300 research outputs found

    Creating the National Security State:A History of the Law That Transformed America

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    Douglas Stuart holds the J. William Stuart and Helen D. Stuart Chair in In- ternational Studies, Business and Management at Dickinson College and is an adjunct professor at the U.S. Army War College. He provides an insightful history of the struggle to reform com- pletely the U.S. national security estab- lishment from 1937 to 1960, an effort that resulted in the creation of the De- partment of Defense, the National Se- curity Council (NSC), the Central Intelligence Agency (CIA), and three separate armed service departments un- der a secretary of defense

    Untapped: The Scramble for Africa’s Oil

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    The Shield and the Cloak: The Security of the Commons

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    Rising Powers, Shrinking Planet: The New Geopolitics of Energy

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    Set and Drift

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    Evaluation of the Northern Territory Library's Libraries and Knowledge Centres Model

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    Evaluation of the Northern Territory Library's model for Libraries and Knowledge Centres in Indigenous communities

    Determining the sources of nutrient flux to water in headwater catchments:Examining the speciation balance to inform the targeting of mitigation measures

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    Diffuse water pollution from agriculture (DWPA) is a major environmental concern, with significant adverse impacts on both human and ecosystem health. However,without an appropriate understanding of the multiple factors impacting on water, mitigation measures cannot be targeted. Therefore, this paper addresses this gap in understanding, reporting the hydrochemicalmonitoring evidence collected from the UK Government's Demonstration Test Catchments (DTC) programme including contrasting chalk and clay/mudstone catchments. We use data collected at daily and sub-daily frequency overmultiple sites to address: (1) How does the behaviour of the full range of nitrogen (N) species and phosphorus (P) fractions vary? (2) How do N species and P fractions vary inter- and intra-annually? (3)What do these data indicate about the primary pollution sources? And (4) which diffuse pollution mitigation measures are appropriate in our study landscapes? Key differences in the rates of flux of nutrients were identified, dependent on catchment characteristics. Full N speciation and P fractionation, together with dissolved organic carbon (DOC) enabled identification of the most likely contributing sources in each catchment. Nitrate (NO3-N) was the dominant N fraction in the chalk whereas organic and particulate N comprised the majority of the load in the clay/mudstone catchments. Despite current legislation, orthophosphate (PO4-P)was not found to be the dominant form of P in any of the catchments monitored. The chalk sub-catchments had the largest proportion of inorganic/dissolved organic P (DOP), accompanied by episodic delivery of particulate P (PP). Contrastingly, the clay/mudstone sub-catchments loads were dominated by PP and DOP. Thus, our results show that by monitoring both the inorganic and organic fractions a more complete picture of catchment nutrient fluxes can be determined, and sources of pollution pin-pointed. Ultimately, policy and management to bring nutrient impacts under control will only be successful if a multistressor approach is adopted
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