The differences in AEP (Auditory Evoked Potentials) and SEP (Somatosensory Evoked Potentials) between epileptics and normal subjects

152 epileptics (male: 92, female: 60) and 200 normal subjects (100 of each sexes) were compared on AEP (Auditory Evoked Potential) and SEP (Somatosensory Evoked Potential), which were recorded through monopolar and bipolar derivations. The latencies and interpeak amplitudes of AEPs and VEPs were tested statistically by ANCOV A excluding the influence of age and drugs had been administered. The following results were obtained. 1. In AEPs, the latencies in epileptics were significantly longer compared with healthy subjects. These tendencies were more marked in short and middle latency components in males, but more marked in late components in females. 2. Interpeak amplitudes of AEP were relatively smaller in epileptics compared with healthy subjects. 3. In SEPs, the latencies were significantly longer in epileptics compared with healthy subjects. These tendencies were more marked in females. 4. There was no consistent tendency in interpeak amplitudes of SEP between epileptics and normal subjects in both sexes, but the interpeak amplitudes between predominant components were smaller in epileptics than normal subjects. 5. In epileptics, between the subjects had been administered the drug (each of CBZ, PB, VPA or PHT) or not, significant differences in latencies and interpeak amplitudes were not confirmed with the components significantly different in latencies and amplitudes between epileptics and healthy subjects were found. We verified the significant differences in AEP and SEP between epileptics and healthy subjects excluding the influences of age and drugs, even not considering the seizure types nor epileptic focus sites. It was supposed the disturbance in auditory and somatosensory pathway up to cortex in the central nervous system in epileptics

Construction of Grammar Based Term Extraction Model for Japanese

Colloque avec actes et comité de lecture. internationale.International audienceIn this paper we propose a grammar-based term extraction model for Japanese toward construction of multilingual term dictionary. The proposed approach evaluates termhood using morphological patterns of terms. Most of terms in Japanese consist of compound nouns or simple phrases, but detailed grammatical patterns for term extraction have not been constructed because of their complex compounding mechanisms. Applying detailed morphological investigation to Japanese compounding, we make sure their structures of word formation that can be comparable to those of Indo-European terms such as English and French

Pattern Based Term Extraction Using ACABIT System

International audienceIn this paper, we propose a pattern-based term extraction approach for Japanese, applying ACABIT system originally developed for French. The proposed approach evaluates termhood using morphological patterns of basic terms and term variants. After extracting term candidates, ACABIT system filters out non-terms from the candidates based on log-likelihood. This approach is suitable for Japanese term extraction because most of Japanese terms are compound nouns or simple phrasal patterns

The differences in VEP (Visual Evoked Potentials) between epileptics and normal subjects

The differences between epileptics and healthy subjects on the visual evoked potential (VEP) were studied. VEPs were recorded through the two derivations (2 ch : O 1→A 1+2, 5 ch : O 1→Cz). The differences in the latencies and interpeak amplitudes were compared and tested statistically, respectively for each sex, with special reference to the drugs been administered. 1. The latencies of VEP components in epileptics were longer than those in healthy subjects, in both sexes. 2. Interpeak amplitudes of VEP components in epileptics were smaller than those in healthy subjects, especially in late components, in both sexes. 3. These tendencies were more marked in males than in females. 4. In epileptics, between the subjects being administered each drug (CBZ, PB, VPA or PHT) or not, significant differences in latencies and intrerpeak amplitudes were not confirmed, with the components in which significant differences in latencies and amplitudes between epileptics and healthy subjects were found. We verified the significant differences in VEPs between epileptics and healthy subjects, which suggested the dysfunction in epileptics in its brain stem and lateral geniculate body, even not considering the seizure types nor epileptic focus sites

Deverbal Compound Noun Analysis Based on Lexical Conceptual Structure

This paper proposes a principled approach for analysis of semantic relations between constituents in compound nouns based on lexical semantic structure. One of the difficulties of compound noun analysis is that the mechanisms governing the decision system of semantic relations and the representation method of semantic relations associated with lexical and contextual meaning are not obvious. The aim of our research is to clarify how lexical semantics contribute to the relations in compound nouns since such nouns are very productive and are supposed to be governed by systematic mechanisms. The results of applying our approach to the analysis of noun-deverbal compounds in Japanese and English show that lexical conceptual structure contributes to the restrictional rules in compounds

Deverbal Compound Noun Analysis Based on Lexical Conceptual Structure

This paper proposes a principled approach for analysis of semantic relations between constituents in compound nouns based on lexical semantic structure. One of the difficulties of compound noun analysis is that the mechanisms governing the decision system of semantic relations and the representation method of semantic relations associated with lexical and contextual meaning are not obvious. The aim of our research is to clarify how lexical semantics contribute to the relations in compound nouns since such nouns are very productive and are supposed to be governed by systematic mechanisms. The results of applying our approach to the analysis of noun-deverbal compounds in Japanese and English show that lexical conceptual structure contributes to the restrictional rules in compounds.

A Method for Extracting Composite Terms from Japanese Domain Corpora

テキストコーパスからの用語抽出は、自然言語処理技術の重要な応用である。従来テキストコーパスから用語候補を抽出する方法として、主として候補出現に関わる統計的指標を用いて用語性を判定する方法が採用されて来たが、統計的手法では出現頻度の低い候補についての判定が困難であった。今回の発表では、複合語に注目し、用語性を損なう形態素出現パターンを排除する形での用語候補抽出を行うことにより、高い精度で複合語用語抽出が可能となることを示す。Term extraction is one of the most important application of natural language processing technologies. Statistic criteria are widely adopted to evaluate the termhood of the extracted candidates. However, it is difficult to evaluate the termhood of less frequent candidates. In this study we propose a method for Japanese composite term extraction in which unproper morpheme patterns are eliminated. Using the new method, high precision of term extraction can be attained for Japanese composite terms