1,721,050 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
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
Hypertrichosis of the eyelashes caused by bimatoprost
No full textThe phenyl-substituted analog of prostaglandin F 2alpha , latanoprost (Xalatan; Pfizer, Inc, New York, NY) is an intraocular pressure (IOP)-lowering drug for use in patients with glaucoma and ocular hypertension. Latanoprost has been shown to stimulate eyelash hypertrichosis and has recently been proposed as a possible treatment for alopecia areata involving the eyelashes. We report a case of hypertrichosis of the eyelashes caused by the prostamide bimatoprost (Lumigan; Allergan, Inc, Irvine, Calif), a new IOP-lowering drug
A therapeutic matrix: virtual reality as a clinical tool for spinal cord injury-induced neuropathic pain
Full text linkNeuropathic pain (NP) is a chronic, debilitating, and resistant form of pain. The onset rate of NP following spinal cord injuries (SCI) is high and may reduce the quality of life more than the sensorimotor loss itself. The long-term ineffectiveness of current treatments in managing symptoms and counteracting maladaptive plasticity highlights the need to find alternative therapeutic approaches. Virtual reality (VR) is possibly the best way to administer the specific illusory or reality-like experience and promote behavioral responses that may be effective in mitigating the effects of long-established NP. This approach aims to promote a more systematic adoption of VR-related techniques in pain research and management procedures, highlighting the encouraging preliminary results in SCI. We suggest that the multisensory modulation of the sense of agency and ownership by residual body signals may produce positive responses in cases of brain-body disconnection. First, we focus on the transversal role embodiment and how multisensory and environmental or artificial stimuli modulate illusory sensations of bodily presence and ownership. Then, we present a brief overview of the use of VR in healthcare and pain management. Finally, we discus research experiences which used VR in patients with SCI to treating NP, including the most recent combinations of VR with further stimulation techniques
Body image and body dissatisfaction in binge eating: a comparison between implicit and explicit measures
No full textBinge Eating Disorder (BED) ischaracterized by recurrent episodes of binge eating accompanied by a sense of lack of control over eating and associated with unpleasant feelings and marked distress (DSM-5, APA, 2013). BED is frequently associated to obesity (de Zwaan, 2001). Binge eating symptoms or behaviors (i.e. the experience of binge eating episodes without fulfilling BED criteria) are more common than the full syndrome (Siqueira ET AL., 2004; Spitzer et al., 1992). Body dissatisfaction and overvaluation of weight and shape are known risk factors for both binge eating and BED (Mitchison et al., 2017). Body dissatisfaction, i.e. the negative evaluation of one’s body, is often measured as the difference between the current and the ideal silhouettes chosen among a series of 9 (Gleaves et al., 2000). Overvaluation of weight and shape is a concept that includes both global negative evaluations of one’s body and the perceptions, cognitions and emotions regarding one’s own weight and figure and their influence on self-esteem and self-worth (e.g. Lewer et al., 2017). Notwithstanding the central role of body dissatisfaction and overvaluation of weight and shape also in binge eating, misperception of body size in BED and binge eating behavior has been widely neglected so far. However, a recent review (Lewer et al., 2017) evidence that a few studies show that individuals with BED rate their body shape rather accurately. The presentation will address these topics presenting also results of a study examining implicit and explicit assessment of body image and body dissatisfaction in a sample of 39 participants (age M= 23,9 ± 3,74) divided in two groups based on binge eatingsymptomatology. Data were obtained throughmultiple measures:a Body Image Task (BIT) assessing implicit body image, an analogic scale assessing explicit body image and body dissatisfaction, actual participants’ anthropometric measures, objectively taken by researchers
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