Memory in sub-clinical obsessive-compulsive checkers

In a series of experiments we extended the research on possible memory deficits in subclinical obsessive-compulsive Ss who reported excessive checking. Using a variety of memory tests we compared 20 subclinical checkers to 20 Ss without obsessive-compulsive symptomatology. Contrary to hypothesis, checkers remembered self-generated words better than read words just as much as did normals, but they were more likely than normals to report thinking they had studied words that, in fact, had not been on the study list. Further, they more often confused whether they read or generated the words at study. Checkers did not appear to perseverate on already-recalled words on repeated free recall tests any more than did normals. However, checkers remembered fewer actions overall and more often misremembered whether they had performed, observed, or written these actions. Such memory deficits may contribute to the development of excessive checking.     

Conditions for the formation and the structure of a metastable cerium modification

Mathematical simulation of heat transfer processes and X-ray diffraction analysis were used to show that, upon the quenching of cerium from the melt at rates of greater than 3.5 × 10⁵ K/s, a metastable μ′-Ce modification with a seven-layer hexagonal structure is formed. The formation of μ′-Ce is explained by the accumulation and ordering of stacking faults in the fcc lattice of the γ phase leading the process of crystallization upon rapid cooling from the melt.     

The phosphorous level fine structure in homoepitaxial and polycrystalline n-type CVD diamond

The application of very sensitive photocurrent-based spectroscopic techniques have led to the detection of new levels for the electronic structure of the phosphorous donor in n-type CVD diamond. By combining quasi-steady-state photocurrent measurements (PC), photothermal ionisation spectroscopy (PTIS) and the highly sensitive Fourier transform photocurrent spectroscopy (FTPS) technique at different temperatures, ranging from liquid nitrogen temperature to 170 K, the resulting spectra point to a richer structure than assumed up to now. This is the consequence of the improved sample quality over the last years, opening up to a much larger attainable doping window. By using doping levels, ranging from 10¹⁹ cm⁻³ down to 10¹⁶ cm⁻³ on 111 -oriented Ib HPHT substrates, still giving rise to measurable n-type conductivity, spectra showed less line broadening and more fine structure. Finally, the results will be compared with spectra measured on active P-doped polycrystalline n-type films.     

齿轮齿条式液压转向机齿条杆部的表面处理工艺及参数测定

本文重点介绍该主一些加工的参数设定过程,该工艺及参数也适应于推进杆与密切圈有相对运动的液压动力机构地其推进杆表面的处理处理。     

Two-Dimensional Periodic Problem of the Theory of Elasticity for an Isotropic Plane with Curvilinear Holes and Edge Cracks

Materials Science - By the method of singular integral equations, we solve a two-dimensional periodic problem of the theory of elasticity for an isotropic plane with infinitely many curvilinear...     

Multiagent technology for the application of a distributing function for load balancing in multiserver systems

We consider the characteristic features of applying a distributing function to load balancing in multiserver networks.     

Rabies virus quasispecies: implications for pathogenesis

Passage of the mouse-adapted rabies virus strain CVS-24 (where CVS is challenge virus standard) in BHK cells results in the rapid selection of a dominant variant designated CVS-B2c that differs genotypically and phenotypically from the dominant variant CVS-N2c present in mouse-brain- or neuroblastoma-cell-passaged CVS-24. The glycoprotein of CVS-B2c has 10 amino acid substitutions compared with that of CVS-N2c. Because CVS-B2c can be reproducibly selected in BHK cells, it is likely to be a conserved minor subpopulation of CVS-24. CVS-N2c is more neurotropic in vitro and in vivo than CVS-B2c, which replicates more readily in nonneuronal cells in vitro and in vivo. These characteristics appear to be relevant to the pathogenicity of the two variants. CVS-N2c is more pathogenic for adult mice than CVS-B2c. In contrast, CVS-B2c is more pathogenic for neonatal mice. These differences in pathogenicity are reflected in the selection pattern when mixtures of CVS-N2c and CVS-B2c were used to infect neonatal and adult mice. Although CVS-N2c was highly selected in adult mice, no selection for either variant was seen in neonates, suggesting that certain aspects of development, such as maturation of the nervous and immune systems, may contribute to the selection process. We speculate that the existence of different variants within a rabies virus strain may facilitate the virus in overcoming barriers to its spread, both within the host and between species.