Abstract Cubic Na 3 PSe 4 as a solid‐state electrolyte for room temperature Na‐ion batteries is prepared by solid state reaction of stoichiometric amounts of Na 2 Se, red P, and Se under Ar (BN tube, 300 °C, 12 h).
There are billions of images on the Internet. Today, searching for a desired image is largely based on textual data such as filename or associated text on the web page; not much use is made of the image content. There are good reasons for this. The field of content-based image retrieval, which emerged during the 1990s, focused primarily on color and texture cues. These were easier to model than shape, but they turned out to be much less useful than originally hoped. I shall review some of the recent developments in the field of visual object recognition in the computer vision community that offer greater promise. Much better image features for characterizing shape, advances in machine learning techniques, and the availability of large amounts of training data lie at the heart of these approaches.
Abstract This study investigated (a) the sensitivity of a modified Stroop Colour Word Test to index attentional deficits in mild head-injured patients and (b) the influence of anxiety on attentional performance. Patients (N = 35) were individually matched with controls for age, sex, education, and IQ. Mild head-injured patients performed more poorly than did controls on the original, modified, and interference conditions of the Stroop Test. Although state anxiety influenced performance on the Stroop Test, deficits in performance were not explained simply by anxiety. The findings support the hypothesis that mild head injury does result in an identifiable impairment of focused attention.
No abstract is provided for this article.
Abstract Potentiodynamische Polarisationskurven wurden für 5 Legierungen mit dem Elektrolyten 0.15 N‐H3BO3 + O. 1 5 N Na2B4O‐,′ l0 H 2 O (pH=8.7) aufgenommen.
Identifying the massive progenitor stars that give rise to core-collapse supernovae (SNe) is one of the main pursuits of supernova and stellar evolution studies. Using ground-based images of recent, nearby SNe obtained primarily with KAIT, astrometry from 2MASS, and archival images from HST, we have attempted the direct identification of the progenitors of 16 SNe II and SNe Ib/c. We may have identified the progenitors of the SNe II 1999br, 1999ev, and 2001du as supergiant stars with M^0_V ~ -6 mag in all three cases. We may have also identified the progenitors of the SNe Ib 2001B and 2001is as very luminous supergiants with M^0_V ~ -8 to -9 mag, and possibly the progenitor of the SN Ic 1999bu as a supergiant with M^0_V ~ -7.5 mag. Additionally, we have recovered at late times SNe 1999dn, 2000C, and 2000ew, although none of these had detectable progenitors on pre-SN images. In fact, for the remaining SNe only limits can be placed on the absolute magnitude and color (when available) of the progenitor. The detected SN II progenitors and limits are consistent with red supergiants as progenitor stars, although possibly not as red as we had expected. Our results for the SNe Ib/c do not strongly constrain either Wolf-Rayet stars or massive interacting binary systems as progenitors.
