TDMA-based channel access scheme for V2I communication system using smart antenna. - Sung-Yeop Pyun; Helena Widiarti; Yong Jin Kwon; Dong-Ho Cho; Jong-Wuk Son (VNC, 2010)

Interference Mitigation Based on Femtocells Grouping in Low Duty Operation. - Helena Widiarti; Sung-Yeop Pyun; Dong-Ho Cho (VTC Fall, 2010)

Group-Based Channel Access Scheme for a V2I Communication System using Smart Antenna. - Sung-Yeop Pyun; Helena Widiarti; Yong Jin Kwon; Jong-Wuk Son; Dong-Ho Cho (IEEE Commun. Lett., 2011)

A Framework for Multi Institutional Collaboration for Pneumonia Screening by Means of Federated Learning. - Agung Alfiansyah; Helena Widiarti; Vincentius Reynaldo; Wilsen Widjaja; Laurent Bobelin (CECNet, 2023)