bluuebunny/crossref_metadata_2025 huggingface dataset:
From the Frontlines: A Qualitative Study of Staff Experiences With Clinical Event Debriefing
Authors: Galligan Meghan M. , Haggerty Mary , Wolfe Heather A. , Debrocco Dawn , Kellom Katherine , Garcia Stephanie M. , Neergaard Rebecca , Akpek Eda , Barg Frances K. , Friedlaender Eron
Published: November 2021

OBJECTIVES

Clinical event debriefing (CED) can improve patient care and outcomes, but little is known about CED across inpatient settings, and participant experiences have not been well described. In this qualitative study, we sought to characterize and compare staff experiences with CED in 2 hospital units, with a goal of generating recommendations for a hospital-wide debriefing program.

METHODS

We conducted 32 semistructured interviews with clinical staff who attended a CED in the previous week. We explored experiences with CED, with a focus on barriers and facilitators. We used content analysis with constant comparative coding to understand priorities identified by participants. We used inductive reasoning to develop a set of CED practice recommendations to match participant priorities.

RESULTS

Three primary themes emerged related to CED barriers and facilitators. (1) Factors affecting attendance: most respondents voiced a need for frontline staff inclusion in CED, but they also cited competing clinical duties and scheduling conflicts as barriers. (2) Factors affecting participant engagement: respondents described factors that influence participant engagement in reflective discussion. They described that the CED leader must cultivate a psychologically safe environment in which participants feel empowered to speak up, free from judgment. (3) Factors affecting learning and systems improvement: respondents emphasized that the CED group should generate a plan for improvement with accountable stakeholders. Collectively, these priorities propose several recommendations for CED practice, including frontline staff inclusion.

CONCLUSIONS

In this study, we propose recommendations for CED that are derived from first-hand participant experiences. Future study will explore implementation of CED practice recommendations.
Left Ventricular Systolic Dysfunction Due to Atrial Fibrillation: Clinical and Echocardiographic Predictors
Authors: Marcusohn Erez , Kobo Ofer , Postnikov Maria , Epstein Danny , Agmon Yoram , Gepstein Lior , Hellman Yaron , Zukermann Robert
Published: November 2021

Background: Diagnosis of AF-induced cardiomyopathy can be challenging and relies on ruling out other causes of cardiomyopathy and, after restoration of sinus rhythm, recovery of left ventricular (LV) function. The aim of this study was to identify clinical and echocardiographic predictors for developing cardiomyopathy with systolic dysfunction in patients with atrial tachyarrhythmia. Methods: This retrospective study was conducted in a large tertiary care centre and compared patients who experienced deterioration of LV ejection fraction (EF) during paroxysmal AF, demonstrated by precardioversion transoesophageal echocardiography with patients with preserved LV function during AF. All patients had documented preserved LVEF at baseline (EF >50%) while in sinus rhythm. Results: Of 482 patients included in the final analysis, 80 (17%) had reduced and 402 (83%) had preserved LV function during the precardioversion transoesophageal echocardiography. Patients with reduced LVEF were more likely to be men and to have a more rapid ventricular response during AF or atrial flutter (AFL). A history of prosthetic valves was also identified as a risk factor for reduced LVEF. Patients with reduced LVEF also had higher incidence of tricuspid regurgitation and right ventricular dysfunction. Conclusion: In ‘real-world’ experience, male patients with rapid ventricular response during paroxysmal AF or AFL are more prone to LVEF reduction. Patients with prosthetic valves are also at risk for LVEF reduction during AF/AFL. Finally, tricuspid regurgitation and right ventricular dysfunction may indicate relatively long-standing AF with an associated reduction in LVEF.
REGIONAL CONVERGENCE THEORIES – CONFORMITY WITH THE EU DEVELOPMENT
Authors: Totev S.
Published: November 2021

A critical review of neoclassical and new economic theories on their correspondence to empirical results for economic development has been made. In the light of these theories, three leading hypotheses for convergence have been considered -- "unconditional β-convergence", "conditional β-convergence" and "club convergence". An assessment was made, for the existence of economic convergence in the EU countries at different levels EU-28, EU-15 and the new member states of Central and Eastern Europe, for the period 2007 - 2017 Based on the obtained results, some summaries and conclusions are made.
REPUBLIC OF BULGARIA – TRANSIT COUNTRY FOR REFUGEES
Authors: Panayotova S. , Petrova D.
Published: November 2021

The paper covers an important issue in national and international aspect: the migration processes and the legislation in Bulgaria. About 60,000 to 70,000 immigrants have been registered in the country but according to the National Statistical Institute (NSI) the number of immigrants residing in Bulgaria is between 300 and 350 thousand coming from more than 11 countries. The purpose of this study is to present an up-to-date picture of migration, in particular immigrants in Bulgaria, and their limited access to the labor market, health care, education, and social assistance. The authors use the methods of comparison, analysis, and data pooling. Secondary information from the authors' participation in the seminar Waves of Integration (TSUNAMI) in Caciulata, Romania, 2019 was also analyzed. The results of the survey show that the majority of the Bulgarian population perceives immigrants as a threat due to difficulties in their integration and in relation to the worse economic situation of the country compared to other European countries. In conclusion, migration in the country between 2017 and 2019, including illegal, is relatively low. The refugee crisis affects the Bulgarian population mainly politically and psychologically, and for asylum seekers Bulgaria is not a final destination but a transit territory.
MODELS FOR BALANCED DEVELOPMENT OF BULGARIAN RURAL REGIONS IN THE CONTEXT OF CAP POST-2020
Authors: Beluhova-Uzunova R. , Hristov K.
Published: November 2021

The development of rural regions and rural disparities are the main issues in the European Union regional policy. The topic continues to be an object of serious discussion among policymakers and scientist. Agriculture plays an important role in rural areas and contributes to generating employment and income. In the past decades, the CAP is reforming and changing to address the challenges in the EU rural regions. The aim of the study is based on the socio-economic analysis of the rural regions in Bulgaria to formulate opportunities for more balanced and sustainable development. The paper observes possibilities and prospects for the rural areas in Bulgaria in the context of the CAP post-2020. The study reveals that depopulation and marginalization of rural regions remain major issues in Bulgaria. Therefore, the implementation of the territorial and local model should dominate in Pillar II for the 2014-2020 programming period. These approaches could stimulate transformations and transition to sustainable regional development. In order to maximize the potential of the Pillar II funding, the national regional policy also should be reviewed.
Features of the course of hemorrhagic fever with renal syndrome in HIV-infected patients
Authors: Manakhov K. M. , Povysheva E. V. , Gilyazova A. R. , Sarksyan D. S.
Published: November 2021

Human immunodeficiency virus (HIV) is a significant medical and social problem for many developed countries. HIV infection is featured with developing chronic kidney pathology as well as acute renal damage. In some regions, hemorrhagic fever with renal syndrome (HFRS) can contribute somehow to developing renal pathology in HIVinfected subjects. The aim of the study was to identify clinical and laboratory features of HFRS course during HIV infection. A retrospective study was conducted by forming two groups: group 1 consisted of 9 patients suffered from HFRS together with verified HIV infection, group 2 — 53 patients with HFRS but lacking any clinical and epidemiological indications supporting HIV infection. Subjects in both groups were age- and sex-matched. The average age of the patients in group 1 and group 2 was 34 and 31 years, respectively. For statistical analysis, the licensed SPSS 22.0 software was used. A significance level p for statistical criteria was set equal to 0.05. In general, HFRS course in all patients was accompanied by characteristic signs: intoxication syndrome, impaired vision, hemorrhagic rash, pain in the lumbar region, decreased diuresis, thrombocytopenia, proteinuria, polymorphic urinary syndrome and azotemia. HFRS patients with concomitant HIV infection often complain of dry mouth, bloating, visible shortness of breath. Laboratory changes describe more severe kidney damage. A direct strong correlation was shown between leukocyte count and level of blood urea in patients with concomitant HIV infection (r = 0.798; p = 0.01). The combination of HFRS and HIV was accompanied by a milder HFRS course — rate of mild disease was almost 6-fold higher among patients of this group. In this case, no cases of severe hemorrhagic fever with renal syndrome combined with HIV were noted. Our study allowed to obtain unambiguous data. Predisposition of HIV-infected patients to renal pathology may be a determining factor in kidney damage upon emerging HFRS: more prominent rise in creatinine and urea level. Moreover, according to rating scale for assessing HFRS severity, it formally turned out that during concomitant HIV infection patients more often fit to a mild disease severity, even in the presence of more pronounced renal manifestations. The occurrence of acute renal pathology in HIV-infected patients is a life-threatening condition, a factor of deterioration of chronic renal pathology and a predictor of death. Consequently, this patient population requires thorough monitoring both at inpatient and outpatient stages.
Multi-drug resistance and biofilm production among diarrheagenic Escherichia coli pathotypes isolated from stools of children with acute diarrheal disease
Authors: David E. E. , Yameen M. A. , Igwenyi I. , Okafor A. C. , Obeten U. N. , Obasi D. O. , Ezeilo U. R. , Emeribole M. N. , David C. N.
Published: November 2021

Background. Diarrheagenic E. coli (DEC) is an etiological agent of childhood diarrhea. Resistance against commonly used drugs in the empirical treatment of enteric infections has increased among DEC. Relationship between antibiotic resistance and biofilm formation in microorganisms have been widely reported. This study was aimed to determine the antibiotic resistance and biofilm production pattern among DEC pathotypes isolated from stools of children aged 0–5 years with acute diarrheal disease in Abakaliki, Nigeria. Materials and methods. Diarrheal stool samples were obtained from 60 children and E. coli were isolated and identified using standard guidelines provided for laboratory diagnosis of enteric pathogens. Molecular identification was done by amplification of E. coli universal stress protein A (uspA) using polymerase chain reaction (PCR) method. Detection of virulent genes of DEC pathotypes was performed in a group of multiplex PCR using their specific primers. Kirby–Bauer disk diffusion method was used to determine the antibiotic susceptibility patterns of the isolates while biofilms production was detected by thiazolyl blue tetrazolium bromide dye in a 96-well plate. Results. DEC was isolated in 40 stools among which EIEC [40% (n = 16)] was commonly detected followed by ETEC [30% (n = 12)], EAEC [20% (n = 8)] and typical EPEC [10% (n = 4)]. Half of EAEC showed the highest multidrug resistance against ampicillin, cefoxitin, ciprofloxacin, levofloxacin, and tetracycline with the strongest biofilm production followed by all the EPEC which were resistant to ampicillin, ciprofloxacin, levofloxacin, and tetracycline with moderate biofilm production. All the LT-ETEC exhibited the least resistance to ampicillin and tetracycline with the weakest biofilm production. Conclusion. High frequency of the EIEC pathotype suggests its role as the primary etiological agent of diarrhea in children. Correlation between high drug resistance and biofilm production among the pathotype may indicate that biofilms may provide compatible uptake of resistance genes.
Parameters of blood short-chain peptides and digestive hydrolases in patients with chronic hepatitis B virus infection
Authors: Zhuraeva M. A. , Aleinik V. A. , Ashuralieva N. D. , Halikova D. S. , Ravzatov J. B. , Abdulazizhozhyv B. K.
Published: November 2021

The aim of the study was to examine specifics of changes in the level of stomach- and pancreas-released blood hydrolases in chronic viral hepatitis B and analyze the mechanisms underlying such changes. We assessed serum markers of HBV infection, liver enzymes tests as well as gastric and pancreatic hydrolase level. The patients examined were divided into three groups: control (healthy) and two study groups — HBV post-infection and chronic HBV infection. Patients with HBV post-infection had no significant deviations from normal range for blood level of gastric and pancreatic hydrolases. Patients with chronic HBV infection were found to contain increased blood level of amylase and lipase, which may evidence about increasing pancreatic functional activity and development of covert pancreatitis. At the same time, decline in the concentration of serum pepsinogen-1 below 40 μg/l could indicate about prominently decreased secretion of hydrochloric acid and development of atrophic gastritis, and it was found that the major factor contributing to development of such disorders was the short-chain peptide CCK-8, which utilization declines in patients with chronic HBV infection. CCK-8 can play a pivotal role in inhibiting stimulation of gastric acid secretion and controls gastric acid, plasma gastrin and somatostatin secretion. Cholecystokinin has been found to inhibit acid secretion by activating CCK type A receptors as well as via somatostatin-involving mechanism. The secretion of gastric somatostatin-14 increased by fivefold due to CCK-8 alone, but was blocked by the CCK-A receptor blocker loxiglumide. These data show that CCK-8 directly inhibits acid reactions by stimulating the release of gastric somatostatin indirectly through the CCK-A receptor. Thus, it can be assumed that normally CCK-8 is mainly utilized by the liver, which is altered during chronic hepatitis B resulting in elevated blood CCK-8 concentration. As a consequence, it enhances pancreatic secretion resulting in developing pancreatitis that is paralleled with inhibited gastric secretion and emerged atrophic gastritis.
Synthesis and analgesic activity evaluation of derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acid
Authors: Siutkina Alena I. , Makhmudov Ramiz R. , Shipilovskikh Daria A.
Published: November 2021

The synthesis of new derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acid is described. Starting 2-{[5-aryl-2-oxofuran-3(2H)-ylidene]amino}thiophene-3-carboxylic acids were obtained by intramolecular cyclisation of substituted 4-aryl-4-oxo-2-thienylaminobut-2-enoic acids in acetic anhydride. New derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acids were obtained via decyclization reaction of 2-{[5-aryl-2-oxofuran-3(2H)-ylidene]amino}thiophene-3-carboxylic acids. The structure of the compounds obtained was confirmed by the 1H and 13C NMR spectroscopy, IR spectrometry and elemental analysis methods. Analgesic activity of new compounds has been studied by the “hot plate” method on outbred white mice of both sexes with intraperitoneal injection. It was found that derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acid possess analgesic effect exceeding the effect of the comparison drug metamizole.
RBM20 gene variants associated with left atrial dilatation in patients with old myocardial infarction and heart failure with reduced ejection fraction
Authors: Vakhrushev Yu. A. , Kuular A. A. , Lebedeva V. K. , Kozyreva A. A. , Kostareva A. A. , Sitnikova M. Yu. , Lyasnikova E. A.
Published: November 2021

Aim. To study the prevalence of RBM20 gene polymorphisms and their relationship with the structural and functional left atrial (LA) characteristics in patients with coronary artery disease and heart failure with reduced ejection fraction (HFrEF).

Material and methods. The study included 138 men aged 55,8±6,6 years with prior myocardial infarction ³12 months ago and HFrEF (class II-IV heart failure, left ventricular ejection fraction (Simpson’s methods), 25,1±7,2%). The control group consisted of 384 healthy donors. Genotyping of two RBM20 polymorphic variants (rs942077 and rs35141404) was performed by real-time polymerase chain reaction.

Results. The prevalence of RBM20 polymorphisms did not differ in the HFrEF cohort and the control group. The GA rs35141404 genotype was more common among patients with a less pronounced increase in LA volume index (LAVI) (p=0,034). The minor A allele rs35141404 was associated with a protective effect on severe LA remodeling. However, this association did not reach the level of significance.

Conclusion. For the rs942077 and rs35141404 polymorphic variants of the RBM20 gene, no significant associations were found with the LA size and atrial fibrillation presence in patients with HFrEF and old myocardial infarction. There was a tendency towards the association of the A allele and the GA rs35141404 genotype with a protective effect on LA remodeling. The data obtained confirm the need for further search for genotype-phenotype relationships of a wider population of patients with heart failure and coronary artery disease.
Desigualdades de gênero por área de conhecimento na ciência brasileira: panorama das bolsistas PQ/CNPq
Authors: Cunha Rocelly , Dimenstein Magda , Dantas Candida
Published: November 2021

RESUMO O número de mulheres pesquisadoras tem crescido mundialmente. No entanto, as desigualdades de gênero persistem em quatro aspectos: as mulheres ainda representam parcela minoritária na ciência mundial; concentram-se em determinadas áreas de conhecimento; predominam nos níveis iniciais da carreira e são sub-representadas em posições deliberativas da política científica e tecnológica. No Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), apesar do aumento de mulheres bolsistas de Produtividade em Pesquisa (PQ) nas últimas décadas, as assimetrias permanecem. Este estudo visou discutir as assimetrias de gênero e raça nas diferentes áreas do conhecimento, em particular na psicologia, tomando como analisador a distribuição de bolsas (PQ) do CNPq. Utilizaram-se dados disponibilizados pelo CNPq e coletados por meio de SurveyMonkey. As desigualdades de gênero na ciência persistem no sistema científico brasileiro: as mulheres são minoria entre os bolsistas PQ/CNPq, concentram-se em guetos disciplinares e enfrentam dificuldades tanto para acessar o sistema PQ quanto para alcançar as modalidades de bolsa de maior prestígio científico. Na psicologia, apesar da presença em todas as modalidades de bolsa, ocupam proporcionalmente menos posições no topo da carreira. Ademais, há invisibilidade de mulheres negras e indígenas, a qual tem suas raízes no projeto moderno colonial.
Relações sociais de sexo/gênero, trabalho e saúde: contribuições de Helena Hirata
Authors: Oliveira Simone Santos , Neves Mary Yale , Brito Jussara , Rotenberg Lúcia
Published: November 2021

RESUMO O artigo visou refletir acerca da produção intelectual da pesquisadora Helena Hirata como importante referência para o campo da saúde coletiva, em especial para a compreensão das relações entre o trabalhar e as dinâmicas que envolvem a saúde. Recorreram-se às suas publicações teórico-acadêmicas e entrevistas concedidas a revistas especializadas, cuja análise foi aprofundada por meio de uma conversa virtual com a pesquisadora. Com suas pesquisas comparativas no Brasil, na França e no Japão, Hirata apresenta as diversidades e semelhanças dos mundos do trabalho, dos processos de globalização e seus efeitos, fortalecendo a discussão sobre a ampliação do conceito de trabalho - para além do trabalho assalariado - e sua centralidade. Seus estudos enriquecem o debate sobre a indissociabilidade entre as relações sociais de sexo/gênero e a divisão sexual do trabalho. A imbricação e a interdependência do conjunto das relações sociais figurarão de forma exemplar em suas análises acerca do trabalho de cuidado, possibilitando a condensação de ideias e conceitos. Dessa forma, a produção intelectual de Hirata, ao afirmar a transversalidade das relações sociais de sexo/gênero, subsidia reflexões sobre a determinação do processo saúde-doença, contribuindo decisivamente para os estudos da relação saúde e trabalho.
Itinerários terapêuticos da população trans em um município do nordeste brasileiro
Authors: Silva Rodrigo Aragão da , Tajra Fábio Solon , Luz Paulo Cesar de Moura , Sales Jaqueline Carvalho e Silva
Published: November 2021

Resumo O artigo apresenta resultados de pesquisa qualitativa sobre os itinerários terapêuticos da população trans no município de Timon - Maranhão a partir da realização de entrevistas individuais e semiestruturadas com oito pessoas trans (dois homens e seis mulheres). A análise dos dados foi realizada com base no referencial teórico da hermenêutica de Paul Ricoeur. A partir das narrativas dos participantes da pesquisa, foram reconhecidas três unidades de significado: “a construção do ser-trans”, “o acesso à saúde da população trans” e, também, “itinerários terapêuticos (trans)formados”. Os itinerários mencionados não apresentaram vínculos formais entre os serviços, nem tampouco garantia de acesso e continuidade do cuidado.
A história de Joana, ou da (in)explicável invisibilidade do L do LGBTQIA+: refletindo a partir de Catolé do Rocha/PB
Authors: Tota Martinho
Published: November 2021

Resumo Este artigo foi elaborado a partir da história de vida e da narrativa de Joana, uma jovem mulher lésbica, natural de Catolé do Rocha (Sertão da Paraíba), ativista pelos direitos da população LGBTQIA+. Para além deste eixo temático - por meio do qual foi possível apreender aspectos importantes não apenas da vida de Joana no que diz respeito a sexualidade e gênero, mas também de outros sujeitos “dissidentes” no interior da região Nordeste do Brasil -, o presente texto apresenta como pano de fundo ou problemática associada a questão da invisibilidade lésbica nos trabalhos socioantropológicos, nos movimentos sociais e no espaço público. Onde estão as pessoas que representam (e/ou são representadas pelo) o L do LGBTQIA+? Eis a pergunta que perpassa este trabalho.
Agnes e Garfinkel: pensando gênero através de um clássico da sociologia
Authors: Vasconcellos Débora Araújo de , Santos Gustavo Gomes da Costa
Published: November 2021

Resumo Neste artigo buscamos apontar como a relação entre Agnes e o sociólogo estadunidense Harold Garfinkel produziu uma análise de gênero que se diferenciava das teorias biologizantes do seu tempo. Através do conceito de passing e da noção de rotineirização da Etnometodologia, o autor antecipa, em certa medida, certos pressupostos que viriam a nortear a noção de gênero que se desenvolveria na década de 1990. Na primeira parte do texto, o nosso enfoque será nos impactos da experiência de Agnes para a etnometodologia; em um segundo momento, provocaremos um diálogo entre Garfinkel e a teoria da performatividade de Judith Butler.
O tempo do luto materno pelo filho que morreu na infância
Authors: Bezerra Maria Augusta Rocha , Rocha Ruth Cardoso , Carneiro Cristianne Teixeira , Rocha Karla Nayalle de Souza , Moura Diogo Filipe Santos , Rocha Silvana Santiago da
Published: November 2021

Resumo Objetivo desvelar o movimento existencial da mãe após a morte do filho por acidente doméstico na infância. Método pesquisa embasada no referencial teórico-filosófico-metodológico da fenomenologia de Martin Heidegger, com dados coletados entre maio e junho de 2017, mediante entrevista fenomenológica com 10 mães cujos filhos morreram em decorrência de acidentes domésticos na infância. Resultados da compreensão dos relatos, emergiram três temáticas: Lembrando o sofrimento profundo diante da morte do filho e os primeiros dias/meses sem ele; Revivendo a dor no presente, por meio da falta diária e das datas importantes e objetos/símbolos da criança; e Antecipando que a dor e a falta que sentem dos filhos nunca irão passar. Conclusão e implicações para a prática o tempo não é preditor da elaboração do luto materno. Neste contexto, o vivido da mãe é composto por um conjunto de significados, que envolvem multiplicidade de fatores e geram importantes repercussões ao longo da vida. Na perspectiva para promoção do cuidado, emergem, assim, a necessidade de ampliar a compreensão e as ações de acolhimento à mãe enlutada, refletindo sobre a temporalidade como constituinte do enlutamento materno.
Financeirização do imobiliário no Brasil: uma análise dos Certificados de Recebíveis Imobiliários (2005-2020)
Authors: Torres Ramon da Silva , Tonucci Filho João Bosco Moura , Almeida Renan Pereira
Published: November 2021

Resumo Este artigo busca compreender os contornos do processo de financeirização do imobiliário no Brasil sob a centralidade das operações de securitização, criadas no sentido de conectar o mercado imobiliário ao mercado de capitais. A análise fundamenta-se em uma amostra de dados sobre os Certificados de Recebíveis Imobiliários (CRI) emitidos entre 2005-2020, priorizando o mapeamento dos interesses e das interações entre os agentes envolvidos na cessão de créditos imobiliários. Constatou-se a baixa capacidade dos CRIs (e outros instrumentos) de financiar a habitação. Contudo, eles têm cumprido um papel fundamental para o setor financeiro: a aceleração do ciclo de reprodução do capital no setor imobiliário e a absorção crescente da riqueza imobiliária sob gestão dos fundos de investimento.
Capital incorporador e ciclos imobiliários em Belém
Authors: Ventura Neto Raul da Silva
Published: November 2021

Resumo Este artigo analisa a produção imobiliária realizada pelo capital incorporador em Belém, identificando as diferentes formas de organização das incorporadoras e construtoras durante o que identificamos como ciclos imobiliários. A metodologia conta com dados primários sobre a produção por incorporação em Belém, a forma de inserção de incorporadoras nacionais no circuito imobiliário local, com dados oficiais sobre o mercado de trabalho na construção civil, com base em informações da Rais, além de uma série de preços do metro quadrado dos imóveis nas últimas duas décadas, com base na pesquisa em classificados. Os resultados avançam na leitura histórico-estrutural sobre a formação e transformação dos circuitos imobiliários periféricos, visando desnudar como elites locais vêm direcionando a ação do incorporador no espaço intraurbano.
O galpão logístico e a financeirização urbana: da flexibilidade produtiva ao imobiliário
Authors: Yassu Alexandre Mitsuro da Silveira
Published: November 2021

Resumo Em meio às transformações na (re)produção da metrópole, em razão da reestruturação produtiva e imobiliária, o galpão logístico emerge como expressão de ambas, tanto é parte das alterações na organização da empresa capitalista como é um novo produto imobiliário alinhado à demanda de grandes varejistas e do comércio digital, envolvendo agentes financeiros e imobiliários em múltiplas escalas, do local ao global. Um fenômeno que invadiu a cidade de Cajamar e a transformou no principal polo logístico da RMSP. O nosso objetivo é, a partir do caso de Cajamar, explorar a gênese dessa nova mercadoria imobiliária, suas formas específicas de propriedade e de circulação, sua modelagem como produto e sua forma de inserção no espaço.
Produção imobiliária de habitação em Curitiba na década de 2010: algumas reflexões
Authors: Martins Fabiana Moro , Pereira Gislene de Fátima
Published: November 2021

Resumo A produção do espaço visando à reprodução do capital intensificou no Brasil na última década, mediante a financeirização do setor imobiliário e a execução do Programa Minha Casa Minha Vida, que fomentou a produção de habitação para o segmento econômico pelo mercado. Considerando esse cenário, este texto apresenta os resultados da pesquisa sobre a produção de habitação multifamiliar em Curitiba entre 2010 e 2018. O estudo identificou os agentes e as características dos empreendimentos e seus efeitos no espaço urbano. Confirmou-se a expansão, numérica e territorial, da produção imobiliária de habitação, com forte participação das empresas de capital aberto e com diferentes estratégias de atuação conforme a conjuntura econômica. Essa produção reforçou a segmentação e a fragmentação do espaço na cidade.
O instrumento da outorga onerosa em Fortaleza como estratégia de valorização imobiliária
Authors: Aldigueri Camila Rodrigues , Rosa Sara Vieira
Published: November 2021

Resumo O presente artigo tem como objetivo analisar a apropriação do instrumento de outorga onerosa como nova prática do mercado imobiliário na reprodução do capital no atual contexto brasileiro de crise econômica. Temos como pressuposto que a regulamentação da Outorga Onerosa de Alteração do Uso do Solo em Fortaleza está sendo instrumentalizada como uma prática associada ao segmento de alta e altíssima renda e a áreas extremamente valorizadas, para (re)estabelecer padrões de reestruturação produtiva e potencializar a acumulação de capital no atual cenário de crise. Verificamos que o instrumento tem sido utilizado como estratégia de diferenciação que possibilita alcançar elevados preços e lucros extraordinários. Essa estratégia é viabilizada pela flexibilização de diferentes índices urbanísticos, sem limites máximos, contrariando legislações superiores e ampliando desigualdades socioespaciais.
The uncertainties of synthetic unit hydrographs applied for basins with different runoff generation processes
Authors: Pedroso Andreia , Mannich Michael
Published: November 2021

ABSTRACT Synthetic unit hydrographs (SUH) are useful tools for the estimation of maximum flows in basins lacking historical records of measurements. However, these methods have many uncertainties and do not always produce results consistent with reality. This study comparatively analyzed the uncertainty of the application of the Snyder, SCS, and Clark HUS methods, widely used, in relation to the observed hydrographs, in the Pequeno River and the Espingarda River basins, located in the State of Paraná, considered small from the point of view of the drainage area. The simulation was performed using the HEC-HMS 4.2.1 software considering a combination of parameters that produced the higher and lower peak flow, respectively named as conservative and bold approaches. It was verified that the SUH methods, in general, overestimated the peak flows for both basins under study. In addition, the results obtained showed that SUH are fundamentally conservative models so that a bold approach in estimating the parameters input leads to results with smaller errors in simulated peak flows. Even running the SUH with the real excess rainfall as input there is an overestimation of the peak flow. SCS SUH produced the highest peak flows and consequently the largest errors while Snyder’s SUH produced the smallest errors. The magnitude of the overestimation of the peak flow for the Pequeno River was up to 60 folds. Its geology features suggest a Dunnian runoff generation process, which explains the larger errors.
Optimal architecture for artificial neural networks as pressure estimator
Authors: Souza Rui Gabriel Modesto de , Brentan Bruno Melo , Lima Gustavo Meirelles
Published: November 2021

ABSTRACT The knowledge of hydraulic parameters in water distribution networks can indicate problems in real time, such as pipe bursts, small leakages, increase in pipe roughness and illegal connections. However, an accurate indication relies on the quantity and quality of the data acquired, i.e., the number of sensors used to monitor the network and their location. It is not economic feasible have a great number of sensors, thus, the use of artificial intelligence, such as Artificial Neural Networks (ANNs) can reduce the lack of information necessary to identify problems, estimating hydraulic parameter through the few information collected. The reliability of ANNs depends on its architecture, so, in this paper, different conditions are tested for ANN training to identify which are the most relevant parameters to be adjusted when the ANN is used for pressure estimation.
Optimum design of a composite floor system considering environmental and economic impacts
Authors: Arpini Paulo Augusto T. , Loureiro Mayane C. , Breda Breno D. , Calenzani Adenílcia F. , Alves Élcio C.
Published: November 2021

Abstract The composite floor system, composed of steel deck and concrete slab, generates more efficient and economical structures. On the other hand, the design of this type of structure has a high complexity level due to the consideration of several variables. In this respect, the objective of this paper is to present the formulation of the optimization problem for a composite floor system (steel and concrete) considering such environmental as economic impacts. To formulate the optimization problem, the reduction of environmental impact was adopted as an objective function - assuming the CO2 emission and the finance cost as parameters. The restrictions were taken by the limiting states imposed in standard NBR 8800:2008. The computer program was developed via Matlab R2016a and the optimization process was carried out using the Genetic Algorithm toolbox existing in this platform. Two application examples of the formulation at hand are presented: the first from the literature and the second from an existing building - in both situations the influences of different concrete compressive characteristic strengths were analyzed. The results of the optimization problem show a reduction in geometry and, consequently, in its weight. The solution found by the program reduces by up to 17.70% of CO2 emissions and 17.47% of the finance cost. When was applying different concrete compressive strengths, the optimal solution for environmental impact did not get the lowest cost. In general, the steel deck formwork obtained the highest percentage of environmental impact, while the beams and girders, with the same shape configuration, had the highest finance cost. Therefore, it is shown that the optimal design solution to CO2 emissions is not always the better solution for the finance cost.
Reliability analysis of slender columns using the general method with linear creep theory
Authors: Ribeiro Kleyser , Loriggio Daniel Domingues , Real Mauro de Vasconcellos
Published: November 2021

Abstract To analyze the reliability of slender columns subjected to axial force and uniaxial bending moment, with a slenderness index between 100 and 140, 216 columns were modeled. The square cross-section was adopted, with three different configurations for longitudinal reinforcement. In the calculation, the general method with the linear creep theory was applied. Several factors were varied: slenderness index, reinforcement ratio, steel bars arrangement, compressive strength of concrete, and first-order relative eccentricity. For analysis purposes, the Monte Carlo method was adopted, followed by the First Order Reliability Method (FORM). Considering the results obtained, it was observed that the reliability index is usually higher for lower reinforcement ratios and varies according to the configuration of the cross-section.
Selected life history traits of Leptaxis simia (Gastropoda: Hygromiidae) established in the laboratory
Authors: Kuźnik-Kowalska Elżbieta , Cameron Robert A. D. , Proćków Małgorzata
Published: November 2021

Among ten adult specimens of the Madeiran endemic land snail Leptaxis simia kept in the laboratory, a single clutch of 110 eggs was reared, and the mortality, growth and reproductive capacity of hatchlings over a 1240- day period were monitored. Of 70 hatchlings, 34 survived to complete shell growth at around 640 days. Growth was rapid, and mortality high in the early stages; growth slowed and mortality was very low as full size was approached. Snails kept singly failed to lay any eggs. Among those with potential mates, only three clutches were produced, one of which yielded no hatchlings. Clutches were produced at least five months after shell growth was complete. Mortality increased sharply after the onset of sexual maturity, and the oldest snail survived for three and a half years. The apparently very strictly semelparous mode of reproduction, delayed sexual maturity and relatively long period of juvenile growth are discussed in relation to other species, and to the practical problems of rearing potentially endangered species in captivity.
Comparison of Ostracoda (Crustacea) species composition between lakes and streams at high elevations in Turkey
Authors: Yavuzatmaca Mehmet
Published: November 2021

Ostracods are one of the most suitable organisms because of their ecological and morphological preferences for habitat types to study the diversity between streams and lakes. Here, 24 streams and 16 lakes were sampled in 2019 to evaluate the species compositions between streams and lakes. Environmental heterogeneity in the sense of the physico-chemical variables was found among the habitats. 24 of the 29 species with 923 individuals were found in the lakes when 13 species with 898 individuals were found in the streams. Eight species were common in both habitat types. Species contributing about 70.81% to the significant differences in the species composition between the habitats showed cosmopolitan characteristics. Species variation among the replicates of lakes were higher than streams. Results indicated that the species composition was probably associated to dissolved oxygen in lakes, while electrical conductivity in streams. Relationship amid elevational range and ostracod species richness was negative in lakes when there was no clear relationship in the streams. Overall, results suggested that determination of influential regional factors in different aquatic bodies can provide important contributions to the estimation of which habitat types can be chosen by species, and the using of species as bioindicators.
Hüsün -Kubuh Tartışmaları Bağlamında Tanrı’nın Mutlak İyiliğinin Kötülüğün Ontolojik Mâhiyeti ile İlişkisi
Authors: Can Seyithan
Published: November 2021

Kötülük probleminde üzerinde durulan önemli argümanların başında mutlak iyi Tanrı tasavvurunun, kötülüğün varlığı ile bağdaşmayacağı hususudur. Bu çalışmada günümüzde hala etkinliğini ve güncelliğini koruyan kötülük probleminde ortaya konulan mutlak iyi Tanrı tasavvurunun, kötülüğün ontolojik mâhiyeti ile ilişkisi irdelenmektedir. Çalışmada kötülüğün ontolojik olarak mutlak iyi Tanrı kavramıyla uyuşmadığı ön kabulünden hareket edilmiştir. Her ne kadar kötülük problemine karşı üretilen cevaplar, genel olarak kötülüğün fiilen var olduğu gerçeği üzerinde kurgulansa da mutlak iyi olan Tanrı’nın kötülüğü de yarattığı ön kabulü, kötülüğün engellemesi gerektiği düşüncesinden daha öncelikli konumdadır. Bu bağlamda kötülüğün mutlak iyi bir Tanrı tarafından yaratılıp yaratılmadığı problemi kelâm ekollerinin hüsün- kubuh konusunda ortaya koydukları yaklaşımlar çerçevesinde ele alınmıştır. Kelâm ekollerinin görüşleri kapsamında değerlendirildiğinde ilk dönem Mu’tezile âlimleri ile Mâtürîdîler’in insan fiillerindeki kötülüğün ontolojik varlığını kabul eden anlayışlarının, mutlak iyi Tanrı tasavvuru ile bağdaşmayacağı kanaatine ulaşılmıştır. Son dönem Mu’tezile âlimlerinin vücûh nazariyesi ile Eş’arîler’in kötülüğün zâtî olarak varlığının olmadığına dair yaklaşımlarının, kötülük probleminde ele alınan mutlak iyi Tanrı tasavvuru açısından uygun cevaplar olarak kabul edilebileceği söylenebilir.
Competitive Adsorption of H2O and SO2 on Catalytic Platinum Surfaces: a Density Functional Theory Study
Authors: Ungerer Marietjie J. , Santos-Carballal David , van Sittert Cornelia G.C.E. , de Leeuw Nora H.
Published: November 2021

ABSTRACT Platinum has been widely used as the catalyst of choice for the production of hydrogen in the hybrid sulphur (HyS) cycle. In this cycle, water (H2O) and sulphur dioxide (SO2) react to form sulphuric acid and hydrogen. However, the surface reactivity of platinum towards H2O and SO2 is not yet fully understood, especially considering the competitive adsorption that may occur on the surface. In this study, we have carried out density functional theory calculations with long-range dispersion corrections [DFT-D3-(BJ)] to investigate the competitive effect of both H2O and SO2 on the Pt (001), (011) and (111) surfaces. Comparing the adsorption of a single H2O molecule on the various Pt surfaces, it was found that the lowest adsorption energy (Eads = -1.758 eV) was obtained for the dissociative adsorption of H2O on the (001) surface, followed by the molecular adsorption on the (011) surface (Eads = -0.699 eV) and (111) surface (Eads = -0.464 eV). For the molecular SO2 adsorption, the trend was similar, with the lowest adsorption energy (Eads = -2.471 eV) obtained on the (001) surface, followed by the (011) surface (Eads = -2.390 eV) and (111) surface (Eads = -1.852 eV). During competitive adsorption by H2O and SO2, the SO2 molecule will therefore preferentially adsorb onto the Pt surface. If the concentration of SO2 increases, self-reaction between two neighbouring SO2 molecules may occur, leading to the formation of sulphur monoxide (SO) and -trioxide (SO3) on the surface, which could lead to sulphur poisoning of the Pt catalytic surface. Keywords: Platinum, water, sulphur dioxide, hydrogen, adsorption, density functional theory.
DFT+U Study of the Electronic, Magnetic and Mechanical Properties of Co, CoO, and Co3O4
Authors: Cadi-Essadek Abdelaziz , Roldan Alberto , Santos-Carballal David , Ngoepe Phuti E. , Claeys Michael , de Leeuw Nora H.
Published: November 2021

ABSTRACT Cobalt nanoparticles play an important role as a catalyst in the Fischer-Tropsch synthesis. During the reaction process, cobalt nanoparticles can become oxidized leading to the formation of two phases: CoO rock-salt and Co3O4 cubic spinel. Experimentally, it is possible to evaluate the phase change and follow the catalyst degradation by measuring the magnetic moment, as each material presents a different magnetic structure. It is therefore important to develop a fundamental description, at the atomic scale, of cobalt and its oxide phases which we have done here using density functional theory with the Dudarev approach to account for the on-site Coulomb interactions (DFT+U). We have explored different Ueff values, ranging from 0 to 5 eV, and found that Ueff = 3.0 eV describes most appropriately the mechanical properties, as well as the electronic and magnetic structures of Co, CoO and Co3O4. We have considered a ferromagnetic ordering for the metallic phase and the antiferromagnetic structure for the oxide phases. Our results support the interpretation of the catalytic performance of metallic cobalt as it transforms into its oxidized phases under experimental conditions. Keywords: Materials chemistry, cobalt oxides, cobalt metal, spinel, density functional theory, on-site Coulomb correction.
The Carbonate-catalyzed Transesterification of Sunflower Oil for Biodiesel Production: in situ Monitoring and Density Functional Theory Calculations
Authors: Nyepetsi M. , Mbaiwa F. , Oyetunji O.A. , Dzade N.Y. , de Leeuw N.H.
Published: November 2021

ABSTRACT Biodiesel has emerged as a promising alternative fuel to replace dwindling fossil-based resources, particularly in view of its added environmental merit of reducing additional air pollution. Its specific attraction stems from the similarity of its physical properties to fossil fuel-derived diesel. Although the production of biodiesel is a relatively straightforward process, reaction progress monitoring and product analysis require costly specialist equipment, such as gas chromatography and mass spectrome-try. In this study, we investigate the use of pH in monitoring the progress of carbonate-catalyzed transesterification reactions. Specifically, we focus on potassium and sodium carbonates and sunflower oil. Our results are consistent with the results obtained by other studies using different methods of monitoring. To test the generality of the method, pH measurements were also used to monitor the progress of the potassium carbonate transesterification reaction in the presence of added water, glycerol and gamma-valerolactone (GVL). The obtained results are as expected, with a limited amount of water increasing the trans-esterification rate; glycerol slowing the reaction slightly in accord with Le Chatellier's principles; and GVL increasing the rate due to co-solvent effects. Atomic-level insights into the adsorption mechanism of methanol and water on the (001) surfaces of Na2CO3 and K2CO3 catalysts are provided by first-principles DFT calculations, which explain the increase in transesterification reaction rate upon the addition of water. Keywords: Transesterification, pH monitoring, biodiesel , Density Functional Theory ( DFT), co-solvent.
The role of technological pedagogical content knowledge and social cognitive variables in teachers’ technology integration behaviors
Authors: DİKMEN Cemal Hakan , DEMİRER Veysel
Published: November 2021

The Technological Pedagogical Content Knowledge (TPACK) framework provides a theoretical perspective of showing whether a teacher can effectively design and conduct technology-enhanced instruction. In addition, social cognitive variables like self-efficacy, outcome expectations, interest and intentions play a vital role in whether teachers choose to integrate technology into their instructional practices. Therefore, this study aimed to investigate the relationships between TPACK dimensions and these social cognitive variables to understand teachers’ behaviors in technology integration. For this purpose, a hypothetical model was designed and tested through structural equation modeling to investigate the relationships among these variables. The research sample consisted of 850 teachers from Turkey. The study findings demonstrate that especially teachers' technological knowledge (TK), technological content knowledge (TCK), technological pedagogical knowledge (TPK), and TPACK-core (different interactions of CK and PK with TK) together with their self-efficacy, outcome expectations, and interest have impacts on their intentions to use educational technologies. In this context, teachers with a high level of technological pedagogical content knowledge are more interested in educational technologies, their expectations regarding the outcomes of using instructional technologies increase and they develop behavioral intentions of using educational technologies; as a result, they see/evaluate themselves as more qualified in technology integration. Consequently, the study results are expected to contribute to a better understanding of teachers' behaviors and beliefs toward technology integration in education.