105,387 research outputs found
Triphora rietensis W. H. Turton 1932
No full textTriphora rietensis W.H. Turton, 1932 Triphora rietensis W.H. Turton, 1932: 116, pl. 25, fig. 848. Type locality. South Africa, Port Alfred. Type material. Type material not located so far. Distribution. South Africa (Turton 1932).Published as part of Bakker, Piet A. J. & Albano, Paolo G., 2022, Nomenclator, geographic and stratigraphic distribution of the family Triphoridae (Mollusca: Gastropoda), pp. 1-216 in Zootaxa 5088 (1) on page 151, DOI: 10.11646/zootaxa.5088.1.1, http://zenodo.org/record/583653
Triphora albanyana W. H. Turton 1932
No full textTriphora albanyana W.H. Turton, 1932 Triphora albanyana W.H. Turton, 1932: 118, pl. 25, fig. 864. Type locality. South Africa, Port Alfred. Type material. In OUMNH. Distribution. South Africa (Turton 1932).Published as part of Bakker, Piet A. J. & Albano, Paolo G., 2022, Nomenclator, geographic and stratigraphic distribution of the family Triphoridae (Mollusca: Gastropoda), pp. 1-216 in Zootaxa 5088 (1) on page 20, DOI: 10.11646/zootaxa.5088.1.1, http://zenodo.org/record/583653
Triphora rufanensis W. H. Turton 1932
No full textTriphora rufanensis W.H. Turton, 1932 Triphora rufanensis W.H. Turton, 1932: 118, pl. 25, fig. 862. Type locality. South Africa, Port Alfred. Type material. OUMNH type material is lost. Distribution. South Africa (Turton 1932; Albano et al. 2019). Remarks. Additional specimens are present in the NHMUK (1933.9.4.22–1933.9.4.23), but there is no evidence for their type status so far (Albano et al. 2019).Published as part of Bakker, Piet A. J. & Albano, Paolo G., 2022, Nomenclator, geographic and stratigraphic distribution of the family Triphoridae (Mollusca: Gastropoda), pp. 1-216 in Zootaxa 5088 (1) on page 153, DOI: 10.11646/zootaxa.5088.1.1, http://zenodo.org/record/583653
Ecological effects of strong winds on forests
No full text[Extract] Natural and anthropogenic disturbances shape forest ecosystems by controlling their structure, species composition and functional processes (Dale et al., 2001). Forest ecosystem dynamics are largely dependent on natural disturbances (like strong winds), that reshape ecosystem structure and composition, modulate ecosystem functioning, and reset and accelerate succession (Franklin et al., 2002; Turton and Stork, 2008; Turner, 201 O; Thom et al., 2013). Strong winds - typically those above gale force or 61 km h⁻¹ - are among the most important exogenic disturbance agents affecting forest ecosystems across the world, at a range of scales (Proctor et al., 2001; Zhao et al., 2006; Lugo, 2008; Turton, 2008; Wang and Xu, 2009; Yoshida et al., 2011; Turton, 2012).
Tropical cyclones - also known as hurricanes and typhoons - affect wet and dry tropical forest regions adjacent to eight tropical ocean basins around the world: 1) northwest Pacific; 2) north Indian; 3) southwest Indian; 4) southeast Indian; 5) southwest Pacific; 6) northeast Pacific; 7) north Atlantic/Caribbean; and 8) south Atlantic (Turton, 2013). Forests between about 5-7 degrees north and south of the equator do not experience tropical cyclones due to the weak Coriolis effect near the equator. Nonetheless, there are many anecdotal reports of severe damage to forests over several square kilometres outside the typhoon belt in Southeast Asia (e.g. Whitmore and Burslem, 1998), and there is evidence that these events are common enough to have an influence on the structure of many of the forests in the region (e.g. Proctor et al., 2001; Baker et al., 2005)
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
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
Cyclotron production of short-lived radionuclides and labelled compounds for use in biomedical research and clinical diagnosis
No full textThe works submitted in this thesis cover the development of methods for the production in a cyclotron of a variety of radionuclides and their incorporation in radio-labelled compounds for use in biomedical research. In addition, papers are included which describe biomedical applications of such radio-tracers. My co-authorship of these publications reflects my interest in the design and execution of experiments in the realm of interdisciplinary research. The original contributions to science embodied in the publications submitted include examples of novel radiochemistry applied in the areas of cyclotron production of short half-life radionuclides and their radiochemical purification. In many cases the use of these radionuclides in biomedical research has added new information to the body of medical scientific Toiowledge. Novel radiolabelling strategies using very short half-life radionuclides are included. These have necessitated the development of rapid radio-organic syntheses, several of which have been achieved using automated microchemical engineering process plants of my design. I have also developed novel systems for the administration of radionuclies and radio-labelled compounds of pharmaceutical quality, widely acknowledged to be "World Firsts." My invention of the (^81)Kr(^m) radionuclide generator resulted in publications covering a wide range of medical applications. These are included with the thesis. The device is now produced in many countries around the world for use both in routine clinical diagnosis and in research, particularly in lung disease. More recently, I have created an automated bedside infuser of H(_2)(^15)O, which has revolutionised measurements of regional cerebral blood flow using the technique of Positron Emission Tomography for in vivo regional mapping of brain activity
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
The construction of Karen Karnak: The multi-author-function
No full textThis thesis is situated within the comparatively recent developments of Web 2.0 and the emergence of interactive WikiMedia, and explores the mode of authorship within a Read/Write culture compared to that of a Read/Only tradition. The hypothesis of this study is that the role of the audience has become merged with the author, and as such, represents new functions and attributes, distinct from a more conventional concept of authorship, in which the roles of audience and author are more separate. Read/Write and participatory culture, as defined by this study, is focused on collaboration, and includes the influences of D.I.Y. culture, Open-Source practices and the production of text by multiple authors. Multi-authorship presents a re-thinking of several concepts which support the notion of the individual author, since the focus of multi-authorship is not on attribution and ownership of a finished text, but on the continued malleability of a text. Modes of multi-authorship, demonstrated in the use of the pseudonyms Alan Smithee and Karen Eliot, represent declarative authors whose names signify multiple origins, whilst concurrently indicating a distinct body of work. The function of these names form an important context to this study, since primary research involves the construction of an experimental mode of multi-authorship utilising WikiMedia technology and the interaction of thirty nine participants, who are invited to create a body of work under the collective pseudonym Karen Karnak. The data generated by this experiment is analysed using aspects of Michel Foucault's author-function to identify and determine power structures inherent in the WikiMedia context. The interplay of power structures, including concepts such as identity, ownership and the body of work, affect the resulting mode of authorship and contribute to the construction of Karen Karnak, suggesting further areas of research into the emerging multi-author
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