Special Issue on Knowledge Based Software Engineering ===================================================== . FOREWORD ....................................................... 1101 Haruki UENO PAPERS ====== [Methodologies] . Learning Levels in Intelligent Tutoring Systems ................ 1103 Vadim L.STEFANUK . Concepts and Methodologies for Knowledge-Based Program Understanding --The ALPUS's Approach-- ....................................... 1108 Haruki UENO . Reconstructing Data Flow Diagrams from Structure Charts Based on the Input and Output Relationship .................................. 1118 Shuichiro YAMAMOTO [Models] . A Computer Supported System of Meetings Using a Model of Inter-Personal Communication ................................... 1127 Tomofumi UETAKE and Morio NAGATA . A Constructing Method of Functional Model by Integrated Learning from Examples of Software Modification ......................... 1133 Hiroyuki YAMADA, Tetsuo KOBASHI, and Tsunehiro AIBARA [Snpport Systems] . A Software Project Management System Using Object Oriented Database --Integration of Process Management System and Quality Management System-- ....................................................... 1142 Seiichi KOMIYA and Atsuo HAZEYAMA . A Visual Environment Organizing the Class Hierarchy for Object-Oriented Programming .................................... 1150 Takashi HAGINIWA and Morio NAGATA [Applications] . A Requirement Description Approach in Natural Language Based on Communication Service Knowledge ................................ 1156 Yoshizumi KOBAYASHI, Tadashi OHTA, and Nobuyoshi TERASHIMA . Case Histories on Knowledge-Based Design Systems for LSI and Software ....................................................... 1164 Masanobu WATANABE, Toru YAMANOUCHI, Masahiko IWAMOTO, and Satoru FUJITA Regular Section =============== PAPERS ====== [Fault Tolerant Computing] . Linear Time Algorithms for Fault Tolerant Routing in Hypercubes and Star Graphs .................................................... 1171 Qian-Ping GU and Shietung PENG [Speech Processing and Acoustics] . Multisegment Multiple VQ Codebooks-Based Speaker Independent Isolated-Word Recognition Using Unbiased Mel Cepstrum .......... 1178 Liang ZHOU and Satoshi IMAI . Harmonics Estimation Based on Instantaneous Frequency and Its Application to Pitch Determination of Speech ................... 1188 Toshihiko ABE, Takao KOBAYASHI, and Satoshi IMAI [Image Processing, Computer Graphics and Pattern Recognition] . Detection and Tracking of Facial Features by Using Edge Pixel Counting and Deformable Circular Template Matching ............. 1195 Liyanage C.DE SILVA, Kiyoharu AIZAWA, and Mitsutoshi HATORI [Artificial Intelligence and Cognitive Science] . Conceptual Graph Programs and Their Declarative Semantics ...... 1208 Bikash Chandra GHOSH and Vilas WUWONGSE LETTERS ======= [Databases] . A Similar Key Search File Based on Extendible Hashing .......... 1218 Shinji KAWADE and Eiichi TANAKA [Image Processing, Computer Graphics and Pattern Recognition] . Image Decomposition by Answer-in-Weights Neural Network ........ 1221 Iren VALOVA, Keisuke KAMEYAMA, and Yukio KOSUGI . ABSTRACTS (IEICE Trans., Vol.J78-D-I, J78-D-II, No.9 in Japanese) ....................................................... 1225