Article Per Year (5 Year)
p-Index From 2020 - 2025
1.197
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan Teknologi dan Kejuruan Journal of English Language Teaching JSAI (Journal Scientific and Applied Informatics) International Journal of Eco-Innovation in Science and Engineering (IJEISE) Hydrogen: Jurnal Kependidikan Kimia Biomedical and Mechanical Engineering Journal Formosa Journal of Applied Sciences (FJAS) Journal of Clean Technology
Maulana, Ivan
Unknown Affiliation
Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

Published : 8 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 8 Documents
Search

 1 
KUALITAS TES KOMPETENSI TUKANG ACI DAN PLESTERAN BERDASARKAN KKNI (PU) Maulana, Ivan
Jurnal Pendidikan Teknologi dan Kejuruan Vol 16, No 2 (2019): Edisi Juli 2019
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptk-undiksha.v16i2.17141

Abstract

Penguasaan kompetensi merupakan prioritas yang harus dimiliki oleh setiap tukang dalam melaksanakan pekerjaan, untuk mengukurnya diperlukanlah sebuah instrumen. Instrumen harus dapat menjadi acuan penilaian kompetensi tukang sesuai dengan standar yang ada dan kebutuhan di lapangan dalam upaya menciptakan tukang yang berkualitas dan mampu beradaptasi dengan perkembangan industri saat ini. Penelitian ini bertujuan untuk mengetahui apakah instrumen pekerjaan plesteran yang berlaku telah sesuai dengan standar dan kebutuhan lapangan. Rancangan penelitian menggunakan pendekatan kualitatif dengan teknik pengumpulan data berupa kuisioner yang ditujukan ke panel ahli dalam memperoleh justifikasi terhadap instrumen yang sudah ada. Dari hasil penelitian berdasarkan justifikasi ahli diperoleh bahwa beberapa item pekerjaan tidak sesuai dengan implementasi di lapangan saat ini, serta penggunaan metode penilaian yang digunakan kurang tepat pada instrumen yang ada. Manfaat penelitian ini diharapkan dapat menjadi referensi dalam mengembangkan instrumen pekerjaan plesteran Kata kunci: kompetensi, instrument, plesteran
Cooling Machine Adapted Peltier Cooling Module TEC1-12706 to Understand Heat Transfer Application Mardiansah suares, Reza; Maulana, Ivan; Ikhsanudin, Zaky; Imam Ghozali, Achmad; DwiYanto, Agus; abyan H, Rakha; Robi F, Achmad; Setiawan Y, Mazadi; Radissa Dzaky Issafira; Wiliandi Saputro
BIOMEJ Vol. 4 No. 1 (2024): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v4i1.95

Abstract

This paper discusses the development of a simple refrigeration system that utilizes a PSU (Power Supply Unit), Peltier TEC1-12706 module, axial fan, and heatsink. This system is designed to provide an efficient solution for cooling limited spaces or electronic devices at an affordable cost. The PSU is used as the main electrical power source, while the Peltier module functions as the main cooling element that utilizes the thermoelectric effect. An axial fan is integrated to improve heat transfer, increase cooling efficiency, and maintain operational temperatures at desired levels. Heatsinks are used as an addition to the heat absorption and distribution process, ensuring optimal system performance. This research involves experimental testing to measure the system's ability to reduce temperatures and maintain operational stability. The experimental results show that data was obtained from the 5th minute to the 30th minute. The average temperature was 18.54˚C in the 5th minute, 16˚C in the 10th minute, 14.88˚C in the 15th minute, 14.88˚C in the 10th minute. in the 20th minute it was 14.34˚C, in the 25th minute it was 14˚C, and in the 30th minute it was 13.78˚C and obtained a maximum COP value of 0.702 and actual COP 0.212. This research contributes to the development of efficient and affordable cooling technology by utilizing components that are easy to access and apply.
Implementation of the Six Sigma-DMAIC Method for Quality Control in the Red Brick Production Process at Pondok Batu Bata Kampung 1 Tarakan Hidayat, Nurul; Maulana, Ivan; Az-Zahra, Annazwa Zafira; Zain, Rofiqoh Nadiyah; Harpan, Regina Putri
Formosa Journal of Applied Sciences Vol. 3 No. 12 (2024): December 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjas.v3i12.12733

Abstract

Product quality is a key factor in the manufacturing industry, including in the production of red bricks carried out by Pondok Batu Bata Kampung 1 in Tarakan. This study uses the Six Sigma technique as a quality control strategy to improve the red brick manufacturing process, with the aim of increasing production efficiency and product quality. To find, evaluate, and minimize variations that cause product defects, the Six Sigma process is used. Define, Measure, Analyze, Improve, and Control are the steps of the DMAIC technique used. These findings indicate that Six Sigma can increase customer satisfaction while reducing the proportion of defective goods. With proper implementation, this method not only improves product quality but also provides a competitive advantage for Pondok Batu Bata Kampung 1 in the midst of market competition.
Studi Pendahuluan: Evaluasi Kualitas Layanan Komunikasi di Lingkungan Akademik Menggunakan Analisis Sentimen Ramayanti, Desi; Mulya, Imam; Ratnasari, Anita; Dianing Asri, Sri; Maulana, Ivan; Rizal, Muhammad
JSAI (Journal Scientific and Applied Informatics) Vol 8 No 2 (2025): Juni
Publisher : Fakultas Teknik Universitas Muhammadiyah Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36085/jsai.v8i2.8765

Abstract

Google Chat was used in the Faculty of Engineering and Informatics to support academic and non-academic collaboration, with advantages such as real-time, structured communication that is easily accessible by lecturers, students, and administrative staff. This study aimed to analyze the sentiment of Google Chat conversations using the support vector machine (SVM) model to categorize sentiment into positive, negative, and neutral. The data preprocessing process included tokenization, stemming, stop words removal, and text cleaning, using Python with NLTK, Scikit-learn, and Pandas libraries. The study adopted a quantitative approach to analyze sentiment patterns from Google Chat conversations about the quality of services at the Faculty of Engineering and Informatics, as well as experiments to develop and test machine learning models. The preliminary study showed a dataset of 3,735 cleaned data, with invalid or empty elements removed. The data was then categorized into three sentiments: positive, negative, and neutral, based on sentiment analysis of communication text related to services in the academic environment. The next research will focus on selecting the appropriate classification model to provide accurate assessments of the faculty’s service quality.
Students' Self-Reflection in their Grammar Learning at English Department of UNP Maulana, Ivan; Rani, Yati Aisya
Journal of English Language Teaching Vol 14, No 3 (2025)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jelt.v14i3.135675

Abstract

This study aims to describe students’ self-reflection practices in grammar learning among students of the English Language Education Study Program at Universitas Negeri Padang (UNP). The main focus of the research includes the forms of self-reflection employed by students, their perceptions of its importance, and the challenges they encounter in applying self-reflection throughout the grammar learning process. A qualitative descriptive approach was used, with data collected through in-depth interviews. The interview questions were based on seven key indicators of self-reflection: journaling, talking with peers, practicing mindfulness, engaging in creative expression, spending time alone, attending counselling, and speaking or podcasting. The population of this study consisted of students who had completed all grammar courses in the English Education Program at UNP. The findings indicate that most students engage in self-reflection as part of their learning routine, either through written journals or personal contemplation. Students acknowledge that self-reflection aids in recognizing their weaknesses, correcting errors, and deepening their understanding of grammar. However, several challenges were identified, including a lack of guidance from lecturers, time constraints, and low levels of self-awareness among some students. These findings emphasize the vital role of self-reflection in enhancing the effectiveness of grammar learning and point to the need for institutional support to systematically incorporate reflective practices into the learning process.
Formulation of Solid Soap Preparation from Used Cooking Oils with Pineapple Peel Eco-enzyme Salsabila, Luvena; Pradnya, Irene Nindita; Maulana, Ivan; Diana, Savira Rahma; Amalia, Annisa
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 3 (2025): June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i3.15337

Abstract

This study explores the formulation and quality evaluation of solid soap made from recycled cooking oil enriched with fermented Ananas comosus (pineapple) peel extract. Three formulations were prepared using varying concentrations of pineapple peel eco-enzyme, while maintaining consistent proportions of palm sugar and water. The soap samples underwent physicochemical characterization in accordance with Indonesian National Standards (SNI). Results showed that all formulations had pH values within the acceptable range. Moisture content met regulatory limits in two formulations. All samples exhibited good foam stability, although the free fatty acid content exceeded permissible levels, likely due to extended hydrolysis during processing. Organoleptic assessment revealed uniform cream coloration, a characteristic aroma resembling soybean milk that decreased with higher eco-enzyme concentrations, and increased astringency corresponding to the concentration of pineapple extract. The soap maintained a solid texture with varying degrees of tackiness. This research demonstrates the potential for converting household waste into value-added products, while highlighting the need for further optimization to ensure compliance with commercial quality standards.
Utilization of Palm Solid Residue For Bioethanol Production In Sumatra Indonesia – A Review Enjelita, Anggun; Auralita, Kakalia Putri; Aprianti, Resah; Indrajaya, Zahra Afifa; Maulana, Ivan
Journal of Clean Technology Vol. 1 No. 1 (2024): February 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/joct.v1i1.1669

Abstract

The combustion of fossil fuels causes an increase in the release a group of gases found in the earth atmosphere that trap heat and contribute to the greenhouse effect, which in turn contributes to the occurrence of global warming. The advancement of sustainable energy sources plays an important role in human life due to renewable and environmentally friendly. This problem can be resolved by using alternative fuels as renewable sources of energy that are more environmentally friendly, such as bioethanol. Empty fruit bunches (EFB) constitute a portion of the solid waste that cause problems in storage, transportation, and processing costs. This is because EFB is waste in a solid that is produced from a processing facility where the fruits of the oil palm tree are processed to extract palm oil in large quantities. The process of producing bioethanol by utilizing coconut fruit bunches that are devoid of their contents as a raw material involves two essential stages: hydrolysis and drying. Hydrolysis with an acid catalyst results in a lower yield, but the catalyst itself is inexpensive. Conversely, when using enzyme catalysts, hydrolysis produces a greater quantity of reducing sugars. Enzyme catalysts can be employed in the simultaneous saccharification and fermentation (SSF) process using S. cerevisiae yeast, while chemical catalysts can be used in separate hydrolysis and fermentation (SHF) methods. The SSF method provides a comparatively elevated ethanol yield, demands less enzyme usage, has a shorter duration for ethanol production, and is environmentally friendlier when compared to the SHF procedure.
Effect of Blower Power and Engine Speed Variations on Engine Component Temperatures Fueled by B40 and Off-Grade CPO Maulana, Ivan; Saputro, Wilianadi; Saputro, Erwan
International Journal of Eco-Innovation in Science and Engineering (IJEISE) Vol. 6 No. 2 (2025): IJEISE
Publisher : UPN Veteran Jatim

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study examines the effect of blower power variation and engine speed on the temperature of diesel engine components fueled by B40 and off-grade Crude Palm Oil (CPO). The experiment was conducted using a Kubota RD 65 DI-NB diesel engine with a constant electrical load of 4 kW at two engine speeds: 1200 and 2000 RPM. The off-grade CPO was preheated to 100°C, while B40 was used without any special treatment. The blower air supply was varied from 0% to 100% to evaluate its impact on the engine’s thermal behavior. The results indicate that increasing blower power up to 100% causes a rise in temperature in the cylinder head, cylinder block, exhaust pipe, and coolant tank, whereas a decrease in temperature is observed in the intake pipe. Under all engine speed conditions, engines fueled with off-grade CPO showed higher average temperatures compared to those using B40, with increases of 4.81% in the cylinder head, 8.47% in the cylinder block, 10.16% in the intake pipe, 6.86% in the exhaust pipe, and 5.81% in the coolant tank. These temperature increases are attributed to the higher oxygen content and viscosity of off-grade CPO, which lead to larger fuel droplets and incomplete combustion, thereby increasing deposit formation. These findings highlight the significant influence of fuel characteristics and air supply on the thermal performance of diesel engines.
Co-Authors abyan H, Rakha Agus Dwiyanto, Agus Anita Ratnasari Annisa Amalia Aprianti, Resah Auralita, Kakalia Putri Az-Zahra, Annazwa Zafira Desi Ramayanti Diana, Savira Rahma Dianing Asri, Sri Enjelita, Anggun Harpan, Regina Putri Ikhsanudin, Zaky Imam Ghozali, Achmad Indrajaya, Zahra Afifa Mardiansah suares, Reza MUHAMMAD RIZAL Mulya, Imam Nurul Hidayat Pradnya, Irene Nindita Radissa Dzaky Issafira Rani, Yati Aisya Robi F, Achmad Salsabila, Luvena Saputro, Erwan Saputro, Wilianadi Setiawan Y, Mazadi Wiliandi Saputro Zain, Rofiqoh Nadiyah