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OPOOpenbaar Primair Onderwijs (Dutch: Public Primary Education)
OPOOpen Purchase Order (procurement)
OPOOrgan Procurement Organization
OPOOffice of Procurement Operations (US DHS)
OPOOphthalmic and Physiological Optics (publication; Wiley)
OPOOsaka Philharmonic Orchestra (Japan)
OPOOracle Power Objects
OPOOptical Parametric Oscillator(s)
OPOOffice of the Permanent Observer (Inter-Parliamentary Union)
OPOOvernight Pulse Oximetry (pulmonary disease)
OPOPorto, Portugal - Porto (Airport Code)
OPOOffice of Public Outreach (NASA)
OPOObservation Post Officer
OPOOther People's Opinions
OPOOne Person Operated
OPOOperations Order
OPOOpposite Polarity
OPOOffice of Provincial Outreach
OPOOPNAV Principal Official
OPOOvamboland People's Organization
OPOOffice of Personnel Operations
OPOOrbiter Project Office
OPOPsion OPL Output (executable file extension)
OPOOutpatient Observation
OPOOne Production Only (acting contracts)
OPOOperational Performance Objectives
OPOOrbiting Planetary Observatory
OPOOil Pressure Out
OPOOver-Pressure Operations
OPOOhio Peace Officer
References in periodicals archive ?
The sun's polar magnetic fields weaken, go to zero and then emerge again with the opposite polarity.
Therapy aims to gradually introduce the client to the possibility of the opposite polarity which might be accompanied by the light of a new perspective on their life.
It was not unusual to use two keys or a compound key in which deflection in one direction produced a pulse of one polarity and deflection in the other direction produced a pulse of the opposite polarity.
Tribo-charging occurs when particles are charged with opposite polarity by particle-particle and particle-surface charge mechanisms because of their work function or triboelectric series [23, 31].
To investigate the effect of electrical stimulation on the attraction of positively or negatively charged cells toward an electric field of opposite polarity, we used unidirectional pulsed current (squared pulse).
Opposite polarity doesn't always diagnose the rhythm as ventricular tachycardia.
During the process, the signals from the opposite polarity are attenuated enough so that they don't interfere with each other.
When the magnetic field at the north pole is removed by CMEs, a band with opposite polarity moves up, as if on a conveyor belt, to replace it.
This signal should be of small (limited) bandwidth with the same amplitude and opposite polarity to the sidelobes of an initial signal.
In the Bearden model, electrical charges are actually dipoles, where each dipole consists of one real charge and an opposite polarity virtual charge.