scholarly journals Particle contact dynamics as the origin for noninteger power expansion rheology in attractive suspension networks

2022 ◽  
Vol 66 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Irene Natalia ◽  
Randy H. Ewoldt ◽  
Erin Koos
Keyword(s):  
Contact Dynamics ◽  
Particle Contact

Particle contact dynamics on tubes in the freeboard region of fluidized beds

AIChE Journal ◽  
1987 ◽  
Vol 33 (7) ◽  
pp. 1225-1227 ◽  
Author(s):  
S. Biyikli ◽  
K. Tuzla ◽  
J. C. Chen
Keyword(s):  
Fluidized Beds ◽  
Contact Dynamics ◽  
Particle Contact

Assessment of Tongue Position and Laryngeal Height in Two Professional Voice Populations

2020 ◽  
Vol 63 (1) ◽  
pp. 109-124
Author(s):  
Carly Jo Hosbach-Cannon ◽  
Soren Y. Lowell ◽  
Raymond H. Colton ◽  
Richard T. Kelley ◽  
Xue Bao
Keyword(s):  
Vocal Fold ◽  
Vocal Tract ◽  
Current Knowledge ◽  
Acoustic Resonance ◽  
Contact Dynamics ◽  
Voice Disorder ◽  
Music Program ◽  
Tongue Position ◽  
Singer Groups ◽  
Professional Voice

Purpose To advance our current knowledge of singer physiology by using ultrasonography in combination with acoustic measures to compare physiological differences between musical theater (MT) and opera (OP) singers under controlled phonation conditions. Primary objectives addressed in this study were (a) to determine if differences in hyolaryngeal and vocal fold contact dynamics occur between two professional voice populations (MT and OP) during singing tasks and (b) to determine if differences occur between MT and OP singers in oral configuration and associated acoustic resonance during singing tasks. Method Twenty-one singers (10 MT and 11 OP) were included. All participants were currently enrolled in a music program. Experimental procedures consisted of sustained phonation on the vowels /i/ and /ɑ/ during both a low-pitch task and a high-pitch task. Measures of hyolaryngeal elevation, tongue height, and tongue advancement were assessed using ultrasonography. Vocal fold contact dynamics were measured using electroglottography. Simultaneous acoustic recordings were obtained during all ultrasonography procedures for analysis of the first two formant frequencies. Results Significant oral configuration differences, reflected by measures of tongue height and tongue advancement, were seen between groups. Measures of acoustic resonance also showed significant differences between groups during specific tasks. Both singer groups significantly raised their hyoid position when singing high-pitched vowels, but hyoid elevation was not statistically different between groups. Likewise, vocal fold contact dynamics did not significantly differentiate the two singer groups. Conclusions These findings suggest that, under controlled phonation conditions, MT singers alter their oral configuration and achieve differing resultant formants as compared with OP singers. Because singers are at a high risk of developing a voice disorder, understanding how these two groups of singers adjust their vocal tract configuration during their specific singing genre may help to identify risky vocal behavior and provide a basis for prevention of voice disorders.

The effect of friction and impact angle on the spermatozoa–oocyte local contact dynamics

2016 ◽  
Vol 393 ◽  
pp. 32-42 ◽  
Author(s):  
Andjelka Hedrih ◽  
Milan Banić
Keyword(s):  
Impact Angle ◽  
Contact Dynamics ◽  
Local Contact

Identification of Dynamical Contact Parameters for Spindle-Tool Holder Interface Based on the Receptance Coupling Substructure Approach

2011 ◽  
Vol 287-290 ◽  
pp. 2185-2190
Author(s):  
Yong Sheng Zhao ◽  
Ri Qing Dong ◽  
Zhi Feng Liu ◽  
Tie Neng Guo
Keyword(s):  
Contact Dynamics ◽  
Chatter Stability ◽  
Simple Manner ◽  
Accurate Identification ◽  
Tool Holder ◽  
Receptance Coupling ◽  
Dynamical Parameters ◽  
Substructure Approach ◽  
Stiffness And Damping ◽  
Contact Parameters

It is very crucial to accurately identify the parameters of contact dynamics in predicting the chatter stability of spindle–tool holder assemblies in machining centers. Fast and accurate identification of contact dynamics in spindle–tool holder assembly has become an important issue in the recent years. In this paper, the receptance coupling substructure approach is employed for identification the stiffness and damping of the interface in a simple manner, in which the frequency response function of the tool holder is derived from the Timoshenko beam finite elements model. A BT 50 type tool holder is adopted as an application example of the method. Although this study focuses on the contact dynamics at the spindle–tool holder interfaces of the assembly, the approach might be used for identifying the dynamical parameters of other critical interface.

Particle contact characteristics of coarse-grained soils under normal contact

2017 ◽  
Vol 22 (sup1) ◽  
pp. s114-s129 ◽  
Author(s):  
Zhao Cheng ◽  
Hou Rui ◽  
Zhou Jian
Keyword(s):  
Coarse Grained ◽  
Normal Contact ◽  
Particle Contact

Granular contact dynamics with particle elasticity

2012 ◽  
Vol 14 (5) ◽  
pp. 607-619 ◽  
Author(s):  
K. Krabbenhoft ◽  
J. Huang ◽  
M. Vicente da Silva ◽  
A. V. Lyamin
Keyword(s):  
Contact Dynamics

Contact Dynamics in the Adhesion Process between Spherical Polydimethylsiloxane Rubber and Glass Substrate

Langmuir ◽  
2008 ◽  
Vol 24 (24) ◽  
pp. 14059-14065 ◽  
Author(s):  
Yoshihiro Morishita ◽  
Hiroshi Morita ◽  
Daisaku Kaneko ◽  
Masao Doi
Keyword(s):  
Glass Substrate ◽  
Contact Dynamics ◽  
Adhesion Process

Continuous linear impulse balance method for real-time simulations of contact dynamics

1997 ◽  
Author(s):  
F. Belanger ◽  
X. Cyril ◽  
F. Belanger ◽  
X. Cyril
Keyword(s):  
Real Time ◽  
Contact Dynamics ◽  
Balance Method ◽  
Continuous Linear ◽  
Impulse Balance ◽  
Real Time Simulations
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