Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 66061 - 66090 of 294560

Full-Text Articles in Physical Sciences and Mathematics

U-Pb Apatite Chronometry Of Intrusions In An Accretionary Metamorphic Belt In Western Idaho, Usa, Colleen Grace Rankin Jan 2022

U-Pb Apatite Chronometry Of Intrusions In An Accretionary Metamorphic Belt In Western Idaho, Usa, Colleen Grace Rankin

Graduate Theses/Dissertations

The Salmon River suture zone in west-central Idaho, USA records the tectonic processes where island arcs, similar to modern-day Japan, were accreted to the North American continent in the Jurassic and Cretaceous periods (160-90 million years ago). This suture zone contains metamorphic rocks that were buried deep within the crust at depths of 20 kilometers or more and have subsequently been brought to the surface. The exhuming processes responsible for the metamorphic rocks in the Salmon River suture zone remains unclear. Two competing hypotheses have been proposed to explain the transport of the rocks from the Salmon River suture zone …


Study Of Electrical And Magnetic Properties Of Ni/Nio Nanocomposite Thin Film, Bishwajite Karmakar Jan 2022

Study Of Electrical And Magnetic Properties Of Ni/Nio Nanocomposite Thin Film, Bishwajite Karmakar

Graduate Theses/Dissertations

In this thesis, detailed magnetic and electrical transport properties of composite thin films consisting of antiferromagnetic NiO, and ferromagnetic Ni have been studied. Highly oriented NiO thin films were grown on sapphire (0001) substrate using pulsed laser deposition with varying growth parameters such as oxygen pressure of the chamber and the substrate temperature. To obtain various percentage mixtures of Ni and NiO by means of introducing point defects (oxygen vacancies) into the NiO crystal structure, the as-grown films were annealed in forming gas (Ar:96% and H2:4%) at a fixed temperature of 600C and varying annealing time (0.5h to 6h). X-ray …


Planning And Effects Of Equitable Teaching Practices In Emu Math 120 Class, Kyle Yapp Jan 2022

Planning And Effects Of Equitable Teaching Practices In Emu Math 120 Class, Kyle Yapp

Senior Honors Theses and Projects

The purpose of this project is to evaluate the effects of implementing Equitable Teaching practices in Math 120 Calculus 1. We used the EQUIP instrument in order to measure the amount of participation from each student. We used the X-PIPS-M instrument in order to get the students' responses to the class as well as have Dr. Ross reflect as a teacher. We used the MCOPP+ in order for Dr. Ross to reflect as a teacher. We also used the Calculus 1 Concept Inventory assessment in order to evaluate students' content knowledge growth during the course. We found that students responded …


The Effect Of Autophagy Related Protein 10 And Its Mutants On Autophagic Activity, Sk Nadia Rahman Silvia Jan 2022

The Effect Of Autophagy Related Protein 10 And Its Mutants On Autophagic Activity, Sk Nadia Rahman Silvia

Senior Honors Theses and Projects

Autophagy is the cellular degradation process in which cellular contents are encapsulated by double-membrane vesicles, autophagosomes, and delivered to the vacuole to be degraded and recycled. This process is important for cell health and homeostasis. There are approximately 32 different autophagy-related proteins involved. Atg10 is an enzyme that may affect overall autophagic activity by changing autophagosome size and/or number. Our goal is to find mutants that cause a significant, partial loss in Atg10’s activity by mutating some residues near the active site and testing the functionality of these mutants by performing western blots and enzymatic assays. Here we show that …


A Historical And Practical Survey Of Quantum Computing Using Qiskit, Kenneth Paul Cook Jan 2022

A Historical And Practical Survey Of Quantum Computing Using Qiskit, Kenneth Paul Cook

Senior Honors Theses and Projects

Quantum Computing has been a part of computer science literature since the 1960s, but the call for quantum mechanical-based computation came when renowned theoretical physicist Richard Feynman said, “… nature isn't classical, dammit, and if you want to make a simulation of nature, you'd better make it quantum mechanical, and by golly it's a wonderful problem, because it doesn't look so easy.” (Feynman, 486) His words inspired people to begin work on the project immediately. Although the best ideas have not yet been found, there is much active research and experimentation going on to learn how best to use these …


Introducing An H113a Mutation Into Atg10 Y73q To Reduce Autophagic Activity And Understand The Effect Of Atg On Autophagosome Size And Number, Konrad L. Lautenschlager Jan 2022

Introducing An H113a Mutation Into Atg10 Y73q To Reduce Autophagic Activity And Understand The Effect Of Atg On Autophagosome Size And Number, Konrad L. Lautenschlager

Senior Honors Theses and Projects

Autophagy is an essential recycling process that occurs within eukaryotic cells, however, the individual functions of the current thirty-two known autophagic proteins are not yet entirely understood. At this time, it is known that the autophagic protein Atg7 works upstream of both Atg3 and Atg10. Atg3 is affected by Atg7 and allows for the attachment of Atg8 and the lipid PE which is part of the autophagosome membrane. The Atg10 pathway is also affected by Atg7 but attaches Atg12 to Atg5 which upregulates the function of Atg3 and ultimately Atg8 lipidation. These protein interactions are necessary for forming autophagosomes, large …


Lithofacies Characterization Of Marine Shelf Shale And Implicaitons On Depositional Conditions And Processes On The Continental Shelf — A Case Study Of The Upper-Cretaceous Tuscaloosa Marine Shale In Louisiana And Mississippi, U.S.A., Efren Mendez Jr Jan 2022

Lithofacies Characterization Of Marine Shelf Shale And Implicaitons On Depositional Conditions And Processes On The Continental Shelf — A Case Study Of The Upper-Cretaceous Tuscaloosa Marine Shale In Louisiana And Mississippi, U.S.A., Efren Mendez Jr

Masters Theses

"The Upper Cretaceous Tuscaloosa Marine Shale (TMS) is an unconventional shale reservoir deposited on the continental shelf of the northern Gulf of Mexico Basin. Previous studies have focused on sequence stratigraphy, thermal modeling, and well-log correlations. However, a limited understanding of the stratigraphic heterogeneity of the TMS is yet to be studied. This study aims to characterize the stratigraphic heterogeneity of the TMS using core, petrographic, and well-log analyses to better understand the depositional conditions and processes that occur on the continental shelf. The TMS has been classified into four lithofacies of very fine sands – coarse silts (LF1), medium-fine …


Characterization Of Nanoparticles Using Inductively-Coupled Plasma Mass Spectrometry, Jabez D. Campbell Jan 2022

Characterization Of Nanoparticles Using Inductively-Coupled Plasma Mass Spectrometry, Jabez D. Campbell

Graduate Theses/Dissertations

Nanomaterials are a relatively new class of materials that have many applications which span a wide host of fields from medical products to consumer products. The possible compositions and forms of nanomaterials are just as varied as the applications. Therefore, a versatile characterization method is needed for researchers and regulators alike to ensure nanomaterials are properly used. Single Particle Inductively Coupled Plasma Mass Spectrometry (SP-ICP-MS) is a functional method that could fill the characterization need in the nanomaterial research field. Using data from both SP-ICP-MS tests and data from literature established characterization methods, the viability of making SP-ICP-MS the standard …


Applications Of A Combined Approach Of Kinetic Monte Carlo Simulations And Machine Learning To Model Atomic Layer Deposition (Ald) Of Metal Oxides, Emily Justus Jan 2022

Applications Of A Combined Approach Of Kinetic Monte Carlo Simulations And Machine Learning To Model Atomic Layer Deposition (Ald) Of Metal Oxides, Emily Justus

Graduate Theses/Dissertations

Metal-oxides such as ZnO or Al2O3 synthesized through Atomic Layer Deposition (ALD) have been of great research interest as the candidate materials for ultra-thin tunnel barriers. In this study, I have applied a 3D on-lattice Kinetic Monte Carlo (kMC) code developed by Timo Weckman’s group to simulate the growth mechanisms of the tunnel barrier layer and to evaluate the role of various experimentally relevant factors in the ALD processes. I have systematically studied the effect of parameters such as the chamber pressure temperature, pulse, and purge times. The database generated from the kMC simulations was subsequently used …


On The Chromatic Numbers Of Subgroup Lattices, Jacob C. Miles Jan 2022

On The Chromatic Numbers Of Subgroup Lattices, Jacob C. Miles

Graduate Theses/Dissertations

In this thesis we investigate the chromatic number of the Hasse diagram of a subgroup lattice. We combine results of Bollobás and Tůma to show that there exist infnite groups whose subgroup lattices have arbitarily high chromatic numbers. We show that fnite supersolvable groups have bipartite subgroup lattices but that CLT and non-solvable groups may not have bipartite subgroup lattices. Lastly, we give a preliminary argument suggesting that there are an infnite number of non-solvable groups whose subgroup lattices are bipartite.


Particle Swarm Optimization For Critical Experiment Design, Cole Michael Kostelac Jan 2022

Particle Swarm Optimization For Critical Experiment Design, Cole Michael Kostelac

Masters Theses

“Critical experiments are used by nuclear data evaluators and criticality safety engineers to validate nuclear data and computational methods. Many of these experiments are designed to maximize the sensitivity to a certain nuclide-reaction pair in an energy range of interest. Traditionally, a parameter sweep is conducted over a set of experimental variables to find a configuration that is critical and maximally sensitive. As additional variables are added, the total number of configurations increases exponentially and quickly becomes prohibitively computationally expensive to calculate, especially using Monte Carlo methods.

This work presents the development of a particle swarm optimization algorithm to design …


Several Problems In Nonlinear Schrödinger Equations, Tim Van Hoose Jan 2022

Several Problems In Nonlinear Schrödinger Equations, Tim Van Hoose

Masters Theses

“We study several different problems related to nonlinear Schrödinger equations….

We prove several new results for the first equation: a modified scattering result for both an averaged version of the equation and the full equation, as well as a set of Strichartz estimates and a blowup result for the 3d cubic problem.

We also present an exposition of the classical work of Bourgain on invariant measures for the second equation in the mass-subcritical regime”--Abstract, page iv.


Pressure Relief Wells: Analysis Of Subsurface Heterogeneity To Evaluate Relief Well Locations For Mississippi River Levees, Emma Marie Young Jan 2022

Pressure Relief Wells: Analysis Of Subsurface Heterogeneity To Evaluate Relief Well Locations For Mississippi River Levees, Emma Marie Young

Masters Theses

“When designing pressure relief well systems, it is imperative to understand what major geomorphology and heterogenies features are present, such as buried oxbow lakes, especially when the feature is parallel to the source, such as the Mississippi River. When present, there is a notable greater increase in head pressures, especially on the landward tow of the levee. This can cause erosional features that originally thought of to have been protected from by installing pressure relief wells. When comparing the effective hydraulic conductivities of horizontal clay layers and vertical clay layers spanning the length of the model, little to no noticeable …


Deep Learning-Based Surrogate Models For Post-Earthquake Damage Assessment, Xinzhe Yuan Jan 2022

Deep Learning-Based Surrogate Models For Post-Earthquake Damage Assessment, Xinzhe Yuan

Doctoral Dissertations

"Seismic damage assessment is a critical step to enhance community resilience in the wake of an earthquake. This study aims to develop deep learning-based surrogate models for widely used fragility curves to achieve more accurate and rapid assessment in practice. These surrogate models are based on artificial neural networks trained from the labelled ground motions whose resulting damage classes on targeted structures are determined by nonlinear time history analyses. The development of various surrogate models is progressed in four phases. In Phase I, the multilayer perceptron (MLP) is used to develop multivariate seismic classifiers with up to 50 hand-crafted intensity …


Mapping Log Pd/Cu Ratios In Vulcan And Investigation Into The Origin Of The Magenta Zone In The Northmet Deposit: Hoyt Lakes Minnesota, Usa, Paige M. C. M. Bauer Jan 2022

Mapping Log Pd/Cu Ratios In Vulcan And Investigation Into The Origin Of The Magenta Zone In The Northmet Deposit: Hoyt Lakes Minnesota, Usa, Paige M. C. M. Bauer

All Graduate Theses, Dissertations, and Other Capstone Projects

The purpose of this research is to investigate the origin of the PGE-rich Magenta Zone, a geologic feature within the NorthMet Deposit; a Cu-Ni-PGE deposit within a layered intrusion at the base of the 1.1 Ga Duluth Complex. The hypothesis is that a late-stage silicate magma containing dispersed sulfide droplets had infiltrated a permeable crystal mush resulting in the emplacement of the Magenta Zone. While mineralization is typically found along the base of the Duluth Complex, the Magenta Zone lies ~200 m above typical mineralization. Previous research has shown that the Magenta Zone cross cuts the younger concordant units. To …


A Game Theoretical Model Of Radiological Terrorism Defense, Shraddha Rane, Jason Timothy Harris Jan 2022

A Game Theoretical Model Of Radiological Terrorism Defense, Shraddha Rane, Jason Timothy Harris

International Journal of Nuclear Security

Radiological dispersal devices (RDD) pose a threat to the United States. Healthcare facilities housing high-risk radioactive materials and devices are potentially easy targets for unauthorized access and are vulnerable to malevolent acts of theft or sabotage. The three most attractive candidates for use in RDD considered in this study are: 60Co (radiosurgery devices), 137Cs (blood irradiators) and 192Ir (brachytherapy high dose radiation device). The threat posed by RDDs has led to evaluating the security risk of radioactive materials and defending against attacks. The concepts of risk analysis used in conjunction with game theory lay the foundations of …


Relative Tectonic Activity Assessment Of The Northern Sumatran Fault From Geomorphological And Morphotectonic Analyses, Aldo Febriansyah Putra Jan 2022

Relative Tectonic Activity Assessment Of The Northern Sumatran Fault From Geomorphological And Morphotectonic Analyses, Aldo Febriansyah Putra

Chulalongkorn University Theses and Dissertations (Chula ETD)

The Northern Sumatran Fault is a part of a trench-parallel strike-slip fault situated in oblique subduction setting. This study aims to assess the relative tectonic activity using geomorphic indices and to interpret the basin-forming mechanisms from geomorphic expressions in order to construct the schematic evolution of the Northern Sumatran Fault based on the development of transverse drainage basins and streams. This study utilized the 8.25-m digital elevation model released by the Geospatial Information Agency, the Republic of Indonesia, namely the DEMNAS. This study applied six geomorphic indices for assessing the relative tectonic activity: mountain-front sinuosity (Smf; average 1.14—1.94), valley width-to-height …


ตัวเร่งปฏิกิริยาแกน-เปลือก (Ni-Fe/Al2o3)@Sio2 สำหรับดรายรีฟอร์มมิงของมีเทน, สมิหรา แกล้วกสิกรรม Jan 2022

ตัวเร่งปฏิกิริยาแกน-เปลือก (Ni-Fe/Al2o3)@Sio2 สำหรับดรายรีฟอร์มมิงของมีเทน, สมิหรา แกล้วกสิกรรม

Chulalongkorn University Theses and Dissertations (Chula ETD)

การปล่อยแก๊สเรือนกระจกโดยเฉพาะแก๊สคาร์บอนไดออกไซด์และแก๊สมีเทนในปริมาณมากสู่ชั้นบรรยากาศเป็นผลให้อุณหภูมิเฉลี่ยของโลกเพิ่มสูงขึ้น ด้วยเหตุนี้งานวิจัยนี้จึงสนใจในการเปลี่ยนแก๊สเรือนกระจกเหล่านี้เป็นแก๊สสังเคราะห์ที่เป็นแก๊สผสมระหว่างคาร์บอนมอนอกไซด์และไฮโดรเจน โดยใช้ปฏิกิริยาดราย์รีฟอร์มมิงมีเทนบนตัวเร่งปฏิกิริยาในช่วงอุณหภูมิ 650 ถึง 850 องศาเซลเซียส ความสามารถในการเกิดปฏิกิริยาดราย์รีฟอร์มมิงมีเทนจะถูกรายงานในพจน์ของค่าการเปลี่ยนของมีเทน ค่าการเปลี่ยนของคาร์บอนไดออกไซด์ และอัตราส่วนโดยโมลระหว่างไฮโดรเจนต่อคาร์บอนมอนอกไซด์ในแก๊สผลิตภัณฑ์ จากการทดลอง พบว่า ความสามารถในการเกิดปฏิกิริยาดราย์รีฟอร์มมิงมีเทนสูงขึ้นเมื่อเพิ่มปริมาณนิกเกิลบนตัวรองรับอะลูมินา เนื่องจากช่วยเพิ่มปริมาณตำแหน่งกัมมันต์สำหรับการแตกพันธะคาร์บอน-ไฮโดรเจน (C-H) ของมีเทนและพันธะคาร์บอน-ออกซิเจน (C-O) ของคาร์บอนไดออกไซด์ ตัวเร่งปฏิกิริยา (10Ni/Al2O3)@1.01SiO2 ให้ค่าการเปลี่ยนของมีเทนสูงกว่าตัวเร่งปฏิกิริยา 10Ni/Al2O3 เนื่องจากมีพื้นที่ผิวจำเพาะและรูพรุนมากขึ้น จากผลอัตราส่วนระหว่างปริมาณนิกเกิลและเหล็กบนตัวเร่งปฏิกิริยา พบว่า ตัวเร่งปฏิกิริยา (9.5Ni0.5Fe/Al2O3)@1.01SiO2 ให้ค่าการเปลี่ยนของคาร์บอนไดออกไซด์สูงถึงร้อยละ 98 ที่ 850 องศาเซลเซียส เนื่องจากยับยั้งการหลอมรวมกันของนิกเกิลและต้านทานการเกิดโค้ก ชนิดและปริมาณตัวสนับสนุนต่างส่งผลต่อวามสามารถในการเกิดปฏิกิริยาดราย์รีฟอร์มมิง โดยค่าการเปลี่ยนของมีเทนเพิ่มสูงขึ้นถึงร้อยละ 96.2 และค่าการเปลี่ยนคาร์บอนไดออกไซด์ร้อยละ 97 ที่ 850 องศาเซลเซียส เมื่อเติมตัวสนับสนุนแคลเซียมที่ร้อยละ 3 โดยน้ำหนัก (ตัวเร่งปฏิกิริยา (9.5Ni0.5Fe3Ca/Al2O3)@1.01SiO2) งานวิจัยนี้ยังพบว่าตัวเร่งปฏิกิริยา (9.5Ni0.5Fe3Ca/Al2O3)@0.23SiO2 มีความว่องไวตลอดการใช้งานต่อเนื่อง 24 ชั่วโมงที่อุณหภูมิ 750 องศาเซลเซียส


การสังเคราะห์เมโซพอรัสซิลิกาแบบกลวงโดยใช้แม่แบบสารลดแรงตึงผิวผสมสำหรับการดักจับคาร์บอนไดออกไซด์, พชรภา สิงลี Jan 2022

การสังเคราะห์เมโซพอรัสซิลิกาแบบกลวงโดยใช้แม่แบบสารลดแรงตึงผิวผสมสำหรับการดักจับคาร์บอนไดออกไซด์, พชรภา สิงลี

Chulalongkorn University Theses and Dissertations (Chula ETD)

การเพิ่มขึ้นของจำนวนประชากรอย่างต่อเนื่องเป็นอีกหนึ่งปัจจัยที่กระตุ้นให้เกิดปัญหาภาวะโลกร้อนซึ่งมีสาเหตุมาจากการปลดปล่อยแก๊สเรือนกระจกและแก๊สคาร์บอนไดออกไซด์จนอุณหภูมิโลกสูงมากขึ้นประมาณ 1- 2 องศาเซลเซียสในช่วงทศวรรษที่ผ่านมา เพื่อลดการปลดปล่อยแก๊สคาร์บอนไดออกไซด์ที่เกิดขึ้นในชั้นบรรยากาศ รวมถึงลดผลลัพธ์จากภาวะเรือนกระจก งานวิจัยนี้มุ่งเน้นสนใจศึกษาการดักจับแก๊สคาร์บอนไดออกไซด์ด้วยการดูดซับบนตัวดูดซับเมโซพอรัสซิลิกาแบบกลวงที่เตรียมด้วยวิธีแม่แบบชนิดอ่อน โดยใช้แม่แบบร่วมของสารลดแรงตึงผิวผสมชนิดประจุบวกหรือแคทไอออนิก คือ ซิทิลไตรเมทิลแอมโมเนียมโบรไมด์ (CTAB) กับสารลดแรงตึงผิวประจุลบ คือ โซเดียมโดเดคซิลซัลเฟต (SDS) และโซเดียมเฮกซะเคดซิลไดฟีนิลออกไซด์ไดซัลโฟเนต (DF) และ สารผสมระหว่างโซเดียมโดเดคซิลซัลเฟต (SDS) และโซเดียมเฮกซะเคดซิลไดฟีนิลออกไซด์ไดซัลโฟเนต (DF) ที่อัตราส่วนโดยมวลต่าง ๆ จากนั้นทำการเคลือบฝังด้วย TEPA พบว่า ตัวดูดซับ HMS-SDS (0.23 g) 50TEPA และ ตัวดูดซับ HMS-SDS-DF 0.95-0.05 (0.23 g) 50TEPA ให้ค่าความว่องไวในการดูดซับคาร์บอนไดออกไซด์มากที่สุดเท่ากับ 2.95 และ 2.84 มิลลิโมลต่อกรัมของตัวดูดซับ ณ อุณหภูมิ 75 องศาเซลเซียส ตามลำดับ เมื่อทำการโหลดต่างชนิดแอมีน APTES, TSPD และ TEPA โดยให้ปริมาณไนโตรเจนที่โหลดเท่ากัน พบว่า TEPA ให้ค่าความว่องไวในการดูดซับคาร์บอนไดออกไซด์มากที่สุด อีกทั้งการทดสอบวงรอบการดูดซับ พบว่า ตัวดูดซับ HMS-SDS (0.23 g) 50TEPA และ ตัวดูดซับ HMS-SDS-DF 0.95-0.05 (0.23 g) 50TEPA ยังคงว่องไวต่อการดูดซับถึง 5 และ 11 รอบ ตามลำดับ ณ อุณหภูมิ 75 องศาเซลเซียส เมื่อเปรียบเทียบกับงานวิจัยก่อนหน้า พบว่า ตัวดูดซับที่ใช้ในงานวิจัยนี้ใช้ปริมาณการโหลดเอมีนน้อยกว่าแต่ให้ค่าความว่องไวในการดูดซับคาร์บอนไดออกไซด์มากกว่า


Rhodium-Catalyzed Decarbonylation Of Aroyl Chlorides, Wiktoria M. Koza Jan 2022

Rhodium-Catalyzed Decarbonylation Of Aroyl Chlorides, Wiktoria M. Koza

Dissertations

The development of efficient strategies for the synthesis of aryl–halogen bonds is highly desirable due to the prevalence of these moieties in pharmaceuticals, agrochemicals, and organic synthesis. Although there are numerous applications of aryl chlorides in chemistry, an efficient strategy for the preparation of these molecules is underdeveloped. Transition metal-catalyzed decarbonylation provides an efficient and selective approach for aryl–halogen bond formation. There has been significant progress in the development of new decarbonylation strategies, particularly involving aldehydes for the synthesis of new carbon–hydrogen (C–H) bonds or for cross-coupling reactions. However, transition metal-catalyzed decarbonylation methods for carbon–halogen (C–X) bond formation have been …


Synthesis And Characterization Of Ruthenium Complexes And Their Potential And Photosensitizers For Photodynamic Therapy, Keit Dine Jan 2022

Synthesis And Characterization Of Ruthenium Complexes And Their Potential And Photosensitizers For Photodynamic Therapy, Keit Dine

Master's Theses

Cancer is one of the leading causes of death in the world with over 10 million people dying of the disease every year. Inorganic complexes supported by platinum metal centers are often used in cancer treatment. However, these complexes lack selectivity for tumor cells. As such, other alternatives to platinum have been explored. Ruthenium (Ru) complexes are one of the most promising candidates due to their ability to be used as photosensitizing drugs in photodynamic therapy. Herein, we report the design, synthesis, and characterization of two novel ruthenium-based complexes. One compound is a Ru(II) homoleptic complex, while the other is …


A Holistic Approach To Hurricane Preparedness, Edwina A. Ward Jan 2022

A Holistic Approach To Hurricane Preparedness, Edwina A. Ward

Department of Conflict Resolution Studies Theses and Dissertations

Hurricanes are billion-dollar disasters, and current climate models suggest that their frequency and strength will only get worse because of global warming. Gulf Coast residents living in Florida, Louisiana, Mississippi, Alabama, and Texas worry about hurricane season annually and the goal of this dissertation was to measure their hurricane preparedness. This study surveyed 971 participants who have experienced hurricanes. Building on the theoretical foundations of quantitative survey research, the researcher conducted the study with the goal of answering the following questions: How do families in The Gulf Coast prepare for hurricanes, and how do local authorities prepare for the holistic …


Beyond Quenching Profile For Singular Semilinear Parabolic Partial Differential Equations With Mixed Boundary Conditions, Benjamin Thaitavorn Jan 2022

Beyond Quenching Profile For Singular Semilinear Parabolic Partial Differential Equations With Mixed Boundary Conditions, Benjamin Thaitavorn

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.


Numerical Approximation To Ruin Probability Of Generalization Of Classical Risk Model, Kittiwat Woragate Jan 2022

Numerical Approximation To Ruin Probability Of Generalization Of Classical Risk Model, Kittiwat Woragate

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.


Random Forest Of Mixed Decision Trees And Minority Condensation Decision Trees For Class Imbalanced Problem, Suvaporn Homjandee Jan 2022

Random Forest Of Mixed Decision Trees And Minority Condensation Decision Trees For Class Imbalanced Problem, Suvaporn Homjandee

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.


3d Building Internal Structural Component Segmentation From Point Cloud Data Using Dbscan And Modified Ransac With Normal Deviation Conditions, Thanapon Doougphummet Jan 2022

3d Building Internal Structural Component Segmentation From Point Cloud Data Using Dbscan And Modified Ransac With Normal Deviation Conditions, Thanapon Doougphummet

Chulalongkorn University Theses and Dissertations (Chula ETD)

Nowadays, the laser scanner plays an important role as a tool to capture building structure in a form of point cloud which can be used to draw a blueprint or a floor plan for reconstruction or renovation of an existing building. The point cloud data represent a shape or an object in three dimensions. This point cloud together with the utilization of Building Information Modeling (BIM) which is a workflow that provides information about the foundation and structure measurement of a building, make a planning and design to construction more convenient and efficient in several aspects than the traditional way. …


A Comparative Study On Out Of Scope Detection For Chest X-Ray Images, Nuttapol Kamolkunasiri Jan 2022

A Comparative Study On Out Of Scope Detection For Chest X-Ray Images, Nuttapol Kamolkunasiri

Chulalongkorn University Theses and Dissertations (Chula ETD)

Image classification models in actual applications may receive input outside the intended data distribution. For crucial applications such as clinical decision-making, it is critical that a model can recognize and describe such out-of-distribution (OOD) inputs. The objective of this study is to investigate the efficacy of several approaches for OOD identification in medical images. We examine three classes of OOD detection methods (Classification models, Confidence-based models, and Generative models) on the data of X-ray images. We found that simple classification methods and HealthyGAN perform the best overall. However, HealthyGAN cannot generalize to unseen scenarios, while classification models still retain some …


Investigate The Possibility Of Using Smart Contracts And Digital Signatures To Create A Legally Binding Contract, And To Create A Prototype Opensource Web Application As A Proof Of Concept, Yosnai Chanatrutipan Jan 2022

Investigate The Possibility Of Using Smart Contracts And Digital Signatures To Create A Legally Binding Contract, And To Create A Prototype Opensource Web Application As A Proof Of Concept, Yosnai Chanatrutipan

Chulalongkorn University Theses and Dissertations (Chula ETD)

We investigated the possibility of using blockchain to create a legally binding contract. According to our study, blockchain can be used to authenticate the identities of the involved parties, to provide a cryptographically generated electronic signature used to sign a contract, and to automate and enforce the term of an agreement. The authentication and the signing are done using a blockchain-based self-sovereign identity framework called a decentralized identity and verifiable credentials. The term can be enforced by using a smart contract, a program that runs on the blockchain. Some contracts terms are too complex to be translated into a smart …


Coastal Hazard Vulnerability Assessment Along The Coast Of Pranburi – Sam Roi Yot, Yrachuap Khiri Khan Province, Somruedee Kawlomlerd Jan 2022

Coastal Hazard Vulnerability Assessment Along The Coast Of Pranburi – Sam Roi Yot, Yrachuap Khiri Khan Province, Somruedee Kawlomlerd

Chulalongkorn University Theses and Dissertations (Chula ETD)

Pranburi - Sam Roi Yot coastal area consists of various coastal landforms such as rocky coasts, beaches, mangroves, and estuaries. These include several important places such as natural resources, tourist attractions, and significant economic areas of the province. In addition, there are a broad range of land use in this region, including agriculture, conservation, residence, hotels, and resorts. However, this coastal area is vulnerable to natural disasters, which can damage the local ecosystem and population. The objective of this study is to assess the physical damage from coastal hazards by using the Coastal Hazard Wheel (CHW) approach and also to …


Life Cycle Assessment Of Canned Fish Production In Thailand, Chanya Kraiwed Jan 2022

Life Cycle Assessment Of Canned Fish Production In Thailand, Chanya Kraiwed

Chulalongkorn University Theses and Dissertations (Chula ETD)

The canned fish industry is one of the world's most popular exports in Thailand. Moreover, the canned seafood industry ranks fourth in terms of energy consumption, which compares to all industry group (Wiriyatangsakul, 2021). Commercial competitiveness, on the other hand, must be improved because of the competitive conditions in the global market. Thus, this study evaluates the environmental performance of a factory in Samut Sakhon, Thailand, using Life Cycle Assessment (LCA) with Gate-to-Gate approach and setting functional unit by 1 ton fresh fish entering to process. The study used the SimaPro LCA application with the CML 2 baseline 2000 method, …