Given two genomes with duplicate genes, Zero Exemplar Distance is the problem of deciding whether the two genomes can be reduced to the same genome without duplicate genes by deleting all but one copy of each gene in each genome. Blin, Fertin, Sikora, and Vialette recently proved that Zero Exemplar Distance for monochromosomal genomes is NP-hard even if each gene appears at most two times in ea...

The present research examines MIS exemplar articles, analyzing their citation patterns in MIS and other scientific fields. Using MIS Quarterly articles of the year and peer-nominated articles, we identified 36 exemplar MIS articles. In all, 421 journals contained articles that cited the exemplars. Our five findings are: (1) the MIS exemplars cover a wide range of themes, (2) the average lifetim...

Psychological theories of categorization generally focus on either rule- or exemplar-based explanations. We present 2 experiments that show evidence of both rule induction and exemplar encoding as well as a connectionist model, ATRIUM, that specifies a mechanism for combining rule- and exemplar-based representation. In 2 experiments participants learned to classify items, most of which followed...

Exemplar and distributional accounts of categorization make differing predictions for the classification of a critical exemplar precisely halfway between the nearest exemplars of 2 categories differing in variability. Under standard conditions of sequential presentation, the critical exemplar was classified into the most similar, least variable category, consistent with an exemplar account. How...

Two experiments are reported in which four dependent variables; typicality ratings, response times, category-naming frequencies, and exemplar-generation frequencies of natural language concepts, were predicted by two sorts of prototype predictors and by an exemplar predictor related to Heit and Barsalou’s (1996) instantiation principle. In the first experiment, the exemplar predictor was compar...

This paper first proposes a (to the author’s limited knowledge) novel extension to the OpenIE paradigm, to allow the expression of recursive relations, and presents a fully implemented extension to the EXEMPLAR system, uncreatively referred to as Recursive-EXEMPLAR, to extract recursive n-ary relations automatically and with very high precision. It then explores the possibility of a "concept ke...

It is generally assumed that when making categorization judgments the cognitive system learns to focus on stimuli features that are relevant for making an accurate judgment. This is a key feature of hybrid categorization systems, which selectively weight the use of exemplar- and rule-based processes. In contrast, Hahn et al. (2010) have shown that people cannot help but pay attention to exempla...