Heat and moisture promoted deterioration of raw silk estimated by amino acid analysis

Silks are amongst the most precious artifacts of our textile heritage. While most silk fabrics are made from degummed silk, some in collections, such as ancient Chinese Juan, are composed of raw or just partially degummed silk. Such silks with remnant sericin gum may require special consideration for their optimum preservation. Conservators and curators then need to know which of the silks in their collections are in this category, and what effect the sericin has on the ageing of silk fibres. In the study reported here, the artificial heat and moisture ageing of raw silk was investigated by means of amino acid analysis. Amongst various amino acid molar ratios, Asp/Gly proved a valuable indicator of residual sericin gum on aged silk. Measurement of the tyrosine content was also useful for gauging the conservation state of silk in some circumstances. The results of the amino acid analyses when combined with those for tensile tests suggested that sericin did not inhibit fibroin deterioration under the ageing conditions employed.     

Single mothers in a parent group

At theX Day Care Center, in a New York City suburb, there was a group of single mothers, some separated from their husbands, others never married, who were confused and who were unsure about what they had to offer their children without a husband and father. In some cases this resulted in the mothers' general low self-regard and defensive attitudes, misperceptions, and unavailability to the communications about the children that customarily took place between the day care staff members and the mothers.Kenneth Schwarz is a Psychologist in Pound Ridge, NY     

Developing the NAEP Content-Area Frameworks and Innovative Assessment Methods in the 1992 Assessments of Mathematics, Reading, and Writing

This article provides an overview of the consensus processes for the development of the frameworks underlying the NAEP assessments, with emphasis on those for the 1990 and 1992 assessments of mathematics, the 1992 assessment of reading, and the 1994 assessment of science. In addition, innovative assessment techniques included in the 1992 assessments of mathematics, reading, and writing are described, including use of mathematics tools, oral interviews, and portfolio assessment.     

Development of raw acceleration cut-points for wrist and hip accelerometers to assess sedentary behaviour and physical activity in 5–7-year-old children

ABSTRACT

This study validated sedentary behaviour (SB), moderate-to-vigorous physical activity (MVPA) and vigorous physical activity (VPA) accelerometer cut-points in 5–7-year-old children. Participants (n = 49, 55% girls) wore an ActiGraph GT9X accelerometer, recording data at 100 Hz downloaded in 1 s epochs, on both wrists and the right hip during a standardised protocol and recess. Cut-points were generated using ROC analysis with direct observation as a criterion. Subsequently, cut-points were optimised using Confidence intervals equivalency analysis and then cross-validated in a cross-validation group. SB cut-points were 36 mg (Sensitivity (Sn) = 79.8%, Specificity (Sp) = 56.8%) for non-dominant wrist, 39 mg (Sn = 75.4%, Sp = 70.2%) for dominant wrist and 20 mg (Sn = 78%, Sp = 50.1%) for hip. MVPA cut-points were 189 mg (Sn = 82.6%, Sp = 78%) for non-dominant wrist, 181 mg (Sn = 79.1%, Sp = 76%) for dominant wrist and 95 mg (Sn = 79.3%, Sp = 75.6%) for hip. VPA cut-points were 536 mg (Sn = 75.1%, Sp = 68.7%) for non-dominant wrist, 534 mg (Sn = 67.6%, Sp = 95.6%) for dominant wrist and 325 mg (Sn = 78.2%, Sp = 96.1%) for hip. All placements demonstrated adequate levels of accuracy for SB and PA assessment.     

Feasibility of Conducting Child Abuse Research with Girls in Juvenile Detention Using Audio-Computer Assisted Self-Interview (ACASI) Technology

This paper presents a feasibility study of audio computer-assisted self-interview (ACASI) technology used to elicit self-reported histories of child maltreatment among detained adolescent girls (N?=?35). We focus on methodological, legal, ethical, and administrative challenges to the collection of sensitive information from minors who are wards of the state. We conclude that extensive collaboration with detention center staff was required to address and overcome these challenges. Pending the availability of additional evidence from demographically diverse samples, the extent to which the ACASI method improves the completeness and accuracy of child maltreatment histories reported by adolescent girls in juvenile detention remains unclear. Further research is needed to determine whether the advantages of the ACASI technology contribute to more valid and reliable reporting of maltreatment by detained girls in a setting where an empathetic interviewer, who may facilitate the disclosure process, is absent.     

Fostering Third-Grade Students’ Use of Scientific Models with the Water Cycle: Elementary teachers’ conceptions and practices

Elementary teachers play a crucial role in supporting and scaffolding students’ model-based reasoning about natural phenomena, particularly complex systems such as the water cycle. However, little research exists to inform efforts in supporting elementary teachers’ learning to foster model-centered, science learning environments. To address this need, we conducted an exploratory multiple-case study using qualitative research methods to investigate six 3rd-grade teachers’ pedagogical reasoning and classroom instruction around modeling practices (construct, use, evaluate, and revise) and epistemic considerations of scientific modeling (generality/abstraction, evidence, mechanism, and audience). Study findings show that all teachers emphasized a subset of modeling practices—construction and use—and the epistemic consideration of generality/abstraction. There was observable consistency between teachers’ articulated conceptions of scientific modeling and their classroom practices. Results also show a subset of the teachers more strongly emphasized additional epistemic considerations and, as a result, better supported students to use models as sense-making tools as well as representations. These findings provide important evidence for developing elementary teacher supports to scaffold students’ engagement in scientific modeling.     

Work-family conflict and facilitation among teachers in Israel and Switzerland

In this paper, we examine the attitudes toward integrating work and family in a sample of 247 teachers in Switzerland and Israel. More particularly, we focus on the national context’s role in mediating the relations between professional and private spheres. The data were collected by a questionnaire implemented and administered in the two countries. The analysis reveals differences between Israeli and Swiss teachers regarding the importance of attribution to life roles and their attitudes toward conflict and facilitation. Findings suggest new insights into the consideration of cultural elements in shaping the teachers’ attitudes toward the integration of family and work.

     

LGBTQ student experiences in schools from 2009–2019: A systematic review of study characteristics and recommendations for prevention and intervention in school psychology journals

The present systematic review analyzes ways in which empirical studies in the field of school psychology have studied the experiences of lesbian, gay, bisexual, transgender, and queer (LGBTQ) students in the past decade (2009–2019). Results from 23 studies revealed an over-representation of quantitative studies conducted mostly in the United States and an over-representation of majority White, cisgender, and high school participants across studies. Results also showed that studies in the last decade have: (a) focused on exploring negative attitudes and behaviors toward LGBTQ students and the outcomes of these attitudes and behaviors, (b) provided direction on how to support LGBTQ students in schools, and (c) analyzed the effects of bystanders and perpetrators on the well-being of LGBTQ students. In addition, this review revealed ways in which studies in school psychology journals present prevention and intervention practices for creating a safe environment for LGBTQ students, including: (a) policies that focus on the inclusion and protection of LGBTQ students, (b) training for faculty and other school staff to promote LGBTQ students' safety, and (c) curriculum and extracurricular activities that address LGBTQ issues. We provide recommendations for improving the experiences of LGBTQ students in schools such as involving community stakeholders in drafting affirming policies.