First posted January 29, 2021 For additional information, contact: Contact Information, Menlo Park, Calif. Office—Earthquake Science CenterU.S. Geological Survey345 Middlefield Road, MS 977Menlo CA 94025 Changes in fault roughness with scale, “scaling,” is the topic of this report; changes are considered using a general power law relation between some measure surface height, H, and another leng...

Insight about the operation of froth flotation through modelling has been in existence since early 1930s. Irrespective numerous industrial models that have developed over years, metallurgical outputs often do not involve pulp chemistry variables. As such, this work investigated influence variables (pH, Eh, dissolved oxygen and temperature) on prediction performance rougher copper recovery using...

Hydroxyapatite (HA) powders are ultrasonically dispersed in the precursor of fluoridated hydroxyapatite (FHA) or fluorapatite (FA) to form a "colloidal sol". HA/FA biphasic coatings are prepared on Ti6Al4V substrate via dip coating, 150 degrees C drying and 600 degrees C firing. The coatings show homogenous distribution of HA particles in the FA matrix. The relative phase proportion can be tail...

In this paper, we study the determination of the shape of an obstacle with rough boundary (not necessary Lipschitz) from its scattering amplitude. Following the technique used in paper [6], we obtain an extension of the local uniqueness result for Lipschitz obstacles to rougher ones. We also give a criterion to identify a ball in R 3 from its scattering amplitude.

PURPOSE This study investigated the influence of surface conditioning procedures and repeated firings on monoclinic content and strength of zirconia before cementation. MATERIALS AND METHODS Sintered bar-shaped zirconia specimens were subjected to no surface treatment (control), air abrasion, or grinding (n=21). Their roughness was evaluated using a profilometer, and microscope analysis was p...