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INDONESIA
INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Published by Universitas Negeri Padang
ISSN : 14113414     EISSN : 25499815     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Transportation
INVOTEK: Jurnal Inovasi Vokasional dan Teknologi is a double blind peer-reviewed journal for Technical, Vocasional, Education and Training (VET) related research. This journal provides full open access to its content on the principle that making research freely available to the science community and the public supports a greater global exchange of knowledge and the further development of expertise in the field of Vocational Education and Training (understood in a wide sense and also known as e.g. TVET Technical Vocational Education and Training, Professional Education and Training, Career and Technical Education, Workforce Education).
Arjuna Subject : Umum - Umum
Articles 230 Documents
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Evaluation Inclusive Education in Higher Education: Development and Implementation of Assessment Indicators Zadry, Hilma Raimona; Huda, Ashila Nurul; Susanti, Lusi; Fitri, Sri Rahmah
invotek Vol 25 No 1 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i1.1250

Abstract

The 1945 Constitution of Indonesia ensures education access for all citizens. Law No. 19 of 2011 ratifies the Convention on the Rights of Persons with Disabilities (CRPD), emphasizing inclusive education. Despite efforts by several universities, including Universitas Andalas, challenges remain. A preliminary survey with five students with disabilities at Universitas Andalas identified barriers such as communication difficulties, limited library resources for the visually impaired, and inadequate public facilities. However, no formal research or evaluation indicators have been developed to assess the university's inclusivity. This study aims to develop self-evaluation indicators for improving inclusive education at Universitas Andalas. Using qualitative and quantitative methods, it examines challenges, formulates evaluation indicators, and assesses implementation. The proposed indicators cover seven aspects: institutional policies, admissions, learning, socio-psychological support, physical accessibility, graduate preparedness, and teaching methods. The evaluation results highlight institutional policies, social support, and learning methods as the strongest aspects, whereas physical accessibility scores the lowest. Universitas Andalas attained a self-evaluation score of 483, categorizing it as "Moderately Inclusive." Key recommendations include improving infrastructure such as accessible dining areas, specialized learning tools, laboratories, and libraries. Additional measures include career training programs, inclusive teaching workshops for faculty, periodic policy updates, and enhanced counseling services. These improvements aim to establish Universitas Andalas as a more disability-friendly institution, ensuring equal opportunities for all students.
Application of Rescaled Adjusted Partial Sums (RAPS) Method in Validation of Traffic Management Risk Analysis Data in Large Cities in Indonesia Oktaviani, Oktaviani; Purnawan, Purnawan; Yossyafra, Yossyafra; Adji, Bayu Martanto
invotek Vol 25 No 1 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i1.1265

Abstract

This study examines the application of the Rescaled Adjusted Partial Sums (RAPS) method in validating traffic management risk analysis data in the category of large cities in Indonesia. The RAPS method is used to test the consistency and reliability of data that is the basis for traffic management risk analysis, so that it can ensure the validity of the risk assessment results. Data validation is very crucial in traffic management risk analysis to ensure the accuracy and reliability of the analysis results that are the basis for decision making. In order for the implementation of traffic management to be in accordance with the goals and objectives, traffic management analysis is needed to minimize the risk of failure of the implementation. Traffic management risk analysis in this study uses the Failure Modes, Effects and Criticality Analysis (FMECA) method. The data used are based on the results of filling out questionnaires from respondents, in the form of an assessment of three components, namely severity, occurrence, and detection for four indicators (road capacity, side obstacles, traffic conflicts, and traffic signs/markings) which have sub-indicators of the existing negative impacts. The data were validated to see the consistency of the data provided by respondents using the RAPS method. The results of the validation test using the RAPS method show that the data from the assessment of three components for four indicators that have sub-indicators of negative impacts are valid. And the test results show that the RAPS method is effective in identifying consistent and inconsistent data, thereby improving the quality of risk analysis data validation. With better validation, traffic management risk analysis can be carried out more precisely and efficiently.
Evaluasi Kesiapan Laboratorium Elektronika Kejuruan Menghadapi Industri 4.0: Analisis Fasilitas, Sistem, dan Sumber Daya Manusia Yudha, Irvan; Rochayati, Umi; Salimah, Zahrotun
invotek Vol 25 No 1 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i1.1274

Abstract

This study aims to evaluate the readiness of electronics engineering laboratories in Vocational High Schools (SMK) of Sidoarjo Regency in facing the demands of the Industrial Revolution 4.0. The evaluation focused on four main aspects: laboratory planning, equipment availability, maintenance and management systems, and the competence of laboratory personnel. This study used a descriptive method with a mixed-method approach, involving six vocational schools and respondents from productive teachers, vice principals in the field of infrastructure, and laboratories. Data was obtained through questionnaires, observations, documentation, and in-depth interviews, then analyzed descriptively. The results showed that the average equipment readiness rate was in the "underprepared" category (54.1%), while most schools did not have certified laboratories. Laboratory management is generally still partial and is not systematic, although the usefulness of the laboratory is highly related on by teachers with an average score of 54.4 out of 64. These findings indicated a gap between the availability of facilities, human resource competencies, and the demands of industry-based vocational learning 4.0. The limitations of this study lie in the limited scope of the area and it has not measured the direct impact on student learning outcomes. The practical implications of this study included the importance of strengthening collaboration among schools, industry, and the government in laboratory planning, improving practice facilities, and training and certification of laboratory personnel. Socially, laboratory modernization is an important foundation in producing adaptive and competitive vocational graduates. This study makes an original contribution to mapping the systemic readiness of vocational laboratories in Indonesia.
Analysis of Biomass Briquettes Made from Rubber Seed Shells and Acacia Sawdust with Variation in Material Composition Percentage Alfian, Devia Gahana Cindi; Sindhu, I Gede Pande Naraya; Paundra, Fajar; Silitonga, Dicky Januarizky; Nugraha, Andhyka Tyaz
invotek Vol 25 No 2 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i2.1209

Abstract

Indonesia is reducing reliance on fossil fuels by expanding renewable energy, including biomass from rubber-plantation residues and acacia wood. This study evaluates briquettes made from rubber seed shell (RSS) and acacia sawdust (AWS) using 10% tapioca binder, a compaction pressure of 50 kgf cm⁻², and drying at 100 °C for 3 h. Three compositions (RSS:AWS, %wt) were tested: A (50:50), B (70:30), and C (80:20). The best performance was obtained for C (80:20), with moisture 7.40%, volatile matter 9.56%, ash 4.47%, fixed carbon 85.95%, HHV 6,716.88 cal g⁻¹ (28.10 MJ kg⁻¹), and burn rate 0.10 g min⁻¹. All compositions satisfied SNI 01-6235-2000 limits for HHV (≥ 5,000 cal g⁻¹), VM (≤ 15%), and ash (≤ 8%); the moisture criterion (≤ 8%) was met by B and C. For context, SNI 1683:2021 (wood charcoal, not briquettes) imposes stricter thresholds; under these, C is closest to First-Quality ranges, while A and B fall short for several parameters. Overall, increasing the RSS (char) fraction produced briquettes with lower moisture and VM, higher fixed carbon and HHV, and steadier combustion suitable for household fuel.
Automatic Pre-Starting of Oil-Waste Fueled Stove Based on Microcontroller and HMI Risfendra, Risfendra; Pulungan, Ali Basrah; Parmanoan, Durain; Prayoga, Noval
invotek Vol 25 No 2 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i2.1271

Abstract

The utilization of waste oil as an alternative cooking fuel is limited by its complex ignition process, which requires preheating to reduce viscosity and ensure stable combustion. Conventional methods, such as burning tissue paper, are unsafe, inefficient, and impractical, hindering broader adoption. This study presents the development of an automatic preheating system for waste oil stoves using an ESP32 microcontroller and HMI with TFT LCD display. The system integrates a thermocouple sensor for accurate real-time temperature monitoring and an automatic cut-off mechanism to halt fuel supply during ignition failure, and includes a buzzer for audible alarms during safety shutdowns to improving operational safety. The ignition sequence employs LPG as a preheater before automatically switching to waste oil at the optimal temperature, with programmed control of the blower, igniter, and valves. Experimental results showed thermocouple measurement accuracy with an average error of 4% and high reliability in fuel transition, except at low initial temperatures (31°C and 42°C) where insufficient heating time resulted in high viscosity and transition failure. The safety system effectively prevented hazards, while the HMI provided precise control and monitoring of actuators and combustion conditions. Overall, the proposed system enhances the safety, reliability, and practicality of waste oil stoves and demonstrates potential for industry innovation and renewable energy applications. Nevertheless, the system still requires LPG for the preheating stage and continuous electrical power, which can reduce effectiveness and make it harder to use in mobile or areas without electricity.
Improving Young Riders’ Situational Awareness Through Driving Simulation: A University-Based Study in Indonesia Shulima, Attalarik; Susanti, Lusi; Zadry, Hilma Raimona; Huda, Ashila Nurul
invotek Vol 25 No 2 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i2.1247

Abstract

Motorcycle-related crash remain a major concern among university students in Indonesia. This study investigates situational awareness (SA) among novice motorcyclists at Universitas Andalas (UNAND) and evaluates the effectiveness of a simulation-based training intervention. Using the QUASA (Quantitative Analysis of Situational Awareness) method, baseline and post-training assessments were conducted to measure SA accuracy. The simulation module, developed using Unreal Engine and AI-assisted audio feedback, presented realistic traffic scenarios designed to enhance cognitive engagement. Findings indicate a substantial improvement in SA, with actual awareness scores increasing by approximately 30 percentage points post-intervention. Perceived accuracy also showed measurable gains. Despite a small simulation sample, results suggest that immersive training improves hazard perception and rider decision-making. These outcomes emphasize the value of technology-enhanced learning in addressing safety risks among young riders. Further research with control groups and larger samples is needed to generalize findings. Ethics clearance, data availability, and conflict of interest disclosures have been included.
Utilizing Path Analysis to Examine the Influence of Internship Experiences and Work Information Mastery on VHS Students’ Work Readiness Sari, Darti Purnama; Kamil, Insan; Dewi, Ifti Luthviana; Setiawan, Oki; Manalu, Haposan Vincentius; Adriani, Siti; Sasniati, Popi
invotek Vol 25 No 2 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i2.1270

Abstract

This research investigates how internship experience and work information mastery influence vocational students’ work readiness, with work motivation acting as a mediating factor. The research population comprises all twelfth-grade students majoring in Mechanical Engineering at a Vocational High School in Yogyakarta, Indonesia, totaling 310 individuals. The maximum sample of 170 students was determined using Issac & Michael’s formula. The sample was selected through purposive sampling techniques, and data were collected using questionnaires, tests, and documentation. Descriptive statistical analysis was employed to summarize the characteristics of each variable, while hypothesis testing was conducted using path analysis in an ex-post facto research design. The results indicate that the proposed research model satisfies both validity and reliability tests, thus validating the suitability of the model. The findings reveal: (1) a significant indirect effect between internship experience and work readiness mediated by work motivation (t = 3.787, sig. 0.000), and (2) a significant indirect effect of work information mastery and work readiness through work motivation (t = 2.907, sig. 0.003). The results of the study indicate that internship experience and mastery of information through work motivation influence students' job readiness. The implication of this research is that schools need to increase collaboration with industry and strengthen the role of teachers, parents, and the Community Empowerment Agency (CEA) in providing information and guidance about the world of work, so that vocational high school graduates are better prepared and more easily accepted into the workforce.
Vocational Education Implementation in Mechanical Integrity: SKID Tank Testing and Occupational Safety Standards Hanif, Yafi Nur; Pramono, Agus; Irawan, Anton
invotek Vol 25 No 2 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i2.1285

Abstract

This study assessed the operational feasibility of a horizontal cylindrical pressure vessel used for liquefied petroleum gas (LPG) storage at PT. XYZ in Yogyakarta. The evaluation included data collection, visual inspection, thickness measurement, and the calculation of the Maximum Allowable Working Pressure (MAWP) following the ASME Section VIII Division I-UG-27 standard. Results indicated that the vessel’s actual shell thickness of 14.8 mm exceeded the minimum required thickness of 14.66 mm, and the head thickness of 16.4 mm was above the required 14.57 mm, confirming structural adequacy. The calculated MAWP for the cylindrical shell was 1.78 MPa (18.14 kg/cm²) and 1.99 MPa (20.29 kg/cm²) for the ellipsoidal head—both higher than the design pressure of 1.765 MPa (18 kg/cm²). Additionally, hydrostatic testing at 23.40 Kg/cm² (about 30% above the design pressure) showed no leakage or deformation, validating the vessel’s mechanical integrity. Additionally, the unit complied with Occupational Safety and Health (OHS) dan pressure vessel design regulations, ensuring its safety for continued use. This research underscores the importance of vocational education in technical engineering, particularly in pressure vessel testing and adherence to safety standards. By integrating comprehensive training, professionals are better equipped to ensure the structural integrity and safe operation of pressure vessels in industrial settings. The study provides essential insights into maintaining safety and operational efficiency in pressure vessel applications.
Analysis of Air Flow Characteristics on a Savonius Wind Turbine Next to a Building through CFD Simulation Aulina, Audha Fitrah; Hasbiyati, Haning
invotek Vol 25 No 2 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i2.1294

Abstract

Urban environments pose significant challenges for wind energy utilization due to highly complex, non-uniform, and turbulence-dominated airflow around buildings. Although the Savonius vertical-axis turbine is capable of operating under such conditions, its performance remains highly sensitive to installation placement and configuration. This study conducts a two-dimensional CFD investigation to evaluate the aerodynamic behavior of two tandem-arranged Savonius turbines mounted adjacent to a wall. Two blade-orientation configurations are assessed: Configuration 1, where the returning blades face each other, and Configuration 2, where the advancing blades are adjacent. Transient simulations employing a validated CFD framework with the Realizable k-ε turbulence model are performed at a 7 m/s inflow velocity across a range of tip speed ratios. The results reveal pronounced wall–flow interactions characterized by flow deflection and blockage effects. Configuration 2 demonstrates superior aerodynamic performance, achieving a higher maximum power coefficient over a broader TSR range. This improvement is attributed to a favorable “nozzle effect” generated between the advancing blade of the front turbine and the wall, which accelerates the incoming flow toward the rear turbine and enhances its inflow conditions. In contrast, Configuration 1 exhibits stronger wake interference and more severe blockage, particularly at higher TSR values. Overall, the findings indicate that an adjacent advancing-blade arrangement optimizes aerodynamic interaction and energy extraction for wall-mounted tandem Savonius turbines, offering valuable insights for the design of small-scale urban wind energy systems.
Comparative Assessment of Deterministic and Probabilistic Load Flow Under Solar Irradiance Variability in PV-Integrated Distribution Networks Astrid, Erita; Simamora, Yoakim; Solihin, Muhammad Dani; Suryanto, Eka Dodi; Salman, Rudi
invotek Vol 25 No 2 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i2.1302

Abstract

The increasing penetration of photovoltaic (PV) generation in modern distribution networks introduces considerable uncertainty due to the inherently fluctuating nature of solar irradiance. These fluctuations directly affect PV output power, resulting in significant variations in bus voltages, feeder currents, and power losses. Traditional deterministic load flow (DLF) analysis, which assumes fixed PV generation, is unable to capture this stochastic behavior and therefore may lead to inaccurate estimation of system conditions. This study presents a comparative assessment between deterministic load flow using the Backward–Forward Sweep (BFS) method and probabilistic load flow (PLF) based on Hong’s Two-Point Estimate Method (PEM) to evaluate the impact of solar irradiance variability on the performance of PV-integrated distribution networks. Solar irradiance data are statistically characterized to obtain the mean and variance, which are then propagated into PV output power through a linear irradiance–power conversion model. The IEEE 34-bus radial distribution system is used as the test network, with multiple PV units installed at selected buses. The results show that deterministic analysis underestimates voltage deviations and fails to capture the range of power losses induced by PV uncertainty. In particular, the deterministic BFS solution yields a single operating point with real and reactive losses of 0.1582 MW and 0.0479 MVar, whereas the probabilistic 2PEM produces mean losses of 0.105 MW and 0.031 MVar with standard deviations of 0.057 MW and 0.016 MVar, respectively. In contrast to the fixed deterministic voltage curve, probabilistic voltage profiles form a bounded envelope around it, indicating non-negligible downstream voltage variability driven by irradiance fluctuations. Overall, the findings confirm that solar irradiance variability substantially influences distribution system performance, and incorporating probabilistic assessment is essential for more realistic, risk-informed planning and operation of PV-integrated distribution systems.

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