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All Journal ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika R.E.M (Rekyasa Energi Manufaktur) Jurnal Jurnal Teknik Industri : Jurnal Hasil Penelitian dan Karya Ilmiah dalam Bidang Teknik Industri Jurnal Agrotek UMMat Jurnal Pengabdian Magister Pendidikan IPA Jurnal Gema Ngabdi Jurnal Abdi Insani Journal Industrial Engineering and Management (JUST-ME) Jurnal Pengembangan Masyarakat Lokal
Tawaqqal, Akbar
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Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences

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Development of Anthropometrics Database for Ages 19-21 in West Nusa Tenggara: Optimizing Secondary Data for Industrial Product Design Kurnia, Fikrihadi; Pradityatama, Maharsa; Tawaqqal, Akbar
JTI: Jurnal Teknik Industri Vol 11, No 1 (2025): JUNI 2025
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/jti.v11i1.35468

Abstract

This study aims to develop an anthropometric database for individuals aged 19-21 in West Nusa Tenggara (NTB) Province to support ergonomic product design tailored to local physiological needs. A descriptive quantitative approach was employed, involving direct measurements of body dimensions in a sitting posture from 52 samples selected via purposive sampling. Key measurements included sitting height, eye level while seated, shoulder height, popliteal length, and other relevant dimensions, analyzed for normality, sufficiency, and consistency. The data followed a normal distribution with sufficient sample validity. Percentile values (P1, P5, P50, P95, P99) revealed significant variations in body dimensions, providing a robust reference for ergonomic design across sectors like creative industries, education, healthcare, and agriculture. The anthropometric database enables designing inclusive, comfortable, and safe products that accommodate various body sizes, enhancing user experience and efficiency in NTB’s key industries. The study is limited to NTB’s 19-21 age group and seated posture measurements, restricting its applicability to Indonesia’s broader population or other postures. Future research should expand geographic scope and include diverse postures to enrich national anthropometric data. Keywords: Anthropometry, Ergonomic Design, Seated Posture, Percentiles, West Nusa Tenggara.  
Upaya Mendukung Diversifikasi Energi Di Lingkungan Kampus Melalui Pengisian Baterai Sepeda Listrik Mandiri Pada PLTS Off-grid Universitas Mataram Harjian, Muhammad Rivaldi; Adnyani, Ida Ayu Sri; Supriyatna; Natsir, Abdul; Perdana, I Ketut; Putra, R. Reski Eka; Tawaqqal, Akbar
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 2 (2025): April-Juni 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i2.11501

Abstract

This Community service aims to design and implement an independent electric bicycle battery charging system using an Off-grid Solar Power Plant (PLTS) in the campus environment of the University of Mataram. The charging system is designed with two models: charging via an inverter using the bicycle's built-in charger and direct charging using a charging box equipped with a boost converter, charging regulator module, Arduino, current and voltage sensors, and LCD. The electric bicycle battery charging test started at 09:40–16:10 WITA. The initial voltage when charging the battery was 44.04 Volts and the initial battery charging current was 5.86 A. The battery charging time was 6.5 hours until the battery voltage reached 49.98 Volts and the total energy required was 681.02 Wh (Watt-hour). Testing was carried out on two charging methods, namely fixed and non-fixed currents, to compare charging efficiency and effectiveness. The test results show that the independent charging system can charge a 48 Volt 12 Ah electric bicycle battery in about 6.5 hours with a total energy of 681.02 Wh. Charging efficiency through the charger box ranges from 80–98%. This system is considered effective in supporting the use of renewable energy and environmentally friendly transportation in the campus environment.
OPTIMALISASI GENERATIVE AI (QWEN) DALAM MENINGKATKAN EFISIENSI TUGAS GURU DAN TENAGA KEPENDIDIKAN DI SMA NEGERI 1 MOYO UTARA Aprianto, Romi; Iksan, Muhammad; Suharli, Suharli; Suryani, Erma; Tawaqqal, Akbar
Jurnal Pengembangan Masyarakat Lokal Vol. 8 No. 1 (2025): Jurnal Pengembangan Masyarakat Lokal
Publisher : LPPM Universitas Samawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58406/jpml.v8i1.1934

Abstract

Perkembangan teknologi digital telah mendorong transformasi dalam dunia pendidikan, termasuk dalam cara guru dan tenaga kependidikan menjalankan tugasnya. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengoptimalkan penggunaan Generative AI, khususnya melalui platform Qwen, dalam meningkatkan efisiensi kerja di lingkungan SMA Negeri 1 Moyo Utara. Metode yang digunakan adalah pelatihan dan bimbingan teknis berbasis praktik langsung, yang melibatkan 27 peserta terdiri dari guru dan tenaga kependidikan. Data dikumpulkan melalui pretest, posttest, kuesioner, observasi, dan dokumentasi, lalu dianalisis secara deskriptif kuantitatif dan kualitatif. Hasil kegiatan menunjukkan peningkatan rata-rata pemahaman peserta sebesar 30,15 poin, serta peningkatan pemahaman tematik sebesar 35–45% pada aspek seperti konsep dasar AI, fungsi Qwen, aplikasi pembelajaran, dan etika teknologi. Peserta merasakan manfaat nyata berupa efisiensi waktu dalam menyusun dokumen administratif dan perangkat pembelajaran. Meskipun terdapat tantangan seperti keterbatasan infrastruktur dan literasi digital, kegiatan ini berhasil membangun kesadaran akan potensi AI sebagai mitra kerja profesional. Rekomendasi diarahkan pada penguatan kapasitas digital, pendampingan berkelanjutan, serta kebijakan sekolah yang mendukung pemanfaatan teknologi secara etis dan berkelanjutan.
Pelatihan Pembuatan Konten Digital Menggunakan Aplikasi Canva Untuk Mengoptimalkan Pemasaran Produk UMKM di Desa Lab. Jambu Tawaqqal, Akbar; Aprianto, Romi; Hidayatullah, Syarif
Jurnal Gema Ngabdi Vol. 7 No. 1 (2025): JURNAL GEMA NGABDI
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jgn.v7i1.497

Abstract

Micro, small, and medium enterprises (MSMEs) face challenges in product marketing and visibility in the digital era. This community service project aimed to enhance the digital content creation skills of MSME owners in Labuan Jambu Village, Sumbawa Regency, using the Canva application. The method employed consisted of three stages: introduction to digital content and the Canva application, hands-on content creation practice, and one-month post-training mentorship. Results showed significant improvements in participants' understanding of digital content importance, ability to produce quality content, and implementation of digital strategies in their businesses. The majority of participants successfully created relevant content without direct assistance, leading to increased customer interactions on social media and product demand from outside the region. Challenges encountered included device limitations, unstable internet connections, and difficulties in maintaining consistent application. This activity contributes to the national agenda of MSME digitalization and can serve as a model for other regions. Recommendations include developing digital infrastructure, establishing a digital MSME community, integrating training into government programs, and diversifying training materials. In conclusion, this training effectively enhanced MSMEs' digital skills, supporting local economic growth and improving competitiveness in the digital era. Keywords: MSMEs, digital content, Canva, digital marketing, economic empowerment, digitalization
Analysis of Six Big Losses on Injection Molding Machines to Improve Production Effectiveness Tawaqqal, Akbar; Harjian, Muhammad Rivaldi; Aprianto, Romi
Journal Industrial Engineering and Management (JUST-ME) Vol. 6 No. 01 (2025): Journal Industrial Engineering and Management (JUST-ME)
Publisher : Program Studi Teknik Industri Fakultas Teknik Universitas Islam Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47398/justme.v6i01.95

Abstract

This study analyzes the six big losses affecting the effectiveness of injection molding machines to enhance production efficiency in the plastics industry. Utilizing Overall Equipment Effectiveness (OEE) as a key metric, the research measures availability, performance, and quality rates across ten injection molding machines to identify dominant loss factors. Through Pareto analysis and fishbone diagrams, the study pinpoints mold replacement, drool in the nozzle, and color replacement as primary contributors to reduced OEE. Data collected via interviews, observations, and company records reveal that idling, minor stops, and equipment failures account for significant time losses, with specific machines exhibiting OEE values as low as 56%. Recommendations include implementing preventive maintenance, standardizing machine parameters, improving production scheduling, and providing operator training to align with Total Productive Maintenance principles. These strategies aim to minimize downtime and optimize equipment utilization, offering practical solutions for improving productivity and competitiveness in manufacturing.
The Effect of Variations in the Composition of Cocoa Shell Charcoal and Peanut Shell Charcoal on Briquette Characteristics Ahmad Akromul Huda; Tawaqqal, Akbar; Hidayatullah, Syarif; Juniardi, Nurdin
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 10 No 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v10i2.1777

Abstract

Agricultural biomass such as cocoa husks and peanut shells have great potential as raw materials for briquettes to support the provision of sustainable alternative energy. This study aims to evaluate the effect of variations in the composition of these two materials on the characteristics of briquettes, including calorific value, moisture content, ash content, and burning time. The study was conducted using a completely randomized design (CRD) with five treatment compositions (KC1=100:0, KC2=70:30, KC3=50:50, KC4=30:70, KC5=0:100) and three replications. Data were analyzed using Analysis of Variance (ANOVA), and if significant effects were found, the analysis was continued with Duncan’s Multiple Range Test (DMRT) at the 5% level. The results showed that a high proportion of cocoa husk resulted in higher moisture content (15.78%) and lower calorific value (3867 kcal/g), while a high proportion of peanut husk increased the calorific value to 5340 kcal/g and burning time to 84.8 minutes, but was accompanied by higher ash content (17.57%). The balanced mixture of KC3 (50:50) and KC4 (30:70) proved to offer the best compromise, with moisture content <10%, calorific value >4400 kcal/g, burning time >78 minutes, and ash content still within an acceptable range. Thus, although pure peanut shell briquettes (KC5) offer the highest performance, the combination of KC3 and KC4 is more worthy of consideration for improving briquette quality while optimizing the utilization of abundant cocoa shell waste.
Effect of Adhesive Concentration on Briquette Characteristics from a Mixture of Cocoa Shells and Groundnut Shells as an Alternative Fuel Huda, Ahmad Akromul; Tawaqqal, Akbar; Hidayatullah, Syarif; Wirasansir, Genta
Jurnal Agrotek Ummat Vol 12, No 4 (2025): Jurnal Agrotek Ummat: Oktober
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jau.v12i4.34037

Abstract

Agricultural wastes such as cocoa shells and groundnut shells hold significant potential as environmentally friendly alternative energy sources, particularly in West Nusa Tenggara Province, where these commodities are produced in abundance. However, their utilization as biomass energy materials remains limited and underdeveloped. In response to this potential, this study aims to evaluate the effect of varying tapioca starch adhesive concentrations on the characteristics of briquettes made from a mixture of cocoa shell charcoal and peanut shells. The research was conducted experimentally using three adhesive concentrations (10%, 20%, and 30%), with tests performed on calorific value, moisture content, ash content, and flame duration. The results revealed that increasing the adhesive concentration tended to decrease the calorific value and increase both the moisture and ash contents, although it extended the flame duration. The briquettes with 10% adhesive concentration exhibited the best performance, achieving a calorific value of 5,310 cal/g, a moisture content of 7.57%, an ash content of 7.56%, and a flame duration of 73 minutes. These values comply with the Indonesian National Standard (SNI) for charcoal briquettes, which require a minimum calorific value of 5,000 cal/g, a maximum moisture content of 8%, and a maximum ash content of 8%. These findings highlight the importance of proper adhesive formulation to improve the quality of local biomass-based briquettes and support the transition toward clean and sustainable energy..
PELATIHAN MEMBUAT ECOBRICK UNTUK GENERASI MUDA DALAM MENINGKATKAN KEPEDULIAN KEBERSIHAN LINGKUNGAN DI PEDESAAN Hidayatullah, Syarif; Suteja, Suteja; Huda, Ahmad Akromul; Sari, Nasmi Herlina; Tawaqqal, Akbar
Jurnal Abdi Insani Vol 12 No 10 (2025): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v12i10.2872

Abstract

The issue of plastic waste in rural communities has become an urgent environmental concern due to limited waste management facilities and low public awareness of the impacts of plastic pollution. The massive use of plastics without proper disposal systems has led to the accumulation of waste that contaminates the environment. One practical and educational solution that can be implemented is the production of ecobricks, which involves processing plastic waste into environmentally friendly building materials. This activity aimed to enhance the knowledge, awareness, and skills of young people aged 10–16 years in Ambung Village, East Masbagik District, in managing plastic waste through ecobrick-making training. The implementation method consisted of three stages: socialization, training, and evaluation. The socialization stage involved an interactive lecture on the dangers of plastic waste, followed by hands-on practice in making ecobricks using used plastic bottles. Evaluation was conducted using pre-test and post-test instruments to measure participants’ understanding of the reduce, reuse, recycle (3R) concept. The results showed a significant increase in participants’ knowledge levels, with an average pre-test score of 51.5 and a post-test score of 84.5, representing an improvement of 63.4%. Participants gained a better understanding of plastic waste management processes, were able to produce ecobricks independently, and were motivated to apply this knowledge at home while encouraging family members and peers to participate. Moreover, the activity fostered a sense of collaboration and creativity among participants by transforming plastic waste into functional products such as flower pots and garden benches. It can be concluded that ecobrick-making training effectively increased ecological awareness, knowledge, and practical skills among young people in plastic waste management, serving as an initial step toward a cleaner and more sustainable village environment.
Hybrid Particle Swarm Optimization–Simulated Annealing OPF for Lombok Generation Cost Reduction HARJIAN, MUHAMMAD RIVALDI; MULJONO, AGUNG BUDI; TAWAQQAL, AKBAR; PUTRA, RAJA RESKI EKA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 13, No 4: Published November 2025
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v13i4.409

Abstract

This study proposes the application of Optimal Power Flow (OPF) in the Lombok Electricity System consisting of 19 buses and 7 generating units, with the main objective of reducing production costs under peak load conditions. The method used is a hybrid optimization method that combines two methods, namely the Particle Swarm Optimization and Simulated Annealing algorithms. Particle Swarm Optimization and Simulated Annealing (PSO–SA) method. Combining PSO and SA algorithms can improve the weaknesses of PSO with its jumping feature. In other words, the use of the PSO-SA algorithm is more effective than the PSO method. The simulation results show a generation cost of USD 31,158. The total generated power is 193,736 MW, which is equivalent to a total load of 193.34 MW. In addition, the voltage profile of all buses is at 0.95–1.05 pu and the power flow of all lines is below the thermal capacity. This finding confirms that the use of the PSO–SA algorithm effectively reduces operating costs without violating the system's operating constraints.
Co-Authors Agung Budi Muljono Erma Suryani Harjian, Muhammad Rivaldi Huda, Ahmad Akromul Ida Ayu Sri Adnyani Juniardi, Nurdin Kurnia, Fikrihadi Maharsa Pradityatama Muhammad Iksan, Muhammad Nasmi Herlina Sari Natsir, Abdul Perdana, I Ketut Putra, R. Reski Eka PUTRA, RAJA RESKI EKA Romi Aprianto Suharli, Suharli Supriyatna Suteja Suteja, Suteja Syarif Hidayatullah Wirasansir, Genta