Commentary on the Portfolio of Compositions submitted for the degree of Doctor of Philosophy by Composition

John Goodenough Doctor of Philosophy by Composition Durham University Department of Music 2014 Portfolio Contents 1. Ubi Caritas 2009 - for Violin & Piano 4.36 2. String Quartet 2010 - for String Quartet 5.15 3. Echoes of Poems & Prose 2010 - for small ensemble 32.45 4. Fountains 2011 - for String Quartet 4.45 5. Stato di Cambiamento 2012 - for large ensemble 5.10 6. Triptych 2012 - for small ensemble 5.20 7. Divergenza 2013 - for large orchestra 33.12 Total time 91.03 Other musical examples (not part of the portfolio) Sette archi spezzati 2013 - for small ensemble 5.28 This portfolio has three principal themes. The first, explored with the discussion of Ubi Caritas and the (2010) String Quartet, concerns the interpretation of harmony; that is harmony, plainly being the vertical component in music but having an inbuilt propensity for horizontal movement, including line and counterpoint. In echoes of Poems & Prose, there is a disregard for any horizontal reasoning, harmony is constrained to the point of isolation and focus fundamentally shifts to the chord as 'object'. I consider this 'objective' sense in detail, in subsequent music in this portfolio. A second theme hinges on a discussion of 'musical material' (the term devised by Theodor Adorno); this considered alongside Samuel Beckett's description of a relationship, between 'mess and confusion' (Beckett's terms for material) and the 'form' that contains it. In Echoes of Poems & Prose, I consider material explicitly, in particular the singular sound. With Fountains and Stato di Cambiamento control of the sounds and their overall architecture become increasingly obscure, with issues around form, substantively re-defining the compositional process. A third theme is the consideration of aspects of structure, which become of particular significance in the final pieces Triptych and Divergenza (the term 'structure' being as defined by John Cage). In Triptych, exploration is made of a confining form into which structural material grows; material that yields intensely colourful musical moments. In the final piece Divergenza, the Fibonacci sequence applies a vice-like grip on the material, but as I remove the conceptual dependence on this sequence, the music's intrinsic characteristics of rhythm and character grow to become of central importance

Charge Asymmetric Cosmic Ray Signals From Dark Matter Decay

The PAMELA and Fermi measurements of the cosmic-ray electron and positron spectra have generated much interest over the past two years, because they are consistent with a significant component of the electron and positron fluxes between 20 GeV and 1 TeV being produced through dark matter annihilation or decay. However, since the measurements are also consistent with astrophysical interpretations, the message is unclear. In this paper, we point out that dark matter can have a more distinct signal in cosmic rays, that of a charge asymmetry. Such charge asymmetry can result if the dark matter's abundance is due to a relic asymmetry, allowing its decay to generate an asymmetry in positrons and electrons. This is analogous to the baryon asymmetry, where decaying neutrons produce electrons and not positrons. We explore benchmark scenarios where the dark matter decays into a leptophilic charged Higgs boson or electroweak gauge bosons. These models have observable signals in gamma rays and neutrinos, which can be tested by Fermi and IceCube. The most powerful test will be at AMS-02, given its ability to distinguish electron and positron charge above 100 GeV. Specifically, an asymmetry favoring positrons typically predicts a larger positron ratio and a harder (softer) high energy spectrum for positrons (electrons) than charge symmetric sources. We end with a brief discussion on how such scenarios differ from the leading astrophysical explanations.Comment: 8 pages, 11 figures, revtex; v2, additional references adde

User oriented ERTS-1 images

Photographic reproduction of ERTS-1 images are capable of displaying only a portion of the total information available from the multispectral scanner. Methods are being developed to generate ERTS-1 images oriented towards special users such as agriculturists, foresters, and hydrologists by applying image enhancement techniques and interactive statistical classification schemes. Spatial boundaries and linear features can be emphasized and delineated using simple filters. Linear and nonlinear transformations can be applied to the spectral data to emphasize certain ground information. An automatic classification scheme was developed to identify particular ground cover classes such as fallow, grain, rape seed or various vegetation covers. The scheme applies the maximum likelihood decision rule to the spectral information and classifies the ERTS-1 image on a pixel by pixel basis. Preliminary results indicate that the classifier has limited success in distinguishing crops, but is well adapted for identifying different types of vegetation

Cultural Replication Theory and Law

Does law itself evolve? It has been widely suggested that culturally transmitted behavioral information exhibits a Darwinian evolutionary dynamic. The argument is straightforward. Darwinian evolution has three basic elements: (i) replicative descent with (ii) variation, subject to (iii) a form of selection. Bundles of cultural information as diverse as language, religious practices, and how to bake bread pass with imperfect fidelity from generation to generation. Some of the variants created by these imperfections are passed, non-randomly, to the next generation with greater frequency.

Ferromagnetism and orbital order in a topological ferroelectric

We explore via density functional calculations the magnetic doping of a topological ferroelectric as an unconventional route to multiferroicity. Vanadium doping of the layered perovskite La$_{2}$Ti$_{2}$O$_{7}$ largely preserves electric polarization and produces robust ferromagnetic order, hence proper multiferroicity. The marked tendency of dopants to cluster into chains results in an insulating character at generic doping. Ferromagnetism stems from the symmetry breaking of the multi-orbital V system via an unusual "antiferro"-orbital order, and from the host's low-symmetry layered structure.Comment: 4 pages, 3 figures; Physical Review Letters 109, in print (2012