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Search Results: 1 - 10 of 5151 matches for " Roger Bishop "
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Musical Expertise and the Ability to Imagine Loudness
Laura Bishop, Freya Bailes, Roger T. Dean
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0056052
Abstract: Most perceived parameters of sound (e.g. pitch, duration, timbre) can also be imagined in the absence of sound. These parameters are imagined more veridically by expert musicians than non-experts. Evidence for whether loudness is imagined, however, is conflicting. In music, the question of whether loudness is imagined is particularly relevant due to its role as a principal parameter of performance expression. This study addressed the hypothesis that the veridicality of imagined loudness improves with increasing musical expertise. Experts, novices and non-musicians imagined short passages of well-known classical music under two counterbalanced conditions: 1) while adjusting a slider to indicate imagined loudness of the music and 2) while tapping out the rhythm to indicate imagined timing. Subtests assessed music listening abilities and working memory span to determine whether these factors, also hypothesised to improve with increasing musical expertise, could account for imagery task performance. Similarity between each participant’s imagined and listening loudness profiles and reference recording intensity profiles was assessed using time series analysis and dynamic time warping. The results suggest a widespread ability to imagine the loudness of familiar music. The veridicality of imagined loudness tended to be greatest for the expert musicians, supporting the predicted relationship between musical expertise and musical imagery ability.
2,8-Dimethyltricyclo[,9]dodecane-syn-2,syn-8-diol–propanoic acid (1/1)
Yuji Mizobe,Roger Bishop,Donald C. Craig,Marcia L. Scudder
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809016547
Abstract: The racemic title compound, C14H24O2·C3H6O2, crystallizes in the monoclinic space group P21/c as a 1:1 diol/carboxylic acid cocrystal, A–B. The lattice incorporates infinite chains of the alcohol–carboxylic acid–alcohol supramolecular synthon, (...O—H...O=C(R)—O—H...O—H...), in which the hydrogen-bonded molecules (A—B—A)n surround a pseudo-threefold screw axis. The carboxylic acid group functions like an extended alcohol hydroxy group. Each diol, A, takes part in two such threefold screw arrangements, leading to a hydrogen-bonded layer structure, with adjacent layers containing diol molecules of opposite handedness. The central C atom of the propano bridge is disordered over two sites of occupancies 0.75 (1) and 0.25 (1). The methyl group of the propanoic acid molecule is disordered over two sites of occupancies 0.68 (1) and 0.32 (1).
Jason Ashmore,Roger Bishop,Donald C. Craig,Marcia L. Scudder
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807061235
Abstract: The racemic title compound, C27H26N2O4, crystallizes with its central carbon bridge on a twofold axis. It forms parallel chains of molecules utilizing aryl offset face–face interactions with an interplanar distance of about 3.5 . These chains associate further by means of pairs of O—CH2—H...π (with H–ring distances ranging from 2.69 to 2.95 ) and O—CH2—H...N motifs. The methoxy groups in this structure are coplanar with the aromatic rings to which they are attached. This is recognized as being common behaviour amongst aromatic methoxy compounds.
Paul D. Ahn,Roger Bishop,Donald C. Craig,Marcia L. Scudder
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809014408
Abstract: The achiral title compound, C6H4Cl2O2, crystallizes with O—H...O hydrogen bonding linking molecules into layers. Between layers there are chains of Cl...Cl...Cl interactions with alternating distances of 3.274 (2) and 3.742 (2) . Augmenting this arrangement there are also C—H...Cl (2.97 and 3.17 ) and Cl...π (shortest distances 3.40 and 3.54 ) interactions.
Paul D. Ahn,Roger Bishop,Donald C. Craig,Marcia L. Scudder
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809004310
Abstract: The achiral planar (maximum deviation 0.014 ) title compound, C10H6Cl2O2, crystallizes in the chiral space group P212121 in an arrangement incorporating conventional O—H...O hydrogen bonding leading to a supramolecular chain.
Vi T. Nguyen,Roger Bishop,Donald C. Craig,Marcia L. Scudder
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809009933
Abstract: The racemic title compound, C23H28O2, crystallizes in the space group C2/c as a layered structure in which a centrosymmetric three hydrogen bond sequence links four molecules. Both hydroxy groups are involved in this arrangement, but they differ in that one participates in two hydrogen bonds while the other takes part in only one. Between layers, the aromatic rings take part in edge-face interactions [shortest C—H...C distances 3.04, 3.10 and 3.12 and angle between normal to planes 86.7(2)°], forming a centrosymmetric dimer. The lattice is further stabilized by C—H...π interactions involving both methyl (shortest C...C 3.82 and 3.97 ) and methylene (shortest C...C 3.60 ) groups.
7α,15α-Dibromo-8,16-diphenyl-6,7,14,15-tetrahydro-6α,14α-epithiocycloocta[1,2-b:5,6-b′]diquinoline deuterochloroform solvate
Isa Y. H. Chan,Roger Bishop,Donald C. Craig,Mohan M. Bhadbhade
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809032978
Abstract: In the racemic title compound, C34H22Br2N2S·CDCl3, pairs of diquinoline host molecules form centrosymmetric brick-like dimers utilizing three different aryl edge-to-face interactions (EF1–3). The dimeric (EF)6 (i.e. 2 × EF1–3) building blocks pack with the deuterochloroform guest molecules positioned near each of their corners. The Cl atoms of the latter are disordered over two sets of sites in a 0.53 (2):0.47 (2) ratio.
Isa Y. H. Chan,Roger Bishop,Donald C. Craig,Marcia L. Scudder
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808009677
Abstract: The title compound, C14H20O2, crystallizes with homochiral chains of molecules hydrogen bonded together along the b axis. Adjacent chains in the ab plane contain molecules of the same chirality, leading to a chiral segregation of the molecules into layers.
Whole genome sequencing of phage resistant Bacillus anthracis mutants reveals an essential role for cell surface anchoring protein CsaB in phage AP50c adsorption
Bishop-Lilly Kimberly A,Plaut Roger D,Chen Peter E,Akmal Arya
Virology Journal , 2012, DOI: 10.1186/1743-422x-9-246
Abstract: Background Spontaneous Bacillus anthracis mutants resistant to infection by phage AP50c (AP50R) exhibit a mucoid colony phenotype and secrete an extracellular matrix. Methods Here we utilized a Roche/454-based whole genome sequencing approach to identify mutations that are candidates for conferring AP50c phage resistance, followed by genetic deletion and complementation studies to validate the whole genome sequence data and demonstrate that the implicated gene is necessary for AP50c phage infection. Results Using whole genome sequence data, we mapped the relevant mutations in six AP50R strains to csaB. Eleven additional spontaneous mutants, isolated in two different genetic backgrounds, were screened by PCR followed by Sanger sequencing of the csaB gene. In each spontaneous mutant, we found either a non-synonymous substitution, a nonsense mutation, or a frame-shift mutation caused by single nucleotide polymorphisms or a 5 base pair insertion in csaB. All together, 5 and 12 of the 17 spontaneous mutations are predicted to yield altered full length and truncated CsaB proteins respectively. As expected from these results, a targeted deletion or frame-shift mutations introduced into csaB in a different genetic background, in a strain not exposed to AP50c, resulted in a phage resistant phenotype. Also, substitution of a highly conserved histidine residue with an alanine residue (H270A) in CsaB resulted in phage resistance, suggesting that a functional CsaB is necessary for phage sensitivity. Conversely, introduction of the wild type allele of csaB in cis into the csaB deletion mutant by homologous recombination or supplying the wild type CsaB protein in trans from a plasmid restored phage sensitivity. The csaB mutants accumulated cell wall material and appeared to have a defective S-layer, whereas these phenotypes were reverted in the complemented strains. Conclusions Taken together, these data suggest an essential role for csaB in AP50c phage infection, most likely in phage adsorption. (The whole genome sequences generated from this study have been submitted to GenBank under SRA project ID: SRA023659.1 and sample IDs: AP50 R1: SRS113675.1, AP50 R2: SRS113676.1, AP50 R3: SRS113728.1, AP50 R4: SRS113733.1, AP50 R6: SRS113734.1, JB220 Parent: SRS150209.1, JB220 Mutant: SRS150211.1).
The Exact Similarity between the Positron and the Electron Equations in a P and the T Violations  [PDF]
Roger Boudet
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.38101
Abstract: Using in CPT a P and T violations we show that the equation of the positron is exactly the same as the one of the electron, on the condition that both the sign of the charge and the electromagnetic potential are changed. As a consequence the velocities are both in direction to the future and the masses are both positive and, in similar experiences, the behaviours of the two particles are the same. These theoretical results are in quite agreements with the experiments of the LEP.
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