bluuebunny/crossref_metadata_2025 huggingface dataset:
Tensile testing of high-speed rail wheels using tiny specimens
Authors: Zhu Lin-Mao , Wang Gui-Yong , Wang Hai-Zhou , Wang Peng , Song Yan , Li Dong-Ling , Ye Min , Jia Yun-Hai
Published: February 2025

High-speed rail wheels are critical components responsible for load-carrying, guiding, and transferring traction and braking forces, impacting the safety, stability, and reliability of trains. Among the mechanical properties of high-speed rail wheels, tensile properties influence both heat treatment and overall performance evaluation. This study investigated the tensile properties of the rim and spoke of high-speed rail wheels using both conventional and tiny specimens. Additionally, tensile tests were conducted on tiny specimens sampled along the axial and circumferential directions of the wheel rim to assess the distribution of tensile properties. The tensile properties of tiny specimens of the spoke closely aligned with those of conventional specimens. However, the results obtained using tiny and conventional specimens of the wheel rim, although similar, showed greater variability. The tensile properties of the wheel rim exhibited a gradient distribution, with the highest tensile strength near the tread side and the lowest near the spoke side. The plasticity parameters showed minimal variation along both the axial and circumferential directions of the rim. This study provides valuable insights for optimizing the production process of high-speed rail wheels, ultimately enhancing their overall quality. The findings are significant for improving technical support in the manufacturing of high-speed rail wheels.
Crystal structure of N-((3-cyano-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-5-yl)carbamoyl)-2,6-difluorobenzamide, C20H7Cl2F8N5O3S
Authors: Fang Yingchun , Song Changlei , Duan Yu-e , Xie Xiaoxue , Du Qingbo
Published: February 2025

C20H7Cl2F8N5O3S, monoclinic, P21/n (no. 14), a = 7.78993(14) Å, b = 11.8299(2) Å, c = 25.8640(5) Å, β = 93.1491(17)°, V = 2379.87(7) Å3, Z = 4, R
gt(F) = 0.0540, wR
ref(F
2) = 0.1306, T = 100 K.
Effect of tramp elements on the microstructural evolution of a ferritic-pearlitic steel
Authors: Hatzenbichler L. , Vincely C. , Haslberger P. , Galler M. , Glushko O. , Holec D. , Clemens H. , Schnitzer R.
Published: February 2025

Pursuing the reduction of CO2 emissions, steel industry shifts towards a scrap-based electric arc furnace production that results in elevated levels of tramp elements. The effect of these elements on material properties and microstructure is not understood in detail in advanced microstructural complex steels. This study employs methods to investigate the microstructure of a typical cold headed wire-rod steel, micro-alloyed with vanadium, from blast furnace production and a trial alloy with intentionally increased tramp element concentrations.

Light optical microscopy is performed to determine grain sizes of the ferritic-pearlitic microstructure and their phase fractions. The interlamellar spacing of pearlite is explored with scanning electron microscopy. Additionally, the regularity of pearlite lamellae is assessed with a machine learning approach. Thermally etched austenite grains are observed with a high-temperature laser scanning confocal microscope at 1000 °C. A comparison to recalculated prior austenite grains from electron backscatter diffraction patterns is performed. The microstructure after cooling is analyzed by LePera etching and phase maps are obtained by electron back scatter diffraction.

The results show that tramp elements do not have an influence on the grain size and phase fractions of the ferritic-pearlitic microstructure in the studied alloy. However, it seems that regular growth of the lamellae is impeded in the trial alloy. Moreover, smaller prior austenite grain sizes are observed and displacive constituents are significantly pronounced, if tramp elements are increased in the alloy.
Metallurgical failure analysis of small-bore tube compression fitting that fractured in a gas turbine burner test rig
Authors: Fischer B. , Giller M. , Neidel A.
Published: February 2025

After several combustion tests with natural gas-hydrogen mixtures, a fracture occurred inside the compression fitting during disassembly of a thin-walled ¼-inch tube due to high-cycle fatigue fracture. There was no evidence of hydrogen embrittlement or other damage mechanisms.
Key Determinants of Successful Advertising in the Context of SMEs: An Empirical Analysis in Ecuador
Authors: Pérez-Campdesuñer Reyner , Sánchez-Rodríguez Alexander , García-Vidal Gelmar , Martínez-Vivar Rodobaldo , De Miguel-Guzmán Margarita
Published: February 2025

Today there is an almost unquestionable recognition of the impact that good advertising actions could have on sales. However, what is not entirely clear is which variables could favor or limit the impact of advertising actions in the context of micro, small and medium enterprises (MSMEs). In this sense, this research aimed to delve into which variables affect and to what extent they do so in the impact of advertising campaigns on the increase in the results of MSMEs in Ecuador. For this purpose, an analysis of advertising campaigns was carried out in 425 representative organizations of different activities, such as: gastronomy, personal services, clothing trade, food trade or supplies trade; In the same way, the commercialization is carried out in a personal, indirect or mixed way and they use as communication media: Internet, television, press or print media, radio or mixed. The study evaluated variables such as: the level of competition, customer satisfaction, the intensity and quality of the campaign, the capital invested, the stage of the life cycle or the age of the product that is advertised. As a general result, the existence of a direct correlation between the increase in sales and independent variables such as: invested capital, intensity of campaign, customer satisfaction; and a negative correlation with the level of competence and the stage of the life cycle. No differences were found between the different media, the type of activity or the sales mechanism.
Explicit inverse of symmetric, tridiagonal near Toeplitz matrices with strictly diagonally dominant Toeplitz part
Authors: Kurmanbek Bakytzhan , Erlangga Yogi , Amanbek Yerlan
Published: February 2025

Let

T

n

=
tridiag

(

−
1
,
b
,
−
1

)

{T}_{n}={\rm{tridiag}}\left(-1,b,-1)

, an

n
×
n

n\times n

symmetric, strictly diagonally dominant tridiagonal matrix (

∣
b
∣
>
2

| b| \gt 2

). This article investigates tridiagonal near-Toeplitz matrices

T

˜

n

≔

[

t

˜

i
,
j

]

{\widetilde{T}}_{n}:= \left[{\widetilde{t}}_{i,j}]

, obtained by perturbing the

(

1
,
1

)

\left(1,1)

and

(

n
,
n

)

\left(n,n)

entry of

T

n

{T}_{n}

. Let

t

˜

1
,
1

=

t

˜

n
,
n

=

b

˜

≠
b

{\widetilde{t}}_{1,1}={\widetilde{t}}_{n,n}=\widetilde{b}\ne b

. We derive exact inverses of

T

˜

n

{\widetilde{T}}_{n}

. Furthermore, we demonstrate that these results hold even when

∣

b

˜

∣
<
1

| \widetilde{b}| \lt 1

. Additionally, we establish upper bounds for the infinite norms of the inverse matrices. The row sums and traces of the inverse provide insight into the matrix’s spectral properties and play a key role in understanding the convergence of fixed-point iterations. These metrics allow us to derive tighter bounds on the infinite norms and improve computational efficiency. Numerical results for Fisher’s problem demonstrate that the derived bounds closely match the actual infinite norms, particularly for

b
>
2

b\gt 2

with

b

˜

≤
1

\widetilde{b}\le 1

and

b
<
−
2

b\lt -2

with

b

˜

≥
−
1

\widetilde{b}\ge -1

. For other cases, further refinement of the bounds is possible. Our results contribute to improving the convergence rates of fixed-point iterations and reducing the computation time for matrix inversion.
The future Barents Sea—A synthesis of physical, biogeochemical, and ecological changes toward 2050 and 2100
Authors: Årthun Marius , Dinh Khuong V. , Dörr Jakob , Dupont Nicolas , Fransner Filippa , Nilsen Ina , Renaud Paul E. , Skogen Morten D. , Assmy Philipp , Chierici Melissa , Duarte Pedro , Fransson Agneta , Hansen Cecilie , Nascimento Marcela C. , Pedersen Torstein , Smedsrud Lars H. , Varpe Øystein , Cnossen Frida
Published: February 2025

The Barents Sea is a hotspot for ongoing Arctic climate change, manifested in a rapid warming of the ocean and the atmosphere and a strong decline of the winter sea-ice cover. These changes in the physical environment have large consequences for marine ecosystems, including commercial fish populations. In a warmer future climate, both physical and ecological changes are expected to intensify. Here, we provide a first comprehensive overview of future climate change projections for the Barents Sea, and the associated physical, biogeochemical, and ecological consequences based on climate models and end-to-end ecosystem models. We also discuss potential future changes in human activities and their impacts, including changes in shipping activity and contaminants. We analyze results for two time horizons—the near-future (2040–2050) and the far-future (2090–2100)—and for two different emission scenarios: one with moderate future greenhouse gas emissions (SSP2-4.5) and one high-emission scenario (SSP5-8.5). The projections show that the future Barents Sea will be warmer, less ice-covered, more acidic, and more productive, with fish populations and spawning sites moving northward. There are small differences in multi-model mean physical and biogeochemical projections between the two emission scenarios by 2050, while large scenario differences emerge toward the end of the century. The implications of these results are far-reaching, including identifying the sensitivity of ecosystem change to future emissions, informing regional management strategies, and potentially identifying needs for adaptation to changes already likely to occur.
Generation and Stress Analysis of Helical Gear Tooth Combining Involute with Epicycloidal and Hypocycloidal Profiles
Authors: Kadhim Mohammed Abdulaal , Abdullah Mohammad Qasim
Published: February 2025

This paper examines the helical gear that combines the involute with epicycloidal-hypocycloidal profiles. The tooth profile was produced through the shaper-cutting process, which was conducted using an appropriate rack cutter with a Cartesian coordinate system. A computer program was developed using Microsoft Visual Basic and subsequently integrated into SolidWorks using the application programming interface. This numerical investigation aims to analyze the impact of tool parameters on the produced gear tooth profile, with the goal of enhancing the dynamic performance and deformation resistance of the proposed helical gear model. Additionally, this study assesses the effect of teeth thickness on the helical gear model. The results indicate a highly accurate approximation of the involute, cycloidal, and modified gear tooth profiles, which were programmed according to the module, teeth number, and rolling angle. The use of a combination of curves (epicycloidal, involute, and hypocycloidal) in a single tooth resulted in a larger contact area, thereby improving the ability of the gears to withstand greater pressures and extending their lifespan. The modified non-parallel helical gear drive outperformed other non-parallel helical gear drives. The best enhancements in maximum contact stress and teeth bending stress achieved approximately 33.169% and 26.08% compared to the standard involute profile and about 17.69% and 0.67% when compared to the cycloidal profile.
Enhancing Nazir Capacity through Legal Literacy of Land Trust to Ensure Legal Certainty in Waqf Land Management
Authors: Suhadi Suhadi , Dani Muhtada  , Asmarani Ramli  , Imam Baehaqie  , Isnani  , Ardi Sirajudin Rauf  , Lucky Andinna Santyoko  , Muhammad Ridha
Published: February 2025

Nazir as the party who received the mandate to receive and manage waqf land faced several problems related to waqf land. These problems are that the waqf land has not been certified, the waqf land is in dispute, the waqf land has been lost/controlled by another party. This problem occurs because the practice of waqf land is carried out verbally on the basis of mutual trust, the waqf pledge has not been made before PPAIW, the waqf pledge deed has not been processed, the waqf land has not been registered, and the waqf land has not been utilized according to the waqf pledge. Through community service activities, Nazir's capacity was increased through literacy in land waqf law. Legal literacy includes the land waqf process and waqf land registration. The legal act of donating land must be carried out according to the Waqf Law, carried out before an authorized official and the waqf land is registered at the Land Office. The waqf pledge must be made in front of the Waqf Pledge Deed Registrar to be recorded in the Waqf Pledge Deed. The Waqf Pledge Deed is written evidence in land registration at the Land Office, as the basis for issuing a Waqf Land Certificate. Waqf Land Certificates are issued to create legal certainty and legal protection for land waqf. The regulation of land waqf in the Waqf Law and its implementing regulations further confirms waqf as an important and useful institution for efforts to realize community welfare, in line with the goals of state life.
Moving Together to Make Lerep Village in Semarang Regency Safe from Sexual Violence
Authors: Rofi Wahanisa  , Rahmawati Prihastuty  , Pradipta Christy Pratiwi  , Dyah Ayu Rahmawati  , Moh Iqbal Mabruri  , Santi Rohmawati  , Inge Widya Pangestika  , Adiyatma Septhian Eka
Published: February 2025

Sexual violence against children in Central Java shows the highest percentage among other types of violence at 46.6%, while sexual violence against women is at 14.7%. This high incidence of violence is an important concern, especially in Semarang Regency, which is ranked third in Central Java. Sexual violence is vulnerable in public places, such as tourist attractions. Although cases of sexual violence that occur in Lerep Tourism Village have not yet surfaced, preventive efforts to prevent sexual violence against women and children need to be intensified. The solution offered through this community service proposal is the implementation of psychoeducation for youth organizations in Lerep Village related to sexual violence. This program is in line with the 8th mission of Lerep Village in efforts to provide services, protection, and social empowerment for vulnerable groups, the poor, the elderly, orphans / orphans, people with disabilities and pregnant women. Therefore, psychoeducation on sexual violence and types of sexual violence, knowledge about healthy relationships and handling sexual violence both legally and psychologically was prepared. This psychoeducation also aims to equip teenagers in Lerep Village who are engaged as agents of change in an effort to prevent sexual violence and handle it if it occurs in the Lerep tourist village.
The Potential Role of Placenta Morphological, Cytogenetic and Histological Findings in Fetal Phenotype Modeling: A Case Report with Unanswered Questions
Authors: Strautmane Estere , Korņejeva Liene , Ločmele Dzintra , Riekstiņa Marta , Bokučava Diāna , Vedmedovska Natālija
Published: February 2025

Placental abnormalities significantly contribute to fetal mortality. Maternal vascular underperfusion emerges as the prevailing diagnosis. At the same time, genomic alterations within the placenta might play a role in the development of placental dysfunction. We present a case report of a 24-year-old primigravida with an uneventful medical history, admitted at 21 weeks and 2 days gestation. Despite a low risk for typical trisomies, a high risk for preeclampsia and fetal growth restriction (FGR) was recognized in the first trimester. Anhydramnios, abnormal placental morphology, retrochorial and retromembranous hematomas were observed, prompting the termination of pregnancy (TOP). Histological examination revealed multiple placental abnormalities, while the fetus displayed normal anatomy and phenotype. Discussion encompasses the varied manifestations of histopathological findings, and potential associations with adverse pregnancy outcomes. Our case underscores the importance of meticulous evaluation and multidisciplinary collaboration in managing pregnancies with placental anomalies. Further research is crucial to discern the intricate relationship between placental cytogenetics, morphology, and pregnancy outcomes, thus facilitating better clinical management and counseling strategies.
Ovarian Epithelioid Hemangioendothelioma. Case Report
Authors: SVINTSITSKIY V. , TSIP N. , NESPRYADKO S. , SAMOKHVALOVA O. , KHOPTIANA O. , YERIUSHKIN D. , KROTEVYCH M. , TROKHYMYCH S. , SKORODA L.
Published: February 2025

Epithelioid hemangioendothelioma is a rare vascular sarcoma commonly occurring in the liver, soft tissues, and organs of the chest cavity. This study provides a detailed description of the clinical presentation, diagnosis, and treatment of epithelioid hemangioendothelioma of the ovary in a 71-year-old patient. According to the pathohistological examination, a mesenchymal tumor of the ovary with epithelioid cells was diagnosed. The immunohistochemical tests confirmed the diagnosis of epithelioid hemangioendothelioma. This clinical case is of interest for clinical practitioners due to the rare location of the tumor in female reproductive organs, which has not been previously documented in the medical literature.
Bulbophyllum lampadion (section Monanthes), a new species from New Guinea
Authors: Vermeulen Jaap J. , Perry Malcolm , Schuiteman André
Published: February 2025

Bulbophyllum lampadion from New Guinea is herein described and illustrated based on herbarium specimens and cultivated material. This high-elevation species belongs to section Monanthes, of which sect. Oxysepala is here considered to be a synonym.
Pleurothallis cop-biodiversitatis (Pleurothallidinae), a new species from Colombia
Authors: Sierra-Ariza Mario Alexei
Published: February 2025

A new species, Pleurothallis cop-biodiversitatis, belonging to Pleurothallis
subsection Macrophyllae-Fasciculatae,
from the Central Andes of Colombia, is described and illustrated. This
new species is compared with Pleurothallis matudana and Pleurothallis tandapiensis, the most morphologically similar species. Pleurothallis cop-biodiversitatis primarily differs from these
species in having a lip with erose margins, more pronounced basal lobes, a rounded, apiculate apex, and a sulcate
blade with a lanceolate, strongly vesiculate concavity.
Rostellum in orchids
Authors: Kobayashi Hideka , Arditti Joseph
Published: February 2025

The rostellum, a small structure located above the stigma in the gynostemium of monandrous orchid flowers, separates the pollinia from the stigma, can prevent self-pollination, and plays an important role in pol- lination. It secretes a sticky exudate before and after anthesis, to which the pollinia are attached. Additionally,the viscidium, a sticky disk at the base of the stipe, also connects to the rostellum. This structure varies among species and holds taxonomic significance. For example, in Catasetum, the rostellum extends into antennae-like projections. After pollination, emasculation, or injury, the plant hormone ethylene is produced, triggering various post-pollination, post-emasculation, and post-injury processes, including changes in perianth color, senescence, and, ultimately, the death of floral segments that have completed their functions. Although the rostellum plays a significant role, it remains understudied, and many aspects of its function are still unknown. This review high- lights current knowledge and explores speculative hypotheses that may invite differing opinions and perspectives, which will likely be revised as future research deepens our understanding of its biological and ecological roles.
La semana trágica en Barcelona en 1909 y un cuento sobre dos masones
Authors: Hottinger Craig Sylvia
Published: February 2025

A través de una revisión de las fuentes de la Semana Trágica en Barcelona y el estudio de las fotografías de los eventos de 1909 vemos como el Imperio español no solamente persiguió a las personas que colonizó sino también a la gente de su propio pueblo. Igualmente, es la historia de los dos masones acusados de organizar la rebelión. Algunas de estas imágenes se confunden con las fotografías hechas durante la Guerra Civil Española en Barcelona (1936-1939).
El anticlericalismo durante la República Restaurada. El caso de El Libre Pensador. México: 1870
Authors: Santillán Salgado Gustavo
Published: February 2025

El artículo explora el anticlericalismo en México durante la República Restaurada (1867-1876) a través del periódico El Libre Pensador (1870). Propone que la publicación es tanto una respuesta a la edición de medios católicos como una tentativa de unidad en torno a la Reforma. No obstante, también es un indicio de las pugnas intra masónicas. Describe operaciones conceptuales para construir una visión unificada del devenir liberal y argumentar una mirada crítica de la Iglesia católica. Así, la publicación procura el asentamiento definitivo de la Reforma como punto de quiebre de la historia mexicana.
VII Simposio Internacional de Historia de la Masonería y los Movimientos Asociativos en Latinoamérica
Authors: Martin Lautaro
Published: February 2025

Reseña
VII Simposio Internacional de Historia de la Masonería y los Movimientos Asociativos en Latinoamérica: Secularización y laicidad. Múltiples abordajes (siglos XVIII-XXI). Universidad Nacional de La Pampa, Santa Rosa, La Pampa, Argentina, septiembre 16-21, 2024.
Introduction to ACI/PCI 319-25: Structural Precast Concrete
Authors: Cleland Ned , Gallandorm Edith
Published: February 2025

This article introduces the new ACI/PCI 319 code, Building Code Requirements for Structural Precast Concrete—Code and Commentary. This document, developed jointly by the American Concrete Institute (ACI) and PCI, is based on existing concrete code requirements from Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19) and includes additional design require¬ments developed by PCI specifically for structural precast concrete components and systems.
Intra-sinus decontamination for maxillary sinus infection related to the apically exposed implant in the sinus: A report of two cases
Authors: Park Won-Bae , Buranawat Borvornwut , Shin Seung-Il , Lim Hyun-Chang
Published: February 2025

The apically exposed implant in the maxillary sinus may contribute to sinus inflammation during the early healing phase or afterward. The exposed surface of the implant can act as a reservoir for infectious agents. This case report presents two cases where an intraoral approach was used to manage maxillary sinus infections related to exposed implants within the sinus. In both cases, bony access windows were created on the lateral wall of the sinus to reach the apically exposed portion of the implant. In case 1, mechanical (titanium curettes and a rotating titanium brush) and chemical decontamination (tetracycline HCl solution-soaked cotton pellets) were performed. In contrast, case 2 involved chemical decontamination performed only after removing inflammatory tissues and fluids. Following treatment, the patients' sino-nasal symptoms completely resolved. Radiographic evaluations showed a significant reduction in mucosal thickening and bone formation around the exposed portion of the implant. Intra-sinus decontamination may be a viable option for treating infected maxillary sinuses related to apically exposed implants. The current protocol should be verified in more cases with longer-term follow-up.
(Des)Coordenação das políticas monetária e fiscal sob incerteza política e econômica no Brasil
Authors: Salomão Neto Benito Adelmo , Silva Cleomar Gomes da
Published: February 2025

Resumo Este artigo avalia a coordenação entre as políticas monetária e fiscal sob incerteza político-econômica no Brasil, para dados mensais entre 2003 e 2022. Por meio de um Sistema de Equações Simultâneas, estimado via Método dos Momentos Generalizados (GMM), os resultados indicam que a política monetária atua de forma anticíclica. Já a política fiscal tem comportamento dúbio: sob incerteza ela é pró-cíclica, mas na ausência de incerteza ela é anticíclica. Sob coordenação das políticas macroeconômicas, as ações fiscais expansionistas geram uma condução de política monetária mais contracionista. Por sua vez, essa contração produz afrouxamento fiscal, visando atenuar o ciclo econômico. Já o Banco Central parece atuar mais no formato de duplo mandato, buscando o controle inflacionário, mas sem negligenciar o nível de atividade econômica. Finalmente, há evidência de uma taxa de inflação brasileira com elevado componente inercial e, sob incerteza político-econômica, os resultados em termos de dinâmica do PIB são piores.
Long-lasting drought and adolescent socioemotional skills
Authors: Martins Francisco Mário Viana , Barbosa Rafael Barros
Published: February 2025

Abstract Socioemotional skills are key determinants of adult life outcomes. Significant changes in economic conditions can affect the formation of such skills, especially at more vulnerable ages. In this paper, we study how a long-lasting drought event is associated with adolescents' accumulation of socioemotional skills. Between 2012 to 2015, the Brazilian semi-arid region was exposed to a long-lasting exogenous drought. Comparing students exposed versus not exposed to the drought in the state of Ceará, we found evidence that the drought episode significantly reduced students’ conscientiousness skills, a skill related to persistence, organization, and focus. We confirmed these results by investigating the facets associated with conscientiousness, socioemotional traits and other related outcomes, such as student aspiration. This paper showed that a steep increase in drought can be correlated with students’ socioemotional skills, especially at sensitive ages of socioemotional formation.
Mechanical Properties of UNS S31803 (2205) Duplex SS Welds Deposited with GTAW and SMAW Methods
Authors: Çelik Başar Ersegün , Talaş Şükrü
Published: February 2025

Abstract Duplex stainless steels have superior mechanical and corrosion properties with better toughness and ductility compared to austenitic and ferritic stainless steels due to their dual phase microstructure i.e. austenite and ferrite, which is attractive for gas pipelines. In this study, effects of different heat inputs and interpass temperatures were investigated on the mechanical and microstructural properties of UNS-S31803-(2205) duplex stainless steel welds using two different welding methods i.e. Gas Tungsten Arc Welding and Shielded Metal Arc Welding in place of conventionally used Submerged Arc Welding. UNS-S31803-(2205) duplex stainless steel pipe was joined using ER2209 (GTAW) filler wire and ESAB OK67.55 (SMAW) electrode. Pure argon was used as shielding gas and for back-root protection. Microstructural examinations and mechanical tests were carried out in accordance with PTS and ASME standards. Results showed that, two different welding methods generated a weld joint with higher strength and hardness than base metal at certain heat inputs and interpass temperatures. Weld metal properties were within the defined limits of standards and the critically selected interpass temperature and heat input which induced different cooling conditions with multiple passes produced a welded joint without the formation of deleterious sigma phase in weld metal and the heat affected zone.
DESCARTE RESPONSÁVEL DE LIXO ELETRÔNICO E COMPORTAMENTO DO CONSUMIDOR: UMA REVISÃO SISTEMÁTICA DA LITERATURA
Authors: Dias Gabriela Figueiredo , Ramos Anatália Saraiva Martins , Bastos Evangelina de Mello , Cortez Ana Eliza Galvão
Published: February 2025

RESUMO O presente artigo tem como objetivo analisar o estágio do progresso e o fluxo dos estudos sobre descarte responsável de lixo eletrônico e comportamento do consumidor. Para tanto, foi realizada uma revisão sistemática da literatura. Após buscas em bases científicas e aplicação de estratégias de seleção de artigos, a amostra contou com 50 artigos que passaram por análise bibliométrica e análise temático-categorial. Os resultados evidenciam que as pesquisas são recentes, a maioria foi publicada nos últimos cinco anos (2019-2023), o que mostra a contemporaneidade do tema. Os artigos abordam assuntos como: comportamento e intenção de descarte responsável; conhecimento e conscientização ambiental; armazenamento domiciliar de lixo eletrônico; influência de informação e publicidade; percepção do tempo de vida útil de eletrônicos; influência do Word-of-Mouth (WoM); e venda de eletrônicos obsoletos em plataformas Consumer-to-Business (C2B). As principais lacunas apontadas para futuras pesquisas são: influência da obsolescência planejada e obsolescência psicológica; influência das recompensas financeiras; preocupação com a privacidade dos dados; venda de eletrônicos fora de uso em plataformas C2B e Consumer-to-Consumer (C2C); e estudos associando descarte responsável e desejabilidade social.
O IMPACTO DO FORESIGHT NAS ESTRATÉGIAS DE TRANSFORMAÇÃO DIGITAL
Authors: Rosa Luccas Martins da , Janissek-Muniz Raquel , Salerno Felipe Fonseca
Published: February 2025

RESUMO Pesquisas sugerem que a utilização do foresight, com foco na construção de cenários futuros que apoiem a tomada de decisão das organizações, é essencial na formulação de estratégias de Transformação Digital (TD) nas firmas, embora não tenham sido encontrados estudos comprovando quantitativamente essa relação direta (foresight versus TD). O objetivo deste estudo é validar a relação entre o foresight e fatores para a TD nas firmas. Adotando um método quantitativo, foi aplicada uma survey junto a 258 profissionais de empresas brasileiras encarregados de processos de TD, ou consultores de TD e foresight. Os resultados foram analisados pelo método de modelagem de equações estruturais com estimação por Mínimos Quadrados Parciais (PLS-SEM) e validam as hipóteses sugeridas. Como conclusão, é possível evidenciar que os fatores individuais e processuais do foresight e os fatores organizacionais possuem inter-relação, bem como que os fatores organizacionais apresentam relação direta com a TD nas firmas. Esta pesquisa valida a relação entre a aplicação do processo de foresight e o sucesso das estratégias de TD, servindo também como validação de escalas já existentes de maneira combinada. Assim, promove acúmulo de conhecimento acadêmico e possibilita a comparação de resultados em diferentes contextos.
ADMINISTRAÇÃO DA JUSTIÇA: UM ENSAIO SOBRE AS DIMENSÕES E AS VARIÁVEIS EXPLICATIVAS DO DESEMPENHO JUDICIAL
Authors: Sátiro Renato Máximo , Sousa Marcos de Moraes , Correia Pedro Miguel Alves Ribeiro
Published: February 2025

RESUMO Observa-se que o desempenho organizacional é um dos conceitos centrais na pesquisa em Administração Pública e tem ganhado importância na administração da justiça. No entanto, a despeito de tal importância, observa-se que o setor público ainda enfrenta entraves na mensuração de seu desempenho. O Judiciário não é imune a tal constatação, pelo contrário, como um dos poderes mais conservadores do Estado, observa-se que somente recentemente passou a ocupar-se de questões relativas à gestão de seus serviços. O objetivo do ensaio é discutir as variáveis componentes do desempenho judicial, bem como suas dimensões de análise. Foi realizada uma revisão narrativa. A literatura corrobora a multiplicidade de dimensões e de componentes das dimensões de desempenho, evidenciando um construto complexo, multifacetado e, por vezes, de difícil mensuração. O estudo contribui de três formas: trata de tema interdisciplinar envolvendo Direito, Administração Pública e Economia; identifica conceitos, métodos e abordagens, em que os estudos empíricos quantitativos têm sido operacionalizados; e propõe uma agenda de pesquisa sobre o tema.
Nanomaterial application for protein delivery in bone regeneration therapy
Authors: Hariawan B.S. , Miatmoko A. , Anjani Q.K. , Annuryanti F. , Kamadjaja D.B. , Nurkanto A. , Purwati  , Hariyadi D.M.
Published: February 2025

Bone fractures must undergo a complex healing process involving intricate cellular and molecular mechanisms. They require a suitable biological environment to restore skeletal stability and resolve inflammation. Scaffolds play a vital role in bone regeneration, thus reducing disease burden. Autologous bone graft represents the gold standard of therapy. However, its application is limited due to various reasons. Nanotechnology, in the form of nanomaterials and nano-drug delivery systems, has been proven to increase the potency of active substances in mimicking extracellular matrix (ECM), thereby providing physical support benefits and enhancing therapeutic effectiveness. Various materials, including protein, metal oxide, hydroxyapatite, and silica are modified with nanoparticle technology for the purposes of tissue regeneration therapy. Moreover, the properties of nanomaterials such as size, seta potential, and surface properties will affect their effectiveness in bone regeneration therapy. This review provides insights that deepen the knowledge of the manufacturing and application of nanomaterials as a therapeutic agent for bone regeneration.
Relationship between resting augmentation index and spontaneous cardiac baroreflex sensitivity during handgrip exercise in postmenopausal women
Authors: Prodel E. , Moreira M.F.S.C. , Gondim M.L. , Rocha H.N.M. , Mira P.A.C. , Nobrega A.C.L.
Published: February 2025

The stiffening of the conductance arteries is a hallmark of ageing and increases drastically after menopause. Therefore, the augmentation index (AIx), a surrogate for arterial stiffness, could be related to the decline in baroreflex sensitivity. We sought to investigate the relationship between resting AIx and spontaneous cardiac baroreflex sensitivity (cBRS) during handgrip exercise in ageing women. Thirteen young women (YW: 24±5 years; 24±2 kg/m2) and nine postmenopausal women (PMW: 60±5 years; 26±3 kg/m2) underwent the protocol, which consisted of 10 min of supine resting followed by 3 min of static handgrip exercise at 40% of the maximal voluntary force. The AIx was provided by the aortic pressure waveform and cBRS was calculated using the sequence technique, and vagal activity was accessed via heart rate variability using the root mean square of successive differences (RMSSD) index. Resting AIx was higher in PMW compared to YW (YW: 8±10%; PMW: 23±8%; P<0.01), while the cBRS (YW: 16±12 ms/mmHg; PMW: 10±5 ms/mmHg; P=0.08) and RMSSD (YW: 46±35 ms; PMW: 34±12 ms; P=0.26) were similar in YW and PMW. At rest, there was no significant (P>0.05) relationship between the AIx and cBRS in YW and PMW. However, in PMW, a negative (slope=-0.22) and strong (r=-0.70; P=0.03) relationship was observed between AIx and cBRS for the increment of blood pressure during the handgrip exercise. The stiffening of the arterial tree is one possible mechanism to explain the decrease of spontaneous cardiac baroreflex sensitivity during exercise in postmenopausal women.
Avaliação dos cursos do programa multicêntrico de qualificação profissional em atenção domiciliar a distância: características dos cursos e recursos educacionais
Authors: Colussi Claudia Flemming , Gasque Kellen Cristina da Silva , Savassi Leonardo Cançado Monteiro , Verdi Marta , Ferreira Diego Diz , Hellmann Fernando , Santos Luana Silvestre Pereira dos , Charneski Eliane Ricardo , Baibich Maria Esther Souza
Published: February 2025

Resumo Introdução Em 2019 foi desenvolvida uma pesquisa avaliativa do Programa Multicêntrico de Qualificação Profissional em Atenção Domiciliar a Distância (PMQPAD), na qual foram avaliadas as “Características dos cursos e recursos educacionais”. Objetivo Apresentar os resultados da pesquisa avaliativa do PMQPAD, discutindo a importância da formação profissional em Atenção Domiciliar para o SUS, no contexto da Educação Permanente em Saúde. Método Trata-se de uma pesquisa avaliativa quali-quantitativa com triangulação dos dados obtidos por meio da análise documental, entrevistas, formulários eletrônicos e bases de dados secundários. Participaram da coleta de dados 31 tutores, 22.900 alunos concluintes e 8.514 evadidos, além dos três gestores do programa e seis coordenadores de cursos. Resultados Como resultados positivos, destacam-se a contextualização dos cursos com a realidade, a qualidade dos materiais didáticos, a comunicação dos alunos com os tutores e as estratégias pedagógicas utilizadas. Como pontos negativos, observaram-se falta de apoio institucional aos profissionais para realização dos cursos e falta de acessibilidade dos cursos para pessoas com necessidades especiais. Conclusão A convergência das diferentes fontes de dados reforçou os resultados encontrados, que apontam caminhos para a formação dos profissionais de saúde no contexto do SUS.
Hierarquização fuzzy para tomada de decisão de priorização no investimento de saneamento básico nos municípios do estado do Rio de Janeiro
Authors: Bachá Leonardo , Ventura Rodrigo , Seabra Jean , Nacif Junior , Andrade Gustavo , Barrios Maria , Thompson Fabiano , Cosenza Carlos
Published: February 2025

Resumo Introdução A importância dos serviços de saneamento é justificada em particular no estado do Rio de Janeiro pelo caos na gestão dos recursos hídricos. Objetivo Realizar uma hierarquização de prioridade na escolha do tratamento de esgoto em municípios do Rio de Janeiro com variáveis que indicam situação do saneamento atual e a riqueza dos mesmos. Através desta classificação, comparações com outros tipos de rankings, como o ABES e o IDSC, foram feitas. Método Através de Inferência Mamdani baseada na Lógica Fuzzy, elaborou-se um peso gravitacional para compor esta hierarquização, que agrega o resultado de saída gerado pela inferência à dimensão de mortes por doenças de veiculação hídrica e à distância da capital, o maior polo de atração do estado. Resultados Como consequência, cinco Grupos de Prioridade foram organizados em ordem decrescente do status da situação atual do tratamento de efluentes em aglomerados urbanos postos em evidência junto dos Rankings ABES e IDSC. Conclusão Muitas das cidades sequer aparecem nos Rankings citados e a priorização obtida demonstra o grau de urgência de investimentos no setor de saneamento por todo ao longo do estado, com uma maior preocupação em municípios com problemas já conhecidos, como Duque de Caxias, Queimados, Nova Iguaçu e Rio de Janeiro.
Gynura procumbensin vitro adventitious root nanohydrogel improves inflammation-proliferation transition in second-degree burn healing
Authors: Zubaidah U. , Manuhara Y. S. W. , Aminah N. S. , Rohmatika A. U. , Nurbani F. A. , Safitri M.
Published: February 2025

Abstract Inflammation-proliferation transition plays a key role in the successful healing of a common burn type, second-degree burn. Gynura procumbens in vitro adventitious root nanohydrogel is currently being studied for its immunomodulatory to improve reparative environment. Root production and nanohydrogel preparation was done respectively by in vitro propagation and emulsion/ solvent diffusion with carbomer as a polymer. Characterization of nanohydrogel was performed afterward. An in vivo study was carried out in Balb/c mice having second-degree burns at different time and space. In vitro adventitious root was induced from leaf explant under indole butyric acid plant growth regulator (PGR). Rapid propagation was done through liquid culture. Upon formation into nanohydrogel (Gr-nh), it had a sphere shape with 6.88 nm in size and a PDI value of 0.16. Interaction among extract and polymer was proven by shifting in hydroxyl, alkene, and vinyl ether groups. Loading efficiency and loading amount were 99.99% and 56.39%, respectively. The percentage of release increased in line with pH (4-6). The pH of Gr-nh was 6.58 with spread diameter 8.83 ± 0.29 cm. Four days after the burn, Gr-nh showed a swift decline in local IL6 (116.1 pg/ml, p=0.0005), reduced levels of local (18.97 ng/l, p=0.69) and systemic (8.83 ng/l, p=0.0028) PGE2, and elevated local VEGF (343.6 ng/l, p=0.0005) compared to the control. By day 10, systemic IL6, as well as local and systemic PGE2 levels in Gr-nh, were notably lower compared to all treatments. Meanwhile, local VEGF remained elevated and significantly different from all other groups. Gr-nh showed better IL6 and PGE2 reduction than free extract during the inflammation stage and better VEGF enhancement than free extract in the proliferation stage. Pearson correlation analysis suggests that Gr-nh aids in coordinating IL6, PGE2, and VEGF spatially and temporally to optimize burn healing.
Governança multinível em países federativos: análise do desempenho municipal da assistência social no Brasil1
Authors: Bichir Renata Mirandola , Simoni Junior Sergio , Peres Ursula Dias
Published: February 2025

A partir das lentes da governança multinível, este artigo contribui para o debate acerca das consequências do federalismo brasileiro sobre as políticas sociais, focando no Sistema Único de Assistência Social (SUAS). Metodologicamente, o artigo inova ao analisar indicadores de desempenho dessa política no âmbito municipal, baseado em modelos de regressão multinível, com variáveis explicativas referentes à governança orçamentária, às capacidades estatais e interações socioestatais dos níveis vertical e horizontal, bem como dimensões locais, além de controles socioeconômicos e demográficos. Os municípios brasileiros são nossa unidade de análise, e o ano final do Pacto de Aprimoramento da Gestão Municipal, 2017, é a referência temporal. Os resultados indicam a importância dos diferentes níveis para explicar a performance municipal na provisão dos serviços da assistência social e, particularmente, especificam o espaço decisório dos entes subnacionais em uma política pública nacionalmente regulada, permitindo abrir novas linhas de investigação.
The impact of mentoring on the training of dentistry academics at the Federal University of Paraná
Authors: PUPO Yasmine Mendes , FAGHERAZZI Eduarda , MAGALHÃES Luiza Iaizzo , ALVES Isadora , RODRIGUES Thainá Larsen , ROCHA Alana Silveira , TAFFAREL Júlio César
Published: February 2025

Abstract Introduction Mentoring is a dynamic process aimed at facilitating the exchange of experiences and knowledge between a mentor and a mentee across professional, academic, and personal domains. Due to the scarcity of articles on mentorship within the Brazilian context, particularly in the field of Dentistry, this study aims to evaluate the impact of mentorship provided by the Tutorial Education Program (PET) to undergraduate Dentistry students at the Federal University of Paraná (UFPR). Objective To assess the impact of mentorship on the personal and professional development of undergraduate Dentistry students. Material and method This research was conducted during the XVI PET Circuit, an annual event of the PET group, utilizing specific questionnaires tailored for mentors and mentees. These questionnaires comprised multiple-choice questions utilizing the Likert scale, as well as open-ended questions. In total, this pilot study garnered 31 responses. Result Data were analyzed, and responses were extracted and classified into three primary themes: (1) Benefits of mentorship; (2) Advocacy for the importance of the mentorship program; and (3) Barriers to engagement. Both mentors and mentees classified the activity as beneficial, with few or no negative aspects identified. Conclusion Limitations of the study include the analysis of only one edition of a traditional activity, resulting in a small number of participants involved in the research.
EVALUATION OF SPRAY NOZZLE WEAR UNDER FIELD CONDITIONS
Authors: Baio Fábio H. R. , Oliveira Job T. de , Santos Luiz A. M. , Cunha Fernando F. da , Teodoro Paulo E.
Published: February 2025

ABSTRACT This study aimed to evaluate the impact of wear on different models of hydraulic ceramic spray nozzles focusing on changes in flow rate and the droplet size distribution in applications by medium-scale farmers in the agricultural region of Mato Grosso do Sul. Additionally, the study assessed the adequacy of nozzle replacement practices in accordance with recommended guidelines. Seven hydraulic ceramic nozzle models —JA3, AD/D 11002, BD 11002, JCI 80025, AXI 11003, CVI 110025, and AVI 11002—were tested. Nominal flow rates for each nozzle model were measured following ISO 10625 standardization criteria. The evaluated parameters included nominal flow rate, volumetric median diameter (VMD), relative span, and the percentage of the volume composed of droplets smaller than 100 µm (P<100). Prolonged use of hydraulic spray nozzles resulted in increased flow rates and modifications to droplet population characteristics, especially in the variation of the volume percentage of droplets smaller than 100 µm, which are more susceptible to drift. Although wear affected the volumetric median diameter, the change was not substantial enough to alter the droplet size classification.
Objetos matemáticos que configuran la noción de volumen
Authors: Caviedes Sofía , Morales-Ramírez Guadalupe , Pino-Fan Luis R.
Published: February 2025

Resumen En el presente artículo desarrollamos un estudio histórico-epistemológico a fin de caracterizar los significados parciales de la noción de volumen, y sus ideas epistémicas fundamentales, en tanto objeto complejo de las matemáticas. Para ello, se sigue un análisis de contenido de corte cualitativo y se utilizan herramientas del Enfoque Ontosemiótico del Conocimiento y la Instrucción Matemáticos como marco teórico-metodológico. Los resultados sugieren cuatro significados parciales de volumen que, en su conjunto, dan cuenta del significado global de tal objeto matemático: 1) volumen como espacio que ocupa un cuerpo en relación con otros objetos, susceptible de ser medido; 2) volumen como relación entre dimensiones y formas; 3) volumen en relación con los indivisibles; y 4) volumen como una función. El análisis histórico, y la caracterización de los significados parciales del volumen, han puesto de relieve la presencia de ideas epistémicas fundamentales que trascienden las diferentes configuraciones epistémicas, pudiendo favorecer la representatividad y la conexión de los significados de volumen.
Pesquisas envolvendo Artes no Programa de Pós-Graduação em Educação Matemática (PPGEM/UNESP)
Authors: Silva Ricardo Scucuglia Rodrigues da
Published: February 2025

Resumo Neste artigo discutimos pesquisas envolvendo Artes desenvolvidas no âmbito do Programa de Pós-Graduação em Educação Matemática da Universidade Estadual Paulista “Júlio de Mesquita Filho” (PPGEM/UNESP). Na introdução explicitamos uma concepção sobre Artes, reconhecendo a problemática filosófica acerca da busca por tal definição. Na seção 2, apresentamos uma revisão de literatura composta por 12 trabalhos que envolvem Artes defendidos no PPGEM/UNESP (8 dissertações de mestrado e 4 teses de doutorado). Tais trabalhos são classificados em 4 eixos: Etnomatemática, Geometria, Performance Matemática Digital (PMD) e Outras Perspectivas. Na seção 3 discutimos inicialmente projetos de pesquisa desenvolvidos por docentes do PPGEM/UNESP nos quais as Artes são temáticas protagonistas. Tais projetos possuem como perspectivas fundamentais as noções de PMD e Experiência Matemática Estética. Abordamos de maneira específica questões sobre produção musical. Ainda na seção 3 discutimos trabalhos nos quais as Artes são exploradas por meio de investigações sobre vídeos digitais/cinema e/ou por elementos estéticos emergentes na atividade acadêmica filosófica, pautadas principalmente na Filosofia da Diferença. Com base nos trabalhos analisados, tecemos na seção 4 reflexões sobre o papel das Artes no ensino e aprendizagem de matemática e no fazer pesquisa em Educação Matemática. Concluímos que, embora existam linhas de pesquisa consolidadas sobre Artes em Educação Matemática e os trabalhos desenvolvidos no PPGEM/UNESP sejam expressivos nessas consolidações, há necessidade do desenvolvimento de mais estudos acerca dessa temática, inclusive que explorem outras formas/linguagens, ações e visões sobre Artes em diversificados níveis de ensino e de produção científica.