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INDONESIA
Jurnal IPTEK Bagi Masyarakat
Published by Ali Institute of Research and Publication
ISSN : 28077261     EISSN : 28077253     DOI : -
Core Subject : Humanities, Health, Science, Education, Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Education Mechanical Engineering Physics Public Health Social Sciences
J-IbM: Jurnal IPTEK bagi Masyarakat, diterbitkan oleh Ali Institute of Research and Publication (AIRA). J-IbM menerbitkan artikel ilmiah berkaitan dengan pengabdian, praktik dan proses keterlibatan masyarakat. J-IbM adalah jurnal online peer-review yang didedikasikan untuk publikasi penelitian berkualitas tinggi yang berfokus pada pengabdian berbasis penelitian dengan tema penerapan atau implementasi IPTEK bagi Masyarakat.
Arjuna Subject : Umum - Umum
Articles 153 Documents
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Toward Effective Vocabulary Acquisition in EFL Classrooms: Examining the Effect of Differentiated Learning at the Junior High School Level Fatima, St. Nur Aima; Noni, Nurdin; Aeni, Nur
Jurnal IPTEK Bagi Masyarakat Vol 5 No 3 (2026)
Publisher : Ali Institute of Research and Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55537/j-ibm.v5i3.1651

Abstract

This study examined the effect of the differentiated learning approach on EFL students’ vocabulary acquisition at the junior high school level. Vocabulary is a fundamental component of language learning; however, many EFL students still experience difficulties due to differences in readiness levels, interests, and learning profiles. Although differentiated learning has been widely discussed in previous studies, its empirical implementation in improving vocabulary acquisition in junior high school EFL contexts remains limited. Therefore, this study aimed to determine whether the differentiated learning approach significantly affects students’ vocabulary acquisition. This study employed a quantitative method using a quasi-experimental design with a non-equivalent control group. The population consisted of all ninth-grade students at UPT SMPN 3 Kelara, and the sample was selected through purposive sampling, involving two classes as the experimental and control groups. Data were collected through pre-tests and post-tests, and analyzed using statistical tests to measure the differences between groups. The findings revealed that the experimental group demonstrated significantly greater improvement compared to the control group. The mean score of the experimental group increased substantially from 30.71 in the pre-test to 65.95 in the post-test, indicating the effectiveness of differentiated learning in enhancing students’ vocabulary acquisition. In conclusion, the differentiated learning approach significantly improves EFL students’ vocabulary acquisition and provides an effective alternative to conventional teaching methods in promoting student-centered learning at the junior high school level.
Integration of Energy Quality and Financial Feasibility in the Production of Oil Palm Frond Chips and Pellets Alamsah, Yogi; Widayat, Widayat; Suedy, Sri Widodo Agung
Jurnal IPTEK Bagi Masyarakat Vol 5 No 3 (2026)
Publisher : Ali Institute of Research and Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55537/j-ibm.v5i3.1652

Abstract

Indonesia, as the world’s largest palm oil producer, generates significant quantities of oil palm frond (OPF) biomass that remain underutilized. This study evaluates the technical characteristics and economic feasibility of converting OPF into energy products in the form of chips and pellets. Laboratory analyses including proximate, ultimate, and calorific value tests were conducted to assess fuel quality, followed by a techno-economic evaluation using a 15-year investment horizon and an 11% discount rate. Results show that pelletization improves fuel properties, particularly by reducing moisture content and increasing calorific value under actual conditions. The higher heating value (HHV) of pellets reached 3,962 kcal/kg under air-dry conditions, compared to 1,746 kcal/kg for chips. On a dry ash-free basis, the calorific values of both products were comparable, indicating that moisture content significantly influences actual energy performance. Economic analysis indicates that pellet production under coal price equivalence schemes does not achieve attractive financial returns, with internal rates of return (IRR) below the discount rate and payback periods exceeding project lifetime. Sensitivity analysis suggests that a selling price of Rp1,000,000 per ton or a calorific value above 5,300 kcal/kg is required to reach financial feasibility. In contrast, chip production with low calorific value is economically unviable; however, improving chip quality to 4,060 kcal/kg results in a financially feasible scenario, achieving an IRR of 32.3% and payback within four years. The findings highlight that product form, energy quality, and market pricing mechanisms critically determine the viability of OPF-based bioenergy development.
Analysis of the Potential Use of Mining Waste as Raw Material in the Production of Environmentally Friendly Construction Materials Rafiuddin, Rafiuddin; Hati, Bunga
Jurnal IPTEK Bagi Masyarakat Vol 5 No 3 (2026)
Publisher : Ali Institute of Research and Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55537/j-ibm.v5i3.1653

Abstract

This study evaluates the feasibility of using three mining-related waste materials, namely tailings, steel slag, and fly ash, as alternative raw materials for environmentally friendly construction products. Although these wastes have been widely examined in previous studies, comparative experimental evidence under a unified testing scheme remains limited, particularly in the Indonesian construction context where material variability and standardization constraints affect field adoption. The novelty of this study lies in positioning the three waste types within the same performance framework by examining compressive strength, water absorption, and corrosion-related durability indicators against a conventional control mixture. Laboratory tests were conducted using a screening-scale experimental design. Compressive strength testing followed the principle of ASTM C39/C39M, water absorption testing followed ASTM C642, and corrosion-related mass/thickness loss evaluation was adapted from laboratory immersion corrosion principles. The results indicate that slag-based specimens showed the highest performance among the waste-based materials, with 28-day compressive strength of 42.1 MPa and water absorption of 3.7%. Fly ash-based specimens reached 36.5 MPa but showed higher water absorption of 6.8%, while tailing-based specimens reached 34.0 MPa with 4.7% water absorption. Compared with the conventional control specimen, the slag-based material achieved approximately 93.6% of the control compressive strength, suggesting its technical potential for selected construction applications after durability and environmental safety validation. The study contributes a comparative performance map and a methodological basis for further optimization of mining waste utilization in sustainable construction materials.

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