1,721,068 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Relationships of a detailed mineral profile of meat with animal performance and beef quality
Full text linkThe mineral profile of beef is a subject of human health interest, but also animal performance and meat quality. This study analyzes the relationships of 20 minerals in beef inductively coupled plasma-optical emission spectrometry (ICP-OES) with three animal performance and 13 beef quality traits analyzed on 182 samples of Longissimus thoracis. Animals’ breed and sex showed limited effects. The major sources of variation (farm/date of slaughter, individual animal within group and side/sample within animal) differed greatly from trait to trait. Mineral contents were correlated to animal performance and beef quality being significant 52 out of the 320 correlations at the farm/date level, and 101 out of the 320 at the individual animal level. Five latent factors explained 69% of mineral co-variation. The most important, “Mineral quantity” factor correlated with age at slaughter and with the beef color traits. Two latent factors (“Na + Fe + Cu” and “Fe + Mn”) correlated with performance and beef color traits. Two other (“K-B-Pb” and “Zn”) correlated with beef chemical composition and the latter also with carcass weight and daily gain, and beef color traits. Beef cooking losses correlated with “K-B-Pb”. Latent factor analysis appears be a useful means of disentangling the very complex relationships that the minerals in beef have with animal performance and beef quality traits
Reporting of immune checkpoint inhibitor-associated myocarditis
No full textAs reported by the authors, the absence of concomitant cardiovascular or antidiabetic drugs in 75% of all cases could suggest that pre-existing cardiac disorders or cardiovascular risk factors would not predispose patients to develop immune checkpoint inhibitor-associated myocarditis. A more precise analysis of potential predisposing conditions could have been done by capturing comorbidities, such as we have done in a study that we have just finished and submitted for peer-review
Impact on Performance, Emissions and Thermal Behavior of a New Integrated Exhaust Manifold Cylinder Head Euro 6 Diesel Engine
No full textThe integration of the exhaust manifold in the engine cylinder head has received considerable attention in recent years for automotive gasoline engines, due to the proven benefits in: engine weight diminution, cost saving, reduced power enrichment, quicker engine and aftertreatment warm-up, improved packaging and simplification of the turbocharger installation. This design practice is still largely unknown in diesel engines because of the greater difficulties, caused by the more complex cylinder head layout, and the expected lower benefits, due to the absence of high-load enrichment. However, the need for improved engine thermomanagement and a quicker catalytic converter warm-up in efficient Euro 6 diesel engines is posing new challenges that an integrated exhaust manifold architecture could effectively address.
A recently developed General Motors 1.6L Euro 6 diesel engine has been modified so that the intake and exhaust manifolds are integrated in the cylinder head. Extensive CAD/CAE/CAM analyses have been employed in order to guide the design of the overall surface and the water cooling jacket that surround the exhaust manifold of the new engine version, and thus to be able to improve the low-frequency thermal fatigue resistance of the head.
The thus obtained prototype engine head has been tested on a highly-dynamic test bench at the Politecnico di Torino in order to characterize performance, emissions and thermal behavior in comparison to the baseline production engine.
The results have generally been very promising and have shown the possibility of maintaining the same performance rating over the overall engine speed range as well as comparable emissions and brake specific fuel consumption in steady-state conditions. Furthermore, appreciably faster engine and aftertreatment warm-up have been recorded due to the higher heat fraction that is transferred to the coolant and to the more favorable exhaust gas enthalpy management. The latter benefit is in fact very interesting as far as the control of HC and CO emissions within the NEDC homologation is concerned
Pharmacovigilance Teaching to Undergraduates of Medicine and Surgery School: the Experience of Verona University
No full textBackground/Introduction: Teaching pharmacovigilance (PV) to undergraduates of Medicine and Surgery School is an educational objective of great importance. Their acquisition of theoretical bases and practical skills in detecting and reporting adverse drug reactions (ADRs) is an essential pre-requisite for their future contribution to pharmacovigilance activities. Unfortunately, at national level pharmacovigilance is not compulsory within the Degree Course of Medicine and Surgery (MD) in Italy and its introduction within the course of Pharmacology depends on the individual initiative of some professors. Objective/Aim: Pharmacovigilance teaching to undergraduates of Medicine and Surgery School at University’s Verona, Italy. Methods: The teaching methods included 15 h of frontal teaching, problem based learning (PBL) and problem solving (PS). The course aimed to the development of pharmacovigilance knowledge and skills and focused on basis of pharmacovigilance, regulatory aspects and benefit/ harm assessment. With regard to PBL and PS, students, divided into groups with the presence of a tutor, were trained on drug–drug interactions, medical diagnosis, recognizing, managing and reporting ADRs through the analysis of a clinical case report. At the end of the course the students’ knowledge was assessed through an oral exam. Results: At the University of Verona pharmacovigilance has been taught within the Degree Course of MD for at least 20 years, since the professors of Pharmacology are involved in the activities of the Regional PV Centre. Until last year the teaching of pharmacovigilance was only among the training objectives of the Pharmacology course, whereas, starting from the academic year 2017–2018, the course has been divided into two modules: General/Special Pharmacology (8 Educational Credits-ECTS) and Pharmacovigilance (1 ECTS), both carried out during the fourth year of education (120 students). At the conclusion of the PV module students: [were able to understand the mechanisms of ADRs, [were able to understand the classification of ADRs, [knew the epidemiological data on ADRs, [were able to fill in a reporting form. Conclusion: Teaching PV is particularly important for MD students, since their knowledge on PV can influence their future ability to prescribe and monitor drug therapies. As a matter of fact, a physician who has the ability to identify ADRs and the habit of reporting them, will certainly pay attention to all aspects related to the patient’s health and consequently to both positive and negative effects of a drug therapy
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
- …
