bluuebunny/crossref_metadata_2025 huggingface dataset:
ACHADOS LAPAROSCÓPICOS DE ENDOMETRIOSE EM PACIENTES DA CLÍNICA FÉRTILE - REPRODUÇÃO HUMANA EM GOIÂNIA-GO
Authors: Fernandes Lorrana Estevam , Amaral Henrique Estevam Fernandes , Rover Luciana Fernandes , Amaral Waldemar Naves do
Published: November 2024

A endometriose é uma condição patológica na qual células endometriais se desenvolvem fora da cavidade uterina. Os sintomas são variados (dor pélvica, dispareunia, dismenorreia, entre outros) e a severidade depende da localidade anatômica do acometimento. Além disso, a patologia pode afetar pacientes de qualquer idade, mas é mais frequentemente encontrado em mulheres em idade reprodutiva. Neste âmbito, o entendimento do perfil epidemiológico de endometriose pode auxiliar no desenvolvimento de políticas de saúde e no conhecimento do risco de progressão da doença quando não tratada ao longo do tempo. No presente trabalho, foram analisados 1400 laudos de videolaparoscopias, realizados no período de 2015 à 2021, atendidas na Clínica Fértile - Reprodução Humana (Goiânia-GO) e foram selecionados os exames de laparoscopia diagnóstica realizados em mulheres com idades de 16 a 50 anos, as quais apresentaram achados de endometriose e que seguem o estadiamento do American Fertility Society. Posteriormente, os dados coletados foram sistematizados (de acordo com a faixa etária, estágio de endometriose e os achados laparoscópicos de endometriose) e apresentados utilizando ferramentas gráficas. Do grupo de estudo selecionado e analisado (n = 206), foi observado o maior quantitativo (n = 18) para mulheres com 34 anos, representando 8,7%. Relativamente a classificação do estágio da doença, o estágio IV foi prevalente em toda a faixa etária de estudo (< 35 anos; 29,2%) e (35-50 anos; 39,7%). Adicionalmente, o achado laparoscópico de endometriose mais predominante foi no fundo de saco (n = 134; 65%). Sendo assim, a identificação do perfil epidemiológico (faixa etária/frequência, estágio de endometriose e achado laparoscópio) abrirá caminhos para a determinação de meios mais eficientes para diagnóstico e consequentemente um tratamento efetivo e que não apresente efeitos secundários.
TRATAMENTO DE LESÃO GRAVE DE TRONCO DE CORONÁRIA ESQUERDA POR VIA HEMODINÂMICA
Authors: Rocha Thaís Bastos
Published: November 2024

Em comparação às outras estenoses das artérias cardíacas, a estenose de tronco de coronária esquerda está associada a um maior risco de mortalidade e lesão miocárdica devido à maior quantidade de miocárdio subtendido. Para o tratamento, a cirurgia de revascularização miocárdica e intervenção coronária percutânea são indicadas. Sendo assim, esse trabalho tem como objetivo principal apresentar os benefícios do tratamento de lesão de tronco de coronária por via hemodinâmica e relatar um caso de um tratamento de lesão grave de tronco da coronária esquerda. Trata-se de um relato de caso e uma revisão integrativa da literatura. A busca foi realizada nas bibliotecas PubMed e Scielo. Foram incluídos trabalhos que discorreram sobre o tema proposto para o estudo nos idiomas português e inglês, com textos completos e disponíveis nas versões gratuitas. Com isso, conclui-se que em pacientes com estenose do tronco da coronária com baixa e média complexidade de doença arterial coronariana coexistente, o tratamento ICP oferece um desfecho favorável a longo prazo, portanto, constitui uma terapia alternativa para CRM. Enquanto a doença complexa é melhor tratada com CRM. Para avaliação o escore SYNTAX angiográfico pode ser utilizado para indicação da melhor ferramenta de tratamento.
ANOMALIAS ANATÔMICAS DAS MAMAS
Authors: Matos Moraes Marina Emilia de , Mouallem Debora Alves , Ribeiro Thalles Eduardo , Oliveira Daniely Sousa Macedo , Silva Ribeiro João Henrique Paz da , Cruz Junior Mário Alves da , Paula Anna Karollinna Pimenta de , Sousa Juarez Antônio de
Published: November 2024

As anomalias anatômicas da mama são alterações na composição estrutural mamária. Objetivos: O presente estudo tem como objetivo elencar as principais deformidades, ressaltando a relevância do conhecimento acerca da anatomia desse órgão. Resultados: a análise da literatura permite dividir, de forma didática, as anomalias mamárias em numéricas ou estruturais, sendo geralmente originadas durante a embriogênese ou o desenvolvimento puberal. O diagnóstico e possíveis tratamentos são pautados no histórico individual, levando-se em consideração inseguranças e receios femininos. Conclusão: as anormalidades anatômicas das mamas são quadros que influenciam diretamente os aspectos físicos e emocionais das mulheres, devendo ser, portanto, minuciosamente investigados.
DOENÇA DE PAGET DA MAMA
Authors: Ribeiro Thalles Eduardo , Mouallem Debora Alves , Oliveira Daniely Sousa Macedo , Silva Ribeiro João Henrique Paz da , Alves Junior Mário , Matos Moraes Marina Emilia de , Oliveira Macedo Patrícia de , Sousa Juarez Antônio de
Published: November 2024

A Doença Mamária de Paget (DMP) é um tipo de adenocarcinoma que afeta o complexo aréolo-mamário. Sua apresentação incomum pode ser confundida com condições inflamatórias ou dermatológicas. A DMP está associada a neoplasias mamárias e é caracterizada pela presença de células de Paget. Existem teorias sobre sua origem, como a trofoepidérmica e a transformação intraepidérmica. A DMP é mais comum em mulheres entre 50 e 60 anos, geralmente associada a carcinoma in situ ou lesões invasivas. O diagnóstico é difícil e pode levar anos, sendo necessária uma biópsia para confirmação. O tratamento envolve cirurgia e radioterapia, especialmente em casos avançados. O diagnóstico tardio pode impactar negativamente o prognóstico e a qualidade de vida das pacientes.
RELATO DE CASO
Authors: Rocha Isabela Alcântara , Abreu Luciana Hahmann , Alcantara Borges Larissa Manzan de , Penna Heber de Moraes , Elmiro Gustavo Siqueira , Gardenghi Giulliano
Published: November 2024

A esclerodermia é uma doença reumatológica crônica autoimune que causa esclerose progressiva do tecido conjuntivo e da microcirculação evoluindo para variáveis níveis de fibrose tecidual, podendo representar um desafio em procedimentos que necessitam de via aérea avançada, devido à fibrose dos tecidos periorais com limitação da abertura bucal e extensão cervical. Este trabalho apresenta o caso de um paciente do sexo masculino portador de preditores de intubação difícil decorrente das alterações físicas da esclerodermia sistêmica que foi submetido a múltiplas extrações dentárias sob anestesia geral com intubação nasotraqueal com fibroscopia após anestesia intratraqueal no paciente desperto. O intraoperatório seguiu sem intercorrências e o paciente foi extubado após despertar efetivo. O médico anestesiologista utiliza avaliações de diversas variáveis clínicas para predizer uma via aérea de difícil manejo e o sucesso do procedimento está ligado a avaliação minuciosa do paciente e do planejamento de estratégias adequadas.
TUMOR FILÓIDE MALIGNO DE BAIXO GRAU ASSOCIADO A CARCINOMA DUCTAL IN SITU
Authors: Ribeiro Thalles Eduardo , Fernandes Natalia de Souza , Matos Moraes Maria Emilia de , Cruz Junior Mario Alves da , Tagawa Gabriella Silva Garcia , Pinto Sebastião Alves , Sousa Juarez Antonio de
Published: November 2024

INTRODUÇÃO: Tumores filoides são raros na mama, variam de benignos a malignos, raramente associados a carcinomas, principalmente carcinoma in situ. OBJETIVO: Descrever caso clínico de tumor filoide maligno de baixo grau associado a carcinoma ductal in situ GN2. RELATO DE CASO: Paciente E. R. A., 53 anos, apresentou nódulo de crescimento rápido na mama esquerda, no quadrante superior lateral. O exame físico revelou um nódulo bem definido, endurecido e indolor. A mamografia mostrou uma lesão nodular densa de 20 cm, com contornos definidos, localizada no mesmo local. Após uma Punção Aspirativa com Agulha Fina (PAAF) com citologia negativa e axila clinicamente negativa, a paciente passou por quadrantectomia para remoção do tumor com margens de segurança. A avaliação anatomopatológica confirmou um tumor filoide associado a carcinoma ductal in situ de baixo grau, com moderadas atipias celulares e alta expansibilidade. O diagnóstico foi definido por estudo imuno histoquímico, que demonstrou positividade para marcadores específicos. DISCUSSÃO: Tumores filoides (TF) são mais comuns entre a 4ª e 5ª década, principalmente em asiáticas e latinas. Geralmente, são indolores, grandes e firmes, com raros casos de associação com carcinomas. O crescimento considerável (até 41 cm) é comum, e o envolvimento axilar é raro. O diagnóstico é desafiador devido à falta de clareza nos exames de imagem. O tratamento cirúrgico com margens seguras é a opção preferida. CONCLUSÃO: É crucial realizar estudos epidemiológicos para padronizar tratamentos de tumores filoides e, devido à falta de dados, a ressecção completa com margens seguras é a melhor abordagem.
ANÁLISE DOS PARÂMETROS VENTILATÓRIOS E DESFECHOS HOSPITALARES EM PACIENTES VENTILADOS MECANICAMENTE
Authors: Nunes Erika Letícia Gomes , Barbosa Isadora Oliveira Freitas , Campos Maristela Lúcia Soares , Ferreira Bruna Kelly , Gardenghi Giulliano
Published: November 2024

INTRODUÇÃO: A ventilação mecânica é indispensável para o suporte avançado de vida, entretanto, se conduzida de forma inadequada pode danificar o pulmão. Parâmetros como driving pressure (DP) e mechanical power (MP) são importantes mensurações que auxiliam na redução de lesões pulmonares induzidas por ventilação mecânica (LPIV).OBJETIVO: verificar se os parâmetros ajustados nas unidades de terapia de intensiva (UTI), em um hospital de urgência, estavam dentro do recomendado pela literatura, e também os desfechos hospitalares dos pacientes. MÉTODOS: Estudo transversal, de indivíduos internados nas UTI’s de um hospital de urgências. Foram coletados dados referentes a internação, sinais vitais e parâmetros ventilatórios. RESULTADOS: 99 indivíduos foram estudados, 71% sexo masculino. Apenas 8,1% dos valores de DP se encontravam altos (superior a 15cmH2O). O MP, em 21,2% dos pacientes, estava acima de 17J/min. O principal desfecho observado na amostra foi a mortalidade de 63,8%. Os valores de SpO2 estavam acima de 95% em 64,6% das avaliações. CONCLUSÃO: Em algumas situações os parâmetros ventilatórios estavam ajustados de maneira não protetora de acordo com a literatura científica (8,1% de DP e 21,2% de MP aumentados). Os valores de SpO2 estavam frequentemente elevados, o que se relaciona diretamente a LPIV. Tais achados podem estar associados com a mortalidade na população estudada.
Relato de caso
Authors: Toledo Rhaissa Alvarenga de , Nóbrega Isabelle Martins , Pereira Andressa Oliveira , Santos Leonardo Eterno Medeiros dos
Published: November 2024

O artigo em questão descreve um caso clínico de hemorragia digestiva proveniente do intestino delgado, uma condição que exige estratégias diagnósticas desafiadoras, principalmente em pacientes da rede pública de saúde. O relato de caso detalha a apresentação clínica do paciente e a sequência diagnóstica complementar envolvida na elucidação do quadro, com o emprego da enteroscopia intraoperatória para identificação do provável sítio de sangramento para abordagem cirúrgica resolutiva. Durante o procedimento cirúrgico, os cirurgiões conseguiram realizar uma avaliação que poucos centros de urgência possibilitariam, com a mobilização da equipe de endoscopia digestiva e cirurgia do aparelho digestivo para a realização da enteroscopia intraoperatória. O objetivo do relato de caso é fornecer uma descrição detalhada de um caso clínico específico, demonstrando a apresentação clínica, o diagnóstico, o tratamento e a evolução dessa condição, com ênfase na dificuldade diagnóstica para o adequado tratamento. Por fim, as considerações finais, os resultados foram analisados à luz da literatura médica e discutidos em termos de diagnóstico, manejo terapêutico e desafios específicos encontrados durante o tratamento da paciente.
Effect of preoperative analgesics and cooled Lidocaine with Epinephrine on the anesthetic efficacy of inferior alveolar nerve block in patients with symptomatic irreversible pulpitis: A single-blind, randomized controlled trial
Authors: Prabhu V Solomon , Borugadda Roopesh , Neelima U Lavanya , Reddy Ch Priyanka , Nuka Ashwini , Kondipudi Nimisha
Published: November 2024

Background:Treating mandibular molars with symptomatic irreversible pulpitis poses challenges, as achieving anaesthesia in “hot teeth” is difficult. Epinephrine aids anaesthesia by reducing blood absorption through local vasoconstriction. However, when epinephrine is contraindicated, cooling the anaesthetic may provide effective vasoconstriction in cutaneous arteries and inhibit sensory nerve action potentials, enhancing anaesthetic efficacy.Aim:To evaluate the effectiveness of preoperative analgesics and cooling of 2% lidocaine solution with 1:200,000 Epinephrine on the efficacy of Inferior alveolar nerve block (IANB) during root canal treatment in patients with symptomatic irreversible pulpitis of the mandibular molars.Materials and methods:This study was conducted on 36 subjects diagnosed with symptomatic irreversible pulpitis. Participants were randomly assigned into one of three groups, each consisting of 12 patients (n=12). The subjects in Group A (Control) received Vitamin E 400 mg tablets as premedication and Local Anaesthetic injection of 2% Lignocaine at room temperature. The subjects in Group B received Piroxicam 20 mg tablets as premedication and local anaesthetic injection of 2% Lignocaine at Room Temperature. The subjects in Group C received Piroxicam 20 mg tablets as premedication and local anaesthetic injection of 2% Lignocaine at 4° Celsius. The patient’s preoperative pain levels before and after administering the analgesic, before and after the administration of local anaesthesia and intraoperative pain levels were recorded using the Heft-Parker visual analogue scale. Anaesthetic success was again evaluated after re-initiation of the endodontic treatment. The heart rates of the patients were measured using a finger pulse oximeter.Results:The patients in group C showed the highest mean difference in pain levels followed by group B and A. However, the Group A patients displayed the highest heart rates followed by Groups B and C. One-way ANOVA showed a significant differences in the pain levels (p=0.0002) and heart rates (p=0.0004) among the groups.Conclusion:This study showed that Piroxicam effectively achieved IANB in patients with symptomatic irreversible pulpitis of mandibular molars. Cooling 2% lidocaine with 1:200,000 epinephrine to 4°C significantly reduced post-injection heart rate and enhanced anesthetic success.
The effect of immediate dentin sealing on the bond strength of resin composite to dentin bonded with universal bonding agent: An in vitrostudy
Authors: Meda Vineetha , Lakshmi Reddy Sampathi Naga , Reddy Upendra Natha , Kumar Neshaneni Sathish , E satyavathi Sri
Published: November 2024

Background:Dentin hypersensitivity is a common scenario encountered in dental practice. This issue can be treated by reducing dentin permeability and dentinal fluid flow. However, the desensitizing agents used may adversely affect the bonding of composite restorations to dentin.Aim:To evaluate the shear bond strength of restorative composites to dentin treated with silver diamine fluoride and self-etch bonding agent bonded using a universal bonding agent.Materials and methods:A total of 30 teeth were selected, and their occlusal surfaces were ground to expose a flat dentin surface. The teeth were then embedded in cold cure resin blocks. Depending on the treatment, the samples were randomly divided into three groups, with 10 in each. The samples in the group were untreated, in group 2 were treated with Silver Diamine Fluoride (SDF), and in group 3 with the sixth generation bonding agent (self-etch primer). After the treatment, the composite is bonded to the dentin surfaces and subjected to shear bond strength using the universal testing machine (UTM). The specimen was mounted on the custom-made jig and placed over the UTM. The load was applied at a cross-head speed of 1mm/min until debonding occurred at the dentin and composite interface, and the bond strength was computed in MPa. Overall comparisons were analyzed using the Kruskal-Wallis test. The Mann-Whitney U-test was used for pair-wise comparisons, and the significance level was set at p < 0.05.Results:The lowest bond strength was observed with the dentin surfaces treated with silver diamine fluoride (Group 2), and the highest bond strength was for dentin treated with self-etchbonding agent (Group3). Significant differences (p=0.003) were observed between the groups. In pair-wise comparisons, group 3 showed significant difference with group 1 (p=0.007) and group 2 (p=0.002). However, no significant difference was observed between groups 1 and 2 (p=0.197).Conclusion:The shear bond strength varies with different desensitizing treatments. This study reported more SBS with sixth-generation bonding agent followed by untreated dentin and SDF.
Inclusão para todos com diversidade e busca de equidade : os desafios que os países do G20 voltam a debater
Authors: Montagner Paula
Published: November 2024

Aborda as discussões sobre diversidade e equidade salarial de gênero e étnico-racial nos eventos preparatórios e presenciais do G20. Com a participação de representantes técnicos e diplomáticos de diferentes países e organizações, os debates focaram em garantir que os interesses econômicos fossem acompanhados de um compromisso real com a inclusão equitativa. A autora observa a convergência entre governos, grandes empresas e trabalhadores na inclusão das mulheres no mercado de trabalho e na redução das desigualdades salariais, destacando a importância da troca de experiências e do compromisso com a igualdade de remuneração e oportunidades.
Seguro-reemprego e qualificação profissional : uma proposta de nova modalidade de concessão do seguro-desemprego no Brasil
Authors: Magalhães Mário
Published: November 2024

Sugere a criação de uma nova modalidade de seguro-desemprego, chamada “seguro-reemprego e qualificação”. Essa proposta visa usar o pagamento do benefício como incentivo para a reintegração ao mercado de trabalho, combinando reemprego com treinamento promovido pela empresa contratante. O artigo detalha o escopo normativo da proposta e estima seus possíveis impactos.
Physical Fitness and Self-Perception in Adolescents: A Public Health Perspective
Authors: T M Rakesh
Published: November 2024

Adolescence is a critical period for physical and psychological development. The relationship between physical fitness and self-perception, particularly in the context of adolescents, has garnered significant attention due to its implications for long-term health outcomes. This article explores the intersection of physical fitness and self-perception in adolescents, emphasizing the role of physical activity in shaping self- esteem, body image, and mental health. From a public health perspective, promoting physical fitness in this age group can contribute not only to improved physical health but also to better psychological well-being. The article discusses interventions, policy initiatives, and practical recommendations to support adolescents in developing positive physical fitness habits and fostering healthy self-perception.
A Study to Determine Sleeplessness as a Potential Predisposing Factor for Myocardial Infarction
Authors: Ballurgi Amit , Burhan Mohamad , Pradhan Ramanna , Redappagari Shreya
Published: November 2024

Background It is well-established that insufficient sleep is related to more than one acute and persistent illness and leads to elevated mortality and morbidity for cardiovascular illnesses. In recent years, there has been growing interest in sleep-associated investigations. Significant interest has currently been focused on the impacts of sleep deficiency and disturbance on various organs and how they modulate an increasing listing of disease processes. This study aims to bring awareness about the importance of sleep in Myocardial Infarction patients and makes it necessary to counsel patients to change their lifestyle which could help reduce the possible morbidity and mortality rates in the population.  Methodology A prospective observational study was conducted on 400 MI patients (males and females) aged between 20- 60 years who were enrolled in Sri Jayadeva Institute of Cardiovascular Science and Research Hospital from February 2021 to April 2021 to assess sleep duration and quality in MI patients using Pittsburgh Sleep Quality Index (PSQI) scoring scale and a self-designed patient profile form.  Results It was observed that males (77%) were more prone to cardiovascular conditions due to impaired sleep as compared to females (23%) with the baseline age of 50- 60 years (46.8%) at the highest risk. Patients who were married (98.8%) and had a habit or abstinence from smoking and drinking (61.3% and 76.5% respectively), staying in urban places (63.5%), and without any significant medical history were observed to have cardiovascular diseases attributed to their poor sleep practice. Daily wagers were often sleep-deprived due to physical and financial stress which can cause high morbidity rates in the population.  Conclusion The study suggests a positive correlation between sleep deprivation and myocardial injury. Patients with impaired sleep might be at moderate risk of poor cardiac prognosis followed by a subsequent attack of MI.
Artificial Intelligence-Driven Wearable Electronics and Smart Nanodevices for Continuous Cancer Monitoring and Enhanced Diagnostic Accuracy
Authors: Adeniyi Michael , Ayoola Victoria Bukky , Samuel Temilayo Esther , Awosan Wuraola
Published: November 2024

Artificial Intelligence (AI)-driven wearable electronics and smart nanodevices are transforming cancer diagnostics by offering continuous monitoring and enhanced diagnostic accuracy. Traditional cancer diagnostic methods often suffer from delays in detection and limited real-time data, which can hinder timely treatment. In contrast, AI integration in wearable technologies and nanodevices allows for the continuous tracking of physiological biomarkers, enabling earlier detection of cancer and more precise monitoring of disease progression. This review explores the advancements in AI-powered wearable electronics and smart nanodevices for cancer diagnostics, focusing on their applications, benefits, and challenges. AI-driven wearable devices, such as smartwatches and biosensors, are equipped with machine learning algorithms capable of real-time data analysis, facilitating personalized and proactive healthcare solutions. Similarly, smart nanodevices, which leverage nanotechnology combined with AI, offer unprecedented precision in identifying and monitoring cancer cells, allowing for more accurate diagnostic outcomes. Case studies are presented to demonstrate the effectiveness of these technologies in improving diagnostic accuracy and patient outcomes. The review also highlights the challenges these technologies face, including data privacy, ethical concerns, and technical limitations. Additionally, the paper discusses future directions in AI-driven cancer diagnostics, emphasizing the potential for these innovations to revolutionize early cancer detection, improve treatment strategies, and enhance long-term patient outcomes. Ultimately, this review provides a comprehensive understanding of how AI and advanced technologies are reshaping the landscape of cancer diagnostics and monitoring, offering significant implications for clinical practice and research in the medical field.
Flipped classroom and creative learning resources for teaching history
Authors: Molina-Torres María Pilar , Pastor Blázquez María Montserrat
Published: November 2024

The study aims to analyse the perceptions and pedagogical skills of university students in the implementation of the flipped classroom in the degree of primary education. The sample consists of 209 students following the bilingual English programme at the University of Córdoba, Spain. The study is described as a non-experimental quantitative research, which means that it focuses on the collection and analysis of data without intervention or manipulation of variables. A fifteen-item Likert-type questionnaire was used to collect the data. The questionnaire appears to be on a scale of 1 to 5, where participants rate their answers according to the options given. The findings suggest that new electronic learning strategies need to be incorporated into teaching methodology. There is an emphasis on the importance of providing practical approaches to digital teaching and didactic resources. Students have shown a positive attitude towards their training needs, particularly in consolidating historical thinking and integrating active learning methods with good teaching practice.
UVIT Study of the MAgellanic Clouds (U-SMAC). II. A Far-UV Catalog of the Small Magellanic Cloud: Morphology and Kinematics of Young Stellar Population
Authors: Hota Sipra , Subramaniam Annapurni , Nayak Prasanta K. , Subramanian Smitha
Published: November 2024

The Small Magellanic Cloud (SMC) is an irregular dwarf galaxy that has recently undergone an interaction with the Large Magellanic Cloud. The young massive stars in the SMC formed in the disturbed low-metallicity environment are important targets in astrophysics. We present a catalog of ∼76,800 far-ultraviolet (FUV) sources toward the SMC detected using the Ultra Violet Imaging Telescope onboard AstroSat. We created an FUV catalog with ∼62,900 probable SMC members which predominantly comprise main-sequence, giant, and subgiant stars. We selected four young populations (Young 1, Young 2, Young 3, and Blue Loop (BL) stars) identified from the Gaia optical color–magnitude diagram to study the morphology and kinematics of the young SMC using this catalog. We detect a clumpy morphology with a broken bar, a shell-like structure, and the inner SMC Wing for the four stellar populations. The eastern region and the northeastern regions are mainly populated by Young 1, 2, and 3 stars. The central region predominantly has the Young 2 and 3 populations, whereas the SW has BL stars, and Young 2 and 3 stars. The 2D kinematic study using proper motion (PM) reveals that Young 2 and 3 populations show two kinematically distinct subpopulations with low and high PM dispersion, whereas the Young 1 and BL stars show two kinematically distinct populations with low dispersion. Our analysis points to a kinematic disturbance along the R.A. direction for stars younger than ∼150 Myr located in the eastern region, with no significant disturbance along the decl.
Starspot Coverage on Two New K-type Low-mass Eclipsing Binaries with Radius Inflation
Authors: Pan Yang , Frasca Antonio , Wang Jia-Xin , Fu Jian-Ning , Zhang Xiao-Bin
Published: November 2024

Utilizing data from the Transiting Exoplanet Survey Satellite (TESS) and LAMOST, we present a photometric and spectroscopic investigation of two new K-type low-mass eclipsing binaries, TIC 56913729 and TIC 97729372. Our analysis yields masses and radii for TIC 56913729, M
1 = 0.7822 ± 0.0054M
⊙, R
1 = 0.7891 ± 0.0021R
⊙, and M
2 = 0.7532 ± 0.0052M
⊙, R
2 = 0.7648 ± 0.0021R
⊙. For TIC 97729372, the results are M
1 = 0.6410 ± 0.0058M
⊙, R
1 = 0.6537 ± 0.0069R
⊙ and M
2 = 0.6480 ± 0.0058M
⊙, R
2 = 0.6418 ± 0.0062R
⊙. In addition, by analyzing the out-of-eclipse starspot light variations, the lower limit of starspot coverage varies in different TESS sectors from 2% to 12%. We observed a clear radius inflation in the mass–radius diagram for both stars, when plotted against PARSEC and SPOT isochrones with 1 Gyr. Yet, this apparent discrepancy disappears when the comparison is made with either an older PARSEC isochrone (12 Gyr) or a SPOT isochrone (250 Myr) with high starspot coverage (F
spot ∼ 85%), which is significantly higher than the typical starspot coverage deduced from light curves. Due to the lack of strong age constraints, we cannot firmly exclude that the observed radius inflation may be the result of a post-main-sequence evolutionary effect, although the spectral and kinematic properties of these stars are hardly compatible with 10–12 Myr old (Pop II) stars. It is more likely that the radius inflation is produced by the strong magnetic activity in these rapidly rotating stars, even if it is impossible to infer the actual total spot coverage, due to the age uncertainties.
Multiwavelength Study of Extreme High-energy Peaked BL Lac Source 1ES 0229+200 Using Ultraviolet, X-Ray, and γ-Ray Observations
Authors: Hota Jyotishree , Khatoon Rukaiya , Misra Ranjeev , Pradhan Ananta C.
Published: November 2024

We present a comprehensive analysis of the broadband spectral energy distribution (SED) of the extreme high-energy peaked BL Lac source, 1ES 0229+200. Our study utilizes near-simultaneous data collected at various epochs between 2017 September and 2021 August (MJD 58119−59365) from different instruments, including AstroSat−UVIT, Soft X-ray focusing Telescope, LAXPC, Swift−UVOT, Fermi-LAT, and MAGIC. We investigate the one-zone synchrotron and synchrotron self-Compton (SSC) model, employing diverse particle distributions such as the log parabola, broken power law, power law with a maximum electron energy γ, energy-dependent diffusion (EDD), and energy-dependent acceleration (EDA) models to fit the broadband SED of the source. Our findings indicate that both peaks in the SED are well described by the one-zone SSC model across all particle distribution models. We estimate the jet power for different particle distributions. The estimated jet power for broken power law particle distributions is found to be on the order of 1047 (1044) erg s−1 for a minimum electron energy

γ

min

∼10 (104). However, for intrinsically curved particle energy distributions (e.g., log parabola, EDD, and EDA models), the estimated jet power is ∼1044 erg s−1. The SED fitting at five epochs enables us to explore the correlation between the derived spectral parameters of various particle distribution models. Notably, the observed correlations are inconsistent with the predictions in the power-law with a maximum γ model, although the EDD and EDA models yield the correlations as expected. Moreover, the estimated physical parameter values are consistent with the model assumptions.
A Modified Initial Mass Function of the First Stars with Explodability Theory under Different Enrichment Scenarios
Authors: Jiang Ruizheng , Zhao Gang , Li Haining , Xing Qianfan
Published: November 2024

The most metal-poor stars record the earliest metal enrichment triggered by Population III stars. By comparing observed abundance patterns with theoretical yields of metal-free stars, physical properties of their first star progenitors can be inferred, including zero-age main-sequence mass and explosion energy. In this work, the initial mass distribution of the first stars is obtained from the largest analysis to date of 406 very metal-poor stars with the newest LAMOST/Subaru high-resolution spectroscopic observations. However, the mass distribution fails to be consistent with the Salpeter initial mass function, which is also reported by previous studies. Here, we modify the standard power-law function with explodability theory. The mass distribution of Population III stars could be well explained by ensuring that the initial metal enrichment originates from successful supernova explosions. Based on the modified power-law function, we suggest an extremely top-heavy or nearly flat initial mass function with a large exponent for the explosion energy. This indicates that supernova explodability should be considered in the earliest metal enrichment process in the Universe.
Estimating the Spin of MAXI J1348–630 from Intermediate and Soft States Using Insight-HXMT Data
Authors: Guan J. , Ma R. C. , Tao L. , Fabian A. C. , Tomsick J. A. , Zhang S. N. , Zhang L. , Qu J. L. , Zhang S.
Published: November 2024

We present a broadband spectral analysis of the soft-intermediate and soft states using Insight-HXMT observations of the black hole binary MAXI J1348–630 during its outburst in 2019. We employ a combination of reflection and continuum fitting methods to measure the spin of the black hole and determine a spin of a = 0.79 ± 0.13, which is consistent with most of the previous results. Additionally, we investigate some sources of systematic uncertainty that could bias the measurement. The valid spectral hardening factor can partially account for the spin evolution observed during the outburst. Other potential factors, such as assumptions about the corona’s structure and their interaction with reflected photons, can also affect the accuracy of spin measurements. Furthermore, our analysis reveals that MAXI J1348–630 exhibits a significantly high disk density (∼1022 cm−3), with a moderate iron abundance of approximately 2.5 times solar.
The Calibrations of the DAMPE γ-Ray Effective Area
Authors: Shen Zhao-Qiang , Li Wen-Hao , Duan Kai-Kai , Jiang Wei , Xu Zun-Lei , Yue Chuan , Li Xiang
Published: November 2024

The Dark Matter Particle Explorer (DAMPE) is a cosmic-ray detector as well as a pair-converting γ-ray telescope. The effective area, reflecting the geometrical cross-section area, the γ-ray conversion probability, and the photon selection efficiency, is important in γ-ray analyses. In this work, we find a significant time variation in the effective area, as large as ∼−4% yr−1 at 2 GeV for the high-energy trigger. We derive the data-based correction factors to the effective areas and apply corrections to both the effective areas and the exposure maps. The calibrated exposure can be ∼12% smaller than the Monte Carlo one on average at 2 GeV. The calibration is further verified using the observation of the Vela pulsar, showing the spectral parameters with the correction are more consistent with those in the Fermi-LAT catalog than the ones without correction. All the corrections are now implemented in the latest version of the DAMPE γ-ray analysis toolkit DmpST.
A Survey of Sulfur-bearing Molecular Lines toward the Dense Cores in 11 Massive Protoclusters
Authors: Tang Mengyao , Qin Sheng-Li , Liu Tie , Zapata Luis A. , Liu Xunchuan , Peng Yaping , Xu Fengwei , Zhang Chao , Tatematsu Ken’ichi
Published: November 2024

Sulfur-bearing molecules are commonly detected in dense cores within star-forming regions, but the total sulfur budget is significantly lower when compared to the interstellar medium value. The properties of sulfur-bearing molecules are not well understood due to the absence of large sample studies with uniform observational configurations. To deepen our understanding of this subject, we conducted a study using Atacama Large Millimeter/submillimeter Array 870 μm observations of 11 massive protoclusters. By checking the spectra of 248 dense cores in 11 massive protoclusters, a total of 10 sulfur-bearing species (CS, SO, H2CS, NS, SO2, 33SO, 34SO2, 33SO2, SO18O, and OC34S) were identified. The parameters including systemic velocities, line widths, gas temperatures, column densities, and abundances were derived. Our results indicate that SO appears to be more easily detected in a wider range of physical environments than H2CS, despite these two species showing similarities in gas distributions and abundances. Molecules 34SO2 and H2CS are good tracers of the temperature of sulfur-bearing species, in which H2CS traces the outer warm envelope and 34SO2 is associated with high-temperature central regions. High-mass star-forming feedback (outflow and other nonthermal motions) significantly elevates the sulfur-bearing molecular abundances and detection rates specifically for SO2 and SO. A positive correlation between the SO2 abundance increasing factor (F) and temperatures suggests that SO2 could serve as a sulfur reservoir on the grain mantles of dense cores and then can be desorbed from dust to gas phase as the temperature rises. This work shows the importance of a large and unbiased survey to understand the sulfur depletion in dense cores.
« Sud global », BRICS+ : deux notions vraiment géopolitiques ?
Authors: Garcin Thierry
Published: November 2024

La notion de « Sud global » a connu un rapide succès international, comme s’il s’agissait d’un mouvement de fond et d’un nouveau paradigme géopolitique, dans le triple contexte de la guerre d’Ukraine, du rapprochement russo-chinois et du renouveau des BRICS élargis. Mais comment s’inscrit-elle dans les mouvements passés de contestation de l’hégémonie américaine et de mobilisation anti-occidentale ? Est-ce un simple slogan idéologique ou en quoi est-il novateur ? Peut-il déboucher sur de nouvelles formes de multipolarités ?
Grain yield, cooking quality, and aroma of fragrant rice as affected by nitrogen source and method of application
Authors: Chakraborty Rajesh , Roy Tuhin Suvra , Sakagami Jun-Ichi
Published: November 2024

One constraint is the incapacity of existing agronomic studies on rice yield, aroma, and cooking quality to fully assess the effects of various applications and sources of nitrogen (N) fertilizer. It is challenging for us to understand how different N inputs impact rice's sensory and cooking qualities in addition to crop productivity because of this research gap. So, a two-year pot experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka, under an open field plastic net house from July 15 to December 4 in 2020 and 2021. The study used Bangladesh Rice Research Institute (BRRI) dhan70 as the test crop. The experiment examined two factors: the methods and source of N application. Three methods of N application were tested: 100% soil application (NM1), 2% foliar spray at tillering and booting stages (NM2), and a combination of 50% soil application and 2% foliar spray at the booting stage (NM3). Three sources of N were also evaluated: Urea (NS1), ammonium nitrate (NS2), and ammonium sulfate (NS3). Total 41.0 kg N ha−1 was applied considering the nitrogen content in Urea (46%), ammonium nitrate (35%), and ammonium sulfate (21%). The experiment followed a randomized complete block design (RCBD) with three replications. The results indicated that the application of N significantly influenced most of the studied parameters. The combined application of N as a foliar dose and soil application, along with ammonium nitrate and ammonium sulfate, showed improved results for various parameters such as gelatinization temperature, gel consistency, protein content, cooking time, imbibition ratio, 2-AP content, grain aroma, and taste of BRRI dhan70 compared to 100% soil application of N. The highest grain yield and 2-AP was observed in the NM3NS3 treatment (35.437 g·pot−1 and 0.137 µg·g−1, respectively) which was statistical similar with NM3NS2 treatment while the lowest yield and 2-AP was recorded in NM1NS1 (24.877 g·pot−1 and 0.076 µg·g−1, respectively).
Analytical and numerical techniques for solving a fractional integro-differential equation in complex space
Authors: Shammaky Amnah E. , Youssef Eslam M.
Published: November 2024

In this article, we describe the existence and uniqueness of a solution to the nonlinear fractional Volterra integro differential equation in complex space using the fixed-point theory. We also examine the remarkably effective Euler wavelet method, which converts the model to a matrix structure that lines up with a system of algebraic linear equations; this method then provides approximate solutions for the given problem. The proposed technique demonstrates superior accuracy in numerical solutions when compared to the Euler wavelet method. Although we provide two cases of computational methods using MATLAB R2022b, which could be the final step in confirming the theoretical investigation.
A frequency domain-based loop shaping procedure for the parameter estimation of the fractional-order tilt integral derivative controller
Authors: Dakua Biresh Kumar , Pati Bibhuti Bhusan
Published: November 2024

This paper demonstrates a frequency domain-based loop shaping method for the parameter estimation of a fractional order tilt integral derivative (FOTID) controller for the interval integer and fractional order time-delay systems. Along with the five nonlinear constraints usually considered for the design of the fractional order proportional integral derivative (FOPID) controller, a more flat phase concept signifying an enhanced robustness of the system towards gain variations is adopted as the sixth constraint for the tuning of a six variable tunable FOTID controller. The optimization toolbox fmincon in MATLAB is utilized for the solution process of the above constraint minimization problem. A certain class of fractional order plus time delay process is considered for the implementation and validation of the above procedure. The robustness of the FOTID controller optimized by the proposed method is tested against variations of the system parameters. By considering different numerical examples, the technical superiority of the FOTID controller over the FOPID controller is demonstrated through suitable comparisons in this current work.
Enseigner les langues à l'école publique au Maroc
Authors: Pellegrini Chloé
Published: November 2024

Au Maroc, les débats autour des politiques linguistiques et des langues nationales et étrangères – arabe, amazigh, français, anglais et espagnol – mobilisent des débats identitaires passionnés au nom de valeurs sociétales et civilisationnelles antagonistes, dans un contexte de tensions entre savoirs locaux et savoirs mondialisés. Cet ouvrage s’appuie sur une recherche inédite d’immersion ethnographique de longue durée à l’intérieur d’établissements scolaires publics, du primaire au lycée, en milieux urbain, rural et montagnard au Maroc. Après un état des lieux des politiques linguistiques éducatives et des débats sociétaux sur les langues, il invite le lecteur à suivre les parcours personnels et professionnels d’enseignants de langues, à observer leurs pratiques d’enseignement dans les classes et les modalités de construction des savoirs selon la langue enseignée. Dans une approche socio-anthropologique, il montre comment les idéologies linguistiques véhiculées par les programmes et les manuels y sont interprétées, et quelles formes de savoirs, d’identités et de citoyenneté sont valorisées auprès des élèves. Des pistes de réflexion sont enfin proposées pour tenter de « désidéologiser » l’enseignement des langues et d’atténuer les souffrances liées à leur apprentissage.
Monde canonial, monde monastique
Authors: Deflou-Leca Noëlle , Massoni Anne
Published: November 2024

Dans l’organisation de l’Église, séculiers et réguliers sont réputés avoir chacun leur spécificité et tenir de manière parallèle et bien distincte leur place au sein de l’Ecclesia, clercs et chanoines d’un côté, moines et moniales de l’autre. Or, dès les temps carolingiens mais plus encore aux xie-xiie siècles, poussées par leurs protecteurs, évêques ou grands laïcs, ces communautés ont parfois été amenées à changer de propositum vitae, pour passer du siècle à la règle ou, plus rarement, abandonner celle-ci pour vivre en clercs. Ces processus de régularisation ou de sécularisation entrent dans le champ des phénomènes historiques de réforme qui entraînent réticences et résistances et conditionnent la mise en œuvre de ces mutations, leur réussite ou leur échec. En abordant un champ quasiment inexploré de l’histoire religieuse médiévale, il s’agit ici de décloisonner les catégories séculiers/réguliers pour aborder autrement les pratiques de la vie communautaire médiévale et analyser les contacts entre ces deux mondes, canoniaux et monastiques.
La Mission d’exploration commerciale lyonnaise en Chine (1895-1897)
Authors: Adrover Florence
Published: November 2024

La Mission lyonnaise d’exploration commerciale en Chine constitue une initiative privée, qui contraste avec les explorations précédentes, ordonnées par l’État. Avec les promesses attendues du Traité de Shimonoseki, Lyon espère établir une « soudure commerciale » entre l’Indochine et la Chine, suivant le chef de mission Henri Brenier. Si l’enquête sur la sériciculture demeure la priorité, les objectifs englobent l’étude des différents débouchés commerciaux au Yunnan et au Sichuan. Le champ thématique et géographique de la mission est d’ampleur. Il en résulte un rapport général abondamment illustré, assez rare pour être souligné. La photographie joue en effet un rôle important dans le cadre de la mission, qui participe en cela d’un renouvellement visuel de la Chine. Cet article se propose d’étudier les apports photographiques à l’enquête économique et la manière dont elle fabrique un territoire convoité par les Occidentaux, au demeurant extérieur au joug colonial.
Temps court et temps long en histoire des mobilités
Authors: Passalacqua Arnaud
Published: November 2024

Le monde des transports et mobilité fourmille de références au temps, par les objets, par les projets et par l’expérience sensible de qui voyage. Cet article propose une réflexion sur les formes du temps à l’œuvre dans ce domaine, en identifiant les différents rythmes qui l’animent. Il étudie l’hypothèse opposant un temps court du déplacement à un temps long des projets et infrastructures. Contrairement à l’idée selon laquelle ce temps court serait répétitif et le temps long orienté vers le progrès, il propose, par le regard historique, d’inverser les points de vue : le temps cyclique serait bien celui du temps long de la répétition des projets selon un cercle du réenchantement, tandis que le temps court ferait l’objet de tentatives constantes de réduction, selon une logique orientée vers l’accélération. L’article discute de l’adéquation entre ces rythmes et ceux de la société, en débouchant sur l’idée que la patrimonialisation puisse être une voie de mise en résonance.
Transnacionalidad e intertextualidad en El cóndor de Père-Lachaise de Fernando Iwasaki
Authors: Roldán Romero Juan Luis
Published: November 2024

En la obra de Fernando Iwasaki Cauti (1961), y fruto de su experiencia vital y su erudición personal, prevalecen elementos como la influencia de Borges, reflexiones sobre la identidad, el humor o el erotismo. En los relatos de El cóndor de Père-Lachaise (2019) encontramos, además de los elementos antes mencionados, divertidos ejemplos de originalidad estilística y formal, ruptura de los cánones clásicos del género policial y un clásico juego con los estereotipos. Este artículo analiza los elementos relacionados con la transculturación, transnacionalidad e intertextualidad.
Historiografía de las teorías del cuento en Latinoamérica
Authors: Peña Bossano Santiago
Published: November 2024

Frente a los postulados de Chéjov, James y Hemingway, ciertos autores latinoamericanos han expuesto sus tesis y teorías sobre cómo escribir un cuento: Quiroga, Borges, Cortázar, Vargas Llosa, Piglia, Bolaño, Neuman. Estos han emulado a sus maestros y creado sus propios acercamientos en textos populares y en otros, menos conocidos. Este trabajo contrasta las teorías del cuento elaboradas por escritores latinoamericanos en el siglo XX frente a las teorías clásicas de Aristóteles y Edgar Allan Poe, para dejar constancia de una historiografía y propuestas de las teorías del cuento en la región.
Digital storytelling game per una didattica ludica della storia
Authors: De Marco Elisabetta
Published: November 2024

L’articolo esplora il potenziale del digital storytelling come strumento per la promozione della comprensione storica. Il digital storytelling si basa su un approccio di tipo ludico-narrativo all’apprendimento “mediato” dall’uso delle tecnologie digitali. Il gioco si concretizza in attività di “manipolazione” di conoscenze storiche e di editing di risorse digitali (suoni, immagini, video) selezionate dagli archivi web sulla base di uno storyboard digitale condiviso. Il digital storytelling game si configura come un contesto di gioco e di apprendimento finalizzato alla produzione di narrazioni digitali di tipo storico. Giocare con le conoscenze storiche rappresenta un modo efficace per apprendere la storia esplorando le potenzialità creative e ludiche delle nuove tecnologie al fine di stabilire nessi, sottoforma di narrazioni digitali, tra le conoscenze del passato, l’uso delle fonti e la consapevolezza storica.