1,721,880 research outputs found
A new circumscription of "Festuca trichophylla" (Gaudin) K. Richter ("Gramineae")
No full textThe identity and taxonomic disposition of ten taxa that have at one time or another been considered as close relatives of Festuca trichophylla (Ducros ex Gaudin) K. Richter are reviewed. A new concept, the F. trichophylla group, is presented in which are placed four species: F. nevadensis (Hackel) K. Richter, F. rothmaleri (Litard.) Markgr.-Dann., F. trichophylla
and F. paucispicula Fuente García & Sánchez-Mata. F. trichophylla itself includes four separate species recognized by MARKGRAF-DANNENBERG (1980) and a subspecies that she placed under F. rubra L.; we divide it into three subspecies: subsp. trichophylla, subsp. scabrescens (Hackel ex Trabut) Catalán & Stace, comb. nov., and subsp. asperifolia (St.-Yves) Al-Bermani, comb. nov. A brief synonymy and geographical range of the six taxa are given. F. rubra var. gaetula Maire ex St.-Yves is transferred to F. nevadensis as var. gaetula (Maire ex St.-Yves) Al-Bermani & Stace, comb. nov.Se revisan la identidad y la posición taxonómica de diez táxones que, en un tiempo u otro, han sido considerados próximos a Festuca trichophylla (Drucros ex Gaudin) K. Richter. Se propone un nuevo concepto, el del grupo de F. trichophylla, que se compone de cuatro especies: F. nevadensis (Hackel) K. Richter, F. rothmaleri (Litard.) Markgr.-Dann., F. trichophylla y F. paucispicula Fuente García & Sánchez-Mata. La propia F. trichophylla incluye,
en nuestra propuesta, cuatro especies distintas de las reconocidas por MARKGRAF-DANNENBERG (1980) más una subespecie situada por la autora bajo F. rubra L.; nosotros distinguimos, dentro de la especie, tre& Subespecies: subsp. trichophylla, subsp. scabrescens (Hackel ex Trabut) Catalán & Stace, comb. nov., y subsp. asperifolia (St.-Yves) Al-Bermani, comb. nov. Se aporta un breve comentario sobre la sinonimia y la distribución geográfica de los seis
táxones del grupo. F. rubra var. gaetula Maire ex St.-Yves se transfiere a F. nevadensis como var. gaetula (Maire ex St.-Yves) Al-Bermani & Stace, comb. nov
Sobre Festuca rubra L. subsp. juncea (Hackel) K. Richter en la Península Ibérica
No full textThe presence of Festuca rubra L. subsp. juncea (Hackel) K. Richter in the Iberian Peninsu la is confirmed as an orophyte frequent in the Pyrenean range. A detailed and illustrated description, a list of the Iberian localities and a map of the European distribution, based on the studied specimens and localities and on bibliographic references, are also added.Se confirma la presencia de Festuca rubra L. subsp. juncea (Hackel) K. Richter en la Península Ibérica como un orófito frecuente en la Cordillera Pirenaica. Se añade una descripción de tallada e ilustrada del taxon, la lista de las localidades ibéricas y un mapa de la distribución en Europa basado en los especímenes examinados y en referencias bibliográficas
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
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
Festuca nigricans K. RICHTER
No full textFestuca nigricans (HACKEL) K. RICHTER Salzburg: Pinzgau, Hohe Tauern, Untersulzbachtal, Weg von der Aschamalm ins Tal S vom Kesselkopf, hochstaudenreiche Blockhalden, ca. 1950 m, 8839/2, 15.07.200 7, leg./det. PP, Herbarium PP. – Pinzgau, Hohe Tauern, Raurisertal, Kalkbretterkopf, Grat Richtung Gasteinerhöhe, ca. 2300 m, 8844/3, 25.07.200 8, leg./det. PP, Herbarium PP. – Pinzgau, Hohe Tauern, Wildgerlostal, von der 1850er Moräne taleinwärts bis zu den Felsabbrüchen W der Materialseilbahn zur Zittauer Hütte, Grasfluren mit Weidengebüsch, ca. 1850 m, 8838/2, 12.07.200 8, leg. PP, det. HW, Herbarium PP. – Pinzgau, Hohe Tauern, Wildgerlostal, vom Salzboden bis zur 1850er Moräne, hochstaudenreiche Grashänge, ca. 1750 m, 8838/2, 12.07.200 8, leg. PP, det. HW, Herbarium PP. Neu für Salzburg. Die Verbreitung und Systematik der Festuca violacea -Gruppe im Ostalpenraum war lange verworren. Erst durch PILS (1980) wurde Klarheit in diesen Verwandtschaftskreis gebracht. PILS gliederte Festuca violacea im engeren Sinn (exklusive Festuca norica) in die diploide Festuca nitida, die hexaploide Festuca puccinellii (= Festuca nigricans) und die ebenfalls diploide Festuca picturata. Hinsichtlich Verbreitung stellt Festuca nitida die südalpin-dinarische Sippe, Festuca nigricans die westalpine und Festuca picturata die ostalpine Art dar. Nach der bei PILS (1980) dargestellten Verbreitungskarte reicht Festuca nigricans Richtung Osten bis in die Zillertaler Alpen und wird hier – mit einer schmalen Überlappungszone – vom ostalpischen Festuca picturata abgelöst. Die oben angeführten Belege zeigen nun, dass Festuca nigricans seine Verbreitungsgrenze nicht in Tirol, sondern deutlich weiter östlich im Bundesland Salzburg besitzt. Beide Arten weisen also eine relativ breite Überlappungszone auf. Die Schlüsselmerkmale zur Unterscheidung von Festuca picturata und von Festuca nigricans sind bei PILS (1980) akribisch und exakt dargestellt. Im Gelände fällt Festuca nigricans durch seine etwas grösseren Blüten auf, ein Abmessen der oberen Hüllspelze gibt im Regelfall bereits im Freiland eine eindeutige Zuordnungsmöglichkeit zu einer der beiden Sippen (über 4 mm: F. nigricans, unter 4 mm: F. picturata). In Hinkunft sollte vermehrt auf Vorkommen von Festuca nigricans vor allem in westlichen Salzburger Landesteilen geachtet werden. Auch wäre es interessant, ob sich die beiden Sippen – dort wo sie gemeinsam auftreten – standörtlich differenzieren.Published as part of Stöhr, O., Pilsl, P., Essl, F., Wittmann, H. & Hohla, M., 2009, Beiträge zur Flora von Österreich, III, pp. 1677-1755 in Linzer biologische Beiträge 41 (2) on page 1709, DOI: 10.5281/zenodo.527972
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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