Contact Pressure Between an Elastic Spherical Shell and a Rigid Plate

1972 ◽  
Vol 39 (4) ◽  
pp. 1110-1114 ◽  
Author(s):  
D. P. Updike ◽  
A. Kalnins
Keyword(s):  
Intraocular Pressure ◽  
Theoretical Analysis ◽  
Spherical Shell ◽  
Contact Pressure ◽  
Applanation Tonometry ◽  
Numerical Results ◽  
Thickness Ratio ◽  
Rigid Plate ◽  
Elastic Spherical Shell

A theoretical analysis for the determination of the contact pressure between a uniform elastic spherical shell and a rigid plate is developed. The results are directly applicable to the theory of applanation tonometry which is concerned with the measurement of intraocular pressure. Numerical results are presented for a shell having a radius to thickness ratio of 30.

Determination of reference values for intraocular pressure and Schirmer tear test results in clinically normal domestic donkeys (Equus asinus)

2017 ◽  
Vol 181 (21) ◽  
pp. 565-565 ◽  
Author(s):  
Masoud Selk Ghaffari ◽  
Amin Sabzevari ◽  
SeyedMehdi Ghamsari ◽  
Hussein Shad
Keyword(s):  
Intraocular Pressure ◽  
Keratoconjunctivitis Sicca ◽  
Applanation Tonometry ◽  
Nerve Blocks ◽  
Clinically Normal ◽  
Chemical Restraint ◽  
Equus Asinus ◽  
Schirmer Tear Test ◽  
Initial Survey

This study was conducted to establish normal reference range for the Schirmer tear test (STT) and intraocular pressure (IOP) in clinically normal donkeys for use in clinical practice. Sixteen adult Ethiopian domestic donkeys were used in this study. Complete ophthalmic examinations were performed without chemical restraint. STT values were evaluated in both eyes of all donkeys using a commercial STT strip. IOP was measured in both eyes with a Tono-Pen Vet (Reichert. USA) without using regional nerve blocks. STT values for all eyes (n=32) were 22.1±6.9 mm/minute with a range of 13–35 mm/minute. Comparison of mean STT values between right (n=16) and left eyes (n=16) showed no differences (P=0.6). Mean ±sd IOP values by applanation tonometry were 17.8±3.7 mmHg (range 13.5–24.5 mmHg). Comparison of mean IOP values between right (n=16) and left eyes (n=16) showed no differences (P=0.7). This initial survey provides means and ranges for IOP and STT values in donkeys. These data will assist veterinary ophthalmologists in more accurate diagnosis and management of ophthalmic diseases in donkeys, including keratoconjunctivitis sicca and glaucoma

Toward Fast Determination of Protein Stability Maps: Experimental and Theoretical Analysis of Mutants of a Nocardiopsis prasina Serine Protease

Biochemistry ◽  
2012 ◽  
Vol 51 (26) ◽  
pp. 5339-5347 ◽  
Author(s):  
Damien Farrell ◽  
Helen Webb ◽  
Michael A. Johnston ◽  
Thomas A. Poulsen ◽  
Fergal O’Meara ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Protein Stability ◽  
Serine Protease ◽  
Fast Determination ◽  
Stability Maps

scholarly journals Numerical methods for solving the multi-term time-fractional wave-diffusion equation

2013 ◽  
Vol 16 (1) ◽  
Author(s):  
Fawang Liu ◽  
Mark Meerschaert ◽  
Robert McGough ◽  
Pinghui Zhuang ◽  
Qingxia Liu
Keyword(s):  
Numerical Methods ◽  
Theoretical Analysis ◽  
Diffusion Equation ◽  
Fractional Derivatives ◽  
Fractional Laplacian ◽  
Numerical Results ◽  
Diffusion Equations ◽  
Time Space ◽  
Methods And Techniques ◽  
Wave Diffusion

AbstractIn this paper, the multi-term time-fractional wave-diffusion equations are considered. The multi-term time fractional derivatives are defined in the Caputo sense, whose orders belong to the intervals [0,1], [1,2), [0,2), [0,3), [2,3) and [2,4), respectively. Some computationally effective numerical methods are proposed for simulating the multi-term time-fractional wave-diffusion equations. The numerical results demonstrate the effectiveness of theoretical analysis. These methods and techniques can also be extended to other kinds of the multi-term fractional time-space models with fractional Laplacian.

Metrology of the photo-grid determination of fracture strain for a plate in bending

1968 ◽  
Vol 3 (2) ◽  
pp. 96-97
Author(s):  
R T Hartlen ◽  
L E Jones
Keyword(s):  
Circumferential Strain ◽  
Fracture Strain ◽  
Thickness Ratio ◽  
Grid Data ◽  
Fracture Location ◽  
Maximum Value

Aluminium plates (7/1 width/thickness ratio) were bent to fracture. Circumferential strain at fracture location (maximum value 0.26) was obtained by special plotting and extrapolation of (millimetre) photo-grid data.

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