Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Kim, Changhoan"'
Autor:
Perrone, Michael P., Khan, Haidar, Kim, Changhoan, Kyrillidis, Anastasios, Quinn, Jerry, Salapura, Valentina
This paper presents a methodology for selecting the mini-batch size that minimizes Stochastic Gradient Descent (SGD) learning time for single and multiple learner problems. By decoupling algorithmic analysis issues from hardware and software implemen
Externí odkaz:
http://arxiv.org/abs/1911.06459
Autor:
Kim, Changhoan
Thesis (Ph. D.)--Columbia University, 2004.
Bracketed terms in title represented by symbols; I and K in title are italicized. Department: Physics. Includes bibliographical references (leaves 83-86). Proquest Digital Dissertations Online ; Also a
Bracketed terms in title represented by symbols; I and K in title are italicized. Department: Physics. Includes bibliographical references (leaves 83-86). Proquest Digital Dissertations Online ; Also a
Autor:
Kim, Changhoan, Christ, Norman H.
Publikováno v:
PoS LAT2009:255,2009
The use of G-parity boundary conditions to compute Delta I = 1/2, K to pi pi decays is reviewed and a method to consistently treat both the pions and kaon in full QCD proposed. This approach creates a physical, final-state, pion momentum using a 3 fm
Externí odkaz:
http://arxiv.org/abs/0912.2936
Autor:
Kim, Changhoan
Publikováno v:
Phys.Rev.D80:014505,2009
It is shown that the low energy coefficients of the next-to-leading order (NLO) chiral perturbation theory needed to determine $\Delta I=1/2$, $K\to\pi\pi$ decay amplitudes can be fixed by calculating $K\pi\to\pi$ amplitudes on lattice. Unlike using
Externí odkaz:
http://arxiv.org/abs/0808.1946
Autor:
Kim, Changhoan, Sachrajda, Christopher
Publikováno v:
PoS LAT2007:357,2007
It is proposed to compute matrix elements for the (unphysical) $K^0\pi^-\to \pi^-$ transition to determine the next-to-leading order low energy constants of the weak chiral Lagrangian. This allows us to evaluate $K\to(\pi\pi)_{I=0}$ decay amplitudes
Externí odkaz:
http://arxiv.org/abs/0710.2519
Publikováno v:
PoS LAT2005:359,2006
We determine the quantization condition for the energy levels of two interacting particles in a finite box in a ``moving frame'', i.e. one in which the total momentum of pions is non-zero. This condition is valid up to corrections which fall exponent
Externí odkaz:
http://arxiv.org/abs/hep-lat/0510022
Publikováno v:
Phys.Rev. D72 (2005) 114506
We study the effects of finite volume on the two-particle decay rate of an unstable state with non-zero momentum. First Luscher's field-theoretic relation between the infinite volume scattering phase shifts and the quantized energy levels of a finite
Externí odkaz:
http://arxiv.org/abs/hep-lat/0507009
Autor:
Kim, Changhoan
To make the $\pi\pi$ state with non-zero relative momentum as the leading exponential, we impose anti-periodic boundary condition on the pion, which is implemented by imposing G-parity or H-parity on the quark fields at the boundary. With this, we ca
Externí odkaz:
http://arxiv.org/abs/hep-lat/0311003
Autor:
Kim, Changhoan, Christ, Norman H.
In order to directly compute physical two-pion K-decay amplitudes using lattice methods we must prepare a two-pion state with non-zero relative momentum. Building upon a proposal of Lellouch and L\"uscher, we describe a finite-volume method to realiz
Externí odkaz:
http://arxiv.org/abs/hep-lat/0210003
Autor:
Kim, Changhoan
Publikováno v:
In Nuclear Physics B (Proceedings Supplements) 2005 140:381-383