This document discusses the speaker's experience working for Code for Japan from 2015 to 2017. It notes that the speaker has been involved in IT since 2015 and helped launch an IT startup in 2015. It also mentions that the speaker has collaborated with Code for America and Code for Japan on various civic technology projects since 2014.
The document discusses database indexing and optimization. It explains the concepts of primary keys, covering indexes, and read/write operations. It also provides examples of using indexes to optimize queries and discusses how MySQL handles read and write operations through its binary log and relay log.
Social Web Japan Vol.3 "Social Application and their support services"Naoyuki Yamada
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Social games are designed to be played together with friends according to Kristian Segerstrale of Playfish. These games allow people to play collaboratively or competitively with their friends. The key aspect is that social games are meant to be played socially with other people rather than solely by oneself.