A laboratory study on attentional bias as an underlying mechanism affecting the link between cortisol and performance, leading to a discussion on the nature of the stressor (artificial vs. psychosocial)

2017 ◽  
Vol 175 ◽  
pp. 9-15 ◽  
Author(s):  
Franziska Lautenbach
Keyword(s):  
Attentional Bias ◽  
Laboratory Study ◽  
Underlying Mechanism ◽  
And Performance

scholarly journals Sensitivity and Specificity of the Test Kit BAX® for Screening/ E. coli O157:H7 in Ground Beef: Independent Laboratory Study

2000 ◽  
Vol 83 (6) ◽  
pp. 1349-1356 ◽  
Author(s):  
Alan M Hochberg ◽  
Paul N M Gerhardt ◽  
Thoa K Cao ◽  
Wilfredo Ocasio ◽  
W Mark Barbour ◽  
...  
Keyword(s):  
Sensitivity And Specificity ◽  
Laboratory Study ◽  
Ground Beef ◽  
Culture Method ◽  
E Coli ◽  
Independent Laboratory ◽  
Test Kit ◽  
And Performance ◽  
Food Laboratory ◽  
Product Claims

Abstract An independent laboratory study of the BAX® for Screening/E. coli O157:H7 kit was conducted at the National Food Laboratory, Inc., Dublin, CA, to complete AOAC® Performance Tested MethodSM certification. The BAX system kit was compared with the BAM culture method and a modified BAM culture method for detection of E. coli O157:H7 in ground beef. The BAX system kit detected the target organism at levels approximately 10-fold lower than those that gave positive BAM results. This study validated product claims, and Performance Tested Method status was granted.

Three Layers Weaved once Structure Design and Performance Testing for Fabric Keyboard Switch

2011 ◽  
Vol 675-677 ◽  
pp. 1171-1174
Author(s):  
Mei Ling Zhang ◽  
Rui Wang ◽  
Zhan Gang Wang
Keyword(s):  
Laboratory Study ◽  
Performance Testing ◽  
Structure Design ◽  
Conductive Material ◽  
Contact Areas ◽  
Smart Textile ◽  
And Performance ◽  
Further Development

Flexible fabric keyboard is a field of smart textile. It can overcome traditional horniness keyboard can’t be foldable and washing. In this laboratory study there is Three Layers Weaved Once structure designed which consists of three kinds of orifice dimension, for example 4 wefts, 8 wefts and 12 wefts. At the same time three kinds of conductive filaments number combined are planed for each orifice dimension. There are 1, 4 and 8 roots of filaments combined together so that contact areas of the conductive material are changed. Then the immediate regain, connection pressure and connection ratio are tested and analyzed for every kind of fabric keyboard switch. It is concluded that 4 wefts orifice dimension and 4 roots of filaments combined is a better project. These findings may assist in recommendations regarding the further development of flexible fabric keyboard. The fabric keyboard switch forms the foundation for many smart textile applications.

Trait Empathy associated with Agreeableness and rhythmic entrainment in a spontaneous movement to music task: Preliminary exploratory investigations

2017 ◽  
Vol 23 (1) ◽  
pp. 5-24 ◽  
Author(s):  
Joshua Michael Silberstein Bamford ◽  
Jane Whitfield Davidson
Keyword(s):  
Undergraduate Students ◽  
Mirror Neuron System ◽  
Music Cognition ◽  
Mirror Neuron ◽  
Underlying Mechanism ◽  
Brain Regions ◽  
Spontaneous Movement ◽  
Musical Rhythm ◽  
Trait Empathy ◽  
And Performance

The simulation theory of empathy suggests that we use motor processing to empathise, through modelling the actions of others. Similarly, research into embodied music cognition posits that music, particularly musical rhythm, is perceived as a motor stimulus. In both cases, the human Mirror Neuron System (MNS) is put forward as a potential underlying mechanism. If this is the case, some overlap may exist between the ability to empathise with others, and the ability to perceive rhythm in music. The present study investigated this relationship indirectly, through the study of individual differences in Trait Empathy and rhythmic entrainment. Undergraduate students ( N = 237) completed a questionnaire battery including the EQ-Short, BFAS and questions about musical and dance experience. A relationship was observed between Agreeableness on the BFAS and the EQ-Short ( r = .554). Tests on a controlled sample of these participants ( n = 11) found a relationship between Trait Empathy and performance on a rhythmic entrainment task, involving spontaneous movement to a musical stimulus ( rτ = -.686). A novel measure of rhythmic entrainment was used, assessing each participant on the time taken to re-establish entrainment following an abrupt change in tempo. The findings suggest that Empathy and rhythmic entrainment may utilise similar brain regions. These regions may also be associated with the MNS, although neuroimaging data would be required to confirm this. Qualitative observations of the participants’ responses to the various musical stimuli were also recorded, and may inform future study. Furthermore, the observed relationship between Agreeableness and Trait Empathy may have implications for how these personality constructs are treated in the literature.

scholarly journals Comfort and performance impact of personal control over thermal environment in summer: Results from a laboratory study

2015 ◽  
Vol 87 ◽  
pp. 315-326 ◽  
Author(s):  
Atze C. Boerstra ◽  
Marije te Kulve ◽  
Jørn Toftum ◽  
Marcel G.L.C. Loomans ◽  
Bjarne W. Olesen ◽  
...  
Keyword(s):  
Laboratory Study ◽  
Thermal Environment ◽  
Personal Control ◽  
Performance Impact ◽  
And Performance

scholarly journals Characterization and Performance of Lactate-Feeding Consortia for Reductive Dechlorination of Trichloroethene

2021 ◽  
Vol 9 (4) ◽  
pp. 751
Author(s):  
Jiangwei Li ◽  
Anyi Hu ◽  
Shijie Bai ◽  
Xiaoyong Yang ◽  
Qian Sun ◽  
...  
Keyword(s):  
Community Assembly ◽  
Reductive Dechlorination ◽  
Amplicon Sequencing ◽  
Underlying Mechanism ◽  
Contaminated Sites ◽  
Bioinformatics Analyses ◽  
16S Rdna Amplicon Sequencing ◽  
And Performance ◽  
Stochastic Forces ◽  
Anaerobic Media

Understanding the underlying mechanism that drives the microbial community mediated by substrates is crucial to enhance the biostimulation in trichloroethene (TCE)-contaminated sites. Here, we investigated the performance of stable TCE-dechlorinating consortia by monitoring the variations in TCE-related metabolites and explored their underlying assembly mechanisms using 16S rDNA amplicon sequencing and bioinformatics analyses. The monitoring results indicated that three stable TCE-dechlorinating consortia were successfully enriched by lactate-containing anaerobic media. The statistical analysis results demonstrated that the microbial communities of the enrichment cultures changed along with time and were distinguished by their sample sources. The deterministic and stochastic processes were simultaneously responsible for shaping the TCE-dechlorinating community assembly. The indicator patterns shifted with the exhaustion of the carbon source and the pollutants, and the tceA-carrying Dehalococcoides, as an indicator for the final stage samples, responded positively to TCE removal during the incubation period. Pseudomonas, Desulforhabdus, Desulfovibrio and Methanofollis were identified as keystone populations in the TCE-dechlorinating process by co-occurrence network analysis. The results of this study indicate that lactate can be an effective substrate for stimulated bioremediation of TCE-contaminated sites, and the reduction of the stochastic forces or enhancement of the deterministic interventions may promote more effective biostimulation.

scholarly journals Properties of Ternary Blended Cement Containing Metakaolin and Fly Ash

2008 ◽  
Vol 5 (1) ◽  
pp. 13
Author(s):  
Mohd Fadzil Arshad ◽  
Megat Azmi Megat Johari ◽  
Muhd Norhasri Muhd Sidek ◽  
Mazlee Mohd Noor
Keyword(s):  
Fly Ash ◽  
Portland Cement ◽  
Construction Industry ◽  
Cement Paste ◽  
Laboratory Study ◽  
Ordinary Portland Cement ◽  
Blended Cement ◽  
Concrete Construction ◽  
Concrete Properties ◽  
And Performance

This paper presents the results of a laboratory study on the properties of Ternary Blended Cement (TBC) containing blends of ordinary Portland cement (OPC), Metakaolin (MK) and Fly Ash (FA). Analyses on the cementitious properties and engineering concrete properties containing TBC produced have been performed. The resulted was than compared with those of OPC and binary blended cementitious (BBC) systems containing OPC:MK and OPC:FA. In general, the results show that the inclusion of MK and FA in TBC alter the properties and performance of the cement paste and concrete to a certain degree as well as the resulting the TBC could potentially be used in the concrete construction industry.

Parametric Single Gap Turbine Rim Seal Model With Boundary Generation for Asymmetric External Flow

2010 ◽  
Author(s):  
M. Hu¨ning
Keyword(s):  
Discharge Coefficient ◽  
Peak Pressure ◽  
Geometric Mean ◽  
Flow Distribution ◽  
Underlying Mechanism ◽  
Flow Stagnation ◽  
Proposed Model ◽  
Sensitivity Studies ◽  
And Performance ◽  
The Impact

In an effort to provide predictions for hot annulus ingestion flows across turbine rim seals into rotor-stator wheel-space cavities, this paper describes a parametric single gap turbine rim seal model, which contains of several different sub- or part-models. Annulus pressure variations are the underlying mechanism driving ingestion. Some of the sub-models are matched to published experimental results. The model results are compared with measurements from different test rigs. The proposed model calculates the annulus boundary conditions based on geometric, mean turbine aerodynamic and performance parameters for the rim seal under consideration. Special attention is paid to the modelling of the flow stagnation upstream of airfoils as a row of half-bodies and the local seal gap discharge coefficient in order to assess the flow distribution through the rim seal. Mixing zones are accounted by a mixing cascade modelling. The peak pressure attenuation behaviour around the seal is considered. Sensitivity studies, e.g. for the impact of annulus boundary layer thickness, are performed.

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