Self-determination and conflict in romantic relationships.

Four studies examined associations between E. L. Deci and R. M. Ryan's (1985, 2000) construct of autonomy, responses to relationship disagreements, and dissatisfaction after conflict. In Study 1, diary data showed that trait autonomy predicted relationship autonomy, which in turn predicted relative satisfaction after disagreements. In Study 2, trait autonomy predicted relationship autonomy, which was associated with less defensive and more understanding responses to conflict. Studies 3 and 4 examined whether one's partner's relationship autonomy uniquely predicted reported and observed behavior during conflict. Autonomous reasons for being in the relationship (of both self and partner) predicted both reported and observed responses to conflict and feelings of satisfaction. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Chemical Expansion Due to Hydration of Proton‐Conducting Perovskite Oxide Ceramics

The crystal structures of proton‐conducting BaZr_1?xY_xO_3?x/2 (BZY05–BZY20) and BaCe_0.8Y_0.2O_2.9 (BCY20) during hydration/dehydration has been studied by in situ high‐temperature X‐ray diffraction and thermal analysis. A contraction/expansion of the crystal lattice associated with dehydration/hydration was observed for all materials at elevated temperatures and the polymorphic phase transition temperatures of BaCe_0.8Y_0.2O_2.9 were depressed by lowering the vapor pressure of water. A thermodynamic formalism is introduced to describe the chemical expansion associated with the hydration of oxygen vacancies in acceptor‐doped oxides. A conventional point defect model was applied to describe the lattice strain associated with the hydration. The chemical expansion is discussed with respect to the available volumetric data on the hydration of proton‐conducting oxide materials and its likely impact on ceramic fuel cells/hydrogen separation membranes utilizing a proton‐conducting electrolyte.     

Location of deuteron sites in the proton conducting perovskite BaZr0.50In0.50O3−y

High-resolution neutron powder diffraction data have been collected on deuterated and dried samples of the perovskite BaZr_0.5In_0.5O_2.75 at 5 K and room temperature, respectively. Inspection of Fourier nuclear density maps for the deuterated phase have allowed the deuteron position to be refined on a 12h (1/2, y, 0) crystallographic site, with y = 0.217(4) yielding a chemically reasonable OD distance of 0.92(2) Å. Evidence for anisotropy of the deuteron position is also found consistent with a 24k crystallographic site (0.56, 0.21, 0) indicative of displacements of the ion towards neighbouring oxygen ions. The presence of static oxygen disorder in both the dried and deuterated samples is apparent from the structural analyses. Raman spectra confirm short range deviations from cubic symmetry for both dried and hydrated samples.     

Hybrid artificial intelligence architecture for diagnosis and decision-making in manufacturing

This paper presents an architecture which combines artificial neural networks (ANNs) and an expert system (ES) into a hybrid, self-improving artificial intelligence (AI) system. The purpose of this project is to explore methods of combining multiple AI technologies into a hybrid intelligent diagnostic and advisory system. ANNs and ESs have different strengths and weaknesses, which can be exploited in such a way that they are complementary to each other: strengths in one system make up for weaknesses in the other, andvice versa. There is, presently, considerable interest in ways to exploit the strengths of these methodologies to produce an intelligent system which is more robust and flexible than one using either technology alone. Any process which involves both data-driven (bottom-up) and concept-driven (top-down) processing is especially well suited to displaying the capabilities of such a hybrid system. The system can take an incoming pattern of signals, as from various points in an automated manufacturing process, and make intelligent process control decisions on the basis of the pattern as preprocessed by the ANNs, with rule-based heuristic help or corroboration from the ES. Patterns of data from the environment which can be classified by either the ES or a human consultant can result in a high-level ANN being created and trained to recognize that pattern on future occurrences. In subsequent cases in which the ANN and the ES fail to agree on a decision concerning the environmental situation, the system can resolve those differences and retrain the networks and/or modify the models of the environment stored in the ES. Work on a hybrid system for perception in machine vision has been funded initially by an Oak Ridge National Laboratory seed grant, and most of the system components are operating presently in a parallel distributed computer environment.     

50 mol% indium substituted BaTiO3: Characterization of structure and conductivity

BaTi_0.5In_0.5O_3−δ was prepared by solid state reaction at 1400 °C. Rietveld analysis of high resolution X-ray powder diffraction data indicated phase pure as-prepared material that adopts a cubic perovskite structure with a = 4.1536(1) Å. Thermogravimetric analysis revealed the presence of significant levels of protons in the as-prepared material and 57% of the theoretically achievable protonation was attained on exposure to a humid environment at 185 °C. After hydration the cell parameter increased to 4.1623(1) Å. Electrical conductivity was measured both with fixed and variable frequency ac impedance methods as a function of temperature, oxygen-, water vapour- and heavy water vapour partial pressures. In the temperature range 400–800 °C a slight increase in the total conductivity with increasing oxygen partial pressure is encountered, characteristic of a contribution from p-type charge carriers. The effect of the water vapour pressure on conductivity below 600 °C is much more prominent indicative of dominant proton conduction. At 300 °C the total conductivity in wet O₂ was estimated to be 9.30 × 10⁻⁵ S/cm. At T > 800 °C the material is a pure oxide ion conductor.     

AN EGF EXERCISE IN PREDICTING DUCTILE INSTABILITY: PHASE 2, CRACKED PRESSURE VESSEL

This report discusses the results of a collaborative European Group on Fracture exercise to predict the pressure-crack size relationships of an experimental cracked pressure vessel which was undergoing tests for the CEGB. The details of the test and background mechanical properties data had been circulated to interested parties with a request for predictions to be returned prior to the vessel test results being published. The results of this exercise are described here, analysed in detail and compared with the test results. Collectively, eighteen individuals provided thirty eight different estimates of the vessel behaviour. The procedures used included R6 and variants of it, crack tip opening displacement approaches, engineering J design curve approaches, simple plastic collapse criteria and the GE J estimation scheme. Analysis of the predictions showed that: (1) in the prediction of maximum pressures, the plastic limit pressure was important; (2) in the prediction of initiation pressures the initiation toughness dominated; (3) the detailed form of the resistance curve had little influence on either the crack growth predictions or the maximum pressure predictions. (4) all forms of failure assessment diagram based upon the R6 axes were capable of producing accurate predictions. (5) where a poor model was used to represent the cracked section the results were unsatisfactory.     

Attempted isolation of fluorescent ageing pigments from apple fruits

The suitability of the lipofuscin assay for lipid peroxidation products in apple fruit has been investigated. Material with similar fluorescent properties to lipofuscin was extracted from apple. However, this fluorescence could be explained by the presence of cinnamoyl compounds and carotenoids in the extracts.     

Ripening of Apples during Storage I.—Introduction

The literature describing the respiration climacteric and some related processes in apples is discussed, with particular attention to implications for commercial storage practice.     

On the failure modes of alternative containment designs following postulated core meltdown

The containment response to a postulated core meltdown accident in a PWR ice condenser containment, a BWR Mark III containment and a BWR non-inerted Mark I containment has been examined to see if the WASH-1400 containment failure mode judgement for the Surry large, dry containment and the Peach Bottom Mark I inerted-containment are likely to be appropriate for these alternative containment plant designs. For the PWR, the representative accident chosen for the analysis is a large cold leg break accompanied by a loss of all electric power while the BWR representative event chosen is a recirculation line break without adequate core cooling function. Two containment event paths are studied for each of these two cases, depending on whether or not containment vapor suppression function is assumed to be available. Both the core and the containment pressure and temperature response to the accident events are computed for the four time intervals which characterize (a) blowdown of the pipe break, (b) core melt, (c) vessel melt-through, and (d) containment foundation penetration. The calculations are based on a best estimate of the most probable sequence, but certain phenomena and events were followed down multiple tracks. These include the temperature of the non-condensibles escaping the ice condenser into the upper compartment, the performance of the pressure suppression system, the distribution of non-condensibles between compartments, and the degree and rate of combustion of hydrogen generated from metal-water reactions. For the PWR ice condenser case, results indicate that the containment would be breached by (i) steam overpressurization during the blowdown period (time less than 20 sec) if the ice condenser fails to perform its function, (ii) by overpressurization and thermal stress during the core melt period if 25% or more of the core zirconium reacts with water followed by hydrogen burning and, and (iii) by the overpressurization due to non-condensibles before containment floor penetration is completed. For the BWR Mark III case, similar conclusions can be drawn for the loss of vapor suppression, and for the hydrogen burning if the extent of zirconium-water reaction is more than 35% of the core inventory. If the hydrogen burning fails to materialize, the containment can retain its integrity until containment meltthrough provided the melting is confined to the reactor pedestal area. It appears that the non-inerted Mark I containment is not so vulnerable to overpressurization from hydrogen burning as the Mark III; however, acceptable temperatures may be exceeded.