124,782 research outputs found
Complex Power Distribution Network Investigation Using SPICE Based Extraction from First Principle Formulations
No full textThe modeling and the analysis of the power distribution networks (PDN) within multi-layer printed circuit board is crucial for the investigation of the performance of PCB systems. Carrying out such analyses in SPICE based tools has the advantage of being faster than the corresponding full-wave modeling and it allows obtaining both frequency and time domain results
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Electromagnetic Band Gap Structure for Common Mode Filtering of High Speed Differential Signals
No full text"High Speed differential signals have become common place in the computer industry. While the use of differential signaling can significantly improve the signal integrity, it does not eliminate EMC concerns. Small amounts of rise/fall time mismatch, in-pair skew, or amplitude mismatch can create significant amounts of common mode signals, which, in turn, cause EMI emissions. Discrete common mode filters are not commonly used due to their impact on the intentional signal as well as their cost. Electromagnetic band gap (EBG) structures can filter unwanted common mode energy without reducing the signal integrity of the intentional signal.
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Miniaturization approach for EBG-based common mode filter and interference analysis
No full textThis paper describes the effort to miniaturize common mode filters based on electromagnetic bandgap structures. It describes the proposed approach by means of a systematic analysis of different configurations. The typical 3-patch configuration proposed in the past is modified removing the central patch and the bridge dimensions are tuned for keeping the same target frequency. The analysis of the crosstalk is carried out for the relevant configurations in order to assess the possible implementation of these structures in high density printed circuit boards. The simulation results are discussed and compared to identify the best miniaturized geometry for a practical implementation
Resonant EBG-Based Common Mode Filter for LTCC Substrates
No full textTo develop usable EBG-based common mode fliters miniaturization is required. In this paper is introduced a quarter-wavelength resonant EBG-based common mode filter on LTCC substrate whose dimensions are miniaturized according a systematic stepped procedure. Results in terms of common mode attenuation and differential mode transmission are presented. Consideration is also given to the decreasing of the direct radiation
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