Modeling the Erroneous Behaviour of a Sequential Memory Component with Streams

2009 ◽  
pp. 651-661
Author(s):  
Walter Dosch
Keyword(s):  
Sequential Memory

INFLUENCE OF INTONATION ON AUDITORY SEQUENTIAL MEMORY SKILLS

1980 ◽  
Vol 50 (3) ◽  
pp. 703-708
Author(s):  
JACQUELINE I. JOHNSON ◽  
STEVEN B. LEDER ◽  
RICHARD L. EGELSTON
Keyword(s):  
Sequential Memory

scholarly journals Traversal Caches: A Framework for FPGA Acceleration of Pointer Data Structures

2010 ◽  
Vol 2010 ◽  
pp. 1-16 ◽  
Author(s):  
James Coole ◽  
Greg Stitt
Keyword(s):  
Data Structures ◽  
Reconfigurable Computing ◽  
Application Development ◽  
Sequential Memory ◽  
Generalized Framework ◽  
Field Programmable ◽  
Order Of Magnitude ◽  
Programmable Gate Arrays ◽  
Irregular Data ◽  
Access Patterns

Field-programmable gate arrays (FPGAs) and other reconfigurable computing (RC) devices have been widely shown to have numerous advantages including order of magnitude performance and power improvements compared to microprocessors for some applications. Unfortunately, FPGA usage has largely been limited to applications exhibiting sequential memory access patterns, thereby prohibiting acceleration of important applications with irregular patterns (e.g., pointer-based data structures). In this paper, we present a design pattern for RC application development that serializes irregular data structure traversals online into a traversal cache, which allows the corresponding data to be efficiently streamed to the FPGA. The paper presents a generalized framework that benefits applications with repeated traversals, which we show can achieve between 7x and 29x speedup over pointer-based software. For applications without strictly repeated traversals, we present application-specialized extensions that benefit applications with highly similar traversals by exploiting similarity to improve memory bandwidth and execute multiple traversals in parallel. We show that these extensions can achieve a speedup between 11x and 70x on a Virtex4 LX100 for Barnes-Hut n-body simulation.

scholarly journals Nested sequences of hippocampal assemblies during behavior support subsequent sleep replay

Science ◽  
2018 ◽  
Vol 362 (6415) ◽  
pp. 675-679 ◽  
Author(s):  
Céline Drieu ◽  
Ralitsa Todorova ◽  
Michaël Zugaro
Keyword(s):  
Neuronal Activity ◽  
Time Scale ◽  
Memory Formation ◽  
Place Cells ◽  
Behavior Support ◽  
Initial Formation ◽  
Memory Traces ◽  
Sequential Memory ◽  
Episodic Memories ◽  
Initial Storage

Consolidation of spatial and episodic memories is thought to rely on replay of neuronal activity sequences during sleep. However, the network dynamics underlying the initial storage of memories during wakefulness have never been tested. Although slow, behavioral time scale sequences have been claimed to sustain sequential memory formation, fast (“theta”) time scale sequences, nested within slow sequences, could be instrumental. We found that in rats traveling passively on a model train, place cells formed behavioral time scale sequences but theta sequences were degraded, resulting in impaired subsequent sleep replay. In contrast, when the rats actively ran on a treadmill while being transported on the train, place cells generated clear theta sequences and accurate trajectory replay during sleep. Our results support the view that nested sequences underlie the initial formation of memory traces subsequently consolidated during sleep.

Orthographic processing and visual sequential memory in unexpectedly poor spellers

2008 ◽  
Vol 31 (1) ◽  
pp. 136-156 ◽  
Author(s):  
Virginia M. Holmes ◽  
Aisling M. Malone ◽  
Holly Redenbach
Keyword(s):  
Orthographic Processing ◽  
Sequential Memory ◽  
Poor Spellers

Association between Paired Subtests of Auditory Sequential Memory Administered to Preschool Children

1989 ◽  
Vol 68 (1) ◽  
pp. 255-258
Author(s):  
Gail D. Chermak ◽  
Julie M. Fisher
Keyword(s):  
Preschool Children ◽  
Poor Performance ◽  
Linguistic Context ◽  
Primary Scale ◽  
Sequential Memory ◽  
Unexplained Variance

Auditory sequential memory subtests of the Wechsler Preschool and Primary Scale of Intelligence and the McCarthy Scales of Children's Abilities were administered individually to 20 normal preschool children. Poor performance on the McCarthy words/sentences subtest suggests retention difficulties associated with isolated words in the absence of linguistic context. Correlations of only moderate strength and large unexplained variance indicate poor predictability between subtests despite similarities in content and procedural details.

scholarly journals Quality of life of children with poor school performance: association with hearing abilities and behavioral issues

2019 ◽  
Vol 77 (3) ◽  
pp. 147-154
Author(s):  
Bárbara Antunes Rezende ◽  
Stela Maris Aguiar Lemos ◽  
Adriane Mesquita de Medeiros
Keyword(s):  
Quality Of Life ◽  
Social Behavior ◽  
School Performance ◽  
Multivariate Logistic Regression Analysis ◽  
Written Language ◽  
Poor School Performance ◽  
Sequential Memory ◽  
Hearing Abilities ◽  
Poor School

ABSTRACT The aim of the present study was to investigate the quality of life of children with poor school performance and its association with behavioral aspects and hearing abilities. Methods: This cross-sectional observational study, developed in a town in the state of Minas Gerais, Brazil, investigated a random sample of public school children, aged 7-12 years old, who performed poorly in school and received specialized educational assistance. The study comprised two stages: 1) collection of data from parents on their children's health, educational, and socioeconomic profile, and from the Strengths and Difficulties Questionnaire; 2) administration of a quality of life evaluation scale to the schoolchildren. For the assessment of auditory function, transient otoacoustic emissions were used and auditory processing was tested. The following tests were used: verbal sequential memory, nonverbal sequential memory, sound localization, dichotic digits, duration pattern test (flute) and random gap detection. The collected data were analyzed using Excel and STATA 11.0 software. Quality of life was considered the response variable. The explanatory variables were grouped for univariate and multivariate logistic regression analysis with the level of significance set at 5%. Results: A statistically significant association was found between impaired quality of life, altered pro-social behavior, and the absence of parental complaints about the children's written language development. Conclusions: Quality of life is impaired in children with poor school performance. The lack of parental complaints about written language and changes in social behavior increased the likelihood of a child having a poor quality of life.

scholarly journals Nearly Extensive Sequential Memory Lifetime Achieved by Coupled Nonlinear Neurons

2012 ◽  
Vol 24 (10) ◽  
pp. 2678-2699 ◽  
Author(s):  
Taro Toyoizumi
Keyword(s):  
Cognitive Processes ◽  
Neural Activity ◽  
Short Term Memory ◽  
Memory Performance ◽  
Linear Part ◽  
Network Size ◽  
Short Term ◽  
Time Step ◽  
Sequential Memory ◽  
The Brain

Many cognitive processes rely on the ability of the brain to hold sequences of events in short-term memory. Recent studies have revealed that such memory can be read out from the transient dynamics of a network of neurons. However, the memory performance of such a network in buffering past information has been rigorously estimated only in networks of linear neurons. When signal gain is kept low, so that neurons operate primarily in the linear part of their response nonlinearity, the memory lifetime is bounded by the square root of the network size. In this work, I demonstrate that it is possible to achieve a memory lifetime almost proportional to the network size, “an extensive memory lifetime,” when the nonlinearity of neurons is appropriately used. The analysis of neural activity revealed that nonlinear dynamics prevented the accumulation of noise by partially removing noise in each time step. With this error-correcting mechanism, I demonstrate that a memory lifetime of order [Formula: see text] can be achieved.

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