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Alfian Qomaruddin
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REKAYASA
Published by Universitas Trunojoyo Madura
ISSN : 02169495     EISSN : 25025325     DOI : https://doi.org/10.21107/rekayasa
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Computer Science & IT Electrical & Electronics Engineering Engineering Physics
This journal encompasses original research articles, review articles, and short communications, including: Science and Technology, In the the next year publication, Rekayasa will publish in two times issues: April and Oktober.
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Articles 17 Documents
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Search results for , issue "Vol 18, No 2: Agustus, 2025" : 17 Documents clear
The Use of Padlet in Writing Learning Reflection: Students’ Perspectives Kurniati, Fadhika; Dzulfikri, Dzulfikri; Bandono, Adi
Rekayasa Vol 18, No 2: Agustus, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i2.30977

Abstract

Digital learning media is indeed developing and plays an important role in creating a pleasant learning environment that can accommodate students' learning needs. Padlet provides space for students to learn digitally, especially through the activity of writing learning reflections. This research is aimed at finding out students' perspectives on the use of Padlet media to write reflection activities. This study was attended by 50 students in the seventh grade using a qualitative research method in the form of phenomenology design. Data was obtained from questionnaires distributed via Google Form, observations, and interviews. The data obtained from the Google Form is strengthened by conducting interviews, where the purpose of the interviews is to check the consistency of the Google Form results. The finding revealed that students gave positive responses regarding Padlet media. They perceived that Padlet media was easy to use, helped the students to discuss developing ideas and exchange ideas, eliminated boredom, increased the students’ participation in writing reflections, and increased students’ learning motivation. It is concluded that Padlet can serve as an effective digital tool to support reflective learning. Future studies are suggested to investigate Padlet's effectiveness in comparison with other digital platforms or in different educational contexts.
Analisis Kecenderungan Musiman Tinggi Gelombang Signifikan di Laut Indonesia Tahun 1980-2020 Untuk Mendukung Pembangunan Pesisir Berkelanjutan Fahmi, Muhammad Baharudin; Wirayuhanto, Harish; Dwito Armono, Haryo; Zikra, Muhammad; Lorentius, Suratno
Rekayasa Vol 18, No 2: Agustus, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i2.29978

Abstract

Sea level rise, as one of the consequences of global climate change, has significantly impacted oceanographic dynamics, particularly wave characteristics. One of the most critical affected parameters is significant wave height, which directly influences maritime safety, the sustainability of fisheries, the stability of coastal infrastructure, and the risk of coastal erosion and tidal flooding. As an archipelagic nation with the second-longest coastline in the world, Indonesia is highly vulnerable to such changes. Therefore, understanding the spatial and temporal trends in significant wave height is essential to support effective adaptation and mitigation policies in coastal regions. This study aims to analyze the trend of increasing significant wave height in Indonesian waters using ERA5 reanalysis data from the European Centre for Medium-Range Weather Forecasts (ECMWF) over the period from 1980 to 2020. The trend analysis was conducted using non-parametric statistical methods, namely the Mann-Kendall test to detect statistically significant trends and Sen’s Slope Estimator to quantify the rate of change. A significance level of 0.05 was applied in the analysis. The results indicate a significant upward trend in significant wave height across several Indonesian maritime regions. Conversely, the northern waters of Central Java and the northern region of Masalembu Island exhibited no statistically significant trend across seasons. The Banda Sea and southern Papua experienced significant increases during the dry season (JJA) and the second transitional season (SON), with a peak rate of 1.70 cm/year. In the southern waters of Lombok Island, positive trends were observed in the wet season (DJF) and the first transitional season (MAM), with rates reaching 1.46 cm/year. The highest trend was recorded in the southern waters of Java during the wet season (DJF), at 1.72 cm/year. These findings suggest that most Indonesian waters are experiencing significant changes in wave characteristics as a result of climate change, highlighting the urgency for long-term oceanographic monitoring and the integration of wave data into coastal development and climate adaptation strategies.
Analisis Efektivitas Fitoremediasi Berbasis Tanaman Hias pada Konsentrasi Formaldehida Dalam Ruangan untuk Meningkatkan Health and Safety Pekerja Inas, Bilqis Hanifah; Dewi, Ratna Sari
Rekayasa Vol 18, No 2: Agustus, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i2.31243

Abstract

Indoor air quality is a crucial factor that directly impacts worker safety and health (K3), where exposure to hazardous pollutants such as formaldehyde can trigger irritation, respiratory disorders, and long-term health risks. Based on this issue, this study aims to analyze in depth the effectiveness of a phytoremediation strategy using ornamental plants in reducing formaldehyde concentrations in office workspace environments. To achieve this goal, sophisticated simulations were conducted using Computational Fluid Dynamics (CFD) methods through the SimScale platform. Four main intervention scenarios were modeled in detail: (1) a control condition with no intervention, (2) the use of mechanical ventilation alone, (3) ornamental plant intervention alone, and (4) a synergistic combination of ventilation and plants. In this simulation, formaldehyde emissions were assumed to originate from the work desk material, while the ornamental plant Ficus benjamina acted as a passive absorbing agent. The simulation results showed that the combination of ventilation and plants was the most superior strategy, capable of drastically reducing formaldehyde concentrations by up to 99.8% in just one hour. Meanwhile, plant intervention alone also made a significant contribution with a reduction of 46%. Further statistical analysis using multiple linear regression and ANOVA confirmed that all interventions had highly significant effects (p 0.05). Furthermore, it was revealed that plant placement influenced absorption effectiveness, with positions closer to the emission source showing better absorption. These findings emphasize the importance of an integrated strategy between plant arrangement and ventilation engineering to create a healthy, safe, and productive work environment.  
My Wondering “Are EFL Excited Learning toward Interactive Media?” The Perception Study from EFL Bandono, Adi; Kurniati, Fadhika; Wati, Sundari; Rahmawati, Yuliana; Maulifah, Umul; Purwaningsih, Elis Dwi; Winarni, Winarni
Rekayasa Vol 18, No 2: Agustus, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i2.30994

Abstract

Interactive Learning Multimedia is a technological tool that can be effectively utilized as a learning resource. This type of media not only supports the instructional process but also contributes positively to students' learning outcomes. The use of digital platforms enables teachers to express their creativity and tailor their teaching approaches to align with students' learning styles and interests. Implementing Google Sites as a platform for delivering interactive multimedia facilitates more effective learning and enhances students’ understanding of the material. This study aims to describe students’ perceptions of learning procedural texts through Interactive Learning Multimedia based on Google Sites. A qualitative approach with a phenomenological design was employed. Data were gathered through observations of students’ active participation and motivation, along with reflection sheets covering their perceptions, understanding, and evaluations of the media. Data analysis was conducted from the outset of data collection, involving reduction, presentation, and conclusion drawing. The findings revealed that students held highly positive perceptions toward the use of interactive media. They reported feeling happy, interested, and motivated while learning procedural texts through this medium.
Status Terkini Kondisi Ekosistem Terumbu Karang di Pulau Saobi dan Pulau Sapapan, Kepulauan Kangean, Sumenep Handoko, Ahmad; Saptarini, Dian; Irawan, Dedi
Rekayasa Vol 18, No 2: Agustus, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i2.26076

Abstract

Coral reefs are marine biota that have a fairly high level of sensitivity to changes in water conditions, both in terms of physical and chemical aspects. Damage experienced by coral reef ecosystems is increasingly occurring, this can be caused by human and natural activities. This research aims to determine the condition of the coral reef ecosystem on Saobi Island and Sapapan Island. The method used in this research is Underwater Photo Transect (UPT). The observation location consists of 7 stations, of which 4 stations are on Saobi Island and 3 stations are on Sapapan Island. The growth forms found are Acropora Branching (ACB), Acropora Digitate (ACD), Acropora Submassive (ACS), Acropora Tabulate (ACT), Coral Branching (CB), Coral Encrusting (CE), Coral Foliose (CF), Coral Massive (CM), Coral Mushroom (CMR), Coral Submassive (CS). The condition of the coral on Sapapan Island is included in the good category at station 1 with a live coral cover percentage of 53.67% and in the very good category at station 2 and station 3 with a live coral cover percentage of 78.87% and 77.80%. Meanwhile, on Saobi Island, the condition of coral reefs at station 1 is included in the medium category with a percent cover value of 46.53% and station 2 is 67.53%, station 3 is 65.33% and station 4 is 52.47% which is included in good category.
Analisis Life Cycle Assessment untuk Pengembangan Pariwisata Berbasis Teknologi Produk Gula Aren Menuju Wisata Kuliner Berkelanjutan di Kabupaten Sumbawa Barat Risma, Gita Adita; Azzumardi, Nispi; Efendi, Junaidi
Rekayasa Vol 18, No 2: Agustus, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i2.30819

Abstract

Penelitian ini bertujuan untuk mengintegrasikan pendekatan Life Cycle Assessment (LCA) dengan pengembangan agrowisata berbasis teknologi, guna mendorong pembangunan wisata kuliner berkelanjutan di Kabupaten Sumbawa Barat, khususnya pada produk gula aren. Pendekatan penelitian dilakukan dengan penerapan LCA untuk menilai dampak lingkungan dari produksi gula aren, meliputi jejak karbon, efisiensi energi, dan emisi limbah. Hasil analisis kemudian diintegrasikan ke dalam media edukasi berupa digital platform, infografik, dan papan informasi di lokasi wisata. Studi ini mengambil objek di Desa Mataiyang, Kabupaten Sumbawa Barat, yang memiliki jumlah pohon aren terbanyak di wilayah tersebut. Hasil penelitian menunjukkan bahwa integrasi LCA dalam agrowisata dapat meningkatkan kesadaran wisatawan terhadap keberlanjutan proses produksi gula aren. Selain itu, penelitian ini juga memberdayakan masyarakat lokal sebagai pelaku edukasi, sekaligus membuka peluang pengembangan sektor UMKM dan pariwisata berbasis saintek. Inovasi penelitian ini terletak pada penggabungan metode LCA dengan konsep agrowisata, di mana hasil analisis lingkungan tidak hanya menjadi bahan evaluasi, tetapi juga diolah menjadi sarana edukasi interaktif bagi wisatawan. Model ini menawarkan pendekatan baru dalam pengembangan desa wisata yang berfokus tidak hanya pada produk akhir, tetapi juga pada proses produksi yang ramah lingkungan dan informatif.
Risk Analysis in the Construction Industry Using Project Management Life Cycle and House of Risk Hidayat, Ananda Syalsabila; Gunarta, I Ketut
Rekayasa Vol 18, No 2: Agustus, 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i2.30820

Abstract

This study aims to identify risks arising in housing construction projects, particularly those related to budget overruns, and to develop mitigation strategies to ensure that projects run according to plan in terms of cost, time, and resources. The methods used are the Project Management Life Cycle (PMLC) to map the project stages from initiation to closure, and the House of Risk (HoR) to identify risk events and risk agents. The novelty of this study lies in the development of difficulty analysis in HoR, which focuses on three main aspects —cost, time, and resources — that have not been explicitly described in previous studies. The results show that the project experienced a cost increase from IDR 150 million to IDR 165 million due to dominant risks, including misinterpretation of design drawings, fluctuations in material prices, and work delays. Through HoR analysis, priority risks were successfully identified, and mitigation strategies were developed in the form of team training to improve design understanding, control of material usage, and the implementation of contingency planning. This research contributes academically by modifying the HoR method with difficulty analysis based on cost, time, and resources, and integrating it with PMLC. It also provides practical guidance to contractors and project managers on anticipating and managing risks more effectively, thereby improving cost efficiency, timeliness, and resource optimization in housing construction projects.

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