177,897 research outputs found
The emerging role of cancer cell plasticity and cell-cycle quiescence in immune escape
No full textNo abstract availabl
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Virtual endoscopy of the middle and inner ear with spiral computed tomography. Neri E, Caramella D, Battolla L, Cosottini M, Scasso CA, Bruschini P, Pingitore R, Bartolozzi C
No full text"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Violent fight and facial patterns in the host colony takeover by the cuckoo wasp Polistes sulcifer.
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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
Border-line headache
No full textBACKGROUND: The authors, after a thorough review of the literature, and on the basis of personal clinical experience, propose a new approach to the resolution of pain symptomology of border-line cephalea (a pathology as much debated as it is diffused). Therefore, they suggest an interdisciplinary therapeutic protocol. METHODS: After a careful examination of the triggering causes of pain symptomology, they examined 24 patients. They were examined at the out-patient clinic of the Institute of Oral and Maxillo-Facial Surgery, Second University of Study of Naples. With the aid of a questionnaire they gathered the anamnestic data; and, after an objective clinical examination the patients were submitted to neurologic examination. Working together with a neurologist, the patients were firstly examined individually and then, based upon differential differences in symptomatology, they were subdivided into three experimental groups in order to facilitate the association of the therapy to the groups and make follow-up easier. RESULTS: The results were encouraging and demonstrated the necessity to study the patients affected by this type of pathology with a pluridisciplinary approach: gnatologic, psychologic, and neurologic. CONCLUSIONS. Therefore, the importance, if not the necessity, of an interdisciplinary approach is underlined. The authors want to emphasize the importance of not focusing on only one aspect of this kind of pathology, but it must be considered in a wider field including more than one discipline
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