The ITAR Treaty and Its Implications for U.S. Space Exploration Policy and the Commercial Space Industry

in Journal of Air Law and Commerce (The) (2008)

Item Response Theorie – eine Einführung

in Wilde, M.; Basten, S.; Fries, B. (Eds.) et al Forschen für den Unterricht. Junge Experten zeigen wie’s geht (2012)

iTEO

Scientific Conference (2015, November 26)

iTEO as a translanguaging and learning space

Scientific Conference (2016, June 10)

The present paper investigates translanguaging practices and types of talk of 6 to 8 year-old multilinguals who record texts on the App iTEO in Luxembourg. ITEO enables users to record and edit oral text ... [more ▼]

The present paper investigates translanguaging practices and types of talk of 6 to 8 year-old multilinguals who record texts on the App iTEO in Luxembourg. ITEO enables users to record and edit oral text, to listen to recordings and to structure the recording process. The automatic playback materializes the language and provides opportunities for reflection. The collective process of recording and transforming texts presents children with opportunities to use exploratory talk proven to stimulate learning (Mercer 2000, 2004). Our qualitative longitudinal study focuses on the use of iTEO for teaching and learning languages in nursery and primary schools (http://storying.bsce.uni.lu/). The study’s multi-method approach, with data collected over two years, includes: observations of activities involving iTEO, video recording of children`s storying, interviews with all participants and the collection of documents. The data analysis followed the principles of Grounded Theory (Charmaz 2006, Strauss & Corbin 1990) and was assisted by the programme Nvivo. Findings have shown that children develop linguistic and metalinguistic competences and that they translanguage regularly while working with iTEO (Gretsch 2014, Kirsch & Gretsch, 2015). In this paper, we discuss a case study of children in the first grades of primary school with the following purposes: 1. To identify instances of translanguaging; 2. To analyze the different kinds of discourse emerging during the co-construction of text on iTEO; and 3. To show how these contribute to learning. We argue that iTEO creates a translanguaging space (García & Wei 2014), where children can draw on their entire repertoire in order to learn. Embedded in multilingual pedagogies, iTEO helps learners to co-construct linguistic knowledge through different types of talk. The results of our case study will contribute to a deeper understanding of the ways in which multilingual children translanguage and use different types of talk in autonomous, collaborative and computer-assisted activities. References Charmaz, K. 2006. Constructing Grounded Theory. A Practical Guide Through Qualitative Analysis. London: Sage. Garcia, O. & W. Li. 2014. Translanguaging: Language, Bilingualism and Education. New York: Basingstoke: Palgrave MacMillan. Kirsch, C. 2014, Storytelling at home and at the nursery school: A study of bilingual children`s literacy practices, in Morys N., C. Kirsch, I. De Saint-Georges and G. Gretsch, Lernen und Lehren in multilingualen Kontexten: Zum Umgang mit sprachlich-kultureller Vielfalt in Klassenraum. Frankfurt, Peter Lang Verlag, 219-246. Kirsch, C. and G. Gretsch. 2015. L`apprentissage langagier avec l`app iTEO, Multilinguisme: enseignement, littératures et cultures au Luxembourg, Synergies pays germanophones, Gerflint, 2015 (8), 37-48. Mercer, N. 2000. Words and minds: how we use language to think together. London: Routledge. Mercer, N. 2004. Sociocultural discourse analysis: Analysing a classroom talk as a social mode of thinking. Journal of Applied Linguistics, vol. 1(2): 137-168. Strauss, A. & J. Corbin. 1990. Basics of Qualitative Research: Grounded Theory Procedures and Techniques. Newbury Park: Sage. [less ▲]

iTEO – ein Tool zur Valorisierung der Mehrsprachigkeit

Scientific Conference (2013, June 28)

iTEO ist eine iPad App, die es ermöglicht, Sprache aufzunehmen und Texte (Wörter, Sätze) zu editieren. Wir setzten iTEO in verschiedenen Grundschulklassen in Luxemburg ein, um zu untersuchen, wie Kinder ... [more ▼]

iTEO ist eine iPad App, die es ermöglicht, Sprache aufzunehmen und Texte (Wörter, Sätze) zu editieren. Wir setzten iTEO in verschiedenen Grundschulklassen in Luxemburg ein, um zu untersuchen, wie Kinder und Lehrpersonen das Tool zur Sprachförderung im Unterricht einsetzen. Die Ergebnisse unserer Studien zeigen, dass Kinder, die gemeinsam mit Kameraden Geschichten erzählten, ihre Sprache entwickelten (z.B. Wortschatz, Grammatik, diskursive Kompetenzen), sich metalinguistisches Wissen aneigneten und Lernstrategien erwarben. [less ▲]

iTEO: examining the use of the App iTEO for teaching and learning languages in primary schools: 7 educational videos

Learning material (2017)

An Iterative Approach to Nonconvex QCQP with Applications in Signal Processing

in 2016 IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM) (2016, July 10)

This paper introduces a new iterative approach to solve or to approximate the solutions of the nonconvex quadratically constrained quadratic programs (QCQP). First, this constrained problem is transformed ... [more ▼]

This paper introduces a new iterative approach to solve or to approximate the solutions of the nonconvex quadratically constrained quadratic programs (QCQP). First, this constrained problem is transformed to an unconstrained problem using a specialized penalty-based method. A tight upper-bound for the alternative unconstrained objective is introduced. Then an efficient minimization approach to the alternative unconstrained objective is proposed and further studied. The proposed approach involves power iterations and minimization of a convex scalar function in each iteration, which are computationally fast. The important design problem of multigroup multicast beamforming is formulated as a nonconvex QCQP and solved using the proposed method. [less ▲]

Iterative design of mobile learning systems for school projects

in Technology, Instruction, Cognition & Learning (2009), 6(4), 235-251

Different approaches have been proposed on the design and development of digital and interactive technology in mobile learning contexts. In line with recent findings in literature, we suggest that mobile ... [more ▼]

Different approaches have been proposed on the design and development of digital and interactive technology in mobile learning contexts. In line with recent findings in literature, we suggest that mobile learning systems benefit from a criteria-based iterative design and development process that incorporates evaluation results of mobile learning scenarios based on school curricula. Underlying these scenarios is a holistic, socio-technical system view, which makes allowance for the complex dynamics between teachers, students, researchers, the multiplicity of contextual factors, and the specifications and requirements of the digital devices and applications, as well as their interrelations. Five school project scenarios are described, as well as the evaluation process involved that served as an integral part in creating a dynamic optimization process for the design and development of digital and interactive systems that follow efficiency criteria for mobile learning (i.e., construction, contextualization, communication, and control). In addition, we argue that mobile systems should also allow for users’ or students’ participatory activities in the preparation phase to bridge the gap between indoor and outdoor learning. [less ▲]

An iterative learning approach for anticipatory traffic signal control on urban networks

in Transportmetrica B: Transport Dynamics (2016)

An Iterative Learning Approach for Signal Control in Urban Traffic Networks

in Proceedings of IEEE-ITS Conference (2013)

Traffic signal control influences route choice in traffic networks, and may even determine whether a traffic system settles in equilibrium or destabilizes into oscillatory patterns. Ideally, a stable ... [more ▼]

Traffic signal control influences route choice in traffic networks, and may even determine whether a traffic system settles in equilibrium or destabilizes into oscillatory patterns. Ideally, a stable equilibrium flow pattern should result from the interaction between control and route choice on a long-term horizon. This paper proposes an iterative learning approach for designing signal controls able to attract the system to equilibrium in an acceptable convergence speed. The traffic assignment model and combined traffic assignment and control problem are first introduced. An iterative learning control (ILC) based signal control is formulated and a basic model inversion method is analyzed. To deal with the nonlinearity of traffic system, a Newton based ILC algorithm is applied. Test in an example network verifies the effectiveness of the ILC method in achieving stable equilibrium in the traffic system. [less ▲]