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Evening use of light-emitting tablets may disrupt healthy sleep -- ScienceDaily

On evenings when using light-emitting tablets, participants' self-selected bedtimes were on average half an hour later, and they showed suppressed melatonin levels, delayed timing of melatonin secretion onset, and later sleep onset. When using the tablets, participants rated themselves as less sleepy in the evenings and less alert in the first hour after awakening on the following mornings.
ComiXology, which has become one of the biggest distributors of digital comic books, hit a milestone in June when it reached 180 million unique comic book downloads since it started business in 2009, said David Steinberger, the company’s chief executive, and a co-founder. Of those downloads, 80 million were in the last six months. The company’s success mirrors a surge in digital sales, which reached $70 million last year, up from $25 million in 2011, according to a report released July 15 by ICv2, an online trade publication that covers pop culture. Digital sales made up 19 percent of the total North American market, which rose 13 percent to $750 million in 2012, up from $665 million the year before.
Bloomberg Businessweek offers advertisers several ways to appear on its iPad and iPhone app. The cost of a quarterly sponsorship -- which includes a full-page ad, a "brought to you by" logo and various banner ads -- is $85,000. IPad advertisers are given certain performance metrics on their ads, such as time spent and content downloads. Microsoft Dynamics and Credit Suisse USA are among the brands to sponsor sections. The magazine plans to offer monthly sponsorships starting in the third quarter of this year. "There's a certain first-mover status for advertisers on the tablet," said Hugh Wiley, publisher, Bloomberg Businessweek. The magazine does not bundle print and iPad ads, meaning advertisers who want to appear in both must pay separately. The open rate for a full-page ad in the weekly's worldwide edition is $161,600. Mr. Wiley said Bloomberg Businessweek does not discount its mobile or iPad ads, because there is limited inventory and high demand. "IPad is a big revenue driver for us," he said. The publication, which in May had more than 225,000 mobile- and tablet-app subscribers, saw first-quarter ad revenue on the app grow 147% from a year earlier.