Tootfinder

A young woolly mammoth now known as Yuka
was frozen in the Siberian permafrost for about 40,000 years
before it was discovered by local tusk hunters in 2010.
The hunters soon handed it over to scientists,
who were excited to see its exquisite level of preservation,
with skin, muscle tissue, and even reddish hair intact.
Later research showed that,
while full cloning was impossible,
Yuka’s DNA was in such good condition that some cell nuclei co…

World’s oldest RNA extracted from Ice Age woolly mammoth
Sequencing an ancient creature’s RNA opens up a new window into extinct life.

Two Modes of Reflection: How Temporal, Spatial, and Social Distances Affect Reflective Writing in Family Caregiving
Shunpei Norihama, Yuka Iwane, Jo Takezawa, Simo Hosio, Mari Hirano, Naomi Yamashita, Koji Yatani
https://arxiv.org/abs/2510.05510

Two Modes of Reflection: How Temporal, Spatial, and Social Distances Affect Reflective Writing in Family Caregiving
Writing about personal experiences can improve well-being, but for family caregivers, fixed or user-initiated schedules often miss the right moments. Drawing on Construal Level Theory, we conducted a three-week field study with 47 caregivers using a chatbot that delivered daily reflective writing prompts and captured temporal, spatial, and social contexts. We collected 958 writing entries, resulting in 5,412 coded segments. Our Analysis revealed two reflective modes. Under proximal conditions, …

Linking numbers for periodic tangles
Yuka Kotorii, Ken'ichi Yoshida
https://arxiv.org/abs/2509.24568 https://arxiv.org/pdf/2509.24568

Linking numbers for periodic tangles
Periodic tangles are 1-dimensional submanifolds in the 3-space with translational symmetry. In this paper, we define the linking numbers for singly, doubly, and triply periodic tangles using appropriate motifs and show that they are well-defined and invariant under link-homotopy. Furthermore, we extend the notion to the higher order linking numbers for singly periodic tangles.

Chiral Analogues of Knit Stitches Designed Using Chiral Topology
Shunsuke Takano, Yusuke Kochi, Ken'ichi Yoshida, Elisabetta A. Matsumoto, Yuka Kotorii, Toru Asahi, Katsuya Inoue
https://arxiv.org/abs/2509.23604

Chiral Analogues of Knit Stitches Designed Using Chiral Topology
Fabrics are flexible thin structures made of entangled yarn or fibers, yet the topological bases of their mechanics remain poorly understood. For weft knitted fabrics, we describe how the entanglement of adjacent stitches contributes to the flexibility of the fabric. Interpreting heterogeneous stitch pairs as domain boundaries reveals that the step between pairs of neighboring stitches is responsible for direction-specific flexibility. In typical knitted fabrics, anisotropic flexibility can be …

Crosslisted article(s) found for math.FA. https://arxiv.org/list/math.FA/new
[1/1]:
- Why High-rank Neural Networks Generalize?: An Algebraic Framework with RKHSs
Yuka Hashimoto, Sho Sonoda, Isao Ishikawa, Masahiro Ikeda