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Integrating Machine Learning Techniques for Streamlined Predictive Modeling in Cosmological Applications
Integrating Machine Learning Techniques for Streamlined Predictive Modeling in Cosmological Applications
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105534
- ISBN
- 9798263348496
- DDC
- 523
- 서명/저자
- Integrating Machine Learning Techniques for Streamlined Predictive Modeling in Cosmological Applications
- 발행사항
- [Sl] : Georgia Institute of Technology, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 142 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Advisor: Wise, John H.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2025.
- 초록/해제
- 요약The field of astrophysics has developed alongside humanity for many centuries, and is unique in our inability to directly conduct "experiments" on astrophysical objects. Historically, astrophysics has largely been observational and theoretical in nature, but with the advent of computers and their increasing capabilities, the field of computational astrophysics has accelerated our understanding of the universe profoundly. Simulations provide a type of sandbox in which we can better understand the objects we observe and explore our universe in greater detail.As Moore's Law has played out in the development of computer architectures, computational astrophysics has, in parallel, evolved from simplistic analytical models to highly sophisticated simulations capturing a wide dynamic range of physical processes. The rapid development of deep learning models in recent years has the potential to transform this landscape, making simulations significantly more efficient and accessible. Traditional high-fidelity simulations are extremely useful and essential for capturing complex cosmic phenomena, but are often prohibitively expensive in terms of time and resources. By integrating deep learning techniques, we can now emulate intricate physical processes with remarkable speed and accuracy, exploring broader parameter spaces and delving into more detailed astrophysical models. This breakthrough not only enhances our ability to study the universe at unprecedented scales but also opens new avenues for investigating complex physics that were previously out of reach.In this dissertation, I leverage machine learning (ML) and data analysis techniques to optimize simulation runtimes and processing, with an emphasis on the early universe. The projects presented herein demonstrate how targeted computational strategies can streamline astrophysical simulations and provide valuable insights to inform observational efforts.1.1 Background and Motivation1.1.1 The Early Universe and the Epoch of ReionizationThe formation of the first stars and galaxies represents a crucial turning point in the evolution of cosmic structure, signaling the end of the cosmic "Dark Ages." Prior to this, around 400,000 years after the Big Bang, the universe had expanded and cooled sufficiently for its temperature to drop below 3,000 K. This cooling allowed free electrons and protons to combine into neutral hydrogen and helium, a process known as recombination. As a consequence, photons, no longer scattered by free electrons, began to travel freely through space, leading to the decoupling of radiation from matter. This moment left behind a relic imprint known as the Cosmic Microwave Background (CMB) and marked the onset of the Dark Ages, which lasted approximately 200 million years before the first luminous sources emerged. A general schematic of the evolution of the universe is shown in Figure 1.1.These primordial galaxies hosted a diverse population of astrophysical sources that played a transformative role in reshaping the early Universe. At their core were the first generations of stars: the metal-free massive, short-lived Population III (Pop III) stars, which were composed almost entirely of hydrogen and helium, as they formed before any significant metal enrichment had occurred. Their violent deaths - through supernovae and direct-collapse mechanisms - seeded the cosmos with the first heavy elements, paving the way for the emergence of second-generation metal-poor Population II (Pop II) stars, which contained trace amounts of metals and continued to shape early galactic evolution.
- 일반주제명
- Astrophysics
- 일반주제명
- Star & galaxy formation
- 일반주제명
- Deep learning
- 일반주제명
- Gravity
- 일반주제명
- Hydrogen
- 일반주제명
- Radiation
- 일반주제명
- Cosmology
- 일반주제명
- Middle Ages
- 일반주제명
- Cooling
- 일반주제명
- Space telescopes
- 일반주제명
- Black holes
- 일반주제명
- Dark matter
- 일반주제명
- Neural networks
- 일반주제명
- Stars & galaxies
- 일반주제명
- Supernovae
- 일반주제명
- Fluid mechanics
- 일반주제명
- Universe
- 일반주제명
- Astronomy
- 일반주제명
- Optics
- 일반주제명
- Theoretical physics
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■006m o d
■007cr#unu||||||||
■020 ▼a9798263348496
■035 ▼a(MiAaPQ)AAI32310079
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■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a523
■1001 ▼aSethuram, Snigdaa S.
■24510▼aIntegrating Machine Learning Techniques for Streamlined Predictive Modeling in Cosmological Applications
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a142 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Wise, John H.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2025.
■520 ▼aThe field of astrophysics has developed alongside humanity for many centuries, and is unique in our inability to directly conduct "experiments" on astrophysical objects. Historically, astrophysics has largely been observational and theoretical in nature, but with the advent of computers and their increasing capabilities, the field of computational astrophysics has accelerated our understanding of the universe profoundly. Simulations provide a type of sandbox in which we can better understand the objects we observe and explore our universe in greater detail.As Moore's Law has played out in the development of computer architectures, computational astrophysics has, in parallel, evolved from simplistic analytical models to highly sophisticated simulations capturing a wide dynamic range of physical processes. The rapid development of deep learning models in recent years has the potential to transform this landscape, making simulations significantly more efficient and accessible. Traditional high-fidelity simulations are extremely useful and essential for capturing complex cosmic phenomena, but are often prohibitively expensive in terms of time and resources. By integrating deep learning techniques, we can now emulate intricate physical processes with remarkable speed and accuracy, exploring broader parameter spaces and delving into more detailed astrophysical models. This breakthrough not only enhances our ability to study the universe at unprecedented scales but also opens new avenues for investigating complex physics that were previously out of reach.In this dissertation, I leverage machine learning (ML) and data analysis techniques to optimize simulation runtimes and processing, with an emphasis on the early universe. The projects presented herein demonstrate how targeted computational strategies can streamline astrophysical simulations and provide valuable insights to inform observational efforts.1.1 Background and Motivation1.1.1 The Early Universe and the Epoch of ReionizationThe formation of the first stars and galaxies represents a crucial turning point in the evolution of cosmic structure, signaling the end of the cosmic "Dark Ages." Prior to this, around 400,000 years after the Big Bang, the universe had expanded and cooled sufficiently for its temperature to drop below 3,000 K. This cooling allowed free electrons and protons to combine into neutral hydrogen and helium, a process known as recombination. As a consequence, photons, no longer scattered by free electrons, began to travel freely through space, leading to the decoupling of radiation from matter. This moment left behind a relic imprint known as the Cosmic Microwave Background (CMB) and marked the onset of the Dark Ages, which lasted approximately 200 million years before the first luminous sources emerged. A general schematic of the evolution of the universe is shown in Figure 1.1.These primordial galaxies hosted a diverse population of astrophysical sources that played a transformative role in reshaping the early Universe. At their core were the first generations of stars: the metal-free massive, short-lived Population III (Pop III) stars, which were composed almost entirely of hydrogen and helium, as they formed before any significant metal enrichment had occurred. Their violent deaths - through supernovae and direct-collapse mechanisms - seeded the cosmos with the first heavy elements, paving the way for the emergence of second-generation metal-poor Population II (Pop II) stars, which contained trace amounts of metals and continued to shape early galactic evolution.
■590 ▼aSchool code: 0078.
■650 4▼aAstrophysics
■650 4▼aStar & galaxy formation
■650 4▼aDeep learning
■650 4▼aGravity
■650 4▼aHydrogen
■650 4▼aRadiation
■650 4▼aCosmology
■650 4▼aMiddle Ages
■650 4▼aCooling
■650 4▼aSpace telescopes
■650 4▼aBlack holes
■650 4▼aDark matter
■650 4▼aNeural networks
■650 4▼aStars & galaxies
■650 4▼aSupernovae
■650 4▼aFluid mechanics
■650 4▼aUniverse
■650 4▼aAstronomy
■650 4▼aOptics
■650 4▼aTheoretical physics
■690 ▼a0800
■690 ▼a0204
■690 ▼a0596
■690 ▼a0606
■690 ▼a0752
■690 ▼a0753
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360484▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


