1,720,982 research outputs found
Tecniche contrastografiche nello studio dell'esofago del cavallo
No full textLa diagnosi delle patologie esofagee nel cavallo viene formulata sulla base di segni clinici e di esami collaterali, quali endoscopia, indagini radiografiche dirette e con mezzo di contrasto (MdC). Scopo di questa comunicazione è descrivere le tecniche e le metodiche radiologiche per lo studio dell'esofago in condizioni normali e patologiche, sottolineandone possibilità e limiti per un possibile impiego clinico
Development of a technique for continuous perineural blockade of the palmar nerves in the distal equine thoracic limb
No full textObjective: To develop a technique for placing continuous peripheral nerve block (CPNB) catheters adjacent to palmar nerves in horses and to evaluate the effect of low-volume local anesthetic (LA) infusion on nociception in the distal equine thoracic limb. Study design: In vitro and in vivo laboratory investigation. Study material and animals: Forty-two thoracic limbs from 22 equine cadavers and five horses. Methods: Thoracic limb specimens were dissected to find landmarks for catheter insertion adjacent to medial and lateral palmar nerves. Based on the anatomy of the proximal metacarpus, a technique for placing palmar CPNB catheters was developed and the potential for catheter dislodgement studied in vitro by fluoroscopic visualization during passive carpal flexion and dye injection following simulated limb motion. The feasibility of CPNB catheter instrumentation in standing, sedated horses was tested in five animals, with ultrasound control. Electrical and mechanical stimulation thresholds and response latencies for hoof withdrawal responses (HWR) were determined following saline or LA infusion. Results: Medial and lateral CPNB catheters were inserted percutaneously 2 and 4-5 cm, respectively, distal to the accessory carpal bone and advanced for ∼7 and 10 cm, respectively, to place the tip just proximal to the communicating branch of the nerves. Catheters were placed correctly in 88% and 85% of cadaver limbs. In the standing horses, LA infusion not only increased HWR thresholds and latencies to noxious mechanical or electrical stimulation but also caused vasodilation and limb swelling over time. Conclusion: The technique, developed in vitro, for placing and maintaining palmar CPNB catheters in the equine thoracic limb was successfully applied in vivo. Catheters were well tolerated but LA infusion may cause limb swelling, suggesting a need for further exploration of drug and infusion regimens. Clinical relevance: Continuous perineural LA infusion along palmar nerves may develop into an effective analgesic technique in horses suffering from lower limb pain
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
Il faro. Note sui contributi di Gianfranco Dalmasso, Francesco Emmolo e Maurizio Scandella (02/04/2013)
Full text linkUna riflessione a partire dai contributi di G.Dalmasso, E. Emmolo, M. Scandella, apparsi sul corrente numero di «Nóema»
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
A singular case of total traumatic hoof avulsion in a horse: treatment and outcome
No full textTotal traumatic hoof avulsion is a rare condition in horses. Hoof avulsion can be caused by acute injuries or achieved in the surgical treatment (ablation) of high scale laminitis. Decreasing motion at the affected site and hoof stabilization are essential to obtain a successful outcome. Complete avulsion may be treated by daily cleaning and bandaging but if the wound is unstable or large defect is present cast application is recommended. Normally casts are left in place from 2 to 3 weeks and changes are frequently required before wound is completely healed. The aim of this work is to describe a case of total traumatic hoof avulsion complicated by an open fracture of the third phalanx in a horse, the treatment and the present encouraging outcome
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