1,721,000 research outputs found
BIORHYTHM AND ENVIRONMENTAL CONTROL IN THE LIFE HISTORY OF EPHYDATIA FLUVIATILIS (DEMOSPONGIAE, SPONGILLIDAE)
No full textDifferences between two sympatric species of Tethya (Porifera, Demospongiae) concerning the growth and final form of their megasters.
No full textTethya (Porifera, Demospongiae) species coexisting in a Maldivian coral reef lagoon: taxonomical, genetic and ecological data.
No full text
Cerebellar metastasis from prostatic carcinoma simulating, on CT-scan, a cerebellopontine angle tumor. Case report.
No full textThe authors report a rare case of cerebellar metastasis from prostatic carcinoma simulating on computerized tomography a cerebellopontine angle tumor. Solitary intracerebral metastases from prostatic cancer are infrequent, and their location in the posterior fossa with extension in the cerebellopontine angle is quite unusual. The differential CT findings from more common benign cerebellopontine angle tumors are briefly outlined
A case of pan-medullary astrocytoma in a child
No full textThe authors report a case of a Grade 2 astrocytoma with pan-medullary extension, from C1 to L2, in a little girl aged 12. It was successfully operated on. The clinical picture showed an initial acute paraplegia which suddenly turned into tetraplegia with respiratory insufficiency and second degree coma. Besides the rarity of the case, some atypical aspects are pointed out, such as the patient's youth and the partially aggressive character of the neoplasm. The surgical implications of such pan-medullary tumours are discussed, the authors emphasize the aspects that in their opinion indicate exploratory surgery and, when possible, total removal of the tumours
Reproductive cycles of the sympatric excavating sponges Cliona celata and Cliona viridis in the Mediterranean Sea.
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
- …
