Haptic integration of planar size with hardness, texture, and planar contour.

Three experiments involving a total of 75 college students investigated the role of size information in haptic classification of custom-made planar objects when size covaries with hardness, texture, or planar contour. Exp 1 showed facilitation of classification by redundant (RD) size and shape cues, indicating the coprocessing of size and shape. Exps 2 and 3 used a withdrawal paradigm: Classification trials began with 2 RD properties, and 1 was then held constant (withdrawn). Exp 2 showed that when size and shape were RD, withdrawal of either impaired responses, whereas when size was RD with texture or hardness, only size withdrawal had an effect. Exp 3 demonstrated that this size weighting was not restricted to a single procedure for exploration. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Algebraic decoding of the (32, 16, 8) quadratic residue code

An algebraic decoding algorithm for the 1/2-rate (32, 16, 8) quadratic residue (QR) code is found. The key idea of this algorithm is to find the error locator polynomial by a systematic use of the Newton identities associated with the code syndromes. The techniques developed extend the algebraic decoding algorithm found recently for the (32, 16, 8) QR code. It is expected that the algebraic approach developed here and by M. Elia (1987) applies also to longer QR codes and other BCH-type codes that are not fully decoded by the standard BCH decoding algorithm     

Bax- and Bak-induced cell death in the fission yeast Schizosaccharomyces pombe

The dental profession faces educational, scientific, and ethical challenges in orofacial pain and headache. Past educational deficiencies are being addressed with guidance and recommendations from the AADS, the ADA, and the AAOP. With education and further research, many dental ethical questions in TMD will be resolved. The educational process must continue with a solid foundation in scientific basis provided in university settings. The appropriate use of TMD diagnostic machines, treatment modalities, and management of perpetuating factors such as sleep will evolve with the new knowledge of scientific discovery. These are some of the many challenges of orofacial pain and headache disorders that warrant special consideration.     

Authenticating network attached storage

We present an architecture for network-authenticated disks that implements distributed file systems without file servers or encryption. Our system provides network clients with direct network access to remote storage     

Low-loss optical stripe waveguides in LiNbO3 formed by He+ implantation

We report the fabrication of low-loss stripe optical wave-guides in LiNbO 3by He+ implantation. At a wavelength of 633 nm the waveguides were found to have a propagation loss as low as l-OdBcm?1, dependent on the make-up of the vertical waveguide walls. These waveguides were also found to exhibit no photorefractive effects.     

A structure-mapping model for word problems.

Tested predictions of a structure-mapping model for word problems in 4 experiments involving 132 undergraduates. In Exps I and II, Ss rated the potential usefulness of solutions for pairs of problems—mixture problems in Exp I and work problems in Exp II. The problems were either equivalent (same story, same procedure), similar (same story, different procedure), isomorphic (different story, same procedure), or unrelated (different story, different procedure). Ss in Exp III used an example solution for a work problem and a mixture problem to generate equations to related test problems that differed in their mappings from the example. In Exp IV, Ss matched concepts in the test problems to corresponding concepts in the examples to provide a direct measure of their ability to construct mappings across different problems. In Exps III and IV, Ss performed significantly better on isomorphic problems than on similar problems, and significantly better on work isomorphs than on mixture isomorphs. Results suggest that a structure-mapping model that emphasizes the transparency and structure of the mapping can be used to predict the usefulness of a solution. (19 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Reliability of multicomponent assemblages

The reliability of multicomponent assemblages is of interest to engineers in many disciplines. It has been shown that the reliability of a multicomponent assembly—a simple frame—may be estimated through the use of a causal network. The causal network approach does not require the modelling of a structure as series or non-series; it only requires that the network of component reliabilities by acyclical. Assumptions about local member influence are implicitly included only through the use of conditional probability matrices throughout the network. These matrices may be generated through the use of a noisy OR gate and/or a rule-based system. It is postulated that the system reliability of any multicomponent assemblage can be estimated in this manner. Testing of the application of the concept to problems of realistic dimensions is currently under way.     

Wavelength demultiplexing heterojunction phototransistor

Experimental and theoretical results on a wavelength demultiplexing receiver composed of an AlGaAs/GaAs heterojunction phototransistor (HPT) integrated within a resonant cavity are reported. A high quality factor cavity was formed using a very thin In/sub 0.05/Ga/sub 0.95/As active absorption layer in the collector depletion region of the HPT. Crosstalk attenuations of 15 dB for dual and 12 dB for triple wavelength demultiplexing were demonstrated. The individual HPTs had an optical gain of 500 at the resonant modes. Theoretical calculations predict crosstalk attenuation levels as high as 40 dB with high reflection mirrors on both ends of the cavity.<>