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All Journal Jurnal Pendidikan Teknologi dan Kejuruan SPEKTRUM: Jurnal Pendidikan Luar Sekolah (PLS) JTEV (Jurnal Teknik Elektro dan Vokasional Journal of Tropical Soils Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) JOIV : International Journal on Informatics Visualization AL ISHLAH Jurnal Pendidikan Sinkron : Jurnal dan Penelitian Teknik Informatika QALAMUNA: Jurnal Pendidikan, Sosial, dan Agama Jurnal Penelitian Pendidikan IPA (JPPIPA) Martabe : Jurnal Pengabdian Kepada Masyarakat JURNAL PENDIDIKAN TAMBUSAI JOURNAL OF SCIENCE AND SOCIAL RESEARCH JRTI (Jurnal Riset Tindakan Indonesia) SCAFFOLDING: Jurnal Pendidikan Islam dan Multikulturalisme JSR : Jaringan Sistem Informasi Robotik Community Engagement and Emergence Journal (CEEJ) Jurnal Pendidikan Teknologi Informasi dan Vokasional At-Tajdid : Jurnal Pendidikan dan Pemikiran Islam Teknomekanik Jurnal Vokasi Mekanika Journal of Community Service Journal of Engineering Researcher and Lecturer Asian Journal of Science, Technology, Engineering, and Art Journal of Innovative and Creativity Jurnal Penelitian Pendidikan Indonesia

Refdinal, Refdinal

Unknown Affiliation

Author-ID : 1108901

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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CRITICAL THINKING SKILLS IN LEARNING PHYSICS: A BIBLIOMETRIC ANALYSIS USING VOSVIEWER Sefriani, Rini; Rahmadani, Ade Fitri; Jalinus, Nizwardi; Refdinal, Refdinal; Novrita, Sri Zulfia; Widyastuti, Rini
AT-TAJDID Vol 7, No 2 (2023): JULI-DESEMBER 2023
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/att.v7i2.3028

Design and Build Minang Music Applications Based on Android Dewi, Ika Parma; Kamil, Fadhil Muhammad; Ambiyar , Ambiyar; Refdinal, Refdinal; Indarta, Yose
Sinkron : jurnal dan penelitian teknik informatika Vol. 6 No. 2 (2022): Articles Research Volume 6 Issue 2, April 2022
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/sinkron.v7i2.11300

Minang music applications are rarely found in the play store. As for some regional music applications that already exist but have many shortcomings such as not having lyrics and some have no features other than playing songs. Based on the data collection, a music application was created which aims to create an application that is not only a music player but also has other features such as viewing lyrics, adjusting the equalizer, having a sleep time feature and a search feature. Minang music application is designed using the waterfall method. The waterfall method is carried out through a systematic approach. Starting from the system requirements stage then to the analysis, design, coding and testing stages. The first aspect is to conduct interview sessions with related communities that are faced when they want to listen to music. In addition, interviews were also conducted regarding what features the community wanted. The second aspect is to compare the existing application with the application to be designed. Later, the application designed to be the right choice by users because it provides various features that are not found in other music player applications, especially for regional music applications. Then proceed with the design of the application which will be made using the android studio software. The resulting application is expected to become a popular application among users because this application is the latest application with complete features. The developed application can also be run when it is online or offline.

Student perspectives toward pre-service teachers competencies Adri, Junil; Ambiyar, Ambiyar; Refdinal, Refdinal; Verawardina, Unung; Efrianova, Vivi; Tanjung, Abrar; Ferdiansyah, Ferdiyansyah; Prima, Fani Keprila
Jurnal Pendidikan Teknologi Kejuruan Vol 3 No 4 (2020): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v3i4.14723

This study aims to determine how students' perceptions of the competence of prospective teachers in the PPLK program at SMK Negeri 1 Padang. Aspects that are observed in basic educational competencies are pedagogic, personality, professional, and social. This research is descriptive research. Observations were made for three years. The population in the study were all class X students of SMK Negeri 1 Padang. Sampling was done using random sampling technique using Slovin's formula. The findings of the study showed that the average competency of prospective teachers in the PPLK program at SMK Negeri 1 Padang for three years of observation was in a good category. The research findings recommend that there is a need for improvement in the pedagogical and social fields of prospective teachers. Teacher readiness to teach will affect the achievement of learning objectives. In addition, social competence is needed to establish communication and interaction between prospective teachers and teachers in schools and students. There needs to be an improvement in learning related to teaching preparation for prospective teachers specifically to emphasize pedagogic and social competencies

Optimizing learning engagement and performance in technical education: Harnessing the power of video tutorials for enhanced motivation and skill development in Shield Metal Arc Welding Subject Hafis, M; Syahril, Syahril; Refdinal, Refdinal; Prasetya, Febri
Journal of Engineering Researcher and Lecturer Vol. 2 No. 3 (2023): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v2i3.112

This study aimed to enhance the quality of Shield Metal Arc Welding instruction in Class XI Welding Engineering at State Vocational High School 1 Bukittinggi through the integration of interactive media videos. Employing a class action research design with saturated sampling, the research findings revealed that the implementation of video tutorials significantly improved student motivation and learning outcomes. The use of video tutorials captured students' interest, resulting in increased motivation for learning Shield Metal Arc Welding. In the initial cycle, student motivation in Class XI Welding Engineering at State Vocational High School 1 Bukittinggi, as measured in meeting I, stood at 54%, indicating a less motivated state. By meeting II of cycle I, the motivation increased to 61%, categorized as moderately motivated. In the subsequent cycle, meeting I recorded a motivation level of 72%, demonstrating a motivated state, while meeting II in cycle II reached 82%, indicating a highly motivated state. Consequently, there was a noticeable progression in student learning motivation from cycle I to cycle II. Furthermore, student learning outcomes in Shield Metal Arc Welding for Class XI Welding Engineering at State Vocational High School 1 Bukittinggi improved when videos were utilized as interactive media. In cycle I, the average student learning outcome was 77.88, categorized as moderate. In cycle II, the average increased to 79.06, reflecting a high level of achievement. This indicates a positive shift in student learning outcomes, moving from moderate to good performance.

Differences Strength of Low Carbon Stainless Steel St 37 with Electrical Welding Compound V Use Materials Add Electrodeof Type-RB and Type -RD Refdinal, Refdinal; Ramli, Ramli; Andesko, Rio
Teknomekanik Vol. 1 No. 1 (2018): Regular Issue
Publisher : Universitas Negeri Padang

This study aims to determine the difference in tensile strength of low carbon steel St 37 which is welded with RB type and RD type electrodes. The welding utilizes the type of a V-shaped joint with an angle of 600. After low carbon steel St 37 is then subjected to a tensile strength test / tensile test to obtain a tensile strength value. This research uses experimental method by preparing the object of research in the form of tensile test specimen which amounted to 19 pieces and separated into 3 groups. Group I was an untreated / non-welded St 37 carbon steel, a Group II of low carbon steel St 37 welded with RB type electrodes, and a Group III of low carbon steel St 37 welded with RD type electrodes. The cooling medium used after welding is air. The tensile test results show that the average tensile strength of low carbon steel St 37 without welding has a tensile strength of 48.02 kg/mm2 with the largest specimen tensile strength of 48.33 kg/mm2 and strength At the low carbon steel welding St 37 using RB type electrode has an average tensile strength of 29.86 kg/mm2 with the tensile strength of the largest specimen of 34.51 kg/mm2 and the tensile strength of the lowest specimen is 25.00 kg/mm2. While on the low carbon steel welding St 37 using RD type electrode has an average power of 31.83 kg/mm2 with the tensile strength of the largest specimen is 34.51 kg/mm2 and the tensile strength of the lowest specimen is 25.81 kg/mm2. Based on the analysis and T test of low carbon steel welding ST 37 using RB type electrode and RD type there is no significant tensile strength difference

Numerical Analysis of Fluid Flow on Cross Flow and Kaplan Turbine Prototype Purwantono, Purwantono; Sidiq, Ahmad Halim; Irzal, Irzal; Refdinal, Refdinal
Teknomekanik Vol. 1 No. 2 (2018): Regular Issue
Publisher : Universitas Negeri Padang

Based on previous research conducted by Purwantono about the utilization of exhaust flow from a conventional cross-flow turbine prototype that was used as an inlet of tubin Kaplan [1]. This research was carried out to see how the exhaust flow velocity of each tubin before and after was combined into one combination turbine. This numerical based study uses the Ansys 18.0 application by inputting a 3D design from a conventional turbine prototype which was used as the material for this study. The results obtained in this study show the average of outlet velocity in the Kaplan turbine that uses a velocity outlet from a cross flow turbine of 0.3 m / s greater when it is combined, which is 8.33 m / s and after being combined to 0.38 m / s. The results of this study are expected to contribute to the development of conventional turbines later

Welding Competence Training at Dropout Youth Refdinal, Refdinal; Ardi, Junil; Purwantono, Purwantono
Teknomekanik Vol. 2 No. 1 (2019): Regular Issue
Publisher : Universitas Negeri Padang

The problem with partners is drop out youth who do not have competence. The condition of the community dropping out of school and working as unskilled labourers has an impact on the low level of public welfare. The distance between the Dharmasraya district and the provincial capital has an impact on the contrast of the quality of education carried out which causes the community to not understand the importance of education. So that some of the human resources in Dharmasraya have become manual labourers in plantations and factories. The purpose of implementing this service activity is to provide a solution to the problems faced by the community, especially for school dropouts. Most of the dropout youths who are junior high school (SMP) level do not have special competencies that make them have added value. The work carried out by this young man is only limited to gardening and does not guarantee economic prosperity. Through this service activity, TIM strives to provide competency in the welding field that can be used to open a business that is much needed by the community. The training activities were designed for 3 days which will be held from October 12 to October 14 2018. The speakers in this activity were Drs. Purwantono, M.Pd, who has a BNSP level I welding certificate and the second speaker is Junil Adri, M.Pd.T who has a BNSP level III welding certificate. On the first day, the speaker will convey the basic concepts in the welding process and demonstrate how to make weld grooves and connect the plate in the welding process. On the second day, the speakers began to invite participants to design products that could be made through welding activities in accordance with the needs of the community. In this activity, TIM directed to make a trellis fence. TEAM began to guide participants in the process of making a trellis. On the third day, the TEAM provided direction on how to weld entrepreneurial opportunities in the field. The chairperson of the service with TIM asked the kenagarian to be able to accommodate the birth of new entrepreneurs for youth who could make independent and productive people.

Hardness Analysis of Stone Breaker Chisel Made of Medium Carbon Steel as a Result of Hardening Using Water Cooling Media Novendra, Alan; Refdinal, Refdinal; Le, Sai Kham
Teknomekanik Vol. 3 No. 1 (2020): Regular Issue
Publisher : Universitas Negeri Padang

Stone chisels produced by blacksmiths which are made using leaf spring steel are often too brittle or fragile so that when they are used, they often occur in the form of cracks and breaks. This study aims to determine the appropriate hardness level for stone chisels. The process is carried out by comparing the hardness level of stone chisels that have been used but still in good condition and those that have been damaged. Broken stone chisels have a high adequate hardness compared to good stone chisels so that damaged stone chisels can be reconditioned to get the right rock chisel hardness. Heat treatment is given to damaged stone chisels to improve the hardness level by normalizing the process to restore the initial mechanical properties of the steel and increasing the hardness of the chisel by heating the steel and then quenching it using water cooling media. Based on the experimental process carried out that the hardness level of a good stone chisel is between 228 HB to 320 HB by heating the duan spring steel to a temperature of 780ºC with a hold time of 10 minutes then cooling it quickly using water and stone chisels can break when it is used because it has a very high hardness.

Developing Flipbook-Based on Competency for Vocational High School Teacher Nasution, Yeni Puspitasari; Rizal, Fahmi; Irfan, Dedy; Refdinal, Refdinal; Sari, Adha Kurnia
AL-ISHLAH: Jurnal Pendidikan Vol 16, No 3 (2024): AL-ISHLAH: JURNAL PENDIDIKAN
Publisher : STAI Hubbulwathan Duri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35445/alishlah.v16i3.5044

This research aims to improve the quality of learning in vocational high schools by strengthening teachers' teaching skills as a learning tool, encouraging innovation in teaching methods and providing a competency development model for vocational school teachers. This research uses research methods (Research Development) with the 4D Define, Design, Development, Disseminate model. This research method provides a systematic approach that includes steps and focuses on the process of developing teacher competency effectively to ensure that the flipbook developed is relevant to practical and contextual needs. The 4D model provides a planned testing and evaluation framework, so that research can provide strong empirical evidence about the success of the learning model being developed. The first stage is to determine the needs and objectives of developing the flipbook, which is then continued by designing the concept and structure of the flipbook in accordance with the curriculum and teaching needs of vocational school teachers. After that, the development team carried out the flipbook development process based on a predetermined design, by carrying out regular trials and revisions. The final step is to socialize the flipbook to vocational school teachers and distribute it to relevant stakeholders. The research results obtained in the media validation test were 86%, material 88% and language 89%. The Practicality Assessment obtained a score of 89% and classical completeness 100%. It was concluded that this medium for developing vocational teacher competency is effective as a reference choice in developing vocational teacher competency.

Inovasi Mesin Pencacah untuk Kegiatan Recycle Sampah Plastik di Kenagarian Maninjau Refdinal, Refdinal; Irzal, Irzal; Yufrizal, Yufrizal; Adri, Junil
Community Engagement and Emergence Journal (CEEJ) Vol. 5 No. 3 (2024): Community Engagement & Emergence Journal (CEEJ)
Publisher : Yayasan Riset dan Pengembangan Intelektual

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/ceej.v5i3.6399

Permasalahan sampah plastik di Kenagarian Maninjau semakin mendesak perhatian, mengingat dampak negatifnya terhadap lingkungan dan kesehatan masyarakat. Untuk menjawab kebutuhan ini, program pengabdian masyarakat dilaksanakan dengan memperkenalkan inovasi mesin pencacah plastik yang dirancang untuk mendukung kegiatan daur ulang sampah plastik secara efektif dan efisien. Mesin pencacah ini diharapkan mampu mengurangi volume sampah plastik, memudahkan proses pengelolaan sampah, serta meningkatkan nilai ekonomis bagi masyarakat melalui pengolahan limbah plastik menjadi bahan baku produk baru. Program ini melibatkan proses pembuatan, pelatihan, dan pendampingan penggunaan mesin pencacah bagi masyarakat setempat. Metode pengabdian mencakup tahap perencanaan, pelatihan teknis, dan evaluasi keberhasilan program melalui pengukuran efektivitas mesin dalam mengurangi limbah plastik. Hasil program menunjukkan peningkatan signifikan dalam kapasitas daur ulang sampah plastik serta memberikan dampak positif terhadap kesadaran masyarakat dalam menjaga lingkungan. Dengan inovasi ini, diharapkan Kenagarian Maninjau dapat menjadi model dalam pengelolaan sampah plastik berbasis masyarakat yang mandiri dan berkelanjutan

Co-Authors A, Yufrizal Abdul Aziz Abdullah, MT, Dr. Rijal Abrar Tanjung Adzkia, Mhd Safiq Afriza Media Albasyit, Muhammad Ravi Alfarizi, Diki Ambiyar, Ambiyar Andesko, Rio Andre Kurniawan Anwar, M Ardi, Junil Arif, Chandra Armansyah Armansyah Arwizet Arwizet, Arwizet Aspar, Fathir Aswardi Aswardi Azis, Ismail Berliansyah, Aqilvin Budi Syahri Chandra, Rofi Dedy Irfan Delima Yanti Sari Dinul, Fadhilah Ikhsan Donny Fernandez Dori Yuvenda Edidas , Edidas Efrianova, Vivi Elfi Tasrif Erizon, Nelvi Fadhilah Fadhilah Fadhli Ranuharja Fadillah, Fikri Fahmi Rizal Fani Keprila Prima Fauza, Anna Niska Febri Prasetya Ferdiansyah, Ferdiyansyah Fiandra, Y A Fiki Efendi Firdaus, Jeri Rizal Firdaus, Novemli Fitrah Qalbina Ganefri . Giatman, M Gusnita, Wiwik Hafis, M Hamdani Hamdani Hamizum, Bestra Haris, Zainal Abdul Hasan Maksum Herisvan Hendra Hilman, Antoni Ika Parma Dewi Indarta, Yose Irzal, Irzal Jalinus, N Jalius, Nizwardi Jasman Jasman Junil Adri Kamil, Fadhil Muhammad Kandena Putra, Tegar KRIKORIAN, MIHAEL Le, Sai Kham Lili Dasa Putri Maiyana, Efmi Mardizal, Jonni Muhammad Anwar Mulianti Murni Astuti Muskir, Mukhlidi Mustakim, Waradzi Nanda, Iffarial Nasution, Yeni Puspitasari Nizwardi Jalinus Novendra, Alan Novrita, Sri Zulfia Nurdin Hendri Nurmansyah, Ridho Prasetyo, Vicky Primandari, Sri Riski Putri Primawati Primawati, Primawati Purwantono, Purwantono Putra, Dino Adi Putra, Randi Purnama Rahma Putri, Nadia Suci Rahmadani, Ade Fitri Ramli Ramli Randa Afabek Remon Lapisa Rifelino Rifelino Riki Saputra, Riki Rini Widyastuti Rozandi, Azel Saputra, Firman Omni Sari, Adha Kurnia Sefriani, Rini Sidiq, Ahmad Halim Sri Rizki Putri Primandari sudiani, yoni Syahril Syahril Syamsu, Azhari Tamara, Yolanda Ta’ali, Ta’ali Unung Verawardina, Unung Usmeldi Usmeldi Utari, Nadia Wagino Waradzi Mustakim Waskito Waskito, Waskito Winda Lestari Siregar Yolli Fernanda Yuberta, Andre Yufrizal Yufrizal, Yufrizal Yulnafatmawita Yulnafatmawita

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