Search results for "Library science"

A Primer on Carnot Groups: Homogenous Groups, Carnot-Carathéodory Spaces, and Regularity of Their Isometries

2017

AbstractCarnot groups are distinguished spaces that are rich of structure: they are those Lie groups equipped with a path distance that is invariant by left-translations of the group and admit automorphisms that are dilations with respect to the distance. We present the basic theory of Carnot groups together with several remarks.We consider them as special cases of graded groups and as homogeneous metric spaces.We discuss the regularity of isometries in the general case of Carnot-Carathéodory spaces and of nilpotent metric Lie groups.

Data granularity in mid-year life table construction

2020

[EN] Life tables have a substantial influence on both public pension systems and life insurance policies. National statistical agencies construct life tables from death rate estimates (𝑚���𝑥���), or death probabilities (𝑞���𝑥��� ), after applying various hypotheses to the aggregated figures of demographic events (deaths, migrations and births). The use of big data has become extensive across many disciplines, including population statistics. We take advantage of this fact to create new (more unrestricted) mortality estimators within the family of period-based estimators, in particular, when the exposed-to-risk population is computed through mid-year population estimates. We use actual d…

Ocena jakości informacji w wybranych polskich katalogach stron WWW

2017

Mechanism change in a simulation of peer review: from junk support to elitism

2014

Abstract Peer review works as the hinge of the scientific process, mediating between research and the awareness/acceptance of its results. While it might seem obvious that science would regulate itself scientifically, the consensus on peer review is eroding; a deeper understanding of its workings and potential alternatives is sorely needed. Employing a theoretical approach supported by agent-based simulation, we examined computational models of peer review, performing what we propose to call redesign, that is, the replication of simulations using different mechanisms. Here, we show that we are able to obtain the high sensitivity to rational cheating that is present in literature. In additio…

The influence of Elfreda Chatman's theories: a citation context analysis

2018

The range of theoretical frameworks currently being used by researchers into information behaviour is abundant and diverse. We need to examine thoroughly the contribution of theories and models to further research, as this would help to improve future investigations in the field. This paper adopts this approach, by thoroughly examining the influence that Elfreda Chatman's three middle-range theories have had on subsequent research. A citation context analysis was carried out on the basis of those received by Information poverty theory, life in the round theory and normative behaviour theory. Analysis covered the year of publication, the type of work and the subject-matter of the citing docu…

RePEc o cómo proveer servicios de valor añadido a una comunidad de investigadores

2013

Se describe RePEc (Research Papers in Economics), uno de los repositorios temáticos más antiguos y con más contenido de los existentes. Se presta especial atención a los servicios de valor añadido que ofrece y que convierten a RePEc en una iniciativa única, con una gran aceptación dentro de su disciplina. Finalmente se hace una breve referencia al modelo de negocios que se utiliza y que se basa en el trabajo voluntario de miles de personas de todo el mundo.

Women in (neuro)science: report of a meeting held at the University of Valencia, Spain, in February 2018

2018

February 11th is the International Day of Women and Girls in Science. To mark this day, research centers and universities were invited by the Spanish Neuroscience Association to organize a symposium. Twenty-five centers in Spain participated in the event, with the intent of giving visibility to the existing problem of the scarcity of women compared with men in (neuro)science in positions of responsibility and command. Fourteen neuroscientists, all staff members of the University of Valencia, arranged the meeting. The morning included lectures by women neuroscientists in different phases of their career: a PhD student, a junior and a senior postdoctoral investigator, and a well-established …

The impact factor as a measuring tool of the prestige of the journals in research assessment in mathematics

2016

The (2-year) Impact Factor of Thomson-Reuters (IF) has become the fundamental tool for analysing the scientific production of academic researchers in a lot of countries. In this article we show that this index and the ordering criterion obtained by using it are highly unstable in the case of mathematics, to the extent that sometimes no reliability can be assigned to its use. We explain the reasons of this behaviour by the specific properties of the mathematical journals and publications, attending mainly the point of view of the researchers in pure mathematics. Using the Journal Citation Report list of journals as a source of information, we analyse the stability in the position of the math…

Research as Development: Biomedical Research, Ethics, and Collaboration in Sri Lanka, Salla Sariola, and Bob Simpson, Ithaca, NY: Cornell University …

2019

Research on Spectroscopy in Morocco from 1984 to 2006

2007

Abstract The evolution of spectroscopy‐based research activity in Morocco was evaluated on the basis of publications that have appeared in the Science Citation Index, Expanded (SCI), during the cumulative period 1984–2006 (September). The most active research groups, and their universities or centers, were identified in this subject from their scientific production in the first years of this century. The preference to publish in specific journals, the main areas of interest to Moroccan authors, and the spectroscopy techniques most commonly employed for their studies were also appraised. This scientometric study was undertaken to introduce a group of papers in a special issue of Spectroscopy…