見やすいプレゼン資料の作り方（パワポ）
http://www.slideshare.net/yutamorishige50/how-to-present-better
sinカーブ
https://www.facebook.com/ogasahara/posts/10205957061457974
https://video.xx.fbcdn.net/hvideo-xaf1/v/t42.4659-2/11060340_835206776516073_2013727857_n.mp4?oh=1b18ecd1c80aa698187dcb9adbfa1fe2&oe=5602CFE8