Abstract: Methods for selective measurement and monitoring of multiple base chemicals in processing solutions are provided. Methods include providing a processing solution including a plurality of base chemicals and performing a first analytical method, such as measuring a conductivity of the solution blend, in combination with a second analytical method, such as titration or pH measurements of the solution. From such measurements, a concentration of one or more base chemicals can be selectively determined. In such methods, multiple bases in a same processing solution are advantageously selectively measured and monitored accurately.

Abstract: Techniques including methods and apparatuses for inert real-time measurement and monitoring of metal and acid concentrations in a processing solution are provided. Methods include performing an analytical method (e.g., spectral measurements) of the processing solution to determine a metal concentration and performing another analytical method (e.g., density measurements) of the processing solution to determine an acid concentration with compensation of raw results based on the determined metal concentration. The determination of the acid concentration can also include compensation of raw results based on another analytical method (e.g., temperature measurements) of the processing solution. The analytical methods can be performed in any order or in parallel. Both metal and acid concentrations in the processing solution can therefore be inertly and continuously measured and monitored in real time.

Abstract: A software library recommendation engine provides an analysis and aggregate dashboard comparison of metrics denoting maintainability trends in a plurality of libraries from a publicly available software repository. Maintainability trends include regularity and magnitude of changes (commits), resolution of user inquiries for issues, problems and bugs, and an estimation of core contributors for estimating inertia and longevity of a plurality of candidate libraries under consideration for a particular usage. Usage metrics coalesce and summarize usage data of libraries under consideration for comparison, and a dashboard of computed metrics provides an indication of trends that indicate reliability or longevity to mitigate vulnerability of the library user from dependence on the collaborative intent of the library author and contributors.