The digital silver lining of the pandemic: the impact on preservice teachers’ technological knowledge and beliefs

COVID-19 drastically disrupted teaching and learning worldwide and across all educational levels. Technology took on a central role in redefining education under these exceptional circumstances and frequently revealed challenges related to both infrastructure and to teachers’ and learners’ technological skills and readiness. This study aimed to investigate whether the experience of emergency remote education significantly impacted preservice teachers’ knowledge and beliefs for their future teaching with technology. We investigated three cohorts of preservice teachers (pre-lockdown, n = 179; during lockdown, n = 48; post-lockdown, n = 228) and explored differences in their self-reported technological pedagogical content knowledge (TPACK) and their technological beliefs. Findings showed positive effects in the post-lockdown cohort, reflected in higher levels of technological knowledge (TK) and technological pedagogical content knowledge (TPCK) compared to the pre-lockdown cohort. In addition, unique positive effects on content knowledge (CK) and pedagogical content knowledge (PCK) were found in the post-lockdown cohort among preservice teachers with prior teaching experiences. No effects of either cohort or experience emerged for preservice teachers’ technological beliefs. These findings indicate that, despite the challenges related to COVID-19 lockdowns, preservice teachers not only appear to have maintained positive beliefs towards technology but may have even been able to draw benefits from the experience of lockdown. These findings and the positive effects associated with teaching experience are discussed with regard to their implication for teacher education

08371 Abstracts Collection -- Fault-Tolerant Distributed Algorithms on VLSI Chips

From September the $7^{text{th}}$, 2008 to September the $10^{text{th}}$, 2008 the Dagstuhl Seminar 08371 ``Fault-Tolerant Distributed Algorithms on VLSI Chips \u27\u27 was held in Schloss Dagstuhl~--~Leibniz Center for Informatics. The seminar was devoted to exploring whether the wealth of existing fault-tolerant distributed algorithms research can be utilized for meeting the challenges of future-generation VLSI chips. During the seminar, several participants from both the VLSI and distributed algorithms\u27 discipline, presented their current research, and ongoing work and possibilities for collaboration were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available

Investigating contextual knowledge within TPACK: How has it been done empirically so far?

The technological pedagogical content knowledge (TPACK) framework traditionally describes seven domains of knowledge which teachers rely on for effectively combining technology, pedagogy and content within their teaching contexts. To date, the context construct has been acknowledged interchangeably as both the settings within which teachers operate as well as teachers’ knowledge of their teaching environments. The need to distinguish between the two has been emphasized by Mishra (2019) by explicitly upgrading context as an eighth domain of knowledge of TPACK. To support future research on contextual knowledge, based on a systematic review of the TPACK literature published between 2005 and 2020, this study offers an overview of the current empirical methods, instruments, and findings surrounding this construct. Findings reveal a range of approaches (i.e., self-report, interviews, artifacts, observations, vignettes, and multimethods) for investigating contextual knowledge and the comparison of these approaches and their related findings are discussed

Analysis of EEC Regulation 2092/91 in relation to other national and international organic standards

This Deliverable 3.2 report presents an analysis of differences between EEC Regulation 2092/91 and other organic standards and their implementation, using a specially developed database (www.organicrules.org). It further reports on database development. The work was carried out as part of the “EEC 2092/91 (Organic) Revision” STREP project (No. SSPE-CT- 2004-502397) within the EU 6th Framework Programme. The main objective was to identify differences in organic standards in relation to Regulation (EEC) 2092/91 and to analyse selected national governmental and private organic standards with the aim of identifying specific areas in the (EEC) 2092/91 where revision in terms of harmonisation, regionalisation or simplification may be possible

Line-Focus Acoustic Mcroscopy Measurements of Thin-Film Elastic Constants

Thin film materials are widely used as hard, protective coatings for softer surfaces. It is known that fracture strength and hardness are related to the elastic and plastic properties [1]. The elastic constants of the film deposited on a substrate are, however, difficult to measure. By a technique which was recently discussed [2] the elastic constants of amorphous (isotropic) films and single-crystal (anisotropic) films can be obtained by measuring the velocities of surface acoustic waves (SAWs) propagating over a thin-film/ substrate specimen by the use of a line-focus acoustic microscope

Dagstuhl Seminar 08371 on Fault-Tolerant Distributed Algorithms on VLSI Chips

Abstract The Dagstuhl seminar 08371 on Fault-Tolerant Distributed Algorithms on VLSI Chips was devoted to exploring whether the wealth of existing fault-tolerant distributed algorithms research can be utilized for meeting the challenges of futuregeneration VLSI chips. Participants from both the distributed fault-tolerant algorithms community, interested in this emerging application domain, and from the VLSI systems-on-chip and digital design community, interested in well-founded system-level approaches to fault-tolerance, surveyed the current state-of-the-art and tried to identify possibilities to work together. The seminar clearly achieved its purpose: It became apparent that most existing research in Distributed Algorithms is too heavy-weight for being immediately applied in the "core" VLSI design context, where power, area etc. are scarce resources. At the same time, however, it was recognized that emerging trends like large multicore chips and increasingly critical applications create new and promising application domains for fault-tolerant distributed algorithms. We are convinced that the very fruitful cross-community interactions that took place during the Dagstuhl seminar will contribute to new research activities in those areas

Influence of typical environments on quantum processes

We present the results of studying the influence of different environmental states on the coherence of quantum processes. We choose to discuss a simple model which describe two electronic reservoirs connected through tunneling via a resonant state. The model could, e.g., serve as an idealization of inelastic resonant tunneling through a double barrier structure. We develop Schwinger's closed time path formulation of non-equilibrium quantum statistical mechanics, and show that the influence of the environment on a coherent quantum process can be described by the value of a generating functional at a specific force value, thereby allowing for a unified discussion of destruction of phase coherence by various environmental states: thermal state, classical noise, time dependent classical field, and a coherent state. The model allows an extensive discussion of the influence of dissipation on the coherent quantum process, and expressions for the transmission coefficient are obtained in the possible limits.Comment: 46 pages, 11 post script figures. Accepted for publication in Physical Review

Host allometry influences the evolution of parasite host-generalism: theory and meta-analysis

Parasites vary widely in the diversity of hosts they infect: some parasite species are specialists - infecting just a single host species, while others are generalists, capable of infecting many. Understanding the factors that drive parasite host-generalism is of basic biological interest, but also directly relevant to predicting disease emergence in new host species, identifying parasites that are likely to have unidentified additional hosts, and assessing transmission risk. Here, we use mathematical models to investigate how variation in host body size and environmental temperature affect the evolution of parasite host-generalism. We predict that parasites are more likely to evolve a generalist strategy when hosts are large-bodied, when variation in host body size is large, and in cooler environments. We then explore these predictions using a newly updated database of over 20,000 fish-macroparasite associations. Within the database we see some evidence supporting these predictions, but also highlight mismatches between theory and data. By combining these two approaches, we establish a theoretical basis for interpreting empirical data on parasites' host specificity and identify key areas for future work that will help untangle the drivers of parasite host-generalism

Lipid membranes for membrane proteins

Andreas Kukol, ‘Lipid membranes for membrane proteins in Molecular Modeling of Proteins (Clifton: Humana Press/Sringer, 2015), ISBN: 978-1-4939-1464-7, e-BOOK ISBN: 978-1-4939-1465-4Peer reviewe