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All-Sky Search For Long-Duration Gravitational-Wave Transients In The First Part Of The Fourth Ligo-Virgo-Kagra Observing Run, A. G. Abac, I. Abouelfettouh, F. Acernese, Teviet Creighton, Mario C. Diaz, Raul A. Espinosa, J. Lawrence, Francisco Llamas Villarreal, Soma Mukherjee, Volker Quetschke, Miriam Ramos Arevalo, Wenhui Wang Apr 2026

All-Sky Search For Long-Duration Gravitational-Wave Transients In The First Part Of The Fourth Ligo-Virgo-Kagra Observing Run, A. G. Abac, I. Abouelfettouh, F. Acernese, Teviet Creighton, Mario C. Diaz, Raul A. Espinosa, J. Lawrence, Francisco Llamas Villarreal, Soma Mukherjee, Volker Quetschke, Miriam Ramos Arevalo, Wenhui Wang

Physics & Astronomy Faculty Publications

We present an all-sky search for long-duration gravitational waves (GWs) from the first part of the LIGO-Virgo-KAGRA fourth observing run (O4), called O4a and comprising data taken between May 24, 2023, and January 16, 2024. The GW signals targeted by this search are the so-called “long-duration” ( ≳1  s) transients expected from a variety of astrophysical processes, including nonaxisymmetric deformations in magnetars or eccentric binary coalescences. We make minimal assumptions on the emitted GW waveforms in terms of morphologies and durations. Overall, our search targets signals with durations of ∼1–1000  s and frequency content in the range 16–2048 Hz. In …

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An Infinite Set Of One-Range Addition Theorems Without An Infinite Second Series, For Slater Orbitals And Their Derivatives, Applicable To Multiple Coordinate Systems, Jack C. Straton Apr 2026

An Infinite Set Of One-Range Addition Theorems Without An Infinite Second Series, For Slater Orbitals And Their Derivatives, Applicable To Multiple Coordinate Systems, Jack C. Straton

Physics Faculty Publications and Presentations

Addition theorems have been indispensable tools for the reduction of quantum transition amplitudes. They are normally utilized at the start of the process to move the angular dependence within plane waves, Coulomb potentials, and the like, into a sum over spherical harmonics that allows the angular integration to be carried out. These have historically been “two-range” addition theorems, characterized by the two-fold notation r>=Max[r1,r2] and r< =Min[r1,r2] and comprising a single infinite series. More recently, “one-range” addition theorems have been created that have no such piecewise notation, but at the cost of the introduction of another infinite series. We use a very different approach to derive an infinite set of addition theorems for Slater orbitals, hydrogenic and Hylleraas wave functions, and so on, that retain the one-range variable dependence but have, at worst, a finite second series rather than an infinite one. In addition, unlike previous addition theorems, they are applicable to more than one coordinate system. One of these addition theorems may also be used for Yukawa-like functions that may appear late in the reduction of amplitude integrals, and we show its utility for an integral that has stubbornly defied reduction to analytic form for nearly sixty years. Finally, we craft indefinite integrals of 15 half-integer Macdonald functions multiplied by (inverse) powers and negative exponentials containing squares of the integration variable.

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Initiatives To Grow New Innovative Talent To Enable Fusion Energy, Peng Zhang, Ranganathan Parthasarathy, Yuqiao Fan, Arnold Lumsdaine, Rinkle Juneja, Yuchen Jiang, Monica Gehrig, Louise Ferris, David Donovan, Firas Akasheh, Olakunle Harrison, Joshua Schlegel, Manish Sharma, Mohammad Habibi, Mohan Rao, Rajni Chahal, Sean Walters, Vola Andrianarijaona Apr 2026

Initiatives To Grow New Innovative Talent To Enable Fusion Energy, Peng Zhang, Ranganathan Parthasarathy, Yuqiao Fan, Arnold Lumsdaine, Rinkle Juneja, Yuchen Jiang, Monica Gehrig, Louise Ferris, David Donovan, Firas Akasheh, Olakunle Harrison, Joshua Schlegel, Manish Sharma, Mohammad Habibi, Mohan Rao, Rajni Chahal, Sean Walters, Vola Andrianarijaona

Achieve

The Initiatives to Grow New Innovate Talent to Enable Fusion Energy (IGNITE Fusion Energy) project was launched under the U.S. Department of Energy’s Reaching a New Energy Sciences Workforce (RENEW) program. This DOE RENEW-funded project is a multi‑institutional program that aims to build the future fusion workforce through mentoring, curriculum development, and innovation bootcamps. IGNITE brings together six academic institutions (Tennessee Tech University, Tennessee State University, Tuskegee University, Southern Adventist University, Missouri University of Science Technology, and University of Tennessee–Knoxville), Oak Ridge National Laboratory (ORNL) as a research and partnership hub, and 11+ private fusion companies for industry input and …

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Static And Dynamic Properties Of Dense Matter, Liam Brodie Apr 2026

Static And Dynamic Properties Of Dense Matter, Liam Brodie

Arts & Sciences Graduate Student Theses and Dissertations

Neutron stars and their mergers create environments of ultra-dense matter where the strong interaction governs the behavior, but where quantum chromodynamics, the theory of the strong interaction, cannot be solved exactly or perturbatively using current methods. Neutron stars are objects with more mass than our Sun, but with a diameter of about 25 km. Observations of neutron star macroscopic properties like their masses and radii, their surface temperatures, and the gravitational-wave and electromagnetic signals from their mergers allow us to use theoretical tools to infer the behavior of matter at a microscopic scale. In this thesis, we explore the static …

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Development Of New Technical Approaches To Speed The Search For Axion Dark Matter With Haloscopes, Jonah Harper Hoffman Apr 2026

Development Of New Technical Approaches To Speed The Search For Axion Dark Matter With Haloscopes, Jonah Harper Hoffman

Arts & Sciences Graduate Student Theses and Dissertations

The axion is a hypothetical particle that may solve two major problems in physics: the strong CP problem in quantum chromodynamics (QCD) and the unknown particle nature of the dark matter. Axion haloscopes like the Axion Dark Matter eXperiment (ADMX) are capable of probing the region of parameter space where axions could constitute the dark matter. These experiments use a microwave resonant cavity in a strong magnetic field to convert axions into detectable photons when their Compton wavelength matches the resonant mode of the cavity. By moving a metal rod within the cavity volume, the resonant frequency can be tuned, …

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The Role Of Interactions In Moiré Quantum Materials, Liangtao Peng Apr 2026

The Role Of Interactions In Moiré Quantum Materials, Liangtao Peng

Arts & Sciences Graduate Student Theses and Dissertations

Moiré quantum materials have emerged as a highly tunable platform for studying strongly interacting electrons in low dimensions. By twisting or lattice-mismatching atomically thin crystals, one can generate long-wavelength moiré superlattices that reconstruct the electronic bands, produce narrow bandwidths, and greatly enhance the importance of Coulomb interactions. As a result, these systems host a wide range of correlated phenomena, including symmetry breaking, magnetism, and superconductivity. This dissertation develops and applies Green's-function-based many-body methods to understand the role of interactions in moiré quantum materials. This dissertation consists of four chapters. The first chapter introduces moiré quantum materials and reviews the basic …

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Advancing High-Energy Astrophysics Through X-Ray Spectropolarimetry And Balloon-Borne Instrumentation, Sohee Chun Apr 2026

Advancing High-Energy Astrophysics Through X-Ray Spectropolarimetry And Balloon-Borne Instrumentation, Sohee Chun

Arts & Sciences Graduate Student Theses and Dissertations

The strong gravitational field around black holes provides a unique laboratory for investigating the behavior of matter and radiation under extreme conditions. As matter accretes, the interplay between the accretion disk, hot corona, and surrounding stellar environment produces complex spectral and polarimetric X-ray signatures. Thus, X-ray spectropolarimetry has become a powerful tool for constraining the accretion geometry. Building on these advances, this dissertation integrates theoretical modeling, observational data analysis, and instrumentation development to address open questions in high-energy astrophysics. On the theoretical side, relativistic ray-tracing simulations test the truncated disk-hot inner flow accretion geometry against observations of Cygnus X-1, identifying …

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3Ω Thermal Transport In Atomically Thin Materials, Yiwei Le Apr 2026

3Ω Thermal Transport In Atomically Thin Materials, Yiwei Le

Arts & Sciences Graduate Student Theses and Dissertations

Since the discovery of graphene, research on two-dimensional (2D) materials has become a central focus of condensed matter physics. While an enormous number and variety of investigations of their electrical, optical, and mechanical properties have been undertaken, their thermal properties remain comparatively underexplored, despite the importance for understanding low-energy excitations and phase transitions. Here, we introduce an extension of the 3ω method thermal measurement technique to the 2D limit of materials. We develop analytical models of thermal transport in the 3ω geometry with boundary conditions tailored for suspended 2D flakes. We then experimentally confirm the feasibility of this approach in …

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Observing Jovian Atmospheric Features Using Junocam Projections, Persea Halloran, Athena Klos Apr 2026

Observing Jovian Atmospheric Features Using Junocam Projections, Persea Halloran, Athena Klos

Aerospace, Physics, and Space Science Student Publications

JunoCam is a non-scientific camera attached to the Juno Probe, and takes images approximately every 30 days, at each perijove (PJ). These images can be projected into a 3D array in Python. Sankar’s Citizen Scientist project aimed to make this process accessible to amateur scientists. Using parts of the method Sankar’s team developed, our aim was to investigate the circumpolar regions of Jupiter’s atmosphere. Around five notable features during PJ 53 and 54 were identified. The primary feature noted was looked at using an open-source particle image velocimetry (PIV) software, OpenPIV, during PJ52 - PJ54. It was found that this …

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The Sky Is Not The Limit: Characterizing The Limiting Magnitudes Of The Ortega Observatory Telescopes, Joshua Benveniste Apr 2026

The Sky Is Not The Limit: Characterizing The Limiting Magnitudes Of The Ortega Observatory Telescopes, Joshua Benveniste

Aerospace, Physics, and Space Science Student Publications

Florida Tech’s Ortega Observatory has many high quality telescopes whose limits require empirical characterization. This project aims to do exactly that by calculating the point-source limiting magnitudes for three telescopes, including the Kennedy Space Center Visitor Complex Telescope

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Gamma Ray Burst Afterglow Slopes, Brian Robbins Apr 2026

Gamma Ray Burst Afterglow Slopes, Brian Robbins

Aerospace, Physics, and Space Science Student Publications

The standard models for gamma ray bursts (GRBs) typically assume that shockaccelerated electrons follow a power law distribution of energies. However, this behavior is not what some gamma ray bursts show. In this project, it is suggested that the presence of thermal electrons causes temporal and spectral structure across the afterglow, which is significantly different from models assuming a pure power-law distribution of electrons. To model the afterglows, we decide on a large number of samples of GRBs from the Swift database and obtain the temporal and spectral indices at arbitrary times. By finding the temporal and spectral indices at …

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Dual-Lev: A Dual-Axis Ultrasonic Acoustic Levitator, Trevor Hennington, Alyx Mason Apr 2026

Dual-Lev: A Dual-Axis Ultrasonic Acoustic Levitator, Trevor Hennington, Alyx Mason

Aerospace, Physics, and Space Science Student Publications

sound waves to create a standing wave, where regions of high and low pressure form stable nodes that can trap small objects. The upward acoustic radiation force at these nodes balances gravity, allowing the object to float in midair. This technology is applicable in various fields such as chemistry, biological engineering, and sub-gravity simulation. It can also be used for drop dynamics studies, crystallization, and

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Electron Emission From Unactivated Gaas: Towards The Development Of Novel Sources Of Spin-Polarized Electrons, William Truslow Newman Apr 2026

Electron Emission From Unactivated Gaas: Towards The Development Of Novel Sources Of Spin-Polarized Electrons, William Truslow Newman

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Spin-polarized electrons are commonly emitted from GaAs photocathodes with treated surfaces in a process called negative electron affinity activation. These sources require stringent vacuum conditions that are often hard to achieve and lead to significant downtimes in experiments. In this dissertation, I present new investigations of electron emission from unactivated GaAs towards the development of novel sources of spin-polarized electrons. The work entails two primary directions. The first is the investigation of electron emission using multiphoton ionization processes enhanced by nanoscale surface structures. We explore GaAs electron sources including, shards, nanotip arrays of pyramid structures, wedges, and ion-milled tips. The …

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Exploration Of Thermal Management Using The Random Close Packing Of Binary Hard Spheres, Niru Shakya Apr 2026

Exploration Of Thermal Management Using The Random Close Packing Of Binary Hard Spheres, Niru Shakya

Aerospace, Physics, and Space Science Student Publications

Thermal Interface Materials (TIMs), such as pastes, resins, and glues, are designed to transfer heat away from sensitive electronic components. Current TIMs in the Compact Muon Solenoid (CMS) at the LHC use radiation-hard resins doped with single-diameter (20um) diamond spheres. These spheres act as thermal fillers and conduct heat away through contact. In order to maximize probability of this contact, the occupied volume fraction of these spheres must be maximized. It is theoretically accepted that mixing sphere sizes can increase the volume fraction.

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The Three-Dimensional Spherical Quantum Harmonic Oscillator: A Theoretical Exploration, Aurora M. Bowman Apr 2026

The Three-Dimensional Spherical Quantum Harmonic Oscillator: A Theoretical Exploration, Aurora M. Bowman

Aerospace, Physics, and Space Science Student Publications

The three-dimensional quantum harmonic oscillator is analyzed in spherical coordinates. The Schrödinger equation is solved using separation of variables. The system exhibits a quantized energy spectrum determined by quantum numbers.  Results describe the structure of radial and angular wavefunctions.

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Color-Magnitude Diagrams As A Diagnostic Tool Of Nebular Gas Structure, Cameron Hasara, Koen Schenck Apr 2026

Color-Magnitude Diagrams As A Diagnostic Tool Of Nebular Gas Structure, Cameron Hasara, Koen Schenck

Aerospace, Physics, and Space Science Student Publications

The interaction between young stellar populations and surrounding molecular gas governs the morphology and evolution of star-forming regions. In planetary nebulae, strong radiative feedback, stellar winds, and dynamical motions yield complex structures in nebular gas that are often sought and identified through traditional narrowband imaging and spectroscopy. Here, we repurpose Color–Magnitude Diagrams (CMD’s) as diagnostic tools for nebular structure rather than stellar classification.

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The True Interstellar Anisotropy Of 13 Tev Cosmic Rays, Matthew Conde Apr 2026

The True Interstellar Anisotropy Of 13 Tev Cosmic Rays, Matthew Conde

Aerospace, Physics, and Space Science Student Publications

Cosmic rays (CRs) are high-energy particles; bare atomic nuclei, with varying origins and energy levels. Research in this field is focused on identifying potential origins, understanding transport mechanisms faced on their journey to Earth, and interpreting the angular structure of incident CRs. One obstacle of this research is the trajectory modulation induced by the heliosphere during the CRs’ journey. In this work we employ a method to reconstruct the properties of CRs as they were at the local interstellar medium (LISM) by means of a nonlinear model fit to the map at Earth. Another obstacle is the time-averaging used to …

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Maximum Likelihood Light Curve Prediction Of Qpo In Mrk-421, Vanessa Cusumano Apr 2026

Maximum Likelihood Light Curve Prediction Of Qpo In Mrk-421, Vanessa Cusumano

Aerospace, Physics, and Space Science Student Publications

Using RXTE (Rossi X-ray Timing Explorer) and SwiftBAT (Swift Burst Alert Telescope), I modeled the X-Ray light curve of MRK-421 to investigate the quasi-periodic oscillations (QPOs). A maximum likelihood approach with a damped harmonic oscillator (DHO) model was applied to CARMAprocessed light curves. Both datasets reveal periodic behavior, with SwiftBBAT showing a smooth ~400-day signal, and RXTE producing a staggered ~700-800 day variation. Results support the presence of QPOs while highlighting instrument-dependent variability consistent with differences in sensitivity and energy range.

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Porkchops And Lemmon-Ade: Trajectory And Δv Determination For Small Solar System Bodies, Michael Ferrigno, Elizabeth Hayes, Dominic Heffron Apr 2026

Porkchops And Lemmon-Ade: Trajectory And Δv Determination For Small Solar System Bodies, Michael Ferrigno, Elizabeth Hayes, Dominic Heffron

Aerospace, Physics, and Space Science Student Publications

Comets and asteroids have complex trajectories and are important for planetary defense and potential resources. Our team observed asteroid 6 Hebe (Hebe) with the Skynet Robotic Telescope Network and comets C/2025 A6 (Lemmon) and 3I/ATLAS (ATLAS) with the Ortega Observatory’s telescopes. We used a Markov Chain Monte Carlo (MCMC) simulation to determine their orbital elements, recreated their trajectories with our Orbit Visualizer, and generated porkchop plots to identify energy-efficient transfer windows. Our methods also produced simple, reusable tools that can help study small-body motion.

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That’S No Moon: Understanding Technosignatures Via Simulating The Lightcurves Of Transiting Extraterrestrial Kilostructures, Emilio Lugo, Bridget Mcdermott Apr 2026

That’S No Moon: Understanding Technosignatures Via Simulating The Lightcurves Of Transiting Extraterrestrial Kilostructures, Emilio Lugo, Bridget Mcdermott

Aerospace, Physics, and Space Science Student Publications

Hypothesized extraterrestrial technological intelligences have been theorized to construct large structures orbiting their host star. They can be detected using their transit light curves. We trained a deep neural network on epoch photometries queried from GAIA DR3 and synthetic light curves simulated for these various theorized transiting geometries.

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Modeling Of A Mitigation Strategy For Carrington Class Cmes, Jose Fuentes, Camilla Wright Apr 2026

Modeling Of A Mitigation Strategy For Carrington Class Cmes, Jose Fuentes, Camilla Wright

Aerospace, Physics, and Space Science Student Publications

On September 1, 1859, a powerful solar flare was observed by Richard Carrington [1]. This flare ejected highly energetic plasma, called a coronal mass ejection (CME), towards Earth. This CME impacted Earth, causing magnetic induction which seriously impacted technology. Lingam and Loeb (2017) [2] predicted that if the Carrington CME were to occur today, the economic damages to the US would be on the order of $2 trillion USD. In this work, we present an impact mitigation strategy as a sufficiently strong magnetic dipole field placed at a gravitational equilibrium point (L1) located at 1.5 Gm from Earth in the …

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High Performance Ae-Cnn Model Enhanced Via Gaussian Augmentation For Rssi-Dependent Indoor Positioning In Wireless Sensor Networks, Kahlaa K. Al-Nassrawy, Ghaidaa A Al-Sultany Apr 2026

High Performance Ae-Cnn Model Enhanced Via Gaussian Augmentation For Rssi-Dependent Indoor Positioning In Wireless Sensor Networks, Kahlaa K. Al-Nassrawy, Ghaidaa A Al-Sultany

Karbala International Journal of Modern Science

Precise indoor positioning system remains a significant challenge within Wireless Sensor Networks (WSNs) due to the instability and noise sensitivity of Received Signal Strength Indicator (RSSI) data. This paper proposes an advanced hybrid deep learning framework designed for 2D indoor localization, utilizing RSSI measurements to predict human or object position. Furthermore, to enhance the robustness of the model against signal variance and promote its generalization capability under this uncertainty, a data augmentation strategy is applied using three methods: Gaussian Noise Injection (GNI), Gaussian Mixture Model (GMM), and Bayesian Gaussian Mixture Model (BGMM). The purpose of data augmentation is to simulate …

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Optimization Of Pediatric Multidetector Ct Imaging Parameters Using A Machine Learning–Based Monte Carlo Simulation Model, Ali O. Masoud, Adithya Rajnaryanan, Khamis O. Amour, Ahmed M. Jusabani, Justin E Ngaile, Manoj Kumar, Mwingereza John Kumwenda Dr Apr 2026

Optimization Of Pediatric Multidetector Ct Imaging Parameters Using A Machine Learning–Based Monte Carlo Simulation Model, Ali O. Masoud, Adithya Rajnaryanan, Khamis O. Amour, Ahmed M. Jusabani, Justin E Ngaile, Manoj Kumar, Mwingereza John Kumwenda Dr

Tanzania Journal of Science

This study utilized Monte Carlo (MC) simulations to optimize radiation doses in pediatric multidetector computed tomography (MDCT) head scans by analyzing key parameters like tube current (mA), tube voltage (kV), pitch, and slice thickness. The findings indicate that reducing tube current significantly lowers the Computed Tomography Dose Index (CTDIvol) and Dose Length Product (DLP), effectively minimizing patient radiation exposure. Higher pitch values (0.7–0.9) further reduced radiation by decreasing beam overlap, while using a thinner slice thickness (0.6 mm) improved dose efficiency. A comparison highlighted the effectiveness of optimization: simulated parameters kVp 100, mAs 81, pitch 0.98 yielded a CTDIvol of …

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Developing Physics And Computing Identities In A Computationally Integrated Physics Course, Elizabeth Hallock Apr 2026

Developing Physics And Computing Identities In A Computationally Integrated Physics Course, Elizabeth Hallock

Engineering & Physics Student Scholarship

No abstract provided.

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Patient-Level Breast Cancer Classification From Multi-View Mammography With Side-Specific Evidence For Interpretability, Bushra Intakhab Apr 2026

Patient-Level Breast Cancer Classification From Multi-View Mammography With Side-Specific Evidence For Interpretability, Bushra Intakhab

Electronic Theses and Dissertations 2020 - Present

Breast cancer remains one of the leading causes of cancer-related death among women. Early detection through screening mammography is therefore very important. However, mammogram interpretation can be difficult because abnormalities may be subtle and spread across different views. The increasing workload of radiologists can also affect timely analysis. Artificial intelligence (AI) has been widely explored to support mammography interpretation by improving speed and consistency. However, many existing AI methods focus on patch-level or image-level analysis rather than the full patient exam. This limits their ability to capture the complete clinical picture, since important information is distributed across multiple views. In …

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Spot Scanning Proton Beams Characterization Via Plastic Scintillator Detector, Saad Bin Saeed Ahmed Apr 2026

Spot Scanning Proton Beams Characterization Via Plastic Scintillator Detector, Saad Bin Saeed Ahmed

Electronic Theses and Dissertations 2020 - Present

In spot scanning proton therapy, the machine steers magnetically a narrow pencil beam across the target volume, delivering highly conformal dose distributions layer by layer. As beam size is very small, this introduces a dosimetry problem. The beam is dynamic and the dose gradients are steep — conditions that push conventional ionization chambers beyond their reliable operating range. Plastic scintillation detectors offer a potential solution. Their sub-millimeter active volumes avoid the volume-averaging effects over larger chambers, and their very high temporal resolution making real-time monitoring feasible. This thesis characterizes the Blue Physics plastic scintillation detector in spot scanning proton fields …

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Development And Flight Of Stratospheric Missions For Hard X-Ray Polarimetry And Hard X-Ray Spectroscopy, Ephraim Gau Apr 2026

Development And Flight Of Stratospheric Missions For Hard X-Ray Polarimetry And Hard X-Ray Spectroscopy, Ephraim Gau

Arts & Sciences Graduate Student Theses and Dissertations

The recent launches of the {\it Imaging X-ray Polarimetry Explorer} ({\it IXPE}\,) and {\it XRISM} have provided significant advances to the realms of polarization and high-resolution spectroscopy in X-ray astrophysics. However, both of these satellite missions conduct measurements in the soft X-rays, below 10 keV. To obtain a complete picture of any astrophysical source, we must extend these capabilities to the hard X-rays, above 10 keV, as well. Thus, in my graduate work, I have directed my efforts in these two regimes: measuring the polarization of hard X-rays with {\it XL-Calibur}, and improving the energy resolution of hard X-ray telescopes …

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Techno-Enviro-Economic Analysis Of Precipitated Calcium Carbonate Production From Carbon Dioxide In Cement Industry Flue Gas And Calcium Hydroxide, Natalia Debora Panggabean, Widodo Wahyu Purwanto Apr 2026

Techno-Enviro-Economic Analysis Of Precipitated Calcium Carbonate Production From Carbon Dioxide In Cement Industry Flue Gas And Calcium Hydroxide, Natalia Debora Panggabean, Widodo Wahyu Purwanto

Journal of Materials Exploration and Findings

CCUS is a technological solution to reduce emissions from the cement industry, which is the second largest CO2-intensive industry. This study aims to analyze technical, economic, and environmental performance of Precipitated Calcium Carbonate (PCC) synthesis in cement industry flue gas. The process simulation includes the CO2 capture system from cement plant, CO2 captured used as feedstock for PCC synthesis process through its reaction with calcium hydroxide. The simulation was carried out using ASPEN Plus software. Technical analysis was performed to determine the CO2 capture efficiency and PCC synthesis efficiency. Economic analysis was conducted to calculate CO2 capture cost and production …

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Feasibility Analysis Of Thermal Oxidizer To Determine Remaining Life Using Fitness- For-Service Level 3 Method, Yudhi Yudistirawan, Donanta Dhaneswara, Wahyuaji Narottama Putra, Gama Widyaputra, Dewi Kurnia Suci, Agung Putra Mahardhika Apr 2026

Feasibility Analysis Of Thermal Oxidizer To Determine Remaining Life Using Fitness- For-Service Level 3 Method, Yudhi Yudistirawan, Donanta Dhaneswara, Wahyuaji Narottama Putra, Gama Widyaputra, Dewi Kurnia Suci, Agung Putra Mahardhika

Journal of Materials Exploration and Findings

An aged thermal oxidizer (TOX) in the oil and gas industry necessitates a comprehensive evaluation to ensure its continued safe operation. This study presents a Remaining Life Assessment (RLA) and a Fitness for Service (FFS) evaluation for the four main components of the TOX, in accordance with API 510, API 579/ASME FFS-1, and ASME BPVC Section VIII Div-1 standards. The investigation includes the determination of maximum stress and maximum temperature required to assess the operational viability of the reactor. The four components are radiant, convection, transition, and stack sections—were modeled using the finite element method (FEM). Following the geometric modeling, …

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Assessing Passenger Electric Vehicle Growth Strategies And Their Impacts On Electricity Demand Load And Co2 Emissions In Aceh Province To Achieve Net Zero Emission Target By 2060, Taufik Hidayat, Widodo Wahyu Purwanto Apr 2026

Assessing Passenger Electric Vehicle Growth Strategies And Their Impacts On Electricity Demand Load And Co2 Emissions In Aceh Province To Achieve Net Zero Emission Target By 2060, Taufik Hidayat, Widodo Wahyu Purwanto

Journal of Materials Exploration and Findings

The electrification of the transport sector is a crucial pathway for achieving Indonesia’s Net Zero Emissions (NZE) target by 2060. This study assesses the potential impact of passenger electric vehicle (EV) penetration on electricity demand and CO2 emissions in Aceh Province through a scenario-based modelling approach. Two policy-aligned scenarios are assessed: a low-penetration (LP) scenario and a high-penetration (HP) scenario. Using the Gompertz model and the ASIF framework, total CO2 emissions were projected from 2020 to 2060. Results show that although higher EV penetration reduces direct emissions from internal combustion engine (ICE) vehicles, total CO2 emissions increase more significantly under …

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