Effective management of nitrateimpacted aquifers requires identifying the sources of nitrate to the aquifer, and understanding the transport and fate of nitrate within the aquifer. Source identification is crucial to effective source mitigation; conversion of residential septic systems to sewer in a rural community will be ineffective if the primary source of nitrate contamination is agricultur...

We report on methane (CH4) stable isotope (?13C and ?2H) measurements from landfast sea ice collected near Barrow (Utqiagvik, Alaska) Cape Evans (Antarctica) over the winter-to-spring transition. These provide novel insights into pathways of CH4 production consumption in ice. found substantial differences between two sites. Sea overlying shallow shelf was supersaturated with a clear microbial o...

Today’s smartphone users face a security dilemma: many apps they install operate on privacy-sensitive data, although they might originate from developers whose trustworthiness is hard to judge. Researchers have proposed more and more sophisticated static and dynamic analysis tools as an aid to assess the behavior of such applications. Those tools, however, are only as good as the privacy polici...