Tootfinder

from my link log —
Taichi: high-performance parallel programming in Python.
https://www.taichi-lang.org/
saved 2025-02-15 https://dot…

Dynamical Analysis of the HD 169142 Planet-Forming Disk: Twelve Years of High-Contrast Polarimetry
Miles Lucas, Michael Bottom, Ruobing Dong, Myriam Benisty, Mario Flock, Maria Vincent, Jonathan Williams, Kyohoon Ahn, Thayne Currie, Vincent Deo, Olivier Guyon, Tomoyuki Kudo, Lucinda Lilley, Julien Lozi, Maxwell Millar-Blanchaer, Barnaby Norris, Sebasti\'an P\'erez, Boris Safonov, Peter Tuthill, Taichi Uyama, S\'ebastien Vievard, Manxuan Zhang

Dynamical Analysis of the HD 169142 Planet-Forming Disk: Twelve Years of High-Contrast Polarimetry
We present a dynamical analysis of the HD 169142 planet-forming disk based on high-contrast polarimetric imaging over a twelve-year observational period, offering insights into its disk evolution and planet-disk interactions. This study explores the evolution of scattered-light features and their relationship with millimeter continuum emission. Archival visible-to-near-infrared scattered-light observations from NACO, SPHERE, and GPI combined with new observations from SCExAO reveal persistent n…

Three-Dimensional Polarimetric Structure of Jets from Radio Galaxy MRC 0600-399 in Abell 3376
Haruka Sakemi, James O. Chibueze, William D. Cotton, Viral Parekh, Takumi Ohmura, Mami Machida, Taichi Igarashi, Takuya Akahori, Hiroki Akamatsu, Hiroyuki Nakanishi, Tsutomu T. Takeuchi
https://arxiv.org/abs/2508.13454

Three-Dimensional Polarimetric Structure of Jets from Radio Galaxy MRC 0600-399 in Abell 3376
MRC 0600-399, in the merging galaxy cluster Abell 3376, is one of the unique Head-Tail radio galaxies having abruptly bending structures, the origin of which is still under discussion. A previous study suggested that the interaction between the jets and the magnetic fields on the cold front has produced such an outstanding feature; however, it is still not known how the jet propagates the long distance keeping the sharp shape. In this study, we performed a polarization analysis of MRC 0600-399 …

Data-driven Methods of Extracting Text Structure and Information Transfer
Shinichi Honna, Taichi Murayama, Akira Matsui
https://arxiv.org/abs/2509.12999 https://

Data-driven Methods of Extracting Text Structure and Information Transfer
The Anna Karenina Principle (AKP) holds that success requires satisfying a small set of essential conditions, whereas failure takes diverse forms. We test AKP, its reverse, and two further patterns described as ordered and noisy across novels, online encyclopedias, research papers, and movies. Texts are represented as sequences of functional blocks, and convergence is assessed in transition order and position. Results show that structural principles vary by medium: novels follow reverse AKP in …

SCDTour: Embedding Axis Ordering and Merging for Interpretable Semantic Change Detection
Taichi Aida, Danushka Bollegala
https://arxiv.org/abs/2509.11818 https://

SCDTour: Embedding Axis Ordering and Merging for Interpretable Semantic Change Detection
In Semantic Change Detection (SCD), it is a common problem to obtain embeddings that are both interpretable and high-performing. However, improving interpretability often leads to a loss in the SCD performance, and vice versa. To address this problem, we propose SCDTour, a method that orders and merges interpretable axes to alleviate the performance degradation of SCD. SCDTour considers both (a) semantic similarity between axes in the embedding space, as well as (b) the degree to which each axi…

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446 4633
Taichi Uyama, Masayuki Kuzuhara, Charles Beichman, Teruyuki Hirano, Takayuki Kotani, Qier An, Timothy D. Brandt, Markus Janson, Dimitri Mawet, Mayuko Mori, Bun'Ei Sato, Denitza Stoeva, Motohide Tamura, Masataka Aizawa, Bryson Cale, Thomas Henning, Hiroyuki Tako Ishikawa, Norio Narita, Masahiro Ogihara, Aniket Sanghi, T…

Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633
We report the discovery of a new directly-imaged brown dwarf companion with Keck/NIRC2+pyWFS around a nearby mid-type M~dwarf LSPM~J1446+4633 (hereafter J1446). The $L'$-band contrast ($4.5\times10^{-3}$) is consistent with a $\sim20-60\ M_{\rm Jup}$ object at 1--10~Gyr and our two-epoch NIRC2 data suggest a $\sim30\%$ ($\sim3.1σ)$ variability in its $L'$-band flux. We incorporated Gaia DR3 non-single-star catalog into the orbital fitting by combining the Subaru/IRD RV monitoring results, NIRC…

Crosslisted article(s) found for astro-ph.EP. https://arxiv.org/list/astro-ph.EP/new
[1/1]:
- Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of...
Taichi Uyama, et al.

Replaced article(s) found for cond-mat.mtrl-sci. https://arxiv.org/list/cond-mat.mtrl-sci/new
[2/2]:
- aLLoyM: A large language model for alloy phase diagram prediction
Yuna Oikawa, Guillaume Deffrennes, Taichi Abe, Ryo Tamura, Koji Tsuda

Prevention of Yb adsorption by paraffin coating
Kanta Asakawa, Taichi Kobayashi, Masami Yasuda, Takao Aoki, Atsushi Hatakeyama
https://arxiv.org/abs/2509.07364 https://

Global Patterns of Knowledge: Language, Genre, and the Geography of Knowledge
Akira Matsui, Fujio Toriumi, Mitsuo Yoshida, Taichi Murayama, Shiori Hironaka
https://arxiv.org/abs/2507.22271

Global Patterns of Knowledge: Language, Genre, and the Geography of Knowledge
Online platforms, particularly Wikipedia, have become critical infrastructures for providing diverse linguistic and cultural contexts. This human-curated knowledge now forms the foundation for modern AI. However, we have not yet fully explored how knowledge production capability vary across languages and domains. Here, we address this gap by applying economic complexity analysis to understand the editing history of Wikipedia platforms. This approach allows us to infer the latent mode of ``knowl…

Replaced article(s) found for eess.AS. https://arxiv.org/list/eess.AS/new
[1/1]:
- Language-based Audio Moment Retrieval
Hokuto Munakata, Taichi Nishimura, Shota Nakada, Tatsuya Komatsu

Measurements, simulations, and models of the point-spread function of electron-beam lithography
Nikolaj B. Hougs, Kristian S. Knudsen, Marcus Albrechtsen, Taichi Suhara, Christian A. Rosiek, S{\o}ren Stobbe
https://arxiv.org/abs/2506.21236

Measurements, simulations, and models of the point-spread function of electron-beam lithography
When a sample is exposed using electron-beam lithography, the electrons scatter deep and far in the substrate, resulting in unwanted deposition of dose at both the nano- and the microscale. This proximity effect can be mitigated by proximity effect correction provided that accurate and validated models of the point-spread function of the electron scattering are available. Most works so far considered a double-Gaussian model of the electron point-spread function, which is very inaccurate for mod…

aLLoyM: A large language model for alloy phase diagram prediction
Yuna Oikawa, Guillaume Deffrennes, Taichi Abe, Ryo Tamura, Koji Tsuda
https://arxiv.org/abs/2507.22558 https://…

aLLoyM: A large language model for alloy phase diagram prediction
Large Language Models (LLMs) are general-purpose tools with wide-ranging applications, including in materials science. In this work, we introduce aLLoyM, a fine-tuned LLM specifically trained on alloy compositions, temperatures, and their corresponding phase information. To develop aLLoyM, we curated question-and-answer (Q&A) pairs for binary and ternary phase diagrams using the open-source Computational Phase Diagram Database (CPDDB) and assessments based on CALPHAD (CALculation of PHAse Diagr…

Arcsecond-Scale X-ray Imaging and Spectroscopy of SS 433 with Chandra HETG
Yusuke Sakai, Shinya Yamada, Haruka Sakemi, Mami Machida, Taichi Igarashi, Ryota Hayakawa, Miho Tan, Taisei Furuyama
https://arxiv.org/abs/2507.19042

Arcsecond-Scale X-ray Imaging and Spectroscopy of SS 433 with Chandra HETG
We present a spatial and spectral analysis of arcsecond-scale X-ray emission in SS433 using zeroth-order data from Chandra High-Energy Transmission Grating (HETG) observations. The analysis is based on 24 observations acquired between 1999 and 2024, comprising a total exposure of $\sim$850 ks and covering a wide range of orbital and precessional phases. Among these, the $\sim$140 ks observation from 2014 was analyzed in detail for this study. This data provides the best statistics and was taken…

Unveiling the Atmosphere of HR 7672 B from the Near-Infrared High-Resolution Spectrum Using REACH/Subaru
Yui Kasagi, Yui Kawashima, Hajime Kawahara, Takayuki Kotani, Kento Masuda, Kyohoon Ahn, Olivier Guyon, Teruyuki Hirano, Nemanja Jovanovic, Masayuki Kuzuhara, Julien Lozi, Motohide Tamura, Taichi Uyama, Sebastien Vievard, Kenta Yoneta
https://

Unveiling the Atmosphere of HR 7672 B from the Near-Infrared High-Resolution Spectrum Using REACH/Subaru
Characterizing the atmospheres of exoplanets and brown dwarfs is crucial for understanding their atmospheric physics and chemistry, searching for biosignatures, and investigating their formation histories. Recent advances in observational techniques, combining adaptive optics with high-resolution spectrographs, have enabled detailed spectroscopic analysis for directly imaged faint companions. In this paper, we report an atmospheric retrieval on the L-type brown dwarf HR 7672 B using a near-infr…