The neural basis of pattern recognition is a central problem in visual neuroscience. Responses of single cells were recorded in area V4 of macaque monkey to three classes of periodic stimuli that are based on spatial derivative operators: polar (concentric and radial), hyperbolic, and conventional sinusoidal (Cartesian) gratings. Of 118 cells tested, 16 percent responded significantly more to p...

We discuss recent models of chemical evolution in the developing and collapsing protostellar envelopes associated with low-mass star formation. In particular, the effects of depletion of gas-phase molecules onto grain surfaces is considered. We show that during the middle to late evolutionary stages, prior to the formation of a protostar, various species selectively deplete from the gas phase. ...

Accuracy of the object classification is depend upon the feature vector of the object. Poroscopy is the method of pattern matching of the fingerprint images based upon pores. Pores of the fingerprint image are extracted by using Marker Controlled Watershed Segmentation. The features of the pores are extracted by various methods which are rotation variant. To improve the accuracy of the pattern ...

[1] The angle m between the geomagnetic dipole axis and the geocentric solar magnetospheric (GSM) z axis, sometimes called the “dipole tilt,” varies as a function of UT and season. Observations have shown that the cross-polar cap potential tends to maximize near the equinoxes, when on average m = 0, with smaller values observed near the solstices. This is similar to the well-known semiannual va...

Triclinic crystals of hen egg-white lysozyme cross-linked with glutaraldehyde have been treated with various denaturants and found to be susceptible to x-ray structure analysis even after major conformational changes in the protein. Cross-linked crystals were isomorphous with the native form, and electron density difference maps indicated the locations of intermolecular corss-links, but showed ...

Cross sections for mixtures of tryptic digest peptide ions formed by electrospray ionization have been measured by a new ion mobility/time-of-flight mass spectrometry technique. Analysis of a series of 113 peptides containing 5-10 residues and having a single lysine group located at the C-terminal end show that cross sections are largely dependent upon the amino acid composition of each peptide...

We have used a positively charged lipid monolayer to form two-dimensional bundles of F-actin cross-linked by ! -actinin to investigate the relative orientation of the actin filaments within them. This method prevents growth of the bundles perpendicular to the monolayer plane, thereby facilitating interpretation of the electron micrographs. Using ! -actinin isoforms isolated from the three types...

APPLICATIONS J. A. Boluda1 F. Pardo1 T. Kayser2 J. J. P erez1 J. Pelechano1 1Institut de Rob otica. Universitat de Val encia, Val encia, Spain 2Fachhochschule Mannheim, Mannheim, Germany ABSTRACT A foveated camera has been designed and fabricated. The camera is implemented using a new foveated CMOS sensor which incorporates a log-polar transformation. This transformation has specially interesti...

My goal in this paper is to use cross-polar anomaly as an empirical basis for motivating and developing a particular approach to the semantics of gradable adjectives and the representation of adjectival polarity. Specifically, I will argue that gradable adjectives denote relations between individuals and extents, or intervals on a scale, as in the work of Seuren 1978, 1984, von Stechow 1984b, a...

A polar and neutral polymethacrylate-based monolithic column was evaluated as a hydrophilic interaction capillary electrochromatography (HI-CEC) stationary phase with small polar-neutral or charged solutes. The polar sites on the surface of the monolithic solid phase responsible for hydrophilic interactions were provided from the hydroxy and ester groups on the surface of the monolithic station...