Acoustic Metasurface-Aided Broadband Noise Reduction in Automobile Induced by Tire-Pavement Interaction (open access)

Acoustic Metasurface-Aided Broadband Noise Reduction in Automobile Induced by Tire-Pavement Interaction

Article demonstrating a technique utilizing acoustic metasurfaces (AMSes) with high reflective characteristics using relatively lightweight materials for noise reduction without any change in mechanical strength or weight of the tire. The proposed design can significantly reduce the noise arising from tire–pavement interaction over a broadband of acoustic frequencies under 1000 Hz and over a wide range of vehicle speeds using a negative effective dynamic mass density approach.
Date: July 30, 2021
Creator: Heo, Hyeonu; Sofield, Matthew; Ju, Jaehyung & Neogi, Arup
System: The UNT Digital Library
Complexity synchronization: a measure of interaction between the brain, heart and lungs (open access)

Complexity synchronization: a measure of interaction between the brain, heart and lungs

Authors of the article address the measurable consequences of the network effect (NE) on time series generated by different parts of the brain, heart, and lung organ-networks (ONs), which are directly related to their inter-network and intra-network interactions. The authors assert that these same physiologic ONs have been shown to generate crucial event (CE) time series, and herein are shown ,using modified diffusion entropy analysis (MDEA) to have scaling indices with quasiperiodic changes in complexity, as measured by scaling indices, over time.
Date: July 15, 2023
Creator: Mahmoodi, Korosh; Kerick, Scott E.; Grigolini, Paolo; Franaszczuk, Piotr J. & West, Bruce J.
System: The UNT Digital Library
Evaluation of the Vibration Signal during Milling Vertical Thin-Walled Structures from Aerospace Materials (open access)

Evaluation of the Vibration Signal during Milling Vertical Thin-Walled Structures from Aerospace Materials

Article describes how the main functions of thin-walled structures are to reduce the weight of the finished product and to increase the rigidity of the structure. The authors compared the vibration signal for different approaches to machining thin walled-components with vertical walls made of Ti6AI4V titanium alloy and Inconel 625 nickel alloy.
Date: July 14, 2023
Creator: Kurpiel, Szymon; Zagrórski, Krzysztof; Skryzpkowski, Krzysztof & Brostow, Witold, 1934-
System: The UNT Digital Library
Multitask deep-learning-based design of chiral plasmonic metamaterials (open access)

Multitask deep-learning-based design of chiral plasmonic metamaterials

This article presents an end-to-end functional bidirectional deep-learning (DL) model for three-dimensional chiral metamaterial design and optimization. This ML model utilizes multitask joint learning features to recognize, generalize, and explore in detail the nontrivial relationship between the metamaterials’ geometry and their chiroptical response, eliminating the need for auxiliary networks or equivalent approaches to stabilize the physically relevant output. This model efficiently realizes both forward and inverse retrieval tasks with great precision, offering a promising tool for iterative computational design tasks in complex physical systems. Other potential applications include photodetectors, polarization-resolved imaging, and circular dichroism (CD) spectroscopy.
Date: July 1, 2020
Creator: Ashalley, Eric; Acheampong, Kingsley; Besteiro, Lucas V.; Yu, Peng; Neogi, Arup; Govorov, Alexander O. et al.
System: The UNT Digital Library
Optical Pump Terahertz Probe (OPTP) and Time Resolved Terahertz Spectroscopy (TRTS) of emerging solar materials Editor’s Pick (open access)

Optical Pump Terahertz Probe (OPTP) and Time Resolved Terahertz Spectroscopy (TRTS) of emerging solar materials Editor’s Pick

Article describes how photoconductivity is the crucial benchmark to assess the potential of any emerging material for future solar applications. This tutorial aims to familiarize the reader with the main THz techniques used to explore emerging materials.
Date: July 19, 2023
Creator: Neu, Jens
System: The UNT Digital Library
Ultrasound Imaging by Thermally Tunable Phononic Crystal Lens (open access)

Ultrasound Imaging by Thermally Tunable Phononic Crystal Lens

This article demonstrates the detections and mappings of a solid object using a thermally tunable solid-state phononic crystal lens at low frequency for potential use in future long-distance detection.
Date: July 26, 2021
Creator: Jin, Yuqi & Neogi, Arup
System: The UNT Digital Library
Weakly Aligned Molecules: From Molecular Detectors to Room-Temperature Tunable Masers (open access)

Weakly Aligned Molecules: From Molecular Detectors to Room-Temperature Tunable Masers

Conference proceeding presenting a new mechanism of manipulation of population in molecular rotational levels in a weakly aligned molecules. Originally presented as an invited talk at the 29th International Laser Physics Workshop held July 19-23, 2021.
Date: July 23, 2021
Creator: Roy, Colin D.; Branković, Zorica & Rostovtsev, Yuri V.
System: The UNT Digital Library
An X-ray fading, UV brightening QSO at z ≈ 6 (open access)

An X-ray fading, UV brightening QSO at z ≈ 6

Article presents quasi-simultaneous X-ray and rest-frame UV observations of quasi-stellar object (QSO) z = 6.025 QSO J1641+3755.
Date: July 26, 2022
Creator: Vito, F.; Mignoli, M.; Gilli, R.; Brandt, William Nielsen; Shemmer, Ohad; Bauer, Franz E. et al.
System: The UNT Digital Library