Orthodox macro theories reflect a choice-theoretic orientation wherein aggregate variables act directly on one another. Hence, macro phenomena are reduced to the same order of simplicity as micro phenomena. In contrast, this paper explores how macro theory might be pursued when it is recognized that macro phenomena are of a higher order of complexity than micro phenomena. Rather than reducing m...

To evaluate the clinical usefulness of measuring transthoracic electrical impedance in patients with pulmonary edema, we studied 27 normal subjects and 33 patients. In normal subjects, impedance increased when body position changed from supine to standing (p less than 0.01) and when lung volume increased from residual volume to total lung capacity (p less than 0.01). Impedance values vari7 omeg...

This document describes Macro-FF, an adaptive planning system developed on top of FF version 2.3. The original FF is a fully automatic planner that uses a heuristic search approach. In addition, Macro-FF can automatically learn and use macro-actions with the goal of reducing the number of expanded nodes in the search. Macro-FF also includes implementation enhancements for reducing space and CPU...

This report describes the results of a set of experiments conducted with AIMS (Assisted Indexing at Mississippi State), a system that aids human document analysts in the assignment of indexes to physical chemistry journal articles. We defined four different experiments using four different combinations of portions of an article (such as the title and the abstract) to determine which portions of...

Many of the findings regarding economic voting derive from the micro-level analyses of survey data, in which respondents’ survey evaluations of the economy are shown to predict the vote. This paper investigates the causal nature of this relationship and argues that cross-sectional consistency between economic evaluations and vote choice is mainly if not entirely due to vote choice influencing t...

The problem of indexing path queries in semistructured/XML databases has received considerable attention recently, and several proposals have advocated the use of structure indexes as supporting data structures for this problem. In this paper, we investigate efficient update algorithms for structure indexes. We study two kinds of updates — the addition of a subgraph, intended to represent the a...

We propose a new compression algorithm that is tailored to database applications It can be applied to a collection of records and is especially e ective for records with many low to medium cardinality elds and numeric elds In addition this new technique sup ports very fast decompression Promising application domains include decision sup port systems DSS since fact tables which are by far the la...

Search engines are an essential tool for modern life. We use them to discover new information on diverse topics and to locate a wide range of resources. The search process in all practical search engines is supported by an inverted index structure that stores all search terms and their locations within the searchable document collection. Inverted indexes are highly optimised, and significant wo...

The speciication and derivation of substitution for the de Bruijn representation of-terms is used to illustrate programming with a function-sequence monad. The resulting program is improved by interactive program transformation methods into an eecient implementation that uses primitive machine arithmetic. These transformations illustrate new techniques that assist the discovery of the arithmeti...