2,114 research outputs found

    Limits on the neutron-antineutron oscillation time from the stability of nuclei

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    We refute a recent claim by Nazaruk that the limits placed on the free--space neutron--antineutron oscillation time τnnˉ\tau_{{n\bar n}} can be improved by many orders of magnitude with respect to the estimate τnnˉ>2(T0/Γ)1/2\tau_{{n\bar n}}>2(T_0/\Gamma)^{1/2}, where T0T_0 is a measured limit on the annihilation lifetime of a nucleus and Γ∼100\Gamma\sim 100 MeV is a typical antineutron-nucleus annihilation width.Comment: 4 pages, Latex, submitted to Physics Letters

    Lessons from Learning the Craft of Theory-Driven Research

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    This article presents a case study of the structure and logic of the author’s dissertation, with a focus on theoretical content. Designed for use in proposal writing seminars or research methods courses, the article stresses the value of identifying the originating, specifying and subsidiary research questions; clarifying the subject and object of the research; situating research within a particular research tradition, and using a competing theories approach. The article stresses the need to identify conceptual problems and empirical problems and their associated conceptual and operational definitions. The primary theoretical perspective is drawn from emerging sociology of externalities rooted in ecological theory, within the institutionalist tradition

    The moment of microaggression: The experience of acts of oppression, dehumanization and exploitation

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    After a brief introduction and review of recent literature on microaggressions, a theoretical typology of three sources of social injustice (oppression, dehumanization, and exploitation) contributes to the theorization of the sources of microaggressions. A selected compendium of words and affective phrases generated in classroom exercises illustrates the nature of the experience of the moment of microaggression. Future research on microaggressions as well as evaluation of practice should examine the experience of microaggression, including being subjected to microaggression, initiating such acts, and observing such acts

    Neutron--Antineutron Oscillations at the Surface of Nuclei

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    We discuss some aspects of possible neutron--antineutron oscillations in nuclei. The phenomenon occurs mostly at the surface of nuclei, and hence {\sl i)} is not very sensitive to medium corrections and {\sl ii)} makes use of the antinucleon-nucleus interaction in a region probed by experiments at CERN.Comment: Contr. Oak Ridge Workshop on Workshop on Baryon Instability, Latex, 4 pages, comments to [email protected]

    Mutual information for examining correlations in DNA

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    This paper examines two methods for finding whether long-range correlations exist in DNA: a fractal measure and a mutual information technique. We evaluate the performance and implications of these methods in detail. In particular we explore their use comparing DNA sequences from a variety of sources. Using software for performing in silico mutations, we also consider evolutionary events leading to long range correlations and analyse these correlations using the techniques presented. Comparisons are made between these virtual sequences, randomly generated sequences, and real sequences. We also explore correlations in chromosomes from different species.Comment: 8 pages, 3 figure

    Theories of Human Injustice, Human Need, and Human Liberation [Figure]

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    On the determination of the pion effective mass in nuclei from pionic atoms

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    The binding energies of the deeply bound 1s and 2p states in pionic atoms of 207^{207}Pb, recently established experimentally in the 208^{208}Pb(d,3^3He) reaction, have been used by several groups to derive the pion effective mass in nuclear matter. We show that these binding energies are fully consistent with `normal' pionic atoms and that the real part of the pion-nucleus potential at the center of 207^{207}Pb is 28±\pm3 MeV and not 20 MeV as suggested previously.Comment: 8 pages, Revtex, 2 figures, accepted by Physics Letters

    Measuring the Integrative Impact of Managers, Entrepreneurs and Leaders in Sustaining innovation: A Tool for Customized Executive Education Programs

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    Three major decision-making archetypes exist in an organization: managers who focus mainly on the complexity of current issues, leaders who are responsible for facilitating change, and entrepreneurs who identify and develop opportunities. A measurement tool was designed (the MEL-Index) that allows a firm to assess the managerial, entrepreneurial and leadership capabilities of its key personnel as well as for the company as a whole. The current paper describes the application of the MEL-Index during an extended executive education program with a mid-sized German high-technology company. A one-hour face-to-face interview was conducted with 22 senior executives within two of the company’s business units. All participants provided a self-evaluation of their own MEL capabilities as well as a peer evaluation of their colleagues. In addition, they evaluated their current job, their own business unit and the entire company based on the MEL typologies. The MEL results were used as a diagnostic instrument where each participant received feedback in both written and graphic form. We show the examples of individual as well as the cumulative ratings for each of the business units. The executive education setting allowed for reflection on both individual and group scores. The response to the Tool has been overwhelmingly positive with the result that the remaining business units will complete the executive program, along with the embedded MEL process, over the next two years
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