1,720,961 research outputs found
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
Bioclimatic analysis of potential worldwide production of spring-type camelina [Camelina sativa (L.) Crantz] seeded in the spring
Full text linkCamelina [Camelina sativa (L.) Crantz] is a Brassicaceae oilseed that is gaining interest
worldwide as low-maintenance
crop for diverse biobased applications. One of
the most important factors determining its productivity is climate. We conducted a
bioclimate analysis in order to analyze the relationship between climatic factors and
the productivity of spring-type
camelina seeded in the spring, and to identify regions
of the world with potential for camelina in this scenario. Using the modelling tool
CLIMEX, a bioclimatic model was developed for spring-seeded
spring-type
camelina
to match distribution, reported seed yields and phenology records in North America.
Distribution, yield, and phenology data from outside of North America were used
as independent datasets for model validation and demonstrated that model projections
agreed with published distribution records, reported spring-seeded
camelina
yields, and closely predicted crop phenology in Europe, South America, and Asia.
Sensitivity analysis, used to quantify the response of camelina to changes in precipitation
and temperature, indicated that crop performance was more sensitive to
moisture than temperature index parameters, suggesting that the yield potential
of spring-seeded
camelina may be more strongly impacted by water-limited
conditions
than by high temperatures. Incremental climate scenarios also revealed
that spring-seeded
camelina production will exhibit yield shifts at the continental
scale as temperature and precipitation deviate from current conditions. Yield data
were compared with indices of climatic suitability to provide estimates of potential
worldwide camelina productivity. This information was used to identify new areas
where spring-seeded
camelina could be grown and areas that may permit expanded
production, including eastern Europe, China, eastern Russia, Australia and New
Zealand. Our model is the first to have taken a systematic approach to determine
suitable regions for potential worldwide production of spring-seeded
camelina.Camelina [Camelina sativa (L.) Crantz] is a Brassicaceae oilseed that is gaining in-terest worldwide as low- maintenance crop for diverse biobased applications. One of the most important factors determining its productivity is climate. We conducted a bioclimate analysis in order to analyze the relationship between climatic factors and the productivity of spring- type camelina seeded in the spring, and to identify regions of the world with potential for camelina in this scenario. Using the modelling tool CLIMEX, a bioclimatic model was developed for spring- seeded spring- type camelina to match distribution, reported seed yields and phenology records in North America. Distribution, yield, and phenology data from outside of North America were used as independent datasets for model validation and demonstrated that model projec-tions agreed with published distribution records, reported spring- seeded camelina yields, and closely predicted crop phenology in Europe, South America, and Asia. Sensitivity analysis, used to quantify the response of camelina to changes in pre-cipitation and temperature, indicated that crop performance was more sensitive to moisture than temperature index parameters, suggesting that the yield potential of spring- seeded camelina may be more strongly impacted by water- limited con-ditions than by high temperatures. Incremental climate scenarios also revealed that spring- seeded camelina production will exhibit yield shifts at the continental scale as temperature and precipitation deviate from current conditions. Yield data were compared with indices of climatic suitability to provide estimates of potential worldwide camelina productivity. This information was used to identify new areas where spring- seeded camelina could be grown and areas that may permit expanded production, including eastern Europe, China, eastern Russia, Australia and New Zealand. Our model is the first to have taken a systematic approach to determine suitable regions for potential worldwide production of spring- seeded camelina
Camelina [Camelina sativa (L.) Crantz] seeds as a multi-purpose feedstock for bio-based applications
Full text linkCamelina [Camelina sativa (L.) Crantz] is an oilseed crop belonging to the Brassicaceae family that has attracted worldwide attention because of its agronomic and qualitative characteristics. This crop can adapt well to different environments and produce oil suitable for multiple bio-based uses. The most commonly measured and reported components of camelina seeds are fatty acids, proteins, and vitamins. However, they also contain specialized metabolites (SMs, formerly known as "secondary metabolites") retained in the meal, which have not been fully characterized. This work presents a long-term study conducted from 2015 to 2019 at the experimental farm of the University of Bologna (Italy), aimed at comparing six camelina cultivars (Cypress, Midas, 789-02, Pearl, Omega, and WUR) for their agronomic and oil-compositional parameters and the SM content and composition of their seeds. Cypress was the best genotype in terms of agronomic characteristics, i.e., stable and high seed yields and increased 1000-seed weight (TKW). Pearl and 789-02 were identified as the most suitable for specific bio-based applications because of the increased n-3:n-6 ratio of the oil. Among the SM classes, PAs, and flavonols were influenced by the growing conditions and genotype. Pearl was the cultivar in which specialized metabolites were affected most by variation in meteorological conditions. Therefore, this variety may represent a starting point for future research targeting the increase/decrease of specific SM classes and the desired content of specific fatty acids by selecting the growing environment. The content and composition of camelina SMs confirm its nature as a multi-use crop, corroborating its key role in the circular economy
The effect of year and variety on the nutritional value of Camelina sativa meal
Full text linkCamelina [Camelina sativa (L.) Crantz] is emerging as a promising crop due to its high oil content of seeds with a predominance of unsaturated fatty acids, and good protein content of defatted meal. This study investigated the nutritional composition of defatted camelina meal obtained from four varieties (three from Canada and one from Austria) grown in the Padana Plain (northern Italy) for four consecutive years (2016-2019). Statistical analyses were performed based on the collected data. Principal Component Analysis (PCA) revealed distinct nutritional profiles among varieties and growing seasons. Calena, the Austrian variety, exhibited good nutritional quality and stability over the years. Pearl showed an intermediate year-to-year stability but promising values for trypsin inhibitors, condensed tannins and in vitro digestibility. The anomalous quantity of rainfall recorded during the early stage of seed development in 2019 allowed us to state that extreme climatic events can significantly affect the seed composition of the camelina varieties. This makes it clear that varietal and environmental factors need to be considered to produce a crop that can be fed to livestock
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
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