695 research outputs found

    On the simulation of LC filters by active RC networks

    Get PDF
    Imperial Users onl

    Chapter 11--Private Party vs. Governments, Investor-State Dispute Settlement: Frankenstein or Safety Valve

    Get PDF
    Chapter 11 dispute settlement, NAFT

    Community economic development? An examination of regional and sub-regional support networks for social enterprise

    Get PDF
    The development of social enterprise as a potential tool to assist local and community economic development, has led to a range of debates specifically about the social and entrepreneurial values they exhibit. These debates have led to more theoretical questions about how social enterprise can transfer knowledge and best practice within and between local networks of association and how their successful outcomes should be measured. These issues have posed problems for many social enterprise support agencies and policy makers as they attempt to make sense of both support and development needs. Ultimately, these have led to a study about obtaining a better understanding of the support networks at regional and sub-regional levels, which are available for social enterprise. This has been done through a critical examination of contemporary policy documentation and research grounded in empirical investigation, about the development of the social economy, the effectiveness and construction of social enterprise support, how local economic development policy knowledges evolve and are shared and how social enterprise intersects and interacts within established socio-economic and socio-political systems. The thesis was undertaken between 2002 and 2008 and utilised a grounded theory approach to triangulate both qualitative and quantitative approaches to research principally through a national scoping survey and sub-regional interviews with social enterprise support providers and policy makers

    The study of ring-opening metathesis polymerisations of strained bicyclic monomers mediated by well-defined ruthenium complexes

    Get PDF
    When 7-alkoxynorbomadiene monomers are subjected to Ring-Opening Metathesis Polymerisations (ROMP) mediated by RuСІ(_2)(РСуз)(_2)(=СНРh) (A), regeneration of the initiator is observed. As the steric bulk of the 7-alkoxy functionality is decreased the extent of regeneration observed decreases accordingly (7-tert-butoxy: 27 %, 7- isopropoxy; 18 %, 7-ethoxy: 8 %, 7-methoxy: 3 %). The initial monomer to initiator ratio ([M]o/[I]o) was also found to effect the extent of regeneration. The ROMP of bicyclic olefin monomers containing oxygen functionality in positions other than the bridgehead carbon results in no regeneration of the initiator. Similarly, subtle variations to the chemistry of the ligands of initiator A result in no regeneration being observed, possibly due to the electronic effects of the ligands on the metal centre. Two propagating alkylidene species are apparent in Ή NMR spectra during the ROMP of monomer 1 mediated by initiator A, their identity is revealed by the addition of either free phosphine or a phosphine scavenger (CuCl) to the system once the polymerisation reaches completion. The resonance appearing as a triplet at 19.36 ppm is assigned to the alkylidene protons of bisphosphine species, whereas a broad resonance at -17.5 ppm is assigned to a monophosphine species in which oxygen contained within the propagating polymer backbone chelates to the ruthenium centre. The latter species is stable in solution and active for ROMP. Comparison are drawn between this species and КиСІ2(РСуз)(=СН-0-0- /-РгСбН4) (F), a stable ruthenium complex containing internal oxygen chelation, and NMR experiments reveal that they are similar in structure. The ligand exchange and ROMP behaviour of initiator F is also studied. A new methodology which permits the recovery of ruthenium alkylidene complexes from ROMP systems mediated by initiator A is described. The regenerated complexes are recovered in good yields and successfully employed in subsequent olefin metathesis reactions. This novel approach of induced regeneration is of significant interest due to the simple addition of terminating agents to ROMP reactions resulting in expensive non-recyclable ruthenium initiators being converted into cost effective recyclable catalysts

    How the Future Shaped the Past: The Case of the Cashless Society

    Get PDF
    This paper invites readers to look into how beliefs about future events help to better understand organizational change. Our argument is that the adoption of information technology and the adoption of new organizational forms around it have been driven by shifts in collective ideas of legitimate organizational development. As an example we focus on the establishment during the 1960s of a vision within US retail financial services, namely of the “cashless/checkless society”. The article tells of the power of this “imaginaire” to bring consensus in driving actual technological developments.imaginaires, expectations, isomorphism, cashless society, payment systems, USA

    Beam extrapolation and photosensor testing for the T2K experiment

    Get PDF
    Our understanding of the physics of neutrino oscillations has evolved rapidly over the past decade or so, with results from the SNO, Super-K, MINOS and CHOOZ experiments, among others, producing results favouring a three-neutrino mixing model, and significantly constraining the parameter space for this mixing. There are still several important questions to be answered however: we do not know whether Θ13 is non-zero, or whether (sin2 2Θ23) is maximal; also, we do not know the sign of the large mass splitting ΔM2, or whether CP-violation occurs in the lepton sector. The latter is possibly the most exciting of all - leptonic CP- violation is a requirement for leptogenesis, and could therefore indicate a solution to the matter-antimatter asymmetry problem in cosmology. The T2K long-baseline neutrino experiment is one of a new generation of neutrino projects, which will make more precise measurements of Θ13 and Θ23 than has been achieved by previous experiments. It uses the Super-K water Čerenkov detector at Kamioka as a far detector, and also has a suite of new near detectors. These are largely scintillator-based, but use a novel photosensor, the silicon photomultiplier (SiPM), for light readout. T2K has been leading the effort to understand and model these new sensors, and the present work will describe the current state-of-the-art in device characterisation, and also the effort to ensure the quality of the devices installed in the calorimeter of the ND280 near detector. An important part of a long-baseline analysis is the extrapolation of the neutrino flux measured at the near detector to predict that at the far detector. Methods to do this have been developed by previous experiments; however T2K uses an innovative configuration whereby the main detectors are displaced from the neutrino beam centre, removing much of the high-energy tail in the neutrino flux to reduce background from non-quasielastic events. This thesis evaluates the effectiveness of two extrapolation techniques, used by previous experiments, for the T2K configuration

    Issues in assessing students in the clinical workforce : an exploratory study

    Full text link
    The Monash Mini Case Record (MCR), based on Norcinis mini CEX, is an observed interaction between a student and a real patient in an authentic clinical setting. The assessor rates the students competence in history taking or physical examination and clinical reasoning on eight point scales. Professional / ethical behaviour within the encounter is evaluated on a four point scale. The assessor also grades the complexity of the case as low, medium or high. On completion of the student patient interaction, or her performance, and the assessor provides verbal and written feedback. Students complete both formative and summative MCRs across the academic year.<br /

    Solution Processing of Two-Dimensional Black Phosphorus

    Get PDF
    This feature article discusses solution-phase routes to semiconducting two-dimensional black phosphorus (‘phosphorene’) and highlights challenges in processing the material as well as illuminating new avenues and opportunities in the area.</p
    corecore