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...expenses that carriers incur in handling SMS messages. He showed that the wireless channels contribute about a tenth of a cent to a carrier's cost, that accounting charges might be twice that and that other costs basically round to zero because texting requires so little of a mobile network's infrastructure. Summing up, Keshav found that a text message doesn't cost providers more than 0.3 cent. (Read "When Fingers Do the Flirting...
Cost analyses will stay flexible because SMS isn't constrained by capacity, says Collins. He draws an analogy to amusement parks: "Once you build the park (or wireless network), the marginal cost of each customer (or text message) is minimal...
...based on the same network of media and on-the-ground reporting that global health officials use to detect and track emerging diseases like H1N1 and 2003's SARS. Indeed, the first details of the strange respiratory disease, which surfaced in southern China six years ago, weren't published in a medical journal, nor were they issued by the World Health Organization (WHO). Rather, the earliest hints came in the media, in stories published in Chinese newspapers about people in Guangzhou and Shenzhen being struck down by a mysterious illness. Because Chinese officials forbade official reporting of the new disease...
...iPhone app makes HealthMap information even more accessible to the average person, by marrying the map's network of global data with the smartphone's GPS function, which tracks an individual user's location. So the program enables you to find out instantly whether there are any new outbreaks close to home. "The system can deliver reports that are relevant to your location," says Clark Freifield, a Ph.D. student at MIT's Media Lab and a co-founder of HealthMap. See the top iPhone applications...
...aren't trained epidemiologists. Global health officials already struggle to separate the noise from the truth; for every actual outbreak of a new disease, there are countless false or overstated reports. But in an interconnected age, when both information and disease can spread in an instant, having an imperfect network is better than none at all. "This is an alert tool that is not trying to raise fear but awareness instead," says Brownstein. "We want to encourage good public-health information, and at the end of the day that's what this app is about." Knowing too much...