1,720,972 research outputs found
Metodologia di ottimizzazione delle prestazioni di un propulsore ibrido di tipo parallelo
No full text
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
Jak2 mutation expands the thrombophilic panel in children
No full textCerebral sinus venous thrombosis (CSVT) is an important cause of vascular accidents in children. The diagnosis of the underlying disease allows appropriate and timely management of the risk factors and guide therapy, but the etiology remains unknown in 20% to 25% of the cases. We present the first case of a child presenting with CSVT caused by the Janus Kinase 2 (JAK2) V617F mutation, occurring without the hematological abnormalities diagnostic for myeloproliferative neoplasms. We therefore suggest including the molecular study of the JAK2 gene in the coagulation panel of all children affected by CSVT of unknown cause
Two cases of favism: From diagnosis to management
No full textGlucose-6-phosphate dehydrogenase deficiency (G6PD) is the most common red blood cells enzymopathy that affects 400 million people worldwide and is especially prevalent in areas of high malaria infection. G6PD deficiency has an X-linked recessive mode of inheritance and most known mutations in the G6PD gene decrease the enzyme stability. Oxidative stress, e.g. ingestion of fava beans, can induce acute haemolytic anaemia in affected individuals. The paper describes the case of two 6-month and 5-year-old male children with an acute haemolytic crisis due to the ingestion of fava beans. Due to increased immigration, the condition is expected to occur more often in Italian healthcare centres
Sustainable trasportation systems: dynamic routing optimization for a last-mile distribution fleet
No full textLogistics costs control has always been considered a key issue for business development. In order to decrease transportation costs, companies are pushed to negotiate lower logistic service prices with Third-Party Logistics Service Providers (3PL) which, in turn, should be able to optimize their processes and reduce their costs in order to preserve the adequate profitability and allow their industrial customers to gain competitive advantage. In this paper a method to reduce industrial costs and negative externalities associated with fleet management on an Hub & Spoke transportation network is presented. We state that the Time Dependent VRP with Pick-up and Deliveries and Time Windows model may be the most suitable for goods distribution problem inside large cities. A dynamic version capable to consider road traffic along with variable congestion effects during the day has been created. Hence, we proposed a quick and flexible heuristic that has been validated with the real data of a subsidiary of a 3PL leader in the express transportation sector. The heuristic has demonstrated to be able to reduce travel time, travelled distance and, at the same time, significantly increase the service level, on top of the relative benefit for the community coming from a substantial reduction of air pollution, noise pollution, congestion and incidentally
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
Depannage and other maintenance strategies for transportation fleets
Full text linkThis paper addresses the problem of designing a depannage service network for freight transportation fleets in order to fill up an evident gap in Operations Management literature. As a matter of
fact, breakdowns have a significant impact on service level and an efficient and effective assistance service is needed in order to guarantee competitive advantage. Aiming at laying the foundations for further research on modelling and solving the considered problem, a literature review is performed for identifying analogies with other problems, already approached in the past, and stating the problem. Finally, parameters, decision variables and objective function that should be considered for modelling and solving the problem are proposed, trying to stimulate the discussion on a new research theme and, more specifically, on the integration of decisions at strategic, tactical and operational level into a systemic model
- …
