40 citations · 359 across the 20 of their papers we have counts for
20 papers
TRINITY: a three-dimensional time-dependent radiative transfer code for in-vivo near-infrared imaging
Hidenobu Yajima, Makito Abe, Masayuki Umemura +2
We develop a new three-dimensional time-dependent radiative transfer code, TRINITY (Time-dependent Radiative transfer In Near-Infrared TomographY), for in-vivo diffuse optical tomo…
Deep Learning of Diffuse Optical Tomography based on Time-Domain Radiative Transfer Equation
Yu-ichi Takamizu, Masayuki Umemura, Hidenobu Yajima +2
Near infrared diffuse optical tomography (DOT) provides an imaging modality for the oxygenation of tissue. In this paper, we propose a novel machine learning algorithm based on tim…
Gradient expansion formalism for nonlinear superhorizon perturbations
Yu-ichi Takamizu
We develop a theory of nonlinear cosmological perturbations on superhorizon scales where a characteristic length scale of perturbations is longer than the Hubble radius, in general…
Collisions of false vacuum bubbles in cylindrical symmetry
Yu-ichi Takamizu, David Chernoff
We explore the collision of two cylindrical bubbles in classical general relativity with a scalar field stress-energy tensor. Inside each bubble the field rests at a local minimum…
Application of beyond formalism -- Varying sound speed
Yu-ichi Takamizu
We focus on the evolution of curvature perturbation on superhorizon scales by adopting the spatial gradient expansion and show that the nonlinear theory, called the beyond -for…
Localized Features in Non-Gaussianity from Heavy Physics
Ryo Saito, Yu-ichi Takamizu
We discuss the possibility that we could obtain some hints of the heavy physics during inflation by analyzing local features of the primordial bispectrum. A heavy scalar field coul…