Dimples

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Image Title: Dimples

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By: James Cook
Copyright ©2009

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Photographer	James Cook {Karma:38068}
Project	#54 Glass	Camera Model	Canon PowerShot SD950
Categories	Cityscape From The Field Photoart	Film Format	Digital JPEG High
Portfolio	Evens and Beginnings	Lens	fixed, no digital zoom
Uploaded	3/20/2009	Film / Memory Type	jpg
		ISO / Film Speed	80
Views	959	Shutter
Favorites	0	Aperture	f/
Critiques	6	Rating	Pending / 1 Ratings
Location	City - Seattle State - WA Country - United States
About	This photograph (0240) was shot, in full color, out a Pioneer Square rustic window on 19 October 2007. I find that the bit of the building corrects a balance problem in the arrangement of the dimples in the shot. Thoughts? I am again fascinated by a color image which has submerged itself into a mere black and white world. And what are dimples made from? (SoundUnReason)

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There are 6 Comments in 1 Pages
1

James Cook {K:38068} 3/26/2009

Malules - Thanks. It's quite subtle but I like it.

Malules Fernandez

{K:54810} 3/24/2009

Love this ome!
regards,
Malules

James Cook {K:38068} 3/23/2009

Marian - Thank you.

Marian Man

{K:80636} 3/21/2009

nice!!!!!
fine effect dear James!!!
Marian

James Cook {K:38068} 3/20/2009

Roger - Well, in truth, I cheated: these dimples are formed by out of focus rain drops on the glass. Same final effect though.

Roger Skinner

{K:81846} 3/20/2009

wow!... love it... yeah what are dimples cused by... obviously some irregularity in the manufacturing stage.. but I wonder what causes them

Abstract
In situ pressure measurements within dimples formed in glass–steel point contacts under various sliding conditions were performed using Raman microspectroscopy. Experiments were conducted using a ball-on-disc type apparatus in which a circular contact is formed between a rotating glass disc and a rotating steel ball. Film thickness distributions were measured by duochromatic optical interferometry. Polyphenyl ether oil (5P4E) which has a high pressure–viscosity coefficient was used to produce a dimple in the contact area. Experimental results show that the pressure increases locally in the dimple zone and the pressure profile changes, accompanying the changes of the dimple location as a function of the slide-to-roll ratio. The maximum pressure is located downstream the maximum height of the dimple. The rheological response of the oil film under dimple occurrence conditions is discussed.

wow...

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