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Articles 44041 - 44070 of 294413

Full-Text Articles in Physical Sciences and Mathematics

Cybersecurity Workforce Development In Nigeria: Transforming The Cybercrime Gangs Into Cybersecurity Specialists, Olohi Favor Anteyi Apr 2023

Cybersecurity Workforce Development In Nigeria: Transforming The Cybercrime Gangs Into Cybersecurity Specialists, Olohi Favor Anteyi

Cybersecurity Undergraduate Research Showcase

This paper addresses the issue of cybercrime in Nigeria and the possibility of creating a cybersecurity workforce development program for cyber criminals to develop their skills for the cybersecurity profession, which may facilitate Nigeria’s economic development.

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Organic Matter Quality Influences Aerobic And Anaerobic Respiration Rates In Peatland Soils, Rachel Shaw, Lauren Bryan, Madison Smith, Christian Lundy, Alexis Koehl, Grace Behrens, Mackenzie Dole, Madeleine O'Donnell Apr 2023

Organic Matter Quality Influences Aerobic And Anaerobic Respiration Rates In Peatland Soils, Rachel Shaw, Lauren Bryan, Madison Smith, Christian Lundy, Alexis Koehl, Grace Behrens, Mackenzie Dole, Madeleine O'Donnell

22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)

The vulnerability of peatland carbon reservoirs to decomposition in a warming climate remains a key uncertainty in Earth System Models. This will be determined in part by the "quality" of the peatland organic matter, i.e. the ease by which it is decomposed by the microbial community. We developed an index of organic matter quality based on the biochemical composition of the peat. The index uses a principal components analysis of proxies based on the carbohydrate composition, hydrolysable amino acids, C:N, pH, and nutrient availability in the peat porewater. The index was compared with measurements of aerobic and anaerobic respiration rates …

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Patient-Handling Tasks And Posture Classification With Machine Learning, Haniah Kring, Annie Ngoc Tran, Elsa Brillinger, Aine Snoap, Noah Bradford Apr 2023

Patient-Handling Tasks And Posture Classification With Machine Learning, Haniah Kring, Annie Ngoc Tran, Elsa Brillinger, Aine Snoap, Noah Bradford

22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)

A 2016 survey indicated that 39% of registered nursing respondents had reported musculoskeletal injuries after two years of regularly performing patient-handling tasks. Optical marker systems (considered the gold standard) can be used in laboratory settings to explore mechanisms of injury during patient-handling tasks, but deploying inertial measuring units (IMUs) in biomechanics allows data collection in both laboratory and clinical environments. IMU-based capture systems are also preferable to optical marker systems because they avoid marker occlusion during more complicated patient-handling tasks. The aims of our study are (1) to identify machine learning models that can accurately predict patient-handling tasks performed and …

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Calibrating The Faraday Cup For Ion Beams Using Rutherford Backscattering Spectroscopy, Joseph Fogt, Nolan Miles, Megan Haeussler, Hope Weeda Apr 2023

Calibrating The Faraday Cup For Ion Beams Using Rutherford Backscattering Spectroscopy, Joseph Fogt, Nolan Miles, Megan Haeussler, Hope Weeda

22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)

Particle accelerators are useful pieces of technology for a variety of experiments, from testing for contaminants in the water supply to testing the durability of materials exposed to radiation. In order to measure the amount of radiation being delivered by the accelerator’s beam, a Faraday cup is used. This tool can measure the amount of ions impacting a surface by measuring the current generated by the incident ions; however, they often overestimate current due to the emission of secondary electrons. This is an inherent property of the Faraday cup, but we still want an accurate measurement of the beam current. …

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Temperature Sensitivity Of Nitrogen Mineralization In Peat From A Southwestern Michigan Bog, Madison Smith, Lauren Bryan, Rachel Shaw, Mackenzie Dole, Madeleine O'Donnell Apr 2023

Temperature Sensitivity Of Nitrogen Mineralization In Peat From A Southwestern Michigan Bog, Madison Smith, Lauren Bryan, Rachel Shaw, Mackenzie Dole, Madeleine O'Donnell

22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)

In this study, we measured inorganic nitrogen (nitrate and ammonium) released from peat cores from Miner Lake bog at two temperatures to analyze the impact of climate warming on the peatland nitrogen cycle. We hypothesized a higher nitrogen release in samples incubated at warmer temperatures. Furthermore, previous research indicates shallow peat decomposes faster than deeper peat. Therefore, we hypothesized faster nitrogen mineralization in shallow samples. We collected peat cores from two locations from Miner Lake Bog in Allegan County, Michigan: a plot in the center of the bog and a sedge meadow site near the edge. Two samples for each …

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Identity Development And Empathy Among Pre-Health Students: A Longitudinal Study Employing Latent Class Analysis, Bergen Johnson, Gabe Deyoung, Matthew Stafford Apr 2023

Identity Development And Empathy Among Pre-Health Students: A Longitudinal Study Employing Latent Class Analysis, Bergen Johnson, Gabe Deyoung, Matthew Stafford

22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)

Pre-health students endure rigorous education to prepare for treating patients, but potentially not for every aspect of patient care. Beyond medical knowledge, successful patient interactions often include moral decision making and the possession of traits such as empathy. There is little research on early physician and nurse development, with a substantial gap at the undergraduate level. This is significant as the trend toward a decrease in empathy could begin sooner. We explore this using latent class analysis to categorize participants based upon survey response patterns regarding numerous indicators, the most dominant class indicators being religion and political views.

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Selective Preservation Of Structural Carbohydrates During Peat Formation, Lauren Bryan, Rachel Shaw, Madison Smith, Erik Schoonover, Trevor Hile, Christian Lundy, Alexis Koehl, Grace Behrens, Madeleine O'Donnell, Mackenzie Dole Apr 2023

Selective Preservation Of Structural Carbohydrates During Peat Formation, Lauren Bryan, Rachel Shaw, Madison Smith, Erik Schoonover, Trevor Hile, Christian Lundy, Alexis Koehl, Grace Behrens, Madeleine O'Donnell, Mackenzie Dole

22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)

The structural carbohydrate "sphagnan" has been hypothesized to play a role in slowing the degradation of Sphagnum moss, and therefore contribute to carbon sequestration in peatlands. Sphagnan is composed of a galacturonic acid and rhamnose backbone. However, it is currently unclear whether sphagnan persists beyond early-litter degradation and plays a role in the long-term preservation of organic matter in peatlands. In this study, we analyzed hydrolyzable neutral sugars, using rhamnose as a proxy for sphagnan content, and tracked the concentration of rhamnose present within moss before and after a 270-day period of decomposition, as well as the concentration of rhamnose …

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Classification Of Land Cover On Sand Dunes, Heleyna Tucker, Micah Sterk Apr 2023

Classification Of Land Cover On Sand Dunes, Heleyna Tucker, Micah Sterk

22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)

As members of the Hope College Coastal Research Group, we have studied the mechanisms for and effects of sand transport. In particular, we have worked to model vegetation coverage in West Michigan sand dune complexes in order to better understand how sand movement and resident vegetation affect one another. We use aerial drone imagery to develop machine learning algorithms for creating ground cover classification mappings in an automated way. Our team collected drone imagery ranging from high-resolution, low-altitude photographs to high-altitude stitched and rectified orthomosaics. We developed accurate ground cover classification methods for the low-altitude imagery and then explored ways …

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Designing Resilient Agents Using Grammatical Evolution, Behavior Trees, And Finite Linear Temporal Logic, Aadesh Neupane Apr 2023

Designing Resilient Agents Using Grammatical Evolution, Behavior Trees, And Finite Linear Temporal Logic, Aadesh Neupane

Theses and Dissertations

Resilience is essential for long-term autonomous agents. Swarm behaviors seen in bees, ants, birds, fish, and others are interesting because they resiliently perform complex coordinated tasks like foraging, nest-selection, flocking and escaping predators without centralized control or coordination. Conventionally, mimicking swarm behaviors with robots requires researchers to study actual behaviors, derive mathematical models, and implement these models as state machines. Since the conventional approach is time-consuming and cumbersome, this dissertation uses a grammatical evolution algorithm with Behavior Trees (BTs) to evolve behaviors that are resilient to different perturbations for foraging and nest maintenance tasks. The modular, reactive, and readable properties …

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Unveiling The Dark Web And The Impact Of Revil's Cyberattacks, Tanya Sasnouskaya Apr 2023

Unveiling The Dark Web And The Impact Of Revil's Cyberattacks, Tanya Sasnouskaya

Cybersecurity Undergraduate Research Showcase

The United States Navy originally created the Dark Web for intelligence purposes, but it was later promoted by Western countries as a tool for safeguarding privacy and anonymity. Currently, the Dark Web serves as a platform for deliberate information leaks by nations that want to keep certain information out of the mainstream media. This paper provides an overview of the dark web and the browser used to access it. It covers the layers of the internet and highlights REvil ransomware and some of its technical details. By understanding these risks, users can take appropriate preventive measures to protect themselves from …

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Draft Final 2023 Residential Metals Abatement Program (Rmap) Park Soil Sampling Field Sampling Plan (Fsp) Submittal #7 [Gold Hill Lutheran Church, Peoples Park, Sioux Park, Charlie Judd Park, Emma Park, Mandan Park, And Walkerville Park (Daly And Dunn)], Pioneer Technical Services, Inc. Apr 2023

Draft Final 2023 Residential Metals Abatement Program (Rmap) Park Soil Sampling Field Sampling Plan (Fsp) Submittal #7 [Gold Hill Lutheran Church, Peoples Park, Sioux Park, Charlie Judd Park, Emma Park, Mandan Park, And Walkerville Park (Daly And Dunn)], Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

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Draft - Residential Metals Abatement Program Investigation Summary Report (Non-Residential Parcels – Indoor Dust) Emerson Elementary School, Environmental Resource Management (Erm) Apr 2023

Draft - Residential Metals Abatement Program Investigation Summary Report (Non-Residential Parcels – Indoor Dust) Emerson Elementary School, Environmental Resource Management (Erm)

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

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Area Activity, Admin Stem For Success Apr 2023

Area Activity, Admin Stem For Success

STEM for Success Showcase

Lesson plan to teach students about area including an activity plan, activity description, activity video, and additional activity materials

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Physical And Chemical Changes Lesson Plan, Admin Stem For Success Apr 2023

Physical And Chemical Changes Lesson Plan, Admin Stem For Success

STEM for Success Showcase

Lesson plan and video for an activity on the difference between physical and chemical changes.

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The Science Of Baking Bread, Admin Stem For Success Apr 2023

The Science Of Baking Bread, Admin Stem For Success

STEM for Success Showcase

Activity plan to teach biology and chemistry using a lesson on the baking of bread.

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Storm In A Glass Lesson Plan, Admin Stem For Success Apr 2023

Storm In A Glass Lesson Plan, Admin Stem For Success

STEM for Success Showcase

Lesson Plan and Video Demonstration for the "Storm in a Glass" Activity, which teaches students about precipitation.

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Experimental Study: Deep Learning-Based Fall Monitoring Among Older Adults With Skin-Wearable Electronics, Yongkuk Lee, Suresh Pokharel, Asra Al Muslim, Dukka Kc, Kyoung Hag Lee, Woon Hong Yeo Apr 2023

Experimental Study: Deep Learning-Based Fall Monitoring Among Older Adults With Skin-Wearable Electronics, Yongkuk Lee, Suresh Pokharel, Asra Al Muslim, Dukka Kc, Kyoung Hag Lee, Woon Hong Yeo

Michigan Tech Publications, Part 1

Older adults are more vulnerable to falling due to normal changes due to aging, and their falls are a serious medical risk with high healthcare and societal costs. However, there is a lack of automatic fall detection systems for older adults. This paper reports (1) a wireless, flexible, skin-wearable electronic device for both accurate motion sensing and user comfort, and (2) a deep learning-based classification algorithm for reliable fall detection of older adults. The cost-effective skin-wearable motion monitoring device is designed and fabricated using thin copper films. It includes a six-axis motion sensor and is directly laminated on the skin …

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Mixing Regimes In A Cluster Of Seven Maar Lakes In Tropical Monsoon Asia, Milette U. Mendoza, Jaydan I. Aguilar, Karol Sophia Agape R. Padilla, Rey Donne S. Papa, Noboru Okuda Apr 2023

Mixing Regimes In A Cluster Of Seven Maar Lakes In Tropical Monsoon Asia, Milette U. Mendoza, Jaydan I. Aguilar, Karol Sophia Agape R. Padilla, Rey Donne S. Papa, Noboru Okuda

Environmental Science Faculty Publications

The 7 maar lakes of San Pablo are a cluster of small volcanic lakes on Luzon Island; Philippines. These lakes; which are heavily utilized for aquaculture and ecotourism; usually experience fish kills that coincide with the northeast monsoon (NEM). This study explores limnophysical processes; particularly mixing regimes; in the lakes in relation to prevailing monsoons. We monitored monthly vertical and seasonal profiles of water temperature; salinity; conductivity; and dissolved oxygen from October 2016 to December 2018. Three types of mixing regimes were observed among the lakes; which have similar surface areas but different depths: polymixis in the shallowest; warm monomixis …

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Liouville Soliton Surfaces Obtained Using Darboux Transformations, S. C. Mancas, K. R. Acharya Apr 2023

Liouville Soliton Surfaces Obtained Using Darboux Transformations, S. C. Mancas, K. R. Acharya

Publications

We construct parametric Liouville surfaces corresponding to parametric soliton solutions of the Liouville equation and Darboux-transformed counterparts. We also use a modified variation of parameters method together with the elliptic functions method to obtain the traveling wave solutions to Liouville equation and express the centroaffine invariant in terms of the soliton Hamiltonian.

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Removal Of Radionuclides Using Capacitive Deionization, Yusik Won Apr 2023

Removal Of Radionuclides Using Capacitive Deionization, Yusik Won

LSU Doctoral Dissertations

Severe nuclear accidents, including the Fukushima nuclear power plant accident, can lead to the discharge of large amounts of radionuclides into aquatic environments. Some radionuclides such as 137Cs and 90Sr have long half-lives and can remain in the environment for a long period of time. These radionuclides can be detrimental to humans and the environments because they can cause human and environmental exposure to ionizing radiation and because they can be bioaccumulated and biomagnified. Therefore, in case of a severe accident and a radioactive spill, it is important to quickly clean up and treat radioactively contaminated water to …

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Information Horizon Of Solar Active Regions, Jay R. Johnson, Simon Wing, Carson O'Ffill, Bishwa Neupane Apr 2023

Information Horizon Of Solar Active Regions, Jay R. Johnson, Simon Wing, Carson O'Ffill, Bishwa Neupane

Faculty Publications

Information theory is used to characterize the solar active region periodicities and memories from the Carrington map images 1974–2021. The active regions typically evolve and move from one map to the next. In order to track these active region structures in sequences of images, an innovative method based on information theory is developed. Image entropy provides a measure of the organization of structures in the images. The entropy can also be used as a filter to identify structures and partition the active regions, which are then registered for each image. The partitions are used to compute the mutual information and …

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Soil Nutrient And Invertase-Producing Bacteria Relation Impact On Cilembu Sweet Potato (Ipomoea Batatas L.) Growth: A Study Based On Upland And Wetland Cultivation In Cilembu Village Sumedang District, Eso Solihin, Syaiful Anwar, Dwi Andreas Santoso, Budi Nugroho, Purwono, Rija Sudirja, Haris Maulana, Nadia Nuraniya Kamaluddin, Agung Karuniawan Apr 2023

Soil Nutrient And Invertase-Producing Bacteria Relation Impact On Cilembu Sweet Potato (Ipomoea Batatas L.) Growth: A Study Based On Upland And Wetland Cultivation In Cilembu Village Sumedang District, Eso Solihin, Syaiful Anwar, Dwi Andreas Santoso, Budi Nugroho, Purwono, Rija Sudirja, Haris Maulana, Nadia Nuraniya Kamaluddin, Agung Karuniawan

Jurnal Kultivasi

Environment is one important factors that must be considered in supporting sweet potato productivity. Environmental factors can be biotic and abiotic, including the availability of nutrients and microbes in the soil. This study aimed to identify the nutrient content of the soil in paddy fields and dry fields, identify the total invertase microorganisms in paddy fields and dry fields, and identify the relationship between soil nutrients and microorganisms during the growth of Cilembu sweet potato in dry and paddy fields agroecosystems. This research was conducted on dry fields and paddy fields in Cilembu Village, Sumedang Regency. The experimental design used …

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Dynamical Formation Of Two-Fold Fragmented Many-Body State Induced By An Impurity In A Double-Well, Jie Chen, Simeon I. Mistakidis, Peter Schmelcher Apr 2023

Dynamical Formation Of Two-Fold Fragmented Many-Body State Induced By An Impurity In A Double-Well, Jie Chen, Simeon I. Mistakidis, Peter Schmelcher

Physics Faculty Research & Creative Works

We Unravel The Correlated Quantum Quench Dynamics Of A Single Impurity Immersed In A Bosonic Environment Confined In An One-Dimensional Double-Well Potential. A Particular Emphasis Is Placed On The Structure Of The Time-Evolved Many-Body (MB) Wave Function By Relying On A Schmidt Decomposition Whose Coefficients Directly Quantify The Number Of Configurations That Are Macroscopically Populated. For A Non-Interacting Bosonic Bath And Weak Postquench Impurity-Bath Interactions, We Observe The Dynamical Formation Of A Two-Fold Fragmented MB State Which Is Related To Intra-Band Excitation Processes Of The Impurity And Manifests As A Two-Body Phase Separation (Clustering) Between The Two Species For Repulsive …

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Effects Of Autoionizing Resonances On Wave-Packet Dynamics Studied By Time-Resolved Photoelectron Spectroscopy, Pengju Zhang, Van Hung Hoang, Chuncheng Wang, Tran Trung Luu, Vít Svoboda, Anh-Thu Le, Hans Jakob Wörner Apr 2023

Effects Of Autoionizing Resonances On Wave-Packet Dynamics Studied By Time-Resolved Photoelectron Spectroscopy, Pengju Zhang, Van Hung Hoang, Chuncheng Wang, Tran Trung Luu, Vít Svoboda, Anh-Thu Le, Hans Jakob Wörner

Physics Faculty Research & Creative Works

We Report a Combined Experimental and Theoretical Study on the Effect of Autoionizing Resonances in Time-Resolved Photoelectron Spectroscopy. the Coherent Excitation of N2 by ∼14.15 EV Extreme-Ultraviolet Photons Prepares a Superposition of Three Dominant Adjacent Vibrational Levels (V′=14-16) in the Valence B′ ςu+1 State, Which Are Probed by the Absorption of Two or Three Near-Infrared Photons (800 Nm). the Superposition Manifests itself as Coherent Oscillations in the Measured Photoelectron Spectra. a Quantum-Mechanical Simulation Confirms that Two Autoionizing Rydberg States Converging to the Excited a Π2u and B ςu+2 N2+ Cores Are Accessed by the Resonant Absorption of …

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Residential Metals Abatement Program Investigation Summary Report (Non-Residential Parcels – Indoor Dust) Emerson Elementary School, Environmental Resource Management (Erm) Apr 2023

Residential Metals Abatement Program Investigation Summary Report (Non-Residential Parcels – Indoor Dust) Emerson Elementary School, Environmental Resource Management (Erm)

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

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A Predator-Prey Biological Model With Combined Birth Rates, Self-Limitation And Competition Terms, Joon Hyuk Kang, Lucinda Ford Apr 2023

A Predator-Prey Biological Model With Combined Birth Rates, Self-Limitation And Competition Terms, Joon Hyuk Kang, Lucinda Ford

Faculty Publications

The purpose of this paper is to give sufficient conditions for the existence and uniqueness of positive solutions to a rather general type of elliptic system of the Dirichlet problem on a bounded domain Ω in Rn. Also considered are the effects of perturbations on the coexistence state and uniqueness. The techniques used in this paper are super-sub solutions method, eigenvalues of operators, maximum principles, spectrum estimates, inverse function theory, and general elliptic theory. The arguments also rely on some detailed properties for the solution of logistic equations. These results yield an algebraically computable criterion for the positive …

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Glass: The Material That Defines Us, Madisyn Rex Apr 2023

Glass: The Material That Defines Us, Madisyn Rex

Honors Projects

This Honors Project is an exploration of the intersections between glass science, geology, glass art, and my own personal experience with glass.

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Eben Cabs (Mobility As A Service), Asha Kumari Apr 2023

Eben Cabs (Mobility As A Service), Asha Kumari

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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In-Vitro Hypoglycemic Activity Of Tupistra Clarkei Flower Extract, Abhishek Byahut, Arundhati Bag, Chamma Gupta Apr 2023

In-Vitro Hypoglycemic Activity Of Tupistra Clarkei Flower Extract, Abhishek Byahut, Arundhati Bag, Chamma Gupta

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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Bacteriostatic Effect On Mdr Pathogen, Using Marine Extremophilic Bacillus Sp. Via Extremophilic Gene Alteration, Kanchan Soni, Ashima Bagaria Apr 2023

Bacteriostatic Effect On Mdr Pathogen, Using Marine Extremophilic Bacillus Sp. Via Extremophilic Gene Alteration, Kanchan Soni, Ashima Bagaria

Manipal Research Colloquium - 2023

Manipal Research Colloquium- 2023 aims to bring students, scholars, and scientists to this forum where discussion on a diverse range of topics from various streams (Health Sciences, Technical Sciences, Basic & Applied Sciences, Humanities & Social Sciences, and Management Sciences) will be taking place.

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