We assessed the role of the DRD2 dopaminergic striatal gene polymorphism on performance in unidimensional and conjunctive rule-based category learning tasks. The unidimensional task requires a rule along a single stimulus dimension, while the conjunctive rule task utilizes a combination of two dimensions to distinguish members of each category. The results show that DRD2 C957T T allele carriers...

This paper presents a syntactic analysis method that first detects conjunctive structures in a sentence by checking parallelism of two series of words and then analyzes the dependency structure of the sentence with the help of the information about the conjunctive structures. Analysis of long sentences is one of the most difficult problems in natural language processing. The main reason for thi...

We consider a problem for storing a map that associates a key with a set of values. To store n values from the universe of size m, it requires log2 ( m n ) bits of space, which can be approximated as (1.44 + n) log2 m/n bits when n ≪ m. If we allow ε fraction of errors in outputs, we can store it with roughly n log2 1 ε bits, which matches the entropy bound. Bloom filter is a wellknown example ...

We consider the problem of computing the complete answer to a query when there is limited access to relations, i.e., when binding patterns require values to be specified for certain attributes in order to retrieve data from a relation. This problem is common in information-integration systems, where heterogeneous sources have diverse and limited query capabilities. A query is stable if for any ...

The most natural and perhaps most frequently used method for testing membership of an individual tuple in a conjunctive query is based on searching trees of partial solutions, or search-trees. We investigate the question of evaluating conjunctive queries with a time-bound guarantee that is measured as a function of the size of the optimal search-tree. We provide an algorithm that, given a datab...

The multiple layers of medial entorhinal cortex (mEC) contain cells that differ in selectivity, connectivity, and cellular properties. Grid cells in layer II and in the deeper layers express triangular grid patterns in the environment. The firing rate of the conjunctive cells found in layer III and below, on the other hand, show grid-by-head direction tuning. In this study, we model the differe...

We consider the problem of computing the complete answer to a query when there is limited access to relations, i.e., when binding patterns require values to be speciied for certain attributes in order to retrieve data from a relation. This problem is common in information-integration systems, where heterogeneous sources have diverse and limited query capabilities. A query is stable if for any i...

Kolaitis and Vardi pointed out that constraint satisfaction and conjunctive query containment are essentially the same problem. We study the Boolean conjunctive queries under a more detailed scope, where we investigate their counting problem by means of the algebraic approach through Galois theory, taking advantage of Post’s lattice. We prove a trichotomy theorem for the generalized conjunctive...

Objectives: The Josa, which is a Korean grammatical morpheme that indicates relationship to the clause or conveys more specific meaning, an important indicator in grammar development early childhood. purpose of this study was examine Josa use spontaneous language children childhood.Methods: Fifty young aged 2;6-3;11 years participated study. participants were classified into three age groups 6-...