8,724 research outputs found
Fermilab Collider Run II: Accelerator Status and Upgrades
Fermilab will continue to maintain its pre-eminent position in the world of
High Energy Physics, with a unique opportunity to make unprecedented studies of
the top quark and major discoveries, until the Large Hadron collider (LHC) at
CERN becomes operational near the end of the decade. Run II is well underway
with major accelerator and detector upgrades since Run I. A program of further
upgrades to the accelerator complex will result in an integrated luminosity of
4-8 fb-1 per experiment, by the year 2009.Comment: 12 pages, 6 figures. To be published in the Proceedings of the 15th
Topical Conference on Hadron Collider Physics, HCP2004, Michigan State
University, East Lansing, MI, June 14-18, 2004 (American Institute of
Physics, NY, 2004
The New Blue Economy: the Future of Sustainability
The world’s ocean is the world’s life support. Many human activities have defined a negative relationship with the ocean. Simply put: we dump too much bad stuff in, and we take too much good stuff out. The traditional ocean economy—those ocean-based and ocean-related activities from which humans derive economic benefit— did not acknowledge or honor the ocean’s natural services, nor its finite capacity to take human abuse without undermining those services on which we depend. The “new blue economy” is the term of art for identifying those activities that improve the human relationship with the ocean and for aligning our systems of accounting and metrics to both define and enhance our ocean-positive economy. It also allows for us to account for “eco-system services” (provisioning, regulating, supporting and cultural) provided by the ocean to plants and animals (including humans). What will it take to define the new blue economy with metrics and definitions that are universally understood? First, the natural services of the ocean must be acknowledged and accounted for. Second, we must define what human activities comprise the “new blue economy,” and integrate those definitions into our standard accounting practices globally. Third, we must act to support and enhance those ocean-positive activities so that we achieve a more sustainable relationship with the ocean so that it can continue to provide the goods and services that sustain us. These steps are under way around the world and can serve as the foundation of a broader effort to truly achieve a positive human relationship with the ocean in ways that success (and enhanced economic, environmental, and human health) can be accounted for, measured, and sustained
From the Streets to the Chamber: Social Movements and the Mining Ban in El Salvador
Following an extended anti-mining campaign, El Salvador became the first country to adopt a legal ban on all forms of metallic mining. This article uses process tracing to map direct, indirect and mediated linkages between the anti-mining mobilization and the formal adoption of a mining prohibition by the national legislature in 2017. It draws on 78 interviews with campaign activists, legislators, government officials, business leaders and legal teams, and combines this information with legislative documents and reports, public opinion data, legal documents from an investment dispute filed against the Salvadoran government, and blogs and website of the Mesa Nacional Frente a la MinerĂa Metálica. This analysis gives particular attention to the spatial reach and breadth of the anti-mining networks; fissures within and situational realignment of the political elite; and the strategic use of diverse institutional openings (docking points), some of which were adapted to new purposes by movement entrepreneurs. Although major obstacles to sustainable development and environmental protection remain in El Salvador, this article identifies a set of iterative interactions between activist alliances and institutional actors that can successfully contribute to policy change
Civil Society Engagement in Free Trade Negotiations: CAFTA Opposition Movements in El Salvador
This article analyzes civil society participation in the free trade debate by focusing on networks that opposed the Central American Free Trade Agreement (CAFTA) in El Salvador. Drawing on documents, observations, and semi-structured interviews with civil society leaders, two kinds of opposition coalitions are identified. “Critic negotiators,” emphasizing active engagement and policy research, used the limited participation space opened by authorities to push for reform. “Transgressive resisters,” repudiating the formal consultation process, deployed confrontational tactics and posed more fundamental challenges. This work uses social movement theory to explore coalition resource mobilization, the role of movement entrepreneurs, strategic decision-making, mechanisms linking local and transnational activists, and the dynamics of intra-movement competition
The isotropic condition of energetic particles emitted from a large solar flare
Isotope abundance ratios for 5 to 50 MeV/nuc nuclei from a large solar flare were measured. The measurements were made by the heavy isotope spectrometer telescope (HIST) on the ISEE-3 satellite orbiting the Sun near an Earth-Sun liberation point approximately one million miles sunward of the Earth. Finite values for the isotope abundance ratios C-13/C-12, N-15/N-14, O-18/O-16, Ne-22/Ne-20, Mg-25/Mg-24, and Mg-26/Mg-24, and upper limits for the isotope abundance ratios He-3/He-4, C-14/C-12, O-17/O-16 and Ne-21/Ne-20 were reported. Element abundances and spectra were measured to compare the flare with other reported flares. The flare is a typical large flare with low Fe/O abundance or = to 0.1). For C-13/C-12, N-15/N-14, O-18/O-16, Mg-25/Mg-24 and Mg-26/Mg-24 isotope abundance ratios agree with the solar system abundance ratios. Measurement for Ne-22/Ne-20 agree with the isotopic composition of the meteoritic component neon-A
Effect of continuous gamma-ray exposure on performance of learned tasks and effect of subsequent fractionated exposures on blood-forming tissue
Sixteen monkeys trained to perform continuous and discrete-avoidance and fixed-ratio tasks with visual and auditory cues were performance-tested before, during, and after 10-day gamma-ray exposures totaling 0, 500, 750, and 1000 rads. Approximately 14 months after the performance-test exposures, surviving animals were exposed to 100-rad gamma-ray fractions at 56-day intervals to observe injury and recovery patterns of blood-forming tissues. The fixed-ratio, food-reward task performance showed a transient decline in all dose groups within 24 hours of the start of gamma-ray exposure, followed by recovery to normal food-consumption levels within 48 to 72 hours. Avoidance tasks were performed successfully by all groups during the 10-day exposure, but reaction times of the two higher dose-rate groups in which animals received 3 and 4 rads per hour or total doses of 750 and 1000 rads, respectively, were somewhat slower
Multidimensional collaboration; reflections on action research in a clinical context
This paper reflects on the challenges and benefits of multidimensional collaboration in an action research study to evaluate and improve preoperative education for patients awaiting colorectal surgery. Three cycles of planning, acting,observing and reflecting were designed to evaluate practice and implement change in this interactive setting, calling for specific and distinct collaborations. Data collection includes: observing educational interactions; administering patient evaluation questionnaires; interviewing healthcare staff, patients and carers; patient and carer focus groups; and examining written and audiovisual educational materials. The study revolves around and depends on multi-dimensional collaborations. Reflecting on these collaborations highlights the diversity of perspectives held by all those engaged in the study and enhances the action research lessons. Successfully maintaining the collaborations recognises the need for negotiation, inclusivity, comprehension, brokerage,and problem-solving. Managing the potential tensions is crucial to the successful implementation of changes introduced to practice and thus has important implications for patients’ well-being. This paper describes the experiences from an action research project involving new and specific collaborations, focusing on a particular healthcare setting. It exemplifies the challenges of the collaborative action research process and examines how both researchers and practitioners might reflect on the translation of theory into educational practices within a hospital colorectal department. Despite its context-specific features, the reflections on the types of challenges faced and lessons learned provide implications for action researchers in diverse healthcare settings across the world
Effect of gravity on methane-air combustion
Analytical and numerical techniques dealing with the theoretical description of the influence of zero and reduced gravitational acceleration on diffusion flames, with a view to improving understanding of fires in space vehicles, were developed in support of experimental work performed in this area. This was done in order to confirm qualitative understanding of the process, to determine the quantitative accuracy of numerical predictions, and to establish a mathematical model of the process for subsequent use as a predictive and exploratory tool. The following results were accomplished: (1) derivation of differential equations and boundary conditions describing the system, (2) details of the computations, using a FORTRAN computer program, for calculating the flow and heat and mass transfer in two dimensions (both steady and unsteady). It was shown that the experimental behavior can be reproduced with fair accuracy, provided that the time step is sufficiently short
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