1,720,960 research outputs found
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
The Influence of Light Exposure on Electrohydrodynamic (EHD) Printing of CdS/CdSe Quantum Dots
No full textThesis (Master's)--University of Washington, 2025Electrohydrodynamic (EHD) printing is a high-resolution deposition technique widely used for patterning functional nanomaterials. The printability of inks in EHD printing is highly dependent on factors such as polarizability, dielectric constant, and surface tension, which determine the formation and stability of the Taylor cone. While EHD printing is typically controlled through electric field modulation, external stimuli such as light exposure could provide an additional tuning parameter, yet its influence remains largely unexplored.This study investigates whether 395 nm light enhances the EHD printability of CdSe/CdS quantum dots (QDs) by affecting the material's response under a fixed voltage. Experimental results show that, under identical voltage conditions, printing is significantly enhanced with 395 nm illumination, whereas minimal deposition occurs in the absence of light. This finding suggests that optical excitation may influence charge dynamics or dipole formation within the ink, potentially altering its response to the applied electric field.
By demonstrating a clear correlation between light exposure and enhanced EHD printing, this work provides a foundation for further exploration of optically controlled material deposition. Understanding this effect could lead to new strategies for precision printing of optoelectronic materials, enabling tunable and high-resolution patterning techniques
Characterization of Interconnects for Perovskite Solar Modules
Get PDFThesis (Master's)--University of Washington, 2023Electrical characterization of interconnects for solar modules allows for accurate resistive loss assessment. Specifically, for thin-film perovskite solar modules, it is crucial to assess the resistive losses such as contact resistance and contact resistivity where the top and bottom electrodes meet. To overcome the difficulties in commercializing perovskite thin-film devices, it is pivotal to improve upon device fabrication and characterization procedures. Using a four-point probe system, multiple aspects of electrical characterization can be carried out with simple test structures resembling solar modules. Previously, this probe system has been used to characterize sheet resistance of semiconductors and resistance of the metal contacts, but less often has been used in the field of thin-film photovoltaics. Critically, the P2 interconnection where the cells in a module are serially connected has the potential to be further optimized to lessen resistive losses. In this work, specially constructed test structures resembling perovskite thin-film solar modules with P2 interconnects are electrically characterized utilizing a four-probe system and a transition line method
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
Advancing Additive Nanomanufacturing of Quantum Optoelectronics
No full textThesis (Ph.D.)--University of Washington, 2025The fabrication of quantum optoelectronic devices faces significant challenges due to the limitations of conventional nanomanufacturing techniques, which hinder the precise integration of quantum materials with nanophotonic structures. This dissertation investigates electrohydrodynamic inkjet (EHDIJ) printing as a transformative nanomanufacturing approach that enables additive, high-resolution patterning at the nanoscale. First, EHDIJ printing is used to heterointegrate colloidal emitters onto suspended nanophotonic cavities, enhancing device performance while preserving structural integrity. Next, the technique is refined to achieve deterministic placement of single quantum dots, enabling integration into complex photonic architectures. Finally, EHDIJ printing is applied as a femtoscale reactor for synthesizing single perovskite nanocrystals with spatial and structural precision. These contributions establish EHDIJ printing as a versatile platform that unifies synthesis and integration, offering a scalable path toward sustainable manufacturing of quantum optoelectronic devices. This work opens new possibilities for quantum photonic circuits, on-chip single-photon sources, and hybrid device architectures previously limited by fabrication constraints
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
Towards Completely Printed High-Capacity Flexible Zinc-Air Batteries
No full textThesis (Ph.D.)--University of Washington, 2021Flexible thin batteries are an essential component of emerging thin, flexible and wearable electronics. In this work a completely printed thin film zinc-air battery has been demonstrated for the first time via a layer-by-layer monolithic additive process without electrolyte filling after cell fabrication. This monolithic process was enabled by the high thermal stability and low vapor pressure of the sold ionic liquid electrolyte films. These printed thin film batteries exhibited high volumetric capacities of 200 AhL-1 as compared to commercially-available thin film lithium polymer batteries and represents, as far as the authors are aware, the highest areal capacity (2.0mAh cm-2) for any cells with thicknesses below 160 µm.1 For batteries below 500 µm in total thickness, an aerial capacity of 2.4mAh cm-2 is higher than that of other flexible batteries.2,3 The ionic liquid gel-based electrolyte is stable throughout the fabrication process which includes, cumulatively, 90 minutes of heat treatment at 80 Co. Our new DES electrolyte and anode fabrication technique allow us to further reduce the overall thickness and make our battery electrolyte biodegradable. The screen printing and stencil printing tools employed for open-air processing in this study are widely available and scalable to high production throughputs. This additive printing approach could readily be translated to large scale, low cost, and low carbon footprint production of truly thin film batteries to power next generation, low toxicity, sustainable medical devices, wearable electronics and IoT devices
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