Results 171 to 180 of about 5,879,079 (196)

A new model that generates Lotka's law

Journal of the American Society for Information Science and Technology, 2001
AbstractIn this paper, we develop a new model for a process that generates Lotka's Law. We show that four relatively mild assumptions create a process that fits five different informetric distributions: rate of production, career duration, randomness, and Poisson distribution over time, as well as Lotka's Law.
openaire   +2 more sources

Scientific Productivity, Lotka’s Law, and STEM Librarianship

Science & Technology Libraries, 2021
In this study, we examined the applicability of Lotka’s law by reviewing 590 STEM librarianship research articles published in seven journals between 2016 and 2019.
Clara Y. Tran, Selenay Aytac
openaire   +1 more source

Conservation laws for Lotka–Volterra models

Mathematical Methods in the Applied Sciences, 2003
AbstractWe derive necessary and sufficient conditions on a Lotka–Volterra model to admit a conservation law of Volterra's type. The result and the proof for the corresponding linear algebra problem are given in graph‐theoretical terms; they refer to the directed graph which is defined by the coefficients of the differential equation system. Copyright ©
openaire   +1 more source

Lotka’s law for the Brazilian scientific output published in journals

Journal of Information Science, 2018
Lotka’s law is a power law for the frequency of scholarly publications. We show that Lotka’s law cannot be dismissed after considering a massive sample of the number of publications of Brazilian researchers in journals listed on the SCImago Journal Rank and the Journal Citation Reports. For the SCImago Journal Rank, we found a power law with the Pareto
Sergio Da Silva, Marcelo Perlin, Raul Matsushita, André Alves Portela Santos, Takeyoshi Imasato, Denis Borenstein   +5 more
openaire   +2 more sources

Application of Lotka’s Law in Current Science Journal

Journal of Information Management, 2020
Purpose: The purpose of the study is to examine the application of Lotka’s law in current science journals. Aim: To investigate the scientific productivity of authorship patterns in current science journals. To verify the Lotka’s law using general power method (n?2) and inverse square method (n=2) and to analyse the frequency distribution of author’s ...
M. Thamaraiselvi, S. Lakshmi, M. Manthiramoorthi   +2 more
openaire   +1 more source

Analysis of Lotka's law: The Simon-Yule approach

Information Processing & Management, 1989
Abstract A major difficulty in using the well-known Lotka's law in information science is in the estimation of parameters. In this paper, we argue that the difficulty arises from the misuse of goodness-of-fit tests. As an alternative, we adopt Simon's five-step modeling process for the study of Lotka's law.
openaire   +2 more sources

The reflection of LOTKA's law in the structure of citations of a journal

Scientometrics, 1983
A complex structure measure for social groups was applied to the structure of citations in a journal. The citation structure reflected LOTKA's law on the various levels of group structure measure. On the first structure level the reciprocal effect of social and cognitive factors became discernible.
openaire   +1 more source

Productivity differences fields of learning, and Lotka's law

Scientometrics, 1989
The paper examines whether productivity differences among individual researchers are larger in some fields of learning than in others. Productivity patterns in the natural sciences, the medical sciences, the social sciences, and the humanities are compared by the use of unweighted and weighted publication counts. Irrespective of whether total number of
openaire   +1 more source

Lotka's Law and Authorship Distribution in the Journal of ‘Columbia Law Review’

Collnet Journal of Scientometrics and Information Management, 2014
This paper examines the validity of Lotka's law to authorship distribution on the subject Area “LAW”. In the process, we chose to consider the articles published under Columbia Law Review (CLR) since from its inception i.e. during 1901–2012 for the study. Lotka's law constituting the most significant bibliometric law is applied and tested using various
Kiran Savanur, S. Gayathri Devi, P. V. Konnur   +2 more
openaire   +1 more source

Validity of Lotka’s Law in Geology Literature

KIIT Journal of Library and Information Management
The present paper analyzes the pattern of authorship and various collaboration measures in the field of Geology literature during 1989-2020. The Web of Science database was used to download a total of 19,102 papers. These papers were published in the form of articles, reviews, and conference proceeding papers during 1989-2020.
Garvita Jhamb, null Meera
openaire   +1 more source