bluuebunny/crossref_metadata_2025 huggingface dataset:
Transformación Educativa: Explorando Las Tic Y El Metaverso En La Enseñanza De La Educación Superior
Authors: Ruiz Muñoz Geovanny Francisco , Paz Zamora Yomira Elizabeth , Ortiz Chimbo Karla Maribel , Vasco Delgado Juan Carlos
Published: February 2024

El libro «Transformación Educativa: Explorando las TIC y el Metaverso en la Enseñanza de la Educación Superior» aborda la encrucijada actual de la educación superior en la era digital, donde las Tecnologías de la Información y Comunicación (TIC) y el metaverso han redefinido el paisaje educativo. Explora los fundamentos pedagógicos de las TIC, resaltando el surgimiento del aprendizaje conectado y la colaboración global. A medida que se sumerge en el metaverso, examina cómo la inmersión en entornos virtuales mejora la comprensión y la colaboración entre estudiantes. La inteligencia artificial (IA) emerge como catalizador en la transformación educativa, destacando su capacidad para personalizar la experiencia de aprendizaje. Sin embargo, se enfoca en los desafíos éticos relacionados con la implementación de la IA, desde la transparencia de los algoritmos hasta la mitigación de sesgos. El libro también destaca la importancia de la evaluación y certificación de habilidades adquiridas en entornos digitales, proponiendo la necesidad de repensar métodos de evaluación y establecer estándares innovadores. Concluye subrayando la importancia de la formación continua de educadores y la colaboración interdisciplinaria. A lo largo de sus páginas, ofrece una visión integral de la transformación educativa en la educación superior, desde los fundamentos pedagógicos hasta la visión del futuro, proporcionando una guía valiosa para educadores, administradores y profesionales en su viaje hacia la redefinición de la educación superior en la era digital.
LIQUID SOAP FORMULATION FROM ETHANOLIC EXTRACT OF CASSAVA LEAVES (Manihot esculenta Crantz) WITH COCAMIDE DEA AS SURFACTANT
Authors: Martihandini Nooryza , Putria Angelica Diani , Isasi Sutiswa Shandra
Published: February 2024

The ethanol extract of cassava leaves contains various secondary metabolites that have antibacterial activity against Escherichia coli, Staphylococcus aureus, and Shigella sp., and thus can be used as active ingredients in liquid soap preparation. Liquid soap formulations generally use sodium lauryl sulfate (SLS) as a surfactant, which can cause irritation and skin dryness. This study aimed to formulate an ethanol extract from cassava leaves into a liquid soap preparation using cocamide DEA as a surfactant to reduce skin irritation. The study was conducted in an experimental laboratory. Cassava leaves were extracted by maceration using ethanol. Three liquid soap formulas from cassava leaf extract were developed with different extract concentrations: F1 (1%), F2 (3%), and F3 (5%). The liquid soaps were evaluated in terms of organoleptic properties, pH, homogeneity, viscosity, foam height, and foam stability. The study showed that cassava leaves extract could be formulated into a homogeneous liquid soap with a pH range of 7.0–7.5, viscosity of 143.6–306.2 cps, foam height of 53.33–60.00 mm, and foam stability of 75.01–82.36%. F3 is the optimum formula with the best physical characteristics of the preparation in terms of organoleptic properties, foam height, and foam stability.
Keywords: cocamide DEA, cassava leaves, liquid soap, surfactant
QRS Detection Based on Discrete Wavelet Transform for ECG Signal with Motion Artifacts
Authors: Ziti Fariha Mohd Apandi  , Ryojun Ikeura  , Soichiro Hayakawa  , Shigeyoshi Tsutsumi
Published: February 2024

Motion artifacts in ECG signals recorded during physical exercises activities can affect the diagnosis of arrhythmia. To minimize the faults in arrhythmia detection, it was important to choose accurate algorithm for detecting QRS in ECG signal with noises produced during physical movements of the patients. Therefore, choosing the QRS detection algorithm with good competency for the signal affected by noises and motion artifacts is needed for arrhythmia detection analysis. The QRS detection based on Discrete Wavelet Transform was implemented and presented in this paper. The performance of the algorithm was assessed using the MIT-BIH Arrhythmia Database and MIT-BIH Noise Stress Database. For the MIT-BIH Arrhythmia database, the average Sensitivity (Se) and positive Predictivity (+P) of the algorithm were 98.24% and 98.61%, respectively. The algorithms had a lower average false negative rate (FNR) than the pan Tompkins algorithm when applied to the MIT-BIH noise stress test database, which was 0.033% for record 118 and 0.032% for record 119, respectively. The results demonstrated that the algorithms perform well when dealing with arrhythmia data and motion artifact at various levels of signal to noise ratio.
Assessing Malaysia’s Internet of Things (IoT) Readiness Based On CREATE-IoT Key Performance Indicators
Authors: Okta Nurika  , Low Tang Jung
Published: February 2024

The current nationwide deployment of Internet of Things (IoT) in Malaysia has never been assessed nor benchmarked against any Key Performance Indicators (KPIs). A proven IoT assessment standard called CREATE-IoT has successfully driven IoT projects in European countries, and it is hence used as a benchmarking tool in this research. The assessment that includes both technical and business perspectives concludes that 42 out of 50 KPIs (84%) in Malaysia are in the advanced state. Malaysia is thus rated as an IoT-ready country. However, rooms for improvement exist in the scopes of providing expected duration for completing an IoT service transaction to predict the level of customer satisfaction when using the service – and the ability to produce IoT sensors and devices locally to have sustainable, scalable, and economical continuous IoT deployments.
UPAYA PENINGKATAN HASIL BELAJAR KIMIA SISWA MELALUI MODEL DISCOVERY LEARNING PADA BAHAN TITRASI ASAM BASA
Authors: Ningsih Diyani Wahyu , Muchlis
Published: February 2024

This study aims to determine the improvement of learning outcomes by applying the Discovery Learning (DL) model on acid-base titration material. This research was conducted on phase F students, especially in class XI chemistry 2 totaling 35 students. This research method is Classroom Action Research consisting of 2 cycles of each cycle 1 meeting. The results obtained in this study are the learning outcomes of students. In cycle I, the number of students who have reached the minimum completeness criteria is 15 students (42.8%). In cycle II, the number of students who had reached the minimum completeness criteria was 29 students (82.8%). There was an increase in the percentage of completeness from cycle I to cycle II by 40.0%.
UPAYA MENINGKATKAN KEMAMPUAN LITERASI DAN NUMERASI DENGAN MENGGUNAKAN METODE AKM PADA SISWA KELAS V SDN RADHA
Authors: Kedhi Katharina , Bhoke Wilibaldus
Published: February 2024

Penelitian ini bertujuan untuk mengetahui peningkatkan kemampuan literasi dan numerasi siswa kelas V SDN Radha melalui program kerja kampus mengajar angkatan 5 dengan menggunakan metode AKM. Jenis penelitian yang digunakan adalah penelitian deskriptif kualitatif dengan waktu penelitian selama 4 bulan. Lokasi penelitian ini dilakukan di UPTD SDN Radha, Kecamatan Bajawa, Kabupaten Ngada, Nusa Tenggara Timur. Adapun teknik dan instrument yang digunakan sebagai pengumpulan data dalam penelitian yaitu teknik wawancara, observasi, tes dan dokumentasi. Untuk mengetahui tingkat kemampuan literasi dan numerasi siswa SDN Radha, peneliti menggunakan metode tes AKM yang dilakukan pada awal penelitian (pretes AKM) dan pada akhir penelitian (postes AKM) yang dilakukan pada siswa kelas V dengan jumlah 16 orang. Kemampuan literasi awal yang dimiliki siswa kelas V yaitu berada pada rata-rata 53,4375% dan hasil rata-rata pre test numerasi adalah 42,1875%. Dari hasil pre test AKM ini terbukti bahwa kemampuan literasi dan numerasi yang dimiliki siswa kelas V SDN Radha sangat rendah. Oleh karena itu, peneliti melakukan beberapa upaya peningkatan kemampuan literasi dan numerasi pada siswa melalui beberapa program kerja kampus mengajar.
PENGGUNAAN MEDIA PAPAN PINTAR BERHITUNG UNTUK MENINGKATKAN PEMAHAMAN NUMERASI BAGI SISWA KELAS 1 DI SDK OLABOLO
Authors: Tawa Maria Emirentiana , Meo Maria Dionesia , Senda Maria Familiana , Sayangan Yohanes Vianey , Lobo Leonardus
Published: February 2024

Abstrak            

Penelitian ini bertujuan untuk meningkatkan kemampuan numerasi dalam pembelajaran matematika dengan menggunakan Papan Pintar Berhitung. Jenis penelitian ini adalah Penelitian Tindakan Kelas (PTK). Penelitian ini terdiri dari 2 siklus. Subjek penelitian ini adalah siswa kelas 1 SDK Olabolo yang berjumlah 13 orang terdiri dari 7 siswa laki-laki dan 6 orang siswa perampuan. Metode pengumpulan data menggunakan tes. Data yang dikumpulkan dalam penelitian ini berupa data kuantitatif yaitu data pokok dalam penelitain yang berupa data penialaian penting tes kemampuan numerasi. Hasil penelitian penggunaan media papan pintar berhitung pada pembelajaran matematika dengan materi penjumlahan dan pengurangan 1-20 dinyatakan meningkat setelah menggunakan media papan pintar dari pra siklus ke siklus 1 sebesar 11,53% dan memperoleh skor rata-rata pra siklus sebesar 54,23 ke siklus satu rata-rata sebesar 65,76 atau berada pada kategori cukup. Dari siklus 1 ke siklus 2 mengalami peningkatan sebesar sebesar 18,47% dan memperoleh skor rata-rata 84,23 atau berada pada kategori sangat baik.  Sedangkan secara klasikal terjadi peningkatan yang sangat signifikan yaitu mencapai 100% dari penetapan KKM 75%. Hal ini mengindikasikan bahwa penggunaan media papan pintar berhitung sangat efektif dalam meningkatkan kemampuan numerasi pada siswa kelas 1 di SDK Olabolo
PENGUATAN LITERASI BACA-TULIS SISWA FASE A MELALUI KEGIATAN LESSON STUDY DALAM IMPLEMENTASI PROGRAM KDS DI UPTD SDN SOBO
Authors: Watu Arnoldus Yansen , Nari Sae Floranida , Wae Emiliana , Wea Heribertus Agapitus , Uge Lawe Yosefina
Published: February 2024

Berdasarkan analisis awal yang dilakukan di UPTD SDN Sobo diperoleh data bahwa aspek literasi baca-tulis siswa fase A SDN Sobo masih rendah. Merujuk pada hal tersebut penulis terlibat dalam kemitraan Dosen LPTK dengan guru di sekolah (KDS 2023) melakukan penguatan  literasi dasar baca-tulis siswa melalui kegiatan Lesson Study. Literasi baca-tulis adalah peserta didik mampu membaca dan menulis terlebih khusus pada siswa kelas rendah. Kegiatan  Lesson Study berproses melalui tiga tahapan yaitu Plan (merencanakan), Do (melaksanakan), dan See (merefleksi) dan Re-Design Pembelajaran. Tujuan dari penelitian ini adalah penguatan literasi baca-tulis terdiri dari: penguatan pengenalan huruf, penguatan lambang huruf dan bunyi huruf, penguatan suku kata, penguatan membaca kata, penguatan membaca pemahaman, kelancaran membaca dan menulis fokus kajian adalah penguatan aspek literasi dengan target sasaran adalah siswa kelas 1 yang berjumlah 14 orang dan siswa kelas 2 yang berjumlah 23 siswa. Metode penelitian ini menggunakan deskriptif kualitatif dengan instrumen yang digunakan adalah observasi, wawancara, dokumentasi. Hasil penelitian penguatan literasi baca-tulis siswa UPTD SDN Sobo  melalui kegiatan lesson study untuk siswa kelas 1 pada aspek mengenal huruf  meningkat sebesar 69%, aspek menulis huruf  meningkat sebesar 23%, membaca suku kata 30%, membaca kata 15%, membaca pemahaman 7,6%, dan menulis kalimat 23%. Data penguatan literasi baca-tulis siswa kelas 2 pada aspek mengenal huruf 13,6%, menulis huruf 18,1%, membaca suku kata 4,5%, membaca kata 40,9%, membaca pemahaman 36,3%, dan menulis kalimat 27,2%. Berdasarkan data penelitian di atas dapat disimpulkan bahwa penguatan literasi baca-tulis siswa fase A UPTD SDN Sobo melalui kegiatan Lesson Study implementasi program KDS dapat meningkatkan kemampuan literasi pasa siswa fase A UPTD SDN Sobo.
PELAKSANAAN PLP II SEBAGAI UPAYA MENINGKATKAN LITERASI, NUMERASI DALAM PEMBELAJARAN IPA MENYENANGKAN DI SDI RAWE
Authors: Meme Yosefina Owa , Kua Maria Yuliana
Published: February 2024

Abstrak

Kemampuan literasi numerasi peserta didik mengalami penurunan yang signifikan yang terjadi di jenjang sekolah dasar, dimana peserta didik kelas rendah ada yang belum mengenal huruf dan angka serta pesrta didik kelas tinggi yang masih membaca suku kata dan juga belum sepenuhnya menguasai operasi hitung. Pelaksanaan Pengenalan lapangan persekolahan (PLP II) sebagai upaya meningkatkan kemampuan literasi, numerasi siswa. literasi dan numerasi siswa masih rendah sehingga kemendikbudristek menetapkan adanya program merdeka belajar kampus merdeka untuk meningkatkan mutu pendidikan di Indonesia. pembalajaran IPA di sekolah dasar juga kurang diminati siswa karena siswa merasa bahwa pembelajaran IPA kurang menyenangkan. jenis penelitian menggunakan pendekatan kualitatif deskriptif. penelitian ini  dilaksanakan selama empat bulan, lokasi penelitian dilaksanakan di SDI Rawe, kecamatan Boawae, Kabupaten Nagekeo.prosedur pengumpulan data mengguanakan observasi,wawancara,dan tes. sehingga dapat disimpulkan bahwa pelaksanaan PLP II sebagai upaya meningkatakan literasi numerasi  siswa dalam pembelajaran menyenangkan dilaksanakan dengan baik dan dapat dilihat melalui hasil pelaksanaan AKM dan peserta didik giat melaksanakan kegiatan literasi sebelum pembelajaran dimulai,numerasi dengan menghafal perkalian 1-10 dengan baik.
A Necessidade de investimentos para a universalização do saneamento no Brasil : uma proposta de abordagem conforme a situação contratual dos grupos de municípios
Authors: Pompermayer Fabiano Mezadre , Silveira Sobrinho Edson
Published: February 2024

O artigo discute a necessidade de investimentos para a universalização do saneamento no Brasil, abordando a exigência de comprovação de capacidade econômico-financeira para contratos em vigor e a análise dos municípios em grupos conforme a situação contratual. Também apresenta estatísticas descritivas de quatro grupos de municípios e uma base de dados ampla, além de explorar o desafio dos investimentos para atingir as metas de universalização dos serviços em todo o território nacional até 2033.
Diálogo e racionalidade: desafios da produção normativa no setor de saneamento
Authors: Sabença Sandro , Marçal Thaís
Published: February 2024

O artigo aborda que para viabilizar a universalização do saneamento, é necessário aportar um grande volume de investimentos. Diversos entes federados concluíram que não seriam capazes de universalizar o saneamento sem o investimento do setor privado, optando-se por modelagens de concessão ou PPPs. O setor de saneamento é peculiar e possui uma arquitetura institucional complexa e multifacetada, com vários atores públicos envolvidos. É fundamental que haja uma governança regulatória pautada em um ambiente dialógico e em um processo normativo/decisório baseado na racionalidade, proporcionando segurança jurídica.
Projeto de pesquisa monitor do saneamento do Ipea
Authors: Santos Gesmar Rosa dos
Published: February 2024

Trata do projeto de pesquisa Monitor do Saneamento do Ipea, que tem como objetivo realizar estudos sobre o saneamento básico no Brasil, a partir da análise da trajetória do setor e de suas políticas setoriais, sistemas de planejamento, regulação, financiamento e gestão integrada com outras políticas. Para tanto, organiza e difunde indicadores setoriais sobre o tema, acompanha as mudanças na legislação e nos instrumentos de gestão, tendo em vista o atendimento da população. Os trabalhos procuram englobar os quatro componentes do saneamento básico, conforme a definição da legislação brasileira: i) abastecimento de água; ii) esgotamento sanitário; iii) drenagem e manejo de águas pluviais; e iv) serviços de resíduos sólidos.
A Trajetória do Índice de Vulnerabilidade Social: histórico e perspectivas
Authors: Costa Marco Aurélio
Published: February 2024

O ensaio relata a trajetória do projeto Mapeamento da Vulnerabilidade Social nas Regiões Brasileiras, estruturado no âmbito da Plataforma Ipea de Pesquisa em Rede (Rede Ipea), por meio do qual foi desenvolvido o Índice de Vulnerabilidade Social (IVS) e a plataforma do Atlas da Vulnerabilidade Social (AVS). Os índices sintéticos – como é o caso do IVS – podem ser um recurso útil de apoio ao desenho, ao monitoramento e à avaliação das políticas públicas; permitem um olhar objetivo sobre a realidade; e apoiam a tomada de decisões associadas às políticas públicas. Ademais, favorecem uma comunicação rápida e mobilizadora da opinião pública e são uma régua que permite comparações espaçotemporais. O artigo discute o índice e visita o percurso de construção do IVS, de suas dimensões e indicadores, e das diferentes versões da plataforma do AVS, publicada originalmente em 2013. A plataforma traz um conjunto extenso de dados (indicadores, subíndices e índices) disponíveis para consulta e download, com variadas possibilidades de cruzamento, usos e aplicações. O artigo explora os avanços e os usos do IVS para a construção de políticas públicas, como o caso do programa Mais Médicos e, ao final, apresenta os desafios do processo permanente de atualização do AVS, em especial a partir da publicação dos resultados da pesquisa amostral do Censo Demográfico 2022.
O Ipea sobe o morro: avaliação de projetos e programas de urbanização de assentamentos precários
Authors: Balbim Renato Nunes , Krause Cleandro , Rodrigues Rute Imanishi
Published: February 2024

O ensaio resgata meandros de uma história iniciada em 2007 com o lançamento do Programa de Aceleração do Crescimento (PAC). A narrativa parte das contribuições do Instituto de Pesquisa Econômica Aplicada (Ipea) para o aperfeiçoamento de políticas públicas na área do desenvolvimento urbano, com foco em metodologias de avaliação de projetos e programas de urbanização de assentamentos precários. Trata-se de um frutífero esforço de pesquisa que sobrepassa o tema da urbanização de favelas, ao elaborar uma metodologia de elaboração e avaliação de projetos, programas e políticas adaptada à realidade nacional. São destacados os principais estudos do Ipea relacionados ao que passamos a denominar modelo lógico de engenharia reversa. Apresenta-se, também, um detalhamento crítico da experiência do instituto no Complexo do Alemão, vivência seminal para a equipe de pesquisadores envolvidos.
Mobilidade urbana no Brasil: principais estudos produzidos pelo Ipea nos últimos quinze anos
Authors: Carvalho Carlos Henrique Ribeiro de , Balbim Renato Nunes , Pereira Rafael , Correia Neto Vicente
Published: February 2024

O Instituto de Pesquisa Econômica Aplicada (Ipea) tem se destacado com a produção de estudos voltados para diagnósticos, análises comparativas e proposições para melhoria do sistema de mobilidade urbana do país. Os estudos realizados nos últimos quinze anos abordaram importantes questões conjunturais e estruturais da mobilidade nas cidades brasileiras e este trabalho procurou referenciar os mais impactantes. Por ocasião das manifestações populares de 2013, o Ipea prontamente desenvolveu uma série de estudos analíticos e propositivos, auxiliando a estratégia do governo na época para enfrentar a crise, com destaque para o diagnóstico da formação de custos e tarifas e as proposições para elaboração do pacto federativo pela melhoria do transporte. Houve também o desenvolvimento de estudos sobre tendências da mobilidade, mostrando o notável aumento do transporte individual e o declínio do transporte público nas últimas décadas, com impactos significativos sobre as condições de mobilidade da população e repercussões sobre a tarifa do transporte público. Na linha do desenvolvimento territorial houve vários estudos com diagnósticos sobre a acessibilidade da população às oportunidades, bem como estudos voltados para o desenvolvimento urbano integrado com foco no crescimento orientado para o transporte público. Destacam-se também estudos focados na mobilidade sustentável, em que a valorização do transporte não motorizado e do transporte público coletivo torna-se política crucial para reduzir as externalidades negativas produzidas nos sistemas de mobilidade urbana. Por fim, buscou-se referenciar os principais estudos desenvolvidos nos últimos quinze anos, criando um catálogo bibliográfico com as referências selecionadas. Para aprofundar-se nos assuntos, o leitor é convidado a buscar os textos no repositório do Ipea.
Realizing Justice40: Addressing Structural Funding Barriers for Equitable Community Engagement in Energy RD&D
Authors: Arkhurst Bettina K. , Green Williams Wyatt
Published: February 2024

The Justice40 Initiative, established by the Biden Administration through Executive Order 14008, aims to ensure 40% of the benefits associated with relevant governmental investments in areas such as climate and energy go to disadvantaged communities. However, persistent structural limitations pose challenges for energy researchers and engineers seeking to integrate justice into research, development, and demonstration (RD&D) activities, ultimately inhibiting full realization of Justice40. Using the Systemic Equity framework, this policy position paper highlights inadequacies in the U.S. Department of Energy’s (DOE) funding model and proposes changes to RD&D funding opportunity announcements (FOAs) to support the in-depth community engagement necessary for more equitable technology creation and demonstration. The recommended changes to FOAs are provided to encourage DOE Program Offices to rethink the RD&D funding process, the values that are fortified (intentionally or unintentionally) in that process, and systematically recenter RD&D processes on the goal Justice40 set out to achieve—a more just, equitable, and sustainable future.
Rethinking Civic Science Funding to Better Support Community Engagement
Authors: López Andrea Isabel , Feliú Mójer Mónica I.
Published: February 2024

Civic science funders and grantmakers play a key role in supporting community engagement efforts. However, current funding policies are often misaligned with the realities of community engagement. Collaboration with community partners moves at the speed of trust, and trust requires time, relationship-building, and persistence. Yet, many civic science grants have short timelines, burdensome reporting requirements, and are focused on quantitative outcomes. To realize the goals of civic science, grantmakers need to shift their practices to provide more flexible and long-term funding. This means extending funding periods from one year to multiple years, creating open communication channels to streamline and reduce reporting requirements and frequency, and valuing relationship-building as an important outcome.
Community-Driven Civic Science: Relationship Building to Prioritize Public Needs
Authors: Lu Kristine , O’Brien Colleen , Wickerson Grace
Published: February 2024

At a time of unprecedented emphasis and investment in civic science, policymakers must grapple with whether existing civic science practices deliver on intended public benefits. Civic science, if poorly managed, can exploit communities due to inherent power imbalances between researchers and the public. For community stakeholders to guide or lead civic science—an approach we call community-driven civic science—we must invest in the relational infrastructure and relational capacity for scientists to build authentic relationships with communities. Relational infrastructure investments should include modifications to criteria for academic advancement—like tenure, expansion of funding sources, and grant reporting structures redesigned to focus on ongoing evaluation of community stakeholders’ value gained. Relational capacity building should include financial stipends for community members, training resources, and staff professional development. These investments will cultivate a new generation of civic scientists and scientifically engaged communities to collaborate towards using science for public benefit.
From Intent to Impact: Enabling Transdisciplinary Research for Responsible Scientific Stewardship
Authors: Sinclair Wilson
Published: February 2024

Global challenges are complex and must be tackled in a holistic manner. Understanding and addressing them requires collaboration across disciplines, often uniting the humanities and social and natural sciences, to ask better questions and identify practical and revolutionary solutions. Universities can be excellent vehicles for transformational change as they educate the next generation of civically-motivated thinkers to create meaningful action and impact. Too often systemic, artificial barriers exist within these institutions that prevent meaningful transdisciplinary collaboration from succeeding. We recommend that universities identify grand challenges and foster a culture of cross-department collaboration with appropriate internal and external resources to enable broader impacts. Together, funders and institutional policymakers play a critical strategic role in fostering civic scientists and transdisciplinary researchers to solve multifaceted global problems.
Extreme Variability Quasars in Their Various States. II. Spectral Variation Revealed with Multiepoch Spectra
Authors: Ren Wenke , Wang Junxian , Cai Zhenyi , Hu Xufan
Published: February 2024

We previously built a sample of 14,012 extremely variable quasars (EVQs) based on Sloan Digital Sky Survey (SDSS) and Pan-STARRS1 photometric observations. In this work we present the spectral fitting to their SDSS spectra and study the spectral variation in 1259 EVQs with multiepoch SDSS spectra (after prudently excluding spectra with potentially unreliable spectroscopic photometry). We find a clear “bluer-when-brighter” trend in EVQs, consistent with previous findings of normal quasars and active galactic nuclei. We detect significant intrinsic Baldwin effect (iBeff, i.e., smaller line equivalent width at higher continuum flux in individual active galactic nuclei) in the broad Mg ii and C iv lines of EVQs. Meanwhile, no systematical iBeff is found for the broad Hβ line, which could be attributed to strong host contamination at longer wavelengths. Remarkably, by comparing the iBeff slope of EVQs with archived changing-look quasars, we show that the changing-look quasars identified in the literature are most likely a biased (due to its definition) subpopulation of EVQs, rather than a distinct population of quasars. We also found no significant broad line breathing of Hβ, Mg ii, or C iv, suggesting the broad line breathing in quasars may disappear at longer timescales (∼3000 days).
Discovery of Kiloparsec-scale Semirelativistic Fe Kα Complex Emission in NGC 5728
Authors: Trindade Falcao Anna , Fabbiano G. , Elvis M. , Paggi A. , Maksym W. P. , Karovska M.
Published: February 2024

We present Chandra ACIS-S imaging spectroscopy results of the extended (1.″5–8″, 300–1600 pc) hard X-ray emission of NGC 5728, the host galaxy of a Compton-thick active galactic nucleus. We find spectrally and spatially resolved features in the Fe Kα complex (5.0–7.5 keV) redward and blueward of the neutral Fe line at 6.4 keV in the extended narrow-line region bicone. A simple phenomenological fit of a power law plus Gaussians gives a significance of 5.4σ and 3.7σ for the red and blue wings, respectively. Fits to a suite of physically consistent models confirm a significance of ≥3σ for the red wing. The significance of the blue wing may be diminished by the presence of rest-frame highly ionized Fe xxv and Fe xxvi lines (1.4σ–3.7σ range). A detailed investigation of the Chandra ACIS-S point-spread function and comparison with the observed morphology demonstrates that these red and blue wings are radially extended (∼5″, ∼1 kpc) along the optical bicone axis. If the wing emission is due solely to redshifted and blueshifted high-velocity neutral Fe Kα, then the implied line-of-sight velocities are +/− ∼0.1c, and their fluxes are consistent with being equal. A symmetric high-velocity outflow is then a viable explanation. This outflow has deprojected velocities ∼100 times larger than the outflows detected in optical spectroscopic studies, potentially dominating the kinetic feedback power.
Comprehensive Connection among the Quasars with Different Types of Outflow Absorption Lines
Authors: Peng Xing-Long , Chen Zhi-Fu , He Zhi-Cheng , Pang Ting-Ting , Wang Zhi-Wen
Published: February 2024

It is commonly accepted that outflows from the central regions of quasars play a substantial role in regulating the global properties of the host galaxy. These outflows are typically detected through blueshifted absorption lines. However, the question remains whether outflows observed with different absorption line types indeed reflect the same environmental or evolutionary stage of the host galaxy. In this study, we use the Sloan Digital Sky Survey quasar catalog and employ the flux ratio of [O II] and [Ne V] emission lines as indicators to compare star formation rates (SFRs) within host galaxies of quasars exhibiting various outflow absorption line types: low-ionization broad absorption line (LoBAL), low-ionization Mini-BAL (LoMini-BAL), low-ionization narrow absorption line (LoNAL), high-ionization broad absorption line (HiBAL), high-ionization Mini-BAL (HiMini-BAL), and high-ionization narrow absorption line (HiNAL). Our findings indicate that the SFR of LoMini-BAL quasars is comparable to that of LoNAL quasars, somewhat less than that of LoBAL quasars, but markedly greater than that of HiBAL quasars. Furthermore, the SFR of HiMini-BAL quasars mirrors that of HiNAL or Non-abs (no associated absorption lines) quasars, but is significantly higher than that of HiBAL quasars. If we consider that differing absorption line types are indicative of the quasar evolution stage, our results propose an inclusive evolution sequence: LoBALs evolve into LoMini-BALs/LoNALs, then progress to HiBALs, and ultimately morph into HiMini-BALs/HiNALs/Non-abs. Concomitantly, the SFR within the host galaxies of quasars appears to decline noticeably nearing the LoNAL phase’s end and rejuvenates before the HiMini-BAL phase.
Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. IV. Long-term Doppler Spectroscopy for 11 Stars Thought to Host Cool Giant Exoplanets
Authors: Dalba Paul A. , Kane Stephen R. , Isaacson Howard , Fulton Benjamin , Howard Andrew W. , Schwieterman Edward W. , Thorngren Daniel P. , Fortney Jonathan , Vowell Noah , Beard Corey , Blunt Sarah , Brinkman Casey L. , Chontos Ashley , Dai Fei , Giacalone Steven , Hill Michelle L. , Kosiarek Molly , Lubin Jack , Mayo Andrew W. , Močnik Teo , Akana Murphy Joseph M. , Petigura Erik A. , Rice Malena , Rubenzahl Ryan A. , Van Zandt Judah , Weiss Lauren M. , Dragomir Diana , Kipping David , Payne Matthew J. , Roy Arpita , Teachey Alex , Villanueva Steven
Published: February 2024

Discovering and characterizing exoplanets at the outer edge of the transit method’s sensitivity has proven challenging owing to geometric biases and the practical difficulties associated with acquiring long observational baselines. Nonetheless, a sample of giant exoplanets on orbits longer than 100 days has been identified by transit hunting missions. We present long-term Doppler spectroscopy for 11 such systems with observation baselines spanning a few years to a decade. We model these radial velocity observations jointly with transit photometry to provide initial characterizations of these objects and the systems in which they exist. Specifically, we make new precise mass measurements for four long-period giant exoplanets (Kepler-111 c, Kepler-553 c, Kepler-849 b, and PH-2 b), we place new upper limits on mass for four others (Kepler-421 b, KOI-1431.01, Kepler-1513 b, and Kepler-952 b), and we show that several confirmed planets are in fact not planetary at all. We present these findings to complement similar efforts focused on closer-in short-period giant planets, and with the hope of inspiring future dedicated studies of cool giant exoplanets.
Sentiment Analysis of Code-Mixed Text: A Comprehensive Review
Authors: Perera Anne , Caldera Amitha
Published: February 2024

Sentiment Analysis is the task of identifying and extracting the opinion expressed in a text to determine the writer's perception of an entity. Due to globalization, people often mix two or more languages and use phonetic typing and lexical borrowing in web communication. This concept is known as code-mixing. Although extracting the opinion of text written in monolingual languages is simple and straightforward, Sentiment Analysis of code-mixed text is challenging. Classifiers fail within the context of the code-mixed text as text may consist of creative writing, spelling variations, grammatical errors, and different word orders. Hence, SA of code-mixed text is an interesting, challenging, and popular research area. This paper presents the state-of-the-art in Sentiment Analysis of code-mixed text by discussing each concept in detail. The paper also discusses the focused areas, techniques used, limitations, and performances of the studies related to code-mixing.
The strong consistency and asymptotic normality of the kernel estimator type in functional single index model in presence of censored data
Authors: Attaoui Said , Bentata Billal , Bouzebda Salim , Laksaci Ali
Published: February 2024

In the present study, we address the nonparametric estimation challenge related to the regression function within the Single Functional Index Model in the random censoring framework. The principal achievement of this investigation lies in the establishment of the asymptotic characteristics of the estimator, including rates of almost complete convergence. Moreover, we establish the asymptotic normality of the constructed estimator under mild conditions. Subsequently, we provide the application of our findings towards the construction of confidence intervals. Lastly, we illuminate the finite-sample performance of both the model and the estimation methodology through the analysis of simulated data and a real-world data example.
On a new structure of multi-term Hilfer fractional impulsive neutral Levin-Nohel integrodifferential system with variable time delay
Authors: Abdeljawad Thabet , Thabet Sabri T. M. , Kedim Imed , Vivas-Cortez Miguel
Published: February 2024

The Levin-Nohel equations play key roles in the interpretation of real phenomena and have interesting applications in engineering and science areas, such as mathematical physics, mathematical biology, image processing, and numerical analyses. This article investigates a new structure for the delay neutral Levin-Nohel integrodifferential (NLNID) system via a Hilfer fractional derivative and is supplemented by initial and instantaneous impulse conditions. A fractional integral equation corresponding to the proposed system is derived and used to prove the existence and uniqueness of the solution with the help of the Banach contraction principle. Additionally, the Ulam-Hyers-Mittag-Leffler (UHML) stability is studied by utilizing the generalized Gronwall's inequality and nonlinear analysis issues. As a consequence, the Ulam-Hyers (UH) stability and generalized UH are also deduced. Furthermore, the Riemann-Liouville ($ \mathcal{R.L.} $) and Caputo fractional versions of the proposed system are discussed. Finally, numerical applications supported with tables and graphics are provided to test the exactitude of the findings.
YOLO-DCNet
Authors: Wu YiHeng , Dong Jiaqiang , Chen JianXin
Published: February 2024

Enhanced processors empower edge devices like smartphones for human detection, yet their application is constrained by algorithmic efficiency and precision. This paper introduces YOLO-DCNet, a lightweight neural network detector built upon YOLOv7-tiny. Incorporating a dynamic multi-head structural re-parameterization (DMSR) module within its backbone network enables effective processing of the features utilized in the model. To improve multi-scale feature aggregation, the model integrates a channel information compression and linear mapping (CLM) module into its feature pyramid architecture. Moreover, the optimization of training and inference performance is achieved by employing RepVGG blocks between the main computational modules of the model. Experimental data reveal that the enhanced YOLOv7-tiny model achieves a 31.7% faster inference speed and marginal gains of 0.7% in mAP@0.5 and 0.5% in mAP@0.5:0.95 over the original. This underscores the model's improved performance and applicability for real-time human detection on edge devices across diverse applications.
Platelet-rich plasma for the treatment of scleroderma-associated ulcers: a single-center experience and literature review
Authors: Condorelli Alessandra Grazia , Paganelli Alessia , Marraccini Chiara , Ficarelli Elena , Motolese Alfonso , Contu Luca , Motolese Alberico
Published: February 2024

Systemic sclerosis (SS) is a complex connective tissue disease characterized by vasculopathy and progressive fibrosis, primarily considered an autoimmune disorder. SS can affect multiple organs and tissues, including the skin, respiratory, gastrointestinal, genitourinary, cardiovascular, and musculoskeletal systems. Skin involvement is common, and SS-related ulcers, especially digital ulcers, occur in roughly 50% of patients. These ulcers not only cause pain but also significantly impact patients' quality of life, and in severe cases, they can lead to infection, gangrene, and amputation. The search for novel therapies for scleroderma-related ulcers remains an ongoing research area. Platelet-rich plasma (PRP) has been investigated as a potential treatment for difficult-to-heal ulcers, including diabetic, pressure, and vascular ulcers. In this study, we share our experience in treating scleroderma ulcers with PRP. Ten patients with confirmed SS and chronic skin ulcers lasting at least six weeks, which had not responded to conventional treatments, were selected for the study. Homologous PRP gel was prepared and applied once a week for up to eight weeks. The ulcers were documented photographically before and after PRP treatment, and pain levels were assessed using a visual analog scale (VAS). We also conducted a systematic review of the literature focusing on the use of PRP in the setting of SS. The results from our casuistry showed that the ten patients, including eight females and two males with a median age of 52.5 years, had ulcer sizes ranging from 0.78 cm2 to 28.26 cm2. The ulcers were located on fingers, legs, and heels, and they were associated with various forms of SS, including limited and diffuse cutaneous involvement. Raynaud's phenomenon was prevalent, and two patients exhibited organ involvement. The average ulcer size at the end of PRP treatment decreased significantly, with a 78% reduction in ulcered area. Pain levels also markedly improved, as indicated by a reduction in VAS scores. With regards to systematic revision of literature, we retrieved 45 cases of SS treated with PRP-based therapeutic regimes. However, only a minority of them (n=16) underwent PRP treatment for the treatment of SS-related ulcers. An improvement in wound size and pain has been documented in all cases. Taken together, these data highlight the potential benefits of using homologous PRP in the treatment of scleroderma ulcers, emphasizing its positive impact on ulcer size reduction and pain relief.
Interface pressures and stiffnesses of different bandages studied on a Hiraï leg
Authors: Benigni J-P , UHL JF , Balet F , Filori P
Published: February 2024

Hirai et al. have developed a tool to assess the in vitro pressures of different compression devices. This tool has the advantage of being easy to use and finally inexpensive. The study of 7 bandages (Biflex 16, Urgo K2, Urgo K1, Coban 2, Biflex kit, Rosidal K and Rosidal Sys) on a Hirai leg allowed a precise analysis of the evolution of pressures and stiffnesses. Interface pressures were measured using the Picopress system and a 5 cm diameter probe. The difference between pre-stretch and stretch pressures in mmHg characterized stiffness. If the difference is greater than 10 mmHg, the bandage is considered stiff. These bandages were applied with a pressure of 45±2 mmHg at point B1. One hundred extension maneuvers were then performed. A decrease in mean pre-stretch pressures was noted more frequently for Rosidal K, Urgo K1 and Coban 2 than for the other bandages. Biflex 16 has a stiffness of less than 10 mmHg (p<0.001). Urgo K1, Urgo K2, Coban 2, Kit Biflex have very similar stiffnesses (p=ns). Rosidal K and Rosidal Sys have higher stiffness (p<0.001).
Extraskeletal Mesenchymal Chondrosarcoma of Central Nervous System – A Rare but Aggressive Tumor
Authors: Chatterjee Debajyoti , Radotra Bishan D , Madan Renu , Gupta Sunil K
Published: February 2024

Background:

Extraskeletal mesenchymal chondrosarcoma (MCS) of the central nervous system (CNS) is extremely rare. Herein, we present the clinicopathological features of five CNS extraskeletal MCS.

Material and Methods:

Over the past 10 years, five cases of CNS MCS have been retrieved from in the archives of histopathology department. All biopsies were stained with vimentin, S-100, CD99, desmin, GFAP, INI1, WT1, STAT6, and EMA.

Results:

There were four males and one female patient in the age group of 1.5–35 years. The clinical and radiological impression was meningioma in three cases, glomus jugulare and primitive neuroectodermal tumor in one case each. All showed classic biphasic morphology, areas of undifferentiated small blue round cells sharply demarcated from the island of cartilage. Three patients experienced multiple recurrences and died subsequently.

Conclusion:

Extraskeletal MCS of CNS is rare and favors children and young adults. They show aggressive behavior and tend to recur despite surgery and radiotherapy.
Anti-cancer effects of green synthesized gold nanoparticles using leaf extract of Annona muricata. L against squamous cell carcinoma cell line 15 through apoptotic pathway
Authors: Mary S. Jeslin , Veeravarmal Veeran , Thankappan Prasanth , Arumugam Paramasivam , Augustine Percy Ida , Franklin R.
Published: February 2024

Background:

Oral cancer remains one of the most dreadful diseases in developing nations. Currently, there has been a rise in the prevalence of tongue squamous cell carcinoma (SCC), with a poor prognosis. The use of standard treatment approaches against oral cancer patients brings about several side effects. In recent years, nanomedicine has provided a versatile platform for developing new targeted therapeutic modalities. However, safety remains a concern in the synthesis of nanoparticles (NPs). Therefore, the present study aims to synthesize safer phytoconstituent-mediated gold NPs (AuNPs) utilizing leaf extracts of Annona
muricata, where the biochemical components of the plant leaf act as the reducing and capping agents in the synthesis of NPs, and to evaluate its anti-cancer activity against SCC.

Materials and Methods:

In this in vitro experimental study, AuNPs were synthesized through an effective, simple, and ecologically sound green synthesis method. After characterization of these synthesized AuNPs, in vitro assays such as 3-(4, 5-dimethylthiazole2-yl)-2, 5-biphenyl tetrazolium bromide, wound healing, and clonogenic assays were carried out to investigate the anti-cancer potential of green synthesized AuNPs in the human tongue SCC cell line (SCC-15), and the possible mechanism of action was evaluated through gene and protein expression analysis of Bax, Bcl-2, and p53 genes. The results were expressed as mean ± standard deviation using Statistical Package for Social Sciences (SPSS) 20.0 software and Student's t-test was performed for experimental data. P ≤0.05 were considered statistically significant.

Results:

The in vitro assays demonstrated that the synthesized AuNPs are exhibiting anti-cancer activity by apoptosis of SCC-15 cells in a dose-dependent manner. Further, it also revealed a highly significant decrease in anti-apoptotic Bcl-2 gene expression, whereas pro-apoptotic genes p53 and Bax revealed a highly significant increase, which is statistically significant compared to the control (P < 0.05).

Conclusion:

Our findings demonstrated that the AuNPs synthesized from A.
muricata leaf extract could act as a novel anticancer agent, particularly against SCC, after further scrutiny.
Schwannoma-like pleomorphic adenoma: A pathological quandary
Authors: Gautam Rashmi , Tomar Reena , Rana Deepika , Khurana Nita , Singh Ishwar
Published: February 2024

Pleomorphic adenoma usually presents as a painless growing mass in locations of the salivary glands and is notorious for local recurrence if previous surgical resection is incomplete. Schwannoma is a benign peripheral nerve tumor with microscopic features of sheets of spindle-shaped cells with nuclear palisading. However, when a pathologist encounters a salivary gland tumor with microscopic morphological features of biphasic components with areas of schwannoma-like morphology, it is crucial to make a prudent diagnosis by differentiating Schwannoma-like pleomorphic adenoma and its differential diagnosis as they have remarkably different outcome in patients. We herein present a case of Schwannoma-like pleomorphic adenoma and discuss its approach to diagnosis and literature search.
A Multi-centric retrospective study into the epidemiological distribution of breast cancer patients in India
Authors: Reddy Vijay Anand , Sarin Ramesh , Panda Dipanjan , Hanitha RNM , Jain Jugnu , Chatterjee Soma , Annapurneswari S , Saipillai Mohamed Zehran , Gupta Shaikat , Khan Enamuddin , Bhattacharya Jibak , Bhandari Trilok Prasad Singh , Prasad S. V. S. S. , Swain Meenakshi
Published: February 2024

Background:

A multicentric private hospital-based retrospective study was conducted to understand the epidemiology of breast cancer in terms of demographics and clinical characteristics (staging and hormone receptor status) at the time of diagnosis.

Methods:

The data for 5,688 female breast cancer patients were collected from the hospital and clinical records of four study centres. All statistical analysis was performed using Microsoft Excel 2016 and R software. Survival was estimated by the Kaplan-Meier method and compared by the log-rank test. A P value of <.05 was considered statistically significant.

Results:

The mean and median age of the study population was 52.6 (± 12.4) years and 53.0 (range 51-54 across the four centers) years, respectively. About 68% of patients were in the age category of 41 65 years, 17.6% were <40 years old among whom 23.4% of patients reported a positive family history. Most of the patients (66.3%) were diagnosed at an early stage (Stage I and II). The 3-year OS probability was 100%, 97.5%, 94.1%, and 74.7% for TNM Stages I, II, III, and IV, respectively. The 3-year RFS was 95.7%, 95.5%, 84.5%, and 49% for TNM Stages I, II, III, and IV, respectively.

Conclusion:

The present study highlights the epidemiological distribution of breast cancer patients. It emphasizes the importance of disease awareness among the urban and educated female population as most patients were diagnosed at earlier stages and demonstrated higher OS and RFS than reported in government registries.