Active Distributed RC-Filter Design

New active distributed RC-structures utilizing exponential RC-lines and operational amplifiers are proposed for realizing band-pass transfer functions and transfer functions having both a pair of complex poles and a pair of complex zeros. It is shown that the magnitude of the amplifier gain for a given pole Q decreases with increasing taper. In the case of the structures realizing both complex poles and zeros, it is shown that the sensitivity with respect to the gain of the pole-determining amplifier is considerably lower than that of the previously proposed structures.     

Helping youth in underserved communities envision possible futures: an extension of the Teaching Personal and Social Responsibility model

Empowering youth through the exploration of their possible futures is afresh and innovative approach to the Teaching Personal and Social Responsibility model (TPSR). The purpose of this study was to examine the combination of TPSR with the theory of possible selves. This combination, called the Career Club, was a program specifically designed to better assist students in understanding and facilitating reflective discussions on their future decisions. Career Club was taught weekly for nine sessions, 90 min each, at an inner city elementary school in a large metropolitan city. Participants comprised 12 seventh- and eighth-grade boys and girls who had at least 1 year and up to 5 years of experience in a TPSR program. Data sources included document analysis, lesson observations, formal interviews, and observationalfield notes. Themes were classified into the following categories: hoped- for-selves and feared selves-a delicate balance, coaching as a necessary component, and coming to understand possible futures. These results indicated that Career Club was effective in providing the participants a meaningful career exploration in coaching. Data also suggested these coaching experiences facilitated reflective discussions on realizing their future orientation choices.     

If You Haven't Been There, You Don't Know What It's Like: Doing Day Care

This article examines Sarason's (1995) political principle-“if you are going to be affected, directly or indirectly, by a policy, you should stand in some relationship to the decision making process”-in the work lives of teacher-caregivers in a day care center in a small Midwestern town. Based on ethnographic research, the article explores the face-to-face interactions of teacher-caregivers in the larger highly asymmetric and highly regulated relational system within which day care is situated. It concludes that they have little say in the decisions that affect their daily work lives.     

‘Keep Telling Until Someone Listens’: Understanding Prevention Concepts in Children’s Picture Books Dealing with Child Sexual Abuse

Children’s picture books dealing with the topic of child sexual abuse appeared in the 1980s with the aim of addressing the need for age-appropriate texts to teach sexual abuse prevention concepts and to provide support for young children who may be at risk of or have already experienced sexual abuse. Despite the apparent potential of children’s picture books to convey child sexual abuse prevention concepts, very few studies have addressed the topic of child sexual abuse in children’s literature. This article critically examines a selection of 15 picture books (published in the US, Canada and Australia) for children aged 3–8 years dealing with this theme. It makes use of an established set of evaluative criteria to conduct an audit of the books’ content and applies techniques of literary discourse analysis to explain how these picture books satisfy criteria for child sexual abuse prevention. The analysis is used as a way to understand the discourses available to readers, both adults and children, on the topic of child sexual abuse. Key themes in the books include children’s empowerment and agency, and the need for persistence and hope.     

Lesson Study with preservice teachers: Lessons from lessons

This article examines a 2-year process of integrating Lesson Study—a form of teacher-led professional development—into an introductory course on the principles of teaching for students majoring in early childhood education. The course is taught in conjunction with beginning practicum work in area schools. We describe obstacles, modifications, and outcomes as we adapted the Lesson-Study process to help preservice teachers pay closer attention to instructional strategies (such as questioning techniques, anticipating student responses, and how lesson flow affects student understanding), and become more comfortable with constructive criticism by focusing on the lesson plan rather than the teacher.     

Childbirth educators, doulas, nurses, and women respond to the six care practices for normal birth

This collection of commentaries by childbirth educators, doulas, a labor and delivery nurse, and a woman preparing for the birth of her second baby provide an overall response to all six of Lamaze International's care practice papers that promote normal birth: Labor Begins on Its Own; Freedom of Movement throughout Labor; Continuous Labor Support; No Routine Interventions; Non-Supine (e.g., Upright or Side-Lying) Positions for Birth; and No Separation of Mother and Baby with Unlimited Opportunity for Breastfeeding. Strategies for using the position papers to facilitate learning in childbirth classes and for helping expectant parents access and understand research are presented. The commentaries describe the value of the position papers as a catalyst for professional growth, a foundation for creating change, a way to encourage reflection among professionals and women planning for the births of their babies, and an inspiration for everyone who advocates normal birth.     

Modification of Children's Gender-Stereotyped Behavior

2 studies of 8- and 11- year-old children explored factors related to willingness $$. Study I assessed baseline gender prefernces and gender-reiatd cognitive flexibility. While older children were found to have greater congnitive flexibility, and older boys had more stereotyped preferences, such questionnaire measures were not highly predictive of gender-atraditional behavior. Study 2 explored the parameters of vicarious social reinforcement in the symbolic modeling of gender-atraditional behavior. Peer reinforcers were more effective with younger children and on child-oriented tasks, whereas adult reinforcers were more effective with older children and on adult-oriented gender tasks. Both studies found that considerably more atraditional behavior was elicited with male examiners, suggesting more attention needs to be paid to this variable. Possible mechanisms underlying this effect are discussed.     

Is parental involvement lower at larger schools?

Parents who volunteer, or who lobby for improvements in school quality, are generally seen as providing a school-wide public good. If so, straightforward public-good theory predicts that free-riding will reduce average involvement at larger schools. This study uses longitudinal data to follow families over time, as their children move from middle schools to high schools, thus netting out unobservable differences among families. Increases in school size result in significant reductions in parental involvement, although the magnitude of the effect is small. If parents experience a doubling in school size, they are 2 percentage points less likely to increase their contacts with the school, and 5 percentage points less likely to increase their volunteering. A continuous-treatment propensity-score method tests whether the results are driven by selection into treatment. The parental contact results are robust to this test, while the volunteer results are not. Also, there is some evidence that parents see their involvement as a substitute, rather than a complement, for perceived school quality.