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Component Design and Strength Analysis of Coffin Lowering Machine for COVID-19 Corpse: A Problem-Based Learning Khoiriyah, Nisa; Alfatih, Shahreza Agung; Munir, Misbakhul; Triawan, Farid
Indonesian Journal of Multidiciplinary Research Vol 1, No 1 (2021): IJOMR: VOLUME 1, ISSUE 1, 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

The increasing number of deaths due to COVID-19 followed by an excessive number of burials had risen the emergence of a safety plan, supporting the burial process to minimize the dangerous impact on the human. The conventional way of burying the corpse with infectious disease in Indonesia utilizes ropes to lower the coffin and involves four to eight people. However, this is not practical because it is energy-wasting and crowding. This paper aims to propose a design of a safe, practical, and robust coffin lowering machine. The proposed design is available for all ages with a weight of up to 200 kg. The design has a 2000 x 600 x 750 mm dimension, in which the width can be extended from 600 to 1000 mm. The straps for lowering the coffin are mounted on the left and right-side shafts. Each of the components is connected with a pin joint. Then, the components are analyzed by calculating the static and fatigue strength to obtain the safety factor and to determine the service life. As a result, the proposed design demonstrates the safety factors for static and fatigue condition that are higher than one, indicating it can be considered for fabrication. In addition, the presented work can be referred as a problem-based learning case study in Machine Element Course.

Review of the Potential use of Poly (lactic-co-glycolic acid) as Scaffolds in Bone Tissue Recovery Saptaji, Kushendarsyah; Asriyanti, Asriyanti; Khoiriyah, Nisa; Muryanti, Laely; Setiawan, Iwan
Makara Journal of Science Vol. 28, No. 1
Publisher : UI Scholars Hub

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Scaffolds are used as temporary tissue in the human body to expedite healing. Biocompatible materials play a vital role in the field of tissue engineering. Therefore, they can be used to reduce human pain as soon as possible. Polymeric materials are widely used to replicate bone tissue. Poly(lactic-co-glycolic acid) (PLGA) is a potential material for bone tissue scaffolds because of its superior properties, including compatibility with the human body. Accordingly, adding hydroxyapatite and introducing different fabrication methods can enable the production of PLGA scaffolds with good abilities to help cells grow, expand, differentiate, and proliferate. The paper reviews the current development of the biocompatible material PLGA as bone tissue scaffolds. It focuses on the applications, properties, improvements, and sustainability of PLGA.

Level Up With Problem-Based Learning Students’ Perception Of Its Impact On Learning In Efl Context Khoiriyah, Nisa; Perdana , Purnama Rika; Fitriani, Dini
Jurnal Penelitian Ilmu Pendidikan Indonesia Vol. 4 No. 1 (2025)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jpion.v4i1.329

This study aims to investigate the impact of Problem-Based Learning (PBL) on the outcomes of the 9th-grade students in an English language learning context. Drawing on theories of PBL and previous research, the study employs a surveying approach to explore students' perceptions and performance following PBL implementation. The findings reveal a positive result of PBL from students’ perception, demonstrating improvements in understanding course materials, critical thinking, problem-solving skills, self-directed learning, confidence in knowledge application, and finally their scores. Additionally, students show increased engagement and motivation in PBL activities, attributing it to the relevance and appeal of presented problems. These results emphasize the efficacy of PBL in enhancing students’ experiences and preparing them for real-world challenges.

Fabrication of Synthetic Lumbar Vertebrae by a Combination of FDM 3D-Printing and PU Foam Casting from Two Injection Techniques for Surgical Training Triawan, Farid; Khoiriyah, Nisa; Asriyanti, A.; Utomo, Muhammad Satrio; Saptaji, Kushendarsyah; Fernandez, Nikolas Krisma Hadi; Muflikhun, Muhammad Akhsin
ASEAN Journal for Science and Engineering in Materials Vol 5, No 1 (2026): (ONLINE FIRST) AJSEM: Volume 5, Issue 1, March 2026
Publisher : Bumi Publikasi Nusantara

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This study aims to introduce a rapid and precise fabrication technique of lumbar vertebrae model that mimics the cortical and cancellous parts of the bone using polylactic acid (PLA) and polyurethane (PU) foam, respectively. An FDM 3D-printing using PLA filament was utilized to fabricate the cortical part, then PU foam was molded into the printed cortical to form the cancellous part. The fabricated model was examined by comparing its dimensions with the stereolithography (STL) model. Sequentially, density measurement, compressive test, and microstructure observation were performed to evaluate the specimen characteristics. The results showed that the dimensions of the vertebrae model agreed well with the STL model, with a discrepancy of less than 4%. The fabricated PU samples exhibited a density in the range of 476–557 kg/m³, elastic moduli of 3.99–7.17 MPa, and a pore size of 136.66–179.80 µm, which are lower than the properties of human bone. Despite that, the PU samples maintain their compressive strength of 0.329–0.589 MPa, which is within the range of cancellous human bone.

The Efficacy of Podcast in EFL Learning: A Systematic Literature Review Khoiriyah, Nisa; Ummah, Nasihatul; Hidayani, Selnistia
Tanjungpura Journal of Language Education Vol 1, No 2 (2024)
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/tjole.v1i2.81709

This study explores the effectiveness of podcasts in enhancing English language skills for EFL learners. A systematic literature review was employed to analyze research published between 2019 and 2024. The findings reveal podcasts as a versatile tool, potentially improving various language skills. Listening comprehension emerged as a particular strength, with studies showing increased student engagement and understanding. Exposure to native speakers through podcasts can also benefit speaking fluency, accuracy, vocabulary, and pronunciation. Combining podcasts with activities like podcast creation or self-awareness training can further refine speaking and pronunciation skills. Overall, podcasts offer a promising and engaging approach for EFL instruction. However, their effectiveness depends on targeted skills, learning context, and curriculum integration. While limitations exist, the potential benefits of podcasts for motivation, engagement, and language development make them a valuable asset in the modern EFL classroom.

Students’ View on English Assessment in Indonesia’s Merdeka Curriculum: A Kirkpatrick Evaluation Model Khoiriyah, Nisa; Tarihoran, Naf’an; Fitriani, Dini
International Journal of Multidisciplinary: Applied Business and Education Research Vol. 6 No. 11 (2025): International Journal of Multidisciplinary: Applied Business and Education Res
Publisher : Future Science / FSH-PH Publications

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/ijmaber.06.11.01

Using Kirkpatrick's Four-Level Evaluation Model of reaction, learning, behavior, and results, this study investigates how students view English assessment in the Indonesian Merdeka Curriculum. This study involved 41 high school students who answered a valid and reliable Likert scale questionnaire, using a quantitative descriptive design. Students' perceptions were generally positive, according to descriptive statistical analysis conducted using SPSS 26. Most students acknowledged that the assessment was fair, relevant to classroom learning, and motivating. In addition, students reported behavioral changes such as increased classroom participation, but they experienced improvements in learning, especially in vocabulary and confidence. Although some students remained neutral, students said that the assessment helped their overall language development. The clarity of instructions, adequacy of time, and comfort during the assessment were also issues. These results indicate that, although the Merdeka Curriculum assessment method is in line with basic principles, some elements of practice need to be improved in order to optimize students' learning experiences and learning outcomes.

Students’ View on English Assessment in Indonesia’s Merdeka Curriculum: A Kirkpatrick Evaluation Model Khoiriyah, Nisa; Tarihoran, Naf’an; Fitriani, Dini
International Journal of Multidisciplinary: Applied Business and Education Research Vol. 6 No. 11 (2025): International Journal of Multidisciplinary: Applied Business and Education Res
Publisher : Future Science / FSH-PH Publications

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/ijmaber.06.11.01

Using Kirkpatrick's Four-Level Evaluation Model of reaction, learning, behavior, and results, this study investigates how students view English assessment in the Indonesian Merdeka Curriculum. This study involved 41 high school students who answered a valid and reliable Likert scale questionnaire, using a quantitative descriptive design. Students' perceptions were generally positive, according to descriptive statistical analysis conducted using SPSS 26. Most students acknowledged that the assessment was fair, relevant to classroom learning, and motivating. In addition, students reported behavioral changes such as increased classroom participation, but they experienced improvements in learning, especially in vocabulary and confidence. Although some students remained neutral, students said that the assessment helped their overall language development. The clarity of instructions, adequacy of time, and comfort during the assessment were also issues. These results indicate that, although the Merdeka Curriculum assessment method is in line with basic principles, some elements of practice need to be improved in order to optimize students' learning experiences and learning outcomes.

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