772 research outputs found
Comparing People with Bibliometrics
Bibliometric indicators, citation counts and/or download counts are
increasingly being used to inform personnel decisions such as hiring or
promotions. These statistics are very often misused. Here we provide a guide to
the factors which should be considered when using these so-called quantitative
measures to evaluate people. Rules of thumb are given for when begin to use
bibliometric measures when comparing otherwise similar candidates.Comment: to appear in Proceedings of Library and Information Science in
Astronomy VIII (LISA-8
Eigenvector Sky Subtraction
We develop a new method for estimating and removing the spectrum of the sky
from deep spectroscopic observations; our method does not rely on simultaneous
measurement of the sky spectrum with the object spectrum. The technique is
based on the iterative subtraction of continuum estimates and Eigenvector sky
models derived from Singular Value Decompositions (SVD) of sky spectra, and sky
spectra residuals. Using simulated data derived from small telescope
observations we demonstrate that the method is effective for faint objects on
large telescopes. We discuss simple methods to combine our new technique with
the simultaneous measurement of sky to obtain sky subtraction very near the
Poisson limit.Comment: Accepted for publication in The Astrophysical Journal (Letters) 2000
March 7. Includes one extra figure which did not fit in a lette
A History of Cluster Analysis Using the Classification Society's Bibliography Over Four Decades
The Classification Literature Automated Search Service, an annual
bibliography based on citation of one or more of a set of around 80 book or
journal publications, ran from 1972 to 2012. We analyze here the years 1994 to
2011. The Classification Society's Service, as it was termed, has been produced
by the Classification Society. In earlier decades it was distributed as a
diskette or CD with the Journal of Classification. Among our findings are the
following: an enormous increase in scholarly production post approximately
2000; a very major increase in quantity, coupled with work in different
disciplines, from approximately 2004; and a major shift also from cluster
analysis in earlier times having mathematics and psychology as disciplines of
the journals published in, and affiliations of authors, contrasted with, in
more recent times, a "centre of gravity" in management and engineering.Comment: 23 pages, 9 figure
Of Course a Handgun Can Take down a Helicopter: Cultivation Effects of Military-Style Video Games
The goal of this study is to add to the literature that extends the theory of cultivation into the realm of video games. Video game studies incorporating cultivation stress the importance of specifying a single genre of video games and measuring the cultivation effect, due to the lack of homogenous content between video games. It is possible that video games are actually an antithesis to the theory of cultivation because of content that is user-generated, which not only dissolves homogeneity between different games, but also the same game. Cultivation research has also suggested that second- order cultivation effects (on attitudes and beliefs) are moderated by factors that affect the experience during the encounter of information. This study looks at exposure to military-style video games to help better understand how video games may lead to a variety of cultivation effects. It includes measures of the independent variables of video game habits, gaming skill, traditional media use, political orientation, and contact with the military, and the dependent variables of first- and second-order cultivation effects, and self-efficac
- …