1,721,100 research outputs found
Further improvements of an extended Hakki-Paoli method
No full textA modified Hakki-Paoli method, for measuring optical gain in laser diodes, proposed at the past ESREF 2017 conference is here further improved in terms of practical implementation. In particular, averaging both the spectral function and its reciprocal, over an oscillation cycle is shown to lead to the gain function replacing the calculation of maxima and minima, a cumbersome task for noisy spectra at low injection level. The ultimate goal is to get rid of the many constraints that complicate gain measurements for other than the manufacturers, and to provide a new powerful tool for laser diode characterization and diagnostics
Analysis of counterfeit electronics
Full text linkCounterfeit electronics pose reliability risks and severe harms. The failures of systems that use counterfeits can cause safety and security problems. Lack of caution on the part of buyers, obsolescence, lower prices, costly inspection procedures, absence of origin verification tools is contributing to the widespread of counterfeit electronics. Two case studies are proposed to add a piece of information in this context supporting evidence regarding the capillary penetration of the counterfeit devices. It should contribute to arise some concerns
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
Electronic components authentication via physical analysis
Full text linkCounterfeit electronics is a reliability problem. Undetected counterfeits can lead to increased scrap rates, early field failures, and rework rates, causing a dramatic reduction in the reliability of systems. Identifying counterfeit devices can be challenging because not everything that seems suspect is necessarily fake. On the other hand, counterfeiters keep growing and adapting
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
Short- and medium-term outcomes of laparoscopic sleeve gastrectomy: a single center experience*.
No full textThere are different surgical techniques adopted to treat morbid obesity. The objective of this study is to report surgical results after 20 laparoscopic sleeve gastrectomy (LSG) cases treated for morbid obesity during a 2-year follow-up and verify the effectiveness of LSG in term of Excess Weight Loss (EWL) as compared to laparoscopic adjustable gastric banding (LAGB)
Cyanoacrylate sealant compared to fibrin glue in staple line reinforcement during laparoscopic sleeve gastrectomy. Pilot prospective observational study
Full text linkLaparoscopic Sleeve Gastrectomy (LSG) is associated with serious complications, such as staple line leaks and bleeding. This paper presents a novel approach aimed at the successful consolidation of the suture by the use of the cyanoacrylate, here compared to the use of fibrin glue. Fifty consecutive patients, recruited from October 2015 to March 2016, were submitted to laparoscopic sleeve gastrectomy by standardized surgical technique. The staple line was reinforced with cyanoacrylate or fibrin glue. There were no post-operative complications and no operative time prolongation. An early removal of the draining and a reduction of the average hospitalization were observed. The results suggest that staple line reinforcement with cyanoacrylate during laparoscopic sleeve gastrectomy is as easy, safe and cost-saving as with fibrin glue. Furthermore, cyanocrilate allows a chemical omentoplasty with the result of restoring the anatomy. Therefore, this approach is viable and useful for future trials on the efficacy in preventing surgical post-operative complications
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