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- 戦闘機が音速付近で発する楕円状の雲が良く見える写真とムービー
--  http://gigazine.net/index.php?/news/20080125_prandtl_glauert_singularity/
- Excelマクロながら描画にDirectXを使った本格弾幕シューティング「DEX-EV」
--  http://www.forest.impress.co.jp/article/2008/01/24/dexev.html