1,720,986 research outputs found
Application of LE-FDTD method to HF circuit analysis1996 International Conference on Simulation of Semiconductor Processes and Devices. SISPAD '96 (IEEE Cat. No.96TH8095)
No full textA circuit simulation technique is discussed, which accounts for the "full-wave" analysis of signal propagation along the interconnections of an arbitrary circuit, including active, non-linear devices. A number of electromagnetic propagation effects have significant influence over high-frequency (either analog or digital) circuit performances and can be accurately modeled by means of the approach described: among them, interconnection behavior, cross-talk phenomena, package interactions. Conventional circuit CAD tools allow the analysis of such effects by resorting to equivalent-circuit, lumped-element descriptions of interconnecting lines. Although this technique is highly computationally efficient, the definition of the equivalent circuit topology and the estimation of its parameters often relies on rather drastic approximations, because of the inherently "distributed" nature of most propagation effects. To tackle this problem, the Lumped-Element, Finite-Difference Time-Domain (LE-FDTD) technique has been conceived. Within this approach, SPICE-like compact device models are coupled to the numerical solutions of Maxwell's equation over distributed domains. The extension of LE-FDTD technique to circuits including GaAs MESFET devices is reported, and a few simulation examples are illustrated
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Characterization of water soluble dendrimer formulations of an insoluble thiocarbamate derivative with moderate anti HIV-1 activity: an overview
No full textDrug delivery is an engineered technology focused on the development of Drug Delivery Systems (DDSs) able to transport, release and maintain for long time the useful load of therapeutics in the body as needed for safe playing out the desired therapeutic effects. Nanosized dendritic polycationic polymers such as commercially available PAMAMs, are the most exploited materials for preparing smart DDSs, but unfortunately, the excessive cationic feature of the inner framework results in a high level of cytotoxicity. Nowadays, not charged amino acid-modified dendrimer scaffolds are considered as better solutions. These dendrimers have a more controlled number of nitrogen atoms and can be protonated at physiological pH. In order to improve the water solubility of the thiocarbamate non-nucleoside HIV-1 reverse transcriptase inhibitor 1 (Figure 1)1 five prodrugs were prepared by its entrapment inside not PAMAM amino acids-modified core-shell hydrophilic2 (Figure 2) and amphiphilic3 (Figure 3) dendrimers. As detailed in this communication an overview, organized in tables, graphs and NMR spectra of the physicochemical properties which identified obtained dendriplexes (DPXs) was provided. As estimated by NMR analysis, DPXs showed good load capacity. Mean size of their particles is suitable for avoiding rapid renal clearance while the release profile of the drug is favourable to a low spreading of drug in blood and to a massive release only within the cell. DPXs are soluble in water, EtOH and MeOH, have proper but not excessive cationic character and an optimal buffer capacity for enhanced cellular up take and pH-responsive endosomal escape once inside the cell. References: [1] A. Spallarossa, A. Ranise, et al., Eur. J. Med. Chem. 2009, 44, 1650-1663. [2] S. Alfei, S. Catena, 2018, submitted to Polym. Advan. Technol. 2018: https://doi.org/10.1002/pat.4396. [3] S. Alfei, S. Catena, 2018, submitted to Polym. Int. 2018, https://doi.org: 10.1002/pi.5680
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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