Robust unsupervised feature learning is a critical yet tough task for synthetic aperture radar (SAR) automatic target recognition (ATR) with limited labeled data.The developing contrastive self-supervised learning (CSL) method, which learns informative representations by solving an instance discrimination task, provides a novel method for learning
Orbital maneuver detection for non-cooperative targets in space is a key task in space situational awareness.This study develops a passive maneuver detection algorithm using line-of-sight angles measured Cartridge Position Finder by a space-based optical sensor, especially for targets in high-altitude orbit.Emphasis is placed on constructing a new
Bowel obstructions can have a variety of causes, including impacted feces, adhesions, volvulus, non-internal hernias, and in rare cases internal hernias.We report a 63-year-old woman who presented to KYO-DOPHILUS the emergency department with severe abdominal pain, nausea, vomiting, and obstructive symptoms that had started 12 hours earlier.A compu
The SARS-CoV-2 virus responsible for the COVID-19 global pandemic has exhibited a striking capacity for viral evolution that drives continued evasion from vaccine and infection-induced immune responses.Mutations in the receptor binding domain of the S1 subunit of the spike glycoprotein have led to considerable escape from antibody responses, reduci
BackgroundThe association between baseline seropositivity to human adenovirus (HAdV) type 5 and increased HIV acquisition in the Step HIV Vaccine Study has raised questions concerning frequency of acquired and/or persistent Adenovirus infections among adults at high risk of HIV-1 infection.MethodologyTo evaluate the frequency and pattern of HAdV sh