Identification of natural dyes in historical textiles from Romanian collections by LC-DAD and LC-MS (single stage and tandem MS)

In this study, the dyes present in five 17th- to 18th-century textiles from the National Museum of Art of Romania, three religious embroideries and two brocaded velvets, are characterized and discussed, together with earlier results on textiles from Romanian collections obtained by the same research group. Dye analyses were performed using two methods: the well-established liquid chromatography-diode array detection (LC–DAD) and a recently developed liquid chromatography-mass spectrometry (LC–MS) analytical protocol. The examination of very small historical samples by both techniques allows a better insight in the advantages and limitations of the two approaches to real analyses to be obtained. LC–MS data interpretation is based entirely on the results accumulated for dye standards. Electrospray ionization (ESI) was used in the negative ion mode and an ion trap served as mass analyzer. Both single stage (MS) and tandem (MS/MS) mass spectrometric approaches were considered. The dyes and natural sources identified by both analytical techniques are discussed in the historical context of the textiles, with respect to earlier results collected for similar Romanian objects. The study showed that the dye sources found in the 17th- and 18th-century Romanian velvets and embroideries were produced using a wide variety of dye sources, suggesting influences from Europe as well as from Asia Minor. Dye sources imported from New World have been also detected. The range of biological sources is in very good correspondence with earlier results obtained from textiles in the Romanian Collections. LC-MS (single stage and tandem MS) approaches have been demonstrated to be valuable tools for dye identification in small-scaled samples from historical textile objects only if sufficient knowledge on the dyes and their biological sources is first accumulated within experiments performed on standard dyes and standard dyed fibers.     

Explicit Theory of Mind Is Even More Unified Than Previously Assumed: Belief Ascription and Understanding Aspectuality Emerge Together in Development

Existing evidence suggests that children, when they first pass standard theory‐of‐mind tasks, still fail to understand the essential aspectuality of beliefs and other propositional attitudes: such attitudes refer to objects only under specific aspects. Oedipus, for example, believes Yocaste (his mother) is beautiful, but this does not imply that he believes his mother is beautiful. In three experiments, 3‐ to 6‐year‐olds' (N = 119) understanding of aspectuality was tested with a novel, radically simplified task. In contrast to all previous findings, this task was as difficult as and highly correlated with a standard false belief task. This suggests that a conceptual capacity more unified than previously assumed emerges around ages 4–5, a full‐fledged metarepresentational scheme of propositional attitudes.     

Digital technologies for promoting “student voice” and co-creating learning experience in an academic course

“Student voice” (SV) refers to listening to and valuing students’ views regarding their learning experiences, as well as treating them as equal partners in the evaluation process. This is expected, in turn, to empower students to take a more active role in shaping their learning. This study explores the role played by digital technologies in creating a space for SV in academia. The qualitative study was conducted in an academic course, which combines face-to face, synchronous lessons with a variety of asynchronous self-directed and group learning activities. The participants were 54 Master’s students in education. We analyzed the pedagogical design of the course, as well as interpretations of teaching, learning, assessment, and the role of technology as experienced and presented by the students. The findings demonstrated that students functioned as co-designers of the course content, co-creators of teaching and of their own learning experience. Students perceived the requirements of active learning, teamwork, and community participation (i.e., an advanced way of conveying SV—leadership; Mitra International handbook of student experience in elementary and secondary school, Springer Publishers, The Netherlands, 2007), as both challenges related to overload and stress, and benefits related to the gains of meaningful learning, innovative pedagogical design, and diverse instructional methods. The equalization effect of the digital environment, which diminishes status cues changed the power dynamic, promoted students’ active participation and their pedagogical partnership with the instructor. Based on the findings, our conceptualization of SV and its implications for academia includes: (1) co-design of content, (2) co-teaching, (3) co-creation of learning experience and outcomes, and (4) embedded co-assessment for learning.     

Technological,pedagogical and content knowledge in one-to-one classroom: teachers developing “digital wisdom”

One-to-one (1X1) laptop initiatives become prevalent in schools aiming to enhance active learning and assist students in developing twenty-first-century skills. This paper reports a qualitative investigation of all 7th graders and their 15 teachers in a junior high-school in Northern Israel gradually implementing 1X1 model. The research was conducted during a second year of 1X1 implementation at the school level, which was a first year of teaching and learning with laptops for all study participants. The study triangulates non-participant lessons’ observations and semi-structured interviews with 15 teachers. The data were collected twice: at the beginning and toward the end of the 2011–2012 academic year – in total, 30 observations and 30 interviews were conducted. The results were examined through phenomenological research techniques and discussed in terms of the technological, pedagogical and content knowledge (TPACK) and “digital wisdom” approaches. The teachers showed significant increase of technological knowledge. However, only moderate connections between technology and pedagogy as well as between technology and content were found. Some of the teachers functioned as moderators, scaffolding students and supporting their individual or collaborative learning. However, many teachers struggled with effective management of 1X1 classroom. Neither conjunction of teacher TPACK nor facilitation of student digital skills was observed. The paper suggests an overlap of the TPACK framework and the digital wisdom approach and provides implications for curriculum developers and educational policy-makers.     

How important is it to my parents? Transmission of STEM academic values: the role of parents’ values and practices and children’s perceptions of parental influences

The success of science education in classroom and out-of-school settings can be influenced by parents’ behaviours and STEM-related values. The present study investigated pathways in parent-to-child transmission of STEM (science, technology, engineering, mathematics) values by examining at same time parents’ values and behaviours, along with their children’s perceptions of these parental influences. The study included 1071 students (M_age?=?12.15) and the same number of their parents. Path analysis revealed that children’s importance value of the STEM school fields was best explained by their perceptions of parental values and behaviours in STEM. On the other hand, parents’ self-reported values and behaviours had a weak effect in predicting children’s values, which can be explained by inaccurate children’s perceptions of their parents. The results suggest that parents more easily convey beliefs about the utility than the attainment value of STEM. Namely, parents’ utility value had a larger effect in predicting children’s value, partly mediated through children’s perception of parents’ encouragement of STEM interests. The study highlights the role of children’s perceptions of their parents’ beliefs and behaviours and the importance of communicating STEM-related values within the family. Practical implications for parents and science educators are discussed.     

Crosschecking teachers’ perspectives on learning in a one-to-one environment with their actual classroom behavior – a longitudinal study

Education and Information Technologies - One-to-one laptop initiatives have become prevalent in schools aiming to enhance active learning and assist students in developing twenty-first-century...     

#1: labor begins on its own

In this position paper-one of six care practice papers published by Lamaze International and reprinted here with permission-the benefit of allowing labor to begin on its own is discussed and presented as an evidence-based practice that helps promote, protect, and support normal birth. The paper is written for childbearing women and their families. The accompanying commentary-written by a leading home-birth midwife and prominent national and international speaker on maternity care-describes further evidence of the disadvantages of inducing labor. The indications for and risks of induction are also explored. Lamaze International recommends that, unless there is a medical indication for induction, labor should be allowed to begin on its own.