Star clusters near and far; tracing star formation across cosmic time

© 2020 Springer-Verlag. The final publication is available at Springer via https://doi.org/10.1007/s11214-020-00690-x.Star clusters are fundamental units of stellar feedback and unique tracers of their host galactic properties. In this review, we will first focus on their constituents, i.e.\ detailed insight into their stellar populations and their surrounding ionised, warm, neutral, and molecular gas. We, then, move beyond the Local Group to review star cluster populations at various evolutionary stages, and in diverse galactic environmental conditions accessible in the local Universe. At high redshift, where conditions for cluster formation and evolution are more extreme, we are only able to observe the integrated light of a handful of objects that we believe will become globular clusters. We therefore discuss how numerical and analytical methods, informed by the observed properties of cluster populations in the local Universe, are used to develop sophisticated simulations potentially capable of disentangling the genetic map of galaxy formation and assembly that is carried by globular cluster populations.Peer reviewedFinal Accepted Versio

A REVIEW OF PULSE-COLUMN FLOODING DATA AND CORRELATIONS WITH PROPOSED METHODS OF CORRELATION

Progress is reported in assembling available unclassified flooding data in perforated-plate pulsed extraction columns through January 1, 1963. Existing correlations are critically reviewed, and recommendations are made to develop a better flooding correlation. (auth

SAFETY REQUIREMENTS FOR THE DESIGN OF RADIOCHEMICAL PROCESSING FACILITIES

Safety requirements to be used in establishing standardized safety practices and procedures for engineering design of radiochemical processing facilities are presented. Revision and expansion of future issues are planned. (J.R. D.

Chemical flowsheet conditions for preparing urania spheres by internal gelation

Small, ceramic urania spheres can be prepared for use as nuclear fuel by internal chemical gelation of uranyl nitrate solution droplets. Decomposition of hexamethylenetetramine (HMTA) dissolved in the uranyl nitrate solution releases ammonia to precipitate hydrated UO/sub 3/. Previously established flowsheet conditions have been improved and modified at ORNL and have been applied to prepare dense UO/sub 2/ spheres with average diameters of 1200, 300, and 30 ..mu..m