Rumble in the jungle: city, place, and uncanny bass

While bass powerfully resonates among the cultural discourses, lexicology and marketing of a range of electronic dance music (EDM) styles, little popular music scholarship has paid attention to the subjective, phenomenological and psychophysiological significance of bass in its modulation of intense feelings of pleasure. This article examines the linking in jungle/drum ‘n’ bass culture of bass as a sonic space that produces a powerful sense of jouissance where identity can seem to unravel on the dance floor and an articulation of contemporary urban space as a place of subjective loss and regression. Overlaying Freud’s notion of the uncanny and Kristeva’s signifying space of the chora, I discuss how this fetishisation of bass can be linked to the music’s cultural formation from deindustrialised regions in London and the South-East of England during the early-1990s; its accelerated break-beats and “dark” bass-lines can be seen to inscribe recent rapid social, cultural and environmental transformations in the urban metropolis

Bring the Break-beat Back! Authenticity and the politics of rhythm in drum & bass

This article focuses on the critical divergences between rhythm and repetition in contemporary drum ‘n’ bass music in three key ways. First, it shows how the characteristic “chopping” and acceleration of sampled break-beats emphasises continuity with the past, thereby placing the genre in a continuum of Black Atlantic cultural practice that articulates historical recuperation as a political priority, while signifying the discontinuity of time in an accelerated culture. Secondly, it addresses the persistent use of live break-beats as an impulse within the genre to emphasise competing discourses of authenticity in the context of Black Atlantic cultural memory. Thirdly, having examined the embodied performativity valorised in the sampling of live break-beats, the article shows how the critical valuation of rhythmic characteristics can function as a catalyst of genre mutation and sub-genre development in drum ‘n’ bass and other electronic dance music genres

Spherically symmetric perfect fluid in area-radial coordinates

We study the spherically symmetric collapse of a perfect fluid using area-radial coordinates. We show that analytic mass functions describe a static regular centre in these coordinates. In this case, a central singularity can not be realized without an infinite discontinuity in the central density. We construct mass functions involving fluid dynamics at the centre and investigate the relationship between those and the nature of the singularities.Comment: Accepted by CQG. LaTex file, 14 pages, no figure

The Geochemistry of podiform chromite deposits from two ophiolite complexes, Chalkidiki peninsula, Northern Greece

The geochemistry of various petrological units from two mafic-ultramafic complexes, from the Chalkidiki peninsula have been studied. These complexes have been tectonically incorporated into the metamorphic country rocks, forming allochtonous bodies bounded by thrust zones. Chromite deposits occur in both complexes. They are highly sheared in the Gomati complex but grade to host dunite in the Vavdos complex. Major oxide contents and trace element abundances have been determined by X-ray fluorescence spectrometry, mineral analyses have been made by electron microprobe. Data on chromite from both complexes reveal that the chromite ores are of metallurgical type in the Wades complex and of refractory type at Gomati. The genetic model proposed relates to extraction of basaltic melt from depleted upper mantle material and its subsequent fractional crystallization. Podiform chromites are an early product of the crystallization of such a basaltic melt. They are intimately associated with a dunite host rock. The structures of the petrological1y different rock units, suggest formation through processes involving an original magmatic environment. This is reinforced by trends for particular minerals in the Vavdos complex. In the Gomati complex, the rocks are extensively serpentinized although various rock types can still be recognized. Amphibolites, at the contacts to the country rocks, show similarities to ocean floor basaltic extrusives. The two mafic-ultramafic have been interpreted as ophiolitic complexes, generated in small ocean basins or maginal seas, and emplaced inot the crust during the Mesozoic

Decay of the Maxwell field on the Schwarzschild manifold

We study solutions of the decoupled Maxwell equations in the exterior region of a Schwarzschild black hole. In stationary regions, where the Schwarzschild coordinate $r$ ranges over $2M < r_1 < r < r_2$, we obtain a decay rate of $t^{-1}$ for all components of the Maxwell field. We use vector field methods and do not require a spherical harmonic decomposition. In outgoing regions, where the Regge-Wheeler tortoise coordinate is large, $r_*>\epsilon t$, we obtain decay for the null components with rates of $|\phi_+| \sim |\alpha| < C r^{-5/2}$, $|\phi_0| \sim |\rho| + |\sigma| < C r^{-2} |t-r_*|^{-1/2}$, and $|\phi_{-1}| \sim |\underline{\alpha}| < C r^{-1} |t-r_*|^{-1}$. Along the event horizon and in ingoing regions, where $r_*<0$, and when $t+r_*1$, all components (normalized with respect to an ingoing null basis) decay at a rate of C \uout^{-1} with \uout=t+r_* in the exterior region.Comment: 37 pages, 5 figure

On the electromagnetic scattering from infinite rectangular conducting grids

The study and development of two numerical techniques for the analysis of electromagnetic scattering from a rectangular wire mesh are described. Both techniques follow from one basic formulation and they are both solved in the spectral domain. These techniques were developed as a result of an investigation towards more efficient numerical computation for mesh scattering. These techniques are efficient for the following reasons: (a1) make use of the Fast Fourier Transform; (b2) they avoid any convolution problems by converting integrodifferential equations into algebraic equations; and (c3) they do not require inversions of any matrices. The first method, the SIT or Spectral Iteration Technique, is applied for regions where the spacing between wires is not less than two wavelengths. The second method, the SDCG or Spectral Domain Conjugate Gradient approach, can be used for any spacing between adjacent wires. A study of electromagnetic wave properties, such as reflection coefficient, induced currents and aperture fields, as functions of frequency, angle of incidence, polarization and thickness of wires is presented. Examples and comparisons or results with other methods are also included to support the validity of the new algorithms

Computer prediction of dual reflector antenna radiation properties

A program for calculating radiation patterns for reflector antennas with either smooth analytic surfaces or with surfaces composed of a number of panels. Techniques based on the geometrical optics (GO) approach were used in tracing rays over the following regions: from a feed antenna to the first reflector surface (subreflector); from this reflector to a larger reflector surface (main reflector); and from the main reflector to a mathematical plane (aperture plane) in front of the main reflector. The equations of GO were also used to calculate the reflected field components for each ray making use of the feed radiation pattern and the parameters defining the surfaces of the two reflectors. These resulting fields form an aperture distribution which is integrated numerically to compute the radiation pattern for a specified set of angles