Accent Structures in Music Performance

1993 ◽  
Vol 10 (3) ◽  
pp. 343-378 ◽  
Author(s):  
Carolyn Drake ◽  
Caroline Palmer
Keyword(s):  
Music Performance ◽  
Complex Sequences ◽  
Accent Structure ◽  
Performance Variations ◽  
Musical Sequence

Perceptual studies suggest that the segmentation of a musical sequence is influenced by three accent structures: rhythmic grouping, melodic, and metric accent structures. We investigate whether performers emphasize these types of accents with systematic performance variations (intensity, interonset timing, and articulation). In three experiments, skilled pianists performed sequences of various musical complexities: simple sequences containing only one accent structure (Experiment 1), more complex sequences containing coinciding or conflicting accent structures (Experiment 2), and a concert pianist's performance of a sonata containing coinciding and conflicting accent structures (Experiment 3). In all three musical contexts, similar systematic performance variations were observed in relation to each type of accent. Variations corresponding to rhythmic grouping accents were most consistent across musical contexts and dominated when the accent structures conflicted. These findings suggest perceptual correlates for the accent structures in music performance that may facilitate listeners' segmentation of musical sequences.

Sequence Memory in Music Performance

2005 ◽  
Vol 14 (5) ◽  
pp. 247-250 ◽  
Author(s):  
Caroline Palmer
Keyword(s):  
Cognitive Processes ◽  
Time Course ◽  
Music Performance ◽  
Musical Experience ◽  
Temporal Properties ◽  
Sequential Structure ◽  
Complex Sequences ◽  
Children's Memory ◽  
Sequence Memory ◽  
Performance Conditions

How do people remember and produce complex sequences like music or speech? Music provides an example of excellent sequence memory under fast performance conditions; novices as well as skilled musicians can perform memorized music rapidly, without making mistakes. In addition, musical pitches repeat often within a melodic sequence in different orders, yet people do not confuse the sequential ordering; temporal properties of musical pitches aid sequence memory. I describe a contextual model of sequence memory that is sensitive to the rate at which musical sequences are produced and to individual differences among performers. Age and musical experience differentiate adults' and children's memory for musical sequences during performance. Performers' memory for the sequential structure of one melody transfers or generalizes to other melodies in terms of the sequence of pitch events, their temporal properties, and their movements. Motion-analysis techniques provide further views of the time course of the cognitive processes that make sequence memory for music so accurate.

Music Performance and Theories of Memory

2000 ◽  
Author(s):  
Steven A. Finney ◽  
Caroline Palmer
Keyword(s):  
Music Performance

Shared intentions in joint music performance

2009 ◽  
Author(s):  
Janeen D. Loehr ◽  
Rowena Pillay ◽  
Caroline Palmer
Keyword(s):  
Music Performance

A kinetic analysis of coupled sequential enzyme reactions

2018 ◽  
Author(s):  
Justin Eilertsen ◽  
Santiago Schnell
Keyword(s):  
Enzyme Assay ◽  
Sequential Reaction ◽  
Enzyme Reactions ◽  
Indicator Reaction ◽  
Single Substrate ◽  
Complex Sequences ◽  
Catalyzed Reactions ◽  
Enzyme Catalyzed Reactions ◽  
Single Enzyme

<div>As a case study, we consider a coupled enzyme assay of sequential enzyme reactions obeying the Michaelis--Menten reaction mechanism. The sequential reaction consists of a single-substrate, single-enzyme non-observable reaction followed by another single-substrate, single-enzyme observable reaction (indicator reaction). In this assay, the product of the non-observable reaction becomes the substrate of the indicator reaction. A mathematical analysis of the reaction kinetics is performed, and it is found that after an initial fast transient, the sequential reaction is described by a pair of interacting Michaelis--Menten equations. Timescales that approximate the respective lengths of the indicator and non-observable reactions, as well as conditions for the validity of the Michaelis--Menten equations are derived. The theory can be extended to deal with more complex sequences of enzyme catalyzed reactions.</div>

A kinetic analysis of coupled sequential enzyme reactions

2018 ◽  
Author(s):  
Justin Eilertsen ◽  
Santiago Schnell
Keyword(s):  
Enzyme Assay ◽  
Sequential Reaction ◽  
Enzyme Reactions ◽  
Indicator Reaction ◽  
Single Substrate ◽  
Complex Sequences ◽  
Catalyzed Reactions ◽  
Enzyme Catalyzed Reactions ◽  
Single Enzyme

<div>As a case study, we consider a coupled enzyme assay of sequential enzyme reactions obeying the Michaelis-Menten reaction mechanism. The sequential reaction consists of a single-substrate, single enzyme non-observable reaction followed by another single-substrate, single enzyme observable reaction (indicator reaction). In this assay, the product of the non-observable reaction becomes the substrate of the indicator reaction. A mathematical analysis of the reaction kinetics is performed, and it is found that after an initial fast transient, the sequential reaction is described by a pair of interacting Michaelis-Menten equations. Timescales that approximate the respective lengths of the indicator and non-observable reactions, as well as conditions for the validity of the Michaelis-Menten equations are derived. The theory can be extended to deal with more complex sequences of enzyme catalyzed reactions.</div>

Photon Emission Spectral Signatures of AlGaN/GaN HEMT for Functional and Reliability Analysis

2008 ◽  
Author(s):  
Arkadiusz Glowacki ◽  
Christian Boit ◽  
Richard Lossy ◽  
Joachim Würfl
Keyword(s):  
Reliability Analysis ◽  
Gate Voltage ◽  
Near Infrared ◽  
Photon Emission ◽  
Electrical Characterization ◽  
Spectral Signatures ◽  
Operating Modes ◽  
Gan Hemt ◽  
Spectrally Resolved ◽  
Performance Variations

Abstract Non-degraded and degraded AlGaN/GaN HEMT devices have been characterized electrically and investigated in various operating modes using integral and spectrally resolved photon emission (PE). In degraded devices the PE dependence on the gate voltage differs from the non-degraded devices. Various types of dependencies on the gate voltage have been identified when investigating local degradation sites. PE spectroscopy was performed at various bias conditions. For both devices broad spectra have been obtained in a wavelength regime from visible to near-infrared, including local performance variations. Signatures of the degradation have been determined in the electrical characterization, in integral PE distribution and in the PE spectrum.

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