Co-occurrence Vectors from Corpora vs. Distance Vectors from Dictionaries

A comparison was made of vectors derived by using ordinary co-occurrence statistics from large text corpora and of vectors derived by measuring the inter-word distances in dictionary definitions. The precision of word sense disambiguation by using co-occurrence vectors from the 1987 Wall Street Journal (20M total words) was higher than that by using distance vectors from the Collins English Dictionary (60K head words + 1.6M definition words). However, other experimental results suggest that distance vectors contain some different semantic information from co-occurrence vectors.Comment: 6 pages, appeared in the Proc. of COLING94 (pp. 304-309)

Toward Fully Automated Robotic Platform for Remote Auscultation

Since most developed countries are facing an increase in the number of patients per healthcare worker due to a declining birth rate and an aging population, relatively simple and safe diagnosis tasks may need to be performed using robotics and automation technologies, without specialists and hospitals. This study presents an automated robotic platform for remote auscultation, which is a highly cost-effective screening tool for detecting abnormal clinical signs. The developed robotic platform is composed of a 6-degree-of-freedom cooperative robotic arm, light detection and ranging (LiDAR) camera, and a spring-based mechanism holding an electric stethoscope. The platform enables autonomous stethoscope positioning based on external body information acquired using the LiDAR camera-based multi-way registration; the platform also ensures safe and flexible contact, maintaining the contact force within a certain range through the passive mechanism. Our preliminary results confirm that the robotic platform enables estimation of the landing positions required for cardiac examinations based on the depth and landmark information of the body surface. It also handles the stethoscope while maintaining the contact force without relying on the push-in displacement by the robotic arm.Comment: 8 pages, 11 figure

コウブンギ ノ ヒカク 二 モトヅイタ プログラム サブン ノ ヒョウジ ホウシキ

Void formation and structure change by heavy ion irradiation were investigated in GaSb and InSb thin films. The voids were formed after irradiation in both materials. The average diameter of the voids was about 15nm in GaSb and 20nm in InSb irradiated with 60 keV Snþ ions to a fluence of 0:25 x 1018 ions/m2 at room temperature. The void size in InSb is larger than that in GaSb. The large void size is quantitatively explained by the amount of induced vacancies obtained by the SRIM code simulation. The Debye-Scherrer rings were observed in the SAED patterns on both materials. The structure changes into a polycrystal by ion irradiation. Additionally, the 200 superlattice reflections in the [001] net pattern were almost absent, and the streak pattern along the h110i direction was observed in InSb. It is considered that the anti phase domains of different lengths are formed by ion irradiation. Ion irradiation transforms the structure of InSb from chemical ordering to chemical disordering via the formation of anti phase boundaries

Resolving Zero Anaphora in Japanese

The paper presents a computational theory for resolving Japanes.e zero anaphora, based on the notion of discourse segment. We see that the discourse segment reduces the domain of antecedents for zero anaphora and thus leads to their efficient resolution

A Grammatico-Statistical Approach to Discourse Partitioning

rFhc papcr presents a new approach to text segmentation --. which concerns dividing a text into coherent discourse units. The approach builds on the the- ory of discourse segment (Nomoto and Nitta, 1993), incorporating ideals from the research on information retrieval (Saltou, 1988). A discourse segment has to do witIt a structnrc of Japanese discourse; it conld bc thought of as a linguistic unit dcnmrcatcd by wa, a Japanese topic particle, which may extend over several sentences. The segmentation works with discourse segmcnts and makes nsc of cohcrencc measure brined on tf. idf, a standard information retrieval measurement (Salton, 1988; IIearst, 1993). Expcrincnts have been done with a Japaucsc ncwspapcr corpus. It has been found that the present approach is quite sncccssfifi in recovering articles from the unstructured corpus