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All Journal Bulletin of Electrical Engineering and Informatics Journal of Natural Science and Integration ULIN: Jurnal Hutan Tropis Al Jahiz: Journal of Biology Education Research
Rendy Wikrama Wardana
University of Bengkulu
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Education Electrical & Electronics Engineering Environmental Science Languange, Linguistic, Communication & Media

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Modeling climate phenomenon with software grids analysis and display system in the development of the global warming module Afrizal Mayub; Leni Hendraini; Henny Johan; Fahmizal Fahmizal; Rendy Wikrama Wardana
Bulletin of Electrical Engineering and Informatics Vol 10, No 6: December 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v10i6.3201

Abstract

This study aims to model climate change based on rainfall, air temperature, pressure, humidity and wind with grADS software and create a global warming module. This research uses 3D model, define, design, and develop. The results of the modeling of the five climate elements consist of the annual average temperature in Indonesia in 2009-2015 which is between 29oC to 30.1oC, the horizontal distribution of the annual average pressure in Indonesia in 2009-2018 is between 800 mBar to 1000 mBar, the horizontal distribution the average annual humidity in Indonesia in 2009 and 2011 ranged between 27-57, in 2012-2015, 2017 and 2018 it ranged between 30-60, during the East Monsoon, the wind circulation moved from northern Indonesia to the southern region Indonesia. During the west monsoon, the wind circulation moves from the southern part of Indonesia to the northern part of Indonesia. The global warming module for SMA/MA produced is feasible to use, this is in accordance with the value given by the validate of 69 which is in the appropriate category and the response of teachers and students through a 91% questionnaire.
Seafood Innovation Processing Octopus into Flour and Proximate Composition Analysis as Highly Nutritious Food Ayu Shinka Permata Sari; Bhakti Karyadi; Euis Nursa'adah; Nurhamidah; Rendy Wikrama Wardana; Indarini Dwi Pursitasari
Al Jahiz Vol 7 No 1 (2026): Al-Jahiz: Journal of Biology Education Research, January-June 2026 (In Progress)
Publisher : Faculty of Tarbiyah and Teacher Training UIN Jurai Siwo, Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32332/al-jahiz.v7i1.11202

Abstract

Kaur Regency has abundant marine resources, particularly Octopus vulgaris. According to data from the local Fisheries Service, octopus production in 2023 reached 349,310 kg. However, utilization remains limited to dried products. An alternative innovation is processing octopus into flour, which offers high nutritional value, longer shelf life, and broader applications as a raw material for various food products. This study aimed to produce octopus flour and analyze its proximate composition. Fresh octopus samples were selected, cleaned, boiled, sliced, and sun-dried until completely dehydrated. The dried material was then ground into powder and stored in airtight containers. Proximate and mineral analyses were conducted at the Biology Laboratory, University of Bengkulu, following SNI 01-2715-1996 standards. The macronutrient analysis showed that fat content was 8.19%, meeting SNI Class II standards (<10%). Protein content reached 32.41%, while carbohydrate content was 7.08%. For micronutrients, calcium content was 0.15%, meeting SNI Class I standards (>0.1%), magnesium content was 0.87%, and iron content was 5,412 ppm. Additional nutritional analysis indicated moisture content of 1.96%, fiber content of 0.73%, and ash content of 4.2%, all complying with SNI Class I criteria. In conclusion, octopus flour produced from local resources meets SNI Class I and II standards for macronutrients, micronutrients, and other nutritional parameters, demonstrating its potential as a nutritious and durable alternative food ingredient.
The Future of Science in The Hand: A Review Literature of Mobile Learning from 2015-2024 Fitri April Yanti; Rendy Wikrama Wardana; Hayuni Retno Widarti; Ahmad Walid; Rita Sartika; M. Anas Thohir
Journal of Natural Science and Integration Vol. 8 No. 2 (2025): Journal of Natural Science and Integration
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/jnsi.v8i2.34501

Abstract

This study investigates trends in mobile learning based on data from international publications. Data were collected from the Scopus database covering the period 2015–2024, resulting in a total of 174 selected articles. A systematic literature review (SLR) was employed to synthesize ideas, findings, and knowledge in an academic-oriented framework. The study aimed to analyze annual publication trends, leading contributing countries, targeted skills, educational levels adopting mobile learning, and technologies or applications supporting mobile-based science education. The findings indicate a notable increase in publications in 2020, with the United States contributing the largest share of research. Technologies and applications supporting science learning primarily included virtual reality (VR), augmented reality (AR), and STEM-oriented tools. Mobile learning was found to enhance skills such as conceptual understanding, digital literacy, and science process skills. Among educational levels, mobile learning was most widely implemented in higher education, followed by elementary, middle, and secondary schools. Overall, mobile learning demonstrates potential in fostering essential skills within science and technology education. These findings can inform future strategies and innovations for the effective integration of mobile learning in science curricula.Keywords: mobile learning, science learning, educational skills, learning methods, education level.
Analisis Kualitas Biobriket dari Limbah Kulit Kakao (Theobroma cacao L.) dan Kulit Jeruk (Citrus sinensis) Berdasarkan Parameter SNI 01-6235-2000 Liza Permata Sari; Rendy Wikrama Wardana; Silvia Syeptiani; Aprina Defianti; Annisa Puji Astuti
ULIN: Jurnal Hutan Tropis Vol 10, No 2 (2026): (In Press)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32522/ujht.v10i2.29131

Abstract

Pemanfaatan biomassa sebagai sumber energi alternatif merupakan salah satu upaya untuk mengurangi ketergantungan terhadap bahan bakar fosil yang semakin menipis. Salah satu bentuk pemanfaatannya adalah biobriket yang dibuat dari limbah organik melalui proses karbonisasi dan pemadatan. Penelitian ini bertujuan menganalisis kualitas biobriket berbahan limbah kulit kakao (Theobroma cacao L.) dan kulit jeruk (Citrus sinensis) berdasarkan parameter Standar Nasional Indonesia (SNI 01-6235-2000), yaitu kadar air, kadar abu, nilai kalor, dan kerapatan. Biobriket dibuat dengan tiga variasi komposisi, yaitu A1 (63% kulit kakao:27% kulit jeruk), A2 (45%:45%), A3 (27%:63%), serta dua sampel pembanding, C1 (100% kulit kakao) dan C2 (100% kulit jeruk), dengan penambahan perekat 10% pada setiap formulasi. Hasil penelitian menunjukkan bahwa nilai kalor berkisar antara 5272–5482 kkal/kg dan seluruh sampel telah memenuhi standar minimum SNI (>5000 kkal/kg), dengan nilai tertinggi pada C1. Kadar air berkisar 8,93–10,36%, sehingga sebagian sampel masih melampaui batas SNI (<8%). Kadar abu berada pada rentang 7,84–11,53%, dengan hanya C2 yang memenuhi standar. Kerapatan berkisar 1,05–1,21 g/cm³, menunjukkan struktur briket yang cukup padat. Variasi komposisi bahan memengaruhi kualitas biobriket. Limbah kulit kakao dan kulit jeruk berpotensi sebagai bahan baku biobriket, namun optimasi proses masih diperlukan agar seluruh parameter mutu SNI 01-6235-2000 dapat terpenuhi. 
Co-Authors Afrizal Mayub Ahmad Walid Annisa Puji Astuti Aprina Defianti Ayu Shinka Permata Sari Bhakti Karyadi Fahmizal Fahmizal Fitri April Yanti Hayuni Retno Widarti Henny Johan Indarini Dwi Pursitasari Leni Hendraini Liza Permata Sari M. Anas Thohir Nurhamidah Nursaadah, Euis Rita Sartika Silvia Syeptiani