The usage of drones is increasingly spreading into new fields application, ranging from agriculture to security. One these applications sound recording in areas difficult access. challenge that arises when using for this purpose the recorded sources must be separated noise produced by drone. intensity emitted drone depends on several factors such as engine power, propeller rotation speed, or ty...

A XMM-Newton observation is presented of the accretion driven millisecond X-ray pulsar SAX J1808.4–3658 during its 2000 outburst. The source was conclusively detected, albeit at a level of only ∼ 2 × 10 erg s. The source spectrum could be fitted with a power-law model (with a photon index of ∼2.2), a neutron star atmosphere model (with a temperature of ∼0.2 keV), or with a combination of a ther...

psoas abscesses could originate from an adjacent source of infection in the abdominopelvic cavity known as a secondary complication of acute appendicitis. however, it is considered as a very rare event when occurring late after the presentation of appendicitis. whether it is the source or complication of acute appendicitis following appendectomy remains unclear. a 25-year-old man was admitted t...