bluuebunny/crossref_metadata_2025 huggingface dataset:
LEARNING BASIC ECONOMIC SUBJECT BY USING GRAPHIC INTERACTIVE METHOD
Authors: MOHD HATTAR NURRUL AZMI , HALABI AZAHAR MUSTAFFA
Published: December 2024

In the era of information technology that moves so fast, it affects people's lives a lot. The use of ICT in various sectors cannot be denied anymore. The education sector is also no exception where a combination of ICT and interactive graphics are used in teaching and learning sessions. Almost all parties involved in education use it including teachers and students. It becomes a teaching aid that provides many benefits to all parties. This systematic literature review explores the significance of integrating graphic interactive methods into basic economic education. Through an analysis of studies retrieved from the Mendeley database, key findings reveal the positive impact of these methods on learning outcomes, including increased student engagement and improved conceptual understanding. Student and instructor perspectives emphasize heightened motivation and satisfaction, while comparative analyses consistently demonstrate the superiority of graphic interactive methods over traditional approaches. Recommendations for educators include embracing variety, providing training, and fostering a student-centered approach, while curriculum developers are urged to align tools with learning objectives and consider cultural relevance. Overall, this research underscores the transformative potential of graphic interactive methods in enhancing economic education and preparing students for the complexities of the modern world.
Tromboembolismo pulmonar tras cierre de orejuela: ¿cómo ha llegado ahí el trombo?
Authors: Sánchez Vega Juan Diego , Pascual Izco Marina , De la Fuente Viana Ana , Díaz Dorronsoro Ines , Bastarrika Alemañ Gorka
Published: December 2024

El cierre percutáneo de la orejuela izquierda es un tratamiento cada vez más expandido de cara a evitar la anticoagulación en paciente con fibrilación auricular y alto riesgo hemorrágico. No obstante, en un pequeño porcentaje de pacientes se puede producir una trombosis sobre el dispositivo. Las herramientas fundamentales para caracterizar la anatomía y trayecto de los posibles trombos son la ecocardiografía, sobre todo transesofágica, y la tomografía computarizada (TC) con contraste. En este caso, presentamos a una paciente con una trombosis del dispositivo que además presentaba de forma simultanea un tromboembolismo pulmonar paradójico desde este trombo en la aurícula izquierda, diagnosticado mediante TC cardiaco.
Laubry-Pezzi del adulto en resonancia magnética cardíaca. Reporte de un caso
Authors: Aristizabal-Colorado David , Weir Restrepo Danilo , Sierra Castillo Santiago , Tamayo Orozco María Antonia , Carvajal Vélez María Isabel
Published: December 2024

El síndrome de Laubry-Pezzi es una entidad congénita poco frecuente, descrita como un prolapso de un velo de la válvula aórtica debido a una comunicación interventricular subyacente. En la literatura se encuentran descritos algunos casos diagnosticados mediante ecocardiografía, no por medio de resonancia magnética (RMN) cardíaca. Se reporta el caso de un paciente de 26 años, con 2 años de diagnóstico de insuficiencia aórtica e insuficiencia cardíaca de origen valvular, al que se detecta un defecto en el septo interventricular, por medio de RMN cardíaca. Este síndrome es inusual en adultos y, además, hasta la fecha, no hay casos descritos mediante RMN, un método de alta eficacia en la detección de defectos cardíacos
Impacto del método mindfulness en el fortalecimiento de habilidades socioemocionales en la generación Alpha
Authors: Leon Pluas Edwin , Carvajal Morales Jessica , Carvajal Morales Daira
Published: December 2024

La generación Alpha enfrenta la necesidad de implementar paradigmas, tendencias educativas, métodos, técnicas y estrategias de aprendizaje que respondan tanto a las demandas sociales como a los desafíos educativos del siglo XXI, ajustándose a sus ritmos y estilos de aprendizaje particulares. Entre las metodologías contemporáneas ampliamente utilizadas en diversos campos, incluido el ámbito educativo, destaca el mindfulness. Esta práctica se define por su capacidad para fomentar la atención plena, la concentración, la autorregulación emocional, la apertura a nuevas experiencias y el desarrollo de la conciencia, elementos clave que potencian la adquisición de habilidades socioemocionales.
En este contexto, la presente investigación se planteó como objetivo principal analizar la influencia del mindfulness en el desarrollo de las competencias socioemocionales en estudiantes pertenecientes a la generación Alpha. Se llevó a cabo un estudio básico de enfoque cuantitativo, con un diseño no experimental, descriptivo y transversal. Para la recolección de datos, se utilizó una encuesta basada en un cuestionario que abordó las variables del estudio.
Los resultados evidenciaron que el 64,5% de los estudiantes reportaron una alta influencia del mindfulness en el desarrollo de sus habilidades socioemocionales, mientras que el 23,5% mostraron una influencia moderada y el 12% una influencia baja. Estos hallazgos subrayan la efectividad de esta metodología para afrontar los desafíos contemporáneos, mejorar la regulación emocional, fortalecer las competencias socioemocionales, optimizar las relaciones interpersonales y fomentar la empatía. En conjunto, estas habilidades resultan fundamentales para facilitar la adaptación de los individuos a los constantes cambios de la sociedad actual.
Una Mirada a la Investigación Multidisciplinaria
Authors: Pachas Huaytan Jorge Vladimir , Palomino Vargas Jorge Luis , Vega Flores Jorge Alberto , Baldeon Tovar Magno Teófilo , Medina Pelaiza Luz Edga
Published: December 2024

Introducción. La Calidad de Vida (CV) del personal de enfermería es un tema de mucho interés, porque las interacciones con el paciente requieren de un compromiso físico y psicológico. Cualquier alteración en la calidad de vida, afecta componentes en el ámbito de su salud, como disminución de las funciones músculo esqueléticas, agotamiento o cansancio emocional, trastornos gastrointestinales, entre otros. Objetivo. Identificar la calidad de vida del personal de enfermería de una institución de salud al Sur de Veracruz. Metodología. Estudio de alcance descriptivo de corte transversal, con una muestra de 69 enfermeros (as), elegidos mediante muestreo de tipo no probabilístico por conveniencia, los instrumentos utilizados fueron, una cedula de datos sociodemográficos y el WHOQOL-BREF. Resultados. El 58% de los participantes fueron mujeres en un rango de edad de 29-33 años (29%). La calidad de vida general tuvo una percepción de nivel medio ya que el puntaje general se estableció en x̅ 62. 9. Por dimensión, la que presentó menor puntaje fue salud física con una media de 58.8. Conclusión. De acuerdo con el cuestionario WHOQOL-BREF, el personal de enfermería de la institución presentó algunas afectaciones físicas que podrían afectar su desempeño de cuidador y disminuir la calidad de la atención.
Incidencia de los Juegos Predeportivos en el Consumo VO2 MÁX en Estudiantes de BGU
Authors: Lema Villalba Klever Geovanny , Pacha Freire Jenny Alexandra , Toasa Núñez Sandro Xavier , Laguatasig Bonilla Leydi Susana , Navas Núñez Alex Fernando
Published: December 2024

El presente libro es una contribución para conocer la importancia de los Juegos Predeportivos, como se aplica en el sistema educativo, cuáles son los objetivos de los juegos, los beneficios, que habilidades y destrezas se desarrollan con su aplicación, metas de las diferentes actividades, entre otras particularidades de los juegos. En el medio educativo es imprescindible las actividades de los juegos predeportivos, de modo que, esto permite la integración de todos los educandos y su integración en el medio, ahora bien, no se pretende únicamente la diversión del estudiante, si no que, se practique los valores y en muchos de los casos se cambie de actitud aceptando el respeto a las reglas del juego.
Los juegos predeportivos contribuyen a establecer diferentes actividades menores, es decir, se desagrega una cadena de juegos pequeños que es de aporte para las diferentes edades, sus características y reglas son diferentes una de otra actividad que son propicias en la adquisición de determinados movimientos, acciones y habilidades que posee el estudiante.
Previo a realizar las actividades predeportivas es de mucha importancia, iniciar con un precalentamiento, una lubricación articular y sobre todo predisponer al organismo a tener una fluidez activa desde el inicio del juego. Con todo lo antes mencionado, el estudiante tendrá un mejor rendimiento aeróbico, esto permite combinar distintas facetas como el entrenamiento, el desarrollo físico, el estímulo mental, y la activación cognitiva en el desarrollo del juego. Las actividades predeportivas tienen como misión contribuir al desarrollo del niño y el ser humano en sus diferentes facetas a través del juego.
Igualmente, los juegos de resistencia son los que estimulan la capacidad de permanecer la mayor cantidad de tiempo ante un esfuerzo sostenido, a través del esfuerzo aeróbico. El VO2 MÁX es la capacidad de realizar un trabajo de forma eficaz durante el máximo de tiempo posible. De esto se infiere que, los juegos predeportivos favorecen a un notable desarrollo del VO2 MÁX, puesto que las actividades de movimiento permiten al sistema cardiovascular una aceleración de su ritmo, por ende, se obtiene un bombeo de sangre en óptimas condiciones.
Huellas un caminar de Maestro
Authors: Díaz Pereira Víctor Hugo
Published: December 2024

Este libro está cargado de sentimientos encontrados desde el primer momento en que la vida me dio la oportunidad de ser un maestro de escuela rural.
El ser maestro ayer, hoy y siempre es un reto no tan fácil de lograrlo, pues implica mucha responsabilidad, ya que la vida es un gran reto de solo vivirla con objetivos muy claros, es por ello que aquí encontrarás historias que me motivaron a escribir y poder contarles lo que es más sencillo y más complicado en esta noble misión de servicio a la sociedad que a veces tiene todo y en otros momentos no tiene nada, es entonces donde surge el maestro para fortalecer a quienes ven derrumbadas sus esperanzas y que creen que son diferentes a los otros. Es hermoso enseñar a quienes comienzan en un mundo sumergido en sus creencias y prejuicios y cuando te das cuenta sus ideas y pensamiento ya cambiaron y están mirando a la vida como algo que no la deben dejar pasar estando vivos y que ellos sientan que su vida vale la pena vivirla.
Los nombres que usaré en esta historia de vida serán inspirados por mis recuerdos y agradecimiento y que seguro cuando lean mi memoria se darán cuenta de los personajes de quienes estoy hablando y estos me ayudarán a escribir lo que siempre quise hacer y poder mostrarles el panorama de cómo ser ¡un maestro de escuela!
IN VITRO ASSESSMENT OF ANTIUROLITHIATIC ACTIVITY OF APIGENIN WITH NITRIC ALGINATE VARIATION IN NANOSUSPENSION
Authors: Neneng Nasliah  , Suci Nurainun  , Ghina Annufus  , Audy Nursifa'atun  , Aufalya Wibirezkina  , Sofi Nurmay Stiani
Published: December 2024

Kidney stones are hard kidney material, such as stones that originate from minerals and salts. Alternative therapy using medicinal plants as anticalculi is an option for treating kidney stones. One plant with anticalculi activity is celery, which contains various active chemical compounds, including apigenin. Apigenin is a diuretic that can help the kidneys remove excess fluid and salt from the body. However, apigenin has low solubility in water. To overcome the limited solubility of apigenin, nanosuspensions were prepared. This study aimed to formulate a nanosuspension, evaluate its preparation, and test it in vitro. This formula uses the concentration of the suspending agent, Na. The different alginates were F0 without active  substances (0%) and F1 (1%), F2 (2%), and F3 (3%). The evaluation of the preparation includes tests for pH, viscosity, specific gravity, particle size, zeta potential, and adsorption efficiency. The results showed that the preparation had an average pH value of 4-7, an average viscosity value of 78-162 cP, a specific gravity of 0.98-1.02 g/mL, the preparation had a particle size of 928–974 nm, zeta potential of-26, 3 to -41.7, and an average entrapment efficiency of 99.63%-99.64%. Apigenin nanosuspension preparations can dissolve kidney stone calcium at 1800-7800 ppm. The test results showed that the apigenin nanosuspension has the potential to dissolve calcium kidney stones.
Keywords: kidney stones, apigenin, in vitro, nanosuspension
FORMULATION AND IN VITRO PENETRATION TESTING OF NUTMEG SEED OIL (Myristica fragrans Houtt.) NANOEMULGEL
Authors: Lailah Nashfiatun Nur , Syaputri Fauziah Ningrum , Larasati Rizky Dwi , Fatimi Hana Anisa , Manurung Devi Yanthre Sari
Published: December 2024

Nutmeg seed oil has a low absorption time and is unstable during storage; therefore, so to facilitate this it is made in a nanoemulgel form because it can increase contact time and increase drug penetration into the skin. This study aimed to determine the effect of variations in nutmeg seed oil concentration on the physical characteristics and penetration rate of nanoemulgel preparations. Nanoemulgel was made by mixing the nanoemulsion phase into a gel base with oil concentrations of 4.5%, 5%, and 5.5%. The nanoemulsion physical characteristics results are 90.7–91.1% for the turbidimetry test, 453–516 nm for particle size, 42.4–48.6 mV for the zeta potential test, 6.46–6.66 for the pH test, and O/W for nanoemulsion type. Physical characteristics included organoleptic tests, homogeneity, pH, adhesive power, spreadability, viscosity, and rheology. The penetration rate was determined using the Franz diffusion-cell method. The results showed that the nanoemulgel preparation was white in color and had a characteristic smell of nutmeg oil, a semisolid, homogeneous texture, skin pH of 4.5–6.5, spreadability met the range of 5–7 cm, adhesion of >4 seconds, viscosity of 4000–50000 cPs, and pseudoplastic flow properties. The best formulas are found in Formulas 1 and 2 because the stability test meets the requirements for good physical characteristics. Variations in the concentration of nutmeg oil did not show any influence on the penetration rate, with the flux values ??obtained for each formula being F1 0.0117 mg/cm2hour-1, F2 0.0126 mg/cm2hour-11, and F3 0.0246 mg/cm2hour-1.
ANÁLISE DA HIGROSCOPICIDADE DO CORANTE EM PÓ DE PITAYA VERMELHA (Hylocereus Costaricencis) CULTIVADA NA REGIÃO AMAZÔNICA
Authors: Santana D. L. , Faria L. J. G.
Published: December 2024

Objetivo: Realizar o estudo do comportamento higroscópico do corante em pó de pitaya em ambientes com temperaturas controladas, visando à construção de isotermas de sorção (adsorção e dessorção), necessárias ao estabelecimento das condições ótimas de secagem e armazenamento. Métodos: A metodologia utilizada foi da exposição da amostra a três temperaturas de trabalhos (20, 30 e 40ºC), utilizando-se no experimento estufa incubadora DBO (demanda bioquímica de oxigênio). Avaliar através dos modelos matemáticos a predição das isotermas. Resultados: A partir das análises das curvas de higroscopicidade, se conclui que o corante em pó de pitaya tem um comportamento higroscópico elevado. As isotermas obtidas foram classificadas como do tipo III e o modelo de GAB mostrou-se mais apropriado para ser utilizado na predição das isotermas de sorção do produto. Conclusão: Que o material por possuir uma alta higroscopicidade deverá ser conservado em recipientes especiais, que os pretejam de absorver umidade e assim conservar suas características químicas e físicas.
A Privacy Preservation Model for URL Query Strings Based of Local Links Based on Temporary Tables
Authors: Riyana Surapon , Sasujit Kittikorn , Homdoung Nigran
Published: December 2024

The URL (Uniform Resource Locator) is a unique identifier for locating a resource online. It generally includes a protocol (e.g., HTTP or HTTPS), a subdomain (e.g., WWW), a domain name, a path or webpage, and parameters in the form of URL query strings (HTTP.GET). The parameters proposed to identify the content of the destination webpage, e.g., the user prole, the user activities, or the details of the specified object. Thus, the destination webpage can pose privacy concerns when made publicly available. To rid these concerns in the local link of websites, a new privacy preservation model is proposed in this work. It is based on a temporary table. Aside from addressing privacy violation issues, a significant aim of the proposed models is to maintain the data utility as much as possible. Furthermore, the proposed model is evaluated by using extensive experiments. The experimental results show that the proposed model is an effective privacy preservation model that can be used to address privacy violation issues in URL query strings.
ДНЕВНИКОВЫЕ ЗАПИСИ ВРАЧЕЙ КАК УЧЕБНЫЙ МАТЕРИАЛ НА ЗАНЯТИЯХ ПО РУССКОМУ ЯЗЫКУ КАК ИНОСТРАННОМУ СО СТУДЕНТАМИ-МЕДИКАМИ
Authors: Шапошникова А.П.
Published: December 2024

В России обучается около 355 тысяч иностранных студентов, среди которых особой популярностью пользуется медицинская специальность, занимающая первое место по входящей мобильности. В связи с этим перед преподавателем стоит задача воспитания вторичной языковой личности на иностранном языке, для решения которой необходимо организовать определенную коммуникативную среду / пространство и, что немаловажно, ввести страноведческую и лингвокультурологическую информации. Актуальность данного исследования обусловлена недостаточным количеством учебного материала по русскому языку для иностранных обучающихся. Цель статьи – выявить и описать лингвострановедческий и языковой потенциал использования дополнительных источников информации для студентов-медиков и представить методическую разработку на их основе. Материалом для создания рабочих листов послужили фрагменты из «Дневника хирурга» А. А. Вишневского. В заключение делается вывод о потенциале дневниковых записей в рамках изучения русского языка как иностранного.

There are about 355 thousand foreign students studying in Russia, among whom the medical specialty is particularly popular, ranking first in terms of incoming mobility. In this regard, the teacher faces the task of developing a secondary linguistic personality in a foreign language, for the solution of which it is necessary to create a certain communicative environment and, what is important, to introduce regional and linguocultural information. The relevance of this study is due to the insufficient amount of educational material on the Russian language for foreign students. The purpose of the article is to identify and describe the linguistic and cultural potential of using additional sources of information for medical students and to present a methodological development based on them. The material for creating the worksheets was excerpts from A. A. Vishnevsky’s “Diary of a Surgeon”. The conclusion is made about the potential of diary entries in the context of studying Russian as a foreign language.
Об оценке влияния степени охвата опорным наполнителем сферической керамической оболочки и предварительной прокалки на уровень напряжений в материале формы при заливке и затвердевании в ней отливки
Authors: Ткачева А.В. , Евстигнеева А.А.
Published: December 2024

Рассчитываются температурные напряжения в сферической керамической оболочковой форме в процессе заливки и затвердевания металла. Поставлена и решена соответствующая задача теории температурных напряжений в упругих материалах. Изменяемыми параметрами задачи принимаются степень разогрева (прокалки) оболочковой формы и высота ее посадки в опорный наполнитель (ОН). Зависимостью упругих модулей от температуры пренебрегается. В качестве контактных условий на границе контактирующего металла с внутренней поверхностью формы принимаются равенства напряжений нормальных и касательных к граничной поверхности. ОН принимается не деформируемым, его контакт с материалом оболочковой формы полагается жестким. Отмечается незначительное увеличения уровня напряжений в форме за счет присутствия опорного наполнителя и заметное влияния на него предварительного ее нагрева.
К теории кручения неоднородных призматических стержней, находящихся под действием внешнего давления
Authors: Миронов Б.Г.
Published: December 2024

В работе исследовано предельное состояние стержней из идеального жесткопластического неоднородного материала, находящихся под действием переменного внешнего давления, линейно меняющегося вдоль образующей стержня. Рассмотрены основные соотношения, описывающие предельное состояние неоднородных стержней. Определены характеристики исследуемых соотношений и соотношения вдоль характеристик. Получены интегралы основных соотношений при различных условиях предельного состояния. Рассмотрена задача о предельном состоянии неоднородного призматического стержня с прямоугольным сечением под внешним давлением, с предположением линейной зависимости предела текучести от координат.

The study investigates the ultimate state of rods made of ideally rigid-plastic heterogeneous material under external pressure linearly varying along the rod’s generatrix. The primary relationships describing the ultimate state of heterogeneous rods are considered. Characteristics of the studied relationships and equations along these characteristics are determined. Integrals of the main equations are derived for various conditions of the rod’s ultimate state. The problem of the ultimate state of a heterogeneous prismatic rod with a rectangular crosssection under external pressure is studied, assuming that the yield strength linearly depends on the coordinate of the point.
Çocukluktan Erişkinliğe Kalp Yetersizliği Hastası ve Hemşirelik Bakımı: Olgu Sunumu
Authors: Kalyoncuo Servet , Ceyhan Özlem
Published: December 2024

Kalp yetersizliği (KY) erişkinlerdeki ölüm ve tekrarlı hastaneye yatış oranlarının yüksek olması ile dikkat çeken tanılardan biri olmakta ve dünya nüfusunun artışı ile de giderek global bir epidemi hâline gelmektedir. Ayrıca bireye ve sağlık sistemine yarattığı hastalık yükünün olumsuz ölçüde yansımaları hastalığın bir sağlık önceliği hâline gelmesine neden olmaktadır. Özellikle yaşam boyu tedavi ihtiyacı ve tedavinin etkin yönetilememesi, buna bağlı daha sık hastaneye yatış gereksinimi, karmaşık ve pahalı cihaz tedavi uygulamaları nedeniyle hem bireylere hem de sağlık ekonomisine yüksek maliyetler getirmektedir Kalp yetersizliğinde hemşirelik bakımının temel amacı; yaşam kalitesini yükselterek hastaların günlük yaşam aktivitelerini olabilecek en üst seviyede bağımsız şekilde yerine getirmelerini sağlamak, hastalık semptomlarını azaltarak ilaç ihtiyacını en aza indirmek, tekrar eden hastane yatışlarını önlemek, hastalığa özgü diyete uyumu sağlamak, deri bütünlüğünü sürdürmek, kardiyopulmoner fonksiyonları iyileştirmek, bireyin fonsiyonel kapasitesini arttırmaktır. 29 yaşında kadın hasta yürürken zorlanma, yokuş çıkamama, karında asit birikimi şikayetleri ile hastaneye başvurmuş mitral kapak yetmezliği tanısı ile kabul edilmiştir. Olgu Marjory Gordon’un Fonksiyonel Sağlık Örüntüleri Hemşirelik Bakım Modeli ile değerlendirilerek, hemşirelik bakımı verilmiştir.
Aktualisasi Nilai-Nilai Dasar Tujuan Negara sebagai Panduan Politik Hukum dalam Opsi Kotak Kosong pada Pemilihan Kepala Daerah Serentak Tahun 2024
Authors: Diding Jalaludin  , Muhammad Ilham Pratama  , Utang Rosidin
Published: December 2024

Dinamika politik menjelang Pemilihan Kepala Daerah (Pilkada) Serentak Tahun 2024 tidak hanya terjadi dalam kalkulasi kesepakatan koalisi antar partai politik yang mengusung Calon Kepala Daerah (Cakada), namun terjadi juga pada proses penetapan regulasi (politik hukum) yang melegitimasi pesta demokrasi tersebut dimulai dari Mahkamah Konstitusi yang pada last minute mengeluarkan Putusan No. 60/PUU-XXII/2024 dan Putusan No. 70/PUU-XXII/2024, rapat Badan Legislasi DPR RI membahas revisi UU Pilkada untuk melawan Putusan MK, serta demonstrasi lapisan masyarakat yang menentang revisi UU Pilkada dan mendukung Putusan MK sebagai landasan yuridis pelaksanaan Pilkada 2024, pembatalan revisi UU Pilkada, serta opsi penambahan kotak kosong pada semua surat suara. Penelitian ini bertujuan untuk menganalisis implementasi nilai-nilai dasar tujuan negara Indonesia sebagai panduan politik hukum dalam keputusan penambahan opsi kotak kosong pada semua surat suara dalam Pemilihan Umum (Pemilu) sehingga akan memberikan gambaran dan penjelasan yang komprehensif mengenai apa saja nilai-nilai dasar tujuan negara Indonesia yang menjadi panduan politik hukum dan bagaimana perspektifnya terhadap politik hukum opsi kotang kosong pada Pilkada. Metode penelitian ini menggunakan metode deskriptif analisis dengan pendekatan penelitian hukum yuridis normatif dan menggunakan jenis data kualitatif berupa data sekunder. Teknik pengumpulan data dilakukan dengan library research atau kepustakaan. Hasil penelitian ini menunjukan bahwa politik hukum dalam opsi penambahan kotak kosong pada semua surat suara telah sesuai dengan nilai-nilai yang terkandung dalam dasar negara terutama asas langsung, umum, bebas, rahasia, jujur, dan adil yang menjadi landasan filosofis penyelenggaraan Pemilu di Indonesia. Akan tetapi bilamana kotak kosong menjadi pemenang secara terus menerus dalam Pilkada maupun Pilkada Ulang, maka akan menambah permasalahan yang berdampak terhadap seluruh aspek yang berkelindan dengan proses Pilkada tersebut. Oleh karena itu, Otoritas Pembentuk UU maupun Mahkamah Konstitusi yang kerap kali memainkan peran positif legislator, memberikan solusi terhadap permasalahan tersebut.
Enhancing YOLOv3 with RNN Models: application to American Sign Language recognition for deaf individuals
Authors: Bouarara Hadj Ahmed , Benyahia Kadda
Published: December 2024

As a natural language, sign language is a rich and expressive form of communication with properties similar to spoken languages. In this paper, we explore the application of transfer learning techniques to develop an intelligent system for recognizing American Sign Language. Instead of building a new deep convolutional neural network from scratch, we leveraged pre-trained models to capitalize on their advantages and reduce experimentation time. Specifically, we focused on YOLOv3 combined with advanced recurrent layers, including LSTM, GRU, and Bidirectional LSTM. The results were highly promising: YOLOv3 + Bidirectional LSTM achieved the highest accuracy, averaging over 94%, followed by YOLOv3 + LSTM at ~93%, and YOLOv3 + GRU at ~91%. These findings highlight the effectiveness of combining YOLOv3 with recurrent architectures for sign language recognition, demonstrating robust precision, recall, and F1 scores across models, with Bidirectional LSTM standing out as the top-performing configuration.
A new shear deformation micro-beam model based on a nonlocal elasticity theory
Authors: Mahi Amale , Hassaine Abdellah , Hamlati Zineb
Published: December 2024

In this article, a nonlocal refined shear deformation beam theory is proposed to analyze the free vibration behavior of FG nanobeams. The formulation is based on the nonlocal differential constitutive equations of Eringen that accounts for small scale effects. Material properties vary continuously through thickness according to a power law distribution. The study is performed within the framework of a new parametric shear deformation theory which provides parabolic transverse shear strains across the thickness direction and hence, does not need shear correction factor. Moreover, zero-traction boundary conditions on the top and bottom surfaces of the nanobeam are satisfied rigorously. Equations of motion of FG nanobeam are derived from both the nonlocal differential constitutive relations of Eringen and Hamilton’s principle. The system of differential equations is solved using the Navier solution technique. The parametric study is conducted to examine the effects of volume fraction index, length scale parameter and length ratio on the free frequencies of vibration of FG thin and thick nanobeams.
Penerapan Strategi Bersaing dengan Pendekatan Five Porter Analysis pada Zonecoffe Temanggung
Authors: Sahi Ahmad , Asye Rachmawaty  , Anna Noviana
Published: December 2024

Coffee consumption has become an attraction and a popular lifestyle within Indonesian society, leading to a growing number of coffee producers and positioning Indonesia as the third-largest coffee producer in the world. This growth has resulted in competition among coffee producers, requiring them to adopt competitive strategies, innovate, and demonstrate creativity to gain consumer acceptance. Zonecoffee Temanggung, which is located on Jl. Raya Parakan, Wonosobo, Kalianggrung, Tlahap, Kledung sub-district, Temanggung district, Central Java, focuses on coffee production and was only established in 2024. An in-depth analysis is therefore needed so that the existence of this coffee producer can continue to grow and develop. Conducting competitive strategy research using the 5 Forter's Force method will be a reference to what the competition for coffee producers will be like in the future and what strategies will be applied in running this business so that it continues to win the hearts of customers. In detail, it will be discussed about the five Forter's Force strategy methods, including the following: analysis of the threat of new entrants to coffee producers, bargaining power of suppliers, bargaining power of buyers, the threat of substitute products, and competition between coffee producers. By conducting this research, a reference to the competitive strategy at Zonecoffee is obtained.
BARBIE. Bayesian Analysis for Remote Biosignature Identification on exoEarths. III. Introducing the KEN
Authors: Latouf Natasha , Himes Michael D. , Mandell Avi M. , Moore Michael Dane , Kofman Vincent , Villanueva Geronimo L. , Stark Chris
Published: December 2024

We deploy a newly generated set of geometric albedo spectral grids to examine the detectability of methane (CH4) in the reflected-light spectrum of an Earth-like exoplanet at visible and near-infrared (NIR) wavelengths with a future exoplanet imaging mission. By quantifying the detectability as a function of signal-to-noise ratio (SNR) and molecular abundance, we can constrain the best methods of detection with the high-contrast space-based coronagraphy slated for the next-generation telescopes such as the Habitable Worlds Observatory. We used 25 bandpasses between 0.8 and 1.5 μm. The abundances range from a modern-Earth level to an Archean-Earth level, driven by abundances found in available literature. We constrain the optimal 20%, 30%, and 40% bandpasses based on the effective SNR of the data, and investigate the impact of spectral confusion between CH4 and H2O on the detectability of each one. We find that a modern-Earth level of CH4 is not detectable, while an Archean-Earth level of CH4 would be detectable at all SNRs and bandpass widths. Crucially, we find that CH4 detectability is inversely correlated with H2O abundance, with the required SNR increasing as H2O abundance increases, while H2O detectability depends on CH4 abundance and the selected observational wavelength, implying that any science requirements for the characterization of Earth-like planet atmospheres in the visible–NIR should consider the abundances of both species in tandem.
Star−Disk Collisions: Implications for Quasi-periodic Eruptions and Other Transients near Supermassive Black Holes
Authors: Yao Philippe Z. , Quataert Eliot , Jiang 姜 Yan-Fei 燕飞 , Lu Wenbin , White Christopher J.
Published: December 2024

We use Athena++ to study the hydrodynamics of repeated star−accretion disk collisions close to supermassive black holes, and we discuss their implications for the origin of quasi-periodic eruptions (QPEs) and other repeating nuclear transients. We quantify the impact of the collisions on the stellar structure, the amount of stripped stellar debris, and the orbital properties of the debris. We provide simple fitting functions for the stellar mass loss per collision; the mass loss is much larger after repeated collisions, due to the dilute stellar atmosphere shock-heated in earlier collisions. The lifetime of the QPE-emitting phase set by stellar mass loss in star−disk collision models for QPEs is thus at most ∼1000 yr; it is shortest for eRO-QPE2, of order a few decades. The mass of the stripped stellar debris per collision and its orbital properties imply that currently observed QPEs are not powered by direct star−disk collisions but rather by collisions between the stellar debris liberated in previous collisions and the accretion disk (“circularization shocks”). We discuss how the hydrodynamics of this interaction can explain the diverse timing properties of QPEs, including the regular timing of GSN 069 and eRO-QPE2 and the large flare-to-flare timing variations observed in eRO-QPE1. QPEs with recurrence times of many days, if observed, may have more regular timing.
Sub-Alfvénic Turbulence: Magnetic-to-kinetic Energy Ratio, Modification of Weak Cascade, and Implications for Magnetic Field Strength Measurements
Authors: Lazarian A. , Ho Ka Wai , Yuen Ka Ho , Vishniac Ethan
Published: December 2024

We study the properties of sub-Alfvénic magnetohydrodynamic (MHD) turbulence, i.e., turbulence with Alfvén mach number M
A = V

L
/V
A < 1, where V

L
is the velocity at the injection scale and V
A is the Alfvén velocity. We demonstrate that MHD turbulence can have different properties, depending on whether it is driven by velocity or magnetic fluctuations. If the turbulence is driven by isotropic bulk forces acting upon the fluid, i.e., is velocity driven, in an incompressible conducting fluid we predict that the kinetic energy is

M
A

−
2

times larger than the energy of magnetic fluctuations. This effect arises from the long parallel wavelength tail of the forcing, which excites modes with k
∥/k
⊥ < M
A. We also predict that as the MHD turbulent cascade reaches the strong regime, the energy of slow modes exceeds the energy of Alfvén modes by a factor

M
A

−
1

. These effects are absent if the turbulence is driven through magnetic fluctuations at the injection scale. We confirm our predictions with numerical simulations. Since the assumption of magnetic and kinetic energy equipartition is at the core of the Davis–Chandrasekhar–Fermi (DCF) approach to measuring magnetic field strength in sub-Alfvénic turbulence, we conclude that the DCF technique is not universally applicable. In particular, we suggest that the dynamical excitation of long azimuthal wavelength modes in the galactic disk may compromise the use of the DCF technique. We discuss alternative expressions that can be used to obtain magnetic field strength from observations and consider ways of distinguishing the cases of velocity and magnetically driven turbulence using observational data.
A Systematic Search for Candidate Supermassive Black Hole Binaries Using Periodic Mid-infrared Light Curves of Active Galactic Nuclei
Authors: Luo Di , Jiang Ning , Liu Xin
Published: December 2024

Periodic variability in active galactic nuclei (AGNs) is a promising method for studying subparsec supermassive black hole binaries (SMBHBs), which are a challenging detection target. While extensive searches have been made in the optical, X-ray, and gamma-ray bands, systematic infrared (IR) studies remain limited. Using data from the Wide-field Infrared Survey Explorer (WISE), which provides unique decade-long mid-IR light curves with a six-month cadence, we have conducted the first systematic search for SMBHB candidates based on IR periodicity. Analyzing a parent sample of 48,932 objects selected from about half a million AGNs, we have identified 28 candidate periodic AGNs with periods ranging from 1268 to 2437 days (in the observer frame), by fitting their WISE light curves with sinusoidal functions. However, our mock simulation of the parent sample indicates that stochastic variability can actually produce a similar number of periodic sources, underscoring the difficulty in robustly identifying real periodic signals with WISE light curves, given their current sampling. Notably, we find no overlap between our sample and optical periodic sources, which can be explained by a distinct preference for certain periods due to selection bias. By combining archived data from different surveys, we have identified a candidate exhibiting periodic behavior in both the optical and IR bands, a phenomenon that warrants further validation through observational tests. Our results highlight the potential of IR time-domain surveys, including future missions such as the Nancy Grace Roman Space Telescope, for identifying periodic AGNs, but complementary tests are still needed to determine their physical origins, such as SMBHBs.
Young Stellar Object Jets Magnetocentrifugally Driven by Reconnecting Atmospheric Avalanche Accretion Streams above Inner Circumstellar Disks
Authors: Tu 涂 Yisheng 以晟 , Li Zhi-Yun , Zhu 朱 Zhaohuan 照寰 , Hu 胡 Xiao 晓 , Hsu 徐 Chun-Yen 峻彥
Published: December 2024

Fast, collimated jets are ubiquitous features of young stellar objects. They are generally thought to be powered by disk accretion, but the details are debated. Through 2D (axisymmetric) MHD simulations, we find that a fast (>100 km s−1) collimated bipolar jet is continuously driven along the north and south poles of a circumstellar disk that is initially magnetized by a large-scale open poloidal field and contains a thermally ionized inner magnetically active zone surrounded by a dead zone. The fast jet is primarily driven magnetocentrifugally by the release of the gravitational binding energy of the so-called “avalanche accretion streams” near the boundary of an evacuated poloidal field dominated polar region and a thick disk atmosphere raised by a toroidal magnetic field. Specifically, the fast outflow is driven along the upper (open) branch of the highly pinched poloidal field lines threading the (strongly magnetically braked) accretion streams, where the density is relatively low so that the lightly loaded material can be accelerated magnetocentrifugally along the open field line to a high speed. The highly pinched poloidal magnetic fields threading the avalanche accretion streams tend to reconnect, enabling mass to accrete to the center without dragging along the poloidal magnetic flux with it. The reconnection provides a potential heating source for producing chondrules and calcium- and aluminum-rich inclusions.
Low Injection Rate of Cosmic-Ray Protons in the Turbulent Reacceleration Model of Radio Halos in Galaxy Clusters
Authors: Nishiwaki Kosuke , Asano Katsuaki
Published: December 2024

A giant radio halo (RH) is a diffuse synchrotron emission observed on the scale of megaparsecs, typically found in the central region of merging galaxy clusters. Its large size and steep spectrum suggest that it originates from the reenergization of an aged population of cosmic-ray electrons (CREs), while the secondary leptons produced in the pp hadronic collision of cosmic-ray protons (CRPs) may contribute to the emission. In this study, we investigate the reacceleration model including both primary and secondary CREs, assuming that the primary cosmic rays (CRs) originate from internal galaxies. In our new method, we follow the cosmological evolution of each cluster and calculate the energy spectra and 1D spatial distributions of CRs. The primary CRE model with a ∼3 Gyr duration of reacceleration successfully reproduces the statistical properties of the RHs observed in the recent LOFAR survey, as well as the spectrum and profile of the Coma cluster. The gamma-ray and neutrino emissions produced by reaccelerated CRPs are consistent with the upper limits. However, if the CRP injection rate is high and the secondary CREs become significant, the model with the required ∼3 Gyr reacceleration overproduces the number of RHs. The limit on the CRP injection rate, L

p
≲ 1041 erg s−1, is significantly lower than that expected from the early starburst activity or jets from active galactic nuclei. This discrepancy requires a revision of either the model of CR supply from galaxies or the turbulent reacceleration model.
Mapping the Dense Molecular Gas toward 13 Supernova Remnants
Authors: Tu 涂 Tian-Yu 天宇 , Chen 陈 Yang 阳 , Liu 刘 Qian-Cheng 前程
Published: December 2024

Supernova remnants (SNRs) can exert strong influence on molecular clouds (MCs) through interaction by shock wave and cosmic rays. In this paper, we present our mapping observation of HCO+ and

HCN

1–0 lines toward 13 SNRs interacting with MCs, together with archival data of CO isotopes. Strong HCO+ emission is found in the fields of view of SNRs W30, G9.7−0.0, Kes 69, 3C 391, 3C 396, W51C, HC 40, and CTB109 in the local-standard-of-rest velocity intervals in which they are suggested to show evidence of SNR–MC interaction. We find an incomplete 12CO shell surrounding G9.7−0.0 with an expanding motion. This shell may be driven by the stellar wind of the SNR progenitor. We also find an arc of 12CO gas spatially coincident with the northwestern radio shell of Kes 69. As for the HCO+ line emission, SNRs 3C 391 and W51C exhibit significant line profile broadening indicative of shock perturbation, and CTB109 exhibits a possible blueshifted line wing brought by shock interaction. We do not find significant variation of the

I
(

HCO
+

)
/
I
(
HCN
)

line ratio between broad-line and narrow-line regions, among different SNRs, and between MCs associated with SNRs and typical Galactic MCs. Therefore, we caution on using the

I
(

HCO
+

)
/
I
(
HCN
)

line ratio as a diagnostic of SNR feedback and cosmic-ray (CR) ionization. We also estimate the N(HCO+)/N(CO) abundance ratio in 11 regions toward the observed SNRs, but they show little difference from the typical values in quiescent MCs, possibly because N(HCO+)/N(CO) is not an effective tracer of CR ionization.
Pulse-profile Modeling and Spin–Orbit Alignment in a Suzaku Sample of Accreting X-Ray Binary Pulsars
Authors: Laycock Silas G. T. , Cappallo Rigel C. , Pradhan Pragati , Christodoulou Dimitris M. , Paul Biswajit
Published: December 2024

We report pulse-profile modeling of a sample of 23 X-ray binary pulsars observed with the Suzaku X-ray satellite. These pulsars have spin periods ranging from 0.7 to 9400 s, and their X-ray emission is powered by the accretion from their stellar companions. We fitted each individual pulse profile with the Polestar geometric model, which accounts for X-ray emission from two hot spots modeled as a simple combination of fan+pencil beam components, including an approximation for gravitational light bending. In 14 of 21 cases, our measurements of the inclinations of the pulsar spin axes broadly agree with the corresponding inclinations of the orbital planes of the binary systems determined by various other means, a striking outcome with a mere 6 × 10−7 probability of occurring by chance. The implications of our study are as follows: (a) apparently, accretion torques have had time to erase spin–orbit misalignment caused by supernova kicks in two-thirds of the systems; (b) many X-ray binary pulsars have dominant dipolar surface magnetic fields, in contrast to the recently reported exotic configurations in millisecond pulsars; and (c) if the binary inclinations can be determined by pulse-profile modeling, even for a subset of the ∼200 known X-ray binary pulsars, most of which orbital inclinations are as yet poorly constrained, it raises the prospect of tightening dramatically ongoing neutron-star mass determinations. This is because masses in binary systems overwhelmingly come from an orbital-mechanics formulation (Kepler’s third law), in which the dominant source of uncertainty is the inclination of the orbital plane.
LMC Calls, Milky Way Halo Answers: Disentangling the Effects of the MW–LMC Interaction on Stellar Stream Populations
Authors: Brooks Richard A. N. , Garavito-Camargo Nicolás , Johnston Kathryn V. , Price-Whelan Adrian M. , Sanders Jason L. , Lilleengen Sophia
Published: December 2024

The infall of the LMC into the Milky Way (MW) has dynamical implications throughout the MW’s dark matter halo. We study the impact of this merger on the statistical properties of populations of simulated stellar streams. Specifically, we investigate the radial and on-sky angular dependence of stream perturbations caused by the direct effect of stream–LMC interactions and/or the response of the MW dark matter halo. We use a time-evolving MW–LMC simulation described by basis function expansions to simulate streams. We quantify the degree of perturbation using a set of stream property statistics including the misalignment of proper motions with the stream track. In the outer halo, direct stream–LMC interactions produce a statistically significant effect, boosting the fraction of misaligned proper motions by ∼25% relative to the model with no LMC. Moreover, there is on-sky angular dependence of stream perturbations: the highest fractions of perturbed streams coincide with the same on-sky quadrant as the present-day LMC location. In the inner halo, the MW halo dipole response primarily drives stream perturbations, but it remains uncertain whether this is a detectable signature distinct from the LMC’s influence. For the fiducial MW–LMC model, we find agreement between the predicted fraction of streams with significantly misaligned proper motions,

ϑ

¯

>
10
°

, and Dark Energy Survey data. Finally, we predict this fraction for the Rubin Observatory Legacy Survey of Space and Time (LSST) footprint. Using LSST data will improve our constraints on dark matter models and LMC properties, as it is sensitive to both.
Analysis of Gamma-Ray Burst Closure Relationship in Multiple Wavelengths
Authors: Dainotti M. G. , Bhardwaj S. , Bissaldi E. , Fraija N. , Sourav S. , Galvan-Gamez A.
Published: December 2024

Gamma-ray bursts (GRBs) are intense pulses of high-energy emission associated with the death of massive stars or compact objects’ coalescence. Their multiwavelength observations help verify the reliability of the standard fireball model. We analyze 14 GRBs observed contemporaneously in gamma rays by the Fermi Large Area Telescope, in X-rays by the Swift Telescope, and in the optical bands by Swift and many ground-based telescopes. We study the correlation between the spectral and temporal indices using closure relations according to the synchrotron forward-shock model in a stratified medium (n ∝ r
−k
) with k ranging from 0 to 2.5. We find that the model without energy injection is preferred over the one with energy injection in all the investigated wavelengths. In gamma rays, we only explored the ν > max{ν

c
, ν

m
} (slow cooling, SC/fast cooling, FC) cooling condition (where ν

c
and ν

m
are the cooling and characteristic frequencies, namely the frequencies at the spectral break). In the X-ray and optical bands, we explored all the cooling conditions, including ν

m
< ν < ν

c
(SC), ν

c
< ν < ν

m
(FC), and SC/FC, and found a clear preference for SC for X-rays and SC/FC for optical. Within these cooling conditions, X-rays exhibit the highest rate of occurrence for the density profile with k = 0, while the optical band has the highest occurrence for k = 2.5 when considering no energy injection. Although we can pinpoint a definite environment for some GRBs, we find degeneracies in other GRBs.