6,520 research outputs found

    Recent Market Events and The Foundation for Global Market Crises: A Lawyer\u27s Perspective

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    The future of management: The NASA paradigm

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    Prototypes of 21st century management, especially for large scale enterprises, may well be found within the aerospace industry. The space era inaugurated a number of projects of such scope and magnitude that another type of management had to be created to ensure successful achievement. The challenges will be not just in terms of technology and its management, but also human and cultural in dimension. Futurists, students of management, and those concerned with technological administration would do well to review the literature of emerging space management for its wider implications. NASA offers a paradigm, or demonstrated model, of future trends in the field of management at large. More research is needed on issues of leadership for Earth based project in space and space based programs with managers there. It is needed to realize that large scale technical enterprises, such as are undertaken in space, require a new form of management. NASA and other responsible agencies are urged to study excellence in space macromanagement, including the necessary multidisciplinary skills. Two recommended targets are the application of general living systems theory and macromanagement concepts for space stations in the 1990s

    Wisconsin Dairy Investment Credit

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    Agricultural and Food Policy, Livestock Production/Industries,

    Pileup Per Particle Identification

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    We propose a new method for pileup mitigation by implementing "pileup per particle identification" (PUPPI). For each particle we first define a local shape α\alpha which probes the collinear versus soft diffuse structure in the neighborhood of the particle. The former is indicative of particles originating from the hard scatter and the latter of particles originating from pileup interactions. The distribution of α\alpha for charged pileup, assumed as a proxy for all pileup, is used on an event-by-event basis to calculate a weight for each particle. The weights describe the degree to which particles are pileup-like and are used to rescale their four-momenta, superseding the need for jet-based corrections. Furthermore, the algorithm flexibly allows combination with other, possibly experimental, probabilistic information associated with particles such as vertexing and timing performance. We demonstrate the algorithm improves over existing methods by looking at jet pTp_T and jet mass. We also find an improvement on non-jet quantities like missing transverse energy.Comment: v2 - 23 pages, 10 figures; update to JHEP version, minor revisions throughout, results unchange

    Thinking outside the ROCs: Designing Decorrelated Taggers (DDT) for jet substructure

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    We explore the scale-dependence and correlations of jet substructure observables to improve upon existing techniques in the identification of highly Lorentz-boosted objects. Modified observables are designed to remove correlations from existing theoretically well-understood observables, providing practical advantages for experimental measurements and searches for new phenomena. We study such observables in WW jet tagging and provide recommendations for observables based on considerations beyond signal and background efficiencies

    Charles Coffin Harris: An Uncommon Life in the Law

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    Observation of high-lying resonances in the H- ion

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    This dissertation reports the observation of several series of resonances, for which both electrons are in excited states, in the photodetachment cross section of H-. These P doubly-excited states interfere with the continuum in which they are embedded, and appear as dips in the production cross section of excited neutral hydrogen. The experiment was performed by intersecting an 800 MeV H- beam with a (266 nm) laser beam at varying angles; the relativistic Doppler shift then \u27tuned\u27 the photon energy in the barycentric frame. The process was observed by using a magnet strong enough to strip the electrons from the excited hydrogen atoms in selected states n and detecting the resulting protons, which allowed the isolation of the individual n channels. Three resonances are clearly visible in each channel. The data support recent theoretical calculations for the positions of doubly excited \u27P resonances, and verify a new Rydberg-like formula for the modified Coulomb potential

    Snowmass White Paper: New flavors and rich structures in dark sectors

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    Dark matter can be part of a dark sector with non-minimal couplings to the Standard Model. Compared to many (minimal) benchmark models, such scenarios can result in significant modifications in experimental signatures and strongly impact experimental search sensitivity. In this white paper, we review several non-minimal dark sector models, including phenomenological consequences: models explaining (g−2)ÎŒ(g-2)_\mu, inelastic dark matter, strongly interacting massive particles as dark matter candidates, and axions with flavorful couplings. The present exclusions and projected experimental sensitivities on these example dark sector models illustrate the robustness of the growing dark sector experimental effort -- both the broadness and the precision of existing searches -- probing theoretically interesting parameter space. They also illustrate some of the unique complementarity of different experimental approaches.Comment: Contribution to Snowmass 202
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