bluuebunny/crossref_metadata_2025 huggingface dataset:
Challenges of BIM Software Implementation in Quantity Surveying Consultancy Firms: The Difference Between Large Firms and Small-and-Medium Enterprises (SMEs)
Authors: Lee Yee Lin  , Khoo Terh Jing  , Ha Chin Yee  , Lee Ray Re
Published: December 2023

Inefficiencies and ineffectiveness in delivering construction projects had negatively impacted the industry for decades. However, the emergence of building information modeling (BIM) technology had influenced the construction process with its many benefits toward project success. BIM benefits included reduced project time and cost, improved team collaboration and communication, and improved project quality and performance. Consequently, BIM applications were claimed to provide more reliable working practices for quantity surveyors (QS), especially in establishing their cost estimates. Despite the well-known benefits that spurred BIM employment around the world, the usage of BIM software in Malaysia was still in its infancy, requiring greater deployment by the QS. Furthermore, the literature was scarce in comparing the use of BIM software by large organizations and Small-and-Medium Enterprises (SMEs). As a result, the primary goal of this study was to identify the numerous challenges associated with the adoption of BIM software in both large and SME quantity surveying consultancy firms. Apart from that, this paper identified the availability of BIM software in the construction sector as well as the use of BIM software in those consultancy businesses. A quantitative technique was used, with 393 questionnaire survey forms issued to Malaysian QUANTITY SURVEYING consultant businesses. The data was then analyzed using the Statistical Package for the Social Sciences (SPSS) to generate a reliable and valid result. According to the findings, Cubicost software was the most popular software used by QS specialists. Notably, the results revealed that SMEs face greater challenges than large organizations, particularly those connected to professional help, finance, and time, as well as technical issues. Because large corporations and SMEs differed in nature, this study could provide new insights to policymakers in aiding companies of various sizes in their BIM transformation process. The findings called for more policymakers to work together to improve practitioners' understanding of BIM-based technology. The difficulties of SMEs must be recognized, and policymakers must bridge the gap between large and SMEs to bring Malaysia's construction industry one step closer to a new era of digitalization.
Analysis of the Need for Information Systems for Early Childhood Education Services in Play Group during the Covid19 Pandemic
Authors: Mia Fitriwati  , Sri Supatmi  , Rani Puspita Dhaniawaty
Published: December 2023

Early childhood education services in play groups during the COVID-19 pandemic have changed. This change includes various services such as administration, acceptance of new students to the face-to-face teaching and learning process and remote meetings. This is certainly not easy if the group knows how the need for an information system is. The need for this information system aims to provide convenience from various fields of education, especially early childhood education in play groups. In this study, we will discuss the analysis of information system requirements using the value chain analysis method. The analysis uses the value chain in five main activities and four supporting activities. These activities will discuss the needs of early childhood education information systems in play groups which consist of management and implementation of activities, financing, educators and education, blinding of information systems in particular, the use of technology to be used, and how the use of this information system will be used in understand the internal and external parties that will be related to the management of facilities and infrastructure. The results of this value chain analysis will be used as a guide in determining the information system needs by adjusting the early childhood education services in the play group by adjusting the level of management owned by each play group.
Efficiency of a Photovoltaic Thermal (PVT) System using Bio-nanofluid based on Virgin Coconut Oil-Graphene with Additive Surfactant: An Experimental Study
Authors: Avita Ayu Permanasari  , Mohd Afzanizam Mohd Rosli  , Ilham Akbar Habibi  , Poppy Puspitasari  , Sukarni Sukarni  , Safarudin Gazali Herawan  , Nurul Izzati Akmal Mohamed Rafaizul
Published: December 2023

This study explores the efficiency of photovoltaic thermal (PVT) system using bio-nanofluid based on virgin coconut oil (VCO). This research proposes bio-nanofluid as dispersion media because of their potential in medium to high temperature applications in terms of thermal output, biodegradable, and renewable. Graphene nanoplatelets (GNP) were prepared in a mass fraction of 0.1% wt. Then, the ratio for the surfactant was a 1:1 nanoparticle. The surfactants used in this study were Polyvinylpyrrolidone (PVP), Sodium dodecyl sulfate (SDS), and Cetyltrimethylammonium bromide (CTAB). The two-stage method was used for the bio-nanofluid synthesis. Further, the samples were tested for physical and thermophysical properties. From the stability test, we discovered stable dispersion from VCO-GNP-PVP bio-nanofluid sample during the 30 days of testing. The bio-nanofluid samples also presented an increase in thermal conductivity following its stability, with the highest conductivity value (0.158 W/m.K) observed on the VCO-GNP-PVP sample. The efficiency test results on additive surfactant and flow rate show the optimum flow rate of 7 mL/s on VCO-GNP-PVP bio-nanofluid, with thermal and electric efficiency of 25.169% and 8.632%, respectively.
Construction Delay Assessment using Compound Index and Fuzzy Optimization Technique: A Case Study of Hyderabad Construction Industry
Authors: Srikanth Gundurouthula  , M. Gopal Naik  , Togiti Dhilip
Published: December 2023

Construction projects often encounter delays that can have significant impacts on project timelines and budgets. Understanding the factors contributing to these delays is crucial for project managers to implement effective strategies for timely project completion. This study presents a comprehensive assessment of construction delays in the Hyderabad construction industry using a compound index and fuzzy optimization technique. The compound index incorporates Relative Importance Index (RII), Relative Frequency Index (RFI), Relative Severity Index (RSI), and Normal Rank to rank the factors impacting construction delays. Additionally, fuzzy logic is applied to analyze the outcomes of these factors in different scenarios. Based on the findings, the most significant factors influencing project delays are Owner/Client Related factors, Consultant related factors, and Scheduling. These factors consistently result in "No Delay" outcomes in 67% of cases, underscoring their crucial importance for minimizing project delays. Conversely, Product Related Factors and Rules and Regulations exhibit a relatively lower impact on delays, with outcomes primarily falling under "Moderate Delay" in 45% of cases. Project managers can focus on addressing these higher-impact factors to effectively manage and mitigate delays. However, it is noted that some factors, such as rules and regulations and consultant-related factors, display inconsistent outcomes across different scenarios. This variability suggests that the impact of these factors is contingent on specific circumstances or contextual factors. Hence, project managers should exercise judgment and conduct case-by-case assessments when dealing with such factors.The study emphasizes the significance of prioritizing Owner/Client Related factors, Consultant related factors, and Scheduling to minimize construction delays effectively. While Product Related Factors and Rules and Regulations should not be overlooked, they may be more manageable and subject to case-specific considerations. Adaptability and careful evaluation of contextual factors are essential for project managers in the Hyderabad construction industry to address delays and ensure successful project execution.
A Review on Fabrication and Mechanical Characterization of Particulate Reinforced Al-7075 Metal Matrix Composites/Hybrid Composites
Authors: E.V. Ratna Kumar G.  , K. Senthil Kumar  , J.A. Ranga Babu
Published: December 2023

Nowadays almost all the industries around the globe are using the composites instead of ferrous alloys to produce the low weight mechanical elements/components without scarifying the properties of the materials being used. The aluminium is a best substitute to conventional materials due to their ‘low weight’, ‘corrosion resistance’, ‘high strength’ and ‘low density’ properties/ characteristics. Aluminium Metal Matrix (AMM) composites are the trending materials to be used in various engineering applications having the capacity to accomplish the required demand. The specific/ desired properties can be obtained by adding the reinforcement fillers like SiC, TiC, B4C, Tungsten Carbide, Fe, stainless steel, Oxides, Nitrides, Molybdenum Disulphide, fly ash, Graphite, red mud, Agro waste powders like coconut shell ash (CSA), rice husk ash (RHA), palm kernel shell ash (PKSA), bagasse ash, maize stalk ash, been shell waste ash, Bamboo leaf ash, corn cob ash, aloe Vera powder, Egg shell ash and snail shell ash etc., to the Aluminium matrix material. Many researchers have studied the effect of reinforcing materials to the Aluminium matrix to enrich the ‘metallurgical and mechanical’ characteristics with the modification in texture and surface of the composite. The present review article aims to study the technique of stir casting to fabricate Al-7075 based metal matrix and hybrid composites with the incorporation of above reinforcement particulates and how the addition of above reinforcing materials to Al-7075 matrix has enhanced the properties like compressive strength, impact strength, hardness, fracture toughness, wear resistance and corrosion resistance with the reduction in density of composite. The influence of type, size and shape of the reinforcing materials on characteristics of Al-7075 metal matrix composites and the possible reasons of increase/decrease in physical/ mechanical characteristics are studied.
“Dirty dog”, or Anthropological Negativism in the History of Painting
Authors:   Research Institute of Theory and History of Fine Arts, Russian Academy of Arts, Jakimovicz Alexander
Published: December 2023

The article presents the author`s view of the art of Modern times, which mastering negative characters, depicts the insulting behavior of the “lower classes”. Attempts by researchers to see exclusively allegorical subtexts in such works from Brueghel to Brouwer are insufficient. Attention should be paid to the opposition of the artistic environment and political forces emerging in Europe. Anthropological Negativism is born, which then passes through many stages of development (Goya, Courbet, Daumier, Picasso, and then up to and including the Chapman brothers). Russian art participates in this, starting with Perov and Repin, and then continues with the work of Mikhail Larionov, Oscar Rabin, Helium Korzhev, some conceptualists of Moscow and Leningrad (St Petersburg).
The rise of the Renaissance in Ferrara in the 15th century. All about the city
Authors:   Research Institute of Theory and History of Fine Arts, Kozlova Svetlana I.
Published: December 2023

In the 15th century, Ferrara had gradually developed into a large regional center in Italy. Its culture marked by certain elite traits reached a highest level, shown by the opening of Ferrara University and extensive building activity, making Ferrara the “first modern city in Europe”. The brilliant and luxurious life of the city’s nobles was also of great importance.
To the history of the formation and development of the Regional Branch of the Urals, Siberia and the Far East of the Russian Academy of Arts
Authors:   Branch of the State Tretyakov Gallery in Vladivostok, Zotova Olga
Published: December 2023

The article is dedicated to the history of the creation and development of the Regional Branch of the Urals, Siberia and the Far East and the creative workshops of painting, sculpture and graphics of the Russian Academy of Arts, which has been defining the artistic processes across the vast territory from the Urals to the Far East for 35 years. Special attention is paid to the modern stage: forms of work and regular art projects that represent Russian artistic life as a whole.
Animalistic genre in Russian Art of the 18th – early 20th century. Collection of scientific articles
Authors:   Research Institute of Theory and History of Fine Arts, Russian Academy of Arts, Zavyalova Anna , Samokhin Alexander
Published: December 2023

The issue of the magazine includes nine thematic articles based on the materials of the conference “Animalistic genre in Russian Art of the XVIII – early XX century”, held on November 12, 2021 under the auspices of the Russian Academy of Arts and the Research Institute of Theory and History of Fine Arts of the Russian Academy of Fine Arts.
Ready-made in the works of Zurab Tsereteli
Authors:   Moscow Museum of Modern Art, Svalova Olga
Published: December 2023

Zurab Tsereteli’s works produced with the ready-made technique through the entire period of his creativity from late 1960s to date are examined for the first time. The article presents description and analysis of the master’s works preceded by a brief overview of history, development and forms of ready-made as a contemporary art method.
Museum and exhibition presentation of the works of Vitold K. Bialynitsky-Birulya in the context of the evolution of the landscape genre
Authors:   National Art Museum of the Republic of Belarus, branch “Museum of V.K. Byalynitsky-Birulya”, Strogina Svetlana
Published: December 2023

The article provides an analytical review of the lyrical and poetic works of the artist, presented at the Vitold K. Bialynitsky-Birulya Memorial Museum (Mogilev). Using the permanent exposition “The Art of Vitold K. Bialynitsky-Birulya of the first half of the 20th century” as an example, the museum and exhibition presentation of the works of Vitold K. Bialynitsky-Birulya is examined in the context of the evolution of the landscape genre. The artistic value of the landscapes is considered in the organic unity of the master`s creative work and worldview against the backdrop of the general aesthetic tendencies of his era. The article pays special attention to the analysis of the content side of Vitold K. Bialynitsky-Birulya`s art, exploring his individual artistic concept.
Paintings and postcards by V.K. Byalynitsky-Birulya in the collection of S.N. Gorshin
Authors:   Khimki Art Gallery named after S.N. Gorshin, Sambur Marina
Published: December 2023

The article examines the history of the acquisition of paintings by V.K. Bialynitsky-Birulya by the Soviet collector S.N. Gorshin. Based on his private collection, which included paintings and graphics from the 19th to the 20th century, Khimki Art Gallery was opened in 1993. S.N. Gorshin assembled around 300 works of Russian realistic art, of which 33 works belong to the brush of the Belarusian artist. Postcards-reproductions became the main source of visual information for Gorshin to study the works of the artists. He collected around 20,000 pre-revolutionary and Soviet postcards. It was precisely through them that the collector unmistakably determined the authorship of the original work when making a purchase. The text provides specific examples of painting acquisitions based on postcards.
Sergey Romanovich. Art and Life
Authors:   Russian Academy of Arts, Kiselev Michael
Published: December 2023

The monograph by A.N. Inshakov, “Sergey Mikhailovich Romanovich: Art and Life” (BooksMArt, 2022), explores the artist’s work in the broad context of Russian visual arts in the 20th century. The author deeply investigates the evolution of Romanovich’s worldview, his stylistic and aesthetic preferences – from avant-garde to the ideas of “Makovets” and the fundamental world classical heritage.
Zielkonflikt zwischen Lärmschutz und Siedlungsverdichtung
Authors: Lüdi Miriam
Published: December 2023

Der Konflikt zwischen der Siedlungsverdichtung und dem Lärmschutz führt in der Raumplanung und bei Bauprojekten zu Herausforderungen. Der Druck, Siedlungen zu verdichten, nimmt stetig zu. Gleichzeitig wird der Verkehrs-, Alltags- sowie Freizeitlärm vielerorts lauter und kann Bauprojekte verhindern, die sich eigentlich zur Siedlungsverdichtung eignen würden. Verschiedentlich wird gefordert, dass der Zielkonflikt zwischen dem Lärmschutz und der Siedlungsverdichtung im Lärmschutzrecht besser geregelt wird. Der Bundesrat hat einen Erlassentwurf sowie eine Botschaft zur Änderung des Lärmschutzrechts im Umweltschutzgesetz an das Parlament überwiesen. Vor diesem Hintergrund wird in diesem Buch die geltende und zukünftige Rechtslage analysiert.
TD 2879 - Prioriza SUS : proposta para o aperfeiçoamento da gestão do SUS por meio do planejamento, do monitoramento e da avaliação da ação governamental
Authors: Vieira Fabiola Sulpino , Servo Luciana Mendes Santos , Piola Sérgio Francisco , Sá Edvaldo Batista de , Benevides Rodrigo Pucci de Sá e
Published: December 2023

O objetivo deste texto é analisar problemas do Brasil no campo da saúde, com destaque para a gestão do Sistema Único de Saúde (SUS), visando à elaboração e à recomendação de ações concretas a fim de assegurar o acesso da população a bens e serviços de saúde de forma universal, igualitária e integral por meio desse sistema. Utilizou-se do arcabouço metodológico da análise de políticas públicas para exame de problemas da área da saúde e proposição de soluções. O problema público, que é a distância entre a situação atual e a almejada sob o ponto de vista de um ator relevante, foi definido como a dificuldade de acesso tempestivo, efetivo e equitativo à atenção à saúde. Elaborou-se uma árvore do problema e várias causas foram identificadas, elegendo-se para análise neste estudo o problema estrutural do SUS que foi denominado “gestão estratégica deficiente”. Entre suas causas, estão os processos de planejamento, monitoramento e avaliação deficientes e insuficientes. Este trabalho propõe algumas ações para enfrentamento desse problema. Foi realizado um fórum de política pública com a participação de pesquisadores, técnicos e gestores do SUS com relevante conhecimento sobre o tema, a fim de discutir a proposta preliminar de ações. As contribuições dos participantes do fórum foram incorporadas, aperfeiçoando-se as ações inicialmente propostas e agregando-se nova ação ao rol de medidas sugeridas como resposta ao problema estrutural sob análise. Por fim, recomenda-se a avaliação da propriedade das soluções sugeridas nas discussões que poderão ocorrer sob a iniciativa do Ministério da Saúde, visando à pactuação de ações que promovam o planejamento, o monitoramento e a avaliação no SUS e, com isso, o aprimoramento de sua gestão estratégica.
TD 2881 - A Organização das Nações Unidas e o objetivo de desenvolvimento sustentável 14 : desafios para o Brasil na década do oceano
Authors: Andrade Israel de Oliveira , Mont’Alverne Tarin Cristino Frota , Di Pasquale Adriana I. B. Sá Leitão , Silva Solange Teles da
Published: December 2023

A Organização das Nações Unidas (ONU), após a adoção da Agenda 2030 para o Desenvolvimento Sustentável e o estabelecimento de seus dezessete Objetivos de Desenvolvimento Sustentável (ODS), deu um passo além no engajamento em prol da conservação do oceano, declarando a Década da Ciência Oceânica para o Desenvolvimento Sustentável (Década do Oceano), de 2021 a 2030. As ações empenhadas neste âmbito visam garantir que a ciência oceânica possa apoiar os Estados a fim de alcançar todo o conteúdo da Agenda 2030, sobretudo naquilo que se relaciona com a conservação do oceano. O Brasil, ao assumir os compromissos elencados no documento lançado durante a Cúpula das Nações Unidas sobre o Desenvolvimento Sustentável, no entanto, tem enfrentado uma série de desafios relacionados à implementação dos ODS, em especial, o ODS 14: Vida na água – conservação e uso sustentável dos oceanos, dos mares e dos recursos marinhos para o desenvolvimento sustentável. Partindo dessa premissa, este estudo objetiva demonstrar a urgente necessidade de implementar as metas do ODS 14 para alcançar os resultados da Década do Oceano. Para tanto, em um primeiro momento, analisa-se a relação entre a Agenda 2030 e a Década do Oceano, observando-se a importância do oceano para promoção do desenvolvimento sustentável. A seguir, busca-se evidenciar a essencialidade do ODS 14 para a vida na água, abordando a Década do Oceano como fundamental para as ações em prol da conservação e do uso sustentável dos oceanos no presente e no futuro. E, complementando a presente análise, faz-se uma discussão sobre os desafios e as estratégias brasileiras para alcançar as metas do ODS 14.
TD 2882 - Políticas territoriais em tempos de múltiplas crises : desafios e perspectivas para o Brasil na década de 2020
Authors: Monteiro Neto Aristides , Colombo Lucileia Aparecida , Rocha Neto João Mendes da
Published: December 2023

Crises globais de naturezas diversas – econômica, política, pandêmica e ambiental – têm se tornado frequentes e acumulativas no ambiente de atuação das políticas governamentais contemporâneas desde meados da década de 2000. No Brasil, recessão econômica, crise de representação política, reformas, desajustes e desmontes de políticas têm sido uma constante desde 2015 afetando a permanência de políticas, inclusive as de dimensão territorial (regional, urbana e rural). Neste Texto para Discussão discutimos as implicações das múltiplas crises sobre a Política Nacional de Desenvolvimento Regional (PNDR). Apontamos, de um lado, a necessidade de renovação de objetivos, pela incorporação de uma agenda de mudança estrutural ambientalmente sustentada pela atenção simultânea a duas questões vistas como essenciais: i) a mudança climática e a transição energética; e ii) aumentar a produtividade sistêmica regional pela realização de esforços na capacidade inovativa. De outro lado, problemas de governança e gestão da política – na seara do baixo nível de coordenação federativa, sua frágil legitimidade, entre outros – precisam ser equacionados para garantir a efetividade das ações promotoras de crescimento sem desigualdades.
Social hand washing
Authors: UFS School of Medicine
Published: December 2023

Social hand washing technique illustration.
Social hand washing
Authors: UFS Clinical Simulation and Skills Unit
Published: December 2023

Social hand washing technique illustration.
History taking
Authors: UFS School of Medicine
Published: December 2023

An example of history taking.
History taking
Authors: UFS Clinical Simulation and Skills Unit
Published: December 2023

An example of history taking.
Training, validation and test datasets and model files for larger US Health Insurance dataset
Authors: Blomerus Jan
Published: December 2023

Formats1.xlsx contains the descriptions of the columns of the following datasets: Training, validation and test datasets in combination are all the records.

sens1.csv and and meansdX.csv are required for testing.
Training, validation and test datasets and model files for larger US Health Insurance dataset
Authors: Blomerus Jan
Published: December 2023

TBC upon acceptance of the published article.
A collaborative exploration of pedagogical refrain within science education.
Authors: Venter Zettie
Published: December 2023

With this research I contribute to post-qualitative inquiry, moving with the complexities of life-living and interrogating my personal pedagogy. I used the concept of the refrain (Deleuze and Guattari 1988: 310), here understood as coinciding memory and imagination, and expressed response to educational experience by employing collaborative arts-based methodologies, such as community drumming, tapping into sensory and imaginary knowledge amongst humans and the more-than-human. To me, my use of the concept refrain opened preverbal knowledge about different subjectivities of peers and mentors informing my pedagogy. Through my use of pedagogical refrain, post-qualitative arts-based inquiry holds significance in crafting programs for science educator development. By showing appreciation for life's complexities informing my pedagogy, I suggest that science education value response through artmaking twofold: educators' being and becoming and complexities in education as ever evolving and changing.
The GBT Diffuse Ionized Gas Survey (GDIGS): Discrete Sources
Authors: Linville Dylan J. , Luisi Matteo , Anderson L. D. , Liu Bin , Bania T. M. , Balser Dana S. , Wenger Trey V. , Haffner L. M. , Mascoop J. L.
Published: December 2023

The Green Bank Telescope Diffuse Ionized Gas Survey (GDIGS) traces ionized gas in the Galactic midplane by observing radio recombination line (RRL) emission from 4 to 8 GHz. The nominal survey zone is 32.°3 > ℓ > −5°, ∣ b ∣ < 0.°5. Here, we analyze GDIGS Hnα ionized gas emission toward discrete sources. Using GDIGS data, we identify the velocity of 35 H ii regions that have multiple detected RRL velocity components. We identify and characterize RRL emission from 88 H ii regions that previously lacked measured ionized gas velocities. We also identify and characterize RRL emission from eight locations that appear to be previously unidentified H ii regions and 30 locations of RRL emission that do not appear to be H ii regions based on their lack of mid-infrared emission. This latter group may be a compact component of the Galactic Diffuse Ionized Gas. There are an additional 10 discrete sources that have anomalously high RRL velocities for their locations in the Galactic plane. We compare these objects’ RRL data to 13CO, H i, and mid-infrared data, and find that these sources do not have the expected 24 μm emission characteristic of H ii regions. Based on this comparison we do not think these objects are H ii regions, but we are unable to classify them as a known type of object.
Star-forming Main Sequence of Giant Low Surface Brightness Galaxies
Authors: Du Wei , Cheng Cheng , Du Pengliang , Du Lin , Wu Hong
Published: December 2023

Giant low surface brightness galaxies (GLSBGs) are fundamentally distinct from normal galaxies and other types of LSBGs in terms of star formation and evolution. In this work, we collected 27 local GLSBGs from the literature. They have high stellar masses (M
* > 1010
M
⊙) and low far-ultraviolet-based star formation rates (SFRs). With specific star formation rates (sSFRs) lower than the characteristic value of local star-forming galaxies (SFGs) of M
* = 1010
M
⊙ (sSFR < 0.1 Gyr−1), GLSBGs deviate from the star formation main sequence (MS) defined for local SFGs respectively by Elbaz et al. (E07) and Saintonge et al. (S16) at the high-M
* regime. They are H i-rich systems with H i gas mass fractions (f
H I) higher than the S16 MS galaxies, but have little molecular gas (H2), implying a quite low efficiency of H i-to-H2 transition due to low H i surface densities (Σ H i) that are far lower than the minimum Σ H i of 6–8 M
⊙ pc−2 required for shielding the formed H2 from photodissociation. For GLSBGs, the inner, bulge-dominated parts with lower SFRs and higher M
* are the main force pulling the entire GLSBG sample off of the MS, while the outer, disk-dominated parts with relatively higher SFRs and lower M
* reduce the deviation from the MS. For some cases, the outer, disk-dominated parts even tend to follow the MS. In the aspect of near-ultraviolet − r versus g − r colors, the outer, disk-dominated parts are blue and behave similarly to normal SFGs while the inner, bulge-dominated parts are statistically redder, indicating an inside–out star formation mechanism for GLSBGs. They show few signs of external interactions in morphology, excluding the recent major merger scenario.
Mock Observations: Formation and Evolution of Diffuse Light in Galaxy Groups and Clusters in the IllustrisTNG Simulations
Authors: Tang Lin , Lin Weipeng , Wang Yang , Li Jing , Lan Yanyao
Published: December 2023

In this paper, by analyzing mock images from the IllustrisTNG100-1 simulation, we examine the properties of diffuse light and compare them to those of central and satellite galaxies. Our findings suggest that the majority of the diffuse light originates from satellites. This claim is supported by the similarity between the age and metallicity distributions of the diffuse light and those of the satellites. Notably, the color distribution of the diffuse light gradually evolves to resemble that of the centrals at lower redshifts, suggesting a coevolution or passive process. The radial profiles of the diffuse light reveal distinct trends, with the inner regions displaying a relatively flat distribution and the outer regions showing a descending pattern. This finding suggests that the formation of the diffuse light is influenced by both major mergers and stellar tidal stripping. Moreover, strong correlations are found between the stellar mass of the diffuse light and the overall stellar mass of the satellites, as well as between the stellar mass of the diffuse light and the number of satellites within groups or clusters. These relationships can be described by power-law and logarithmic functions. Overall, the diffuse light components predominantly originate from satellites with intermediate ages and metallicities. These satellites typically fall within the stellar mass range

8
<

log

10

(

M

⋆

/

M

⊙

)
<
10

and the color range −1 < [g − r]0.1 < 0. As the redshift decreases, the growth of the diffuse light is primarily influenced by the redder satellites, while the most massive and reddest satellites have minimal roles in its growth.
Fitting and Comparing Galactic Foreground Models for Unbiased 21 cm Cosmology
Authors: Hibbard Joshua J. , Rapetti David , Burns Jack O. , Mahesh Nivedita , Bassett Neil
Published: December 2023

Accurate detection of the cosmological 21 cm global signal requires galactic foreground models that can remove power over 106. Although foreground and global signal models unavoidably exhibit overlap in their vector spaces inducing bias error in the extracted signal, a second source of bias and error arises from inadequate foreground models, i.e., models that cannot fit spectra down to the noise level of the signal. We therefore test the level to which seven commonly employed foreground models—including nonlinear and linear forward models, polynomials, and maximally smooth polynomials—fit realistic simulated mock foreground spectra, as well as their dependence upon model inputs. The mock spectra are synthesized for an EDGES-like experiment and we compare all models’ goodness of fit and preference using a Kolmogorov–Smirnov (K-S) test of the noise-normalized residuals in order to compare models with differing, and sometimes indeterminable, degrees of freedom. For a single local sidereal time (LST) bin spectrum and p-value threshold of p = 0.05, the nonlinear forward model with four parameters is preferred (p = 0.99), while the linear forward model fits well with six to seven parameters (p = 0.94, 0.97, respectively). The polynomials and maximally smooth polynomials, like those employed by the EDGES and SARAS3 experiments, cannot produce good fits with five parameters for the experimental simulations in this work (p < 10−6). However, we find that polynomials with six parameters pass the K-S test (p = 0.4), although a nine-parameter fit produces the highest p-value (p ∼ 0.67). When fitting multiple LST bins simultaneously, we find that the linear forward model outperforms (a higher p-value) the nonlinear model for 2, 5, and 10 LST bins. Importantly, the K-S test consistently identifies best-fit and preferred models.
JWST Identification of Extremely Low C/N Galaxies with [N/O] ≳ 0.5 at z ∼ 6–10 Evidencing the Early CNO-cycle Enrichment and a Connection with Globular Cluster Formation
Authors: Isobe Yuki , Ouchi Masami , Tominaga Nozomu , Watanabe Kuria , Nakajima Kimihiko , Umeda Hiroya , Yajima Hidenobu , Harikane Yuichi , Fukushima Hajime , Xu Yi , Ono Yoshiaki , Zhang Yechi
Published: December 2023

We present chemical abundance ratios of 70 star-forming galaxies at z ∼ 4–10 observed by the JWST/NIRSpec Early Release Observations, GLASS, and CEERS programs. Among the 70 galaxies, we have pinpointed two galaxies, CEERS_01019 at z = 8.68 and GLASS_150008 at z = 6.23, with extremely low C/N ([C/N] ≲ −1), evidenced with C iii]λλ1907,1909, N iii]λ1750, and N iv]λλ1483,1486, which show high N/O ratios ([N/O] ≳ 0.5) comparable with the one of GN-z11, regardless of whether stellar or active galactic nucleus radiation is assumed. Such low C/N and high N/O ratios found in CEERS_01019 and GLASS_150008 (additionally identified in GN-z11) are largely biased toward the equilibrium of the CNO cycle, suggesting that these three galaxies are enriched by metals processed by the CNO cycle. On the C/N versus O/H plane, these three galaxies do not coincide with Galactic H ii regions, normal star-forming galaxies, and nitrogen-loud quasars with asymptotic giant branch stars, but with globular-cluster (GC) stars, indicating a connection with GC formation. We compare the C/O and N/O of these three galaxies with those of theoretical models and find that these three galaxies are explained by scenarios with dominant CNO-cycle materials, i.e., Wolf–Rayet stars, supermassive (103–105
M
⊙) stars, and tidal disruption events, interestingly with a requirement of frequent direct collapses. For all the 70 galaxies, we present measurements of Ne/O, S/O, and Ar/O, together with C/O and N/O. We identify four galaxies with very low Ne/O, log(Ne/O) < −1.0, indicating abundant massive (≳30 M
⊙) stars.
Experimental Phase Function and Degree of Linear Polarization of Light Scattered by Hydrogenated Amorphous Carbon Circumstellar Dust Analogs
Authors: Gómez Martín Juan Carlos , Muñoz Olga , Martikainen Julia , Guirado Daniel , Tanarro Isabel , Peláez Ramón J. , Maté Belén , Jiménez-Redondo Miguel , Herrero Víctor J. , Peiteado Marco , Jardiel Teresa
Published: December 2023

Astronomical observations of the polarized intensity of scattered visible light have revealed the presence of dust envelopes around different types of evolved stars. These observations have helped determine the diameter and width of dust shells around stars with unprecedented accuracy. Simple geometric particle models are used in order to retrieve dust properties from these observations. In this work, we have synthesized and characterized a particulate sample of hydrogenated amorphous carbon (HAC), which is considered to be a realistic carbonaceous interstellar dust analog based on infrared absorption spectroscopy, and we have measured its phase function and degree of linear polarization curves at 514 nm using the CODULAB apparatus at IAA-CSIC. The experimental light-scattering data has been examined in order to explore possible improvements in the interpretation of astronomical observations of circumstellar dust from the point of view of the retrieval of dust properties, including size and porosity. Our results suggest that circumstellar dust observations of linearly polarized scattered light, which are commonly attributed to a population of spherical grains with a radius of ∼0.1 μm, are consistent with larger porous aggregates composed of nanometer-sized grains. In addition, an internal 50wt% mixture of HAC and ultrafine forsterite powder has been generated to study the effect of the mixing of these two components on the light-scattering behavior of dust in cometary environments and protoplanetary disks. In this case, the HAC component, which is not very absorbent, has a very small effect, and the mixture scatters light similarly to the forsterite sample.
Optical Monitoring of the Didymos–Dimorphos Asteroid System with the Danish Telescope around the DART Mission Impact
Authors: Rożek Agata , Snodgrass Colin , Jørgensen Uffe G. , Pravec Petr , Bonavita Mariangela , Rabus Markus , Khalouei Elahe , Longa-Peña Penélope , Burgdorf Martin J. , Donaldson Abbie , Gardener Daniel , Crake Dennis , Sajadian Sedighe , Bozza Valerio , Skottfelt Jesper , Dominik Martin , Fynbo J. , Hinse Tobias C. , Hundertmark Markus , Rahvar Sohrab , Southworth John , Tregloan-Reed Jeremy , Kretlow Mike , Rota Paolo , Peixinho Nuno , Andersen Michael , Amadio Flavia , Barrios-López Daniela , Castillo Baeza Nora Soledad
Published: December 2023

The NASA’s Double-Asteroid Redirection Test (DART) was a unique planetary defence and technology test mission, the first of its kind. The main spacecraft of the DART mission impacted the target asteroid Dimorphos, a small moon orbiting the asteroid Didymos (65803), on 2022 September 26. The impact brought up a mass of ejecta which, together with the direct momentum transfer from the collision, caused an orbital period change of 33 ± 1 minutes, as measured by ground-based observations. We report here the outcome of the optical monitoring campaign of the Didymos system from the Danish 1.54 m telescope at La Silla around the time of impact. The observations contributed to the determination of the changes in the orbital parameters of the Didymos–Dimorphos system, as reported by Thomas et al., but in this paper we focus on the ejecta produced by the DART impact. We present photometric measurements from which we remove the contribution from the Didymos–Dimorphos system using an H–G photometric model. Using two photometric apertures we determine the fading rate of the ejecta to be 0.115 ± 0.003 mag day−1 (in a 2″ aperture) and 0.086 ± 0.003 mag day−1 (5″) over the first week postimpact. After about 8 days postimpact we note the fading slows down to 0.057 ± 0.003 mag day−1 (2″ aperture) and 0.068 ± 0.002 mag day−1 (5″). We include deep-stacked images of the system to illustrate the ejecta evolution during the first 18 days, noting the emergence of dust tails formed from ejecta pushed in the antisolar direction, and measuring the extent of the particles ejected Sunward to be at least 4000 km.
As implicações administrativas e jurídicas do financiamento rural na faixa de fronteira brasileira
Authors: Rodrigues Matias Pereira
Published: December 2023

O ordenamento jurídico brasileiro incorporou em 1975, através do Decreto-lei nº 1.414, o procedimento administrativo de ratificação em faixa de fronteira, com fundamentos na Constituição Federal e na lei agrária nº 4.947/1966. Recentemente, o Poder Executivo alterou a legislação que disciplina o tema, com o objetivo de confirmação das titulações originárias de forma automática para os registros imobiliários com áreas de até 15 MF e com exigências de georreferenciamento e atualização cadastral para as áreas acima de 15 MF. Porém, a lei nº 13.178/2015 não solucionou a questão da ratificação em faixa de fronteira, ao não esclarecer os papéis do órgãos fundiários nacionais, dos Registro de Imóveis Rurais e dos próprios proprietários rurais. Sem a ratificação em faixa de fronteira, existe um risco de nulidade dos registros imobiliários, conferindo uma insegurança jurídica para as transações realizadas, como também para a continuidade dos efeitos de transferência do imóvel rural, averbações e garantias hipotecárias, já que estes registros podem ser declarados nulos e revertidos à União Federal. O foco e a discussão do artigo será a análise da segurança jurídica dos registros imobiliários utilizados para acesso ao crédito rural, sem terem sido previamente analisados o instrumento de ratificação em faixa de fronteira.
Agroecologia e agricultura familiar sustentável: percursos e estratégias para transição
Authors: Santana Gildo Ribeiro , Andrade Horasa Maria Lima da Silva , Andrade Luciano Pires
Published: December 2023

Este estudo visa identificar e analisar os percursos e estratégias adotadas pelos trabalhadores camponeses para realizar a transição agroecológica na agricultura familiar. Assim, busca-se aqui compreender, ainda que sinteticamente, a relevância do associativismo cooperativista adotados pelos agricultores familiares enquanto estratégia organizacional para socializar possibilidades da produção de base ecológica sob enfoques nos fundamentos da ciência agroecológica. A transição resultará da compreensão e aceitação desse novo paradigma de desenvolvimento sustentável com ações coletivas fundamentadas em novos valores, princípios e manejos. Ainda, deverá haver reivindicações e acesso às políticas públicas setoriais afins a sustentabilidade socioambiental: ATER de base agroecológica; mercados curtos via PAA, PNAE; feiras livres agroecológicas e etc. O estudo apontou que a transição é factível, viável e estrategicamente se inicia pelas dimensões subjetivas resultantes de momentos coletivos de análises e reflexões provocados pelas organizações sociais rurais, em seguida, começam as mudanças objetivas nas unidades de produção familiar. A utilização dos fundamentos da agroecologia na agricultura familiar poderá alterar as sociabilidades e consequentemente proporcionar relações sociais mais respeitosas que priorizem a preservação dos ecossistemas e valorizarem as expressões culturais, sociais, ambientais, políticas e econômicas. O percurso metodológico utilizado apoiou-se na abordagem qualitativa e fundamenta-se nos princípios da revisão sistemática de literatura.
Nível de modernização na agricultura familiar do semiárido no estado do Ceará
Authors: Da Costa Filho João , Da Cruz Marcos Paulo Mesquita , Lima Filipe Augusto Xavier , De Araujo Jair Andrade
Published: December 2023

Este trabalho tem como objetivo avaliar o nível de modernização nas Unidades Agrícolas Familiares (UAFs) e seus efeitos na renda média e na ocupação dos agricultores familiares dos municípios do semiárido no estado do Ceará, na região Nordeste do Brasil. Para tanto, criou-se um índice de modernização desses estabelecimentos agrícolas familiares, utilizando a técnica de análise fatorial dos componentes principais. Para o nível de modernização, foram definidas três situações (“Alto”, “Médio” e “Baixo”). Foram avaliados os 175 municípios localizados no semiárido e as oito macrorregiões climáticas do Ceará. De acordo com as variáveis utilizadas no estudo, e a partir da técnica estatística aplicada, os resultados mostraram que os municípios do semiárido do Ceará apresentaram uma distribuição equilibrada quanto ao nível de modernização nas UAFs, o que não aconteceu com as macrorregiões do estado, ou seja, entre os municípios que compõem essas macrorregiões, esse equilíbrio não ocorre. Nesses municípios, o índice de modernização predominante foi o nível de modernização “Médio”. Já a renda média, apresentou uma relação diretamente proporcional ao nível de modernização nas UAFs. Em relação à alocação da mão de obra familiar (ocupação), observou-se que o aumento do nível de modernização não provocou a sua redução nos estabelecimentos rurais.
Análise do uso das calçadas nos deslocamentos cotidianos em uma cidade da região nordeste - Brasil
Authors: De Araújo Rozana Rivas , Guedes Italo César Montalvão
Published: December 2023

Este artigo trata dos fatores que podem inibir ou motivar o uso das calçadas dentro da temática sobre mobilidade urbana. A argumentação teórica estende-se por autores que abordam a necessidade de uma cidade mais dinâmica e “visível” ao nível do térreo como estimulador do uso das calçadas, sobre leis que induzem a uma cidade acessível e sobre a importância da massa arbórea enquanto elemento primordial no conforto térmico em cidades de clima tropical. O objetivo deste trabalho foi investigar correlações entre o uso das calçadas com sua condição física, conforto térmico, dinamicidade nos térreos e permeabilidade visual entre espaço público-privado. Para tanto, adotou-se três etapas metodológicas: caracterização do espaço caminhável (condição física, uso do solo, interface público-privado, arborização, conforto térmico); observação do uso das calçadas; investigação do uso do automóvel em percursos curtos. Como estudo de caso, foram escolhidas quatro áreas de Aracaju - Sergipe, cada uma com raio de 500 metros do ponto atrator (uma padaria ou uma escola). Os resultados evidenciaram a importância dos aspectos analisados como motivadores para o uso das calçadas, mas que, em última instância, é a permeabilidade visual e a diversidade de usos do solo que influenciam no uso das calçadas.Palavras-chave: Mobilidade urbana, Caminhabilidade, Permeabilidade visual, Vigilância social, Conforto térmico.
Receita pública em períodos pós crise: uma análise do município de Manaus
Authors: Feitoza Gustavo Pena , Santos Andreia Brasil
Published: December 2023

As receitas públicas dos entes federados são de suma importância para que o mesmo possa cumprir com suas obrigações legais. No entanto períodos de crise podem impactar na arrecadação, gerando imprevisibilidade sobre a mesma. O século XXI já foi assolado por duas crises que impactaram a economia global.  A primeira foi em 2008, denominada crise do subprime e a segunda adveio de uma crise sanitária, causada pela propagação da COVID-19, uma doença até então desconhecida. Neste contexto, o artigo teve como objetivo geral analisar o comportamento e a estrutura das receitas públicas do município de Manaus, no período posterior à ocorrência das crises. A metodologia utilizada no trabalho foi uma pesquisa bibliográfica, sistematizando os estudos de diversos autores, e descritiva, analisando o comportamento das receitas após os eventos de grande impacto. Observou-se que a crise sanitária gerou mais impactos na arrecadação pública no município de Manaus que a crise do subprime.
Análise bibliométrica e avaliação da produção de hidrogênio baseada na velocidade do vento de uma localidade do nordeste
Authors: Branco João Victor Castelo , Leal Jairon Isaias , Andrade Carla Freitas , Rocha Paulo Alexandre Costa , Pitombeira Anselmo Ramalho
Published: December 2023

A tecnologia de produção de hidrogênio por energia eólica é um meio eficaz para melhorar o aproveitamento da energia eólica. Esse artigo avalia o potencial de energia eólica de uma localidade do Nordeste do Brasil, e analisa a produção de hidrogênio correspondente. No Brasil, em especial no Nordeste, devido a abundancia do recurso vento, um caminho ideal para a produção de energia limpa e com emissão zero de carbono é através do desenvolvimento do setor eólico-hidrogênio. Para isso, o potencial energético da produção e uso industrial de hidrogênio deve ser estudado. Neste trabalho, uma avaliação do potencial do recurso eólico é feita com base nos dados de da velocidade do vento, utilizando a distribuição de Weibull, através de uma programação em Python, para uma determinada região do Nordeste Brasileiro. Os dados utilizados são do programa SONDA e a localidades escolhidas foi São João do Cariri, na Paraiba. A distribuição utilizada foi a de Weibull e os seus parâmetros foram calculados através dos métodos Empírico, Máximo Versossemelhança, Momento e Energia Padrão. Posteriormente, considerou-se a curva de potencia de uma turbina comercial.
Um contexto para elaboração de um planejamento estratégico-situacional
Authors: Silva Hilda Maria G , Guimarães Nascimento Marina , Alves Farias Janaína , Moretto Erika
Published: December 2023

Este artigo é o resultado de um estudo de caso desenvolvido a partir da teoria de Carlos Matus, para identificar a dinâmica da composição dos agentes públicos, e suas relações no contexto de uma escola pública de Educação Básica municipal, a fim de situar as dificuldades e as potencialidades da instituição na elaboração de um Planejamento Estratégico-Situacional (PES). A primeira parte deste trabalho conta com a apresentação das principais características da instituição de ensino analisada. Na sequência, o trabalho de observação da interrelação dos agentes públicos envolvidos, bem como a análise do Plano Gestor da escola permitiram levantar quatro aspectos da instituição escolar, os quais são considerados complexos pelo nível de influência que podem exercer, no âmbito do esforço coletivo de construção de um PES. A pesquisa permitiu observar que, muitas vezes potencialidades e fraquezas se confundem, a identificação dessas potencialidades e fraquezas, bem como das oportunidades e ameaças externas é ponto de partida fundamental na construção do planejamento educacional e o diretor se configura como liderança decisiva na abertura de espaço, redução de entraves e mobilização dos agentes públicos para tal construção.