1,721,141 research outputs found
Development of a-3-D graphics rendering engine with lighting acceleration for handheld multimedia systems
No full textA low-power three-dimensional (3-D) graphics rendering engine with lighting acceleration is designed and implemented for handheld multimedia terminals. The lighting unit is hardware implemented and integrated into the chip for the low-power acceleration of the 3D graphics applications. We adopt the following three steps to handle the memory bandwidth problem for rendering operations. I) We find bilinear MIPMAP is the best texture filtering algorithm for handheld systems based on our developed energy-efficiency metric. With this observation, we adopt bilinear MIPMAP for our texture filtering unit, which requires only 50% of texture memory bandwidth compared with trilinear MIPMAP filtering. II) We put the depth test operation into the earlier stage of the graphics pipeline, which eliminates texture memory accesses for invisible pixels, III) We develop a power-efficient small cache system as the interface to rendering memory. The accelerator takes 181K gates and the performance reaches 20Mpixels/s. A test chip is implemented with 1-poly 6-metal 0,18um CMOS technology. It operates at the frequency of 20MHz with 14.7mW power consumption
Influences of organic loading disturbances on the performance of anaerobic filter process to treat purified terephthalic acid wastewater
No full textA lab-scale anaerobic filter process was operated for the treatment of purified terephthalic acid (PTA) wastewater, and the influences of organic loading disturbances on the process performance were investigated. After about 15 month operation, the COD removal efficiency was maintained at 79% under the volumetric loading rate of 5.05 kg-COD/m(3)/d and the hydraulic retention time (HRT) of 50 h. Interestingly, this performance Could be further enhanced over 85% by applying a step-increase/decrease of the HRT, which was mainly due to the increased p-toluate degradation. In the shock loading tests of four major pollutants (benzoate, acetate, terephthalate and p-toluate), it was found that the overall process performance was adversely affected by all the shock loadings, indicating that the syntrophic microbial consortium involved in the PTA wastewater treatment is highly sensitive to the organic loading disturbances. The complex inhibition effects of the benzoate and acetate on the terephthalate and p-toluate degradations were mainly responsible for this sensitivity. (c) 2008 Elsevier Ltd. All rights reservedX1139sciescopu
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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