bluuebunny/crossref_metadata_2025 huggingface dataset:
Intellectual biography of Latin American academics II
Authors:   Universidad Pedagógica Nacional-Ajusco, Arteaga-Castillo Belinda , Santillán-Nieto Marcela ,   Universidad Pedagógica Nacional-Ajusco, Alvarado-Sánchez Martina ,   Benemérita Escuela Normal “Manuel Ávila Camacho”, Vélez-Castillo Raquel de Jesús ,   Universidad Nacional Autónoma de México
Published: February 2025

The text we present here constitutes a second partial report of the research Women in Science: intellectual biographies of Latin American academics, which aims to decipher the women who, from the scientific field, influence the development of knowledge. But how to identify the protagonists of these narratives? How to approach them? How to account for the plots they built to be what they decided to be? To answer these questions, mere descriptions of their lives are not enough, it is necessary to contact the deepest levels of their subjectivities that explain their uncertainties but also their certainties, their ruptures, and alliances as well as their most intimate convictions that led them to struggle against the current to carry out vigorous projects that impacted their time and context, sowing deep footprints that are worth recognizing and valuing. Under this logic, it is important to recognize, in dialogue with their intellectual biographies, their voices, their desires, their strength and their legacy. The starting point is to work on a methodology from a multidisciplinary perspective that combines social and cultural history with the gender perspective and intellectual biography. The objective is to show empowered women in the field of science.
O pastiche de Roberto Bolaño, autor de ficciones
Authors: Sales Paulo Alberto da Silva
Published: February 2025

After reading the fictional biography of “Ramírez Hoffman, o infame”, belonging to the work A literatura nazista na América (2019), we examined the presence of similar copies of this text in the pastiche rewriting of Estrela distante (2009). Bolaño, upon resuming the last chapter of his third book, he ends up doing, in the manner of Pierre Menard, autor de Quixote, by Borges (2007), a pamlipsest based on the appropriation of Hoffman’s biographical narrative. Through the repetition of similarities, which highlights the singularities of unique historical events, in Estrela distante, in our view, the pastiche highlights repetitions through differences by creating a supplement to Derridean writing. Finally, Bolaño’s pastiche is full of references to “ghosts” and imaginary books by authors who, together with the author/narrator, they remember traumas from the most violent dictatorship in the Southern Cone of the 1970s.
PENGARUH OPINION SHOPPING, DAN DEBT DEFAULT TERHADAP PENERIMAAN OPINI AUDIT GOING CONCERN
Authors: Munzir Munzir , Nurfatimah Uswatul Fajar , Nisak Kamila Maulidiya
Published: February 2025

Penelitian ini bertujuan untuk menilai secara empiris pengaruh Opinion Shopping, dan Debt Default terhadap Penerimaan Opini Audit Going Concern. Penelitian ini berjenis penelitian kuantitatif. Penarikan hipotesis penelitian menggunakan basis teori Agensi dan teori atribusi, didukung oleh penelitian-penelitian sebelumnya yang mempunyai kesamaan variabel. Sampel Penelitian yaitu 11 Perusahaan Pertambangan yang terdaftar di Bursa Efek Indonesia. Jenis data yang digunakan adalah data sekunder hasil pengumpulan dokumen laporan keuangan. Menggunakan teknik statistik deskriptif dan Regresi Logistik berbantuan SPSS 25.0 untuk analisis data. Selain itu  penelitian ini menggunakan uji kelayakan model regresi. Hasil penelitian menunjukkan bahwa secara parsial Debt Default berpengaruh positif terhadap Penerimaan Opini Audit Going Concern. Sedangkan Opinion Shopping secara parsial berpengaruh negatif terhadap Penerimaan Opini Audit Going Concern
Analisis Faktor-faktor yang mempengaruhi Kinerja Karyawan: Kompensasi, Motivasi Kerja, Lingkungan Kerja
Authors: Sanaba Hardiman F. , Andriyan Yoga , Munzir Munzir
Published: February 2025

Sumber Daya Manusia (SDM) merupakan manusia yang dipekerjakan di sebuah organisasi sebagai penggerak, pemikir dan perencana untuk mencapai tujuan organisasi. Kinerja merupakan hasil fungsi pekerjaan atau kegiatan seseorang dalam suatu organisasi yang dipengaruhi oleh berbagai faktor untuk mencapai tujuan organisasi dalam periode waktu tertentu. Kinerja adalah keberhasilan personel, tim atau unit organisasi dalam mewujudkan sasaran strategic yang telah ditetapkan sebelumnya dengan perilaku yang diharapkan. Penilitian ini bertujuan untuk menganalisis dan mengidentifikasi kajian literatur atau literatur review yang menggunakan dua puluh artikel ilmiah yang bersumber dari Mendley dan Scholar Google.  Penilitian ini menggunakan metode penilitian literature review dengan pendekatan desktiptif (descriptive literature review).  Faktor-faktor yang mempengaruhi kinerja karyawan adalah kompensasi, motivasi kerja, dan lingkungan kerja. Hasil penilitian menemukan bahwa terdapat (1) kompensasi memiliki pengaruh terhadap kinerja karyawan, (2) motivasi kerja memiliki pengaruh terhadap kinerja karyawan dan (3), lingkungan kerja memiliki pengaruh terhadap kinerja karyawan. Selain itu, tujuan penulisan  artikel  ini  guna  membangun  hipotesis  pengaruh antar  variabel  untuk  digunakan pada  riset  selanjutnya
PENGUNGKAPAN NILAI PERUSAHAAN: Penilaian Profitabilitas, Ukuran Perusahaan, dan Komite Audit
Authors: Syam Ayu Ashari
Published: February 2025

Penelitian ini bertujuan untuk menilai secara empiris pengaruh profitabilitas ukuran perusahaan dan komite audit terhadap nilai perusahaan sektor pertambangan di Bursa Efek Indonesia. Penelitian ini berjenis penelitian kuantitatif. Penarikan hipotesis penelitian menggunakan basis teori agensi dan teori signal, didukung oleh penelitian-penelitian sebelumnya yang mempunyai kesamaan variabel. Jenis data yang digunakan adalah data sekunder hasil akses data dalam publikasi BEI. Menggunakan teknik statistik deskriptif dan Regresi linear berganda berbantuan SPSS 25.0 untuk analisis data. Selain itu dalam menjaga normalitas dan mencegah hetersokedastisitas, penelitian ini menggunakan uji asumsi klasik. Hasil penelitian menemukan bahwa Profitabilitas berpengaruh positif dan signifikan terhadap nilai perusahaan sektor pertambangan di Bursa Efek Indonesia Ukuran perusahaan berpengaruh positif dan signifikan terhadap nilai perusahaan sektor pertambangan di Bursa Efek Indonesia dan Komite audit berpengaruh positif dan signifikan terhadap nilai perusahaan sektor pertambangan di Bursa Efek Indonesia
Analisis Sistem dan Prosedur Laporan Keuangan Panwas Distrik guna Mengukur Kinerja Laporan pada Bawaslu Kota Sorong Provinsi Papua Barat
Authors: J Kastanya James , Everlin Wamear Sheren
Published: February 2025

Penelitian ini bertujuan untuk mengetahui Analisis Sistem dan Prosedur Laporan Keuangan Panwas Distrik guna mengukur Kinerja Laporan pada Bawaslu Kota Sorong Provinsi Papua Barat Daya. Populasi dalam penelitian ini adalah 5 Panwas Distrik, Bendahara, Korsek Bawaslu,Staf teknis keuangan provinsi dan Staf teknis Bawaslu Kota Sorong. Pengambilan data ini menggunakan teknik wawancara,observasi, dan dokumentasi.Metode analisis data dalam penelitian ini menggunakan analisis SWOT.Hasil Penelitian ini menunjukan bahwa fungsi tugas dan sistem dan prosedur yang ada kaitannya dengan pelaporan dari Sekretariat dan Panwa Distrik belum maksimal, dan langsung diberi penilaian dari 10 Distrik yang ada masih 50% yang mampu dan mengerti akan tugas pertanggungjawaban Distrik.
Exploring the Cultural Significance of Sikiru Ayinde Barrister's Music: A Critical and Sociolinguistic Analysis
Authors: Abdulwaheed Shuaibu
Published: February 2025

Abstract: In this study, three songs by renowned Nigerian singer Sikiru Ayinde Barrister, a member of the Fuji music genre, are subjected to a critical and sociolinguistic analysis. "World," "Family Planning," and "Iku (Death)," which highlight various parts of Barrister's musical catalog, are the tracks that are being investigated. This research explores into the topic content, linguistic components, cultural references, storytelling tactics, and musical styles used by Barrister by examining the Yoruba versions of these songs. The analysis contributes to a better knowledge of Nigeria's musical history by offering insights into the social commentary, cultural identity, and aesthetic expression expressed in Barrister's music.
Role of NGOs in Enhancing Community Resilience: A Study on Three Climate Hotspots in Bangladesh
Authors: Md. Mafizur Rahman , Md. Khaled Sifullah , Md. Salman Sohel
Published: February 2025

This study aimed to explore the role of non-governmental organizations (NGOs) in enhancing community resilience in three climate hotspots in Bangladesh. The study adopted a qualitative interpretive phenomenological research approach in which the data were analyzed using NVivo- 12 software and the Granheim approach by thematic design. However, we chose the purposive sampling technique in this study and conducted 60 face-to-face in-depth interviews, 3 FGDs, and 11 KIIs with participant’s observation. The study found that NGOs played a crucial role in promoting access to social and economic opportunities, capacity development on climate action and disaster preparedness, and access to information. Sustainability issues and sustainable activities were also identified as critical areas where NGOs contributed to enhancing community resilience. A strong foundation of community-based organizations (CBOs) was necessary for effective NGO interventions. Furthermore, the study revealed that NGOs facilitated access to rights and fostered income-generating activities (IGAs) through market linkage, which enabled communities to adapt to changing climate conditions. NGOs played a crucial role in promoting the adoption of technology for climate adaptation, as well as nurturing Water, Sanitation, and Hygiene (WASH) enterprises. The findings could inform the development of effective policies and strategies to enhance community resilience in Bangladesh and other vulnerable areas. The findings of this study have significant policy implications for enhancing community resilience in vulnerable areas of Bangladesh. Policymakers should recognize and support the critical role of NGOs in enhancing community resilience and allocate adequate resources for their interventions.
SISTEM PAKAR DIAGNOSIS BALITA: FORWARD CHAINING DAN FUZZY MATCHING UNTUK VALIDASI GEJALA
Authors: Setiawan Iwan
Published: February 2025

Mendiagnosis penyakit pada balita sering kali menjadi tantangan bagi tenaga kesehatan, terutama ketika gejala yang muncul, seperti demam, batuk, dan pilek, memiliki kemiripan. Kesulitan ini semakin kompleks dengan adanya variasi cara orang tua mendeskripsikan gejala, seperti menyebut "pilek" dengan istilah "flu ringan" atau "hidung tersumbat." Perbedaan semantik ini sering kali menyebabkan ketidakpastian yang memengaruhi akurasi diagnosis, terutama jika hanya mengandalkan metode konvensional. Penelitian ini menawarkan solusi berupa pengembangan sistem pakar yang memadukan metode Forward Chaining dan Fuzzy Matching untuk meningkatkan keakuratan diagnosis. Teknologi Natural Language Processing (NLP) digunakan untuk mengenali gejala dari deskripsi teks yang diberikan pengguna, sementara Fuzzy Matching dirancang agar sistem mampu memproses input dengan toleransi terhadap kesalahan kecil dalam penulisan. Tingkat kepercayaan diagnosis dihitung menggunakan Certainty Factor (CF), yang memberikan bobot berdasarkan kesesuaian gejala. Pengujian menunjukkan bahwa sistem ini memiliki akurasi hingga 91% dan waktu pemrosesan yang singkat, rata-rata kurang dari 1 detik. Sistem ini diharapkan dapat menjadi alat bantu yang bermanfaat bagi tenaga kesehatan, terutama di daerah dengan akses terbatas ke dokter spesialis, sehingga mempercepat pengambilan keputusan yang tepat untuk kesehatan balita
Control of the assembly of fans of aircraft engines taking into account their icing
Authors:   Beloborodov S.M. Modorskiy V.YA.
Published: February 2025

The possibility of using of the developed algorithms of assembly of aircraft engine fans that maintain the specified balance of the structure even at ice covering is analyzed.

Keywords
aircraft engine fan, assembly, icing, imbalance, balancing
beloborodoff2011@yandex.ru, akf@pstu.ru
AVALIAÇÃO DO PERFIL EPIDEMIOLÓGICO DOS CASOS DE DENGUE NO NORDESTE DO BRASIL
Authors: Sousa Maria Vitalina Alves de , Cavalcante Antonia Abigail do Nascimento , Freitas Jacqueline Cristina Matos de , Nascimento Maria Danielle Alves do , Margarida Alves de Oliveira  , Santos Ana Flávia Silva dos , Ponte Lais Frota , Silva Filho Paulo Sérgio da Paz , Rocha Francisco Vinicius Teles , Sousa Francisco de Assis da Silva , Cardoso Arquimedes Cavalcante , Silva Avelar Alves da
Published: February 2025

Objetivo: Este estudo visa analisar o perfil epidemiológico da dengue no Nordeste do Brasil, com foco em variáveis como incidência, distribuição etária, sazonalidade, letalidade e fatores associados à disseminação da doença. O objetivo é fornecer uma visão atualizada da situação epidemiológica da dengue na região, contribuindo para o desenvolvimento de medidas de enfrentamento mais eficazes e baseadas em evidências científicas. Métodos: A pesquisa foi conduzida com uma abordagem quantitativa, retrospectiva e descritiva, utilizando dados secundários provenientes de sistemas de vigilância epidemiológica, como o Sistema de Informação de Agravos de Notificação (SINAN). Resultados e Discussão: A dengue continua sendo um problema significativo de saúde pública no Nordeste do Brasil, com surtos recorrentes e grande impacto nas comunidades locais. Em 2019, foram registrados 214.226 casos, com uma queda nos anos seguintes, possivelmente devido às medidas de distanciamento social para combater a pandemia de COVID-19. A partir de 2022, os casos aumentaram, refletindo a retomada da circulação do vírus e das condições que favorecem a propagação do mosquito Aedes aegypti. Em 2024, houve um aumento abrupto, sugerindo um possível cenário epidêmico. A Bahia lidera o número de casos, seguida por Pernambuco e Ceará, enquanto Sergipe apresenta os menores índices. A análise sociodemográfica revela maior prevalência de casos em mulheres e nas faixas etárias de 01-19 anos e 20-39 anos, sugerindo maior vulnerabilidade desses grupos. A baixa escolaridade e lacunas nos dados indicam vulnerabilidade social. A maioria dos casos é de dengue simples, com baixa taxa de mortalidade, mas as ações preventivas continuam essenciais. Conclusão: O aumento significativo dos casos nos últimos anos destaca a importância da vigilância epidemiológica contínua e da adoção de medidas preventivas eficazes. Além disso, os desafios relacionados à subnotificação e inconsistência dos dados reforçam a necessidade de aprimorar os sistemas de registro e notificação de casos, garantindo melhores estratégias de controle e mitigação da doença.
DIGITAL DIVIDE AMONG THE YOUTH IN INDIA: ISSUES AND CHALLENGES
Authors: Samujjal Ray
Published: February 2025

The digital divide is one of the major issues affecting various people worldwide. Despite the rise of Information and Communication Technologies (ICTs) in recent decades, the digital divide, which encompasses the disparity in access to the Internet and other digital devices, has been impacting various segments of society. In this aspect, youth worldwide are mostly affected. This article attempts to highlight the issue of the digital divide among the youth in India. First, this article examines the concept of the digital divide and youth. Second, it highlights the various issues and challenges that impact youth access to the Internet. Third, this article provides a concluding remark and suggests some policy measures.
KEYWORDS: Digital divide, youth, India, ICTs, caste, class, gender, rural-urban divide
Įrodymais grįstos intervencijos siekiant atsisakyti rūkymo
Authors: Baniulienė Lilija
Published: February 2025

Rūkymo metimas – itin svarbus visuomenės sveikatos tikslas, atsižvelgiant į didelę sergamumo ir mirtingumo riziką, susijusią su tabako gaminių vartojimu. Įvairios intervencijos, pradedant farmakoterapija, tokia kaip nikotino pakaitinė terapija (NPT), vareniklinas arba bupropionas, baigiant kognityvine elgesio terapija (KET), parodė nevienodą veiksmingumo lygį. Pastaruoju metu taip pat daug dėmesio skiriama žalos mažinimo strategijoms, įskaitant kaitinamojo tabako gaminių (KTG), nikotino maišelių ir elektroninių cigarečių naudojimą kaip alternatyvą įprastoms degiosioms cigaretėms. Straipsnyje apžvelgiami naujausi šių intervencijų tyrimai ir pateikiamos praktinės rekomendacijos šeimos gydytojams, slaugytojams ir gyvensenos medicinos specialistams, siekiant veiksmingiau konsultuoti rūkančius pacientus.
Synthesis, structure, ionochromic and cytotoxic properties of new 2-(indolin-2-yl)-1,3-tropolones
Authors: Sayapin Yurii A , Gusakov Eugeny A , Tupaeva Inna O , Dubonosov Alexander D , Dorogan Igor V , Tkachev Valery V , Goncharova Anna S , Shilov Gennady V , Kuznetsova Natalia S , Filippova Svetlana Y , Krasnikova Tatyana A , Boumber Yanis A , Maksimov Alexey Y , Aldoshin Sergey M , Minkin Vladimir I
Published: February 2025

The acid-catalyzed reaction of benzo[e(g)] derivatives of 2,3,3-trimethylindolenines with o-chloranil leads to new 2-(benzo[e(g)]indolin-2-yl)-5,6,7-trichloro-1,3-tropolones and 2-(benzo[e(g)]indolin-2-yl)-4,5,6,7-tetrachloro-1,3-tropolones. Based on the results of PBE0/6-311+G(d,p) calculations, the structural and energetic characteristics of the tautomeric forms of the obtained 1,3-tropolones were determined. The structure of 2-(3,3-dimethyl-3H-benzo[g]indolin-2-yl)-5,6,7-trichloro-1,3-tropolone was determined by X-ray diffraction analysis. The compounds obtained are capable of switching emission at 420–440 nm and 476–530 nm upon successive exposure to CN− and Hg2+ ions in an acetonitrile solution. 2-(1,1-Dimethyl-1H-benzo[e]indolin-2-yl)-5,6,7-trichloro-1,3-tropolone exhibited high in vitro cytotoxic activity against A431 skin cancer and H1299 lung cancer cell lines.
Analysis of Communication Patterns and Social Networks in Digital Propaganda Against Zionism in the Palestine-Israel Conflict
Authors: Nabila Fikriyah Saniyah , Pramiyanti Alila
Published: February 2025

The analysis of communication patterns and social networks in digital propaganda aims to understand the mechanisms of the spread and reception of these messages in various parts of the world. Research on digital propaganda on social media has identified a number of important patterns in the spread of messages. This research provides significant insights into the role of social media in shaping the dynamics of international conflict, as well as how digital propaganda can influence public perceptions of complex issues. Using the Social Network Analysis (SNA) method, this research enriches the theoretical understanding of how interactions between actors on platforms such as Twitter or X affect the spread of information and the formation of public opinion. This research also expands knowledge about SNA metrics such as degree centrality, which can be used to identify key actors in the spread of digital propaganda.
OBSTACLES AND CHALLENGES OF ISLAMIC BANKING INCLUSION IN BANKING DIGITALIZATION IN THE ERA OF FINANCIAL TECHNOLOGY (FINTECH)
Authors: Pajaria Yusiresita
Published: February 2025

This study aims to determine and examine what are the obstacles and challenges ofIslamic banking inclusion in banking digitalization in the era of financial technology(FINTECH). The research method used isdata collection method through library researchwithusing qualitative analysis, meaning describing the processed data in detail intosentences (descriptive). The qualitative analysis carried out starts from empirical analysis,which in its depth is supplemented with normative analysis.To analyze the data, the threedata analysis methods used are inductive, deductive, and comparative methods.The results of the study are that the development of Islamic banking has severalshortcomings such as: vision, capital, products, financing, human resources (HR), services,information, public understanding; The presence of FINTECH affects Islamic banking,namely by providing contributions such as: easy and cheap services as well as effective andefficient, helping Islamic banks in speed and accuracy in processing business operationsdata and product marketing, providingsignificant impact on several aspects of the economy,while simultaneously restructuring the face of the Islamic financial industry,rapiddevelopment FINTECH directly proportional to the challenges faced,drivers of achievingfinancial inclusion, the presence of a strong consumer protection system and a digitalecosystem, Islamic banking FINTECH is developing massively in Indonesia, there will beFINTECH and banks collaborating into one
Afrocentric Citizenship Education: A Resource for Good Governance and Economic Resuscitation in Post-Colonial Africa
Authors: Iwara Ishmael , Ojakorotu Victor
Published: February 2025

Institutional corruption and lack of accountability, both prevalent traits of ill governance, continue to undermine Africa’s economic development, persistently straining growth and stability despite numerous reform efforts aimed at promoting transparency, and integrity. Through a synthesis of contemporary discourse on anti-corruption measures and good governance, this desktop study conceptualised Africanized citizenship education, delivered through curriculum reforms, family influence, and societal platforms as a crucial intervention. The urgency of Afrocentric citizenship education lies in the need to restore Afrocentric governance principles from the pre-colonial era, which is premised on ethical leadership, oneness, communal values, dignity, and collective responsibility. While curriculum reforms foster compulsory undertakings of citizenship education, the involvement of parents or guidance in the pursuit is resourceful in bridging the gap between school-based learning and real-world application. Through societal platforms, awareness can be strengthened to build morally upright individuals who can comprehend, and fulfil their civic responsibilities, further guiding the younger generation in the same direction. Subsequent studies may triangulate the key findings with grassroots realities and conceptualise a more comprehensive framework towards Afrocentric citizenship education attainment.

Keywords: Afrocentrism, Citizenship Education, Civil Accountability, Corruption Misgovernance
The Effects of Stakeholder Collaboration on Academic Performance and Institutional Effectiveness: A Case Study of Three Secondary Schools in the OR Tambo Inland District in the Eastern Cape of South Africa
Authors: Maqhubela Vuyokazi
Published: February 2025

Stakeholder collaboration plays a pivotal role in enhancing academic performance and institutional effectiveness in secondary schools. This paper examines the effects of collaboration among key stakeholders, including faculty, administration, students, external industry partners, and community members, on both student outcomes and the overall effectiveness of secondary schools. This paper is underpinned by the Collaborative Governance Theory which posits that multi-stakeholder collaboration can effectively improve institutional outcomes by leveraging diverse perspectives, resources, and expertise. The theory emphasizes the importance of shared decision-making and collective action, which are crucial in navigating complex organizational environments like schools. A sample of one rural university was selected for this study, with a focus on the experiences, behaviours, and social interactions of 3 parents, 3 learners, 3 teachers, and 1 school principal in each school. Based on the study’s interpretive paradigm, it was discovered that schools with well-integrated collaborative frameworks are better positioned to foster student success, maintain competitive relevance, and ensure long-term institutional growth. The study recommended that schools formalize collaborative processes by creating clear frameworks that define the roles and responsibilities of all stakeholders, including faculty. It was further recommended that schools should actively seek partnerships with industry, alumni, and community organizations. This study contributes to the growing body of literature on collaborative governance and its implications for achieving academic excellence and sustainable institutional development in the higher.

Keywords: Education, Stakeholders, Collaboration, Institutional growth, Development.
Is the Methodist Church of Southern Africa an African Church or a Church in Africa? A Decoloniality Paradigm
Authors: Mokhutso Jacob
Published: February 2025

The study set out to explore whether the Methodist Church of Southern Africa (MCSA) is an African Church or a British Church operating in Africa. This is a fundamental question because it affects the MCSA’s mission, doctrines, and relevance to its black African membership. The question is critical, given the MCSA’s vision of “a Christ-healed Africa for the healing of nations.” The study first reconnoitered the milestones achieved by the MCSA to position itself as well as respond to Southern African challenges after its independence from the British Methodist church. Thereafter, available and relevant literature was reviewed to argue that, since the MCSA’s autonomy from the British Methodist Church in 1927, there has been an imbalance between the British Methodist heritage and the African-ness of the MCSA in its theology and its practices. This study argued that it compromises its witness and relevance to its black African membership. A decoloniality paradigm is explored in this regard. The study concluded with recommendations for further research and conversation on how the MCSA could be a more African Church. The study contributes to the ongoing conversations and scholarship in the MCSA on contextual theology, African theology, and decolonisation of its theology and doctrines.

Keywords: MCSA, African Church, Decoloniality
La educación como generadora de movilidad social: pobreza y desigualdad social en la narrativa de los escritores radicales costarricenses (1900–1935)
Authors: PANIAGUA RUTH CUBILLO
Published: February 2025

A finales de la década de 1920 e inicios de la década de 1930 estallaron en Costa Rica varios movimientos obreros debido a la grave crisis económica que experimentaba el país y que afectó más duramente a las clases sociales bajas. En este contexto, se consolida un nuevo núcleo generacional, los ‘intelectuales radicales’, cuyas producciones literarias evidencian la presencia de propuestas ideológicas tales como el socialismo, el acratismo y el anarquismo. En este artículo se analiza una selección de la narrativa publicada por tres intelectuales radicales costarricenses: Joaquín García Monge, Omar Dengo y Carmen Lyra, con el fin de profundizar en las representaciones de la pobreza como generadora de desigualdad social, en este particular contexto socio-económico.
Photometric Stellar Parameters for 195,478 Kepler Input Catalog Stars
Authors: Zhang Bowen , Huang Yang , Beers Timothy C. , Xiao Kai , Liu Jifeng , Jia Lei , Han Henggeng , Li Zhirui , Zheng Chuanjie , Sun Yongkang , Shi Ruifeng , Gu Hongrui
Published: February 2025

The stellar atmospheric parameters and physical properties of stars in the Kepler Input Catalog (KIC) are of great significance for the study of exoplanets, stellar activity, and asteroseismology. However, despite extensive effort over the past decades, accurate spectroscopic estimates of these parameters are available for only about half of the stars in the full KIC. In our work, by training relationships between photometric colors and spectroscopic stellar parameters from Gaia DR3, the Kepler-INT Survey, Large Sky Area Multi-Object Fiber Spectroscopic Telescope DR10, and Galactic Evolution Experiment at Apache Point Observatory DR17, we have obtained atmospheric parameter estimates for over 195,000 stars, accounting for 97% of the total sample of KIC stars. We obtain 1σ uncertainties of 0.1 dex on metallicity [Fe/H], 100 K on effective temperature T
eff, and 0.2 dex on surface gravity log g. In addition, based on these atmospheric parameters, we estimated the ages, masses, radii, and surface gravities of these stars using the commonly adopted isochrone-fitting approach. External comparisons indicate that the resulting precision for turnoff stars is 20% in age; for dwarf stars, it is 0.07 M
⊙ in mass, 0.05 R
⊙ in radius, and 0.12 dex in surface gravity; and for giant stars, it is 0.14 M
⊙ in mass, 0.73 R
⊙ in radius, and 0.11 dex in surface gravity.
GECAM Observations of the Galactic Magnetar SGR J1935+2154 during the 2021 and 2022 Burst Active Episodes. I. Burst Catalog
Authors: Xie Sheng-Lun , Cai Ce , Yu Yun-Wei , Xiong Shao-Lin , Lin Lin , Zhao Yi , Zhang Shuang-Nan , Song Li-Ming , Wang Ping , Li Xiao-Bo , Xue Wang-Chen , Zhang Peng , Zheng Chao , Zhang Yan-Qiu , Liu Jia-Cong , Wang Chen-Wei , Tan Wen-Jun , Wang Yue , Yu Zheng-Hang , Feng Pei-Yi , Zhang Jin-Peng , Xiao Shuo , Zhao Hai-Sheng , Zhang Wen-Long , Zhang Yan-Ting , Huang Yue , Zhao Xiao-Yun , Ma Xiang , Zheng Shi-Jie , Li Xin-Qiao , Wen Xiang-Yang , Gong Ke , An Zheng-Hua , Zhang Da-Li , Yang Sheng , Liu Xiao-Jing , Zhang Fan
Published: February 2025

Magnetars are neutron stars with ultrahigh magnetic fields (~1014–1015 G). The magnetar SGR J1935+2154 is not only one of the most active magnetars detected so far, but also the unique confirmed source of fast radio bursts. The Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is dedicated to monitor gamma-ray transients all over the sky, including magnetar short bursts. Here we report the GECAM observations of the burst activity of SGR J1935+2154 from 2021 January to 2022 December, which results in a unique and valuable data set for this important magnetar. With a targeted search of GECAM data, 159 bursts from SGR J1935+2154 are detected by GECAM-B while 97 bursts are detected by GECAM-C, including the X-ray burst associated with a bright radio burst. We find that both the burst duration and the waiting time between two successive bursts follow lognormal distributions. The period of burst activity is 134 ± 20 days, thus the burst activity could be generally divided into four active episodes over these two years. Interestingly, the hardness ratio of X-ray bursts tends to be softer during these two years, especially during the active episode with radio bursts detected.
Fungal fairy rings: history, ecology, dynamics and engineering functions
Authors: Zotti Maurizio , Bonanomi Giuliano , Mazzoleni Stefano
Published: February 2025

Fungal fairy rings (FFR) are fascinating natural phenomena that have intrigued people and scientists for centuries. These patterns, often represented by circular distributions of altered vegetation, are found in grasslands and forest habitats. Fairy rings occur when fungi grow radially in the soil, raising from a central point, progressively degrading organic matter and thus affecting vegetation. The observation of such spatial patterns allows mycologists to conduct an in-depth analysis of the role of fungi in ecosystems.

This review presents the current knowledge and scientific advancement of the studies of FFRs. An historical appraisal from the most representative pioneer studies until recent works is presented in different scientific fields, including microbiology, chemistry, botany and ecology. Based on a deep analysis of bibliographic data, we synopsised different aspects of FFRs: i) history of studies, ii) taxonomy, iii) ecology (environmental conditions and biogeography), iv) classification of vegetation patterns, v) spatial dynamics, vi) role as ecosystem engineer (impact on soil chemistry, plants and microbiota).

In conclusion, beside still open research areas requiring further investigation, a schematic functional model of fungal fairy rings is proposed, in which on one hand the dynamics of the fungal mycelium is explained by self-DNA accumulation and the build-up of autotoxicity. On the other hand, the effects of fungi on plants are related to the intermingled and differently spatially distributed effects of hydrophobicity, phytotoxicity and phytostimulation.
Isolation and characterization of edible mushroom-forming fungi from Swedish nature
Authors: Walthert Mario , Hiltunen Thorén Markus , Johannesson Hanna
Published: February 2025

Fungi
are a highly diverse group of organisms, of which only a small subset has been taken into cultivation for application in biotechnology and food industry. Accordingly, outside of a few model species, there is a lack of knowledge about the isolation and cultivation of fungi. In this study, we isolated 17 wild strains of 14 different species of edible, mushroom-forming fungi growing in Swedish nature. We documented their growth rates under different temperatures, investigated their fruiting characteristics, and compared the results to data obtained from common laboratory strains. Our results show that the strains from commercially cultivated species have a higher mycelial growth rate and tend to grow faster at higher temperatures than strains from less frequently cultivated species. The fruiting experiments led to successful fruiting of four newly collected wild strains, belonging to the species Hericium coralloides, Pleurotus pulmonarius, and Schizophyllum commune. Although some strains fruited on potato dextrose agar (PDA), more specific substrates such as straw or birch pellets indicated more potential for mushroom production. All newly isolated strains of this study have been deposited at the Westerdijk Fungal Biodiversity Institute (CBS) collection and are thereby made available for further studies and/or use in application in the food industry or biotechnology. Two species isolated in this study are entirely novel to widely used culture collections, and for nine species no Swedish strain has been deposited previously. The description of the mycelial growth and fruiting of the isolated strains in this study is a first step on their way to further use.
Bilateral Giant Choroidal Cavern in a Case of Rod-Cone Dystrophy: A Rare Presentation
Authors: Shah Rajul , Ajmani Udit , Nayak Sameera , Sahoo Niroj Kumar , Rao P. Srinivas , Takkar Brijesh
Published: February 2025

This report presents a case of a 22-year-old woman with bilateral giant choroidal caverns (CCs) in rod-cone dystrophy. Her best-corrected visual acuity was 20/80 in the right eye and 20/50 in the left eye. Fundus examination showed optic nerve pallor, narrowed blood vessels, and diffuse pigmentary changes. Fundus autofluorescence showed a central area of reduced autofluorescence surrounded by stippled autofluorescence. An electroretinogram showed decreased amplitude of both scotopic and photopic waves, consistent with a diagnosis of rod-cone dystrophy (retinitis pigmentosa). Optical coherence tomography revealed large CC and foveal atrophy in each eye. A giant CC alongside rod-cone dystrophy is a distinctive feature.

[
Ophthalmic Surg Lasers Imaging Retina
2025;56:XX–XX.]
Demonstration of Integrated Solenoid Transformer Balun in Glass Substrate Utilizing TGVs
Authors: Yu Jein , Han Insup , Yook Jongmin
Published: February 2025

This paper presents the implementation of a solenoid transformer balun within a glass substrate using through-glass vias (TGVs). We designed a Marchand type balun, based on a 3D solenoid transformer and integrated into a glass substrate, using TGVs realized through the laser induced deep etching process. The fabricated balun features a compact footprint of 1.18 × 0.61 × 0.46 mm3, good magnitude and phase balance performance, and a wide frequency bandwidth. The measured results align well with the simulations, showing a fractional bandwidth of over 50%, a common mode rejection ratio (CMRR) above 23dB, and a low insertion loss of less than 1.15dB, reaching a minimum of 0.45dB.
Synthesis of Highly Stable Near-Infrared FAPbI3 Perovskite doped with 5-AVA and its Applications in NIR Light-Emitting Diodes for Bioimaging
Authors: Din Nasrud , Saeed Fawad , Hussain Sajid , Sultan Dawood , Sellan Premkumar , Onwudiwe Damian Chinedu , Talaighil Razika Zair , Khan Qasim , Ashraf M. Zaman , Lei Wei
Published: February 2025

The continuously increasing external quantum efficiencies of Perovskite light-emitting diodes (LEDs) have received significant interest in the scientific community. The need for monitoring and medical diagnostics has experienced a steady growth in recent years, primarily caused by older people and an increasing number of heart attacks, tumors, and cancer disorders among patients. The application of Perovskite near-infrared light-emitting diode (PeNIRLEDs) has exhibited considerable efficacy in bioimaging, particularly in the visualization and examination of blood arteries, blood clots, and tumors. PeNIRLEDs exhibit exciting potential in the field of blood vessel imaging because of their advantageous attributes, including improved depth penetration and less scattering in comparison to visible light.

In this study we synthesized of FAPbI3 Perovskite doped with different concentrations of 5-Aminovaleric acid (5-AVA) 1-6 mg. The incorporation of 5-AVA as a dopant during the FAPbI3 Perovskite formation, it influences the FAPbI3 Perovskite’s structural and optical properties. While improve the FAPbI3 Perovskite’s stability, photoluminescence efficiency, and charge transport characteristics. We found resulting PL emission peak wavelength of 850 nm and bandwidth of 44 nm along with a calculated quantum yield of 75%.The incorporation of 5-AVA-modified FAPbI3 Perovskite into LEDs will show promising results, enhancing device efficiency, color purity, and stability. Making it suitable for various medical applications, including subcutaneous deep vein imaging, blood flow visualization, and tumor illumination.
Liquid Metal Jetting for High-Performance Computing Applications
Authors: Agarwal Sunny , Lazić Miloš
Published: February 2025

Gallium-based liquid metals (LMs) are materials that possess some unique properties. Just like any other metals, they have high thermal conductivity and low interfacial resistance, but they are in a liquid phase at room temperature. In contrast to mercury alloys, gallium alloys are non-toxic. They don’t evaporate, and they can’t be inhaled. The viscosity of those alloys is very similar to water, but they are six times as dense as water. All those properties make gallium-based liquid metals very good candidates for thermal interface material (TIM) in electronics applications. On the other hand, the reaction and incompatibility of those alloys with some metals is one of the challenges for this type of TIM. The other challenge is that those materials are not just thermally, but also electrically conductive, and that is not a desirable property for TIM. A suitable barrier that will prevent any leakage of LMs and the best way to apply the appropriate volume of LM in high-volume production (HVP) would be one of the most important things for any application.

A key challenge is applying the liquid metal consistently through a traditional dispensing method due to its property and behavior which involves high surface tension. Through advanced dispensing techniques like jetting technology, liquid metal can be applied reliably on a flat, uneven surface or in arrays of minuscule confined spaces or cavities. This paper highlights the dispense quality, weight repeatability from one substrate to another, and valve hardware stability. This paper also addresses the challenges faced during dispensing of liquid metal in high volume manufacturing, and how to achieve desired bondline thickness with jet dispensing for higher throughput and process reliability.
Multi NoC Performance Driven Exploration on FPGA SoC for Industrial Applications
Authors: Sharma Daksha , Majumder Pritam , Galeev Mikhail , Agarwal Johanan
Published: February 2025

Field Programmable Gate Arrays (FPGAs) are pervasive everywhere, even more so in industrial and embedded domains. It provides support for diverse workloads with stringent latency requirements. In order to provide flexibility of programmable logic with power, performance and cost savings of hard IP, a Hard Processor System (HPS) along with FPGA fabric delivers reduced board space, system power and total cost of ownership savings by eliminating the requirement of a discrete embedded processor. This paper covers system level performance modeling of an HPS platform with multiple NoCs (Network-on-chip) , peripherals and memory hierarchy using Synopsys Platform Architect tool. As a case study, performance of Time Sensitive Networking (TSN) endpoints along with USB endpoints is thoroughly evaluated using concurrent traffic analysis. Our performance optimization results show 55% average latency reduction compared to baseline architecture. Early design space exploration allowed architectural optimizations impacting NoC silicon changes and sign off ≈ 8 months ahead of RTL (Register transfer level) define here verification start.
Electrolytic Deflash & High-pressure Water Jet Simulation Driven Delamination Risk Assessment in Plastic Packages
Authors: Kishore Sharan , Chen Yaxiong , Hauck Torsten , Dougherty David
Published: February 2025

Plastic molded lead frame products are widely used in the semiconductor industry. The Epoxy Mold Compound (EMC) selected for these products is designed to have excellent adhesion and integrity to the die and other materials in contact. In manufacturing, mold flash is often unavoidable, and cleaning is required to enhance mechanical and thermal functionality as well as cosmetic appearance. Deflash, the commonly used cleaning method, is typically integrated into post-plating operations that may also finish the package with Sn and other lead-free plating. Deflash typically consists of passing the molded package through an alkaline bath (such as KOH) that softens and degrades the adhesion of the EMC flash. This process can be energized using Electrolytic Deflash (ED) i.e., by applying DC current between the product and the alkaline bath. ED cleaning effectiveness increases with higher current density. Next, High-Pressure Water Jet (HPWJ) removes the loosened flash in line with the deflash process. An issue/risk is that ED and HPWJ processes can induce unwanted interface delamination between the leads and the EMC at the boundary of the package. In this paper, we propose a computational framework to study the mechanism of delamination during flashing process. During the two-step analysis, electrostatics and mechanical simulations are performed to assess the impact of ED and HPWJ processes and identify regions of the package that are susceptibility for delamination. Current density was predicted to vary widely across the lead frame in-plane features and with bath concentration. Regions of the lead frame at the package’s boundary with high current density were identified as a risk for delamination. The electrolytic reaction results in crack initiation at these regions and furthermore the crack propagates under HPWJ. This is understood from HPWJ simulation where the high stress region coincides with high current density region in the ED simulation. Overall, the experimental observed delamination regions agreed with the deflash simulation predicted delam risk locations. This developed computational framework thus enables pathways to improve the strip designs and deflash process control maintenance.
Effects of Constraints on Solder Joint Reliability of Electronic Packages
Authors: Purushotaman Arvind , Raines Natalie , Angas Masoud , Manzanares Robert , Blattau Nathan
Published: February 2025

IC package modelling and simulation has been cornerstones in electronic package reliability for more than three decades. Although there is rich literature available on various modelling approaches and experimental data on package failure during thermal cycling tests, the understanding of system level effects such as bolt location on solder joint reliability is limited. For this analysis, thermal cycle tests on 256 pin 17mm × 17mm BGA and 2512 chip resistor were conducted at (1) -40oC to +125oC, and (2) +25oC to +125oC. Test results were compared with Finite Element Analysis (FEA) results. A total of ten samples of each package type were mounted onto a 1.6 mm thick printed circuit board (PCB) coupon. Four coupons were evaluated per condition with SAC305 solder. To understand the effects of constraints, the test coupons were bolted to an aluminum fixture. Three structural conditions were considered for the test, namely, (1) Free Warp, (2) Semi-Constrained, & (3) Fully Constrained. Moreover, four packages of each type were mirrored to better understand the solder joint reliability due to mirroring packages. All the packages were daisy chained and electrical resistance of the packages were monitored. A tenfold increase in resistance for five consecutive cycles was considered a complete failure. The cycles to failure were analyzed using a 2-parameter Weibull distribution for characteristic life.
LidroCUT – Ultrashort-pulsed Laser Processing in Liquids for Clean Dicing in One Process Step
Authors: Wessels Jan-Philipp , Laake Katharina , Hoppius Jan Stefan , Kanitz Alexander
Published: February 2025

Ultrashort-pulsed laser dicing in liquids, a combination of laser cutting and flowing liquids is a new technology for wafer dicing. This technology can cut any material at very high quality with virtually zero yield loss. This makes it possible to cut even complex material stacks with a single machine in one process. In detail, an ultra-short pulsed laser effectively cuts the material, while the liquid prevents heating of the substrate and adjacent structures, in addition to effectively flushing debris away from the kerf, keeping the sidewall and device clean. In this paper, the features of cleanliness, sidewall quality and thermal impact for silicon, copper on silicon and mold compound are presented.
Investigation for the Influences of Factors Within the Semi-Additive Process (SAP) on Nanovoid Formation in the Cu-Cu Interface by STEM Analysis
Authors: Matsumoto Kanji , Yamamoto Hisamitsu
Published: February 2025

Electroless copper deposition is widely used in the electronics industry. In recent years, electronic components tend to be densified as the performance of electronic devices increases. The densification of electronics components means the decreasing of conductor width and spaces formed as the circuit patterns and reducing the diameter of Blind Via Holes used as an interconnect between the circuit layers within the electronic substrates.

If voids exist in reduced diameter BVHs, the reliability of electronics components could decrease. Thus, voids formed in the electrolytic Cu / electroless Cu interface and electroless Cu / inner layer Cu interface and the cause of the formation of voids have been the focus of attention in recent years.

Although there are some studies regarding voids formation in the interfaces of electrolytic Cu / electro-less Cu / inner layer Cu for such this reason, factors relating to the formation of nanovoids in the interfaces are not clearly mentioned.

Therefore, the purpose of this paper is investigation for various factors that could cause void formation in the interface. Experiments performed on actual substrates consisting of copper foil, electroless copper layer, electrolytic copper layer and glass epoxy resin are very practical and easy to understand. On the other hand, it will be hard to find out the root cause of void formation owing to too complicated processes for production of these substrates.

We adopted a special method of experiment to prepare samples in order to investigate the effect of just one factor from many factors. This method will be included in the process for preparing actual substrates for the formation of voids. STEM-EDX was used to confirm whether voids exist in the interface or not and the area of electroless copper layer is identified from EDX Ni-mapping results. AES also was used for analysis on surface of inner layer copper. The TEM lamellae were prepared with FIB.

The results obtained from these experiments clarify that the formation of voids was related to the presence of copper oxide on the inner layer copper.