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  2. Napier's bones - Wikipedia

    en.wikipedia.org/wiki/Napier's_bones

    The leftmost group is chosen first, in this case 46. The largest square on the square root bone less than 46 is picked, which is 36 from the sixth row. The first digit of the solution is 6, since the sixth row was chosen. Then, the number in the second column from the sixth row on the square root bone, 12, is set on the board.

  3. Pascaline - Wikipedia

    en.wikipedia.org/wiki/Pascaline

    The pascaline (also known as the arithmetic machine or Pascal's calculator) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen , France. [ 2 ]

  4. Bone - Wikipedia

    en.wikipedia.org/wiki/Bone

    Cancellous bone or spongy bone, [12] [11] also known as trabecular bone, is the internal tissue of the skeletal bone and is an open cell porous network that follows the material properties of biofoams. [13] [14] Cancellous bone has a higher surface-area-to-volume ratio than cortical bone and it is less dense. This makes it weaker and more flexible.

  5. Ball-and-socket joint - Wikipedia

    en.wikipedia.org/wiki/Ball-and-socket_joint

    The ball-and-socket joint (or spheroid joint) is a type of synovial joint in which the ball-shaped surface of one rounded bone fits into the cup-like depression of another bone. The distal bone is capable of motion around an indefinite number of axes, which have one common center. This enables the joint to move in many directions.

  6. Mechanical calculator - Wikipedia

    en.wikipedia.org/wiki/Mechanical_calculator

    A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically, or (historically) a simulation such as an analog computer or a slide rule.

  7. Mechanostat - Wikipedia

    en.wikipedia.org/wiki/Mechanostat

    The adaptation (feed-back control loop) of bone according to the maximum forces is considered to be a lifelong process. Hence, bone adapts its mechanical properties according to the needed mechanical function: bone mass, bone geometry, and bone strength (see also Stress-strain index, SSI) adapt to everyday usage/needs. "Maximal force" in this ...

  8. Bone density - Wikipedia

    en.wikipedia.org/wiki/Bone_density

    A scanner used to measure bone density using dual energy X-ray absorptiometry. Bone density, or bone mineral density, is the amount of bone mineral in bone tissue.The concept is of mass of mineral per volume of bone (relating to density in the physics sense), although clinically it is measured by proxy according to optical density per square centimetre of bone surface upon imaging. [1]

  9. Ilizarov apparatus - Wikipedia

    en.wikipedia.org/wiki/Ilizarov_apparatus

    The mechanical functions of the Ilizarov apparatus are based upon the principles of tension (pulling force), wherein the controlled application of mechanical tension to the damaged limb immobilises the broken bones, and so facilitates the biological process of distraction osteogenesis (the regeneration of bone and soft tissue) in a reliable and ...