196,097 research outputs found
Electrons and phonons in the ternary alloy CaAl2-xSix as a function of composition
No full textWe report a detailed first-principles study of the structural, electronic, and vibrational properties of the superconducting C32 phase of the ternary alloy CaAl2?xSix, both in the experimental range 0.6x1.2, for which the alloy has been synthesized, and in the theoretical limits of high aluminum and high silicon concen- tration. Our results indicate that, in the experimental range, the dependence of the electronic bands on com- position is well described by a rigid-band model, which breaks down outside this range. Such a breakdown, in the theoretical limit of high aluminum concentration, is connected to the appearance of vibrational instabili- ties and results in important differences between CaAl2 and MgB2. Unlike MgB2, the interlayer band and the out-of-plane phonons play a major role on the stability and superconductivity of CaAlSi and related C32 intermetallic compounds
Predictor Design for Altitude Control of a Seaweed Harvester
No full textIn this paper, the predictor design, for altitude control of a seaweed harvester, is
investigated. The harvesting system consists of a vessel and a suspended harvester device, the
altitude of which is controlled by a winch. The control approach of Gallieri and Ringwood
(2010), including a feedforward action, which requires a single step disturbance prediction, is
investigated further, focusing on the disturbance prediction, for noisy sensors. The prediction is
performed using AR and ARMA models, identified online, by using the Recursive Least Squared
with Forgetting Factor (RLSFF) algorithm and the Kalman Filter (KF). The dependance
between the error spectrum and the quality of the control is shown, and the prediction performances
are evaluated, using an FFT-based criterion, oriented to the feedforward application.
The control performances are then evaluated, and the results are compared to Gallieri and
Ringwood (2010)
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
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
Implementation of techniques for computing optical properties in 0-3 dimensions, including a real-space cutoff, in ABINIT
No full textWe have implemented the calculation of optical matrix elements with and without the inclusion of a real-space cutoff in the open-source software package ABINIT. We have also included the possibility to add the contribution arising from the non-local term of the pseudopotential operator. The implementation has been tested successfully for atoms, bulk silicon, and an oxidized silicon surface. (C) 2010 Elsevier B.V. All rights reserved
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
In Vitro H202 stress and patterns of mitochondrial damage in the NCTC 2544 Continuous cell line- a morphological and morphometric study.
No full textThe influence of UV light on the cytocompatibility of polyurethane foams for tissue engineering
No full textLive prey enrichment, with particular emphasis on HUFAs, as limiting factor in False percula clownfish (Amphiprion ocellaris, Pomacentridae) larval development and metamorphosis: molecular and biochemical implications.
No full textIn fast growing organisms, like fish larvae, fatty acids provided through live prey are essential to satisfy high
energy demand and are required to promote growth. Therefore, in recent decades, a great amount of research
has been directed towards the development of lipid enrichment in order to improve larval fish survival and
growth. However, in fish, the biochemical and molecular processes related to highly unsaturated fatty acid
(HUFA) administration are still poorly understood. In the current study, the false percula clownfish, a short
larval phase marine species, was used as an experimental model and the effects of a standard and a HUFAsenriched
diet were tested through a molecular, biochemical, ultrastructural and morphometric approach. Our
results support the hypothesis that HUFA administration may improve larval development through the
presence of better structured mitochondria, a higher synthesis of energy compounds and coenzymes with a
central position in the metabolism, with respect to controls. This higher energy status was confirmed by better
growth performance and a shorter larval phase in larvae fed with an enriched diet with respect to the control.
This strategy of rapid growth and early energy storage may be considered positively adaptive and beneficial to
the survival of this species
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