Thin film ferroelectrics for capacitor applications

Pulsed laser deposition (PLD) has been used to fabricate simple thin film capacitor structures with a variety of ferroelectric materials. Thin film capacitors using the conventional ferroelectric material BaxSr1-xTiO3(BSTO) have been made across the entire compositional series. Electrical characterization shows that in thin film form these ferroelectrics display Curie point behaviour which is largely independent of composition. This contrasts sharply with bulk behaviour. The thin film fabrication and characterization of relaxor ferroelectric ceramics, such as Pb(Mg1/3Nb2/3)O3 (PMN) and Pb(Zn1/3Nb2/3)O3-BaTiO3(PZN-BT), is also reported. © 1998 Chapman & Hall     

Efficacy of self-examination therapy in the treatment of generalized anxiety disorder.

To determine the efficacy of self-examination therapy in the treatment of generalized anxiety disorder, 38 adults volunteered for a study in which they were randomly assigned to self-examination therapy or to a delayed-treatment group. Analyses indicated that participants in self-examination therapy had significantly fewer symptoms of anxiety than did participants in the delayed-treatment group on the outcome measures of this study, which included ratings by trained clinicians and participants. The reduction in anxiety for people receiving self-examination therapy was maintained 3 months after treatment ended. The delayed-treatment group also showed significant improvement in anxiety symptoms after receiving self-examination therapy. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Peer model and experimenter expectancies about appropriate response as determinants of behavior in the hypnotic setting.

Conducted 2 studies with undergraduates (N = 180) to analyze the behavioral effects of the variables "peer model behavior" and the "E's statement of his own expectancy" on the application of hypnosis. The 2 sources of social influence were established prior to induction of hypnosis. The sources were studied for their effects within the framework of a factorial design in which model and hypnotist expectancies about appropriate hypnotic response were manipulated simultaneously, in harmony and in opposition to each other. Exp I established the accuracy of the expectancy manipulations. Exp II analyzed the consequent effects of such manipulations and predicted a positive relationship between hypnotist-expectancy effect and Ss' susceptibility to hypnosis. As predicted, both variables effectively shaped Ss' hypnotic response. The level of susceptibility of Ss to hypnosis was significantly related to the strength of influence of the hypnotist's expressed expectancy. (20 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of therapist sex on the outcome of therapy.

Examines studies of the effects of therapist sex on the outcome of therapy. Most studies supported 1 of the following 3 viewpoints: Female therapists are more effective with both sexes of clients; matching therapist and client sex produces the greatest therapeutic benefit; therapist sex is a poor predictor of outcome in therapy. Strengths and weaknesses of these positions and some less commonly held views are discussed. Due to unimpressive statistical findings, conflicting evidence, and poor experimental control in prior research, it is cautiously concluded that a therapist's sex is a poor predictor of outcome in therapy. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

4-aminobiphenyl, 2-naphthylamine, and analogs: analytical properties and trace analysis in five substrates

Methods for monitoring trace levels of 4-aminobiphenyl, 2-naphthylamine, and their hydrochloride salts in waste water, microbiological growth media, potable water, human urine, and mouse blood utilizing spectrophotofluorometry (SPF) are described. The salient elements of the methods are extraction of the residues as the free amine with benzene, rapid cleanup on an alumina column, and quantification of the free amine in methanol via SPF. Potable water solutions of the salts are diluted with 0.01 N aqueous HCL and quantified directly by SPF. Ancillary analytical information concerning gas chromatography of the free amines, partitioning properties of the compounds between solvent pairs, their solubility and stability in water, and thin-layer chromatographic data is presented. The compositions of various admixtures of 1- and 2-naphthylamine or their salts were determined by using SPF with calculations based on simultaneous equations.     

Adsorption of chromate by clinoptilolite exchanged with various metal cations

Unmodified zeolite surfaces show no affinity for anions, due to the fact that zeolites are negatively charged. Thus, adsorption of anions by zeolites has not been given much attention. In this work, after modification of clinoptilolite by different cations, the mineral was found to adsorb a considerable amount of the divalent anion chromate. Chromate adsorption was proportional to the K(sp) of the chromate precipitate and the amount of the exchangeable cation. The amount of chromate adsorbed was maximized when the Pb-exchanged form was used. Chromate desorption in deionized water indicated that between 2.50% and 18.60% of the adsorbed chromate was released depending upon the exchangeable cation. Some of the exchanged forms are candidate materials for adsorption and immobilization of chromate.