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  2. KarTrak - Wikipedia

    en.wikipedia.org/wiki/KarTrak

    KarTrak ACI tags consisted of a plate with 13 horizontal labels put in a vertical arrangement that are also understood as data lines, which could have 13 different forms. These labels, or symbols, stand for the single digits 0-9, the number 10 as an extra feature for the checksum line, and the "START" and "STOP" labels that gave reference to ...

  3. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    [6] [7] [8] Quizlet's blog, written mostly by Andrew in the earlier days of the company, claims it had reached 50,000 registered users in 252 days online. [9] In the following two years, Quizlet reached its 1,000,000th registered user. [10] Until 2011, Quizlet shared staff and financial resources with the Collectors Weekly website. [11]

  4. Treatment and control groups - Wikipedia

    en.wikipedia.org/wiki/Treatment_and_control_groups

    A clinical control group can be a placebo arm or it can involve an old method used to address a clinical outcome when testing a new idea. For example in a study released by the British Medical Journal, in 1995 studying the effects of strict blood pressure control versus more relaxed blood pressure control in diabetic patients, the clinical control group was the diabetic patients that did not ...

  5. Track geometry car - Wikipedia

    en.wikipedia.org/wiki/Track_geometry_car

    Furthermore, the increased operating speeds of trains of that era required more meticulously maintained tracks. In 1925, the Chemins de fer de l'Est put a track geometry car into operation carrying an accelerograph developed by Emile Hallade, the inventor of the Hallade method. The accelerograph could record horizontal and vertical movement as ...

  6. Randomized controlled trial - Wikipedia

    en.wikipedia.org/wiki/Randomized_controlled_trial

    A randomized controlled trial (or randomized control trial; [2] RCT) is a form of scientific experiment used to control factors not under direct experimental control. Examples of RCTs are clinical trials that compare the effects of drugs, surgical techniques, medical devices , diagnostic procedures , diets or other medical treatments.

  7. Car controls - Wikipedia

    en.wikipedia.org/wiki/Car_controls

    The large hand-levers set the rear-wheel parking brake and put the transmission in neutral (left) and control an after-market 2-speed transmission adapter (right). Car controls are the components in automobiles and other powered road vehicles , such as trucks and buses , used for driving and parking.

  8. Multiple choice - Wikipedia

    en.wikipedia.org/wiki/Multiple_choice

    Multiple choice questions lend themselves to the development of objective assessment items, but without author training, questions can be subjective in nature. Because this style of test does not require a teacher to interpret answers, test-takers are graded purely on their selections, creating a lower likelihood of teacher bias in the results ...

  9. Self-control - Wikipedia

    en.wikipedia.org/wiki/Self-control

    In the short term, overuse of self-control leads to the depletion of that resource. [4] However, in the long term, the use of self-control can strengthen and improve the ability to control oneself over time. [3] [5] Self-control is also a key concept in the general theory of crime, a major theory in criminology.