Matrix Decompositions and Sparse Graph Regularity. (arXiv:1911.11868v1 [cs.DS])

We introduce and study a matrix decomposition that is a common generalization of the singular value decomposition (SVD), cut decomposition, CUR decomposition, and others. For any given set of pairs $P \subseteq \mathbb{R}^m \times \mathbb{R}^n$ and matrix $A \in \mathbb{R}^{m \times n}$, we write $A$ as a weighted sum of rank one matrices formed by…

The Calder\’on Problem For The Fractional Magnetic Operator. (arXiv:1911.11869v1 [math.AP])

We introduce the fractional magnetic operator involving a magnetic potential and an electric potential. We formulate an inverse problem for the fractional magnetic operator. We determine the electric potential from the exterior partial measurements of the associated Dirichlet-to-Neumann map by using Runge approximation property.

On a general Wright-Fisher model. (arXiv:1911.11874v1 [math.PR])

We study a generalized discrete-time multi-type Wright-Fisher population process. The mean-field dynamics of the stochastic process is induced by a general replicator difference equation. We prove several results regarding the asymptotic behavior of the model, focusing on the impact of the mean-field dynamics on it. One of the results is a limit theorem that describes…

Estimation and simulation of the transaction arrival process in intraday electricity markets. (arXiv:1901.09729v3 [econ.GN] UPDATED)

We examine the novel problem of the estimation of transaction arrival processes in the intraday electricity markets. We model the inter-arrivals using multiple time-varying parametric densities based on the generalized F distribution estimated by maximum likelihood. We analyse both the in-sample characteristics and the probabilistic forecasting performance. In a rolling window forecasting study, we simulate…

Empirical strategy-proofness. (arXiv:1907.12408v3 [econ.TH] UPDATED)

We study the plausibility of sub-optimal Nash equilibria of the direct revelation mechanism associated with a strategy-proof social choice function. By using the recently introduced empirical equilibrium analysis (Velez and Brown, 2019, arXiv:1804.07986) we determine that this behavior is plausible only when the social choice function violates a non-bossiness condition and information is not interior.…

First principles calculations on theoretical band gap improvement of IIIA-VA zinc-blende semiconductor InAs. (arXiv:1911.12045v1 [physics.comp-ph])

The structural, electronic, dielectric and vibrational properties of zinc-blende (ZB) InAs were studied within the framework of density functional theory (DFT) by employing local density approximation and norm-conserving pseudopotentials. The optimal lattice parameter, direct band gap, static dielectric constant, phonon frequencies and Born effective charges calculated by treating In-4d electrons as valence states are in…

Estimating relationship between the Time Over Threshold and energy loss by photons in plastic scintillators used in the J-PET scanner. (arXiv:1911.12059v1 [physics.ins-det])

Time-Over-Threshold (TOT) technique is being used widely due to its implications in developing the multi channel readouts mainly when fast signal processing is required. Using TOT technique as a measure of energy loss instead of charge integration methods significantly reduces the signals readout cost by combining the time and energy information. Therefore, this approach can…

Electrically controllable router of interlayer excitons. (arXiv:1911.12061v1 [physics.app-ph])

Optoelectronic devices which allow rerouting, modulation and detection of the optical signals would be extremely beneficial for telecommunication technology. One of the most promising platforms for such devices are excitonic devices, as they offer very efficient coupling to light. Of especial importance are those based on indirect excitons, because of their long lifetime. Here we…

Broadband Impulsive Stimulated Raman Scattering based on a Chirped Detection. (arXiv:1911.12086v1 [physics.chem-ph])

In Impulsive Stimulated Raman Scattering vibrational oscillations, coherently stimulated by a femtosecond Raman pulse, are real time monitored and read out as intensity modulations in the transmission of a temporally delayed probe pulse. Critically, in order to retrieve broadband Raman spectra, a fine sampling of the time delays between the Raman and probe pulses is…

Multiferroic Decorated Fe2O3 Monolayer Predicted from First Principles. (arXiv:1911.12088v1 [cond-mat.mtrl-sci])

Two-dimensional (2D) multiferroics exhibit cross-control capacity between magnetic and electric responses in reduced spatial domain, making them well suited for next-generation nanoscale devices; however, progress has been slow in developing materials with required characteristic properties. Here we identify by first-principles calculations robust 2D multiferroic behaviors in decorated Fe2O3 monolayer, showcasing N@Fe2O3 as a prototypical case,…