Article Per Year (5 Year)
p-Index From 2021 - 2026
2.765
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan Fisika Undiksha Jurnal Ilmu Sosial dan Humaniora Jurnal Penelitian Pendidikan IPA (JPPIPA) JMM (Jurnal Masyarakat Mandiri) ORBITA: Jurnal Pendidikan dan Ilmu Fisika Martabe : Jurnal Pengabdian Kepada Masyarakat WIDYA LAKSANA Indonesian Physical Review JURNAL PENDIDIKAN MIPA Jurnal Filsafat Indonesia Journal of Comprehensive Science PENDASI: Jurnal Pendidikan Dasar Indonesia
Ida Bagus Putu Mardana
Universitas Pendidikan Ganesha
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

Published : 65 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 65 Documents
Search

 3   4   5   6   7 
SYNTHESIS OF MAGNETITE NANOPARTICLES (Fe3O4) BASED ON TAMAN RIVER SAND MAGNETIC MINERALS Agung, Gusti Kade Agung Widiantara; Mardana, Ida Bagus Putu; Arjana, I Gede
Indonesian Physical Review Vol. 7 No. 3 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i3.314

Abstract

This research aims to produce Fe3O4 magnetic nanoparticles-based Taman River sand as the raw material through coprecipitation. The Fe content percentage in the Taman River sand after separation was characterized using XRF testing. The lattice parameters and crystal size of the samples were tested using XRD. The nanoparticles' morphology, structure, particle shape, and elemental content were characterized using SEM-EDX. The magnetic properties and magnetic saturation values were tested using VSM. XRF testing results on the iron sand showed a Fe content of 84.72%. The synthesis resulted in a brNownish-black Fe3O4 nanoparticle powder that a permanent magnet could attract. Based on the XRD results, the Fe3O4 nanoparticle powder peaks were obtained at X-ray diffraction pattern angles of 2θ: 21.44°, 35.38°, 41.74°, 50.78°, 63.36°, 67.70°, and 74.66°, indicating the presence of Fe3O4 nanoparticles. The crystal structure formed was cubic with lattice parameters a = b = c = 8.331 Å and a crystal size of 18.43 nm. SEM-EDX results showed an average particle size of 25-30 nm. VSM results indicated that the Fe3O4 sample had a saturation magnetization (Ms) of 27.36 emu/g, a remanent magnetization (Mr) of -0.01 emu/g, and a coercive field (Hc) of 0.01 T.
Sulfidation of Iron - Based Nanomaterial as Catalyst for Water Splitting Using Hydrothermal Lestari, Ni Luh Ayu Ardi; Arjana, I Gede; Mardana, Ida Bagus Putu
Journal of Comprehensive Science Vol. 3 No. 5 (2024): Journal of Comprehensive Science (JCS)
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jcs.v3i5.728

Abstract

Consumption of fossil fuels causes greenhouse effect and global warming, hence the need for renewable energy sources that are environmentally friendly. Hydrogen is one of the abundant elements on earth. Hydrogen refers to a clean and renewable energy source, hydrogen can be a good choice to reduce greenhouse gas emissions. One way to produce hydrogen is by electrochemical water splitting. This study aims to determine the characterization of iron-based nanomaterials (iron sulfide - iron hydroxide) as a water splitting catalyst in general. Iron sulfide synthesis was carried out using hydrothermal sulfidation method for 6 hours at 80 oC with nickel foam as substrate. Synthesis of iron sulfide varying the concentration of sodium sulfide nonahydrate (0.0125 M, 0.025 M, 0.05 M and 0.1 M) produced brownish yellow to blackish grey colored samples. Characterization results using XRD showed that iron sulfide peaks were detected at higher concentrations of sodium sulfide nonahydrate. Based on the results of analyzing iron hydroxide using SEM, it is known that the sample is in the form of nano walls and on iron sulfide, it is known that the sample is in the form of nanoscale particles. Based on electrochemical measurement results, iron hydroxide can be a good catalyst for hydrogen evolution reaction (HER) compared with commercial Pt/C. The overpotential of iron hydroxide is smaller than Pt/C, which is only 15 mV at a current density 10 mA/cm2 and iron sulfide can be a good catalyst for oxygen evolution reaction (OER) with electrocatalytic measurement results close to commercial RuO2. This is indicated by the small overpotential (260 mV at current densisty 10 mA/cm2 and small tafel slope (51 mV/dec).
Effectiveness of a STEM-Based High School Chemistry Textbook with Scaffolding Strategy to Improve Students' Critical Thinking Skills Liani, Kadek Delita; Suardana, I Nyoman; Mardana, Ida Bagus Putu
Jurnal Penelitian Pendidikan IPA Vol 10 No 11 (2024): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i11.7181

Abstract

This study aims to explain the effectiveness of STEM-based high school chemistry textbooks with scaffolding strategies to improve critical thinking skills. This type of research involved research and development by adapting the Borg and Gall development models. The research instrument used was a critical thinking essay test. The research subjects were students of class XI A SMA Negeri 3 Singaraja. The research design used was a pre-experimental with one-group pretest-posttest design. The data were analyzed using a normalized gain score and a one-sample proportion test. The results showed that the n-gain score obtained was 0.56. The one-sample proportion test results showed a significance value of 0.001. Thus, a STEM-based high school chemistry textbook with a scaffolding strategy is effective in improving students' critical thinking skills.
PENERAPAN TEKNOLOGI OLAHAN MAKANAN BERBAHAN IKAN LAUT DAN DAUN KELOR SEBAGAI UPAYA PENINGKATAN EKONOMI DAN PENCEGAHAN STUNTING Chrisinta, Debora; Simarmata, Justin Eduardo; Ledheng, Ludgardis; Gelu, Leonard Peter; Sukerti, Ni Wayan; Gitakarma, Made Santo; Mardana, Ida Bagus Putu
JMM (Jurnal Masyarakat Mandiri) Vol 10, No 1 (2026): Februari
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v10i1.36180

Abstract

Abstrak: Program Kosabangsa di Desa Oepuah Selatan, Kabupaten Timor Tengah Utara, dilaksanakan sebagai upaya mengatasi rendahnya produktivitas usaha rumah tangga dan tingginya prevalensi stunting yang dipengaruhi oleh keterbatasan akses pangan bergizi dan pengelolaan usaha berbasis teknologi. Program ini bertujuan untuk meningkatkan kapasitas produksi, manajemen, dan pemasaran kelompok industri rumah tangga berbasis ikan, serta memperkuat peran Posyandu dalam pengelolaan pangan lokal bergizi dan digitalisasi layanan gizi balita. Metode pelaksanaan meliputi sosialisasi, pelatihan, workshop, pendampingan, dan penerapan teknologi tepat guna yang dilaksanakan secara partisipatif. Peserta kegiatan terdiri atas Kelompok Industri Rumah Tangga Nekmese sebanyak 27 orang dan kader Posyandu Desa Oepuah Selatan sebanyak 20 orang. Evaluasi program dilakukan melalui observasi langsung, angket kepuasan mitra, dan analisis capaian indikator kinerja program. Hasil kegiatan menunjukkan adanya peningkatan keterampilan teknis dan manajerial mitra industri sebesar 40% pada aspek produksi dan pengemasan, serta peningkatan penjualan produk olahan ikan sebesar 30%. Pada mitra Posyandu, sebanyak 80% kader mampu mengoperasikan sistem pencatatan gizi berbasis digital secara mandiri, disertai peningkatan kesadaran gizi masyarakat. Program ini berkontribusi dalam meningkatkan nilai ekonomi produk lokal, memperkuat kapasitas layanan gizi masyarakat desa, serta menjadi model kolaborasi pemberdayaan berbasis teknologi dan potensi lokal yang berkelanjutan.Abstract: The Kosabangsa Program in Oepuah Selatan Village, North Central Timor Regency, was implemented to address low household business productivity and high stunting prevalence resulting from limited access to nutritious food and inadequate technology-based enterprise management. This program aimed to enhance production capacity, managerial competence, and marketing of fish-based home industries, as well as to strengthen the role of Posyandu in managing nutritious local food and digitalizing child nutrition services. The implementation methods included socialization, training, workshops, mentoring, and the application of appropriate technology through a participatory approach. The program participants consisted of 27 members of the Nekmese Home Industry Group and 20 cadres of the Oepuah Selatan Posyandu. Program evaluation was conducted through direct observation, partner satisfaction surveys, and performance indicator analysis. The results demonstrated a 40% increase in technical and managerial competencies related to production and packaging, along with a 30% increase in sales of processed fish products. Among Posyandu partners, 80% of cadres were able to independently operate digital nutrition recording systems, accompanied by increased community nutrition awareness. This program contributes to enhancing the economic value of local products, strengthening community-based nutrition services, and providing a sustainable model of technology-driven and locally grounded empowerment.
PEMBERDAYAAN MASYARAKAT LOKAL DALAM PEMBUATAN VIRGIN COCONUT OIL DENGAN TEKNOLOGI ALAT PARUT DAN PERAS SEDERHANA UNTUK MENGOPTIMALKAN PEREKONOMIAN Simarmata, Justin Eduardo; Bukifan, Melkisedik; Gelu, Leonard Peter; Chrisinta, Debora; Sukerti, Ni Wayan; Erlina, Nia; Mardana, Ida Bagus Putu
JMM (Jurnal Masyarakat Mandiri) Vol 9, No 1 (2025): Februari
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v9i1.28127

Abstract

Abstrak: Desa Nian memiliki potensi kelapa yang melimpah, tetapi masyarakat hanya menjualnya dalam bentuk mentah dengan nilai ekonomi rendah. Kelompok Tani Oemanas, dengan 29 anggota, mengalami keterbatasan alat dan teknologi untuk mengolah kelapa menjadi Virgin Coconut Oil (VCO). Program pengabdian bertujuan meningkatkan kapasitas pengolahan kelapa melalui penerapan teknologi sederhana dan pelatihan, dengan fokus pada pengembangan hardskill, seperti penguasaan proses teknis dan penggunaan alat, serta softskill, seperti komunikasi, kerja sama tim, dan manajemen waktu, untuk mendukung keberlanjutan dan efektivitas hasil pengolahan. Metode kegiatan meliputi sosialisasi, workshop, pelatihan teknis, penerapan alat modern seperti mesin parut otomatis dan alat pemeras santan, serta pendampingan dan evaluasi. Evaluasi dilakukan melalui observasi, angket sebanyak 12 pernyataan, dan wawancara. Hasil menunjukkan peningkatan kapasitas produksi hingga 60 botol (100 ml) per minggu, efisiensi waktu produksi meningkat 30%, dan kualitas VCO sesuai standar industri. Sebanyak 85% peserta mampu mengoperasikan alat, dan 80% melaporkan peningkatan pendapatan dari penjualan VCO. Program ini meningkatkan soft skill dan hard skill anggota, tetapi juga mengoptimalkan potensi lokal dan mendukung pencapaian SDGs pada tujuan pekerjaan layak dan pertumbuhan ekonomi.Abstract: Nian Village possesses abundant coconut resources, yet the community predominantly sells them in raw form with low economic value. The Oemanas Farmers Group, comprising 29 members, faces limitations in equipment and technology for processing coconuts into Virgin Coconut Oil (VCO). The community service program aims to enhance the capacity for coconut processing through the application of simple technology and training, with a focus on developing hard skills, such as mastering technical processes and tool usage, as well as soft skills, such as communication, teamwork, and time management, to support the sustainability and effectiveness of the processing outcomes. The methods included socialization, workshops, technical training, implementation of modern tools such as automatic graters and coconut milk presses, as well as mentoring and evaluation. Evaluations were conducted through observation, surveys, and interviews. The results indicated an increase in production capacity to 60 bottles (100 ml) per week, a 30% improvement in production efficiency, and VCO quality that meets industry standards. Additionally, 85% of participants successfully operated the equipment, and 80% reported increased income from VCO sales. This program improved members' soft and hard skills but also optimized local potential and supported SDG goals for decent work and economic growth. 
Co-Authors ., Gusti Ayu Putu Bakti Mahayuni ., Kadek Ayu Meilani Wulandari ., Luh Ari Dwi Jayanti ., Luh Putu Santiaji ., Ni Kadek Aridani Basunari ., Ni Kadek Rahayu ., Ni Luh Heny Agustyari ., Ni Pt Sricandra Dewi ., Ni Putu Yuvik Sulistya Dewi ., Putu Kirania Andhika Putri A. A. Istri Agung Rai Sudiatmika Ade Sintia Wulandari Agung Widiantara, Gusti Kade Agung, Gusti Kade Agung Widiantara Agus Adiarta,ST,MT . Amerta, Gede Arya Ari Winata, I Wayan Artanayasa, Wayan Artha, I Komang Restu Widi Astika, I W. M Chrisinta, Debora Dewi Oktofa Rachmawati Dr. I Made Sugiarta, M.Si. . Drs. I Made Wirta, M.Pd . Erlina, Nia Gelu, Leonard Peter Gusti Ayu Putu Bakti Mahayuni . I Gede Arjana I Gede Dana Santika . I Gede Dana Santika ., I Gede Dana Santika I Gede Satya Widura . I Komang Januariyasa . I Komang Januariyasa ., I Komang Januariyasa I Komang Nudina I Made Dwi Juliarta Putra . I Nengah Karang Giarta . I Nengah Karang Giarta ., I Nengah Karang Giarta I Nyoman Putu Suwindra I Nyoman Suardana I Putu Wina Yasa Pramadi I W. M Astika I Wayan Ari Winata I Wayan Sadia I Wayan Suastra Ida Bagus Putu Arnyana Kadek Ayu Meilani Wulandari . Kadek Hary Mahardika . Kadek Hary Mahardika ., Kadek Hary Mahardika Ketut Suma Komang Gede Yudi Arsana . Lestari, Ni Luh Ayu Ardi Liani, Kadek Delita LUDGARDIS LEDHENG Luh Ari Dwi Jayanti . Luh Putu Santiaji . M.Pd Drs. I Made Wirta . Made Santo Gitakarma Melkisedik Bukifan Ni Kadek Aridani Basunari . Ni Kadek Rahayu . Ni Luh Heny Agustyari . Ni Pt Sricandra Dewi . Ni Putu Yuvik Sulistya Dewi . Ni Wayan Sukerti Nur Lutfiyah, Yoni Peter Gelu, Leonard Prof. Dr. I Wayan Santyasa,M.Si . Putu Artawan Putu Dian Pratiwi . Putu Kirania Andhika Putri . Putu Widiarini Putu Yasa Putu Yasa Putu Yasa Simarmata, Justin Eduardo Suyoga Wiguna, Anak Agung Gde yoni nur lutfiyah