Physical modelling and scale effects of air-water flows on stepped spillways

INTRODUCTION The stepped channel design has been used fomore than 3500 years. Greek and Minoan engineerswere probably the first to design an overflow steppedweir and stepped storm waterways respectively(Chanson, 2001). Later, Roman, Moslem, Mughaand Spanish designers used a similar technique. Thesteps increase significantly the rate of energy dissipation taking place on the channel face, reducing thesize of the required downstream energy dissipationand the risks of scouring. Rec…     

NASA-TLX for predictability and measurability of instructional design models: case study in design methods

Educational technology research and development - Innovation projects has established as an emerging field of research, a number of issues have emerged; among the others, measurability and...     

A NATIONAL INVESTIGATION OF SCHOOL PSYCHOLOGY TRAINERS’ ATTITUDES AND BELIEFS ABOUT EVIDENCE‐BASED PRACTICES

The present investigation examined 460 school psychology trainers’ attitudes and beliefs about the conditions for the education and training of evidence‐based practices (i.e., assessments and interventions) in training programs in the United States and Canada using an online survey. Trainer attitudes and beliefs about education and training in evidence‐based practices were measured using a 24‐item five‐point Likert scale. Overall, trainers had positive views of evidence‐based practices, as well as program and organizational support for such training. However, trainers rated the education and training of evidence‐based assessments more favorably than evidence‐based interventions. In general, trainer characteristics nor program accreditation status, model, or type of degree offered were found to influence trainers’ perceptions about evidence‐based practices. However, trainers with prior experience teaching evidence‐based intervention courses were found to have more supportive views of evidence‐based assessments and interventions than those without such experience. Implications for future training and school practice are discussed.     

The Effects of Content-Enriched Shared Book Reading Versus Vocabulary-Only Discussions on the Vocabulary Outcomes of Preschool Dual Language Learners

Research Findings: This study compared the effects of content-based shared book-reading instruction versus an explicit vocabulary-only condition on the vocabulary development of preschool dual language learners (DLLs). Using shared book reading as the mode of instruction, we randomly assigned 48 bilingual preschool teachers and 281 Spanish-speaking DLLs from their classrooms at the class level to either a content-enriched interactive book-reading intervention or a thematic content-related vocabulary-only condition. Screened using the preLAS^®, the DLLs were selected for the study based on their scores at the prefunctional and beginning levels of English proficiency. Intervention and comparison bilingual teachers implemented the assigned instructional approach in small groups, for 20 min daily, for 18 weeks. Based on the results of multilevel models, findings indicated pre- to posttest growth on taught words for each instructional condition, with no significant effects on standardized English language measures. Practice or Policy: Results suggest that preschool DLL children benefit from the systematic use of interactive content-enriched shared book-reading vocabulary instruction or direct teaching of content vocabulary when instruction integrates language interaction opportunities with higher cognitive talk and scaffolds. The vocabulary-only routine is a cost-effective approach but may not replace the broader benefits of reading books.     

Psychosocial Aspects of the Development of Gifted Underachievers: Review and Implications

Gifted underachievers are children who display a discrepancy between expected high achievement and actual performance. Focussing on gifted children with a long‐standing pattern of underachievement not explicable in terms of learning disability, this paper adopts a developmental perspective to the problem of gifted underachievement. Literature is reviewed on the affective development of gifted underachievers and the environmental factors which may foster or diminish success in school. It is argued that cognitive and affective variables do not operate independently and should not be considered in isolation from the environmental context of development. Further, gifted underachievers are not a homogeneous group, and some influences on achievement are situation‐specific and highly variable. Finally, implications for intervention are discussed in light of the need to view children's development not as a dichotomy of cognitive and affective change but holistically, as a complex interaction of child and environment.     

Metacognitive regulation contributes to digital text comprehension in E-learning

Metacognition and Learning - This study examined the contribution of self-reported metacognitive regulation of reading to expository digital text comprehension in an e-learning environment,...     

Low-Income Central American Immigrant Mothers' Goals and Their Children's Classroom Competencies in Preschool

Research Findings: Unlike other Latino groups, there is little information about the early socialization of children from Central American (CA) immigrant families. This study examined CA immigrant mothers' short-term goals and the implications of these goals for children's behavior in preschool. A total of 47 low-income mothers described their goals for their children's behavior at home/with family and at school. Nearly all mothers described relatedness-oriented goals for their children at home and at school. Mothers emphasized autonomy-oriented goals predominantly for the school context. Mothers' emphases on certain goals in the home, but not goals for school, predicted teacher reports of children's social cooperation and approaches to learning in the classroom. Practice or Policy: Educators should be aware that relatedness-oriented goals are highly salient for CA immigrant parents. Immigrant parents might benefit from more information regarding the general goals of preschool. Educators should encourage mothers to set multiple early goals for their children, including learning-related goals for home. Educators and CA immigrant parents may support home–school continuity for children through mutual understanding of goals and values.     

Care taker blogs in caregiver fabricated illness in a child: A window on the caretaker's thinking?

Three recently diagnosed cases of caregiver-fabricated illness in a child at Seattle Children's Hospital shed light on a new manifestation of their caretakers’ attention seeking. The patients’ mothers were actively blogging about their children's reputed illnesses. Although it is not uncommon for parents of chronically ill children to blog about their child's medical course, specific themes in these blogs of parents suspected of medically abusing their children were noted. In particular, gross distortions of the information parents had received from medical providers were presented online, describing an escalation of the severity of their children's illnesses. The mothers reported contacting palliative care teams and Wish organizations, independently from their medical providers’ recommendations. They sought on-line donations for their children's health needs. We believe these blogs provide additional direct evidence of the suspected caregivers’ fabrications. Although we have not performed formal content analysis, blogs might also provide insight into the caretakers’ motivations. Protective Services and/or police investigators could consider querying the internet for blogs related to children at risk for caregiver-fabricated illness in a child. These blogs, if viewed in parallel with the children's medical records, could assist medical diagnosis and legal documentation of medical fabrication and assist in protective planning for the affected children.