197,894 research outputs found
Action of the mobius group ¨ M = hx, y : x 2 = y 6 = 1i on certain real quadratic fields
No full textLet C 0 = C ∪ {∞} be the extended complex plane and M = ­ x, y : x 2 = y 6 = 1® , where x(z) = −1 3z and y(z) = −1 3(z+1) are the linear fractional transformations from C 0 → C 0 . Let m be a squarefree positive integer. Then Q∗ ( √ n) = { a+ √ n c : a, c 6= 0, b = a 2−n c ∈ Z and (a, b, c) = 1} where n = k 2m, is a proper subset of Q( √ m) for all k ∈ N. For non-square n = 3h Qr i=1 p ki i , it was proved in an earlier paper by the same authors that the set Q 000 ( √ n) = { α t : α ∈ Q∗ ( √ n), t = 1, 3} is M-set ∀ h ≥ 0 whereas if h = 0 or 1, then Q∗∗∗√ n) = { a+ √ n c : a+ √ n c ∈ Q∗ ( √ n) and 3 | c} is an M-subset of Q 000 ( √ n) = Q∗ ( √ n) ∪ Q∗∗∗( √ 9n). In this paper we prove that if h ≥ 2, then Q 000 ( √ n) = (Q∗ ( pn 9 )\Q∗∗∗( pn 9 ))∪Q∗ ( √ n)∪Q∗∗∗( √ 9n) and also determine its proper M-subsets. In particular Q( √ m) \ Q = ∪Q 000 ( √ k 2m) for all k ∈ N
Unimpaired phase-sensitive amplification by vector four-wave mixing near the zero-dispersion frequency
No full textPhase-sensitive amplification (PSA), which is produced by degenerate four-wave mixing (FWM) in a randomly-birefringent fiber, has the potential to improve the performance of optical communication systems. Scalar FWM, which is driven by parallel pumps, is impaired by the generation of pump-pump and pump-signal harmonics, which limit the level, and modify the phase sensitivity, of the signal gain. In contrast, vector FWM, which is driven by perpendicular pumps, is not impaired by the generation of harmonics. Vector FWM produces PSA with the classical properties of a one-mode squeezing transformation. © 2007 Optical Society of America
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
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
Competition and risk-taking in investment banking
No full textHow does competition affect the investment banking business and the risks individual institutions are exposed to? Using a large sample of investment banks operating in seven developed economies over 1997-2014, we apply a panel VAR model to examine the relationships between competition and risk without assuming any a priori restrictions. Our main finding is that investment banks’ higher risk exposure, measured as a long-term capital-at-risk and return volatility, was facilitated by greater competitive pressures especially for full service investment banks but also for boutique investment banks. Overall, we find some evidence that more competition leads to more fragility before and during the recent financial crisis
Privatization: Implications Of A Shift From State To Private Ownership
No full textPrivatization—defined here as the transfer of ownership of state-owned organizations to private parties—has attracted the attention of scholars across multiple fields. Privatization programs have been based on the assumption, grounded in microeconomic theory, that a shift from public to private ownership will incentivize more efficient management of available resources. However, failure to deliver the expected outcomes in some cases and the more nuanced perspective on state-ownership offered by recent research in management seem to challenge this assumption, calling for revisiting this literature. Our comparative review of existing studies suggests that the mixed results of privatization programs could be partly explained by what was privatized, how it was privatized, and the regulatory regime under which it was privatized. By doing so, our review provides conceptual clarity and structure to a rich but fragmented body of literature, making seemingly divergent findings more legible, outlining theoretical gaps, and identifying avenues for future exploration
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Environmental toxicity, redox signaling and lung inflammation:the role of glutathione
No full textGlutathione (gamma-glutamyl-cysteinyl-glycine, GSH) is the most abundant intracellular antioxidant thiol and is central to redox defense during oxidative stress. GSH metabolism is tightly regulated and has been implicated in redox signaling and also in protection against environmental oxidant-mediated injury. Changes in the ratio of the reduced and disulfide form (GSH/GSSG) can affect signaling pathways that participate in a broad array of physiological responses from cell proliferation, autophagy and apoptosis to gene expression that involve H(2)O(2) as a second messenger. Oxidative stress due to oxidant/antioxidant imbalance and also due to environmental oxidants is an important component during inflammation and respiratory diseases such as chronic obstructive pulmonary disease, idiopathic pulmonary fibrosis, acute respiratory distress syndrome, and asthma. It is known to activate multiple stress kinase pathways and redox-sensitive transcription factors such as Nrf2, NF-kappaB and AP-1, which differentially regulate the genes for pro-inflammatory cytokines as well as the protective antioxidant genes. Understanding the regulatory mechanisms for the induction of antioxidants, such as GSH, versus pro-inflammatory mediators at sites of oxidant-directed injuries may allow for the development of novel therapies which will allow pharmacological manipulation of GSH synthesis during inflammation and oxidative injury. This article features the current knowledge about the role of GSH in redox signaling, GSH biosynthesis and particularly the regulation of transcription factor Nrf2 by GSH and downstream signaling during oxidative stress and inflammation in various pulmonary diseases. We also discussed the current therapeutic clinical trials using GSH and other thiol compounds, such as N-acetyl-l-cysteine, fudosteine, carbocysteine, erdosteine in environment-induced airways disease
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