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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics JURNAL FISIKA JOURNAL ONLINE OF PHYSICS JPSE (Journal of Physical Science and Engineering) INDONESIAN JOURNAL OF APPLIED PHYSICS Journal of Physics and Its Applications JURNAL EKSAKTA PENDIDIKAN (JEP) KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA JURNAL PENDIDIKAN TAMBUSAI GERVASI: Jurnal Pengabdian kepada Masyarakat Kappa Journal Inovasi Pendidikan: Jurnal Pendidikan Pelita Eksakta Gravitasi: Jurnal Pendidikan Fisika dan Sains Jurnal ABDINUS : Jurnal Pengabdian Nusantara Jurnal Fisika dan Terapannya PAKAR Pendidikan Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika JRFES Journal of Climate Change Society Jurnal Lingkungan Almuslim Uranus: Jurnal Ilmiah Teknik Elektro, Sains dan Informatika Journal of Experimental and Applied Physics
Letmi Dwiridal
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Design of Biogas Reactor as a Sustainable Energy Source in Pauh Sub-District Padang, West Sumatra Ramli, Ramli; Dwiridal, Letmi
Pelita Eksakta Vol 1 No 2 (2018): Pelita Eksakta Vol. 1 No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol1-iss02/26

Abstract

Cow dung waste in Pauh sub-district is widely available. Only partly used as a traditional fertilizer. In fact, the utilization of cow dung is one of the alternative sources of renewable energy. Although biogas technology is not something new in Indonesia, the obstacles faced by farmers are their lack of knowledge about processing cow dung into biogas and making of biogas reactors. Community service has been undertaken to provide knowledge through guidance and counseling methods to farmers about biogas, biogas reactor manufacturing and technology, and the advantages of biogas reactors, both in terms of economic and environmental values. Stages of the implementation of the activities; 1). Provide guidance and counseling to farmers about biogas and how to manufacture biogas reactor, 2). Provide guidance and counseling about the safety of biogas reactors, 3). Conduct periodic monitoring of farmer groups that are partners to the continuity and continuity of activities. The result of the activity is the availability of biogas reactor in farmer group in Pauh sub-district. The fermentation process to produce biogas in the reactor is approximately 3 weeks. Biogas reactors are built easy to make and cheap.
The Role of Electronic Student Worksheets Based on Guided Inquiry Model to Facilitate Critical Thinking Skills: A Systematic Literature Review Mufid, Muthia; Hufri, Hufri; Dwiridal, Letmi; Emiliannur, Emiliannur
Jurnal Pendidikan Tambusai Vol. 10 No. 1 (2026)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v10i1.36361

Abstract

Untuk mendukung kemampuan berpikir kritis sebagai kompetensi inti abad ke-21, studi ini bertujuan untuk secara menyeluruh meneliti fungsi model penyelidikan terbimbing dalam Lembar Kerja peserta didik, khususnya dalam bentuk elektronik. Dengan bantuan instruktur sebagai fasilitator, model penyelidikan terbimbing menekankan proses investigasi terorganisir yang memungkinkan siswa untuk secara aktif mengajukan masalah, merumuskan hipotesis, merencanakan dan melaksanakan eksperimen, menganalisis, dan menarik kesimpulan yang didukung oleh data. Penelitian ini menggunakan metode Systematic Literature Review. Menurut temuan tinjauan pustaka, lembar kerja elektronik berbasis penyelidikan terbimbing telah terbukti sah, bermanfaat. Oleh karena itu, menggabungkan teknologi digital ke dalam lembar kerja elektronik berbasis penyelidikan terbimbing merupakan cara yang tepat dan kreatif untuk memfasilitasi kemampuan berpikir kritis peserta didik di era pendidikan saat ini. Berdasarkan hasil tinjauan sistematis terhadap 15 artikel, ditemukan konsistensi bahwa model pembelajaran aktif seperti inkuiri terbimbing mampu memfasilitasi indikator kemampuan berpikir kritis peserta didik.
Identification Of Changes In Magnetic Clay Mineral Lattice Due To Batik Fabric Dyeing Process Using X-Ray Diffraction Mardayani, Reza Sri; Rifai, Hamidi; Dwiridal, Letmi; Akmam, Akmam; Mufit, Fatni
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 2 (2022): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i2.59344

Abstract

Clay in West Sumatra has been developed as an industrial material, one of which is a natural dye for batik. The use of clay as a natural dye was previously known to have magnetic minerals contained in clay so as to produce color and resistance to fabrics. Currently, no one has investigated the types of magnetic minerals found in clay and their effect on color resistance in batik cloth, so this study aims to determine the types of magnetic minerals in clay and their effect on color resistance in batik cloth. Clay samples were taken from two areas in West Sumatra, namely Pesisir Selatan and Sijunjung. Samples were characterized from the extraction of clay using X-Ray Diffraction, where measurements were taken before and after the dyeing process on the fabric. The results showed that the types of magnetic minerals found in the clay before and after dyeing the fabric were Maghemite. In addition, the non-magnetic mineral found in clay is Quartz. The color resistance test on the CL-SPPS-210314-2 fabric sample did not change color, on the contrary, the CL-PSBSJJ-210421 fabric sample experienced quite a change from the original color of the fabric or before washing. 
Co-Authors - Hamdi Abda Abda Aditio, Rama Ahmad Fajrin Ahmad Fauzi Ahmad Fauzi Akmam Akmam Akmam Amali Putra Amirullah, Fajar Fikri Andini, Ulvia Sepra Andriani, Welli Annisa Rahma Jelita Asrizal Delima Putri Denandra, Alza Dhea Fitria Elizha, Zellvia Emiliannur Emiliannur Emriska, Vellya Ramadhani Fadhila Ulfa Jhora Farras Drasih, Nabilah Fatni Mufit Fauzi Ahmad Muda Festiyed Florentina Simalango, Nora Fortuna, Aprilla Fuja Novitra Gusnedi Gusnedi Hamdi Hamdi Hamdi Hamdi Hamdi Hamdi Rifai Handayani, Silvia Sri Harman Amir hidayanti, hidayanti Hidayati Hidayati Hidayati Hidayati Hufri Hufri Husna, Azmi Asmaul Ikram, Riziqul Kiroomin Barorotin Muji Kolotosa, Julio Fadjar lara agustia Madinah, Nur Mahrizal Mahrizal Maidani, Delvi Putri Mardayani, Reza Sri Marlina Alimir Mesi, Mesi Mia Cahyanti Mufid, Muthia Muhammad Hafiz Murtiani Murtiani Mutiara Novichri, Viona Nengsih, Reni Fitria Nofi Yendri Sudiar Nur Azizah Percindira, Ella Dwi Putri Dwi Sari Putri Dwi Sundari Putri, Ulfa Haldiani Putri, Zakiah Putri Rahmat Hidayat Rahmy Novia Ramli Ramli Ratnawulan . Renol Afrizon Resa, Jerrifel Rata Resi Silvianis Resti Sundari Rifai, Hamidi rina, rina novita Salsabila, Salsabila Saqilah, Alya Sari, Nurul Fadillah Silvi Yulia Sari Siska Fitri Alwi Sri Ayu Wahyuni Sudiar, Novi Yendri Syafriani Syafriani Syafriani Syafriani Syafriani, Syafriani Syafriani, - Tati Herlina Ulfa Jhora, Fadhila Wahyu Ramadhan Wahyuni Satria Dewi Wulandari, Mia Yana Ramadhani Yendri Sudiar, Nofi Yurnetti Yurnetti Yusrila, Yoga Zainul Adha Zatil Ismah, Amirah Zikri, Ahmad Raihan zu, Zurahma Zulhendra Zulhendra