The nature of dislocation loops in neutron irradiated zirconium

The nature of the damage structure in neutron-irradiated zirconium has been studied using transmission electron microscopy. The damage structure consists of dislocation loops with $\text{a/3?11}\text{2}\text{?}\text{0〉}$ Burgers vectors. No evidence was found for $\text{c}$ component dislocation loops. The dislocation loops are non-edge in character and are elliptical with the loop minor axis in the (0001) plane and the major axis in the vicinity of the [0001] direction. This ellipticity was particularly marked for large vacancy loops whereas interstitial loops tended to be circular. Under all irradiation conditions studied, the loop populations were mixed interstitial/vacancy.     

Visual short-term memory in the hearing and the deaf.

Tested 9 deaf and 9 normal 15-27 yr olds on their ability to report letters, shapes, and nonsense figures from a tachistoscopic presentation. Deaf Ss performed worse than hearing Ss on recall of figural information, thereby supporting a linguistic coding hypothesis. However, there was no difference between the groups on position information, and letter confusions were primarily visual in both groups. Findings suggest that more attention should be given to visual short-term memory in theoretical models of memory. Formation of the icon was apparently not affected by a linguistic deficit, since effects of stimulus duration and type of viewing (continuous vs interrupted) were similar in both hearing and deaf Ss. Significant positive correlations which were found between deaf Ss' school reading scores and their tachistoscopic scores were not interpreted as support for a linguistic coding hypothesis, but rather as support for the notion that the memory skills tested in the experiment may underlie reading ability. (French summary) (24 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effect of intolerance of ambiguity upon product perceptions.

32 male undergraduates, with high and low scores on S. Budner's (see record 1964-08477-001) measure of intolerance of ambiguity, judged the newness of products varying systematically in atypicality and reported their willingness to buy them. The more intolerant Ss perceived the atypical products as newer than did tolerant Ss. Perceived product newness tended to be positively related to willingness to buy among tolerant Ss, but negatively related among intolerant ones. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Characterization of a differential fiber Bragg grating sensor for oil-water boundary detection

We investigate the operating characteristics of an oil-water boundary detector utilizing differential interrogation of fiber Bragg grating sensors. The system resolution is shown to be stable with respect to the choice of strain actuator and long-term temperature changes and changes in the initial strain on the fiber string. Fluid flow, particularly turbulent flow, is found to reduce system resolution significantly for the current system design. Improvements in the system design are required to minimize the effects of fluid flow and to accurately detect the presence of oil-water emulsions.     

Noninvasive predictors of sudden cardiac death in men with coronary heart disease. Predictive value of maximal stress testing

In a follow-up study of 1,852 men with coronary heart disease, 195 deaths occurred within the first 3 years (33 +/- 13 months [mean +/- standard deviation]). Analysis of these cases indicated that the risk of sudden cardiac death in ambulatory men with clinical manifestations of coronary heart disease may be readily estimated from noninvasive clinical and exercise criteria. The important predictors are indexes of the severity of coronary heart disease and impairment of peak left ventricular function demonstrated with symptom-limited maximal exercise. The advantages of these predictors are that they may be elicited on the initial study as well as on follow-up noninvasive examinations of ambulatory patients. The appearance of nonelectrocardiographic predictors in serial examinations may provide an indication for invasive studies and be a more important finding than the ischemic S-T reponse to exertion.     

Volunteering as a function of field structure.

It was predicted that significantly more volunteering would occur when test Ss observed the invitation (to participate in an experiment) being accepted prior to their being asked than would occur in the control condition (where S had no opportunity to observe the behavior of others in the invitation situation); and significantly less when refusal was observed, as compared with the control condition. The results support the predictions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Motivational factors in the violation of a prohibition.

An experiment with 90 college Ss. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Fluorescent probe study of sulfonamide binding to povidone

The possibility of using a fluorescent probe technique for the study of drug-providone (I) interactions was investigated. 1-Anilino-8-naphthalenesulfonate (II) was used as the probe. Sulfanilamide, sulfacetamide, and sulfabenzamide were used as the binding competitors. Both sulfacetamide and sulfabenzamide decreased the fluorescence intensity of the I-II complex, while sulfanilamide increased the intensity. The fluorescence depression was greater with sulfabenzamide than with sulfacetamide, indicating that the former is more strongly bound to povidone. Since sulfabenzamide has a greater hydrophobic group (phenyl) than sulfacetamide (methyl), the binding of these sulfonamides to povidone is probably at least partially hydrophobic in nature. The enhanced fluorescence intensity of the I-II complex in the presence of sulfanilamide is believed to involve hydrogen bonding in which the sulfanilamide acts as an intermediary between I and II. Double reciprocal plots for the I-II and sulfonamide-I interactions were employed to obtain a binding constant of 3.2 X 10(4) M-1 for the I-II interaction. The association constants for sulfacetamide and sulfabenzamide were calculated by means of the Klotz equation to be 13.4 and 56.8 M-1, respectively. The povidone molecules appear to have 1.28 binding sites for these compounds under the experimental conditions.     

Attitudes as adjustments to stimulus, background, and residual factors.

"Statements concerning war and peace were judged under simulated group conditions and in an alone condition… . When individuals are exposed to the opinions of others with regard to statements concerning war and peace, it is found that their own expressed attitudes shift more or less markedly toward group opinion. It is also found that the more frequently individuals respond to background influences, the larger is their shift toward or away from the group. Both the frequency and amount of shift from alone opinion toward background judgments correlate with degree of submissiveness as measured by the Allport A-S Reaction Study." 19 references. (PsycINFO Database Record (c) 2010 APA, all rights reserved)