1,721,100 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
Generalized atrophic benign epidermolysis bullosa
No full textGeneralized atrophic benign epidermolysis bullosa (GABEB) is a rare autosomal recessive variant of junctional epidermolysis bullosa. A typical feature in these patients is the cicatricial alopecia resembling male pattern baldness: in this paper we describe a case of GABEB with particular attention to this characteristic
Allergic contact dermatitis caused by topical timolol for the treatment of infantile hemangioma: An underestimated adverse event?
No full textAllergic contact dermatitis caused by topical timolol for the treatment of infantile hemangiom
Chilblain lupus with nail involvement: a case report and a brief overview.
No full textChilblain lupus erythematosus is a rare, chronic variant of cutaneous lupus erythematosus that occurs during cold or damp periods on the hands, fingers, or feet. It is often associated with other forms of cutaneous lupus and about 20% of patients develop systemic lupus erythematosus. Various medications have been put forward, including steroids, mycophenolate mofetil, calcium channel blockers, and hydroxychloroquine, but the symptoms do not remit completely
Periocular pigmentation associated with use of travoprost for the treatment of alopecia areata of the eyelashes
No full textProstaglandin analogues are intraocular pressure (IOP)- lowering drugs for use in patients with glaucoma and ocular hypertension. Travoprost (AL-6221) (TravatanTM, Alcon, Ft Worth, TX, USA), a PGF2a analogue, is an isopropyl ester of the more active enantiomer(+) of fluprostenol, a selective FP prostanoid receptor agonist.1 It is structurally similar to other prostaglandin F2a analogues such as latanoprost.
Since the introduction of prostaglandin analogues in 1996, several adverse effects have been reported, includ- ing increased eyelash growth, darkening of the iris and periocular skin colour change.2
Travoprost induces growth of lashes and ancillary hairs around the eyelids. Manifestations include greater thick- ness and length of lashes, additional lash rows, and con- version of vellus to terminal hairs in canthal areas as well as in regions adjacent to lash rows. In conjunction with increased growth, increased pigmentation occurs. Vellus hairs of the lower eyelids also undergo increased growth and pigmentation.
Eyelash hypertrichosis has recently been reported in 75% of patients in clinical trials evaluating efficacy of the PGF2a analogue travoprost in the treatment of ocularhypertension.3 Prostaglandin receptors are present in the dermal papilla and in the outer root sheath of the hair follicle and appear to be involved in the development and regrowth of the hair follicle in mice. Prostaglandin ana- logues are believed to prolong the anagen phase of eyelashes.4 Experimental studies indicate that hair growth stimulation by minoxidil might also be mediated by prostaglandin production.5 Travoprost has therefore been proposed as a possible treatment for alopecia areata involving the eyelashes. We report three cases of periocu- lar skin pigmentation, which developed during treatment with topical travoprost for alopecia areata involving the eyelashes
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