When Glass and Metal Corrode Together,V: Sodium Copper Formate

A sodium copper formate, first described in 2002, can also form on copper alloys with sodium originating from soda glass hydrolysis. The frequent occurrence (50% of 250 cases of glass-induced metal corrosion) is due to the presence of formaldehyde emissions in storage and its direct reaction to formate in the alkaline surface films. The compound can be produced without the presence of acetate when chalconatronite or metal coupons immersed in soda solution are exposed to formaldehyde vapours. The crystal structure, derived from X-ray powder diffraction, yielded the sum formula Cu₄Na₄O(HCOO)₈(OH)₂·4H₂O. Except for the absence of acetate in the structure, this is in good agreement with the 2002 publication. To assess which kind of combined glass/metal objects are affected, a number of large museum collections were surveyed. Sodium copper formate was detected as a corrosion product using mainly micro-Raman spectroscopy, for instance, on 18 painted Limoges enamels, eight glass vessels with metal mountings, glass beads on metal wire from 11 bridal crowns, nine Christmas tree balls with wire decoration, 40 pieces of jewellery with glass gems, three daguerreotypes, and one miniature with cover glasses.     

Multidimensional assessment of resilience in mothers who are child sexual abuse survivors

OBJECTIVE: There has been relatively little attention given to positive adaptation following childhood sexual abuse (CSA), and typically such resilience has been explored primarily in the intrapersonal domain. This study explored questions about later resilience following CSA within a multidimensional framework by assessing resilience across intrapersonal, interpersonal, and intrafamilial domains. METHOD: This community sample consisted of 79 mothers with a history of CSA who had a child living at home with them. Participants completed four outcome measures (Center for Epidemiologic Studies--Depression Scale, Parenting Stress Index [PSI] Health Scale, PSI Parenting Competence Scale, and a measure of marital satisfaction). Risk and protective factors examined in relation to outcome included mother's age, socioeconomic status, severity of the CSA experience, coping strategy (avoidance, seeking social support, and problem solving), child characteristics, and spousal/partner support. RESULTS: Results indicated that when multiple adaptational domains were assessed, mothers showed discrepancies in how adequately they functioned across domains. While severity of the CSA experience was only weakly associated with outcome, use of avoidant coping emerged as a significant risk factor and was strongly and consistently associated with negative outcome across domains. Spousal/partner support was a strong protective factor and buffered the relationship between depressive symptoms and parenting competence. Difficult child characteristics were significantly associated with mothers' perceptions of physical health and parenting competence. CONCLUSIONS: The findings suggest the importance of comprehensive multimethod assessments of resilience and extend the knowledge of factors associated with positive outcome. The results highlight the need for further research exploring current contextual risk and protective factors associated with resilience in each domain.     

青少年训练主体概念的重建

在原有的运动训练学的背景下,我们在此处描述的对运动训练质的研究设计肯定会被看作是在以自然科学中的量为主导的学科中的一个例外,我们的研究目的在于获得对青少年训练对象的理解。站在教练员的立场,与此项研究相关的方面是错综复杂的,换句话说,此项研究的重点不是研究者的视角,更多的是被研究者的立场观点。本项目的研究内容是青少年训练过程中运动员主观条件的重要性,研究重点是探讨无法进行标准化研究的知识所适用的研究形式。调研几乎涵盖了儿童及青少年训练阶段的全部时间节点,采取了部分标准化、主线鲜明的采访形式,使得调研目的得以完美实现：实事求是地凸显出青少年竞技类运动项目训练体系的内在特征,并且可以对这些特征的合理程度在各种运动项目的对照下进行比较分析。与量化研究方法相比,成功青少年训练的主体概念项目强调了质性研究方法的特征,其采用的调查分析方法体现了探索特性,重建或建设性的特性和形成理论的特性。然而在调查结论中得出了一个成功青少年教练主观理论的逻辑,完全颠覆了针对调研中心思想预先规定的主题结构,有必要通过实验进行更多以客观认知与调查分析为基础的干预性研究,以澄清青少年训练中一些尚不明确的细节问题。此外,在研究成功的青少年训练时,如不考虑教育学、心理学、社会学等方面的因素,我们无法单单从训练科学的角度出发就能足够系统化地分析儿童和青少年在“日常理论”中的训练过程。     

Effects on muscle strength,maximal jump height,flexibility and postural sway after soccer and Zumba exercise among female hospital employees: a 9-month randomised controlled trial

This 9-month randomised controlled workplace physical activity trial investigated the effects of soccer and Zumba exercise, respectively, on muscle strength, maximal jump height, sit-and-reach flexibility and postural sway among female workers. A total of 107 female hospital employees aged 25–63 were cluster-randomised to a soccer group, a Zumba group or a control group. Training was conducted outside working hours as two to three 1-h weekly sessions the first 3 months and once a week the last 6 months. Tests were conducted at baseline, after 3 and 9 months. The soccer group improved maximal neck extension strength both after 3 (1.2 kg; P < 0.05) and 9 months (1.7 kg; P < 0.01) compared to the control group. The Zumba group improved maximal trunk extension strength (3.1 kg; P = 0.04) after 3 months, with improvements in postural sway velocity moment (?9.2 mm²/s; P < 0.05) and lower limb lean mass (0.4 kg; P < 0.05) after 9 months. No significant intervention effects were revealed in vertical jump height or sit-and-reach flexibility. The present study indicates that workplace-initiated soccer and Zumba exercise may be beneficial for improvement of the neck and trunk strength, which may have preventive effects with regard to future perceived muscle pain in the respective body regions. Furthermore, the Zumba group revealed positive effects on lower limb lean mass and postural sway compared to the control group.     

Intersecting discourses of militarism: military and academic gendered organizations

This paper critically discusses the role of the interpreter in the validation of the prior learning of recent immigrants arriving in Sweden by drawing on a perspective from the sociology of translation. The recent immigrants’ difficulties with speaking the local language is usually described as the main problem when it comes to validating their prior learning. As a result, the use of interpreters is proposed to facilitate the assessment process. The current literature largely sees the interpreter’s role in the validation of prior foreign learning as unproblematic. The interpreter is described as a neutral means of transmitting the knowledge, skills and experience of the immigrant in an objective way to the assessor. In this paper I criticise this view of the interpreter as a neutral, objective tool. I argue that the role of the interpreter is not given, but enacted during the validation process. Furthermore, the study shows that, far from transmitting information from the immigrant to the assessor, the interpreter is profoundly implicated in the construction of the knowledge that materialises in the assessment results.     

Editorial Themenheft: Aktuelle Entwicklungen im Softwaretest

Ohne Zusammenfassung     

The Complexity of Teacher Questions in Chemistry Classrooms: an Empirical Analysis on the Basis of Two Competence Models

With regard to the moderate performance of German students in international large-scale assessments, one branch of German science education research is concerned with the construction and evaluation of competence models. Based on the theory-driven definition of competence levels, these models imply a correlation between the complexity of a question or a problem, its difficulty and the cognitive demands that are required to answer or solve it. The aim of the study was to apply two competence models in order to analyse the complexity of questions that chemistry teachers use to promote learning in class as well as to compare the results of this analysis. Two model-based coding schemes were constructed and evaluated on the basis of interrater reliability before analysing the teacher questions in 40 chemistry lessons. The results show that between 60 and 65 % of the questions refer to low complexity levels. Although there is a considerable correspondence between the results (69.2 %), neither model can be considered as redundant. These findings are discussed with regard to the level and the development of students’ skills in science.     

Measuring scientific reasoning – a review of test instruments

Education systems increasingly emphasize the importance of scientific reasoning skills such as generating hypotheses and evaluating evidence. Despite this importance, we do not know which tests of scientific reasoning exist, which skills they emphasize, how they conceptualize scientific reasoning, and how well they are evaluated. Therefore, this article reviews 38 scientific reasoning tests. They used to primarily consist of multiple-choice questions, but since then have become more diverse, even including tests that automatically analyse virtual experiments. Furthermore, this review revealed that the tests focus on the skills of generating hypotheses, generating evidence, evaluating evidence, and drawing conclusions. Additionally, conceptualizations of scientific reasoning have moved towards a domain-specific set of different but coordinated skills over the years. Finally, concluding from gaps in test evaluation, a future focus should be on testing theoretical assumptions, comparing different scientific reasoning tests, and how relevant test results are in predicting criterion variables like academic performance.