bluuebunny/crossref_metadata_2025 huggingface dataset:
Modelagem Estocástica de Séries Temporais Pluviométricas e Fluviométrica da Bacia Hidrográfica do Rio Preto, Sudeste do Brasil
Authors: Barbosa Mateus Henrique , Carvalho Marcela de Marilac , Sáfadi Thelma , Oliveira Luiz Fernando Coutinho de
Published: January 2025

Resumo O presente trabalho objetivou obter um modelo para as séries temporais de vazão e precipitação, do grupo SARIMA, de dados observados em cinco estações pluviométricas e em uma estação fluviométrica, presentes na Bacia Hidrográfica do Rio Preto (BHRP), a fim de selecionar o melhor modelo que represente seu caráter preditivo. O modelo selecionado para os dados de precipitação total mensal (PTM), considerando os critérios de seleção de Akaike, Schwarz e Hannan e Quinn, foi o SARIMA (0,0,0)x(0,1,1), e o modelo selecionado para os dados de vazão mensal foi o SARIMA (1,0,0)x(0,1,1). Os modelos do tipo SARIMA demonstram boa capacidade em modelar e prever os dados de precipitação e vazão de uma bacia hidrográfica com relevo e sistemas atmosféricos heterogêneos. Esses modelos foram capazes de incorporar as características, como a sazonalidade e a correlação serial, e demonstraram bons ajustes aos dados, qualificando-os para a realização de previsões de longo termo, que foram feitas em um horizonte de 84 meses.
EDTA and citric acid on the growth of sunflower (Helianthus annuus L.) under chromium stress: a meta-analysis
Authors: Wang Wenjun , Huang Xutang , Zhou Fei , Ma Jun , Wang Jing , Guo Zhenhua
Published: January 2025

ABSTRACT: Human mining contributes to increasing the release of chromium (Cr) into the environment. For the phytoremediation of soil with high Cr content, sunflower is the right choice because the Cr in its seeds can be removed during the production of sunflower seed oil. However, the high content of Cr in the soil will inhibit the growth of sunflower, so the soil remediation agents commonly used with sunflower planting are ethylene diamine tetraacetic acid (EDTA) and citric acid (CA). This study conducted a meta-analysis on the effects of EDTA and CA on the development of sunflower under Cr stress. It will provide a reference for sunflower to improve Cr-contaminated soil or a reference to produce crops in Cr-polluted cultivated areas. A total of 97 articles were found, and 7 studies were used in this meta-analysis from January 1990 to January 2022. The results showed that EDTA treatment had no effect on the leaf weight, shoot weight and root weight. CA treatment had a positive effect on the leaf weight, shoot weight and root weight. EDTA and CA increased the Cr concentration in the root, leaf and shoot. This study recommends the addition of any chelating agent or activator, but the content of toxic metals in the soil must first be measured carefully. Unfortunately, in this study, we did not obtain a reference dose, and future research should focus on this problem.
Pre-emergent herbicides during the off-season of irrigated rice to control weedy rice and reduce the soil seed bank
Authors: Lucas Tilio Adan , Puntel Simone , Mario Rafaella Boemo , Bolson Leonardo da Silva , Corrêa Arícia Ritter , Folharini Pedro Henrique , Loro Murilo Vieira , Ulguim André da Rosa
Published: January 2025

ABSTRACT: Weedy rice (Oryza sativa L.) is the most important weed in irrigated rice cultivation, being one of the main factors limiting cereal productivity in Rio Grande do Sul (RS). Thus, this study determined the effect of pre-emergent herbicide use in autumnal management on the control and reduction of the weedy rice seed bank. Field experiments were conducted in a randomized complete block design with four replications in a commercial rice production area in the 2021/22 and 2022/23 growing seasons in Dom Pedrito (RS). The scheme used was factorial, with factor A consisting of different herbicide application times, namely June, July, and August, and corresponding to 100, 78, and 26 days and 42, 26, and 10 days before rice sowing for the agricultural years 2021/22 and 2022/23, respectively. Factor B consisted of the application of the herbicides s-metolachlor (1440 g a.i. ha-1), sulfentrazone + diuron (210 and 420 g a.i. ha-1), piroxasulfone (170 g a.i. ha-1), and flumioxazin (50 g a.i. ha-1), in addition to the control (no application). The evaluated variables were control (%), number of plants (m-2) at crop pre-harvest, number of full, viable, and non-viable wild rice seeds m-2 in the soil, crop injury (%), and grain yield (kg ha-1). The herbicides showed control values below 25% and low reduction of the seed bank in the soil, being considered ineffective in this application modality. The herbicides s-metolachlor, sulfentrazone + diuron, and flumioxazin exhibited the highest injury values; however, they did not significantly affect crop productivity. Thus, when applied before rice sowing, the herbicides s-metolachlor, sulfentrazone + diuron, pyroxasulfone, and flumioxazin did not provided satisfactory control and do not significantly reduce the wild rice seed bank.
Mechanical characterization of bamboo-reinforced polymer composites: a comparative study of epoxy and polyurethane matrices
Authors: Arumugam Mathivanan , Devarajan Kumar , Periyathambi Vasanthkumar , Dhairiyasamy Ratchagaraja
Published: January 2025

ABSTRACT The increasing demand for sustainable materials has sparked growing interest in natural fiber composites, such as bamboo-reinforced polymers, due to their renewability, cost-effectiveness, and favorable mechanical properties. This study evaluates the mechanical performance of bamboo-reinforced composites fabricated using epoxy and polyurethane matrices, highlighting their potential as eco-friendly alternatives to synthetic composites. Bamboo's high strength-to-weight ratio and compatibility with polymer matrices make it a promising reinforcement material for structural applications. Experimental results showed significant improvements in tensile and flexural properties. Unidirectional bamboo-epoxy composites achieved a tensile strength of 125 MPa, a 25-fold increase compared to the pure epoxy matrix (5 MPa). The modulus of elasticity also increased from 20 MPa for pure polyurethane to 4,020 MPa in unidirectional bamboo-polyurethane composites. Flexural strength improved markedly, with unidirectional bamboo-epoxy composites reaching 80 MPa compared to 6 MPa for the pure matrix. Microstructural analysis indicated enhanced fiber-matrix adhesion and optimized fiber orientation as key factors contributing to the improved performance, while voids and fiber pull-out limited further enhancements. These findings demonstrate bamboo composites' viability as sustainable materials with competitive mechanical properties. This study lays the groundwork for future optimization and broader industrial adoption of bamboo-reinforced composites.
Influence of nano-TiO2 additives in sealing materials on the airtightness of methane drainage boreholes in coal mines
Authors: Sun Zhenping
Published: January 2025

ABSTRACT This study explores the impact of nano-TiO2 additives on sealing materials for methane drainage boreholes in coal mines. Varying nano-TiO2 contents (0.5%, 1.0%, 1.5%, and 2.0%) were investigated, with 1.5% emerging as the optimal dosage. At this concentration, early-age strength increased by 28.6% at 3 days, while gas permeability decreased by 77.6% compared to the control mixture. The modified sealant exhibited accelerated setting, with initial setting time reduced from 195 to 152 minutes. Fluidity decreased with increasing nano-TiO2 content, necessitating superplasticizer adjustment. Microstructural analysis revealed a 34.2% reduction in total porosity and a refined pore structure. The enhanced performance is attributed to the nanoparticles’ nucleation effect, pore-filling capacity, and participation in pozzolanic reactions. These findings suggest that nano-TiO2-modified sealing materials can significantly improve methane drainage efficiency and mine safety by enhancing borehole airtightness. The study provides valuable insights for developing advanced sealing materials tailored for coal mine applications.
Eco-friendly paver blocks: repurposing plastic waste and foundry sand
Authors: Rajan Mohan Raj Robin , Rajalinggam Dharmaraj , Narayanan Karuppasamy , Ramasamy Saravanan
Published: January 2025

ABSTRACT This study investigates the use of waste plastic (polyethylene and polypropylene) and foundry sand to manufacture eco-friendly paver blocks, providing a sustainable alternative to conventional materials. The project aims to address the challenges of plastic waste disposal and environmental damage caused by sand mining. Twelve paver block samples were prepared with varying proportions of plastic (30%–60%) and foundry sand, with or without coarse aggregate. The mechanical properties, including compressive strength, flexural strength, water absorption, and fire resistance, were tested following ASTM standards. The optimal mix, FPA-2 (40% plastic, 40% foundry sand, 20% coarse aggregate), exhibited a compressive strength of 27 N/mm2 and a flexural strength of 6.7 N/mm2, comparable to traditional paver blocks. Water absorption rates were below 7%, and the blocks met fire resistance criteria. Cost analysis revealed that plastic-based paver blocks are up to 25% cheaper than conventional ones, enhancing their economic feasibility. By repurposing waste materials, this study offers a sustainable solution for reducing natural resource dependency and mitigating environmental harm. The findings highlight the potential for plastic-based paver blocks to promote circular economy practices, maintain performance standards, and provide cost-effective alternatives for the construction industry.
Lipedema: exploring pathophysiology and treatment strategies – state of the art
Authors: Kamamoto Fabio , Baiocchi Jaqueline Munaretto Timm , Batista Bernardo Nogueira , Ribeiro Renan Diego Américo , Modena Débora Aparecida Oliveira , Gornati Vitor Cervantes
Published: January 2025

Abstract Lipedema is characterized by abnormal fat deposition in areas such as the arms, hips, buttocks, and thighs, sparing the hands and feet. Symptoms include pain, bruising, edema, and subcutaneous nodules, which resist traditional interventions such as diet and exercise. Despite increasing recognition, comprehensive understanding, including pathophysiological, clinical, and therapeutic aspects, has not been fully achieved. This review aims to fill gaps in knowledge of this field, to support more informed management of lipedema. This narrative review provides a deeper understanding of lipedema treatment, addressing pathophysiology and therapeutic options. The data reveal advances in knowledge, especially regarding conservative and surgical treatments, focusing on improving quality of life. However, scientific evidence supporting the safety and efficacy of various treatments is lacking. Additional research is needed to ensure safety and to enhance efficacy of management of this complex condition.
Truncated SPAG9 as a novel candidate gene for a new syndrome: Coarse facial features, albinism, cataract and developmental delay (CACD syndrome)
Authors: Alfadhel Majid , Alhubayshi Bashayr S. , Umair Muhammad , Alfaidi Ahmed , Alwadaani Deemah , Aloyouni Essra , Abbas Safdar , Abdulrahman Abdulkareem Al , Aldrees Mohammed , Tuwaijri Abeer Al , Alharithy Ruaa S. , Alajlan Abdulaziz , Alswaid Abdulrahman , Almohrij Saad , Al-Khenaizan Sultan
Published: January 2025

Abstract Sperm-associated antigen 9 (SPAG9) is a member of cancer-testis antigen, having characteristics of a scaffold protein, which is involved in the c-Jun N-terminal kinase JNK signaling pathway, suggesting its key involvement in different physiological processes, such as survival, apoptosis, tumorigenesis, and cell proliferation. We identified two families (A and B) having multisystem features like coarse facial features, albinism, cataracts, skeletal abnormalities, and developmental delay. Whole genome sequencing (WGS) in families A and B revealed a homozygous frameshift variant (c.903del; p.Phe301Leufs*2) in the SPAG9 gene. Sanger sequencing of both families revealed perfect segregation of the identified variant in all family members. 3D protein modeling revealed substantial changes in the protein’s secondary structure. Furthermore, RT-qPCR revealed a substantial reduction of SPAG9 gene expression at the mRNA level in the affected individuals of both families, thus supporting the pathogenic nature of the identified variant. For the first time in the literature, biallelic SPAG9 gene variation was linked to multisystem-exhibiting features like coarse facial features, albinism, cataracts, skeletal abnormalities, and developmental delay. Thus, this data supports the notion that SPAG9 plays an important role in a multisystemic disorder in humans.
Comparative analysis of Khatchatourian and Darcy-Forchheimer models for aeration in soybean silos
Authors: Binelo Manuel O. , Binelo Marcia de F. B. , Silva José A. G. da , Fernandes Vanessa R. , Souza Kael B. e
Published: January 2025

ABSTRACT The primary method for managing grain moisture and temperature in silos is through the aeration process. Ensuring uniform airflow in this process is essential for preserving the quality of the stored product. Mathematical modeling and computer simulation are important for optimizing the design of these systems. The objective of this study was to make a comparative analysis between the Khatchatourian model and the Darcy-Forchheimer model to identify the feasibility of using the Darcy-Forchheimer model for simulating airflow in soybean silos. Simulations were performed using the two models for the same silo. The Darcy-Forchheimer model adequately simulated the experimental data, but for simulations within the domain of a silo, the Khatchatourian model exhibited a more realistic result. The effect of grain compaction should be considered for the application of the Darcy-Forchheimer model, as parameters D and F depend on the height of the product layer. Boundary conditions should be considered constant pressure rather than constant flow.
Water status, cell integrity, and growth of cowpea plants under water restriction and salicylic acid
Authors: Cavalcante Igor E. , Alencar Rayanne S. de , Dias Guilherme F. , Ribeiro Letícia D. , Melo Yuri L. , Ferraz Rener L. de S. , Costa Patricia S. , Viégas Pedro R. A. , Almeida Hermes A. de , Lacerda Claudivan F. de , Melo Alberto S. de
Published: January 2025

ABSTRACT The effects of water restriction on cowpea can be reversed by the use of eliciting substances such as salicylic acid (SA). Thus, the objective was to evaluate the water status, cellular integrity and growth of cowpea cultivars under water restriction and spraying with salicylic acid in the field. Four cowpea cultivars (BRS Novaera, BRS Tapaihum, BRS Pujante and BRS Pajeu) were subjected to two irrigation levels (water restriction with 50% replacement of water lost through crop evapotranspiration - ETc and control with 100% replacement of ETc) and three concentrations of SA (0, 276 and 552 mg L-1 of SA), combined in a 4 × 2 × 3 factorial scheme, with three replicates, arranged in a randomized block design. Relative leaf water content (RWC), intracellular electrolyte leakage (IEL), total fresh mass (TFM) and shoot relative growth rate (SRGR) were evaluated at phenological stages V7 and R2. Water restriction reduced RWC, TFM and SRGR and increased IEL, while spraying with 276 mg L-1 of SA reduced IEL and increased RWC, TFM and SRGR of cowpea cultivars under water restriction, responses that vary according to the cultivar and phenological stage. The cultivar BRS Novaera was more responsive to the application of SA at the V7 stage.
Use of industrial pulp and paper waste as agricultural inputs: A systematic literature review
Authors: Justo Larissa F. , Faria Luiz C. de
Published: January 2025

ABSTRACT Industrial waste disposal in landfills is a challenge for the pulp and paper industry, and its use as fertilizers and soil conditioners has exhibited potential as a new alternative destination. As such, the present study aimed to identify factors that affect this alternative use for these residues and validate its technical, legal and economic feasibility through a systematic literature review based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocol. In general, applying wastewater treatment plant sludge, green liquor dregs and biomass ashes in the field has been shown to increase soil fertility, control its acidity, and maintain toxic metal content within the recommended limits. This enables the environmental leveraging of the pulp and paper sector by providing an appropriate alternative destination for industrial waste and promotes circularity in forest and agricultural management. However, no conclusive studies on the economic aspects of this alternative application were found, demonstrating the importance of conducting comprehensive research to confirm its economic feasibility.
Climate variability induced the impact of El-Niño Southern Oscillation events on rice-growing areas in the Mekong Delta region
Authors: Yen Ngo T. H. , Nguyet Le T.
Published: January 2025

ABSTRACT The variation of rainfall features under the El-Niño-Southern Oscillation (ENSO) phenomenon, as part of the impacts of climate variability, enhances the potential risk of rice yield decline for rice cultivation regions around the world. The impact of ENSO events on rice cultivation regions in the Mekong Delta (MD) is examined. The study explores how ENSO affects rainfall patterns and subsequently influences rice yield in the region. Analysis of rainfall data from 12 stations between 1985 and 2022 reveals significant shifts in wet season timing due to ENSO events. La-Niña events lead to an average 22-days earlier onset of the wet season, while strong El-Niño events cause delays of up to 24 days. These changes directly impact rice yield, with La-Niña being associated with slight yield increases and El-Niño with substantial yield reductions. The study highlights the vulnerability of rice cultivation regions in the MD to ENSO-driven climate variability, emphasizing the need for proactive adaptation strategies to ensure food security.
Managing Value Creation Paradoxes in Social Business: The Role of the Digital Platform Business Model
Authors: Moura Valéria Feitosa de , Souza Cesar Alexandre de , Scornavacca Eusebio
Published: January 2025

ABSTRACT Objective: this paper examines how business model design influences value creation paradoxes in social businesses, with a focus on DPBMs (digital platform-based models). Methods: case studies in the Brazilian education and employability sector are analyzed using the activity system perspective of business model design. Results: the findings show that DPBM-based social businesses exhibit a mix of traditional business model value drivers (complementarity, lock-in, and novelty) and social business value drivers (impact complementarity, shared values, and integration novelty). DPBMs can help social organizations address the learning paradox and improve activity efficiency for business scalability. However, challenges in implementing DPBMs, such as user group selection, revenue models, and platform access regulation, can amplify performance and learning paradoxes. Conclusions: the study provides empirical evidence supporting specific drivers of social business value while highlighting a coexistence with traditional business model drivers. DPBM can aid scalability but presents challenges impacting performance and learning paradoxes. Insights for managers include the significance of business model design and the need to consider social and traditional value drivers in DPBM decisions.
Efeito de diferentes intensidades de exercício muscular inspiratório no controle autonômico cardíaco no período de recuperação pós esforço em adultos saudáveis: estudo controlado e randomizado
Authors: Souza Pedro Lima , Moreira Leila Dal Poggetto , Silva Lilian Pinto da , Weiss Vinicius Faria , Mira Pedro Augusto Carvalho , Trevizan Patrícia Fernandes , Laterza Mateus Camaroti , Martinez Daniel Godoy
Published: January 2025

RESUMO O objetivo deste trabalho foi investigar o efeito de diferentes intensidades de exercício muscular inspiratório (EMI) no controle autonômico cardíaco no período de recuperação pós esforço em adultos saudáveis. Foi realizado estudo experimental, controlado e randomizado com 15 homens entre 18-40anos, sedentários e saudáveis em quatro sessões de EMI: Sham, 30%, 40% e 60% da pressão inspiratória máxima. Intervalos de pulso foram registrados por fotopletismografia digital infravermelha obtendo valores frequência cardíaca (FC). FC, intervalo entre batimentos, desvio-padrão da média de todos os intervalos RR normais (SDNN), raiz quadrada da média do quadrado das diferenças entre intervalos RR normais adjacentes (RMSSD), porcentagem dos intervalos RR adjacentes com diferença de duração maior que 50ms (pNN50) (domínio do tempo), potência total, potência das bandas espectrais de baixa frequência (LF) e potência das bandas espectrais de alta frequência (HF) (ms²), LF e HF (n.u.) e LF/HF (domínio da frequência) foram medidos simultaneamente por dez minutos no basal e período de recuperação (15, 30, 45 e 60 minutos). Foi utilizado ANOVA two-way, considerando nível de significância de 5%. O RMSSD e pNN50 apresentaram no período de recuperação valores maiores em relação ao basal (efeito tempo: P =0,004; P <0,01, respectivamente). Não houve diferença para variáveis de VFC no domínio da frequência (efeito tempo: P>0,05). Não houve diferença na comparação entre as intensidades para todas as variáveis de VFC (efeito sessões: P>0,05). Concluímos que, independentemente da carga empregada, há aumento semelhante dos índices da modulação autonômica cardíaca parassimpática no período de recuperação pós sessão de EMI em adultos saudáveis.
Variação hemodinâmica e respiratória no teste de caminhada em seis minutos em pacientes submetidos à cirurgia cardíaca: um estudo transversal
Authors: Casagrande Julia , Bodnar Emely Teixeira , Winkelmann Eliane Roseli
Published: January 2025

RESUMO O teste de caminhada de seis minutos (TC6) é prescrito para pacientes que foram submetidos à cirurgia cardíaca, mas a variação hemodinâmica e respiratória ainda é pouco descrita nessa população. O objetivo deste estudo foi comparar a variação dos dados hemodinâmicos e respiratórios, sensação de dispneia, do esforço percebido nos membros inferiores durante o TC6 entre o pré e pós teste e analisar se existe diferença na variação entre o período pré e pós-operatório de cirurgia cardíaca eletiva. Trata-se de um estudo transversal com 113 indivíduos submetidos à cirurgia cardíaca eletiva. O TC6 foi realizado no dia anterior à cirurgia e no quarto dia pós-operatório. Verificou-se que, entre o pré e pós teste, houve aumento das variáveis hemodinâmicas incluindo FC, PAS, PAD (p≤0,01) e da dispnéia e membros inferiores (p≤0,01), tanto no pré quanto no pós-operatório; não houve variação na SpO 2 tanto no pré-operatório (p=0,64) quanto no pós-operatório (p=0,45); e houve diminuição da distância média percorrida no pré de 346,98±107,51 para 252,06±107,17 metros no pós-operatório. Houve maior variação de diferença de médias entre o pré e pós teste para a FC no período pré (p=0,05) e maior sensação de esforço percebido nos MMII no período pós-operatório (p=0,02). Entre o pré e o pós-teste, houve aumento fisiológico dos dados hemodinâmicos, sensação de esforço percebido, sem alteração em SpO 2 e no declínio funcional na distância percorrida entre o período pré para o pós-operatório de cirurgia cardíaca. A FC tem maior variação no pré e o esforço percebido nos MMII no período pós-operatório, embora clinicamente não relevante.
As telas eletrônicas podem influenciar a postura de cabeça e pescoço em adolescentes? Uma revisão sistemática
Authors: Turci Aline Mendonça , Nogueira Camila Gorla , Bersanetti Michelli Belotti
Published: January 2025

RESUMO O objetivo desta revisão sistemática é identificar se as telas eletrônicas podem influenciar a postura de cabeça e pescoço em adolescentes. Foi registrada no International Prospective Register of Systematic Review (PROSPERO), e as bases de dados utilizadas foram EMBASE, LILACS, SciELO, PEDro, PubMed e Scopus, sem limite de idioma ou data de publicação. Os descritores utilizados foram postura, pescoço e adolescentes. Foram encontrados 1.997 artigos com duplicatas e foram excluídos 1.858 artigos pelo título e 65 pelo resumo. Durante a análise do texto na íntegra, 22 foram excluídos porque abordavam indivíduos com média de idade inferior a 15 ou superior a 19 anos, dez não faziam referência ao uso de tecnologia e três avaliavam apenas indivíduos sintomáticos, sendo assim, apenas quatro foram revisados. A qualidade metodológica dos estudos foi classificada de acordo com a Newcastle Ottawa Quality Assessment Scale, sendo que três foram classificados com qualidade metodológica forte e analisaram a postura frente ao uso do computador e um com qualidade fraca, que analisou a postura durante o uso do smartphone. Portanto, com relação ao uso do smartphone, as considerações são limitadas. De forma geral, o uso do computador não é o responsável pelas alterações posturais em cabeça e pescoço em adolescentes, entretanto, mais estudos são necessários para confirmar essa conclusão.
Transcranial Magnetic Stimulation on spasticity in Multiple Sclerosis – protocol for a feasibility study for a randomized, crossover clinical trial
Authors: Corrêa Fernanda Ishida , Reis Amanda Cristina da Silva , Venâncio Bruno Paulino , Corrêa João Carlos Ferrari
Published: January 2025

ABSTRACT Spasticity is a common sequela of multiple sclerosis (MS) that can cause pain, deformities, and impair movement. Transcranial magnetic stimulation (TMS) has been investigated for the treatment of spasticity; however, further investigation is needed. This study aimed to compare the effect of high and low frequency TMS on quadriceps spasticity in MS. Adults diagnosed with MS and who present bilateral quadriceps spasticity will undergo two treatment sessions with TMS. The first session will be randomized to receive high (≥5Hz) or low frequency (≤1Hz) TMS over the left motor cortex; after one week they will receive the second session, which will be the opposite. Spasticity will be assessed bilaterally, before and after each intervention, using the Ashworth scale, the latency of TMS to the quadriceps muscles, the amplitude of the motor evoked potential, the central motor conduction time, the latency time of the patellar reflex, and the amplitude of the quadriceps pendulum test. Statistical analyses will be carried out using the SPSS Statistic program, version 26, with a significance level of p<0.05. The Shapiro-Wilk test will be used to analyze the normality of the variables. Parametric data will be represented as mean and standard deviation and non-parametric data will be represented as median and interquartile range, and frequency and percentage for categorical variables. For the primary outcome, the two-way analysis of variance will be used for parametric data, and the Friedman’s test for non-parametric data.
Estimulação Magnética Transcraniana sobre a espasticidade na Esclerose Múltipla – protocolo para um estudo de viabilidade para um ensaio clínico, crossover e randomizado
Authors: Corrêa Fernanda Ishida , Reis Amanda Cristina da Silva , Venâncio Bruno Paulino , Corrêa João Carlos Ferrari
Published: January 2025

RESUMO A espasticidade é uma sequela comum na esclerose múltipla (EM) a qual pode causar dor, deformidades e interferir em movimentos. A estimulação magnética transcraniana (EMT) tem sido investigada para tratamento da espasticidade; no entanto, carece de mais investigações. O objetivo é comparar o efeito da EMT de alta e baixa frequência sobre a espasticidade do quadríceps na EM. Indivíduos adultos com diagnóstico de EM e que apresentem espasticidade em quadríceps bilateral serão submetidos a duas sessões de tratamento com EMT. A primeira sessão é randomizada para receber EMT de alta (≥ 5Hz) ou baixa frequência (≤1Hz) sobre o córtex motor esquerdo; após uma semana, receberá a segunda sessão, oposta à primeira. A espasticidade será avaliada bilateralmente, antes e após cada intervenção, pela escala de Ashworth, pela latência da EMT ao músculo quadríceps, pela amplitude do potencial evocado motor, pelo tempo de condução motora central, pelo tempo de latência do reflexo patelar e pela amplitude do teste do pêndulo do quadríceps. As análises estatísticas serão realizadas pelo programa SPSS Statistic versão 26, com nível de significância de p<0,05. Será utilizado o teste de Shapiro-Wilk para a análise de normalidade das variáveis. Os dados paramétricos são representados em média e desvio-padrão e os não paramétricos em mediana e intervalo interquartílico, e frequência e porcentagem para as variáveis categóricas. Para o desfecho primário, será utilizado o teste de análise de variância (Anova) de duas vias para os dados paramétricos, e o teste de Friedman para os dados não paramétricos.
Entre «alteridades reprochables» y «otredades irredimibles»: Violencia, moralidad, y los límites de la comprensión etnográfica
Authors: González-Saiz Andrés M.F.
Published: January 2025

Resumen: Violencia, terror y resiliencia son tres temas que han captado la atención de académicos y líderes políticos desde al menos los años 80. Inspirados por el estudio del Holocausto, un número considerable de especialistas surgió con el objetivo de gestionar intervenciones para atender las necesidades de las víctimas de regímenes totalitarios. Mientras tanto, aquellos involucrados activamente en los actos de violencia que produjeron esas víctimas parecen haber sido relegados a un segundo plano. Este artículo examina, por lo tanto, los límites de la comprensión etnográfica a través de dos categorías cruciales para comprender la violencia. Por un lado, las «alteridades reprochables» engloban a individuos o grupos que, a pesar de su involucramiento en actos violentos, aún pueden ser objeto de empatía para el investigador. Por otro lado, las «otredades irredimibles» son aquellos definidas únicamente por medio de una aparente contaminación moral producida por el propio acto que perpetraron. De esta manera, mientras en el primer caso el perpetrador es considerado como una víctima de las circunstancias, en el segundo el acto perpetrado se presenta como abyecto lo que le excluye de la posibilidad de comprensión. Tal dicotomía introducida por estas dos aproximaciones a quienes cometen actos de violencia plantea preguntas importantes para los etnógrafos como, por ejemplo: ¿De qué manera los esquemas morales de los investigadores influyen en su comprensión y descripción de determinados actos de violencia?, y ¿cuáles son las implicaciones políticas y metodológicas para una etnografía de la violencia atrapada entre estas «otredades irredimibles» y «alteridades reprochables»?
‘Confusion of horizons’ with unwanted Others: Frustrations, results and effects of ethnographic practices in the realm of justice and public safety.
Authors: Brama Leonardo , Lima Roberto Kant de , Mota Fabio Reis
Published: January 2025

Abstract: By reviewing various ethnographic experiences, we examine how inhospitality, unwanted and incongruous relationships, tensions and conflicts, inform a type of fieldwork and nevertheless allow-despite the ‘anti-manualistic’ form of this work-creating opportunities for understanding and interpreting the schemes, practices and worldviews of the subjects studied. Despite confronting tortuous paths, mediated by a ‘confusion of horizons’, anthropological research, when informed by questions and analyses with a good theoretical organization and conducted according to qualified ethnographic education, allows deducing broader aspects, related to the practices and representations of the world not only of the universe studied, but of its surroundings. By presenting the results of ethnographies and interactions with various actors in the fields of justice and public safety, we present some analytical devices developed in these two fields through different ethnographic experiences, such as the ‘inquisitorial tradition’ and ‘schismatic rationality’.
The ambiguous other. Engaging with far right and other uncomfortable subjectivities
Authors: Hatzikidi Katerina
Published: January 2025

Abstract: This article explores anthropological hesitation in engaging with “abject” or otherwise “uncomfortable” subjectivities, identifying some of the main concerns and challenges behind it. In doing so, the discussion focuses on far-right subjectivities and on the reasons behind the relative lack of ethnographic studies thereof. Among other things, it is argued that the far-right other does not fit current anthropological orthodoxy in terms of ethnographic approach and therefore represents a kind of ambiguous alterity that poses ethical and methodological challenges for anthropologists. The discussion then brings to light some of the tensions and dilemmas inherent in anthropological approaches to uncomfortable alterities. The article concludes by highlighting what may be at stake for anthropology when excluding certain subjects of research, suggesting instead that their study offers opportunities to expand anthropological horizons of knowledge production, increasing the discipline’s relevance for understanding and analysing complex and troubling contemporary social phenomena.
These men in love with mining companies and pickup trucks: Moralities and knowledge practices of the deserts and movements of the economy
Authors: Guedes André Dumans
Published: January 2025

Abstract: This article’s protagonists are traders and small businesspeople who express their enthusiasm for the start-up of a mining company while admiring the pickup trucks that such an enterprise circulates in a city in the north of the Brazilian state of Goiás. I place the perspectives of these men in a story organized by the fear that this locality becomes a ‘desert’, then consider how they have been relating to recent transformations in the ‘economy’ of this city. I thus bring to the foreground certain moral dimensions of their lives and occupations and the role of pickup trucks as signs and operators of the knowledge practices to which they resort to situate themselves in the face of both long-standing anxieties and these new realities. Finally, I show how this ‘economy of the city’ is outlined by an interweaving of certain branches and productive activities with practices, stories, circulations, rivalries that are markedly masculine, and which are updated in those places and paths where pickup trucks are present.
The battle of the Zé Gotinhas: The schismogenesis of images and political audiences on Brazilian social media
Authors: Silva Kelly Cristiane da , Martins Fábio de Oliveira
Published: January 2025

Abstract: Centring on a dispute between different versions of an icon of public health and immunization policies in Brazil, we explore the analytic potential of the rival images and their embedding in a dynamic structure of long-term schismogenesis fed by former president Jair Bolsonaro, his political allies and publics. The conflict over different versions of Zé Gotinha published at the beginning of Covid-19 vaccination - one produced by the illustrator and designer-activist Cristiano Siqueira, another commissioned by Eduardo Bolsonaro, a federal deputy and a son of the former president-inserted in the context of a semiological guerrilla war, allows us to examine the different images as, simultaneously, part of a confrontation that begins with the images and ends in the structural forces perpetuating the schismogenesis between allies of the former president and his adversaries. Over the course of the text, we identify symbolic offensives and retreats in accordance with the political situation of the moment.
Resisting Bolsonaro: The Mobilization of the Tupinambá of Serra do Padeiro to Defend Their Territory and Collective Projects
Authors: Alarcon Daniela Fernandes , Silva Glicéria Jesus da , Quadros Jéssica Silva de , Silva Sthefany Ferreira da
Published: January 2025

Abstract The main objective of this article is to examine the political mobilization of the Tupinambá of Serra do Padeiro (southern Bahia) during the presidential term of Jair Messias Bolsonaro (2019-2022). In a context of grave rights violations, the Indigenous movement emerged as one of the main forces of resistance to Bolsonarismo. Through an analysis of the strategies developed in Serra do Padeiro, we take five key episodes as starting points: the uncovering of a targeted plan to exterminate Indigenous leaders, an attempt to build a resort on Tupinambá territory, setbacks in the demarcation procedures for the Tupinambá de Olivença Indigenous Territory, mobilization of repressive forces against protective measures adopted in Serra do Padeiro during the Covid-19 pandemic, and the granting of an eviction order against the Tupinambá. Through a detailed examination of a specific case, we seek to contribute to the production on forms of collective action carried out by Indigenous peoples.
Bajo otro nombre: Secretos, complicidades, etnografía
Authors: Shoshan Nitzan
Published: January 2025

Resumen: ¿Cómo han impactado los procesos políticos recientes en la práctica y la ética de la investigación etnográfica, especialmente dado el creciente interés antropológico en estudiar la extrema derecha? Basándome en mi propia experiencia como investigador bajo un nombre falso, en este artículo reconsidero los imperativos éticos de la transparencia total y el consentimiento informado en el contexto del trabajo de campo etnográfico. Argumento que tales estándares éticos presuponen una noción insostenible del sujeto hablante al otorgar al etnógrafo una fijeza y objetividad que, además, normalmente negamos a nuestros interlocutores. En cambio, me pregunto, ¿cómo involucramos a nuestros interlocutores en redes de complicidad mientras retenemos u ofuscamos información en nuestros intercambios con ellos? ¿Cómo, a su vez, ellos nos exigen que correspondamos al mantener sus propias disimulaciones? En particular, examino cuatro problemas de identidad y transparencia en el trabajo de campo etnográfico, a los que llamo coherencia, performatividad, secrecía y complicidad. Mientras que realizar investigación etnográfica bajo un seudónimo resalta de manera excepcionalmente aguda el intenso trabajo metapragmático que implica posicionarse en el campo, sostengo que las preguntas que plantea son de una naturaleza más general para la investigación etnográfica. De hecho, tales preguntas impregnan la vida social en general y, por ende, necesariamente, también los enfoques etnográficos para su estudio.
Explorando as Conexões entre a Literatura e a Matemática: uma análise bibliométrica
Authors: Cristofolini Juliana , Siple Ivanete Zuchi , Rostirola Sandra Cristina Martini
Published: January 2025

Resumo O uso da Literatura na aula de Matemática pode contribuir para a formação dos alunos, auxiliando-os no desenvolvimento das habilidades de argumentação e interpretação. Esta pesquisa apresenta um cenário bibliométrico da articulação entre a Literatura e a Matemática nas pesquisas científicas brasileiras e de que forma tais interrelações se manifestam na Educação Matemática, nos diferentes níveis de ensino da Educação Básica. O estudo esboça um panorama das publicações científicas que articulam a Literatura e a Matemática, na forma de uma análise bibliométrica de abordagem quanti-qualitativa, ordenada através de alguns passos metodológicos: determinação da questão de pesquisa; definição da fonte de pesquisa; escolha das palavras-chave; estabelecimento dos critérios de inclusão e exclusão; realização de análises descritivas. A coleta de dados foi realizada no Portal de Periódicos da Capes. Para a realização da bibliometria foi utilizado o software R em sua interface RStudio em interação com a ferramenta Biblioshiny. Com base nos critérios estabelecidos, este trabalho contemplou um portfólio de 42 artigos para análise e discussão dos dados. Os resultados revelam que a articulação entre Literatura e Matemática é um campo de pesquisa recente, destacando-se predominantemente na Educação Infantil. Também apontam indícios de que há um número reduzido de pesquisas que abordam as inter-relações entre a Matemática e a Literatura em turmas do Ensino Fundamental – Anos Finais e Ensino Médio. Essa lacuna sugere uma oportunidade promissora para futuras pesquisas explorarem o potencial da Literatura articulada à Matemática para esses níveis educacionais.
Mapeamento Bibliométrico e Revisão Sistemática das Produções Científicas sobre Memória Escolar, Matemática e Pessoas Idosas (PIs) em Eventos de Educação Matemática entre 2001 e 2021
Authors: Mangueira Rômulo Tonyathy da Silva , Silva Alcina Maria Testa Braz da
Published: January 2025

Resumo O avanço do contingente populacional de pessoas idosas (PIs) é uma realidade mundial que requer mudanças conceituais, procedimentais e atitudinais quanto a reintegração e inclusão social destes, sobretudo no que tange a Educação. Por outro prisma, entende-se a Matemática como um saber formativo que possibilita empreender leituras no cotidiano, impressa e expressa pelo exercício da democracia e da cidadania. No entanto, as pesquisas no âmbito das Ciências Humanas e Sociais Aplicadas, em especial no campo da Educação Matemática, no que se refere as memórias escolares de PIs em relação a matemática são escassas quantitativamente. Posto isso, analisou-se 9.693 produções em três eventos acadêmicos reconhecidos em relevância e espessura científica pela Sociedade Brasileira de Educação Matemática no período de 21 anos (2001-2021), sendo eles: Encontro Nacional de Educação Matemática (ENEM), Seminário Internacional de Pesquisa em Educação Matemática (SIPEM) e o Simpósio Internacional de Pesquisa em Educação Matemática (SIPEMAT). Diante do mapeamento bibliométrico e de uma revisão sistemática verificou-se que a frequência de trabalhos com escopo nos descritores (i) idosos(as)/terceira idade, (ii) memória e (iii) matemática correspondem a 0,11% do todo – um resultado ainda insuficiente numericamente visto o cenário e as tendências estatísticas acentuadas de crescimento. Assim, estruturou-se um estudo de abordagem qualiquantitativa de natureza exploratória, analisando as contribuições dessas produções para o ensino de Matemática, suas implicações e enfoques culturais. Observou-se que trata de um fenômeno carente de estudos mais profundos na seara da educação popular, da articulação interdisciplinar e de reconhecimento enquanto campo de atuação em ascensão.
O conceito de pobreza na abordagem das necessidades humanas
Authors: Silva Ana Márcia Rodrigues da , Neder Henrique Dantas
Published: January 2025

Resumo A pobreza é frequentemente estudada com base em uma única dimensão, predominantemente representada pela renda. Mas existem outras dimensões relevantes nas discussões sobre o tema, como estar bem nutrido, estar bem abrigado, ter boa saúde e participação na sociedade, entre outras. Uma abordagem que pode auxiliar a sustentar esta concepção multidimensional para a pobreza é a abordagem das necessidades humanas. Assim sendo, neste trabalho, objetiva-se apresentar o quadro evolutivo dessa abordagem a fim de estabelecer um conceito multidimensional para a pobreza. Por meio de uma análise teórica, ao longo deste estudo, demonstrou-se que a abordagem das necessidades humanas é marcada por uma variedade de interpretações. A abordagem evoluiu para incorporar aspectos que, se não forem satisfeitos, limitam e impedem as pessoas de usufruírem de uma vida digna. Portanto, em oposição à ideia fundamentada estritamente na renda, a pobreza passa a ser entendida como não satisfação das necessidades.
Money, the market, and the military origins of the American System
Authors: Trebat Nicholas Miller
Published: January 2025

Abstract This article discusses the development of mass production technology in the United States. Like spaceflight and the computer, this technology grew out of a state-led effort to promote technical progress in weapons and defense production, giving rise to what was known in the 19th century as the “American System of manufactures”. Though the roots of this system in military-industrial policy are well-established, economists continue to suggest that technical progress in 19th-century America was a market-driven affair, led by entrepreneurs eager to reduce production costs and obtain patents. We offer a different perspective, based on extensive historical research on this topic. We discuss the origins of interchangeable parts technology in Europe, its early development in the United States, and its diffusion to consumer goods manufacturing after 1850. We also reflect on the reasons for the United States War Department’s interest in this technology after 1800.
Global value chains, technological sophistication and economic complexity: panel data for 58 economies from 2006 to 2015
Authors: Manso Raul Costa Cavalcanti , Hermida Camila do Carmo
Published: January 2025

Abstract In the 21st century, the intensification of global production networks has made it important to understand the implications for the productive structures of countries important. This study aims to investigate whether participation in global value chains (GVCs) can change the degree of technological sophistication of exports and a country’s economic complexity, considering a sample of 58 countries and a subsample consisting only of developing countries, from 2006 to 2015. We estimate dynamic models by difference and system GMM considering two dependent variables: an export sophistication index (‘q’) and the economic complexity index. We find a positive and significant relationship between participation in GVCs and degree of sophistication of the export basket, measured by the ‘q’ index. However, considering a broader measure of economic complexity (the ECI index), the effects were negative and not significant for developing countries.
Governança e Apropriação de Valor na Bioeconomia do Cacau no Amazonas
Authors: Trindade Lucas Xavier , Saes Maria Sylvia Macchione , Fernandes José Augusto Lacerda , Marcovitch Jacques
Published: January 2025

RESUMO Objetivo: o artigo tem como objetivo identificar os mecanismos que regem a governança e determinam as possibilidades de apropriação de valor (renda) por parte dos produtores extrativistas que participam das diferentes cadeias de valor da bioeconomia do cacau no Amazonas. Marco teórico: ao abordar a influência da especificidade dos ativos e do poder de barganha no processo de apropriação de valor, a pesquisa se alicerça na economia dos custos de transação para formular duas proposições teóricas. Métodos: por meio de um estudo de casos múltiplos, investigou-se a dinâmica de diferentes cadeias de valor da bioeconomia do cacau no Amazonas, estabelecidas em torno dos rios Madeira e Juruá. Foram analisados dados secundários (documentos) e primários (entrevistas e grupo focal) por meio da análise temática. Resultados: nas cadeias de cacau commodity e especial são estabelecidos mecanismos diferenciados de governança relacional, que configuram a distribuição de poder de barganha entre intermediários e produtores e, por consequência, a capacidade de apropriação de valor desses agentes. Conclusão: o poder de barganha em favor dos produtores depende da presença de ativos específicos posicionados em seu benefício. Quanto maior o nível de ativos específicos envolvidos na transação em favor dos extrativistas, como ocorre na cadeia de cacau especial, maior tende a ser o seu poder de barganha e, por consequência, a sua capacidade de apropriação de valor. Estruturar cadeias de valor baseadas em ativos específicos constitui uma diretriz-chave para o desenvolvimento de uma bioeconomia inclusiva na Amazônia.