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All Journal POSITRON Jurnal Pendidikan Fisika Indonesia JIPF (Jurnal Ilmu Pendidikan Fisika) Jukung (Jurnal Teknik Lingkungan) Journal of Applied Engineering and Technological Science (JAETS) Innovative: Journal Of Social Science Research
Sahroni, Taufik Roni
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Agriculture, Biological Sciences & Forestry Humanities Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Physics Public Health Other

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Hawking Temperature Modification and the Physical Dynamics of Black Holes: A Study of the Influence of Internal and Cosmological Variables Sahroni, Taufik Roni; Sinaga, Goldberd Harmuda Duva; Jaya, Pratama; Purwanto, Romdhon; Muhlis, Dasep; Siagian, Ruben Cornelius
JIPF (Jurnal Ilmu Pendidikan Fisika) Vol 9, No 2 (2024): May 2024
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/jipf.v9i2.4647

Abstract

The main objective of the study is to develop a model that modifies the traditional Hawking temperature by considering the influence of internal variables such as radius, mass, electric charge, angular momentum, and cosmological constant. The research method involves mathematical analysis and computational modeling based on the modified Hawking temperature equation. The results show that the modified Hawking temperature produces non-linear corrections that show the interaction between black holes and the quantum structure of spacetime. graphical representations visualize the variation of Hawking temperature with changes in area, electric charge, angular momentum, and cosmological parameters. The implications of the research extend to the understanding of the thermal properties of black holes in the context of gravitational and quantum theories. The research identifies gaps in the knowledge of the effects of cosmological parameters on black hole thermodynamics and introduces Hawking temperature modifications that have not been mapped in detail before. The study concludes that the Hawking temperature modification provides a strong foundation for further research in black hole physics, particularly in the effect of physical and cosmological parameters on the thermal properties of black holes.
PERANCANGAN KEMASAN INDUSTRI OTOMOTIF BERKELANJUTAN UNTUK MENJAGA LINGKUNGAN Adriyanti, Aissyah Lathifah; Sahroni, Taufik Roni
Jukung (Jurnal Teknik Lingkungan) Vol 10, No 2 (2024)
Publisher : Program Studi Teknik Lingkungan Fakultas Teknik Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jukung.v10i2.20682

Abstract

Aki mobil memiliki pasar yang luas dan diterima dengan baik oleh konsumen. Dengan umpan balik positif dari konsumen, industri otomotif berusaha meningkatkan kualitas produknya, yaitu kemasan. Tujuan dari penelitian ini adalah untuk menciptakan desain yang meningkatkan kepuasan pelanggan di industri otomotif, sehingga perusahaan dapat meningkatkan penjualan dan memperluas segmen pasar melalui tingkat kepuasan pelanggan. Penelitian ini menerapkan Desain Berbantuan Komputer 3D (CAD) dan melakukan Analisis Keberlanjutan kemasan berbahan corrugated paper menggunakan SolidWorks 2021 untuk menjaga lingkungan. Kriteria desain mengutamakan bahan ramah lingkungan, ergonomi, daya tahan, keandalan, dan kemudahan penggunaan. Secara keseluruhan, studi ini merekomendasikan penggunaan corrugated paper untuk kemasan aki mobil di industri otomotif. Corrugated paper terbukti sebagai bahan yang ramah lingkungan dan berkelanjutan yang memberikan perlindungan yang sangat baik bagi aki mobil dan mudah untuk ditangani dan digunakan. Hasil yang diperoleh dengan desain baru ini lebih baik daripada desain sebelumnya atau yang sudah ada.
Approximative Relationship Between The Energy Function (E) and Hubble Function (H) in Cosmology: Practical and Theoretical Analysis Sahroni, Taufik Roni; Pandara, Dolfie Paulus; Wibowo, Arnowo Hari; Alatif, Yahya Halim; Wardana, Febriansyah; Kasim, Mohd Shahir; Siagian, Ruben Cornelius
Jurnal Pendidikan Fisika Indonesia Vol 20, No 1 (2024)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v20i1.43488

Abstract

This research delves into the approximate relationship between the energy function (E) and the Hubble function (H) within cosmological. Utilizing the Friedmann equation, it establishes a link between the universe's scale factor and the Hubble function. Through Taylor series approximation, the study derives an approximation of the energy function, under specific assumptions and approximations. Asymptotic analysis investigates the behavior of variables y and s, shedding light on function limits and behaviors. The study incorporates an interactive 3D scatter plot visualization to elucidate the relationship between cosmological parameters and physical systems, aiding in a comprehensive understanding of dynamics. Practical recommendations emphasize increasing data points for accuracy and validating with observational data, while theoretical suggestions advocate exploring higher-order terms and considering additional physical factors.
Innovation Design Concept Of Labeling Mechanism To Improve Productivity Putri, Phoebe Cathlya Ismanto; Noor, RR Afrida; Nirwanty, Vica Putri; Sahroni, Taufik Roni
Innovative: Journal Of Social Science Research Vol. 3 No. 5 (2023): Innovative: Journal of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Proses industri harus dilihat sebagai suatu siklus yang mengupayakan perbaikan terus-menerus untuk mencapai tujuan yang diharapkan dan meningkatkan produktivitas pekerja, seperti proses pelabelan. Tulisan ini memfokuskan usulan rancangan alat pelabelan semi otomatis untuk meningkatkan produktivitas kerja proses pelabelan yang lebih efektif dan efisien. Penelitian ini menggunakan kuesioner kepada pengguna individu untuk mengumpulkan kebutuhan pelanggan. Hasil analisis menentukan acuan dalam perancangan alat inovasi dengan mengedepankan faktor-faktor seperti fungsi, kemudahan, harga, multifungsi, keamanan. Metode Simple Additive Weighting (SAW) digunakan untuk menyelesaikan pemilihan desain. Penelitian ini menemukan bahwa kombinasi material akrilik dan kayu dinilai lebih tepat berdasarkan analisis struktur. Selain itu, alat inovasi ini telah dikembangkan menggunakan rapid prototyping dan melakukan perbaikan proses yang signifikan seiring dengan peningkatan efisiensi dan efektivitas produktivitas kerja serta penghematan waktu proses pelabelan sebesar 50%.
Design of A Digitalization System for Machine Scheduling and Allocation in Flexible Job Shop Heavy Equipment Manufacturing Industry Karim, Mohammad Alfin; Sahroni, Taufik Roni
Journal of Applied Engineering and Technological Science (JAETS) Vol. 7 No. 1 (2025): Journal of Applied Engineering and Technological Science (JAETS)
Publisher : Yayasan Riset dan Pengembangan Intelektual (YRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/jaets.v7i1.5089

Abstract

This study aims to develop a digitalized scheduling system based on the Flexible Job Shop (FJS) model to optimize production efficiency in the heavy equipment manufacturing industry. The heavy equipment manufacturing industry faces significant challenges in achieving production efficiency due to its high-mix, low-volume (HMLV) nature and the complexity of production processes. The research follows a structured approach, beginning with Focus Group Discussions (FGDs) to gather stakeholder requirements. These requirements are translated into a House of Quality (HoQ) matrix to prioritize features for the dashboard. A literature review identifies optimal scheduling methods, with a focus on FJS and heuristic scheduling rules. The dashboard is developed using JavaScript, PHP, Node.js, and PostgreSQL, and deployed on Amazon Web Services (AWS). The system undergoes black-box testing to ensure functionality and reliability before implementation. The study identifies the Earliest Due Date (EDD) method as the most effective scheduling approach, with an average delay of 3.2 days, utilization of 29%, and completion time of 14.33 days. The implementation of the digitalized scheduling system increased on-time production from 70.56% to 92.8% and improved production achievement from 92.78% to 97.4%. The dashboard application successfully integrates real-time data, adaptive scheduling, and operational features, such as a start-stop system and machine load recommendations. The findings highlight the importance of digital transformation in manufacturing, particularly in optimizing resource allocation, reducing delays, and improving production efficiency. This research contributes to the field of digitalized scheduling and real-time production management by providing a practical, data-driven solution tailored to the HMLV characteristics of heavy equipment manufacturing.
Numerical Analysis of Metric Perturbations, Spacetime Curvature, and Gravitational Wave Polarizations in Linearized General Relativity Using the Finite Difference Method Ariefka, Reza; Siagian, Ruben Cornelius; Sahroni, Taufik Roni; Nurahman, Arip
POSITRON Vol 16, No 1 (2026): Vol. 16 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v16i1.92372

Abstract

The general theory of relativity states that small perturbations in the spacetime metric in a weak gravitational field can be treated as perturbations propagating on the Minkowski background. Although the analytical formulation of Einstein's linear equations has been well developed, numerical studies that integrate local metric perturbations, the curvature structure of space-time through the Ricci tensor, the dynamics of gravitational wave polarization, and reduction to Newton's law of gravity in a two-dimensional domain are still limited. This research aims to numerically analyze the behavior of metric perturbations and space-time curvature in the framework of linear general relativity and verify its consistency with gravitational wave theory and Newtonian gravity at weak field and low velocity limits. The study is limited to a linearized approach, two-dimensional flat spacetime, harmonic and transverse–traceless gauge conditions, and ideal sources in the form of Gaussian perturbations and source-free waves. The methods used include the theoretical formulation of linearized general relativity and the Finite Difference Method (FDM) numerical approach to discretize the Laplace operator and wave equation with the FTCS scheme. The results show that Gaussian perturbations produce highly localized curvature with a global Ricci tensor contribution approaching zero. Gravitational wave simulations show the dominance of energy in polarization (h_+)\ over (h_\times), as well as numerical verification of the relationship (h_{00}=-2\phi), which confirms the reduction of general relativity to Newton's laws. This research fills a research gap by integrating metric analysis, curvature, and gravitational waves into a single consistent numerical framework. The novelty of this research lies in Gaussian modeling and integrated FDM-based numerical analysis as a conceptual bridge between general relativity and classical mechanics.
Co-Authors Adriyanti, Aissyah Lathifah Alatif, Yahya Halim Ariefka, Reza Goldbert Harmuda Duva Sinaga Jaya, Pratama Karim, Mohammad Alfin Kasim, Mohd Shahir Muhlis, Dasep Nirwanty, Vica Putri Noor, RR Afrida Nurahman, Arip Pandara, Dolfie Paulus Purwanto, Romdhon Putri, Phoebe Cathlya Ismanto Siagian, Ruben Cornelius Wardana, Febriansyah Wibowo, Arnowo Hari