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All Journal Jurnal Kompetensi Teknik Jurnal Bahan Alam Terbarukan Jurnal Pendidikan Teknik Mesin Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Sainteknol : Jurnal Sains dan Teknologi Rekayasa Mesin Majalah Ilmiah MOMENTUM Jurnal Rekayasa Mesin Journal of Mechanical Engineering Learning Jurnal Teknik Mesin Indonesia Infotekmesin Jurnal Penelitian Pendidikan Indonesia Journal of Vocational and Career Education Jurnal Pendidikan dan Teknologi Indonesia Abdi Teknoyasa Jurnal Inovasi Pengabdian dan Pemberdayaan Masyarakat Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Penelitian Pendidikan Journal of Vocational and Career Education Jurnal Bahan Alam Terbarukan J-Proteksion : Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Journal of Creativity Student Jurnal Puruhita
Samsudin Anis
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Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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The Effect of KNO3 Addition on the Properties of Coconut Shell Charcoal Briquettes Achmad Erlangga Bintang Samodra; Fitriyana, Deni Fajar; samsudin anis; janviter manalu; Al Ichlas Imran; Januar Parlaungan Siregar; Tezara Cionita
Jurnal Bahan Alam Terbarukan Vol. 14 No. 1 (2025): June 2025 [Nationally Accredited Sinta 3]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v14i1.26289

Abstract

This research investigates the effects of incorporating potassium nitrate (KNO₃) into coconut shell charcoal briquettes, emphasizing their physical and chemical characteristics. Briquettes were manufactured utilizing coconut shell charcoal powder, tapioca flour as a binder, and different concentrations of KNO₃ (0% and 10%) as an additive. The aim was to assess the impact of KNO₃ incorporation on the water content, ash content, volatile matter, fixed carbon, calorific value, and density of the briquettes. The findings indicated that incorporating KNO₃ resulted in elevated water and ash content, adversely affecting combustion efficiency. Briquettes with increased water content demonstrated reduced mechanical strength and inferior combustion performance. The addition of KNO₃ led to an increased volatile matter content, facilitating ignition of the briquettes while simultaneously resulting in higher smoke emissions. The addition of KNO₃ resulted in a decrease in fixed carbon content, which subsequently lowered the calorific value of the briquettes. The formulation without KNO₃ produced the densest briquette, suggesting that including KNO₃ reduced the briquette density. The inclusion of KNO₃ enhances ignition characteristics; however, it concurrently diminishes the briquettes' overall quality regarding combustion efficiency and calorific value. The Briquette B_1 exhibited the highest results in this investigation, with water content, ash content, volatile matter, fixed carbon content, calorific value, and density values of 4.97%, 1.87%, 17.25%, 80.88%, 7014 Cal/g, and 0.90 g/cm³, respectively.
Desain dan Simulasi Elemen Hingga pada Soket Prostesis Transtibial Berbasis 3D Printing Selama Siklus Gaya Berjalan Wicaksana, Yazid Surya; Fitriyana, Deni Fajar; Anis, Samsudin; Ardhianto, Mochamad Marte
Jurnal Pendidikan dan Teknologi Indonesia Vol 5 No 7 (2025): JPTI - Juli 2025
Publisher : CV Infinite Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jpti.891

Abstract

Soket prostesis berperan penting dalam meningkatkan rehabilitas mobilitas pasien pasca amputasi demi mengembalikan pola gaya berjalan mendekati normal. Proses pembuatan soket prostesis memerlukan waktu dan biaya tinggi yang berdampak pada terbatasnya produksi. Teknologi 3D printing menawarkan solusi untuk meningkatkan efisiensi produksi. Namun, saat ini ketersediaan soket prostesis hasil 3D printing masih terbatas, dan penelitian mengenai performa mekanisnya terhadap siklus gaya berjalan belum banyak dilakukan. Dengan demikian, tujuan dari penelitian ini adalah untuk mengevaluasi dan menggambarkan performa material Polyethylene Terephthalate (PET), dan Acrylonitrile Butadiene Styrene (ABS) pada soket prostesis yang produksi melalui 3D printing. Penelitian ini menggunakan pendekatan metode elemen hingga dengan kondisi pembebanan yang mensimulasikan siklus gaya berjalan. Hasil penelitian mengidentifikasi fase heel-strike sebagai kondisi paling kritis selama siklus gaya berjalan dengan distribusi tegangan terpusat pada bagian posterior-distal soket. Material PET unggul dalam ketahanan lebih tinggi dengan faktor keamanan 1,393 dan tegangan von-Mises maksimum 37,65 MPa. Sedangkan, ABS memberikan kemampuan menahan deformasi lebih baik, dengan total deformasi 5,296 mm dan efektivitas biaya lebih rendah. Penelitian ini berkontribusi dalam pengembangan soket prostesis yang dipersonalisasi secara efisien dan aman melalui pendekatan simulasi struktural berbasis numerik, serta menawarkan rekomendasi pemilihan material yang optimal terhadap performa dan fungsionalitas soket prostesis hasil 3D printing.
The Implementation of a Project-Based Learning Jobsheet in Teaching Electrical Systems of Light Vehicle Bodies Afindala, Ajib; Anis, Samsudin; Kusumawardani, Rini
Journal of Vocational and Career Education Vol. 10 No. 1 (2025): July 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jvce.v10i1.30882

Abstract

One of the challenges faced in the recent learning process is that students have low psychomotor competency in learning job sheets related to the electrical systems of light vehicle bodies, such as in the lighting system, power window, sign lamp system, mirror cleaning system, and AC system. The use of unengaging job sheets led to low learning motivation and a decline in students’ psychomotor competencies. This study aimed to investigate the impact of a project-based learning job sheet on enhancing the psychomotor competencies of vocational students in the electrical systems of light vehicle bodies, including components such as the lighting system, power windows, signal lamp system, mirror cleaning system, and air conditioning system. This job sheet incorporated an innovative approach by integrating interactive visuals via QR codes, providing tutorial simulations of electrical systems in light vehicle bodies. This job sheet assisted students in understanding the material while encouraging active participation, collaboration, and high learning motivation. The present study employed research and development (R&D) using the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). The research subject of this study is XI grade students of Light Vehicle Engineering at Vocational (SMK) Gardua Nusantara Karanggawen with applied quantitative approach. The data collection technique used a pre-test and a post-test, with the results analyzed using linear regression through the SPSS application. The validation result of the media and material experts showed that the developed job sheet is very feasible with an average score of 4.83 (scale of 5). The practicality test carried out by the teacher achieved 86.55%, or it was declared as very practical. The jobsheet effectivity was proven through N-Gain significant score in the experimental class, which gained 76.94%, while the control class achieved 26.70%. In conclusion, the project-based learning job sheet is effective in enhancing students’ psychomotor competencies and has become a feasible medium for instruction.
Development of Industry-Based Worksheets in Light Vehicle Engineering Teaching Materials Tamamudin, Mukhammad; Sutopo, Yeri; Supraptono, Eko; Anis, Samsudin
Journal of Vocational and Career Education Vol. 10 No. 2 (2025): December 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jvce.v10i1.30354

Abstract

Developing Industry-Based Job Sheets to Improve Student Competence in Electronic Fuel Injection (EFI) Tune-Up for the Light Vehicle Engineering Program at SMK Miftahul Huda. The main issue addressed in this study is students' low competency exam scores on EFI system materials, which result from the use of conventional learning media that do not meet industry standards. This research used a development research model with the Research and Development (R&D) approach, carried out through several stages: needs analysis, design, expert validation, limited trials, and effectiveness testing. Data was collected via expert validation questionnaires, practical questionnaires completed by teachers and students, and an effectiveness test using a pre-test and post-test control group design. Validation results showed that the job sheet was categorized as “highly valid,” with an average score of 4.85 from both media and material experts. The practicality test indicated that teachers and students rated the job sheet as “highly practical,” with an average score of 91.7%. Additionally, the effectiveness test demonstrated a significant improvement in the experimental class compared to the control class. The experimental class achieved an N-Gain score of 76.23% (high category), while the control class reached only 43.22% (medium category)
Enhancing Digital Competence of Vocational School Teachers Through Website-Based Learning Management System (LMS) Latifah, Ana; Hudallah, Noor; Sutopo, Yeri; Anis, Samsudin
Journal of Vocational and Career Education Vol. 10 No. 2 (2025): December 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jvce.v10i2.31287

Abstract

The digital competence of teachers is a crucial aspect in supporting the success of technology-based learning implementation. However, at SMK Merdeka Ulujami, issues were found regarding the low use of effective digital media in the learning process, mainly due to limited training and the lack of integrated media. This study aims to develop a website-based Learning Management System (LMS) as a solution to improve the digital competence of teachers. This research is a type of R&D with the development model being ADDIE. The LMS was developed using the WordPress platform and the Tutor LMS plugin, designed to support blended learning. The research was conducted at SMK Merdeka Ulujami with a total of 20 teachers as participants. Normality testing was conducted using the Shapiro-Wilk method, which showed normal results. Data analysis used paired sample t-tests and Normalized Gain. The results showed a significant improvement in the digital competence of teachers after using the LMS, with a Normalized Gain score of 0.93 or 93%, which is categorized as effective. Observations and interviews indicated that the LMS helped teachers manage digital classrooms efficiently and in a structured manner. However, challenges remain, especially with older teachers who are less familiar with software, highlighting the need for continuous support.
Development of Articulate Storyline Interactive Learning Media to Improve Light Vehicle Engine Knowledge Sunarto, Sunarto; Anis, Samsudin; Widjanarko, Dwi
Journal of Vocational and Career Education Vol. 10 No. 2 (2025): December 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jvce.v10i2.31537

Abstract

The learning problem of SMK N 1 Petarukan students of light vehicle engineering is the low achievement in understanding light vehicle engine materials. This research aims to develop, analyse the feasibility, practicality and effectiveness of Articulate Storyline learning media in improving students' engineering knowledge. This research uses the ADDIE development model (Analysis, Design,Development, Implementation, and Evaluation). The assessment of the feasibility of the media was carried out by three experts in the material and media, the practicality of the media in the value of 12 educators in this study72 students of class XI TKR SMKN 1 Petarukan. The results of the study show that the media that learning Articulate Storyline was declared feasible and practical. Statistical analysis showed a significant improvement after treatment. From the results of the N-gain test, the experimental class achieved an increase of 56.64% (medium category) compared to the control class of only 20.08% (low category). This shows an increase in student knowledge using the developed learning media. The Articulate Storyline interactive learning media has proven feasible and effective in improving the engineering knowledge of SMK students in light vehicle engineering.
Development of a Virtual Tissue Culture Laboratory to Improve the Cognitive Abilities of Vocational School Students Studying Plant Agribusiness Cholifah, Ayu; Widjanarko, Dwi; Anis, Samsudin
Journal of Vocational and Career Education Vol. 10 No. 2 (2025): December 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jvce.v10i2.32412

Abstract

The problem that arises during tissue culture learning is the limited laboratory facilities. The imbalance between the amount of equipment and the number of students causes the practicum to be carried out in turns for a long time, and is less efficient. The impact is that most students, after being assessed, obtain scores that are not as expected. Due to these problems, efforts are needed to utilize multimedia in virtual laboratories. This study aims to develop a virtual tissue culture laboratory at the Agribusiness Plant and Horticulture Vocational School and analyze the feasibility and effectiveness of the virtual tissue culture laboratory at the Agribusiness Plant and Horticulture Vocational School. This study uses the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) development model. The experimental method used is a one-group pre-test-post-test design, with the selected sample being the XI ATPH class, which has 36 students in the experimental class and 36 students as instrument testing subjects. The results showed that the virtual laboratory was categorized as feasible for tissue culture learning based on assessments by media and material experts. The virtual laboratory was also considered very practical for tissue culture learning. Based on the N-Gain Score calculation, the virtual laboratory improved tissue culture learning outcomes with a high category. This study concludes that the virtual laboratory can overcome the problem of limited practical facilities.
Nozzle Tester Teaching Tool to Enhance Learning Outcomes in Conventional Diesel Engine System for Light Vehicles Hidayatulloh, Choirul Fatah; Khumaedi, Muhammad; Anis, Samsudin
Journal of Vocational and Career Education Vol. 10 No. 2 (2025): December 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jvce.v10i2.31526

Abstract

The nozzle tester, which is commonly used in the automotive engineering program at SMK N 1 Kedungwuni, is in a leaking condition, limiting its effectiveness in supporting learning and consequently affecting student learning outcomes. This issue is the main reason for conducting research on the development of a nozzle tester using a recycled jack, aimed at enhancing the learning of conventional diesel engine systems. This study employs a Research and Development (R&D) approach with the ADDIE model for development. The research method used is a pretest-posttest group design. The findings of the study include: (1) the developed teaching tool was considered feasible by media and subject matter experts, with content validity ratio (CVR), content validity index (CVI), and percentage of agreement (PA) analyses; (2) product trials showed a high level of effectiveness, demonstrated by the Independent Sample t-Test, where the N Gain Score resulted in a significant (2-tailed) value; and (3) the reproducibility coefficient (Kr) and scalability coefficient (Ks) both indicate that the application of the nozzle tester in the conventional diesel engine system learning process is very practical. The conclusion of this study is that the nozzle tester can significantly improve the learning outcomes of conventional diesel engine systems.
Development of a Learning Module for Road and Bridge Design Modeling with Augmented Reality Integration Pratiwi, Wikanti; Qudus, Nur; Anis, Samsudin
Journal of Vocational and Career Education Vol. 10 No. 2 (2025): December 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jvce.v10i2.31758

Abstract

The average learning outcomes of eleventh-grade students in 2024 indicate a disparity between psychomotor skills (88), which are higher, and cognitive skills (83). Augmented Reality (AR)-based learning is expected to have the potential to enhance the conceptual abilities of vocational high school students, who tend to be less developed than their psychomotor skills. The purpose of this study was to analyze the feasibility of the module, evaluate its effectiveness, and assess the improvement of students’ cognitive abilities. This research employed the ADDIE development model (Analysis, Design, Development, Implementation, and Evaluation). The findings revealed that the AR-based module was deemed feasible by both material experts and media experts, with a CVR value of 1. Of the 37 cognitive test items developed, 26 were found to be valid and used in the study, while 11 questions were excluded due to invalidity. The reliability coefficient of 0.854 indicated very high instrument consistency. Based on the N-Gain test, the experimental class recorded an improvement of 0.61 (moderately effective), while the control class achieved only 0.21 (ineffective). These results demonstrate that the AR-based module is more effective in enhancing students’ cognitive abilities compared to conventional learning methods.
Development of Practical Tools Using Computer Power Supply for Light Vehicle Electrical System Learning Aziz, Abdul; Khumaedi, Muhammad; Anis, Samsudin; Supraptono, Eko
Journal of Vocational and Career Education Vol. 10 No. 1 (2025): July 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jvce.v10i2.31866

Abstract

A common issue in the practical learning of light vehicle electrical systems is the inadequate availability of voltage sources, particularly batteries, in terms of quality and quantity. As a result, most students, after being assessed, receive scores that do not meet expectations. To address this issue, an alternative voltage source is needed to replace the battery, ensuring that the practical learning process for the light vehicle electrical system runs smoothly. This study aims to develop a practical tool using a computer power supply to improve the learning outcomes of the light vehicle electrical system. The research employs the ADDIE development model (Analysis, Design, Development, Implementation, and Evaluation). The experimental method used involves a pretest and posttest group, comparing the experimental class and the control class, consisting of 72 students. The results show that the practical tool using a computer power supply has a significant impact on the learning outcomes of the light vehicle electrical system, as analyzed through a one-tailed t-test. Based on N-Gain Score calculations, the tool is effective in improving learning outcomes, achieving high-level results. The conclusion of this research is that the practical tool using a computer power supply can replace the role of a battery as a voltage source in light vehicle electrical system practices.
Co-Authors - Basyirun - Soedartono A. P. Bayuseno Abdul Aziz Abram Puspa Pramudita Achmad Erlangga Bintang Samodra Adhi Kusumastuti Afindala, Ajib Agita Ainur Rizqiyah Agus Prasetyo Agustinus Purna Irawan Agustinus Purna Irawan Ahmad Indra Siswantara Ahmad Khusom Kurniawan Ahmad, Aminullah Ahmad, Aminullah Akhlis Rahman Sari Nurhidayat Al Ichlas Imran Al Ichlas Imran Aldias Bahatmaka Anas, Fahrudin Anwar Johari Ar Rasyid, Moh. Rizal Ardhianto, Mochamad Marte Aryo Baskoro Utomo Atika Atika Azhari, Wildan  Bagas Satria Adjie Pratama Budiandono, Galuh Nur Cahyanto, Septian Eko Cholifah, Ayu Cionita, Tezara Danang, Setio Wardana Dendy Prayoga Dendy Desyandri Desyandri Djuniadi Djuniadi Dwi Widjanarko Dwi Wijanarko Eko Supraptono Etanto Heiliano Wijayanto Faadhil, Muhammad Faadhil, Muhammad Faridah Nur Amalina Fariz Dwijanarko Feddy Setio Pribadi Fitriyana, Deni Fajar Fitroh Miftahul Huda Godham Eko Saputro Gustomo, Gigih Halim, Sonika Maulana Heri Yudiono Hidayatulloh, Choirul Fatah Hilal Rozaq Akbar Hilal Rozaq Akbar I Made Sudana Ibadurrohman Muhammad Taqy Ilham Ariosepto Nugroho Illa Rizianiza Iman Taka, Buyung Indarsih, Fitria Retno Indra Nurul Hidayat Irgi Fahrezi Januar Parlaungan Siregar Januar Parlaungan Siregar Januar Parlaungan Siregar Jefri Semuel Bale Karnowo - Khoiron, Ahmad Mustamil Kuntoro, Tri Latifah, Ana M Burhan R M. Hilman Gumelar Syafei M. Thooriq Anwar Maftukin, M Maftukin, M. Manalu, Janviter Maryanto, Luthfi Eka Maryanto, Luthfi Eka Masugino Miftakhun Nuril Moch. Taufiq Ichsan Mochamad Marte Ardhianto Mochammad Marte Ardianto Mufid, Faishal Muhammad Afrizal Muhammad Bagus Laroybafih Muhammad Bagus Laroybafih Muhammad Khumaedi Muhammad Ziddun Ni’am Mustikawati, Diana Langgeng Na:am, Muh Fakhrihun Najibulloh, Gunawan Muhammad Najibulloh, Gunawan Muhammad Nandang Mufti Natalino Fonseca Da Silva Guterres Ninda Kurniadi Nisriinaa, Choirun Noor Hudallah Nugroho, Rizky Fajar Nur Akhlis Sarihidaya Laksana Nur Qudus P Pramono Pangestu, Pulih Pratiwi, Wikanti Priyantama, Rifqi Dwi Priyatna, Bambang Sugeng Puspitasari, Windy Desti Putra, Naufal Bahy Rahmagandi, Irma Oktariamlati Rahmat Doni Widodo Rini Kusumawardani, Rini Risky Ismail Rizqi Fitri Naryanto Rosidah Rosidah Rozanna Dewi Rr. Poppy Puspitasari Rubai Wijaya, Burhan Rusdarti - Rusiyanto Rusiyanto, Rusiyanto Sardi Sardi SATRIA, ANAS Shofi, Amalia Siregar, Januar Parlaungan Sita Nurmasitah Sonika Maulana Sri Endah Wahyuningsih Sri Endah Wahyuningsih Sugiarto, Dedi Suharno, Muhamad Sujentheran Nair Kalatharan Sukarni Sukarni Sukarni Sunarto Sunarto Suprayogi, Sidiq Suryani, Titin Sus Widayani, Sus Susanto Susanto Suwandi, Fakhri Fauzi Syamsiar, Syamsiar Tamamudin, Mukhammad Taqy, Ibadurrohman Muhammad Tezara Cionita Tezara Cionita Thomas Junaedi Titin Agustina Triyanto, Sandy Ulfah Mediaty Arief Utomo, Okky Husnan Arya Vidiyanto, Bagus Prabowo WAHYUDI Wibowo, Salvo Eka Wicaksana, Yazid Surya Widya Aryadi Wildan  Azhari Wisnu Prayogo Yahya Zakaria Yeri Sutopo Yuris Setyoadi Zaenal Abidin Zainal, Z. A.