초록

A radial impeller includes a cover having a frusto-conical portion and multiple blades extending radially outwardly. Related mixing systems involve positioning the radial impeller with blades adjacent a flow opening of a tank to draw water through the flow opening when the impeller is rotated.

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A radial impeller includes a cover having a frusto-conical portion and multiple blades extending radially outwardly. Related mixing systems involve positioning the radial impeller with blades adjacent a flow opening of a tank to draw water through the flow opening when the impeller is rotated. Soc.

A radial impeller includes a cover having a frusto-conical portion and multiple blades extending radially outwardly. Related mixing systems involve positioning the radial impeller with blades adjacent a flow opening of a tank to draw water through the flow opening when the impeller is rotated. Soc. N.Z. (1983) 35:43-49. Molteno, A C B; Hodgkinson, I J; Hewitt, C J; Sanderson, G F, "The development of fixing and focusing behaviour in normal human infants as observed with the Otago photoscreener" Australian and New Zealand Journal of Opthalmology (1992) 20(3):197-205. Panescu, D; Webster, JG, Tompkins, WJ; Staley, RL; Johnson, J; Schlageter, D and Stratbucker, RA, "A database of cardiac arrhythmias" Academic Emergency Medicine (1995) 2:46-49. Pujol, Jaume; Arjona, Montserrat; Arasa, Josep; Badia, Victoria, "Influence of amount and changes in axis of astigmatism on retinal image quality" J. Opt. Soc. Am. A (1998) 15(9):2514-2521. Roorda, Austin; Campbell, Melanie C.W., "Geometrical theory to predict eccentric photorefraction intensity profiles in the human eye" J. Opt. Soc. Am. A (1995) 12(8):1647-1656. Roorda, Austin; Bobier, William R., "Geometrical technique to determine the influence of monochromatic aberrations on retinoscopy" J. Opt. Soc. Am. A (1996) 13(1):3-11. Roorda, Austin; Campbell, Melanie C.W. and Bobier, William R., "Slope-based eccentric photorefraction: theoretical analysis of different light source configurations and effects of ocular aberrations" J. Opt. Soc. Am. A (1997) 14(10):2547-2556. Schaeffel, Frank; Weiss, Stefan; Seidel, Jorg, "How good is the match between the plane of the text and the plane of focus during reading?" Opthal. Physiol. Opt. (1999) 19(2):180-192. Seddon, Johanna and Fong, Donald, "A Survey of Vision Screening Policy of Preschool Children in the United States" Survey of Opthalmology (1999) 43(5):445-457. Simons, Brad D.; Siatkowski, R. Michael; Schiffman, Joyce C.; Berry, Barbara E.; Flynn, John T., "Pediatric Photoscreening for Strabismus and Refractive Erros in a High-risk Population" Opthalmology 106(6):1073-1080. Simons, Kurt, "Vision Screening Techniques: A Survey" pp. 56-96. Tong, Patrick, Y.; Bassin, Roger E.; Enke-Miyazaki, Errin; Macke, Jennifer P.; Tielsch, James M.; Stager, David R.; Beauchamb, George R.; Parks, Marshall M.; The National Children's Eye Care Foundation Vision Screening Study Group, "Screening for Amblyopia in Preverbal Children with Photoscreening Photographs" Opthalmology (2000) 107(9):1623-1636. Wesemann, Wolfgang; Norcia, Anthony M.; Allen, Dale, "Theory of eccentric photorefraction (photoretinoscopy): astigmatic eyes" J. Opt. Soc. Am. A (1991) 8(12):2038-2047. Williamson, T H; Keating, D, "Telemedicine and computers in diabetic retinopathy screening" British Journal of Opthalmology (1998) 82:5. Prasad, Somdutt; Jones, Karen; Phillips, Russell P. "Telemedicine and computers in diabetic retinopathy screening" Br J Opthalmol (1998) 82:849. Wooton, Richard, "Telemedicine: a cautious welcome" BMJ (1996) 313:1375-1377.