1,721,022 research outputs found
Parmotrema reticulatum Choisy 1952
No full textP. reticulatum (Taylor) Choisy (1952: 175) Reported from Argentinian Tierra del Fuego and Falkland Islands / Islas Malvinas by Calvelo & Liberatore (2002). The species is common in central parts of Torres del Paine National Park, more often on rocks than tree trunks. Specimens examined: CHILE. XII REGIÓN DE MAGALLANES: Parque Nacional Torres del Paine, 300 m E of Camping Pehoe, 51 ° 07’S, 73 ° 00’W, 80 m, on Nothofagus sp., 12 Mar 1998, Bjerke, J. W . 159/98 (TROM); 0.5 km NW of Guardería Laguna Amarga. 50 ° 59’S, 72 ° 47’W, 80 m, on cortex of Nothofagus antarctica in a SW facing slope near the river, 27 Nov 1996, Elvebakk, A . 96:521 (TROM); 500 m N of the western lake of Lagunas Mellizas, 51 ° 03’30”S, 72 ° 59’W, 100 m, very large specimens on rock surfaces in an open forest in a S-facing slope, 3 Dec 2000, Elvebakk, A . 00:900 (TROM); 00:904 (TROM); Pudeto, 300 m W of the northernmost inlet, 51 ° 04’S, 73 ° 01’W, 100 m, on a S-facing rock surface in Mulinum spinosum shrubland, 11 Dec 1999, Elvebakk, A . 99:1303 (TROM); Camping Pehoe, E side of Lago Pehoe, 51 ° 07’S, 73 ° 01’W, 70 m, on trunks of Nothofagus antarctica, 10 Mar 1998, Elvebakk, A . 98:459 & Bjerke, J. W. (TROM).Published as part of Elvebakk, A., Bjerke, J. W. & Støvern, L. E., 2014, Parmelioid lichens (Parmeliaceae) in southernmost South America, pp. 1-30 in Phytotaxa 173 (1) on page 11, DOI: 10.11646/phytotaxa.173.1.1, http://zenodo.org/record/514271
Hypotrachyna swinscowii Krog & Swinscow 1987
No full textH. swinscowii (Hale) Krog & Swinscow (1987: 420) Mapped from a couple of localities in Magallanes by Adler & Calvelo (2002). The specimen reported below contains atranorin, salazinic and lobaric acids (analyzed and annotated on specimen by M.E. Hale Jr.). Specimen examined: CHILE. XII REGIÓN DE MAGALLANES: Parque Nacional Torres del Paine, Lago del Toro (L. Maravilla), Estancia Río Paine, on stony ground in an open Nothofagus antarctica forest, 16 Mar 1941, Santesson, R . 6478 (S).Published as part of Elvebakk, A., Bjerke, J. W. & Støvern, L. E., 2014, Parmelioid lichens (Parmeliaceae) in southernmost South America, pp. 1-30 in Phytotaxa 173 (1) on page 9, DOI: 10.11646/phytotaxa.173.1.1, http://zenodo.org/record/514271
Hypotrachyna brevirhiza Hale 1975
No full textHypotrachyna brevirhiza (Kurok.) Hale (1975: 26) This species was described with its type (S) from Mina Elena at Isla Riesco, Magallanes (Hale & Kurokawa 1968). The species was described as common in southernmost South America, a conclusion confirmed by our studies. All studied specimens contain atranorin and salazinic acids (majors), and norstictic acid (minor). Specimens examined: ARGENTINA. PROVINCIA DE TIERRA DEL FUEGO: Río Irigoyen, Stenroos, S . 2715 (H; immixed with, and filed below Menegazzia magellanica). CHILE. XII REGIÓN DE MAGALLANES: Parque Nacional Torres del Paine, 2 km N of Salto Grande, 51 ° 04’S, 73 ° 01’W, 80 m, on S-facing rocks and on bases of Berberis microphylla, 7 Dec 2000, Elvebakk, A . 00:921 (TROM); Lago Pehoe NW, 500 m SE of Refugio y Camping Pehoe, 51 ° 04’30”S, 73 ° 07’W, 80 m, on a log in a river gorge, 6 Jan 1998, Elvebakk, A . 98:060 (TROM); Lago Pehoe E, at Camping Pehoe, 51 ° 07’S, 73 ° 01’W, on Nothofagus antarctica, Mar 1998, Elvebakk, A . 98:343 & Bjerke, J. W. (TROM); Puerto Natales, Cerro Dorotea, on sandstone rocks, 9 May 1940, Santesson, R . 8246a (S), Seno Skyring, N part, 3 km W of Puerto Altamirano, 52 ° 35’S, 72 ° 06’W, 30 m, on a fallen log of Nothofagus antarctica, 30 Nov 1999, Elvebakk, A . 99:979 (TROM); Península Brunswick, Punta Arenas W, Río de las Minas, 100 m, on Nothofagus pumilio, 12 Mar 1992, Elvebakk, A . 92:003; 21 Mar 1992, Elvebakk, A . 92:082 (TROM).Published as part of Elvebakk, A., Bjerke, J. W. & Støvern, L. E., 2014, Parmelioid lichens (Parmeliaceae) in southernmost South America, pp. 1-30 in Phytotaxa 173 (1) on page 7, DOI: 10.11646/phytotaxa.173.1.1, http://zenodo.org/record/514271
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
Hypotrachyna densirhizinata Hale 1975
No full textH. densirhizinata (Kurok.) Hale (1975: 31) One large colony was discovered on a north-facing rock wall in Torres del Paine National Park. The specimens contain atranorin, α-alectoronic acid and cf. α-collatolic acid. In the study area it has previously only been reported from Puerto Yartou in Chilean Tierra del Fuego (Hale & Kurokawa 1968). Specimen examined: CHILE. XII REGIÓN DE MAGALLANES: Parque Nacional Torres del Paine, between Lago Grey and Lago Pehoe, 200 m S of ‘elevation 269’, 51 ° 06’S, 73 ° 09’W, 150 m, on a vertical, north-facing cliff wall, ass. with Parmotrema reticulata and Normandina pulchella, 11 Mar 1998, Elvebakk, A. 98:472 & Bjerke, J.W. (TROM, SGO).Published as part of Elvebakk, A., Bjerke, J. W. & Støvern, L. E., 2014, Parmelioid lichens (Parmeliaceae) in southernmost South America, pp. 1-30 in Phytotaxa 173 (1) on page 8, DOI: 10.11646/phytotaxa.173.1.1, http://zenodo.org/record/514271
Xanthoparmelia conspersa Hale 1974
No full text<i>Xanthoparmelia conspersa</i> (Ach.) Hale (1974: 485) <p> <i>Xanthoparmelia conspersa</i> was listed from the Falkland Islands by Calvelo & Liberatore (2002) and Adler & Calvelo (2007), both referring to Nash <i>et al.</i> (1995). However, Nash <i>et al.</i> (1995) did not accept it from southern parts of South America, where instead other isidiate species occur.</p>Published as part of <i>Elvebakk, A., Bjerke, J. W. & Støvern, L. E., 2014, Parmelioid lichens (Parmeliaceae) in southernmost South America, pp. 1-30 in Phytotaxa 173 (1)</i> on page 23, DOI: 10.11646/phytotaxa.173.1.1, <a href="http://zenodo.org/record/5142714">http://zenodo.org/record/5142714</a>
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
- …
