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Todd J. Freeborn

University of Alabama · US
Area of research
Control and Systems Engineering · Electrical and Electronic Engineering
Research interest
Research interests include Advanced Control Systems Design, Electrical and Bioimpedance Tomography, Body Composition Measurement Techniques, and Analog and Mixed-Signal Circuit Design.
h-index
28
citations
3,455
works
154
NIH funding
primary concept
email

Recent publications

Design, synthesis and simulation of fractional-order element using MOS transistors as distributed resistive capacitive devices
Scientific Reports 2025cited by 8position: middledoi
Generalized Approach for Fractional-Order Low-Pass Butterworth Filter Realization with an Inverse Follow the Leader Filter (IFLF) Topology
2025cited by 2position: lastdoi
Electrical Impedance Myography Quantifies Holding and Pushing During Isometric Muscle Contractions
IEEE Transactions on Neural Systems and Rehabilitation Engineering 2025cited by 1position: middledoi
Practical design of variable fractional-order capacitors with a single tuning feature using field effect transistors and variable capacitance diodes
Scientific Reports 2025cited by 1position: middledoi
Transitional Frequencies of Fractional-Order Transitional Transfer Functions Using Butterworth and Sync-Tuned Approximations
2025cited by 1position: lastdoi
Finite Element Model in LTspice of a Distributed RC-Structure Fractional-Order Capacitor Device
2025cited by 1position: lastdoi
Can segmental bioelectrical impedance be used as a measure of muscle quality?
Medical Engineering & Physics 2024cited by 9position: middledoi
Smartphone-Based Parameter Estimation of the Cole-Impedance Model for Assessment of Agricultural Goods
IEEE Access 2024cited by 2position: middledoi
Student Satisfaction and Perceptions of Summer REU Experience in an Engineering/Communicative Disorders Focused Site at Program Midpoint
2024cited by 2position: firstdoi
Student Progress after a Learning in Advance Course to Prepare Engineering Students for Circuit Analysis in Electrical Engineering
2024cited by 2position: firstdoi
Picosecond programmable delay line using commercial components for precision timing signal alignment
Journal of Instrumentation 2024cited by 1position: firstdoi
Exploring the Effect of Electrode Material on the Electrical Impedance of Liquid Samples
2024cited by 1position: lastdoi
Emulation of Fractional-Order Impedance with $\alpha = 0.5$ Using MOSFET Revised RC-Ladder Topology
2024cited by 1position: lastdoi
Fractional-Order Immitance Converter (FGIC44) Performance Using Wideband Fractional-Order Element Seeds
2024cited by 1position: lastdoi
Fractional-Order Equivalent Circuit Representation of Kohlrabi Tissue Samples
2024cited by 1position: lastdoi
Distinguishing Liquid Solutions With Alcohol Using Electrical Impedance Measurements: Preliminary Study for Food Safety Applications
IEEE Sensors Journal 2023cited by 13position: middledoi
A novel method for in-situ extracting bio-impedance model parameters optimized for embedded hardware
Scientific Reports 2023cited by 12position: middledoi
Localized Multi-Site Knee Bioimpedance as a Predictor for Knee Osteoarthritis Associated Pain Within Older Adults During Free-Living
IEEE Open Journal of Engineering in Medicine and Biology 2023cited by 11position: lastdoi
Parameter Estimation of the Single-Dispersion Fractional Cole-Impedance Model With the Embedded Hardware
IEEE Sensors Journal 2023cited by 9position: middledoi
Segmental Tissue Resistance of Healthy Young Adults during Four Hours of 6-Degree Head-Down-Tilt Positioning
Sensors 2023cited by 5position: firstdoi
Effect of Localized Electrode/Pulp Tissue Conditions on Bipolar Measurements of Banana Samples Electrical Impedance
2023cited by 2position: lastdoi
Approximated Fractional-Order Capacitor "Seed" Impedance Characterization to Support Fully-Controllable Immittance Converters
2023cited by 1position: lastdoi
System Performance and User Feedback Regarding Wearable Bioimpedance System for Multi-Site Knee Tissue Monitoring: Free-Living Pilot Study With Healthy Adults
Frontiers in Electronics 2022cited by 10position: lastdoi
Localized Bioimpedance Measurements with the MAX3000x Integrated Circuit: Characterization and Demonstration
Sensors 2021cited by 21position: lastdoi
Cole-Impedance Model Representations of Right-Side Segmental Arm, Leg, and Full-Body Bioimpedances of Healthy Adults: Comparison of Fractional-Order
Fractal and Fractional 2021cited by 20position: firstdoi
Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study
IEEE Open Journal of Circuits and Systems 2021cited by 11position: lastdoi
Residual Impedance Impact on MAX30001 Accuracy for Bioimpedance Applications
2021cited by 7position: lastdoi
Analysis of localized bioimpedance from healthy young adults during activities of the vocal folds using Cole-impedance model representation
Biomedical Signal Processing and Control 2021cited by 4position: firstdoi
Estimating Cole-Impedance Parameters from Limited Frequency-Band Impedance Measurements
2021cited by 4position: firstdoi
Threshold and Trend Artifacts in Localized Multi-Frequency Bioimpedance Measurements
IFAC-PapersOnLine 2021cited by 3position: firstdoi

Grants

IRES: Design and Characterization of Fractional-Order Microelectronic Circuits and Devices in Czechia
NSF2505179$447,1422025–2028PIRePORTER
RET Site: Engaging and Training Alabama STEM Teachers in Sensing Technologies
NSF2302144$602,6452023–2027PIRePORTER
IRES Site: Fractional-Order Circuits and Systems Research Collaboration with EU COST Action
NSF1951552$299,8612020–2025PIRePORTER
REU Site: Engineering Sensors Systems and Signal Processing for Speech Pathology
NSF1852161$352,0342019–2024PIRePORTER
REU Site: Innovative Engineering Using Renewable Resources
NSF1559867$373,9542016–2019PIRePORTER

Frequent collaborators

Ahmed S. Elwakil · University of Calgary21 papers (2013–2018) · 14 papers (2017–2023)Brent Maundy · University of Calgary13 papers (2013–2018) · 10 papers (2017–2025)Anis Allagui · Florida International University9 papers (2016–2018)Bo Fu · Shenyang Pharmaceutical University8 papers (2018–2020) · 8 papers (2018–2025)Michael R. Esco · University of Alabama6 papers (2016–2019) · 6 papers (2023–2025) · 5 papers (2023–2025) · 4 papers (2018–2025) · 4 papers (2018–2025) · 4 papers (2016–2017) · 3 papers (2023–2024) · 3 papers (2016–2017)Michael V. Fedewa · University of Alabama3 papers (2018–2019) · 3 papers (2020–2024) · 3 papers (2023–2024) · 2 papers (2023–2023)Fábio Yuzo Nakamura · Universidade Europeia2 papers (2017–2018)