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Modeling and Analysis of Electric Signal in Neurons
No full textNeurons in humans and other species transmit information by sending electric signals via axons. This process relies on the generation and propagation of action potentials—rapid changes in the membrane potential of the axon. Understanding the mechanisms of action potentials, including how they are generated and influenced by the axon geometry and material parameters, is crucial for gaining insight into neurological diseases such as Alzheimer’s and Multiple Sclerosis (diseases highly correlated to demyelination). In this work, we review and summarize mathematical models for signal transmission–including the classical Hodgkin-Huxley model, the Single Cable (SC) model, and the Double Cable (DC) model. We adopt the finite-difference method to numerically solve these models. We focus on the differences between the SC and DC models based on existing parameters for a rat axon, e.g., the conduction velocity, the voltage profiles, the signal decay etc. We also apply the model with modified parameters based on semiconductor nanomembrane tubes, used to resemble a natural myelin sheath. Finally, we provide a parameter sensitivity analysis of other key parameters (particularly the myelin capacitance and paranodal resistance) that affect the conduction velocity and voltage dynamics of myelinated axons
Building Financial Resilience in Utah: The Outcomes of the Empowering Financial Wellness Program
Get PDFThe Utah State University Extension Empowering Financial Wellness (EFW) program demonstrated improvement in Utahns’ financial behaviors and understanding while creating a positive impact on participants’ quality of life and financial confidence. Through research-based education and ongoing evaluation, EFW continues to deliver measurable, meaningful outcomes to improve the lives of Utahns
Deploying and Operating the 25-Satellite Kinéis Constellation, Challenges and Lessons Learned
Get PDFThis Kinéis constellation is made of 25 30kg-class satellites, equipped with electric propulsion. The missions are dedicated to IoT (Internet of Things) connectivity and to AIS (Automatic Identification System) monitoring. The satellites were launched by batches of 5, the first took place in June 2024, the last one in March 2025.
The paper discusses how the Ground Control Segment was developed and validated within a complex system and with strong schedule constraints. The validation plan was designed to rapidly de-risk the challenges due to multi- satellite aspects, to focus on a few critical tests and to allow a strong agility for taking into account the parallel developments of the ground segment, the flight software and the simulation tools.
The constellation deployment in less than one year was challenging, due to the number of satellites to be operated. Having at the same time, some satellites in LEOP (Launch and Early Orbit Phase) and others conducting in-orbit validation, orbit raising and finally others already in “routine” phase. This required some specific management of the operations and of the team organization.
The CONOPS (CONcept of OPerationS) is designed to reach a high automation level, allowing to operate such a constellation with staffing constraints, while ensuring the right level of satellite safety and mission availability for a 8-year mission duration
Grain Size- And Temperature-Dependent Phonon-Mediated Heat Transport in the Solid Electrolyte Interphase: A First-Principles Study
No full textThe solid electrolyte interphase (SEI) is a passive layer, typically a few hundred angstroms thick, that forms on the electrode surface in the first few battery cycles when the electrode is in contact with the electrolyte in lithium-metal batteries. Composed of a combination of lithium salts and organic compounds, the SEI plays a critical role in battery performance, serving as a channel for Li-ion shuttling. Its structure typically comprises an inorganic component-rich sublayer near the electrode and an outer organic component-rich sublayer. Understanding heat transport through the SEI is crucial for improving battery pack safety, particularly since the Li-ion diffusion coefficient exhibits an exponential temperature dependence. This study employs first-principles calculations to investigate phonon-mediated temperature-dependent lattice thermal conductivity across the inorganic components of the SEI, including, LiF, Li2O, Li2 S, Li 2CO3 , and LiOH. This study is also extended to the dependence of the grain size on thermal conductivity, considering the mosaic-structured nature of the SEI
Creating Sustainable School and Home Gardens: The Buzz About Bees
No full textThis fact sheet describes bees--honey bees and native bees--and the services they provide as pollinators. It describes the threats that bees face, including habitat loss, pesticide use, climate change, and diseases and parasites. It also outlines ways to help bees
Curriculum Subcommittee Agenda April 3, 2025
No full textApproval of Minutes - March 6, 2025 Program Proposals Semester Course Approval Reviews Other Business Adjourn: 3:00 p
Faculty Senate Minutes March 3, 2025
No full textCall to Order Approval of Minutes - February 3, 2025 University Business New Business Information EPC Report - February 3 Emergency/Risk Survey Reports Parking and Transportation School of Graduate Studies Professional Responsibilities and Procedures Committee (PRPC) Old Business New Business Adjourn - 4:13 p
A Novel Method for Deriving the Binaural Interaction Component and Its Association With Spatial Listening Ability in Adults
Get PDFSpatial listening helps children detect and focus on specific sounds in noisy environments. Classrooms require filtering relevant speech (e.g., teacher\u27s voice) from background noise, which is challenging without strong spatial listening skills
Mid-Century Modern Design\u27s Influence on Homes of Today
Get PDFMid century modern design emerged after the end of World War 2 with its height between 1930\u27s-60\u27s. There was a sense of optimism and a sense of wanting to move on from the tragedy and devestation the war had inflicted