bluuebunny/crossref_metadata_2025_split huggingface dataset:
Measurement of the $${}^{212}{\mathrm{Po}}$$, $$^{214}\hbox {{Po}}$$ and $$^{212}\hbox {{Pb}}$$ half-life time with Timepix3
Authors: Bergmann Benedikt , Jelínek Jindřich 
Published: June 2022

AbstractThe half-life times of the relatively short-lived $$\alpha $$
α
-decaying isotopes $$^{212}\hbox {{Po}}$$

212

Po

and $$^{214}\hbox {{Po}}$$

214

Po

were measured with a hybrid pixel detector of Timepix3 technology. Radon daughter products were collected at the backside of a 1 mm thick silicon sensor so that subsequent decays inject the polonium isotopes of interest shallowly into the backside of the sensor. The detector’s high spatial and time resolution allow for particle identification and application of the delayed coincidence technique with low systematic uncertainty even at high rates. We find $$t_{1/2}^{^{212}{\hbox {Po}}} = ( 295.02 \pm 0.18{_{\mathrm{stat.}}} \pm 0.17_{\mathrm{syst.}} )\,\hbox {ns}$$

t

1
/
2

212

Po

=

(
295.02
±
0.18

stat
.

±
0
.

17

syst
.

)

ns

and $$t_{1/2}^{{}^{214}\mathrm{Po}} = ( 163.64 \pm 0.038{_{\mathrm{stat.}}} \pm 0.093_{\mathrm{syst.}} )\,\upmu \hbox {s}$$

t

1
/
2

214

Po

=

(
163.64
±
0.038

stat
.

±
0
.

093

syst
.

)

μ
s

. Studying the decay of the accumulated radon daughter products after removing the detector from the $$^{220}\hbox {{Rn}}$$

220

Rn

field, the half-life time of the $$\beta $$
β
-decay of $$^{212}\hbox {{Pb}}$$

212

Pb

was measured to be $$t_{1/2}^{^{212}{\mathrm{Pb}}} = ( 10.620 \pm 0.011_{\mathrm{stat.}} \pm 0.014_{\mathrm{syst.}} )\,\hbox {h}$$

t

1
/
2

212

Pb

=

(
10.620
±
0
.

011

stat
.

±
0
.

014

syst
.

)

h

. The results are discussed in the context of previous works.
A lower limit for Newtonian-noise models of the Einstein Telescope
Authors: Harms Jan , Naticchioni Luca , Calloni Enrico , De Rosa Rosario , Ricci Fulvio , D’Urso Domenico 
Published: June 2022

AbstractThe Einstein Telescope (ET) is a proposed third-generation gravitational-wave (GW) underground observatory. It will have greatly increased sensitivity compared to current GW detectors, and it is designed to extend the observation band down to a few Hz. At these frequencies, a major limitation of the ET sensitivity is predicted to be due to gravitational fluctuations produced by the environment, most importantly by the seismic field, which give rise to the so-called Newtonian noise (NN). Accurate models of ET NN are crucial to assess the compatibility of an ET candidate site with the ET sensitivity target also considering a possible reduction in NN by noise cancellation. With NN models becoming increasingly complex as they include details of geology and topography, it is crucial to have tools to make robust assessments of their accuracy. For this purpose, we derive a lower bound on seismic NN spectra, which is weakly dependent on geology and properties of the seismic field. As a first application, we use the lower limit to compare it with NN estimates recently calculated for the Sardinia and Euregio Meuse–Rhine (EMR) candidate sites. We find the utility of the method, which shows an inconsistency with the predictions for the EMR site, which indicates that ET NN models require further improvement.
As narrativas digitais dos movimentos negros femininos e étnicos raciais no combate a matriz colonial de poder
Authors: Félix Lúcia Maria de Souza , Amaral e Silva Fabiana Félix do 
Published: June 2022

A Matriz Colonial de Poder (MCP), foi uma das estratégias utilizadas para escravizar os africanos nas Américas. Por exemplo, no Brasil, que foram escravizados, onde efetivaram o racismo estrutural (Almeida, 2020). Por isso, a população negra brasileira, travou uma batalha permanente na sua trajetória de lutas e resistências, (Gomes, 2011) para conquistar a sua participação democrática no país, utilizando-se no início do século XXI, a educação popular, como uma das alternativas para denunciar nos territórios físicos das cidades, dos quatro domínios proposto por (Quijano, 1997), no entanto, com a pandemia no Brasil em (março/2019), as denúncias se ampliaram nas redes sociais. Este trabalho, partiu de um levantamento bibliográfico e da netnografia (Kozinets, 1996), onde mapeou as ações de educação popular no (facebook) dos movimentos sociais negros de São José dos Campos - SP, no período de 2019 a 2021, que combatem ao racismo estrutural praticado no país.
A “cultura do cancelamento”: contribuições de um olhar sociológico
Authors: Martins Tamires de Assis Lima , Cordeiro Ana Paula 
Published: June 2022

A vulgarização do termo “cancelamento”, sua utilização sem rigor algum para nomear situações distintas, sua apropriação como recurso para identificar qualquer tipo de crítica coletiva ao comportamento das celebridades nas redes sociais, fez com que alguns defendam a inexistência do “cancelamento” como fenômeno social sui generis, isto é, dotado de particularidades que o distinguem da mera crítica dirigida a outrem. Trata-se de um fenômeno contemporâneo, denominado de “linchamento virtual” por seus críticos, ou ativismo e radicalização da democracia por seus defensores, realizado por seus executores, aparentemente, com o intuito de problematizar condutas incompatíveis, na maioria dos casos, com os valores fundamentais da diversidade identitária, ou seja, expor, desconstruir e exigir que não sejam naturalizadas posturas racistas, machistas, homofóbicas, transfóbicas, dentre outras, que constituem preconceitos dominantes em uma sociedade desigual como a brasileira. Considerando ainda que, não se faz “cancelamento” de um sujeito sem que a execração pública seja difundida a todos os que quiserem saber a respeito dos fatos, uma vez que o objetivo do “cancelamento” é justamente reduzir ao mínimo o capital simbólico do sujeito “cancelado”, com consequências econômicas e profissionais, de modo que sirva de exemplo para dissuadir potenciais futuros infratores das normas éticas e morais dominantes, os efetivos “cancelamentos” pressupõem a participação de empresas ou de qualquer outro agente econômico e uma relação de dependência ou subordinação.
Palavras-chave: “cancelamento”, entretenimento, dependência econômica, redes sociais, celebridades.
Aquilombamento poético na encruzilhada do saber
Authors: Costa Naloana de Lima 
Published: June 2022

Partindo de um posicionamento que traz um sentido ético-político emancipatório da existência humana, direciono uma interpretação sobre identidade brasileira ancorada aos movimentos anticapitalista, antirracista e antisexista, presente na poética do espetáculo Severina da Morte a Vida (2015) encenada pelo Grupo Clariô de Teatro. Coletivo este que se identifica na encruzilhada de um teatro negro, periférico, feminista e popular, e assim, evidentemente, se contrapõe a um teatro dito “brasileiro”, mas que em sua natureza carrega um valor colonial e imperial camuflado de universal, que vira às costas para a America Latina e ignora a representatividade negra de mais de metade da população. Portanto, é legítima a necessidade de clarificar a cultura de uma cena em sombras, através de uma perspectiva humanitária de aquilombamento social.
Narrativas docentes: diálogos entre o cuidado e a produção de conhecimento
Authors: Xavier Luiza Ribeiro 
Published: June 2022

Com a pandemia do SARS-CoV-2, as escolas públicas de São Paulo transitaram entre aberturas, fechamentos e flexibilizações das atividades escolares. Nesse contexto, um grupo de pesquisa ligado à FEUSP, que tem como objetivo construir um currículo implicado com as questões de gênero, raça e classe, buscou contribuir com a rede de apoio de quatro escolas públicas do estado de São Paulo. Para tanto, o grupo realizou diversas atividades nas comunidades escolares, entre elas, um grupo com os professores na modalidade online, coordenado por uma psicóloga, com o objetivo de oferecer um espaço de reflexão dos sentimentos dos professores e possibilitar o acolhimento das angústias relacionadas às dinâmicas educacionais no contexto atual. Neste trabalho, proponho-me a analisar o relato de um dos encontros deste grupo, no qual, a partir da rememoração das experiências que os levaram a escolher a profissão, foram compartilhadas oralmente algumas narrativas docentes.
Permanência prolongada na postura sentada e desconforto físico em estudantes universitários
Authors: Caromano Fátima Aparecida , Amorim Cristina Aparecida Padoin de , Rebelo Cristina de Fátima , Contesini Adriana Maria , Fávero Francis Meire , Frutuoso Jecilene Rosana Costa , Kawai Milena Missa , Voos Mariana Callil 
Published: June 2022

A evolução do homem promoveu adoção da postura sentada por períodos prolongados, induzindo alterações biomecânicas e fisiológicas no corpo. No ensino, a adoção desta postura pode induzir distúrbios musculoesqueléticos e desconforto físico, associado ou não com aprendizagem. Objetivo:Quantificar e caracterizar o tempo de permanência na postura sentada por estudantes universitários e avaliar relação do tempo com queixas de dor e/ou desconforto. Método: Estudo quali-quantitativo. Coleta dos dados feita por meio de diário. Participaram 47 universitários que registraram número de horas na postura sentada, atividades, presença de dor e/ou desconforto e responderam pergunta aberta sobre suas observações referentes ao período experimental. Foi realizada análise estatística descritiva e calculado o coeficiente de correlação de Spearman entre elas, duas a duas. As respostas à pergunta aberta foram categorizadas e agrupadas segundo a frequência e similaridade. Resultados: Estudantes avaliados permaneceram longos períodos sentados (13,4 DP 1,5 horas). Percepção de desconforto do mobiliário foi relevante. Queixas de desconforto e/ou dor podem estar relacionadas com a permanência prolongada na postura sentada. Os locais com mais queixas de dor foram a cabeça, região cervical, ombros e lombossacral. Quanto maior o tempo na postura sentada, maior a incidência de queixas dor. Não se pode afirmar que a dor provoque ou aumente o nível de estresse. Conclusão: O diário foi ferramenta útil para coleta de dados e serviu como instrumento de interferência na auto-observação e autocuidado. Este estudo contribui para o entendimento de como a postura sentada afeta universitários e fornece indicadores para futuras intervenções.
Eyewall Asymmetries and Their Contributions to the Intensification of an Idealized Tropical Cyclone Translating in Uniform Flow
Authors: Martinez Jonathan , Davis Christopher A. , Bell Michael M. 
Published: June 2022

Abstract
Scale-dependent processes within the tropical cyclone (TC) eyewall and their contributions to intensification are examined in an idealized simulation of a TC translating in uniform environmental flow. The TC circulation is partitioned into axisymmetric, low-wavenumber (m = 1–3), and high-wavenumber (m > 3) categories, and scale-dependent contributions to the intensification process are quantified through the azimuthal-mean relative (vertical) vorticity and tangential momentum budgets. To further account for the interdependent relationship between the axisymmetric vortex structure and eyewall asymmetries, the analyses are subdivided into three periods—early, middle, and late—that represent the approximate quartiles of the full intensification period prior to the TC attaining its maximum intensity. The asymmetries become concentrated among lower azimuthal wavenumbers during the intensification process and are persistently distributed among a broader range of azimuthal scales at higher altitudes. The scale-dependent budgets demonstrate that the axisymmetric and asymmetric processes generally oppose each other during TC intensification. The axisymmetric processes are mostly characterized by a radial spinup dipole pattern, with a tangential momentum spinup tendency concentrated along the radius of maximum tangential winds (RMW) and a spindown tendency concentrated radially inward of the RMW. The asymmetric processes are mostly characterized by an opposing spindown dipole pattern that is slightly weaker in magnitude. The most salient exception occurs from high-wavenumber processes contributing to a relatively modest, net spinup along the RMW between ∼2- and 4-km altitude. Given that the maximum tangential winds persistently reside below 2-km altitude, eyewall asymmetries are primarily found to impede TC intensification.

Significance Statement
The convection fueling a tropical cyclone progressively organizes into a compact region called the eyewall where the strongest winds and rainfall occur. As the tropical cyclone intensifies, convection in the circular eyewall becomes more uniform, and the eyewall takes the appearance of a ring. We call this ring shape the “symmetric” part of the eyewall. As convection in the eyewall evolves and interacts, the eyewall becomes deformed and develops wiggles. We call these wiggly shapes the “asymmetric” parts of the eyewall. We demonstrate that the symmetric part of the eyewall helps intensification. The asymmetric parts of the eyewall mostly hurt intensification except during the earlier stages. Our results indicate that a symmetric eyewall shape is preferable for tropical cyclone intensification.
The Hernia Coding Conundrum: A Potential Benefit of the International Hernia Collaboration Online Social Media Platform
Authors: Beeson Seth , Faulkner Justin , Durbin Breanna , Miller John , Hope William 
Published: June 2022

Background Despite various resources on the subject, there remain questions regarding billing and coding hernia surgery. Recently, social media has been used to disseminate information in about surgery. The purpose of this project is to evaluate posts relating to coding through one online social media platform. Materials and Methods The International Hernia Collaboration Facebook site was queried with terms relating to coding. Inclusion criteria were post discussing coding on the site. Posts relating to coding were reviewed by at least 2 reviewers. Number of comments, main topic of question, and additional information about codes were recorded and descriptive statistics generated. Results There were 100 posts found using the search term coding of which 85 met inclusion criteria. Post ranged from 5/2014 to 6/2021. Posts were from 72 surgeons with an average of 12 responses per post. Posts most commonly related to ventral and incisional hernia (53) followed by inguinal (18), other (19), diaphragm (4), and inguinal/ventral (1). For the ventral/incisional hernia, the most common posts were related to myofascial release techniques (29) followed by mesh (6), botox (5), hernia prevention (3), other (3), robotic surgery (2), open surgery (2), rectus diastasis (2), and laparoscopy (2). Discussion There remains controversies over coding for hernia repair particularly myofascial releases in ventral and incisional and new techniques using the robot. An online social media platform appears to be a viable way to disseminate coding information and generate discussion. Further study is needed to evaluate the role of social media for coding.
Recurrent Strokes in Patients With Atrial Fibrillation Treated With Direct Oral Anticoagulant Agents
Authors: Frol Senta , Hudnik Liam K. , Sernec Lana P. , Šabovič Mišo , Šurlan Popovič Katarina , Pretnar Oblak Janja 
Published: June 2022

Recurrent ischemic strokes (IS) in patients treated with direct oral anticoagulant agents (DOACs) are rare. Knowledge regarding the type of recurrent IS and predisposing factors is insufficient. We analyzed a cohort of 1001 patients (77.6 ± 9.2 years; females: 57.1%) with non-valvular atrial fibrillation (AF) treated with DOACs as part of secondary prevention after initial IS or transient ischemic attack. Cardiovascular risk factors, stroke etiology, and Fazekas score based on computed tomography images at the time of the initial IS were assessed. Low Fazekas scores were defined as 0 or 1 and high scores were 2 or 3. Recurrent IS occurred in 46 patients (4.6%, annual rate 1.6%) during the observation period (2.8 ± 1.8 years). Stroke was cardioembolic in 20 patients (43.5%), lacunar in 19 patients (37.5%) and large artery stroke in 6 patients (19.2%). Non-cardioembolic stroke was more common (75.0 vs 26.7%; P = .002) in patients with high Fazekas scores. Arterial hypertension was more frequent ( P = .027) in patients with high (93.3%) vs low (68.8%) Fazekas scores. Recurrent IS was predominantly non-cardioembolic with higher Fazekas score and arterial hypertension as predisposing factors. The reported hypothesis-generating results regarding the clinical relevance of the Fazekas score should be further evaluated.
Blood purification therapy in patients with severe COVID-19 requiring veno-venous ECMO therapy: A retrospective study
Authors: Akil Ali , Ziegeler Stephan , Rehers Stephanie , Ernst Erik Christian , Fischer Stefan 
Published: June 2022

Objective: Patients with severe manifestations of COVID-19 might exhibit characteristics of a sepsis-like syndrome that can progress to multiple organ failure and ultimately death. Underlying mechanism have been explored and suggest a profound dysregulation of the immune system associated with hyperinflammation, hemodynamic instability and respiratory failure. Besides standard intensive care treatment, approaches modulating the dysregulated immune response, such as CytoSorb hemoadsorption, have been used. However, data of ECMO-dependent patients in comparison to a control cohort remain scarce. Methods: Included were 26 critically ill COVID-19 patients requiring high-flow veno-venous extracorporeal membrane oxygenation (high-flow VV ECMO) therapy due to severe acute respiratory distress syndrome (ARDS), of whom 16 were additionally treated with an extracorporeal hemoadsorption device, and compared to a control group of 10 patients. Assessed were levels of inflammatory markers, vasopressor requirements, oxygenation parameters, as well as clinically relevant outcome variables. Data were prospectively recorded and retrospectively analyzed. Results: Treatment with the applied multimodal therapy approach resulted in a stabilization in hemodynamics, a control of the hyperinflammatory response as evidenced by a significant reduction in inflammatory mediators, as well as a marked improvement in lung function. No device related adverse events were observed while treatment appeared safe and feasible. Conclusion: Treatment of a critically ill COVID-19 ARDS patients with combined VV ECMO support and hemoadsorption therapy led to a rapid and sustained hemodynamic stabilization, a control of the uncontrolled inflammatory response and an improvement in oxygenation. Given these signals pointing toward a patient-oriented benefit of extracorporeal hemoadsorption therapy in those patients, future controlled, randomized studies should focus on the investigation of the appropriate timing and dosing of this promising treatment modality.
The Effectiveness of Virtual Lactation Support: A Systematic Review and Meta-Analysis
Authors: Blackmore Alicia , Howell Brittany , Romme Kristen , Gao Zhiwei , Nguyen Hai , Allwood Newhook Leigh Anne , Twells Laurie 
Published: June 2022

Background: The World Health Organization recommends lactation support to enhance the rates of exclusive breastfeeding. Access to in person lactation support may be limited due to scarcity of resources (e.g., healthcare professionals) and geography. Advances in technology have allowed lactation supports to be offered virtually through information and communication technologies (i.e., telephone, internet, and social media). Research Aims: To (1) critically review and (2) statistically analyze the effectiveness of virtual lactation support for postpartum mothers’ exclusive breastfeeding for up to 6 months. Methods: A systematic review and meta-analysis were conducted using PRISMA guidelines. Studies were included if they were (a) randomized controlled trials, (b) with a virtual lactation support intervention during the postpartum period, (c) reported on exclusive breastfeeding outcomes. Two reviewers independently assessed the risk of bias and extracted data. The prevalence of exclusive breastfeeding in each group and the total number of participants randomized for each group were entered into random-effects meta-analyses to calculate a pooled relative risk (RR) at three different time points (1, 4, and 6 months). The sample size was 19 randomized control trials. Results: Of the 19 studies, 16 (84.2%) were included in the meta-analysis ( n = 5,254). Virtual lactation support was found to be effective at increasing exclusive breastfeeding at 1 month (RR, 1.21; 95% CI [1.09, 1.35]; p < .001) and 6 months (RR, 1.87; 95% CI [1.30, 2.68]; p < .001). Conclusion: In this meta-analysis of randomized controlled trials comparing virtual lactation support with other postnatal maternity care, virtual lactation support was associated with increasing exclusive breastfeeding rates at 1 month and 6 months postpartum. The study protocol was registered (CRD42021256433) with PROSPERO
A hybrid trim strategy for coaxial compound helicopter
Authors: Su Yuan , Wang Zeyuan , Cao Yihua 
Published: June 2022

Interest in the coaxial compound helicopter (CCH) has been increasing in the civil aviation and engineering community for its high-speed and high-maneuverability features, and is likely to continue to do so for the foreseeable future. Since the control in CCH is totally different from the conventional helicopter, the redundant control strategy design is one of the biggest challenges. In this study, the CCH model based on XH-59A is built to investigate the impact of the propeller and the elevator on the flight performance. Four trim strategies with different objectives are proposed and then compared to find the optimal control allocation. A heuristic descent search method is applied to search the optimal velocity at which the propeller and the elevator are engaged. A significant improvement of power required at medium- and high-speed with acceptable rotor airloads increment was found by using the Hybrid Trim strategy in the speed range of 0–100 m/s, with regard to a pre-configured pitch angle schedule. The corresponding control variables obtained located in a reasonable control range, with a maximum power reduced of 13% at 100 m/s, which showcase the potential of the Hybrid Trim strategy.