The two well known learning algorithms of recurrent neural networks are the back-propagation (Rumelhart & el al., Werbos) and the forward propagation (Williamsand Zipser). The main drawback of back-propagation is its off-line backward path in time for error cumulation. This violates the online requirement in many practical applications. Although the forward propagation algorithmcan be used in an online manner, the annoying drawback is the heavy computation load required to update the high dimensional sensitivity matrix(0(fir) operations for each time step). Therefore, to develop a fast forward algorithm is a challenging task.

The two well known learning algorithms of recurrent neural networks are the back-propagation (Rumelhart & el al., Werbos) and the forward propagation (Williams and Zipser). The main drawback of back-propagation is its off-line backward path in time for error cumulation. This violates the online requirement in many practical applications. Although the forward propagation algorithm can be used in an online manner, the annoying drawback is the heavy computation load required to update the high dimensional sensitivity matrix (0( fir) operations for each time step). Therefore, to develop a fast forward algorithm is a challenging task.

As a communication scholar, I am This latest computer revolution well aware that many traditionalists has taken shape only within the view the respective disciplines of past five years. My recently completed These two revolutions have been master's thesis argues against this operating independently with limited view. Many concepts from the field success, instead of together with The workshops on Artificial Intelligence of communication have been used by potentially phenomenal success. The and Statistics have broadened the flow artificial intelligence researchers and multimedia revolution has successfully of information between the two fields scholars in the development of AI. broken into the marketplace on and encouraged interdisciplinary work. The central argument of my perspective all levels, but lacks the key component General Chair: R.W. Oldford (U. is that artificial intelligence is (symbolic reasoning) needed for Waterloo); man Program Chair: P. Cheese Sponsers: Sot. for A.I. and potential to provide the current multimedia By transcending traditional Stats., Int'l Ass. for Stat.

An effective to develop an abstract UI model which solution to this problem must have three encompasses the essence of those systems.

July Conference Highlights m An AI Art Exhibition will showcase robot weighing in at 300 lbs., from the use of AI in serious works SRI; Bert and Ernie, midget-sized Again this year, AAAI is staging the of art. AIon-Line, five audience-interactive Technologies, untethered and battery with the National Conference on Artificial AI user panels, will offer practical powered, from NASA-JSC; William, a Intelligence, with 19 deployed learning on key business and feel-its-way robot from MIT and JPL; applications selected for presentation organization issues, based on case Flash, a Denning mobile platform from entries from around the world. A series of invited speakers and guidance from MITRE; Flash dimension to the conference, panels will complement the refereed Zorton, a walking machine designed promising give-and-take discussions papers and introduce areas of to compete in the robotic decathlon, about AI in operation. AI research that have unusual from Ecole Polytechnique of Montreal; AAAI-92 offers a series of technical interest and application. The of Southern California/Information The AAAI Robot Rules capture the National Conference is the year's Sciences Institute, and Peter spirit of the competition, indicating, largest meeting ground for those Szolovits, Associate Professor of Computer "It will not be slick, polished...there interested in AI, from scientific, academic, Science at the Massachusetts will be a certain amount of chaos, and business communities. This year's program is particularly There is a serious purpose, diverse, with concentration on research AAAI To Include New Dean noted, "to bring together areas results that bridge the gaps between AI Robotics Competition of AI including those working in perception, the different AI technologies and the AAAI will have its first AI Robotics Highlights, including AAAI-92 National Conference in San facilitate this and to make 34 focused technical sessions, with Jose, California July 12-16, 1992.

On Monday, 15 July 1991, prior to the Ninth National Conference on Artificial Intelligence (AAAI-91) in Anaheim, California, over 50 scientists and engineers attended the AAAI-91 Workshop on Intelligent Multimedia Interfaces. The purpose of the workshop was threefold: (1) bring together researchers and practitioners to report on current advances in intelligent multimedia interface systems and their underlying theories, (2) foster scientific interchange among these individuals, and (3) evaluate current efforts and make recommendations for future investigations.

Advocates and critics of AI have long engaged in a debate that has generated a great deal of heat but little light. Whatever the merits of specific contributions to this ongoing debate, the fact that it continues points to the need for a reflective examination of the foundations of AI by its active practitioners. Following the lead of Earl MacCormac, we hope to advance such a reflective examination by considering questions of metaphor in science and the computational metaphor in AI. Specifically, we address three issues: the role of metaphor in science and AI, an examination of the computational metaphor, and an introduction to the possibility and potential value of using alternative metaphors as a foundation for AI theory.

Truth maintenance is a collection of techniques for doing belief revision. A truth maintenance system's task is to maintain a set of beliefs in such a way that they are not known to be contradictory and no belief is kept without a reason. Truth maintenance systems were introduced in the late seventies by Jon Doyle and in the last five years there has been an explosion of interest in this kind of systems. In this paper we present an annotated bibliography to the literature of truth maintenance systems, grouping the works referenced according to several classifications.

The Full-Sized Knowledge-Based Systems Research Workshop was held May 7-8, 1990 in Washington, D.C., as part of the AI Systems in Government Conference sponsored by IEEE Computer Society, Mitre Corporation and George Washington University in cooperation with AAAI. The goal of the workshop was to convene an international group of researchers and practitioners to share insights into the problems of building and deploying Full-Sized Knowledge Based Systems (FSKBSs).

Based on the experience in manufacturing production scheduling problems which the AI community has amassed over the last ten years, a workshop was held to provide a forum for discussion of the issues encountered in the design of AI-based scheduling systems. Several topics were addressed including : the relative virtues of expert system, deep method, and interactive approaches, the balance between predictive and reactive components in a scheduling system, the maintenance of convenient scheduling descriptions, the application of the ideas of chaos theory to scheduling, the state of the art in schedulers which learn, and the practicality and desirability of a set of benchmark scheduling problems. This article expands on these issues, abstracts the papers which were presented, and summarizes the lengthy discussions that took place.