Why are some gemstones like ruby and emerald red and green, yet diamond is colorless? As with many things in life, when it comes to gemstones, looks can be deceiving. While all are beautiful, rubies, sapphires, and diamonds each attain their brilliant color through different means. Transition metals can transform even the plainest crystal into a coveted treasure.
abraxaszugzwang commented on the word chikan Chikan (ç´æ¼¢, ?ã«ã³, or ? ? ã) is a Japanese term meaning molester or pervert. The term is frequently used to describe people, who take advantage of the crowded conditions on the public transit systems to touch people, primarily females, sexually. March 29, 2007
Kanban (çæ¿) (literally signboard or billboard in Chinese and Japanese) is a scheduling system for lean manufacturing and just-in-time manufacturing (JIT). Kanban is an inventory control system for supply chains. Taiichi Ohno, an industrial engineer at Toyota, developed kanban to improve manufacturing efficiency. Kanban is one method to achieve JIT. Kanban became an effective tool to support running a production system as a whole, and an excellent way to promote improvement.