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We constrain the velocity spectral distribution of global-scale solar convective cells at depth using techniques of local helioseismology. We calibrate the sensitivity of helioseismic waves to large-scale convective cells in the interior by…

Solar and Stellar Astrophysics · Physics 2015-05-18 S. M. Hanasoge , T. L. Duvall , M. L. DeRosa

We investigate a wireless power transfer (WPT)-based backscatter-mobile edge computing (MEC) network with a {reconfigurable intelligent surface (RIS)}.In this network, wireless devices (WDs) offload task bits and harvest energy, and they…

Information Theory · Computer Science 2022-06-03 S. Zargari , C. Tellambura , S. Herath

Kelvin-Helmholtz instability (KHI) is a basic physical process in fluids and magnetized plasmas, with applications successfully modelling e.g. exponentially growing instabilities observed at magnetospheric and heliospheric boundaries, in…

Solar and Stellar Astrophysics · Physics 2018-07-10 Xiaohong Li , Jun Zhang , Shuhong Yang , Yijun Hou , Robert Erdelyi

Accurate seismic velocity estimations are vital to understanding Earth's subsurface structures, assessing natural resources, and evaluating seismic hazards. Machine learning-based inversion algorithms have shown promising performance in…

Geophysics · Physics 2024-08-12 Fu Wang , Xinquan Huang , Tariq Alkhalifah

The air interface technology plays a crucial role in optimizing the communication quality for users. To address the challenges brought by the radio channel variations to air interface design, this article proposes a framework of wireless…

Signal Processing · Electrical Eng. & Systems 2024-10-01 Jianhua Zhang , Yichen Cai , Li Yu , Zhen Zhang , Yuxiang Zhang , Jialin Wang , Tao Jiang , Liang Xia , Ping Zhang

A new dataset of atomic oxygen and molecular nitrogen number density profiles, along with thermospheric temperature profiles between 180 and 500 km, has been developed. These profiles are derived from solar occultation measurements made by…

Accurate and reliable air quality forecasting is essential for protecting public health, sustainable development, pollution control, and enhanced urban planning. This letter presents a novel WaveCatBoost architecture designed to forecast…

Machine Learning · Computer Science 2025-02-18 Jintu Borah , Tanujit Chakraborty , Md. Shahrul Md. Nadzir , Mylene G. Cayetano , Shubhankar Majumdar

Expensive ultrasonic anemometers are usually required to measure wind speed accurately. The aim of this work is to overcome the loss of accuracy of a low cost hot-wire anemometer caused by the changes of air temperature, by means of a…

Features of the response of pickup ions (PUIs) to the Kelvin--Helmholtz instability (KHI) on the heliopause (HP) are examined by means of two-dimensional hybrid simulations. We assume the supersonic neutral solar wind as the source of PUIs…

Space Physics · Physics 2021-07-21 Ken Tsubouchi

The increased sensitivity of millimeter-wave facilities now makes possible the detection of low amounts of gas in debris disks. Some of the gas-rich debris disks harbor peculiar properties, with possible pristine gas and secondary generated…

Solar and Stellar Astrophysics · Physics 2017-04-05 J. Pericaud , E. Di Folco , A. Dutrey , S. Guilloteau , V. Pietu

With a new joint-deconvolution pipeline, we combine the single-dish and interferometric atomic hydrogen (HI) data of M51 observed by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) (FEASTS program) and the Very Large Array…

High-resolution large-eddy simulation (LES) is exploited to study indoor air turbulence and its effect on the dispersion of respiratory virus-laden aerosols and subsequent transmission risks. The methodology is applied to assess two…

Fluid Dynamics · Physics 2022-02-02 Mikko Auvinen , Joel Kuula , Tiia Grönholm , Matthias Sühring , Antti Hellsten

Traditional methods for classifying global navigation satellite system (GNSS) jamming signals typically involve post-processing raw or spectral data streams, requiring complex and costly data transmission to cloud-based interference…

Machine Learning · Computer Science 2026-05-15 Thorben Wegner , Lucas Heublein , Tobias Feigl , Felix Ott , Christopher Mutschler , Alexander Rügamer

One of the techniques for estimating the surface particle concentration with a diameter of fewer than 2.5 micrometers (PM2.5) is using aerosol optical depth (AOD) products. Different AOD products are retrieved from various satellite…

Computer Vision and Pattern Recognition · Computer Science 2023-02-22 Ali Mirzaei , Hossein Bagheri , Mehran Sattari

Accurate medium-range precipitation forecasting is crucial for hydrometeorological risk management and disaster mitigation, yet remains challenging for current numerical weather prediction (NWP) systems. Traditional ensemble systems such as…

Atmospheric and Oceanic Physics · Physics 2025-10-24 Tianyi Xiong , Haonan Chen

Clear air turbulence, also known as CAT, can cause damage to an aircrafts structure and, in severe cases, harm passengers. Though CAT has been thoroughly studied since the mid 1960s, scientists have not been able to create an accurate…

Atmospheric and Oceanic Physics · Physics 2007-08-27 Ankita Nagirimadugu

Breathing signal monitoring can provide important clues for human's physical health problems. Comparing to existing techniques that require wearable devices and special equipment, a more desirable approach is to provide contact-free and…

Computational Engineering, Finance, and Science · Computer Science 2017-02-08 Xuyu Wang , Chao Yang , Shiwen Mao

Accurately characterizing migration velocity models is crucial for a wide range of geophysical applications, from hydrocarbon exploration to monitoring of CO2 sequestration projects. Traditional velocity model building methods such as…

Machine Learning · Computer Science 2024-11-15 Rafael Orozco , Huseyin Tuna Erdinc , Yunlin Zeng , Mathias Louboutin , Felix J. Herrmann

Genesis potential indices (GPIs) are widely used to understand the climatology of tropical cyclones (TCs). However, the sign of projected future changes depends on how they incorporate environmental moisture. Recent theory combines…

Atmospheric and Oceanic Physics · Physics 2024-04-03 Daniel R Chavas , Suzana J Camargo , Michael K Tippett

Accurate information on waves and storm surges is essential to understand coastal hazards that are expected to increase in view of global warming and rising sea levels. Despite the recent advancement in development and application of…