bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigating perspectives on e-health interventions to enhance maternal mental well-being: Results of a stakeholder interview
Authors: Schmidt-Hantke Juliane , Jacobi Corinna
Published: August 2023

Peripartum mental disorders are highly prevalent conditions and associated with adverse outcomes for the mother, the infant and the whole family. Despite the high burden, help-seeking is low. E-mental health interventions could overcome help-seeking barriers and thus improve perinatal mental health. However, usage and adherence are rather low. This study aims to assess attitudes and needs of different stakeholder groups and to identify relevant topics to develop an intervention meeting the needs of pregnant and postpartum women and thus, increasing utilization and adherence. Therefore, semi-structured interviews and focus groups with pregnant women (n = 3), mothers (n = 4), women who have suffered from a postpartum mood disorder in the past (n = 5), gynaecologists (n = 5), and midwives (n = 5) were conducted. All interviews were audio-recorded, transcribed verbatim, and analyzed using a thematic analysis. Almost half of the stakeholders reported previous experiences with e-mental health services. Anonymity, flexibility, promoting help-seeking, or bridging waiting-time for treatment as usual were regarded as the main benefits. Concerns regarding the usefulness of e-mental health interventions, absence of face-to-face contact or lack of integration into routine care were considered as barriers. With regard to the desired program content, six main topics were identified: pregnancy and puerperium, peripartum mood swings and disorders, support options, self-care, partnership, and fatherhood. Regarding preferred characteristics of e-mental health programs, stakeholders mentioned customizability, individual guidance, evaluation of user-feedback and continuous adoption, as well as a responsive and user-friendly design. Overall, online interventions for perinatal mental health were mainly considered as beneficial. Stakeholders underlined the high need for education regarding the use and effectiveness of e-mental health, to overcome concerns and obstacles and improve acceptability. Furthermore, developing customizable and individually-guided interventions were considered as promising to increase utilization of and adherence to e-mental health interventions.
Stroboscopic visual training: The potential for clinical application in neurological populations
Authors: Das Julia , Walker Richard , Barry Gill , Vitório Rodrigo , Stuart Samuel , Morris Rosie
Published: August 2023

Visual problems are common in people who have neurological injury or disease, with deficits linked to postural control and gait impairment. Vision therapy could be a useful intervention for visual impairment in various neurological conditions such as stroke, head injury, or Parkinson’s disease. Stroboscopic visual training (SVT) has been shown to improve aspects of visuomotor and cognitive performance in healthy populations, but approaches vary with respect to testing protocols, populations, and outcomes. The purpose of this structured review was to examine the use of strobe glasses as a training intervention to inform the development of robust protocols for use in clinical practice. Within this review, any studies using strobe glasses as a training intervention with visual or motor performance–related outcomes was considered. PubMed, Scopus, and ProQuest databases were searched in January 2023. Two independent reviewers (JD and RM) screened articles that used strobe glasses as a training tool. A total of 33 full text articles were screened, and 15 met inclusion/exclusion criteria. Reported outcomes of SVT included improvements in short–term memory, attention, and visual response times, with emerging evidence for training effects translating to balance and physical performance. However, the lack of standardisation across studies for SVT protocols, variation in intervention settings, duration and outcomes, and the limited evidence within clinical populations demonstrates that further work is required to determine optimal strobe dosage and delivery. This review highlights the potential benefits, and existing research gaps regarding the use of SVT in clinical practice, with recommendations for clinicians considering adopting this technology as part of future studies in this emerging field.
Identifying and preventing fraudulent responses in online public health surveys: Lessons learned during the COVID-19 pandemic
Authors: Wang June , Calderon Gabriela , Hager Erin R. , Edwards Lorece V. , Berry Andrea A. , Liu Yisi , Dinh Janny , Summers August C. , Connor Katherine A. , Collins Megan E. , Prichett Laura , Marshall Beth R. , Johnson Sara B.
Published: August 2023

Web-based survey data collection has become increasingly popular, and limitations on in-person data collection during the COVID-19 pandemic have fueled this growth. However, the anonymity of the online environment increases the risk of fraudulent responses provided by bots or those who complete surveys to receive incentives, a major risk to data integrity. As part of a study of COVID-19 and the return to in-person school, we implemented a web-based survey of parents in Maryland between December 2021 and July 2022. Recruitment relied, in part, on social media advertisements. Despite implementing many existing best practices, we found the survey challenged by sophisticated fraudsters. In response, we iteratively improved survey security. In this paper, we describe efforts to identify and prevent fraudulent online survey responses. Informed by this experience, we provide specific, actionable recommendations for identifying and preventing online survey fraud in future research. Some strategies can be deployed within the data collection platform such as careful crafting of survey links, Internet Protocol address logging to identify duplicate responses, and comparison of client-side and server-side time stamps to identify responses that may have been completed by respondents outside of the survey’s target geography. Other strategies can be implemented during the survey design phase. These approaches include the use of a 2-stage design in which respondents must be eligible on a preliminary screener before receiving a personalized link. Other design-based strategies include within-survey and cross-survey validation questions, the addition of “speed bump” questions to thwart careless or computerized responders, and the use of optional open-ended survey questions to identify fraudsters. We describe best practices for ongoing monitoring and post-completion survey data review and verification, including algorithms to expedite some aspects of data review and quality assurance. Such strategies are increasingly critical to safeguarding survey-based public health research.
The clinical presentation and detection of tuberculosis during pregnancy and in the postpartum period in low- and middle-income countries: A systematic review and meta-analysis
Authors: Simpson Grace , Philip Moira , Vogel Joshua P. , Scoullar Michelle J. L. , Graham Stephen M. , Wilson Alyce N.
Published: August 2023

For women infected with Mycobacterium tuberculosis, pregnancy is associated with an increased risk of developing or worsening TB disease. TB in pregnancy increases the risk of adverse maternal and neonatal outcomes, however the detection of TB in pregnancy is challenging. We aimed to identify and summarise the findings of studies regarding the clinical presentation and diagnosis of TB during pregnancy and the postpartum period (within 6 months of birth) in low-and middle-income countries (LMICs). A systematic review was conducted searching Ovid MEDLINE, Embase, CINAHL and Global Index Medicus databases. We included any primary research study of women diagnosed with TB during pregnancy or the postpartum period in LMICs that described the clinical presentation or method of diagnosis. Meta-analysis was used to determine pooled prevalence of TB clinical features and health outcomes, as well as detection method yield. Eighty-seven studies of 2,965 women from 27 countries were included. 70.4% of women were from South Africa or India and 44.7% were known to be HIV positive. For 1,833 women where TB type was reported, pulmonary TB was most common (79.6%). Most studies did not report the prevalence of presenting clinical features. Where reported, the most common were sputum production (73%) and cough (68%). Having a recent TB contact was found in 45% of women. Only six studies screened for TB using diagnostic testing for asymptomatic antenatal women and included mainly HIV-positive women ‒ 58% of women with bacteriologically confirmed TB did not report symptoms and only two were in HIV-negative women. Chest X-ray had the highest screening yield; 60% abnormal results of 3036 women tested. Screening pregnant women for TB-related symptoms and risk factors is important but detection yields are limited. Chest radiography and bacteriological detection methods can improve this, but procedures for optimal utilisation remain uncertain in this at-risk population.

Trial registration: Prospero registration number: CRD42020202493.
Disparities, distribution, and determinants in appropriate timely initiation, number, and quality of antenatal care in Bangladesh: Evidence from Demographic and Health Survey 2017–18
Authors: Kibria Gulam Muhammed Al , Crispen Reese
Published: August 2023

Like many other low- and middle-income countries, Bangladesh experiences a disproportionately higher number of maternal and neonatal deaths compared to high-income countries. Despite this, a majority of pregnant women in Bangladesh do not receive appropriate antenatal care (ANC). We investigated the disparities, distribution, and determinants of the timing, number, and quality of ANC in this country. This cross-sectional study analyzed Bangladesh Demographic and Health Survey (BDHS) 2017–18 data on ever-married reproductive-age (i.e., 15-49-year-olds) women. After describing the study sample and proportions, multilevel logistic regression was applied to study determinants. The prevalence and odds of the studied outcomes were higher among women with higher parity, a higher education level, more highly educated husbands, urban residence, and residence in some administrative divisions (p<0.05). For instance, among women in the poorest, poorer, middle, richer, and richest wealth quintiles, the proportions of those who initiated ANC during the first trimester were 22.2% (95% confidence interval (CI): 19.6–25.0), 30.1% (95% CI: 27.1–33.2), 35.1% (95% CI: 31.7–38.6), 38.5% (95% CI: 35.2–42.0), and 61.0% (95% CI: 57.5–64.3). Then, compared to women in the poorest wealth quintile, the adjusted odds ratio (AOR) for ANC initiation was higher among those in the poorer (AOR: 1.3, 95% CI: 1.1–1.7), middle (AOR: 1.5, 95% CI: 1.2–1.9), richer (AOR: 1.4, 95% CI: 1.1–1.8), and richest (AOR: 2.7, 95% CI: 2.1–3.5) household wealth quintiles. Given the importance of appropriate ANC, it is crucial to increase awareness and coverage among women with low socioeconomic status and rural residence, among other factors studied.
How can artificial intelligence boost firms’ exports? evidence from China
Authors: Zhang Zhaozhong , Deng Fangfang
Published: August 2023

This paper explores the impact of artificial intelligence and industrial robots on firms’ export behaviour and divides the impact mechanism into the productivity effect and labour substitution effect. It examines the effect of industrial robots on firms’ export value by using Chinese Customs data, Chinese Industrial Firm data and robot data from the International Robot Federation (IRF). The main findings are as follows: Firstly, the impact of artificial intelligence and industrial robots on Chinese firms’ export value is generally negative, which means the negative labour substitution effect dominates the positive productivity effect. Secondly, the impact of artificial intelligence varies significantly by industry, and the export value of firms from high-tech industries benefits from the use of industrial robots. Thirdly, the impact of artificial intelligence on firms’ export value also varies by time; before 2003, the use of industrial robots showed mainly an inhibiting effect on firms’ exports, which turned into a driving effect thereafter, and after 2006, industrial robots began to significantly promote firms’ export. Finally, the higher the quality of export products, the more likely the use of industrial robots will be to promote firms’ export value, and the higher the capital–labour ratio is, the more likely firms’ export value will be to benefit from the use of artificial intelligence and industrial robots. On the basis of these findings, this study proposes promoting the productivity effect to dominate the labour substitution effect through technological progress and the improvement of export product quality.
Workforce diversity in specialist physicians: Implications of findings for religious affiliation in Anaesthesia & Intensive Care
Authors: Alim-Marvasti Ali , Jawad Mohammed , Ogbonnaya Chibueze , Naghieh Ali
Published: August 2023

Background

Minority ethnic identification between physician and patient can reduce communication and access barriers, improve physician-patient relationship, trust, and health outcomes. Religion influences health beliefs, behaviours, treatment decisions, and outcomes. Ethically contentious dilemmas in treatment decisions are often entangled with religious beliefs. They feature more in medical specialties such as Anaesthesia & Intensive Care, with issues including informed consent for surgery, organ donation, transplant, transfusion, and end-of-life decisions.

Methods

We investigate diversity in religious affiliation in the UK medical workforce, using data from the General Medical Council (GMC) specialist register and Health Education England (HEE) trainee applications to medical specialties. We performed conservative Bonferroni corrections for multiple comparisons using Chi-squared tests, as well as normalised mutual-information scores. Robust associations that persisted on all sensitivity analyses are reported, investigating whether ethnicity or foreign primary medical qualification could explain the underlying association.

Findings

The only significant and robust association in both GMC and HEE datasets affecting the same religious group and specialty was disproportionately fewer Anaesthesia & Intensive Care physicians with a religious affiliation of “Muslim”, both as consultants (RR 0.57[0.47,0.7]) and trainee applicants (RR 0.27[0.19,0.38]. Associations were not explained by ethnicity or foreign training. We discuss the myriad of implications of the findings for multi-cultural societies.

Conclusions

Lack of physician workforce diversity has far-reaching consequences, especially for specialties such as Anaesthesia and Intensive Care, where ethically contentious decisions could have a big impact. Religious beliefs and practices, or lack thereof, may have unmeasured influences on clinical decisions and on whether patients identify with physicians, which in turn can affect health outcomes. Examining an influencing variable such as religion in healthcare decisions should be prioritised, especially considering findings from the clinician-patient concordance literature. It is important to further explore potential historical and socio-cultural barriers to entry of training medics into under-represented specialties, such as Anaesthesia and Intensive Care.
Closed–Loop ventilation using sidestream versus mainstream capnography for automated adjustments of minute ventilation—A randomized clinical trial in cardiac surgery patients
Authors: Nijbroek Sunny G. L. H. , Roozeman Jan-Paul , Ettayeby Sarah , Rosenberg Neeltje M. , van Meenen David M. P. , Cherpanath Thomas G. V. , Lagrand Wim K. , Tepaske Robert , Klautz Robert J. M. , Serpa Neto Ary , Schultz Marcus J.
Published: August 2023

Background

INTELLiVENT–Adaptive Support Ventilation (ASV) is a closed–loop ventilation mode that uses capnography to adjust tidal volume (VT) and respiratory rate according to a user–set end–tidal CO2 (etCO2) target range. We compared sidestream versus mainstream capnography with this ventilation mode with respect to the quality of breathing in patients after cardiac surgery.

Methods

Single–center, single–blinded, non–inferiority, randomized clinical trial in adult patients scheduled for elective cardiac surgery that were expected to receive at least two hours of postoperative ventilation in the ICU. Patients were randomized 1:1 to closed–loop ventilation with sidestream or mainstream capnography. Each breath was classified into a zone based on the measured VT, maximum airway pressure, etCO2 and pulse oximetry. The primary outcome was the proportion of breaths spent in a predefined ‘optimal’ zone of ventilation during the first three hours of postoperative ventilation, with a non–inferiority margin for the difference in the proportions set at –20%. Secondary endpoints included the proportion of breaths in predefined ‘acceptable’ and ‘critical’ zones of ventilation, and the proportion of breaths with hypoxemia.

Results

Of 80 randomized subjects, 78 were included in the intention–to–treat analysis. We could not confirm the non–inferiority of closed–loop ventilation using sidestream with respect to the proportion of breaths in the ‘optimal’ zone (mean ratio 0.87 [0.77 to ∞]; P = 0.116 for non–inferiority). The proportion of breaths with hypoxemia was higher in the sidestream capnography group versus the mainstream capnography group.

Conclusions

We could not confirm that INTELLiVENT–ASV using sidestream capnography is non–inferior to INTELLiVENT–ASV using mainstream capnography with respect to the quality of breathing in subjects receiving postoperative ventilation after cardiac surgery.

Trial registration

NCT04599491 (clinicaltrials.gov).
Risk assessment for yachting tourism in China using dynamic Bayesian networks
Authors: Yao Yunhao , Zhou Xiaoxing , Parmak Merle
Published: August 2023

Scientific evaluation of yachting tourism safety risks (YTSRs) is crucial to reducing accidents in this sector. This paper is based on the data of 115 yachting tourism accidents in China’s coastal areas from 2008 to 2021. A fishbone diagram and the analytic hierarchy process (AHP) were used to identify the risk factors of yachting tourism from four aspects human, yachting, environmental, and management risk and to construct an evaluation index system. To perform dynamic evaluation, a dynamic evaluation model of YTSRs was built using dynamic Bayesian networks (DBN). The results indicate that human factors, such as the unsafe behavior of yachtsmen and tourists, are the primary risk factors; the risk is higher in summer than in winter, and the Pearl River Delta region has a greater risk of yachting tourism. It is suggested to improve the normal safety risk prevention and control system of yachting tourism, to advocate for multi-subject coordination and co-governance, and to improve the insurance service system so as to provide a guarantee for the safe and healthy development of yachting tourism in China. The findings provide theoretical and practical guidance for marine and coastal tourism safety management, as well as the prevention and control of YTSRs.
Strengthening English language undergraduates’ presentation skills: A blackboard-mediated intervention program
Authors: Algouzi Sami , Alzubi Ali Abbas Falah , Nazim Mohd
Published: August 2023

Studies and reports indicate that some graduates struggle to find jobs, in part because they lack the key presentation skills and competencies the labor market needs. Thus, this research investigated the effectiveness of a Blackboard-mediated intervention program in strengthening English as a foreign language (EFL) students’ presentation skills. The research followed a quasi-experimental (time series) design, delivering workshops on presentation skills and collecting data from the students (N = 30) using a set of instruments: a pre-and post-assessment checklist and semi-structured interviews. The results showed that the students’ presentation skills improved significantly post intervention. Also, the participants reported positive attitudes concerning the intervention. Drawing on these findings, recommendations and suggestions are presented.
Treponema pallidum promoted microglia apoptosis and prevented itself from clearing by human microglia via blocking autophagic flux
Authors: Hu Yun-Ting , Wu Kai-Xuan , Wang Xiao-Tong , Zhao Yuan-Yi , Jiang Xiao-Yong , Liu Dan , Tong Man-Li , Liu Li-Li
Published: August 2023

Treponema pallidum (Tp) has a well-known ability to evade the immune system and can cause neurosyphilis by invading the central nervous system (CNS). Microglia are resident macrophages of the CNS that are essential for host defense against pathogens, this study aims to investigate the interaction between Tp and microglia and the potential mechanism. Here, we found that Tp can exert significant toxic effects on microglia in vivo in Tg (mpeg1: EGFP) transgenic zebrafish embryos. Single-cell RNA sequencing results showed that Tp downregulated autophagy-related genes in human HMC3 microglial cells, which is negatively associated with apoptotic gene expression. Biochemical and cell biology assays further established that Tp inhibits microglial autophagy by interfering with the autophagosome-lysosome fusion process. Transcription factor EB (TFEB) is a master regulator of lysosome biogenesis, Tp activates the mechanistic target of rapamycin complex 1 (mTORC1) signaling to inhibit the nuclear translocation of TFEB, leading to decreased lysosomal biogenesis and accumulated autophagosome. Importantly, the inhibition of autophagosome formation reversed Tp-induced apoptosis and promoted microglial clearance of Tp. Taken together, these findings show that Tp blocks autophagic flux by inhibiting TFEB-mediated lysosomal biosynthesis in human microglia. Autophagosome accumulation was demonstrated to be a key mechanism underlying the effects of Tp in promoting apoptosis and preventing itself from clearing by human microglia. This study offers novel perspectives on the potential mechanism of immune evasion employed by Tp within CNS. The results not only establish the pivotal role of autophagy dysregulation in the detrimental effects of Tp on microglial cells but also bear considerable implications for the development of therapeutic strategies against Tp, specifically involving mTORC1 inhibitors and autophagosome formation inhibitors, in the context of neurosyphilis patients.
Estudio comparado de las normas y protocolos publicados en España por las comundiades autónomas tras la declaración del estado de alarma derivado de la COVID-19
Authors: Marrodán Gironés Jesús Abel , Martín Pérez Sonia , Martín Seco Paulino
Published: August 2023

La situación sobrevenida tras la declaración del estado de alarma en nuestro país ha supuesto la suspensión de la actividad presencial en los centros educativos durante el último trimestre del curso académico 2019/2020 y una nueva concepción en la organización y desarrollo de los procesos educativos durante el curso 2020/2021. Todo ello ha inducido al despliegue de normas y protocolos de actuación, tanto a nivel nacional como regional, al objeto de salvaguardar el derecho fundamental a la educación de nuestros menores en combinación con el derecho a la protección de la salud a través de las medidas preventivas que las autoridades sanitarias han adoptado para los centros educativos.Este artículo presenta los resultados obtenidos en la fase de análisis documental del proyecto de investigación desarrollado, tras la revisión de 149 normas y protocolos publicados por el Gobierno y las Administraciones educativas regionales. Se ha utilizado la técnica del análisis de variaciones a través de la búsqueda de términos clave entre los elementos de estudio, que permite establecer generalizaciones explicadas mediante interpretación de la diversidad, las cuales dan lugar a la identificación de factores clave en la mejora de los sistemas educativos relacionados con la inclusión, la calidad y la equidad.Para la sistematización del proceso de análisis se han utilizado 36 indicadores clasificados en cuatro categorías de estudio en torno a las medidas adoptadas con el alumnado, con el profesorado, curriculares y pedagógicas y, por último, organizativas. El estudio pone de manifiesto la dispersión de normativa existente en cuanto a volumen y tipo, así como la dificultad en algunos casos de acceder a los documentos. Asimismo, confirma la intensidad en el trabajo desarrollado por las Administraciones en el inicio del curso 2020/2021, no así en su desarrollo que se deja en manos de los centros educativos, frente a la falta de indicaciones en el cierre del curso 2019/2020. Entre los aspectos coincidentes, destacan la propuesta de planes de refuerzo y apoyo, la importancia de la comunicación a las familias, la disposición de recursos sin concretar, la necesidad de formación del profesorado en competencia digital, la adaptación de los documentos de los centros (planes de orientación y acción tutorial y programaciones didácticas), los criterios de evaluación y promoción, los planes de contingencia y digitalización, así como los aspectos relacionados con la nueva organización COVID. Por contraposición, no se trata de forma generalizada el absentismo, la disminución de ratios o los medios dirigidos al profesorado.
Evaluación docente con enfoque formativo: El papel del acompañamiento entre pares
Authors: De La Cruz Flores Gabriela
Published: August 2023

La evaluación docente ha formado parte de las políticas educativas en América Latina, en tanto, se aprecia su impronta en la mejora de los procesos de enseñanza y alcance en la formación continua del profesorado que, a la postre, afiance sistemas educativos que promuevan y garanticen el derecho al aprendizaje de los estudiantes. En el presente artículo, se analiza qué implica una evaluación docente con enfoque formativo y la relevancia del acompañamiento entre pares. El análisis permite identificar concordancias en los atributos de la evaluación docente formativa: orientada a la mejora, progresiva, permanente, participativa, contextual y situada. En torno al acompañamiento entre pares en la evaluación docente, se distingue su aporte al trabajo colaborativo y a la práctica reflexiva anclada al contexto donde tiene lugar la actividad docente. Finalmente, como epílogo se problematiza sobre las posibilidades de la evaluación docente formativa en el contexto de la pandemia por COVID-19 para la integración de comunidades de aprendizaje que trasciendan los espacios físicos y generen redes de colaboración entre el profesorado.
A közösségi médiakommunikáció anomáliái és beszédaktusainak torzulásai
Authors: Kegyes Erika , Hervé-Lóránth Ervin
Published: August 2023

Kutatásunkban azt vizsgáljuk meg, hogy a napjainkban „humán tartozéknak” nevezett kommunikációs eszközök miként alakítják át kommunikációs szokásainkat, s a „humán köldökzsinóron” át áradó információk, hogyan befolyásolják az ezekhez az eszközökhöz köthető érzelmeinket, illetve miként változtatják meg az információk tartalmát és szerkezetét. A digitális pragmatika elméleti keretében mutatjuk be a kommunikációs folyamatok pragmatikai szempontú változásait, a közösségi kommunikációs terekben megfigyelhető beszédaktusok struktúráinak átalakulását, az ezek hatására létrejött anomáliákat, amelyek kihatnak a társas kommunikáció közösségi platformokon zajló folyamaraira, és ezáltal az emberi kapcsolattartás szabályaira. A tanulmányban a következő folyamatokra fókuszálunk: az információ deformálódásának folyamatára, a közlő szándéka és a befogadó értelmezése között feszülő ellentétre, a torzult információ és torzított interpretáció következményeire. Azért, hogy ezeket a folyamatokat jobban megismerjük, fiatal felnőttek körében pilotkutatást végeztünk, amelyben az ezekhez a jelenségekhez való viszonyulásukat térképeztük fel. A kutatás eredményeit beépítettük a tanulmányunkba, és ezek alapján készítettünk el egy folyamatábrát, ami a közösségi platformok kommunikációs szokásainak negatív irányba történő elmozdulását ábrázolja.
An Interview With Isaac Goldberg, the First Hebraic Cataloger at the Library of Congress
Authors: Pearlstein Peggy K.
Published: August 2023

Isaac Goldberg, a graduate of Yeshiva Col­lege and its Teachers Institute, holds an M.S. degree in Library Science from Pratt Institute in New York. He worked for many years in Judaica and other types of librar­ies: as a cataloger at Yeshiva University, the United States Geological Survey, the Library of Congress (LC), and the Univer­sity of California at Los Angeles (UCLA); as Administrative Secretary of the Hebrew Union College Library in Cincinnati; as Ac­quisitions Librarian in the Engineering and Mathematical Sciences Library at UCLA; and as Director of Libraries of Bar llan Uni­versity (Ramat Gan, Israel).
Effectiveness of polyethylene glycol-coated silica on ions adsorption in industrial wastewater
Authors: Maryudi Maryudi , Rahayu Aster , Hakika Dhias Cahya
Published: August 2023

The effect of coating silica with polyethylene glycol on the adsorption of iron and phosphate ions in industrial wastewater was investigated. Variable factors were temperature and time of coating, PEG concentration, and PEG to silica ratio. Infrared spectroscopy and scanning electron microscopy were used to evaluate the chemical structure and morphology of PEG-coated silica. Optimum iron and phosphate ions removal efficiency was obtained using a coating temperature of 50°C, a coating time of 15 min, a PEG concentration of 20%, and a PEG to silica ratio of 1:3.
Modification of photosensitive resin with fumed silica
Authors: Zhao Jie , Song Tao , Chu Wei , Wang Yingying , Bi Lunan , Han Zhuoqun , Li Ling
Published: August 2023

The effect of fumed silica (3 and 5 wt%) on the structure, viscosity, tensile and flexural properties, and hardness of photosensitive acrylic resins used for 3D printing was investigated. The optimal set of functional properties was obtained with a silica content of 3 wt%. In this case, the resin had the appropriate viscosity, degree of cross-linking, hardness (90 ShD), tensile strength (47 MPa) and flexural strength (96 MPa). The obtained results indicate that the addition of silica effectively reinforce the resin.
Synthesis of hydrogel nanocomposites and their application in removing dyes and impurities
Authors: Ebrahimi Rajabali , Taherkhani Mahboubeh
Published: August 2023

Polyacrylate hydrogels containing starch, ZeSe and Fe3O4 nanoparticles were obtained. The polymerization process was carried out in an ultrasonic field. The structure (SEM, FTIR), swelling properties and the ability of hydrogels to adsorb dyes (methylene blue, methyl orange, methyl red and Eriochrome black T) and heavy metals (Cu2+) from wastewater were investigated. Hydrogels containing AgCl nanoparticles were also obtained.
Educação algébrica: uso de padrões figurativo-numéricos como recurso didático-pedagógico para os anos finais do ensino fundamental
Authors: Cabral dos Reis Júlio Paulo , Campos da Silva Révero , Mendes Tomaz dos Santos Guilherme
Published: August 2023

O processo de ensino-aprendizagem de matemática nos anos finais do ensino fundamental é marcado por um histórico de dificuldades. No que tange à educação algébrica, questões relacionadas à interpretação e entendimento da linguagem algébrica são desafios vivenciados durante o processo de escolarização dos estudantes. Neste sentido, este artigo teve por objetivo analisar contribuições da utilização de padrões figurativo-numéricos no segundo ciclo do ensino fundamental. Para tanto, pautados na abordagem qualitativa e na pesquisa bibliográfica, buscamos por estas contribuições, evidenciar diferentes possibilidades de intervenção pedagógica em situações didáticas adversas. Como conclusões, defendemos que a utilização do padrão figurativo-numérico nesta etapa educativa possui potencialidades importantes para a educação algébrica, visando melhor compreensão do corpo discente no que se refere a linguagem algébrica e a representação algébrica de padrões matemáticos ao longo do seu processo de escolarização. Por meio de atividades utilizando tais padrões, revelamos que pode ser possível o resgate de dificuldades matemáticas provenientes de etapas pregressas, uma vez que é possível interligar uma multiplicidade de conteúdos e conceitos, bem como áreas de conhecimento. Desta forma, entendemos que tais ações podem, por sua vez, qualificar a díade ensino-aprendizagem de álgebra na educação básica e, em especial, nos anos finais do ensino fundamental.
A teoria algébrica de formas quadráticas aplicada a uma disputa entre dois orixás
Authors: Roberto Kaique Matias de Andrade , Luiz Mariano Hugo
Published: August 2023

Esta é uma pequena introdução lúdica à Teoria Algébrica de Formas Quadráticas, como apresentada em [1], e intermediada por fábulas ou anedotas do Candomblé brasileiro contadas em [2], no intuito de expor e fortalecer a Teoria de Formas Quadráticas perante a comunidade brasileira, dado que esta é uma teoria abrangente dentro da matemática (por exemplo, com conexões em teoria dos números e geometria algébrica real), e com importantes contribuições dadas por matemáticos latino-americanos, como por exemplo, as contribuições dos professores F. Miraglia e M. Dickmann nos artigos [3] e [4], e a contribuição do professor M. Spira no artigo [5]. O texto se concentra em apresentar os conceitos iniciais da teoria, como forma quadrática, espaços quadráticos, elementos representados por uma forma, discriminante, hiperbolicidade, anisotropia e diagonalização de formas. Após isso é apresentada uma fábula (inspirada pelo estilo de R. Smullyan em [6], e pelos jogos topológicos) envolvendo uma disputa entre Orixás solucionada através de um jogo que utiliza elementos da aritmética de formas quadráticas, como forma lúdica de envolver/interessar o leitor na bela teoria de formas quadráticas através de elementos da cultura afro-brasileira.
Os números Híbridos de K-Leonardo
Authors: Mangueira Milena Carolina dos Santos , Alves Francisco Régis Vieira , Catarino Paula Maria Machado Cruz
Published: August 2023

Este trabalho apresenta um estudo sobre os números k-híbridos de Leonardo, a partir dos resultados obtidos sobre a sequência de Leonardo apresentado a princípio por Catarino e Borges (2019) e sobre o conjunto dos números híbridos, apresentado inicialmente por Özdemir (2018). De início, definiremos a k-sequência de Leonardo, sua recorrência e seus termos iniciais, e ainda, definiremos o conjunto dos números híbridos e propriedades inerentes a esses números. Com isso, ao longo do texto discutiremos a hibridização da k-sequência de Leonardo, que consiste em associar o conjunto dos números híbridos à k-sequência de Leonardo. Desse modo, apresentaremos uma nova recorrência, seus termos iniciais, sua extensão para os termos de índices não positivos, polinômio característico, forma matricial, função geradora, fórmula de Binet e propriedades vinculadas aos k-híbridos de Leonardo. Este trabalho tem o intuito de estudar e explorar a sequência de Leonardo e apresentar novos resultados matemáticos vinculados a esta sequência.
Matrizes e partições de inteiros
Authors: Christ Igor Vallis , Martins Victor
Published: August 2023

Apresentamos, neste trabalho, um estudo sobre as novas representações matriciais de partições introduzidas em 2011, ferramenta promissora dentro da teoria das partições de inteiros. Todas as representações discutidas aqui consistem de matrizes de duas linhas, porém variam quanto as suas condições definidoras. Trazemos exemplos de representações para partições irrestritas e algumas com restrições, em particular as partições que compõem a primeira e a segunda identidade de Rogers-Ramanujan. Buscamos evidenciar algumas das principais utilidades das representações matricias na teoria e passos seguintes que podem ser dados em trabalhos futuros sobre o tema. Finalizamos com resultados sobre representações matriciais relacionadas a Identidade de Schur.
Aspectos do Percurso Formativo de Residentes do Curso de Licenciatura Integrada
Authors: Miranda Benozil Ferreira , Marques Valéria Risuenho
Published: August 2023

Este estudo integra o projeto de pesquisa intitulado "Programa Residência Pedagógica: aspectos do percurso formativo de residentes" e tem como objetivo evidenciar em que aspectos o Programa Residência Pedagógica contribuiu para a formação inicial de licenciandos do curso de Licenciatura Integrada em Ciências, Matemática e Linguagens da Universidade Federal do Pará. Teoricamente, fundamentam esse estudo aspectos dos saberes da docência, profissionalização docente, formação docente na perspectiva crítico-reflexivo, professor reflexivo, relação teoria e prática, dentre outros estudos. Metodologicamente, trata-se de uma pesquisa de abordagem qualitativa, tendo como estratégia de constituição dos dados empíricos, o levantamento de produção dos residentes. Das análises dessas produções foi possível perceber que o envolvimento desse residentes nas ações do Programa, evidenciando ricas experiências por maior imersão em sala de aula, pela observância de como se dá o processo de aprendizagem, pela troca e partilha de conhecimentos em que teoria e pratica estiveram imbricadas, em momentos de regências e nas confecções de materiais didáticos, na organização e desenvolvimento de planos de aulas. Nesse sentido, consideramos que o Programa Residência Pedagógica trouxe qualificadores ao percurso formativo de residentes.
Construções geométricas com Origami e a teoria de Galois
Authors: Borges dos Santos Patrícia
Published: August 2023

A surpreendente conexão entre construções geométricas feitas com Origami e a Teoria de Galois será explorada. Assim como as construções clássicas, as construções com Origami possuem uma interpretação algébrica por meio da Teoria de Galois, e em ambos contextos ela se mostra uma poderosa ferramenta geométrica. Neste sentido será necessário assimilar alguns dos conceitos básicos da Teoria de Galois, além das construções geométricas feitas com régua e compasso para, posteriormente, analisar e compreender como as construções geométricas feitas com Origami resolvem alguns dos problemas clássicos da geometria que são insolúveis via régua e compasso. Além disso, foi também objetivo deste texto introduzir a teoria de Galois da maneira mais acessível possível para um público de graduação.
Expansão da fronteira agrária extrativa e suas implicações para a agricultura familiar camponesa no Planalto Santareno – Pará
Authors: Sousa Bianca Larissa de Mesquita , Sauer Sérgio
Published: August 2023

Território dentro dos municípios de Santarém, Belterra e Mojuí dos Campos, Oeste do Pará, o Planalto Santareno concentra diferentes agriculturas familiares camponesas. É também espaço de expansão da fronteira agrária extrativa e epicentro de monocultivos, incentivados por investimentos privados e públicos, provocando profundas mudanças socioprodutivas. A expansão das lavouras de soja tem provocado transformações no espaço, reprodução social e sistemas produtivos dos agricultores familiares camponeses. Este estudo tem como objetivo investigar os principais desafios e analisar perspectivas (re)produtivas e sociais da agricultura familiar camponesa no Planalto, considerando ameaças e consequências da fronteira extrativa agrária. A pesquisa de campo utilizou metodologias qualitativas (entrevistas e observação participante) e quantitativas (geoprocessamento e levantamento de dados de produção), sistematizando informações e relatos sobre perda de produção, aumento do desmatamento e contaminação por agrotóxicos, resultando em problemas de saúde, inviabilizando a permanência na terra e a reprodução familiar camponesa no Planalto Santareno.
Reporte de caso: Diagnóstico y resolución de absceso hepático en neonato
Authors: Heredia Rodríguez Jonnathan Alfredo , Merchán Astudillo Karina Alexandra , Vélez Paltín Vicente Leonardo , Sinchi Valladarez Carmen Liliana
Published: August 2023

BACKGROUND: Hepatic abscesses in the neonatal age can be caused by multiple etiologies and their variability in clinical presentation makes their diagnosis difficult. The incidence of infectious liver abscesses is low, however, their mortality is high and their timely diagnosis and early resolution are essential to improve prognosis and life expectancy, since therapeutic management is the cause of prolonged hospitalization due to the administration of long-lasting intravenous antimicrobials. The following is a case report of a neonatal patient with this pathology. CLINICAL REPORT: neonatal patient born by cesarean section, 38 weeks of gestation, male, admitted to the neonatology department due to the need for mechanical ventilation; with umbilical catheters for 72 hours. At 48 hours of life, he presented febrile peaks and elevation of acute phase reactants, later, abdominal distension, feeding intolerance and hepatomegaly, so antibiotic therapy was administered with suspicion of septic ileus. Due to persistent hepatomegaly, an abdominal ultrasound was performed in which cystic images were observed at the hepatic level. EVOLUTION: after the diagnosis of liver abscesses, it was decided to maintain antibiotic therapy with Meropenem and Vancomycin. Due to persistence of the abscesses despite treatment, surgical drainage was required on two occasions, the first at day 30 of life, and the second at 47 days of life. The newborn received, from the onset of symptoms and clinical symptoms, a total of 60 days of Meropenem and 48 days of Vancomycin, with complete resolution of the lesions after 68 days of hospitalization. CONCLUSION: Hepatic abscesses are rare in the neonatal age, of bacterial origin in most cases, related to hematic propagation due to umbilical catheterization. The pathology involves long hospitalizations and long-term antibiotic therapy; however, its prognosis is good with early diagnosis and timely treatment.
Application of adaptive improved DE algorithm based on multi-angle search rotation crossover strategy in multi-circuit testing optimization
Authors: Wu Wenchang
Published: August 2023

This study based on the standard differential evolution (DE) algorithm was carried out to address the issues of control parameter imprinting, mutation process, and crossover process in the standard DE algorithm as well as the issue of multidimensional circuit testing optimization. A rotation control vector was introduced to expand the search range in the poor strategy to the circumference range of the individual and the parent target individual, and a rotation crossover operator and a binomial poor operator were combined. Finally, an improved adaptive DE algorithm based on a multi-angle search rotation crossover strategy was obtained. The research will improve the DE algorithm to optimize the testing of multidimensional circuits. It can be noted that the improved average precision value is 0.9919 when comparing the precision recall curves of the DE algorithm before and after the change, demonstrating a significant improvement in accuracy and stability. The fitness difference of the 30-dimensional problem is discovered to be between 0.25 × 103 and 0.5 × 103 by comparing the box graphs of the 30-dimensional problem with that of the 50-dimensional problem. On the 50-dimensional problem, when calculating the F4–F10 function, the fitness difference of the improved DE algorithm is 0.2 × 104–0.4 × 104. In summary, the improved DE algorithm proposed in this study compensates for the shortcomings of traditional algorithms in complex problem calculations and has also achieved significant optimization results in multidimensional circuit testing.
A review of interpersonal metafunction studies in systemic functional linguistics (2012–2022)
Authors: Cheng Shi
Published: August 2023

Substantial research has drawn upon the notion of interpersonal metafunction proposed by Systemic Functional Linguistics (SFL) to approach the interpersonal meanings construed in different contexts. However, there is a lack of review on the recent research of this domain. The objective of this paper is to survey the patterns and trends of literature on interpersonal metafunction in SFL tradition and guide future research. This paper reviews 160 studies published from 2012 to 2022. Four themes emerge from the review: theoretical explorations, multilingual studies, discourse analysis, and language education. These contributions shed light on the applicability and flexibility of SFL as a theoretical tool across a wide range of genres and languages. The four streams of research are guided by the fundamental concepts of SFL and interrelated by the concept of context and the tenet of language as social semiotic. Future directions lie in theoretical model refinement, methodological developments, typological descriptions of interpersonal grammar, and the extension of application areas.
A magyar társasági jog modernizálása az 1930. évi V. törvénycikkben különös tekintettel a korlátolt felelősségű társaságokra
Authors: Ferencz Barnabás
Published: August 2023

Ödön Kuncz’s proposal was adopted by the Hungarian Parliament in the form of Act V of 1930, as the reception of the limited liability company into Hungarian company law. The concept of Kuncz was based on criticism of the earlier bills of Dávid Pap and Géza Bozóky, and the experiences of jurisdictions that had already been adopted the German GmbH model, and it was in line with the needs of domestic business practice. This study analyses the reception of legal institution of limited liability company into Hungarian law and its medium-term effects based on the concept drawn up by Kuncz.
Presencia de actividad alfa y beta total en descargas de agua en el Río Santa Catarina en Monterrey, Nuevo León, México
Authors: Villalba María de Lourdes , Colmenero Sujo Luis Humberto , Rubio Arias Héctor Osbaldo , Ochoa Rivero Jesús Manuel
Published: August 2023

Los isótopos radiactivos son utilizados en diversos procesos, como en tratamientos médicos nucleares. Después de su uso, dichos isótopos pueden ser descargados en las aguas residuales, ocasionando problemas ambientales y de salud humana. El objetivo de este trabajo fue identificar la presencia de emisiones alfa y beta totales en el río Santa Catarina, Monterrey, Nuevo León, México, como referencia para conocer si existe riesgo para la salud de la población debido a estas descargas de radionúclidos en el agua residual. Se recolectaron muestras puntuales por conveniencia en seis sitios de descarga de agua durante la época de invierno y verano y se trasladaron al Laboratorio ABC para su análisis. Las emisiones alfa y beta variaron conforme a la estación del año, encontrándose concentraciones más altas en verano tanto de alfas como betas de 0.551 Bq/l y 0.842 Bq/l, respectivamente. Ningún valor superó los límites permitidos por la normatividad mexicana para elementos radiactivos, por lo que no representan un riesgo para la salud.