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A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock.It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, known as the balance spring or hairspring.
In 2010, Bulova introduced the Precisionist, a new type of quartz watch with a higher frequency crystal (262 144 Hz, eight times the industry standard 32 768 Hz) which is claimed to be accurate to ±10 seconds per year (0.32 ppm) and has a smooth sweeping seconds hand like automatic watches rather than the typical quartz watch seconds hand that ...
Band diagram for Schottky barrier at equilibrium Band diagram for semiconductor heterojunction at equilibrium. In solid-state physics of semiconductors, a band diagram is a diagram plotting various key electron energy levels (Fermi level and nearby energy band edges) as a function of some spatial dimension, which is often denoted x. [1]
A diamond cut is a style or design guide used when shaping a diamond for polishing such as the brilliant cut. Cut refers to shape (pear, oval), and also the symmetry, proportioning and polish of a diamond. The cut of a diamond greatly affects a diamond's brilliance—a poorly-cut diamond is less luminous.
The Design Council's visual representation of their Double Diamond design and innovation process. Double Diamond is the name of a design process model popularized by the British Design Council in 2005. [1] The process was adapted from the divergence-convergence model proposed in 1996 by Hungarian-American linguist Béla H. Bánáthy.