bluuebunny/crossref_metadata_2025 huggingface dataset:
Congenital tongue base cyst as uncommon cause of laryngeal stridor in an infant
Authors: Bajic Dejana , Komazec Zoran
Published: July 2024

Introduction. Congenital tongue base cysts are uncommon in everyday clinical
practice and they could be asymptomatic or cause stridor, respiratory
distress and asphyxia. We are presenting a case of two-month-old infant with
the symptoms of stridor and the acute respiratory insufficiency caused by
congenital tongue base cyst. Case outline. A two-month-old apyretic male
infant was admitted to hospital with the symptoms of severe dyspnea,
nonproductive cough and stridor. Due to severe respiratory insufficiency the
infant was on mechanical ventilation. Computed tomography scans of thorax
and neck was performed along with the application of the intravenous
contrast where a cystic formation was shown. The depicted formation narrowed
the lumen of oropharynx which is the same as the size of valleculas (3 mm).
The formations pressed both valleculas, more significantly the left one. The
same day the marsupialization of the cyst was done and the material was sent
to the pathohistological analysis (the report of the pathologist indicates
the cyst of the thyroid channel). Conclusion. Clinical manifestations of
cyst depend on the level of obstruction and can be presented as inspiratory
stridor, apnea, cyanosis, chronic coughing and feeding difficulty. The
flexible nasopharyngeal laryngoscopy or bronchoscopy, CT and MR imaging help
consider the differential diagnosis. The symptoms of stridor were removed
completely after applied marsupialization of the cyst.
Prediction of interface width in overlap joint configuration for laser welding of aluminum alloy using sensors
Authors: Lee Yoo-Eun , Choo Woo-In , Im Sungbin , Lee Seung Hwan , Kam Dong Hyuck
Published: July 2024

We present a method that can predict the interface width in an overlapping joint configuration for laser welding of Al alloys using sensors and a convolutional neural network (CNN)-based deep-learning model. The inputs for multi-input CNN-based deep-learning prediction models are spectral signals, represented by the light intensity measured by a spectrometer and dynamic images of the molten pool filmed by a charge-coupled device (CCD) camera. The interface width, used as learning data for modeling, was constructed as a database along with the process signal by cross-sectional analysis. In this study, we present results showing high accuracy in predicting the interface width in the overlap joint configuration for Al alloy laser welding. For predicting the interface width, five models are created and compared: a single CCD and spectrometer sensor algorithm, a multi-sensor algorithm with two input variables (CCD, spectrometer), a multi-sensor algorithm excluding the processing beam in the spectrometer data on the combination of Al 6014-T4 (top)/Al 6014-T4 (bottom), and a multi-sensor algorithm applied to the combination of Al 6014-T4 (top)/Al 5052-H32 (bottom). The multi-sensor algorithm with two input variables (CCD and spectrometer) on the same material combination showed the highest accuracy among the models.
Microstructure and dynamic fracture behaviors of laser-MAG hybrid welded T-joints of 945 shipbuilding steel with different heat inputs
Authors: Guo Jilong , Zhou Lilong , Zhao Yong , Wang Feiyun , Fu Juan , Yang Xueyan , Liu Yinjun
Published: July 2024

Welded T-joints of 945 shipbuilding steel are widely used in plate-beam connections, and their impact toughness directly affects the service life of shipboard structural components. However, current research efforts have primarily focused on the static mechanical properties of welded T-joints, with few scholars investigating the impact properties of welded T-joints under dynamic loading conditions. In this paper, laser-MAG hybrid welding of 945 shipbuilding steel T-joints is utilized to study the effects of heat input on the microstructure evolution and dynamic mechanical properties of welded T-joints. The results show that the increase in heat input results in a decrease in the cooling rate, which promotes the formation of lath martensite in weld metal and the formation of granular and lath bainite in coarse grain heat affected zone (HAZ). Concurrently, the higher heat input increases the width of the HAZ and leads to grain coarsening, resulting in a 298.9% increase in average grain area when the heat input rises from 12.1 to 14.6 kJ/cm. The changes in martensite content and morphology result in a reduction in the microhardness of welded T-joints. The HAZ becomes the most vulnerable region to dynamic impact loading, and the higher heat input leads to ductile fracture. Compared to high heat input, the drop hammer acceleration decreases by 34.0%, the maximum displacement increases by 45.9%, and the fracture energy increases by 43.1%, for low heat input. The changes in the drop hammer impact metrics further illustrate that welded T-joints with lower heat input are favorable for improving impact toughness.
Evaluación de la Sostenibilidad de los Sistemas de Producción de la Parroquia Puéllaro en el Centro-Norte de Pichincha
Authors: Moret Vinicio Nicolalde ,   Instituto Superior Tecnológico Quito Metropolitano
Published: July 2024

El Sector agropecuario es fundamental en la economía local de las parroquias rurales, tal es el caso de la región centro norte de la provincia de Pichincha, en la parroquia Puéllaro la realidad técnica, socio económica y ambiental del sector agrícola es incierta y para poder desarrollar proyectos agropecuarios en beneficio de su población es imprescindible conocer la situación actual mediante un diagnóstico agrario y la respectiva evaluación de los sistemas de producción predominantes en la zona. El objetivo del presente artículo se centra en evaluar los sistemas de producción de la parroquia Puéllaro mediante un diagnóstico agrario y análisis de rentabilidad para diseñar indicadores de sostenibilidad. La metodología contempla tres fases: (I) el análisis de la micro-región (sistema agrario), (II) caracterización de los productores agropecuarios (sistemas de producción), y (III) validación del análisis, debate con los productores y formulación de propuestas. Los resultados muestran que existen cinco tipologías de productores A) Fruticultores con cultivos de ciclo corto con acceso al riego, B) Fruticultores con crianza de animales menores con acceso al riego, C) Fruticultores con crianza de animales menores sin acceso al riego, D) Fruticultores con cultivos de ciclo corto y crianza de animales mayores sin acceso al riego, y E) Agricultores maiceros con crianza de animales mayores sin acceso al riego. De ellos únicamente los tipos A y E obtienen Ingresos agropecuarios altos y suficientes para reproducir su sistema de producción, los demás corren riesgo en su permanencia debido a que los hijos de los agricultores han abandonado la finca, han migrado hacia la ciudad escaseando la mano de obra familiar y además dependen de otros ingresos no agropecuarios para su supervivencia.
Latin American Visual Studies: A Genealogical Picture
Authors: Yepes Muñoz Rubén
Published: July 2024

The last fifteen years have witnessed the emergence of Latin American visual studies. In this essay, we create a genealogical picture of the field and demonstrate that, by drawing from Latin American cultural studies and cultural criticism and through its focus on the region’s social and political issues, it has developed a specificity of its own. First, we briefly examine the contributions made by Latin American art history, social sciences, and communication to the discourse of Latin American visual studies. Second, we address the relationship between visual and cultural studies, arguing that the latter is the main epistemic field from which the former has emerged. In the third and main section, we detail key directions, themes, and projects currently being developed. We conclude by underscoring several aspects of Latin American visual studies’ epistemic and intellectual specificity, with a final reflection on the field’s potential evolution as it consolidates within academia.
Los últimos quince años han atestiguado el surgimiento de los estudios visuales latinoamericanos. En este ensayo, creamos un cuadro genealógico del campo y demostramos que, a partir de los estudios culturales y la crítica cultural latinoamericanos y a través de su enfoque en los problemas sociales y políticos de la región, los estudios visuales han desarrollado una especificidad propia. Primero, examinamos brevemente los aportes de la historia del arte, las ciencias sociales y la comunicación latinoamericanas al discurso de los estudios visuales latinoamericanos. A continuación, abordamos la relación entre los estudios visuales y culturales, argumentando que este último es el principal campo epistémico del que ha surgido el primero. En la tercera y principal sección, detallamos las principales direcciones, temas y proyectos que se están desarrollando actualmente. Concluimos subrayando varios aspectos de la especificidad epistémica e intelectual de los estudios visuales latinoamericanos, con una reflexión final sobre la evolución potencial del campo a medida que se consolide dentro de la academia.
Introduction to the MARLAS Special Section on AI / Introducción a la sección especial de MARLAS sobre la IA / Introdução à Seção Especial do MARLAS sobre IA 
Authors: McInnis Dominguez Meghan
Published: July 2024

Introduction to special section on Artificial Intelligence / Introducción a sección especial sobre la IA / Introdução à seção especial sobre Inteligência Artificial
IFAB – Laws of the Game 2024/25 - Additional permanent concussion substitutions protocol: summary and comment
Authors: Ribeiro Basil ,   Revista de Medicina Desportiva informa, Moreira André ,   Liga Portugal
Published: July 2024

… O IFAB aprovou várias alterações às Leis do jogo durante a 138ª Assembleia- Geral Anual, organizada pela Associação Escocesa de Futebol, em Loch Lomond, Escócia, no dia 2 de março de 2024. Muito importante para a proteção do jogador foi a alteração à Lei 3.2 (número de substituições), a qual vem permitir a utilização de uma substituição permanente adicional em caso de concussão cerebral, ocorrida durante o jogo ou durante o intervalo. Doravante, o jogador com concussão cerebral, diagnosticada ou suspeitada, pode ser substituído de forma permanente, isto é, não pode voltar mais ao jogo e, se possível, deve ser acompanhado ao balneário e/ou a centro médico. Esta substituição por concussão (SpC) não conta para o número total de substituições, referidas como normais, e habitualmente em número de cinco, assim como para o número de oportunidades para fazer as substituições, habitualmente em número de três, nos casos em que for aplicado…
Homenagem - Dr. Thomas L DeLorme
Authors: Ribeiro Basil ,   Revista de Medicina Desportiva informa
Published: July 2024

O Dr. Thomas L DeLorme (figura 1) nasceu em 1917 e foi uma das vítimas da enorme pandemia de febre reumática que ocorreu nos EUA nas décadas de 30 e 40, a qual causou mortalidade elevada… Contra a terapêutica tradicional, os dois (com o sargento Thaddeus Kawalek) decidiram iniciar a reabilitação com pesos para a melhoria da força muscular da debilitada coxa: extensões do joelho com a bota de aço (figura 3), fixada no pé e no tornozelo, na qual se podiam colocar com segurança pesos adicionais e ir aumentando a resistência do exercício... O protocolo de DeLorme consistia em múltiplas séries de exercícios de resistência, nas quais os pacientes levantavam o peso máximo para 10 repetições. Mais tarde, em 1948, ele redefiniu o protocolo para incluir três séries de 10 repetições progressivamente mais pesadas, um regime treino de resistência pesado, atualmente conhecido por programa de exercício de resistência progressiva… Morreu em 2003 e, de acordo com o Colégio Americano de Medicina Desportiva, “ele pode ser considerado o pai do treino de resistência moderna na perspetiva do seu estudo em medicina e ciência...
Corpos femininos e masculinos da Idade Média
Authors: Silva Samara Araújo da , Xypas Rosiane
Published: July 2024

Os estudos da literatura francesa é imprescindível para uma ampla formação de professores. Mas os da língua também. Entendendo os adjetivos qualificadores vistos como a expressão da qualidade da realidade designada pelo substantivo, pergunta-se qual a função de adjetivos qualificadores relacionada à temática da representação dos corpos femininos e masculinos da Idade Média? O objetivo deste estudo foi aprofundar o emprego e o contexto da palavra corpo em doze lais literários. Resultados apontam que os adjetivos são modificadores de epíteto, caracterizando, especificando ou modulando o semantismo do substantivo estudado, e que o corpo feminino era valorizado em detrimento ao masculino.
Evidências do envelhecimento populacional e implicações fiscais no Brasil
Authors: Lima Diana Vaz de , Santos Beatriz Almeida dos , Wilbert Marcelo Driemeyer , Silva Matheus Assis Ribeiro da , Garcia Kerolyn Ramos
Published: July 2024

Analisou-se as implicações fiscais do envelhecimento nas contas do governo brasileiro, a partir dos dados da Pesquisa Nacional por Amostra de Domicílio (PNAD) gerada pelo Instituto Brasileiro de Geografia e Estatística (IBGE) entre os anos de 2010 e 2020. Foram considerados dados sobre a projeção da população até 2060 por grupos etários, a projeção da fecundidade até 2060 por grupos etários e por região, a quantidade de nascidos vivos entre 2017 e 2021, o dispêndio com o Benefício de Prestação Continuada (BPC) entre 2010 e 2022 e a quantidade de pessoas idosas por faixa etária com planos de saúde privados entre 2002 e 2022. Os dados do estudo indicam o aumento da população em faixas etárias mais elevadas, a redução da fecundidade em todas as faixas etárias e regiões, o crescimento do dispêndio com os benefícios assistenciais do BPC e o aumento de pessoas idosas com planos de saúde.
O ambiente socioeconômico influencia o uso de crédito consignado?
Authors: Gomes Rejane da Silva , Oliveira Elis Regina de , Santos Geovane Camilo dos , Gonçalves Roberto Ribeiro
Published: July 2024

No Brasil, o crédito consignado é utilizado pelos aposentados e pensionistas como mecanismo de captação de recursos financeiros, em decorrência da taxa de juro menor, sendo que em período de crises econômicas a quantidade de contratos e volume de recursos pode sofrer alterações. Este artigo objetiva analisar a relação entre o endividamento dos aposentados e pensionistas com os indicadores socioeconômicos (2014-2021). Foi aplicado painel com efeitos fixos, com amostra de 64 observações. As proxies de endividamento foram: a quantidade de contratos e o valor do crédito consignado (empréstimo e cartão de crédito). Como indicadores socioeconômicos utilizaram-se: inflação, taxa de juros sobre o crédito consignado, taxa de desocupação, Produto Interno Bruto (PIB), renda média e pandemia. Os indicadores socioeconômicos (IPCA, PIB e Pandemia) influenciaram significativamente a quantidade de contratos e os valores de empréstimos e de cartão de crédito consignado. Este estudo contribui com a literatura sobre a influência de indicadores socioeconômicos no crédito consignado e por evidenciar maior endividamento no período de pandemia.
SISTEM DISTRIBUSI SEDERHANA PENJUALAN KOPI LAMPUNG MENGGUNAKAN ALJABAR MAX-PLUS
Authors: Sholehurrohman Ridho , Sabda Ilman Igit , Hermanto Bambang , Muhaqiqin
Published: July 2024

Distribusi penjualan kopi Lampung dapat dimodelkan dengan menggunakan aljabar max-plus. Dalam memodelkan antrian distribusi penjualan kopi, digunakan software Petri Net untuk menggambarkan antrian distribusi kopi tersebut. Metode aljabar max-plus dapat memperoleh suatu model sistem antrian yang terserver ditoko. Penelitian ini memanfaatkan model tersebut untuk menghitung suatu antrian distribusi penjualan kopi Lampung dengan waktu tunggu secara periodik berdasarkan nilai eigen dan vektor eigennya. Hasil dan analisis pada penelitian menunjukkan bahwa sistem distribusi menggunakan aljabar max-plus sangat efektif dibanding dengan metode manual atau metode konvensional mandiri
RANCANG BANGUN SISTEM KENDALI ROBOT LENGAN 6 DERAJAT KEBEBASAN BERBASIS INTENET OF THINGS
Authors: Firmansya Eliyana , Rangkuti Syahban , Fitriyadi Andri
Published: July 2024

Abstract — Robotics technology has developed very rapidly at this time. Various advanced technologies have replaced manual equipment that requires a lot of human power to operate, one of which is using robots. In this research, a robot arm control system with 6 degrees of freedom will be designed. There are many applications or applications of this robotic arm in the industrial world, including moving goods to places that are dangerous or cannot be entered by humans. The 6 degrees of freedom robot arm uses two servo motor units and 4 DC motor units as its driving force, where all the motors used can move individually or simultaneously. In order to be able to move the robot arm according to the commands given, various electronic devices are needed, including a DC motor drive module type L298N motor driver, an Arduino Mega 2560 microcontroller module to move the motor the commands received, and an ESP8266 NodeMCU which functions as data communication using technology internet of things. This robot arm can be controlled using a smartphone or computer via an application that has been built into it. The data communication that will be used to apply internet of things technology to the robot arm control system is the MQTT protocol. By using the MQTT protocol, control systems can be developed easily using a web server application.
Rancang Bangun Aplikasi Indeks Kepuasan Pasien RS Qadr dengan Integrasi Survei Online Berbasis Website
Authors: Syahira Azahra Syahiradania , Muhamad Bahrul Ulum
Published: July 2024

Rumah sakit merupakan tempat pelayanan kesehatan yang memberikan pelayanan bagi seseorang yang membutuhkan perawatan secara intensif. Oleh karena itu setiap rumah sakit memiliki SOP untuk memberikan pelayanan terbaiknya kepada pasien, jika pasien tidak puas terhadap pelayanan yang diberikan maka akan menimbulkan keluhan. Kepuasan pasien akan meningkatkan citra pelayanan yang membuat rumah sakit tersebut dijadikan pilihan utama ketika pasien membutuhkan perawatan medis. Dalam penilaian puas atau tidaknya pasien terhadap pelayanan yang diberikan, pihak rumah sakit Qadr menyediakan penilaian kepuasan pasien dalam bentuk Google form akan tetapi seiring dengan perkembangan teknologi pihak rumah sakit menginginkan platform digital dengan desain yang menarik serta dapat mengatasi kesulitan dalam mengelola laporan kepuasan pasien terutama dalam hal perhitungan penilaian laporan kepuasan pasien serta laporan keluhan pasien. Oleh karena itu dibutuhkan solusi berupa aplikasi website yang saat ini berkembang pesat di gunakan di lingkungan perusahaan sebagai komunikasi antara pihak rumah sakit dengan pengguna pelayanan. Dalam penelitian akan merancang sebuah aplikasi berbasis website yang dapat membantu pihak rumah sakit dalam mengelola laporan kepuasan dan keluhan pasien. Pada perancangan aplikasi website, penulis menggunakan metode Rapid Application Development (RAD). Hasil yang diharapkan adalah aplikasi indeks kepuasan pasien yang sesuai dengan kebutuhan.
Importance of an unclear fascial layer, stylopharyngeal fascia: an anatomical study
Authors: Samaraz Olgun Pelin , Balcı Aybegüm , Açar Halil İbrahim
Published: July 2024

Objectives: The stylopharyngeal fascia is an important anatomical structure; however, its exact location and relationship with other neighboring structures have not been clearly demonstrated. Therefore, our aim was to reveal the stylopharyngeal fascia to demonstrate its course and neurovascular relationship in the parapharyngeal space. Methods: Ten fresh frozen cadaveric necks were dissected through a transparotideal and transcervical approach extending to the parapharyngeal region. All the neurovascular structures and muscles were preserved to demonstrate the stylopharyngeal fascia. Results: The stylopharyngeal fascia was mostly found on the lateral aspect of the internal carotid artery and could be found by advancing into the plane between the posterior belly of the digastric and stylohyoid muscles at the parapharyngeal space borders. The stylopharyngeal fascia covered not only the parapharyngeal segment of the internal carotid artery but also the cranial nerves X–XII at the parapharyngeal space. The cranial nerve IX coursed laterally to this fascial structure, posterior to the stylopharyngeus muscle in the parapharyngeal space. Conclusion: Although the stylopharyngeal fascia was previously shown to be related to other neurovascular structures, its anatomical course and histology remain unclear. Moreover, the stylopharyngeal fascia was defined using different nomenclatures in different studies. In this study, the stylopharyngeal fascia was shown to be an important anatomical landmark for dissection at the border of the parapharyngeal space. Further studies investigating its histological structure and defining its proper nomenclature are required. Therefore, we propose the term “parapharyngeal fascia”.
Resource Management for Heterogeneous IoT Services In 5g/6g Wireless Network
Authors:   Atomic Energy Commission of Syria (AECS), Mohamad Abdallah Bassam , Mohammed Ameen Saeed Sadeq ,   University of Garmian, Anwar Assaad Mohammad ,   Cihan University-Erbil
Published: July 2024

It is anticipated that the 6G (6th generation) mobile system of communication will be able to satisfy the various service requirements of contemporary communication situations. Due to their promise as a unique framework for adaptive networks, heterogeneous networks of networks (HetNets) have drawn a lot of attention lately. HetNets offer improved quality of service (QoS) and more possibility for spatial frequency reuse when compared with homogenous networks. To avoid interference and achieve a shared spectrum due to mutual disruption, appropriate management of resources (RM) solutions are necessary. The resource administration of 6G HetNets is thoroughly reviewed in this work. To help researchers in this field develop more useful tools, the study intends to provide essential background information on HetNets. First, a thorough analysis of contemporary research in the management of resource areas such as power distribution, user organization, mode choice, and spectrum distribution is provided. Second, we list the most pressing problems with the present resource management strategies and provide workable solutions. Lastly, many unresolved problems and newly discovered study areas are mentioned.
PHASE EQUILIBRIA IN THE Ag7PS6 – Ag8SiS6 SYSTEM
Authors: Pogodin A.I. , Filep M.J. , Zhukova Yu.P. , Malakhovska T.O. , Rosokha I.V. , Kokhan O.P.
Published: July 2024

Ternary silver (I) chalcogenides with an argyrodite structure are of considerable scientific and practical interest as promising thermoelectric, optical, and superionic materials. The functional parameters of these phases are determined by the motif of the crystal structure: tetrahedral close packing and a large number of voids that can be occupied by mobile cations. The result is a significant electrical conductivity and low phonon thermal conductivity. However, the constant growth of requirements for the parameters of functional materials leads to their continuous improvement by increasing their component composition. The alloys of the Ag7PS6 - Ag8SiS6 system were obtained by melting ternary sulfides in vacuumed quartz ampoules in appropriate stoichiometric ratios. The maximum synthesis temperature was 1015°C. All the obtained polycrystalline alloys of the Ag7PS6 - Ag8SiS6 system were studied by DTA and XRD methods. Based on the results of the study of the alloys of the Ag7PS6 - Ag8SiS6 system, a corresponding phase diagram was built and it was found that the Ag7PS6 - Ag8SiS6 system is quasi-binary. It was found that high-temperature modifications of Ag7PS6 and Ag8SiS6 compounds crystallizing in the face-centered cubic SG F-43m form a continuous series of solid solutions. At a lower temperature, the region of the solid solutions region narrows. The areas of two-phase equilibrium between the high and low temperature modifications are realized separately and independently for each of the initial components. At the annealing temperature, the region of boundary solid solutions based on HT-Ag7PS6 does not exceed 25 mol%, and HT-Ag8SiS6 45 mol%.
TEMPERAMENTAL BEHAVIOUR OF THE OPTICAL ABSORPTION EDGE Of Ag8GeS6 SINGLE CRYSTAL
Authors: Malakhovska T.O. , Pogodin A.I. , Filep M.J. , Pop M.M. , Shender I.O. , Zapototskyi M.A. , Kokhan O.P.
Published: July 2024

The optical transmission spectra of single-crystal ternary sulfide Ag8GeS6 were measured in the temperature range 77-300 K on pre-prepared samples (plane-parallel with a polished surface to optical quality). The spectral dependences of lnα at all studied temperatures have an exponential shape near the absorption edge, which indicates that they obey the Urbach's rule. By extrapolating the spectral dependences of lnα, the presence of one point of convergence was established and its coordinates were determined: a0 = 5.25 × 107 cm-1 and E0 = 1.88 eV. The presence of a single point of convergence indicates the absence of phase transitions in the studied temperature range. The steepness parameter σ of the optical absorption edge in the studied temperature range was determined from the exponential sections of the spectral dependences of lnα. As a result, the effect of temperature on the electron-phonon interaction (EPI) is analyzed. The determined values of the optical pseudo-gap of the single crystal of ternary sulfide Ag8GeS6 Eg* = 1.466 eV and the Urbach energy EU = 21.90 meV suggest that the single crystal sample of silver thiogermanate Ag8GeS6 can be used as a promising material for collecting sunlight.
STUDY OF ELECTRONIC STRUCTURE OF Ag2Se, Sb2Se3, AgSbP2Se6
Authors: Sabov V.I. , Pogodin A.I. , Sabov M.Yu. , Barchii I.E. , Studenyak Y.I. , Havryltso G.Yu. , Stercho A.A.
Published: July 2024

The crystal structure of the AgSbP2Se6 compound was studied by X-ray powder method. Crystal chemical structural calculations using the EXPO–CCP14 software complex showed that the AgSbP2Se6 compound crystallizes in trigonal syngoni, SG R-3, unit cell parameters a = 6.61573 Å, c = 39.86223 Å, V=1510.94 Å3, Z=6.
A crystal-chemical analysis of the structures of complex selenides Ag2Se, Sb2Se3, AgSbP2Se6 was carried out. Ag2Se compound (low-temperature modification) crystallizes in orthorhombic syngonia (P212121). Ag+ cations are bound in a 3-coordinate geometry with three equivalent Se2– atoms. Se2– anions coordinate six Ag+ around themselves. Sb2Se3 crystallizes in orthorhombic syngonia (Pnma) with a weakly expressed layered 2D-structure. Sb3+ cations are in two non-equivalent positions: in the first they form deformed [SbSe6] octahedra, in the second [SbSe5] square pyramids. The crystal structure of the compound AgSbP2Se6 (R-3) is characterized by the formation of layers from the anionic group of atoms [P2Se6]4–. In the space between the anionic groups, cations Ag+, Sb3+, which are in octahedral coordination with Se2–, are placed alternately. Sb3+ cations are located on the same plane as the P–P bond centers of [P2Se6]4– anionic groups, Ag+ cations are slightly displaced relative to this plane.
The study of the optical absorption spectra of AgSbP2Se6 single crystal showed that it is characterized by a direct-band allowed type of conductivity, the band gap is Eg=1.49 eV (Tautz method based on (αhν)2=f(hν) Eg=1.48 eV). Ab initio quantum-chemical calculations of the electronic structure using the Quantum Espresso (QE) software package based on density functional theory (DFT) showed that the complex selenides Ag2Se, Sb2Se3, AgSbP2Se6 are characterized by a direct band type of conductivity, the width of the optical band gap Eg = 0.05 eV (Ag2Se ), Eg = 0.87 eV (Sb2Se3), Eg = 1.42 eV (AgSbP2Se6), Fermi energy EFermi=9.75 eV (Ag2Se), EFermi=6.12 eV (Sb2Se3), EFermi=5.34 eV (AgSbP2Se6). The optical band gap (Eg) of Sb2Se3, AgSbP2Se6 compounds are formed by electron transitions Se 4p → Sb 5p, for the Ag2Se compound Se 4p → Ag 5s.
ALKYLATION OF 3-FORMYLQUINOLINE-2-ONE WITH ALKENYL(ALKYNYL) BROMIDES
Authors: Sabo T , Onysko M
Published: July 2024

Functional and condensed quinolin-2-one derivatives exhibit a wide range of biological activity. The presence of an aldehyde group and modification at position 1 or 2 of quinolin-2-one expand the searching for new biologically active compounds. One of the directions of such modification is the annulation of an additional azaheterocycle to quinoline. In this work, the interaction of unsaturated alkyl halides (4-bromobut-1-ene, 5-bromopent-1-ene, 5-bromopent-1-yne) with 3-formylquinolin-2-one was investigated. The reaction was carried out in the presence of dimethylformamide using sodium hydride at room temperature or heating to 80°C for 8 hours. It was shown that under the found conditions, non-regioselective alkylation occurs with the formation of a mixture of O- and N-alkylation isomers. According to spectral data, the ratio of alkylation products depends on the alkylating agent. Thus, in case of using 3-formylquinolin-2-one, 4-bromobut-1-ene or 5-bromopent-1-yne, a mixture of O- and N-alkyl quinolines is formed in a ratio of 1:1.5, and in case of 5-bromopent-1-ene - 2:1. N-butenyl-3-formylquinolin-2-one was isolated by fractional crystallization, and in other cases, mixtures with minor amounts of one of the isomers were isolated.
Peran Guru BK dalam Mengatasi Bullying (Studi Kasus Siswa SMPN 1 Singojuruh)
Authors: Mursidi Agus , Noviandari Harwanti , Denada Tasya
Published: July 2024

Bullying is an emotional problem caused by an imbalance of power between the bully and the victim, where the perpetrator continuously humiliates the victim. The purpose of this study was to find out the role of the counseling teacher in overcoming bullying at SMPN 1 Singojuruh, to find out what factors influence the occurrence of bullying at SMPN 1 Singojuruh and to find out the steps taken by the counseling teacher to deal with bullying at SMPN 1 Singojurih. The method used in this research is a qualitative case study with the subject of research counseling teachers and principals of SMPN 1 Singojuruh. The results of the study show that counseling teachers have a very important role in overcoming bullying in schools by implementing appropriate counseling strategies.
Effektivitas Konseling Teknik Assertive Training dalam Mereduksi Perilaku Konformitas pada Kelompok Teman Sebaya
Authors: Majdi M. Zuhdi Zainul
Published: July 2024

Adolescence is a stage between childhood and maturity. The process of self-adjustment is one type of adaptation. People attempt to be liked and accepted in order to build strong connections, therefore they often change their behavior, one of which is by complying. The goal of the study was to determine how effectively aggressive training strategies reduced peer group conformity. A one-group pretest-posttest design was used in this research. Seven people were the study's subjects. Purposive sampling is the method of sample elimination used. An assessment of conformity behavior was used to collect data. T-test statistics were employed for data analysis. The findings indicated that aggressive teaching strategies had a positive impact on lowering peer group conformity
Characterization of Bioactive Compounds from Aqueous Layer of Guiera senegalensis Leaf Extract
Authors: Bilyamin Adam Ansar , Bashir Ahmad Kabiru , Abdulmumin muhammad Ma'aruf , Bashir AL Amin , Victoria Abdulmalik Isah , Yahaya Abubakar Musa
Published: July 2024

There is need to have cost-effective treatment strategy by using medicinal plant that have therapeutic potentials against varieties of disease due to presence of bioactive compound. The study aimed to characterize the bioactive compounds from the aqueous layer of Guiera senegalensis leaf extracts. Aqueous layer extracts from Guiera senegalensis leaf were prepared and analyzed using FTIR and GCMS. The GCMS result of the plant extract reveals the presence of Carboxylic acid and its derivatives and other compounds such as n-Propyl 11-octadecenoate , Aspidospermidin-17-ol, 1-acetyl-19,21-epoxy-15,16-dimethoxy- . The results of the study have justified therapeutic potential of Guiera senegalensis plant extract. FTIR result indicate a signal at 3205 cm-1which is a vigorous intensity which is attributed to carboxylic acid, a strong signal was observed at 2926 cm-1which is attributed to C-H stretch (alkane),carbon-oxygen (C-O) band was observed at 1200 cm-1 which is attributed to ester, carboxylic acid or ether and aromatic functional carbon-carbon double bond at 1442 cm1, a strong intensity was observed at 1602 cm-1, which is attributed to N-H bend of primary amine, aromatic ring stretch at 1457 cm-1 was also observed with medium intensity. Alkane bend vibration was observed at 1375cm-1, and a strong signal was observed at 1162cm-1, which is attributed to C-N (Amine).
Kinetics Adsorption of Fe Metal using Cellulose Acetate from Palm Fronds (Borassus Flabellifer)
Authors: Iin Novianty  , Erma  , Saleh Asri , Gani Rahmiani
Published: July 2024

Lontar palm fronds (Borassus flabellifer), containing 5.27% cellulose, can be converted into cellulose acetate, which serves as an effective adsorbent for binding iron metal. The adsorption method optimizes the binding of the adsorbate to the adsorbent based on mass and contact time. This study aims to characterize the cellulose acetate derived from lontar palm fronds and evaluate its efficacy as an adsorbent for iron (Fe) metal. The production stages of cellulose acetate include cellulose isolation, synthesis of cellulose acetate, and testing of acetyl content, with a degree of substitution valued at 2.24. Fourier transform infrared (FTIR) spectroscopy and atomic absorption spectrophotometry (AAS) were employed to characterize the cellulose acetate. The optimal absorption capacity for Fe metal was achieved with an adsorbent mass of 0.06 g, resulting in an absorption efficiency of 66.39%. The optimal contact time was determined to be 90 minutes, with an absorption efficiency of 47.56%. The adsorption kinetics of cellulose acetate for iron (Fe) followed the Pseudo Second Order model, with R² = 0.9935 and k = 0.0096.
Characterization of Cocoa Waste Extracts for Carbon Emission Reduction
Authors: Wijaya Mohammad , Pari Gustan , Amal
Published: July 2024

Indonesia continues to experience a decline in cocoa production due to the aging of cocoa plants, conversion of cocoa plantations, pests, and diseases, as well as the government's focus on food crops. These factors contribute to the problem of decreasing cocoa yields. The objectives of this research are twofold: (1) to develop the production of cacao tea from cocoa leaves as a natural herbal drink, and (2) to identify bioactive chemical compounds resulting from the pyrolysis of cocoa waste by controlling temperature and time. The methodology employed in this study includes the analysis of lignin, cellulose, and hemicellulose content in cocoa leaves. The pyrolysis process was conducted at 300°C, 400°C, and 500°C. Extraction was performed using an extractor, where the cocoa leaf waste was mixed with water heated to 80°C for 3 hours. The analysis of flavonoid and antioxidant levels in Pinrang cocoa leaves revealed lignin levels of 43.13%, holocellulose content of 47.11%, alpha-cellulose content of 31.13%, and cellulose content of 43.13%. Proximate analysis of Kolaka Regency cocoa leaves indicated phenol levels of 529.52 mg/kg, catechin levels of 615.71 mg/kg, glucose content of 6.68%, caffeine content of 329.56 mg/kg, carbon content of 52.20%, nitrogen content of 1.24%, hydrogen content of 17.55%, and oxygen content of 29.01%. For cocoa leaf extract from Pinrang Regency, the total flavonoids were 6.01% w/w, while for Kolaka Regency, the total flavonoids were 35.10% w/w. The utilization of cocoa leaves from Kolaka Regency demonstrated superior antioxidant content compared to those from Pinrang Regency. This indicates that cacao tea products made from Kolaka Regency cocoa leaves have great potential for development as a herbal drink. However, there has been limited research on this topic, particularly regarding the use of cocoa waste for cacao tea products. The utilization of cocoa waste is crucial for reducing carbon emissions.
THE INFLUENCE OF BOPO, DPK, MUDHARABAH FINANCING ON FINANCIAL PERFORMANCE WITH CAPITAL STRUCTURE AS AN INTERVENING VARIABLE
Authors: Azizah Nora Wafiq , Sulistyo  , Irianto Mochamad Fariz
Published: July 2024

This study examines the effect of BOPO, DPK, and mudharabah financing on the financial performance of Islamic banking institutions by considering capital structure as a mediating factor. These institutions have obtained official registration from the financial service authority. This quantitative research uses the annual financial report for 2015-2020. The sample of this study consists of 5 Islamic commercial banks that are officially registered with the financial services authority. These companies were selected using purposive sampling. This study analyzes data using path analysis. The research evidence shows that BOPO, DPK, capital structure affect financial performance, but mudharabah financing does not affect financial performance. BOPO and mudharabah financing affect capital structure, but DPK does not affect capital structure. Capital structure is less able to mediate the effect of BOPO and mudharabah financing on financial performance, but capital structure is able to mediate the effect of DPK on financial performance.
Monitoring Potensi Tanah Longsor Menggunakan Metode Resistivitas Di Desa Samangki Kecamatan Simbang Kabupaten Maros
Authors: Rizal Andi Syam
Published: July 2024

Penelitian ini bertujuan untuk mengetahui area rawan longsor menggunakan metode resistivitas di Desa Samangki Kecamatan Simbang Kabupaten Maros. Penelitian ini dilakukan di Desa Samangki Kecamatan Simbang Kabupaten Maros pada 5 titik di lereng jalur Maros – Bone. Pengukuran dilakukan untuk mendeteksi potensi tanah longsor menggunakan metode resistivitas konfigurasi wenner alpha. Data yang diperoleh berupa besar tegangan dan arus kemudian dianalisis melalui Software Microsoft Excel dan Res2DInv untuk mendapatkan penampang model 2-Dimensi. Hasil penampang 2-D digunakan untuk memperoleh struktur batuan di bawah permukaan bumi. Hasil penelitian menunjukkan adanya lapisan napal pasiran, gamping pasiran, dan gamping koral pada wilayah pengukuran yang merupakan bagian dari formasi tonasa batugamping. Adapun area yang rawan terjadi tanah longsor yaitu pada lintasan 2, lintasan 3, lintasan 4, dan lintasan 5, kecuali lintasan 1 yang masih didominasi oleh batuan yang memiliki nilai resistivitas tinggi dan mampu menahan area yang beresistivitas rendah di bagian atas lereng. Sedangkan ke 4 lintasan lainnya berada di area yang curam dan terindikasi adanya rekahan yang tersaturasi air, sehingga  berpotensi terjadi tanah longsor pada jarak yang sama yakni 110 meter.
SMEs and e-commerce. Why or why not?
Authors: Fakieh Bahjat , Wali Arwa M.
Published: July 2024

E-commerce plays an important role in many organizations and businesses, including small and medium-sized enterprises (SMEs). Although the body of scientific knowledge carries significant research in addressing the main drivers and challenges of e-commerce among SMEs, the Saudi market was untouched, especially after the official Saudi government classification of SMEs back in December of 2016. Therefore, this study aims to explore the most common factors and challenges of SMEs when utilizing e-commerce in Saudi Arabia. It focused on Jeddah City as the second-largest city and the main seaport of the country. This research is based on a quantitative survey carried out among 63 firms, due to the difficulty in reaching a larger number of participants who had dedicated time and budget. The examined factors were collected from the literature and classified using the Technology, Organization, and Environment Model (TOE). Out of 63 firms, only six were adopting e-commerce. This led us to focus more on the challenges that hindered the remaining 57 from utilizing e-commerce. The analysis results uncovered the status of e-commerce among a sample of Saudi SMEs and showed that the knowledge and awareness level of e-commerce potential for businesses play a significant factor in reaching this incredibly low number.
Identifying green skills gaps through labor market intelligence
Authors: Nikoloski Dimitar , Sulich Adam , Sołoducho-Pelc Letycja , Mancheski Gjorgi , Angelski Marjan , Petkoska Marija Midovska
Published: July 2024

The aim of this paper is to introduce a research project dedicated to identifying gaps in green skills by using the labor market intelligence. Labor Market Intelligence (LMI). The method is primarily descriptive and conceptual, as the authors of this paper intend to develop a theoretical background and justify the planned research using Natural Language Processing (NLP) techniques. This research highlights the role of LMI as a tool for analysis of the green skills gaps and related imbalances. Due to the growing demand for eco-friendly solutions, there arises a need for the identification of green skills. As societies shift towards eco-friendly economic models, changes lead to emerging skill gaps. This study provides an alternative approach for identification of these gaps based on analysis of online job vacancies and online profiles of job seekers. These gaps are contextualized within roles that businesses find difficult to fill due to a lack of requisite green skills. The idea of skill intelligence is to blend various sources of information in order to overcome the information gap related to the identification of supply side factors, demand side factors and their interactions. The outcomes emphasize the urgency of policy interventions, especially in anticipating roles emerging from the green transition, necessitating educational reforms. As the green movement redefines the economy, proactive strategies to bridge green skill gaps are essential. This research offers a blueprint for policymakers and educators to bolster the workforce in readiness for a sustainable future. This article proposes a solution to the quantitative and qualitative mismatches in the green labor market.
Issues on numerical modelling of transport processes in granular reactive media – an approach with thermal relaxation
Authors: Polesek-Karczewska Sylwia , Kardaś Dariusz
Published: July 2024

The steadily growing interest in applying granular media in various novel and advanced technologies, particularly in the energy sector, entails the need to gain in-depth knowledge of their thermal and flow behaviour and develop simulation predictive tools for systems’ design and optimisation. The focus of the present study is on the numerical modelling of the thermal decomposition of solid fuel grains in a packed bed while considering a non-classical description of heat transfer in such a medium. The work aims to assess the influence of the relaxation time and thermo-physical properties of the medium on the nature of the solution and highlight the factors that are the source of local non-equilibrium affecting thermal wave speed propagation. The analysis of the predicted temperature distribution was carried out based on the developed transient one-dimensional thermal and flow model, taking into account the moisture evaporation and the devolatilization of fuel particles. Obtained simulation results showed a significant increase in the temperature gradients with increased relaxation times for the case of wet granular bed. They also demonstrated the variable dynamics of thermal wave propagation due to the change in the packed bed structure with the process progress. For a relaxation time of 100 s, a several-fold increase in the temperature signal propagation speed during the fuel bed thermal decomposition was predicted.
CFD analysis of the effect of bed geometry on H2O adsorption and desorption efficiency
Authors: Janusz Szymon , Borcuch Marcin , Cyklis Piotr
Published: July 2024

The article presents a comprehensive computational fluid dynamics analysis of the adsorption and desorption cycles in adsorption refrigeration systems, focusing on the impact of the adsorbent bed geometry. The entire adsorption/desorption cycle has been modeled, allowing for the observation of events during the transitional period between processes and how these influence their progression. This approach is a novelty in the field. The developed numerical model was verified against experimental data available in the literature, demonstrating excellent convergence with the experiment, with a de-viation not exceeding 2%. The study illustrates how the geometrical parameters such as height and length of the bed affect the efficiency of the adsorption and desorption processes, emphasizing the importance of bed geometry in the adsorption of heat and mass exchangers in energy and adsorbate transfer. The research findings provide valuable insights for designing more efficient cooling devices using adsorption technology, highlighting the role of bed geometry in optimizing these systems. Modeling the entire adsorption/desorption cycle is a novelty and allows for the observation of what happens during the transitional period between processes and how this influences their progression.
Modelling of heat transfer during flow condensation of natural refrigerants under conditions of increased saturation pressure
Authors: Głuch Stanisław , Mikielewicz Dariusz
Published: July 2024

The paper presents a modified in-house model for calculating heat transfer coefficients during flow condensation, which can be applied to a variety of working fluids, but natural refrigerants in particular, at full range thermodynamic parameters with a particular focus on increased saturation pressure. The modified model is based on a strong physical basis, namely the hypothesis of analogy between the heat transfer coefficient and pressure drop in two-phase flow. The model verification is based on a consolidated database that consists of 1286 data points for 7 natural refrigerants and covers the reduced pressure range (the ratio of critical pressure and saturation pressure) from 0.1 to 0.8 for different mass velocities and diameters. The new version of the in-house model, developed earlier by Mikielewicz, was compared with 4 other mathe-matical models widely recommended for engineering calculations and obtained the best consistency results. The value of the mean absolute percentage error was 28.13% for the modified model, the best result among the scrutinised methods.
Convection and heat transfer analysis of Cu-water rotatory flow with non-uniform heat source
Authors: Prathibaa Alfunsa , Babub P. Johnson , Sathyanarayanac Manthri , Devid B. Tulasi Lakshmi , Bandarie Shanker
Published: July 2024

This article explores the phenomenon of natural convection in the rotatory flow of Cu-water nanofluid under the influence of non-uniform heat source. In order to design more effective and efficient cooling systems, this work attempts to increase our understanding of how nanofluids behave in the presence of non-uniform heat sources, convection, and rotatory force. The higher order partial differential equations governing the flow are remodelled into ordinary differential equations using similarity transformations. The remodelled equations were solved using shooting methodology and the Lobatto-III A algorithm. The impacts of various parameters such as the Richardson number (1 < Ri < 4), the Schmidt number (0.5 < Sc < 2), nanoparticle’s volume fraction (0.02 < ϕ < 0.08), etc. on velocity, concentration and temperature was ana-lysed. One of the main findings of this analysis was study of the impact of the space dependent heat source (0.2 ≤ A ≤ 1) and the temperature dependent internal heat source (0 ≤ B ≤ 0.5) on the heat regulation. Furthermore, increasing the quantity of the nano-additives and improving the fluid’s thermophysical properties intensified the acceleration of the fluid elements in the flow region. The presence of spatial and temperature-sensitive parameters facilitated quantification of the effects of a standard and variable heat source in combination of Coriolis force in the case of a Cu-water flow. The findings of the investigation will be helpful in the process of medical, architectural planning systems, oil recovery systems and so on.