A5101801109- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Radiation Therapy and Dosimetry
- Vladimir Nabokov Literary Studies
- Currency Recognition and Detection
- Privacy, Security, and Data Protection
- Species Distribution and Climate Change
- Digital Marketing and Social Media
- Data-Driven Disease Surveillance
- Educational Reforms and Innovations
- Consumer Behavior in Brand Consumption and Identification
- Media, Gender, and Advertising
- X-ray Spectroscopy and Fluorescence Analysis
- Particle Detector Development and Performance
- CCD and CMOS Imaging Sensors
- Privacy-Preserving Technologies in Data
- Astro and Planetary Science
- Computational Physics and Python Applications
- Advanced X-ray and CT Imaging
- Calibration and Measurement Techniques
University of Minnesota
2021-2023
University of Florida
2023
University of Minnesota System
2022
Twin Cities Orthopedics
2021
Context. Solar coronal jets seen in extreme ultraviolet (EUV) are ubiquitous on the Sun, and they have been found at edges of active regions, boundaries holes, quiet Sun. Jets various shapes, sizes, brightness, velocities, durations time, which complicates their detection by automated algorithms. So far, solar reported Heliophysics Event Knowledgebase (HEK) mostly humans looking for them data, with different levels precision regarding timing positions. Aims. We created a catalog observed EUV...
The FOXSI-4 sounding rocket will fly a significantly upgraded instrument in NASA's first solar are campaign. It deploy direct X-ray focusing optics which have revolutionized our understanding of astrophysical phenomena. For example, they allowed NuSTAR to provide imaging and IXPE (scheduled for launch 2021) polarization observations with detectors higher photon rate capability greater sensitivity than their predecessors. FOXSI is the dedicated mission using this method has demonstrated high...
When and where the magnetic field energy is released converted in eruptive solar flares remains an outstanding topic physics. To shed light on this question, here we report multi-wavelength observations of a C9.4-class limb flare that occurred 2017 August 20. The flare, accompanied by flux rope eruption white coronal mass ejection, features three post-impulsive X-ray microwave bursts immediately following its main impulsive phase. For each burst, both imaging suggest non-thermal electrons...
Where and how flares efficiently accelerate charged particles remains an unresolved question. Recent studies revealed that a "magnetic bottle" structure, which forms near the bottom of large-scale reconnection current sheet above flare arcade, is excellent candidate for confining accelerating particles. However, further understanding its role requires linking various observational signatures to underlying coupled plasma particle processes. Here we present first study combining...
Context. Solar coronal jets seen in EUV are ubiquitous on the Sun, have been found and at edges of active regions, boundaries holes, quiet Sun. Jets various shapes, sizes, brightness, velocities duration time, which complicates their detection by automated algorithms. So far, solar reported Heliophysics Event Knowledgebase (HEK) mostly humans looking for them data, with different levels precision regarding timing positions. Aims. We create a catalogue observed 304 {\AA} containing precise...
We present a multi-wavelength analysis of two flare-related jets on November 13, 2014, using data from SDO/AIA, RHESSI, Hinode/XRT, and IRIS. Unlike most coronal where hard X-ray (HXR) emissions are usually observed near the jet base, in these events HXR found at several locations, including corona. carry out first differential emission measure (DEM) that combines both AIA (and XRT when available) bandpass filter RHESSI measurements for jets, obtain self-consistent results across wide...
The Focusing Optics X-ray Solar Imager (FOXSI ) sounding rockets are the first solar-dedicated direct-focusing hard (HXR) instruments. FOXSI use Wolter-1 style HXR optics and solid state double-sided strip detectors. images of solar sources influenced by point spread function optics, 2D segmentation detector into intersections, noise in readout. For FOXSI-4, new high-resolution will cause instrument angular resolution to be limited minimum pitch its CdTe detectors (60 μm). also affected...
Citizen science provides a way to analyze large and complex data sets, complementary contemporary tools such as machine learning. Indeed, while trained algorithms excel in the task they are for, humans can spot outliers make serendipitous discoveries. With recent new instruments, we able observe Sun heliosphere at high cadence resolution, providing amounts of data, revealing complexity observed features, leading discovery features on small scales. We will present how citizen science, still...
Understanding the nature of energetic particles in solar atmosphere is one most important outstanding problems heliophysics. Flare-accelerated compose a huge fraction flare energy budget; they have large influences on how events develop; are an source high-energy found heliosphere; and single corollary to other areas astrophysics. Despite importance this area study, topic has past decade received only small resources necessary for full investigation. For example, NASA selected no new...
Geographic privacy or geo-privacy refers to the keeping private of one's geographic location, especially restriction geographical data maintained by personal electronic devices. Geo-privacy is a crucial aspect security; however, it often goes unnoticed in daily activities. With surge use Large Multimodal Models (LMMs), such as GPT-4, for Open Source Intelligence (OSINT), potential risks associated with breaches have intensified. This study develops location-integrated GPT-4 based model named...
Solar active regions contain a broad range of temperatures, with the thermal plasma distribution often observed to peak in few millions kelvin. Differential emission measure (DEM) analysis can allow instruments diverse temperature responses be used concert estimate this distribution. NuSTAR HXR observations are uniquely sensitive highest-temperature components corona, and thus extremely powerful for examining signatures reconnection-driven heating. Here, we use diagnostics combination EUV...