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Ratna Sari Dewi
Universitas Negeri Medan
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Diskusi tentang Integrasi Generative AI dalam Pembelajaran Perguruan Tinggi: Panduan dari Direktorat Pembelajaran dan Kemahasiswaan di lingkungan LEMKOMINDO Herlina, Herlina; Tampubolon, Khairuddin; Elazhari, Elazhari; Dewi, Ratna Sari; Lubis, Reza Hanafi; Hutagaol, Jarungjung; Hastalona, Dina
Journal Liaison Academia and Society Vol 4, No 4: Desember 2024
Publisher : Lembaga Komunikasi dan Informasi Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58939/j-las.v4i4.826

Abstract

Generative Artificial Intelligence (Generative AI) adalah teknologi yang mampu menghasilkan konten baru berdasarkan data yang telah dipelajari. Dalam konteks pembelajaran di perguruan tinggi, teknologi ini memiliki potensi besar untuk meningkatkan efektivitas, kreativitas, dan personalisasi proses belajar. kegiatan ini membahas cara mengintegrasikan Generative AI ke dalam sistem pendidikan perguruan tinggi dengan panduan dari Direktorat Pembelajaran dan Kemahasiswaan di lingkungan LEMKOMINDO. Artikel ini mencakup analisis manfaat, tantangan, dan strategi implementasi yang sesuai dengan kebijakan nasional dan kebutuhan institusi. Kegiatan ini dilaksanakan secara daring dengan peserta dosen dan mahasiswa. Hasil kegiatan ini adalah Dosen dan mahasiswa dapat memahami etika dan aturan pemanfaatan AI dalam aktivitas institusi. Generative AI memiliki potensi besar untuk merevolusi pembelajaran di perguruan tinggi. Namun, keberhasilannya sangat bergantung pada kebijakan yang matang, pelatihan yang memadai, dan infrastruktur yang mendukung. Direktorat Pembelajaran dan Kemahasiswaan di lingkungan LEMKOMINDO diharapkan dapat menjadi motor penggerak dalam memastikan teknologi ini diadopsi secara efektif dan bertanggung jawab.
PENERAPAN TEKNOLOGI MESIN PENCAMPUR PAKAN TERNAK RUMINANSIA UNTUK MENINGKATKAN KUALITAS SUSU KAMBING PERAH DALAM UPAYA PENCEGAHAN STUNTING DI DESA PASAR BARU KECAMATAN TELUK MENGKUDU KABUPATEN SERDANG BERDAGAI Damanik, Marini; Koto, Indra; Pratiwi, Alfira Julian; Sari, Sri Adelila; Ridho, Dimas; Riris, Ida Duma; Dewi, Ratna Sari; Kurniawan, Ekin Dwi Arif
JURNAL PENGABDIAN KEPADA MASYARAKAT Vol. 31 No. 3 (2025): JULI-SEPTEMBER
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkm.v31i3.67759

Abstract

Peningkatan kualitas pakan ternak ruminansia menjadi salah satu faktor penting dalam mendukung produktivitas susu kambing perah, yang secara tidak langsung berkontribusi dalam dunia kesehatan sebagai upaya pencegahan stunting melalui pemenuhan gizi keluarga. Namun, mitra peternak di Desa Pasar Baru, Kecamatan Teluk Mengkudu, Kabupaten Serdang Bedagai masih menghadapi kendala dalam proses pencampuran pakan secara manual yang memakan waktu lama dan menghasilkan pakan yang tidak homogen. Kegiatan pengabdian ini bertujuan untuk memberikan solusi melalui penerapan teknologi tepat guna berupa mesin pencampur pakan serta pelatihan manajemen usaha. Metode yang digunakan meliputi pendidikan, pelatihan, dan praktik langsung. Hasil kegiatan menunjukkan bahwa mitra mengalami peningkatan efisiensi kerja, dengan waktu pencampuran pakan yang berkurang signifikan, serta peningkatan homogenitas pakan yang berdampak positif terhadap kualitas dan kuantitas susu kambing. Selain itu, pelatihan pengemasan dan pemasaran turut mendukung penguatan aspek kewirausahaan mitra. Kegiatan ini memberikan dampak nyata dan berkelanjutan dalam peningkatan produktivitas ternak serta ekonomi rumah tangga peternak.
Effectiveness of Metanil Yellow Adsorption Using CTAB-Modified Activated Carbon from Areca Nut Husk (Areca catechu L.) Sri Rahayu; Ratna Sari Dewi
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68714

Abstract

This study investigates the adsorption efficiency of Metanil Yellow using activated carbon derived from areca nut husk (Areca catechu L.), which was chemically activated with KOH and modified with CTAB surfactant. The adsorbent was characterized using FTIR and UV-Vis spectroscopy to identify functional groups and determine optimum adsorption parameters. FTIR analysis confirmed the presence of functional groups such as –CH₂, –C–N, and –N⁺(CH₃)₃, indicating successful surface modification. UV-Vis analysis showed that the maximum adsorption occurred at a wavelength of 494 nm. The optimum conditions were achieved at an adsorbent mass of 1.5 g, dye concentration of 15 ppm, and contact time of 60 minutes, with adsorption efficiency reaching over 97%. These findings suggest that CTAB-modified areca nut husk activated carbon has strong potential as an effective and low-cost adsorbent for removing dyes from wastewater.
Adsorption of Metanil Yellow Dye with Sugarcane Bagasse (Saccharum offinarum L.) Activated Carbon Modified with Cetyl Trimethyl Ammonium Bromide (CTAB) Surfactant Sasi Kirana; Ratna Sari Dewi
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68715

Abstract

Environmental pollution caused by textile industry wastewater containing synthetic dyes such as Metanil Yellow has become a serious concern due to its carcinogenic nature. This study aims to determine the adsorption capacity of activated carbon derived from sugarcane bagasse waste (Saccharum officinarum L.), which was activated using Potassium Hydroxide (KOH) and modified with the cationic surfactant Cetyl Trimethyl Ammonium Bromide (CTAB). The activated carbon was produced through carbonization at 500 °C for 2 minutes, followed by chemical activation using 5N KOH and surface modification with CTAB. FTIR characterization showed spectral changes with the appearance of new functional groups such as –CH₂ vibrations (2961 and 2849 cm⁻¹), –C–N (1020 cm⁻¹), and quaternary ammonium –N⁺(CH₃)₃ (1470 cm⁻¹), indicating successful interaction of CTAB molecules on the carbon surface. The adsorption results showed that optimum conditions were achieved at an adsorbent mass of 1.5 grams, Metanil Yellow concentration of 25 ppm, and a contact time of 30 minutes, with an adsorption efficiency of 94%.
Penguatan Kompetensi Praktis Mahasiswa Pendidikan Biologi melalui Pelatihan Pembuatan Filter Air Sederhana Dimas Ridho; Ratna Sari Dewi; Lenni Khotimah Harahap; Aldo Geo Frengky Saragih; Anggun Maharani; Delima Sianturi; Elsa Elperida Pandiangan; Monalisa Situmorang; Mei Sufi Anisa Sibarani; Wiranda Hasibuan
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 3 (2025): Desember : JURRIMIPA: Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i3.6849

Abstract

Clean water is a fundamental necessity; however, many regions still struggle to access it due to contamination by suspended particles, organic matter, and harmful microorganisms. This activity aims to strengthen the practical competence of Biology Education students at Universitas Negeri Medan through training in making simple water filters. The training was conducted through demonstrations and simulations using turbid water from the Tembung River as a sample. The filter was constructed from readily available materials such as used plastic bottles, cotton, tissue, sand, small gravel, and palm fiber arranged in layers. The results showed that the filter effectively reduced water turbidity and enhanced students’ skills in clean water treatment technology. The training also encouraged students to develop 21st-century skills such as critical thinking, problem-solving, and collaboration, while preparing them as future educators capable of raising community awareness about the importance of maintaining water quality. Therefore, this training has the potential to be developed as an applicative environmental education model that contributes positively to clean water provision.
The Influence of the Discovery Learning Model Assisted by Kahoot Media on Learning Outcomes Karmina, Putri; Dewi, Ratna Sari
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol. 7 No. 2 (2025): OCTOBER 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study examined the effect of the Discovery Learning model assisted by Kahoot media on students' activities and learning outcomes on the topic of atomic structure. This study involved students of class X IPA SMA IT Jabal Noor Medan, with purposive sampling selecting class X PSP B as the experimental class (Discovery Learning with Kahoot) and class X PSP A as the control class (conventional learning). The test and non-test instruments used were valid, and the data met the assumptions of normality and homogeneity. The results showed that the experimental class achieved a higher average activity score (87.6) than the control class (76), with a significant difference (t count = 6.305 > t table = 2.023). The N-Gain score of the experimental class (0.83) also exceeded the N-Gain score of the control class (0.75). These findings indicate that the Discovery Learning model assisted by Kahoot is effective in increasing students' activities and learning outcomes in studying atomic structure.
Co-Authors Abdul Mutholib Aldo Geo Frengky Saragih Ananda, Zhafira Dwika Anggun Maharani Anni Anggraeni Ari Hardianto Boston Sidabutar Damanik, Marini Delima Sianturi Dimas Ridho Dina Hastalona Elazhari, Elazhari Elsa Elperida Pandiangan Hafni Indriati Nasution Herlina Herlina Hesein H. Bahti Hilda Junanda Br. Harahap Hutagaol, Jarungjung Ida Duma Riris Indra Koto Karmina, Putri Khairuddin Tampubolon Kurniawan, Ekin Dwi Arif Lenni Khotimah harahap Lisnawaty Simatupang Mei Sufi Anisa Sibarani Monalisa Situmorang Muhammad Yusuf Nabillah, Ghoiriah Pratiwi, Alfira Julian Reza Hanafi Lubis Samosir, Sri Rezeki Sasi Kirana Simatupang, Lisnawati Sri Adelila Sari SRI RAHAYU Wiranda Hasibuan