Atomic displacements in palladium/ platinum solid solutions

X-ray measurements reveal that Pd/Pt solid-solution alloys have higher Debye temperatures and lower root-mean-square dynamic displacements than the average for the pure metals. The root-mean-square static displacements are quantitatively interpreted in terms of a shortening of the Pd/Pt interatomic distance and the asymmetry of unlike neighbours about an average atom.     

Cross-Modal Localization via Sparsity

Cross-modal analysis is a natural progression beyond processing of single-source signals. Simultaneous processing of two sources can reveal information that is unavailable when handling the sources separately. Indeed, human and animal perception, computer vision, weather forecasting, and various other scientific and technological fields can benefit from such a paradigm. A particular cross-modal problem is localization: out of the entire data array originating from one source, localize the components that best correlate with the other. For example, auditory and visual data sampled from a scene can be used to localize visual events associated with the sound track. In this paper we present a rigorous analysis of fundamental problems associated with the localization task. We then develop an approach that leads efficiently to a unique, high definition localization outcome. Our method is based on canonical correlation analysis (CCA), where inherent ill-posedness is removed by exploiting sparsity of cross-modal events. We apply our approach to localization of audio-visual events. The proposed algorithm grasps such dynamic audio-visual events with high spatial resolution. The algorithm effectively detects the pixels that are associated with sound, while filtering out other dynamic pixels, overcoming substantial visual distractions and audio noise. The algorithm is simple and efficient thanks to its reliance on linear programming, while being free of user-defined parameters     

Kinetics of ordering in NiPt

The kinetics of ordering for an almost equiatomic NiPt alloy were measured by X-ray diffraction. The measurements were carried out at the temperature of annealing between 390 and 570° C.The results show that the transition from a disordered to an ordered state can be attributed to two processes: one is a nucleation of ordered zones and their growth and the other is a homogeneous ordering process. The latter is dominant at low temperatures (< 500° C) and nucleation-and-growth kinetics are dominant at higher temperatures.     

Guiding collaborative revision of science explanations

International Journal of Computer-Supported Collaborative Learning - This paper illustrates how the combination of teacher and computer guidance can strengthen collaborative revision and identifies...     

A stercoraceous ulcer of the colon in neglected Hirschsprung''s disease

Growth hormone receptor (GHR) has a major role in the regulation of growth hormone action, and thus, is an obvious candidate gene associated with milk production traits in mammals. The present authors have sequenced 273 bp of the 3' flanking region of the bovine GHR, and found three length variants and one base substitution polymorphism in this region. Allele frequencies of the length variants differ between Finnish native and commercial dairy cattle breeds. The chromosomal localization of GHR was confirmed to bovine chromosome 20 by synteny mapping and linkage analysis.     

The value of precise preoperative localization of colonic arteriovenous malformation in childhood

Massive hemorrhage from the gastrointestinal tract in a 12-yr-old boy caused by a congenital atypically located colonic arteriovenous malformation is described. Guided and "clean" resection of the involved colon was possible due to preoperative selective angiography, which proved to be the most efficient diagnostic tool. Histologic documentation of this rare pathology in childhood is presented, and the classification and features of the disease are briefly reviewed.     

Work values and organizational commitment.

Dubin, Champoux and Porter (1975) found a strong relationship between central life interests of workers and their commitment to the organization. This paper extends their findings by investigating the relationship between work values, defined as the Protestant Ethic of the worker, and commitment to the organization. A distinction is made between moral and calculative commitment, and it is shown that work values are related more to moral than calculative involvement.     

Growth and properties of Hg1-x Cdx Te epitaxial layers

The growth of epitaxial layers of mercury-cadmium-telluride (Hg_1-xCd_xTe) with relatively low x (0.2-0.3) from Te-rich solutions in an open tube sliding system is studied. The development of a semiclosed slider system with unique features permits the growth of low x material at atmospheric pressure. The quality of the films is improved by the use of Cd_1-yZ_yTe and Hg_1-xCd_xTe substrates instead of CdTe. The substrate effects and the growth procedure are discussed and a solidus line at a relatively low temperature is reported. The asgrown epitaxial layers are p-type with hole concentration of the order of 1·10¹⁷ cm⁻³, hole mobility of about 300 cm²·V⁻¹ sec⁻¹ and excess minority carrier life-time of 3 nsec, at 77 K.     

Intensive child parent relationship therapy with Israeli parents in Israel.

This study was designed to determine the effectiveness of an intensive child parent relationship therapy (CPRT)—filial therapy training (G. L. Landreth & S. Bratton, 2006)—as a method of intervention for Israeli parents in Israel, families who are experiencing prolonged stress and trauma since Israel's creation. Results of the multivariate analysis of covariance revealed that the Israeli parents in the experimental group (14 parents) significantly increased their level of empathic interactions with their children and their attitude of acceptance toward their children and significantly reduced their level of stress related to parenting as compared with parents in the nontreatment comparison group (13 parents). This study supports the use of CPRT for promoting the child–parent relationship in Israeli parents living in Israel. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Quantitative MR volumetry in Alzheimer's disease. Topographic markers and the effects of sex and education

We determined topographic selectivity and diagnostic utility of brain atrophy in probable Alzheimer's disease (AD) and correlations with demographic factors such as age, sex, and education. Computerized imaging analysis techniques were applied to MR images in 32 patients with probable AD and 20 age- and sex-matched normal control subjects using tissue segmentation and three-dimensional surface rendering to obtain individualized lobar volumes, corrected for head size by a residualization technique. Group differences emerged in gray and white matter compartments particularly in parietal and temporal lobes. Logistic regression demonstrated that larger parietal and temporal ventricular CSF compartments and smaller temporal gray matter predicted AD group membership with an area under the receiver operating characteristic curve of 0.92. On multiple regression analysis using age, sex, education, duration, and severity of cognitive decline to predict regional atrophy in the AD subjects, sex consistently entered the model for the frontal, temporal, and parietal ventricular compartments. In the parietal region, for example, sex accounted for 27% of the variance in the parietal CSF compartment and years of education accounted for an additional 15%, with women showing less ventricular enlargement and individuals with more years of education showing more ventricular enlargement in this region. Topographic selectivity of atrophic changes can be detected using quantitative volumetry and can differentiate AD from normal aging. Differential effects of sex and years of education can also be detected by these methods. Quantification of tissue volumes in vulnerable regions offers the potential for monitoring longitudinal change in response to treatment.