Adolescent and family predictors of physical aggression, communication, and satisfaction in young adult couples: A prospective analysis.

This study tested a model wherein the family conflict, depression, and antisocial behavior of 254 adolescents (mean age?=?17 years; 63% female) are prospectively related to functioning within a marital (51 %) or dating relationship in young adulthood (mean age?=?23 years). Family aversive communication in adolescence and adolescent antisocial behavior predicted couple physical aggression. Family aversive communication predicted dyadic satisfaction and aversive couple communication for married women and dating men. Among those with partners who reported little antisocial behavior, adolescent antisocial behavior inversely predicted couple satisfaction and facilitative behavior. Partner antisocial behavior did not mediate the relation between adolescent characteristics and couple functioning. Findings emphasize the importance of the early family environment and psychopathology of the adolescent in the development of adaptive couple relationships. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Patterns of family functioning and adolescent outcomes among urban African American and Mexican American families.

The relations of patterns of family functioning, prosocial behaviors, and internalizing and externalizing symptoms over time were evaluated among a sample of economically disadvantaged inner-city African American and Mexican American male adolescents. Ethnic group differences for configurations of family functioning over time, levels of prosocial and problem behaviors, and relations of family functioning to risk were found. Among both ethnic groups, exceptionally functioning families provided a protective effect against risk. Overall, African American youth had stronger attitudes toward school and higher educational aspirations than Mexican American youth. Unlike previous investigations, once socioeconomic status was controlled, no differences were found for either internalizing or externalizing problems between the 2 groups. The importance of considering socioeconomic status and community context when evaluating minority parenting and family functioning is discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effect of phone design on upper extremity discomfort and muscle fatigue

OBJECTIVE: To compare a small cellular clamshell phone with a traditional office phone in the development of discomfort and muscle fatigue over time during phone use. BACKGROUND: Phone use involves low-level static exertions that may be influenced by phone design. Phone design and its interactions with anthropometry may change shoulder and hand postures assumed during use, which in turn may modify the length-strength relationship and moment arms of the muscles. METHOD: Ten adults participated in a study that simulated phone use using a small clamshell and a traditional office phone. Discomfort information and electromyographic (EMG) muscle activity were monitored on four upper extremity muscles. Discomfort and fatigue data (EMG median frequency shifts) were analyzed to assess differences between phones as well as differing effects attributable to anthropometry. RESULTS: Median frequency shifts supported discomfort claims and indicated muscle fatigue in the deltoid and thenar muscles. Biomechanical measures demonstrated that participants with short limb lengths developed more severe signs of thenar fatigue. Participants with longer arms developed greater discomfort in the neck, shoulder, and back. The deltoid confirmed this occurrence, showing signs of muscle fatigue. CONCLUSION: Phone design and anthropometry influenced the development of discomfort and fatigue during phone use. Phone design dictated grip style, resulting in differing discomfort and fatigue levels. Anthropometry influenced the severity of the discomfort and fatigue present in the shoulder and hand. APPLICATION: Use of small clamshell phones may contribute to a lack of rest and recovery from typical workday exposures. It should be explored from an ergonomic perspective.     

A Pace of Its Own: The Demography of Ageing in Sri Lanka

The process of demographic ageing in Sri Lanka is striking in comparison to the experience of other countries in South Asia, and in comparison to many developing countries more generally. The proportion of the population older than 60 years in Sri Lanka was much higher—almost double—than in any other country in the region in 2000, and by 2030, it is expected that nearly one of every five Sri Lankans will be elderly. The rapid ageing of the Sri Lankan population is contributing to the emergence of several policy issues that will undoubtedly become more acute in the years to come. The primary aim of this paper is to examine the magnitude, characteristics and determinants of demographic ageing in Sri Lanka, a country whose demography has received little international attention, and discuss some of the implications of this ageing process for selected policy issues.     

Using simulation‐based experiments for software requirements engineering

We describe the use of simulation‐based experiments to assess the computer support needs of automation supervisors in the United States Postal Service (USPS). Because of the high cost of the proposed system, the inability of supervisors to articulate their computer support needs, and the infeasibility of direct experimentation in the actual work environment, we used a simulation to study end‐user decision making, and to experiment with alternative computer support capabilities. In Phase One we investigated differences between expert and novice information search and decision strategies in the existing work environment. In Phase Two, we tested the impact of computer support features on performance. The empirical results of the two experiments showed how to differentially support experts and novices, and the effectiveness of proposed information systems before they were built. The paper concludes by examining the implications of the project for the software requirements engineering community.     

Multidimensional quantitative analysis of the Cuban scientific output and its regional context

Scientometrics - A multidimensional approach was applied to analyze trends of the Cuban scientific output in the context of the 21 Latin American countries exceeding two million inhabitants. Output...     

The rheological behaviour of concentrated dispersions of graphene oxide

The rheological behaviour of concentrated aqueous dispersions of graphene oxide (GO) was studied as a model system and then compared to those of GO in poly(methyl methacrylate) (PMMA). Dynamic and steady shear tests were conducted using a parallel plate rheometer. The aqueous system behaved as a reversibly flocculated dispersion with linear viscoelastic regions (LVR) extending up to strains of 10 %. Dynamic frequency sweeps conducted within the LVR showed a classic strong-gel spectrum for high concentrations. Under steady shear, the dispersions shear-thinned up to a Peclet number (Pe) <1, followed by a power law at higher Pe. The dispersions were thixotropic and recovered their structure after 60 min rest. The change in rheological properties of the PMMA upon the addition of the GO was less pronounced possibly due to the absence of hydrogen bonding; a relatively small increase in viscosity was found, which is encouraging for the melt processing of graphene composites.     

Memory and aging: The role of retrieval processes.

A review of the literature demonstrates that production deficiency hypotheses are unable to account fully for the fact that older adults perform more poorly on memory tasks than young adults. The possibility is explored that age-related differences are due to changes in fundamental processes involved in retrieval of information from memory, namely, (a) utilization of contextual information and (b) activation processes occurring in semantic memory. Automatic as well as intentional processes are examined. (5? p ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Factors, correlates, and problem areas affecting career decision making of a cross-sectional sample of students.

Examined the self-reported impact of 6 general factors affecting career decision making and specifically tested the validity of the Career Factor Checklist (CFC) developed from a model of the lst author et al (1978). 1,436 high school, undergraduate, and graduate students completed the CFC and reported the degree to which 6 general factors and 22 subfactors affected their career decision making. Results show that the CFC measured the 6 general career factors identified by the model. A significant grade main effect and Sex?×?Grade interactions were found for 4 of the 6 factors assessed. Implications are discussed for individual counseling and for preventive programming around the correlates in career decision making. (38 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)