Needs and challenges for online language teachers - the ECML project DOTS

The growing use of digital technologies in educational settings, paralleled by a paradigm change in educational theory from an instructivist transmission approach to constructivist and sociocultural theories of learning, demands more adapted teacher training programs, both technical and pedagogical. Looking at factors influencing teachers’ implementation of ICT in the foreign language classroom and guided by the results of a needs analysis survey conducted among twenty six language teachers from twenty five different European countries, the DOTS project aims to develop an online workspace with bite-sized learning objects for autonomous use by language professionals, particularly freelance teachers who frequently miss out on the training opportunities provided for their full-time colleagues

Needs and challenges for online language teachers: The ECML Project DOTS

The growing use of digital technologies in educational settings, paralleled by a paradigm change in educational theory from an instructivist transmission approach to constructivist and sociocultural theories of learning, demands more adapted teacher training programs, both technical and pedagogical. Looking at factors influencing teachers' implementation of ICT in the foreign language classroom and guided by the results of a needs analysis survey conducted among twenty six language teachers from twenty five different European countries, the DOTS project aims to develop an online workspace with bite-sized learning objects for autonomous use by language professionals, particularly freelance teachers who frequently miss out on the training opportunities provided for their full-time colleagues

Band bending inversion in Bi2_2Se3_3 nanostructures

Shubnikov-de-Haas oscillations were studied under high magnetic field in Bi$_2$Se$_3$ nanostructures grown by Chemical Vapor Transport, for different bulk carrier densities ranging from $3\times10^{19}\text{cm}^{-3}$ to $6\times10^{17}\text{cm}^{-3}$. The contribution of topological surface states to electrical transport can be identified and separated from bulk carriers and massive two-dimensional electron gas. Band bending is investigated, and a crossover from upward to downward band bending is found at low bulk density, as a result of a competition between bulk and interface doping. These results highlight the need to control electrical doping both in the bulk and at interfaces in order to study only topological surface states.Comment: 6 pages, 4 figure

Language Teachers and Their Trajectories Across Technology-Enhanced Language Teaching: Needs and Beliefs of ESL/EFL Teachers

In this article, we present the initial results of the first phase of our international Research Network, which sets out to revisit the current needs of language teachers in terms of training to achieve the integration of technology within their educational contexts. We focus on the type of needs and their order of priority from the viewpoint of English as a Second/Foreign Language (ESL/EFL) teachers and suggest some recommendations for training programs. These data, collected via an online questionnaire distributed in several countries, were analyzed quantitatively and qualitatively in relation to participants’ perceptions of needs regarding language education technology, as well as participants’ perceptions of the “ideal” teacher, and their relation to the use of technology. Results indicate that despite overall satisfaction regarding training received, many teachers mention their need for a post-training follow-up. They also express interest in developing “learning task design” skills and in exploring course management platforms such as Moodle. Furthermore, while most participants fully or partially agree with the relationship between technology and excellence in language teaching, their definition of the “ideal” language teacher rarely includes the use of technology. A shift in “ideal” teacher beliefs seems, therefore, necessary for better adoption and use of technology in language education

Uniqueness of Iris Pattern Based on AR Model

The assessment of iris uniqueness plays a crucial role in analyzing the capabilities and limitations of iris recognition systems. Among the various methodologies proposed, Daugman's approach to iris uniqueness stands out as one of the most widely accepted. According to Daugman, uniqueness refers to the iris recognition system's ability to enroll an increasing number of classes while maintaining a near-zero probability of collision between new and enrolled classes. Daugman's approach involves creating distinct IrisCode templates for each iris class within the system and evaluating the sustainable population under a fixed Hamming distance between codewords. In our previous work [23], we utilized Rate-Distortion Theory (as it pertains to the limits of error-correction codes) to establish boundaries for the maximum possible population of iris classes supported by Daugman's IrisCode, given the constraint of a fixed Hamming distance between codewords. Building upon that research, we propose a novel methodology to evaluate the scalability of an iris recognition system, while also measuring iris quality. We achieve this by employing a sphere-packing bound for Gaussian codewords and adopting a approach similar to Daugman's, which utilizes relative entropy as a distance measure between iris classes. To demonstrate the efficacy of our methodology, we illustrate its application on two small datasets of iris images. We determine the sustainable maximum population for each dataset based on the quality of the images. By providing these illustrations, we aim to assist researchers in comprehending the limitations inherent in their recognition systems, depending on the quality of their iris databases

From the editors: stepping stones to teaching lnguages with technology

Introduction to the Special Issue of Teaching English with Technology. 10/2. 2010

A model of CPT violation for neutrinos

Any local relativistic quantum field theory of Dirac-Weyl fermions conserves CPT. Here we examine whether a simple nonlocal field theory can violate CPT. We construct a new relativistic field theory of fermions, which we call ``homeotic'', which is nonlocal but causal and Lorentz invariant. The free homeotic theory is in fact equivalent to free Dirac theory. We show that a homeotic theory with a suitable nonlocal four-fermion interaction is causal and as a result has a well-defined perturbative S-matrix. By coupling a right-handed homeotic fermion to a left-handed Dirac-Weyl fermion, we obtain a causal theory of CPT-violating neutrino oscillations

Online teacher development: collaborating in a virtual learning environment

Over recent years educational institutions have been making increasing use of virtual environments to set up collaborative activities for learners. While it is recognized that teachers play an important role in facilitating learner collaboration online they may not have the necessary skills to do so successfully. Thus, a small scale professional development programme was set up and piloted by two distance universities. The aims were to develop teachers’ experience of online group work; to trial a set of pilot activities which would raise awareness of factors contributing to successful collaborative online activity; and to identify professional development needs in this area. This article reports on the hands-on experience of a group of 20 teachers, examines some of the competences that are needed to successfully collaborate in virtual environments, and presents the skills that teachers need to foster online collaborative learning in the virtual classroom. Quantitative and qualitative data were collected, examining the levels of participation among participants, the collaborative activity of two groups, and teacher perception of the collaboration which took place. The skills identified include planning and managing the collaboration, designing appropriate activities, giving clear instructions and getting students to negotiate ground rules for participation, moderating at the right level, and choosing the right environment and the appropriate tool(s). While this study was carried out with language teachers, many of the findings are applicable to other subject areas where growing emphasis is placed on the development of collaborative skills

Enhancing protective microglial activities with a dual function TREM2 antibody to the stalk region

Triggering receptor expressed on myeloid cells 2 (TREM2) is essential for the transition of homeostatic microglia to a disease‐associated microglial state. To enhance TREM2 activity, we sought to selectively increase the full‐length protein on the cell surface via reducing its proteolytic shedding by A Disintegrin And Metalloproteinase (i.e., α‐secretase) 10/17. We screened a panel of monoclonal antibodies against TREM2, with the aim to selectively compete for α‐secretase‐mediated shedding. Monoclonal antibody 4D9, which has a stalk region epitope close to the cleavage site, demonstrated dual mechanisms of action by stabilizing TREM2 on the cell surface and reducing its shedding, and concomitantly activating phospho‐SYK signaling. 4D9 stimulated survival of macrophages and increased microglial uptake of myelin debris and amyloid β‐peptide in vitro. In vivo target engagement was demonstrated in cerebrospinal fluid, where nearly all oluble TREM2 was 4D9‐bound. Moreover, in a mouse model for Alzheimer's disease‐related pathology, 4D9 reduced amyloidogenesis, enhanced microglial TREM2 expression, and reduced a homeostatic marker, suggesting a protective function by driving microglia toward a disease‐associated state