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Articles 36601 - 36630 of 302419

Full-Text Articles in Physical Sciences and Mathematics

Energy As A Limiting Factor In Neuronal Seizure Control: A Mathematical Model, Sophia E. Epstein Jan 2022

Energy As A Limiting Factor In Neuronal Seizure Control: A Mathematical Model, Sophia E. Epstein

CMC Senior Theses

The majority of seizures are self-limiting. Within a few minutes, the observed neuronal synchrony and deviant dynamics of a tonic-clonic or generalized seizure often terminate. However, a small epilesia partialis continua can occur for years. The mechanisms that regulate subcortical activity of neuronal firing and seizure control are poorly understood. Published studies, however, through PET scans, ketogenic treatments, and in vivo mouse experiments, observe hypermetabolism followed by metabolic suppression. These observations indicate that energy can play a key role in mediating seizure dynamics. In this research, I seek to explore this hypothesis and propose a mathematical framework to model how …

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Mary Eleanor Spear's Importance To The History Of Statistical Visualization, Melanie Williams Jan 2022

Mary Eleanor Spear's Importance To The History Of Statistical Visualization, Melanie Williams

CMC Senior Theses

This paper will demonstrate why Mary Eleanor Spear (1897-1986) is an important figure in the history of statistical visualization. She lead an impressive career working in the federal government as a data analyst before "data analyst" became a thing. She wrote and illustrated two comprehensive textbooks which furthered the art of statistical visualization. Her textbooks cover extensive graphing knowledge still valuable to statisticians and viewers today. Most notable of her works is her development of the box plot. In addition to Spear's career and contributions, this paper will also address the lack of female representation in science, technology, engineering, and …

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Temperature Trends In The Northeastern United States From 1950-2018, Emanuel Eagle Jan 2022

Temperature Trends In The Northeastern United States From 1950-2018, Emanuel Eagle

Environmental Studies Honors Papers

No abstract provided.

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A Comparative Analysis Of The Andes And The Himalayas: How Climate Change Effects The Health Of Glaciers And The Social Impacts This Has On Surrounding Communities, Jacqueline Mountford Jan 2022

A Comparative Analysis Of The Andes And The Himalayas: How Climate Change Effects The Health Of Glaciers And The Social Impacts This Has On Surrounding Communities, Jacqueline Mountford

Environmental Studies Honors Papers

The glacial ice in both the Andean and Himalayan Mountain ranges act as water towers for the billions of people that live within their watersheds. Throughout the year, these communities rely on the glacial meltwater to increase the flow of rivers, but this meltwater is the most impactful during the dry season when there is less precipitation. Communities in both the Andes and Himalayas use this glacial meltwater for human and animal consumption, agricultural purposes, and harnessing hydroelectric power as a clean energy source. One of the biggest worries for scientists and people around the world is how climate change …

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Computer Enabled Interventions To Communication And Behavioral Problems In Collaborative Work Environments, Ashutosh Shivakumar Jan 2022

Computer Enabled Interventions To Communication And Behavioral Problems In Collaborative Work Environments, Ashutosh Shivakumar

Browse all Theses and Dissertations

Task success in co-located and distributed collaborative work settings is characterized by clear and efficient communication between participating members. Communication issues like 1) Unwanted interruptions and 2) Delayed feedback in collaborative work based distributed scenarios have the potential to impede task coordination and significantly decrease the probability of accomplishing task objective. Research shows that 1) Interrupting tasks at random moments can cause users to take up to 30% longer to resume tasks, commit up to twice the errors, and experience up to twice the negative effect than when interrupted at boundaries 2) Skill retention in collaborative learning tasks improves with …

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A Spectrophotometric Determination Of Barium Complexation With Methylthymol Blue, Wesley Alexander Jan 2022

A Spectrophotometric Determination Of Barium Complexation With Methylthymol Blue, Wesley Alexander

Browse all Theses and Dissertations

In this work, a spectrophotometric titration of methylthymol blue (MTB) with barium chloride was performed at pH = 7.5, 9.6, and 12.2 to determine the stoichiometry of complexation between the two as well as formation constants and absorptivity coefficients. Complexes of 1:1, 2:1, and 3:1 Ba:MTB were suggested by the experimental data upon fitting with appropriate models using Beer’s Law. The molar absorptivities of free MTB species at 605 nm were determined to be ����2������4− = 5.0 (± 0.2) x 103 L·mol-1·cm-1, ����������5− = 7.3 (± 0.3) x 103 L·mol-1·cm-1, ��������6− = 1.3 (± 0.2) x 104 L·mol-1·cm-1. At pH …

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Estimation Of The Amount Of Active Pharmaceutical Ingredient In Over-The-Counter Available Aspirin Formulations Using Titrimetry, Uv-Visible Spectrophotometry And Raman Spectroscopy, Harismranjeet K. Chahal Jan 2022

Estimation Of The Amount Of Active Pharmaceutical Ingredient In Over-The-Counter Available Aspirin Formulations Using Titrimetry, Uv-Visible Spectrophotometry And Raman Spectroscopy, Harismranjeet K. Chahal

Browse all Theses and Dissertations

Counterfeit pharmaceuticals are a serious threat to public safety worldwide. Adverse health effects including resistance to treatment and death have resulted from the consumption of such medicines. Aspirin, which is a non-steroidal anti-inflammatory drug, has been counterfeited in the past due to its increasing demand. Rapid and easy analytical methods are needed to detect these counterfeit medicines and put a halt to the growing number of such incidents. In this study, quantitative estimation of active pharmaceutical ingredient (API) content in different over-the-counter available aspirin tablets was done using titrimetry and UV- Visible spectrophotometry. Qualitative analysis was done using Raman spectroscopy. …

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Automatically Generating Searchable Fingerprints For Wordpress Plugins Using Static Program Analysis, Chuang Li Jan 2022

Automatically Generating Searchable Fingerprints For Wordpress Plugins Using Static Program Analysis, Chuang Li

Browse all Theses and Dissertations

This thesis introduces a novel method to automatically generate fingerprints for WordPress plugins. Our method performs static program analysis using Abstract Syntax Trees (ASTs) of WordPress plugins. The generated fingerprints can be used for identifying these plugins using search engines, which have support critical applications such as proactively identifying web servers with vulnerable WordPress plugins. We have used our method to generate fingerprints for over 10,000 WordPress plugins and analyze the resulted fingerprints. Our fingerprints have also revealed 453 websites that are potentially vulnerable. We have also compared fingerprints for vulnerable plugins and those for vulnerability-free plugins.

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Synthesis Of Β,Β-Disubstituted Styrenes Via Trimethylsilyl Trifluoromethanesulfonate-Promoted Aldehyde-Aldehyde Aldol Addition-Deformylative Elimination., Grant J. Dixon, Michael R. Rodriguez, Tyler G. Chong, Kevin Y. Kim, C. Wade Downey Jan 2022

Synthesis Of Β,Β-Disubstituted Styrenes Via Trimethylsilyl Trifluoromethanesulfonate-Promoted Aldehyde-Aldehyde Aldol Addition-Deformylative Elimination., Grant J. Dixon, Michael R. Rodriguez, Tyler G. Chong, Kevin Y. Kim, C. Wade Downey

Chemistry Faculty Publications

In the presence of trimethylsilyl trifluoromethanesulfonate (TMSOTf) and 2,6-lutidine, α,α-disubstituted aldehydes condense with electron-rich aromatic aldehydes to yield β, β- disubstituted styrenes. More electron-rich aromatic aldehydes react more rapidly and in higher yield. Preliminary results suggest that the reaction may proceed via the ionization and formal deformylation of an aldol intermediate.

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Disability And Climate Change: A Critical Realist Model Of Climate Justice, Molly M. King, Maria A. Gregg Jan 2022

Disability And Climate Change: A Critical Realist Model Of Climate Justice, Molly M. King, Maria A. Gregg

Sociology

Existing literature on climate change as an issue of environmental justice documents the heightened vulnerability of people with disabilities to the effects of climate change. Additionally, there are numerous studies showing that access to information is a prerequisite for perceiving risk and taking action. Building on this work, our review seeks to understand how physical disability relates to perceptions of climate-related risk and adaptations to climate-related events. We introduce a critical realist model of climate justice to understand the relationships between the environmental features that disable, risk perception and information seeking, and adaptive capacity and resilience to climate change. In …

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An Attention-Based Resnet Architecture For Acute Hemorrhage Detection And Classification: Toward A Health 4.0 Digital Twin Study, Aftab Hussain, Muhammad Usman Yaseen, Muhammad Imran, Muhammad Waqar, Adnan Akhunzada, Mohammad Al-Ja'afreh, Abdulmotaleb El Saddik Jan 2022

An Attention-Based Resnet Architecture For Acute Hemorrhage Detection And Classification: Toward A Health 4.0 Digital Twin Study, Aftab Hussain, Muhammad Usman Yaseen, Muhammad Imran, Muhammad Waqar, Adnan Akhunzada, Mohammad Al-Ja'afreh, Abdulmotaleb El Saddik

Computer Vision Faculty Publications

Due to the advancement of digital twin (DT) technology, Health 4.0 applications have become reality and starting to take roots. In this article, we focus on intracranial hemorrhage (ICH) which is a life-threatening emergency that needs immediate diagnosis and treatment. ICH is caused by bleeding inside the skull or brain. Radiologists typically examine computed tomography (CT) scans of the patients to determine the ICH and its subtype. But the manual assessment of the CT scan is a complex and time-consuming task. The existing pre-trained convolutional neural network (CNN) models are state-of-the-art for ICH classification. However, they employ poor feature extraction …

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Eigenvalues Of Unitary Cayley Graph Of Matrix Algebras And Its Subconstituents, Jitsupat Rattanakangwanwong Jan 2022

Eigenvalues Of Unitary Cayley Graph Of Matrix Algebras And Its Subconstituents, Jitsupat Rattanakangwanwong

Chulalongkorn University Theses and Dissertations (Chula ETD)

No abstract provided.

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เอกซ์จีบูสต์สำหรับการคัดเลือกหลักทรัพย์ขนาดใหญ่และกลางในประเทศไทยแบบพหุปัจจัย, ธนดล ประพฤทธิกุล Jan 2022

เอกซ์จีบูสต์สำหรับการคัดเลือกหลักทรัพย์ขนาดใหญ่และกลางในประเทศไทยแบบพหุปัจจัย, ธนดล ประพฤทธิกุล

Chulalongkorn University Theses and Dissertations (Chula ETD)

วิธีการลงทุนแบบหมุนเวียนหลักทรัพย์ในพอร์ตโฟลิโอซึ่งจะทำการคัดเลือกหลักทรัพย์ที่มีค่าคะแนนสูงที่สุดเมื่อเปรียบเทียบกับหลักทรัพย์ตัวอื่นๆนี้ เป็นวิธีที่ได้รับความนิยมเมื่อเปรียบเทียบกับการเข้าซื้อขายตามสัญญาณแบบดั้งเดิม โดยปัจจุบันเทคโนโลยีการเรียนรู้ของเครื่องถูกนำมาประยุกต์ใช้กับงานต่างๆในชีวิตประจำวัน รวมถึงการลงทุนในตลาดหลักทรัพย์ด้วย ซึ่งการเรียนรู้ของเครื่องนี้สามารถนำมาใช้กับการลงทุนเชิงปริมาณเพื่อเพิ่มสมรรถนะของพอร์ตโฟลิโอสำหรับการลงทุนในตลาดการเงิน งานวิจัยนี้เสนอการใช้เอกซ์จีบูสต์สำหรับการคัดเลือกหลักทรัพย์แบบรายเดือนและรายไตรมาส ซึ่งแบบจำลองทั้งสองนี้ถูกพัฒนาบนชุดข้อมูลหลักทรัพย์ขนาดใหญ่และขนาดกลางในประเทศไทยโดยมีปัจจัยทั้งหมด 27 ปัจจัยแบ่งออกตามกลุ่มต่างๆได้ ดังนี้ ปัจจัยเชิงคุณค่า, ปัจจัยการเติบโตของกิจการ, ปัจจัยแนวโน้มของราคา, ปัจจัยสภาพคล่อง, ปัจจัยคุณภาพ, ปัจจัยเงินปันผล และปัจจัยด้านขนาด เพื่อใช้เป็นตัวแปรต้น สำหรับให้แบบจำลองเรียนรู้และจากผลการศึกษา พบว่า ปัจจัยเชิงเทคนิคเป็นปัจจัยที่มีความสำคัญสำหรับการทำนายการเคลื่อนไหวของราคาสินทรัพย์แบบรายเดือน ซึ่งแตกต่างกับการเคลื่อนไหวของราคาสินทรัพย์แบบรายไตรมาสที่ปัจจัยพื้นฐานจะมีความสำคัญมากกว่าปัจจัยเชิงเทคนิค นอกจากนี้ เมื่อจำลองการสร้างพอร์ตโฟลิโอการหมุนเวียนหลักทรัพย์แบบรายเดือนและรายไตรมาส พบว่า พอร์ตโฟลิโอแบบรายเดือนให้ค่าสถิติในเชิงพอร์ตโฟลิโอที่ดีกว่าซึ่งเป็นเพราะพอร์ตโฟลิโอดังกล่าวมีโอกาสในการคัดเลือกหลักทรัพย์ใหม่ๆเข้ามาในพอร์ตโฟลิโอได้มากกว่า อย่างไรก็ตาม ในด้านค่าสถิติของการซื้อขายกลับพบว่าพอร์ตโฟลิโอแบบรายไตรมาสกลับให้ค่าที่ดีกว่า เนื่องจากระยะเวลาการถือครองหลักทรัพย์ที่นานขึ้นทำให้มีค่าผลตอบแทนคาดหวังต่อการซื้อขายที่สูงขึ้น ทั้งนี้ พอร์ตโฟลิโอทั้งสองยังคงให้ระดับผลตอบแทนต่อความเสี่ยงที่สูงกว่าดัชนีอ้างอิงทั้งหมดประกอบด้วย ดัชนี SET TRI, ดัชนีที่ให้น้ำหนักการลงทุนแบบเท่าเทียม, และดัชนีผลตอบแทนแบบปัจจัยเดียว

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ปัจจัยคัดสรรที่มีความสัมพันธ์กับพฤติกรรมการป้องกันการติดเชื้อไวรัสโคโรนา 2019 ของอาสาสมัครฉุกเฉินการแพทย์ ประเทศไทย, จารุวรรณ พฤทธยานันต์ Jan 2022

ปัจจัยคัดสรรที่มีความสัมพันธ์กับพฤติกรรมการป้องกันการติดเชื้อไวรัสโคโรนา 2019 ของอาสาสมัครฉุกเฉินการแพทย์ ประเทศไทย, จารุวรรณ พฤทธยานันต์

Chulalongkorn University Theses and Dissertations (Chula ETD)

การวิจัยครั้งนี้เพื่อศึกษาความสัมพันธ์และอำนาจทำนายระหว่างความรู้ ทัศนคติ การรับรู้โอกาสเสี่ยงของการเกิดโรค การรับรู้ความรุนแรงของโรค การรับรู้ประโยชน์ของการปฏิบัติเพื่อป้องกันโรค การรับรู้อุปสรรคของการปฏิบัติเพื่อป้องกันโรค พฤติกรรมเกี่ยวกับการจัดการความรู้ แรงสนับสนุนทางสังคม การเปิดรับข่าวสาร และพฤติกรรมกับการป้องกันการติดเชื้อไวรัสโคโรนา 2019 ของอาสาสมัครฉุกเฉินการแพทย์ ประเทศไทย การวิจัยแบบบรรยายเชิงความสัมพันธ์ กลุ่มตัวอย่าง คือ อาสาสมัครฉุกเฉินการแพทย์ ในประเทศไทย จำนวน 165 คน คัดเลือกกลุ่มตัวอย่างด้วยวิธีการสุ่มแบบหลายขั้นตอน เครื่องมือวิจัย คือ แบบสอบถามออนไลน์ 8 ส่วน สถิติที่ใช้ในการวิเคราะห์ข้อมูล ได้แก่ สถิติเชิงพรรณนา ค่าสัมประสิทธิ์สหสัมพันธ์ของสเปียร์แมน และสถิติถดถอยพหุคูณแบบขั้นตอน ผลการวิจัย 1) ปัจจัยด้านทัศนคติ การรับรู้โอกาสเสี่ยงของการเกิดโรค การรับรู้ความรุนแรงของโรค การรับรู้ประโยชน์ของการปฏิบัติเพื่อป้องกันโรค การรับรู้อุปสรรคของการปฏิบัติเพื่อป้องกันโรค พฤติกรรมเกี่ยวกับการจัดการความรู้ แรงสนับสนุนทางสังคม และการเปิดรับข่าวสาร มีความสัมพันธ์ทางบวกกับพฤติกรรมกับการป้องกันการติดเชื้อไวรัสโคโรนา 2019 อย่างมีนัยสำคัญทางสถิติที่ระดับ .05 2) ปัจจัยที่ร่วมกันทำนายพฤติกรรมกับการป้องกันการติดเชื้อไวรัสโคโรนา 2019 ของอาสาสมัครฉุกเฉินการแพทย์ อย่างมีนัยสำคัญทางสถิติที่ระดับ .05 ได้แก่ แรงสนับสนุนทางสังคม การรับรู้ประโยชน์ของการปฏิบัติเพื่อป้องกันโรค และการเปิดรับข่าวสาร โดยสามารถร่วมกันทำนายได้ร้อยละ 66.7

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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.

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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 …

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Persistence Of Height Fluctuation In Molecular-Beam Epitaxy Model, Pipitton Sanseeha Jan 2022

Persistence Of Height Fluctuation In Molecular-Beam Epitaxy Model, Pipitton Sanseeha

Chulalongkorn University Theses and Dissertations (Chula ETD)

Persistence probability is an interesting quantity in stochastic process which is the dynamics of surface growth in this study. Persistence probability of height f luctuation is the probability that the height fluctuation does not return to its initial value throughout a time interval. In this work, we use a numerical simulation approach to investigate the persistence probability in Molecular-Beam Epitaxy (MBE) model which is associated with Molecular-Beam Epitaxy technique. First half, we study the effects of temperature and deposition rate on the growth exponent () and persistence exponent (). For the temperature corresponds to 1 diffusion length, we get 017 …

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A Divide & Concur Approach To Collaborative Goal Modeling With Merge In Early-Re: Supplemental Material, Kathleen R. Hablutzel, Anisha Jain, Alicia M. Grubb Jan 2022

A Divide & Concur Approach To Collaborative Goal Modeling With Merge In Early-Re: Supplemental Material, Kathleen R. Hablutzel, Anisha Jain, Alicia M. Grubb

Computer Science: Faculty Publications

Supplemental material for the paper:
"A Divide & Concur Approach to Collaborative Goal Modeling with Merge in Early-RE"
This paper proposes a formal approach to the problem of merging the attributes of intentions and actors, once these elements have been matched.

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Three Major Instructional Approaches For Requirements Engineering, Marian Daun, Alicia M. Grubb, Bastian Tenbergen Jan 2022

Three Major Instructional Approaches For Requirements Engineering, Marian Daun, Alicia M. Grubb, Bastian Tenbergen

Computer Science: Faculty Publications

In this talk, we report on our findings from the paper A Survey of Instructional Approaches in the Requirements Engineering Education Literature [DGT21], which has been accepted at and published in the proceedings of the 2021 IEEE International Conference on Requirements Engineering. The paper reports the findings of a systematic literature review to define and investigate the current state of research on requirements engineering education.

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Surficial Geologic Map Of The Constantine 7.5-Minute Quadrangle, Kentucky, Maxwell L. Hammond Iii, Antonia E. Bottoms, Matthew Massey, Emily Morris, Michele Mchugh Jan 2022

Surficial Geologic Map Of The Constantine 7.5-Minute Quadrangle, Kentucky, Maxwell L. Hammond Iii, Antonia E. Bottoms, Matthew Massey, Emily Morris, Michele Mchugh

Contract Reports--KGS

The Constantine 7.5-minute quadrangle is located west of Elizabethtown along the boundary of Hardin and Breckinridge Counties. The quadrangle lies along the northern section of the Dripping Springs Escarpment, which separates the Mammoth Cave Plateau and Pennyroyal regions of the Mississippian Sinkhole Plain physiographic province (McFarlan, 1943). Topography is mostly characterized by high-elevation plateaus, ridges, and knobs of the Mammoth Cave Plateau (up to 919 ft), which have been intensely dissected by the Rough River and its tributaries (down to 516 ft). A small area of the Pennyroyal extends into the eastern part of the quadrangle, which is marked by …

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Decomposing Manifolds In Low-Dimensions: From Heegaard Splittings To Trisections, Suixin "Cindy" Zhang Jan 2022

Decomposing Manifolds In Low-Dimensions: From Heegaard Splittings To Trisections, Suixin "Cindy" Zhang

Honors Theses

The decomposition of a topological space into smaller and simpler pieces is useful for understanding the space. In 1898, Poul Heegaard introduced the concept of a Heegaard splitting, which is a bisection of a 3-manifold. Heegaard diagrams, which describe Heegaard splittings combinatorially, have been recognized as a powerful tool for classifying 3-manifolds and producing important invariants of 3-manifolds. Handle decomposition, invented by Stephen Smale in 1962, describes how an n-manifold can be constructed by successively adding handles. In 2012, Gay and Kirby introduced trisections of 4-manifold, which are a four-dimensional analogues of Heegaard splittings in dimension three. Trisection diagrams give …

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On-Ice Detection, Classification, Localization And Tracking Of Anthropogenic Acoustic Sources With Machine Learning, Steven J. Whitaker Jan 2022

On-Ice Detection, Classification, Localization And Tracking Of Anthropogenic Acoustic Sources With Machine Learning, Steven J. Whitaker

Dissertations, Master's Theses and Master's Reports

Arctic acoustics have been of concern in recent years for the US navy. First-year ice is now the prevalent factor in ice coverage in the Arctic, which changes the previously understood acoustic properties. Due to the ice melting each year, anthropogenic sources in the Arctic region are more common: military exercises, shipping, and tourism. For the navy, it is of interest to detect, classify, localize, and track these sources to have situational awareness of these surroundings. Because the sources are on-water or on-ice, acoustic radiation propagates at a longer distance and so acoustics are the method by which the sources …

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Toward Deep Learning Emulators For Modeling The Large-Scale Structure Of The Universe, Neerav Kaushal Jan 2022

Toward Deep Learning Emulators For Modeling The Large-Scale Structure Of The Universe, Neerav Kaushal

Dissertations, Master's Theses and Master's Reports

Multi-billion dollar cosmological surveys are being conducted almost every decade in today’s era of precision cosmology. These surveys scan vast swaths of sky and generate tons of observational data. In order to extract meaningful information from this data and test these observations against theory, rigorous theoretical predictions are needed. In the absence of an analytic method, cosmological simulations become the most widely used tool to provide these predictions in order to test against the observations. They can be used to study covariance matrices, generate mock galaxy catalogs and provide ready-to-use snapshots for detailed redshift analyses. But cosmological simulations of matter …

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Spatial Variation Of Subduction Zone Fluids During Progressive Subduction: Insights From Serpentinite Mud Volcanoes, Catriona D. Menzies, Roy E. Price, Jeffrey Ryan, Olivier Sissmann, Ken Takai, C. Geoffrey Wheat Jan 2022

Spatial Variation Of Subduction Zone Fluids During Progressive Subduction: Insights From Serpentinite Mud Volcanoes, Catriona D. Menzies, Roy E. Price, Jeffrey Ryan, Olivier Sissmann, Ken Takai, C. Geoffrey Wheat

School of Geosciences Faculty and Staff Publications

Geological processes at subduction zones control seismicity, plutonism and volcanism, and geochemical cycling between the oceans, crust, and mantle. The down-going plate experiences metamorphism, and the associated dehydration and fluid flow alters the physical properties of the plate interface and mantle wedge, as well as controlling the composition of material descending into the mantle. Any direct study of slab evolution during subduction is inhibited by the prohibitive depths at which these processes occur. To examine these processes we use serpentinite mud volcanoes in the Mariana forearc, that permit sampling of serpentinite materials and their pore waters that …

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The Legacy Of Hurricanes, Historic Land Cover, And Municipal Ordinances On Urban Tree Canopy In Florida (United States), Allyson B. Salisbury, Andrew K. Koeser, Richard J. Hauer, Deborah R. Hilbert, Amr H. Abd-Elrahman, Michael G. Andreu, Katie Britt, Shawn Landry, Mary G. Lusk, Jason W. Miesbauer, Hunter Thorn Jan 2022

The Legacy Of Hurricanes, Historic Land Cover, And Municipal Ordinances On Urban Tree Canopy In Florida (United States), Allyson B. Salisbury, Andrew K. Koeser, Richard J. Hauer, Deborah R. Hilbert, Amr H. Abd-Elrahman, Michael G. Andreu, Katie Britt, Shawn Landry, Mary G. Lusk, Jason W. Miesbauer, Hunter Thorn

School of Geosciences Faculty and Staff Publications

Urban Tree Canopy (UTC) greatly enhances the livability of cities by reducing urban heat buildup, mitigating stormwater runoff, and filtering airborne particulates, among other ecological services. These benefits, combined with the relative ease of measuring tree cover from aerial imagery, have led many cities to adopt management strategies based on UTC goals. In this study, we conducted canopy analyses for 300 cities in Florida to assess the impacts of development practices, urban forest ordinances, and hurricanes on tree cover. Within the cities sampled, UTC ranged from 5.9 to 68.7% with a median canopy coverage of 32.3% Our results indicate that …

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How To Deal With Conflict Of Interest Situations When Selecting The Best Submission, Olga Kosheleva, Vladik Kreinovich Jan 2022

How To Deal With Conflict Of Interest Situations When Selecting The Best Submission, Olga Kosheleva, Vladik Kreinovich

Departmental Technical Reports (CS)

In many practical situations when we need to select the best submission -- the best paper, the best candidate, etc. -- there are so few experts that we cannot simply dismiss all the experts who have conflict of interest: we do not want them to judge their own submissions, but we would like to take into account their opinions of all other submissions. How can we take these opinions into account? In this paper, we show that a seemingly reasonable idea can actually lead to bias, and we explain how to take these opinions into account without biasing the final …

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Search Under Uncertainty Should Be Randomized: A Lesson From The 2021 Nobel Prize In Medicine, Martine Ceberio, Vladik Kreinovich Jan 2022

Search Under Uncertainty Should Be Randomized: A Lesson From The 2021 Nobel Prize In Medicine, Martine Ceberio, Vladik Kreinovich

Departmental Technical Reports (CS)

In many real-life situations, we know that one of several objects has the desired property, but we do not know which one. To find the desired object, we need to test these objects one by one. In situations when we have no additional information, there is no reason to prefer any testing order and thus, a usual recommendation is to test them in any order. This is usually interpreted as ordering the objects in the increasing value of some seemingly unrelated quantity. A possible drawback of this approach is that it may turn out that the selected quantity is correlated …

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How To Elicit Complex-Valued Fuzzy Degrees, Laxman Bokati, Olga Kosheleva, Vladik Kreinovich Jan 2022

How To Elicit Complex-Valued Fuzzy Degrees, Laxman Bokati, Olga Kosheleva, Vladik Kreinovich

Departmental Technical Reports (CS)

In the traditional fuzzy logic, an expert's degree of certainty in a statement is described by a single number from the interval [0,1]. However, there are situations when a single number is not sufficient: e.g., a situation when we know nothing and a situation in which we have a lot of arguments for a given statement and an equal number of arguments against it are both described by the same number 0.5. Several techniques have been proposed to distinguish between such situations. The most widely used is interval-valued technique, where we allow the expert to describe his/her degree of certainty …

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On Flow Polytopes, Nu-Associahedra, And The Subdivision Algebra, Matias Von Bell Jan 2022

On Flow Polytopes, Nu-Associahedra, And The Subdivision Algebra, Matias Von Bell

Theses and Dissertations--Mathematics

This dissertation studies the geometry and combinatorics related to a flow polytope Fcar(ν) constructed from a lattice path ν, whose volume is given by the ν-Catalan numbers. It begins with a study of the ν-associahedron introduced by Ceballos, Padrol, and Sarmiento in 2019, but from the perspective of Schröder combinatorics. Some classical results for Schröder paths are extended to the ν-setting, and insights into the geometry of the ν-associahedron are obtained by describing its face poset with two ν-Schröder objects. The ν-associahedron is then shown to be dual to a framed triangulation of Fcar(ν), which is a …

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

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

MSU Graduate Theses

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.

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