1,721,729 research outputs found
CIL:12591
No full textMicrograph of a semi-thick (1-2 µm) section of an infected maize leaf, with silver-enhanced immunogold labeling, that shows dark staining of corn stunt spiroplasma (CSS, Spiroplasma kunkelii, Class Mollicutes) aggregates in phloem tissue. The section was counter stained with toluidine blue. CIL:19129, from the same image group, is a labeled version of this. CSS is a wall-less procaryote that causes corn stunt disease and is biologically transmitted by some leafhopper species, e.g. Dalbulus maidis and D. gelbus (Hemiptera, Cicadellidae). Spiroplasma cells are limited by a unit membrane with no cell wall. They can be quasi-spherical, pleiomorphic or maintain a filamentous/spiral form. CSS multiplies in both plant and insect hosts and is transmitted with salivary secretions during feeding of the vector on new host plants. dditional related images from this contributor are available in the Library
Comparison of the standard PN-EN 12591:2009 "Bitumen and bituminous binders - Specifications for paving grade bitumens" to the withdrawn standard PN-EN 12591:2004
No full textOd maja 2009 r. w zbiorze Polskich Norm jest norma PN-EN 12591:2009, która od 18 grudnia 2009 r. jest normą zharmonizowaną. Zrezygnowano w niej z wymagania wobec zawartości parafiny w asfaltach drogowych. Norma oprócz podziału na gatunki asfaltów drogowych opisuje wymagania i metody badań, ocenę zgodności oraz Zakładową Kontrolę Produkcji (ZKP). W artykule omówiono także krajowy dokument aplikacyjny do normy PN-EN 12591.Since May 2009 the standard PN-EN 12591:2009 is in the set of Polish Standards. The Standard was harmonized in EU on 18th December 2009. In an article authors described the requirements for paving grade bitumens according to the new Standard and differences between new and old one. The new standard apart from division of the paving grade bitumens, contains an evaluation of conformity and Factory Production Control (FPC). In the article also Polish national application document has been presented and discussed
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Religious Variability in the Relationship Between Masculinity and Father Involvement
Get PDFThis is the peer reviewed version of the following article: Shafer, K., Petts, R.J. and Renick, A.J. (2019), Religious Variability in the Relationship Between Masculinity and Father Involvement. Journal for the Scientific Study of Religion, 58: 378-397. https://doi.org/10.1111/jssr.12591, which has been published in final form at https://doi.org/10.1111/jssr.12591. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.While traditional masculinity and fathering behaviors are seemingly associated, few studies have considered the conditions under which masculine norms may influence fathers’ behavior. Religiosity is an important factor to consider, given its association with both the endorsement of traditional gender attitudes and father involvement. This paper addresses the independent effects of traditional masculine norms and religiosity on fathering behaviors and considers whether religiosity moderates the relationship between masculinity and men's parenting behaviors. Using a national sample of fathers with children aged 2–17 in the United States, the results suggest that masculinity is negatively associated with father involvement, while religiosity is positively associated with father involvement. Yet, both highly masculine and highly religious fathers are more likely to engage in harsh discipline. Moreover, results suggest that religiosity attenuates the negative relationship between masculinity and active father involvement, while exacerbating the positive relationship between masculinity and harsh punishment
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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