE) during the interictal period. Spirometry was performed in 10 females and 10 males. Measurements of Vital Capacity (VC), Forced Vital Capacity (FVC), Forced Expiratory Volume in the first second (FEV1) and ratios of FEV1 to FVC (FEV1/FVC) were obtained, and these values were analyzed as percentages of predicted values. None of the patients had chronic obstructive pulmonary disease and no significant alterations in respiratory function tests were found among these patients. No association between seizure frequency, antiepileptic drugs and SUDEP could be found in this study. Although the study did not identify any specific respiratory abnormality in TLE patients during the interictal period, re-evaluation of clinical data on pulmonary disorders in people with epilepsy should be better investigated.Alterações cardíacas e pulmonares têm sido propostas como principais fatores de risco no fenômeno da morte súbita em epilepsia (SUDEP). Enquanto a maioria dos estudos tem verificado as alterações da função cardiorrespiratória durante as crises epilépticas, nosso estudo avaliou a função pulmonar de indivíduos com epilepsia do lobo temporal (ELT) no período interictal. Vinte pacientes com ELT (10 homens e 10 mulheres) participaram de nosso estudo. Nos testes de função pulmonar foram mensurados os seguintes parâmetros: Capacidade Vital Forçada (CVF), Capacidade Vital Lenta (CVL), Volume Expiratório Forçado no primeiro segundo (VEF1) e o Índice VEF1/CVF. Os resultados foram comparados aos valores de normalidade preditos na literatura. Nenhum dos pacientes apresentou doença pulmonar obstrutiva ou restritiva e alterações significativas nos testes de função pulmonar. Não foram encontradas associações entre a freqüência de crises, drogas antiepilépticas e SUDEP. Embora nosso estudo não tenha identificado qualquer anormalidade respiratória específica em indivíduos com ELT durante o período interictal, os dados clínicos sobre transtornos pulmonares em indivíduos com epilepsia devem ser melhor avaliados.Universidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Laboratório de Neurologia ExperimentalUniversidade de Mogi das Cruzes Núcleo de Pesquisas Tecnológicas Laboratório de NeurociênciasUniversidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Departamento de FisiologiaUniversity College of London Institute of Neurology Department of Clinical and Experimental EpilepsyUNIFESP, EPM, Laboratório de Neurologia ExperimentalUNIFESP, EPM, Depto. de FisiologiaSciEL

Genome sequence and effectorome of Moniliophthora perniciosa and Moniliophthora roreri subpopulations

Background: The hemibiotrophic pathogens Moniliophthora perniciosa (witches' broom disease) and Moniliophthora roreri (frosty pod rot disease) are among the most important pathogens of cacao. Moniliophthora perniciosa has a broad host range and infects a variety of meristematic tissues in cacao plants, whereas M. roreri infects only pods of Theobroma and Herrania genera. Comparative pathogenomics of these fungi is essential to understand Moniliophthora infection strategies, therefore the detection and in silico functional characterization of effector candidates are important steps to gain insight on their pathogenicity. Results: Candidate secreted effector proteins repertoire were predicted using the genomes of five representative isolates of M. perniciosa subpopulations (three from cacao and two from solanaceous hosts), and one representative isolate of M. roreri from Peru. Many putative effectors candidates were identified in M. perniciosa: 157 and 134 in cacao isolates from Bahia, Brazil; 109 in cacao isolate from Ecuador, 92 and 80 in wild solanaceous isolates from Minas Gerais (Lobeira) and Bahia (Caiçara), Brazil; respectively. Moniliophthora roreri showed the highest number of effector candidates, a total of 243. A set of eight core effectors were shared among all Moniliophthora isolates, while others were shared either between the wild solanaceous isolates or among cacao isolates. Mostly, candidate effectors of M. perniciosa were shared among the isolates, whereas in M. roreri nearly 50% were exclusive to the specie. In addition, a large number of cell wall-degrading enzymes characteristic of hemibiotrophic fungi were found. From these, we highlighted the proteins involved in cell wall modification, an enzymatic arsenal that allows the plant pathogens to inhabit environments with oxidative stress, which promotes degradation of plant compounds and facilitates infection. Conclusions: The present work reports six genomes and provides a database of the putative effectorome of Moniliophthora, a first step towards the understanding of the functional basis of fungal pathogenicity

Aspectos Nutricionais Associados a Patogênese das Doenças Inflamatórias Intestinais: uma Revisão Sistemática / Nutritional Feature Associated with the Pathogenesis of Inflammatory Bowel Diseases: A Systematic Review

Objective: To evaluate the scientific evidence about the fecal inflammatory biomarkers used in medical practice for the evaluation of disease activity and diagnosis of inflammatory bowel disease.Data source: Were evaluated articles of BVS databases, Scielo, Google Scholar, PubMed and Science Direct. The descriptors used in this review were "inflammatory bowel disease" AND (“diet” OR “nutrition”). They considered manuscripts published between 2014 and December 2019, available in full and published in English.Data synthesis: Initially identified 676 articles. The first selection, based on the analysis of the titles and abstracts of the 676 selected articles, resulted in 90 articles and after the complete reading of the manuscripts, 24 studies were considered eligible for analysis. No study has been conducted in Brazil.Conclusions: The studies analyzed in this systematic review increase that qualitative or quantitative changes in certain food groups in the composition of diets make the patient susceptible to IBD or increase the chances of acute crises

Características morfofisiológicas da soja em Latossolo Amarelo submetida a diferentes fontes de fertilizantes fosfatados no cerrado piauiense

As fontes de fertilizantes fosfatados apresentam diferenças no produto das reações químicas entre o fertilizante e o solo, sendo influenciadas pelas características químicas e texturais do solo. Nesse sentido, objetivou-se com este estudo avaliar características morfofisiológicas da cultura da soja sob diferentes fontes de fósforo no sudoeste piauiense. O delineamento experimental foi em blocos casualizados, sendo que os tratamentos constaram de quatro fontes de fósforo (o superfosfato simples (SSP), o superfosfato triplo (SPT), fosfato natural reativo (FNR) e o fosfato natural reativo + enxofre (FNR+S)), mais uma testemunha com calcário Cincal, com quatro repetições. O experimento foi implantado no ano agrícola 2012/13 e as avaliações foram realizadas durante as safras 2013/14 e 2014/15. Foram avaliadas variáveis do estádio fenológico de florescimento pleno e de produção da soja. As características morfofisiológicas da cultura da soja foram influenciadas pelas fontes de fósforo, conforme constatado no estande de plantas, índice de área foliar, radiação fotossintética ativa e eficiência da radiação fotossintética ativa, fitomassa seca, produtividade e no peso de mil grãos

Uma oficina de novidades : a implantação de núcleos urbanos na capitania de São Paulo, 1765-1775

Este trabalho apresenta parte dos resultados da tese de doutorado Método e Arte: criação urbana e organização territorial na capitania de São Paulo, 1765-1811, desenvolvida na Faculdade de Arquitetura e Urbanismo da Universidade de São Paulo, com apoio de bolsa da Fundação de Amparo à Pesquisa do Estado de São Paulo.Este artigo acompanha algumas dinâmicas de implantação de núcleos urbanos na capitania de São Paulo durante a administração do governador e capitão-general Morgado de Mateus (1765-1775). Destacam-se momentos significativos do processo de formação de paisagens urbanas, desde o recrutamento de povoadores e a busca de sítios até a definição dos traçados. A intenção é mostrar que a Coroa portuguesa foi tentando organizar determinados modos de conduzir a expansão urbana, ao passo que experiências e circunstâncias locais constantemente exigiram arranjos novos e específicos. A análise fundamenta-se numa seleção da documentação oficial já publicada e também em correspondência, em boa parte inédita, proveniente de agentes locais encarregados de tarefas ligadas ao povoamento. Procura-se tratar da política urbanizadora daquele período como um processo desenvolvido num contexto de conflitos mais do que como produto de um projeto pré-delineado por autoridades metropolitanas ou alheio a realidades do lugar. ______________________________________________________________________________________ ABSTRACTThis article investigates some of the dynamics associated with the establishment of urban nuclei in the captaincy of São Paulo during the administration of the Morgado de Mateus, governor and captain-general of the captaincy from 1765 to 1775. Several significant aspects about the formation process of urban landscapes stand out, from the recruitment of settlers and the search for suitable sites to the definition of urban layouts. The intention of this study is to show that the Portuguese crown made efforts to organize certain processes for conducting urban expansion, whilst local experience and circumstances continually demanded new and specific arrangements. The analysis is based on a selection of previously-published official documents, as well as mostly unpublished correspondence from local agents in charge of settlement-related tasks. The urbanization policy of the period is dealt with as a process that was executed in the context of conflicts, rather than as the product of a project pre-planned by metropolitan authorities or detached from the realities of the place at that time

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

Assessing the impact of COVID-19 on liver cancer management (CERO-19)

Background & Aims: The coronavirus disease 2019 (COVID-19) pandemic has posed unprecedented challenges to healthcare systems and it may have heavily impacted patients with liver cancer (LC). Herein, we evaluated whether the schedule of LC screening or procedures has been interrupted or delayed because of the COVID-19 pandemic. Methods: An international survey evaluated the impact of the COVID-19 pandemic on clinical practice and clinical trials from March 2020 to June 2020, as the first phase of a multicentre, international, and observational project. The focus was on patients with hepatocellular carcinoma or intrahepatic cholangiocarcinoma, cared for around the world during the first COVID-19 pandemic wave. Results: Ninety-one centres expressed interest to participate and 76 were included in the analysis, from Europe, South America, North America, Asia, and Africa (73.7%,17.1%, 5.3%, 2.6%, and 1.3% per continent, respectively). Eighty-seven percent of the centres modified their clinical practice: 40.8% the diagnostic procedures, 80.9% the screening programme, 50% cancelled curative and/or palliative treatments for LC, and 41.7% modified the liver transplantation programme. Forty-five out of 69 (65.2%) centres in which clinical trials were running modified their treatments in that setting, but 58.1% were able to recruit new patients. The phone call service was modified in 51.4% of centres which had this service before the COVID-19 pandemic (n = 19/37). Conclusions: The first wave of the COVID-19 pandemic had a tremendous impact on the routine care of patients with liver cancer. Modifications in screening, diagnostic, and treatment algorithms may have significantly impaired the outcome of patients. Ongoing data collection and future analyses will report the benefits and disadvantages of the strategies implemented, aiding future decision-making. Lay summary: The coronavirus disease 2019 (COVID-19) pandemic has posed unprecedented challenges to healthcare systems globally. Herein, we assessed the impact of the first wave pandemic on patients with liver cancer and found that routine care for these patients has been majorly disrupted, which could have a significant impact on outcomes. (C) 2021 The Authors. Published by Elsevier B.V. on behalf of European Association for the Study of the Liver (EASL)