bluuebunny/crossref_metadata_2025 huggingface dataset:
Linear and nonlinear optical response based on the GW-Bethe-Salpeter and Kadanoff-Baym approaches for two-dimensional layered semiconductor materials
Authors: Skachkov Dmitry , Englund Dirk , Leuenberger Michael
Published: October 2024

The family of 2D layered semiconductors, including transition metal chalcogenides (TMCs) of the form MX (M=Ga, In; X=S, Se, Te) exhibit exceptional nonlinear optical properties. The energetically most favorable crystal ordering for nonlinear response is the AB layer stacking, which breaks central inversion symmetry for an arbitrary number of layers, resulting in non-zero off-diagonal elements of the χ^(2n′) tensor, n′being a positive integer, for arbitrary thickness of the materials. We perform first-principles many-body calculations of band structures and linear and nonlinear optical responses of monolayer (ML) and bulk TMC crystals based on GW -Bethe-Salpeter and Kadanoff-Baym approaches in and out of equilibrium, respectively, while taking many-body band gap renormalization and excitonic effects into account. We develop a detailed analysis of the linear and nonlinear optical selection rules by means of group and representation theory, showing strong connection to crystal symmetry and orbital characters of the bands and providing a method to predict the strength of linear and nonlinear response of new materials. We observe the general trend that the lowest-energy excitons are dark in 2D ML TMCs whereas they are bright or mixed bright-dark in 3D bulk TMCs, which we attribute to the difference between spatially dependent screening in 2D and constant screening in 3D. In particular, we derive general formulas for the nonlinear optical response based on exciton states in semiconductor materials. We find anti-bound excitons in ML GaS, which we attribute to dominant exciton exchange interaction. We show that by choosing elements with larger mass and by reducing the detuning energy it is possible to increase the nonlinear response not only for χ^(2) and χ^(3), responsible for SHG and third harmonic generation (THG), but also in general for χ^(n) nonlinear response with n > 3, giving rise to high harmonic generation (HHG) in 2D semiconductor materials. We achieve good to excellent agreement with experimental measurements of linear exciton spectra and nonlinear coefficients for ML and bulk GaS, GaSe, and GaTe for χ^(n) , n = 2 and n = 3. We predict the nonlinear response of InTe and AlTe for 2 < n < 7. The HHG regime has so far been rarely considered, both theoretically and experimentally. We predict high values of SHG, THG, and HHG for the TMC family of materials for 2 ≤n ≤7, which is in agreement with similar trends in transition metal dichalcogenides.
Chasing nature’s anion binders
Authors: Li Junhong , Shang Vivian G. , Clegg Jack K. , Wu Xin
Published: October 2024

Solute binding proteins can capture strongly hydrated substrates from water with high affinity. Notable examples are the sulfate binding proteins (SBPs), which use neutral NH and OH groups to stabilize highly charged sulfate anions without salt-bridge formation. Synthetic receptors are yet to achieve comparable capabilities solely by hydrogen bonds or other ion-dipole interactions. Here we report charge-neutral urea cages which have strong affinities for CrO42–, SO42– and Cl– up to micromolar and sub-micromolar levels in water, with tunable anion selectivity based on size match. This is despite the fact that these urea cages are much smaller than proteins and have their anion binding sites exposed to water, demonstrating synthetic receptors’ hydrogen bonding potency that emulates nature’s anion binders.
Upcycling orange waste biomass into bio-aerogels
Authors: T. Possari Laís , G. Otoni Caio , Budtova Tatiana , H. P. Bettini Sílvia
Published: October 2024

The orange juice industry produces large amounts of by-products. In this work, we demonstrate for the first time a strategy to upcycle orange juice side streams into high-added-value materials, bio-aerogels. Bulk biomass and its fractions (peels, bagasse and pulp) were first subjected to citric acid hydrolysis, a “green” water-based treatment. Processing parameters (washing with water, biomass fraction, and biomass and citric acid concentrations) were tuned to maximize suspensions’ kinetic stability and produce homogenous aerogels. Removing soluble sugars during biomass washing and increasing biomass and citric acid contents led to higher stability of the suspensions, bearing mainly soluble pectin as a continuous phase with dispersed swollen insoluble fraction. Suspensions’ rheological properties, insoluble fraction contents, and swelling capacities were evaluated. The prepared suspensions were subjected to non-solvent-induced phase separation and solvent exchange with ethanol, followed by drying with supercritical carbon dioxide. The obtained bio-aerogels possessed low densities (< 0.1 g/cm³) and high specific surface areas (190 - 235 m²/g). The insoluble swollen fibers were porous and embedded in an open-pore nanostructured network.
Thermodynamics of Solids Including Anharmonicity Through Quasiparticle Theory
Authors: Blancas Ernesto , Lobato Álvaro , Izquierdo Ruiz Fernando , Márquez Antonio M. , Recio J. Manuel , Nath Pinku , Plata José J. , Otero de la Roza Alberto
Published: October 2024

The quasiharmonic approximation (QHA) in combination with density-functional theory is the main computational method used to calculate thermodynamic properties under arbitrary temperature and pressure conditions. QHA can predict thermodynamic phase diagrams, elastic properties and temperature- and pressure-dependent equilibrium geometries, all of which are important in various fields of knowledge. The main drawbacks of QHA are that it makes spurious predictions for the volume and other properties in the high temperature limit due to its approximate treatment of anharmonicity, and that it is unable to model dynamically stabilized structures. In this work, we propose an extension to QHA that fixes these problems. Our approach is based on four ingredients: i) the calculation of the n-th order force constants using randomly displaced configurations and regularized regression, ii) the calculation of temperature-dependent effective harmonic frequencies omega(V,T) within the self-consistent harmonic approximation (SCHA), iii) Allen's quasiparticle (QP) theory, which allows the calculation of the anharmonic entropy from the effective frequencies, and iv) a simple Debye-like numerical model that enables the calculation of all other thermodynamic properties from the QP entropies. The proposed method is conceptually simple, with a computational complexity similar to QHA but requiring more supercell calculations. It allows incorporating anharmonic effects to any order. The predictions of the new method coincide with QHA in the low-temperature limit and eliminate the QHA blowout at high temperature, recovering the experimentally observed behavior of all thermodynamic properties tested. The performance of the new method is demonstrated by calculating the thermodynamic properties of geologically relevant minerals MgO and CaO. In addition, using cubic SrTiO3 as an example, we show that, unlike QHA, our method can also predict thermodynamic properties of dynamically stabilized phases. We expect this new method to be an important tool in geochemistry and materials discovery.
The Comparative Analysis of Photocatalytic Degradation of Mixture of Dyes using Green Metal Nanoparticles.
Authors: Bordiwala Rashmi
Published: October 2024

In this study, photocatalytic degradation of mixture of dyes consisting of Methylene blue and Methyl orange has been highlighted using green metal nanoparticles. Over here metal nanoparticles were synthesised using aqueous extract of roots of plants which have not been reported so far. Synthesised green metal nanoparticles have been characterised using spectroscopy and microscopy techniques. FEG-SEM results shows all the metal nanoparticles have been formed in the range of 1-100nm. Further , its photocatalytic activity towards degradation in mixture of dyes using monometallic and bimetallic approach has been studied. This study illustrates that Copper Nanoparticles were found to be more efficient photocatalyst as compared to Silver Nanoparticles and Zinc Nanoparticles were found to be more efficient photocatalyst as compared to Titanium Nanoparticles.Overall, reported findings in this study contributes towards economical selection of metal nanoparticles used in photocatalytic degradation of toxic organic Azo dyes compared to expensive metal nanoparticles.
Caracterización de la respuesta de una membrana flexible semitransparente sometida a deformaciones de volumen mediante métodos ópticos no invasivos
Authors: Uribe López Ubaldo , Gutiérrez Hernández David Asael , Estrada Tolentino Karina
Published: October 2024

Los procesos de deformación de las membranas biológicas desempeñan un papel fundamental en numerosas funciones fisiológicas del cuerpo humano, como la respiración y la circulación sanguínea, presentes en tejidos y órganos como el corazón, los pulmones y los vasos sanguíneos. La capacidad de estos tejidos para deformarse y recuperar su forma original en respuesta a estos patrones es esencial para el correcto funcionamiento y supervivencia del organismo. El objetivo principal de esta investigación es desarrollar un método para caracterizar la respuesta de una membrana flexible a deformaciones de volumen, con el fin de simular el comportamiento de tejidos biológicos. Se busca proporcionar un enfoque que permita comprender mejor estos procesos y su relevancia para el diagnóstico y tratamiento de enfermedades respiratorias y cardiovasculares. El estudio describe un método no invasivo para medir los patrones de deformación de una membrana de látex mediante la técnica de doble proyección de franjas, que incluye la aplicación de un filtro de frecuencias para obtener un patrón de Moiré y la recuperación de la fase óptica utilizando un algoritmo basado en la transformada isotrópica de cuadratura. Se efectúa un análisis de la caracterización de la membrana a diferentes entradas de aire, representadas por funciones tales como triangular, senoidal, rampa y exponencial, utilizando la función de transferencia del sistema. Los resultados obtenidos demuestran una exitosa recuperación de la función de respuesta de la membrana mediante el método propuesto. La función de transferencia revela patrones significativos de la membrana frente a los distintos estímulos, lo cual permite identificar posibles relaciones entre la entrada de aire y la respuesta mecánica, así como con su rigidez y su capacidad de deformación. Estos hallazgos resaltan la relevancia del enfoque para medir deformaciones precisas en estructuras flexibles, con aplicaciones potenciales en dispositivos biomédicos y ciencias de materiales. La importancia de la investigación radica en la posibilidad de implementar un sistema simple y de fácil reproductibilidad, consiguiendo mediciones de alta precisión.
Aprendizaje sobre acción climática, huella y mercado de carbono mediante un juego serio - BONOPOLYC
Authors: Rojas David , Londoño Laura , González Vanessa , Arias Jaime
Published: October 2024

El cambio climático es un problema real del cual no se ha tomado total conciencia; el calentamiento global incrementa la temperatura de la tierra, altera el equilibrio habitual de la naturaleza, los ecosistemas y todas las formas de vida. Los gobiernos, las organizaciones, la academia y la sociedad en general juegan un papel fundamental en el propósito de mitigar este fenómeno y debe ser compromiso de todos. En este contexto, la academia es llamada a tomar un rol de liderazgo en la formación de personas consientes de la problemática, que puedan proponer y poner en marcha acciones concretas de solución. Por otro lado, los juegos serios son juegos específicamente diseñados con un propósito de aprendizaje, que permiten la enseñanza de diversas temáticas mientras los participantes se divierten y que presentan una valiosa oportunidad para la formación en temáticas como el cambio climático. La presente investigación propone el diseño de un juego serio centrado en la formación en cambio climático, huella y mercados de carbono, que, además, permita concientizar sobre las acciones de las organizaciones y mostrar alternativas para mitigar el problema. Para esto se utilizó una metodología de diseño de juegos serios compuesta por tres fases fundamentales, que guía a los diseñadores en un proceso iterativo y amigable. El juego diseñado “Bonopolyc” es un juego de tablero que propicia la competencia entre participantes; estos deben compensar el CO2 que han emitido algunas industrias mediante la respuesta a diversas preguntas relacionadas con cambio climático, huella y mercados de carbono, que les permiten aprender y divertirse de manera simultánea. La herramienta diseñada fue aplicada a un grupo de 15 estudiantes de posgrado con el objetivo de validar los elementos de juego incluidos y la adquisición de conocimientos de la temática planteada. Los resultados muestran que “Bonopolyc” es un juego amigable, intuitivo y divertido, que efectivamente logró formar a los participantes en las temáticas abordadas.
El impacto del uso de una secuencia didáctica para el estudio de la gestión de la cadena de abastecimiento en los estilos de aprendizaje de los estudiantes de ingeniería industrial
Authors: Suarez Riveros Erika Alejandra
Published: October 2024

El presente artículo tiene como finalidad a terminar el impacto del uso del juego de la cerveza en estudiantes de Ingeniería Industrial y la relación con los estilos de aprendizaje, para ello se utilizó un inventario de ideas previas KPSI y el inventario de estilos de aprendizaje de David Kolb. Se evidenció un ligero cambio en los estilos de aprendizaje y se resalta el impacto en los estudiantes, en la apropiación de conocimiento y la motivación en la clase.
Perancangan Sistem Kontrol Mesin Packing Buncis Otomatis Berbasis Programmable Logic Controller (PLC) Di Gabungan Kelompok Tani (Gapoktan) Lembang Agri
Authors: Agustiawan Iwan , Firmansjah Eka Taufiq , Nugroho Wahyu
Published: October 2024

ABSTRAK Tingginya kebutuhan ekspor sayuran buncis kenya, membuat para petani Lembang Agri harus menjaga kualitas dan kuantitas dari produk yang di ekspor. Oleh karena itu para petani membutuhkan mesin yang dapat membantu proses packing sayuran buncis secara otomatis. Dengan adanya mesin packing sayuran buncis otomatis diharapkan dapat meningkatkan produktivitas, safety, dan meningkatkan kualitas produk. Mesin packing buncis kenya otomatis yang dirancang menggunakan Programmable Logic Controller (PLC). PLC berperan dalam sistem kendali jalannya konveyor dan aktuator. Caranya dengan mengatur massa buncis yang akan di input pada sensor loadcell, bobot buncis yang akan ditimbang yaitu 250gr dan 350gr. Oleh karena itu dalam penelitian ini dibahas mengenai sistem kontrol mesin packing buncis otomatis yang berbasis kendali Programmable Logic Controller (PLC) menggunakan Software Automation Studio dan Software Zelio Soft. Dari Software yang digunakan menghasilkan Program ladder yang siap di upload ke PLC dengan 2 bobot massa yang berbeda, skema input output PLC dan wiring diagram. Kata kunci : Mesin Packing, Buncis Kenya, PLC,  Automation Studio, Zelio Soft. ABSTRACT  The high export needs of Kenyan beans, make Lembang agri farmers must maintain the quality and quantity of products exported. Therefore, farmers need a machine that can help the packing process of beans automatically. With the automatic packing machine, green beans are expected to increase productivity, safety, and improve product quality. One of them is the use of automatic kenya bean packing machines based on Programmable Logic Controller (PLC). PLC plays a role in the control system of conveyors and actuators. The trick is to adjust the mass of beans that will be input to the load cell sensor, the weight of the beans to be weighed is 250gr and 350gr. Therefore, this research discusses the automatic bean packing machine control system based on Programmable Logic Controller (PLC) control using Automation Studio Software and Zelio Soft Software. The software used produces a ladder program that is ready to be uploaded to the PLC with 2 different mass weights, a PLC input output scheme and a wiring diagram. Key words : Packing Machine, Beans kenya, PLC, Automation Studio, Zelio Soft.
Rancang Bangun Resevoir Pendingin Menggunakan Chiller dan Pengujian Pada Hasil Pemotongan Plastic Composite Kapasitas 5 kg/jam
Authors: Latief Alfan Ekajati , Sirodz Muhamad Pramuda , Febriyanto Naufal Dwi , Akbar Sobari , Pratama Muhammad Rezki
Published: October 2024

ABSTRAK Untuk memperoleh bentuk pellet composite tersebut diperlukan proses pendinginan, material komposit dari mesin extruder sebelum dilakukan pemotongan. Proses pendinginan material komposit mempengaruhi proses pemotongan menjadi bentuk pellet, oleh karena itu pada penelitian ditentukan resevoir pendingin yang digunakan agar suhu air yang ada didalam reservoir tetap stabil. Metode penelitian ini berupa rancang bangun sebagai reservoir pendinginan menggunakan chiller dan menguji pemotongan plastic composite. Hasil perancangan di peroleh resevoir dengan dimensi 150 cm x 20 cm x 30 cm dan mesin pendingin dengan kapasitas 1 Pk. Tempratur material di mesin extruder sebesar 195 C didinginkan oleh air dengan tempratur 10 C dan 27 C, sehingga material plastic composite menjadi kaku akibat pendinginan cepat. Hasil uji keras bahwa material komposit yang telah didinginkan dengan tempratur 10 C memiliki kekerasan rata – rata 11,82 VHN. Dimana kekerasan material ini lebih keras di bandingkan pada suhu 27 C yang sebesar 7,82 VHN. Produk hasil pendinginan, kemudian dipotong menjadi bentuk pellet dengan ukuran mesh 4, hasil pemotongan di peroleh kapasitas pemotongan 4,30 kg selama 60 menit dengan hasil pemotongan yang seragam sebanyak 90%.  Kata Kunci : Water Chiller, PPHI , Serat nanas, mesin pemotong  ABSTRACT To obtained the composite pellet form is required cooling process, composite material from extruder machine before cutting. The cooling process of the composite material affects the cutting process into pellet form, therefore the research determined the cooling reservoir used so that the water temperature in the reservoir remains stable. This research method is in the form of design as a cooling reservoir using a chiller and testing the cutting of plastic composite. The results of the design obtained a reservoir with dimensions of 150 cm x 20 cm x 30 cm and a cooling machine with a capacity of 1 Pk. The material temperature in the extruder machine is 195 C cooled by water with a temperature of 10 C and 27 C, so that the plastic composite material becomes stiff due to rapid cooling. The results of the hard test that the composite material that has been cooled with a temperature of 10 C has an average hardness of 11.82 VHN. Where the hardness of this material is harder than at 27 C which amounted to 7.82 VHN. The result of the cooling, then cut into a pellet size of mesh 4. And the result of cutting obtained a cutting capacity of 4,3  kg for 60 minutes with a uniform cutting result of 90%. Keywords: water chiller, PPHI, Fiber Nanas, Cutting Machine.
SIFAT MEKANIK SILICONE RUBBER SEBAGAI KANDIDAT BAHAN PENGGANTI ALAT LATIHAN SUTURING
Authors: Dzulfikar Muhammad , Pangestu Wahyu Adi , Purwanto Helmy , Wahid Muhammad Abdul , Ismail Rifky , Prawibowo Hartanto
Published: October 2024

Kulit manusia memiliki sifat viskoelastik, artinya kulit dapat memanjang ketika ditarik, dan kembali ke posisi semula ketika tarikan dilepas, sifat ini sama dengan sifat elastisitas karet. Karet terus berkembang dan meningkat seiring meningkatnya pertumbuhan kebutuhan alat medis. Karet silikon sebagai kandidat bahan alat latihan suturing/menjahit luka, dengan bahan karet silikon dipilih dari jenis silicone rubber RTV (Room Temperatur Vulcanizing) RTV-48 dan RTV-52. Sifat mekanik dari silicone rubber dari kekuatan tarik, perpanjangan putus menggunakan standar ISO 37 dan kuat sobek menggunkan standar ISO 34-1, sifat mekanik silicone rubber akan diuji menggunakan Mesin UTM / (Universal Testing Machine). Tujuan dari penelitian untuk mengetahui kelayakan karet silikon jenis RTV-48, dan RTV-52 dengan campuran katalis untuk digunakan sebagai kandidat bahan alat latihan menjahit luka. Dari hasil pengujian yang didapatkan pada RTV 48 campuran silicone rubber 150 ml dan 15 ml katalis mempuyai kekuatan tarik yang tertingi di angka 1,89 N/mm2, dan pengujian perpanjangan putus RTV 48 campuran silicone rubber 150 ml dan 10 ml katalis mempuyai yang tertingi di angka 194%,  untuk kuat sobek nilai tertingi didapatkan pada RTV 48 campuran silicone rubber 150 ml dan 10 ml katalis di angka 1,44 N/mm2, sedangkan RTV 48 campuran silicone rubber  150 ml dan 10 katalis menghasilkan modulus elastisitas 1,8 MPa dan 0,6 % regangan.
Analisis Penggunaan Limbah Resin Coated Sand sebagai Substitusi pada Cetakan Greensand Terhadap Karakteristik Pengecoran Logam Aluminium
Authors: Nurdin Akhmad , N Muhammad Dwi , S Ardi Bagus , Paundra Fajar , Muhyi Abdul , Pujiyulianto Ekko , K Putra Andi , N Fajar Perdana , S Farid Nanda , D Febri Budi
Published: October 2024

Resin Coated Sand atau RCS  salah satu jenis cetakan yang digunakan untuk proses pengecoran logam dan menghasilkan limbah yang mengandung resin. Sebagian besar limbah RCS  masih dapat  didaur ulang, karena masih mengandung pasir silika dan berukuran lebih kecil dibandingkan pasir silika untuk cetakan greensand. Cetakan greensand terdiri dari pasir silika dengan pengikat merupakan cetakan pasir yang sering digunakan pada industri pengecoran logam. Penelitian ini bertujuan untuk mengetahui bagaimana pengaruh penambahan limbah pasir RCS pada cetakan greensand terhadap karakteristik kekerasan dan struktur mikro pada peleburan ulang aluminium-silikon. Penelitian ini dilaksanakan untuk mendapatkan data pada komposisi limbah cetakan pasir RCS dengan presentase 0%, 20%, dan 40% terhadap pasir baru grendsand, sedangkan material logam aluminium yang digunakan pada penelitian ini mengunakan limbah sepatu rem tromol sepeda motor. Hasil pengecoran logam didapat spesimen logam aluminium yang diuji kekerasan dan metalografi. Pada penambahan RCS 20% menunjukkan nilai kekerasan yang cenderung sama pada penambahan 0%, namun nilai kekerasan akan naik 2,4 kali pada penambahan RCS 40%. Berdasarkan pengujian metalografi penambahan RCS 40% menunjukkan struktur fasa Si yang cenderung lebih meluas dibandingkan pada penambahan 0% dan 20%.
Optimasi Uji Tegangan Tarik Pengelasan Tungsten Inert Gas pada Penggabungan Beda Material Baja Galvanish (SGCC) dengan Baja Karbon Rendah (SPCC-SD)
Authors: Saputra Ridhwan Shalahuddin , Khoirudin Khoirudin , Karyadi Karyadi , Hidayat Syahrul Taufik , Cahyo Tegar Dwi , Ramadan Trisa
Published: October 2024

Pengelasan adalah salah satu proses utama dalam industri manufaktur yang digunakan untuk menggabungkan dua atau lebih material logam. Salah satu metode pengelasan yang umum digunakan adalah Tungsten Inert Gas (TIG) welding. TIG welding merupakan teknik pengelasan dimana terjadi pembentukan busur listrik antara elektroda yang tidak meleleh dengan material kerja. Pengelasan TIG antara baja galvanis (SGCC) dan baja karbon rendah (SPCC-SD) sering digunakan pada industri otomotif karena kedua material tersebut memiliki karakteristik yang berbeda sehingga bisa digunakan pada kondisi operasional yang berbeda. Penelitian ini menggunakan metode Taguchi dengan tiga tingkat percobaan dan tiga faktor yang berbeda, yaitu Arus listrik, Laju aliran gas argon, dan diameter kampuh las. Hasil penelitian menunjukan bahwa flowrate adalah parameter yang paling penting karena memiliki perbedaan nilai S/N ratio yang paling besar. Hal ini menunjukan flowrate memiliki nilai yang signifikan lebih tinggi daripada arus dan diameter kampuh las sehingga berperan penting dalam menentukan kualitas kekuatan sambungan pengelasan TIG pada material SGCC dan SPCC-SD terhadap tegangan tariknya. Hasil analisis rasio S/N menunjukkan bahwa parameter yang paling optimal adalah arus listrik 55 A, laju aliran gas 18 lpm, dan diameter las 5 mm. Sementara itu, analisis ANOVA menunjukkan bahwa laju aliran gas memiliki kontribusi paling signifikan dalam mempengaruhi beban tarik pada pengelasan TIG bahan SPCC-SD (JIS 3141) dengan SGCC (JIS 3302) yaitu sebesar 23,24%. Selanjutnya disusul oleh diameter kampuh las dan arus pengelasan masing-masing memberikan kontribusi sebesar 19,82% dan 8,34%.
Program for forming psychological readiness for professional communication in future pre-school education teachers during the process of studying at university
Authors: Suvorova O. V. , Selukova N. S.
Published: October 2024

Introduction. The article deals with the problem of preparing specialists of the preschool education system for future professional activity in the process of studying at higher school. The authors present the basic concept for the creation and implementation of the main stages of the program for the formation of psychological readiness among students of preschool education for professional communication with all subjects of the educational process. The modular principle of designing a program based on the main components of the structure of psychological readiness is discussed, and the need to increase the practical training of future teachers of preschool education is noted.

   Materials and Methods. The research used: theoretical methods: analysis of scientific publications, psychological and pedagogical literature; synthesis and interpretation, method of generalization and systematization of information, modeling of the process of formation of psychological readiness for professional communication; empirical research methods: psychological and pedagogical experiment, testing, direct and indirect observation, proximetric techniques; data analysis methods: methods of mathematical statistics, quantitative and qualitative analysis of the results.

   Results. The authors substantiate and concretize the scientific and theoretical foundations, approaches and principles, organizational, psychodidactic and psychological-pedagogical conditions, present a detailed approbation of the program, assess the dynamics of the formation of psychological readiness for professional communication among future teachers of preschool education. The program allows undergraduate students to consistently master general cultural and general psychological communicative competencies; skills, abilities, actions of planning, designing, building, accumulating individual experience of interpersonal and professional communication with different subjects of the educational process; building personalized communication models with different target groups and subjects of education; to form the initial style of professional communication of the future teacher, his value-semantic, a substantial and structural-organizationaloutline.

   Discussion and Conclusions. The performed research has shown the need and possibility of systematic and systematic formation of psychological readiness for professional communication among students of preschool education in the process of studying at a university. The psychological readiness of students of preschool education has its own characteristics and correlates with the requirements for the professional competencies of a future teacher of preschool education.
The Influence of the PERMA Model on EMP Students’ English Speaking Performance
Authors: Ly Tra-My Thi , Nguyen Huan Buu
Published: October 2024

Despite gaining great concerns in English language teaching (ELT), students’ wellbeing and the role of the Positive emotion, Engagement, Relationship, Meaning in life and Accomplishment (PERMA) model has not been thoroughly explored in English for Specific Purposes (ESP) and especially English for Medical Purposes (EMP). In Vietnam, the PERMA model has also been understudied, especially in ELT. These gaps trigger this study to examine the increased importance of student wellbeing in academic settings, with a particular focus on English learning and speaking performance. Conducted at a university of Medicine and Pharmacy in the Mekong Delta, the mixed-methods research involved 675 students who completed a questionnaire via Google Forms and five volunteers who attended face-to-face interviews to provide triangulated data. The sampling technique and data analysis methods used in the study included the convenience sampling technique, the Descriptive analysis of the SPSS version 22, and the thematic analysis. The results show that the PERMA model has a moderate to high impact on EMP students’ speaking performance. The aspects of the PERMA model were ranked in order of influence as follows: Accomplishment, Positive emotion, Engagement, Relationship, and Meaning in life. Based on these findings, it is recommended that EMP lecturers and ELT teachers integrate this model into their teaching methods for English speaking. These findings will inform the development of PERMA-based learning activities in future EMP English speaking lessons, supporting a larger ongoing project. Recommendations for further studies and related stakeholders were also made.
Education Policy Implementation at School Level: A Study of School Strategies for Facing Social Change at Klaten Senior High School, Indonesia
Authors: Rohmadi Yusup , Rifa'i Andi Arif , Supriyanto Supriyanto , Ibrahim Rustam , Irmawati Waryunah , Suciyani Suciyani
Published: October 2024

Social changes in the digital era have had various impacts on education policy. It is important to investigate how educational institutions implement these policy practices to find out how they can realize the vision, mission and goals of education and overcome various problems of social change. This research investigated the implementation of educational policies in the face of social change in the current era of digitalization. A case study research design using a descriptive qualitative approach guided this researcher. The first findings revealed that social changes that influence educational policies in schools include changes to learning models, use of technological tools, information accessibility, interaction, and collaboration in the teaching and learning process. The second finding discussed the existence of positive impacts and potential negative risks on the implementation of school policies due to social changes that occur. The third finding explained four school policy strategies in facing social change, including curriculum adjustments, guidance counseling, collaboration, and digital literacy. The conclusion was that the education policy at Klaten Senior High School (SMA) is generally effective in dealing with the worst impacts that may occur due to social changes in the digital era. It was hoped that these findings would become concrete steps for developing education policies at the upper secondary level. The aim was to improve the ability of teachers and students to face social changes in the digital era and for a better future. The government, through educational institutions, should provide maximum support for the implementation of educational policies.
A Bibliometric Literature Review on Trends in the Internationalization of Higher Education
Authors: Li Chanjuan , Mahadi Batiah
Published: October 2024

In recent years, the internationalization of higher education has become a critical theme, reflecting global interconnectedness and the increasing mobility of students and academics. This study aims to identify and analyze trends in internationalization research from 2015 to 2024. Utilizing a bibliometric analysis of 9,180 articles and 44,000 keywords from Web of Science and Scopus databases, the research synthesizes developments in nine key fields over the past decade. Methods include data cleaning, keyword determination, and the use of Excel for data processing and analysis. The results reveal significant progress in understanding the complexities of internationalization, such as student mobility, societal and cultural integration, educational methods, and quality assurance. The study highlights the accelerated role of digital technology due to the COVID-19 pandemic and emerging national security issues. Conclusions offer new theoretical and practical insights into the role of internationalization in higher education outcomes and predict future trends. The findings have significant implications for policy-making, institutional strategies, and future research directions. This research contributes to the literature by providing a comprehensive analysis of past trends and suggesting directions for future studies, emphasizing the need for coordinated efforts from educational institutions, governments, and international organizations. Emphasis is placed on inclusivity and sustainability, with a call for innovative strategies to address emerging challenges and leverage new opportunities in the field of higher education internationalization.
Structure of herbaceous communities in areas with different natural regeneration periods in the Brazlian semi-arid
Authors: Da Silva Bárbara Laine Ribeiro , Tavares Fernanda Meira , Sampaio Everardo Valadares de Sá Barretto , Souza José Roberto Botelho de , Althoff Tiago Diniz , Almeida Jarcilene Silva
Published: October 2024

The species composition and forest structure may change due to human disturbance. Changes in the arboreal component in regenerating forests has frequently been determined, but data on the herbaceous component are less available, especially those of tropical dry forests, despite their ecological and economic importance. Thus, in regenerating dry forests in the Brazilian semi-arid area, we tested the hypotheses that: (1) richness and diversity of herbaceous species are higher, but biomasses are lower in areas with longer regeneration periods; and (2) the aboveground herbaceous component is restricted to the rainy season, and species diversity, plant density and biomass vary with different patterns along this season. Four regeneration periods were analyzed: 2 (R2), 17 (R17), 39 (R39) and more than 60 years (mature caatinga) after grazed planted pasture was discontinued. The herbaceous component began growing after the onset of the rainy season (January) and disappeared in July after the rains ceased. Richness and plant density were highest in March, whereas biomass was highest in April and May. Mature caatinga and R39 had the highest herbaceous species richness (61 species), but the lowest biomasses (167 and 98 g m-2), with the opposite occurring in R2 (48 and 381 g m-2). Alpha diversity was highest in the mature caatinga, but beta diversity in R17. As a result, the herbaceous diversity increased while the plant density and biomass decreased as the regeneration period increased.
Performance of the Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) Model in the Northeast Region of Brazil
Authors: Gabio Stalin Soares  , Mariano da Silva Emerson , Rodrigues da Silva Vicente de Paulo , Baracuy da Cunha Campos João Hugo , Tavares Silva Madson
Published: October 2024

Study is presented on the potential for using the tools contained in the Google Earth Engine (GEE) geospatial data processing and analysis platform in climatological studies in the Northeast Region of Brazil (NEB), in particular the validation of estimates of total annual rainfall obtained by the Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) model in seven homogeneous regions of the NEB. This data is made up of various sources of meteorological information, including information from satellites, numerical models and observations at weather stations in operational and research centers across the globe. The performance of the CHIRPS model was assessed using climatological data obtained from the National Meteorological Institute's (INMET) meteorological database, metrics and statistical tests. The results showed that the CHIRPS model has potential for use in six of the seven regions studied, with low errors and strong statistical correlation, and limitations in one of these regions. The conclusion is that this technological tool, which has a low operating cost and is free of charge, can be used to assist in climatological studies, planning and the development of strategies for mitigation, adaptation and coexistence with the dry periods observed in the sub-regions of the NEB, especially in regions that are in a situation of socio-economic vulnerability, as is the case in the semi-arid region of the NEB.
Mapeamento Geoambiental do Oeste do Paraná
Authors: Sandro da Rocha Anderson , Hister Giovanella Tharsos , Kraemer Zatti Gabriel , Correia de Oliveira Fabrício
Published: October 2024

O mapeamento geoambiental busca a representação espacial dos elementos físico-naturais da paisagem e suas interações com atividades antrópicas em diferentes escalas de análise. Nesse sentido, o presente trabalho tem como objetivo apresentar a caracterização geoambiental do espaço regional, com análises e mapeamentos importantes para o conhecimento da distribuição geográfica dos aspectos físico-naturais (geológicos, hidrogeológicos, geomorfológicos, climáticos, fitogeográficas e pedológicos), bem como das potencialidades ecológicas e da apropriação antrópica da paisagem pelo uso e cobertura da terra no contexto do Oeste paranaense. Para a realização do inventário de dados ambientais foram utilizadas técnicas de geoprocessamento e sensoriamento remoto, bem como trabalhos de campo para reconhecimento das potencialidades ecológicas. Ao final na pesquisa observou-se que, os mapeamentos realizados poderão contribuir com o zoneamento ambiental e com a ampliação de informações espaciais e quantitativas dos elementos físico-naturais. Além de proporcionar o conhecimento de diferentes variáveis geoambientais e demonstrar o panorama atual da utilização dos recursos naturais em escala regional, também poderá contribuir com a inserção dezenas de planos de informações georreferenciados, que se configuram como importantes para construção do geodatabase regional denominado de Portal Geoeste, atualmente em desenvolvimento. Esses produtos cartográficos poderão ainda subsidiar o planejamento ambiental e territorial no âmbito regional.
Pengaruh Resiliensi Terhadap Kesejahteraan Psikologis Mahasiswa
Authors: Amelina Ri
Published: October 2024

Penelitian ini bertujuan untuk melihat pengaruh dari resiliensi terhadap kesejahteraan psikologis mahasiswa. Alat ukur yang digunakan untuk pengumpulan data menggunakan skala resiliensi dan skala kesejahteraan psikologis yang diberikan kepada 233 mahasiswa. Teknik analisis data menggunakan analisis deskriptif dan analisis regresi linier sederhana. Hasil penelitian menunjukkan bahwa resiliensi memberikan pengaruh terhadap kesejahteraan psikologis dengan signifikansi 0.00, kemudian pengaruh yang diberikan sebesar 0.277 atau setara dengan 27.7%.
Analisis Self-esteem pada Korban Phsycal Sexual Harrasment
Authors: Ningrum Asti Ayu , Sucipto Arif Budiman
Published: October 2024

Ketidaksetaraan gender memainkan peran sentral dalam kasus sexual harassment. Fenomena ini mencerminkan struktur kekuasaan yang melibatkan dominasi satu jenis kelamin terhadap yang lainnya. Wanita sering kali menjadi korban ketidaksetaraan gender ini, Wanita menghadapi risiko yang lebih tinggi untuk mengalami sexual harassment dibandingkan pria. Sexual harassment terbagi menjadi verbal sexual harassment, non verbal sexual harassment, dan phsycal sexual harassment. Phsycal sexual harassment merupakan salah satu bentuk sexual harassment yang sering terjadi. Maka dari itu ujuan penelitian ini adalah untuk mendeskripsikan bentuk self-esteem pada korban phsycal sexual harassment, untuk mendeskripsikan faktor-faktor pembentuk self-esteem pada korban phsycal sexual harrasment, untuk mendeskripsikan faktor-faktor yang memengaruhi self-esteem pada korban phsycal sexual harrasment, dan untuk mendeskripsikan dampak self-esteem pada korban phsycal sexual harassment. Penelitian ini menggunakan metode penelitian deskripsi kualitatif, dengan subjek penelitian satu orang sebagai sumber data primer dan sumber data sekunder menggunakan informan pendukung orang terdekat dari responden. Metode pengambilan data dalam penelitian ini adalah observasi, wawancara dan dokumentasi. Langkah-langkah analisis data deskriptif kualitatif melibatkan tiga tahapan yaitu reduksi data, data display dan penarikan kesimpulan. Kemudian setelah data di analisis, dilanjutkan dengan Uji keabsahan data. Uji keabsahan data pada penelitian ini menggunakan model triangulasi. Hasil penelitian ini yaitu setelah menjadi korban phsycal sexual harrasment responden menganggap dirinya direndahkan dan memiliki rasa bersalah yang tinggi serta sulit untuk menerima dirinya sendiri. Dapat disimpulkan bahwa responden memiliki self-esteem yang cenderung rendah.
Implementasi Strategi Peri (Pengenalan Diri) Sebagai Upaya Self Disclosure pada Peserta Didik SMP
Authors: Maysawati Yesin
Published: October 2024

Penelitian ini bertujuan untuk menganalisis penggunaan strategi PERI (Pengenalan Diri) terhadap keterampilan peserta didik dalam mengungkapkan dirinya. Metode yang digunakan pada penelitian ini adalah metode deskriptif kualitatif. Teknik pada penelitian ini menggunakan teknik angket, wawancara, dan observasi yang dilakukan oleh guru terhadap peserta didik SMP. Berdasarkan hasil penelitian yang dilakukan menujukkan bahwa strategi PERI (Pengenalan Diri) dapat membantu peserta didik untuk mengungkapkan dirinya secara terbuka, sehingga memiliki konsep diri dan harga diri yang kuat. Keberhasilan peserta didik dalam mengungkapkan dirinya secara terbuka berpengaruh terhadap rasa percaya diri dan empati peserta didik. Selain itu, peserta didik dapat menyampaikan dan memahami tuturan dengan baik saat pembelajaran. Hasil dari penelitian ini adalah peserta didik dapat membawa aspek diri dari daerah tersembunyi menuju ke daerah publik. Begitu pun aspek diri pada daerah buta manjadi berada di daerah publik, setelah adanya umpan balik dari teman. Dengan begitu, daerah publik pada peserta didik menjadi lebih luas, sehingga peserta didik bisa mengungkapkan dirinya dengan terbuka. Keterbukaan ini dapat mempererat hubungan sosial antar peserta didik.
Effectiveness of Childbirth Education and Hypnobirthing Assistance in Improving Labor Outcome
Authors: Himawati Yulia , Demartoto Argyo , Murti Bhisma
Published: October 2024

Background: Childbirth education and assistance with hypnobirthing is an autohypnosis technique, namely an effort to instill positive intentions through suggestion into the soul or subconscious mind during pregnancy and preparation for childbirth. This study aims to analyze the effectiveness of childbirth education and assistance with hypnobirthing in improving childbirth outcomes.
Subjects dan Methode: The Randomized Controlled Trial (RCT) study was conducted at the Pratama D'Maryam Clinic, Yogyakarta from August to December 2023. A total of 154 pregnant women were selected for this study. Dependent variables are anxiety, depression, complications, and delivery time. The independent variables are childbirth education and assistance with hypnobirthing. Therapy is given 2 times a week with a duration of 3 hours. The study instrument is a questionnaire. Data analysis used Independent T-Test.
Results: Providing childbirth education accompanied by assistance with hypnobirthing is effective in reducing anxiety levels in pregnant women (Effect Size= 1.22; p<0.001), reducing depression levels (Effect Size= 1.19; p<0.001), and shortening labor time (Effect Size= 0.08; p = 0.016).
Conclusion: Providing childbirth education accompanied by assistance with hypnobirthing is effective in reducing anxiety levels in pregnant women, reducing depression levels, and shortening labor time.
THE ONYM «GORKY» AND THE RHETORIC OF THE PLAY «THE LOWER DEPTHS» IN THE CONTEMPORARY POLITICAL METAPHOR
Authors: Borisova L. , Segal N.
Published: October 2024

The article examines metaphors from M. Gorky’s play “The Lower Depths” in the printed and electronic media texts of the last decade. In the contemporaty political discourse they are represented in a wide range of structural and functional vatiations: exact quotation; truncated quotation; quotation with the replacement of one part or the introduction of an additional component into the construction; cognitive function, clarifying the nature of a particular social phenomenon or object; emotive-evaluative and modeling functions, clarifying the meaning of a certain social phenomenon or aiming at its discrediting; hypothetical and polemical functions, characterizing civilizational processes. The article reveals that the onym «Gorky» is less spread than Gorkian metaphors in the contemporary as well as in the entire post-Soviet media. In the early Soviet journalism the situation was the opposite. It is noted that in the 1920s Gorkian metaphors were negatively applied to the personality of the writer himself; the 1930s were characterized by the unprecedented frequency of the usage of the onym in order to glorify the writer, while his creative work was quite neglected. Meanwhile, elements of direct and implicit polemics with the author of «The Lower Depths» in contemporary media, and the «Gorky.media» Internet project reveal certain convergence of the onym with the metaphor. The article states that the attention to Gorky’s rhetoric in the media environment is mostly related to the peculiarities of the writer’s creative personality (artist and public figure in one person) as well as to his genre and style preferences (maxims, aphorisms, allegory, symbol, journalistic techniques).
OPPOSITION “TOP – BOTTOM” IN THE EARLY LYRICS OF K. D. BALMONT
Authors: Ivanova N. , Grishina S.
Published: October 2024

The article is devoted to the study of the specifics of the artistic world of K. D. Balmont as a secondary reality that projects the author’s worldview and value system. In the course of the study, the implementation of the mental opposition “top — bottom” is considered as the construction of an axiological vertical that determines the nature of the artistic space in general and its main varieties (real, astronomical, oneiric, mythological, folklore and syncretic) in particular. The symbolism of the “top” appears in the early lyrics of K. D. Balmont not only as a spatial, but also as a value guideline, reflecting the lyrical subject’s desire for higher truths and understanding of the integrity of the universe. “Bottom” is associated with a gloomy “wordlessness” and generates a desire to change space. At the same time, the author’s model of the world, which includes “upper” and “lower” spaces, is a dynamic system within which their confrontation occurs. The intentions of the “bottom” tend to spread to the world of the “top,” however, the axiological comprehensiveness of the latter, overcoming the opposition “temporary — eternal,” makes it possible to draw a conclusion about the author’s ideological attitudes. The spatial vertical is explicated through images of human habitation, plains, forests, swamps, on the one hand, and the sky, mountain and tree peaks, moon and sun, on the other, as well as solar and lunar rays connecting the “poles” of the poet’s artistic world.