Physical Sciences and Mathematics | Open Access Articles

Using Gis And Geostatistics To Study Spatial Variation Of Soil Test Phosphorus In Grassland, Weijun Fu, H. Tunney, C. Zhang

IGC Proceedings (1993-2023)

No abstract provided.

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Height‐Weight Profiles Of Two Key Species To Assess Utilization Of Grasslands In Boroujen, Iran, Ataollah Ebrahimi

IGC Proceedings (1993-2023)

No abstract provided.

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Space Telescope And Optical Reverberation Mapping Project. Xii. Broad-Line Region Modeling Of Ngc 5548, P. R. Williams, A. Pancoast, T. Treu, B.J. Brewer, Vardha N. Bennert, Y. Zu

Physics

We present geometric and dynamical modeling of the broad line region (BLR) for the multi-wavelength reverberation mapping campaign focused on NGC 5548 in 2014. The data set includes photometric and spectroscopic monitoring in the optical and ultraviolet, covering the Hβ, C iv, and Lyα broad emission lines. We find an extended disk-like Hβ BLR with a mixture of near-circular and outflowing gas trajectories, while the C iv and Lyα BLRs are much less extended and resemble shell-like structures. There is clear radial structure in the BLR, with C iv and Lyα emission arising at …

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Optimal Control Of An Hiv Model With Gene Therapy And Latency Reversing Agents, Andrew B. Grant, Paul Hazelton

S.U.R.E Posters

In this project, we study the dynamics of HIV under gene therapy and latency reversing agents. For constant treatment controls, we establish global stability of the disease-free equilibrium and endemic equilibrium based on the value of the basic reproductive ratio. We then consider time dependent controls and formulate an associated optimal control problem that emphasizes reduction of the latent reservoir. Characterizations for the optimal control profiles are found using Pontryagin's Maximum Principle. We perform numerical simulations of the optimal control model using the fourth-order Runge-Kutta forward-backward sweep method. We conclude with findings that suggest a combination treatment of gene therapy …

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Escolar (Lepidocybium Flavobrunneum) Neurocranium, Meredith M. Pratt, Katerina D. Sawickij, David W. Kerstetter

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

Neurocranium prep of escolar Lepidocybium flavobrunneum obtained from longlining vessel.

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A User Study Of A Wearable System To Enhance Bystanders’ Facial Privacy, Alfredo J. Perez, Sherali Zeadally, Scott Griffith, Luis Y. Matos Garcia, Jaouad A. Mouloud

Information Science Faculty Publications

The privacy of users and information are becoming increasingly important with the growth and pervasive use of mobile devices such as wearables, mobile phones, drones, and Internet of Things (IoT) devices. Today many of these mobile devices are equipped with cameras which enable users to take pictures and record videos anytime they need to do so. In many such cases, bystanders’ privacy is not a concern, and as a result, audio and video of bystanders are often captured without their consent. We present results from a user study in which 21 participants were asked to use a wearable system called …

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A User Study Of A Wearable System To Enhance Bystanders’ Facial Privacy, Alfredo J. Perez, Sherali Zeadally, Scott Griffith, Luis Y. Matos Garcia, Jason A. Mouloud

Computer Science Faculty Publications

The privacy of users and information are becoming increasingly important with the growth and pervasive use of mobile devices such as wearables, mobile phones, drones, and Internet of Things (IoT) devices. Today many of these mobile devices are equipped with cameras which enable users to take pictures and record videos anytime they need to do so. In many such cases, bystanders’ privacy is not a concern, and as a result, audio and video of bystanders are often captured without their consent. We present results from a user study in which 21 participants were asked to use a wearable system called …

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Editorial Issue 2

SURE Journal: Science Undergraduate Research Experience Journal

Editorial

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Measurement Of Surface Subsidence And Ground Collapse Caused By Underground Mining In The Boleo Copper District, Mexico, Jong-Gwan Kim

Journal of Sustainable Mining

Subsidence and vertical movements in mines are a challenge in mining operations. To qualify as a controlled mine site, ground movements must be measured regularly during mining operations. Boleo Copper District mine was monitored and the movement during mining operations was measured from Oct. 31, 2018 to March 15, 2019. The evaluation of vertical and horizontal movement was determined in four locations in the mine areas M303, M303S, M303 C, and M305. The exploitation area, which measured approximately 80 x 90 m² with a height of 2.4 m, impacted the surface in the form of cracks. These cracks were …

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Recovery And Repurposing Of Thermal Resources In The Mining And Mineral Processing Industry, Shannon H. Mclean, Jeffrey Chenier, Sari Muinonen, Corey A. Laamanen, John A. Scott

Journal of Sustainable Mining

The consumption of energy contributes significantly to the overall cost of operations and the environmental impact of the mining and mineral processing industry. However, despite a few notable exceptions, most of the resulting waste heat produced is dissipated, without recovery, into the environment. There is also a lot of stored heat in mine water which can be tapped into long after a mine has closed. There is, therefore, significant opportunity to improve the industry's sustainability through increasing the amount of waste heat recovered and repurposed.

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Mineralogical Variations With The Mining Depth In The Congo Copperbelt: Technical And Environmental Challenges In The Hydrometallurgical Processing Of Copper And Cobalt Ores, Michel Shengo Lutandula, W. S. Kitobo, M. B. Kime, M. P. Mambwe, T. K. Nyembo

Journal of Sustainable Mining

For a long time in the Democratic Republic of Congo, the mining of ores for the production of copper cathodes and salts of cobalt was mostly conducted in the near-surface oxidized mineralization of the Congo Copperbelt. An important part of this mineralization is found in geological settings where copper and cobalt mainly exist as mixtures of oxides and sulfides. With the depletion of surface-rich minerals, mining is taking place at depths where sulfide minerals are prevalent. Using current technologies, the hydrometallurgical processing of ores with high levels of sulfide minerals results in poor metal recovery due to their retention in …

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Alternative Methodology To Determine Effective Coefficient Of Methane Diffusion In Coal, Henryk Koptoń

Journal of Sustainable Mining

The article presents the results of research in to the development of an alternative method of determining the effective coefficient of methane diffusion in coal, based on a mathematical model following Fick's second law. The research was conducted based on the recorded courses of methane sorption kinetics in coal samples obtained in laboratory conditions with the precise gravimetric sorption system IGA-001. The value of the coefficient was treated as an element tuning the model in such a way that the average relative error of the ex post was as small as possible. Model verification indicated the correctness of its assumptions. …

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In Search Of A Future For Mining: Participative Scenarios For Colombia, Santiago Arango-Aramburo, Ricardo Smith, Patricia Jaramillo, Yris Olaya, Adrian Saldarriaga, Oscar J. Restrepo, Yuly Arboleda, Carla Rua, Sebastian Bernal, Pablo E. Londono, Erik R. Larsen

Journal of Sustainable Mining

We describe and discuss the development of scenarios for the Colombian mining industry. The scenarios were developed with a large group of stakeholders from across the Colombian government, society, and commerce, all with interest in and/or affected by the future of the mining sector. The process resulted in the creation of three different scenarios for the Colombian mining sector to 2030. The article describes the participatory process used for involving the stakeholders, including the workshops and the mapping technique that was used. It also outlines the three scenarios and possible policies that should be considered by the Colombian government in …

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Ammonia-Ca-K Competitive Ion-Exchange On Zeolites In Mining Wastewater Treatment: Batch Regeneration And Column Performance, Roberto Martín Narbaitz, Zachary G. Chartrand, Majid Sartaj, Jason Downey

Journal of Sustainable Mining

This manuscript addresses the treatment explosives-impacted mining wastewaters (EIMWW) using ion-exchange to remove elevated levels of ammonia. Repeated batch loading-regeneration cycles were conducted for two commercially available zeolite media used in the treatment of ammonia-ladenEIMWW to establish the effects of competing ions and regeneration solution composition. The Northern Ontario EIMWW tested contained 3.87 meq/L total ammonia (TA) as well as 2.85 meq/L Kþ and 3.9 meq/L Ca2þ.The media studied were a natural clinoptilolite and a modified clinoptilolite (SIR-600). Five regenerant solutions with different NaCl and KCl concentrations were evaluated. The presence of potassium in the regenerant was found to hinder …

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Areas Of Distribution Of Cultivated And Wild‐Growing Forage Plants In Electronic "Atlas Of Economic Plants And Their Diseases, Pests And Weeds Of Russia And Neighboring Countries", N. I. Dzyubenko, E. A. Dzyubenko, L. L. Malyshev

IGC Proceedings (1993-2023)

No abstract provided.

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Factors Influencing The Spatial Distribution Of Beef Cattle On Mediterranean Rangeland, Amit Dolev, Eugene D. Ungar, Zalmen Henkin

IGC Proceedings (1993-2023)

No abstract provided.

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Germination Response Of Different Species To Allelopathy On Rangeland Plants, Mei Tian, Fujiang Hou

IGC Proceedings (1993-2023)

No abstract provided.

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Vertical Distribution Of Plant Parts And The Selectivity Of Harvesting Heights By Cattle In Miscanthus Sinensis, T. Takahashi, Shin-Ichiro Ogura, K. Sugawara

IGC Proceedings (1993-2023)

No abstract provided.

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Effects Of Cattle Grazing On Survival And Regrowth Of Miscanthus Sinensis Tillers, T. Takahashi, T. Shishido, Shin-Ichiro Ogura, S. Sato

IGC Proceedings (1993-2023)

No abstract provided.

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Solar Irradiance And Enso Affect Food Security In Lake Tanganyika, A Major African Inland Fishery, Michael M. Mcglue, S. J. Ivory, J. R. Stone, A. S. Cohen, T. M. Kamulali, J. C. Latimer, M. A. Brannon, I. A. Kimirei, M. J. Soreghan

Earth and Environmental Sciences Faculty Publications

Food security in a warming world is a grave concern for rapidly growing impoverished populations. Low-latitude inland fisheries provide protein for millions of rural poor, yet the impacts of high-frequency climate oscillations on these aquatic ecosystems are unknown. Here, we present a sub-annual-to-annual resolution paleolimnological reconstruction of upwelling, productivity, and algal composition at Lake Tanganyika, one of Africa's largest landlocked fisheries. The data reveal increases in diatom production at centennial-scale solar irradiance maxima, and interannual variability in upwelling linked to La Niña. Our study shows that interactions between global climatic controls and El Niño-Southern Oscillation teleconnections exert profound influences on …

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Developing A Model Of Graduate Teaching Assistant Teacher Efficacy: How Do High And Low Teacher Efficacy Teaching Assistants Compare?, Cody R. Smith, Cesar Delgado

School of Natural Resources: Faculty Publications

Graduate teaching assistants (TAs) are often responsible for teaching introductory courses to undergraduate science, technology, engineering, and mathematics students. The TAs are usually novices at teaching, and an important factor in their resilience and persistence in the face of inevitable challenges is self-efficacy. Little is known about what affects TA teacher efficacy or whether and how high- and low-efficacy TAs differ in their development as teachers. Bridging these gaps in the literature will inform best practices in developing and implementing professional development (PD) for TAs. Using a mixed-methods sequential exploratory research design, this study found differences in high- and low-efficacy …

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A Nonlinear Multi-Population Behavioral Model To Assess The Roles Of Education Campaigns, Random Supply Of Aids, And Delayed Art Treatment In Hiv/Aids Epidemics, Divine Wanduku

Department of Mathematical Sciences Faculty Publications

The successful reduction in prevalence rates of HIV in many countries is attributed to control measures such as information and education campaigns (IEC), antiretroviral therapy (ART), and national, multinational and multilateral support providing offcial developmental assistance (ODAs) to combat HIV. However, control of HIV epidemics can be interrupted by limited random supply of ODAs, high poverty rates and low living standards. This study presents a stochastic HIV/AIDS model with treatment assessing the roles of IEC, the supply of ODAs and early treatment in HIV epidemics. The supply of ODAs is assessed via the availability of medical and financial resources leading …

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Optimization Of Cation Exchange Chromatography Purification Of A Small Peptide: An Industrial And Practical Approach, Jamin Willoughby

Honors Theses

Ion exchange chromatography (IEX) is a common chemical separation technique that is used to separate ionizable target molecules from a liquid mixture mobile phase by adsorption of the molecule to a stationary phase. In chromatography, the stationary phase is a porous solid that the target molecule and mobile phase flows through, and is commonly referred to as the resin. Resins are commonly packed into hollow cylindrical columns. The mobile phase is the liquid solvent which flows through the column containing the stationary phase. The target molecule will have an affinity for the resin and adsorb to it, while impurities in …

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"Odu Presents" Speaker Will Combine Science And Christianity When Discussing Climate Change, Joe Garvey

News Items

No abstract provided.

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Exactness Of Swkb For Shape Invariant Potentials, Asim Gangopadhyaya, Jeffry V. Mallow, Emeritus, Constantin Rasinariu, Jonathan Bougie

Physics: Faculty Publications and Other Works

The supersymmetry-based semiclassical method (SWKB) is known to produce exact spectra for conventional shape invariant potentials. In this paper we prove that this exactness follows from their additive shape invariance.

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An Examination Of Enhanced Atmospheric Methane Detection Methods For Predicting Performance Of A Novel Multiband Uncooled Radiometer Imager, Cody M. Webber, John P. Kerekes

Articles

To evaluate the potential for a new uncooled infrared radiometer imager to detect enhanced atmospheric levels of methane, three different analysis methods were examined. A single-pixel brightness temperature to noise-equivalent delta temperature (NEdT) comparison study performed using data simulated from MODTRAN6 revealed that a single thermal band centered on the 7.68 µm methane feature leads to a detectable brightness temperature difference exceeding the sensor noise level for a plume of about 17 ppm at ambient atmospheric temperature compared to an ambient plume with no enhanced methane present. Application of a normalized differential methane index method, a novel approach for methane …

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Period Estimation And Noise In A Neutrally Stable Stochastic Oscillator, Kevin R. Sanft, Ben F. M. Intoy

Spora: A Journal of Biomathematics

The periods of the orbits for the well-mixed cyclic three-species Lotka-Volterra model far away from the fixed point are studied. For finite system sizes, a discrete stochastic approach is employed and periods are found via wavelet analysis. As the system size is increased, a hierarchy of approximations ranging from Poisson noise to Gaussian noise to deterministic models are utilized. Based on the deterministic equations, a mathematical relationship between a conserved quantity of the model and the period of the population oscillations is found. Exploiting this property we then study the deterministic conserved quantity and period noise in finite size systems.

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Bio-Ethics From Image Of God And Soul, Doug Kennard

Proceedings of the International Conference on Creationism

Faced with the near unanimity of biblical anthropology among biblical theology (Botterweck & Ringgren, 1974–2006; Brown, 1975; Harris, Archer, & Waltke, 1980; Kittle & Friedrich, 1964–1976; VanGemeren, 1997), I propose an analysis of the biblical words and concepts, focusing on: (1) “image of God” and (2) “soul.” This approach results in a functionalism, which I call a multi-faceted unity. I propose to extend these biblical theology categories into the field of bio-ethics for implications. This approach is in contrast to some Christian bio-ethicists who start from the field of philosophy or biology and tack some devotional elements of the Bible …

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A Periglacial Landsystem Analysis In The Canadian High Arctic: A Tool For Planetary Geomorphology, Chimira Nicole Andres

Electronic Thesis and Dissertation Repository

Permafrost underlies 50% of Canada’s terrain and underlies 24% of the Earth’s total land area. It is a major driving force in the generation and evolution of patterned ground landforms such as polygons, stone circles, mud boils, and stripes, etc. that are seen on both the surface of the Earth and Mars, specifically in periglacial domains. The distribution of subsurface ice in these landforms (i.e. polygonal terrain) on Earth is a key constraint on past climate and process-form relationships in high arctic and periglacial regions. These landforms also have the potential of storing ice in the subsurface meaning that the …

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The Life History And Population Dynamics Of Southern Flounder, Kenneth A. Erickson

LSU Master's Theses

Southern Flounder, Paralichthys lethostigma, are a coastal, estuarine-dependent flatfish species that inhabits the Southeastern US Atlantic Ocean and Gulf of Mexico. Throughout their range, Southern Flounder are exploited by both commercial and recreational fisheries. Recently, numerous sources have expressed concerns about Southern Flounder populations, with stock assessments indicating declines in spawning stock biomass and recruitment. To estimate life history traits needed for informed management, such as age, growth, and maturity, I collected 327 Southern Flounder from Louisiana and obtained 14,184 historical records from the Louisiana Department of Wildlife and Fisheries. Using a von Bertalanffy growth equation in a Bayesian …

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Full-Text Articles in Physical Sciences and Mathematics

Using Gis And Geostatistics To Study Spatial Variation Of Soil Test Phosphorus In Grassland, Weijun Fu, H. Tunney, C. Zhang

IGC Proceedings (1993-2023)

Height‐Weight Profiles Of Two Key Species To Assess Utilization Of Grasslands In Boroujen, Iran, Ataollah Ebrahimi

IGC Proceedings (1993-2023)

Space Telescope And Optical Reverberation Mapping Project. Xii. Broad-Line Region Modeling Of Ngc 5548, P. R. Williams, A. Pancoast, T. Treu, B.J. Brewer, Vardha N. Bennert, Y. Zu

Physics

Optimal Control Of An Hiv Model With Gene Therapy And Latency Reversing Agents, Andrew B. Grant, Paul Hazelton

S.U.R.E Posters

Escolar (Lepidocybium Flavobrunneum) Neurocranium, Meredith M. Pratt, Katerina D. Sawickij, David W. Kerstetter

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

A User Study Of A Wearable System To Enhance Bystanders’ Facial Privacy, Alfredo J. Perez, Sherali Zeadally, Scott Griffith, Luis Y. Matos Garcia, Jaouad A. Mouloud

Information Science Faculty Publications

A User Study Of A Wearable System To Enhance Bystanders’ Facial Privacy, Alfredo J. Perez, Sherali Zeadally, Scott Griffith, Luis Y. Matos Garcia, Jason A. Mouloud

Computer Science Faculty Publications

Editorial Issue 2

SURE Journal: Science Undergraduate Research Experience Journal

Measurement Of Surface Subsidence And Ground Collapse Caused By Underground Mining In The Boleo Copper District, Mexico, Jong-Gwan Kim

Journal of Sustainable Mining

Recovery And Repurposing Of Thermal Resources In The Mining And Mineral Processing Industry, Shannon H. Mclean, Jeffrey Chenier, Sari Muinonen, Corey A. Laamanen, John A. Scott

Journal of Sustainable Mining

Mineralogical Variations With The Mining Depth In The Congo Copperbelt: Technical And Environmental Challenges In The Hydrometallurgical Processing Of Copper And Cobalt Ores, Michel Shengo Lutandula, W. S. Kitobo, M. B. Kime, M. P. Mambwe, T. K. Nyembo

Journal of Sustainable Mining

Alternative Methodology To Determine Effective Coefficient Of Methane Diffusion In Coal, Henryk Koptoń

Journal of Sustainable Mining

In Search Of A Future For Mining: Participative Scenarios For Colombia, Santiago Arango-Aramburo, Ricardo Smith, Patricia Jaramillo, Yris Olaya, Adrian Saldarriaga, Oscar J. Restrepo, Yuly Arboleda, Carla Rua, Sebastian Bernal, Pablo E. Londono, Erik R. Larsen

Journal of Sustainable Mining

Ammonia-Ca-K Competitive Ion-Exchange On Zeolites In Mining Wastewater Treatment: Batch Regeneration And Column Performance, Roberto Martín Narbaitz, Zachary G. Chartrand, Majid Sartaj, Jason Downey

Journal of Sustainable Mining

Areas Of Distribution Of Cultivated And Wild‐Growing Forage Plants In Electronic "Atlas Of Economic Plants And Their Diseases, Pests And Weeds Of Russia And Neighboring Countries", N. I. Dzyubenko, E. A. Dzyubenko, L. L. Malyshev

IGC Proceedings (1993-2023)

Factors Influencing The Spatial Distribution Of Beef Cattle On Mediterranean Rangeland, Amit Dolev, Eugene D. Ungar, Zalmen Henkin

IGC Proceedings (1993-2023)

Germination Response Of Different Species To Allelopathy On Rangeland Plants, Mei Tian, Fujiang Hou

IGC Proceedings (1993-2023)

Vertical Distribution Of Plant Parts And The Selectivity Of Harvesting Heights By Cattle In Miscanthus Sinensis, T. Takahashi, Shin-Ichiro Ogura, K. Sugawara

IGC Proceedings (1993-2023)

Effects Of Cattle Grazing On Survival And Regrowth Of Miscanthus Sinensis Tillers, T. Takahashi, T. Shishido, Shin-Ichiro Ogura, S. Sato

IGC Proceedings (1993-2023)

Solar Irradiance And Enso Affect Food Security In Lake Tanganyika, A Major African Inland Fishery, Michael M. Mcglue, S. J. Ivory, J. R. Stone, A. S. Cohen, T. M. Kamulali, J. C. Latimer, M. A. Brannon, I. A. Kimirei, M. J. Soreghan

Earth and Environmental Sciences Faculty Publications

Developing A Model Of Graduate Teaching Assistant Teacher Efficacy: How Do High And Low Teacher Efficacy Teaching Assistants Compare?, Cody R. Smith, Cesar Delgado

School of Natural Resources: Faculty Publications

A Nonlinear Multi-Population Behavioral Model To Assess The Roles Of Education Campaigns, Random Supply Of Aids, And Delayed Art Treatment In Hiv/Aids Epidemics, Divine Wanduku

Department of Mathematical Sciences Faculty Publications

Optimization Of Cation Exchange Chromatography Purification Of A Small Peptide: An Industrial And Practical Approach, Jamin Willoughby

Honors Theses

"Odu Presents" Speaker Will Combine Science And Christianity When Discussing Climate Change, Joe Garvey

News Items

Exactness Of Swkb For Shape Invariant Potentials, Asim Gangopadhyaya, Jeffry V. Mallow, Emeritus, Constantin Rasinariu, Jonathan Bougie

Physics: Faculty Publications and Other Works

An Examination Of Enhanced Atmospheric Methane Detection Methods For Predicting Performance Of A Novel Multiband Uncooled Radiometer Imager, Cody M. Webber, John P. Kerekes

Articles

Period Estimation And Noise In A Neutrally Stable Stochastic Oscillator, Kevin R. Sanft, Ben F. M. Intoy

Spora: A Journal of Biomathematics

Bio-Ethics From Image Of God And Soul, Doug Kennard

Proceedings of the International Conference on Creationism

A Periglacial Landsystem Analysis In The Canadian High Arctic: A Tool For Planetary Geomorphology, Chimira Nicole Andres

Electronic Thesis and Dissertation Repository

The Life History And Population Dynamics Of Southern Flounder, Kenneth A. Erickson

LSU Master's Theses