Title	Processing with networks and group selection
Author	Zajac Jaroslav
Citation	Vol. 6  No. 2  pp. 132~141
Keywords	hierarchy, organization and learning, random walk

Title	A Method for Retrieving and Building Structure of NLP Knowledge
Author	Elmarhmoy Ghada, El-Sayed Atlam, Masao Fuketa, Kazuhiro Morita, Jun-ichi Aoe
Citation	Vol. 6  No. 4  pp. 42-47
Keywords	Natural Language Processing, trie structure, Hierarchy.

Title	The Communication Method of Distance Education System and Sound Control Characteristics
Author	Manabu Ishihara
Citation	Vol. 6  No. 7  pp. 36-42
Keywords	Auditory sense, Internet, Classroom design, Distance education, Multipoint communication, AHP(Analytic Hierarchy Process), Sound pressure, Time-difference

Title	Optimal Level of Hierarchy for Multicast in IP Networks
Author	Milan Berka
Citation	Vol. 6  No. 8  pp. 31-34
Keywords	Optimalization, multicast, RTP, RTPC, hierarchy