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All Journal International Journal of Renewable Energy Development IPTEK The Journal of Engineering IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Indonesian Journal of Science and Technology INVOTEK: Jurnal Inovasi Vokasional dan Teknologi JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmiah Pendidikan Profesi Guru Ensiklopedia of Journal Edumaspul: Jurnal Pendidikan EDUTEC : Journal of Education And Technology Journal of Applied Engineering and Technological Science (JAETS) PAKAR Pendidikan Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik JPTE: Jurnal Pendidikan Teknik Elektro AEEJ : Journal of Automotive Engineering and Vocational Education JMES The International Journal of Mechanical Engineering and Sciences Mechanical Engineering for Society and Industry Automotive Experiences Jurnal Vokasi Mekanika Journal of Scientech Research and Development MASALIQ: Jurnal Pendidikan dan Sains Al-DYAS : Jurnal Inovasi dan Pengabdian kepada Masyarakat International Journal of Renewable Energy Development Journal of Innovative and Creativity Journal of Civil Engineering and Vocational Education Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer
Dori Yuvenda
Departemen Teknik Mesin, Universitas Negeri Padang
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The Concise Latest Report on the Advantages and Disadvantages of Pure Biodiesel (B100) on Engine Performance: Literature Review and Bibliometric Analysis Muji Setiyo; Dori Yuvenda; Olusegun David Samuel
Indonesian Journal of Science and Technology Vol 6, No 3 (2021): IJOST: VOLUME 6, ISSUE 3, December 2021
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v6i3.38430

Abstract

Currently, many countries are promoting B100 as the main fuel for diesel engines towards the transition to 100% renewable energy applications. However, due to its properties, B100 has both advantages and disadvantages to replace diesel oil. Therefore, a bibliometric analysis was carried out to evaluate the performance and emissions of a diesel engine with the B100 being tested on a multi-cylinder diesel engine for cars. Unfortunately, only 12 of the 127 selected articles are eligible to be reviewed in detail and none of them discusses all the key performance of diesel engines which include Brake Thermal Efficiency (BTE), Specific Fuel Consumption (SFC), Cylinder Pressure (CPs), Heat Release Rate (HRR), NOx, and smoke. Through data synthesis, we found that the use of B100 provides advantages in engine noise, thermal efficiency, specific fuel consumption, and emissions under certain engine loads. On the other hand, it also has the potential to result in poorer performance, if there is no modification to engine components and the addition of additives. As a recommendation, the results of this analysis provide a guide for further research to examine the use of B100 with all diesel engine performance variables. Research paths can be developed with the wider potential to provide new arguments on various diesel engine technologies, engine capacities, B100 raw materials, and test environments.
Development of Learning Media Using Flypaper in Computer and Network Engineering at SMK Negeri 1 Painan Fancer Rumahorbo; Hasan Maksum; Hansi Effendi; Dori Yuvenda
Edumaspul: Jurnal Pendidikan Vol 6 No 2 (2022): Edumaspul: Jurnal Pendidikan
Publisher : Universitas Muhammadiyah Enrekang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (729.183 KB) | DOI: 10.33487/edumaspul.v6i2.5373

Abstract

This research aims to produce a learning media using flypaper that is valid, practical, and effective in the basics of computer network engineering and telecommunications. Learning media using flypaper is designed to increase student learning outcomes. The method in this study uses Research and Development (R and D) with the 4-D development model. The data analysis technique uses descriptive techniques to describe the validity, practicality, and effectiveness of learning media using flypaper. The results found from this development research: (1) the validity of learning media using flypaper was declared valid in media validation of 0.86>0.6 and material validation of 0.87> 0.6. (2) The practicality of learning media using flypaper from teacher responses with a value of 91.65% and student responses of 84.94% is declared very practical. (3) The effectiveness of learning media using flypaper is declared effective in improving student learning outcomes. Its concluded that learning media using flypaper is valid, practical, and effective to be utilized as a learning tool in basic network and telecommunication engineering subjects.
Fuel Control System on CNG Fueled Vehicles using Machine Learning: A Case Study on the Downhill Suroto Munahar; Muji Setiyo; Ray Adhan Brieghtera; Madihah Mohd Saudi; Azuan Ahmad; Dori Yuvenda
Automotive Experiences Vol 6 No 1 (2023)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.8107

Abstract

Compressed Natural Gas (CNG) is an affordable fuel with a higher octane number. However, older CNG kits without electronic controls have the potential to supply more fuel when driving downhill due to the vacuum in the intake manifold. Therefore, this article presents a development of a CNG control system that accommodates road inclination angles to improve fuel efficiency. Machine learning is involved in this work to process engine speed, throttle valve position, and road slope angle. The control system is designed to ensure reduced fuel consumption when the vehicle is operating downhill. The results showed that the control system increases fuel consumption by 25.7% when driving downhill which an inclination of 5ᵒ. The AFR increased from 17.5 to 22 and the CNG flow rate decreased from 17.7 liters/min to 13.8 liters/min which is promising for applying to CNG vehicles.
PENERAPAN MODEL PEMBELAJARAN PROJECT BASED LEARNING UNTUK MENINGKATKAN HASIL BELAJAR SISWA Sadri Arjono; Nelvi Erizon; Junil Adri; Dori Yuvenda
Jurnal Vokasi Edukasi (VomEk) Vol 5 No 2 (2023): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v5i2.537

Abstract

Pendidikan di kelas ialah kunci terpenting keberhasilan pengajaran salah satunya model belajar yang dipakai oleh pendidik. Hasil belajar merupakan kriteria keberhasilan siswa di kelas. Khususnya nilai ujian peserta didik yang dilakukan pada akhir semester memperlihatkan penguasaan siswa yang belum memperoleh batas kriteria ketuntasan minimum (KKM), sehingga diasumsikan perolehan dengan hasil belajar las SMAW kelas XI teknologi las di SMKN 1 Sumbar masih belum sesuai harapan. Penelitian ini dilakukan dengan memakai classroom action research. Subjek research yakni siswa Teknik Pengelasan kelas XI dengan 14 orang siswa. Penelitian terlaksana pada bulan Januari-Februari 2023 mempunyai 2 siklus. Instrumen penelitian ini menggunakan soal tes pilihan ganda untuk tingkat kognitif dan lembar pengamatan proyek pada tingkat psikomotorik. Hasil dari pengamatan siklus 1 dan 2 memperlihatkan kenaikan pada hasil pembelajaran siswa dengan adanya peningkatan antar siklus. Pelaksanaan siklus pertama memperoleh nilai 74,28 yang bergerak dengan hasil peningkatan jadi 81,49 siklus kedua. Persentase ketuntasan klasikal siklus 1 bernilai 57%, ada kenaikan pada siklus 2 jadi 85%. Indikator keberhasilan research yang ditetapkan yaitu 75 dengan ketuntasan klasiklal minimal 75%. Maka oleh karena itu adapun kesimpulan bahwasanya menerapankan jenis pembelajaran berbasis project based learning pada mata pembelajaran Las SMAW mampu menumbuhkan motivasi dan menaikan hasil belajar siswa.
ANALISIS EFEKTIVITAS SNAPPING ROLL PADA TRAKTOR PEMANEN JAGUNG Ajib Jihadal Mahmud; waskito waskito; Purwantono purwantono; Dori Yuvenda yuvenda; Junil Adri Adri
Journal of Scientech Research and Development Vol 5 No 2 (2023): JSRD, December 2023
Publisher : Ikatan Dosen Menulis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56670/jsrd.v5i2.197

Abstract

Tujuan penelitian ini adalah untuk mengetahui efektivitas pengaruh kecepatan terhadap hasil pemanenan jagung. berdasarkan pengertian penelitian eksperimen,maka pada penelitian ini dilakukan dengan kecepatan putaran snapping roll di rpm 930,8 rpm dan 969,8 rpm.Pemanenan pada kecepatan 930,8 rpm didapatkan waktu pemanenan perbatang jagung nya antara 1,20 detik hingga 1,77 detik dengan total waktu dalam pemanenan 4 batang tersebut adalah 5,69 detik dengan rata-rata pemetikan perbatang adalah 1,42 detik,pada kecepatan ini slip yang ditimbulkan belt dan pully adalah sebanyak 28,7%.Sedangkan pada kecepatan 969,8 rpm didapatkan waktu pemanenan perbatang jagungnya antara 1,16 rpm sampai 1,47 detik dengan total waktu pemanenan 4 batang jagung tersebut adalah 5,25 detik dengan rata-rata pemetikan perbatang adalah 1,31 detik,pada kecepatan ini slip yang ditimbulkan belt dan pully adalah sebanyak 27,4%. Seperti yang dilihat kecepatan snapping rolls terbaik adalah 969,8 Rpm dengan waktu pemanenan 1,16 detik dengan kehilangan putaran sebanyak 139,3 Rpm,Efektifitas pemetikan adalah 1 atau 100% dan efektifitas pengkelobotan 0.Serta slip yang ditimbulkan belt dan pully adalah sebesar 27,4%.
Triglycerides of Crude Palm Oil to Biokerosene: Studies on Electrolysis and Electromagnetic Effect Sri Rizki Putri Primandari; Krismadinata Krismadinata; Dori Yuvenda; Remon Lapisa; Andre Kurniawan; Mulianti Mulianti; Muhammad Djoni Bustan; Sri Haryati; Gusni Sushanti; Tarig Elshaarani; Yus Donald Chaniago
Journal of Applied Engineering and Technological Science (JAETS) Vol. 5 No. 1 (2023): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/jaets.v5i1.3127

Abstract

Crude Palm Oil (CPO) is a potential feedstock for biokerosene. However, it is problematic when used directly because it is gummy, has a high viscosity and is degradable. Various conversion processes have been conducted that directly convert CPO into biokerosene, but it requires high temperature and pressure. Therefore, as a novelty, this study aims to develop the technology for converting triglycerides into biokerosene under relatively low operating conditions and producing similar petroleum kerosene by electrolysis-assisted and electromagnetic induction. In this study, the conversion technology process was conducted in three steps (i) converting triglycerides to Free Fatty Acids (FFA), (ii) converting FFA to alkanes, and (iii) converting alkanes to biokerosene. Step (ii) is assisted by the electrolysis process, meanwhile, step (iii) is assisted by electromagnetic irradiation. The finding showed that electrolysis obtained 73.47% yield of alkanes and electromagnetic irradiation obtained 78.02% yield of biokerosene.  Biokerosene is almost close to kerosene-based petroleum in terms of colour Saybolt, flash point and Net Heating Value. The findings of this study may provide an alternate technology approach for biokerosene synthesis and solution kerosene scarcity.
Effect of Adding Combustion Air on Emission in a Diesel Dual-Fuel Engine with Crude Palm Oil Biodiesel Compressed Natural Gas Fuels Dori Yuvenda; Bambang Sudarmanta; Arif Wahjudi; Rozy Aini Hirowati
International Journal of Renewable Energy Development Vol 11, No 3 (2022): August 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.41275

Abstract

A diesel dual-fuel engine uses two fuels designed to reduce the consumption of fossil fuels. Generally, the specific fuel consumption of diesel dual-fuel engines has increased.  However, in   combination with alternative fuels, namely compressed natural gas injected through air intake, the use of diesel fuel can be reduced. However, using two fuels in a diesel dual-fuel engine increases the equivalent ratio; therefore, the air and fuel mixture becomes richer because the air entering the cylinder during the intake stroke is partially replaced by compressed natural gas. This results in incomplete combustion and increases exhaust emissions, particularly hydrocarbon (HC) and carbon monoxide (CO) emissions. This study aims to improve the combustion process in dual-fuel diesel engines by improving the air-fuel ratio; thus, it can approach the stoichiometric mixture by adding combustion air forcibly to produce complete combustion to reduce CO and HC emissions. An experimental approach using a single-cylinder diesel engine modified into a diesel dual-fuel engine powered by crude palm oil biodiesel and compressed natural gas was adopted. The combustion air was forcibly added to the cylinder using an electric supercharger at different air mass flow rates ranging from 0.007074 to 0.007836 kg/s and different engine loads (1000 to 4000 watts). The results indicated that adding more air to the cylinder could produce complete combustion, reducing the emission levels produced by a diesel dual-fuel engine. An air mass flow rate of 0.007836 kg/s can reduce CO, HC, and particulate matter emissions by averages of 60.55%, 49.63%, and 86.87%, respectively, from the standard diesel dual-fuel engine. Increasing in the amount of oxygen concentration improves the quality of the air-fuel ratio, which results in improved combustion and thereby reducing emissions.
Upskilling Guru Kejuruan melalui Pelatihan Kendali Motor Listrik Berbasis Variable Speed Drive Doni Tri Putra Yanto; Citra Dewi; Dori Yuvenda; Aswardi Aswardi; Rahmat Hidayat; Muslim Muslim; Hermi Zaswita
Jurnal Pendidikan Teknik Elektro Vol 4 No 2 (2023): Jurnal Pendidikan Teknik Elektro
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jpte.v4i2.341

Abstract

This research discusses efforts to enhance the professional competence of teachers in Vocational High Schools (SMK) specializing in the field of Electricity. It does so through the implementation of a training program based on Variable Speed Drive (VSD) technology for electric motor control. The training program encompasses two distinct learning approaches: theoretical and practical instruction on motor control using VSD technology. This material forms an essential part of the curriculum for installing electric motors in vocational schools. It is crucial for every teacher to comprehend it thoroughly, as vocational school curricula must adapt to the latest developments in science and technology, commonly referred to as the Fourth Industrial Revolution (Industry 4.0). This research focused on 20 electricity teachers at SMK Negeri 1 Bukittinggi as its subjects. The research findings indicate a significant improvement in teachers' professional competence in electric motor installation, particularly in electric motor control using VSD technology, following the implementation of the training program. This improvement is reflected in the posttest results, with 88.7% of participants passing in this particular subject. In conclusion, the Variable Speed Drive Based Electric Motor Control Training for teachers can effectively enhance their professional competence in electric motor installation, aligning with the demands of Industry 4.0.
Design of a Drying Equipment Moringa Leaf with Utilizing Temperature Air Conditioning Condenser Masykur Masykur; Maidi Saputra; Al Munawir; Pribadyo Pribadyo; Muhammad Jalil; Muzakir Muzakir; Dori Yuvenda; M. Yasep Setiawan; Fadhil Y
invotek Vol 23 No 2 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i2.1120

Abstract

This study conducted to get drying equipment a moringa leaf using air temperature from an air conditioning condenser. The first steps taken were collecting research literature, formulating problems, and design a drying equipment moringa leaf (moringa oleifera) using air temperature from an air conditioning condenser. Drying equipment tool made from plywood, wood, aluminum foil, styrofoam, and pipe channel to drying equipment. It works by utilizing air from the air conditioning condenser which is channeled through a pipe channel to drying equipment. The test was carried with modification intake channel to drying equipment without suction fan and using suction fan. Data collection is carried out every 30 minutes for 7 hours which starting from 10.00 AM to 05.00 PM. A sample of 800 grams of wet moringa leaf was placed on each drying rack. The result study without suction fan in the drying equipment show average temperature air from the condenser of 31.17 °C, average humidity of 68.8%, and a reduction in water content of moringa leaf of 35.5%. Meanwhile, the test using an air suction fan in the drying equipment was average temperature air from the condenser 34.10 °C, average humidity was 62.30% and the reduction in water content of moringa leaf was 40.8%. The drying rate of moringa leaf in the test using an exhaust fan is 0.0138 kg/hour, while the drying rate of moringa leaf in the test without using an exhaust fan is 0.01 kg/hour.
HUBUNGAN FASILITAS TERHADAP MOTIVASI BELAJAR MAHASISWA UNP PESISIR SELATAN Setrihan Putra; Eko Indrawan; Irzal Irzal; Dori Yuvenda
Jurnal Vokasi Edukasi (VomEk) Vol 6 No 2 (2024): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v6i2.605

Abstract

Salah satu elemen yang memerlukan perhatian dalam mendukung semangat belajar adalah fasilitas pembelajaran. Penelitian ini bertujuan untuk menginvestigasi keterkaitan antara fasilitas pembelajaran dan motivasi belajar pada mahasiswa Universitas Negeri Padang di Pesisir Selatan. Metode penelitian yang digunakan dalam studi ini adalah pendekatan kuantitatif dengan pendekatan deskriptif. Sampel penelitian mencakup 105 mahasiswa dari Universitas Negeri Padang yang terbagi dalam tiga jurusan: S-1 Sistem Informatika, D-III Teknik Mesin, dan D-III Teknik Otomotif. Sampel ini melibatkan tiga tahun angkatan, yaitu 2020, 2021, dan 2022. Data diperoleh melalui kuesioner dan observasi. Analisis data melibatkan pemberian skor berdasarkan tanggapan pada kuesioner serta evaluasi setiap jawaban terhadap pernyataan dalam kuesioner. Data dianalisis menggunakan perangkat lunak SPSS versi 26.0. Hasil analisis menunjukkan bahwa adanya hubungan positif antara fasilitas pembelajaran dan motivasi belajar, dengan persentase 85,43% responden menyatakan adanya korelasi ini berdasarkan hasil dari kuesioner.
Co-Authors Abdu Idham Aditya Kolakoti Agia Kulkarni Preti Ahmad Arif Ahmad Arif Ajib Jihadal Mahmud Al Munawir Alper Calam Anaperta, Yoszi Mingsih Andre Kurniawan Andre Kurniawan Andri, Rezky Andrizal Andrizal Aprinaldi, Aprinaldi Ari Kurniawan Arif Wahjudi Arwizet Arwizet, Arwizet Asnil Asnil Aswardi Aswardi Azis, Ismail Azuan Ahmad Bahrul Amin Bambang Sudarmanta Bambang Sudarmanta Bulkia Rahim Citra Dewi Dedi Setiawan Dedi Setiawan Eko Indrawan Erizon, Nelvi Erzeddin Alwi Fadhil Y Fancer Rumahorbo Faris Afif Fauza, Anna Niska Gusni Sushanti Hansi Effendi Haq, Syaiful Haris Yuliardiansyah Harmanto, Dani Hasan Maksum Hendra Dani Saputra Hendra Hidayat Hermi Zaswita I Gusti Bagus Wiksuana Irzal Irzal Jamaludin Jamaludin Jamaludin Jamaludin Jose da Silva Junil Adri Krismadinata Krismadinata Krismadinata Krismadinata, Krismadinata Kurnia, M. Chalid M. Nasir M. Yasep Setiawan M. Yasep Setiawan Madihah Mohd Saudi Maidi Saputra Martias Martias Martias Martias Masykur Masykur Milana Milana Moch. Aziz Kurniawan Muhammad Djoni Bustan Muhammad Jalil Muhammad Kunta Biddinika Muhammad Rifqi Muhibbudin Muhibbudin Muji Setiyo Muldi Yuhendri Mulianti Mulya Melda Muslim Muslim Muzakir Muzakir Nelvi Erizon Nor Azwadi Che Sidik Nurdin Hendri Nuzul Hidayat, Nuzul Oki Muraza Olusegun David Samuel Olusegun David Samuel Pribadyo Pribadyo Primawati Primawati Purwanto, Wawan purwantono purwantono Purwantono Purwantono Purwantono, Purwantono Putra, Randi Purnama Rahadian Zainul Rahmadona, Tiwi Rahmat Hidayat Raihan, Muhammad Randi Purnama Putra Ray Adhan Brieghtera Refdinal Refdinal Refdinal, Refdinal Remon Lapisa Remon Lapisa Ridho Illahi Ridho Nurmansyah Rifdarmon Rifdarmon Rifelino Rifelino Robert, Julio Rozy Aini Hirowati Sadri Arjono Setrihan Putra Sri Haryati Sri Rizki Putri Primandari Suroto Munahar Tarig Elshaarani Tiwi Rahmadona Toto Sugiarto Tuessi Ari Purnomo Veri Budiawan Arham Wagino Wagino Wagino Wanda Afnison Waskito Waskito Waskito, Waskito Yanto, Doni Tri Putra Yolli Fernanda Yus Donald Chaniago