As people generally dont send messages to say their request has been fulfilled, Ushahidi has no way of knowing how successful it has been. Still, the system is unprecedented, says Christopher Csikszentmihalyi, director of the Center for Future Civic Media at the Massachusetts Institute of Technology.
48. The example of a Haitian clinic receiving response from the Red Cross suggests that the 4636 texting service has .
49. The original purpose of creating 4636 was to that followed the 2008 Kenya election.
50. According Nicolas di Tada, the difficult part of work for 4636 Haitian operation is .
51. Ushahidi is not clear of the effect of 4636 since senders usually do not give a feedback when .
参考答案
47. Hundreds of volunteers.
48. tangible impact
49. gather reports of violence
50. making responders on the ground aware of them
51. their request has been fulfilled
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