News-based Business Sentiment and its Properties as an Economic Index

no code implementations • 20 Oct 2021 • Kazuhiro Seki, Yusuke Ikuta, Yoichi Matsubayashi

To demonstrate the validity of the proposed approach, an extensive analysis is carried out on 12 years' worth of newspaper articles.

Outlier Detection

S-APIR: News-based Business Sentiment Index

no code implementations • 6 Mar 2020 • Kazuhiro Seki, Yusuke Ikuta

This paper describes our work on developing a new business sentiment index using daily newspaper articles.

Domain Adaptation

Thermodynamic properties of an $S=1/2$ ring-exchange model on the triangular lattice

1 code implementation • 24 Dec 2019 • Kazuhiro Seki, Seiji Yunoki

By using a numerically exact diagonalization technique and a block-extended version of the finite-temperature Lanczos method, we study thermodynamic properties of an $S=1/2$ Heisenberg model on the triangular lattice with an antiferromagnetic nearest-neighbor interaction $J$ and a four-spin ring-exchange interaction $J_{\rm c}$.

Strongly Correlated Electrons

Semantic Web Today: From Oil Rigs to Panama Papers

no code implementations • 5 Nov 2017 • Rivindu Perera, Parma Nand, Boris Bacic, Wen-Hsin Yang, Kazuhiro Seki, Radek Burget

This paper discusses eight different industries which currently reap the benefits of Semantic Web.

Developing ML-based Systems to Extract Medical Information from Japanese Medical History Summaries

no code implementations • WS 2013 • Shohei Higashiyama, Kazuhiro Seki, Kuniaki Uehara

Information Retrieval Named Entity Recognition (NER) +1