Constructing "good" models for chemical carcinogenesis was identified in IJCAI-97 as providing a substantial challenge to "knowledge discovery" programs. Attent ion was drawn to a comparative exercise which called for predictions on the outcome of 30 rodent carcinogenicity bioassays. This the Predictive Toxicology Evaluation (or PTE) Challenge was seen to provide AI programs wi th an opportunit...

than 90% were interested in using farm management decision support software (Frasier et al., 1997). The GPFARM is an ARS decision support system for strategic (longsame survey also showed that 57% of 219 producer term) planning. This study evaluated its performance for comparing alternative dryland no-till cropping systems and established limits of respondents were interested in a farm manageme...

One of the most important aspects of current expert systems technology is the ability to make causal inferences about the impact or new evidence. When the domain knowledge and problem knowledge are uncertain and incomplete, Bayesian reasoning has proven to be an effective way or forming such inferences ]3,4,8j. While several reasoning schemes have been developed. based on Ba.yes Rule, there has...

Many r u l e s of fo rma l debate are w e l l documented, of common knowledge, and " l ooked -up " in p r e p a r a t i o n f o r planned deba t i ng . I n f o r m a l debates, on the o ther hand, are h i g h l y dynamic, are complex, and are spontaneously generated w i t h no p r i o r r u l e -book p r e p a r a t i o n . They t o o , however, are r u l e g o v e r n e d . In t h i s paper I ...

Sixty patients were treated for medial instability by advancementof the medial collateral ligament and posteromedial capsule as a single cuff, moving its tibial attachments both anteriorly and distally. Using a 0 to 4 + grading scale to quantitate medial instability, all patients had 2 + medial instability or more preop eratively while at follow-up thirty-six had 0, twenty-one, 1 + ; and three,...

The above c o n t e n t i o n . I f t r u e , g r e a t l y s h i f t s the emphasls w i t h i n the Process Transformat ion Phase from tha t of a general problem so lver s o l v i n g problems In a domain Independent way to modi fy ing a s o l u t i o n so t ha t it does not ma in ta in any i r r e l e v a n t p o r t i o n s of the complete model and which abs t rac t s the re levan t po r t ...

The transplantation immunogenicity of spontaneous C3H/He mammary carcinomas was studied by means of the surgery-challenge procedure during serial in vivo passages in syngeneic mice. Reciprocal cross-sensitization and challenge tests between late transplant genera tions and early transplant generations (from liquid N, storage) of the same tumors showed that factors respon sible for transplantati...

THISESSAY INTRODUCES the overall subject of the present issue of Library Trends and puts into a contemporary and historical context all the pieces which follow. The authors look at the current world of special collections, showing how it has evolved and how, in many ways, issues of the past are still with us. Libraries change, in all of their capacities and departments. Special collections and ...

The development of new methods and rep­ resentations for temporal decision-making requires a principled basis for characterizing and measuring the flexibility of decision strategies in the face of uncertainty. Our goal in this paper is to provide a framework not a theory for observing how decision policies behave in the face of informational perturbations, to gain clues as to how they might beh...

s e q u e n c e of t h r ee l e t t e r s , called a t r i l i t e ra l root . A p r o p o s e d "Matrix" method fo r the r e p r e s e n t a t i o n of the inf lect ional p a r a d i g m s of Arabic words is p r e s e n t e d . This r e p r e s e n t a t i o n r e s u l t s in a c lass i f ica t ion of Arabic w o r d s into a t ree s t r u c t u r e ( F i g ( l ) ) whose leaves r e p r e s e n...