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  2. Proxmark3 - Wikipedia

    en.wikipedia.org/wiki/Proxmark3

    Proxmark3 is a multi-purpose hardware tool for radio-frequency identification (RFID) security analysis, research and development. It supports both high frequency (13.56 MHz) and low frequency (125/134 kHz) proximity cards and allows users to read, emulate, fuzz, and brute force the majority of RFID protocols.

  3. List of amateur radio software - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio_software

    Software License Operating Systems Features Amateur Contact Log by N3FJP Proprietary Windows Logging, Transceiver control, Callbook lookup, QSL handling (Hardcopy / LoTW / eQSL / Club Log), Awards, DX Spots, Digital Modes

  4. Lexis (linguistics) - Wikipedia

    en.wikipedia.org/wiki/Lexis_(linguistics)

    In systemic-functional linguistics, a lexis or lexical item is the way one calls a particular thing or a type of phenomenon. Since a lexis from a systemic-functional perspective is a way of calling, it can be realised by multiple grammatical words such as "The White House", "New York City" or "heart attack".

  5. Vorbis - Wikipedia

    en.wikipedia.org/wiki/Vorbis

    Vorbis uses the modified discrete cosine transform for converting sound data from the time domain to the frequency domain. The resulting frequency-domain data is broken into noise floor and residue components, and then quantized and entropy coded using a codebook-based vector quantization algorithm. The decompression algorithm reverses these ...

  6. Ansys HFSS - Wikipedia

    en.wikipedia.org/wiki/Ansys_HFSS

    Ansys HFSS (high-frequency structure simulator) is a commercial finite element method solver for electromagnetic (EM) structures from Ansys. [ 1 ] Engineers use Ansys HFSS primarily to design and simulate high-speed, high-frequency electronics in radar systems, communication systems, satellites, ADAS, microchips, printed circuit boards, IoT ...

  7. High frequency - Wikipedia

    en.wikipedia.org/wiki/High_frequency

    High frequency (HF) is the ITU designation [1] for the band of radio waves with frequency between 3 and 30 megahertz (MHz). It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred meters).

  8. What are the BRIC nations? Why did Donald Trump ... - AOL

    www.aol.com/bric-nations-why-did-donald...

    Donald Trump continues to threaten tariffs against foreign nations, this time toward a bloc of nine countries if they try to undermine the dollar's global dominance.

  9. Bandwidth extension - Wikipedia

    en.wikipedia.org/wiki/Bandwidth_extension

    In most systems frequencies lower than 250 Hz are cut and bandwidth only extends to frequencies of 4 or 8 kHz. Using filtering and waveshaping low and high-frequency response can be extended. By low pass filtering the lowest octave and half-wave rectifying a waveform is created with a fundamental half of the original frequency.