Reply to Comment on "Dynamical corrections to the DFT-LDA electron conductance in nanoscale systems"

We reply to the comment by Jung, Bokes, and Godby (arXiv:0706.0140) on our paper Phys. Rev. Lett. 94, 186810 (2005). We show that the results in their comment should not be taken as an indication that the viscosity corrections to the conductance of real nanoscale structures are small. A more accurate treatment of the density and current density distribution and of the electronic correlations may yield much larger corrections in realistic systems.Comment: Reply to the comment by Jung et al (arXiv:0706.0140). 1 page, no figures, to appear in PR

Inelastic J/psi Photoproduction

Inelastic photoproduction of $J/\psi$ particles at high energies is one of the processes to determine the gluon distribution in the nucleon. We have calculated the QCD radiative corrections to the color-singlet model of this reaction. They are large at moderate photon energies, but decrease with increasing energies. The cross section and the $J/\psi$ energy spectrum are compared with the available fixed-target photoproduction data and predictions are given for the HERA energy range.Comment: 14 pages, latex, 7 uuencoded figure

Analysing Student Work Involving Geometric Concepts

Hyunyi Jung reflects on why students struggle to understand trigonometry

Inelastic J/ψJ/\psi photoproduction

Inelastic photoproduction of $J/\psi$ particles at high energies is one of the processes to determine the gluon distribution in the nucleon. The QCD radiative corrections to the color-singlet model of this reaction have recently been calculated. They are large at moderate photon energies, but decrease with increasing energies. I compare the cross section and the ${J/\psi}$ energy spectrum with the available fixed-target photoproduction data. Predictions for the HERA energy range are given which demonstrate the sensitivity of the result to the parametrization of the gluon distribution in the small-$x$ region. (Talk presented at the Workshop on "Heavy Quark Physics", Bad Honnef, FRG, Dec. 1994)Comment: 11 pages, LaTeX; figures are included via epsfig; the corresponding postscript files are uuencode

Transport in Almost Integrable Models: Perturbed Heisenberg Chains

The heat conductivity kappa(T) of integrable models, like the one-dimensional spin-1/2 nearest-neighbor Heisenberg model, is infinite even at finite temperatures as a consequence of the conservation laws associated with integrability. Small perturbations lead to finite but large transport coefficients which we calculate perturbatively using exact diagonalization and moment expansions. We show that there are two different classes of perturbations. While an interchain coupling of strength J_perp leads to kappa(T) propto 1/J_perp^2 as expected from simple golden-rule arguments, we obtain a much larger kappa(T) propto 1/J'^4 for a weak next-nearest neighbor interaction J'. This can be explained by a new approximate conservation law of the J-J' Heisenberg chain.Comment: 4 pages, several minor modifications, title change

Improved tolerability and efficaciousness of MiraLAX-Gatorade when compared to GoLYTELY in the outpatient setting

A clinical decision report using Gu P, Lew D, Jung OS, et al. Comparing the Real-World Effectiveness of Competing Colonoscopy Preparations: Results of a Prospective Trial. Am J Gastroenterol. 2019;114(2):305-314. https://doi.org/10.14309/ajg.0000000000000057 for a patient reluctant to undergo colonoscopy screening due to concerns about GoLYTLEY\u27s tolerability

Two Ways of Being Conscious: The Notion of Psychic Conversion

In this essay I will present an overview of what I have called psychic conversion. I will begin by narrating the birth of the idea, then will present a brief schematic history of its development and principal applications to date, and will conclude by presenting my current thinking, which involves connections with the philosophy of Martin Heidegger, the depth psychology of C. G. Jung, and the mimetic theory of Rene Girard. It will be clear from the first section that Heidegger and Jung were influential in the very emergence of the idea, but in my current work I have developed some new perspectives in their regard, and I will mention these at the end

Intrinsic Charm In Proton and J/ψJ/\psi Photoproduction at High Energies

Based on a perturbative theory of quantum chromodynamics and non-relativistic quark model, associated $J/\psi$ plus open charm photoproduction on charm quarks in a proton via partonic subprocess $\gamma c\to J/\psi c$ is discussed. It is shown that the value and energy dependence of the cross section for such process remarkably depends on the choice of charm distribution function in a proton. In the region of small $z=E_J/E_{\gamma}<0.2$ the contribution of the $\gamma c\to J/\psi c$ subprocess in the inelastic $J/\psi$ photoproduction spectra is larger than the contribution of the photon-gluon fusion subprocess. At the energy range of HERA collider intrinsic charm contribution in the total inclusive $J/\psi$ photoproduction cross section may be equal to 4\% of the dominant contribution of photon-gluon fusion mechanism.Comment: 11 pages, submitted to Mod.Phys.Lett.