pulsating empyema - Definition. Was ist pulsating empyema
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Was (wer) ist pulsating empyema - definition

THE FORM OF WAVE PRODUCED FROM A HALF-WAVE RECTIFIER OR A FULL-WAVE RECTIFIER
Pulsating direct current; Pulsating current; Pulsating DC
  • Types of electric current

Pleural empyema         
ACCUMULATION OF PUS IN THE PLEURAL CAVITY THAT CAN DEVELOP WHEN BACTERIA INVADE IT
Pyothorax; Empyema, pleural; Empyemia; Pyelothorax
Pleural empyema is a collection of pus in the pleural cavity caused by microorganisms, usually bacteria. Often it happens in the context of a pneumonia, injury, or chest surgery.
Pulsar         
  • Composite optical/X-ray image of the [[Crab Nebula]], showing [[synchrotron emission]] in the surrounding [[pulsar wind nebula]], powered by injection of magnetic fields and particles from the central pulsar.
  • Jocelyn Bell]] first recognised evidence of a pulsar, exhibited at [[Cambridge University Library]]
  • Gamma-ray pulsars detected by the [[Fermi Gamma-ray Space Telescope]].
  • Illustration of the "[[lighthouse]]" effect produced by a pulsar.
  • Neutron star types (24 June 2020)}}
  • Animation of a rotating pulsar. The sphere in the middle represents the neutron star, the curves indicate the magnetic field lines and the protruding cones represent the emission zones.
HIGHLY MAGNETIZED, RAPIDLY ROTATING NEUTRON STAR OR WHITE DWARF
Rotation-powered pulsar; Radio pulsar; Pulsars; Rotation-powered pulsars; Rotation powered pulsars; Rotation powered pulsar; Radio pulsars; Timing noise; Light cylinder; Pulser; Radio Pulsar; Pulsating Radio Sources; Pulsating radio star; Rotating neutron star; Pulsating Radio Star; Lighthouse model
A pulsar (from pulsating radio source) Extract of page 249 is a highly magnetized rotating neutron star that emits beams of electromagnetic radiation out of its magnetic poles. This radiation can be observed only when a beam of emission is pointing toward Earth (similar to the way a lighthouse can be seen only when the light is pointed in the direction of an observer), and is responsible for the pulsed appearance of emission.
pulsar         
  • Composite optical/X-ray image of the [[Crab Nebula]], showing [[synchrotron emission]] in the surrounding [[pulsar wind nebula]], powered by injection of magnetic fields and particles from the central pulsar.
  • Jocelyn Bell]] first recognised evidence of a pulsar, exhibited at [[Cambridge University Library]]
  • Gamma-ray pulsars detected by the [[Fermi Gamma-ray Space Telescope]].
  • Illustration of the "[[lighthouse]]" effect produced by a pulsar.
  • Neutron star types (24 June 2020)}}
  • Animation of a rotating pulsar. The sphere in the middle represents the neutron star, the curves indicate the magnetic field lines and the protruding cones represent the emission zones.
HIGHLY MAGNETIZED, RAPIDLY ROTATING NEUTRON STAR OR WHITE DWARF
Rotation-powered pulsar; Radio pulsar; Pulsars; Rotation-powered pulsars; Rotation powered pulsars; Rotation powered pulsar; Radio pulsars; Timing noise; Light cylinder; Pulser; Radio Pulsar; Pulsating Radio Sources; Pulsating radio star; Rotating neutron star; Pulsating Radio Star; Lighthouse model
['p?ls?:]
¦ noun Astronomy a celestial object, thought to be a rapidly rotating neutron star, that emits regular rapid pulses of radio waves.
Origin
1960s: from puls(ating st)ar, on the pattern of quasar.

Wikipedia

Pulsed DC

Pulsed DC (PDC) or pulsating direct current is a periodic current which changes in value but never changes direction. Some authors use the term pulsed DC to describe a signal consisting of one or more rectangular ("flat-topped"), rather than sinusoidal, pulses.

Pulsed DC is commonly produced from AC (alternating current) by a half-wave rectifier or a full-wave rectifier. Full wave rectified ac is more commonly known as Rectified AC. PDC has some characteristics of both alternating current (AC) and direct current (DC) waveforms. The voltage of a DC wave is roughly constant, whereas the voltage of an AC waveform continually varies between positive and negative values. Like an AC wave, the voltage of a PDC wave continually varies, but like a DC wave, the sign of the voltage is constant.

Pulsating direct current is used on PWM controllers.