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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The response provided by a cache is stale (the content's age exceeds a maximum age set by a Cache-Control header or heuristically chosen lifetime). 111 Revalidation Failed The cache was unable to validate the response, due to an inability to reach the origin server. 112 Disconnected Operation

  3. reCAPTCHA - Wikipedia

    en.wikipedia.org/wiki/ReCAPTCHA

    In 2013, reCAPTCHA began implementing behavioral analysis of the browser's interactions to predict whether the user was a human or a bot. The following year, Google began to deploy a new reCAPTCHA API, featuring the "no CAPTCHA reCAPTCHA"—where users deemed to be of low risk only need to click a single checkbox to verify their identity. A ...

  4. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

  5. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    The code-rate is hence a real number. A low code-rate close to zero implies a strong code that uses many redundant bits to achieve a good performance, while a large code-rate close to 1 implies a weak code. The redundant bits that protect the information have to be transferred using the same communication resources that they are trying to protect.

  6. Insurer stocks fall after Trump says 'we're going to knock ...

    www.aol.com/news/insurer-stocks-fall-trump-says...

    Shares of CVS fell 5.35% to $46.73, Cigna slipped 2.6% to $274.63, while UnitedHealth was down 3.54% at $502.07 in afternoon trading.

  7. Leaked documents show Cuban military sitting on billions of ...

    www.aol.com/leaked-documents-show-cuban-military...

    The July balance sheet shows the company is repaying a long-term loan of 45 billion Cuban pesos, which is about $1.9 billion using the 24-pesos-per-dollar exchange rate.

  8. Ford recalls nearly 300,000 F-Series trucks over defective ...

    www.aol.com/ford-recalls-nearly-300-000...

    Ford dealers will update the powertrain control module software free of charge, according to the automaker. Notification letters are expected to be mailed to owners of affected vehicles on Jan. 13 ...

  9. False positives and false negatives - Wikipedia

    en.wikipedia.org/wiki/False_positives_and_false...

    The false positive rate (FPR) is the proportion of all negatives that still yield positive test outcomes, i.e., the conditional probability of a positive test result given an event that was not present. The false positive rate is equal to the significance level. The specificity of the test is equal to 1 minus the false positive rate.