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The Cuatro Ciénegas Basin in the Chihuahuan Desert of Mexico was once a shallow sea. Some 43 million years ago, it became separated from the Gulf of Mexico. The basin is nutrient-poor and harbors a "l...
Rules For Superconductivity Mirrored In ‘Excitonic Insulator’（图）
Superconductivity Mirrored Excitonic Insulator
2017/12/19
Rice University physicists dedicated to creating the working components of a fault-tolerant quantum computer have succeeded in creating a previously unseen state of matter.The “topological excitonic i...
New insight into prediction of phase behavior of natural gas hydrate by different cubic equations of state coupled with various mixing rules
Gas Hydrate, Cubic equation of state Mixing rule Thermodynamic modeling
2018/4/2
Progress in hydrate thermodynamic study necessitates robust and fast models to be incorporated in reservoir simulation softwares. However, numerous models presented in the literature makes selection o...
'Rules of Life' outlines path to predicting phenotype（图）
Rules of Life outlines path predicting phenotype
2017/9/4
Imagine a world where scientists can predict with confidence whether crops will grow in extreme temperatures, just by understanding their genetic makeup. Consider a future where doctors can know what ...
Scientists have long known the ins and outs of equilibrium thermodynamics. Systems in equilibrium — a stable state of unchanging balance — are governed by a neat set of rules, making them predictable ...
NSF wants engineering researchers to bend rules (of classical physics)
NSF engineering researchers bend rules classical physics
2016/8/23
The National Science Foundation (NSF) has awarded $18 million to nine teams of engineering-led, interdisciplinary researchers to break the conventional ways in which light and acoustic waves propagate...
LITTLEWOOD-RICHARDSON RULES FOR GRASSMANNIANS
LITTLEWOOD-RICHARDSON GRASSMANNIANS special Schubert class
2015/12/17
The classical Littlewood-Richardson rule [LR] describes the structure constants
obtained when the cup product of two Schubert classes in the cohomology ring of
a complex Grassmannian is written as a...
We study the three point genus zero Gromov-Witten invariants
on the Grassmannians which parametrize non-maximal isotropic subspaces in
a vector space equipped with a nondegenerate symmetric or skew-...
Strong Rules for Discarding Predictors in Lasso-type Problems
Strong Rules Discarding Predictors Lasso-type Problems
2015/8/21
We consider rules for discarding predictors in lasso regression and related problems, for computational efficiency. El Ghaoui et al. (2010) propose “SAFE” rules, based on univariate inner products bet...
When the worst case integration error in a family of functions decays
as nfor some > 1 and simple averages along an extensible sequence
match that rate at a set of sample sizes n1 < n2 < < 1...
A Quantitative Approach to Incentives: Application to Voting Rules
Voting Rules Quantitative
2015/7/15
We present a general approach to quantifying a mechanism’s susceptibility to
strategic manipulation, based on the premise that agents report their preferences
truthfully if the potential gain from b...
The Majority Rules When Baboons Vote With Their Feet
Majority Rules Baboons Vote Their Feet
2015/7/13
Olive baboon troops decide where to move democratically, despite their hierarchical social order, according to a new report in Science magazine by Smithsonian researchers and colleagues. At the Mpala ...
CHIRAL SUM-RULES AND THEIR PHENOMENOLOGY
Vector spectrum function the lepton decay positive negative electron scattering experiment data the spectral function database
2014/12/23
We present an analysis of four sum rules, each based on chiral symmetry and containing the difference ρV(s) − ρA(s) of isovector vector and axialvector spectral functions. Experimental data from...
Calculation of a weak nonleptonic matrix element using “Weinberg” sum rules
Weak matrix element vector and axis vector spectrum function spectral function
2014/12/23
There is a ``toy'' weak matrix element which can be expressed as an integral over the vector and axial vector spectral functions, $\rho_V (s) - \rho_A (s)$. I review our recent evaluation of these spe...
Inverse-moment chiral sum rules
Inverse moment chiral perturbation theory double line the isospin hypercharged vector propagators
2014/12/23
A general class of inverse-moment sum rules was previously derived by the authors in a chiral perturbation theory (ChPT) study at two-loop order of the isospin and hypercharge vector-current propagato...