Exploring an SEL program's effects on student attendance and academic learning.

In this study, we investigated the effect of the Positive Behavior Skills (PBS) program on students' attendance and academic learning. We used propensity score matching and growth modeling to compare PBS and non-PBS schools on (a) English language art (ELA), (b) mathematics, and (c) attendance. PBS schools had statistically significantly higher annual growth rate in attendance than the matched non-PBS schools, with PBS schools growing 0.38% points higher. Due to the word limit, the results for the other two school outcomes (ELA, mathematics) were not presented. Implications of the study were discussed given the nature of PBS program and general context of the literature.

[A system for testing alternating frequency properties of body fluid and tissues].

The electric properties of biotic tissues are of importance to our understanding biotic substances even life. But the measurement taken in this aspect is different from the measurement of ordinary materials, we need a special testing instrument for living substances. In order to understand the alternating frequency properties of body fluid and tissues in detail, we have developed an electricity characteristic testing system, which is more proper for testing living substances. This system adopts advanced measuring method and expert circuit. As the measure and the control core, the single chip processor is used. This system has wide frequency range and wide impedance testing range, much more adapted objects, and it is dependable, more precise and intelligent. The application of this system in practical testing has obtained optimal results.