Integrated psychological services in the Greeley-Evans public schools.

Integrated school psychological services were implemented 12 years ago in the Greeley-Evans Public Schools by combining the positions of school psychologist and school social worker and placing each professional in an elementary school full-time. After 5 years, services were expanded to secondary schools such that all schools had a full-time school psychologist. Using Bennett's (1988) model for the evaluation of alternative services to determine success in meeting stated goals, a number of positive outcomes were achieved. A time-use survey indicated increased involvement with a variety of interventions for school psychologists. The results of a consumer satisfaction questionnaire given to teachers, administrators, and support personnel also suggested positive perceptions of the new role. Additionally, placement of students with significant emotional disturbance decreased over this time period relative to a 34% student enrollment increase. It is hoped that the long-term implementation of an alternative school psychological services model such as this one will encourage others to enact ecologically responsive services relative to their unique systems. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The influence of linguistic experience on the cognitive processing of pitch in speech and nonspeech sounds.

In the present experiment, the authors tested Mandarin and English listeners on a range of auditory tasks to investigate whether long-term linguistic experience influences the cognitive processing of nonspeech sounds. As expected, Mandarin listeners identified Mandarin tones significantly more accurately than English listeners; however, performance did not differ across the listener groups on a pitch discrimination task requiring fine-grained discrimination of simple nonspeech sounds. The crucial finding was that cross-language differences emerged on a nonspeech pitch contour identification task: The Mandarin listeners more often misidentified flat and falling pitch contours than the English listeners in a manner that could be related to specific features of the sound structure of Mandarin, which suggests that the effect of linguistic experience extends to nonspeech processing under certain stimulus and task conditions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Atmospheric water vapor retrieval by means of both a GPS networkand a microwave radiometer during an experimental campaign in Cagliari,Italy, in 1999

Considers the remote sensing of atmospheric integrated precipitable water vapor (IPWV) using a Global Positioning System (GPS) network in the Mediterranean area during the whole year 1999. The assessment of IPWV retrieval has been carried out by means of an experimental campaign conducted in the proximity of the city of Cagliari, Italy, located on the southern coast of Sardinia in the Mediterranean Sea. The authors have compared GPS estimates with co-located measurements from a microwave dual-channel water vapor radiometer (WVR) collected in nonprecipitating conditions and with observations from radiosondes released four times a day from the Cagliari-Elmas Airport, approximately 15 km away from the GPS and WVR site. The long-term comparison has shown a fairly good agreement among the two remote sensors and the radiosonde observations, with a higher correlation between GPS and WVR     

Shyness and symptoms of illness in young children.

Investigated the association between shyness and symptoms of illness in young children and the types of symptoms differentiating shy and nonshy children. 16 shy children and 16 nonshy children (mean age 7 yrs 3 mo) were matched on sex, parental education, familial stress, and height-weight ratio. For 4 wks, parents recorded their children's health complaints and their own observations and conclusions of their children's health. There were more days on which shy children complained of unwellness and parents observed symptoms of unwellness than for nonshy children. Shy children made more affective complaints and were observed to experience more gastrointestinal upset. Several interpretations of the results are presented including the possibilities that lower thresholds for arousal in the hypothalamic-pituitary-adrenal axes of shy children affected their immunocompetence, that parents of shy children and the children themselves were more sensitive to symptoms of illness, and that feeling unwell may contribute to shy behaviour. Results suggest that the health of shy children merits further study. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Multicriteria maximum likelihood neural network approach to positron emission tomography

The emerging technology of positron emission image reconstruction is introduced in this paper as a multicriteria optimization problem. We show how selected families of objective functions may be used to reconstruct positron emission images. We develop a novel neural network approach to positron emission imaging problems. We also studied the most frequently used image reconstruction methods, namely, maximum likelihood under the framework of single performance criterion optimization. Finally, we introduced some of the results obtained by various reconstruction algorithms using computer‐generated noisy projection data from a chest phantom and real positron emission tomography (PET) scanner data. Comparison of the reconstructed images indicated that the multicriteria optimization method gave the best in error, smoothness (suppression of noise), gray value resolution, and ghost‐free images. © 2001 John Wiley & Sons, Inc. Int J Imaging Syst Technol 11, 361–364, 2000     

Field demonstration of successful bioaugmentation to achieve dechlorination of tetrachloroethene to ethene

A laboratory microcosm study and a pilot scale field test were conducted to evaluate biostimulation and bioaugmentation to dechlorinate tetrachloroethene (PCE) to ethene at Kelly Air Force Base. The site groundwater contained about 1 mg/L of PCE and lower amounts of trichloroethene (TCE) and cis-1,2-dichloroethene (cDCE). Laboratory microcosms inoculated with soil and groundwater from the site exhibited partial dechlorination of TCE to cDCE when amended with lactate or methanol. Following the addition of a dechlorinating enrichment culture, KB-1, the chlorinated ethenes in the microcosms were completely converted to ethene. The KB-1 culture is a natural dechlorinating microbial consortium that contains phylogenetic relatives of Dehalococcoides ethenogenes. The ability of KB-1 to stimulate biodegradation of chlorinated ethenes in situ was explored using a closed loop recirculation cell with a pore volume of approximately 64,000 L The pilot test area (PTA) groundwater was first amended with methanol and acetate to establish reducing conditions. Under these conditions, dechlorination of PCE to cDCE was observed. Thirteen liters of the KB-1 culture were then injected into the subsurface. Within 200 days, the concentrations of PCE, TCE, and cis-1,2-DCE within the PTA were all below 5 microg/L, and ethene production accounted for the observed mass loss. The maximum rates of dechlorination estimated from field date were rapid (half-lives of a few hours). Throughout the pilot test period, groundwater samples were assayed for the presence of Dehalococcoides using both a Dehalococcoides-specific PCR assay and 16S rDNA sequence information. The sequences detected in the PTA after bioaugmentation were specific to the Dehalococcoides species in the KB-1 culture. These sequences were observed to progressively increase in abundance and spread downgradient within the PTA. These results confirm that organisms in the KB-1 culture populated the PTA aquifer and contributed to the stimulation of dechlorination beyond cDCE to ethene.     

Task-specific ionic liquids incorporating novel cations for the coordination and extraction of Hg2+ and Cd2+: synthesis,characterization, and extraction studies

A series of hydrophobic task-specific ionic liquids designed to extract Hg2+ and Cd2+ from water were prepared by appending urea-, thiourea-, and thioether-substituted alkyl groups to imidazoles and combining the resulting cationic species with PF6-. The new ionic liquids were characterized and investigated for their metal ion extraction capabilities. When used in liquid/liquid extraction of Hg2+ and Cd2+ from aqueous solutions, the metal ion distribution ratios increased several orders of magnitude, regardless of whether the ionic liquids were used as the sole extracting phase or doped into a series of [1-alkyl-3-methylimidazolium][PF6] (alkyl = n-C4-C8) ionic liquids to form a 1:1 solution. In the 1:1 mixtures, as the length of the alkyl chain increased from butyl to hexyl to octyl, the metal ion distribution ratios increased. Increasing the ratio TSIL/[C4mim][PF6] resulted in higher distribution ratios for both Hg2+ and Cd2+. Overall, the thiourea- and urea-derivatized cations yielded the highest distribution ratios, and those for Hg2+ were higher than those for Cd2+; however, a change in aqueous-phase pH does not promote the stripping of metal ions from the extracting phase. The combination of these imidazolium cations and PF6- produced ionic liquids with decreased thermal stability in comparison to [C(n)mim]-[PF6]. Gaussian98 restricted Hartree-Fock geometry optimizations for one of the thiourea-appended cations shows the charge delocalization around the ring and suggests that the thiourea group may aid in deprotonating the imidazolium ring and may be responsible for the lowered thermal stability of these cations.