Examining the Relationship between Maternal and Child Behaviors on Literacy Activities and Resources Employed in the Home

The primary purpose of this study was to investigate the role of maternal (i.e., age, education, stress, depression, and self-efficacy) and toddler characteristics (i.e., temperament, dysregulation, and competence) on literacy activities and resources employed in the home. The current study was a secondary data analysis of a larger study assessing the role of infant/toddler, care, and family characteristics on preschoolers’ school readiness. Ninety-five mothers of toddlers (28 --- 31 months old) completed mailed questionnaires that assessed maternal depression, parenting stress, maternal self-efficacy, toddler self-regulation and temperament, and literacy activities. Instruments completed by mothers included the Center of Epidemiological Studies Depression Scale (CES-D), Parental Stress Index --- Short Form (PSI/SF), Infant and Toddler Social and Emotional Assessment (ITSEA), Self-Efficacy Parenting Task Index-Toddler Scale (SEPTI-TS), and questionnaires assessing interaction, literacy, and creativity activities. In a follow-up phone interview, mothers completed the Early Childhood Behavior Questionnaire (ECBQ) and provided demographic information. Bivariate correlations and hierarchical regression revealed gender differences in the factors related to literacy activities and resources for male and female toddlers. For boys, elevated levels of physiological dysregulation significantly predicted activities and resources. For girls, mothers’ age and self-efficacy, significantly predicted the amount of book reading materials and reading frequency to female toddlers compared to mothers of male toddlers

Cactus: Issues for Sustainable Simulation Software

The Cactus Framework is an open-source, modular, portable programming environment for the collaborative development and deployment of scientific applications using high-performance computing. Its roots reach back to 1996 at the National Center for Supercomputer Applications and the Albert Einstein Institute in Germany, where its development jumpstarted. Since then, the Cactus framework has witnessed major changes in hardware infrastructure as well as its own community. This paper describes its endurance through these past changes and, drawing upon lessons from its past, also discusses futureComment: submitted to the Workshop on Sustainable Software for Science: Practice and Experiences 201

Targeted: How Relevant Parties Position the Ethics of Online Demographic-Based Targeted Advertising

This thesis examines how relevant parties position the ethics of online demographic-based targeting to vulnerable populations. Relevant parties fell into four categories: professional organizations, government organizations, major platforms, and activist groups. As advertising technology has rapidly evolved, relevant parties are in a unique position to shape the ethics of new technologies like demographic-based targeting. Statements from relevant parties were collected and a thematic analysis was conducted to determine the varying stances taken by each relevant party. Five stances emerged from this analysis representing how relevant parties positioned the issue: supports non-discriminatory demographic-based targeting, supports consensual demographic-based targeting, supports legal demographic-based targeting, neutral stance, and opposes demographic-based targeting. The findings illustrated a need for an expanded ethical framework, a comprehensive definition of vulnerable populations, and a need for relevant parties to take responsibility for regulation

An Extensible Timing Infrastructure for Adaptive Large-scale Applications

Real-time access to accurate and reliable timing information is necessary to profile scientific applications, and crucial as simulations become increasingly complex, adaptive, and large-scale. The Cactus Framework provides flexible and extensible capabilities for timing information through a well designed infrastructure and timing API. Applications built with Cactus automatically gain access to built-in timers, such as gettimeofday and getrusage, system-specific hardware clocks, and high-level interfaces such as PAPI. We describe the Cactus timer interface, its motivation, and its implementation. We then demonstrate how this timing information can be used by an example scientific application to profile itself, and to dynamically adapt itself to a changing environment at run time

Close-limit approximation to neutron star collisions

We develop a close-limit approximation to the head-on collision of two neutron stars similar to that used to treat the merger of black hole binaries. This approximation can serve as a useful benchmark test for future fully non-linear studies. For neutron star binaries, the close-limit approximation involves assuming that the merged object can be approximated as a perturbed, stable neutron star during the ring-down phase of the coalescence. We introduce a prescription for the construction of initial data sets, discuss the physical plausibility of the various assumptions involved, and briefly investigate the character of the gravitational radiation produced during the merger. The numerical results show that several of the merged object’s fluid pulsation modes are excited to a significant level. © 1999 The American Physical Society