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  2. International scale of river difficulty - Wikipedia

    en.wikipedia.org/wiki/International_scale_of...

    Because of the large range of difficulty that exists beyond Class IV, Class V is an open-ended, multiple-level scale designated by class 5.0, 5.1, 5.2, etc. Each of these levels is an order of magnitude more difficult than the last. That is, going from Class 5.0 to Class 5.1 is a similar order of magnitude as increasing from Class IV to Class 5.0.

  3. Kardashev scale - Wikipedia

    en.wikipedia.org/wiki/Kardashev_scale

    Projection of the Kardashev scale to 2040 based on data from the International Energy Agency World Energy Outlook. Kardashev presented for the first time a classification of civilizations according to the level of the rate of their energy consumption, or ability to harness power, in an article entitled Transmission of Information by Extraterrestrial Civilizations, published in 1964 first in ...

  4. Technology readiness level - Wikipedia

    en.wikipedia.org/wiki/Technology_readiness_level

    Level 2 – Potential Application Validated Level 3 – Proof-of-Concept Demonstrated, Analytically and/or Experimentally Level 4 – Component and/or Breadboard Laboratory Validated Level 5 – Component and/or Breadboard Validated in Simulated or Realspace Environment Level 6 – System Adequacy Validated in Simulated Environment

  5. List of body armor performance standards - Wikipedia

    en.wikipedia.org/wiki/List_of_body_armor...

    Level 2 armor is medium-level protection suitable for extended wear and may be either overt or covert. This armor protects against stab threats with a strike energy of 33±0.60 J (24.3±0.44 ft·lbf). The overtest condition for this level is 50±0.70 J (36.9±0.51 ft·lbf).

  6. List of U.S. security clearance terms - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._security...

    T3 or T3R - Tier 3 or Tier 3 Reinvestigation, now replace all NACLC. T5 and T5R - Tier 5 or Tier 5 Reinvestigation, now replace SSBI and SBPR respectively. Yankee White – An investigation required for personnel working with the President and Vice President of the United States. Obtaining such clearance requires, in part, an SSBI.

  7. Torino scale - Wikipedia

    en.wikipedia.org/wiki/Torino_scale

    The one-sigma margin, which is used by ESA NEOCC one-sigma, [10] means that the close approach point is within those bounds with a 68.3% probability, while the 3-sigma margin, used by NASA JPL SSD, corresponds to 99.7% probability. The probability of an impact is the integral of the probability distribution over the cross section of Earth in ...

  8. The 5 Surest Signs You’re Middle Class – Not Poor - AOL

    www.aol.com/5-surest-signs-middle-class...

    Our top pick pays up to 5% cash back, a $200 bonus on top, and $0 annual fee ... Mortgage lenders view a 36% debt-to-income ratio as a manageable level for applicants. If you earn $5,000 in one ...

  9. Camera angle - Wikipedia

    en.wikipedia.org/wiki/Camera_angle

    Medium shot; Two shot; Medium close-up; Close-up; Extreme close-up; Where the camera is placed in relation to the subject can affect the way the viewer perceives the subject. Some of these many camera angles are the high-angle shot, low-angle shot, bird's-eye view, and worm's-eye view. A viewpoint is the apparent distance and angle from which ...