EXTENDING THE VALIDITY OF THE FAMILY INVOLVEMENT QUESTIONNAIRE–SHORT FORM FOR CULTURALLY AND LINGUISTICALLY DIVERSE FAMILIES FROM LOW‐INCOME BACKGROUNDS

The construct validity of the Family Involvement Questionnaire–Short Form (FIQ‐SF) was examined in an independent sample of ethnically and linguistically diverse low‐income families (N = 498) enrolled in an urban Head Start program in the Southeast. A series of exploratory and confirmatory factor analyses replicated the three‐factor structure identified in initial validation studies with Northeast samples: home‐school conferencing, home‐based involvement, and school‐based involvement. Findings from multiple group confirmatory factor analyses provided evidence that the three‐factor structure was invariant across family ethnicity. multivariate analyses of variance also confirmed hypothesized mean differences on FIQ‐SF dimension scores across family demographic variables such as caregiver ethnicity, primary home language, caregiver education, employment, and marital status. Findings replicate and extend prior construct validity evidence to support the use of the FIQ‐SF by early childhood education programs such as Head Start serving diverse families from low‐income backgrounds. Implications for future research, practice, and policy applications in early childhood are discussed.     

Localized removal of layers of metal,polymer, or biomaterial by ultrasound cavitation bubbles

We present an ultrasonic device with the ability to locally remove deposited layers from a glass slide in a controlled and rapid manner. The cleaning takes place as the result of cavitating bubbles near the deposited layers and not due to acoustic streaming. The bubbles are ejected from air-filled cavities micromachined in a silicon surface, which, when vibrated ultrasonically at a frequency of 200 kHz, generate a stream of bubbles that travel to the layer deposited on an opposing glass slide. Depending on the pressure amplitude, the bubble clouds ejected from the micropits attain different shapes as a result of complex bubble interaction forces, leading to distinct shapes of the cleaned areas. We have determined the removal rates for several inorganic and organic materials and obtained an improved efficiency in cleaning when compared to conventional cleaning equipment. We also provide values of the force the bubbles are able to exert on an atomic force microscope tip.     

Teacher Child Contacts In Nursery Schools

The theoretical basis for the Analysis of Means Technique is discussed. In addition, a simplified working procedure is outlined, step-by-step for an actual problem. The data for the problem are analyzed by the analysis of means techniques, which compares differences between means instead of population variances estimates. The data are also analyzed by the analysis of variance technique. The conclusions reached by both techniques are the same. The graphical representation of the ANOM is helpful in understanding data. The ANOM technique is usually used in conjunction with the analysis of variance, either as an initial analysis of data or to augment the analysis of variance.     

A new generation of grey literature: The impact of advanced information technologies

A basic challenge of the Weinberg Report addressed the question of information overload. The Weinberg Panel was extremely concerned with the proliferation of scientific literature and the specific issue of how to sift through reams of data to find the “gems” of wisdom, or that which is truly new and useful. In the early 1960s when the report was being written, computers were not part of the information access and retrieval infrastructure. Writing twenty-five years later, in 1988, Dr. Weinberg recognized that the panel had not adequately taken into account the impact of the computer and the growth of the information industry. Today we have a new world of microcomputers and networked information which is fundamentally shifting the paradigm of scientific communication. We have new capabilities, including electronic publishing, visualization techniques, even virtual reality. Without getting into a great debate about the definition of “grey literature,” the main characteristics have traditionally been described as: rapid publication, wariable formats, no public peer review, and no commercial source of general availability. With networked information and multi-media technology, the new world of grey literature is emerging with an interesting set of new and revived challenges. This article looks at the most interesting characteristics, and based on them, presents the thesis that in the 1990s we are facing a new generation of “grey literature”.