Second Order Operators in the NASA Astrophysics Data System

Abstract

Second Order Operators (SOOs) are database functions which form secondary queries based on attributes of the objects returned in an initial query; they can provide powerful methods to investigate complex, multipartite information graphs. The NASA Astrophysics Data System (ADS) has implemented four SOOs, reviews , useful , trending , and similar which use the citations, references, downloads, and abstract text. This tutorial describes these operators in detail, both alone and in conjunction with other functions. It is intended for scientists and others who wish to make fuller use of the ADS database. Basic knowledge of the ADS is assumed.

It Takes a Village

“…His thesis and directly related work was distinguished by state-of-the-art numerical modeling combined with compelling physical analysis. This is evidenced by application of the secondary “useful” operator (Kurtz, Chyla, and ADS Team, 2020 ) to the NASA/ADS database. The three papers that comprise George’s thesis are at the top of the list of 1707 useful papers you will find in this manner on the topic of chromospheric evaporation, behind only Hirayama’s seminal work mentioned in Section 3 .…”