Forum Spectroscopy of Hydrogen, Helium, Neon and Mercury Low-Pressure Discharge and a Barcode-like Periodic Table Based on Energy Levels Yusei Maeda and Syuji Miyazaki Forma, Vol. 34 (No. 1), pp. 1-3, 2019 [Abstract] | [Full text] (PDF 479 KB) | [Attractive image Fig.1] Letter Stokes Flow around a Hypersphere in n-Dimensional Space and Its Visualization Takashi Yoshino Forma, Vol. 34 (No. 1), pp. 5-12, 2019 [Abstract] | [Full text] (PDF 786 KB) | [Attractive image Fig.5] Letter Trial on Low-Pass Filter Design for Bio-Signal Based on Nonlinear Analysis Toru Tanimura, Yusuke Jono, Takayuki Hirata, Yasuyuki Matsuura and Hiroki Takada Forma, Vol. 34 (No. 1), pp. 13-20, 2019 [Abstract] | [Full text] (PDF 475 KB) | [Attractive image Figs.8, 9]