1,721,005 research outputs found
Tolerant SSFLC matrix display addressing with equal selection and data voltages
No full textThis paper describes novel addressing waveforms featuring the widest operation at the lowest possible total voltage for a mechanism based on the dielectric torques existing in the SSFLC cell in addiction to the polarization torques, as found by simulations and experiments with chevron cells. The operation at the lowest voltage end of the Compensated Rome modes has been improved and equal selection and data voltages are here used allowing hf stabilization with reduced power supply. Simple adjustments in the selection waveforms provide operation at least in range of temperature 20 °C to 30 °C for fixed 20 V and 30 [mu]s addressing with a commercial FLC mixture
Ferroelectric LCD low voltage matrix addressing technique
No full textWe developed new addressing modes in which ic drivers powered with low voltages can provide short line addressing times. Time-overlapping selection waveforms and techniques for reducing crosstalk and improving operating range were incorporated. 230 microsecond single-shot writing at room temperature with 8.8 V supply voltage is reported, together with measurements of sticking effects and operating ranges
Dispositivo e sistema di misura di grandezze elettriche impiegante una conversione analogico-digitale
No full text
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
Relative handgrip strength is inversely associated with the presence of type 2 diabetes in overweight elderly women with varying nutritional status
No full textBackground and Aims To describe cross-sectional associations of BMI-adjusted handgrip strength with the presence of diabetes and hypertension in a community setting. Methods and Results Between 2016 and 2018, 601 consecutive elderly active women (70.7 +/- 6.9 years) were enrolled. Nutritional status was evaluated by the Mini Nutritional Assessment (MNA) score. Muscle strength and level of fitness were assessed by standardized physical functional tests and handgrip strength (HGS). The majority of participants were overweight or obese (80% with BMI > 25). Prevalence of diabetes and hypertension was 13 and 60%, respectively. Participants in the lowest quartile of BMI-adjusted HGS (RHGS) had significantly higher prevalence of diabetes and hypertension compared with those in the top quartile (20.7 vs 5.3% and 49.3 vs 39.3%, respectively,p < 0.01 for both), without significant differences in nutritional status. Association with the presence of diabetes was significantly weaker in women with higher vs lower RHGS values (OR 0.77; 0.59-0.86 CI95%;p = 0.002), independent of age, abdominal adiposity, and presence of hypertension. RHGS was positively correlated with most of the physical functional tests performed. Conclusion RHGS is an easy-to-obtain measure of muscular strength, independently associated with the presence of diabetes in overweight active elderly women. Prospective studies are required to assess its predictive value to identify adults at risk of developing diabetes
- …
