A major motivation for the definition of an efficient subclass of link matrices was for the modeling of Boolean operators
. In Section 5, we discuss experimentation that resulted in the development of PIC matrices for the modeling of Boolean operators
that appear to be superior to those previously used in the INQUERY system.
Second major characteristic is, by default PubMed adds Boolean operators
into user queries and uses automatic term mapping (ATM).
Steps were defined as each webpage visited, each mouse-click or keystroke action, each search term used, Boolean operators
used, and browser navigational and non-navigational menu items used.
Also there are weighs for Boolean operators
in queries, where each Boolean operator
has a weight within range of values as in terms weights; such as [0, 1].
It also covers study design filters, Boolean operators
, citation management, search documentation, and strategies for updating the search.
The students' skill in the use of Boolean operators
for literature search was assessed in the pre and post-test.
Unlike most other sites, it offers not only browsing and a simple keyword search option, but also an advanced search with Boolean operators
. Again, most usable content here is proprietary.
There is a simple "fill in the panel" basic search and advanced search that has Boolean operators
, phrase searching, and searching by Twitter hashtag, site, domain, tweeter, date, or format (tweets, links, photos, and videos).
In three modules, it introduces basic IL concepts such as types of sources, popular and scholarly publications, search strategies and Boolean operators
. Being online, students can complete it on their own time, and gain some theoretical knowledge before their in-library session.
It's easy to fall into the rut of popping up a search box and describing the wonderful Boolean operators
or the pretty layout of the user interface.
By using advanced search forms or boolean operators
, you can combine terms.
Knowledge Finder version 4.0 is a "gentle slope interface," which gives novice users answers to their questions using a natural language interface, and then gradually introduces them to additional database searching utilities such as Boolean operators
and thesaurus browsing.