1,354,311 research outputs found
Comparative study for assessing vulnerability to pollution in El Asnam plain, North of Algeria
No full textAssessment of groundwater contamination is an efficient means to discover and carry out the demarcation of the more vulnerable zones to pollution from human activities. This study is focused on the plain of El Asnam (Northern Algeria) characterized by intensive agricultural activities. To protect the groundwater from pollution, it is necessary to determine vulnerable areas. This paper aims to generate groundwater vulnerability map using two models: DRASTIC and Susceptibility Index (SI) associated with the geographic information system (GIS) of El Asnam plain aquifer. The validation of these models to pollution was performed by comparing the nitrate distribution across the area with the classes of vulnerability and has proved that the SI model is the more valid one with 50% of the study area. Considering these results, the SI model may serve as an effective means to help the protection of groundwater and can eventually be used by decision makers and groundwater managers
FIG. 16 in Le cycle biologique d'Acanthocyclops robustus (G. O. Sars, 1863) (Crustacea, Copepoda, Cyclopidae) de Tunisie
No full textFIG. 16. — Morphologie générale des stades adultes d'Acanthocyclops robustus (G. O. Sars, 1863), vue dorsale; A,; B,. Échelles: 100 µm.Published as part of Turki, Souâd, Defaye, Danielle, Rezig, Mohamed & Abed, Amor El, 2002, Le cycle biologique d'Acanthocyclops robustus (G. O. Sars, 1863) (Crustacea, Copepoda, Cyclopidae) de Tunisie, pp. 735-770 in Zoosystema 24 (4) on page 754, DOI: 10.5281/zenodo.468946
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
FIG. 17 in Le cycle biologique d'Acanthocyclops robustus (G. O. Sars, 1863) (Crustacea, Copepoda, Cyclopidae) de Tunisie
No full textFIG. 17. — Urosomites et furca d'Acanthocyclops robustus (G. O. Sars, 1863); A, copépodite 5, vue dorsale; B, stade adulte, vue dorsale; C, stade adulte, vue ventrale. Échelle: 100 µm.Published as part of Turki, Souâd, Defaye, Danielle, Rezig, Mohamed & Abed, Amor El, 2002, Le cycle biologique d'Acanthocyclops robustus (G. O. Sars, 1863) (Crustacea, Copepoda, Cyclopidae) de Tunisie, pp. 735-770 in Zoosystema 24 (4) on page 756, DOI: 10.5281/zenodo.468946
Ultrasound diagnosis of anterior iliopsoas impingement in total hip replacement.
No full textIliopsoas impingement syndrome, an infrequent complication of total hip replacement, has been rarely reported in the radiological literature. It follows chronic friction of the posterior aspect of the iliopsoas muscle and tendon against the acetabular cup, a piece of cement, or cup fixation screws. Clinical findings are non-specific and an imaging modality is required to diagnose the condition. Computed tomography (CT) is considered the gold standard imaging modality in evaluating iliopsoas impingement. We report a case of a patient in which the diagnosis was made by ultrasound and later confirmed by CT
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Chemical characteristics and compositions of red pepper seed oils extracted by different methods
No full textThe present work was undertaken to study the physicochemical characteristics, fatty acid, phenolic and tocopherol compositions as well as the antioxidant activities of red pepper seed oils extracted using different methods (soxhlet, cold-pressing, supercritical-CO2 and microwave-assisted extraction process). The results showed that the red pepper seeds were (on a dry-weight basis): ash 3.05%, water 6.63%, oil 18.39%, protein 28.33%, and total carbohydrate 43.60%. In addition, the results revealed that the predominant fatty acids were linoleic, palmitic and oleic acids. The highest and lowest contents of linoleic acid (76.54%) were found in microwave-assisted (76.54%) and soxhlet (73.65%) extracted pepper seed oils, respectively. < Gamma>-tocopherol was the main tocopherol at 278.65 mg/100 g seed oil, followed by < alpha>-tocopherol and < delta>-tocopherol. Nevertheless, high content in total tocopherols was found in microwave extracted red pepper seed oils. The lowest and highest values of oxidative stability were 1.25 and 11.26 h for soxhlet and microwave-assisted extracted seed oils, respectively. Overall, the high antioxidant activities of microwave-assisted extracted seed oil suggest that it could be economically used as valuable natural products for industrial, cosmetic, and pharmaceutical utilizations
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
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