8,025 research outputs found

    Experimentation and innovation in police reform: Timor-Leste, Solomon Islands and Bougainville

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    The plural character of policing provision in most countries is now widely acknowledged, though rarely reflected in the practical police reform programming undertaken by donors. While much of the literature on international police assistance focuses on its modest results and innate limitations, less attention has been paid to those still relatively rare programmes that have sought to engage with the local realities of plural policing. This is particularly so in the conflict-affected and fragile settings where such assistance is typically provided. In this article, we present three case studies of policing innovation and experimentation from Timor-Leste, Solomon Islands and Bougainville, respectively, set in the context of the recent and very different post-conflict interventions in each place. While not wishing to overstate the impact of these modest programmes, we highlight their potential contribution to fostering productive relations across the multiple social orders and sources of authority found in many post-colonial, post-conflict and otherwise fragile contexts. We tentatively conclude that the most significant contribution of these kinds of initiative is likely to lie beyond the realm of institutionalised policing and, specifically, in relation to larger processes of social and political change, including state formation, under way in these places

    Some problems of Maryland towns as seen by their mayors

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    Conversations were held with the mayors of six Maryland towns to discuss possible models and needs for technology transfer. An unexpected outcome of the discussions was a considerable insight into local problems as perceived by the mayors. Problems, whether administrative, socio-economic, or technological, are different, from town to town, in degree, not in kind. Recognition of this feature of local priorities is vital to any considerations of external assistance

    Upstream-radiated rotor–stator interaction noise in mean swirling flow

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    A major component of the noise in modern aeroengines is rotor–stator interaction noise generated when the wake from the rotating fan impinges on a stator row downstream. An analytically based model for the prediction of upstream-radiated rotor–stator interaction noise is described, and includes the important effect of mean swirling flow on both the rotor wake evolution and the acoustic response. The analytic nature of the model allows for the inclusion of all wake harmonics and enables the response at all blade passing frequencies to be determined. An asymptotic analysis based on large rotor blade number is used to model the evolution of the rotor wake downstream in a cylindrical duct carrying mean swirling flow. The equations governing the axial evolution of the wake simplify to three coupled first-order differential equations in the interior, while close to the duct walls, a boundary-layer correction is required in order to satisfy the impermeability conditions at the boundaries. At the stator location, the wake is used as input into a local linear cascade model at each radius. The interaction of each wake harmonic gives rise to acoustic waves of multiple azimuthal order which contribute to the pressure field radiated back upstream. This enables the total acoustic response to be determined in terms of cylindrical duct modes in mean swirling flow. The effect of stator blade geometry (thickness, camber, angle of attack) and rotor–stator separation on the total upstream-radiated noise is determined. Blade geometry is shown to have a significant effect on the noise generated, and increasing the rotor–stator gap can lead to large reductions in noise levels. Asymptotic treatment of the acoustic field, based on large azimuthal order, is also considered and used to identify the dominant contributions to the total pressure field resulting from the rotor–stator interaction. The ray structure of the acoustic modes in swirl is shown to be very different in some cases from that in uniform flow

    Getting the Most Bang for the Buck: An Analysis of States’ Relative Efficiencies in Promoting the Birth of Small Firms

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    Firm birth has recently been an important topic for many state governments. However, ways in which state governments can influence firm births are not obvious, and their efficiency in fostering firm births in comparison with their peers is even less so. Focusing on the birth of small U.S. firms, regression analysis and non-parametric efficiency testing are employed to determine both the expenditures state governments can target to promote firm birth and their relative efficiency in utilizing these expenditures. The relative efficiency tests provide insight as to how states compare with their peers in terms of efficient target expenditure use.

    Zero and low carbon buildings: A driver for change in working practices and the use of computer modelling and visualization

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    Buildings account for significant carbon dioxide emissions, both in construction and operation. Governments around the world are setting targets and legislating to reduce the carbon emissions related to the built environment. Challenges presented by increasingly rigorous standards for construction projects will mean a paradigm shift in how new buildings are designed and managed. This will lead to the need for computational modelling and visualization of buildings and their energy performance throughout the life-cycle of the building. This paper briefly outline how the UK government is planning to reduce carbon emissions for new buildings. It discusses the challenges faced by the architectural, construction and building management professions in adjusting to the proposed requirements for low or zero carbon buildings. It then outlines how software tools, including the use of visualization tools, could develop to support the designer, contractor and user

    Right-Financing Security Sector Reform

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    Security sector reform (SSR) in post-conflict environments encompasses a broad range of efforts to improve capacity, governance, performance, and sustainability. The fiscal implications of SSR decisions often are neglected, however. The negative consequences of this neglect include unsustainable reforms, the squeezing out of other vital sectors, and ultimately under-provision of security itself. This paper argues for a “right-financing” approach to SSR that strikes an appropriate balance between current needs and the goal of building a fiscally sustainable security sector. The paper offers four policy proposals: first, build fiscal dimensions of the security sector into peace agreements, post-conflict needs assessments, development strategies, and expenditure planning; second, align short-run policies with long-term budgetary realities; third, move to a “service-delivery” model based on provision of law-and-order and justice services to the citizens; and finally, strengthen international capacities to support these right-financing policies.Security sector reform; fiscal sustainability; service delivery

    Three-dimensional flows about simple components at angle of attack

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    The structures of three dimensional separated flow about some chosen aerodynamic components at angle of attack are synthesized, holding strictly to the notion that streamlines in the external flow (viscous plus inviscid) and skin friction lines on the body surface may be considered as trajectories having properties consistent with those of continuous vector fields. Singular points in the fields are of limited number and are classified as simple nodes and saddles. Analogous flow structures at high angles of attack about blunt and pointed bodies, straight and swept wings, etc., are discussed, highlighting the formation of spiral nodes (foci) in the pattern of the skin friction lines. How local and global three dimensional separation lines originate and form is addressed, and the characteristics of both symmetric and asymmetric leeward wakes are described
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