Seeking Nettle Textiles – Utilizing a Combination of Microscopic Methods for Fibre Identification

Bast fibres have been commonly used as a textile material in Northern Europe since Neolithic times. However, the process of identifying the different species has been problematic, and many important questions related to their cultural history are still unanswered. For example, a modified Herzog test and the presence of calcium oxalate crystals have both been used in identification. In order to generate more reliable results, further research and advancement in multi-methodological methods is required. This paper introduces a combination of methods which can be used to identify and distinguish flax (Linum usitatissimum), hemp (Cannabis sativa), and stinging nettle (Urtica dioica). The research material consisted of reference fibres and 25 fibre samples obtained from 12 textiles assumed to be made of nettle. The textiles were from the Finno-Ugric and Historical Collections of The National Museum of Finland. The fibre samples were studied by observing the surface characteristics and cross sections with transmitted light microscopy, and by using a modified Herzog test with polarized light, in order to identify the distinguishable features in their morphological structures. The study showed that five out of 25 samples were cotton, 16 nettle, one flax, and one hemp. Findings from two samples were inconsistent. The results show that it is possible to distinguish common north European bast fibres from each other by using a combination of microscopic methods. Furthermore, by utilizing these combined methods, new and more reliable information could be obtained from historical ethnographic textiles, which creates new vistas for the interpretation of their cultural history.     

Behavioral Regulatory Problems Are Associated With a Lower Attentional Bias to Fearful Faces During Infancy

To investigate the role of early regulatory problems (RP), such as problems in feeding, sleeping, and calming down during later development, the association between parent-reported RP at 3 months (no-RP, n = 110; RP, n = 66) and attention to emotional faces at 8 months was studied. Eight-month-old infants had a strong tendency to look at faces and to specifically fearful faces, and the individual variance in this tendency was assessed with eye tracking using a face-distractor paradigm. The early RPs were related to a lower attention bias to fearful faces compared to happy and neutral faces after controlling for temperamental negative affectivity. This suggests that early RPs are related to the processing of emotional information later during infancy.     

The roles of teacher–student relationship quality and self-concept of ability in adolescents’ achievement emotions: temperament as a moderator

This study examined to what extent teacher–student conflict and closeness, on the one hand, and students’ self-concepts of ability in literacy and mathematics, on the other, are related to students’ achievement emotions (enjoyment, anxiety and boredom) in mathematics and literacy among Finnish early adolescents (N = 854). We also investigated the extent to which these associations are moderated by student temperament (surgency/extraversion, negative affectivity and effortful control). The results showed, after accounting for relevant covariates, that in both school subjects, teacher–student conflict was negatively related to enjoyment and positively to anxiety and boredom, whereas teacher–student closeness was positively related to enjoyment and negatively to boredom. Self-concepts of ability in both school subjects were positively related to enjoyment and negatively to anxiety, whereas the self-concept of ability was only negatively related to boredom in mathematics. Student temperament also moderated some of the associations in the literacy domain. Lower levels of conflict in the teacher–student relationship were related to higher levels of enjoyment in literacy, particularly among students who had lower levels of surgency/extraversion. Also, a closer relationship with the teacher or a lower self-concept of ability in literacy was related to higher levels of anxiety, particularly among students who had low effortful control. In the mathematics domain, the associations between the self-concept of ability and achievement emotions were somewhat stronger than in literacy, and the domain-specific associations were not dependent on student temperament.

     

Task‐focused behaviour and literacy development: a reciprocal relationship

The purpose of this study was twofold: (a) to examine the effect of task‐focused behaviour on reading fluency, spelling and comprehension; and (b) to examine the role of the different literacy skills in subsequent task‐focused behaviour. Two hundred and seven Finnish‐speaking children were followed from preschool until their fourth year at school and were tested for reading fluency, spelling and reading comprehension. The teachers also rated the children's task‐focused behaviour. The results showed that task‐focused behaviour was a significant predictor of later reading comprehension and spelling skills. However, all three literacy skills predicted subsequent task‐focused behaviour.     

Children's Temperament and Academic Skill Development During First Grade: Teachers' Interaction Styles as Mediators

The present study followed 156 Finnish children (M_age = 7.25 years) during the first grade of primary school to examine to what extent parent‐ and teacher‐rated temperament impacts children's math and reading skill development during the first grade, and the extent to which this impact would be mediated by teachers' interaction styles with the children. The results showed that the impact of children's low task orientation and negative emotionality on their math skill development was mediated via teachers' behavioral control and, among girls, also by psychological control. The negative impact of children's inhibition on math skill development, in turn, was not mediated via teachers' interaction styles. Temperament did not predict the children's reading skill development during first grade.     

Infants' Ability to Draw Inferences about Nonobvious Object Properties: Evidence from Exploratory Play

Generalizing knowledge about nonobvious object properties often involves inductive inference. For example, having discovered that a particular object can float, we may infer that other objects of similar appearance likewise float. In this research, exploratory play served as a window on early inductive capability. In the first study, 48 infants between 9 and 16 months explored pairs of novel toys in 2 test conditions: violated expectation (two similar toys were presented in sequence, the first toy produced an interesting nonobvious property, such as a distinctive sound or movement, while the second toy was invisibly altered such that it failed to produce the nonobvious property available in the first toy), and interest control (two similar-looking toys were presented in sequence, neither of which produced the interesting property). Infants quickly and persistently attempted to reproduce the interesting property when exploring the second toy of the violated expectation condition relative to the first toy of the interest control condition (a baseline estimate) or the second toy of the interest control condition (an estimate of simple disinterest). The second study, with 40 9–16-month-olds, confirmed these results and also indicated a degree of discrimination on infants' part: Infants seldom expected toys of radically different appearance to possess the same nonobvious property. The findings indicate that infants as young as 9 months can draw simple inferences about nonobvious object properties after only brief experience with just 1 exemplar.     

Principled Improvement in Science: Forces and proportional relations in early secondary-school teaching

In response to continuing concerns about student attainment and participation in science and mathematics, the epiSTEMe project took a novel approach to pedagogy in these two disciplines. Using principles identified as effective in the research literature (and combining these in a fashion not previously attempted), the project developed topic modules for early secondary-school teaching in the UK, arranged for their implementation in classrooms, and evaluated the results. This paper reports the development, implementation, and evaluation of one of the epiSTEMe science modules. Entitled Forces and Proportional Relations, the module covers standard curricular material in the domain of forces, while paying particular attention to the proportional nature of many key constructs. It was developed in collaboration with a small group of teachers; implemented subsequently in 16 classrooms, in all cases involving students from the first year of secondary school; and evaluated through comparison with first-year students in 13 control classrooms who were studying the topic using established methods. Evaluation addressed topic mastery and opinions about the topic and the manner in which it was taught. While further research is required before definite conclusions are warranted, results relating to topic mastery provide grounds for optimism about the epiSTEMe approach. Furthermore, student opinions about the module were positive.     

Effects of nicotinamide adenine dinucleotide hydride on physical and mental performance

Abstract

The aim of this study was to assess the effects of nicotinamide adenine dinucleotide hydride (NADH) on maximal oxygen uptake ([Vdot]O_2max), maximal anaerobic running time, and mental performance. Eight men were exposed to a supplement treatment (30 mg NADH as ENACHI tablets per day) and to a placebo treatment, each of 4 weeks' duration, in a balanced, double-blind, and cross-over design. The two treatments were separated by a 14-week wash-out period. The results indicated that [Vdot]O_2max, maximal anaerobic running time, and the ability to concentrate were similar in the NADH and placebo conditions. There were also no differences in blood lactate, creatine kinase, reaction time or feelings of fatigue between the treatments. A counter-movement jump performed at rest and 2 min after the aerobic test differed significantly (P ≤ 0.05) between the treatment conditions and was higher in the NADH group. In conclusion, the NADH supplementation for 4 weeks had no effects on [Vdot]O_2max, maximal anaerobic running time or mental performance.     

Children writing ethnography: children's perspectives and nomadic thinking in researching school classrooms

This article makes a connection between narrative ethnography, childhood studies and new materialist theories in studying children's perspective on school. It presents ‘children writing ethnography’ as an approach based on complexity and involving participatory research. The question of ‘what is happening in the classroom’ is explored through writings produced in class by 10-year olds. The ‘messy’ ethnographic data are examined within the framework of narrative ethnography using the idea of ‘small stories’ that capture everyday interaction. Furthermore, both material and embodied meanings in the writings are discussed. New materialist theories and the idea of nomadic make it possible to account for the connectivity between the writings, the classroom reality, the child-ethnographers and the research, which are seen as mutually producing one another. The author suggests that engaging with children's free-flowing ethnographic writing serves as a productive way to conduct participatory ethnographic research, as well as to investigate contemporary childhoods in all their complexity.