Local texture and percolative paths for long-range conduction in high critical current density TlBa₂Ca₂Cu₃O₈₊ₓ deposits

©1994 American Institute of Physics. The electronic version of this article is the complete one and can be found online at: http://link.aip.org/link/?APPLAB/64/106/1DOI:10.1063/1.110908A possible microstructural origin of the high critical current densities which have been obtained in c-axis-aligned, polycrystalline TlBa₂Ca₂Cu₃O₈₊ₓdeposits has been identified. The results of x-ray diffraction determinations of basal plane texture of Tl-1223 deposits prepared by spray pyrolysis are observed to depend on the size of the x-ray beam. Furthermore, most grain boundaries were found from transmission electron microscopy to have small misorientation angles. It is concluded that although overall the basal plane orientations are nearly random, there is a high degree of local texture indicative of colonies of similarly oriented grains. The spread in a-axis orientation within a colony is ~10°–15°. Intercolony conduction, it is suggested, may be enhanced by a percolative network of small-angle grain boundaries at colony interfaces

Photon-Photon Entanglement with a Single Trapped Atom

An experiment is performed where a single rubidium atom trapped within a high-finesse optical cavity emits two independently triggered entangled photons. The entanglement is mediated by the atom and is characterized both by a Bell inequality violation of S=2.5, as well as full quantum-state tomography, resulting in a fidelity exceeding F=90%. The combination of cavity-QED and trapped atom techniques makes our protocol inherently deterministic - an essential step for the generation of scalable entanglement between the nodes of a distributed quantum network.Comment: 5 pages, 4 figure

Development of ultra-light pixelated ladders for an ILC vertex detector

The development of ultra-light pixelated ladders is motivated by the requirements of the ILD vertex detector at ILC. This paper summarizes three projects related to system integration. The PLUME project tackles the issue of assembling double-sided ladders. The SERWIETE project deals with a more innovative concept and consists in making single-sided unsupported ladders embedded in an extra thin plastic enveloppe. AIDA, the last project, aims at building a framework reproducing the experimental running conditions where sets of ladders could be tested

MathE - improve mathematical skills in higher education

Higher education students of scientific subjects often lack the basic mathematical skills to follow lectures and make the most of the lecturer’s teachings. It is necessary to identify the gaps in each students’ understanding of the concepts and offer teachers adequate resources to motivate and provide their students the skills and competences they miss. The main goal of MathE - Improve Maths Skills in Higher Education is to encourage training and exchange in order to enhance and strengthen the quality of teaching and to support the use of digital and online technologies to improve pedagogies and assessment methods. MathE also aims to set up transnational teacher training courses and strengthen cooperation between universities that already offer such courses.info:eu-repo/semantics/publishedVersio

Technological and Implementation Issues in Moodle-Based Digital Badge System

Digital badges, touted as a gamification tool that can potentially influence learner motivation, engagement and participation, are being used increasingly in a variety of educational domains to facilitate and motivate learning. Using a badge system design implemented in the Moodle learning management platform, data was collected from four experiments from 2015 to 2017 to examine the effects of gamification with the use of digital badges on introductory programming students' intrinsic motivation. This paper provides an in-depth examination of seldomly discussed technological and implementation issues we encountered in implementing our Moodle-based badge system, worthy of exploration to support future gamification studies in this area. Our gamified implementation is analyzed according to five main factors primarily adopted from an IT implementation framework: (1) assessment of needs, (2) choice of technology, (3) technological infrastructure, (4) system and environmental factors and (5) evaluation. The findings highlight enabling and challenging factors associated with the technology and badge implementation. Our experience shows that badge systems may be influenced by contextual factors such as cost and scale of implementation. We provide recommendations to guide educational stakeholders, particularly those considering Moodle as their badge implementation platform

Technological and Implementation Issues in Moodle-Based Digital Badge System

Digital badges, touted as a gamification tool that can potentially influence learner motivation, engagement and participation, are being used increasingly in a variety of educational domains to facilitate and motivate learning. Using a badge system design implemented in the Moodle learning management platform, data was collected from four experiments from 2015 to 2017 to examine the effects of gamification with the use of digital badges on introductory programming students' intrinsic motivation. This paper provides an in-depth examination of seldomly discussed technological and implementation issues we encountered in implementing our Moodle-based badge system, worthy of exploration to support future gamification studies in this area. Our gamified implementation is analyzed according to five main factors primarily adopted from an IT implementation framework: (1) assessment of needs, (2) choice of technology, (3) technological infrastructure, (4) system and environmental factors and (5) evaluation. The findings highlight enabling and challenging factors associated with the technology and badge implementation. Our experience shows that badge systems may be influenced by contextual factors such as cost and scale of implementation. We provide recommendations to guide educational stakeholders, particularly those considering Moodle as their badge implementation platform

Multi-score Learning for Affect Recognition: the Case of Body Postures

An important challenge in building automatic affective state recognition systems is establishing the ground truth. When the groundtruth is not available, observers are often used to label training and testing sets. Unfortunately, inter-rater reliability between observers tends to vary from fair to moderate when dealing with naturalistic expressions. Nevertheless, the most common approach used is to label each expression with the most frequent label assigned by the observers to that expression. In this paper, we propose a general pattern recognition framework that takes into account the variability between observers for automatic affect recognition. This leads to what we term a multi-score learning problem in which a single expression is associated with multiple values representing the scores of each available emotion label. We also propose several performance measurements and pattern recognition methods for this framework, and report the experimental results obtained when testing and comparing these methods on two affective posture datasets