1,720,993 research outputs found
Molecular range light confinement of metal-air-metal structure for biosensor applications
No full textWe report on an MIM-type plasmonic resonator with a 4-nm slot. The gap was defined using self-aligned deposition using conventional photolithography. The structure shows great promise for a biosensor, with 12 nm/nm surface sensitivity at least
Inside-out, 120 nm diameter metal slot disk resonator arrays for full access to air slot modes
No full textLarge-area array of 120 nm diameter plasmonic air-gap disk resonators with 30-nm thick air-gap is fabricated using nanoimprinting. An inside-out structure allows full access to the slot mode, and easy excitation of the plasmon mode
Smartwatch Strap Wireless Power Transfer System with Flexible PCB Coil and Shielding Material
No full textIn this paper, we designed and demonstrated a smartwatch strap wireless charging system for the first time. First, we designed a flexible PCB coil, shielding material, and receiver (Rx) circuit in a watchstrap. In the design process, we proposed a model for the flexible PCB coil with a bending radius of 40 mm and shielding materials. We used a flexible PCB coil that has 215 μm thickness with dimensions of 54.5 mm x 16 mm. In addition, ferrite core and sheet are applied on the transmitter (Tx) and Rx coils. We verified the proposed model through a 3D EM simulation and measurement in the frequency and time domains. The proposed flexible PCB coil inductance modeling results showed 7.5% and 3.4% errors when compared to the 3D EM simulation and measurement results, respectively. Furthermore, we demonstrated the smartwatch strap wireless charging system using an LG Watch Urbane. A resonance frequency of 100 kHz with the series-series tuning topology is used in accordance with the Qi specifications. Finally, we achieved 30% dc-dc power transfer efficiency and exposed magnetic field of 270 mG 1 cm away from the system through measurements.
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
Modeling, Simulation and Measurement of On-chip Interconnects with Extremely Thin Si Substrate for Flexible Electronics
No full textIn this paper, on-chip interconnections with an ultra-thin silicon (Si) chip for flexible electronics is modeled and verified through 3D EM simulation and measurement. To achieve flexibility of the chip, we grind a Si substrate to 15 μm. When the Si substrate is extremely thin, the lossy Si substrate effect can be reduced. Moreover, we place a ground plane on the top of the Si substrate to further reduce the Si loss. The interconnection lines are designed with the HFSS 3D EM simulation by changing design variables with 50 ohm matching impedance. In addition, we conduct an equivalent circuit modeling of the interconnection line based on RLGC components. The insertion loss (S21) result of the model is then verified with the simulation and measurement results when we ignore the effect of the Si substrate. Finally, the modeling result showed good correlation with the simulation and measurement. From the experiments, we conclude that the flexible chip can be modeled with the simple interconnection RLGC model when the Si thickness is extremely thin and well designed
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
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