Clustering, Jamming and Segregation in Cohesive Granular Materials

2002 ◽  
Author(s):  
Azadeh Samadani ◽  
Daniel L. Blair ◽  
A. Kudrolli
Keyword(s):  
High Speed ◽  
Inelastic Collisions ◽  
Angle Of Repose ◽  
High Resolution Imaging ◽  
Magnetic Attraction ◽  
Granular Pile ◽  
Resolution Imaging ◽  
Fluidized System ◽  
Series Of Experiments ◽  
The Stability

We present a series of experiments to investigate the stability, flow and segregation when liquid bridges or magnetic attraction forces between grains are present. Quantitative data is obtained by high speed and high resolution imaging. First, we measure the angle of repose of a granular pile formed by pouring wet grains in to a quasi-two dimensional silo and compare them to existing models. Second, we measure the size separation of bi-disperse grains as a function of size ratio and viscosity of the liquid. Finally, we introduce a vibro-fluidized system of magnetized particles to study the effect of cohesive forces and inelastic collisions on the formation of clusters and velocity distributions.

scholarly journals High Speed, High Resolution Imaging Spectrometers Based on pnCCDs for XRF and XRD Applications

2016 ◽  
Vol 22 (S3) ◽  
pp. 100-101
Author(s):  
L. Strüder ◽  
R. Hartmann ◽  
P. Holl ◽  
S. Ihle ◽  
M. Huth ◽  
...  
Keyword(s):  
High Resolution ◽  
High Speed ◽  
High Resolution Imaging ◽  
Resolution Imaging

scholarly journals High-resolution imaging of high-speed target based on a reconfigurable photonic fractional Fourier transformer

2021 ◽  
Author(s):  
Shaowen Peng ◽  
Shangyuan Li ◽  
Guanyu Han ◽  
Xiaoxiao Xue ◽  
Xiaoping Zheng
Keyword(s):  
High Resolution ◽  
High Speed ◽  
High Resolution Imaging ◽  
Resolution Imaging

scholarly journals Temporal pixel multiplexing for simultaneous high-speed, high-resolution imaging

2010 ◽  
Vol 7 (3) ◽  
pp. 209-211 ◽  
Author(s):  
Gil Bub ◽  
Matthias Tecza ◽  
Michiel Helmes ◽  
Peter Lee ◽  
Peter Kohl
Keyword(s):  
High Resolution ◽  
High Speed ◽  
High Resolution Imaging ◽  
Resolution Imaging

scholarly journals Spectral-domain Optical Coherence Tomography Imaging of Age-related Macular Degeneration

2011 ◽  
Vol 05 (02) ◽  
pp. 98
Author(s):  
Carlos Alexandre de Amorim Garcia Filho ◽  
Philip J Rosenfeld ◽  
Zohar Yehoshua ◽  
Giovanni Gregori ◽  
◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
High Resolution ◽  
Macular Degeneration ◽  
High Speed ◽  
Retinal Pigment ◽  
Age Related Macular Degeneration ◽  
High Resolution Imaging ◽  
Age Related ◽  
Resolution Imaging ◽  
Sd Oct

Spectral-domain optical coherence tomography (SD-OCT) high-speed, high-resolution imaging of the macula has become an essential tool for evaluating dry and wet age-related macular degeneration (AMD). This high-speed, high-resolution imaging strategy, combined with new innovative algorithms, permits reproducible measurements of the anatomical changes associated with AMD, which include drusen, geographic atrophy (GA) and choroidal neovascularisation (CNV). To visualise drusen and larger retinal pigment epithelial detachments, an algorithm was developed for Cirrus HD-OCT (Carl Zeiss Meditec, Dublin, CA) to detect elevations in the retinal pigment epithelium (RPE). To visualise GA, an algorithm was developed to provide en face visualisation of the macula, which easily identifies and measures areas where the RPE has been lost. To visualise CNV and the associated macular fluid, an algorithm was developed to measure the retinal thickness between the internal limiting membrane and the RPE. No other imaging modality is capable of qualitatively and quantitatively following patients at all stages of AMD, which makes SD-OCT the ideal instrument for following disease progression and the effect of therapies.

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