We describe in this paper a new method for extracting knowledge on Hierarchical Task-Network (HTN) planning problems for speeding up the search. This knowledge is gathered by propagating properties through an AND/OR tree that represents disjunctively all possible decompositions of an HTN planning problem. We show how to use this knowledge during the search process of our GraphHTN planner, to sp...

Any serious empirical study of factor substitutability has to allow the data to display complementarity as well as substitutability. The standard approach reflecting this idea is a translog specification – this is also the approach used by numerous studies analyzing the relative capital-skill complementarity hypothesis formulated by GRILICHES (1969). According to this hypothesis, the degree of ...

This study reports the results of farmers’ production via irrigation resources utilization and efficiency parameters technical allocative by way sustainable environmental economics. The hypothesis is that factors affect in scheme as Data from cross section panel data were used then productivity measurement function are outlined two scenarios: first, report such output elasticity determine ineff...

A production approach based on the translog cost function is used to analyze import demand for wheat differentiated by class and country of origin in the Japanese wheat flour milling industry. Results indicate that US wheat faces strong competition in the Japanese wheat market, but its multiple classes and end-use characteristics enable the US to preserve the largest market share in Japan. © 20...

The paper reports about a case study in algebraic specification. It describes TransLog, a transformation tool for pure Prolog programs. TransLog supports the interactive transformation of (a part of) a program. Six transformation steps are supported: unfolding, folding, goal definition, argument permutation (an instance of goal replacement), goal switching and definition elimination. As much as...