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  2. List of S&P 400 companies - Wikipedia

    en.wikipedia.org/wiki/List_of_S&P_400_companies

    S&P 500 constituent Avago Technologies Ltd. (NASD:AVGO) acquired Broadcom. S&P MidCap 400 constituent Federal Realty Investment Trust (NYSE:FRT) replaced Broadcom Corp. (NASD:BRCM) in the S&P 500. [274] January 27, 2016: POOL: Pool Corporation: BMR: BioMed Realty Trust: Private equity firm Blackstone Real Estate Partners acquired BioMed Realty ...

  3. Pulse tube refrigerator - Wikipedia

    en.wikipedia.org/wiki/Pulse_tube_refrigerator

    The performance of the cooler is determined mainly by the quality of the regenerator. It has to satisfy conflicting requirements: it must have a low flow resistance (so it must be short with wide channels), but the heat exchange should also be good (so it must be long with narrow channels). The material must have a large heat capacity.

  4. Mid-Infrared Instrument - Wikipedia

    en.wikipedia.org/wiki/Mid-Infrared_Instrument

    To allow mid-infrared observations within the JWST, the MIRI instrument has an additional cooling system. It works roughly similar to how most refrigerators or an air-conditioner works: a fluid is brought down to a cold temperature in the warm section, and sent back to the cold section where it absorbs heat, then it goes back to the condenser.

  5. Mid-infrared - Wikipedia

    en.wikipedia.org/?title=Mid-infrared&redirect=no

    This page was last edited on 30 July 2024, at 05:30 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...

  6. List of major stock exchanges - Wikipedia

    en.wikipedia.org/wiki/List_of_major_stock_exchanges

    This is a list of major stock exchanges.Those futures exchanges that also offer trading in securities besides trading in futures contracts may be listed both here and in the list of futures exchanges.

  7. S&P 400 - Wikipedia

    en.wikipedia.org/wiki/S&P_400

    The index serves as a gauge for the U.S. mid-cap equities sector and is the most widely followed mid-cap index. It is part of the S&P 1500, which also includes the S&P 500 for larger U.S. based companies, and the S&P 600 for smaller companies, though all three indices include a handful of foreign stocks that trade on the U.S. stock exchanges.

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