scholarly journals Optical assessment of large marine particles: Development of an imaging and analysis system for quantifying large particle distributions and fluxes. Final report, June 1992--May 1996

1997 ◽  
Author(s):  
I.D. Walsh ◽  
W.D. Gardner
Keyword(s):  
Large Particle ◽  
Final Report ◽  
Particle Distributions ◽  
Marine Particles ◽  
Analysis System

Modeling Deposit Erosion in Internal Turbine Cooling Geometries

2019 ◽  
Author(s):  
Nathan D. Libertowski ◽  
Gabriel M. Geiger ◽  
Jeffrey P. Bons
Keyword(s):  
Large Particle ◽  
Erosion Rate ◽  
Flow Simulation ◽  
Road Dust ◽  
Impingement Cooling ◽  
Particle Distributions ◽  
Turbine Cooling ◽  
Key Features ◽  
Deposit Structure ◽  
Adhesive Forces

Abstract Experiments were performed to study the erosion of deposit structures due to large particle impacts (> 5 μm). Cone shaped dust deposits were created in an oversized (6.35 mm diameter) impingement cooling jet at 811 K with 0–5 μm Arizona Road Dust (ARD). Subsequently, the deposit cones were eroded with larger particle distributions (5–10, 10–20, 20–40, and 40–80 μm ARD) at various velocities and temperatures. It was found that erosion rate increased with increasing particle size and flow velocity and with decreasing temperature. The dependency on size and velocity occurs through the particle’s kinetic energy at impact, while the dependency on temperature is related to the adhesive forces in the deposit structure. Using the experimental data, an empirical erosion model was developed to be added to the OSU deposition model. A computational flow simulation combined with mesh morphing is shown to capture key features of the erosion physics.

Automated Image Analysis Of Nuclear And Cytoplasmic Changes In Exfoliated Cells From Tracheas Treated With Carcinogen

1977 ◽  
Vol 35 ◽  
pp. 220-221
Author(s):  
S.F. Stinson ◽  
J.C. Lilga ◽  
M.B. Sporn
Keyword(s):  
Image Analysis ◽  
Pattern Analysis ◽  
Relative Proportion ◽  
Automated Image Analysis ◽  
Image Analyzer ◽  
Cross Sectional ◽  
Exfoliated Cells ◽  
Neoplastic Lesions ◽  
Analysis System ◽  
Morphologic Criterion

Increased nuclear size, resulting in an increase in the relative proportion of nuclear to cytoplasmic sizes, is an important morphologic criterion for the evaluation of neoplastic and pre-neoplastic cells. This paper describes investigations into the suitability of automated image analysis for quantitating changes in nuclear and cytoplasmic cross-sectional areas in exfoliated cells from tracheas treated with carcinogen.Neoplastic and pre-neoplastic lesions were induced in the tracheas of Syrian hamsters with the carcinogen N-methyl-N-nitrosourea. Cytology samples were collected intra-tracheally with a specially designed catheter (1) and stained by a modified Papanicolaou technique. Three cytology specimens were selected from animals with normal tracheas, 3 from animals with dysplastic changes, and 3 from animals with epidermoid carcinoma. One hundred randomly selected cells on each slide were analyzed with a Bausch and Lomb Pattern Analysis System automated image analyzer.

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