But the quarterly results suggest that Microsoft is holding its own against the open source challenge.
The increased penetration of volatile and intermittent renewable energy sources challenges existing power-distribution methods as current dispatch methods were not designed to consider high levels of volatility.
The U.S. EPA has also recently launched crowd-sourcing challenges that focus on the development of algorithms to predict toxicological end points using ToxCast™ data (U.S. EPA 2014h).
A model with separate, but interactive calcium sources, challenges the prevailing view that asynchronous release results exclusively from an expansion of the highly restricted calcium domains surrounding the same calcium channels that govern synchronous release (Borst and Sakmann, 1996; Meinrenken et al., 2002).
Email us at [email protected] Tell your family and friends: doing the challenge together will make it easier and more fun for you to complete At the end of the sustainable sourcing challenge, we'll pick two challengers at random to win £200 worth of vouchers from the Sustainable Restaurant Association for dinner at a sustainable restaurant near them.
Russia's go-to search engine, Yandex, has launched a free and open-source challenge to Google's App Engine called "cocaine".
In one classic encounter, Bernard Kalb, of CNN's "Reliable Sources," challenged Michael Isikoff of Newsweek to defend the press obsession with Ms. Levy, prompting Mr. Isikoff to shoot back that "Reliable Sources" itself had done six shows critiquing the Chandra Levy coverage -- more stories than Newsweek had published about the actual case.
Thus, new digital data sources challenge the implied social contract between health systems, patients and epidemiologists undertaking research and disease surveillance.
However, the particular characteristics of big data (mainly the linkability requirement and the accumulation of data collected from multiple sources) challenge usual SDC approaches.
UPDATE: Multiple sources challenge Bachmann's characterization of the extent to which a tax hike on the wealthiest Americans would affect "small business owners".
