A First Step Towards Synthesising Rubrics and Video for the Formative Assessment of Complex Skills

Abstract. The performance objectives used for the formative assessment of com- plex skills are generally set through text-based analytic rubrics[1]. Moreover, video modeling examples are a widely applied method of observational learning, providing students with context-rich modeling examples of complex skills that act as an analogy for problem solving [1]. The purpose of this theoretical paper is to synthesize the components of video modeling and rubrics to support the formative assessment of complex skills. Based on theory, we argue that application of the developed Video Enhanced Rubrics (VER) fosters learners’ development of mental models, quality of provided feedback by various actors and finally, the learners mastery of complex skills.We would like to gratefully acknowledge the contribution of the Viewbrics project, that is funded by the practice-oriented research pro- gramme of the Netherlands Initiative for Education Research (NRO), part of The Netherlands Organisation for Scientific Research (NWO)

Nano-oxidation of silicon surfaces: Comparison of noncontact and contact atomic-force microscopy methods

3 pages, 4 figures.Local oxidation lithography by atomic-force microscopy is emerging as a powerful method for nanometer-scale patterning of surfaces. Here, we perform a comparative study of contact and noncontact atomic-force microscopy (AFM) oxidation experiments. The comparison of height and width dependencies on voltage and pulse duration allows establishing noncontact AFM as the optimum local oxidation method. For the same electrical conditions, noncontact AFM oxides exhibit higher aspect ratios (0.04 vs 0.02). The smallness of the liquid meniscus in noncontact AFM oxidation produces smaller oxide widths. We also report a slower oxidation rate in contact AFM oxidation. We explain this result by introducing an effective energy barrier (~0.14 eV) that includes the mechanical work done by the growing oxide against the cantilever (~0.01 eV).This work was financially supported by the Dirección General de Enseñanza Superior e Investigación (PB98-0471) and the European Commission (GR5D-CT- 2000-00349).Peer reviewe

Appealing to Your Better Judgement: A Call for Database Criticism

Engagement with public databases has become a leading way for scholars, artists, and readers alike to encounter works of electronic literature as well as get an overview of the field. Although acknowledged as an important and difficult process, database construction is, in practice, too often underestimated as merely a preparatory task in Digital Humanities. Through the conception of database criticism, I provide a critical apparatus to approach databases in terms of qualitative and aesthetic characteristics. Considering public databases as media texts, I take a digital hermeneutic approach to the reading strategies involved in engaging with databases. What follows is the presence of databases as cultural artifacts that are themselves studied in humanities and social science frameworks. It is in the interest of both the quality and esteem of the databases to develop ways to study and evaluate them parallel to academic reviews of monographs and edited collections. I offer a media-specific framework of four core vectors for database criticism: data and scope, experience, aesthetics, and labor. Building on Critical Data Studies, database criticism needs to identify the means and objectives of the database and thing along with those in reviewing the data. But a database is so much more than its data. A good database incites the pleasure of anticipation and this is determined by both the user and browsing experience. This is linked to the aesthetics of the database, which includes the accessibility of the database at its core. Finally, the explicit evaluation of labor addresses which value is placed on various tasks of developing and maintaining an academic database. My call for database criticism opens up ways to revalue the databases as dissemination of research and provide the opportunity to highlight all elements that we wish to be part of the field going forward.publishedVersio

Description, Host-specificity, and Strain Selectivity of the Dinoflagellate Parasite Parvilucifera sinerae sp.nov. (Perkinsozoa)

17 pages, 7 figures, 2 tablesA new species of parasite, Parvilucifera sinerae sp. nov., isolated froma bloomof the toxic Dinoflagellate Alexandrium minutum in the harbor of Arenys de Mar (Mediterranean Sea, Spain), is described. This species is morphologically, behaviourally, and genetically (18S rDNA sequence) different from Parvilucifera infectans, until now the only species of the genus Parvilucifera to be genetically analyzed. Sequence análisis of the 18S ribosomal DNA supported P. Sinerae as a new species placed within the Perkinsozoa and close to P. infectans. Data on the seasonal occurrence of P. sinerae, its infective rates in natural and laboratory cultures, and intra-species strain-specific Resistance are presented. Life-cycle studies in field simples showed that the dinoflagellate resting zygote (restingcyst) was resistant to infection, but the mobile zygote (planozygote) orpelli clestage (temporary cyst) became infected. The effects of Light and salinity level son the growth of P. sinerae were examined, and the results showed that low salinity levels promote both sporangial germination and higher rates of infection. Our findings on this newly described parasite point to a complex host—parasite interaction and provide valuable information that leads to a reconsideration of the biological strategy to control dinoflagellate blooms by jeans of intentional parasitic infectionsThis research was funded by the EU Project SEED (GOCE-CT-2005-003875). R.I. Figueroa work is supported by a I3P contract and E. Garcés’ work is supported by a Ramon y Cajal grant, both from the Spanish Ministry of Education and SciencePeer reviewe

Probability, causation, and inequality of opportunity

causal modelling; Bayesian epistemology; rationality; subjective probability; sleeping beauty; discrimination; inequality of opportunit

Reflections on the 2021 Nobel Memorial Prize Awarded to David Card, Joshua Angrist, and Guido Imbens

The 2021 Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel was awarded to David Card “for his empirical contributions to labour economics”, and to Joshua Angrist and Guido Imbens “for their methodological contributions to the analysis of causal relationships”. Lennart B. Ackermans reflects on Card, Angrist, and Imben's work. Ackermans argues, first, that advances in causal methodology from Angrist and Imbens have helped solve the credibility crisis in econometrics and revealed shortcomings in past and present graduate textbooks in econometrics. Second, for the field to develop further, economists must resolve the current disputes surrounding causal frameworks. The article compares the merits of the three frameworks for causal modelling proposed by, respectively, Donald Rubin, Judea Pearl, and James Heckman

Finite temperature mobility of a particle coupled to a fermion environment

We study numerically the finite temperature and frequency mobility of a particle coupled by a local interaction to a system of spinless fermions in one dimension. We find that when the model is integrable (particle mass equal to the mass of fermions) the static mobility diverges. Further, an enhanced mobility is observed over a finite parameter range away from the integrable point. We present a novel analysis of the finite temperature static mobility based on a random matrix theory description of the many-body Hamiltonian.Comment: 11 pages (RevTeX), 5 Postscript files, compressed using uufile