1,720,962 research outputs found
Capacitive coupled RFID tag using a new dielectric droplet encapsulation approach
Get PDFRadio frequency identification (RFID) is a well-known and fast-growing technology
used to identify people, animals and products. RFID tags are used to replace bar
codes in a wide range of applications, to mention just a few, retail, transportation,
logistics and healthcare.
The two main driving aspects for most of research and development projects
concerning RFID tags are the reduction of assembly costs and the downsizing of
microchips. In that respect and considering an Industry 4.0 scenario, the study of a
new assembly approach for passive and high frequency RFID tags has been proposed
and studied in this thesis.
In this new approach, which is based on the inkjet printing technology, a specifically
designed radio frequency integrated circuit (RFIC) will be delivered, inside a
liquid dielectric droplet, onto the antenna and no longer placed and oriented precisely
as it happens nowadays with pick-and-place and flip chip machines. After a landing
phase, the liquid droplet (with the encapsulated chip) will self-aligns with respect
to the contact thanks to capillary forces driven by specifically designed wetting
conditions on the substrate of the antenna. Finally, with few additional steps, the
complete RFID tag is created.
This research project brings to light a considerable simplification and a very high
potential of parallelization, compatible with large volume manufacturing methods, in
comparison to nowadays existing technologies. This may substantially drive down
the fabrication costs. An in-depth analysis of electrical performances have been
carefully undertaken and compliance with the ISO/IEC 144443 standard has been
verified. Mathematical models have been developed showing fundamental limits for
the maximum tag reading range and power requirements of the RFID reader
Surface tension-driven self-alignment of double-surface radio-frequency integrated circuits for a low cost and high throughput assembly process of passive RFID tags
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
- …
