1,721,004 research outputs found
Distribution of mesozooplankton resting eggs in seabottom sediments of Thermaikos gulf (NW Aegean Sea, Greece) and possible effects of sediment resuspension.
Full text linkThe distribution of mesozooplankton resting eggs was studied in the bottom sediments of Thermaikos Gulf (Aegean Sea, Greece), to study possible effects of sediment resuspension on egg assemblages, due to physical forcing (storm events) and/or anthropogenic activity (trawling). The total abundance of eggs in sediments was higher at stations located close to the rivers’ mouths, with muddy sediments, and with the water column richer of zooplankton, than at stations located at greater depths and with muddy-sand bed sediments. At the former stations the vertical distribution of eggs has revealed a trend of homogenization within the sediment column, from September to February. This is related probably to the sediment re-suspension. At the latter stations, no clear temporal variability in the vertical distribution was detected. The eggs found in the bottom sediments of Thermaikos Gulf were assigned to 16 morpho-types. Amongst these, those assigned to Paracartia latisetosa and Labidocera wollastoni (as well as one type called Calanoida 3), were found to be dominant at all the stations and during all the sampling periods, both as full and empty eggs
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
Studio dell’efficacia del Donepezil sulle funzioni cognitive nel trattamento farmacologico di pazienti affetti da schizofrenia
No full textI disturbi cognitivi associati alla schizofrenia rappresentano uno
degli obiettivi principali nel trattamento farmacologico dei soggetti
affetti da tale patologia. È noto che l’acetilcolina è il principale neurotrasmettitore
coinvolto nella modulazione dei processi cognitivi quali
attenzione, memoria e funzioni esecutive. L’utilizzo di anticolinesterasici,
in associazione al trattamento con antipsicotici atipici, potrebbe
migliorare le funzioni cognitive di soggetti affetti da schizofrenia.
Lo studio ha coinvolto un gruppo di 14 soggetti affetti da schizofrenia.
I soggetti sono stati suddivisi in due gruppi in base al trattamento
farmacologico utilizzato. Un primo gruppo di otto soggetti (gruppo in
monoterapia), è stato trattato esclusivamente con antipsicotici atipici
(risperidone); il secondo, composto da sette soggetti (gruppo donepezil
+ risperidone).
I soggetti sottoposti a trattamento con risperidone + donepezil
evidenziavano, dopo tre mesi e dopo sei mesi, miglioramenti statisticamente
significativi nelle capacità attentive, nelle funzioni esecutive e
nella comprensione delle storie di Teoria della Mente di primo ordine,
non riscontrati nel gruppo di controllo.
Conclusioni. L’utilizzo di donepezil in associazione all’antipsicotico,
come gia evidenziato da altri autori (MacEwan, 2001), è efficace,
nel trattamento di soggetti affetti da schizofreniain particolare per il
miglioramento delle capacità attentiveSchizophrenia generally manifests cognitive disorders of subjects
affected by this illness.
Acetylcholine is the main neurotrasmettitor involved in the
modulation of cognitive processes as attention, memory and executive
functions. The aim of our study is to examine the effects of
anticholinesterasic drugs in addiction to atypical antipsychotics on
cognitive functions in subjects with schizophrenia.
Participant to the study 14 subjects affected by schizophrenia.
Subjects have been divided in two sub-groups on the grounds of pharmachological
treatment used. A first group (N= 8) it’s been treated only
with risperidone (monotherapy group); the second one (N=7) it’s been
treated with donepezil in addition to risperidone (donepezil+ risperidone
group). The group treated with donepezil + risperidone evidenced,
after 3 and 6 months, statistically significant improvements in attention,
in executive functions and in understanding first order Theory of
Mind. Our findings are in agreement with those reported by MacEwan
et al. (26). Even if preliminary, our results prove the effectiveness of
using anticholinesterasics drugs in addition to atypical antipsychotic
treatment, especially in improving attentive functioning
Augmentation con L-alfa-glicerofosforiletanolamina e omega polienoici in pazienti affetti da demenza mista già in trattamento con acetilcolinesterasi
No full textVariations 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
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