bluuebunny/crossref_metadata_2025 huggingface dataset:
Hardening technology of metallurgical equipment parts by high-speed nitrogen alloys
Authors: Malushin N.N. , Gromov V.E. , Romanov D.A. , Bashchenko L.P. , Gostevskaya A.N.
Published: November 2023

The technology for hardening of metallurgical equipment parts by high-speed alloys with high nitrogen content is developed. The manufacturing process of deposited parts includes: machining of the workpiece, plasma surfacing, high-temperature tempering, finishing machining and quality control. To form a coating on 30KhGSA steel, an installation for plasma surfacing of bodies of rotation is used. A method and surfacing materials for multilayer plasma surfacing are developed, which make it possible to obtain deposited layers made of high-speed alloys (type R18Yu), additionally alloyed with nitride ferrochrome and titanium, which allows increasing the nitrogen content from 0.02 to 0.12 %. The surfacing method with low-temperature heating and surfacing materials prevent the formation of cracks during the surfacing process and ensure the hardness of the deposited metal up to 59...60 HRC without additional heat treatment. The hardness of the deposited metal after high-temperature tempering at a temperature of 560...580 °C increases to 62...64 HRC. Multilayer plasma surfacing made it possible to obtain a high-quality surfaced layer without cracks, pores and microstructure defects. The main phases of the deposited layer are a solid solution of α-iron, carbides and carbonitrides based on iron, tungsten, molybdenum, chromium, aluminum and titanium. The wear resistance of the deposited parts of metallurgical equipment (rolls and rollers of crushers) increases by 1.5—2.0 times.
Evolution of microstructure of Al–3Ca–Mn–Zn–Fe–Si casting alloy of under plastic deformation
Authors: Gnevashev A.A. , Petrov P.A. , Burlakov I.A. , Nguyen Kh.T. , Naumova E.A.
Published: November 2023

The effect of plastic deformation of samples made of the Al–3Ca–Mn–Zn–Fe–Si casting alloy in the temperature range 20...450 °C and the strain rate range 0.001...0.4 s–1 on structure formation and flow stress is considered. The value of deformation in the experiments is about 50 %. Based on the analysis of the results of experimental studies carried out by the compression method using an LFM50 testing machine, it is shown that the change in the structure of the Al–3Ca–Mn–Zn–Fe–Si alloy depends on the selected plastic deformation mode.
Grilagem judicial verde: um estudo de caso sobre a participação do Poder Judiciário na expansão do agronegócio no estado do Tocantins
Authors: Vas Braz Batista , Machado Leador
Published: November 2023

This study highlights the concentration of land in the municipality of Campos Lindos, Tocantins, along with the process of expelling traditional communities from this region which resulted from the project known as Matopiba. With the occupation of plateau areas through a state decree that expropriated these lands and handed them over to politicians and local and national authorities, a court decision also authorized the return of expansion to the lowland baixões. While these areas are the home of traditional communities, their continued occupation is now being questioned in court as the baixões are being considered as environmental reserves. Here we analyze the judicial decision that consolidated this vision; based on a study of documents and the literature revealing similar cases, signs that a pattern of “green judicial land grabbing” is forming are identified. The history of the land and occupation in this region is investigated, along with the concrete case in the judicial process and a pattern in the underlying discourse.
MENGANALISIS KESULITAN GURU DALAM MENGHADAPI PESERTA DIDIK PADA TAHAP MEMBACA DAN MENULIS PERMULAAN DI KELAS RENDAH SDN 064037
Authors: Kalisa Dwi Putri  , Patra Aghtiar Rakhman  , , Nana Hendra Cipta
Published: November 2023

Penelitian ini bertujuan untuk mengetahui bagaimana guru dalam menghadapi kesulitan yang dialami oleh peserta didik, pada tahap membaca dan menulis permulaan pada kelas rendah di Sekolah Dasar 064037. Dalam penelitian ini, peneliti menggunakan  jenis penelitian kualitatif dengan metode deskriptif. Serta dalam pengumpulan data, peneliti menggunakan teknik wawancara. Keterampilan membaca dan menulis pemahaman merupakan salah satu jenis keterampilan yang harus dimiliki oleh peserta didik terutama pada peserta didik pada kelas rendah. Hasil penelitian ini menunjukkan bahwa bagaimana cara guru dalam mengatasi kesulitan yang dialami oleh peserta didik kelas rendah pada tahap membaca dan menulis permulaan di Sekolah Dasar.
PERAN PENGABDIAN MASYARAKAT DALAM MENTAHSIN BACAAN AL-QUR’AN DI KELURAHAN BRANDAN BARAT
Authors: Susanti Br Siregar Nova , Muhammad Yusuf Harahap  , Salsabila Putri Lubis  , Siti Mutiah Siregar
Published: November 2023

Pendidikan Alquran adalah pendidikan paling utama yang harus diajarkan kepada setiap manusia. Dalam penelitian ini yang mana bertujuan untuk membantu mentahin bacaan Al Quran yang mana difokuskan kepada anak-anak di Kelurahan Brandan Barat. Metode yang digunakan adalah metode kualitatif deskriptif. Teknik pengumpulan data yang digunakan yaitu observasi dan dokumentasi penelitian ini menunjukkan bahwa mentahsin bacaan Al Qur’an di Kelurahan Brandan Barat.
EVALUASI DAMPAK KEBIJAKAN ADMINISTRASI PENDIDIKAN ANAK USIA DINI TERHADAP CAPAIAN PEMBELAJARAN ANAK
Authors: Alya Hasyim Mutiara , Armanila  , Rahma Adlya Zahra  , Salsabilah  , Yola Adela Sindy
Published: November 2023

Pendidikan anak usia dini (PAUD) memainkan peran penting dalam membentuk perkembangan anak pada tahap awal kehidupan mereka. Kebijakan Administrasi PAUD telah diimplementasikan dengan tujuan meningkatkan kualitas pendidikan PAUD dan, oleh karena itu, capaian pembelajaran anak. Penelitian ini mengkaji dampak positif kebijakan administrasi PAUD terhadap perkembangan anak dan proses pembelajaran, dengan fokus pada TK Al-Kausar sebagai studi kasus. Temuan menunjukkan peningkatan kualifikasi tenaga pengajar, pengembangan kurikulum yang efektif, dan peningkatan aksesibilitas sebagai dampak positif utama. Namun, tantangan seperti alokasi sumber daya yang cukup dan pemantauan implementasi masih perlu diatasi. Penelitian ini menggunakan pendekatan kualitatif dengan metode analisis dokumentasi, wawancara, dan observasi untuk mengumpulkan data dari TK Al-Kausar Hasil penelitian menunjukkan bahwa, kebijakan administrasi PAUD memiliki dampak positif yang signifikan dalam memajukan pendidikan anak usia dini, sambil menghadapi beberapa kendala yang memerlukan perhatian lebih lanjut.
PENGEMBANGAN MEDIA SCRAPBOOK BERBASIS INQUIRY PADA MATERI FLORA DAN FAUNA DI KELAS IV SD
Authors: Manik Devita Yetti , Sukmawarti
Published: November 2023

Motivated by the learning media used in the science learning process, especially on Flora and Fauna material, still using printed teaching materials, teaching staff still using the lecture method, lack of students' understanding of flora material. and fauna, decreased interest and motivation for learning, and a lack of use of learning media in the classroom. This researcher aims to design inquiry-based scrapbook media on class IV elementary school flora and fauna material and to determine the feasibility of developing inquiry-based scrapbook media on class IV flora and fauna material SD. Product development in this research uses the ADDIE development model. This method and model was chosen because it aims to produce an inquiry-based scrapbook media product on flora and fauna material in class IV elementary school. The subject of the trial was a class IV teacher at UPT SD Negeri 104211 Marindal with material on flora and fauna. The object of this research was inquiry-based scrapbook media. This research uses a questionnaire as a tool to test the feasibility of inquiry-based scrapbook media through validation by media experts, material experts, teacher responses and student responses. Qualitative data is obtained from the formula used to determine the suitability of media and materials. The data obtained is used as a reference for making revisions to the products being developed. Based on the calculations above, the results of the overall assessment of the material experts reached the instrument used to collect data, namely a questionnaire. The validation results for inquiry-based scrapbook media were media expert validation obtained 76% with appropriate criteria, material expert validation obtained a score of 76% with suitable criteria for use, teacher response obtained a score of 92.5% with very suitable criteria for use and student responses obtained a score of 93.3 % with criteria that are very suitable for use. Based on the data obtained, it can be concluded that inquiry-based scrapbook media can improve learning outcomes for fourth grade elementary school students. Can improve class IV learning outcomes at UPT SD Negeri 104211 Marindal 4.
PENGARUH KELUARGA DALAM MEMBENTUK ETIKA DAN MORAL ANAK SEKOLAH DASAR
Authors: Mida Triana Zahrah  , Nana Hendracipta  , Siti Rokmanah
Published: November 2023

Dalam rangka membangun masyarakat berkualitas, pentingnya membangun etika dan moral yang kuat. Namun, ketika pendidikan moral dan etika diabaikan, kemungkinan perilaku egois dan individualistik muncul. Penelitian ini bertujuan mendalamkan pemahaman mengenai peran orang tua dalam membentuk karakter anak, fokusnya pada aspek etika dan moral. Dalam penelitian ini, menggunakan metode tinjauan pustaka. Sikap orang tua yang otoriter mendorong patuh tanpa pemahaman, sedangkan sikap terlalu bebas menghasilkan anak yang kurang tanggung jawab dan tidak mematuhi norma sosial. Oleh karena itu, dianjurkan agar orang tua memberikan kasih sayang, keterbukaan, kehati-hatian, dan konsistensi dalam mendidik anak.
THE ROLE OF DUOLINGO APPLICATION TO IMPROVE STUDENTS’ VOCABULARY MASTERY AT JUNIOR HIGH SCHOOL IN ACADEMIC YEAR 2023/2024
Authors: Shinta Shofia Ananda  , Arso Setiaji  , Indri Kustantinah
Published: November 2023

ABSTRACT

Learning is essential; we must comprehend technology in today's fast-paced technological society. Regarding education, it is very simple for us to learn a new language using our cell phones. Duolingo is a language-learning program that allows students to learn English through translation, comparing, dictation, fill-in-the-blank, speaking, listening, multiple choice, and competition. Therefore, this research analyses the implementation of Duolingo in language learning and its potential for facilitating the full development of the English language. The study discovered that using the Duolingo application was highly successful at strengthening students' interest in learning English: two classes, each containing 30 students who participated. Two groups, the experimental class and the control class, are involved in this investigation. Based on this study, Duolingo is an app where any newcomer can begin learning an additional language because it encourages them to keep learning.

Keywords: Duolingo application; Vocabulary, Educational Language Tool
Joseph Ruhomon's India
Authors: Seecharan Clem
Published: November 2023

This reissue of an 1894 pamphlet celebrates Joseph Ruhomon as the first Indian intellectual in British Guiana, now Guyana. He wrote at a time, Seecharan notes, when self-deprecation was an instinct...and the construction of this essay was an admirable accomplishment.
Jamaica Underground
Authors: Fincham Alan G.
Published: November 2023

This is an extensive update of the author's similar 1977 book. A catalog of some 800 cave and karst features follows a collection of articles on caving history, geology, and biology, some by seven other contributors. The catalog gives the location of each cave, and there are hundreds of cave maps (some foldouts), as well as lists of long and deep caves and 16 pages of color plates.
King Yellowman
Authors: Hagerman Brent
Published: November 2023

Jamaican deejay Yellowman divided a country with his bawdy songs and his very body: he has been wildly popular among dancehall fans, yet widely despised by polite society. Even though his contribution to Jamaican musical culture is immense, scholars have ignored him and reggae histories have largely misunderstood him. King Yellowman: Meaningful Bodies in Jamaican Dancehall Culture is the first serious study of one Jamaica's most significant artists and dancehall’s first major international star. It is a critical biography designed to satisfy fans while furthering academic discourse on dancehall by offering a new perspective on the way Yellowman negotiates the slackness/culture binary in Jamaican music. Based on years of ethnographic fieldwork, Brent Hagerman begins with the compelling story of Winston Foster’s early life as an abandoned ghetto outcast and his hard-fought journey to become the King of Dancehall, then goes on to a critical exploration of the marginalization of people with albinism in Jamaica and the use of slackness in Caribbean music. Through slackness and his mobilization of Rastafarian symbols, Yellowman subverts embedded Jamaican cultural notions of sexuality, gender, and race to overcome his cultural displacement, promote his yellow body as sexually appealing and forge a place for himself among the Jamaican body politic.
Error Analysis Using Three and Four Stage Eighth Order Embedded Runge-Kutta Method for Sixth Order Ordinary Differential Equation vvi(u)=f(u,v,v',v'',v''',viv)
Authors: Kaur Manpreet , Kumar Sangeet , Bhatti Jasdev
Published: November 2023

The present paper aims at providing an insight to embedded Runge-Kutta sixth order (RKSD) ordinary differential equation method for solving the initial value problem of order six of type vvi(u) = f(u, v, v', v'',v''',viv). The concept of order conditions for the three and four stages up to the eighth and ninth orders, respectively, is designed and evaluated; furthermore, the zero-stability of the proposed method is proved. Comparisons are made between these orders with the help of a mathematical example, and global and local truncated error norms are evaluated.
Analysis of Batch Arrival General Service Queue with Balking, Feedback and Second Optional Service
Authors: Vijaya Laxmi P , Qrewi Hasan A , George Andwilile A
Published: November 2023

This paper aims to analyze the steady-state behavior of bulk input general service queue with a second optional service (SOS), balking, and feedback facility. In this study, the server provides two kinds of services such as first essential service (FES) and SOS. The FES is provided to all arriving customers to the system while SOS is only to those customers who demand additional service. When the customer completes FES and is not satisfied with the service, he may choose to rejoin the queue (feedback) or opt for SOS or depart from the system with a certain probability. We have computed the probability-generating function of the queue-length distribution after converting the non-Markovian to Markovian process by using a supplementary variable technique. This technique is used to solve the non-Markov queue model by taking the elapsed service times as the supplementary variable so that the process becomes Markovian. This study contributes to filling the gap in the analysis of batch arrival general service queues with balking, feedback, and SOS. Furthermore, we have presented the numerical results and cost optimization. The results reveal that the higher service rate in both FES and SOS helps the system manager to run the system effectively. Similarly, in cost optimization, the system manager should make emphasize choosing optimal service rates to have a cost-benefit and less congestion in the queueing system.
Development and Application of an Integrated BIM-GIS System for the Energy Management of Buildings
Authors: Barrile Vincenzo , Genovese Emanuela , Favasuli Francesco
Published: November 2023

Urban planning and land cover management represent crucial challenges in the design and sustainable development of cities from the perspective of energy management. This article presents a methodology for integrating Building Information Modeling (BIM) and Geographic Information Systems (GIS) as an advanced tool for building energy management, allowing to combine detailed information about the physical aspects of the building with geospatial and environmental data. While BIM enables the integrated design, construction, and management of buildings and infrastructure, GIS provides spatial analysis based on geographical data. However, integrating these two approaches is complex, particularly regarding data formats, scale, and accuracy. This study, therefore, presents the application of a new integration environment, Autodesk InfraWorks, which combines Autodesk Revit and ArcGIS for a complete visualization of models in a GIS context. Illustrating the implementation of this approach in an energy efficiency project in the Municipality of Reggio Calabria (Italy), this article demonstrates how the convergence of BIM and GIS can improve urban planning and land cover management, promoting sustainable development practices in the city. This integration has the potential to significantly benefit urban power systems by offering a holistic view of building energy management within a broader urban context. It enables urban planners to make informed decisions that consider energy efficiency, environmental sustainability, and overall urban development, leading to a more efficient and resilient power system.
Pessanha correspondente: a máscara do melancólico
Authors: Frasson Fusco Felipe , Maciel da Silva Telma
Published: November 2023

O trabalho visa a leitura de parcela da produção epistolar, em especial a correspondência com Carlos Amaro, do poeta português Camilo Pessanha. Em 1908, seu irmão Manuel é internado por razões psiquiátricas no Porto, e sua sombra passa à correspondência do poeta. O tom de comiseração consigo próprio se acentua, acompanhado de um discurso melancólico. Buscamos analisar tal discurso, valendo-nos tanto de bibliografia a respeito da escrita epistolar, Diaz (2016) e Haroche-Bouzinac (2016), bem como de Starobinski (2016) sobre a melancolia. Concluímos que Pessanha frequentemente constrói sua autoimagem como vítima da melancolia, especialmente atrelando-a à figura fraterna.
Dos arquivos invisíveis de escritoras sáficas: o caso de Renée Vivien, Judith Teixeira e Eunice Peregrina de Caldas
Authors: Oliveira da Silva Julie
Published: November 2023

No período em que se considera o fim da Belle Époque – período marcado, de uma parte, pelo florescimento artístico e literário, mas, por outro lado, pelos diversos conflitos políticos nacionais e internacionais –, pouco a pouco, grande parte da cena literária se enfraquece, especialmente a dos escritos homoeróticos e femininos, ditos sáficos, devido à repressão e aos movimentos de censura entre 1920-1930. Mas além do literário, atestamos um desaparecimento quase total de documentos de ordem primária relacionados a algumas dessas escritoras. Este mesmo quadro se repete seja na França, dos documentos relacionados à Renée Vivien (1877-1909); seja em Portugal, relacionados à Judith Teixeira (1888-1959); seja no Brasil, relacionados à Eunice Peregrina de Caldas (1879-1967). Em diversos níveis, o acesso aos espólios dessas autoras é, senão limitado, completamente inexistente. Este artigo se propõe a refletir sobre a “scavenger methodology” proposta por Halberstam (2018) como processo de reconstrução a fim de preencher algumas lacunas biobibliográficas.
Menyoal Framework Agama: Upaya Rekonsiliasi HAM Berat 1965
Authors: Indra Doris Yulius Edward
Published: November 2023

The author's focus in this article is to question the religious framework in viewing the 1965 gross human rights case as one of the reconciliation efforts. Reconciliation of 1965 Gross Human Rights is an important effort to build peace and unity in Indonesia, especially in facing the political year. It is also important for the creation of peaceful politics. However, this effort faces challenges, one of which is the religious framework in viewing the 1965 Gross Human Rights case. The method used in this analysis is a historical study of the 1965 gross human rights violations case, especially regarding the role and involvement of religions in responding to this case. This article offers a religious framework that is more inclusive and emphasizes the characteristics of a religion of peace and love. This framework is based on the principles of humanity, justice and equality. The findings of this research are a new framework of religion that is broader and more open in viewing the 1965 Gross Human Rights Case that emphasizes love. This new framework is the basis for reconciliation for the Indonesian people. It is hoped that from this new framework, all elements of the nation can accept it so that the 1965 Gross Human Rights case has the same perspective in terms of religion. This is expected to bring political stability in Indonesia and free the Indonesian people from the 1965 Serious Human Rights issue.
Qualidade dos grãos de soja colhidos mecanicamente com plataformas de corte em áreas com e sem dessecação
Authors: Barcelos Matheus Rafael Vaz , Compagnon Ariel Muncio , Vale Luís Sérgio Rodrigues , Rosa Neto Nilson Dias , Araujo Daniel Pereira de
Published: November 2023

A colheita da soja é uma das etapas mais importantes do ciclo produtivo da cultura e o uso crescente de tecnologias mais complexas em máquinas agrícolas está ligado ao seu sucesso. O uso de dessecantes para a antecipação da colheita tem ajudado na colheita dos grãos. O objetivo do trabalho foi avaliar de maneira qualitativa a colheita de soja dessecada e não dessecada a partir de máquinas com duas diferentes plataformas de corte: convencional e draper. O experimento foi conduzido no município de Nova Crixás - GO, em delineamento inteiramente casualisado, em arranjo fatorial 2x2, com duas colhedoras com diferentes tipos de plataforma de corte (convencional e draper) e dois manejos da área (dessecada e não dessecada), utilizando quatro repetições por tratamento. As variáveis analisadas foram: pureza, massa de mil sementes, teor de água dos grãos, germinação, grãos rachados, grãos quebrados, grãos bandinha e grãos inteiro. Não houve interação entre as variáveis analisadas. A plataforma de corte draper proporcionou melhores qualidades físicas e fisiológicas dos grãos de soja que o modelo de plataforma convencional (caracol). A soja dessecada apresentou melhores resultados em comparação à soja não dessecada. Por ter um período de 5 dias a mais de acúmulo de matéria seca, a soja não dessecada apresentou uma massa de mil grãos superior à soja dessecada. Porém, quando comparado seus resultados de grãos rachados e quebrados, não viabiliza a colheita de soja sem o processo de dessecação, evitando tais perdas.
SOCIEDADE LIMITADA: AUTONOMIA PATRIMONIAL E CONDUTAS QUE ADMITEM A EXCLUSÃO DE SÓCIO
Authors: BELLE HELENA BEATRIZ DE MOURA , Silva Amanda Moreira
Published: November 2023

No presente artigo tem-se por objetivo o estudo da atual disciplina de dissolução parcial em sociedades limitadas, fundamentada pela exclusão de sócio no direito brasileiro, tendo em vista o impacto da Lei nº 10.406, de 10 de janeiro de 2002 e alterações com a declaração de direitos de liberdade econômica e garantias de livre mercado. Revelou-se importante analisar o tratamento normativo que o Poder Judiciário do Estado de Goiás tem utilizado para definir quais as hipóteses motivadoras para o afastamento de cotista, uma vez que já se encontra pacificado pela doutrina e jurisprudência que a mera quebra da affectio societatis não é suficiente para justificar a exclusão de um sócio, sendo necessária justa causa, caracterizada por conduta grave que prejudique diretamente a continuidade da atividade social. A produção foi orientada pelos métodos dialético e hipotético dedutivo, metodologia de pesquisa qualitativa e técnicas de estudos em fontes primárias e secundárias, também, bibliográficas do direito, o que permitiu análise e interpretação de leis, doutrinas e julgados recentes. O estudo evidenciou que diante da ausência de rol taxativo para se verificar ações que prejudiquem o prosseguimento regular da atividade empresarial torna-se necessária a averiguação de provas que possam dar segurança nas decisões e, assim, averiguar condutas como ausência de cooperação e lealdade, abandono da sociedade e gestão temerária, descumprimento de obrigações e falta de prestação de contas etc., podendo ocasionar violação grave dos deveres sociais que justifiquem a exclusão de determinado investidor, o que gera sérios conflitos de modo a inviabilizar o negócio e impedir a longevidade empresarial.
Writing for Children in the Era of Chinese Exclusion: Yan Phou Lee and
When I Was a Boy in China
Authors: Duvall J. Michael
Published: November 2023

Yan Phou Lee’s
When I Was a Boy in China
(1887), the first known book by an Asian published in the United States, was not written as such, but as a series of articles for
Wide Awake
, a children’s magazine, while Lee, a former Chinese Educational Mission student, finished his education at Yale College. This article considers Lee’s book in light of his purposeful work to become a writer in the service of the Chinese and reads it within the context of a children’s periodical market rife with writing centred on the real and imagined lives of children in other locations – geographic, social, racial, and ethnic. Lee developed a critique of the wonder cultivated and capitalized on by Orientalist representation, and he brought this critique to bear as he wrote for children in the era of Chinese exclusion.
Corrected SFD: A More Accurate Galactic Dust Map with Minimal Extragalactic Contamination
Authors: Chiang Yi-Kuan
Published: November 2023

The widely used Milky Way dust-reddening map, the Schlegel–Finkbeiner–Davis (SFD) map, was found to contain extragalactic large-scale structure (LSS) imprints. Such contamination is inherent in maps based on infrared emission, which pick up not only Galactic dust but also the cosmic infrared background (CIB). When SFD is used for extinction correction, overcorrection occurs in a spatially correlated and redshift-dependent manner, which could impact precision cosmology using galaxy clustering, lensing, and Type Ia supernova distances. Similarly, LSS imprints in other Galactic templates can affect intensity mapping and cosmic microwave background experiments. This paper presents a generic way to remove LSS traces in Galactic maps and applies it to SFD. First, we measure descriptive summary statistics of the CIB in SFD by cross-correlating the map with spectroscopic galaxies and quasars in the Sloan Digital Sky Survey tomographically as functions of redshift and angular scale. To reconstruct the LSS on the map level, however, additional information on the phases is needed. We build a large set of 180 overcomplete, full-sky basis template maps from the density fields of over 600 million galaxies in the Wide-field Infrared Survey Explorer and find a linear combination that reproduces all of the high-dimensional tomographic two-point statistics of the CIB in SFD. After subtracting this reconstructed LSS/CIB field, the end product is a full-sky Galactic dust-reddening map that supersedes SFD, carrying all Galactic features therein, with maximally suppressed CIB. We release this new dust map dubbed CSFD—the corrected SFD—at https://idv.sinica.edu.tw/ykchiang/CSFD.html and NASA’s LAMBDA archive.
Dwarf Galaxies with the Highest Concentration Are Not Thicker than Ordinary Dwarf Galaxies
Authors: Chen Lijun , Zhang Hong-Xin , Lin Zesen , Chen Guangwen , Tao Bojun , Liang Zhixiong , Lin Zheyu , Kong Xu
Published: November 2023

The formation mechanism of high-concentration dwarf galaxies is still a mystery. We perform a comparative study of the intrinsic shape of nearby low-mass galaxies with different stellar concentration. The intrinsic shape is parameterized by the intermediate-to-major axis ratios B/A and the minor-to-major axis ratios C/A of triaxial ellipsoidal models. Our galaxies (107.5
M
⊙ < M
⋆ < 1010.0
M
⊙) are selected to have spectroscopic redshift from SDSS or GAMA and have broadband optical images from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) wide-layer survey. The deep HSC-SSP images allow to measure the apparent axis ratios q at galactic radii beyond the central star-forming area of our galaxies. We infer the intrinsic axis ratios based on the q distributions. We find that (1) our galaxies have typical intrinsic shape similarly close to be oblate (μ
B/A ∼ 0.9–1), regardless of the concentration, stellar mass, star formation activity, and local environment (being central or satellite); (2) galaxies with the highest concentration tend to have intrinsic thickness similar to or (in virtually all cases) slightly thinner (i.e., smaller mean μ
C/A or equivalently lower triaxiality) than ordinary galaxies, regardless of other properties explored here. This appears to be in contrast with the expectation of the classic merger scenario for high-concentration galaxies. Given the lack of a complete understanding of dwarf–dwarf merger, we cannot draw a definite conclusion about the relevance of mergers in the formation of high-concentration dwarfs. Other mechanisms such as halo spin may also play important roles in the formation of high-concentration dwarf galaxies.
[C ii] Spectral Mapping of the Galactic Wind and Starbursting Disk of M82 with SOFIA
Authors: Levy Rebecca C. , Bolatto Alberto D. , Tarantino Elizabeth , Leroy Adam K. , Armus Lee , Emig Kimberly L. , Herrera-Camus Rodrigo , Marrone Daniel P. , Mills Elisabeth , Ricken Oliver , Stutzki Juergen , Veilleux Sylvain , Walter Fabian
Published: November 2023

M82 is an archetypal starburst galaxy in the local Universe. The central burst of star formation, thought to be triggered by M82's interaction with other members in the M81 group, is driving a multiphase galaxy-scale wind away from the plane of the disk that has been studied across the electromagnetic spectrum. Here, we present new velocity-resolved observations of the [C ii] 158 μm line in the central disk and the southern outflow of M82 using the upGREAT instrument on board SOFIA. We also report the first detections of velocity-resolved (ΔV = 10 km s−1) [C ii] emission in the outflow of M82 at projected distances of ≈1–2 kpc south of the galaxy center. We compare the [C ii] line profiles to observations of CO and H i and find that likely the majority (>55%) of the [C ii] emission in the outflow is associated with the neutral atomic medium. We find that the fraction of [C ii] actually outflowing from M82 is small compared to the bulk gas outside the midplane (which may be in a halo or tidal streamers), which has important implications for observations of [C ii] outflows at higher redshift. Finally, by comparing the observed ratio of the [C ii] and CO intensities to models of photodissociation regions, we estimate that the far-ultraviolet (FUV) radiation field in the disk is ∼103.5
G
0, in agreement with previous estimates. In the outflow, however, the FUV radiation field is 2–3 orders of magnitudes lower, which may explain the high fraction of [C ii] arising from the neutral medium in the wind.
Khronometric Theories of Modified Newtonian Dynamics
Authors: Flanagan Éanna. É.
Published: November 2023

In 2011 Blanchet and Marsat suggested a fully relativistic version of Milgrom's modified Newtonian dynamics in which the dynamical degrees of freedom consist of the spacetime metric and a foliation of spacetime, the khronon field. This theory is simpler than the alternative relativistic formulations. We show that the theory has a consistent nonrelativistic or slow-motion limit. Blanchet and Marsat showed that in the slow motion limit, the theory reproduces stationary solutions of modified Newtonian dynamics. We show that these solutions are stable to khronon perturbations in the low acceleration regime, for the cases of spherical, cylindrical, and planar symmetry. For nonstationary systems in the low acceleration regime, we show that the khronon field generally gives an order unity correction to the modified Newtonian dynamics. In particular, there will be an order unity correction to the MOND version of Kepler's third law, potentially relevant to ongoing efforts to test MOND using GAIA observations of wide binaries.
Rotation of a Stealth CME on 2012 October 5 Observed in the Inner Heliosphere
Authors: Kumar Sandeep , Hegde Dinesha V. , Srivastava Nandita , Pogorelov Nikolai V. , Gopalswamy Nat , Yashiro Seiji
Published: November 2023

Coronal mass ejections (CMEs) are subject to changes in their direction of propagation, tilt, and other properties. This is because CMEs interact with the ambient solar wind and other large-scale magnetic field structures. In this work, we report on the observations of the 2012 October 5 stealth CME using coronagraphic and heliospheric images. We find clear evidence of a continuous rotation of the CME, i.e., an increase in the tilt angle, estimated using the graduated cylindrical shell (GCS) reconstruction at different heliocentric distances, up to 58 R
⊙. We find a further increase in the tilt at L1 estimated from the toroidal and cylindrical flux rope fitting on the in situ observations of interplanetary magnetic field (IMF) and solar wind parameters. This study highlights the importance of observations of Heliospheric Imager (HI), on board the Solar Terrestrial Relations Observatory. In particular, the GCS reconstruction of CMEs in the HI field of view promises to bridge the gap between the near-Sun and in situ observations at the L1. The changes in the CME tilt have significant implications for the space weather impact of stealth CMEs.
Secondary Outflow Driven by the Protostar Ser-emb 15 in Serpens
Authors: Sato Asako , Tokuda Kazuki , Machida Masahiro N. , Tachihara Kengo , Harada Naoto , Yamasaki Hayao , Hirano Shingo , Onishi Toshikazu , Matsushita Yuko
Published: November 2023

We present the detection of a secondary outflow associated with a Class I source, Ser-emb 15, in the Serpens Molecular Cloud. We reveal two pairs of molecular outflows consisting of three lobes, that is, primary and secondary outflows, using Atacama Large Millimeter/submillimeter Array 12CO and SiO line observations at a resolution of ∼318 au. The secondary outflow is elongated approximately perpendicular to the axis of the primary outflow in the plane of the sky. We also identify two compact structures, Sources A and B, within an extended structure associated with Ser-emb 15 in the 1.3 mm continuum emission at a resolution of ∼40 au. The projected sizes of Sources A and B are 137 au and 60 au, respectively. Assuming a dust temperature of 20 K, we estimate the dust mass to be 2.4 × 10−3
M
⊙ for Source A and 3.3 × 10−4
M
⊙ for Source B. C18O line data imply rotational motion around the extended structure, but we cannot resolve rotational motion in Source A and/or B because the angular and frequency resolutions are insufficient. Therefore, we cannot conclude whether Ser-emb 15 is a single or binary system. Thus, either Source A or Source B could drive the secondary outflow. We discuss two scenarios that might explain the driving mechanism of the primary and secondary outflows: the Ser-emb 15 system is (1) a binary system composed of Sources A and B, or (2) a single-star system composed of Source A alone. In either case, the system could be a suitable target for investigating the disk and/or binary formation processes in complicated environments. Detecting these outflows should contribute to understanding complex star-forming environments, which may be common in the star formation processes.
Pyroptosis and necroptosis inhibitor necrosulfonamide ameliorates lipopolysaccharide-induced inflammatory hyperalgesia in mice
Authors: Ozgen Beyza , Senol Sefika Pinar , Yilmaz Dilsah Ezgi , Temiz-Resitoglu Meryem , Bahceli Omer , Tunctan Bahar
Published: November 2023

Objectives: This study aimed to investigate the effect of the gasdermin D (GSDMD) and mixed lineage kinase domain-like pseudokinase (MLKL) inhibitor, necrosulfonamide (NSA), on lipopolysaccharide (LPS)-induced hyperalgesia in mice.

Methods: Reaction time to a thermal stimulus within 30 seconds was measured in male mice injected with saline, LPS, and/or NSA after 6 hours using the hot plate test. Immunoblotting studies were performed to determine changes in caspase-11/GSDMD-mediated pyroptosis, receptor-interacting serine/threonine-protein kinase (RIPK) 1/RIPK3/MLKL necrosome-mediated necroptosis, demyelination, and remyelination in the brains and spinal cords of animals.

Results: NSA demonstrated significant antinociceptive activity compared with LPS-treated mice. In the tissues of LPS-treated mice, NSA decreased expression of caspase-11 p20, p30-GSDMD, interleukin-1β, high-mobility-group-box 1, and semaphorin 3A, and activity of RIPK1, RIPK3, and MLKL. NSA also increased the expression of myelin proteolipid protein.

Conclusion: Therefore, NSA may have therapeutic potential in the treatment of inflammatory painful conditions due to bacterial infections.
Une analyse dynamique du système de contrôle de gestion de la firme post-soviétique
Authors: Paladi Irina
Published: November 2023

Cet article traite de l’évolution des systèmes de contrôle de gestion (SCG) durant la transition post-soviétique. Deux études de cas sur des entreprises « du monde d’avant » et toujours existantes caractérisent le SCG de l’économie planifiée et les transformations induites par le passage à l’économie de marché. Nos résultats montrent qu’à partir du même point de départ – un SCG centralisé et déployé dans toutes les entreprises soviétiques, vecteur cérémoniel et opérationnel de la stratégie du Parti communiste, – la transition détermine divers degrés de changement dans le SCG des entreprises. La chute de l’URSS se traduit par la disparition des systèmes formels et le maintien des outils informels. La réintroduction des SCG résulte de contraintes exercées par des partenaires étrangers. La transformation des SCG en outil de pilotage, bien que limitée, s’explique principalement par la diffusion des connaissances en contrôle de gestion et le changement du mode de gestion des entreprises.
Assessment of agricultural practices by Ethiopian women farmers: existence of gender disparities in access to mycotoxins training
Authors: Cervini C. , Abegaz B. , Mohammed A. , Elias R. , Medina A. , Gebre K. , Verheecke-Vaessen C.
Published: November 2023

Ethiopia is one of the countries with the lowest gender-equality performance in sub-Saharan Africa being ranked 121/134 in terms of the magnitude and scope of gender disparities by the United Nations Women’s Organisation. Within the farming communities, women represent 70% of the labour force, but they are neglected from accessing training events run by Ethiopian Universities (e.g. Haramaya University). A survey to assess the existence of gender disparities among Ethiopian women farmers with respect to agricultural labour and mycotoxins knowledge was conducted on three hundred and forty-nine women from the Oromia and Amhara regions. A higher illiteracy rate was found in women compared to men from both Oromia and Amhara regions. Women played a key role in agricultural activities while having limited access to modern technologies compared to their male counterparts. Women were mainly responsible for sorting spoiled crops. Especially in Amhara, these were intended for home consumption, representing a serious health risk for local people. Overall, women from Amhara were more aware than women from Oromia about what mycotoxins are (e.g. aflatoxins), their impact and risk of occurrence in crops. Women in Amhara were also more intended to act towards mycotoxins in the future compared to women from Oromia. Only 0.24% of women have previously attended a training on mycotoxins. The radio seemed to be the most efficient way to deliver training to Ethiopian women farmers from these regions. Mycotoxins trainings were the second option of choice by all women surveyed. Such findings clearly stated the existence of gender inequality in the two Ethiopian regions considered. Empower women’s knowledge about mycotoxins will not only benefit agricultural income and the national economy, but it will also provide women the recognition they equally deserve alongside their male counterparts in future agricultural training programs and interventions.
Sustained Effect of Simulation-Based Resuscitation Education on Knowledge, Self-Confidence, and Performance Ability of Neonatal Intensive Care Unit Nurses
Authors: Lim Cho Yeon , Song Mi Ryeong
Published: November 2023

Background:

Simulation education is essential for the development of nurses' practical skills. This study evaluated the impact and duration of simulation-based neonatal resuscitation education on the knowledge, self-confidence, and performance ability of neonatal intensive care unit (NICU) nurses.

Method:

This quasi-experimental study was conducted in South Korea and included 35 NICU nurses working in tertiary hospitals between August and October 2021. Simulation-based neonatal resuscitation education (NRE) was provided for 80 minutes, and its effectiveness was measured in terms of nurses' knowledge, self-confidence, and performance ability. Data collection was conducted before, 1 week after, 3 weeks after, and 5 weeks after the training, and the collected data were calculated and analyzed using a
t
test and repeated measures analysis of variance.

Results:

Simulation-based NRE improved knowledge, self-confidence, and performance in neonatal resuscitation. Performance ability showed greater improvement than knowledge or self-confidence, and all three areas showed significant differences in score changes over time.

Conclusion:

The duration of the training effect should be considered an important factor.

[
J Contin Educ Nurs.
2024;55(2):79–86.]
Designing a Smart Classroom Based on a Multi-Screen Interactive Learning System for Improving Student Satisfaction
Authors: Dai Zhicheng , Zhu Fuming , Zhao Liang , Xiong Junxia , Zhu Xiaoliang
Published: November 2023

There are several issues with traditional classroom teaching, including the sporadic presentation of lecture materials, the reliance on a single, traditional teaching method, and a lack of student engagement and initiative. These problems seriously impact the quality of engineering education. Combining the advantages of mobile learning and multi-screen displays, this paper proposes a smart classroom architecture based on a multi-screen interactive learning system (MSILS). The proposed smart classroom system supports students in conducting learning activities in a multi-screen learning environment. Its goal is to enhance interaction and increase student satisfaction in engineering classroom learning. For the evaluation, an experiment was conducted in a science and engineering-related course at a university in China. The research results show that students who received instruction with the proposed system reported higher satisfaction in four areas: information technology, teaching methods, perceived value, and learning satisfaction. Approximately 90% of the 629 undergraduate students who participated in the experiment expressed their desire to continue their studies in this smart classroom. This indicates that students are more interested, expectant, helpful, and engaged in the target courses they are taking after using the smart classroom system.
Examining the Factors Influencing Students’ Satisfaction with Hackathon for IT Projects
Authors: Oyetade Kayode Emmanuel , Harmse Anneke , Zuva Tranos
Published: November 2023

Education-related hackathons provide a dynamic and participatory method of teaching where students take an active role and become inventors and problem solvers. It encourages teamwork, critical thinking, and the use of technology, preparing students for the demands of the workforce of the twenty-first century. Although it has played a significant role in changing enterprises and society at large, its impact on academia has not yet been adequately examined. Studying the factors influencing student satisfaction with the use of hackathons for teaching and learning is crucial and pertinent given that South African educational institutions are still in the early phases of employing hackathons. The study sought to determine the factors that contributed to students’ satisfaction with hackathons for IT project. To achieve the goal, a model incorporating the self-efficacy and satisfaction constructs with TAM variables (perceived usefulness (PU), perceived ease of use (PEOU), and behavioral intention (BI)) was developed. To test the model, an online questionnaire-based survey was carried out on 180 IT students who had taken part in a hackathon. Exploratory factor analysis was performed to assess the validity of the results, while Cronbach’s alpha was used to assess reliability. The hypothesis in the suggested model was verified by using correlation to assess relationships between the constructs, while linear regressions were utilized to assess influences between variables. The Pearson correlation result showed that self-efficacy and behavioral intention have a moderately positive and statistically significant relationship with student satisfaction when using hackathon for IT projects, and the regression analysis revealed that students’ use of hackathons for IT projects is positively influenced by perceived usefulness and self-efficacy. The study identified factors that were positively correlated with and impacted students’ satisfaction with the use of hackathon for IT projects, which forms the primary contribution of this research work. By enabling a form of social learning where knowledge is created among students, the use of hackathon for IT projects will help change the learning environment from a teacher-centered to a learner-centered one.
A Classification and Retrieval System for Learning Resources of MOOC
Authors: Zhang Ye
Published: November 2023

In this information age, massive open online courses (MOOCs) have become an integral component of modern education. These courses encompass a wide range of resources, such as videos, audios, texts, and other forms. An accompanying question is how to effectively organize, classify, and retrieve these resources. However, currently available classification and retrieval methods are mostly based on text retrieval technologies. As a result, multi-modal resources such as videos and audios are often ignored or incorrectly classified. Furthermore, more current methods exhibit low efficiency when processing the vast amount of data in MOOCs. To address and solve these issues, this study focuses on the extraction and fusion of multi-modal features of MOOC resources. It proposes an efficient classification and retrieval method based on 3D convolution, aiming to offer a more accurate and efficient approach for classifying and retrieving MOOC resources.
Online Sharing Mechanism of Teaching Resources from the Perspective of Knowledge Management
Authors: Shan Yumei
Published: November 2023

With the rapid development of network technology, online sharing of teaching resources has gained widespread attention in the educational field. This sharing not only provides educators and learners with rich learning resources but also opens up new channels for knowledge innovation and dissemination. However, it remains a major challenge to efficiently manage, allocate, and evaluate these resources. Existing research methods often rely too heavily on traditional knowledge management theories and overlook the characteristics of online environments. This research aimed to study and propose a new online sharing mechanism for teaching resources from the perspective of knowledge management. This study provided a new theoretical framework and practical strategy for online sharing of teaching resources by completing the knowledge management system based on the TransCat model, introducing the online sharing algorithm of Double Deep Q-Network (DDQN), and using the resource effectiveness evaluation considering knowledge potential differences.