bluuebunny/crossref_metadata_2025_split huggingface dataset:
ТРЕБОВАНИЯ К УГЛЕРОДИСТЫМ ВОССТАНОВИТЕЛЯМ, ПРИМЕНЯЕМЫМ В ЭЛЕКТРОТЕРМИЧЕСКИХ ПРОЦЕССАХ
Authors: Ульева Г.А. 
Published: February 2025

В статье приведена сравнительная оценка твердых углеродсодержащих восстановителей, применяемых в электротермическом процессе получения технического кремния. Рассмотрены свойства, структура традиционных и нетрадиционных углеродистых восстановителей. Нетрадиционные углеродистые восстановители были получены скоростным термо окислительным пиролизом из неспекающихся длиннопламенных углей месторождения Центрального Казахстана (Шубарколь и Куу-Чек). Приведены параметры микроструктуры (размер пор, толщина межпоровых стенок) рассматриваемых восстановителей. По мере повышения скорости нагрева происходит уменьшение размера пор. При этом образуется развитая поровая структура спецкокса, повышается его высокая реакционная способность, что является наиболее важным параметром при электротермическом восстановлении технического кремния.
In this article provides a comparative assessment of solid carbon containing reducing agents used in the electrothermal process for producing technical silicon metal. At the same time, the properties, structure of traditional and non-traditional carbon containing reducing agents are considered. Non-traditional carbonaceous reducing agents were obtained by high-speed thermal oxidizer pyrolysis from non-caking long-flame coals from the deposits in Central Kazakhstan (Shubarcol and Kuu-Chek). The microstructure parameters are given (pore size, thickness of interpore walls) of the reducing agents under consideration. As the heating rate increases, the pore size decreases. In this case, a developed pore structure of special coke is formed, its reactivity increases, which is the most important parameter in the electrothermal reducing of technical silicon metal.
Construct validity of the PHQ-9 in university students in Colombia: A Rasch analysis approach
Authors: Cassiani-Miranda Carlos Arturo , Scoppetta Orlando , Barrios-Villadiego María Alejandra , Tirado-Otálvaro Andrés Felipe , Duran-Bedoya Andrea Carolina 
Published: February 2025

Introduction: The Patient Health Questionnaire 9 (PHQ-9) is one of the most widely used screening instruments for major depressive episodes. However, there are no published studies on Rasch-type analysis of the PHQ-9 among Spanish-speaking university students. Objective: To evaluate the psychometric properties of the PHQ-9 in university students using Rasch-type models and to assess possible biases of the items according to gender. Methods: This cross-sectional observational study evaluated the psychometric performance of the PHQ-9 in health sciences students at the University of Cartagena (Colombia). A random sampling stratified by academic program, semester, and sex was used, obtaining a sample of 550 participants (9 excluded for incomplete responses). Participants signed an informed consent, and the study was approved by an ethics committee. Rasch analysis was used to assess model fit, differential item functioning, dimensionality, local independence, and reliability. Adequate internal consistency (a=0.83, w=0.89) and factorial validity were found. Results: A cross-sectional study was conducted with 550 health science students from Colombian university. The data were analyzed using a Rasch model, in which the following psychometric characteristics were verified: 1) differential item functioning, 2) dimensionality and local independence, and 3) overall fit. Only item 2 showed a tendency toward differential functioning. Conclusions: One-dimensionality and local independence of the items, moderate reliability, and good general fit were found, although there was a gap between the degree of depression measured by the PHQ-9 and the participants' responses. The Spanish version of the PHQ-9 for Colombian university students showed adequate item-level psychometric properties for screening for major depressive episodes.
The Adoption of Plasma Fine Bubble Innovation in a Seaweed Processing Factory to Implement Blue Economy Concept (A Case Study of PT. Hakiki Donarta)
Authors: Nimmi Zulbainarni  
Published: February 2025

Introduction: Seaweed is one of Indonesia's leading commodities in the mariculture sector, and its production produces wastewater. PT Hakiki Donarta is a leading seaweed processing company that currently handles its IPAL still using Polyaluminium chloride chemicals and aeration ponds with the help of water wheels.
Objectives: This condition receives special attention in the waste handling process so that the business can be environmentally friendly and sustainable as the blue economy concept is applied. Thus, Plasma Fine Bubble (PFB) will be tested to compare chemical handling and PFB handling to manage wastewater and support the blue economy concept.
Methods: Two of the principles of the blue economy are innovation and adaptation. IPB has innovative Plasma Fine Bubble (PFB) technology and has the expertise to develop commercialization strategies for PFB to support the implementation of the Blue Economy. To be in line with the roadmap, there are five main steps (key phases) and milestones in program development (innovation solutions), as follows: Prepare the Plasma Fine Bubble (PFB) System to be implemented; PFB System manufacturing and assembly process; Implementation and performance testing of the PFB generator at the Factory; Adopt and Scale the PFB System using Benefit-Cost Analysis; Create a business plan using PFB technology.
Results: The 5 key phases are completed step-by-step. Key phases 1 and 2 were completed from July to September 2023. The results of completing key phases 1 and 2 are explained. Key Phase 1: Preparing the Fine Bubble (PFB) plasma system to be implemented. Functional requirements of the PFB system implementation. Condition of the wastewater of the factory. The current situation surrounding the factory. Key Phase 2: PFB System Manufacturing and Assembly Process
Conclusions: The study confirms that Plasma Fine Bubble (PFB) technology is highly effective and sustainable for managing seaweed processing waste. By reducing waste management costs by 2%, reducing chemical costs by 40%, and addressing environmental concerns, PFB represents a significant step forward in advancing the blue economy.
Peran Ekonomi Kreatif terhadap Perekonomian Indonesia Selama Pandemi dengan Analisis Tabel Input-Output
Authors: Bernika Levina , Monika Anugerah Karta 
Published: February 2025

Ekonomi kreatif (ekraf) merupakan sektor yang berpotensi menjadi sumber pertumbuhan di tengah perlambatan ekonomi akibat mewabahnya Covid-19 di Indonesia sehingga dijadikan sebagai sasaran dalam program prioritas nasional dalam rangka percepatan pemulihan ekonomi. Namun, sumber data ekraf yang terbatas mengakibatkan kurang beragamnya informasi untuk menunjang pengembangan sektor ini. Penelitian ini bertujuan untuk memperkaya ketersediaan data ekraf dan menganalisis peran ekraf terhadap perekonomian Indonesia dengan menggunakan analisis deskriptif, analisis input-output, serta analisis uji peringkat bertanda Wilcoxon. Hasil analisis menunjukkan kontribusi sektor ekraf terhadap perekonomian Indonesia selama Covid-19 terus meningkat signifikan dilihat dari sisi permintaan. Subsektor kuliner, aplikasi dan game developer, serta televisi dan radio merupakan subsektor unggulan sehingga dapat menjadi fokus pembangunan pemerintah untuk mencapai target yang telah ditetapkan.
Sử dụng động mạch lách để tái tạo động mạch gan trong ghép gan từ người hiến sống cho trẻ em: Báo cáo một trường hợp
Authors: Hiền Phạm Duy , Trường Nguyễn Lý Thịnh , Hoàn Vũ Mạnh , Khoa Nguyễn Phạm Anh , Quỳnh Trần Anh , Tâm Trần Đức , Anh Nguyễn Thọ , Nam Trần Xuân , Sơn Nguyễn Công , Yến Phạm Thị Hải , Long Phan Hồng 
Published: February 2025

Chuyển vị động mạch lách là một kỹ thuật hiệu quả để tái tạo động mạch trong ghép gan từ người hiến sống, đặc biệt khi động mạch gan của người nhận không phù hợp để khâu nối. Chúng tôi báo cáo một trường hợp trẻ nữ 12 tuổi chẩn đoán: Suy gan cấp/ Bệnh Wilson được phẫu thuật ghép gan từ người hiến sống, sử dụng kỹ thuật chuyển vị động mạch lách để thay thế động mạch gan do tổn thương lóc tách nội mạc. Kết quả: Thời gian nối động mạch là 180 phút, kỹ thuật nối tận- tận bằng kính lúp, chỉ prolene 8/0 mũi rời 1 lớp và cắt lách. Siêu âm vận tốc tâm thu tối đa là 43,8 cm/s, sau nối là 35,3 cm/s, trở kháng là 0,77, thời gian tăng tốc tâm thu là 40ms. Tổng thời gian mổ là 820 phút, không có tai biến trong mổ. Người bệnh không có biến chứng sau mổ, thời gian nằm viện là 20 ngày, siêu âm sau mổ tốc độ dòng chảy động mạch gan bình thường, không hẹp, tắc hay huyết khối. Theo dõi xa người bệnh tháng thứ 5, lâm sàng ổn định, siêu âm Doppler động mạch gan Vmax 65 cm/s, RI 0,59, SAT 65ms, không phát hiện hẹp, tắc hay có huyết khối. Đồng thời tìm hiểu y văn về chỉ định, mô tả đặc điểm kỹ thuật và kết quả kỹ thuật này trong ghép gan cho trẻ em. Chuyển vị động mạch lách là lựa chọn khả thi để tái tạo động mạch trong trường hợp động mạch gan của người nhận không thể khâu nối thông thường.
Evaluasi Kebergunaan (Usability) dan Rekomendasi Penggunaan Learning Management System Menggunakan Metode USE di Universitas Negeri Manado
Authors: Runtunuwu Veren Vestirsa , Sumual Herry , Kaparang Daniel Riano 
Published: February 2025

ABSTRAK
Penelitian ini bertujuan untuk mengevaluasi usability rekomendasi penggunaan LMS. Metode yang digunakan ialah kuantitatif dengan pendekatan Structural Equation Model. Evaluasi digunakan dengan mengumpulkan data yang didapat dari hasil kusioner yang dibagikan kepada responden dengan USE Questionnaire. Data ini kemudian dianalisis untuk memperoleh nilai usability berdasarkan aspek uselfullness, satisfaction dan ease of use. Hasil analisis korelasi ganda menunjukan terdapat pengaruh yang sangat kuat anatara variabel usefulness, satisfaction, dan ease of use terhadap minat belajar karena nilai R sebesar 0.957 (semakin mendekati 1). Sedangkan pada pengujian T (partial) menunjukkan adanya pengaruh kemanfaatan Learning Management Sistem terhadap minat belajar mahasiswa serta adanya pengaruh persepsi variabel usefulness, satisfaction, dan ease of use secara simultan (bersama sama) terhadap minat belajar mahasiswa. Namun, tidak ditemukan adanya pengaruh usefulness secara partial terhadap minat belajar mahasiswa.
ABSTRACT
This study aims to evaluate the usability of recommendations for using LMS. The method used is quantitative with a Structural Equation Model approach. Evaluation is used by collecting data obtained from the results of questionnaires distributed to respondents using the USE Questionnaire. This data is then analyzed to obtain a usability value based on the aspects of usefulness, satisfaction and ease of use. The results of the multiple correlation analysis show that there is a very strong influence between the variables usefulness, satisfaction and ease of use on interest in learning because the R value is 0.957 (getting closer to 1). Meanwhile, the T (partial) test shows that there is an influence of the usefulness of the Learning Management System on students' interest in learning as well as the influence of the perception of usefulness, satisfaction and ease of use variables simultaneously (together) on students' interest in learning. However, there was no partial influence of usefulness on students' learning interest.
Penerapan Model Pembelajaran Berbasis Proyek untuk Meningkatkan Hasil Belajar Informatika Siswa Kelas X.1 SMA Negeri 1 Lembean Timur
Authors: Tarigan Andika Vanenta , Wonggo Djafar , Modeong Merriam 
Published: February 2025

ABSTRAK
Tujuan dalam penelitian ini adalah menerapkan model pembelajaran berbasis proyek untuk meningkatkan hasil belajar informatika siswa kelas X.1 SMA Negeri 1 Lembean Timur, sebagai model pembelajaran yang bisa membuat siswa lebih aktif dan termotivasi untuk mengikuti kegiatan belajar. Penelitian ini termasuk Penelitian Tindakan Kelas (PTK) yang bertujuan untuk mengetahui peningkatan hasil belajar siswa. Sampel dalam penelitian ini terdiri dari siawa kelas X.1 SMA Negeri 1 Lembean Timur yang terdiri dari 17 siswa, diantaranya 9 laki-laki dan 8 perempuan. Berdasarkan hasil penelitian dari penerapan model pembelajaran berbasis proyek mata pembelajaran Informatika materi TIK sub local area network (LAN) menunjukkan hasil siklus I yaitu 11 siswa yang tuntas dengan presentase ketuntasan hasil belajar sebesar 64,7% dan pada siklus II terjadi peningkatan hasil belajar siswa yang tuntas yaitu 15 siswa dengan presentase ketuntasan hasil belajar sebesar 88,2% dari jumlah keseluruhan 17 siswa. Kesimpulan pada penelitian ini menunjukkan bahwa penerapan model pembelajran berbasis proyek dapat meningkatkan hasil belajar siswa.
ABSTRACT
This research aims to apply a project-based learning model to improve the informatics learning outcomes of class X.1 students at SMA Negeri 1 Lembean Timur, as a learning model that can make students more active and motivated to take part in learning activities. This research includes Classroom Action Research (PTK) which aims to determine improvements in student learning outcomes. The sample in this study consisted of class X.1 SMA Negeri 1 Lembean Timur consisting of 17 students, including 9 men and 8 women. Based on research results from the application of the project-based learning model for the Informatics learning subject, ICT sub local area network (LAN) material, it shows that the results of cycle I were 11 students who completed with a percentage of complete learning outcomes of 64.7% and in cycle II there was an increase in student learning outcomes. completed, namely 15 students with a percentage of complete learning outcomes of 88.2% of the total number of 17 students. The conclusion of this research shows that the application of a project-based learning model can improve student learning outcomes.
Pengaruh Fasilitas Belajar dan Motivasi Terhadap Prestasi Belajar Siswa Kelas X di SMK Kristen Tombatu
Authors: Esserey Wilhelmina , Paat Wensi Ronald Lesli , Pajung Kebri 
Published: February 2025

ABSTRAK
Tujuan penelitian ini adalah untuk mengetahui ada tidaknya pengaruh fasilitas belajar dan motivasi terhadap prestasi belajar siswa kalas X TJK, X Asisten keperawatan X AKL dan X ATPH (30 responden). Hasil penelitian ini menunjukan bahwa analisis regresi linear berganda diperoleh persamaan Y=80,501 + 0,007x1 + 0,048x2. Dimana fasilitas belajar dan motivasi berpengaruh terhadap prestasi belajar siswa kelas X SMK Kristen Tombatu. Dari hasil korelasi menunjukan nilai r =0,241 membuktikan bahwa pengaruh antara fasilitas belajar dan motivasi terhadap preatasi belajar tergolong kuat. Kemudian untuk Uji F diperoleh Fhitung = 4.296 > Ftabel =3,35. Hasil yang diperoleh menyatakan bahwa ada pengaruh yang signifikan pada fasilitas belajar dan motivasi terhadap preatasi belajar siswa kelas X di SNK Kristen Tombatu. Pengaruh fasilitas belajar (x1) dan Motivasi (x2) siswa berpengaruh terhadap prestasi belajar (Y) sebesar 24% sisanya dipengaruhi oleh factor lain. Kesimpulan penelitian ini adalah fasilitas belajar dan motivasi berpengaruh terdadap prestasi belajar siswa kelas X SMK Kristen Tombatu baik secara simultan maupun parsial.
ABSTRACT
This research aimed to determine whether or not there was an influence of learning facilities and motivation on the learning achievement of students in class X TJK, X Nursing Assistant, X AKL, and X ATPH (30 respondents). The results of this research show that the multiple linear regression analysis obtained the equation Y=80.501 + 0.007x1 + 0.048x2. Where learning facilities and motivation influence the learning achievement of class X students at Tombatu Christian Vocational School. The correlation results show a value of r = 0.241, proving that the influence of learning facilities and motivation on learning achievement is relatively strong. Then for the F test, Fcount = 4,296 > Ftable = 3.35. The results obtained state that there is a significant influence on learning facilities and motivation on the learning achievement of class X students at SNK Kristen Tombatu. The influence of learning facilities (x1) and student motivation (x2) influences learning achievement (Y) by 24%, the remainder is influenced by other factors. This research concludes that learning facilities and motivation influence the learning achievement of class X students at Tombatu Christian Vocational School, both simultaneously and partially.
Pengaruh Model Pembelajaran Blended Learning Terhadap Hasil Belajar Teknologi Jaringan Berbasis Luas (WAN) Siswa TKJ SMK Cokroaminoto Kotamobagu
Authors: Gobel Revandi , Manoppo Christine Takarina Meitty , Liando Olivia Eunike Selvie 
Published: February 2025

ABSTRAK
Tujuan dari penelitian ini untuk mengetahui apakah terdapat Pengaruh model pembelajaran Blended Learning terhadap hasil belajar Teknologi Jaringan Berbasis Luas (WAN) siswa TKJ SMK Cokroaminoto Kotamobagu. Penelitian ini dilaksanakan dengan melibatkan siswa kelas XI Program Keahlian Teknik Komputer dan Jaringan (TKJ) siswa SMK Cokroaminoto Kotamobagu sebagai kelompok eksperimen yang mengikuti pembelajaran dengan model Blended Learning dengan menerapkan PjBL, dan kelompok kontrol yang menerima pembelajaran Problem Based Learning. Metode penelitian yang digunakan adalah metode penelitian deskriptif kuantitatif yang terdiri dari kelompok eksperimen dan kelompok kontrol dengan pemberian Pre-test, Perlakuandan Post-test dengan jumlah sampel 20 orang siswa. Dalam pengolahan data uji normalitas dan homogenitas menggunkanan SPSS Statistics versi 25 dan uji hipotesis statistic dilakukan menggunakan SPSS Statistics versi 25 dengan hasil thitung = 1,86 > ttabel = 1,685954 sehingga H1 diterima dan H0 ditolak. Tetapi dikarenakan hasil dari ttabel dan thitung tidak bedah jauh maka dapat disimpulkan bahwa terdapat perbedaan tetapi tidak signifikan pada skor hasil belajar siswa antara kelas kontrol dan kelas eksperimen.
ABSTRACT
The aim of this research is to find out whether there is an influence of the Blended Learning learning model on the Broad-Based Network Technology (WAN) learning outcomes of TKJ students at Cokroaminoto Vocational School, Kotamobagu. This research was carried out involving class The research method used is a quantitative descriptive research method consisting of an experimental group and a control group by administering a pre-test, treatment and post-test with a sample size of 20 students. In processing the data, normality and homogeneity tests were used using SPSS Statistics version 25 and statistical hypothesis testing was carried out using SPSS Statistics version 25 with the result tcount = 1.86 > ttable = 1.685954 so that H1 was accepted and H0 was rejected. However, because the results from ttable and tcount are not far apart, it can be concluded that there is a difference but not significant in the student learning outcome scores between the control class and the experimental class.
Pengembangan Sistem Informasi Monitoring Perkuliahan Jurusan PTIK Berbasis Web
Authors: Liando Olivia Eunike Selvie , Batmetan Johan Reimon , Lolowang Gloria Inviniti Milania 
Published: February 2025

ABSTRAK
Penelitian ini bertujuan untuk mengembangkan sistem monitoring perkuliahan yang lebih efisien dan relevan untuk jurusan Pendidikan Teknologi Informasi dan Komunikasi (PTIK) di Universitas Negeri Manado. Masalah utama yang dihadapi adalah metode monitoring manual yang tidak hanya memakan waktu, tetapi juga rentan terhadap kesalahan, serta penggunaan Learning Management System (LMS) yang belum optimal dalam memenuhi kebutuhan spesifik jurusan. Sistem yang dikembangkan dirancang dengan fitur utama berupa absensi berbasis QR code yang memungkinkan pencatatan kehadiran mahasiswa secara otomatis dan real-time. Metode penelitian mencakup analisis kebutuhan pengguna, perancangan sistem, serta pengujian untuk memastikan stabilitas dan kemudahan penggunaan. Hasil menunjukkan bahwa sistem ini mengurangi potensi kesalahan pencatatan, dan memberikan akses informasi perkuliahan secara cepat kepada dosen dan mahasiswa. Kesimpulannya, implementasi sistem ini tidak hanya meningkatkan efisiensi operasional tetapi juga berkontribusi pada peningkatan kualitas pembelajaran di jurusan PTIK.
ABSTRACT
This research is to develop a more efficient and relevant monitoring system for the Department of Information and Communication Technology (PTIK) at Manado State University. The main problem faced is a manual monitoring method that is not only time consuming, but keeps rush to sadness, as well as the use of management learning management (LMS) learning management which has not yet been in meeting the needs of the addictive interpreters of the Jurum. The system developed is designed by the main features in the form of QR -based absenteeism code that is to make the recording of student attendance automatically and in real time. Research Methods for Research Analysis of User Needs, System Design, and Examiners for Stability Ensure and Ease of Use. The results show that this system reduces the potential error of adversity, and members of access to information on lecturers and students quickly. Concern, the implementation of this system not only increases efficiency but blindly contributes to improving the quality of learning in the PTIK department.
Rogue Scholar Newsletter February 2025
Authors: Fenner Martin 
Published: February 2025

This is the second issue of the new monthly newsletter from the Rogue Scholar science blog archive. The newsletter reports on new blogs that have joined the platform, important technical updates in Rogue Scholar infrastructure, community updates, and other news relevant to Rogue Scholar users. The big news this month is Rogue Scholar reaching another major milestone: 25,000 archived science blog posts!
Conocimiento, Actitudes y Prácticas acerca del uso de Levonorgestrel en estudiantes de ciencias básicas y tecnología, UNAN-Managua, 2023
Authors: Espinoza Guzmán Geysel Valesca 
Published: February 2025

El objetivo principal de la investigación fue analizar los conocimientos, actitudes, y prácticas sobre Anticoncepción Oral de Emergencia (Levonorgestrel) en estudiantes de primer año de ciencias básicas y tecnología de la UNAN-Managua. El estudio tiene un enfoque cuantitativo, prospectivo, descriptivo, observacional, de corte trasversal. El universo total de estudiantes en el área de ciencias básicas y tecnología fue de 329, con una población total de 130 mujeres, donde se aplicaron los criterios de inclusión y exclusión obteniendo un total de 108 féminas en estudio, con un nivel de educación y estrato socioeconómico heterogéneo, la técnica utilizada fue la encuesta y el instrumento utilizado fue el cuestionario aplicado en Google Form en línea auto administrado. En los resultados obtenidos se logra identificar la variable conocimiento con 55.9%, teniendo un margen de clasificación de 8 preguntas contestadas de forma regular, en la variable de actitud se obtuvo una media de puntuación de 38 punto, clasificadas como actitudes favorables y en la variable de prácticas el 60.8% tienen practicas inadecuadas, evidenciándose el mal uso que implementan los adolescentes y jóvenes del método oral de emergencia. Podemos concluir, que en las variables investigadas se logró identificar conocimientos regular, actitudes favorables y prácticas inadecuadas, evidenciando que, aunque los jóvenes tienen información a disposición y conocen los aspectos básicos del uso de las AOE, al momento del acto sexual, se dejan llevar por su impulsos, omitiendo todos los conocimientos que poseen, manteniendo el mismo margen de riesgo en su practica sexual cotidiana, teniendo o no la información, siendo los jóvenes el grupo más vulnerable.