8,819 research outputs found
Interview with Rufus Gray in Haisla Kwakiutl, 26 July 1970. Track 1.
No full textFirst words on track: [Linguist]: "Why don't you tell me your name again for the record, the tape." [Speaker]: "Rufus Gray" [Linguist]: "And you were born in Kitamaat Village?" [Speaker]:"Yes." [Linguist]: "And you were born in 1907?". On CD case: "Haisla. Kwakiutl words and phrases. Tape 1 Side 1"
Parallel Imports and Music CD Prices
No full textParallel imports are a significant academic and policy issue. Official investigations into the impact of parallel imports on music CD prices have reached widely conflicting conclusions. This note reports an event study on an international panel of changes in copyright law to permit or disallow parallel imports. The study shows that, on average, legalization of parallel imports was associated with a 7.2–7.9% reduction in the retail price of music CDs.parallel imports, gray markets, price discrimination
Epithelial scatter factor and development of the chick embryonic axis.
No full textPerryman M., & Stoker M
Space-Doppler processing for multichannel ISAR imaging of non-cooperative targets embedded in strong clutter
No full textNon-cooperative moving targets appear defocussed in SAR images and the blurring effect due to the unknown motion leads to low detection capabilities. In this work, clutter suppression and ISAR processing are combined to obtain well focused images of extended non-cooperative moving targets embedded in strong clutter, by exploiting Multichannel SAR (M-SAR) systems. Clutter mitigation and radar motion compensation are performed by means of the proposed Space Doppler Adaptive Processing. Then ISAR processing is used to compensate the unknown target motion. Two principal issues will be addressed. First, a technique to apply ISAR processing after clutter mitigation is presented, and then a suboptimal approach for clutter mitigation is proposed to overcome computational and statistical issues associated with estimation of clutter cross-power spectral matrix. Results of the processing applied to simulated data are provided in order to show the effectiveness of the proposed techniques.Alessio Bacci, Douglas Gray, Marco Martorella, Fabrizio Berizz
CLEAN deconvolution for sidelobe suppression in random noise radar
No full textCopyright © 2008 IEEEThe term random noise radar (RNR) refers to a class of radar using random noise as its transmitted signal. Noise waveforms have proven useful in a number of radar applications; however, dynamic range performance suffers due to high range sidelobes. This paper investigates the use of the CLEAN deconvolution algorithm to suppress range sidelobes in noise radar. Simulation results are presented demonstrating the algorithms effectiveness, using both point and contiguous radar targets.Fry, R. D.; Gray, D. A
CD spectra of natural Bla g 2 (black line) and rBla g 2-N93Q (gray dashed).
No full text<p>CD spectra of natural Bla g 2 (black line) and rBla g 2-N93Q (gray dashed).</p
Cd-regulated gene expression in Datura innoxia
No full textThe effects of Cd on the expression of specific proteins and transcripts have been examined in Cd-resistant (Cd300) and Cd-sensitive cultures of Datura innoxia. 2D PAGE analysis of the soluble fraction of D. innoxia protein proved problematic. Proteins precipitated on the surface of lEF gels. This was overcome by loading the samples in the gel mixture prior to polymerisation. Polymerisation of gels containing protein extracted from Cd-exposed cells only occurred when PCs, Cd and other components were resolved from the proteins eluting in the void volume following fractionation by gel filtration chromatography (Sephadex G50). Two peptides, designated Cd-1 and Cd-2, were detected in the Cd300 cells only after exposure to Cd. Cd-1 and Cd-2 were also both detected following exposure of the Cd300 cells to 125 piM Cu or Zn, or HS (42 ˚C 4 h). Neither Cd-1 nor Cd-2 were observed in protein extracts from WDI cells exposed to 125 μM Cd for 8 h. Both Cd-1 and Cd-2 proved refractory to Edman degradation while the N-terminal 30 amino acids of a third, constitutively expressed protein, designated Protein-3, were determined using equivalent procedures. This protein showed sequence similarity to PR proteins. Although cleavage of Cd-1 and Cd-2 generated polypeptides which were not terminally blocked, no sequence information was obtained from these polypeptides, even following purification using standard techniques. Oligonucleotide primers designed from the amino acid sequence of Protein-3 were successfully used to amplify, from cDNA, a fragment which was cloned, sequenced and shown to encode the characterised protein. A longer fragment was also amplified from cDNA by RACE PGR. However, this product was not cloned. In order to identify cDNA sequences encoding Cd-1 and Cd-2 an expression cDNA library was prepared and antibodies raised against the two peptides. However, no antigenicity could be detected when antisera raised against Cd-1 or Cd-2, or the purified IgG fractions, were used to probe western blots. The XZAP cDNA (Cd-exposed) library was "differentially screened" in order to isolate clones corresponding to Cd-induced genes. This led to the isolation of two Cd- induced clones designated Cd-6 (949 bp) and Cd-8 (659 bp). Both clones hybridised to transcripts of approximately 900 bp. Transcripts were also detected in RNA samples extracted from D. innoxia exposed to HS (42 ˚C 4 h), however no transcripts were detected in WDI cells exposed to Cd. Southern blots revealed hybridisation to multiple bands, possibly indicating the presence of a gene family. A motif, C-C-X-C-C, found in the a-domain of metallothioneins, was identified in Cd-6. This may represent a putative metal binding site in Cd-6
Agricultural performance monitoring with dual-polarimetric terraSAR-X imagery
No full textThis paper presents an experiment for yield prediction using TerraSAR-X dual-polarimetric mode and precision agriculture machinery which records harvested amounts every few meters. The experimental field setup and data collection using TerraSAR-X are discussed and some preliminary results are shownD. Gray, T. Dhar, and C. Menge
MIMO noise radar - matched filters and coarrays
No full textCopyright © 2008 IEEEThe noise radar concept can be extended to an array of K transmit antenna and M receive antenna. When independent noise sources are transmitted from each antenna the approach may be viewed as a special case of MIMO radar and matched filters may be derived. In this contribution statistical properties of matched filters for MIMO noise radar are derived. For any array the concepts of the sum and difference coarrays are useful and important tools for understanding an arraypsilas beamforming properties particularly for sparse arrays. Element space matched filters are shown to be related to the concept of the sum coarray and some examples of the advantages of this for sparse transmit/receive array geometry are provided. A variation of this result for beam space matched filters is also presented.Douglas A Gray, Amerigo Capri
MIMO arrays and array shading
No full textA MIMO radar consisting of M transmit and N receive elements extracts MN signals using a matched filter bank. These signals can be considered as those received by a virtual array of MN elements. However, for many MIMO radar array geometries, multiple virtual array elements can exist at the same location. Therefore, an equivalent virtual array may consist of less than MN elements with some 'natural' weighting upon elements. Shading may be applied to the virtual array, incorporating the natural weights, to yield desired beampatterns. This paper investigates array shading for a range of MIMO radar array geometries. Robustness to element failure is also discussed.R.D. Fry, D.A. Gray and L.A. Balza
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