bluuebunny/crossref_metadata_2025 huggingface dataset:
Improvement of centerless grinding process. Part 2. Initial data and design stage
Authors: Nepogozhev A.A. , Mokritsky B.Ya. , Anikin V.N. , Skripilev A.A. , Maryin S.B.
Published: June 2024

The need to process hard-to-process corrosion-resistant stainless steels such as steel grade 12Kh18N10T is growing sharply due to the growing demand for such steels. There was a demand for high-performance grinding of blanks of parts made of such steels. The paper discusses the features and results of the development of an abrasive tool for centerless grinding of one of these parts. The possibility of designing and/or selecting abrasive tools for rational and efficient grinding without cauterization with the required accuracy and roughness of processing has been established. Appropriate recommendations have been developed that reduce the complexity of designing (selecting) an abrasive wheel from 1.5 hours to 2 minutes and reduce the defect of parts to 0.1 % due to surface burns and the error of the obtained part dimensions.
Postmodern Approach to History in the Novel "Selvitë E Tivarit" by M.Kraja
Authors: Kalo Valbona
Published: June 2024

This study article aims to analyze the special way through which the important events of the historical past are integrated into the fiction of the writer Mehmet Kraja with the aim of ironizing and not documenting them. Our main argument is that in the novel "Selvitë e Tivarit" the historical context of the Tivari War is effectively portrayed through postmodern narrative tools and techniques, which highlight doubt and unreliability towards references and the absolute authenticity of historical narratives. The use of techniques such as the presence of a "dubious" narrator's voice, fragmentation, time distortion, ironic representation, etc., appear as postmodern strategies that play an important role in blurring the boundaries between reality (truth) and fiction and enable the thematization of important issues of history, culture, and human and national identity. Our methodology includes the use of analysis methods, which will enable us to delve into the interior of the text, at the levels of narration and discourse, as well as the comparative method to highlight the differences and commonalities between traditional and contemporary models of historical fiction.
Detekcija objekata s pomorskih nadzornih kamera
Authors: Pobar Miran
Published: June 2024

Automatska detekcija objekata u moru na slikama nadzornih ili panoramskih kamera otvara mogućnost automatskog praćenja prometa, detekcije neovlaštenoga kretanja, opasnosti ili onečišćenja. U ovom radu analiziraju se performanse modela temeljenih na arhitekturi YOLOv7 za zadatak detekcije plovila i plutača na takvim slikama. Modeli su naučeni na vlastitom skupu podataka različitih pomorskih scena izrađenom za tu svrhu, korištenjem prijenosa učenja s modela naučenih na općenitim slikama. Također, ispitane su dvije varijante rukovanja ulazom u mrežu, te je korištenje strategije rezanja ulazne slike značajno poboljšalo rezultate detekcije posebno malih objekata u odnosu na osnovni model.
Resenha de artigo de revisão sobre estressores psicossociais específicos de gênero que influenciam a saúde mental em mulheres atletas de elite e semi-elite
Authors: Celestino Sabrina
Published: June 2024

Introdução: Como parte da Edição Especial de 2023, a Revista de Educação Física / Journal of Physical Education (REF/JPE) apresenta aos leitores produções científicas, presentes na literatura recente, relacionadas à saúde no esporte de alto rendimento.
Objetivo: Apresentar e indicar a leitura do estudo de Pascoe et al. sobre os estressores psicossociais específicos de gênero na saúde mental de mulheres atletas de elite e semi-elite aos leitores da Revista de Educação Física/Journal of Physical Education (REF/JPE).
Desenvolvimento: Os autores argumentam que as mulheres atletas de elite e semi-elite correm, particularmente, o risco de sofrer problemas e distúrbios de saúde mental. Trata-se de uma revisão de narrativa cuja metodologia adotada abrangeu estudos revisados por pares até abril de 2022, publicados em livros, periódicos e relatórios. Como resultado o artigo reporta estressores psicossociais específicos de gênero alocados em: nível interpessoal, organizacional/estrutural e sociocultural.
Conclusão: As mulheres atletas de elite e semi-elite estão expostas a uma série de fatores de estresse psicossociais específicos de gênero, que as coloca em um risco particular de sofrer problemas de saúde mental e de desenvolver transtornos mentais, considerando o fato de que estão mais propensas a sofrer algumas formas de violência e as desigualdades de gênero que prevalecem na estrutura e na cultura desportiva em todos os níveis.
Book Review: Visual Secrets for School Success
Authors: Freeman Paul B.
Published: June 2024

Book Review
DESEMPENHO E AVALIAÇÃO DE CARCAÇA DE FÊMEAS SUÍNAS MESTIÇAS (DUROC X PIAU) SUPLEMENTADAS COM RACTOPAMINA
Authors: Carvalho Yanne Cibelle Vieira de , Lima Adiel Vieira de , Holanda Mônica Calixto Ribeiro de , Holanda Marco Aurélio Carneiro de , Dutra Júnior Wilson Moreira , Barbosa Elys de Barros , Cordeiro Maria Agda da Silva
Published: June 2024

Objetivo: Foi realizado um experimento afim de avaliar o desempenho e rendimento de carcaça de suínos mestiços, em fase de terminação, recebendo dietas com suplementação de cloridrato de ractopamina como repartidor de nutriente. Métodos: Foram utilizadas 20 fêmeas suínas Duroc x Piau, com peso inicial de 90,6 ± 5,35 kg, distribuídos em delineamento inteiramente casualizado, com dois tratamentos (níveis 0 e 10 ppm de ractopamina) e 10 repetições. O período experimental foi de 28 dias. Os parâmetros de desempenho avaliados foram: peso final, ganho de peso médio diário, consumo de ração médio diário, consumo de lisina digestível e conversão alimentar. Para as variáveis de avaliação e rendimento de carcaça, foram avaliados: espessura de toucinho, profundidade de musculo, área de olho de lombo, rendimento de carcaça quente e fria, rendimento de carne magra e dos principais cortes cárneos. Resultados: Em dietas com suplementação de ractopamina (RAC) foi observado uma melhora sobre o desempenho dos animais, como maior consumo de lisina digestível diário (CLD) e a conversão alimentar (CA). Também houve melhora sobre as características de carcaça, diminuindo a espessura de toucinho e aumentando a profundidade do músculo, bem como a área de olho de lombo. As demais variáveis avaliadas não foram influenciadas pela adição de RAC na dieta. Conclusão: O nível de 10 ppm de RAC otimiza o desempenho dos suínos em terminação e melhora as características quantitativas de carcaça.
REUSE OF PET BOTTLES AS ENVIRONMENTAL ENRICHMENT FOR BROILER FARMING
Authors: Ricci Gisele Dela , Andrade de Sousa Graziela Rigolin de Almeida , Campos José Ricardo Santini , Spedo Izabela Dacal , Rodrigues Nezio Ketrin Lany , Praça Leticia de Sousa , Miranda Junior Edson Lazaro Miranda Junior , Martins Airton , Parazzi Larissa José
Published: June 2024

Objective: This study was to evaluate the chickens' interest behavior for PET bottles, 12 colored balls and nests with perches. Method: 7.200 thousand broiler breeders and 6.000 13 thousand broilers were used. PET bottles and colored balls were used as environmental 14 enrichment for broilers and bottles and nests with perches for broiler breeders. Collection 15 campaigns were carried out in the productive units (field and slaughterhouses). 16 Transparent PET bottles, sanitized, with caps, without holes in sizes between 1.5, 2 and 17 2.5 liters were inserted in the field. The bottles were positioned at eye level of the animals 18 and inside them liquids with the colors blue, yellow and red were inserted. Results: It 19 was found that broilers sought enrichments in the morning and afternoon periods equally 20 statistically. It was observed that the objects were sought more frequently at 14 days of 21 age and less sought at 3 days of age. For broilers and broiler breeders, the preference for 22 colors was yellow, blue and red on the days evaluated. For broiler breeders, 23 environmental enrichments were sought more frequently at 43 days of age and less sought 24 at 47. Conclusion: The PET bottles as well as balls are objects that can be used as 25 environmental enrichment given the interest shown by the chickens.
UTILIZAÇÃO DE ADITIVOS NA DIETA DE LEITÕES DESMAMADOS
Authors: Lopes Idael Matheus Góes , Lima Marcelo Dourado de Lima , Santos Lesleyane Dâmaris Teixeira , Santos Luisa Lopes da Rocha dos , Filho Celmo Guedes Sant'Ana , Silveira Naiara Cristina dos Santos , Souza Artur Cavalcanti de , Gonçalves Larissa Moreira , Ramos Luiza de Almeida , Ferreira Walter Motta
Published: June 2024

Objetivo: A presente revisão teve por objetivo reunir informações acerca do uso de aditivos na alimentação de leitões desmamados e seus benefícios. Utilizou-se abordagem exploratória, com pressupostos da pesquisa bibliográfica e documental visando a redação de uma revisão bibliográfica relacionada ao uso de aditivos na suinocultura por meio da consulta em artigos científicos e teses nas bases Scielo, Google Acadêmico, Science Direct e PubMed. O desmame é considerado um período crítico na vida dos leitões em função da ocorrência de condições estressantes como, manejo, sociais, ambientais, e que juntos com a imaturidade dos sistemas digestivo e imunológico ocasionam distúrbios gastrointestinais e perturbação da microbiota. Os desafios do desmame podem levar à desregulação homeostática, aumentando a permeabilidade da mucosa intestinal. Logo, a utilização de aditivos na dieta como os ácidos orgânicos, probióticos, prebióticos, óleos essenciais e enzimas exógenas visam minimizar os efeitos negativos desse período, influenciando positivamente no ganho de peso, conversão alimentar, na saúde intestinal e na resposta imunológica dos leitões. Os aditivos possuem mecanismos específicos de ação, contribuindo para a saúde e o desempenho dos animais durante o desmame. O uso de aditivos como os ácidos orgânicos, probióticos, prebióticos, óleos essenciais e enzimas exógenas tem potencial para mitigar os efeitos deletérios do desmame, e como consequência potencializar o potencial produtivo dos animais, culminando em melhor desempenho zootécnico.
PERFIL DE RESISTÊNCIA ANTIMICROBIANA DE ENTEROBACTÉRIAS ISOLADAS DE CAMA DE AVIÁRIO UTILIZADA NA CRIAÇÃO DE FRANGOS DE CORTE
Authors: Palhano Rayanne Hissamy Gomes , do Nascimento Sara Eduarda Moreira , de Jesus Greiciene dos Santos de Jesus , Gomes Filho João Soares , Carneiro Maria Inez Fernandes , Dias Helder Luís Chaves , Lima Francisco Carneiro , Bezerra Danilo Cutrim , Teles Amanda Mara , Bezerra Nancyleni Pinto Chaves
Published: June 2024

Objetivou-se com o estudo avaliar o perfil de resistência antimicrobiana de enterobactérias isoladas de instalações de frango de corte. Método: Para isso, foram utilizadas 78 isolados bacterianos confirmadas como pertencentes a 11 espécies de enterobactérias, assim distribuídas: Enterobacter georgivae (n= 26); Klebsiella oxytoca (n= 12); Escherichia coli (n= 10); Serratia liquefaciens (n= 8); Enterobacter sakazakii (n= 6); Klebsiella pneumoniae (n= 6); Escherichia hermani (n= 2); Klebsiella ozaenae (n= 2); Enterobacter cloacae (n= 2); Serratia sp. (n= 2); e, Citrobacter koseri (n= 2). Os testes de resistência aos agentes antimicrobianos foram realizados pelo método de difusão em disco em que foram utilizados 10 antimicrobianos representativos das classes das penicilinas (penicilina G - 10μg; ampicilina com subactam - 10μg); cefalosporinas (cefepime - 30μg; cefatoxima - 30μg; cefoxitina - 30μg; cefadroxil - 30μg; ceftriaxona - 30μg); macrolídios (azitromicina - 15μg); quinolonas (ofloxacina - 5μg); e, carbapenêmicos (ertapenem - 10μg). Os isolados foram classificados como sensível, sensível com exposição aumentada (intermediária) e resistentes aos princípios antimicrobianos avaliados e classificados os fenótipos com resistência múltipla as drogas testadas (MDR). Resultados: As enterobactérias apresentaram elevados percentuais de resistência aos antibióticos testados da classe das cefalosporinas - ceftriaxona (90,90%), cefepime (90,90%), cefoxitina (81,82%), cefadroxil (72,73%) e cefatoxima (63,34%); carbapenêmicos - ertapenem (81,82%); e, das penicilinas - penicilina G (72,73%), o que sugere contaminação ambiental e/ou possível uso desses antimicrobianos na criação avícola. Verificou-se, no estudo, que os isolados apresentaram o seguinte perfil de multirresistência: (i) 10 antimicrobianos – 38 isolados; (ii) oito antimicrobianos – 2 isolados; (iii) seis antimicrobianos – 10 isolados; e, (iv) cinco antimicrobianos – 20 isolados. Apenas oito isolados integrantes da espécie S. liquefaciens não apresentaram multirresistência no presente estudo. Conclusão: Os isolados de enterobactérias avaliados apresentaram perfil de resistência múltipla a antibióticos mais antigos (penicilinas), de amplo espectro (cefalosporinas - ceftriaxona e cefatoxima) e de última linha (carbapenêmicos). Os resultados do presente estudo reforçam a importância do monitoramento constante do perfil de resistência bacteriana em diferentes pontos da cadeia produtiva de frangos de corte, inclusive instalações e cama de aviário.
COMPLEXO HOMEOPÁTICO EM DIETAS DE FRANGOS DE CORTE
Authors: Simões João Vitor Morais , Borges João Pedro Terra Prado , Rodrigues Selma Alves , Laginestra Bruna de Fatima Antunes , Meskiv Patrícia Wynnek , Almeida Maria Clara Guarnieri de , Silveira Francielly Cristina Teoro da , Silva Guilherme Carnelocci , Gazim Zilda Cristiani , Piau Junior Ranulfo
Published: June 2024

Objetivo: O estudo foi realizado com o objetivo de avaliar o efeito da suplementação de um complexo homeopático sobre o desempenho zootécnico de frangos de corte. Métodos: Foram utilizados 10 aviários de 4 propriedades rurais da região do oeste e noroeste do Paraná, Brasil constituindo de 5 grupos (G1, G2, G3, G4 e G5). Em cada grupo foram utilizados dois aviários próximos iguais da mesma propriedade, um grupo tratado com complexo homeopático na água e outro grupo controle, os aviários utilizados em cada experimento tinham as mesmas dimensões, todos os animais eram da linhagem Cobb, misto, em cada grupo deste estudo as aves foram alojadas e abatidas no mesmo período. Foi adicionado na água diariamente 0,5L do complexo homeopático em 1000L de água, durante 42 dias, no período da manhã. Foram avaliados os seguintes parâmetros: peso médio final (PF), ganho de peso diário (GPD), conversão alimentar (CA), conversão alimentar ajustada (CAA), valor em reais por ave (valor). Os dados foram submetidos à análise de variância e as médias foram comparadas pelo teste t a 5%. Resultados: Todos os parâmetros avaliados em todos os experimentos foram observados diferenças estatisticamente significativas. Foi observado que o complexo homeopático adicionado na água dos animais aumentou o peso médio final, ganho de peso diário e valor em reais por ave, melhorou a conversão alimentar e a conversão alimentar ajustada. Os experimentos G1, G2, G3, G4 e G5 tiveram um aumento na receita bruta no grupo complexo homeopático de 30,06%, 22,57%, 33%, 36,01% e 16,7%, respectivamente. As mortalidades médias nos experimentos foram de 6,30% no grupo complexo homeopático e 6,80% no grupo controle. Conclusão: O uso da homeopatia melhorou os parâmetros zootécnicos avaliados quando comparados com o grupo controle, o uso da homeopatia pode ser uma boa opção na produção de frangos de corte, com as vantagens de não deixar resíduos, não ter efeitos colaterais, não provocar resistência aos parasitas e microrganismos e pode ser usado nos sistemas de produção orgânica.
Human-Computer Interaction in Cloud Systems
Authors: Pandey Pawan , Kaur Kiranpreet , Thakhur Surendra , Negi Shubham , . Devam
Published: June 2024

As cloud computing continues to revolutionize the landscape of modern computing, the intersection of human-computer interaction (HCI) within cloud systems has become increasingly vital. This study aims to explore and analyze the evolving relationship between HCI principles and cloud computing environments. It investigates the various dimensions of HCI in cloud systems, encompassing user experience design, interface usability, accessibility, and collaboration paradigms. The paper begins by providing a comprehensive overview of HCI fundamentals, emphasizing their significance in the context of cloud computing. It delves into the unique challenges and opportunities presented by cloud environments, such as distributed computing, virtualization, and scalability concerns, and examines their implications forHCI design. Furthermore, the study investigates contemporary HCI methodologies and techniques tailored specifically for cloud systems, including adaptive interfaces, multi-platform compatibility, and responsive design principles. It discusses how these approaches aim to optimize user interaction, enhance productivity, and facilitate seamless user experiences across diverse devices and environments.
Investigation of the Effect on the Mechanical Properties of Gun Body Produced from Three Different Alloy Steel by Hot Forging Method at Three Different Temperatures
Authors: Debre Ali , Bayram Ali
Published: June 2024

Forging production method is a preferred production method compared to other production methods in terms of high mechanical properties of the product. In the forging production method, production can be made using materials of different qualities. In addition, one of the areas of interest in the forging sector in recent years is the studies on the malleability of alloy steels. The use of alloy steels can show superior properties especially in terms of strength and machinability. In this study, gun bodies were produced from three different alloy steels (41Cr4, 42CrMo4 and AISI420) at different forging temperatures (800°C, 950°C and 1250°C). Hardness, microstructure, notch impact, tensile test and SEM examinations were carried out by taking samples from the gun body and their effects on mechanical properties were investigated. The data obtained as a result of the experiments were verified by microstructure and SEM examinations.
Exploring the Relationship between Home Economics Competencies and Financial Literacy among High School Learners
Authors: T. Reponte Rosemarie , D. Gallardo Remigilda
Published: June 2024

This study examined the relationship between Home Economics Competencies and Financial Literacy among high school learners, focusing on Grade 7 learners at Davao City National High School. Employing a descriptive correlational research design, the research utilized a survey method to collect data, with the sample selected through simple quota sampling. The survey measured learners ' competencies in various aspects of Home Economics, including practical skill application, integration of theoretical knowledge with practical execution, and adaptability to changing household dynamics, alongside their understanding and management of financial literacy. Statistical analysis of the data involved calculating mean scores, Pearson-r correlation, and conducting regression analysis. The findings revealed a significant positive correlation between Home Economics competencies and financial literacy (R: 0.59, p<0.05). Regression analysis further demonstrated the impact of specific components of Home Economics education on financial literacy levels. These results suggest that proficiency in Home Economics is closely linked to financial literacy, indicating that comprehensive education in Home Economics could enhance learners ' financial understanding and capabilities. The study highlights the importance of integrating Home Economics and financial education to equip learners with essential life skills for their future.
The Influence of Corporate Social Responsibility on Employee Performance with Organizational Commitment as Mediation
Authors: HERMAN Kharisma Deslia , ERLINA Rr , MARDIANA Nova
Published: June 2024

This research is to determine the effect of CSR on employee performance, CSR on organizational commitment, organizational commitment on employee performance, and is mediated by organizational commitment. The number of samples in this research is 210 samples, testing using the SEM test using the SEM-PLS analysis tool, the findings in this research There is that Corporate Social Responsibility (CSR) have a significant positive influence on Employee Performance. In addition, CSR also have a significant positive influence on Organizational Commitment. Organizational Commitment has a significant positive influence on Employee Performance. The latest findings show that Employee Performance has a significant positive influence, with Organizational Commitment as a mediating variable. the results about CSR showed that the lowest average scores were recorded on the assessment or evaluation indicators. To anticipate the spread of a similar response, companies need to identify the causes of this response. In the results of respondents, the lowest indicator of employee performance is the work quality indicator. Organizations must delve deeper into understanding the reasons behind the subpar quality of work observed within their operations. Within the spectrum of organizational Commitment, it is evident that the normative commitment indicator scores the least. Organizations need to cultivate a culture where employees feel intensely loyal. This can be done through employee development programs, appropriate incentives, and a supportive work environment.
The Multicomponent Fitting to the Star Formation Histories in the TNG Simulation
Authors: Wang 汪 Yang 洋 , Dong 董 Chenxing 辰兴 , Ruan 阮 Hengxin 恒心 , Lin 林 Qiufan 秋帆 , Zhang 张 Yucheng 宇澄 , Chen 陈 Shupei 树沛
Published: June 2024

The star formation history (SFH) is a key issue in the evolution of galaxies. In this work, we developed a model based on a Gaussian and gamma function mixture to fit SFHs with varying numbers of components. Our primary objective was to use this model to reveal the shape of SFHs and the corresponding physical driving factors. Specifically, we applied this model to fit SFHs from the TNG100-1 simulation. Our study led to the following findings. (1) Our model fits with TNG star formation histories well, especially for high-mass and red galaxies; (2) a clear relationship exists between the number and shape of fitted components and the mass and color of galaxies, with notable differences observed between central/isolated and satellite galaxies. (3) Our model allows us to extract different episodes of star formation within star formation histories with ease and analyze the duration and timing of each star formation episode. Our findings indicate a strong relationship between the timing of each star formation episode and galaxy mass and color.
The Advective Flux Transport Model: Improving the Far Side with Active Regions Observed by STEREO 304 Å
Authors: Upton Lisa A. , Ugarte-Urra Ignacio , Warren Harry P. , Hathaway David H.
Published: June 2024

Observations of the Sun’s photospheric magnetic field are often confined to the Sun–Earth line. Surface flux transport (SFT) models, such as the Advective Flux Transport (AFT) model, simulate the evolution of the photospheric magnetic field to produce magnetic maps over the entire surface of the Sun. While these models are able to evolve active regions that transit the near side of the Sun, new far-side side flux emergence is typically neglected. We demonstrate a new method for creating improved maps of the magnetic field over the Sun’s entire photosphere using data obtained by the Solar TErrestrial RElations Observatory (STEREO) mission. STEREO He ii 304 Å intensity images are used to infer the time, location, and total unsigned magnetic flux of far-side active regions. We have developed an automatic detection algorithm for finding and ingesting new far-side active region emergence into the AFT model. We conduct a series of simulations to investigate the impact of including active region emergence in AFT, both with and without data assimilation of magnetograms. We find that while He ii 304 Å can be used to improve surface flux models, care must taken to mitigate intensity surges from flaring events. We estimate that during Solar Cycle 24's maximum (2011–2015), 4–6 × 1022 Mx of flux is missing from SFT models that do not include far-side data. We find that while He ii 304 Å data alone can be used to create synchronic maps of photospheric magnetic field that resemble the observations, it is insufficient to produce a complete picture without direct magnetic observations from magnetographs.
Probing the Interstellar Medium from Scintillation of the Swooshing Pulsar B0919+06
Authors: Wang Z. , Wen Z. G. , Yuan J. P. , Wang N. , Wang Z. , Chen J. L. , Wang H. G. , Han W. , Wang H. , Duan X. F. , Lyu C. B. , Wang J. P. , Wu Z. W.
Published: June 2024

Radio observations of pulsars offer a potential method to probe the intricate microstructure in the turbulent interstellar medium. Here we report on a high-resolution dynamic spectral analysis of the “swooshing pulsar” B0919+06 observed with the Five-hundred-meter Aperture Spherical radio Telescope over multiple epochs and with the ultrawideband receiver on the Parkes radio telescope. For all observations, the dynamic scintillation spectra, two-dimensional autocovariance functions, and secondary spectra are presented. At 1250 MHz, the decorrelation bandwidth, diffraction timescale, and the drift rate are determined to be Δν

d
= 25.89 ± 7.55 MHz,

Δ

τ

d

=
14.42
±
3.98

minutes, and

dt
/
d
ν
=
0.07
±
0.14

minutes

MHz−1, respectively. The frequency dependencies of the scintillation parameters exhibit single power-law spectral behaviors, indicating that the electron density fluctuations in the interstellar medium approximately follow the Kolmogorov spectrum. The secondary spectra exhibit two distinct parabolic arcs with well-determined curvatures of 0.002 and 0.02 s3 for the outer and inner arcs, respectively. The locations of the scattering screens are approximately determined to be 157.3 and 726.0 pc, respectively, from the pulsar for isotropic scattering. The inner scintillation arc is present contemporaneously over a wide frequency range, indicating that the scintillation arc is a broadband phenomenon. The arc curvature scales with observing frequency as a power law with an index of −2.05 ± 0.05, which implies that the scattering screen spans a physical distance from 689.7 to 883.3 pc from the pulsar.
Do We Finally Know all Stellar and Substellar Neighbors within 10 pc of the Sun?
Authors: Scholz Ralf-Dieter , Mints Alexey
Published: June 2024

Our knowledge on the closest solar neighbors gradually improved over a long time with the help of new methods and the recognition of new stellar and substellar species. The latest burst of discoveries since 1997, in which the first author participated, seemingly filled the gap of missing systems within 10 pc from the Sun. However, previous estimates of the population relied on two assumptions: that the sample was complete within 5 pc and that the density was uniform out to 10 pc. The first of these is not true, and the second in question. Otherwise, up to about 90 systems could be still missing within 10 pc. We find no indication for missing brown dwarfs within 10 pc, but strongly increasing deficits from early-M to late-M dwarfs hint at some still hidden late-M dwarf neighbors. They may have already been detected by Gaia but published so far without or with incorrect parallax measurements, because of close companions or their location in the Galactic plane.
Geologic History of the Amundsen Crater Region Near the Lunar South Pole: Basis for Future Exploration
Authors: Wueller Lukas , Iqbal Wajiha , Frueh Thomas , van der Bogert Carolyn H. , Hiesinger Harald
Published: June 2024

We provide the first detailed 1:100,000 scale geomorphologic map of the ∼100 km Amundsen crater region, which is of high scientific relevance for future exploration, e.g., NASA’s VIPER mission, the Artemis program, and the Chinese International Lunar Research Station. We investigated the complex geological history of the region before and after the formation of Amundsen crater on the rims of the South Pole–Aitken (SPA) and Amundsen–Ganswindt basins. We present a new Amundsen crater formation age of ∼4.04 Ga, which, in contrast to previously derived ages, is based on non-light-plains terrain. The estimated maximum excavation depth for Amundsen crater is ∼8 km, and elevated concentrations of FeO near the crater suggest that Amundsen may have redistributed SPA-derived materials. Plains materials of various kinds were observed both inside and outside Amundsen crater and are estimated to be up to 350 m thick and ∼3.8 Ga old. A less cratered, tens of meters thick mantling unit indicates a resurfacing event ∼3.7 Ga ago. We highlight five potential exploration sites that satisfy technical constraints (such as shallow slopes, solar illumination, and Earth visibility), provide materials that can be sampled, and are capable of addressing multiple science objectives. Due to its accessibility and traversability, combined with its geologic diversity, proximity of permanently shadowed regions for studying volatile processes, and ability to address multiple science objectives, we confirm and reinforce the Amundsen crater region as a high-priority landing and exploration site.
An underwater imagery identification guide for shallow, mesophotic and deep-sea benthos in Maldives
Authors: Amjad Farah , Ahusan Mohamed , Amir Hana , de Villiers Nina , Gress Erika , Mah Christopher , Naeem Shafiya , Rico-Seijo Nuria , Samaai Toufiek , Afzal Maryiam , Woodall Lucy , Stefanoudis Paris
Published: June 2024

During the 2022 Nekton Maldives Mission, we deployed a variety of platforms (snorkelling, remotely-operated vehicles and manned submersibles) to conduct video surveys of the biodiversity and composition of shallow (< 30 m), mesophotic (30-150 m) and deep-sea (> 150 m) benthos found in the Maldives’ central and southern atolls. In total, ~ 80 hrs of stereo-video footage were collected during the benthic transect surveys, which were subsequently processed using annotation software in order to evaluate benthic biodiversity and community composition. Here, we present a photographic guide for the visual, in situ identification of reef benthos encountered, including corals, sponges and other invertebrates that inhabit Maldives’ nearshore habitats. We hope that this identification guide will aid future imagery-based surveys or observations of organisms during fieldwork.

A total of 283 morphotypes were identified, including those belonging to Octocorallia (61), Scleractinia (57), Porifera (38), Asteroidea (22), Antipatharia (15), Decapoda (13), Hydrozoa (12), Holothuroidea (10), Actiniaria (9), Echinoidea (8), Annelida (6), Chlorophyta (5), Gastropoda (4), Bivalvia (4), Ascidiacea (3), Crinoidea (3), Bryozoa (2), Cyanobacteria (2), Zoantharia (2), Cephalopoda (1), Ceriantharia (1), Corallimorpharia (1), Ctenophora (1), Ophiuroidea (1), Rhodophyta (1) and to an unknown category (1). Out of these, we identified 40 to species level, 120 to genus, 47 to family, 14 to order and suborder, 58 to class and subclass, two to phylum and one was of unknown phylum. This represents the first attempt to catalogue the mesophotic and deep-sea benthic megafaunal diversity in the Maldives using underwater imagery.
Histéresis y resiliencia en la vida cotidiana postpandemia en España
Authors: Alaminos Antonio , Alaminos-Fernández Paloma
Published: June 2024

La vida cotidiana en España ha experimentado, desde inicios de 2020, el impacto de las restricciones establecidas como consecuencia de la pandemia de coronavirus. Se presenta aquí un primer acercamiento empírico a las huellas que ha dejado en la vida cotidiana, midiendo resiliencia e histéresis en dos dimensiones, emocional y conductual. Se analiza la encuesta “Barómetro de junio de 2022” del CIS, estudiando cómo las modificaciones observadas en las formas de saludo interpersonal muestran la presencia de histéresis y resiliencia, estableciendo posteriormente su dependencia de variables como edad, género y riesgo percibido mediante la especificación de un modelo estructural de covarianzas. La edad, el género y el riesgo percibido muestran valor explicativo significativo de los fenómenos de histéresis y resiliencia. Finalmente, se confirman dos tipos de histéresis, emocional y conductual, así como la complementariedad teórica y empírica entre resiliencia e histéresis.
Recodificación de escalas tipo Likert a través de la clasificación no supervisada. Las implicaciones de las relaciones por Internet respecto a las relaciones presenciales como estudio de caso
Authors: Landaluce Calvo M. Isabel
Published: June 2024

Una de las decisiones más importantes en el diseño de un cuestionario es la elección de la/s escala/s de medición. Una escala habitual en preguntas sobre valoraciones u opiniones es la escala tipo Likert, que oscila entre el 0 o el 1 (peor valoración/desacuerdo) y el 10 (máxima valoración/acuerdo). Es frecuente que los investigadores decidan recodificar esta escala. En este contexto, se presenta un protocolo que facilita esta tarea de simplificación. La secuenciación metodológica integrada por el análisis factorial y el análisis de clasificación presenta varias ventajas. Además de permitir el tratamiento de la escala original desde dos ópticas, proporciona una recodificación óptima con la mínima pérdida de información. La aplicación a una pregunta extraída del estudio n.º 3325 del Centro de Investigaciones Sociológicas, relativa a las implicaciones de las relaciones por Internet respecto a las presenciales en tiempos de pandemia, pone de manifiesto la utilidad y versatilidad de la propuesta.
Crise sanitaire et nouvelles orientations de l’activité des enseignant·es-chercheur·es en question dans l’enseignement supérieur agricole
Authors: Loizon Anaïs , David Marie , Droyer Nathalie , Guidoni-Stoltz Dominique
Published: June 2024

Cet article s’intéresse aux traces laissées par le vécu de la crise sanitaire sur l’orientation de l’activité d’enseignant·es-chercheur·es à l’ère post-Covid. Il s’appuie sur une enquête exploratoire et compréhensive questionnant principalement, par entretiens semi-directifs, la part enseignante du métier de 18 enseignant·es-chercheur·es exerçant au sein des écoles d’ingénieurs et vétérinaires de l’enseignement supérieur agricole. L’activité des enquêté·es et son développement, suivant les évolutions successives des conditions de travail, sont explorés avec le cadre de l’analyse du travail en didactique professionnelle. Les résultats montrent le rôle joué par cette situation de travail en mouvement dans la redéfinition des buts d’enseignement et la prise en compte de nouvelles propriétés de la situation. Ce rapport renouvelé à la situation de travail se double d’un rapport renouvelé au métier que l’analyse des motifs permet d’esquisser. La période écoulée a ainsi constitué pour certain·es enseignant·es-chercheur·es une opportunité de réinterroger la part prise par l’enseignement dans la conduite de leur mission, conférant une orientation nouvelle à leur parcours professionnel.
Les pratiques citoyennes et la démocratisation de l’action publique en santé de proximité
Authors: Ruelland Isabelle
Published: June 2024

Dans les États sociaux occidentaux, citoyens et citoyennes jouent un rôle de plus en plus important dans la prestation de services de santé de proximité. Les pratiques citoyennes sont devenues des compléments essentiels aux actions de santé publique, en particulier dans les quartiers vulnérables de grandes villes où des pratiques portées par des citoyen·nes ont connu un rayonnement important, notamment depuis la pandémie de Covid-19. À partir d’une lecture croisée de certaines de nos recherches au Québec et au Brésil, cet article propose d’examiner empiriquement comment les pratiques citoyennes, les pratiques d’intervenant·es de proximité et leurs agencements peuvent représenter des vecteurs de transformation en agissant sur les inégalités sociales. Aujourd’hui plus que jamais, les pratiques citoyennes en santé de proximité, tout comme les personnes qui les mettent en œuvrent, sont précaires et peu reconnues. En somme, ces expériences invitent à s’interroger davantage sur les pratiques citoyennes comme activité de travail, c’est-à-dire à s’intéresser à leurs conditions d’émergence, leurs déploiements, les dynamiques qui s’y produisent et leur potentiel de transformation des inégalités instituées.
Le retour d’expérience des ingénieurs pédagogiques sur leur prise en charge de la crise sanitaire à l’université
Authors: Redondo Cécile
Published: June 2024

Nous analysons l’expérience d’ingénieurs pédagogiques (IP) afin de mieux comprendre leur vécu et leur ressenti concernant l’éventuelle transformation de leur activité professionnelle trois ans après le déclenchement de la pandémie de Covid-19. Une enquête par entretien a été réalisée auprès de dix IP qui étaient en poste dans des universités françaises au moment de la survenue de la crise sanitaire, en sollicitant un retour d’expérience sur les pratiques professionnelles mises en œuvre depuis mars 2020. Les résultats, produits selon une analyse thématique de contenu dans un cadre didactique, permettent de mettre en évidence plusieurs éléments saillants dont la forte capacité d’adaptation pour répondre aux besoins du public enseignant, l’évolution vers plus de visibilité et de reconnaissance institutionnelle et professionnelle, mais aussi la permanence des inégalités. Notre analyse objectivée avec le prisme de la théorie anthropologique du didactique permet de décrire le jeu des facteurs ayant impacté la réalisation et l’évolution des pratiques des IP interrogés.
Exploration des projets personnels postpandémiques de personnes conseillères d’orientation québécoises en réponse à leurs besoins de mieux-être au travail
Authors: Cournoyer Louis , Lachance Lise , Lacoursière Chloé
Published: June 2024

Durant la pandémie COVID-19, les conseiller·ères d’orientation (c.o.) ont accompagné des clientèles en situation de vulnérabilité. Cette période a été l’occasion d’adapter leurs pratiques, mais a pu les déstabiliser et entraîner des changements dans leurs conditions de travail. Elle a aussi offert l’opportunité de redéfinir et de redéployer des projets personnels pour favoriser leur mieux-être au travail. Cet article explore les projets personnels postpandémiques de c.o. Des entretiens semi-dirigés ont été menés auprès de 22 c.o. pour identifier leurs projets postpandémiques, ainsi que les besoins les motivant et les stratégies déployées pour les réaliser. Une analyse thématique a notamment fait ressortir cinq catégories de projets professionnels : continuité professionnelle ; ajustement de sens au travail ; mieux-être professionnel ; extension de ses activités ; valorisation et collaboration socioprofessionnelles. La pandémie ne semble pas avoir bouleversé leurs projets, mais avoir stimulé une réflexion sur leurs aspirations de mieux-être au travail de façon individuelle et collective.
A Swedish traveller in the Comoro Islands: The description of Anjouan/Nzwani by Christopher Henric Braad in 1750, translated and annotated
Authors: Franks† Jeremy , Cheke Anthony S.
Published: June 2024

Swedish merchant C.H. Braad’s illustrated description in 1750 of the rulers, people, crops, livestock and wildlife of ‘Johanna’ (Anjouan/Nzwani) in the Comoros is translated, with extensive annotations, from part of his manuscript account of a voyage to India on the Götha Leijon.
A Santa Sé e os projetos para reorganizar as dioceses na província eclesiástica de Cuiabá (1910 - 1927)
Authors: Marin Jérri Roberto
Published: June 2024

O objetivo deste artigo é analisar os projetos para reorganizar a província eclesiástica de Cuiabá, enfocando a proposta de extinção da diocese de Corumbá, de 1910, e a fusão dos territórios das dioceses de Corumbá e Cáceres, discutidas entre os anos de 1925 e 1927. Nesse contexto, a Santa Sé pretendia expandir o número de circunscrições eclesiásticas, mas as duas propostas estavam na contramão desse processo. Para o desenvolvimento desta pesquisa, utilizo as perspectivas da História Global e da Nova História Política, que contribuíram para uma compreensão mais aprofundada das práticas eclesiásticas, das representações políticas e dos aspectos socioculturais.
Geochemical and Experimental Investigations of some Egyptian Volcanic Tuffaceous Rocks as Natural Supplementary Cementitious Materials
Authors: El-Shafey Ramadan E. , Heikal Mohamed , El-Dsoky Hatem , Saleh Gehad Mohamed , Omar Ahmed Abubakr
Published: June 2024

Supplementary cementitious materials are additives that are used to improve the qualities of Portland cement while also reducing its environmental impact. The production of such blended cements relies on the regional availability of additional components. Despite the prevalence of volcanic tuffs in the Eastern Desert and South Sinai encountered in Egypt, there is a scarcity of knowledge regarding experimental research on cement manufacture. The main objective of this study is to analyze the geochemical and experimental characteristics of several volcanic tuffaceous rocks exploited as natural additional cementitious materials and their impact on the characteristics of the resulting blended cement. The partially replacement can play an important role in reducing the local environmental impacts (CO2 emissions). Various volcanic rock specimens have been collected from the Sinai (Wadi Kid) and the Eastern Desert (Gabal Umm Zarabit, Wadi Umm Khariga, Gabal Igla El-Iswid, and Abu Wassat), Egypt. The samples under study were examined for their mineralogy, petrography, and chemical composition in order to identify their specifications. In addition, a total of fifteen blended cement samples were produced by partially replacing clinker with the investigated samples. The substitution ratios used were 10%, 20%, and 25% by mass. A control mix was also designed, consisting of ordinary Portland cement without any other substances. An assessment has been conducted on the effects of partially replacing clinker with volcanic rocks on the characteristics of the resulting blended cement. The physico-mechanical parameters, including Blaine, setting time, flexural strength, and compressive strength, of the hardened blended mortars were measured at specific times (7 and 28 days). The study demonstrated that the strength of the studied blended cement mixes decreased as the fraction of the examined volcanic rocks to clinker ratio increased throughout the early stages. The highest compressive strength among the mixtures evaluated was achieved when using a 10% ratio of volcanic rocks as clinker replacement.
Sustainable Disposal of Different Solid Wastes as Aggregate for Fabricating Lightweight Concrete: Physio-Mechanical Performance and Durability
Authors: Heniegal Ashraf Mohamed , Amin Mohamed , Abdelaziz Nirmen , Tahwia Ahmed M.
Published: June 2024

It is crucial to utilize industrial waste and recycled bricks in concrete production, particularly in lightweight concrete, for the sake of sustainability. The objective of this investigation is to produce sustainable, durable, and structural lightweight concrete by replacing natural aggregates (dolomite and sand) with industrial waste (plastic waste) and recycled bricks (crushed lightweight bricks). Two groups of mixtures were conducted in which coarse plastic waste and coarse crushed lightweight bricks were used to partially and fully replace the coarse aggregate in the first group. In the second group, besides replacing the fine aggregate with fine crushed lightweight bricks, the coarse aggregate is also partially and completely replaced, respectively. This experimental work investigated how sustainable lightweight concrete performs in terms of dry density, compressive strength, resistance to chloride penetration, sorptivity, water permeability, and ecological impact. Based on experimental data, replacing aggregate reduced the density of lightweight concrete by up to 1400 kg/m3, lowered its compressive strength by up to 33.8 MPa upon complete replacement of the aggregate, and diminished carbon emissions by up to 2.05%. Compressive strength correlates directly with dry density and inversely with sorptivity and permeability. Investigations have concluded the potential for producing eco-friendly lightweight aggregate concrete suitable for sustainable structural applications.
Domination of India: Challenges and Opportunities for Regional Integration in South Asia
Authors: Kumarasingha K. A. Waruni
Published: June 2024

The absence of regional integration in South Asia has resulted in political, economic, and societal issues due to the interference of other powerful countries in international politics. As the regional power in South Asia, India has tremendous potential to promote regional integration. However, India's hegemonic power has caused controversial issues among South Asian neighbours, and regional integration has been further challenged. This research paper examines the challenges and opportunities for regional integration in South Asia, focusing on India's role in promoting regionalism. The study also conceptualizes the potential for regional integration in South Asia, identifying the key challenges and obstacles hindering its progress, such as political rivalries, security concerns, and economic disparities. This study is primarily based on secondary qualitative data derived from research papers, books, Journal articles, websites, meeting minutes and other web based publications. The collected data was analyzed by descriptive content analysis to address the central question of the study. The findings have emphasized that India plays a critical role in the success of regional integration in South Asia, given its size, economic potential, and geopolitical significance. However, India's domestic political and bilateral tensions, asymmetric economy, and constitutional challenges have been identified as the major drawbacks to regional integration under India's supremacy. Furthermore, economic cooperation, connectivity initiatives, and leadership at the SAARC have been identified as India's pervasive potential to promote and establish regional cooperation. The paper concludes by offering policy recommendations for promoting regional integration in South Asia, focusing on India's leadership role.
“Big Data Breaches”, sovereignty of states and the challenges in attribution
Authors: Gunatileka Shannel
Published: June 2024

“Big data” refers to large sets of data, which are computationally analyzed to reveal patterns or trends in human behavior and interactions. At present, with the increased use of cyberspace for day-to-day activities, sensitive personal data is stored in computer servers. This massive number of data sets could be used to generate predictive models for a variety of uses such as policy-making and the prediction of societal changes.  This has propelled nation-state adversaries to amass “big data” of another state through low-threshold data breaches. This article focuses on “big data breaches” committed by “state or state-sponsored groups”, involving a massive amount of data from victim states. For a cyber-attack to qualify as an “armed attack” or “use of force” under international law, it must satisfy the requirements of the “scale and effect” test. However, a big data breach would not satisfy this test and the attribution of the liability for lower-threshold cyber breaches has become a challenge. This is mainly because there is lack of consensus on the international law principles applicable to cyberspace. Nevertheless, big data breaches must be attributed, because it is an intrusion on state sovereignty, threatens security and results in economic loss. Qualitative research methodology was used to analyze state-sponsored big data breaches, the existing international legal framework, the drawbacks in attribution of such breaches and the need to push forth tailor-made laws for attribution of low-threshold big data breaches.