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GeoGebra-Assisted Problem-Based Learning: Enhancing Students’ Mathematical Problem-Solving Ability Putra, Beni Yusepa Ginanjar Putra; Fitria, Audia Nurul; Rahman, Taufik; Rosita, Neneng Tita
Journal of Mathematics Instruction, Social Research and Opinion Vol. 5 No. 1 (2026): March
Publisher : MASI Mandiri Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58421/misro.v5i1.1183

Abstract

Mathematical problem-solving ability is a crucial competence for students, yet evidence suggests it remains generally low. To address this issue, this study implements GeoGebra-assisted Problem-Based Learning (PBL-GeoG) to enhance students' mathematical problem-solving skills. Using a quantitative approach with a quasi-experimental non-equivalent control group design, the research involved eighth-grade students at a public junior high school in West Bandung Regency during the 2024-2025 academic year. Two classes were selected as samples: class VIII-E as the experimental group receiving the PBL-Geog model and class VIII-C as the control group receiving direct instruction (DI). Data were collected through a validated mathematical problem-solving test and analyzed using IBM SPSS Statistics 23. The results of the independent samples t-test showed a significance value of 0.000 (  < 0.05). The findings conclude that the improvement in mathematical problem-solving skills among students taught with the GeoGebra-assisted Problem-Based Learning model is significantly higher than that of students taught through direct instruction.
Perlindungan Hukum dan Risiko Investasi Terhadap Pemodal dalam Securities Crowdfunding Syariah di Platform Shafiq Sholatiah, Lathifah; Rahman, Taufik; Rosidah, Aimmatur
Jurnal Hukum Ekonomi Syariah Vol. 8 No. 1 (2025)
Publisher : Prodi Hukum Ekonomi Syariah Fakultas Agama Islam, Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/jhes.v8i1.25489

Abstract

Perlindungan hukum dan risiko investasi dalam Securitieas Crowdfunding Syariah di Indonesia telah menjadi fokus perhatian dalam beberapa tahun terakhir, penelitian ini membahas mengenai perlindungan hukum terhadap pemodal dan beberapa risiko investasi dalam Securities Crowdfunding Syariah. Securities crowdfunding adalah suatu metode penggalangan dana melalui program patungan yang dilakukan oleh pemilik suatu perusahaan atau perusahaan untuk memulai atau mengembangkan usaha. Melihat perkembangan UMKM dan startup yang semakin pesat di Indonesia, Securities Crowdfunding hadir untuk membantu pendanaan. Pertumbuhan Crowdfunding di Indonesia sendiri dimulai dari tahun 2012 dan terus berkembang hingga platform Securities Crowdfunding Syariah pertama di Indonesia yaitu Shafiq.id. Namun, ditemukan beberapa keluhan atas keterlambatan investasi sukuk pada PT. Terra Energi Prima dalam 2 tahun. Maka dari itu, penulis berusaha mengulas sejauh mana para pihak yang memiliki otoritas dalam mengembangkan peraturan maupun perlindungan hukum atas pemodal dalam securities crowdfunding syariah ini. Penelitian ini menggunakan penelitian pustaka dan melihat peraturan OJK untuk mengidentifikasi isu hukum dengan menjadi bahan hukum primer dan sekunder. Hasil dari menelitian ini, ditemukan bahwa belum adanya standarisasi khusus platform dalam keterbukaan informasi terhadap pemodal. Serta terkait batasan yang jelas mengenai SCF syariah dalam POJK dan Fatwa DSN MUI, yang mana kita ketahui bahwa 2 Lembaga tersebut memiliki kewenangan atas peraturan Securities Crowdfunding.
Antioxidant Activity, Total Phenolic and Flavonoid Content, and Metabolite Profiling of Kalanchoe Ceratophylla Haw. Leaf Ethanol Extract Luthfiyanti, Rohmah; Elya, Berna; Hanafi, Muhammad; Manalu, Lamhot Parulian; Maryana, Erma; Rahman, Taufik
Molekul Vol 21 No 1 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.1.17066

Abstract

ABSTRACT. Kalanchoe ceratophylla Haw. is a species from the Crassulaceae genus known for its various pharmacological benefits, including antioxidant and antidiabetic effects, due to the high contents of flavonoids, tannins, and other phenolic compounds. This study aims to determine the antioxidant activity, total phenolic and flavonoid content, and metabolite profiling of ethanol extracts from K. ceratophylla Haw. leaves. The study utilized K. ceratophylla Haw. leaves, which were pre-identified and authenticated. Extraction was performed using maceration with 70% and 95% ethanol as solvents. The leaves were dried at 40 °C and freeze-dried at -20 °C to -30 °C. The metabolite profiles of the extracts were analyzed using high-resolution mass spectrometry (LC-HRMS) and gas chromatography-mass spectrometry (GC-MS). The HR-MS and GC-MS analyses confirmed the presence of antioxidants, flavonoids, and phenolics in the extract. The findings indicate that the drying method and solvent type significantly influence the total phenolic and flavonoid content and antioxidant activity. The total phenolic content varied from 1.37±0.59 to 5.23±0.87 mg GAE/mL extract, the total flavonoid content varied from 4.26±0.05 to 12.33±0.19 mg QE/g extract, and the antioxidant activity varied from 1.07±0.04 to 3.03±0.18 mg/mL. Based on these results, the ethanol extract of K. ceratophylla Haw. leaves demonstrate significant potential as a source for medicinal applications. The optimal extraction condition in this study was maceration with 95% ethanol, followed by freeze-drying, which produced the highest levels of antioxidant and flavonoid content. Future research should investigate the clinical implications and potential pharmaceutical formulations derived from K. ceratophylla Haw. Keywords: Antioxidants, K. ceratophylla Haw. leaf extracts, metabolite profiling, total flavonoids, total phenolics
IoT-enabled digital twin with renewable energy for sustainable mudless eel aquaculture Ferdiansyah, Muhammad; Mariya, Lika; Rahman, Taufik; Dwiono, Sugeng
Indonesian Journal of Electrical Engineering and Computer Science Vol 41, No 3: March 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v41.i3.pp912-923

Abstract

This research develops and tests a digital twin (DT)-based smart aquaculture system for mud-free eel farming through the integration of IoT sensing, artificial intelligence (AI)-based prediction, edge computing, and solar energy-based automation. The approach used is experimental systems engineering, which includes system design, hardware and software implementation, virtual replication, and physical-digital two-way synchronization. The system utilizes ESP32-based pH, temperature, dissolved oxygen (DO), ammonia (NH₃), and turbidity sensors, MQTT communication, and Raspberry Pi edge computing. Water quality prediction is performed using long short-term memory (LSTM) and random forest regression. The dataset consists of 30 days of real-time data covering water quality, actuator activity (aerator, pump, feeder), and energy production and consumption by IoT sensors and energy meters. Results show that LSTM excels by R² = 0.94; RMSE = 0.14; MAPE <5% and synchronization latency <1.5 seconds. Solar energy integration reduces energy consumption by 54 67%, whilst automation increases eel survival rate by 78% to 91%. The novelty of this research lies in the first integrated implementation of DT, AIoT, and solar energy-based automation in mud-free eel farming. The proposed framework provides a precise, scalable, and sustainable solution for the development of modern aquaculture.
Co-Authors Abdul Gofur Abdul Rofik, Abdul Ade Nurman Saputra Adi Rahmat Adyan, M. Audi Afrianto, Afrianto Ahmad Sahroni, Abdul ahmad yani Akmali, Raga Ziqri Alfan Khudori Alfi Azizah Amalia, Olinda Rizky Amka, Amka Ananda Bagus Pramastya Andi Andrean Maulana Putra Anggara, Deffri Anisah Indriati, Anisah Annie Satriani Achwani Annisa, Rifaul Anthony Anggrawan Aprianto, Qori Ari Widodo Ariyandi Batubara, Ariyandi Arman, Feti Aryo Tunjung Kusumo atik suprapti Aulya, Nur Hafizatun Awati Darmana, Feni Ayu Citra Dewi Ayuni, Baiq Annisa Sulistia Azizah, Ghina Bakhtiar Rifai, Bakhtiar Batubara, Nadhira Dafikh Beni Yusepa Ginanjar Putra Berna Elya Buya Ibrahim Cahyadi, Septian Cendikiawan, M Irfan Chairudin, Muhammad Rio Cita Tresnawati, Cita Dahlia Fisher Damayanti, Anggia Fitri Dani Mardiyana Dedy Kurniawan Dewi Imelda Roesma Diana Rochintaniawati Djoa, Dominikus Djago Dwi Agus Riyanto Dwi Feriyanto Dwiguna, Kristiadi Efendy, Noor Ersu, Aulia Padhila Ervian Dwi Anggara Eryani, Trisna Waty Riza Fajri Hidayat, Fajri Farach, Nurul Fathimatuzzahra, Qeisha Fathurrahman Fathurrahman Fatwa Aulia Rahman Fauzania, Salsa Fauziah, Karlita Vaulin Fauziah, Karyna Febrianti, Mariska Febriyani, Wulida Khomsah Felix Wuryo Handono Fitria, Audia Nurul Fitriah, Afifah Fitriana Rahmawati Fitriya, Fitriya Frastya, Ayu Linda Giatika Chrisnawati Giovanni Maria Vianney Tobia Mariatmojo Gustika, Fina Gustin, Nesha Asmilia H. A., Haliza Amera Hadi Candra, Tri Hafis Nurdin Hana Tasyia, Nona Haris Munandar Hasan Hariri Hasanah Hasbullah Hasbullah Hayati, Annida Putri Helmi, Haidar Herman Kuswanto Herman Kuswanto Herman Kuswanto, Herman Hermawan, Vevi Hidayat, Kautsar Imam Ichtiari, Atina Rahmah Ida Ayu Oka Suwati Sideman Idris Idris, Fahmi Ihsan, Dzul Irsyadul Fikri Ihsan, Saepul Irfan Maulana Islam, M. Syahid Ismawati, Tuti Jayawarsa, A.A. Ketut Jeki Saputra Jufri Jufri Juliwis Kardi Jusep Saputra, Jusep Karimi, Amir Kartini, Srikandi Ayu Khairunisa, Fadia Khairunnisa, Zahra Syafira Khofani, Tanfidia Eka Kusnadi Kusuma, Rendra Kusumo, Aryo Tunjung Lailiya, Farhah Lamhot Parulian Manalu, Lamhot Parulian Lantun Paradhita Dewanti Leny Rudihartati Lestari, Wiwit Yuli Lidia Olga Lilit Rusyati Lingga Wijaya, Harma Oktafia Maharani, Dhea Tinde Fitriana Maharani, Ega Adinda Putri Mahfuzah, Siti Mahmudi, Muhammad Zaki Mairawita Mairawita, Mairawita Mariya, Lika Marliani, Leni Maryana, Erma Maswinda, Maswinda Maulida, Azalia Mawadatul Maulidah Mawaddah, Putri Afifah Mayasti, Nur Kartika Indah Mazrur, Mazrur Meli Meli, Meli Mildawati Mr Sjaeful Anwar Muarif, M. Ari Mubiar Agustin Muhammad Ferdiansyah Muhammad Ferdiansyah, Muhammad Muhammad Hanafi Muhammad Hasan Basri muhammad qomaruddin Muhammad Qomaruddin Muhammad Ridha Muhammad Ulin Nuha Mukhnil, Nur Fitriya Isnaini Muslim Muslim Muzammil, Azriel Ahmad Nadiyah Hidayati Nahdiyati, Kartika Nanang Winarno Nehe, Wahyuni Savitri Neneng Tita Rosita, Neneng Tita Nibras, Iqbaluz Zain Noviana, Febi Nur Alfian, Calvin Nur Aminudin Nuraisyah, Winda Nur’Azizah, Yuni Nurhayani nurhayani Nurjhani, Mimin Nurlaila, Mila Oei, Selviana Oktoviyana, Winstin Paltep, Jefelson M. Pamungkas, Evan Tri Panca Saputra, Elin Parsaoran Siahaan Pertiwi, Lola Pipiet Mutiara Pramastya, Ananda Bagus Pringgo Kusuma Dwi Noor Yadi Putra Priyono Priyono Putri, Dilla Febriana Eka Putri, Eky Elvira Abillah Rafi, Arga Putra Rahmah, Eirvina Rahmanaufal, Fatta Rahmanaufal Rahmawaty, Dede Ayu Ramadani, Octavia Nila Ramdani, Muhammad Farhan Raudah Riandi Riandi Riandi Ridha, Fabrobi Ridwan, Muhammad K. Rifqy Muzhaky Adha rofiqi, budiyana Rohmah Luthfiyanti, Rohmah Rosidah, Aimmatur Rozen, Ilham Safrina, Lina Salman Alfarisi Salimu Salmiah, Baiq Himayatussifa Sapraji, Sapraji Saputra, Haikal Fulvian Saputro, Achmat Yulyadi Sartika, Diana Satrianansyah, Satrianansyah Senjani, Ratu Shafara, Dona Sholatiah, Lathifah Shulkhah, Shulkhah Sihombing, Rizky Agassy Simamora, Ellyne Addelyna Siregar, Shopiah Dhuha Siti Khudaifanny Dasa Febrianti Asna Putri Siti Nurajizah siti, sitirodiyahawaliyah Sobari, Irwan Agus Sofronia, Corazon Solfiyeni Solfiyeni Solihat, Ihat Stelladarifa, Laurent Elizabeth Subhi, M. Sugeng Dwiono Sukamto, Anton Sumarna Sumarna Sumarna Sumarna Sunyono - - Supiyani, Supiyani Suriati, Suriati Surtikanti Hertien Koosbandiah, Surtikanti Suswandi, Suswandi Suwandi, Tri Syachrofi, Muhammad Syaiful Bachri Syayyadi, Achmad Syifa Az Zahra S’adah, Rizki Taufik, Leo Muhammad Teguh Rahmat Zaini Thaibah, Hayatun Tri Nurhayati, Maria Nelly Ulfiyah, Ainun Ridha Ulzanah, Sifa Vera Pujani Wahyuni, Dinni Wardoyo, Rifqi Choiri Wicaksono, Garda Arif Yassierli Yassierli, Yassierli Yatim, Siti Ainor Mohd Yomi Romlah, Oom Yudianor, Zahwa Ramadhani Zahidah Zahidah, Zahidah Zaid Sulaiman Zanah, Nurul Fatihal Zulfikri