1.1 Study Designs
․Retrospective Studies
․Prospective Studies
※ Survival Analysis
; Deals with analysis of data that have "time to an event".
※ Survival time
; Time until an event occurs.
※ Event
; a. relapse of a disease
b. death
c. response to a treatment
; Economical,
To obtain answers quickly because the cas
distribution efficiency, which will encourage rural consumption and unleash the huge potential of the vast rural market.
2-3. The rise of the middle-class
A rapidly growing middle class has emerged. According to the National Bureau of Statistic of PRC (NBS), middle class refers to those with annual household income of 60,000 yuan (USD 7,230) to 500,000 yuan (USD 60,240). This group of people
Advantages: quickly written, sent, and stored; low cost for distribution
(장점: 빨리 쓰고 보내고 저장이 가능; 낮은 비용)
Disadvantages: Messages are easily and commonly misinterpreted
(메시지는 쉽게 흔히 왜곡)
Not appropriate for sending negative messages
(부정적 메시지를 보내는 것은 부적절)
Ⅲ Success in Korea
There are several crucial barriers for Xperia PLAY to achieve success in Korean market.
1. Legal barriers _ Game Shut Down System
On 20 April, 2011, Game Shut Down System was approved by bill judge committee of Korea. The Game Shut Down system is to prohibit adolescent from playing on-line game from midnight to 6 a.m. of the next day, and its object is to reduce inte