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  Partner: UNT College of Arts and Sciences
 Collection: UNT Scholarly Works
Projecting on polynomial solutions of second order partial differential operators

Projecting on polynomial solutions of second order partial differential operators

Date: June 2007
Creator: Anghel, Nicolae
Description: This article discusses projecting on polynomial solutions of second order partial differential operators. Abstract: We extend Axler and Ramey's method of constructing the harmonic part of a homogeneous polynomial to polynomial solutions of homogeneous elliptic real second order partial differential operators with constant coefficients. The results yield a constructive solution to a Dirichlet problem with polynomial boundary data.
Contributing Partner: UNT College of Arts and Sciences
The Promise and Perils of Transformative Research

The Promise and Perils of Transformative Research

Date: March 2012
Creator: Frodeman, Robert & Holbrook, J. Britt
Description: This report is on the workshop 'Transformative Research: Ethical and Societal Implications'. Workshop conversations cluster under the four headings of the history and definitions, promotion, evaluation, and integration of transformative research (TR): 1. History and Definitions: The National Science Board's 2007 report (NSB-07-32) on transformative research called for more effort directed at defining TR. The present report offers additional context and clarity regarding meanings of the term. But it also argues that there are virtues in leaving the term open to multiple interpretations. 2. Promotion: The report welcomes new mechanisms for promoting TR, such as NSF 'CREATIV' grants. It embraces additional means for promoting TR, such as increased emphasis on interdisciplinary research, and explores how different interpretations of how TR occurs imply different strategies for promoting TR. It also calls for increased attention to the broader societal impacts of TR at the levels of policy, of NSF programs, and of individual research projects. 3. Evaluation: The report emphasizes the need to develop means for evaluating attempts to promote TR. It also concludes that research should be directed toward evaluating transformative research at the project level. 4. Integration: The report suggests that consideration of the broader societal impacts of TR be ...
Contributing Partner: UNT College of Arts and Sciences
Propagation of 0π pulses in a gas of three-level atoms

Propagation of 0π pulses in a gas of three-level atoms

Date: June 15, 2011
Creator: Sun, Dong; Sariyanni, Zoe-Elizabeth; Das, Sumanta & Rostovtsev, Yuri V.
Description: In this article, the authors have theoretically studied the pulsed regime of electromagnetically induced transparency. In particular, simulations of propagation of Gaussian and 0π copropagating laser pulses in a medium consisting of three-level Λ atoms have been performed. It has been found that even at the two-photon resonance, the length of propagation for the 0π pulses is much smaller than the one for the Gaussian probe pulses. Using the dark and bright basis, the authors explain this behavior. Some possible applications are discussed.
Contributing Partner: UNT College of Arts and Sciences
Publisher's Note: Beyond the Death of Linear Response: 1/f Optimal Information Transport [Phys. Rev. Lett. 105,040601 (2010)]

Publisher's Note: Beyond the Death of Linear Response: 1/f Optimal Information Transport [Phys. Rev. Lett. 105,040601 (2010)]

Date: August 3, 2010
Creator: Aquino, Gerardo; Bologna, Mauro; Grigolini, Paolo & West, Bruce J.
Description: This is a Publisher's Note for the article 'Beyond the Death of Linear Response: 1/f Optimal Information Transport' [Phys. Rev. Lett. 105, 040601 (2010)].
Contributing Partner: UNT College of Arts and Sciences
A Putative Transporter is Essential for Integrating Nutrient and Hormone Signaling with Lateral Root Growth and Nodule Development in Medicago truncatula

A Putative Transporter is Essential for Integrating Nutrient and Hormone Signaling with Lateral Root Growth and Nodule Development in Medicago truncatula

Date: 2010
Creator: Yendrek, Craig R.; Lee, Yi-Ching; Morris, Viktoriya; Liang, Yan; Pislariu, Catalina I.; Burkart, Graham et al
Description: This article discusses a putative transporter for integrating nutrient and hormone signaling with lateral root growth and nodule development in Medicago truncatula. Legume root architecture involves not only elaboration of the root system by the formation of lateral roots but also the formation of symbiotic root nodules in association with nitrogen-fixing soil rhizobia. The Medicago truncatula LATD/NIP gene plays an essential role in the development of both primary and lateral roots as well as nodule development. We have cloned the LATD/NIP gene and show that it encodes a member of the NRT1(PTR) transporter family. LATD/NIP is expressed throughout the plant. pLATD/NIP-GFP promoter-reporter fusions in transgenic roots establish the spatial expression of LATD/NIP in primary root, lateral root and nodule meristems and the surrounding cells. Expression of LATD/NIP is regulated by hormones, in particular by abscisic acid which has been previously shown to rescue the primary and lateral root meristem arrest of latd mutants. latd mutants respond normally to ammonium but have defects in responses of the root architecture to nitrate. Taken together, these results suggest that LATD/NIP may encode a nitrate transporter or transporter of another compound.
Contributing Partner: UNT College of Arts and Sciences
Quantification of emotional bias by an Emotional-Gain Model

Quantification of emotional bias by an Emotional-Gain Model

Date: July 18, 2011
Creator: Tam, Nicoladie D.
Description: This article accompanies a poster presentation on the quantification of emotional bias by an Emotional-Gain model. The authors have developed a computational model that quantifies emotion objectively based on neurobiological mechanisms that increases the chance of survival in the real world. This model is based on the EMOTION-I and EMOTION-II models with the extension of proportionality hypothesis added to the desirable gain signal to these models.
Contributing Partner: UNT College of Arts and Sciences
Quantification of fairness bias by a Fairness-Equity Model

Quantification of fairness bias by a Fairness-Equity Model

Date: July 18, 2011
Creator: Tam, Nicoladie D.
Description: This paper accompanies a poster presentation on the quantification of fairness bias by a Fairness-Equity Model. The authors have developed a computational model that quantifies fairness objectively based on equity/disparity between the shares by two individuals. The Fairness-Equity Model represents the relationship between fairness perception intensity and the disparity (or equity) between two individuals graphically.
Contributing Partner: UNT College of Arts and Sciences
Quantitative Computational Thermochemistry of Transition Metal Species

Quantitative Computational Thermochemistry of Transition Metal Species

Date: May 15, 2007
Creator: DeYonker, Nathan J.; Peterson, Kirk A.; Steyl, Gideon; Wilson, Angela K. & Cundari, Thomas R., 1964-
Description: This article discusses quantitative computational thermochemistry of transition metal species. The correlation consistent Composite Approach (ccCA), which has been shown to achieve chemical accuracy (±1 kcal mol⁻¹) for a large benchmark set of main group and s-block metal compounds, is used to compute enthalpies of formation for a set of 17 3d transition metal species. The training set includes a variety of metals, ligands, and bonding types. Using the correlation consistent basis sets for the 3d transition metals, the authors find that gas-phase enthalpies of formation can be efficiently calculated for inorganic and organometallic molecules with ccCA. However, until the reliability of gas-phase transition metal thermochemistry is improved, both experimentally and theoretically, a large experimental training set where uncertainties are near ±1 kcal mol⁻¹ (akin to commonly used main group benchmarking sets) remains an ambitious goal. For now, an average deviation of ±3 kcal mol⁻¹ appears to be the initial goal of "chemical accuracy" for ab initio transition metal model chemistries. The ccCA is also compared to a more robust but relatively expensive composite approach primarily utilizing large basis set coupled cluster computations. For a smaller training set of eight molecules, ccCA has a mean absolute deviation (MAD) of 3.4 ...
Contributing Partner: UNT College of Arts and Sciences
Quantum Entanglement and Entropy

Quantum Entanglement and Entropy

Date: August 20, 2001
Creator: Giraldi, Filippo & Grigolini, Paolo
Description: This article discusses quantum entanglement and entropy. Entanglement is the fundamental quantum property behind the now popular field of quantum transport of information. This quantum property is incompatible with the separation of a single system into two uncorrelated subsystems. Consequently, it does not require the use of an additive form of entropy. The authors discuss the problem of the choice of the most convenient entropy indicator, focusing their attention on a system of two qubits, and on a special set, denoted by ℑ. This set contains both the maximally and partially entangled states that are described by density matrices diagonal in the Bell basis set. The authors select this set for the main purpose of making their work of analysis more straightforward. As a matter of fact, the authors find that in general the conventional von Neumann entropy is not a monotonic function of the entanglement strength. This means that the von Neumann entropy is not a reliable indicator of the departure from the condition of maximum entanglement. The authors study the behavior of a form of nonadditive entropy, made popular by the 1988 work by Tsallis [J. Stat. Phys. 52, 479 (1988)]. The authors show that in the set ...
Contributing Partner: UNT College of Arts and Sciences
Racial and Ethnic Politics in the 2012 Presidential Primaries

Racial and Ethnic Politics in the 2012 Presidential Primaries

Date: April 24, 2012
Creator: Carey, Tony E.
Description: This presentation is part of the faculty lecture series UNT Speaks Out on the 2012 Presidential Primaries. In this presentation, the author discusses how members of different racial and ethnic backgrounds responded to the 2012 Republican primary candidates.
Contributing Partner: UNT College of Arts and Sciences