20,727 research outputs found

    Towards more inclusive long-term bulk water resource management

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    Fresh water resources provide a platform for complex and often emotional issues to develop, particularly in resource scarcity situations. Bulk water infrastructure contains elements of a public good and proved vulnerable to failures in market and government driven allocation strategies. Common to both are uncaptured costs and benefits due to shortcomings in cost quantification techniques. Natural ecosystems stands to lose the most since ecosystem services are often not quantifiable in monetary terms and therefore neglected in allocation decision-making. This paper took on the challenge of expanding current decision-support in order to promote more inclusive long-term water management. A case-study approach with the focus on a choice related problem regarding different long-term bulk water resource management options was applied in the Western Cape province. The paper incorporated components of economic valuation theory, a public survey and a modified Delphi expert panel technique. Both spatial and temporal dimensions of the decision-making context were expanded. Two surveys were completed to accommodate these expansions. The first focused on public preference in water allocation management and the relative merit of accommodating public preference in highly specialised decision-making such as long-term water allocation decision-making. The second survey utilized a modified Delphi technique in which an expert panel indicated the relative merit of two alternative long-term allocation strategies. A willingness to pay for 'greener' water was observed and may be used to motivate a paradigm shift from management's perspective to consider, without fear of harming their own political position, 'greener' water supply options more seriously even if these options imply higher direct costs to public.water management, decision-support, public participation, Resource /Energy Economics and Policy,

    Leveling the playing field: Exploiting technology to enhance tertiary learning

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    This paper reports on an on-going case study project to explore ICT/ eLearning across several disciplines and with students from diverse backgrounds at tertiary level in New Zealand. The project has been designed to address issues of tertiary-level pedagogy, epedagogy, and research with the goal of building eLearning capacity, leveraging pedagogical change, and closing participatory gaps for students and lecturers. Initial design decisions, the pedagogy that has informed the case studies, and the challenges and benefits of working across subjects and levels in a multi-disciplinary team are described. We also discuss research knowledge mobilization within our own instructional context and more broadly elsewhere

    Approaches used to evaluate the social Impacts of protected areas

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    Protected areas are a key strategy in conserving biodiversity, and there is a pressing need to evaluate their social impacts. Though the social impacts of development interventions are widely assessed, the conservation literature is limited and methodological guidance is lacking. Using a systematic literature search, which found 95 relevant studies, we assessed the methods used to evaluate the social impacts of protected areas. Mixed methods were used by more than half of the studies. Almost all studies reported material aspects of wellbeing, particularly income; other aspects were included in around half of studies. The majority of studies provided a snapshot, with only one employing a before-after-control-intervention design. Half of studies reported respondent perceptions of impacts, while impact was attributed from researcher inference in 1/3 of cases. Although the number of such studies is increasing rapidly, there has been little change in the approaches used over the last 15 years, or in the authorship of studies, which is predominantly academics. Recent improvements in understanding of best practice in social impact evaluation need to be translated into practice if a true picture of the effects of conservation on local people is to be obtained

    A (3+1) resonance enhanced multiphoton ionization study of the C 1S+ and E 1P states of CO: polarization dependence used to probe electronic excitation routes and electronic character

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    The three-photon excitations of the C 1 + and E 1 states have been investigated with resonance enhanced multiphoton ionization spectroscopy as a function of the polarization of the excitation light. From the observed polarization dependence the contributions of the various excitation routes have been determined, and the electronic character of these states has been analyzed. The results indicate that the v=0 and 1 vibrational levels of the E 1 state have slightly different electronic characters. The Journal of Chemical Physics is copyrighted by The American Institute of Physics

    Adoption of innovative e-learning support for teaching: A multiple case study at the University of Waikato

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    In response to recent social, economic, and pedagogical challenges to tertiary-level teaching and learning, universities are increasingly investigating and adopting elearning as a way to engage and motivate students. This paper reports on the first year of a two-year (2009-2010) qualitative multiple case study research project in New Zealand. Using perspectives from activity theory and the scholarship of teaching, the research has the overall goal of documenting, developing, and disseminating effective and innovative practice in which e-learning plays an important role in tertiary teaching. A “snapshot” of each of the four 2009 cases and focused findings within and across cases are provided. This is followed by an overall discussion of the context, “within” and “across” case themes, and implications of the research

    Local moduli of holomorphic bundles

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    We study moduli of holomorphic vector bundles on non-compact varieties. We discuss filtrability and algebraicity of bundles and calculate dimensions of local moduli. As particularly interesting examples, we describe numerical invariants of bundles on some local Calabi-Yau threefolds.Comment: 18 pages. Revision history: v1: As submitted for publication. v2: minor corrections, as publishe

    Nanopositioning of a diamond nanocrystal containing a single NV defect center

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    Precise control over the position of a single quantum object is important for many experiments in quantum science and nanotechnology. We report on a technique for high-accuracy positioning of individual diamond nanocrystals. The positioning is done with a home-built nanomanipulator under real-time scanning electron imaging, yielding an accuracy of a few nanometers. This technique is applied to pick up, move and position a single NV defect center contained in a diamond nanocrystal. We verify that the unique optical and spin properties of the NV center are conserved by the positioning process.Comment: 3 pages, 3 figures; high-resolution version available at http://www.ns.tudelft.nl/q

    Saturation of Cs2 Photoassociation in an Optical Dipole Trap

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    We present studies of strong coupling in single-photon photoassociation of cesium dimers using an optical dipole trap. A thermodynamic model of the trap depletion dynamics is employed to extract absolute rate coefficents. From the dependence of the rate coefficient on the photoassociation laser intensity, we observe saturation of the photoassociation scattering probability at the unitarity limit in quantitative agreement with the theoretical model by Bohn and Julienne [Phys. Rev. A, 60, 414 (1999)]. Also the corresponding power broadening of the resonance width is measured. We could not observe an intensity dependent light shift in contrast to findings for lithium and rubidium, which is attributed to the absence of a p or d-wave shape resonance in cesium
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