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Hamdi Akhsan

Department Of Physics Education Faculty Of Teaching And Education, Sriwijaya University, Indralaya, 30139, Indonesia

Author-ID : 600847

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Korelasi SST, OLR Terhadap Curah Hujan di Wilayah Pesisir Timur Sumatera Amanda Kurnia Utami; Muhammad Irfan; Hamdi Akhsan
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 9 No. 2 (2025): November Edition
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v9i2.4852

This study aims to analyze the influence of sea surface temperature (SST), outgoing longwave radiation (OLR), and the Indian Ocean Dipole (IOD) on rainfall dynamics in the peatlands of East Sumatra’s coast. Data from ERA5 (SST, OLR), BMKG (rainfall), and a calculated IOD index (1982–2024) were analyzed quantitatively using Python and Pearson correlation. Results show SST in the Indian and Pacific Oceans correlates significantly and positively with rainfall (r > 0.6; p < 0.05), confirming the dominant roles of IOD and ENSO. OLR exhibits a strong negative correlation (r < –0.7; p < 0.05), reflecting its inverse relationship with convective activity and rainfall. The IOD index is significantly correlated with rainfall variation, particularly during positive IOD events, which are linked to rainfall deficits and increased peat fire risk. This quantitative analysis provides a basis for predicting rainfall and mitigating peatland fires.

ENHANCING ACADEMIC WRITING SKILLS THROUGH PODCAST CREATION: A QUALITATIVE CASE STUDY OF EFL STUDENTS AT SRIWIJAYA UNIVERSITY Tamara Shelvy Maharani; Rita Inderawati; Hamdi Akhsan; Tita Ratna Wulan Dari
English Review: Journal of English Education Vol. 13 No. 3 (2025)
Publisher : University of Kuningan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25134/englishreview.v13i3.49

This qualitative case study focused on examining scientific article writing process. Scientific article writing is a crucial skill for university students, yet it is often taught through conventional approaches that do not fully engage learners. To encourage more interactive learning, the English Education Study Program at Sriwijaya University introduced a podcast project in the Article Writing course. This study employed a qualitative case study design, drawing data from student podcast transcripts and questionnaires. Findings showed that while all groups completed the brainstorming stage, many struggled to advance with drafting, revising, and editing, and none discussed publishing. Students most frequently addressed the Introduction and Conclusion, while the Theoretical Overview and Literature Synthesis were less developed. In terms of language features, academic vocabulary was used most consistently, with partial strengths in grammar, coherence and cohesion, and clarity and precision. However, students demonstrated weaknesses in referencing style and objectivity, and no evidence of hedging or formal tone was found. The main challenges reported were teamwork, technical barriers, and time management. These findings suggest that podcasts can serve as effective learning media for academic writing if supported by structured guidance in revision and publication, strengthened academic literacy, and systematic technical and project management support.

Climate Change Implications for Indonesian Agriculture: A Systematic Literature Review Trista Meilanie; Hamdi Akhsan; Kistiono
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 3 (2026): August
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i3.1585

Climate change is becoming an increasing threat to the food security of Indonesia, as it affects agricultural systems, changes the rainfall, raises sea levels, and intensifies extreme weather events. Conducted in the PRISMA protocol, this Review synthesizes the empirical evidence provided by 32 peer-reviewed articles, screened out of a preliminary set of 320 articles, published in 2020-25 in Google Scholar, Sinta, and ScienceDirect and in DOAJ. It is demonstrated that even a 1-2degC rise in temperature can lead to a 25 percent drop in national output of rice, salt intrusion along the coastlines can lower it by approximately 30 percent. Even though farmers have been engaging in different local adaptation responses such as reworking the planting calendars, they are usually stifled by lack of access to climate information, financial support, and technology. Among the mitigation alternatives, the Alternate Wetting and Drying (AWD) technique, 4R nutrient management, and peatland rehabilitation can be singled out as one of the most promising solutions to this issue as they allow mitigating greenhouse gas emissions and enhancing the agroecosystem resilience at the same time. This review suggests the incorporation of holistic adaptation and mitigation policies in national policies, institutional capacity building, and faster breeding and spreading of stress-resistant Plant varieties that can endure climatic change.

Time Dilation in Interstellar Missions: A Systematic Literature Review on Relativistic Effects and Technological Solutions Rara Rara; Nadiar Pertiwi; Hamdi akhsan; Melly Ariska
Kappa Journal Vol 9 No 2 (2025): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i2.30399

Interstellar exploration faces fundamental challenges due to the time dilation effects of Einstein's theory of relativity. This review presents a comprehensive analysis of the principle of time dilation, implications for interstellar missions, as well as cutting-edge technologies that utilize this principle. The Systematic Literature Review (SLR) method with PRISMA approach was applied, resulting in 42 relevant articles that met the inclusion criteria. The review results show that: (1) the effects of time dilation pose significant challenges in interstellar mission planning, particularly in the aspects of navigation, communication, and crew biology; (2) the development of cutting-edge technologies such as the Breakthrough Starshot relativistic vehicle, high-precision atomic clocks, and autonomous AI systems offer innovative solutions to overcome these challenges; (3) the integration of relativity understanding with these advanced technologies opens up new opportunities to realize interstellar exploration in the coming decades. These findings confirm that although time dilation is a major obstacle, the development of revolutionary technologies can turn it into a supporting factor in the realization of interstellar missions.

Visualization of Probability Distribution for a Particle in a One-Dimensional Box using Computational Simulation Zahra Ayanna Firmansyah; Nur Kayla Lekati; Aisyah Veronika; Hamdi Akhsan; Melly Ariska
Kappa Journal Vol 9 No 3 (2025): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i3.33120

This study presents a computational visualization of the stationary states of a particle confined in a one-dimensional infinite potential well, formulated entirely from analytical solutions and implemented in a cloud-based Python environment. Using Google Colab, wave functions, probability densities, and nodal structures were generated for several quantum numbers to illustrate fundamental quantum-mechanical characteristics, including energy quantization, spatial oscillatory behavior, and the emergence of classical correspondence at higher energy levels. The resulting visualizations offer a clear representation of the spatial distribution of quantum states, thereby supporting a conceptual understanding of the underlying analytical model. As a novelty, this study introduces a Colab-based analytical–numerical combination as a visualization medium, a format rarely explored in depth in quantum-well learning contexts. Beyond instructional applications, the modeled system accurately reflects the essential physical behavior of electrons in semiconductor quantum wells, where quantized subband energies and wave-function profiles significantly influence optical and electronic transitions. These findings demonstrate that analytically derived quantum models, when integrated with computational visualization, can effectively enhance conceptual comprehension while offering insight into the fundamental principles governing modern optoelectronic structures.

Green House Gas Emissions from Motor Vehicles in Urban Indonesia: Systematic Literature Review 2015-2025 Intan Mahdiah; Hamdi Akhsan; Fina Maliya; Murniati Murniati
Kappa Journal Vol 10 No 1 (2026): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v10i1.33487

The transportation sector on land in Indonesia is responsible for about 27% of the country's total greenhouse gas emissions, which has a big effect on global warming (KLHK, 2021; WRI Indonesia, 2024). This study looks at trends in vehicle emissions, the main ways emissions are measured, and where more research is needed. It uses a Systematic Literature Review (SLR) method based on the PRISMA 2020 guidelines. The research searched five major databases: Scopus, ScienceDirect, Google Scholar, Portal Garuda, and Sinta, covering the time from January 1, 2015, to December 31, 2025. Out of 512 records found, 26 articles were included after going through a careful selection process. The results show that the number of cars owned increased by about 7–8% each year from 2015 to 2019, and this rate went up to 10–12% every year between 2021 and 2025 after the pandemic. By April 2025, the total number of vehicles in the country was around 168 million, with motorcycles making up most of that number, between 139 and 157 million. Most studies used the bottom-up method (69% of them), and most empirical research was done in Jakarta (14 articles), Surabaya (8 articles), and Bandung (4 articles). Medium-sized cities like Palembang, Medan, and Makassar have not been studied much and are considered scientific blind spots. In 2025, the transportation sector is expected to account for about 24.63% of the country's greenhouse gas emissions in 2024 and might rise to 28% of total carbon emissions from transport. During the dry season, urban areas have air pollution levels that are 42–57% from motor vehicles. More research in these cities is needed to help Indonesia reach its 2030 Nationally Determined Contribution (NDC) goals. This includes making better emission inventories and looking at possible ways to reduce emissions, such as switching to low-emission vehicles, which could help avoid up to 170 million tons of carbon emissions by 2040.

Simulation-Based Visualization of Emission Spectrum Using a Diffraction Grating Lira Lira; Anisa Qoriq Atun Nasiroh; Dia Oktarina Gumanti; Hamdi Akhsan; Nadya Anggraini; Taufiq Taufiq
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 12 No 1 (2026): January-June
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v12i1.12092

This study aimed to develop a simulation-based learning medium for visualizing emission spectrum and predicting spectral colors based on the diffraction grating phenomenon. It employed a Research and Development (R&D) approach, focusing on product development, validation, and feasibility evaluation. The product was assessed through expert validation and small-group testing involving 12 students from the Physics Education Study Program. The validation results showed that the simulation was rated as highly feasible, achieving content validity of 100%, construct validity of 97.3%, linguistic and instructional clarity of 93.3%, and usability and interactivity of 93.3%, resulting in an overall validity score of 96%. These findings demonstrate that the simulation is valid and suitable as an instructional tool for teaching emission spectrum and diffraction grating concepts. As this study was limited to the product development and feasibility evaluation stages, the effectiveness of the simulation in improving students' conceptual understanding and learning outcomes remains to be investigated in future research.

Content Validity of PjBL Modules with a STEM-R Approach on the Topic of Renewable Energy for MTs Students Mega Kurnia; Hamdi Akhsan; Ismet
Jurnal Pendidikan Fisika Vol. 15 No. 1 (2026)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/e8c94q36

Science education in madrasahs requires modules that are scientifically sound and also integrated with Islamic values. However, the modules currently available generally do not systematically integrate the STEM-R approach, nor have they been validated through multidisciplinary assessment. This study aims to assess the content validity of PjBL STEM-R module on renewable energy topic for MTs students. The study uses a quantitative descriptive content validation, involving nine validators from three groups, namely science content experts, teacher practitioners, and religious experts. Data using a 1–5 Likert scale were analyzed using Aiken's V coefficient. The results showed an average Aiken's V of 0.90, with all components (content feasibility, PjBL, creative thinking, religious integration) categorized as Valid (V ≥ 0.83). The religious expert group gave the highest rating (0.92), confirming that the integration of Islamic values was carried out organically, contextually, and theologically appropriate. The findings prove that the module is suitable for use as teaching material that is valid in terms of content and context in a madrasah environment. This validation is an important foundation before wider implementation or testing of its effectiveness in improving students' creative thinking and religious attitudes.

Development of Temperature and Heat Teaching Modules Based on Problem Based Learning to Improve Students' Critical Thinking Mutiara Putri; Hamdi Akhsan; Kistiono
Journal of Science Education Research Vol. 10 No. 1 (2026): J. Sc. Edu. Research
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jser.v10i1.91564

This study aims to develop a physics teaching module based on Problem-Based Learning (PBL) on Temperature and Heat for 11th grade high school students, integrated with deep learning principles and PhET virtual practicums, to enhance critical thinking skills. Due to time and resource constraints, only the first three phases of the 4-D model (Define, Design, Develop) were implemented. Three experts in content, media/design, and curriculumvalidated the module. Ten Grade 11 students from SMA PGRI Gelumbang participated in a small-group trial to assess practicality. Data were collected using a Likert-scale questionnaire and analyzed with the HEOS % formula. The module achieved an average validity score of 96.58%, classified as Very Valid, confirming alignment with curriculum standards and scientific accuracy. Practicality scores ranged from 83% to 90%, falling in the Practical to Very Practical category, indicating students found the module engaging, understandable, and feasible within classroom constraints. The integration of PhET simulations significantly reduced barriers to understanding abstract concepts like heat capacity and energy transfer. The module’s structure supports student-centered learning and can be adapted to diverse learning contexts. By embedding contextualized problems and deep learning strategies, it effectively fosters conceptual understanding and higher-order thinking. The high validity and practicality scores collectively demonstrate that the PBL-integrated module is both technically robust and pedagogically effective for improving critical thinking in thermal physics education. Keywords: Problem based learning, deep learning, temperature and heat, PhET virtual labs, 4-D model, critical thinking.

Stability and Efficiency Optimisation of Renewable Energy Grid-Connected Systems Using Routh-Hurwitz Procedure Hamdi Akhsan; Mega Kurnia; I. Ismet
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol. 13 No. 3: July 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v13i3.15506

The global demand for renewable energy is increasing along with the awareness of the environmental impact of using fossil fuels. This research investigates the application of the Routh-Hurwitz Procedure in enhancing the stability and operational efficiency of grid-connected renewable energy systems through systematic controller tuning and pole placement analysis. This study employed a Systematic Literature Review (SLR) based on PRISMA guidelines. Based on a literature review analysis of 27 articles from 2020-2025, it confirms that the Routh-Hurwitz method improves system stability by ensuring all poles are in the left-hand plane of the complex domain. The findings show that integrating Routh-based tuning with hybrid controllers such as PSO and ANN can reduce frequency oscillations, voltage and frequency stability are improved, and total harmonic distortion (THD) is reduced by as much as 1.967% and enhances frequency control within Â±0.1 Hz. Simulation results corroborate these conclusions and confirm the method's efficacy in actual PV and VSG-based systems. The Routh-Hurwitz criterion provides measurable enhancements in controller design for renewable energy integration and guarantees system stability by methodically assessing pole placement in the complex domain.

Co-Authors Abidin Pasaribu Abidin Pasaribu Abidin Pasaribu, Abidin Adam Darmawan Ade Kurniawan Ade Kurniawan Agung Mataram Agung Sugiarto Agustina, Atika Ahmad Fauzi Ismail Ahmad Fudholi Aisyah Veronika Aji, Dwi Purnomo Aldi Prayoga Aljuzza, Muhammad Ikhsan Almafie, Muhammad Rama Amalia, Wardah Amanda Kurnia Utami Amanda Rahmannisa Andriani, Nelly Anggelina, Putri Anggelina, Zanne Anisa Qoriq Atun Nasiroh Apit Fathurohman Apit Fathurohman Arini Rosa Sinensis Atika Agustina Ayu Sekar Sari Azizah Putri Berimah Berimah, Azizah Putri Cahyani, Delvina Putri Cahyati, Nilam Damayanti, Fitria Siska Dani, Rahma Dea Amalia Dea Rizky Oktavia Dendi Juliansyah Deni Sadly Desilawati Detrika Mawar Arrum Devi Ardiantini Devi Ardiantini Dia Oktarina Gumanti Dwi Purnomo Aji Dwi Purnomo Aji Dwicahyani, Rania Dwita Kartika Sari Edo Anugrah Edray, Auliya Einsrizkianne Effendi Effendi Eka Sutinah Eka Sutinah Elsie Sulastry Erazando Alfa Seira Ermalia, Widia Evelina Astra Patriot Fahreza, Muhammad Aditya Fajriah, Nurkholisa Fatmawati, Fatmawati Fatonah, Amelia Febrianti, Tanti Fena Siska Putriyani Fernando Eric Redondo Fika Nurul Hidayati Fina Maliya Fitri Nisa Fitria Siska Damayanti Fitria Siska damayanti Fitriyani Fitriyani Guruh Sukarno Putra Hayati, Suci Husnul Huriyatul Firdausi I. Ismet Ida Sriyanti Iful Amri Iin Seprina Ina Agustina Intan Mahdiah Intan Purnama Sari Irenta Irenta Ishkaq Iskandar Iskhaq Iskandar Iskhaq Iskandar Iskhaq Iskandar Iskhaq Iskandar Isma Sari Ismet Ismet Ismet Ismet Ismet, Ismet Ismet, I. Izzah Nurhidayah, Izzah Jamiatul Khairunnisa Putri Jesi Pebralia Juwita Febrianti Kartika, Nadia Dwi Kayla Azzakia Ketang Wiyono Ketang Wiyono Ketang Wiyono Ketang Wiyono Kheisya Nadiva Az-Zahra KHOIRUN NISA Kiki Ayu Winarni Kistiono Kistiono Kistiono Kistiono Kistiono Kistiono Kistiono Kistiono Komarudin Komarudin Kurnia, Mega Lamura, M. Danny Pratama Lara Sania Laras Sapitri, Cindy Leni Marlina Leni Marlina Leni Marlina Lestari, Mutiah Lestari, Yora Inda Lira Diska Wati Lira Lira Lira, Lira Lismayana, Pegi Putri M. Nicola Prajaska Maghfira Aulia Mahdiah, Intan Mahmudah, Indri Markos Siahaan, Sardianto Masduki Masduki Mega Kurnia Mega Kurnia Meilanie, Trista Meliani Devina Melinda Maharani Melly Ariska Melly Ariska Melly Junita Melvany, Nanda Eva Miftahul Jannah Mindia Vanessa Pratiwi, Sri Muhamad Yusup Muhamad Yusup Muhamad Yusup Muhammad Aditiyah Muhammad Afrizal Muhammad afrizal Muhammad Aufa Riyaldo Muhammad Irfan Muhammad Irfan Muhammad Irfan Muhammad Irfan Muhammad Irfan Muhammad Muslim muhammad muslim Muhammad Muslim Muhammad Muslim, Muhammad Muhammad Romadoni Muhammad Romadoni Muhammad Yusuf Muhammad Yusup Murnia Murniati Murniati . Mutia Faradini Ramadhanty Mutiah Lestari Mutiara Putri Nadiah Alfania Nadiar Pertiwi Nadya Anggraini Nadya Anggraini Nasiroh, Anisa Qoriq Atun Nazhifah, Rizqia Nely Andriani Nely andriani Nely Andriani, Nely Nestity, Alifia Nia Nopeliza, Nia Nia Three Manurung Nia Three Manurung Nia Three Manurung Nilam Cahyati Nita Arrum Sari Noor Dayana Abd Halim Nor Farahwahidah Abdul Rahman Nor Farahwahidah Abdul Rahman Nora Herliza Noviana, RA Sania Nur Kayla Lekati Nurkholisa Fajriah Pertiwi, Nadiar Pratiwi Ineke Anwar Putra, Gede Mudita Edi Putra, Guruh Sukarno Putri Anggelina Putri Maulida, Nabila Putri Nurhikmah Putri Wijayanti Putri, Arselly Rahmanda Putri, Jamiatul Khairunnisa Putri, Mutiara Juliana Putriyani, Fena Siska Qathrunnada, Sausan Rahma Hafitri Rahman, Nor Farahwahidah Abdul Rahmannisa, Amanda Ramadhani, Neysya Ditha Ramadhona, Tyse Rara Rara Resta Ulis Muslimah Ribkoh, Ribkoh Risa Albeta Rita Inderawati Rizki Novianti, Rizki Romadoni, Muhammad Rosada, Mita Rosdiana Salmah Rianti Salmah Rianti Salsa bila Salsabila Endana Putri Salsabillah, Zahwa Nur Saparini Saparini Sardianto Markos Siahaan Sardianto Markos Siahaan Sardianto Markos Siahaan Sardianto Markos Siahaan, Sardianto Markos Sari, Dwita Kartika Sari, Mona Sekarani, Tresnane Suandti Selvia Mariska Syahputri Seprina, Iin Sherry Junira Sagita Sholeha, Nurlita Dwi Siti Kurdiah Siti Nur Azizah Sopia Sopia Sri Mindia Vanessa Pratiwi Sri Zakiyah Sudirman Sudirman Sudirman Sudirman Suhadi Suhadi Suhadi Suhadi Suhadi Sunarti, Arinda Rahma Supardi Supardi Supardi Supari Supari Supari Supari Supari Supari Supari, Supari Sutanto, Taufiq Syahputri, Selvia Mariska Syahrani, Revanola Gusti Syuhendri, Syuhendri Tamara Shelvy Maharani Tanti Febrianti Taufiq Sutanto Taufiq Taufiq Taufiq Taufiq Tina Oktasari Tine Aprianti Tita Ratna Wulan Dari Tresnane Suandti Sekarani Trista Meilanie Tsabita Husna Tyse Ramadhona Utami, Amanda Kurnia Vania, Amanda Asti VIOLANTI ANARKY, VIOLANTI Wahyuningsi, Wahyuningsi Wailaina Wardah Amalia Wati, Lira Diska Winarni, Kiki Ayu Yendri Tri Hartati Napitupulu Yenny Anwar Yesi Monalika Yuli Setianingsih Yuliana, Rahma Zahlia, Marsela Zahra Ayanna Firmansyah Zahrani, Ami Zulherman Zulherman Zulherman Zulherman, Zulherman

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