Carbon based conductive photoresist

A conductive photoresist for photolithographic application was studied here. The negative near-UV sensitive epoxy-based photoresist was used as a polymer matrix and conductive carbon black was used as functional filler. DC electrical resistivity of composite as a function of filler concentration has a well-known S-shape. After UV-exposure the resistivity of the composite decreases for almost five orders of magnitude, mostly at percolation threshold (approx. 0.6 vol.%). This effect can be attributed to the fully cross-linked polymer structure formed during UV-exposure of the composite. The resistivity of prepared samples also depend on the state of dispersion of the functional filler obtained using different dispersing additives. Composites with better dispersed particles have lower resistivities. This effect remained below one order of magnitude and decreased after UV-exposure. The composites with carbon black concentration of up to 1.1 vol.% are suitable for spin-coating and photolithography.     

Complementary Tasks to Measure Working Memory in Distinct Prefrontal Cortex Subregions in Rats.

Acquisition of odor-guided or visually-guided delayed win-shift behavior was evaluated in rats after lidocaine-induced inactivation within the agranular insular area of the prefrontal cortex (PFC) or the prelimbic area of the PFC. Additional sites and tasks were used to control for neuroanatomical and behavioral specificity of lidocaine inactivation of the agranular insular and prelimbic areas. Results showed that acquisition of the odor-guided delayed win-shift task was dependent on the agranular insular area, whereas acquisition of the visually-guided version was dependent on the prelimbic area. This dissociation suggests that the stimulus modality used is critical for revealing working memory functions of different PFC subregions. The described methods provide a complementary means to study working memory in PFC subregions using a radial-arm maze. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

On the usefulness of quantitative safety goals for state regulation of energy systems

The potential usefulness of quantitative safety goals for energy systems in the State of California is evaluated. Five energy-related risk issues, previously dealt with by state regulatory agencies, are examined for the role played by risk in decision-making and the possible role that quantitative safety goals might have played. Several other energy-related risk situations are identified and briefly discussed. It is concluded that quantitative safety goals do not appear to be needed for risk management of energy systems in California. However, there does appear to be a role for a central office of risk management in the State governmental structure. Such an office would provide a reference and evaluation service for other agencies. The potential usefulness of establishing threshold levels of risk for different kinds of action is also noted.     

The role of inferior parietal and inferior frontal cortex in working memory.

Verbal working memory involves two major components: a phonological store that holds auditory-verbal information very briefly and an articulatory rehearsal process that allows that information to be refreshed and thus held longer in short-term memory (A. Baddeley, 1996, 2000; A. Baddeley & G. Hitch, 1974). In the current study, the authors tested two groups of patients who were chosen on the basis of their relatively focal lesions in the inferior parietal (IP) cortex or inferior frontal (IF) cortex. Patients were tested on a series of tasks that have been previously shown to tap phonological storage (span, auditory rhyming, and repetition) and articulatory rehearsal (visual rhyming and a 2-back task). As predicted, IP patients were disproportionately impaired on the span, rhyming, and repetition tasks and thus demonstrated a phonological storage deficit. IF patients, however, did not show impairment on these storage tasks but did exhibit impairment on the visual rhyming task, which requires articulatory rehearsal. These findings lend further support to the working memory model and provide evidence of the roles of IP and IF cortex in separable working memory processes. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Language deficits, localization, and grammar: Evidence for a distributive model of language breakdown in aphasic patients and neurologically intact individuals.

Selective deficits in aphasic patients' grammatical production and comprehension are often cited as evidence that syntactic processing is modular and localizable in discrete areas of the brain (e.g., Y. Grodzinsky, 2000). The authors review a large body of experimental evidence suggesting that morphosyntactic deficits can be observed in a number of aphasic and neurologically intact populations. They present new data showing that receptive agrammatism is found not only over a range of aphasic groups, but is also observed in neurologically intact individuals processing under stressful conditions. The authors suggest that these data are most compatible with a domain-general account of language, one that emphasizes the interaction of linguistic distributions with the properties of an associative processor working under normal or suboptimal conditions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Mother's insightfulness regarding their infants' internal experience: Relations with maternal sensitivity and infant attachment.

This study examined the associations among mothers' insightfulness into their infants' internal experience, mothers' sensitivity to their infants' signals, and infants' security of attachment to their mothers. The insightfulness of 129 mothers of 12-month-old infants was assessed by showing mothers 3 videotaped segments of observations of their infants and themselves and interviewing them regarding their infants' and their own thoughts and feelings. Interviews were classified into 1 insightful and 3 noninsightful categories. Mothers' sensitivity was assessed during play sessions at home and at the laboratory, and infant-mother attachment was assessed with the Strange Situation. Mothers classified as positively insightful were rated as more sensitive and were more likely to have securely attached children than were mothers not classified as positively insightful. Insightfulness also accounted for variance in attachment beyond the variance explained by maternal sensitivity. These findings add an important dimension to research on caregiving, suggesting that mothers' seeking of explanations for the motives underlying their infants' behavior is related to both maternal sensitivity and infant attachment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Will fifty cooks spoil the broth? The debate over entrusting Head Start to the states.

Many researchers and policymakers recognize the importance of preschool education, particularly for low-income children, and the role of state governments has become increasingly prominent in providing services. At the same time, some policy analysts have urged that Head Start should be shifted from federal to state control. Others, however, believe this is inadvisable. We sought to inform the debate over whether entrusting Head Start to the states would be a sound policy decision by examining extant state preschool programs. Our survey of 31 programs that matched our criteria suggested that state-funded initiatives vary widely in design, implementation, and quality. There are some common areas of strength and weakness: States tend to be strong in domains such as classroom quality, but are weak on providing comprehensive services. Overall, we find reason for serious concern regarding Head Start devolution from federal to state control at this time. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Pursuit and adjustment of goals during unemployment: The role of age.

This longitudinal study investigated the predictive value of 2 self-regulatory processes (goal pursuit and goal adjustment) on mental health and reemployment success over a period of 8 months. A total of 87 unemployed job seekers participated in this study. There is some evidence that age moderated the relationship between goal pursuit and goal adjustment with mental health and reemployment success. Contrary to expectations, goal pursuit was positively related to mental health for relatively older individuals. The authors found no effects of goal adjustment on mental health. However, as expected, goal adjustment had a negative relationship with reemployment success for relatively younger individuals. The authors found no moderator effects of age on the relationship between goal pursuit and reemployment success. Thus, the study revealed different relationships between self-regulatory processes and mental health as well as reemployment success for younger and older individuals. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Empirical and Conceptual Problems With Longitudinal Trait-State Models: Introducing a Trait-State-Occasion Model.

The latent trait-state-error model (TSE) and the latent state-trait model with autoregression (LST-AR) represent creative structural equation methods for examining the longitudinal structure of psychological constructs. Application of these models has been somewhat limited by empirical or conceptual problems. In the present study, Monte Carlo analysis revealed that TSE models tend to generate improper solutions when N is too small, when waves are too few, and when occasion factor stability is either too large or too small. Mathematical analysis of the LST-AR model revealed its limitation to constructs that become more highly auto-correlated over time. The trait-state-occasion model has fewer empirical problems than does the TSE model and is more broadly applicable than is the LST-AR model. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychological services to Spanish-speaking populations: A model curriculum for training competent professionals.

The competent delivery of mental health services to Spanish-speaking clients requires knowledge of Latino cultures, racial and ethnic identity development, variables that impact service delivery, and the Spanish language. We present the Psychological Services for Spanish Speaking Populations (PSSSP) program as a model for training mental health professionals to deliver services to Spanish-speaking clients. The goals for the program were to improve participants' oral and written Spanish language proficiency in work-related contexts and to improve multicultural competence in service delivery to Latino clients. Recommendations for those who wish to offer similar programs include (a) grouping trainees according to Spanish language proficiency, (b) using Spanish language instructors with expertise in teaching heritage language learners, and (c) developing criterion references or measures to assess program outcomes. (PsycINFO Database Record (c) 2011 APA, all rights reserved)