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Results for "Sohae Chung"

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A Deep Unsupervised Learning Approach Toward MTBI Identification Using Diffusion MRIFeb 08 2018Apr 11 2018Mild traumatic brain injury is a growing public health problem with an estimated incidence of over 1.7 million people annually in US. Diagnosis is based on clinical history and symptoms, and accurate, concrete measures of injury are lacking. This work ... More
A Deep Unsupervised Learning Approach Toward MTBI Identification Using Diffusion MRIFeb 08 2018Mild traumatic brain injury (mTBI) is a growing public health problem with an estimated incidence of one million people annually in US. Neurocognitive tests have been used to both assess the patient condition and to monitor the patient progress. This ... More
A Machine Learning Approach For Identifying Patients with Mild Traumatic Brain Injury Using Diffusion MRI ModelingAug 27 2017While diffusion MRI has been extremely promising in the study of MTBI, identifying patients with recent MTBI remains a challenge. The literature is mixed with regard to localizing injury in these patients, however, gray matter such as the thalamus and ... More
MTBI Identification From Diffusion MR Images Using Bag of Adversarial Visual FeaturesJun 27 2018In this work, we propose bag of adversarial features (BAF) for identifying mild traumatic brain injury (MTBI) patients from their diffusion magnetic resonance images (MRI) (obtained within one month of injury) by incorporating unsupervised feature learning ... More
Identifying Mild Traumatic Brain Injury Patients From MR Images Using Bag of Visual WordsOct 18 2017Feb 14 2018Mild traumatic brain injury (mTBI) is a growing public health problem with an estimated incidence of one million people annually in US. Neurocognitive tests are used to both assess the patient condition and to monitor the patient progress. This work aims ... More
Nonequilibrium finite-frequency noise of a resonance-level quantum dot close to a dissipative quantum phase transition: Functional Renormalization Group approachesOct 25 2010Nov 15 2012We calculate the finite-frequency current noise of a nonequilibrium resonance-level quantum dot close to a dissipative quantum phase transition of the Kosterlitz-Thouless (KT) type between a de-localized phase for weak dissipation and a localized phase ... More
Dynamical properties of a nonequilibrium quantum dot close to localized-delocalized quantum phase transitionsAug 23 2010We calculate the dynamical decoherence rate and susceptibility of a nonequilibrium quantum dot close to the delocalized-to-localized quantum phase transitions. The setup concerns a resonance-level coupled to two spinless fermionic baths with a finite ... More
Optimal regularized inverse matrices for inverse problemsMar 18 2016In this paper, we consider optimal low-rank regularized inverse matrix approximations and their applications to inverse problems. We give an explicit solution to a generalized rank-constrained regularized inverse approximation problem, where the key novelties ... More
An Efficient Approach for Computing Optimal Low-Rank Regularized Inverse MatricesApr 06 2014Standard regularization methods that are used to compute solutions to ill-posed inverse problems require knowledge of the forward model. In many real-life applications, the forward model is not known, but training data is readily available. In this paper, ... More
Virtual Poincaré polynomial of the space of stable pairs supported on quintic curvesSep 17 2014May 31 2015Let $\mathbf{M}^{\alpha}(d,\chi)$ be the moduli space of $\alpha$-stable pairs $(s,F)$ on the projective plane $\mathbb{P}^2$ with Hilbert polynomial $\chi(F(m))=dm+\chi$. For sufficiently large $\alpha$ (denoted by $\infty$), it is well known that the ... More
Numerical study on diverging probability density function of flat-top solitons in an extended Korteweg-de Vries equationAug 15 2009We consider an extended Korteweg-de Vries (eKdV) equation, the usual Korteweg-de Vries equation with inclusion of an additional cubic nonlinearity. We investigate the statistical behaviour of flat-top solitary waves described by an eKdV equation in the ... More
Fragmentation of black hole scaling throats in N=2 supergravityDec 20 2011We find an instanton analogous to the Brill instanton that describes the fragmentation of a single-centered black hole scaling throat of charge $\Gamma_1 + \Gamma_2 + \Gamma_3$ in N=2 supergravity to three disconnected throats of charges $\Gamma_1, \Gamma_2, ... More
Tunneling between single and multi-centered black hole configurationsJan 14 2012Aug 20 2012We find a gravitational instanton that connects an initial state corresponding to a single-centered extremal Reissner-Nordstrom (ERN) black hole configuration, to a final state corresponding to a multi-centered configuration. This instanton is interpreted ... More
Parity Violation in Top Quark Pair Production at the Fermilab Tevatron ColliderNov 18 1994The leading weak corrections to the production of top quark pairs via $q\bar{q} \to t\bar{t}$ in $p\bar{p}$ collisions are evaluated. The chromo-anapole form factor of the top quark and effects of parity violation are studied in the Standard Model (SM) ... More
Production of CP-Odd Higgs Bosons with Large Transverse Momentum at Hadron SupercollidersOct 01 1993Apr 05 1994A two Higgs doublet model is employed to study the production of a CP-odd Higgs boson ($A$) associated with a large transverse momentum jet ($j$) at hadron supercolliders. The cross section of $pp \to jA+X$ is evaluated with four subprocesses: $gg \to ... More
Sharp estimates for the commutator of the Hilbert transform on weighted Lebesgue spacesApr 21 2009Nov 22 2010This paper has been withdrawn by the author due to some error in the result
On Tightness of Mutual Dependence Upperbound for Secret-key Capacity of Multiple TerminalsMay 21 2008Jun 16 2008Csiszar and Narayan[3] defined the notion of secret key capacity for multiple terminals, characterized it as a linear program with Slepian-Wolf constraints of the related source coding problem of communication for omniscience, and upper bounded it by ... More
Diffusion-Driven Instability of a fourth order systemJul 03 2018We analyze diffusion-driven (Turing) instability of a reaction-diffusion system. The innovation is that we replace the traditional Laplacian diffusion operator with a combination of the fourth order bi-Laplacian operator and the second order Laplacian. ... More
A desingularization of Kontsevich's compactification of twisted cubics in $V_5$Feb 05 2019By definition, the del Pezzo $3$-fold $V_5$ is the intersection of $\mathrm{Gr}(2,5)$ with three hyperplanes in $\mathbb{P}^9$ under the Pl\"ucker embedding. Rational curves in $V_5$ have been studied in various contents of Fano geometry. In this paper, ... More
Search for Neutron-Antineutron Oscillations Using Multiprong Events in Soudan 2May 28 2002We have searched for neutron-antineutron oscillations using the 5.56 fiducial kiloton-year exposure of the Soudan 2 iron tracking calorimeter. We require candidate n-nbar occurrences to have .GE. 4 prongs (tracks and showers) and to have kinematics compatible ... More
A Retrieval Framework and Implementation for Electronic Documents with Similar LayoutsOct 16 2018As the number of digital documents requiring investigation increases, it has become more important to identify relevant documents to a given case. There have been continual demands for finding relevant files in order to overcome this kind of issues. Regarding ... More
Measures for a Multidimensional MultiverseNov 19 2012Nov 16 2014We explore the phenomenological implications of generalizing measures to a multidimensional multiverse. We consider a simple model in which the vacua are nucleated from a $D$-dimensional parent spacetime through dynamical compactification of the extra ... More
The Design of the NetBSD I/O SubsystemsMay 19 2016This book describes the source code of the NetBSD Operating System Release 1.6 in SUN UltraSPARC 64-bit platform by annotating related excerpts from references and user manuals on the NetBSD Operating System. The goal of this book is to provide necessary ... More
Three-dimensional kaon and pion emission source extraction from \sqrt{s_{NN}} = 200 GeV Au+Au collisions at RHIC-STARDec 27 2010Dec 30 2010Three-dimensional source images for mid-rapidity, low transverse momentum kaon and pion pairs have been extracted from central Au+Au collisions data at \sqrt{s_{NN}} = 200 GeV by the STAR experiment at RHIC. The pion source function displays significant ... More
Distributed Denial of Service is a Scalability ProblemApr 01 2011Apr 13 2011Distributed denial of service attacks are often considered a security problem. While this may be the way to view the problem with today's Internet, new network architectures attempting to address the issue should view it as a scalability problem. In addition, ... More
Precisely Analyzing Loss in Interface Adapter ChainsNov 30 2010Interface adaptation allows code written for one interface to be used with a software component with another interface. When multiple adapters are chained together to make certain adaptations possible, we need a way to analyze how well the adaptation ... More
Sharp estimates for the commutators of the Hilbert, Riesz transforms and the Beurling-Ahlfors operator on weighted Lebesgue spacesJan 05 2010We prove that the operator norm on weighted Lebesgue space L2(w) of the commutators of the Hilbert, Riesz and Beurling transforms with a BMO function b depends quadratically on the A2-characteristic of the weight, as opposed to the linear dependence known ... More
Hawking Radiation and Entropy from Horizon Degrees of FreedomNov 02 2010May 29 2012We study the thermodynamic properties of horizons using the dynamical description of the gravitational degrees of freedom at a horizon found in a previous work. We use the action of the horizon degrees of freedom to posit an ansatz Liouville action in ... More
Weighted inequalities for multivariable dyadic paraproducsJan 09 2010Nov 22 2010Using Wilson's Haar basis in $\R^n$, which is different than the usual tensor product Haar functions, we define its associated dyadic paraproduct in $\R^n$. We can then extend "trivially" Beznosova's Bellman function proof of the linear bound in $L^2(w)$ ... More
Modeling network technology deployment rates with different network modelsApr 05 2011To understand the factors that encourage the deployment of a new networking technology, we must be able to model how such technology gets deployed. We investigate how network structure influences deployment with a simple deployment model and different ... More
Efficient Batch Update of Unique Identifiers in a Distributed Hash Table for Resources in a Mobile HostJun 05 2007Jun 21 2010Resources in a distributed system can be identified using identifiers based on random numbers. When using a distributed hash table to resolve such identifiers to network locations, the straightforward approach is to store the network location directly ... More
Dynamics of Diffeomorphism Degrees of Freedom at a HorizonNov 02 2010Mar 19 2011We define a set of boundary conditions that ensure the presence of a null hypersurface with the essential characteristics of a horizon, using the formalism of weakly isolated horizons as a guide. We then determine the diffeomorphisms that preserve these ... More
The Study of Entangled States in Quantum Computation and Quantum Information ScienceAug 11 2008This thesis explores the use of entangled states in quantum computation and quantum information science. Entanglement, a quantum phenomenon with no classical counterpart, has been identified as an important and quantifiable resource in many areas of theoretical ... More
Higgs Decays into LeptonsSep 30 2002We discuss the prospects for the discovery of neutral Higgs bosons ($\phi^0 = H^0, h^0, A^0$) in multi-Higgs doublet models via their decays into leptons at hadron colliders. A major focus will be searching for Higgs bosons produced with bottom quarks ... More
Compressed Secret Key Agreement: Maximizing Multivariate Mutual Information Per BitJun 14 2017Oct 02 2017The multiterminal secret key agreement problem by public discussion is formulated with an additional source compression step where, prior to the public discussion phase, users independently compress their private sources to filter out strongly correlated ... More
Quantum criticality in Kondo quantum dot coupled to helical edge states of interacting 2D topological insulatorsJan 26 2012Apr 01 2012We investigate theoretically the quantum phase transition (QPT) between the one-channel Kondo (1CK) and two-channel Kondo (2CK) fixed points in a quantum dot coupled to helical edge states of interacting 2D topological insulators (2DTI) with Luttinger ... More
Kondo effect in coupled quantum dots with RKKY interaction: Finite temperature and magnetic field effectsJul 28 2006We study transport through two quantum dots coupled by an RKKY interaction as a function of temperature and magnetic field. By applying the Numerical Renormalization Group (NRG) method we obtain the transmission and the linear conductance. At zero temperature ... More
Evidence for a long range structure in the pion emission source in Au+Au collisions at RHICOct 11 2005The PHENIX experiment, has recently acquired $\sim$ 1 billion minimum bias Au+Au events at $\sqrt s = 200$GeV during the year-2004 run. This high statistics data set, coupled with a state-of-the-art analysis technique, allows for the extraction of 3D ... More
Asymptotic Symmetries of Rindler Space at the Horizon and Null InfinityMay 05 2010Jun 21 2010We investigate the asymptotic symmetries of Rindler space at null infinity and at the event horizon using both systematic and ad hoc methods. We find that the approaches that yield infinite-dimensional asymptotic symmetry algebras in the case of anti-de ... More
Instability of Near-Extremal Black Holes in N=2, d=4 SupergravityDec 20 2011Oct 25 2012As a precursor to studying the bound states of multiple non-extremal black holes in $\mathcal{N}=2$, $d=4$ supergravity, we investigate the stability of a near-extremal D0-D4 black hole in the probe limit, when the parameters of the black hole solution ... More
The Effective Fluid Approach to Cosmological Nonlinearities: Applications to PreheatingSep 07 2010In [arXiv:1004.2488], Baumann et al. present a new formalism for studying cosmological systems where the characteristic scale of non-linearities is much smaller than the Hubble scale. By integrating out the short-wavelength modes, it is possible to obtain ... More
The Search for Higgs Bosons of Minimal Supersymmetry at the LHCFeb 18 1998The prospects for discovering neutral Higgs bosons in the minimal supersymmetric model (MSSM) and in the minimal supergravity model at the LHC are investigated. Two special discovery channels are discussed: (i) the decay mode of the MSSM CP-odd Higgs ... More
Search for PQ AxionsDec 08 2018Dec 11 2018A major fraction of the mass content of the universe is composed of dark matter (DM), i.e. particles not interacting significantly with electromagnetic radiation, with ordinary matter or self-interacting (cold dark matter). The axion is originally proposed ... More
From Quasirandom graphs to Graph Limits and GraphletsMar 10 2012Nov 05 2013We generalize the notion of quasirandom which concerns a class of equivalent properties that random graphs satisfy. We show that the convergence of a graph sequence under the spectral distance is equivalent to the convergence using the (normalized) cut ... More
Convergence and Divergence of Approximations in terms of the Derivatives of Heat KernelSep 08 2014We consider an approximate solution to the heat equation which consists of the derivatives of heat kernel. Some conditions in the initial value, under which the approximation converges to the solution of the heat equation or diverges when the number of ... More
Success Exponent of Wiretapper: A Tradeoff between Secrecy and ReliabilityMay 23 2008May 31 2008Equivocation rate has been widely used as an information-theoretic measure of security after Shannon[10]. It simplifies problems by removing the effect of atypical behavior from the system. In [9], however, Merhav and Arikan considered the alternative ... More
Andreev reflection in 2D relativistic materials with realistic tunneling transparency in normal-metal-superconductor junctionsJan 03 2017The Andreev conductance across 2d normal metal (N)/superconductor (SC) junctions with relativistic Dirac spectrum is investigated theoretically in the Blonder-Tinkham-Klapwijk formalism. It is shown that for relativistic materials, due to the Klein tunneling ... More
Concept of spinsonde for multi-cycle measurement of vertical wind profile of tropical cyclonesSep 23 2014Tropical cyclones and cyclogenesis are active areas of research. Chute-operated dropsondes jointly developed by NASA and NCAR are capable of acquiring high resolution vertical wind profile of tropical cyclones. This paper proposes a chute-free vertical ... More
Evaluation of a Class of Two-Scale Three-Loop Vacuum DiagramsMar 15 2002As a generalization of a previous work [Phys. Rev. D. {\bf 59}, 105014 (1999)], we compute analytically a class of three-loop vacuum diagrams with two {\em arbitrarily} different mass scales. We use a decomposition algorithm in which the integrand of ... More
Calculation of a Class of Three-Loop Vacuum Diagrams with Two Different Mass ValuesMay 23 1998Apr 23 1999We calculate analytically a class of three-loop vacuum diagrams with two different mass values, one of which is one-third as large as the other, using the method of Chetyrkin, Misiak, and M\"{u}nz in the dimensional regularization scheme. All pole terms ... More
Quantum criticality out of equilibrium in the pseudogap Kondo modelJul 12 2011We theoretically investigate the non-equilibrium quantum phase transition in a generic setup: the pseudogap Kondo model where a quantum dot couples to two-left (L) and right (R)-voltage-biased fermionic leads with power-law density of states (DOS) with ... More
Competing Orders and Superconductivity in the Doped Mott Insulator on the Shastry-Sutherland LatticeOct 17 2003Quantum antiferromagnets on geometrically frustrated lattices often allow a number of unusual paramagnetic ground states. The fate of these Mott insulators upon doping is an important issue that may shed some light on the high $T_c$ cuprate problem. We ... More
Reduction of a Class of Three-Loop Vacuum Diagrams to Tetrahedron TopologiesJan 16 2001Jan 19 2001We obtain finite parts (as well as $\epsilon$-pole parts) of massive three-loop vacuum diagrams with three-point and/or four-point interaction vertices by reducing them to tetrahedron diagrams with both massive and massless lines, whose finite parts were ... More
Network topology: detecting topological phase transitions in the Kitaev chain and the rotor planeAug 01 2013May 08 2014We propose a novel network measure of topological invariants, called small-worldness, for identifying topological phase transitions of quantum and classical spin models. Small-worldness is usually defined in the study of social networks based on the best ... More
Can the vertical motions in the eyewall of tropical cyclones support persistent UAV flight?Aug 15 2014Powered flights in the form of manned or unmanned aerial vehicles (UAVs) have been flying into tropical cyclones to obtain vital atmospheric measurements with flight duration typically lasting between 12 and 36 hours. Convective vertical motion properties ... More
Induced Lorentz- and CPT-violating Chern-Simons term in QED: Fock-Schwinger proper time methodJan 16 2001Using the Fock-Schwinger proper time method, we calculate the induced Chern-Simons term arising from the Lorentz- and CPT-violating sector of quantum electrodynamics with a $b_\mu \bar{\psi}\gamma^\mu \gamma_5 \psi$ term. Our result to all orders in $b$ ... More
Three-Loop Effective Potential of O(N) $φ^4$ TheoryJul 26 1998Nov 23 1998The three-loop effective potential of the massless O(N) $\phi^4$ theory is calculated analytically using techniques of dimensional regularization. We see a complete agreement between our result and Jackiw's result obtained only up to two-loop order using ... More
Renormalization conditions and the effective potential of the massless phi^4 theoryApr 10 1998We point out that there is a missing portion in the two-loop effective potential of the massless O(N) phi^4 theory obtained by Jackiw in his classic paper, Phys. Rev. D 9, 1686 (1974).
Renormalization group improvement of the effective potential in massive $φ^4$ theoryMay 12 1999Using the method of renormalization group, we improve the two-loop effective potential of the massive $\phi^4$ theory to obtain the next-next-to-leading logarithm correction in the $\bar{MS}$ scheme. Our result well reproduces the next-next-to-leading ... More
Nonequilibrium occupation number and charge susceptibility of a resonance level close to a dissipative quantum phase transitionFeb 22 2010Based on the recent paper (Phys. Rev. Lett. 102, 216803, (2009)), we study the nonequilibrium occupation number and charge susceptibility of a resonance level close to a dissipative quantum phase transition of the Kosterlitz-Thouless (KT) type between ... More
Quantum criticality of the two-channel pseudogap Anderson model: Universal scaling in linear and non-linear conductanceJan 18 2015The quantum criticality of the two-lead two-channel pseudogap Anderson model is studied. Based on the non-crossing approximation, we calculate both the linear and nonlinear conductance of the model at finite temperatures with a voltage bias and a power-law ... More
Optimal Experimental Design for Constrained Inverse ProblemsAug 16 2017In this paper, we address the challenging problem of optimal experimental design (OED) of constrained inverse problems. We consider two OED formulations that allow reducing the experimental costs by minimizing the number of measurements. The first formulation ... More
Tunable Fano-Kondo resonance in side-coupled double quantum dot systemApr 28 2010We study the interference between the Fano and Kondo effects in a side-coupled double-quantum- dot system where one of the quantum dots couples to conduction electron bath while the other dot only side-couples to the first dot via antiferromagnetic (AF) ... More
RG-Improved Three-Loop Effective Potential of the Massive $φ^4$ theoryNov 24 1999Feb 01 2002The renormalization group method is applied to the three-loop effective potential of the massive $\phi^4$ theory in the $\bar{\rm MS}$ scheme in order to obtain the next-next-next-to-leading logarithm resummation. For this, we exploit four-loop parts ... More
Non-centrosymmetric superconductors on honeycomb latticeMar 15 2018We study non-centrosymmetric topological superconductivity in correlated doped quantum spin-Hall insulators (QSHI) on honeycomb lattice without inversion symmetry where the intrinsic (Kane-Mele) and Rashba spin-orbit couplings can in general exist. We ... More
Kondo effect in a side-coupled double-quantum-dot system embedded in a mesoscopic ringAug 05 2009Sep 04 2009We study the finite size effect of the Kondo screening cloud in a double-quantum-dot setup via a large-N slave-boson mean-field theory. In this setup, one of the dots is embedded in a close metallic ring with a finite size $L$ and the other dot is side-coupled ... More
Two-stage Kondo effect in side-coupled quantum dots: Renormalized perturbative scaling theory and Numerical Renormalization Group analysisJul 24 2007We study numerically and analytically the dynamical (AC) conductance through a two-dot system, where only one of the dots is coupled to the leads but it is also side-coupled to the other dot through an antiferromagnetic exchange (RKKY) interaction. In ... More
A General Framework for Multi-focal Image Classification and Authentication: Application to Microscope Pollen ImagesMar 19 2015In this article, we propose a general framework for multi-focal image classification and authentication, the methodology being demonstrated on microscope pollen images. The framework is meant to be generic and based on a brute force-like approach aimed ... More
Distributed Algorithms for Finding Local Clusters Using Heat Kernel PagerankJul 31 2015Dec 02 2016A distributed algorithm performs local computations on pieces of input and communicates the results through given communication links. When processing a massive graph in a distributed algorithm, local outputs must be configured as a solution to a graph ... More
Three-Dimensional Two-Pion Emission Source at SPS: Extraction of Source Breakup Time and Emission DurationJul 30 2008A model-independent, three-dimensional source function for pion pairs has been extracted from Pb+Pb collisions at $\sqrt s_{NN}=17.3$ AGeV. The extracted sourc e exhibits long-range non-Gaussian tails in the directions of the pion-pair net transverse-momentum ... More
A Solution of the Hubbard ModelNov 21 2013Apr 28 2014We report a ground-state solution for the two-dimensional fermionic Hubbard model, which is obtained via a numerical variational method. The two ingredients in this approach are tensor network states and the time-evolving block decimation. We easily handle ... More
Many Particle Hamiltonian for the Fractional Quantum Hall EffectFeb 19 1993A many-particle Hamiltonian is proposed in order to explain the fractional quantum Hall effect (FQHE) for fractional filling factors $\nu < 1$. The solutions of the corresponding Hartree-Fock equations make it possible to discuss the FQHE from the point ... More
Space-charge compensation experiments at IOTA ringFeb 05 2015Space-charge effects belong to the category of the most long-standing issues in beam physics, and even today, after several decades of very active exploration and development of counter-measures, they still pose the most profound limitations on performance ... More
Simultaneous inference of Jefimenko's and Maxwell's equations from retardationDec 26 2008Feb 23 2009Assuming the idea of retardation as an underlying axiom, we investigate how Jefimenko's and Maxwell's equations can be inferred. In the inference, we begin with the retarded versions of Coulomb's and Biot-Savart's field expression as an incomplete, starting ... More
Lorentz and CPT Violating Chern-Simons Term in the Formulation of Functional IntegralApr 06 1999We show that in the functional integral formalism the (finite) coefficient of the induced, Lorentz- and CPT-violating Chern-Simons term, arising from the Lorentz- and CPT-violating fermion sector, is undetermined.
The Algebraic Structure of n-Punctured Ball TanglesJun 01 2005Jul 26 2005We consider a class of topological objects in the 3-sphere $S^3$ which will be called $n$-punctured ball tangles. Using the Kauffman bracket at $A=e^{i \pi/4}$, an invariant for a special type of $n$-punctured ball tangles is defined. The invariant $F^n$ ... More
A comment on W. Greiner's "Quantum Mechanics -- An Introduction"Jun 15 2003It is pointed out that in Greiner's book, ``Quantum Mechanics --An Introduction,'' there is a confusion between the wavelength spectral function and the (angular) frequency spectral function in the derivation of the Wien's displacement law.
Dynamical Complexity and $K$-Theory of $L^p$ Operator Crossed ProductsNov 28 2016Mar 29 2018We apply quantitative (or controlled) $K$-theory to prove that a certain $L^p$ assembly map is an isomorphism for $p\in[1,\infty)$ when an action of a countable discrete group $\Gamma$ on a compact Hausdorff space $X$ has finite dynamical complexity. ... More
AMIDAS-II: Upgrade of the AMIDAS Package and Website for Direct Dark Matter Detection Experiments and PhenomenologyMar 22 2014Nov 13 2014In this paper, we give a detailed user's guide to the AMIDAS (A Model-Independent Data Analysis System) package and website, which is developed for online simulations and data analyses for direct Dark Matter detection experiments and phenomenology. Recently, ... More
Effects of Residue Background Events in Direct Dark Matter Detection Experiments on the Estimation of the Spin-Independent WIMP-Nucleon CouplingMar 21 2011Aug 16 2011In our work on the development of a model-independent data analysis method for estimating the spin-independent (SI) scalar coupling of Weakly Interacting Massive Particles (WIMPs) on nucleons by using measured recoil energies from direct Dark Matter detection ... More
Uploading User-Defined Functions onto the AMIDAS WebsiteOct 11 2009The AMIDAS website has been established as an online interactive tool for running simulations and analyzing data in direct Dark Matter detection experiments. At the first phase of the website building, only some commonly used WIMP velocity distribution ... More
Background effects on reconstructed WIMP couplingsJan 28 2012In this talk, I presented effects of small, but non-negligible unrejected background events on the determinations of WIMP couplings/cross sections.
Analyzing Direct Dark Matter Detection Data by the AMIDAS WebsiteSep 01 2011In this talk I have presented the data analysis results of extracting properties of halo WIMPs: the mass and the (ratios between the) spin-independent and spin-dependent couplings/cross sections on nucleons by the AMIDAS website. Although non-standard ... More
Determining Ratios of WIMP-Nucleon Cross Sections from Direct Dark Matter Detection DataMar 02 2011Jul 04 2011Weakly Interacting Massive Particles (WIMPs) are one of the leading candidates for Dark Matter. So far the usual procedure for constraining the WIMP-nucleon cross sections in direct Dark Matter detection experiments have been to fit the predicted event ... More
Effects of Residue Background Events in Direct Dark Matter Detection Experiments on the Reconstruction of the Velocity Distribution Function of Halo WIMPsMar 27 2010Jun 27 2010In our earlier work on the development of a model-independent data analysis method for reconstructing the (moments of the) time-averaged one-dimensional velocity distribution function of Weakly Interacting Massive Particles (WIMPs) by using measured recoil ... More
A variable-free dynamic semanticsMay 17 2002I propose a variable-free treatment of dynamic semantics. By "dynamic semantics" I mean analyses of donkey sentences ("Every farmer who owns a donkey beats it") and other binding and anaphora phenomena in natural language where meanings of constituents ... More
Evaluation of Stopping Powers of Superheavy Ions with $\it{Z}$ up to 124 in Al and UFeb 01 2015Electronic and nuclear stopping powers of superheavy ions with $\it{Z}$ up to 124 and $\it{A}$=300 in Al and U were estimated in the energy range of 0.01-0.20 MeV/u. The corresponding stopping powers were estimated using stopping powers of ions with 6$\leq$$\it{Z}$$\leq$92 ... More
On Global Flipped SU(5) GUTs in F-theoryAug 15 2010Mar 27 2011We construct an SU(4) spectral divisor and its factorization of types (3,1) and (2,2) based on the construction proposed in [1]. We calculate the chiral spectra of flipped SU(5) GUTs by using the spectral divisor construction. The results agree with those ... More
The Unified Theory of PhysicsJan 16 2002Sep 24 2012The unified theory of physics unifies various phenomena in our observable universe and other universes. The unified theory is based on the zero-energy universe and the space-object structures. Different universes in different developmental stages are ... More
Classical inflaton field induced creation of superheavy dark matterSep 23 1998We calculate analytically and numerically the production of superheavy dark matter (X) when it is coupled to the inflaton field \phi within the context of a slow-roll m_\phi^2 \phi^2/2 inflationary model with coupling g^2 X^2 \phi^2/2. We find that X ... More
Superheavy Dark MatterAug 14 1998If there exist fields of mass of the order of $10^{13}$ GeV and large field inflation occurs, their interaction with classical gravitation will generate enough particles to give the universe critical density today regardless of their nongravitational ... More
A Revised Proof of the Existence of Negative Energy Density in Quantum Field TheoryNov 27 1996Jan 07 1997Negative energy density is unavoidable in the quantum theory of field. We give a revised proof of the existence of negative energy density unambiguously for a massless scalar field.
A weak form of beyond endoscopic decomposition for the stable trace formula of odd orthogonal groupsAug 11 2016Jul 30 2017We show that the cuspidal component of the stable trace formula of a special odd orthogonal group over a number field, satisfies a weak form of beyond endoscopic decomposition. We also study the $r$-stable trace formula, when $r$ is the standard or the ... More
On the $q$-Laplace transform in the non-extensive statistical physicsJan 23 2013In this paper, q-Laplace transforms related to the non-extensive thermodynamics are investigated by using the algebraic operation of the non-extensive calculus. The deformed simple harmonic problem is discussed by using the q-Laplace transform.
Detecting a Higgs Pseudoscalar with a Z Boson Produced in Bottom Quark FusionNov 24 2004Jun 08 2005We investigate the prospects of detecting a Higgs pseudoscalar ($A^0$) in association with a $Z$ gauge boson produced from bottom quark fusion ($b\bar{b} \to ZA^0$) at the CERN Large Hadron Collider (LHC). A general two Higgs doublet model and the minimal ... More
Massive Neutrinos and Galaxy FormationDec 19 1994We report the most recent results from high-resolution numerical simulations of structure formation in two flat cold+hot dark matter models with neutrino mass densities $\onu=0.2$ and 0.3. We find that structure forms too late in all CDM+HDM models with ... More
Pomeron and AdS/CFT Correspondence for QCDFeb 10 2001The Maldacena conjecture that QCD is holographically dual to gravity in extra dimensions is briefly reviewed. On the basis of this duality conjecture, the complete glueball spectrum is computed which bares a striking resemblance to the known $QCD_4$ spectrum ... More
Ideal Gas of Strings and QCD at Hadronic ScalesJan 08 1993By using lessons learned from modern string studies, we show how interesting non-perturbative features of QCD can be learned from future heavy ion collisions even if the deconfinement density is not reached.
Galois representations attached to automorphic forms on GL_2 over CM fieldsSep 25 2011Sep 03 2013In this paper we generalize the work of Harris-Soudry-Taylor and construct the compatible systems of two-dimensional Galois representations attached to cuspidal automorphic representations of cohomological type on GL_2 over a CM field with a suitable ... More
Partial Data for the Neumann-Dirichlet Magnetic Schrödinger Inverse ProblemFeb 18 2014We show that an electric potential and magnetic field can be uniquely determined by partial boundary measurements of the Neumann-to-Dirichlet map of the associated magnetic Schr\"{o}dinger operator. This improves upon previous results of the author by ... More