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  2. Threadless - Wikipedia

    en.wikipedia.org/wiki/Threadless

    Threadless began as a T-shirt design competition on the now defunct dreamless.org, a forum where users experimented with computers, code, and art. Nickell and DeHart invited users to post their designs on a dreamless thread (hence the name Threadless), and they would print the best designs on T-shirts.

  3. Pre-order - Wikipedia

    en.wikipedia.org/wiki/Pre-order

    Pre-order. A pre-order is an order placed for an item that has not yet been released. The idea for pre-orders came because people found it hard to get popular items in stores because of their popularity. Companies then had the idea to allow customers to reserve their personal copy before its release, which has been a huge success.

  4. Morse code - Wikipedia

    en.wikipedia.org/wiki/Morse_code

    Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. [3] [4] Morse code is named after Samuel Morse, one of the early developers of the system adopted for electrical telegraphy .

  5. Investigating Students’ Mathematical Difficulties with ...

    files.eric.ed.gov/fulltext/ED572345.pdf

    20% 56% 24% 8. Using any method, find the -intercepts of 3 2=−4 −1. (Algebraic conventions, factorising involving negative integers and solving) 8% 40% 52% Success on the Question 1 was high, but interestingly . 2. 1 out of 24 students answered 0.5 rather than ½ suggesting a preference to work with decimals. For Question 2, only two

  6. The National Center for Education Statistics (NCES) is the primary statistical agency of the U.S. Department of Education. It is one of thirteen principal federal statistical agencies 1 whose activities are predominantly focused on the collection, compilation, processing, or analysis of information for statistical purposes.

  7. This report provides the most recent year of data available for each dropout and completion rate, summarizes long-term trends, and examines the characteristics of high school dropouts and completers. Five rates are presented to provide a broad perspective on high school dropouts and completers in the United States: the event dropout rate, the ...

  8. Cost Analysis: A Starter Kit - Institute of Education Sciences

    ies.ed.gov/seer/pdf/IES_Cost_Analysis_Starter...

    t.$5 / hour$600 (120*5)As you move through the starter kit, each step will provide more information about these three phases, exploring some of the nuances of identifying ingredients, pricing them, and creati. g and using a cost estimate.How does the starter kit align to IES grant req.

  9. Cutoff frequency - Wikipedia

    en.wikipedia.org/wiki/Cutoff_frequency

    Where s is the s-plane variable, ω is angular frequency and j is the imaginary unit.. Chebyshev filters. Sometimes other ratios are more convenient than the 3 dB point. For instance, in the case of the Chebyshev filter it is usual to define the cutoff frequency as the point after the last peak in the frequency response at which the level has fallen to the design value of the passband ripple.

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