1,721,002 research outputs found
Polycyclic Aromatic Hydrocarbon (PAH) pollution in wild Adriatic fish - from the main determining factors of PAH accumulation to some biological responses of fish
Full text linkQuesta tesi si focalizza su 16 idrocarburi policiclici aromatici (IPA), classificati come inquinanti prioritari
dall’Unione Europea (EU) e dall’Agenzia per la Protezione Ambientale degli Stati Uniti (US EPA), per i loro
effetti cancerogeni e mutageni. Inoltre, essi vengono inclusi tra i contaminanti da considerare nei Descrittori
8 e 9 della direttiva quadro sulla Strategia per l’Ambiente Marino (MSFD). Il livello e la distribuzione degli IPA
sono stati investigati nei sedimenti marini e in diversi tessuti di due specie ittiche (Solea solea e Mullus
barbatus) provenienti da un’importante zona di pesca situata nel bacino dell’Adriatico Settentrionale e
Centrale. La presente tesi di dottorato fornisce nuove informazioni dei principali effetti biologici, chimici e
ambientali sul livello di contaminazione da IPA nei tessuti dei pesci, compreso quello edibile. Inoltre, viene
esaminata la relazione tra il livello degli IPA e quello dell’espressione del mRNA di alcuni enzimi antiossidanti,
nonché la perossidazione lipidica. Tale tesi fornisce utili ed innovative informazioni sulla risposta biologica di
pesci selvatici dell’Adriatico, esposti ad inquinamento da IPA. Studi mirati in questa direzione sono essenziali
per determinare lo stato ambientale degli ecosistemi marini e il raggiungimento del buono stato ambientale
(GES), come suggerito dalla MSFD. Pertanto, i risultati di questa tesi sono rilevanti per l’applicazione della
MSFD, e potrebbero essere utilizzati per aumentare e definire il set di dati per lo sviluppo di nuovi indici di
qualità ambientale, nonché per proteggere gli stock ittici dell’Adriatico.This thesis focuses on the 16 polycyclic aromatic hydrocarbons (PAHs), classified as priority pollutants by the
European Union (EU) and the United States Environmental Protection Agency (US EPA) due to their
carcinogenic and mutagenic effects and, included in the Descriptor 8 and 9 of the Marine Strategy Framework
Directive (MSFD). The PAH level and distribution were investigated in different tissues of two fish species
(Solea solea and Mullus barbatus) and in marine sediments of an important fishing ground located in the
Northern and Central Adriatic Sea. The present PhD thesis provides new insight into the main biological,
chemical and environmental effects on the PAH level in fish tissues, including edible tissue. In addition, it
examines the relationship between the PAH levels and mRNA expression level of some antioxidant enzymes,
as well as lipid peroxidation, proving innovative and useful information on the biological responses of wild
Adriatic fish, exposed to PAH pollution. Therefore, pointed studies in this direction are essential to determine
the environmental status of the marine ecosystems and the achievement of the GES, as suggested by MSFD.
Furthermore, the results of the present thesis are relevant for the MSFD application. Particularly, results and
products of this PhD thesis could be used to increase and define the dataset for the development of new
environmental quality indexes, as well as to protect the Adriatic fish stocks
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
Optimal Control of Industrial Assembly Lines
Full text linkThis paper discusses the problem of assembly line control and introduces an optimal control formulation that can be used to improve the performance of the assembly line, in terms of cycle time minimization, resources' utilization, etc. A deterministic formulation of the problem is introduced, based on mixed-integer linear programming. A simple numerical simulation provides a first proof of the proposed concept
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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