bluuebunny/crossref_metadata_2025_split huggingface dataset:
Impact of Helium ii Resonant Absorption on the Ultraviolet Background Modeled in Three Dimensions
Authors: Huscher Ezra , Finlator Kristian , Kušmić Samir , Steen Maya 
Published: April 2024

Abstract
We implement a treatment of helium ii absorption and reemission into the Technicolor Dawn cosmological simulations to study its impact on the metagalactic ultraviolet background (UVB) in three dimensions. By comparing simulations with and without He ii reprocessing, we show that it weakens the mean UVB by ∼3 dex from z = 10–5 between 3.5 and 4 Ryd, where the He ii Lyman series resonance occurs. In overdense regions, the overall UVB amplitude is higher, and the impact of He ii reprocessing is weaker, qualitatively indicating an early start to He ii reionization near galaxies. Comparing our simulations to two popular one-dimensional UV models, we find good agreement up to 3 Ryd at z = 5. At higher energies, our simulation shows significantly greater He ii absorption because it accounts for He ii arising both in diffuse regions and in Lyman limit systems. By contrast, the comparison models account only for He ii in Lyman limit systems, which are subdominant prior to the completion of He ii reionization. The H i and He ii reionization histories are nearly unaffected by He ii reprocessing, although the cosmic star formation rate density is altered by up to 4%. The cosmic mass density of C iv is reduced by ∼2 dex when He ii is accounted for, while Si iv, C ii, Mg ii, Si ii, and O i are unaffected.
Synthetic Gaia DR3 Surveys from the FIRE Cosmological Simulations of Milky Way-mass Galaxies
Authors: Nguyen Tri , Ou Xiaowei , Panithanpaisal Nondh , Shipp Nora , Necib Lina , Sanderson Robyn , Wetzel Andrew 
Published: April 2024

Abstract
The third data release (DR3) of Gaia has provided a fivefold increase in the number of radial velocity measurements of stars, as well as a stark improvement in parallax and proper motion measurements. To help with studies that seek to test models and interpret Gaia DR3, we present nine Gaia synthetic surveys, based on three solar positions in three Milky Way-mass galaxies of the Latte suite of the Fire-2 cosmological simulations. These synthetic surveys match the selection function, radial velocity measurements, and photometry of Gaia DR3, adapting the code base Ananke, previously used to match the Gaia DR2 release by Sanderson et al. The synthetic surveys are publicly available and can be found at http://ananke.hub.yt/. Similarly to the previous release of Ananke, these surveys are based on cosmological simulations and thus are able to model nonequilibrium dynamical effects, making them a useful tool in testing and interpreting Gaia DR3.
Changing-look Active Galactic Nuclei. I. Tracking the Transition on
the Main Sequence of Quasars
Authors: Panda Swayamtrupta , Śniegowska Marzena 
Published: April 2024

Abstract
This paper is the first in a series of papers that prepare and analyze spectral
and other properties for a database of already-discovered changing-look active
galactic nuclei (CL AGNs). Here we focus on the spectral fitting and analysis of
broad emission lines in a sample of 93 CL AGNs collected from the literature
with existing Sloan Digital Sky Survey (SDSS)/Baryon Oscillation Spectroscopic
Survey (BOSS)/extended-BOSS spectroscopy where the Hβ emission-line profile does not completely disappear in any
epochs. Additionally, we have gathered older/newer spectral epochs from all the
available SDSS data releases to make the database more complete. We use
PyQSOFit and perform a homogeneous spectral decomposition of all of
our SDSS spectra and tabulate the AGN continuum and emission-line properties per
epoch per source, chronologically. This further allows us to categorize the
sources in our sample as Turn-On or Turn-Off and subsequently check for repeated
occurrences of such phases. We then estimate the black hole mass (M
BH) and the Eddington ratio (λ
Edd) per epoch per source where the required parameters are available
and well estimated. We demonstrate the movement of the source in the M
BH–λ
Edd plane, allowing us to check for systematic changes in the
source’s fundamental properties. We then track their transition along the
optical plane of the Eigenvector 1 schema and categorize sources that either
stay within the same population (A or B) or make an interpopulation movement as
a function of spectral epoch. We also test the Balmer decrement (Hα/Hβ) of a subset of our
sample of CL AGNs as a function of time and AGN luminosity.
Implantação do projeto CRQ Verde: a A3P promovendo responsabilidade socioambiental no Conselho Regional de Química da 1ª Região (PE/BRASIL)
Authors: Amorim Ana Catarina Gomes de , Rodrigues Sofia Suely Ferreira Brandão , Lyra Marília Regina Costa Castro , Dutra Maria Tereza Duarte , Paz Diogo Fernandes Henrique Da 
Published: April 2024

Os órgãos públicos são grandes consumidores dos recursos naturais em suas atividades rotineiras e com a finalidade de minimizar estes impactos se faz necessária a utilização de programas, como é o caso da Agenda Ambiental da Administração Pública (A3P), que permite aos órgãos públicos rever seus padrões de consumo. Neste sentido o objetivo deste trabalho consistiu em elaborar o projeto CRQ Verde para disseminação de práticas socioambientais no Conselho Regional de Química da 1a Região (CRQ-1), utilizando a A3P. Utilizou-se como metodologia a pesquisa-ação, realizando-se primeiramente um diagnóstico socioambiental, seguido da elaboração do Plano de Logística Sustentável. A partir disso, foi possível identificar as ações ambientais já existentes no órgão, no empresarial onde o mesmo está inserido e dar início a implantação de novas ações. Também foi possível constatar por meio de estudo comparativo que 87% dos indicadores da A3P estão relacionados com o ODS 12 da Agenda 2030.
Sistema distribuído de votação via internet através do uso de smart contracts
Authors: Lima Wesley Felix de , Vasconcelos Daniela Manetta , Grassi Flavio 
Published: April 2024

No Brasil, as urnas eletrônicas sempre foram alvo de críticas pois os eleitores não sabem se de fato os votos realmente foram para os candidatos desejados. Assuntos como imutabilidade, integridade e transparência dos votos sempre emergem. O presente artigo sugere o uso de duas tecnologias, que são o blockchain e smart contracts, como proposta de utilizá-los em um sistema distribuído de votação, feito a partir da Internet, que tem seus dados registrados e validados através de uma rede de computadores, o que garante o chamado consenso. Com o grande impacto das criptomoedas, temos o surgimento da plataforma Ethereum, onde é possível realizar transações online através do uso de smart contracts, não somente para aplicações financeiras de moedas digitais. O presente artigo propõe ainda uma análise exploratória sobre essas tecnologias. Para tal, criamos uma simulação de votação através da plataforma Ethereum e de um smart contract programado em Solidity para demonstração da aplicação. Com resultados positivos da simulação, o uso das tecnologias aqui abordadas deixa evidente que sua implementação seria um grande passo para democracia, além da redução de custos, desperdícios, e da melhora da imagem corporativa.
Digitalização baseada na arquitetura RAMI e OEE: estudo de caso em empresa do subsetor termoplástico do polo industrial de Manaus
Authors: De Oliveira Júnior Manoel Carlos , Breval Santiago Sandro , De Lima Orlem Pinheiro , Ribeiro Maduro Marcia , De Jesus dos Santos Alyson 
Published: April 2024

O artigo demonstra a relação entre as camadas da arquitetura RAMI 4.0 com o OEE (Overall Equipment Effectiveness), a partir de uma análise bibliométrica com parâmetros de busca específicos nas bases Scopus e Web of Science. Em outra vertente da pesquisa, foi realizado estudo de caso em uma empresa do Polo Industrial de Manaus, do setor de termoplásticos, por meio do qual as relações identificadas na literatura puderam ser medidas. Os resultados apontam que determinadas camadas (integração e comunicação) tem maior impacto nas ocorrências relacionadas ao OEE no componente Performance (queda de velocidade, pequenas paradas e ociosidades). A camada Integração contempla os aspectos tecnológicos ligados à transição físico-digital, as quais foram legitimadas pelo estudo de caso no processo de digitalização desenvolvido. Os resultados apontaram para melhor agilidade e responsividade do processo produtivo com melhoria do componente performance do OEE
Laboratórios de inovação, coprodução, desenvolvimento e territórios inteligentes: potencialidades no contexto da América Latina
Authors: Da Silva Junior Alessandro Carlos , Emmendoerfer Magnus Luiz , De Almeida Thiago Chagas , Mediotte Elias José 
Published: April 2024

O objetivo deste ensaio é discutir as potencialidades dos laboratórios de inovação para a coprodução e o desenvolvimento de territórios inteligentes. Foi realizado um estudo bibliográfico sobre o tema, procurando identificar conexões e implicações para o contexto da América Latina. Observou-se que os laboratórios de inovação podem oferecer espaços de coworking e trocas informacionais. Como conclusão, indica-se que os laboratórios de inovação podem ser uma alternativa pertinente para o aprendizado coletivo dos agentes no desenvolvimento de soluções inovadoras e cocriação de uma identidade local. Dessa forma, este trabalho evidencia a importância de um mecanismo de intercâmbio multilateral para o planejamento urbano (laboratório de inovação), especificamente para o contexto latino-americano. Tal mecanismo teria a capacidade de auxiliar – por meio da criação de redes colaborativas – a gestão de cidades e políticas públicas para enfrentamento dos problemas sociais.
Women Politicians, Social Movements, and Misogyny in Democratic Struggles
Authors: Liao Sara 
Published: April 2024

In this essay, I investigate the relationship among women in politics, social movements, and misogyny through an examination of public discourse surrounding women politicians—in particular, Carrie Lam, the former chief executive of Hong Kong. The participants in a series of protests in Hong Kong against an anti-extradition bill that began in 2019 generated a large volume of audiovisual materials for the purpose of raising social consciousness, conducting civic education, and creating networks for solidarity. Many of these protest materials contained blatantly misogynistic messages targeting pro-establishment women politicians. I focus on women leaders to explore gender politics in social movements. In assessing the public discourse about Lam during the 2019 movement, I demonstrate that gender politics is consistently inscribed within social movements in postcolonial Hong Kong, in which context the progressive pursuit of democracy, self-determination, and freedom remains imbued with patriarchal culture, including paternalism. This patriarchal culture, unsurprisingly, combines seamlessly with sexism, misogyny, and a gendered imagination of the city’s possible political futures.
Le marché pour le portrait de Louis XIV par Nicolas Pitau d’après Claude Lefèbvre (1669-1670)
Authors: Mathis Rémi 
Published: April 2024

Le 25 septembre 1669, un étudiant au collège de Navarre, Louis-Marcel de Coëtlogon, commande au graveur Nicolas Pitau 1500 épreuves d’une estampe, enluminée et comprenant les positions de thèses, tirée sur un papier dont il remet un échantillon. L’estampe représente Louis XIV, d’après un tableau de Claude Lefebvre. Coëtlogon paye pour cela 2000 livres, en trois versements, le dernier ayant lieu le 19 mars 1670. Malade, Pitau a fait appel à l’aide du jeune graveur Gérard Edelinck.
Polyclonally Derived Alloantigen-Specific T Regulatory Cells Exhibit Target-Specific Suppression and Capture MHC Class II from Dendritic Cells
Authors: Oya Yoshihiro , Tanaka Yasuyo , Nakazawa Takuya , Matsumura Ryutaro , Glass Deborah D , Nakajima Hiroshi , Shevach Ethan M 
Published: April 2024

Abstract
Foxp3+ T regulatory (Treg) cells prevent allograft rejection and graft-versus-host disease. Although polyclonal Tregs have been used both in animal models and in humans, the fine specificity of their suppressive function is poorly defined. We have generated mouse recipient-derived alloantigen-specific Tregs in vitro and explored the fine specificity of their suppressive function and their mechanism of action in vitro and in vivo. In vitro, when alloantigen and peptide Ag were both presented on the same dendritic cell, both responses were suppressed by iTregs specific either for the alloantigen or for the peptide Ag. In vivo, iTreg suppression was limited to the cognate Ag, and no bystander suppression was observed when both allo-antigen and peptide Ag were present on the same dendritic cell. In vitro, alloantigen-specific Tregs captured cognate MHC but failed to capture noncognate MHC. Our results demonstrate that a polyclonal population of iTregs generated from naive T cells can mediate highly specific function in vivo and support the view that Treg therapy, even with unselected polyclonal populations, is likely to be target antigen-specific and that bystander responses to self-antigens or to infectious agents are unlikely.
Study of Cerebral Hemispheric Lateralization in Stroke and the Arterial Territories Involved in High-risk Patients
Authors: Prerana B. , Nivargi Shubha , Jayanthi V. 
Published: April 2024

Introduction:
According to WHO, Stroke is the 2nd leading cause of death and disability after Ischemic heart disease. Prevalence rate of stroke in India varies from 44.45 to 150 per lakh population. Studies have reported a higher frequency of stroke of the left hemisphere. The artery reported to be the most affected is Left Middle Cerebral artery(MCA) followed by Right Middle Cerebral artery. The aim of this study is to determine the side of cerebral hemisphere most affected by stroke and the arterial territories involved in high-risk patients aged above 35 years presenting to the tertiary healthcare centre, as well as to study the sex predilection of stroke.

Materials and Methods:
A cross-sectional prospective study of 50 high risk stroke patients with Diabetes Mellitus(DM) and /or Hypertension(HTN) presenting to General medicine OPD of a tertiary healthcare centre were investigated with CT/MRI for the side of the cerebral hemisphere affected and the arterial territories involved. The data was tabulated over the course of three months and statistical analysis was carried out.

Results:
The left cerebral hemisphere was affected in 50%, right in 40% and bilateral involvement was found in 10% patients. Slight predilection of stroke towards the left was seen, however it was not found to be statistically significant (P-value= 0.249). MCA territory was involved in 66% of the patients, Posterior Cerebral Artery(PCA) territory in 8%, Vertebrobasilar Artery(VB) territory in 8%, Anterior Cerebral Artery(ACA) territory in 6% and MCA+ACA in 4%, MCA+VB in 2% and MCA-PCA watershed in 6% patients.

Conclusions:
We found a slight predilection of stroke towards the left, which was however, not found to be statistically significant. We also found that Middle Cerebral Artery(MCA) territory is the most commonly involved in stroke.
A Cadaveric Study On Clinical Correlations of the Internal Jugular Vein and its Variations
Authors: Maniyar Roshan Zameer , Deshmukh Sandeep S. , Vrushali K. , Meenakshi P N 
Published: April 2024

Introduction:
The largest paired vein is the internal jugular vein (IJV), which rests laterally adjacent to the main the common carotid artery (CCA) within the carotid triangle at the extremities of the neck. It is the main source of blood flow down from the sigmoid sinus of dural venous sinuses. The obstruction of blood flow or distension of the internal jugular vein can lead to increasing intracranial pressure in the brain and face. The increased the right atrial pressure can be a sign of heart failure, cardiovascular problems, and pulmonary embolism. The aims are to study and note down variations in the course and relations of the internal jugular vein and variations of tributaries of right IJV and left IJV diameter and effects on cardiovascular diseases.

Materials and Methods:
An observational based cadaveric study was conducted on twenty-four unclaimed embalmed cadavers were dissected from March 2021 to August 2023 in Bidar Institute of Medical Sciences, Bidar, Karnataka, India. Dissection procedure was followed by Cunningham’s manual of practical anatomy volume-3 book. Variations and pattern of bilateral internal jugular veins were observed.

Results:
External jugular vein access is a highly advantageous location for a heart catheterization. The tributaries of the internal jugular vein form the trunk and overlap on the common carotid artery bifurcation, which leads to adverse effects on baroreceptors and chemoreceptors at the level of divisions of internal and external carotid arteries. The pattern of the right and left internal jugular is quite significant.

Conclusion:
The study will generate information that would be useful for surgeons, and other clinical physicians and give necessary morphometric data on the internal jugular vein in the South Indian population.
Human Leukocyte Antigen-B51 Association and Behcet’s Disease in Saudi Arabia
Authors: Qushmaq Khalid A. , Albirdisi Majed R. , AlAsiri Mohannad M. , Andijani Ahmad I. , AlJurayyan Abdullah 
Published: April 2024

Introduction:Behcet’s disease (BD) is a chronic systemic inflammatory vasculitis of unknown etiology, characterized by recurrent oral ulcers, genital ulcers, skin lesions, ocular lesions, and other systemic manifestations. The pathogenesis of BD is unclear. Multiple studies have suggested close correlation between BD and human leukocyte antigen-B51 (HLA-B51) as a genetic factor. In our study, we aim to identify the association of HLA-B51 as a risk factor and its association with the multiple clinical signs and symptoms of Saudi BD patients in the kingdom of Saudi Arabia.Materials and Methods:A retrospective study was conducted at a tertiary treatment center in the rheumatology subspecialty clinics, Riyadh, Saudi Arabia, from 2013 to 2018. The study was conducted by searching the hospital database for BD and HLA-B51.Results:HLA-B51 positivity was observed in 20 of the 38 patients in our sample, accounting for about a quarter of the total (52.6%).Conclusion:Our retrospective study found that HLA-B51 was positive in 52.6% of Saudi patients attending a single tertiary care center. However, a larger multicenter study is required to validate these observational data.
Glycated hemoglobin as a predictor for gestational diabetes
Authors: Emam Rania Mostafa , Nassef Aziza H. , Abou-Raia Hanaa 
Published: April 2024

Background
Gestational diabetes mellitus (GDM) may cause fetomaternal complications. GDM can be diagnosed conventionally by an oral glucose tolerance test (OGTT). Glycated hemoglobin (HbA1c) is a marker for the blood glucose level in the previous 2–3 months.

Objective
The aim was to assess the role of using HbA1c as a predictor for developing gestational diabetes in the second trimester.

Patients and methods
Fifty pregnant women were investigated by ultrasound, and HbA1c and OGTT were performed for all cases at 18–22 weeks of gestation and repeated at 32–36 weeks of gestation.

Results
There were statistically significant differences between women with HbA1c value less than 5.7% and those with 5.7–6.4% according to BMI, parity, and maternal weight. A positive correlation was detected between HbA1c level and development of GDM according to OGTT, which was done in the third trimester, as women with HbA1c values less than 5.7% have decreased risks of developing GDM than women with higher levels of HbA1c. Follow-up of all cases detected significant relation between level of HbA1c and neonatal birth weight, neonatal ICU admission, and APGAR score, where the pregnant women whose HbA1c less than 5.7% got infant with less birth weight and better APGAR score and the incidence of neonatal ICU admission was less in their infants.

Conclusion
HbA1c can be used to predict the development of GDM in second trimester. Receiver operating characteristic curve identified that the best cutoff value of HbA1c was 5.2%, with sensitivity of 75%, specificity of 80%, positive predictive value of 71.4%, negative predictive value of 82.8%, with accuracy of 87.2% for diagnosing GDM.
Comparison of corneal changes after phacoemulsification in diabetic and nondiabetic eyes
Authors: Elminshawy Asmaa Ibrahim , Hegazy Hanan Saied , Aly Mona Mohamad 
Published: April 2024

Background and aim
Endothelium of the cornea is susceptible to surgical trauma during phacoemulsification from ultrasound energy. Several studies have reported various results of corneal changes after phacoemulsification in diabetic and healthy patients. The aim was to evaluate and compare changes in precorneal tear film, anterior and posterior corneal surfaces, endothelial cell changes, and central corneal thickness (CCT) between diabetic and healthy patients before and after uneventful phacoemulsification.

Patients and methods
A total of 40 eyes of 40 patients who were scheduled for cataract surgery were divided into group 1 (20 eyes in nondiabetic patients) and group 2 (20 eyes in diabetic patients). Ophthalmological examinations, including uncorrected and best-corrected visual acuity (BCVA), slit lamp to examine anterior and posterior corneal surfaces, tear film breakup time test (TBUT), anterior chamber depth by IOL Master (Topcon ALADDIN HW2.0), and specular microscopy (Topcon SP-1P, made In Japan), were done preoperatively and at 1 week, 1 month, and 3 months postoperatively.

Results
Significant differences were found between preoperative and postoperative periods in both groups regarding BCVA, TBUT, CCT, endothelial cell density (ECD), coefficient of variation, and hexagonal cells, except that changes became insignificant with respect to CCT at 3 months in nondiabetic and at 1 week and 3 months in diabetic and in CD at 1 month in healthy patients.

Conclusion
There were significant changes in BCVA, TBUT, CCT, and ECD after phacoemulsification in the diabetic and healthy groups. There was a significant delay in the recovery of CCT 1 month after phacoemulsification in the diabetic compared with healthy individuals.