305,128 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Preoperative and postoperative monitoring of the patients with severe internal carotid artery stenosis [Monitoraggio pre e post operatorio dei pazienti con stenosi carotidea critica]
No full textThe Authors develop a clinical trial to monitoring the patients with severe internal carotid artery (ICA) stenosis before and after the surgical procedure of thromboendarterectomy (TEA). Preoperative evaluation selects the patients giving hemodynamic information to optimize the surgical indications and defining postoperative prognosis of the patients. Preoperative data include brain CT scan, cardiologic and TSA color coded ultrasonography evaluation (energy color-Doppler) to define morphological characteristics and exact percentage of carotid artery stenosis, transcranial color imaging (TCI) for intracranial vessels (communicating arteries), blood flow velocity and vasogenic reserve. Clinical and technical hemodynamic data are related to cerebral and TSA digital angiography and surgical indications. Intraoperative monitoring is obtained evaluating the residual pressure in ICA after clamping the common carotid artery and transcranial cerebral oximetry. Postoperative monitoring of patients include TSA and transcranial evaluation one, three and six months after surgery. The Authors related clinical characteristics of five patients with ICA stenosis: in some patients bilateral stenosis is present with hemodynamic blood support of cerebral posterior circulation. In this trial the most important data is the lost of cerebral vasogenic reserve also in the other contralateral side in the most severe ICA stenosis. Postoperative recovery of cerebral vasogenic reserve has been good in four patients; in the last patient a further examination after a longer interval of time has been requested. The surgical results has been good in all the cases, without any complications
Post-traumatic epidural cervical abscess (Escherichia coli) [Ascesso cervicale epidurale post-traumatico da Escherichia coli e revisione della casistica]
No full textAbscess formation in the spinal epidural space is a rare lesion. Despite modern medical advances, the morbidity and mortality rates asseciated with spinal epidural abscess remain significant, and the diagnosis is often elusive. Post-traumatic epidural abscess of the cervical spine is reported in a 51 year old man. RM imaging of the spinal cord allowed for prompt diagnosis. At the operation the culture of the abscess drainage grew Escherichia Coli
A zero dimensional model for simulation of TRIGA Mark II dynamic response
No full textAim of this work is to reproduce the dynamic behavior of the TRIGA Mark II reactor of the University of Pavia on the entire operative power range (i.e. 0–250 kW) using a zero dimensional approach. In this work the coupling between neutronics and thermal-hydraulics in natural circulation has been considered. In specific, a point reactor kinetics model with one energy group and six delayed neutron precursors groups has been adopted while for thermal-hydraulics modeling two regions have been defined (i.e. the fuel and the coolant). The nonlinear system of coupled Ordinary Differential Equations has been solved by means of MATLAB Simulink®, which represents a reliable tool for dynamic and control analysis. The model has then been validated through the comparison with a set of experimental data collected in four different reactor power transients, obtaining a very satisfying agreement. Finally, the linear stability analysis of the TRIGA reactor has been performed by means of the root locus, finding out that the power level at which reactor is operating deeply influences the position of the poles of the transfer function between control rod height and neutron density. These results can then be employed as a reliable starting point in designing an automatic device for reactor power control
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
Mining e-mail content for author identification forensics
No full textWe describe an investigation into e-mail content mining for author identification, or authorship attribution, for the purpose of forensic investigation. We focus our discussion on the ability to discriminate between authors for the case of both aggregated e-mail topics as well as across different email topics. An extended set of e-mail document features including structural characteristics and linguistic patterns were derived and, together with a Support Vector Machine learning algorithm, were used for mining the e-mail content. Experiments using a number of e-mail documents generated by different authors on a set of topics gave promising results for both aggregated and multi-topic author categorisation
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