Measurement, Analysis, Evaluation, and Restoration of Skid Resistance on Streets of Muscat

1999 ◽  
Vol 1655 (1) ◽  
pp. 200-210 ◽  
Author(s):  
Galal A. Ali ◽  
Rashid Al-Mahrooqi ◽  
Mohammed Al-Mammari ◽  
Nasser Al-Hinai ◽  
Ramzi Taha
Keyword(s):  
Skid Resistance ◽  
Measurement Analysis

Positive Associations Primacy in the IAT

2011 ◽  
Vol 58 (5) ◽  
pp. 376-384 ◽  
Author(s):  
Pasquale Anselmi ◽  
Michelangelo Vianello ◽  
Egidio Robusto
Keyword(s):  
Implicit Association Test ◽  
Rasch Measurement ◽  
Normal Weight ◽  
Association Test ◽  
Primacy Effect ◽  
Implicit Association ◽  
Obese People ◽  
Measurement Analysis ◽  
Implicit Prejudice

Two studies investigated the different contribution of positive and negative associations to the size of the Implicit Association Test (IAT) effect. A Many-Facet Rasch Measurement analysis was applied for the purpose. Across different IATs (Race and Weight) and different groups of respondents (White, Normal weight, and Obese people) we observed that positive words increase the IAT effect whereas negative words tend to decrease it. Results suggest that the IAT is influenced by a positive associations primacy effect. As a consequence, we argue that researchers should be careful when interpreting IAT effects as a measure of implicit prejudice.

Relationships Between the Friction and Viscoelastic Properties of Rubber

2000 ◽  
Vol 28 (3) ◽  
pp. 178-195 ◽  
Author(s):  
N. Amino ◽  
Y. Uchiyama
Keyword(s):  
Viscoelastic Properties ◽  
Skid Resistance ◽  
Grain Sizes ◽  
Abrasive Grain ◽  
The Coefficient Of Friction ◽  
Tan Δ ◽  
Silicone Carbide ◽  
And Storage ◽  
Wet Skid Resistance ◽  
Frequency Curves

Abstract In this study, the relationships between friction and viscoelastic properties such as loss tangent tan δ and storage modulusE′ were examined. Wet skid resistance was measured using the British Pendulum Tester. The rubber specimens were rubbed againstfive silicone carbide cloths of differing abrasive grain sizes. The viscoelastic properties of the rubber specimens were measured with a viscoelasticspectrometer. From the data on wet skid resistance and viscoelastic properties, it is found that the coefficient of friction μ varies as follows:           μ = a + b · tan δ/E′ where a and b are constants. Tan δ/E′ was related to the hysteresis term of friction, and the μ-frequency curves were compared with the tan δ/E′ –frequency curves.

scholarly journals Engine Malfunctioning Conditions Identification through Instantaneous Crankshaft Torque Measurement Analysis

2021 ◽  
Vol 11 (8) ◽  
pp. 3522
Author(s):  
Konstantinos-Marios Tsitsilonis ◽  
Gerasimos Theotokatos
Keyword(s):  
Operating Conditions ◽  
Cylinder Pressure ◽  
Dynamics Model ◽  
Engine Model ◽  
Measurement Analysis ◽  
Start Of Injection ◽  
Rate Of Heat Release ◽  
Relationship Of ◽  
Diagnostic Measurement ◽  
The Relationship

In this study a coupled thermodynamics and crankshaft dynamics model of a large two-stroke diesel engine was utilised, to map the relationship of the engine Instantaneous Crankshaft Torque (ICT) with the following frequently occurring malfunctioning conditions: (a) change in Start of Injection (SOI), (b) change in Rate of Heat Release (RHR), (c) change in scavenge air pressure, and (d) blowby. This was performed using frequency analysis on the engine ICT, which was obtained through a series of parametric runs of the coupled engine model, under the various malfunctioning and healthy operating conditions. This process demonstrated that engine ICT can be successfully utilised to identify the distinct effects of malfunctions (c) or (d), as they occur individually in any cylinder. Furthermore by using the same process, malfunctions (a) and (b) can be identified as they occur individually for any cylinder, however there is no distinct effect on the engine ICT among these malfunctions, since their effect on the in-cylinder pressure is similar. As a result, this study demonstrates the usefulness of the engine ICT as a non-intrusive diagnostic measurement, as well as the benefits of malfunctioning conditions mapping, which allows for quick and less resource intensive identification of engine malfunctions.

Vibration Measurement & Analysis Using Arduino Based Accelerometer

2020 ◽  
Author(s):  
Md. Hasibuzzaman ◽  
Abu Shufian ◽  
Rubayat Kabir Shefa ◽  
Rifat Raihan ◽  
Joy Ghosh ◽  
...  
Keyword(s):  
Vibration Measurement ◽  
Measurement Analysis

Simulation and measurement analysis of TGPR caused by GIS switchgear operation

2021 ◽  
Author(s):  
Qingping Zhang ◽  
Mingyu Huang ◽  
Zhenhua Yan ◽  
Bo Gao ◽  
Xiuguang Li ◽  
...  
Keyword(s):  
Measurement Analysis
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