Literacy in our Lives, Past, Present and Future: Exploring Digital Stories by UAE Pre-service Teachers

The purpose of this research study was to examine how pre-service teachers in a college of education in the United Arab Emirates (UAE) used multimodal digital storytelling to explore their language and literacy learning experiences in Arabic and English. Twenty-one pre-service teachers participated in this qualitative study. Drawing on the digital stories, reflection papers and open-ended surveys as data, the study explored the pre-service teachers’ bilingual literacy language experiences and how they created their digital stories. Emerging themes included early experiences in language and literacy learning at home and at school, and expanded notions of literacy. The memoirs offered a glimpse into the cultures, linguistic development and schooling of the participants and importance of using multimodal digital storytelling to support literacy and language learning in ESL/EFL contexts

Synanthropic Flora of Sieradz and Zduńska Wola

The paper presents results of studies on the synanthropic flora of Sieradz and Zduńska Wola carried out between 1977- -1981. The Synanthropic flora of these towns is characterized by its big diversification and rich variety, which is connected with differentiation of habitats. It includes 502 species in Sieradz (S) and 426 in Zduńska Wola (ZW). Among vascular plants there prevail apothytes (61.6 per cent in Sieradz, and 61.7 per cent in Zduńska Wola).Zadanie pt. Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę

Solving the Bose-Hubbard model in new ways

We introduce a new method for analysing the Bose-Hubbard model for an array of bosons with nearest neighbor interactions. It is based on a number-theoretic implementation of the creation and annihilation operators that constitute the model. One of the advantages of this approach is that it facilitates computation with arbitrary accuracy, enabling nearly perfect numerical experimentation. In particular, we provide a rigorous computer assisted proof of quantum phase transitions in finite systems of this type. Furthermore, we investigate properties of the infinite array via harmonic analysis on the multiplicative group of positive rationals. This furnishes an isomorphism that recasts the underlying Fock space as an infinite tensor product of Hecke spaces, i.e., spaces of square-integrable periodic functions that are a superposition of non-negative frequency harmonics. Under this isomorphism, the number-theoretic creation and annihilation operators are mapped into the Kastrup model of the harmonic oscillator on the circle. It also enables us to highlight a kinship of the model at hand with an array of spin moments with a local anisotropy field. This identifies an interesting physical system that can be mapped into the model at hand.Comment: 12 pages, 3 figures; submitte

Optimization of circular orifice jets mixing into a heated cross flow in a cylindrical duct

To examine the mixing characteristics of circular jets in an axisymmetric can geometry, temperature measurements were obtained downstream of a row of cold jet injected into a heated cross stream. The objective was to obtain uniform mixing within one duct radius downstream of the leading edge of the jet orifices. An area weighted standard deviation of the mixture fraction was used to help quantify the degree of mixedness at a given plane. Non-reacting experiments were conducted to determine the influence of the number of jets on the mixedness in a cylindrical configuration. Results show that the number of orifices significantly impacts the mixing characteristics of jets injected from round hole orifices in a can geometry. Optimum mixing occurs when the mean jet trajectory aligns with the radius which divides the cross sectional area of the can into two equal parts at one mixer radius downstream of the leading edge of the orifice. The optimum number of holes at momentum-flux ratios of 25 and 52 is 10 and 15 respectively