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Articles 10771 - 10800 of 302425

Full-Text Articles in Physical Sciences and Mathematics

Prediction Of Factors For Patients With Hypertension And Dyslipidemia Using Multilayer Feedforward Neural Networks And Ordered Logistic Regression Analysis: A Robust Hybrid Methodology, Wan Muhamad Amir W Ahmad, Mohamad Nasarudin Bin Adnan, Norhayati Yusop, Hazik Bin Shahzad, Farah Muna Mohamad Ghazali, Nor Azlida Aleng, Nor Farid Mohd Noor Aug 2023

Prediction Of Factors For Patients With Hypertension And Dyslipidemia Using Multilayer Feedforward Neural Networks And Ordered Logistic Regression Analysis: A Robust Hybrid Methodology, Wan Muhamad Amir W Ahmad, Mohamad Nasarudin Bin Adnan, Norhayati Yusop, Hazik Bin Shahzad, Farah Muna Mohamad Ghazali, Nor Azlida Aleng, Nor Farid Mohd Noor

Makara Journal of Health Research

Background: Hypertension is characterized by abnormally high arterial blood pressure and is a public health problem with a high prevalence of 20%–30% worldwide. This research combined multiple logistic regression (MLR) and multilayer feedforward neural networks to construct and validate a model for evaluating the factors linked with hypertension in patients with dyslipidemia.

Methods: A total of 1000 data entries from Hospital Universiti Sains Malaysia and advanced computational statistical modeling methodologies were used to evaluate seven traits associated with hypertension. R-Studio software was utilized. Each sample's statistics were calculated using a hybrid model that included bootstrapping.

Results: Variable …


Utilizing Low-Cost Sensors To Monitor Indoor Air Quality In Mongolian Gers, Callum Flowerday, Jaron C. Hansen, Phil Lundrigan, Christopher Kitras Aug 2023

Utilizing Low-Cost Sensors To Monitor Indoor Air Quality In Mongolian Gers, Callum Flowerday, Jaron C. Hansen, Phil Lundrigan, Christopher Kitras

Faculty Publications

Air quality has important climate and health effects. There is a need, therefore, to monitor air quality both indoors and outdoors. Methods of measuring air quality should be cost-effective if they are to be used widely, and one such method is low-cost sensors (LCS). This study reports on the use of LCSs in Ulaanbataar, Mongolia to measure PM2.5 concentrations inside yurts or “gers”. Some of these gers were part of a non-government agency (NGO) initiative to improve insulating properties of these housing structures. The goal of the NGO was to decrease particulate emissions inside the gers; a secondary result …


2023 August 31 - Tennessee Weekly Drought Summary, Tennessee Climate Office, East Tennessee State University Aug 2023

2023 August 31 - Tennessee Weekly Drought Summary, Tennessee Climate Office, East Tennessee State University

Tennessee Climate Office Weekly Drought Summaries

No abstract provided.


Comment Letter For Draft Bpsou Uncontrolled Surface Flow Areas Remedial Design (Rd) Work Plan And Draft Bpsou Uncontrolled Surface Flow Areas Pre-Design Investigation (Pdi) Work Plan (Dated August 31, 2023), Atlantic Richfield Company Aug 2023

Comment Letter For Draft Bpsou Uncontrolled Surface Flow Areas Remedial Design (Rd) Work Plan And Draft Bpsou Uncontrolled Surface Flow Areas Pre-Design Investigation (Pdi) Work Plan (Dated August 31, 2023), Atlantic Richfield Company

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Self-Reported Consumption Of Bottled Water V. Tap Water In Appalachian And Non-Appalachian Kentucky, Jason W. Marion Aug 2023

Self-Reported Consumption Of Bottled Water V. Tap Water In Appalachian And Non-Appalachian Kentucky, Jason W. Marion

Journal of Appalachian Health

Introduction: Quantitative studies on drinking water perceptions in Appalachia are limited. High-profile water infrastructure failures in the U.S. and Eastern Kentucky, coupled with human-made and natural disasters in the Appalachian Region, have likely impacted opinions regarding tap water.

Purpose: To use existing unexplored data to describe baseline tap water v. bottled water consumption in Kentucky.

Methods: Telephone-based cross-sectional data were obtained from the 2013 Kentucky Health Issues Poll (KHIP) directed by the Foundation for a Healthy Kentucky. Among many items in KHIP, self-reported consumption of bottled water over tap water, reasons for bottled water use, and demographic data were obtained. …


Μ-1,6-Dioxo-1,6-Diphenylhexane-3,4-Diolato-Bis[(2,2′-Bipyridine)Chloridocopper(Ii)] Dihydrate A; B; A, Luke Nye, Shane G. Tefler, Mark M. Turnbull Aug 2023

Μ-1,6-Dioxo-1,6-Diphenylhexane-3,4-Diolato-Bis[(2,2′-Bipyridine)Chloridocopper(Ii)] Dihydrate A; B; A, Luke Nye, Shane G. Tefler, Mark M. Turnbull

Chemistry

The reaction of CuCl2 with 1,6-diphenyl-1,3,5,6-hexanetetrone and 2,2′-bipyridine (bipy) in ethanol gave crystals of the corresponding bimetallic complex, [Cu2(C18H12O4)Cl2(C10H8N2)2]·2H2O. The molecule is centrosymmetric with each CuII ion coordinated to two oxygen atoms from the tetronediate, two nitrogen atoms from a bipy ligand and one coordinated chloride ion. A water molecule of crystallization forms hydrogen bonds to the chloride ions, linking the molecules into a chain parallel to the bc-face diagonal. © 2023 The Author(s).


Liability For Oil Pollution Damage And Recommendations For Response In The Case Of The Non-Spilling Ship In Marine Collision Incidents, Shiwei Wei Aug 2023

Liability For Oil Pollution Damage And Recommendations For Response In The Case Of The Non-Spilling Ship In Marine Collision Incidents, Shiwei Wei

World Maritime University Dissertations

No abstract provided.


Butte Priority Soils Operable Unit (Bpsou) Unreclaimed And Insufficiently Reclaimed Sites Request For Change 2023-01, Mike Mcanulty Aug 2023

Butte Priority Soils Operable Unit (Bpsou) Unreclaimed And Insufficiently Reclaimed Sites Request For Change 2023-01, Mike Mcanulty

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.


Risk Management During Spring Tide In Yangtze River Shanghai Section, Hongda Xu Aug 2023

Risk Management During Spring Tide In Yangtze River Shanghai Section, Hongda Xu

World Maritime University Dissertations

No abstract provided.


Research On China Ship Co2 Emission Reduction Path:Under Imo Stage Targets, Biao Yi Aug 2023

Research On China Ship Co2 Emission Reduction Path:Under Imo Stage Targets, Biao Yi

World Maritime University Dissertations

No abstract provided.


Synthesis Of 2-Arylpyridines By The Suzuki–Miyaura Cross-Coupling Of Pyfluor With Hetero (Aryl) Boronic Acids And Esters, Juan Rueda-Espinosa, Dewni Ramanayake, Nicholas Ball, Jennifer A. Love Aug 2023

Synthesis Of 2-Arylpyridines By The Suzuki–Miyaura Cross-Coupling Of Pyfluor With Hetero (Aryl) Boronic Acids And Esters, Juan Rueda-Espinosa, Dewni Ramanayake, Nicholas Ball, Jennifer A. Love

Pomona Faculty Publications and Research

The Suzuki–Miyaura cross-coupling of pyridine-2-sulfonyl fluoride (PyFluor) with hetero(aryl) boronic acids and pinacol boronic esters is reported. The reactions can be performed using Pd(dppf)Cl2 as the catalyst, at temperatures between 65 and 100 °C and in the presence of water and oxygen. This transformation generates 2-arylpyridines in modest to good yields (5%–89%).


Understanding The Use Of Artificial Intelligence In Cybercrime, Katalin Parti, Thomas Dearden, Sinyong Choi Aug 2023

Understanding The Use Of Artificial Intelligence In Cybercrime, Katalin Parti, Thomas Dearden, Sinyong Choi

International Journal of Cybersecurity Intelligence & Cybercrime

Artificial intelligence is one of the newest innovations which offenders exploit to satisfy their criminal desires. Although understanding cybercrime that is associated with this relatively new technology is essential in developing proper preventive measures, little has been done to examine this area. Therefore, this paper provides an overview of the two articles featured in the special issue of the International Journal of Cybersecurity Intelligence and Cybercrime, one about deepfakes in the metaverse and the other about social engineering attacks. The articles were written by the winners of the student paper competition at the 2023 International White Hat Conference.


Victimization By Deepfake In The Metaverse: Building A Practical Management Framework, Julia Stavola, Kyung-Shick Choi Aug 2023

Victimization By Deepfake In The Metaverse: Building A Practical Management Framework, Julia Stavola, Kyung-Shick Choi

International Journal of Cybersecurity Intelligence & Cybercrime

Deepfake is digitally altered media aimed to deceive online users for political favor, monetary gain, extortion, and more. Deepfakes are the prevalent issues of impersonation, privacy, and fake news that cause substantial damage to individuals, groups, and organizations. The metaverse is an emerging 3-dimensional virtual platform led by AI and blockchain technology where users freely interact with each other. The purpose of this study is to identify the use of illicit deep fakes which can potentially contribute to cybercrime victimization in the metaverse. The data will be derived from expert interviews (n=8) and online open sources to design a framework …


Harnessing Large Language Models To Simulate Realistic Human Responses To Social Engineering Attacks: A Case Study, Mohammad Asfour, Juan Carlos Murillo Aug 2023

Harnessing Large Language Models To Simulate Realistic Human Responses To Social Engineering Attacks: A Case Study, Mohammad Asfour, Juan Carlos Murillo

International Journal of Cybersecurity Intelligence & Cybercrime

The research publication, “Generative Agents: Interactive Simulacra of Human Behavior,” by Stanford and Google in 2023 established that large language models (LLMs) such as GPT-4 can generate interactive agents with credible and emergent human-like behaviors. However, their application in simulating human responses in cybersecurity scenarios, particularly in social engineering attacks, remains unexplored. In addressing that gap, this study explores the potential of LLMs, specifically the Open AI GPT-4 model, to simulate a broad spectrum of human responses to social engineering attacks that exploit human social behaviors, framing our primary research question: How does the simulated behavior of human targets, based …


Reconstructing 42 Years (1979–2020) Of Great Lakes Surface Temperature Through A Deep Learning Approach, Miraj Kayastha, Tao Liu, Daniel Titze, Timothy C. Havens, Chenfu Huang, Pengfei Xue Aug 2023

Reconstructing 42 Years (1979–2020) Of Great Lakes Surface Temperature Through A Deep Learning Approach, Miraj Kayastha, Tao Liu, Daniel Titze, Timothy C. Havens, Chenfu Huang, Pengfei Xue

Michigan Tech Publications, Part 2

Accurate estimates for the lake surface temperature (LST) of the Great Lakes are critical to understanding the regional climate. Dedicated lake models of various complexity have been used to simulate LST but they suffer from noticeable biases and can be computationally expensive. Additionally, the available historical LST datasets are limited by either short temporal coverage (<30 >years) or lower spatial resolution (0.25° × 0.25°). Therefore, in this study, we employed a deep learning model based on Long Short-Term Memory (LSTM) neural networks to produce a daily LST dataset for the Great Lakes that spans an unparalleled 42 years (1979–2020) at …


Countnet3d: A 3d Computer Vision Approach To Infer Counts Of Occluded Objects With Quantified Uncertainty, Stephen W. Nelson Aug 2023

Countnet3d: A 3d Computer Vision Approach To Infer Counts Of Occluded Objects With Quantified Uncertainty, Stephen W. Nelson

Theses and Dissertations

3D scene understanding is an important problem that has experienced great progress in recent years, in large part due to the development of state-of-the-art methods for 3D object detection. However, the performance of 3D object detectors can suffer in scenarios where extreme occlusion of objects is present, or the number of object classes is large. In this paper, we study the problem of inferring 3D counts from densely packed scenes with heterogeneous objects. This problem has applications to important tasks such as inventory management or automatic crop yield estimation. We propose a novel regression-based method, CountNet3D, that uses mature 2D …


Feasibility Of Functional Mri On Point-Of-Care Mr Platforms, Arjama Halder Aug 2023

Feasibility Of Functional Mri On Point-Of-Care Mr Platforms, Arjama Halder

Electronic Thesis and Dissertation Repository

Magnetic resonance imaging (MRI) has proven to be a clinically valuable tool that can produce anatomical and functional images with improved soft tissue contrast compared to other imaging modalities. There has recently been a surge in low- and mid-field scanners due to hardware developments and innovative acquisition techniques. These compact scanners are accessible, offer reduced siting requirements and can be made operational at a reduced cost.

This thesis aims to implement blood-oxygen-level-dependent (BOLD) resting-state functional MRI (fMRI) at such a mid-field point-of-care scanner. The availability of this technique can be beneficial to get neurological information in cases of traumatic brain …


Freshwater And Saline Flood Plain Wetlands Of The North Platte River - Sources And Seasonal Dynamics: Kiowa Wildlife Management Area, Morrill, Ne, Anne M. Matherne Aug 2023

Freshwater And Saline Flood Plain Wetlands Of The North Platte River - Sources And Seasonal Dynamics: Kiowa Wildlife Management Area, Morrill, Ne, Anne M. Matherne

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

The Kiowa Wildlife Management Area (WMA), a 1 mi² wetland and upland on the North Platte River, was acquired by the Nebraska Game and Parks Commission (NGPC) in 1993. The WMA comprises two distinct wetland types, alkaline and freshwater, both of which provide important wildlife habitat. It was the goal of this project to understand the hydrology controlling the development and maintenance of these wetlands in order to anticipate the affect of management strategies on the wetland complex. The study was designed to develop a comprehensive picture of the hydrogeology of both the fresh and alkaline portions of the WMA, …


Willa Cather Ecological Prairie: An Ecological Overview, Harold G. Nagel Aug 2023

Willa Cather Ecological Prairie: An Ecological Overview, Harold G. Nagel

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

This report includes data gathered on the ecology of a 610 acre mixed grass prairie in south-central Nebraska over a two year period.

An attempt was made to identify as many of the plant and animal species present and to determine density and standing crop biomass wherever possible, under the time and financial constraints present. Few attempts have been made to develop complete species checklists for both animals and plants in prairies. The data collected are considered baseline conditions against which comparisons can be made after a management plan is carried out.

This study of Cather Prairie had several objectives. …


The Flora Of The Oak-Wooded Drainages At The Timber Point Area, Southeastern Butler County, Nebraska, Steven B. Rolfsmeier Aug 2023

The Flora Of The Oak-Wooded Drainages At The Timber Point Area, Southeastern Butler County, Nebraska, Steven B. Rolfsmeier

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

The Timber Point Area is a 160-acre recreational/wildlife area occupying to S½ of the SW¼ sec. 22 and the adjacent N½ of the NW¼ sec. 27, T14N R4E. The area is located in the loess-mantled glacial-till hills of southeast Nebraska not far from the terminal moraine of the Pre-Illinoian glacial sheet, one mile south and two miles east of the present town of Brainard. The uplands at Timber Point were apparently in pasture prior to purchase by the NRD, with some cultivated fields occupying the lower ground along a stream valley which southwest to northeast through the property. This small …


The Flora Of Two Oak Drainages At The Red Cedar Area, Southwestern Saunders County, Nebraska, Steven B. Rolfsmeier Aug 2023

The Flora Of Two Oak Drainages At The Red Cedar Area, Southwestern Saunders County, Nebraska, Steven B. Rolfsmeier

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

The Red Cedar Area is a 175 acre recreational/wildlife area occupying the SE¼ sec. 20, T14N R5E and a small portion of sec. 29 directly to the south. The area is located in the glacial-till hills of southeast Nebraska ca 5 mi. north and 2 mi. west of Valpraiso. The bulk of the area was cultivated farmland prior to purchase by the NRD, and nearly all upland areas here were cultivated cropland, save for some steep oak-wooded drainages on the east side of Hunter’s Slough, which ran northwest to southeast through the property. The creek was dammed after NRD purchase …


The Vascular Plants Of The Woodlands Of South Table Creek In The Vicinity Of The National Arbor Day Center, Nebraska City, Nebraska, Steven B. Rolfsmeier Aug 2023

The Vascular Plants Of The Woodlands Of South Table Creek In The Vicinity Of The National Arbor Day Center, Nebraska City, Nebraska, Steven B. Rolfsmeier

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

The objective of this study is to describe the composition of the vascular plant flora of a three-quarter mile stretch of woodland along South Table Creek managed by the National Arbor Day Foundation in Nebraska City. This 50-60 acre woodland is representative of the many small tributaries of the Missouri River in southeastern Nebraska, and may represent the only natural “preserve” of native forest on the west side of the Missouri River between Fontenelle Forest and Indian Cave State Park. All naturally-occurring species encountered in this study are listed alphabetically by family at the end of this paper, and a …


The Flora Of Meadowlark Prairie, Northeastern Seward County, Nebraska, Steven B. Rolfsmeier Aug 2023

The Flora Of Meadowlark Prairie, Northeastern Seward County, Nebraska, Steven B. Rolfsmeier

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

This report is on the flora of the Meadowlark Prairie. The prairie is an approximately 7 acre remnant of virgin tall-grass prairie in extreme northeastern Seward County, Nebraska. The remnant is triangular in shape and lies on a gentle southeast-facing slope with a total relief of 50 ft., along the east boundary of the Meadowlark Recreation Area. The prairie is surrounded on the east side by a small brome-infested prairie remnant and cultivated field off the NRD property, and on the remaining sides by formerly cultivated fields now seeded to native warm-season grasses. Soils in the area are primarily derived …


The Flora And Plant Communities Of The Ceresco Saline Basins, Southern Saunders County, Nebraska, Steven B. Rolfsmeier Aug 2023

The Flora And Plant Communities Of The Ceresco Saline Basins, Southern Saunders County, Nebraska, Steven B. Rolfsmeier

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

This report is on the flora and plant communities of the Ceresco Saline Basins. The basins are along Rock Creek east of Ceresco and represent the northernmost representatives of the “eastern saline marsh” community in Nebraska. Eastern saline marshland is mostly restricted to the Salt Creek drainage in northern and central Lancaster County, though the Ceresco basins extend a mile or more north into Saunders County in the floodplain of Rock Creek. Some of the wetland in this area is currently under management of the Nebraska Game and Parks Commission, while some of the northernmost portions of the basins are …


Geometry Through Architectural Design, Maureen T. Carroll, Elyn Rykken Aug 2023

Geometry Through Architectural Design, Maureen T. Carroll, Elyn Rykken

LASER Journal

In her 1912 geometry book, Mabel Sykes surveys complex and beautiful architectural designs from around the world to inspire exercises on geometric proof, construction and computation. In over 1800 exercises, Sykes analyzes geometric patterns from ornamental and structural features found in tile mosaics, parquet floors, Gothic windows, trusses and arches. As Sykes' writes, ``Geometry gives, as no other subject can give, an appreciation of form as it exists in the material world" . We have chosen four examples to illustrate how her appealing designs and the accompanying exercises of this hidden gem can be incorporated into any geometry course.


Public Biological Databases And The Sui Generis Database Right, Alexander Bernier, Christian Busse, Tania M. Bubela Aug 2023

Public Biological Databases And The Sui Generis Database Right, Alexander Bernier, Christian Busse, Tania M. Bubela

Office of the Provost

The sui generis database right is an intellectual property right created in the European Union to stimulate investment in the curation of databases. Since its inception, communities engaged in research and development efforts have questioned its potential to incentivise database production, and posit that it stifles productive downstream uses of existing datasets. European courts have restricted the right’s ambit through a restrictive interpretation of the circumstances in which it applies, which we argue, enables downstream use of biological databases. Nonetheless, residual ambiguities about potential infringement of the right exist. The prospect of unintentional infringement can frustrate downstream innovation. These ambiguities …


Usa: Wolf Connection And Inclusive, Safe Spaces For All, Patrick Fuery, Kelli Fuery Aug 2023

Usa: Wolf Connection And Inclusive, Safe Spaces For All, Patrick Fuery, Kelli Fuery

CCI Books and Book Chapters

"Wolf Connection is a wolf sanctuary located on the outskirts of a rural town, Acton, California, nestled in the Angeles National Forest. The sanctuary consists of 165 acres of stunning woodland and high desert mountains, including a year-round stream. It is located within a one-hour drive from Los Angeles. Wolf Connection runs a series of programmes based around issues of mental health, addressing social and economic inequality, and providing strategies for resilience and well-being. Wolf Connection identifies the following as its core business activities: Providing Animal Rescue and Wildlife Preservation; At-Risk Youth Education and Empowerment; Community Empowerment; and Environmental Awareness …


Saturating Growth Rate Against Phosphorus Concentration Explained By Macromolecular Allocation, Gabrielle Armin, Jongsun Kim, Keisuke Inomura Aug 2023

Saturating Growth Rate Against Phosphorus Concentration Explained By Macromolecular Allocation, Gabrielle Armin, Jongsun Kim, Keisuke Inomura

School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

The saturating relationship between phytoplankton growth rate and environmental nutrient concentration has been widely observed, yet the mechanisms behind the relationship remain elusive. Here, we use a mechanistic model of phytoplankton and show that the saturating relationship between growth rate and phosphorous concentration can be interpreted by intracellular macromolecular allocation. At low nutrient levels, the diffusive nutrient transport linearly increases with the phosphorous concentration, while the internal phosphorous requirement increases with the growth rate, leading to a non-linear increase in the growth rate with phosphorous. This increased phosphorous requirement is due to the increased allocation to biosynthetic and photosynthetic molecules. …


Reply To: Contribution Of Carbon Inputs To Soil Carbon Accumulation Cannot Be Neglected, Feng Tao, Benjamin Z. Houlton, Serita D. Frey, Johannes Lehmann, Stefano Manzoni, Yuanyuan Huang, Lifen Jiang, Umakant Mishra, Bruce A. Hungate, Michael W. I. Schmidt, Markus Reichstein, Nuno Carvalhais, Philippe Ciais, Ying-Ping Wang, Bernhard Ahrens, Gustaf Hugelius, Toby D. Hocking, Xingjie Lu, Zheng Shi, Kostiantyn Viatkin, Ronald Vargas, Yusuf Yigini, Christian Omuto, Ashish A. Malik, Guillermo Peralta, Rosa Cuevas-Corona, Luciano E. Di Paolo, Isabel Luotto, Cuijuan Liao, Yi-Shuang Liang, Vinisa S. Saynes, Xiaomeng Huang, Yiqi Luo Aug 2023

Reply To: Contribution Of Carbon Inputs To Soil Carbon Accumulation Cannot Be Neglected, Feng Tao, Benjamin Z. Houlton, Serita D. Frey, Johannes Lehmann, Stefano Manzoni, Yuanyuan Huang, Lifen Jiang, Umakant Mishra, Bruce A. Hungate, Michael W. I. Schmidt, Markus Reichstein, Nuno Carvalhais, Philippe Ciais, Ying-Ping Wang, Bernhard Ahrens, Gustaf Hugelius, Toby D. Hocking, Xingjie Lu, Zheng Shi, Kostiantyn Viatkin, Ronald Vargas, Yusuf Yigini, Christian Omuto, Ashish A. Malik, Guillermo Peralta, Rosa Cuevas-Corona, Luciano E. Di Paolo, Isabel Luotto, Cuijuan Liao, Yi-Shuang Liang, Vinisa S. Saynes, Xiaomeng Huang, Yiqi Luo

Faculty Publications

In the accompanying Comment1, He et al. argue that the determinant role of microbial carbon use efficiency in global soil organic carbon (SOC) storage shown in Tao et al. (2023)2 was overestimated because carbon inputs were neglected in our data analysis while they suggest that our model-based analysis could be biased and model-dependent. Their argument is based on a different choice of independent variables in the data analysis and a sensitivity analysis of two process-based models other than that used in our study. We agree that both carbon inputs and outputs (as mediated by microbial processes) matter when predicting SOC …


Synchrotron Study Of Phase Transition And Heterostructures In Metal Oxide Semiconductors, Bingyu Dong Aug 2023

Synchrotron Study Of Phase Transition And Heterostructures In Metal Oxide Semiconductors, Bingyu Dong

Electronic Thesis and Dissertation Repository

Transition metal oxides, including titanium dioxide (TiO2), zinc oxide (ZnO) and Tin dioxide (SnO2) are widely recognized semiconducting photocatalysts. This project engages in a detailed examination of the phase transition of TiO2 and the synthesis of heterostructured metal oxides using an eco-friendly method of ball-milling. A variety of spectroscopy and microscopy techniques have been used to analyze the products. Synchrotron-based techniques: X-ray Absorption near-edge spectroscopy (XANES), X-ray Emission Spectroscopy and X-ray excited optical luminescence (XEOL) can demonstrate the local structure and bonding. The finding highlights a phase transition in TiO2 and the formation of …