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All Journal INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Rekayasa Material, Manufaktur & Energi JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) JURNAL PENDIDIKAN TAMBUSAI Journal of Applied Engineering and Technological Science (JAETS) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik Jurnal Vokasi Mekanika ALSYS : Jurnal Keislaman dan Ilmu Pendidikan MASALIQ: Jurnal Pendidikan dan Sains DEVOTE: Jurnal Pengabdian Masyarakat Global Jurnal Aplikasi IPTEK Indonesia Journal of Engineering Researcher and Lecturer Ranah Research : Journal of Multidisciplinary Research and Development

Nurdin Hendri

Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Negeri Padang

Author-ID : 1428621

Religion Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Public Health Social Sciences Transportation Other

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Efektivitas Pembelajaran Blended Learning dengan Menggunakan Google Classroom Rahmat, Febri; Purwantono, Purwantono; Nurdin, Hendri; Putra, Randi Purnama
ALSYS Vol 5 No 2 (2025): MARET
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/alsys.v5i2.4829

Blended learning using Google Classroom is a combination of face-to-face and online learning that utilizes the Google Classroom platform to facilitate interactions between students and teachers outside the classroom. This study aims to assess the effectiveness of implementing blended learning using Google Classroom. The study employs a quantitative method with a descriptive research design. It involves 27 students from the Grade XI Industrial Mechanical Engineering program at SMK Negeri 1 Sumatera Barat. Data collection was conducted through questionnaires and documentation The questionnaire in this study assessed five aspects: the use of Google Classroom, interaction in learning, technological accessibility, comfort and satisfaction, and the effectiveness of blended learning. The analysis results for each assessed aspect were as follows: the use of Google Classroom at 76.66%, interaction in learning at 71.29%, technological accessibility at 75.37%, comfort and satisfaction at 70.74%, and the effectiveness of blended learning at 68.51%. This indicates that students’ overall response to the effectiveness of blended learning using Google Classroom was 73.19%, categorized as effective.

CFD-based Taguchi optimization of impeller geometry to improve centrifugal fan efficiency Delima Yanti Sari; Bagas Santoso; Hendri Nurdin; Hastuti Hastuti; Rifelino Rifelino; Fitrah Qalbina; Tsung-Liang Wu; Dani Harmanto
Teknomekanik Vol. 9 No. 2 (2026): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v9i2.53772

Centrifugal fans play a significant role in industrial ventilation systems. Their performance is affected by aerodynamic losses such as flow separation and non-uniform pressure distribution, thereby reducing the overall efficiency. Since design parameters influence the fan efficiency, design parameter optimization becomes one option for addressing this issue. Some optimization methods involve high computational cost and complex procedures. This raises the necessity for a more efficient and systematic optimization procedure. The aim of this study is to propose an integrated approach which involves Computational Fluid Dynamics (CFD) and the Taguchi method to improve the performance of a centrifugal fan. CFD is used to evaluate the performance of different design combinations, while the Taguchi method is used to optimize design parameters. The investigated design parameters are the inlet blade angle (β1), the outlet blade angle (β2), the number of blades (n), and the flow rate (Q). Each of the design factors has three levels, therefore, an L9 orthogonal array was utilized as the design of experiments. Analysis of variance (ANOVA) is used to determine their relative significance. The results show that the optimal combination of design parameters increase the efficiency from 39.79% (the reference) to 63.26%. The CFD simulations for the optimal combination exhibit the improved flow behaviour, which explains the enhanced efficiency. The results show the feasibility of the proposed method for improving the performance of the centrifugal fan.

The Corelation Of Workshop Facilities To The Academic Achievement Of Eleventh Students Welding Engineering In Smaw Subjects Of SMK Negeri 1 Sumatera Barat Reza Ramadhan Prabulingga; Hendri Nurdin; Waskito Waskito; Irzal Irzal
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i2.859

The quality of school education is driven by several factors. These factors encompass school-related elements, pedagogical approaches, learning processes, environmental influences, learning facilities, and the allocation of learning time. It is evident that facilities and infrastructure represent a significant factor in the achievement of students. At SMK Negeri 1 West Sumatra, the Shielded Metal Arc Welding technique subject is used as the criterion for the completion of class 11 students. However, observations indicated that student academic outcomes were not ma11mized. This study explores the correlation between the availability of workshop infrastructure and the academic performance of Class 11 students enrolled in the SMAW (Shielded Metal Arc Welding) technique at SMK Negeri 1 West Sumatra. The investigation employs a correlational method to analyse the data. This study's population comprises 25 students enrolled in the 11th grade Welding Engineering programme, who utilise the Total Sampling Technique. The findings of the product moment correlation analysis demonstrate that the calculated r value of 0.595 exceeds the r table value of 0.396. It is evident that, with a statistical significance at p = 0.001, lower than 0.05, the alternative hypothesis (Ha) is confirmed. Considering the study’s findings, the alternative hypothesis (Ha) is accepted, signifying a robust correlation between workshop facilities and learning achievement. The findings of the analysis yielded a coefficient of determination of 35.4%, indicating that the impact of workshop facilities on student learning achievement is 35.4%. Conversely, a residual of 64.6% is attributed to external factors that were not considered in the study.

PENERAPAN ALAT PENGURAI SABUT KELAPA DI MASYARAKAT NAGARI SUNGAI SARIAK PADANG PARIAMAN Hendri Nurdin; Delima Yanti Sari; Toto Sugiarto; Purwantono Purwantono; Hastuti Hastuti
Devote: Jurnal Pengabdian Masyarakat Global Vol. 5 No. 2 (2026): Devote : Jurnal Pengabdian Masyarakat Global, June 2026
Publisher : LPPM Institut Pendidikan Nusantara Global

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55681/devote.v5i2.5948

Coconut is a plantation commodity that has economic value. The process of stripping coconut grains will leave abundant coconut fiber as waste. Coconut coir waste is partly used by farmer groups in Nagari Sungai Sariak as fuel which causes thick smoke and air pollution so that it becomes a problem and must be resolved. The solution is done by applying a coconut fiber decomposer tool so that creativity and productivity are built. The success of the application of a coconut coir decomposer tool that uses an 8.5 PK diesel motor drive and a 2600 rpm rotation which has a capacity of 51 kg / hour. The effectiveness of the tool reaches 95% in decomposing coconut fiber in a short time. The production of cocofibre is utilized with a touch of advanced processing by the community for guest chair upholstery fillers, foot mat materials and so on. The application of science and technology can have an impact on improving the welfare and empowerment of the community. In addition, building community awareness in Nagari Sungai Sariak has an impact on responsible production within the community.

The influence of processing temperature on the mechanical properties of recycled PET fibers Anna Niska Fauza; Fitrah Qalbina; Hendri Nurdin; Ambiyar Ambiyar; Refdinal Refdinal
Teknomekanik Vol. 6 No. 1 (2023): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v6i1.21472

Study towards the recycling of PET waste has arisen in the last decades. One of the most widely used methods was the mechanical recycling process due to its simplicity and low cost of production. In this research, PET waste obtained from the disposable water gallon containers was used to produce recycled PET fibers for textile applications. The PET fibers were prepared using the extrusion technique by varying the processing temperatures, i.e., 200, 210, 220, 230, and 240°C. The diameter, FTIR analysis, XRD analysis, and mechanical properties of the PET fibers at various processing temperatures were studied. The results showed that the optimum processing temperature for preparing recycled PET fibers was 210°C with a diameter of 0.23 mm, a degree of crystallinity of 8.9%, a tensile strength of 70.4 MPa, and an elongation at break of 83.6%. In conclusion, PET waste shows a promising application to be processed as recycled PET fibers for textile applications.

Evaluation and characterization of charcoal briquettes using damar binder for sustainable energy Hendri Nurdin; Waskito Waskito; Dani Harmanto; Purwantono Purwantono; Andre Kurniawan; Dori Yuvenda; Yoszi Mingsih Anaperta
Teknomekanik Vol. 8 No. 1 (2025): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v8i1.33672

Palm kernel shells have great potential as biomass and renewable energy sources. Its utilization has not been maximized which is only directly burned which causes air pollution. The accumulation of solid waste in the crude palm oil processing industry negatively impacts the environment. The research aims to determine the characteristics and quality of charcoal briquettes with palm kernel shell carbonization. The main findings of this study are the calorific value, water content, volatile matter, ash content, and fixed carbon in palm kernel shell charcoal briquettes with damar binder. The experimental research method was carried out by carbonizing the raw materials of palm kernel shell briquettes, applying various concentrations of damar binder mixtures. The technical parameters of briquette making were 10 MPa pressure, 60 mesh size, and different carbonization temperatures by furnace. The calorific and proximate were empirically measured by using a bomb calorimeter. This research produced palm kernel shell charcoal briquettes with a calorific value of 30.72 MJ/kg at a carbonization temperature of 500oC and concentration of 85%:15%, a moisture content of 5.18%, volatile matter of 32.72%, ash content of 2.81%, and fixed carbon of 57.90%. Palm kernel shell charcoal briquetting technology is potentially a recommended alternative solid fuel. Consequently, developing renewable energy that is environmentally friendly leads to achieve sustainable energy security. By utilizing waste, the negative impacts on the environment can be overcome and energy needs are also resolved.

PENGARUH SIKAP BELAJAR TERHADAP HASIL BELAJAR SISWA PADA MATA PELAJARAN GAMBAR TEKNIK MESIN KELAS XI JURUSAN TEKNIK MEKANIK INDUSTRI DI SMK NEGERI 1 PARIAMAN Doni Kris Saputra; Hendri Nurdin; Refdinal Refdinal; Rifelino Rifelino
Jurnal Vokasi Mekanika (VoMek) Vol 2 No 4 (2020): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Masih kurang maksimal nya hasil belajar siswa yang dapat dilihat ada nya pengaruh sikap belajar. Sikap belajar siswa harus di perhatikan oleh guru, serta kepala sekolah untuk menunjang dunia pendidikan yang berkarakter bagus, jika sikap belajar siswa baik maka nanti hasil nya akan bisa baik juga, sikap belajar siswa merupakan salah satu faktor internal yang berada pada setiap diri siswa. Penelitian ini bertujuan untuk mengetahui pengaruh sikap belajar terhadap hasil belajar siswa pada mata pelajaran gambar teknik mesin kelas XI jurusan teknik mekanik industri di SMK Negeri 1 Pariaman. Penelitian ini menggunakan metode penelitian pendekatan kuantitatif korelasional jenis pendekatan ini yang dapat diukur (dihitung) secara langsung. Pendekatan korelasional yaitu mengetahui pengaruh 2 variabel. Penelitian dilakukan dibulan september sampai oktober pada siswa jurusan teknik mekanik industri kelas XI dengan jumlah populasi 66 siswa.teknik sampling yang dipakai adalah random sampling sejumlah 40 siswa. Data ini diambil dengan menyebarkan angket model likert scale setelah melakukan uji validitas dan reabilitas menggunakan SPSS versi.16. Berdasarkan hasil penelitian pada 66 siswa diperoleh nilai korelasi (r) atau rhitung sebesar 0.297<0.3297 rtabel. Hasil tersebut dapat disimpulkan bahwa tidak terdapat hubungan sikap belajar terhadap hasil belajar pada mata pelajaran gambar teknik kelas XI jurusan teknik mekanik industri di SMK Negeri 1 Pariaman, berdasarkan pedoman tabel interprestasi koefisien korelasi dalam kategori rendah.

PENGEMBANGAN MODUL PEMBELAJARAN PADA MATA PELAJARAN ILMU BAHAN KELAS XI TKN DI SMK NEGERI 10 PADANG Anggar Sulaiman Zega; Purwantono Purwantono; Nelvi Erizon; Hendri Nurdin
Jurnal Vokasi Mekanika (VoMek) Vol 3 No 1 (2021): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Media pembelajaran memiliki peranan penting dalam proses belajar mengajar bagi siswa SMK. Kurangnya media pembelajaran menjadikan belum maksimalnya proses pembelajaran di SMK Negeri 10 Padang khususnya pada mata pelajaran Ilmu Bahan membuat siswa sulit dalam memahani pembelajaran tersebut. Dengan adanya media pembelajaran menggunakan modul diharapkan bisa mengoptimalkan siswa dalam belajar di sekolah. Tujuan penelitian ini untuk mengembangkan media pembelajaran berupa modul pembelajaran. Dalam pengembangan modul pembelajaran ini menggunakan jenis penalitian Researtch and Development yang berpedoman pada model pengenbangan ADDIE. Penelitian ini dilaksanakan pada tahun ajaran semester ganjil. Data dalam penelitian ini berjenis kuantitatif dan kualitatif dengan menggunakan instrument berupa angket yang pada tahap pengembangan dilakukan uji validitas serta uji praktikalitas dimana uji validitas diujikan kepada 3 dosen Pendidikan Teknik Mesin sebagai ahli materi, ahli bahasa dan ahli media, sedangkan pada uji praktikalitas di ujikan kepada 2 guru mata pelajaran dan 4 respon siswa. Uji validitas ahli materi didapatkan nilai rata-rata 65.8%, bahasa memperoleh rata-rata 78.5%, ahli media diperoleh rata-rata 62.8%, dan responden siswa memperoleh rata-rata nilai 85.1%. Hasil dari pengujian didapat bahwa modul pembelajaran Ilmu Bahan yang dikembangkan sangat layak untuk digunakan sebagai media pembelajaran.

ANALISIS KEKUATAN TARIK HASIL SAMBUNGAN PENGELASAN GESEK PADA BAJA ST42 Yusra M. Nur; Rifelino Rifelino; Jasman Jasman; Hendri Nurdin
Jurnal Vokasi Mekanika (VoMek) Vol 3 No 2 (2021): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Friction welding is a method of welding using heat energy generated from friction between surfaces of two ends of workpiece and/or the moving tool blade. Parameters of friction welding include rotation speed, welding time and forging pressure. The advantages of friction welding are savings in fill metal, fast execution time, can join two same or different materials, and produce high strength. This study aims to determine the quality of rotary friction welding joint through tensile test. This study uses an experimental method by performing friction welding based on rotation speed and welding time. Rotation speeds used from 1080 and 1800 rpm, welding times used from 60, 75, and 90 seconds. The specimen used in this study is st42 steel with a diameter of 16mm and a length of 150mm. Tensile test used to find out how tensile strength of friction weld joint. For the highest tensile strength from the results of the weld joint, the speed is 1800 rpm and time of 75 seconds with a value of 41.523Kg/mm2. For the highest tensile strength from the results of the weld joint, the speed is 1080 rpm and time of 60 seconds with a value of 37.913 Kg/mm2.

KEPUASAN MAHASISWA PENDIDIKAN TEKNIK MESIN PADA PEMBELAJARAN DARING MATA KULIAH FISIKA TEKNIK DI JURUSAN TEKNIK MESIN FT-UNP Vani Permata Sari; Ambiyar Ambiyar; Waskito Waskito; Hendri Nurdin
Jurnal Vokasi Mekanika (VoMek) Vol 3 No 3 (2021): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Masalah dalam penelitian ini adalah tidak efektifnya perkuliahan online dan koneksi internet yang tidak menyeluruh dikarenakan oleh aspek geografis mata kuliah Fisika Teknik pada jurusan Teknik Mesin Fakultas Teknik Universitas Negeri Padang. Penelitian ini bertujuan untuk mendefinisikan tingkat kepuasan mahasiswa terhadap pelaksanaan kuliah online disaat pandemi pada mata kuliah Fisika Teknik di jurusan Teknik Mesin Fakultas Teknik Universitas Negeri Padang. Metode yang digunakan adalah kuantitatif dengan jenis penelitian deskriptif kuantitatif. Data yang dibutuhkan pada penelitian ini adalah data primer berbentuk hasil angket. Instrumen yang digunakan dalam penelitian ini berupa angket yang disusun dengan model skala likert. Pengumpulan data dalam penelitian ini yaitu dokumentasi foto berupa screenshot dan angket. Populasi dalam penelitian ini adalah seluruh mahasiswa jurusan Teknik Mesin Fakultas Teknik Universitas Negeri Padang pada angkatan 2020, yang terdiri dari 6 kelas yang berjumlah 87 mahasiswa. Sedangkan sampel dalam penelitian ini adalah dua kelas Fisika Teknik yang berjumlah 71 mahasiswa, pemungutan sampel ini dilaksanakan dengan teknik pemungutan sampel jenuh. Berdasarkan pengolahan data didapati bahwa tingkat kepuasan mahasiswa yang rendah diperoleh dari 45 narasumber (63,4%) dan tingkat kepuasan mahasiswa yang tinggi diperoleh dari 26 narasumber (36,6%). Dengan demikian dapat disimpulkan bahwa perkuliahan Fisika Teknik jurusan Teknik Mesin Fakultas Teknik Universitas Negeri Padang yang dilaksanakan secara online ini tidak efektif untuk dilakukan.

Co-Authors - Primawati A, Affandi A, Yufrizal Abdul Ghani Rahman Abdur Rahman Abimayu, Dimas Addha Ilham Ade Manda Afabek, Randa Algery, Fauzan Ambiyar, Ambiyar Ambyar Ambyar Amri Ramadhan S Anaperta, Yoszi Mingsih Andre Kurniawan Andre Kurniawan Andre Maryonda Andri, Rezky Anggar Sulaiman Zega Anna Niska Fauza Arafat, Andril Ardi, Julio Lukmanul Arwizet Arwizet, Arwizet Arya Rudi Nasution Azmul Fauzi Bagas Santoso Bagas Santoso Budi Priyono Budi Syahri Bulkia Rahim Dani Harmanto Darmawi Darmawi Darmawi Darmawi Dayu Alfaridh Delima Yanti Sari Denda Afri Juliadi Dieter Rahmadiawan Dieter Rahmadiawan Dimas Abimayu Dimas Riadi Dinul, Fadhilah Ikhsan Doni Kris Saputra Dori Yuvenda Dwi Sakti Putra Eko Indrawan Elshaarani, Tarig Erika Afandi Evan Hakiim F, Fadhlurrohman Fadhilah Fadhilah Fadhilah Ikhsan Dinul Fajar Fitra Fathi Aulia DZ Fauza, Anna Niska Fauzan Azima Febri Hanafi Febri Prasetya Fitra, Fajar Fitrah Qalbina Fitrah Qalbina Gifan Ainul Mukhrim Habibie, Farhan Hakiim, Evan Handayani, Meisuri Harahap, Doa Harmanto, Dani Hasanuddin Hasanuddin Hasanuddin WS Hastuti Hastuti Hastuti Hastuti Hendra Irawan Hidayat, Nailul Hudri Fauzun Ilham Rinaldo Putra Imtiaz Ali Laghari Indradewa, Rhian Irshan Sepriza Irzal Irzal Islamimahdi Islamimahdi Jasman Java Danilio Saputra Junil Adri Kassimov, Farid Kenzhaliyev, Bagdaulet Kenzhaliyevich Kenzhaliyev, Elnar khairul umurani Laghari, Imtiaz Ali Lilik Darwito M Febriyan Baruna Putra M Fikri Mansur Mansur Muhamad Thaufiq Pinat Muhammad Firdaus Muhammad Firdaus Muhammad Ikhsan Koto Muhammad Iqbal Iski Muhammad Rizki Mulianti Nabawi, Rahmat Azis Nasruddin Nasruddin Nelvi Erizon Nidya Meliza Putri Niko Adima Brawira Novendri Chairul Nur Ichsan Abdillah Nurhasan Syah Ogif Pradinata Putra Pramudya, Aldhi Primandani, Sri Rizki Putri Primawati Primawati, Primawati Purwantono Purwantono Purwantono, Purwantono Putra, Randi Purnama Rahmad Robby Alzam Rahmadiawan, Dieter Rahmat, Febri Rajul Halim Perdana Ismet Ramadhan, Arya Famas Ramadhan, Ozi Refdinal, Refdinal Refdinal, Refdinal Remon Lapisa Resqy Dwicandra Reza Ramadhan Prabulingga Rifelino Rifelino Riski Camarta Rizky Ema Wulansari Rodesri Mulyadi Rudy Anarta Saddikin, M Saputra, Ilham Dwi Sasma Susanti Sayyid Rasyid Habibie Siregar, Batu Mahadi Sitorus, Purnama Anandi Sri Riski Putri Primandari Sri Rizki Putri Primandari Syahril Syahril Syahril Syahril Syauqi Arjunanda Tarig Elshaarani Toto Sugiarto Tri Ramadhan Tsung-Liang Wu Vani Permata Sari Wagino Wanda Afnison Wari, Alan Waskito Waskito Waskito Waskito Waskito, Waskito Wei-Ting Zhuang Ya, Kyaw Zay Yoga Andika Yolli Fernanda Yoszi Mingsih Anaperta Yufrizal Yufrizal Yusra M. Nur Yusuf Caniago Zainal Abadi Zainal Abadi Zhuang, Wei-Ting

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