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Array Investigative Methods to Study Earth's Outer Core Structures and Heterogeneities and Assessment of Required Geoscience Workforce Skills and Students' Perception of Employability, and University Program Quality in Nigeria
Array Investigative Methods to Study Earth's Outer Core Structures and Heterogeneities and Assessment of Required Geoscience Workforce Skills and Students' Perception of Employability, and University Program Quality in Nigeria
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105310
- ISBN
- 9798265458827
- DDC
- 550
- 저자명
- Aderoju, Adeolu.
- 서명/저자
- Array Investigative Methods to Study Earths Outer Core Structures and Heterogeneities and Assessment of Required Geoscience Workforce Skills and Students Perception of Employability, and University Program Quality in Nigeria
- 발행사항
- [Sl] : Arizona State University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 236 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-06, Section: A.
- 주기사항
- Advisor: Garnero, Edward.
- 학위논문주기
- Thesis (Ph.D.)--Arizona State University, 2025.
- 초록/해제
- 요약This study presents a comprehensive investigation focused on the Earth's uppermost outer core, through the development and application of innovative seismic array processing methodologies. The study is structured in three interconnected parts. First, the fundamental importance of SmKS seismic phases-core-traversing waves that undergo multiple reflections at the underside of the core-mantle boundary-is established as optimal probes of outer core structure due to their uniquely shallow sampling trajectories. Second, ArrpPy is introduced, a novel open-source Python-based software package specifically designed to enhance array processing of SmKS phases. ArrpPy implements advanced computational approaches including iterative beamforming, adaptive trace weighting systems, and cross-correlation alignment algorithms that collectively address the inherent challenges of analyzing low-amplitude, closely spaced multiple core phases. The software's modular architecture incorporates quality control measures and solutions for systematic variability in measurements. Third, the first comprehensive global catalog of SmKS measurements is presented, generated by applying ArrpPy to deep-focus earthquakes (M6.0, depth 100km) recorded between 1990-2024. This catalog encompasses slowness, backazimuth, and differential travel time measurements for multiple SmKS phases across diverse azimuthal and epicentral distance ranges. This research significantly expands observational capabilities for studying Earth's outer core structure while establishing a framework for future investigations. The last study presents a comprehensive assessment of Nigeria's geoscience workforce skills, examining the alignment between industry requirements, student perceptions of employability needs, and university program quality. The research employed a mixed-methods approach, analyzing 58 geoscience job advertisements from 2020-2022 to identify employer skill requirements, and surveying geoscience students across Nigerian universities to evaluate their awareness of workforce needs, perceptions of program quality, and self-assessed proficiency in key competencies. Analysis revealed that while 75.57% of students reported awareness of required workforce skills, significant gaps exist between employer expectations and student preparedness. The findings highlight the need for curriculum reform, enhanced practical training, improved laboratory and field equipment, strengthened industry-academia collaboration, and focused career guidance services.
- 일반주제명
- Geophysics
- 키워드
- Beamforming
- 키워드
- Seismic array
- 키워드
- Workforce skills
- 키워드
- Employer skill
- 기타저자
- Arizona State University Geological Sciences
- 기본자료저록
- Dissertations Abstracts International. 87-06A.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■007cr#unu||||||||
■020 ▼a9798265458827
■035 ▼a(MiAaPQ)AAI32284262
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a550
■1001 ▼aAderoju, Adeolu.
■24510▼aArray Investigative Methods to Study Earth's Outer Core Structures and Heterogeneities and Assessment of Required Geoscience Workforce Skills and Students' Perception of Employability, and University Program Quality in Nigeria
■260 ▼a[Sl]▼bArizona State University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a236 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-06, Section: A.
■500 ▼aAdvisor: Garnero, Edward.
■5021 ▼aThesis (Ph.D.)--Arizona State University, 2025.
■520 ▼aThis study presents a comprehensive investigation focused on the Earth's uppermost outer core, through the development and application of innovative seismic array processing methodologies. The study is structured in three interconnected parts. First, the fundamental importance of SmKS seismic phases-core-traversing waves that undergo multiple reflections at the underside of the core-mantle boundary-is established as optimal probes of outer core structure due to their uniquely shallow sampling trajectories. Second, ArrpPy is introduced, a novel open-source Python-based software package specifically designed to enhance array processing of SmKS phases. ArrpPy implements advanced computational approaches including iterative beamforming, adaptive trace weighting systems, and cross-correlation alignment algorithms that collectively address the inherent challenges of analyzing low-amplitude, closely spaced multiple core phases. The software's modular architecture incorporates quality control measures and solutions for systematic variability in measurements. Third, the first comprehensive global catalog of SmKS measurements is presented, generated by applying ArrpPy to deep-focus earthquakes (M6.0, depth 100km) recorded between 1990-2024. This catalog encompasses slowness, backazimuth, and differential travel time measurements for multiple SmKS phases across diverse azimuthal and epicentral distance ranges. This research significantly expands observational capabilities for studying Earth's outer core structure while establishing a framework for future investigations. The last study presents a comprehensive assessment of Nigeria's geoscience workforce skills, examining the alignment between industry requirements, student perceptions of employability needs, and university program quality. The research employed a mixed-methods approach, analyzing 58 geoscience job advertisements from 2020-2022 to identify employer skill requirements, and surveying geoscience students across Nigerian universities to evaluate their awareness of workforce needs, perceptions of program quality, and self-assessed proficiency in key competencies. Analysis revealed that while 75.57% of students reported awareness of required workforce skills, significant gaps exist between employer expectations and student preparedness. The findings highlight the need for curriculum reform, enhanced practical training, improved laboratory and field equipment, strengthened industry-academia collaboration, and focused career guidance services.
■590 ▼aSchool code: 0010.
■650 4▼aGeophysics
■653 ▼aBeamforming
■653 ▼aSeismic array
■653 ▼aWorkforce skills
■653 ▼aEmployer skill
■653 ▼aCurriculum reform
■690 ▼a0373
■690 ▼a0467
■690 ▼a0635
■71020▼aArizona State University▼bGeological Sciences.
■7730 ▼tDissertations Abstracts International▼g87-06A.
■790 ▼a0010
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360139▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
