1,720,981 research outputs found
Women in science: la masterclass di Cagliari.
No full textIl Dipartimento di Fisica dell'Università di Cagliari organizza da due anni una masterclass dedicata a bambine e ragazze in occasione dell'{International Day of Women and Girls in Science. Obiettivo dell'iniziativa, organizzata in collaborazione con la sezione locale dell'INFN ed inserita nell'ambito del Piano Lauree Scientifiche, è contrastare la differenza di genere ed avvicinare le ragazze alla Fisica. Bambine e ragazze provenienti da tutta la Sardegna sono coinvolte in attività di laboratorio con la supervisione di giovani ricercatrici. L'iniziativa è caratterizzata da un discussiongame sulle differenze di genere e dal video-collegamento con le ricercatrici del CERN di Ginevra
A THREE YEARS PILOT STUDY TO EVALUATE FLUORESCENCE ANALYSIS IN OZONE BIOMONITORING WITH BEAN CLONES NEAR ROME, ITALY
No full textAn ozone (O3) biomonitoring experiment was conducted during the years 2008, 2009 and
2010 in a natural area inside the Castelporziano Presidential Estate (Rome, Italy),
characterized by a typical Mediterranean climate (Manes et al., 1997). Following the UNECE
ICP Vegetation protocols (UNECE, 2008-2010), the O3-sensitive (S156) and ozone-resistant
(R123) genotypes of Phaseolus vulgaris L. were used. 10 to 12 replicates plants per clones,
fully irrigated, were exposed to ambient air for approximately 60 days from mid July 2008
mid June 2009 and end of June, 2010. O3 concentrations and climatic parameters were
continuously monitored in the experimental site, leaf visible injury was evaluated weekly
every year and, at the end of each experiments, pods were harvested and yield evaluated.
Moreover, during the years 2009 and 2010, gas exchanges and direct chlorophyll “a”
fluorescence were measured on fully developed leaves, during selected phenological phases,
and in particular close to the onset of flowering. AOT40 during the experimental periods
(from day 0 to harvest) was 3588, 9273, and 3324 ppb in 2008, 2009 and 2010, respectively.
A clear distinction in the extent of visible leaf injury symptoms between the S and R biotypes
was apparent (UNECE- ICP Vegetation, 2009), although during 2010 also the R variety
showed injury symptoms. However, differently from what reported in previous studies
(Flowers et al., 2007) no clear relationship between the extent of leaf injury, pod yield and
ozone levels were evident across years: production of developed pods was in fact higher in the
R clone only in 2008 (S156/R123 = 0.86), and higher in the S clone during the years 2009 and
2010 (S156/R123 = 3.46 and 1.12 in 2009 and 2010, respectively). Stomatal conductance and
net photosynthesis in the 2009 assessment were slightly lower in the S than in the R clone,
while in the 2010 assessment the S clone had slightly higher gas exchange values, both before
and after flowering. The chlorophyll fluorescence measurements and the application of the
JIP-test (Strasser et al., 2010) give important insight for early evaluation of differences in
photosynthetic efficiency between genotypes. The fluorescence transients analysis highlights
a similar behaviour of both clones, and the OJIP fluorescence parameters did not show the
typical ozone-induced stress response. Both clones appear instead affected by the summer
climatic conditions, and particularly by high temperatures and irradiance values. Moreover,
this response seems to vary with plant developmental stages (Elagöz and Manning, 2005).
Further studies are therefore needed to better investigate the applicability of this
biomonitoring system under environmental conditions typical of the Mediterranean area
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
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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