Appendix:Polish surnames. Polish surnames are known from the Middle Ages, but only 200 years ago did the inherited surnames become compulsory. The most common Polish names Nowak, Nowakowski, Nowacki, and Nowicki are variants meaning new, Przybyszewski and Przybylski mean he who has arrived.
Beta Waves. Beta Waves, sometimes also called the beta rhythm, is the frequency of the electrical activity in the brain that falls between 12 and 30 Hz and is the state that is associated with normal waking consciousness. These brain waves are classified as low and high amplitudes.
Definition - What does Beta Particle mean? A Beta Particle is a subatomic particle emitted from nucleus of radioactive atoms called beta atoms. This particle is identical with an electron. The difference between an electron and a Beta Particle is that the electron originates outside the nucleus while the Beta Particle originates inside the nucleus. It is also called high-energy electron because it moves very fast.