Reliable prediction of the erosion rate sediment beds is important for many applications in coastal and river engineering. Theoretical understanding empirically derived scaling relations still lacking. This applies particular anomaly between low high Shields number conditions. In this work, process studied from perspective phase-averaged turbulent kinetic energy (TKE) equations. The multi-phase...

Background: Lead-based radiation shields are widely used in radiology departments to protect both workers and patients from any unnecessary exposure to ionizing radiation. Recently there has been a great deal of concern expressed about the toxicity of lead. Human lead toxicity is well documented. In that light, production of environmentally-friendly lead-free radiation shields with less weight ...

composites with micro- and nano-metal fillers has attracted the attention of researchers for radiation shielding applications. Lead toxicity and heaviness have oriented extensive research toward the use of non-lead composite shields. The present study aimed to systematically review the efficiency of the composite shields of various micro- and nano-sized materials as composite shields have been ...

CONTEXT Speculation exists that use of a full face shield by ice hockey players may increase their risk of concussions and neck injuries, offsetting the benefits of protection from dental, facial, and ocular injuries, but, to our knowledge, no data exist regarding this possibility. OBJECTIVE To determine the risk of sustaining a head or neck injury among intercollegiate ice hockey players wea...

PURPOSE To establish the protective efficacy against late complications of electron therapy using customized lead eye shields in cases with orbital and periorbital lesions. METHODS Between 1982 and 2006, 16 patients with 22 orbital and periorbital lesions were treated by electron therapy. Customized lead eye shields were prepared and placed in the respective patients' eyes during each fractio...

Multiagent chemotherapy as neoadjuvant treatment for multifocal intraocular retinoblastoma. Ophthalmology. 2001;108:2106-2115. 9. Madreperla SA, Hungerford JL, Cooling RJ, Sullivan P, Gregor Z. Repair of late retinal detachment after successful treatment of retinoblastoma. Retina. 2000;20:28-32. 10. Baumal CR, Shields CL, Shields JA, Tasman WS. Surgical repair of rhegmatogenous retinal detachme...

OBJECTIVE To identify specific risk factors for concussion severity among ice hockey players wearing full face shields compared with half face shields (visors). METHODS A prospective cohort study was conducted during one varsity hockey season (1997-1998) with 642 male ice hockey players (median age 22 years) from 22 teams participating in the Canadian Inter-University Athletics Union. Half of...