International Heliophysical Year Activities in Japan. - Kiyohumi Yumoto (Data Sci. J., 2009)

Separation of stationary and non-stationary sources with a generalized eigenvalue problem. - Satoshi Hara 001; Yoshinobu Kawahara; Takashi Washio; Paul von Bünau; Terumasa Tokunaga; Kiyohumi Yumoto (Neural Networks, 2012)

A Wavelet Spectral Analysis Technique for Automatic Detection of Geomagnetic Sudden Commencements. - Ali Gamal Hafez; Essam Ghamry; Hideki Yayama; Kiyohumi Yumoto (IEEE Trans. Geosci. Remote. Sens., 2012)

Data and Information Activities of ICSWSE, Kyushu University, Japan. - Shuji Abe; Kiyohumi Yumoto; Akihiro Ikeda; Teiji Uozumi; George Maeda (Data Sci. J., 2013)

Un-decimated discrete wavelet transform based algorithm for extraction of geomagnetic storm sudden commencement onset of high resolution records. - Ali Gamal Hafez; Essam Ghamry; Hideki Yayama; Kiyohumi Yumoto (Comput. Geosci., 2013)