2,211 research outputs found

    The Implementation of Intelligence-Led Policing in Mississippi

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    The attacks of 9/11 had a huge impact on the intelligence community, the federal government, state and local police departments, and every American citizen. For many law enforcement agencies, their daily operations have been greatly affected. The terrorist attacks made them realize that their estrangement from one another had to be eliminated in an effort to prevent future attacks. If agencies were to be successful they needed to better communicate, share information, assist each other, and become familiar with new policies and procedures. Those new procedures included the implementation of intelligence-led policing (ILP) - a proactive approach to crime prevention. The principle document of this new concept in the United States is the National Criminal Intelligence Sharing Plan (NCISP) which contains twenty-eight recommendations, each of which suggests ways to properly implement ILP in state and local police departments. These recommendations include increased communication between agencies of all levels, additional training and funding for agencies, and enhanced information sharing. However, debate remains as to whether ILP is part of a police officer\u27s routine and if the recommendations from the NCISP are being followed. To date, there have been few systematic studies that have explored these exact questions. With new and emerging threats to the United States, it is important that all levels of law enforcement work together to fight terrorism. In order to determine if ILP is being implemented in agencies in Mississippi, an anonymous survey was fielded to every state and local law enforcement agency in the state. Voluntary participants answered the survey in hard copy or online; a response rate of 47% was realized. In order to compare Mississippi to the rest of the United States, a survey was also fielded to the participants at the FBI National Academy in Quantico, Virginia. Data regarding the implementation of ILP were subjected to statistical analysis to determine the extent to which ILP has been implemented in Mississippi, how Mississippi compares to the rest of the United States, and what independent variables (agency size and agency type) affect the implementation of ILP

    Pressure distributions on three different cruciform aft-control surfaces of a wingless missile at Mach 1.60, 2.36, and 3.70. Volume 2: Clipped delta tail

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    Pressure coefficients were obtained in the Langley Unitary Plan wind tunnel for a wingless missile with a clipped delta tail. The angle of attack was varied from -4 deg to 20 deg, model roll angle was varied from 0 deg to 90 deg in 22.5 deg increments, and tail deflections were 0 deg to - 15 deg. The pressures were measured on two adjacent tail surfaces using 91 pressure orifices per tail surface. Results are presented in plotted and tabular form

    Pressure distributions on three different cruciform aft-tail control surfaces of a wingless missile at Mach 1.60, 2.36, and 3.70. Volume 3: Cranked tail

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    The results of pressure distribution tests are presented without analysis. The test Reynolds number used was 6.6. x 10 to the 6th power per meter

    Vapor-screen technique for flow visualization in the Langley Unitary Plan Wind Tunnel

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    The vapor-screen technique for flow visualization, as developed for the Langley Unitary Plan Wind Tunnel, is described with evaluations of light sources and photographic equipment. Test parameters including dew point, pressure, and temperature were varied to determine optimum conditions for obtaining high-quality vapor-screen photographs. The investigation was conducted in the supersonic speed range for Mach numbers from 1.47 to 4.63 at model angles of attack up to 35 deg. Vapor-screen photographs illustrating various flow patterns are presented for several missile and aircraft configurations. Examples of vapor-screen results that have contributed to the understanding of complex flow fields and provided a basis for the development of theoretical codes are presented with reference to other research

    [Ir]responsible leadership: addressing management and leadership curricula biases

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    Irresponsible leadership (IL) research vis-a-vis curricular development in management education receives a modicum of attention, particularly in comparison to responsible leadership (RL). At best, IL is embedded in topics such as leadership and management development, corporate social responsibility (CSR) or business ethics. The report problematizes IL embeddedness and examines irresponsible leader behaviors and practices, particularly through the lens of multinational corporations (MNCs) in the context of CSR/CSI (corporate social irresponsibility). IL is defined, and the authors argue for stand-alone IL courses in the management/leadership curricula, as embedding alone does very little to reflect the growing problems associated with IL behavior and practices. Hence, management curricula bias is addressed by emphasizing the criticality of IL education to improve RL understanding, pedagogy, and professional practices in work organizations. The authors adopt a bricolage philosophy which allows for ontological and epistemological flexibility, useful for investigating under-researched issues. The targeted audiences are people involved in management/leadership education, learning and development, including academics involved in curricula development studies, as well as management consultants, and HR partners. Key words: Irresponsible leadership, Responsible Leadership, HRM, Management, Curricula development, Higher Education, Corporate Social Responsibility, Corporate Social Irresponsibility, Sustainability Teaching and Learnin

    Highly Damped Quasinormal Modes and the Small Scale Structure of Quantum Corrected Black Hole Exteriors

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    Quasinormal modes provide valuable information about the structure of spacetime outside a black hole. There is also a conjectured relationship between the highly damped quasinormal modes and the semi-classical spectrum of the horizon area/entropy. In this paper, we show that for spacetimes characterized by more than one scale, the "infinitely damped" modes in principle probe the structure of spacetime outside the horizon at the shortest length scales. We demonstrate this with the calculation of the highly damped quasinormal modes of the non-singular, single horizon, quantum corrected black hole derived in [14].Comment: 32 pages, 7 figure

    Dependences of the Casimir-Polder interaction between an atom and a cavity wall on atomic and material properties

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    The Casimir-Polder and van der Waals interactions between an atom and a flat cavity wall are investigated under the influence of real conditions including the dynamic polarizability of the atom, actual conductivity of the wall material and nonzero temperature of the wall. The cases of different atoms near metal and dielectric walls are considered. It is shown that to obtain accurate results for the atom-wall interaction at short separations, one should use the complete tabulated optical data for the complex refractive index of the wall material and the accurate dynamic polarizability of an atom. At relatively large separations in the case of a metal wall, one may use the plasma model dielectric function to describe the dielectric properties of wall material. The obtained results are important for the theoretical interpretation of experiments on quantum reflection and Bose-Einstein condensation.Comment: 5 pages, 1 figure, iopart.cls is used, to appear in J. Phys. A (special issue: Proceedings of QFEXT05, Barcelona, Sept. 5-9, 2005

    High-resolution DCE-MRI of the pituitary gland using radial k-space acquisition with compressed sensing reconstruction

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    BACKGROUND AND PURPOSE: The pituitary gland is located outside of the blood-brain barrier. Dynamic T1 weighted contrast enhanced sequence is considered to be the gold standard to evaluate this region. However, it does not allow assessment of intrinsic permeability properties of the gland. Our aim was to demonstrate the utility of radial volumetric interpolated brain examination with the golden-angle radial sparse parallel technique to evaluate permeability characteristics of the individual components (anterior and posterior gland and the median eminence) of the pituitary gland and areas of differential enhancement and to optimize the study acquisition time. MATERIALS AND METHODS: A retrospective study was performed in 52 patients (group 1, 25 patients with normal pituitary glands; and group 2, 27 patients with a known diagnosis of microadenoma). Radial volumetric interpolated brain examination sequences with goldenangle radial sparse parallel technique were evaluated with an ROI-based method to obtain signal-time curves and permeability measures of individual normal structures within the pituitary gland and areas of differential enhancement. Statistical analyses were performed to assess differences in the permeability parameters of these individual regions and optimize the study acquisition time. RESULTS: Signal-time curves from the posterior pituitary gland and median eminence demonstrated a faster wash-in and time of maximum enhancement with a lower peak of enhancement compared with the anterior pituitary gland (P .005). Time-optimization analysis demonstrated that 120 seconds is ideal for dynamic pituitary gland evaluation. In the absence of a clinical history, differences in the signal-time curves allow easy distinction between a simple cyst and a microadenoma. CONCLUSIONS: This retrospective study confirms the ability of the golden-angle radial sparse parallel technique to evaluate the permeability characteristics of the pituitary gland and establishes 120 seconds as the ideal acquisition time for dynamic pituitary gland imaging

    Radiative association and inverse predissociation of oxygen atoms

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    The formation of \mbox{O}_2 by radiative association and by inverse predissociation of ground state oxygen atoms is studied using quantum-mechanical methods. Cross sections, emission spectra, and rate coefficients are presented and compared with prior experimental and theoretical results. At temperatures below 1000~K radiative association occurs by approach along the 1 3Πu1\,{}^3\Pi_u state of \mbox{O}_2 and above 1000~K inverse predissociation through the \mbox{B}\,{}^3\Sigma_u^- state is the dominant mechanism. This conclusion is supported by a quantitative comparison between the calculations and data obtained from hot oxygen plasma spectroscopy.Comment: submitted to Phys. Rev. A (Sept. 7., 1994), 19 pages, 4 figures, latex (revtex3.0 and epsf.sty
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