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All Journal Paedagoria : Jurnal Kajian, Penelitian dan Pengembangan Kependidikan Quantum Teknika Indonesian Applied Physics Letters Journal of Materials Exploration and Findings Haga: Jurnal Pengabdian Kepada Masyarakat
Ilham Nur Dimas Yahya
Politeknik Manufaktur Negeri Bangka Belitung
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences

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Characteristics of Sodium Lithium Titanate Synthesized at Different Solid-State Reaction Temperature for Lithium-Ion Battery Anode Yahya, Ilham Nur Dimas; Sofyan, Nofrijon; Khaerudini, Deni Shidqi; Timuda, Gerald Ensang; Priyono, Slamet
Journal of Materials Exploration and Findings Vol. 2, No. 3
Publisher : UI Scholars Hub

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Abstract

The effect of sintering temperature on the characteristics of sodium lithium titanate (NaLiTi3O7/NaLTO) synthesized at different solid-state reaction temperature and its performance as lithium-ion battery anode has been investigated. The precursors for the synthesis consisted of LiOH.H2O, TiO2, and NaHCO3. The synthesis was performed via solid-state reaction method. The precursors were mixed and sintered at variation temperatures of 900oC, 1000oC, and 1100oC for 2 hours under atmosphere condition. The final product was characterized using X-ray diffraction (XRD) and particle size analyzer (PSA). The XRD analysis showed the main phase of NaLTO with some impurities. PSA analysis showed that the sintering temperature has a significant effect on changes in particle size where the sample at a temperature of 1100oC has the largest particle size of 74.62 µm. The battery was fabricated by firstly mixing NaLTO powder with polyvinylidene fluoride (PVDF) and acetylene black (AB) in a ratio of 85:10:5 wt.% and the mix was then deposited onto copper foil to form NaLTO a sheet. The NaLTO sheet was cut into circular discs with a diameter of 14 mm and were arranged in a sequence of separator, metallic lithium, and electrolyte to form a coin cell in a glove box. Characterization using cyclic voltammetry (CV) and charge-discharge (CD) showed that the NaLTO sintered at 1000oC provided good electrochemical performance with the largest diffusion coefficient of 3.948 x 10-10 m2/s, Coulombic efficiency reached 100%, and a high specific capacity of 65.83 mAh/g.
Characteristics of Carbonaceous Materials Synthesized from Palm Oil Empty Fruit Bunch Waste Using Ferrocene Catalyst Shahab, Ahmad Nabil; Islam, Adinda Izzatul; Wardana, Afif; Yahya, Ilham Nur Dimas; Amalia, Ary Yanuar Tri; Sofyan, Nofrijon; Dhaneswara, Donanta
Journal of Materials Exploration and Findings Vol. 4, No. 1
Publisher : UI Scholars Hub

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The synthesis of carbonaceous materials for reduced graphene oxide (rGO) precursors using oil palm empty fruit bunches waste as a carbon source offers a sustainable solution for waste management in the palm oil industry while delivering high-performance materials. The oil palm empty fruit bunches were carbonized, followed by acid washing, pyrolysis with ferrocene (8%, 12%, and 16% variations), and ultrasonication to produce rGO. The structural, electronic, and morphological properties of the rGO were analyzed using various characterization techniques. The band gap values decreased with increasing ferrocene concentration, from 1.14 eV (8%) to 1.06 (16%), indicating enhanced electronic conductivity. XRD analysis revealed a crystal size increase from 11.3 nm (8%) to 181 nm (16%), while Raman spectroscopy showed a consistent D to G intensity ratio of 0.85, indicating reduced structural defects. SEM-EDS results demonstrated a carbon to oxygen atomic ratio of 4.38 (8%), 3.79 (12%), and 3.77 (16%), confirming successful reduction and improved carbon content. These finding highlight the potential of rGO synthesized from oil palm empty fruit bunches for applications in semiconductors, energy storage, and gas sensing, offering an innovative approach to sustainable materials development.
Pengaruh Parameter Proses 3D Printing Tipe FDM Terhadap Kekasaran Permukaan Produk Menggunakan Filament Acrylonitrile Butadiene Stryene Pristiansyah; Indun; Hasdiansah; Soni Afriansyah; Ilham Nur Dimas Yahya; Ariyanto; Sugianto
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 7 No. 1 (2025): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v7i1.23894

Abstract

A recent development in the manufacturing sector is 3D printing technology. through the direct conversion of 3D computer-aided design (CAD) data into a tangible prototype using the concepts of additive manufacturing. The way that 3D printing technology constructs a prototype is layer by layer. Fibrous materials can be printed using fused deposition modeling (FDM) technology, which produces products with precise geometric properties. Using the Taguchi Method L27(33), three variants of the fixed A transparent ABS There were Three process parameters employed in the study: Nozzle Temperature, Build Plate Temperature, and Print Speed. Filament with a diameter of 1.75 was also used. This study makes use of an FDM Ender 3 Max 3D printer, which has dimensions of x300mm x300mm x350mm. This study's objective is to. The purpose of this study is to measure the surface roughness.test results. The study's experimental findings indicated that, for specimen 2 trials, the ideal roughness value was an average of 14, with the follow parameters, which include 50% print speed, 85°C for the build plate and 250°C for the nozzle temperature.
DIAMOND LIKE CARBON (DLC) COATING ON CARBON STEEL WITH PLASMA TECHNIQUES FOR GAS PIPES Yahya, Ilham Nur Dimas; Rudyardj, Djony Izak; Ady, Jan
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Indonesian Applied Physics Letters - Desember 2020
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23446

Abstract

A study about coating on carbon steel by plasma technique aims to determine the variation of time and pressure on the hardness and corrosion strength of a material. The material used in this research was carbon steel with carbon chest of 0.245%. This carbon steel was a plasma technique process with a temperature of 300oC and various pressure variations, such as 1.2 mbar; 1.4 mbar; 1.6 mbar; 1.8 mbar; And 2.0 mbar. The highest hardness was found at 1.8 mbar pressure, which was 161.7 VHN. Then set with a temperature of 300oC and a pressure of 1.8 mbar and a time variation, which were 1 hour; 1.5 hours; 2 hours; 2.5 hours; 3 hours. The largest hardness value was obtained at 3 hours with a hardness value of 161.7 VHN. Then the corrosion test obtained the optimum value at 2 hours with a corrosion value of 0.69 mpy. This was because on the surface of carbon steel there was a layer of Diamond Like Carbon (DLC).
Attitudes Towards an AI-Augmented Pedagogy in Enhancing English Academic Writing Proficiency: Empirical Evidence from Electrical Engineering Students Indriati, Titin; Veniati, Veniati; Trionanda, Stevanus; Yahya, Ilham Nur Dimas; Manto, Manto
Paedagoria : Jurnal Kajian, Penelitian dan Pengembangan Kependidikan Vol 17, No 2 (2026): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/paedagoria.v17i2.37865

Abstract

This quantitative survey study investigates the perceptions of Electrical Engineering students toward the integration of Artificial Intelligence (AI)-augmented pedagogy in improving English academic writing proficiency. A total of 48 students majoring in electrical engineering at Bangka Belitung State Manufacturing Polytechnic participated in the study. Data were collected through close-ended questionnaires. The data were analyzed using SPSS 25, revealing strong internal consistency (Cronbach’s α = 0.92. The findings revealed that students’ overall attitudes toward the integration of AI were strongly positive (M = 79.69, SD = 11.07), with all three attitudinal dimensions namely cognitive (M = 40.33, SD = 5.18), affective (M = 20.37, SD = 2.97), and behavioral (M = 18.98, SD = 3.34) which also falling within the positive category. These findings reflect the students’ preparedness to engage in technology-supported language learning. Moreover, the study concludes that AI-augmented pedagogy holds significant potential to strengthen students’ academic writing proficiency, particularly in technical and vocational education. Hence, it is recommended that AI tools be integrated into writing instruction while simultaneously fostering the students’ critical digital literacy and sense of ethical awareness.
IMPLEMENTASI PEMBELAJARAN STEM TERINTEGRASI MELALUI DEMONSTRASI TEKNOLOGI, SIMULASI DESMOS, DAN PRAKTIK ENGINEERING PADA SISWA SMA Stevanus Trionanda; Elisa Mayang Sari; Ilham Nur Dimas Yahya; Subkhan; Charlotha; Michael Salim Wijaya
Haga : Jurnal Pengabdian Kepada Masyarakat Vol 5 No 1 (2026): Haga: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Nias Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57094/haga.v5i1.5495

Abstract

The development of technology and the demand of 21-st century skills encourage the need for STEM (Science, Technology, Engineering, and Mathematics) learning in order to develop students’ conceptual understanding, learning motivation, and critical thinking. However, the implementation of STEM learning in schools face problems such as limited integrated, interactive and practice-based learning activities. Therefore, this community service was carried out to give STEM learning through science material provision, technology demonstrations, mathematical simulations using the Desmos application, and simple engineering practices to Harapan High School students in Sungailiat. The activity was held using practice method, demonstration, hands-on practice, and mentoring involving 19 grade 10 students. Evaluation was conducted using questionnaires on understanding, learning motivation, and participant satisfaction which were then analyzed through Method of Successive Interval (MSI) conversion, validity test, reliability test, and Wilcoxon test. Furthermore, based the Wilcoxon test results showed a p value < 0.05 for all indicators, which indicates a increase on students’ conceptual understanding of STEM and learning motivation after participating in the program. Thus, this community service activity has successfully provided an interactive and applicable learning experience, and has the potential to become a STEM learning model that can be developed sustainably in schools.
Co-Authors Amalia, Ary Yanuar Tri Ariyanto Charlotha Deni Shidqi Khaerudini Dhaneswara, Donanta Elisa Mayang Sari Gerald Ensang Timuda Hasdiansah, Hasdiansah Indun Islam, Adinda Izzatul Jan Ady Manto, Manto Michael Salim Wijaya Nofrijon Sofyan, Nofrijon Pristiansyah, Pristiansyah Rudyardj, Djony Izak Shahab, Ahmad Nabil Slamet Priyono Soni Afriansyah Subkhan Sugianto Titin Indriati Trionanda, Stevanus Veniati Wardana, Afif