Physical Sciences and Mathematics Commons^™

Present Situation And Prospects Of Tourism Resource Evaluation In Abandoned Mining Areas, Wang Qiuju, Wang Yue, Ma Yuying, Zhang Bo

Coal Geology & Exploration

The identification and evaluation of tourism resources are important basis for tourism planning and development in abandoned mining areas. This paper adopts literature review method and inductive analysis method to comprehensively sort out the domestic and foreign research results on the value evaluation of tourism resources in abandoned mining areas, and systematically analyze the identification, evaluation system construction and evaluation methods of tourism resources in abandoned mining areas. It is found that the current understanding of tourism resources in abandoned mining areas is only at the level of mining relics and mining heritage, lacking emphasis on the natural resources such …

Research On Redevelopment Model Of Abandoned Mining Land From The Perspective Of Property Right Policy, Deng Yuanyuan, Chang Jiang, Feng Shanshan, Zhou Xue

Coal Geology & Exploration

The reuse of abandoned mines has become the main path for resource-based cities to realize functional transformation. The redevelopment of mining land belongs to the renewal of urban stock industrial land, which is a spatial transformation process accompanied by property right transfer. The research on the evolution of the relationship between relevant property rights policies and abandoned mine redevelopment model is helpful to understand the impact of the policy and put forward suggestions for future policies. This paper combs the national and local property rights policies since 1990, takes the redevelopment practice in different times of this period as an …

Refined 3d Modeling Of Rock And Mine Specimens In Xishan Coalfield And Its Virtual Simulation Platform Construction, Zhang Qiongyue, Chen Liming, Zhao Jingui, Wang Jianmin

Coal Geology & Exploration

Rock and mineral specimens are unique and non-renewable. The traditional collection display is not convenient for professional academic exchanges, which limits the efficient development of the popularization of geosciences. 350 representative rock and mineral specimens of Xishan Coalfield in Taiyuan City are collected to explore the fine 3D modeling of small-scale rock and mineral specimens and to construct a virtual simulation platform. First, the multi-view image 3D reconstruction technology to design a matching three-dimensional ring object photography device is used to collect image data. Then modeling accuracy is optimized from two aspects of original image quality and modeling software. Finally, …

Geochemical Characteristics Of Rare Earth Elements In Surface Sediments From Huainan Coal Mining Subsidence Area, Anhui Province, China, Qian Yinghua, Zheng Liugen, Chen Yuanping, Jiang Chunlu, Chen Xing, Chen Yongchun

Coal Geology & Exploration

Rare earth elements(REEs) are widely used in environmental geochemical analysis process research due to their unique chemical characteristics. This study investigated the geochemical characteristics of rare earth elements in surface sediment from the Huainan coal mining subsidence area, Anhui Province, China. Twelve surface sediment samples were collected from Panyi, Guqiao and Xieqiao subsidence areas in the study area. The content of rare earth elements in the samples was tested and analyzed by ICP-MS, and the distribution characteristics and controlling factors of REEs and its material sources were discussed. The results show that the rare earth element content in the surface …

Progress In Investigation Technology For Coal Mine Goafs Under Buildings And Structures In China, Liu Xiaoping

Coal Geology & Exploration

The investigation of goafs in the coal mine is a major technical problem that restricts the normal engineering construction and safe operation of the upper site. Looking back at the establishment of coal mine goaf prospecting technical specifications in China, the results obtained in the past three decades are reviewed in the goaf prospecting methods, the deformation prediction, stability evaluation, etc. Some representative problems are pointed out in the current actual investigation work, such as the poor guidance of the investigation outline, the inadequate integration of drilling technical requirements with the investigation work, the inability of engineering geophysical exploration to …

Principle Of A Self-Protective Sealing Device For Mwd And Its Influencing Factors, Wang Yaoming, Ye Genfei, Zhao Yongzhe, Gao Ke, Liu Weiwei, Duan Huijun

Coal Geology & Exploration

For deeper drilling depth and longer service life of MWD, a self-protection sealing device for the MWD instrument is designed given the defects of the combined static sealing structure. The relationship between rubber airbag expansion displacement and air pressure was studied through static expansion numerical simulation. On this basis, the reasons for different results due to different model sizes were analyzed, and the factors causing the different simulation results of the self-protection sealing device were discussed. The four independent variables of airbag diameter, width, wall thickness and inner cavity width were determined and simulated to explore their relationship with the …

Temporal And Spatial Changes Of Terrestrial Water Storage In Yellow River Basin Based On Grace, Yang Fei, Zhang Chengye, Li Jun, Song Ziheng, Guo Tianyu

Coal Geology & Exploration

The Yellow River Basin is currently the main gathering place both for economically recoverable coal and coal production in China. Understanding the water sources and its changes is not only a prerequisite for promoting the intensive use of water in the Yellow River Basin, but also the basis for carrying out the ecological protection and sustainable development of the mining areas in the Yellow River Basin. Compared with traditional methods for monitoring terrestrial water storage that are limited by the distribution and number of monitoring points, GRACE provides a new way to study the temporal and spatial changes of water …

Examining Bacteriophage Reliance On The Tola Protein Of Escherichia Coli, Ellen Davis

Honors Projects

With the ever-growing crisis of antibiotic resistant bacteria, bacteriophage provide an important potential alternative therapy to treat infections when antibiotics are ineffective. For this reason, it is important to understand the mechanisms bacteriophage use to enter their bacterial host cell. The cellular envelope of the gram-negative bacterium E. coli contains a protein system known as Tol-Pal, which utilizes energy from the Proton Motive Force to carry out several cellular functions, including some associated with cellular division and outer-membrane stability. Certain bacteriophage take advantage of the energy produced by this system to cross the bacterial cell membrane. One important protein of …

Quantization For Infinite Affine Transformations, Dogan Comez, Mrinal Kanti Roychowdhury

School of Mathematical & Statistical Sciences Faculty Publications

Quantization for a probability distribution refers to the idea of estimating a given probability by a discrete probability supported by a finite set. In this article, we consider a probability distribution generated by an infinite system of affine transformations {S-ij} on R-2 with associated probabilities {p(ij)} such that p(ij) > 0 for all i, j is an element of N and Sigma(infinity)(i,j=1) p(ij) = 1. For such a probability measure P, the optimal sets of n-means and the nth quantization error are calculated for every natural number n. It is shown that the distribution of such a probability measure is the …

A Study Of Semiprime Arithmetic Sequences, Sam C. Uselton

Honors Scholars Collaborative Projects

Semiprimes are positive integers of the form n = p*q where p and q are primes that are not necessarily distinct. Semiprimes can occur in arithmetic sequence, and the upper bound changes depending on the distance, d, between semiprimes in the sequence. The goal of this work is to present and prove theorems for different cases of semiprime arithmetic sequences, including d = 2k+1 where k is greater than or equal to 0 and d=2k where k is positive and not a multiple of 3, as well as a general case for finding upper bounds for varying distances. The building …

Tracking Academic Success And Its Relationship With Student Success Center Usage And Demographics, Samuel D. Johnson

Honors Capstone Projects and Theses

No abstract provided.

Design And Characterization Of Frequency Tripling Mirrors, Amir Khabbazi Oskouei

Optical Science and Engineering ETDs

Aperiodic stacks of dielectric low- and high-index films can be designed to enhance third-harmonic generation (THG) in reflection of near infrared laser pulses using computer optimization. Numerical and analytical results suggest that the TH energy increases rapidly with increasing number of films and the ratio of the high and low index.

Our optical matrix based THG model that takes into account the full pulse bandwidth predicts conversion efficiencies of about 7% for transform-limited Gaussian pulse bandwidths of 16 nm for mirrors with 45 layers, which exceed those expected from periodic designs. Stability against film thickness fluctuations expected from the deposition …

Phishing For Fun, Madeline Moran

Computer Science Research Seminars and Symposia

The process of a phishing experiment that will be used to investigate a possible correlation between a person thinking style and their susceptibility to phishing scams.

3d Flow Field Measurements Outside Nanopores, Jeffrey Mc Hugh, Alice L. Thorneywork, Kurt Andresen, Ulrich F. Keyser

Physics and Astronomy Faculty Publications

We demonstrate a non-stereoscopic, video-based particle tracking system with optical tweezers to study fluid flow in 3D in the vicinity of glass nanopores. In particular, we used the quadrant interpolation algorithm to extend our video-based particle tracking to displacements out of the trapping plane of the tweezers. This permitted the study of flow from nanopores oriented at an angle to the trapping plane, enabling the mounting of nanopores on a micromanipulator with which it was then possible to automate the mapping procedure. Mapping of the voltage driven flow in 3D volumes outside nanopores revealed polarity dependent flow fields. This is …

A Novel Nonparametric Test For Heterogeneity Detection And Assessment Of Fluid Removal Among Crrt Patients In Icu, Shaowli Kabir

Theses and Dissertations--Epidemiology and Biostatistics

Over the past decade acute kidney injury (AKI) has been occurring among 20%-50% of patients admitted to the intensive care unit (ICU) in United States. Continuous renal replacement therapy (CRRT) has become a popular treatment method among these critically ill patients. But there are multiple complications in implementing this treatment, including discrepancies in practiced and prescribed fluid removal, possibly related to the heterogeneity among these patients. With mixture modeling there have been several techniques in detecting heterogeneity with their specific limitations. In this dissertation a novel nonparametric ‘d test’ will be used to detect heterogeneity among CRRT patients in ICU. …

An Educator’S Perspective Of The Tidyverse, Mine Çetinkaya-Rundel, Johanna Hardin, Benjamin Baumer, Amelia Mcnamara, Nicholas J. Horton, Colin W. Rundel

Statistical and Data Sciences: Faculty Publications

Computing makes up a large and growing component of data science and statistics courses. Many of those courses, especially when taught by faculty who are statisticians by training, teach R as the programming language. A number of instructors have opted to build much of their teaching around use of the tidyverse. The tidyverse, in the words of its developers, “is a collection of R packages that share a high-level design philosophy and low-level grammar and data structures, so that learning one package makes it easier to learn the next” (Wickham et al. 2019). These shared principles have led to the …

Random Variable Shape Parameter Strategy To Minimize Error In Oscillatory Radial Basis Function Approximation Method For Solving Partial Differential Equations., Quinnlan Paul Aiken

ONU Student Research Colloquium

Approximation of the functions which are the solutions of complex or difficult problems is a worthwhile endeavor. This has resulted in many ways to effectively approximate the solution of the partial differential equations. One such way to approximate the solution of the partial differential equation is Oscillatory radial basis function method. This method can approximate the solution of the partial differential equation well however relies heavily on a “shape parameter” to achieve acceptable error. Choosing this parameter was traditionally done through a trial-and-error method. Selecting shape parameters in a more analytical way has been desired. One such method is the …

A Novel Tcr Clustering Method For Sars-Cov-2 Epitopes, Naziba A. Nuha

Mathematics Colloquium Series

T-cell epitopes are peptides generated from antigens that are presented by MHC class I and class II molecules to T-cells. These epitopes are usually identified by T-cell receptors (TCRs) of CD4 T-cells which then causes transformation of CD4 T-cells to helper or regulatory T cells. Recently, there has been growing interest in the role of T cells and their involvement in various ailments including SARS-COV-2, cancer, autoimmune diseases and other infectious diseases. However, the mechanism of TCR epitope recognition by Tcell receptors (TCRs) of CD4 T-cells at a repertoire level is still not fully understood. In this project, we reviewed …

Artsy Chaos: The Secret Life Of A Class Of Trigonometric Sums, Kaleb Swieringa, Joelena Brown, Rachael Harbaugh, Francis Nadolny

ONU Student Research Colloquium

We start from classical trigonometric sums (of terms such as k^n*cos(k), k^n*sin(k) - where n is a positive integer). These classical sums allow fairly straightforward closed form representations. In our work we considered changing the arguments of the trigonometric factors to powers (so that they get replaced by cos(k^a) and sin(k^a) - for a positive real exponent that may or may not be an integer), while also introducing in any term of such a sum a "rotational" factor of the form omega^k, where "omega" is a complex number of modulus 1 (that may or may not be a root of …

A Strange Attractor Of Primes, Alexander Hare

ONU Student Research Colloquium

The greatest prime factor sequences (GPF sequences), born at ONU in 2005, are integer sequences satisfying recursions in which every term is the greatest prime factor of a linear combination with positive integer coefficients of the preceding k terms (where k is the order of the sequence), possibly including a positive constant. The very first GPF sequence that was introduced satisfies the recursion x(n+1)=GPF(2*x(n)+1). In 2005 it was conjectured that no matter the seed, this particular GPF sequence enters the limit cycle (attractor) 3-7-5-11-23-47-19-13. In our current work, of a computational nature, we introduce the functions “depth” – where depth(n) …

The Phosphorus Problem In The Pre-Biotic World, Erica Bronwyn Mobley

ONU Student Research Colloquium

The so-called “phosphorus problem” in prebiotic life has traditionally been framed in terms of phosphate solubility. Phosphates (PO₄^3-) are generally insoluble and therefore cannot supply adequate nutrients for protocellular metabolism. Phosphite (HPO₃^2-) is thought to solve this problem, but introduces a new obstacle, what might be termed the “phosphorus permeability problem”. Phosphate and phosphite are both charged at circumneutral pH and cannot cross a lipid membrane. No evolutionary pressure exists to drive formation of transporters prior to the existence of a membrane, and so the first protocells likely lacked transporters. We suggest that volatile …

Evaluating The Impact Of River Settlement On Phosphorus Uptake, Erica Bronwyn Mobley

ONU Student Research Colloquium

Phosphorus sorption to sediments is an important process that can buffer dissolved P concentrations. Both the amount of P and sediment as well as the mode of binding can influence transport of P in aquatic ecosystems. This study focused on determining sediment stocks in the Maumee River basin and quantifying reactive and total P extracted from sediment by a sequential multi-step process. Quantification of sediment stock will enable more accurate modeling of P retention and ultimately P loading into western Lake Erie.

How Student Attitudes Have Changed Toward Chemistry Due To The Implementation Of Hybrid Labs, Erica Bronwyn Mobley

ONU Student Research Colloquium

Hybrid chemistry labs in schools and universities have become much more common due to the COVID-19 pandemic. Previous research on student perceptions of chemistry has shown a correlation between their attitudes and performance in this subject that educators are still seeking to understand. This mixed methods study compared perceptions of students in traditional, in-person labs (pre-COVID, 2017) with students in a mixture of virtual and in-person labs (during COVID, 2020) over the course of a semester. The Attitude toward the Study of Chemistry Inventory (ASCI) survey was given to both cohorts of students and focused on five areas related to …

Connections Between Interglacial Variation And Lithological Variability Within Midland Basin Permian Shale Rocks In Martin County, Texas, Helen Rice Hammon

LSU Master's Theses

The Upper Pennsylvanian (323.2–289.9 Ma) and Lower Permian (289.9-251 Ma), (Wolfcamp and Spraberry formations) interval of the Midland Basin, West Texas, contains a mixed succession of shale, carbonate, and siltstone/sandstone lithofacies that accumulated in a deep-water marine environment under variable hydrographic restrictions. The heterogenous stratigraphy found in the Wolfcamp and Spraberry formation was formed in response to variations in sea level and a transition from a glacial to an interglacial climate during the Early Permian. These fluctuations left behind alternating beds of mudstone and carbonate, interwoven with thin sandstone beds. Because the Wolfcamp and Spraberry formations are highly heterolithic, it …

Efficient Low Dimensional Representation Of Vector Gaussian Distributions, Md Mahmudul Hasan

LSU Doctoral Dissertations

This dissertation seeks to find optimal graphical tree model for low dimensional representation of vector Gaussian distributions. For a special case we assumed that the population co-variance matrix $\Sigma_x$ has an additional latent graphical constraint, namely, a latent star topology. We have found the Constrained Minimum Determinant Factor Analysis (CMDFA) and Constrained Minimum Trace Factor Analysis (CMTFA) decompositions of this special $\Sigma_x$ in connection with the operational meanings of the respective solutions. Characterizing the CMDFA solution of special $\Sigma_x$, according to the second interpretation of Wyner's common information, is equivalent to solving the source coding problem of finding the minimum …

Geo 100: Environmental Geology Oer Curation, Chealsye Bowley

Curated OER Collections

This OER curation is an annotated bibliography of prospective OER for the GVSU course GEO 100: Environmental Geology.

Ens 300: Principles Of Sustainability Oer Curation, Chealsye Bowley

Curated OER Collections

This OER curation is an annotated bibliography of prospective OER for the GVSU course ENS 300: Principles of Sustainability, assembled by request from the instructor.

Self-Supervised Video Object Segmentation Via Cutout Prediction And Tagging, Jyoti Kini, Fahad Shahbaz Khan, Salman Khan, Mubarak Shah

Computer Vision Faculty Publications

We propose a novel self-supervised Video Object Segmentation (VOS) approach that strives to achieve better object-background discriminability for accurate object segmentation. Distinct from previous self-supervised VOS methods, our approach is based on a discriminative learning loss formulation that takes into account both object and background information to ensure object-background discriminability, rather than using only object appearance. The discriminative learning loss comprises cutout-based reconstruction (cutout region represents part of a frame, whose pixels are replaced with some constant values) and tag prediction loss terms. The cutout-based reconstruction term utilizes a simple cutout scheme to learn the pixel-wise correspondence between the current …

Predicting Covid-19 Fake News, Nilanjana Nambiar

Honors Projects in Data Science

The aim of this project is to use a machine learning model to identify COVID-19 fake news on Twitter and perform additional analysis on the fake news tweets to distinguish any common trends. As misinformation is very common in the information found online, the purpose of the study is to see how machine learning can be used to discern what information can be classified as true versus what is false. Prior research regarding fake news detection, modeling, and analysis was conducted to familiarize on the current studies provided in predicting and analyzing COVID-19 fake news on Twitter. In this study, …

Cancel Culture: Who Or What Will Be Next?, Christine Trumper

Honors Projects in Data Science

This paper utilizes Data Science and Applied Statistic techniques, to perform an analytical dive into Cancel Culture as it is referenced and used on Twitter. The research focuses on analyzing how Cancel Culture has affected the sentiment of Twitter, specifically how it impacts prominent topics in the media that have occurred between February 2021 to September 2021. The development of a topic and sentiment analysis will be based on 1,302,844 Tweets collected using Twitter’s API. Cancel Culture became popularized on social media in the past few years and there is little concrete information regarding its process and the demographics it …