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2. Spread spectrum - Wikipedia

   en.wikipedia.org/wiki/Spread_spectrum

   Moreover, for a given noise power spectral density (PSD), spread-spectrum systems require the same amount of energy per bit before spreading as narrowband systems and therefore the same amount of power if the bitrate before spreading is the same, but since the signal power is spread over a large bandwidth, the signal PSD is much lower — often ...

3. Gilbert U-238 Atomic Energy Laboratory - Wikipedia

   en.wikipedia.org/wiki/Gilbert_U-238_Atomic...

   Gilbert cloud chamber, assembled An alternative view of kit contents. The lab contained a cloud chamber allowing the viewer to watch alpha particles traveling at 12,000 miles per second (19,000,000 m/s), a spinthariscope showing the results of radioactive disintegration on a fluorescent screen, and an electroscope measuring the radioactivity of different substances in the set.

4. Direct-sequence spread spectrum - Wikipedia

   en.wikipedia.org/.../Direct-sequence_spread_spectrum

   Direct-sequence spread-spectrum transmissions multiply the symbol sequence being transmitted with a spreading sequence that has a higher rate than the original message rate. Usually, sequences are chosen such that the resulting spectrum is spectrally white. Knowledge of the same sequence is used to reconstruct the original data at the receiving ...

5. Watch Your Kids Experiment and Learn With These Editor ... - AOL

   www.aol.com/lifestyle/best-science-kits-kids...

   Teach kids ages 8 and up about the laws of physics with this comprehensive science kit featuring six different projects, including a rubber band car, sharpening wheel, and rocket launcher.

6. Littlebits' latest kits are inspired by modern inventors - AOL

   www.aol.com/news/2018-09-12-littlebits-base...

   LittleBits is introducing three new kits that teach children about electronics and how to think with a creative, inventive and activist mindset. The Base Inventor Kit, which will retail for $99.99 ...

7. Frequency-hopping spread spectrum - Wikipedia

   en.wikipedia.org/wiki/Frequency-hopping_spread...

   Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals by rapidly changing the carrier frequency among many frequencies occupying a large spectral band. The changes are controlled by a code known to both transmitter and receiver .

8. I work in a research lab and know how to make science ... - AOL

   www.aol.com/news/research-lab-know-science-fun...

   My son was given a science kit last year for his birthday and we've been working through the experiment list. He is especially enamored with the book How Things Work , which he was gifted after ...

9. Code-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Code-division_multiple_access

   CDMA is a spread-spectrum multiple-access technique. A spread-spectrum technique spreads the bandwidth of the data uniformly for the same transmitted power. A spreading code is a pseudo-random code in the time domain that has a narrow ambiguity function in the frequency domain, unlike other narrow pulse codes. In CDMA a locally generated code ...