Personhood in a Communitarian Context

Theories regarding the nature and achievement of personhood in a communitarian context appear to differ in significant respects in the writings of several contemporary African philosophers. Ifeanyi Menkiti seems to regard ethnic differences as sufficient to warrant a national accommodation of multiculturalism with respect to moralities and attendant beliefs. Kwasi Wiredu argues that there is a substantive universal moral principle that undercuts such apparent and relatively superficial diversity. Communitarianism also seems to provide a better framework for explaining how a human being becomes a person than classical liberal theory as enunciated by someone like John Rawls. KeywordsCommunitarianism, liberalism, multiculturalism, personhood, Masolo, Menkiti, Rawls, Wired

“Ethnophilosophy” Redefined?

The meaning of the term “ethnophilosophy” has evolved in both a significant and controversial variety of ways since it was first introduced by Paulin Hountondji in 1970. It was first challenged by the Kenyan philosopher, H. Odera Oruka, as based upon Hountondji’s unfair appreciation of Africa’s indigenous cultural heritage. Barry Hallen and J. Olubi Sodipo, using a form of analytic philosophy as foundational, thereafter argued that Yoruba ordinary language discourse also served to undermine Hountondji’s critique. The later work of the Ghanaian philosopher, Kwame Gyekye, and the Kenyan D. A. Masolo have further legitimized the epistemological status of elements of African culture that once would have been labeled as of no genuine philosophical significance because they were ‘ethnophilosophical’ in character. The end result of this debate seems to be that both the form and content of philosophy in culture generally must be relativized. The most significant consequence of this would be that African and non-Western philosophy generally would finally be culturally liberated from the oppressive influence, indeed dominance, of what has conventionally come to be known as ‘mainstream’ (Western) philosophy

Melting and transverse depinning of driven vortex lattices in the periodic pinning of Josephson junction arrays

We study the non-equilibrium dynamical regimes of a moving vortex lattice in the periodic pinning of a Josephson junction array (JJA) for {\it finite temperatures} in the case of a fractional or submatching field. We obtain a phase diagram for the current driven JJA as a function of the driving current I and temperature T. We find that when the vortex lattice is driven by a current, the depinning transition at $T_p(I)$ and the melting transition at $T_M(I)$ become separated even for a field for which they coincide in equilibrium. We also distinguish between the depinning of the vortex lattice in the direction of the current drive, and the {\it transverse depinning} in the direction perpendicular to the drive. The transverse depinning corresponds to the onset of transverse resistance in a moving vortex lattice at a given temperature $T_{tr}$. For driving currents above the critical current we find that the moving vortex lattice has first a transverse depinning transition at low T, and later a melting transition at a higher temperature, $T_{M}>T_{tr}$.Comment: 17 pages, 19 figure

Biblical Citations as a Stylistic Standard in Johnson’s and Webster’s Dictionaries

Noah Webster’s primary source for the first edition of the 1828 American Dictionary of the English Language (ADEL) was Samuel Johnson’s 1799 eighth edition of the Dictionary of the English Language (DEL). Scholars have made much of the debt that Webster owes to Johnson for entries in the 1828 ADEL. Stylistic analyses have typically focused on the definitions included in the two dictionaries. Far less attention has been paid to the illustrative quotations employed by both authors to exemplify usage. This article focuses on Biblical citations in the letter S used by both Johnson and Webster as examples of usage. All citations (both secular and Biblical) under the letter S were examined to determine the relative importance of the Bible to the style and content of the dictionaries. Results indicate that though Johnson included more Biblical citations than Webster did, Biblical citations made up a larger proportion of Webster’s total citations than they did for Johnson.In addition to ascertaining frequency of Biblical citations, all Biblical citations shared by both dictionaries were also identified. Results of this analysis confirmed Webster’s debt to Johnson, as a great number of Webster’s Biblical citations may be found in Johnson’s dictionary. A study of the religious convictions of Johnson and Webster is integral to understanding both authors’ motivations in constructing their dictionaries. Though both were pious men, Johnson’s focus on the Bible was as a great literary work, whereas Webster’s focus on the Bible was as a tool for the religious and moral betterment of his readers.Les sources primaries utilisées par Noah Webster pour la première édition de son American Dictionary of the English Language (ADEL) publié en 1828 étaient la huitième édition du Dictionary of the English Language (DEL) de Samuel Johnson, publié en 1799. La dette de Webster envers Johnson concernant les entrées d’ADEL en 1828 a été mentionnée à plusieurs reprises par les chercheurs. Les analyses stylistiques se sont essentiellement portées sur les définitions dans les deux dictionnaires. Mais il a rarement été fait mention des citations utilisées par les deux auteurs comme exemples ou illustrations. Cet article porte sur les citations pour les mots commençant par la lettre S, utilisées aussi bien par Johnson que Webster à titre d’exemples. Nous avons étudié toutes les citations (aussi bien bibliques que non bibliques) utilisées pour les mots commençant par la lettre S afin de déterminer l’importance relative de la Bible sur le style et le contenu des dictionnaires. Les résultats indiquent que bien que Johnson ait utilisé plus de citations de la Bible que Webster, les citations bibliques forment une proportion plus importante des citations totales de Webster.Toutes les citations bibliques communes aux deux dictionnaires ont non seulement été identifiées, mais nous avons également établi leur fréquence d’usage. Les résultats de cette analyse ont confirmé la dette de Webster envers Johnson, puisqu’un grand nombre de citations bibliques utilisées par Webster se trouvent dans le dictionnaire de Johnson. La prise en compte des convictions religieuses de Johnson et de Webster fait partie intégrante de la compréhension des motivations des deux auteurs en ce qui concerne leurs choix lexicographiques. Bien que les deux fussent croyants, Johnson voyait la Bible comme une œuvre littéraire remarquable, alors que Webster la voyait comme un moyen d’élévation religieuse et morale de ses lecteurs

Search for Prompt Neutrino Emission from Gamma-Ray Bursts with IceCube

We present constraints derived from a search of four years of IceCube data for a prompt neutrino flux from gamma-ray bursts (GRBs). A single low-significance neutrino, compatible with the atmospheric neutrino background, was found in coincidence with one of the 506 observed bursts. Although GRBs have been proposed as candidate sources for ultra-high energy cosmic rays, our limits on the neutrino flux disfavor much of the parameter space for the latest models. We also find that no more than $\sim1\%$ of the recently observed astrophysical neutrino flux consists of prompt emission from GRBs that are potentially observable by existing satellites.Comment: 15 pages, 3 figure

Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data

A search for high-energy neutrinos interacting within the IceCube detector between 2010 and 2012 provided the first evidence for a high-energy neutrino flux of extraterrestrial origin. Results from an analysis using the same methods with a third year (2012-2013) of data from the complete IceCube detector are consistent with the previously reported astrophysical flux in the 100 TeV - PeV range at the level of $10^{-8}\, \mathrm{GeV}\, \mathrm{cm}^{-2}\, \mathrm{s}^{-1}\, \mathrm{sr}^{-1}$ per flavor and reject a purely atmospheric explanation for the combined 3-year data at $5.7 \sigma$. The data are consistent with expectations for equal fluxes of all three neutrino flavors and with isotropic arrival directions, suggesting either numerous or spatially extended sources. The three-year dataset, with a livetime of 988 days, contains a total of 37 neutrino candidate events with deposited energies ranging from 30 to 2000 TeV. The 2000 TeV event is the highest-energy neutrino interaction ever observed.Comment: 8 pages, 5 figures. Accepted by PRL. The event catalog, event displays, and other data tables are included after the final page of the article. Changed from the initial submission to reflect referee comments, expanding the section on atmospheric backgrounds, and fixes offsets of up to 0.9 seconds in reported event times. Address correspondence to: J. Feintzeig, C. Kopper, N. Whitehor

Search for a diffuse flux of astrophysical muon neutrinos with the IceCube 59-string configuration

A search for high-energy neutrinos was performed using data collected by the IceCube Neutrino Observatory from May 2009 to May 2010, when the array was running in its 59-string configuration. The data sample was optimized to contain muon neutrino induced events with a background contamination of atmospheric muons of less than 1%. These data, which are dominated by atmospheric neutrinos, are analyzed with a global likelihood fit to search for possible contributions of prompt atmospheric and astrophysical neutrinos, neither of which have yet been identified. Such signals are expected to follow a harder energy spectrum than conventional atmospheric neutrinos. In addition, the zenith angle distribution differs for astrophysical and atmospheric signals. A global fit of the reconstructed energies and directions of observed events is performed, including possible neutrino flux contributions for an astrophysical signal and atmospheric backgrounds as well as systematic uncertainties of the experiment and theoretical predictions. The best fit yields an astrophysical signal flux for nu(mu) + (nu) over bar (mu) of E-2. Phi(E) = 0.25 x 10(-8) GeV cm(-2) s(-1) sr(-1), and a zero prompt component. Although the sensitivity of this analysis for astrophysical neutrinos surpasses the Waxman and Bahcall upper bound, the experimental limit at 90% confidence level is a factor of 1.5 above at a flux of E-2 . Phi(E) = 1.44 x 10(-8) GeV cm(-2) s(-1) sr(-1)

Atmospheric and Astrophysical Neutrinos above 1 TeV Interacting in IceCube

The IceCube Neutrino Observatory was designed primarily to search for high-energy (TeV--PeV) neutrinos produced in distant astrophysical objects. A search for $\gtrsim 100$~TeV neutrinos interacting inside the instrumented volume has recently provided evidence for an isotropic flux of such neutrinos. At lower energies, IceCube collects large numbers of neutrinos from the weak decays of mesons in cosmic-ray air showers. Here we present the results of a search for neutrino interactions inside IceCube's instrumented volume between 1~TeV and 1~PeV in 641 days of data taken from 2010--2012, lowering the energy threshold for neutrinos from the southern sky below 10 TeV for the first time, far below the threshold of the previous high-energy analysis. Astrophysical neutrinos remain the dominant component in the southern sky down to 10 TeV. From these data we derive new constraints on the diffuse astrophysical neutrino spectrum, $\Phi_{\nu} = 2.06^{+0.4}_{-0.3} \times 10^{-18} \left({E_{\nu}}/{10^5 \,\, \rm{GeV}} \right)^{-2.46 \pm 0.12} {\rm {GeV^{-1} \, cm^{-2} \, sr^{-1} \, s^{-1}} }$, as well as the strongest upper limit yet on the flux of neutrinos from charmed-meson decay in the atmosphere, 1.52 times the benchmark theoretical prediction used in previous IceCube results at 90\% confidence.Comment: 18 pages, 12 figure

Spatio-temporal dynamics and plastic flow of vortices in superconductors with periodic arrays of pinning sites

We present simulations of flux-gradient-driven superconducting rigid vortices interacting with square and triangular arrays of columnar pinning sites in an increasing external magnetic field. These simulations allow us to quantitatively relate spatio-temporal microscopic information of the vortex lattice with typically measured macroscopic quantities, such as the magnetization $M(H)$. The flux lattice does not become completely commensurate with the pinning sites throughout the sample at the magnetization matching peaks, but forms a commensurate lattice in a region close to the edge of the sample. Matching fields related to unstable vortex configurations do not produce peaks in $M(H)$. We observe a variety of evolving complex flux profiles, including flat terraces or plateaus separated by winding current-carrying strings and, near the peaks in $M(H)$, plateaus only in certain regions, which move through the sample as the field increases