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All Journal Journal of Physics and Its Applications Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Penamas: Journal of Community Service JSE Journal of Science and Engineering
Budiman, Rizki
Unknown Affiliation
Arts Humanities Astronomy Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Engineering Health Professions Materials Science & Nanotechnology Mechanical Engineering Physics Transportation Other

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Dampak Beban Gempa Terhadap Biaya Struktur Kolom Rumah Tinggal Bertingkat Budiman, Rizki
Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Vol 10, No 1 (2025): Bearing : Jurnal Penelitian dan Kajian Teknik Sipil
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jbearing.v10i1.9631

Abstract

This study analyzes the impact of earthquake loads, represented by Peak Ground Acceleration (PGA), on the construction cost of reinforced concrete columns in two-story residential buildings in Indonesia. Using a numerical simulation approach, the research evaluates four PGA scenarios (0.0155g to 0.7172g) to assess their influence on column design specifications (dimensions, reinforcement) and associated costs. Results indicate that higher PGA values significantly increase internal forces, particularly bending moments (Mx and My), which rise up to 4.1 times at PGA 0.7172g compared to the lowest PGA (0.0155g). Axial forces show a more moderate increase. To resist these forces, column dimensions and reinforcement requirements escalate, with material upgrades (e.g., BJTS-420 steel) necessary for high-risk zones. Cost analysis reveals a near-linear relationship between PGA and construction costs, with a 1.94-fold increase at PGA 0.7172g, driven primarily by material expenses (63% of total costs). The study highlights the economic implications of seismic design, demonstrating that while higher PGA demands elevate initial costs, they are justified by enhanced structural safety and long-term risk reduction. These findings underscore the importance of performance-based design to optimize material use without compromising seismic resilience, providing actionable insights for policymakers and engineers in earthquake-prone regions.
Dose Distribution of Pencil Beam Proton Therapy using Geant4 Simulation for Breast Cancer Treatment Budiman, Rizki; Sutanto, Heri; Tursinah, Rasito; Triadyaksa, Pandji
Journal of Physics and Its Applications Vol 7, No 2 (2025): May 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i2.25067

Abstract

This study aims to obtain a Spread-Out Bragg Peak (SOBP) for breast cancer treatment using proton pencil beams Monte Carlo simulation. Proton beams with 2 MeV energy steps from 70 to 110 MeV were simulated using Geant 4 software to generate the SOBP. The optimization tool Linear Least Squares (lsqlin) was used to configure the proper proton beam weighting fraction. This tool successfully produced SOBPs within a depth range of 4-8 cm, 4-6 cm, and 5-7 cm. Comparison against a trial-and-error approach to creating SOBP by a different study shows that Linear Least Squares (lsqlin) approximation leads to a better SOBP.
Implementation of 5R Culture to Achieve Total Quality Management (TQM) at PT Aneka Dharma Persada Budiman, Rizki; Abma, Vendie; Noviandhini, Ramadhena Putri Ayu; Wibowo, Rangga Pangestu
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30650/jse.v4i1.4519

Abstract

The concept of 'quality' is becoming increasingly recognized across industrial sectors, as evidenced by the emergence of methodologies such as TQM, Kaizen, and Quality Circles. The 5R (Reduced, Refined, Radiant, Retain, Reliable) program, which includes Sort, Set in Order, Shine, Standardize, and Sustain, has become an essential component in enhancing efficiency and quality management within a company. This study aims to evaluate the effectiveness of the 5R program implementation on the achievement of Total Quality Management (TQM). The method of this study is a descriptive approach using a case study design and mixed methods, integrating both qualitative (field observations and interviews) and quantitative data (audit scores and monthly performance metrics). This combination enables a comprehensive evaluation of the 5R program. Data were collected through field observations, in-depth interviews, analysis of audit results, and monthly performance scores from ten work areas. Manufacturing company PT ADP, as a case study, was employed to examine the benefits of the 5R implementation in relation to TQM standards. The findings contribute to practical knowledge by demonstrating that structured implementation of 5R can significantly support Total Quality Management (TQM) in manufacturing settings, particularly in enhancing productivity, discipline, and operational efficiency. The results indicate that the 5R program can support the foundation of TQM by ensuring higher work efficiency, reduced waste, and a more disciplined and responsible work ethic. The 5R culture is essential in supporting the implementation of TQM to improve quality and innovation for sustainable growth, competitiveness, adaptability, and customer satisfaction
Introduction to medical physics: Bridging physics and healthcare Sinaga, Evelyn Pratami; Budiman, Rizki; Nurdin, M. Arif; Manik, Josua T.; Hasdeo, E. H.
Penamas: Journal of Community Service Vol. 6 No. 1 (2026): Penamas: Journal of Community Service
Publisher : Nur Science Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53088/penamas.v6i1.2585

Abstract

Medical physics is a rapidly developing field, with increasing demand for qualified professionals in Indonesia following regulations requiring hospitals to employ medical physicists. This community service program was conducted to introduce high school students to the applications of physics in healthcare and to improve their understanding and perception of physics as an applied and career-relevant discipline. The activity was carried out in collaboration between Matana University and SMA Stella Maris BSD, featuring interactive scientific talks and expert discussions on medical imaging, radiation therapy, and emerging topics in medical physics. Participants were 11th-grade science-track students, and program effectiveness was evaluated using pre-test and post-test assessments. The results showed a clear improvement in students’ understanding of physics applications in healthcare, with average scores increasing from 83.2 to 92.8, representing an improvement of approximately 11.5%. Qualitative feedback further indicated increased student interest in physics and greater awareness of career opportunities in medical physics, biomedical engineering, and healthcare technology.
Co-Authors Abma, Vendie Hasdeo, E. H. Heri Sutanto Manik, Josua T. Noviandhini, Ramadhena Putri Ayu Nurdin, M. Arif Pandji Triadyaksa Rasito Tursinah, Rasito Sinaga, Evelyn Pratami Wibowo, Rangga Pangestu