Influence of Process Parameters on Chlorinated Biocide Decontamination by li-CO2 on Artificially Contaminated Model Materials     

Tiziana Lombardo  Marie Wörle  Vera Hubert  Erwin Hildbrand  Christina Hinterleitner  Ingo Mayer 《文物保护研究》2020,65(2):65-76

ABSTRACT

Previously, heavy use of biocides for the treatment of objects made of organic materials in museum collections (e.g. ethnographic, historical collections) was very common. Now suitable decontamination methods/technologies are being sought. A decontamination treatment by li-CO₂ was optimized that considered the specific requirements of museum objects. The treatment was tested on model materials artificially contaminated with biocide solutions containing dichlorodiphenyltrichloroethane (DDT), pentachlorophenol (PCP), lindane, and permethrin or cypermethrin. High decontamination was achieved for DDT, lindane, PCP, and permethrin on artificially biocide loaded wool and wood model materials. Optimal process parameter settings for li-CO₂ decontamination include a single 30?min cycle for woolen materials and three sequential 30?min cycles each for wood. These methods allow a reduction of at least 90% of all biocides for wool and between 70% and 85% for wood. Decontamination of the latter was more effective for less polar biocides as DDT and permethrin. Despite a significant improvement in decontamination for wood using co-solvents such as acetone, ethanol, and methyl tertiary-butyl ether (MTBE), their use is not recommended due to the increased risk of damage to the objects, in particular if a surface coating is present.  相似文献   

Prenatal Risk Predicts Preschooler Executive Function: A Cascade Model     

Marie Camerota  Michael T. Willoughby 《Child development》2020,91(3):e682-e700

Little research has considered whether prenatal experience contributes to executive function (EF) development above and beyond postnatal experience. This study tests direct, mediated, and moderated associations between prenatal risk factors and preschool EF and IQ in a longitudinal sample of 1,292 children from the Family Life Project. A composite of prenatal risk factors (i.e., low birth weight, prematurity, maternal emotional problems, maternal prepregnancy obesity, and obstetric complications) significantly predicted EF and IQ at age 3, above quality of the postnatal environment. This relationship was indirect, mediated through infant general cognitive abilities. Quality of the postnatal home and child-care environments did not moderate the cascade model. These findings highlight the role of prenatal experience as a contributor to individual differences in cognitive development.  相似文献   

A Meta-Analysis of Single-Case Research on Mathematics Word Problem-Solving Interventions for English Learners with Learning Disabilities and Mathematics Difficulties     

Qingli Lei  Rose A. Mason  Yan Ping Xin  John L. Davis  Marie David  Catharine Lory 《Learning disabilities research & practice》2020,35(4):201-217

This single-case meta-analysis is the first to provide a quantitative synthesis of the published literature on mathematics word problem-solving intervention studies for English learners with learning disabilities and mathematics difficulties. A total of ten single-subject studies were included for analysis. The current study investigated the magnitude of the effect of mathematics interventions targeting the improvement of students’ mathematics word problem-solving performance, and analyzed variables that moderated this effect. Results indicate a moderate overall effect size of 0.81 (95% CI [0.71, 0.90]) on word problem-solving performance for English learners with learning disabilities and mathematics difficulties. Moderator variables such as the implementer of the interventions, instructional focus, and word problem-solving content significantly moderated the mathematics intervention effects.  相似文献   

Nurturing leadership: equitable mentoring for the superintendency     

Ava J. Muñoz  Anita M. Pankake  Shirley Mills  Marie Simonsson 《International Journal of Leadership in Education》2018,21(3):284-292

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Learning a practice through practise: presenting knowledge in doctoral spoken presentations     

Marie Manidis  Rebecca Addo 《Studies in Continuing Education》2017,39(3):235-250

Learning to ‘become doctor’ requires PhD candidates to undertake progressive public displays – material and social – of knowledge. Knowledge in doctoral pedagogy is primarily realised textually, with speaking and writing remaining as the primary assessment rubrics of progress and of the qualification. Participating textually begins, in a public sense, with the Confirmation of Candidature presentation/paper and culminates in a Viva Voce/dissertation. Drawing on linguistic ethnographic observations and analyses, this paper uses practice-based perspectives to examine a doctoral candidate practising to present knowledge publicly in a university research centre. The paper focuses on sociomaterial shifts in the trial run and final delivery of the two presentations examining how the candidate is initiated into new actions in response to these changes. Findings reveal how the candidate engages with collective understandings of the practice of presenting knowledge provided by feedback from her doctoral ‘friends’. Learning a practice through practise highlights the importance of participating as learning and learning as participating. This is particularly so in a time of change for doctoral pedagogy, when honing a practice collectively is argued to be advantageous in a localised setting that recognises and fosters the benefits of participation.  相似文献   

Opinion Versus Knowledge: The Influence of Testimony Format on Children’s Judgments in Morally Relevant Contexts     

Jee Young Noh  Laura Marie Elenbaas  Kyung Ja Park  Young Sun Chung  Melanie Killen 《Early education and development》2017,28(2):240-254

Research Findings: To test children’s use of testimony of others, 3 – 9 years (N = 227) made judgments about a potential peer transgression in which the intentions of the protagonist were ambiguous, after hearing two different forms of testimony. The 2 forms of testimony were (a) opposing opinion-based testimony from an adult authority versus a peer consensus group and (b) knowledge-based testimony (eyewitness testimony) that was counter to the participants’ initial judgments. Findings revealed that when testimony was presented in an opinion-based format, children were likely to side with the opinion that reflected their own interpretation of the peer encounter, regardless of whether the opinion came from a peer consensus or an adult authority. However, when knowledge-based testimony was introduced in support of the opposite of children’s initial interpretation of the ambiguous peer encounter, children most often changed their initial judgment to align with the new testimony. That is, children used knowledge-based testimony but not opinion-based testimony to evaluate a potential transgression. Practice or Policy: These findings demonstrate that the way in which testimony is delivered to children has a direct influence on their decision making about peer interactions and has relevance for teacher–student discourse in the classroom.  相似文献   

The development of the nature of science view scale (NOSvs) at university level     

Senar Temel  Şenol Şen  Özgür Özcan 《Research in Science & Technological Education》2018,36(1):55-68

Background: Determining individuals’ views of the nature of science is quite important for researchers since it is both a component of scientific literacy and a fundamental aim of science education.

Purpose: This study aims to develop a NOSvs for assessing prospective teachers’ views of the nature of science and to analyse their psychometric properties.

Sample: A total of 565 prospective teachers participated in the study.

Design and methods: The Kaiser–Meyer–Olkin (KMO) Index and Bartlett’s Sphericity Test were used in this study. Confirmatory factor analysis (CFA) was performed to determine the construct validity of the scale. Cronbach’s Alpha (α) coefficient was calculated for the reliability of the study.

Results: It was consequently found that the KMO was larger than .50. That Bartlett’s Sphericity Test was also statistically significant. The items with item-total correlations smaller than .30 were removed from the scale. Cronbach’s α values calculated for each sub-scale were above .70. In consequence of the first CFA performed, fit indices were found to be below the expected level. For this reason, three more items with the least item-total correlations were removed from the scale. Following the CFA, the final form of the scale included 36 items and five sub-scales.  相似文献   

The political dimension in ESE: the construction of a political moment model for analyzing bodily anchored political emotions in teaching and learning of the political dimension     

Michael Håkansson  Leif Östman 《Environmental Education Research》2019,25(4):585-600

This article departures from the understanding of environmental sustainable education (ESE) as a political project that consists of dissonant and conflicting voices. The aim of the article is to understand how affection, i.e. bodily sensations, transform into political emotions in teaching and learning settings. The article offers a philosophical and empirically based model called the ‘political moment model’ for analyzing bodily anchored political emotions in teaching and learning of the political dimension. The model was developed in response to an empirical case study where the data were somewhat confusing. In order understand the empirical data, we used parts of Mouffe’s theory of the political and various scholars’ work on political emotions and placed these aspects in a pragmatist standpoint of experience, emotions and meaning making. The model helped to investigate students’ experiences of the political dimension in situations where they experienced affection, i.e. bodily sensation, and emotions in connection with reflections and discussions about how to handle public issues of sustainable development. The article ends with a theoretical discussion of the findings in order to understand the political dimension in teaching and learning activities and to discern possible directions for future research on political moments in ESE.  相似文献   

Logics of business education for sustainability     

Pernilla Andersson  Johan Öhman 《Environmental Education Research》2016,22(4):463-479

This paper explores various kinds of logics of ‘business education for sustainability’ and how these ‘logics’ position the subject business person, based on eight teachers’ reasoning of their own practices. The concept of logics developed within a discourse theoretical framework is employed to analyse the teachers’ reasoning. The analysis takes its starting point in different approaches to how a business ought to or could take responsibility for sustainable development. Different approaches to business ethical responsibilities, in combination with assumptions about how educational content is legitimised and presupposed purposes of education, are used to construct logics of business education for sustainability. In the paper, the results of this analysis are presented as: the logic of profit-, social- or radical-oriented business education. Our results also show how the different logics position the subject business person differently, as one who adapts to, adds or creates ethical values. The results are first discussed in terms of how environmental and social challenges could be dealt with in the future and secondly, considering the risk of de-subjectification with regard to profit-oriented business education, the implications this may have for the educational quality itself.  相似文献   

OCCUPATIONAL/CAREER INDECISION FOR ECONOMICALLY DISADVANTAGED HIGH SCHOOL STUDENTS OF HIGH INTELLECTUAL ABILITY: A MIXED‐METHODS COGNITIVE PROCESS MODEL          下载免费PDF全文

Jae Yup Jung  Marie Young 《Psychology in the schools》2017,54(7):718-735

A mixed‐methods design was employed to identify the cognitive processes that lead to occupational/career indecision for economically disadvantaged adolescents of high intellectual ability. In the first phase, interview data collected from 26 economically disadvantaged intellectually gifted Australian adolescents were analyzed using grounded theory to develop two alternative models of cognitive processes that lead to occupational/career indecision. In the second phase, these models were quantitatively tested and refined using structural equation modeling of survey data collected from 917 economically disadvantaged intellectually gifted Australian adolescents. The finally accepted model, identified using a competing models strategy, suggested that valuing the thoughts of family on general matters is positively predictive of a desire to live up to one's potential and the experience of amotivation about the occupational decision. In turn, occupational amotivation appears to be positively associated with occupational indecision, but negatively associated with multipotentiality and a desire to fulfill one's potential.  相似文献