Sentinels for the Identification of Pollution in Domains with Missing Data

Abstract

Sentinel method introduced in the study of problems with incomplete data, particularly in the context of distributed systems where pollution terms may arise at the boundary. The idea of sentinel likely involves constructing a surrogate or placeholder value that helps account for missing data or uncertainties in the system. Weakly sentinel appears to be a modification or extension of the concept of a sentinel specifically tailored for estimating pollution terms in distributed systems with missing data. The term weakly might suggest that this sentinel is not as robust or precise as the ideal sentinel, but it serves a similar purpose in providing estimates or approximations in situations where complete data is not available.