Reconstructing aerosol optical depth using spatiotemporal Long Short-Term Memory convolutional autoencoder (open access)

Reconstructing aerosol optical depth using spatiotemporal Long Short-Term Memory convolutional autoencoder

Article describes how Aerosol Optical Depth (AOD)is a crucial atmospheric parameter in comprehending climate change, air quality, and its impacts on human health. This study presents a new solution to this challenge by providing a long-term, gapless satellite-derived AOD dataset for Texas from 2010 to 2022, utilizing Moderate Resolution Imaging Spectroradiometer (MODIS) multi-angle implementation of atmospheric correction (MAIAC) products.
Date: November 30, 2023
Creator: Liang, Lu; Daniels, Jacob; Biancardi, Micahel & Zhou, Yuye
System: The UNT Digital Library
An Optimized Control System for the Independent Control of the Inputs of the Doherty Power Amplifier (open access)

An Optimized Control System for the Independent Control of the Inputs of the Doherty Power Amplifier

Article describes how this study presents a systematic design of an optimized drive signal control system for 2.5 GHz Doherty power amplifiers (DPAs). In this manuscript, the authors analyzed and compared the PAE of the DPA and parallel-connected PA for diverse input signals generated using a designed optimized control system
Date: November 14, 2023
Creator: Sah, Pallav Kumar; Poulton, Matthew; Luyen, Hung & Mahbub, Ifana
System: The UNT Digital Library
Analyzing influence of COVID-19 on crypto & financial markets and sentiment analysis using deep ensemble model (open access)

Analyzing influence of COVID-19 on crypto & financial markets and sentiment analysis using deep ensemble model

Article describes how COVID-19 affected the world's economy severely and increased the inflation rate in both developed and developing countries. This study performs an analysis of the impact of COVID-19 on public opinion and sentiments regarding the financial markets and crypto markets.
Date: September 28, 2023
Creator: Washington, Patrick Bernard; Gali, Pradeep; Rustam, Furqan & Ashraf, Imran
System: The UNT Digital Library
Advanced Air Mobility Operation and Infrastructure for Sustainable Connected eVTOL Vehicle (open access)

Advanced Air Mobility Operation and Infrastructure for Sustainable Connected eVTOL Vehicle

Article discusses how advanced air mobility (AAM) is an emerging sector in aviation aiming to offer secure, efficient, and eco-friendly transportation utilizing electric vertical takeoff and landing (eVTOL) aircraft. This paper introduces a novel concept addressing future flight challenges and proposes a framework for integrating operations, infrastructure, connectivity, and ecosystems in future air mobility.
Date: May 16, 2023
Creator: Al-Rubaye, Saba; Tsourdos, Antonios & Namuduri, Kamesh
System: The UNT Digital Library
A Low-Power Wireless System for Predicting Early Signs of Sudden Cardiac Arrest Incorporating an Optimized CNN Model Implemented on NVIDIA Jetson (open access)

A Low-Power Wireless System for Predicting Early Signs of Sudden Cardiac Arrest Incorporating an Optimized CNN Model Implemented on NVIDIA Jetson

Article discusses the low survival rate of sudden cardiac arrest and its long-term risks that patients may experience. Authors propose a more effective method of recording and reporting sudden cardiac arrest symptoms so preventative measures may be instated earlier on to increase survival rate.
Date: February 17, 2023
Creator: Kota, Venkata Deepa; Sharma, Himanshu; Albert, Mark; Mahbub, Ifana; Mehta, Gayatri & Namuduri, Kamesh
System: The UNT Digital Library
A Shannon-Theoretic Approach to the Storage–Retrieval Trade-Off in PIR Systems (open access)

A Shannon-Theoretic Approach to the Storage–Retrieval Trade-Off in PIR Systems

Authors of the article consider the storage–retrieval rate trade-off in private information retrieval (PIR) systems using a Shannon-theoretic approach. Their focus is mostly on the canonical two-message two-database case, for which a coding scheme based on random codebook generation and the binning technique is proposed.
Date: January 11, 2023
Creator: Tian, Chao; Sun, Hua & Chen, Jun
System: The UNT Digital Library
Experimental Validation of Diffraction Lithography for Fabrication of Solid Microneedles (open access)

Experimental Validation of Diffraction Lithography for Fabrication of Solid Microneedles

Article states that microneedles are highly sought after for medicinal and cosmetic applications. However, the current manufacturing process for microneedles remains complicated, hindering its applicability to a broader variety of applications. This experimental study enables the shapes and mechanical properties of the microneedles to be predicted in advance for mass production and wide practical use for biomedical or cosmetic applications.
Date: December 14, 2022
Creator: Tan, Jun Ying; Li, Yuanki; Chamani, Faraz; Tharzeen, Aabila; Prakash, Punit; Natarajan, Balasubramaniam et al.
System: The UNT Digital Library
G-DaM: A Distributed Data Storage with Blockchain Framework for Management of Groundwater Quality Data (open access)

G-DaM: A Distributed Data Storage with Blockchain Framework for Management of Groundwater Quality Data

Authors discuss their use of a distributed and decentralized architecture to store the statistics, perform double hashing, and implement access control through smart contracts to forecast groundwater availability. Their work demonstrates a modern and innovative approach combining Distributed Data Storage and Blockchain technologies to overcome traditional data sharing, and centralized storage, while addressing blockchain limitations.
Date: November 11, 2022
Creator: Vangipuram, Sukrutha L. T.; Mohanty, Saraju P.; Kougianos, Elias & Ray, Chittaranjan
System: The UNT Digital Library
Three-Dimensional Printed, Dual-Band, Dual-Circularly Polarized Antenna Array Using Gap Waveguide Technology (open access)

Three-Dimensional Printed, Dual-Band, Dual-Circularly Polarized Antenna Array Using Gap Waveguide Technology

Article proposes a gap waveguide (GW)-based 4 × 4 dual-band, dual-circularly polarized antenna array. The combination of dual-band, dual-circularly polarized capability, high gain, high efficiency, lightweight, low cost and compact size renders the proposed design a potential candidate for commercial millimeter wave communication applications.
Date: October 22, 2022
Creator: Wu, Sifan; Li, Jianxing; Cao, Yuanxi; Yan, Sen; Xu, Kaida & Luyen, Hung
System: The UNT Digital Library
Laser Diffraction Zones and Spots from Three-Dimensional Graded Photonic Super-Crystals and Moiré Photonic Crystals (open access)

Laser Diffraction Zones and Spots from Three-Dimensional Graded Photonic Super-Crystals and Moiré Photonic Crystals

This article reports the holographic fabrication of three types of 3D graded photonic super-crystals (GPSCs) through nine beam interferences and their characteristic diffraction patterns.
Date: June 3, 2022
Creator: Hurley, Noah; Kamau, Steve; Alnasser, Khadijah; Philipose, Usha; Cui, Jingbiao & Lin, Yuankun
System: The UNT Digital Library
A self-powered wireless motion sensor based on a high-surface area reverse electrowetting-on-dielectric energy harvester (open access)

A self-powered wireless motion sensor based on a high-surface area reverse electrowetting-on-dielectric energy harvester

Article presents a motion-sensing device with the capability of harvesting energy from low-frequency motion activities. Based on the high surface area reverse electrowetting-on-dielectric (REWOD) energy harvesting technique, mechanical modulation of the liquid generates an AC signal, which is modeled analytically and implemented in Matlab and COMSOL.
Date: March 8, 2022
Creator: Tasneem, Nishat Tarannum; Biswas, Dipon K.; Adhikari, Pashupati R.; Gunti, Avinash; Patwary, Adnan B.; Reid, Russell C. et al.
System: The UNT Digital Library

Spectroscopic, structural, and strain-dependent analysis of suspended bulk WSe2 sheets

Article utilizing Raman spectroscopy and photoluminescence (PL) spectroscopy to analyze the phononic and electronic parameters in suspended bulk WSe₂ sheets, fabricated utilizing photolithography and wet chemical etching. The findings of this work will be beneficial in analyzing thermal, optical, and mechanical properties of WSe₂ in a suspended platform for its application in electronic, thermoelectric, and mechanical sensors in the future.
Date: February 8, 2022
Creator: Bandyopadhyay, Avra S. & Kaul, Anupama
System: The UNT Digital Library
Advancing Reverse Electrowetting-on-Dielectric from Planar to Rough Surface Electrodes for High Power Density Energy Harvesting (open access)

Advancing Reverse Electrowetting-on-Dielectric from Planar to Rough Surface Electrodes for High Power Density Energy Harvesting

Article presenting electrical and multiphysics-based modeling approaches of REWOD energy harvester using structured rough surface electrodes. By enhancing the overall available surface area, an increase in the overall capacitance is achieved.
Date: December 15, 2021
Creator: Adhikari, Pashupati R.; Patwary, Adnan B.; Kakaraparty, Karthik; Gunti, Avinash; Reid, Russell C. & Mahbub, Ifana
System: The UNT Digital Library
Methylammonium Lead Tri-Iodide Perovskite Solar Cells with Varying Equimolar Concentrations of Perovskite Precursors (open access)

Methylammonium Lead Tri-Iodide Perovskite Solar Cells with Varying Equimolar Concentrations of Perovskite Precursors

Article conducting a systematic study to tune the equimolar precursor ratio of the organic halide (methylammonium iodide; MAI) and metal halide (lead iodide; PbI2) in a fixed solvent mixture of N,N-dimethylformamide (DMF):dimethylsulfoxide (DMSO).
Date: December 9, 2021
Creator: Parashar, Mritunjaya & Kaul, Anupama
System: The UNT Digital Library
Photonic Band Gaps and Resonance Modes in 2D Twisted Moiré Photonic Crystal (open access)

Photonic Band Gaps and Resonance Modes in 2D Twisted Moiré Photonic Crystal

Article studying 2D twisted moiré photonic crystals without physical rotation and simulating their photonic band gaps in photonic crystals formed at different twisted angles, different gradient levels, and different dielectric filling factors.
Date: September 23, 2021
Creator: Alnasser, Khadijah; Kamau, Steve; Hurley, Noah; Cui, Jingbiao & Lin, Yuankun
System: The UNT Digital Library
Multilevel Topological Interference Management: A TIM-TIN Perspective (open access)

Multilevel Topological Interference Management: A TIM-TIN Perspective

Article combining TIN with the topological interference management (TIM) framework that identifies optimal interference avoidance schemes and formulates a TIM-TIN problem for multilevel topological interference management, wherein only a coarse knowledge of channel strengths and no knowledge of channel phases is available to transmitters.
Date: August 5, 2021
Creator: Geng, Chunhua; Sun, Hua & Jafar, Syed A.
System: The UNT Digital Library
On Batch-Processing Based Coded Computing for Heterogeneous Distributed Computing Systems (open access)

On Batch-Processing Based Coded Computing for Heterogeneous Distributed Computing Systems

This article focuses on practical computing systems with heterogeneous computing resources, and designs a novel CDC approach, called batch-processing based coded computing (BPCC), which exploits the fact that every computing node can obtain some coded results before it completes the whole task. The scheme demonstrates promising performance in terms of high computational efficiency and robustness to uncertain disturbances.
Date: July 7, 2021
Creator: Wang, Baoqian; Xie, Junfei; Lu, Kejie; Wan, Yan & Fu, Shengli
System: The UNT Digital Library
Resonance modes in moiré photonic patterns for twistoptics (open access)

Resonance modes in moiré photonic patterns for twistoptics

Article studying twistoptics for manipulating optical properties in twisted moiré photonic patterns without physical rotations. The presented approach can lead toward the study of twistoptics for the manipulating of optical properties in moiré patterns with different twist angles.
Date: April 12, 2021
Creator: Alnasser, Khadijah; Kamau, Steve; Cui, Jingbiao & Lin, Yuankun
System: The UNT Digital Library
Broadband Absorption in Patterned Metal/Weakly-Absorbing-Spacer/Metal with Graded Photonic Super-Crystal (open access)

Broadband Absorption in Patterned Metal/Weakly-Absorbing-Spacer/Metal with Graded Photonic Super-Crystal

Article studying high light absorption in two devices: a stack of Au-pattern/insulator/Au-film and a stack of Au-pattern/weakly-absorbing-material/Au-film where the Au-pattern was structured in graded photonic super-crystal. Multiple-band absorption, including one near 1500 nm, in a stack of Au-pattern/spacer/Au-film was observed.
Date: April 8, 2021
Creator: Kamau, Steve; Hassan, Safaa; Alnasser, Khadijah; Zhang, Hualiang; Cui, Jingbiao & Lin, Yuankun
System: The UNT Digital Library
Carrier photodynamics in 2D perovskites with solution-processed silver and graphene contacts for bendable optoelectronics (open access)

Carrier photodynamics in 2D perovskites with solution-processed silver and graphene contacts for bendable optoelectronics

Article reporting on the inkjet printed, direct contact study of solution-processed, 2D perovskite-based photodetectors (PDs) formed on flexible PI substrates. Silver (Ag) and graphene (Gr) inks have been engineered to serve as efficient electrical contacts for solution-processed two-dimensional (2D) organo-halide (CH3(CH2)3NH3)2(CH3NH3)n−1PbnI3n+1 (n = 4) layered perovskites, where all inkjet-printed heterostructure PDs were fabricated on polyimide (PI) substrates.
Date: March 25, 2021
Creator: Hossain, Ridwan F.; Min, Misook; Ma, Liang-Chieh; Sakri, Shambhavi R. & Kaul, Anupama
System: The UNT Digital Library
A 2.53 NEF 8-bit 10 kS/s 0.5 µm CMOS Neural Recording Read-Out Circuit with High Linearity for Neuromodulation Implants (open access)

A 2.53 NEF 8-bit 10 kS/s 0.5 µm CMOS Neural Recording Read-Out Circuit with High Linearity for Neuromodulation Implants

This article presents a power-efficient complementary metal-oxide-semiconductor (CMOS) neural signal-recording read-out circuit for multichannel neuromodulation implants.
Date: March 3, 2021
Creator: Tasneem, Nishat Tarannum & Mahbub, Ifana
System: The UNT Digital Library
Electrode and electrolyte configurations for low frequency motion energy harvesting based on reverse electrowetting (open access)

Electrode and electrolyte configurations for low frequency motion energy harvesting based on reverse electrowetting

This article explores various combinations of electrolyte concentrations, dielectrics, and dielectric thicknesses to generate maximum output power employing REWOD energy harvester with the objective of implementing a fully self-powered wearable sensor.
Date: March 3, 2021
Creator: Adhikari, Pashupati R.; Tasneem, Nishat Tarannum; Reid, Russell C. & Mahbub, Ifana
System: The UNT Digital Library
Feasibility Study of Microsecond Pulsed Microwave Ablation Using a Minimally Invasive Antenna (open access)

Feasibility Study of Microsecond Pulsed Microwave Ablation Using a Minimally Invasive Antenna

Article establishing the feasibility of producing localized ablation zones using microsecond pulsed microwave ablation (MWA) as an alternative to conventional continuous wave (CW) MWA. Results open the opportunity for developing a coupled MWA treatment and imaging system using pulsed MWA and microwave-induced thermoacoustic signals for real-time monitoring of MWA.
Date: February 16, 2021
Creator: Evans, Audrey L.; Sawicki, James F.; Luyen, Hung; Mohtashami, Yahya; Behdad, Nader & Hagness, Susan C.
System: The UNT Digital Library
Cache-Aided General Linear Function Retrieval (open access)

Cache-Aided General Linear Function Retrieval

This article designs a novel coded caching scheme that outperforms uncoded caching schemes that either use unicast transmissions or let each user recover all files in the library. It extends the scope of the authors’ past work that only considered the class of linear functions that operate element-wise over the files.
Date: December 26, 2020
Creator: Wan, Kai; Sun, Hua; Ji, Mingyue; Tuninetti, Daniela & Caire, Giuseppe
System: The UNT Digital Library