A new record of Percursaria percursa (Ulvaceae, Ulvales) on the North Island, New Zealand

The filamentous green alga Percursaria percursa (Ulvaceae, Ulvales) was recorded for the first time on the North Island of New Zealand at mokoroa Estuary, Tauranga Harbour. This species is previously known within New Zealand from only two records, both from the South Island. In Tauranga Harbour, this species was restricted to anoxic estuarine sediments where mangrove forests had been mulched, and mulchate left in situ. Percursaria percursa was found intertwined with Ulva spp. and Rhizoclonium spp. Surveys of other North and South Island estuaries suggest that this alga, although occurring as part of nuisance green algal blooms in Tauranga Harbour, has only colonized human-impacted locations, and has not yet been observed in natural' estuarine ecosystems in New Zealand. As this species was found intertwined with other mat-forming filamentous green algae, it can easily be misidentified in the field, leading to both over- and under-reporting of species occurrence

Melodic improvisation on a twelve bar blues model : an investigation of physical and historical aspects and their contribution to performance

"Anything made by man, no matter how many varieties it assumes, and how much of the superhuman it seems to contain, must reveal its secret to the close observer." Paul Hindemith (1942: 176). "Are you one of those guys who wants to put crutches under my ass?" Lonnie Johnson (Keil 1966: 35). It is the aim of this thesis to define a musical genre by showing how, in the realisation of an improvisation, two key elements - the physical layout of a musical instrument and human movement patterns - are combined to produce music. This thesis takes as a model the twelve bar blues form, and examines the above aspects in the output of two pioneering figures of the melodic improvised guitar: Lonnie Johnson and T-Bone Walker. The thesis is in divided in to three sections; the first, which considers context, is divided in to four topics. • Identification of the model - the twelve bar blues form, and an examination of the meaning of the model to black culture. • Consideration of the role of geography on the emergent style • The guitar design and development. • Identification of the pioneering figures of the genre. The second section, which is concerned with musical, physical and analytical aspects, surveys theories of scale, mode, blues scale and blue notes, and suggests that blues improvisation is inextricably linked to spatio-motor based patterning. A geographical layout of the guitar is presented to aid in the analytical process. The third section is analytical and attempts to identify the melodic 'characteristics of the blues guitar genre. A series of transcriptions were made of improvisations of early blues guitar soloists. These are analysed by reduction and expansion. The tones produced in the improvisations were reduced to a modal hierarchy of principal, secondary and incidental tones which are presented on a fretboard form of notation. The resulting mode is reduced to a scale which is compared to theoretical definitions of blues scale. This raw data is then expanded by considering the left hand gestural movement between tones. gestures are seen to be linked together to form cells. These are sub-grouped in to various types. Larger structures, motives, are then defined as comprising several cells. The location of the cells in the model is indicated. These are categorised in groups for each performer.Thus improvisation is presented as an interaction, which takes place in time and space, between left hand movement strategies of the performer and the surface of a musical instrument

Numerical Portrait of a Relativistic Thin Film BCS Superfluid

We present results of numerical simulations of the 2+1d Nambu - Jona-Lasinio model with a non-zero baryon chemical potential mu including the effects of a diquark source term. Diquark condensates, susceptibilities and masses are measured as functions of source strength j. The results suggest that diquark condensation does not take place in the high density phase mu>mu_c, but rather that the condensate scales non-analytically with j implying a line of critical points and long range phase coherence. Analogies are drawn with the low temperature phase of the 2d XY model. The spectrum of the spin-1/2 sector is also studied yielding the quasiparticle dispersion relation. There is no evidence for a non-zero gap; rather the results are characteristic of a normal Fermi liquid with Fermi velocity less than that of light. We conclude that the high density phase of the model describes a relativistic gapless thin film BCS superfluid.Comment: 37 pages, 16 figure

Gauge/string duality and scalar glueball mass ratios

It has been shown by Polchinski and Strassler that the scaling of high energy QCD scattering amplitudes can be obtained from string theory. They considered an AdS slice as an approximation for the dual space of a confining gauge theory. Here we use this approximation to estimate in a very simple way the ratios of scalar glueball masses imposing Dirichlet boundary conditions on the string dilaton field. These ratios are in good agreement with the results in the literature. We also find that they do not depend on the size of the slice.Comment: 5 pages, no figures. References updated. Version published in JHE

Active Reduction of an Enclosed Sound Field: An Experimental Investigation

Many experimental investigations into the active control of sound have concentrated on the simplest sound field, a one dimensional wave propagating along a duct, where a simple control strategy can be used because cancellation at one point guarantees cancellation downstream of that point. A simple controller can be implemented by measuring the sound upstream with a unidirectional sensor and using a feedforward controller with a delay and phase inversion to drive the cancelling source...........

Semirigid Geometry

We provide an intrinsic description of $N$-super \RS s and $TN$-\SR\ surfaces. Semirigid surfaces occur naturally in the description of topological gravity as well as topological supergravity. We show that such surfaces are obtained by an integrable reduction of the structure group of a complex supermanifold. We also discuss the \s moduli spaces of $TN$-\SR\ surfaces and their relation to the moduli spaces of $N$-\s\ \RS s.Comment: 29p

Characterization of metabolites in infiltrating gliomas using ex vivo &supl;H high-resolution magic angle spinning spectroscopy.

Gliomas are routinely graded according to histopathological criteria established by the World Health Organization. Although this classification can be used to understand some of the variance in the clinical outcome of patients, there is still substantial heterogeneity within and between lesions of the same grade. This study evaluated image-guided tissue samples acquired from a large cohort of patients presenting with either new or recurrent gliomas of grades II-IV using ex vivo proton high-resolution magic angle spinning spectroscopy. The quantification of metabolite levels revealed several discrete profiles associated with primary glioma subtypes, as well as secondary subtypes that had undergone transformation to a higher grade at the time of recurrence. Statistical modeling further demonstrated that these metabolomic profiles could be differentially classified with respect to pathological grading and inter-grade conversions. Importantly, the myo-inositol to total choline index allowed for a separation of recurrent low-grade gliomas on different pathological trajectories, the heightened ratio of phosphocholine to glycerophosphocholine uniformly characterized several forms of glioblastoma multiforme, and the onco-metabolite D-2-hydroxyglutarate was shown to help distinguish secondary from primary grade IV glioma, as well as grade II and III from grade IV glioma. These data provide evidence that metabolite levels are of interest in the assessment of both intra-grade and intra-lesional malignancy. Such information could be used to enhance the diagnostic specificity of in vivo spectroscopy and to aid in the selection of the most appropriate therapy for individual patients

Religious perspectives on the use of psychopharmaceuticals as an enhancement technology

The use of psychopharmaceuticals as an enhancement technology has been the focus of attention in the bioethics literature. However, there has been little examination of the challenges that this practice creates for religious traditions that place importance on questions of being, authenticity and identity. We asked expert commentators from six major world religions to consider the issues raised by psychopharmaceuticals as an enhancement technology. These commentaries reveal that in assessing the appropriate place of medical therapies, religious traditions, like secular perspectives, rely upon ideas about health and disease and about normal human behavior. But unlike secular perspectives, faith traditions explicitly concern themselves with ways in which medicine should or should not be used to live a ‘good life’. KEYWORDS: Enhancement; bioethics, psychopharmacology, religio