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All Journal Turbo : Jurnal Program Studi Teknik Mesin STI Policy and Management Journal Journal of Engineering and Applied Technology Journal of Mechanical Engineering and Applied Technology
Arif Hidayat
Politeknik LPP, Jl. Politeknik LPP 1A Balapan, Yogyakarta 55222
Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis karakteristik aerodinamika telescopic wing dengan konfigurasi sayap flying wing dan glider menggunakan metode pendekatan simulasi CFD Azmi, Azhim Asyratul; Hariyanto, Satriawan Dini; Hidayat, Arif
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1340

Abstract

A telescopic wing is a shape-changing method of the aircraft wing known as the morphing wing system. Wingspan extends capability on telescopic wing increasing the aspect ratio to get a high lift force. The telescopic wing on a flying wing configuration as an external wing and glider wing as an internal wing can be used to increase the coefficient lift (CL) when carrying out special missions. The aerodynamic characteristics using the Computational Fluid Dynamic (CFD) simulation approach is presented. For the 40% internal wingspan, the highest CL increment was 12.9% at a 10o angle of attack. For the 50% internal wingspan, the highest CL increment was 14.9% at a 10o angle of attack. on the 40% internal wing, the highest coefficient drag (CD) increment was 4.7%, and the largest CD increment on 50% internal was 9.5% at the angle of attack of 20o. The pressure distribution along the internal wingspan was uneven from an angle of attack of 15o due to the wing tip vortices of the external wing. Streamline pattern shown a bubble separation from the leading edge at an internal wing root by external wing tip vortices.Keywords: Morphing wing, telescopic wing, flying wing, glider
Applied energy and mass balance optimization re-engineering: case on Industri Gula Glenmore, Ltd. Saptyaji Harnowo; Arif Hidayat; Ramit Gupta
Journal of Engineering and Applied Technology Vol 3, No 2 (2022): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v3i2.52403

Abstract

The Glenmore Sugar Industry, Ltd. is designed for 8000 TCD production or 273 TPH. The process required approximately 136 TPH based on the Steam on Cane (SoC) 50%. As the factory's primary input, Sugar Cane cannot supply 8000 TCD Factory Capacity, so 6000 TCD is chosen as an alternative. After commissioning, a lack of steam for servicing the process occurred because the Turbine at full load required 7,6 Kg/kWh. Desuperheater supports the additional steam for the process, which is only 20 TPH. Meanwhile, the steam from the turbine supplies 84 TPH. The need for 32 TPH must be solved, and a specific strategy should be prepared. The Applied Thermodynamics Re-Engineering is a potential method that can be applied in which the findings show that the deficit of 32 TPH steam for the process can be solved precisely.
Energy balance analysis on Rimbo Dua palm oil Arif Hidayat; Ari Wibowo; Saptyaji Harnowo
Journal of Engineering and Applied Technology Vol 2, No 1 (2021): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v2i1.39630

Abstract

Palm Oil Mill is an industry that uses biomass as an energy generator to run the process. The biomass used is fiber, shells, and empty fruit bunches. Energy efficiency is needed in the process; therefore, it requires energy balance in the power generation system, distribution, and use of energy produced by biomass. PKS Rimbo Duo has a processing capacity of 30 tonnes/hour. Broadly speaking, the energy system at PKS Rimbo Dua includes steam energy production equipment such as boilers and steam and electricity energy conversion equipment in the form of steam turbines and generators (alternators) as well as storage equipment for the expansion of steam energy in the form of opposing pressure storage vessels (BPV). Energy balance analysis is carried out by analyzing data methods obtained from the performance of operating equipment and conducting field surveys and measurements of predetermined parameters, especially in boilers, water treatment, and turbines. Analysis of fuel use is also carried out to determine the quality of the fuel and the potential for steam produced. The result of this research is that the average efficiency of the boiler is 63.23%, which is still below the 73% boiler design. One of the reasons is that the flue gas temperature reaches 260 oC. The steam turbine has an efficiency of 44% isentropically with SSC = 31.9 kg / kWh when compared to the standard norm, the SSC value is still too high. The results of the water analysis also found the P and M alkalinity values, and the water pH was still 9.8. The results of the analysis of these data can be used as a reference for actions whether it is a repair of equipment, replacement of equipment, and improvement of operational parameters.
Rancang Bangun dan Analisis Screen Cutting Machine Guna Meningkatkan Produktivitas Pemotongan Timotius Anggit Kristiawan; Alfiando Satrio Wibowo; Arif Hidayat
Journal of Mechanical Engineering and Applied Technology Vol 1, No 1 (2023): Volume 1 Issue 1 Year 2023 (March 2023)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v1i1.4720

Abstract

The material cutting process can be done with a variety of mechanical power options that can be used, ranging from manual cutting methods that require manual skills, to semi-automatic and automatic cutting that utilize advanced technology to increase efficiency and accuracy. The process of cutting materials at PT Suri Tani Pemuka is still done manually, by relying on the skills of the workers' hands. The impact resulting from the manual cutting process is that the cutting results are not according to the standard size determined by the company, so that there are still many NG products found from the cutting process. Based on these problems, it is necessary to have a solution, namely by designing a screen cutting machine to increase cutting productivity. The methods used in this research include Identification of need, Definition of problem, Synthesis, Analysis and Optimization, Evaluation, and Presentation. The test was carried out to test the quality of the screen cut results. The results obtained from this study are screen cutting machines for cutting screen equipment with an increase in the percentage of successful screen cutting by 33.3% from 50% to 83.3%.
Gap in the Mastery of ICT Soft Skills for Vocational Graduate Workers in Industry: Case Study of LPP Polytechnic Harjanti, Ratna Sri; Puspasari, Dyah; Hidayat, Arif; Purnomosidi, RY Kun Haribowo; Andari, Yuni; Bagaskara, Bagaskara; Romadona, Mia Rahma; Setiawan, Sigit; Budiansyah, Andi; Fachrizal, Fachrizal; Helmi, Rahmi Lestari; Suryadi, Suryadi; Maulana, Syahrizal; Tsuraya, Silmi
STI Policy and Management Journal Vol 8, No 2 (2023): STI Policy and Management
Publisher : National Research and Innovation Agency, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/STIPM.2023.376

Abstract

The COVID-19 pandemic has forced a global shift toward technical and inventive skills to improve job readiness and productivity. Human resources graduates from diploma levels 3 and 4 must respond with has competitively by adding value from soft skills. This can help them compete in domestic and international job markets. These skills are now required for professional acceptance. This study investigates the role of soft skills in learning and using information technology, the internet, and computers to boost individual and organizational efficiency. This study addresses all research questions and objectives using a combination of methods. We collected quantitative data on technology and innovation mastery ability gaps using online surveys. Comprehensive interviews with educational institutions, government agencies, industry representatives, and vocational diploma level 3 and 4 alumni were also conducted for the study. The data showed no statistically significant difference in alumni' technological proficiency between when they study and when they work. This shows that many former students have learned to use soft skills to boost their professional competitiveness and technical ability. ICT skills improve vocational human resources' employability, making them more competitive and competitive with undergraduate graduates. Keywords: Vocational, Soft Skill, Technology, Competencies, productivity, competitiveness
Analysis of the Industry’s Perspective on Digital Competence Vocational Human Resources Mia Rahma Romadona; Andi Budiansyah; Suryadi Suryadi; Maulana Akbar; Fachrizal Fachrizal; Syahrizal Maulana; Ratna Sri Harjanti; Arif Hidayat
STI Policy and Management Journal Vol 11, No 1 (2026): STI Policy and Management
Publisher : National Research and Innovation Agency, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/STIPM.2026.440

Abstract

Industry in the technological era, as an economic driver is highly dependent on resource management especially human resources. Vocational higher education graduates (Diploma 3 and 4/applied bachelor levels) are designed to be ready with specific competency aligned to labor market demands. However, industries continue to report challenges in recruiting vocational graduates who fully their need. This study evaluates the digital competencies of vocational graduates in Indonesia in relation to industry using the European Commission’s Digital Competence Framework (DigComp). A mixed-method design was employed, combining in-depth interview and an online survey in eight digitally oriented companies in Indonesia which was then processed using descriptive statistics and paired sample t-tests. The results show not statistically significant difference (p > 0.05) between industry expectations and graduates’ competencies across the five DigComp dimensions: information digital literacy, communication and collaboration, content creation, security, and problem solving. Further results, graduates can meet technical standards but face recruitment barriers due to deficiencies in soft skills like communication, teamwork, and negotiation. These results confirm the applicability of DigComp in the context of vocational education in Indonesia, but also highlight the need to integrate generic competencies and strengthen structured industry collaboration to support long-term digital workforce development in Indonesia. 
Co-Authors Alfiando Satrio Wibowo Andari, Yuni Andi Budiansyah Azmi, Azhim Asyratul Bagaskara, Bagaskara Budiansyah, Andi Dyah Puspasari, Dyah Fachrizal Fachrizal Fachrizal Fachrizal, Fachrizal Hariyanto, Satriawan Dini Helmi, Rahmi Lestari Maulana Akbar Maulana, Syahrizal Mia Rahma Romadona Purnomosidi, RY Kun Haribowo Ramit Gupta Ratna Sri Harjanti Ratna Sri Harjanti Romadona, Mia Rahma Saptyaji Harnowo Saptyaji Harnowo Setiawan, Sigit Suryadi Suryadi Suryadi Suryadi Syahrizal Maulana Timotius Anggit Kristiawan Tsuraya, Silmi Wibowo, Ari