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All Journal POSITRON JURNAL TEKNOLOGI LINGKUNGAN Indonesian Journal of Applied Linguistics (IJAL) Media Komunikasi Geografi Jurnal sistem informasi, Teknologi informasi dan komputer Jurnal Fisika Unand Jurnal Spektra JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Biology, Medicine, & Natural Product Chemistry Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan Jurnal Ilmiah Pendidikan Pancasila dan Kewarganegaraan KAREBA : Jurnal Ilmu Komunikasi Sistemasi: Jurnal Sistem Informasi Omni-Akuatika INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi LLT Journal: A Journal on Language and Language Teaching Indonesian Journal of English Language Teaching and Applied Linguistics Indonesian Fisheries Research Journal JURNAL PENDIDIKAN TAMBUSAI JEES: Journal of English Educational Study JISIP: Jurnal Ilmu Sosial dan Pendidikan Jurnal Teori dan Aplikasi Fisika Building of Informatics, Technology and Science Jurnal Penelitian dan Pengkajian Ilmu Pendidikan: e-Saintika Journal of English Language Teaching Innovations and Materials (Jeltim) Hermeneutika : Jurnal Ilmu Hukum Jurnal Abdi Insani Ethical Lingua: Journal of Language Teaching and Literature Idealis : Indonesia Journal Information System Jurnal Teknologi Informasi dan Komunikasi Education and Linguistics Knowledge Journal (Edulink) JOLLT Journal of Languages and Language Teaching Journal of Global Sustainable Agriculture Jurnal Bio-Geo Material Dan Energi Empiricism Journal International Journal Software Engineering and Computer Science (IJSECS) Makara Journal of Science Magistrorum et Scholarium: Jurnal Pengabdian Masyarakat Jurnal Pengabdian Masyarakat dan Riset Pendidikan Jurnal Tarreang: Tren Pengabdian Masyarakat Agrokompleks Jurnal Pendidikan Progresif Indonesian Journal of English Language Teaching and Applied Linguistics Jurnal bahasa, sastra, seni, dan pengajarannya
Edi Suharyadi
Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Analisis Sentimen Pengguna Twitter Terhadap Kebijakan Royalti Restoran Dan Kafe Dengan Multinomial Naive Bayes Stephanie Gabriella Wijaya; Suharyadi, Suharyadi
IDEALIS : InDonEsiA journaL Information System Vol. 9 No. 1 (2026): Jurnal IDEALIS Januari 2026
Publisher : Universitas Budi Luhur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36080/idealis.v9i1.3698

Abstract

Kebijakan royalti musik di restoran dan kafe sebagaimana diatur dalam Peraturan Pemerintah Nomor 56 Tahun 2021 menimbulkan beragam respons di masyarakat, khususnya pelaku usaha dan pengguna layanan publik. Media sosial Twitter menjadi ruang utama bagi masyarakat untuk menyampaikan opini dan diskusi terkait kebijakan tersebut. Penelitian ini bertujuan menganalisis sentimen masyarakat terhadap kebijakan royalti di restoran dan kafe pada media sosial Twitter menggunakan metode Naive Bayes Classifier. Data dikumpulkan melalui teknik web scraping dengan memanfaatkan Tweet Harvest dan menghasilkan 1.513 tweet berbahasa Indonesia yang relevan. Pelabelan sentimen dilakukan menggunakan pendekatan lexicon-based ke dalam tiga kelas, yaitu positif, netral, dan negatif. Tahapan preprocessing meliputi data cleaning, tokenisasi, stopword removal, dan stemming menggunakan Sastrawi. Ekstraksi fitur dilakukan dengan metode TF-IDF, sedangkan ketidakseimbangan kelas ditangani menggunakan SMOTE. Optimasi model dilakukan melalui GridSearchCV dengan Stratified 5-Fold Cross Validation. Hasil penelitian menunjukkan bahwa sentimen netral mendominasi sebesar 81,96%, diikuti sentimen negatif sebesar 12,23% dan sentimen positif sebesar 5,82%. Model Multinomial Naive Bayes menghasilkan akurasi sebesar 95% dan F1-score sebesar 95% pada data uji, serta menunjukkan stabilitas yang cukup baik berdasarkan hasil cross validation. Temuan ini menunjukkan bahwa kombinasi Naive Bayes, TF-IDF, SMOTE, dan hyperparameter tuning efektif dalam menganalisis sentimen kebijakan publik berbasis data media sosial
Effect of Solvent Polarity on Extraction Yield, Phytochemical Composition, and Antioxidant Activity of Curcuma xanthorrhiza Roxb. and Moringa oleifera Lam. Azzahra, Vina Octavia; Mardiana, St; Suharyadi, Suharyadi; Sianipar, Rini Juita; Ramadhan, Dwi Sapri
Biology, Medicine, & Natural Product Chemistry Vol 14, No 2 (2025)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2025.142.1273-1284

Abstract

The present study investigated the effect of solvent polarity on extraction yield, phytochemical composition, and antioxidant activity of Curcuma xanthorrhiza Roxb. rhizomes and Moringa oleifera Lam. leaves. Maceration was carried out using ethanol, acetone, ethyl acetate, and n-hexane for 72 hours (1:10 w/v). Extraction yield, total phenolic content (TPC), total flavonoid content (TFC), and DPPH radical scavenging activity were determined. Results demonstrated a clear polarity-dependent trend. Ethanol yielded the highest extract recovery for both species (17.55 ± 0.97% and 22.93 ± 0.65%), while n-hexane showed the lowest yield. Ethanol extracts exhibited the greatest TPC and TFC values, 47.12 mg GAE/g and 6.76 mg QE/g for C. xanthorrhiza, and 25.91 mg GAE/g and 4.67 mg QE/g for M. oleifera, respectively. Correspondingly, ethanol fractions displayed the strongest antioxidant activity with IC50 values of 22.70 and 29.80 mg/mL, indicating an inverse correlation between phenolic load and radical scavenging capacity. The study confirms that solvent polarity is a critical determinant of phytochemical recovery and antioxidant potency. The novelty of this work lies in the first comparative evaluation of C. xanthorrhiza and M. oleifera extracted under identical solvent systems, providing a rational framework for solvent selection in phytopharmaceutical and nutraceutical applications. Further work should isolate and characterize the active antioxidant constituents from the most potent extracts.
EFL teachers’ reasons for selecting instructional materials during the COVID-19 pandemic Suharyadi, Suharyadi; Wulyani, Anik Nunuk
Bahasa dan Seni: Jurnal Bahasa, Sastra, Seni, dan Pengajarannya Vol. 50, No. 1
Publisher : citeus

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Abstract

The COVID-19 pandemic has changed how teachers teach and students learn in the classroom. One of the challenges in the online teaching is that teachers are required to prepare the instructional materials for their students. This study aims at investigating the EFL teachers’ reasons for choosing the instructional materials in the time of the COVID-19 pandemic. By employing a set of questionnaires, this study collected the data from 219 English teachers from various levels of education online via the google form link. The data collection was done for one month starting from 5 May to 5 June 2020. The data were analyzed through a content analysis by identifying, grouping, and categorizing similar and different responses. The results of analysis showed that the EFL teachers have five categories of reasons in selecting the instructional materials in the time of pandemic: the instructional materials should be easy, relevant, simple, attractive, and absent from crime, pornography, and viruses. These results suggest that the EFL teachers make use of these reasons in selecting and developing the instructional materials for their students during and after the pandemic. For future textbook developers, these considerations can be used a reference to develop textbooks which accommodate students’ voices and teachers’ voices during the online teaching and learning activities.
Influence of Mass Variation of Green-Synthesized CoFe2O4/Cdots Catalyst on the Photocatalytic Degradation of Methylene Blue Through Initial Adsorption Mechanism Zalukhu, Aldwin; Deswardani, Frastica; Suharyadi, Edi; Utami, Ranti Widia; Istiqomah, Nurul Imani; Mahardhika, Larrisa Jestha; Azzahro, Siti Fatimah; Altop, Dapfa Farrizo; Oktaviani, Nada
Jurnal Bio-Geo Material Dan Energi Vol. 6 No. 1 (2026): Vol. 6 No. 1 (2026): Journal of Bio-Geo Material and Energy (BiGME), February 2
Publisher : PUI BiGME Universitas Jambi

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Abstract

This study aimed to synthesize and evaluate the photocatalytic performance of CoFe₂O₄/Cdots nanocomposites prepared via green synthesis method using Moringa oleifera leaf extract and watermelon rind waste as eco-friendly precursors. The synthesis involved a co-precipitation process for CoFe₂O₄ formation and a hydrothermal route to produced Cdots, followed by composite fabrication. The materials were characterized using XRD, UV-Vis Spectrophotometer, and VSM analyses to determine their crystalline structure, optical, and magnetic properties. The results showed that the incorporation of Cdots increased the optical band gap (3.15 eV) compared to pure CoFe₂O₄ (2.64 eV) and improved soft magnetic behavior. Photocatalytic tests under UV irradiation using Methylene Blue as a model pollutant revealed a degradation efficiency of 91.9% for CoFe₂O₄/Cdots at an optimum catalyst mass of 0.07 gr, significantly higher than 60,8% achieved by pure CoFe₂O₄. The enhanced performance is attributed to the synergistic interaction between CoFe₂O₄ and Cdots, which promotes charge separation, initial adsorption, and reactive radical generation. These findings indicate that the CoFe₂O₄/Cdots nanocomposite is a promising eco-friendly photocatalyst for wastewater treatment applications.
ANALISIS SENTIMEN KEPUASAN PELANGGAN PADA KOPISHOP TELON COFFEE MENGGUNAKAN METODE TF-IDF BERBASIS ULASAN GOOGLE MAPS DAN GOFOOD Tyas Adi Novianto; Suharyadi, Suharyadi
JURNAL TEKNOLOGI INFORMASI DAN KOMUNIKASI Vol. 17 No. 1 (2026): Maret
Publisher : UNIVERSITAS STEKOM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/jtikp.v17i1.1529

Abstract

Perkembangan industri kopi yang pesat mendorong pelaku usaha untuk memahami tingkat kepuasan pelanggan secara lebih objektif. Salah satu sumber informasi yang dapat dimanfaatkan adalah ulasan pelanggan pada platform digital seperti Google Maps dan GoFood. Penelitian ini bertujuan untuk menganalisis sentimen kepuasan pelanggan terhadap Kopishop Telon Coffee menggunakan metode Term Frequency–Inverse Document Frequency (TF-IDF) dan algoritma Support Vector Machine (SVM). Data yang digunakan berupa 186 ulasan pelanggan yang dikumpulkan dari Google Maps dan GoFood, kemudian dilabeli secara manual ke dalam tiga kelas sentimen, yaitu positif, netral, dan negatif. Tahapan penelitian meliputi pengumpulan data, pra-pemrosesan teks, ekstraksi fitur menggunakan TF-IDF, serta klasifikasi sentimen menggunakan SVM. Hasil ekstraksi fitur menunjukkan bahwa kata “kopi”, “enak”, dan “nyaman” memiliki bobot TF-IDF tertinggi, yang mengindikasikan bahwa kualitas rasa dan kenyamanan tempat menjadi aspek utama yang diperhatikan pelanggan. Evaluasi model SVM menghasilkan akurasi sebesar 86,84%, dengan nilai precision, recall, dan F1-score yang cukup baik, meskipun masih terdapat keterbatasan dalam mengklasifikasikan sentimen minoritas akibat ketidakseimbangan data. Secara keseluruhan, hasil penelitian menunjukkan bahwa mayoritas pelanggan memberikan sentimen positif terhadap Kopishop Telon Coffee. Penelitian ini membuktikan bahwa kombinasi metode TF-IDF dan SVM dapat digunakan secara efektif untuk menganalisis sentimen kepuasan pelanggan berdasarkan ulasan daring dan dapat menjadi dasar evaluasi serta pengambilan keputusan bagi pelaku usaha.
Pengaruh Penambahan Ag Terhadap Struktur Kristal dan Sifat Optik Fe3O4, serta Variasi Massa Nanokomposit Fe3O4/Ag terhadap Karakteristik Kurva Surface Plasmon Resonance Menggunakan Metode Sintesis Hijau Flora Rosdiana Lumbansiantar; Edi Suharyadi; Suprihatin; Posman Manurung
Jurnal Teori dan Aplikasi Fisika Vol. 14 No. 01 (2026): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v14i01.537

Abstract

Surface plasmon resonance (SPR) phenomenon was observed using the Kretschmann configuration with a four-layer structure: prism/Au Thin Film/ Fe3O4/Ag/air, with Fe3O4/Ag nanocomposite mass variation of 0.025; 0.05; 0.075; and 0.1 gram. Fe3O4 which was then added with 100 mM Ag to become Fe3O4/Ag 100 mM nanocomposite was synthesized using green synthesis method, and then characterized by XRD and UV-Vis. XRD results showed the addition of Ag to Fe3O4 does not change the crystal structure of Fe3O4 directly, but causes an increase in crystallite size. UV-Vis results showed the absorbance spectrum shifted to longer wavelengths. Deposition of Au thin layer on the prism side using vacuum evaporator. Fe3O4/Ag was deposited on the Au thin film using spray method. For the initial configuration of  prism/Au Thin Film/air, the SPR angle (θSPR) of 45.67º was obtain with a minimum reflectance (Rmin) of 0.4208. After the addition of Fe3O4/Ag with each mass, the SPR angle (θSPR) shifted to 45.98º; 46.38º; 46.75º; and 46.77º with a minimum reflectance (Rmin) of 0.5645; 0.6977; 0.7239; and 0.7663. The resulting angular shifts were 0.31º; 0.71º; 1.08º; and 1.11º. The results show that the addition of Fe3O4/Ag to the Au thin layer causes a shift in the SPR angle towards a larger incident angle, as well as increasing the minimum reflectance value. The greater the mass of nanocomposite added, the greater the SPR angle shift that occurs.     Keywords: Fe3O4/Ag nanocomposite, green synthesis, surface plasmon resonance (SPR), UV-Vis, XRD.
EFL Teachers’ Problems and Solutions in Teaching English to Students with Intellectual and Developmental Disability Utami, Revita Putri; Suharyadi, Suharyadi; Astuti, Utari Praba
IJELTAL (Indonesian Journal of English Language Teaching and Applied Linguistics) Vol 6, No 1 (2021): Indonesian Journal of English Language Teaching and Applied Linguistics
Publisher : Universitas Islam Negeri Sultan Aji Muhammad Idris Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21093/ijeltal.v6i1.912

Abstract

Sekolah Luar Biasa (SLB) is a school specialized for students with special needs, particularly students with Intellectual and Developmental Disability (IDD). In Indonesia, the government guarantees that they have the same right to study formally and informally; and to get the best teachers in the teaching and learning process. In English language teaching, however, even qualified teachers have problems while teaching English to students with IDD. Despite the urgency to solve the problems faced by teachers who teach English or a foreign language to special needs students, especially IDD, there are only a few articles covering this topic. This study, which uses a descriptive qualitative method, aims at uncovering the problems and solutions of five English teachers in teaching students with IDD in SLB Pembina Tingkat Nasional Bagian C Malang. In order to obtain the needed data, an observation checklist, a field note, and an interview guide were utilized. The findings revealed that problems faced by the teachers were related to teachers’ English proficiency, methods and media used in teaching, and students’ ability in learning. The teachers used different solutions to overcome the problems, but the most common solution was using repetition in teaching and practicing. This solution was used as the students had difficulties in understanding and remembering the lesson. The other solutions used during the teaching and learning process include YouTube videos, English learning application, posters, and BSE.
EFL Teachers’ Problems and Solutions in Teaching English to Students with Intellectual and Developmental Disability Utami, Revita Putri; Suharyadi, Suharyadi; Astuti, Utari Praba
IJELTAL (Indonesian Journal of English Language Teaching and Applied Linguistics) Vol 6, No 1 (2021): Indonesian Journal of English Language Teaching and Applied Linguistics
Publisher : Universitas Islam Negeri Sultan Aji Muhammad Idris Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21093/ijeltal.v6i1.912

Abstract

Sekolah Luar Biasa (SLB) is a school specialized for students with special needs, particularly students with Intellectual and Developmental Disability (IDD). In Indonesia, the government guarantees that they have the same right to study formally and informally; and to get the best teachers in the teaching and learning process. In English language teaching, however, even qualified teachers have problems while teaching English to students with IDD. Despite the urgency to solve the problems faced by teachers who teach English or a foreign language to special needs students, especially IDD, there are only a few articles covering this topic. This study, which uses a descriptive qualitative method, aims at uncovering the problems and solutions of five English teachers in teaching students with IDD in SLB Pembina Tingkat Nasional Bagian C Malang. In order to obtain the needed data, an observation checklist, a field note, and an interview guide were utilized. The findings revealed that problems faced by the teachers were related to teachers’ English proficiency, methods and media used in teaching, and students’ ability in learning. The teachers used different solutions to overcome the problems, but the most common solution was using repetition in teaching and practicing. This solution was used as the students had difficulties in understanding and remembering the lesson. The other solutions used during the teaching and learning process include YouTube videos, English learning application, posters, and BSE.
STUDENTS’ PERCEPTIONS OF PROJECT-BASED LEARNING (PJBL) IN P5 PROJECTS FOR ENHANCING WRITING SKILLS AT ISLAMIC BOARDING SCHOOL Arifin, Syamsul; Anugerahwati, Mirjam; Suharyadi, Suharyadi
EDUCATION AND LINGUISTICS KNOWLEDGE JOURNAL Vol 8 No 1 (2026): Education and Linguistics Knowledge Journal (Edulink)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Islam Kadiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32503/edulink.v8i1.8687

Abstract

This study aims to explore the perceptions of students toward Project-Based Learning (PjBL) in P5 projects for enhancing writing skills at Islamic Boarding Schools (IBS). It seeks to address key questions about students’ experiences, the impact of PjBL on writing development, the challenges encountered, and strategies for improvement. Adopting a convergent parallel mixed methods design, data were collected using an online questionnaire and semi-structured interviews. The questionnaire involved 84 students from As-Syifa Islamic Boarding School Sagalaherang Subang, while 12 participants, purposefully selected based on English proficiency (basic, intermediate, advanced) and willingness to participate, were interviewed for in-depth insights. Quantitative data were analyzed descriptively, and qualitative data were coded thematically. Findings reveal that PjBL in P5 projects positively influences students’ writing skills through real-world applications, collaborative tasks, and engaging activities. However, challenges such as time constraints, limited vocabulary, and group dynamics were noted. To enhance PjBL outcomes, students proposed extending time for writing tasks, providing immediate feedback, and integrating digital tools for autonomous learning support.
Co-Authors - Heriansyah, - - Mustawarman, - - Mutmainnah, - A.A. Ketut Agung Cahyawan W Abdul Hakim Prima Yuniarto Abu Khalid Rivai Ade Iriani Adriyanto Juliastomo Gundo Agnesia, Wega Dhea Agustin, Ayu Chandra Agusutrisno Agusutrisno, Agusutrisno Al-Ansori, Muhammad Abdul Latif Alfiazh, Andini Tria Alhusna, Indra Sundara Altop, Dapfa Farrizo Anik Nunuk Wulyani Arditya Prayogi Armitasari, Linda Asep Awaludin, Asep Azzahra, Vina Octavia Azzahro, Siti Fatimah BUDI SETIADI DARYONO Chairani, Nur Julianti Dwi Damanik, Lina Aftiani DEWI SARTIKA Dewi, Priyantini Ekaning Dewanti Laksmi El Khoiri, Niamika Erni Marlina, Erni Evi Maria Evynurul Laily Zen Fakhrillah, Agvy Rena Farkan, Mochammad Ferni Malega Flora Rosdiana Lumbansiantar Frastica Deswardani Gunadi Harry Sulistyo Hafied Cangara, Hafied Harianto, Muhammad Bayu Aji Putra Heri Kiswanto Heri Kiswanto Heripan, Heripan Hidayati, Yustina I Putu Tedy Indrayana Ihsan, Iif Miftahul Ilham Ilham Imam Prayogo Pujiono Indrawati, Dewi Miska Irwan Sembiring Istiqomah, Nurul Imani Ivone, Fransisca Maria Jun Harbi Kamsul Abraha Kristiany, Maria Gorety Eny Kuat Ismanto Kusumamawarni, Deaseptia Nirmala Laisina, Edwin Mahardhika, Larrisa Jestha Malega, Ferni Malega, Ferni Mangalla, Bileam Mardiana, St Mardiyanto Mardiyanto Margono Margono Milantara, Noril Mirjam Anugerahwati Mudasir Mudasir Muhammad Hanif Mulyono, Mugi Nasirin, Nasirin Nasrullah Nasrullah Novela, Monica Nugraha, Bayu Adi Nur Aji Wibowo Nurul Imani Istiqomah Nurwadi, Nurul Fadilah Oktaviani, Nada Parlina, Iin Posman Manurung Prabandaru, Lila Prabowo, Guntur Prima Widayani Putra, Angkasa Rahardian, Renaldy Baptista Rahayu, Dwi Indah Ramadhan, Dwi Sapri Ramadiansyah, Febry Rheido, Gestar Riyanto, Didik Rohmah, Syifa Romantik, Romi Romi Novriadi Rony, Zahara Tussoleha Rosyidah, Umniyah Juman Safitri, Mega Said, Dian Riani Samsu Harapan, Sri Budiani Samsuardi Samsuardi, Samsuardi Samsuharapan, Sri Budiani Sari, Emi Kurnia Satoshi Iwata Sektiana, Sinar Pagi Shirly Rizki Kusumaningrum Sianipar, Rini Juita Sintha Tresnadewi Siti Muniroh Sri Andreani Sri Budiani Stephanie Gabriella Wijaya Suhardi, Muhammad Tegar Alif Suprihatin Susilo, Dinantari Susilo, Sandy Pria Nanda Syahirul Alim Syahrul R, Syahrul Syamsul Arifin Syaputra, Affandi Syukron, Akhmad Aufa Tahir, Asman Bin Mohd Takeshi Kato Theopillus J. H. Wellem Tintien Koerniawati Tjoa, Stanley Evander Emeltan Tresnadewi, Shinta Tyas Adi Novianto Utami, Ranti Widia Utami, Revita Putri Utari Praba Astuti Wake, Yohana Dhoe Yani, Achmad Yazid Basthomi Yessica Nataliani Yulizar Yulizar Yumna, Asy Syafa’ Yuwono, Henri Zalukhu, Aldwin