Expansion Tunnel Experiments of Earth Reentry Flow with Surface Ablation

2016 ◽  
Vol 53 (5) ◽  
pp. 887-899 ◽  
Author(s):  
Steven W. Lewis ◽  
Richard G. Morgan ◽  
Timothy J. McIntyre ◽  
Christopher R. Alba ◽  
Robert B. Greendyke
Keyword(s):  
Surface Ablation ◽  
Expansion Tunnel

scholarly journals Severe Corneal Morphological Alterations after Excimer Laser Surface Ablation for a High Astigmatism

2021 ◽  
pp. 492-496
Author(s):  
Anna M. Roszkowska ◽  
Giovanni W. Oliverio ◽  
Giuseppe A. Signorino ◽  
Mario Urso ◽  
Pasquale Aragona
Keyword(s):  
Excimer Laser ◽  
Corneal Stroma ◽  
Corneal Topography ◽  
Laser Surface ◽  
Slit Lamp ◽  
Slit Lamp Examination ◽  
Morphological Alterations ◽  
Surface Ablation ◽  
Confocal Images

We report long-term alterations of anterior corneal stroma after excimer laser surface ablation for a high astigmatism. The patient claimed progressive visual loss in his right eye (RE) during the last 3 years after bilateral laser-assisted subepithelial keratectomy (LASEK) surgery. His examination comprised visual acuity (UDVA and CDVA), slit-lamp examination, corneal topography and tomography, AS-OCT, and confocal microscopy. The UDVA was 0.1 in his RE and 1.0 in the left eye. The CDVA in the RE was 0.8. The slit-lamp examination showed a stromal lesion in the inferior paracentral corneal zone, with multiple vertical tissue bridges and severe thinning. Corneal topography and tomography showed central flattening with inferior steepening and severe alteration in elevation maps. AS-OCT showed void areas in the anterior stroma with thinning of the underlying tissue, and confocal images were not specific. In this case, progressive corneal steepening and thinning that manifest topographically as inferior ectasia occurred in correspondence to the singular stromal alterations after LASEK.

Surface ablation in the impingement region of a liquid jet

AIChE Journal ◽  
1979 ◽  
Vol 25 (4) ◽  
pp. 630-638 ◽  
Author(s):  
Michael J. Swedish ◽  
Michael Epstein ◽  
John H. Linehan ◽  
George A. Lambert ◽  
George M. Hauser ◽  
...  
Keyword(s):  
Liquid Jet ◽  
Surface Ablation

Flow characteristics in an expansion tunnel as inferred from velocity measurements

AIAA Journal ◽  
1977 ◽  
Vol 15 (9) ◽  
pp. 1364-1366
Author(s):  
Charles G. Miller ◽  
Wilfred J. Friesen
Keyword(s):  
Flow Characteristics ◽  
Velocity Measurements ◽  
Expansion Tunnel

scholarly journals Surface Ablation Techniques for Myopia – A Review of the Advances Over the Past 25 Years

2017 ◽  
Vol 11 (01) ◽  
pp. 31
Author(s):  
Jesper Hjortdal ◽  
Keyword(s):  
Excimer Laser ◽  
Clinical Results ◽  
Review Article ◽  
Ablation Techniques ◽  
Photorefractive Keratectomy ◽  
Excimer Lasers ◽  
The Past ◽  
Surface Ablation ◽  
Meta Analyses

Photorefractive keratectomy for correction of myopia was the first excimer laser-based technique to be developed. During the last 25 years, excimer lasers have improved technologically, several variations of the technique have been developed and pre- and postoperative pharmaceutical therapies have been investigated. This review article summarises these developments and the published meta-analyses on comparison of surface ablation techniques and laser in situ keratomileusis. The main conclusion is that there seem to be no differences between the clinical results obtained with the different variations of surface ablation techniques.

scholarly journals Curious Effect of Surface Ablation of a Glacier

Nature ◽  
1909 ◽  
Vol 79 (2045) ◽  
pp. 282-282
Author(s):  
BERNARD SMITH
Keyword(s):  
Surface Ablation ◽  
Effect Of Surface
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