Abstract:
The Independent Learning Centre at Sung Bin Home for Girls is a language and life skills learning environment for girls between the ages of 8 and 18 who reside at Sung Bin Orphanage in Gwangju, South Korea. Although initially learners exhibited a great deal of enthusiasm for the centre, over time interest faded to the extent that many ceased to be regular users. This article describes the efforts of volunteers and orphanage staff to revive interest through a community art project intended to enhance learner identification with the centre. In addition to highlighting the importance of collaboration among stakeholders, the article asserts that undertakings of the type described here should be seen as part of an on-going process of maintaining engagement.

Abstract:
Several efforts are currently made from space missions in order to get accurate solar astrometric measurements i.e. to probe the long term variations of solar radius or shape, their link with solar irradiance variations and their influence on earth climate. These space missions use full disk solar imagery. In order to test our ability to perform such measurements from ground on the long term, we need to use similar techniques and instruments simultaneously from ground and space. This should help us to model and understand how the atmosphere affect ground based metrologic measurements. However, using full imagery from ground instead of the traditional astrolabe technique immediatly raise the question of the effect of refraction and how well we can correct from it. The goal is to study in details the influence of pure astronomical refraction on solar metrologic measurements made from ground-based full disk imagery and to provide the tools for correcting the measurements and estimating the associated uncertainties. We use both analytical and numerical methods in order to confront commonly or historically used approximations and exact solutions. We provide the exact formulae for correcting solar radius measurements at any heliographic angle and for any zenith distance. We show that these corrections can be applyed up to 80 degree of zenith distance provided that full numerical integration of the refraction integral is used. We also provide estimates of the absolute uncertainties associated with the differential refraction corrections and shows that approximate formulae can be used up to 80 degree of zenith distance for computing these uncertainties. For a given instrumental setup and the knowledge of the uncertainties associated with local weather records, this can be used to fix the maximum zenith distance one can observe depending on the required astrometric accuracy.

Abstract:
O artigo aborda a teoria dos frames aplicada ao jornalismo no que se refere à problemática da temporalidade. Identificamos e analisamos determinadas no es de tempo que aparecem referidas nessa vertente teórica. Constatamos, na linha de autores como Mouillaud, que em várias das abordagens a quest o do enquadramento prende-se aos conteúdos dos acontecimentos, da sua identidade, e n o das regras que transformam uma ocorrência em acontecimento, em notícia. A própria temporalidade é assumida como um dos tra os de identidade dos acontecimentos, como uma dimens o do seu conteúdo.

Abstract:
This paper explores the temporal organization as a dimension of analysis in the production of journalistic event. It is proposed an understanding of the present time in journalistic discourse as a necessary sense produced from the combination of certain representations of the time figure. The approach focuses on the way the temporality integrates the system of rules that defines the particularity of the journalistic discourse, that systemize the world and to produce the culturally related meaning to the present time information.

Abstract:
Given a $\Gamma$-semigroup $S$, we construct a semigroup $\Sigma$ in such a way that one sided ideals and quasi-ideals of $S$ can be regarded as one sided ideals and quasi-ideals respectively of $\Sigma$. This correspondence and other properties of $\Sigma$, allow us to obtain several results for $S$ without having the need to work directly with it, but solely employing well known results of semigroup theory. For example, we obtain the Green's theorem for $\Gamma$-semigroups found in \cite{PT}, as a corollary of the usual Green's theorem in semigroups. Also we prove that, if $S$ is a $\Gamma$-semigroup and $\gamma_{0} \in \Gamma$ such that $S_{\gamma_{0}}$ is a completely simple semigroup, then for every $\gamma \in \Gamma$, $S_{\gamma}$ is completely simple too.

Abstract:
Related to a group presentation $\mathcal{P}=\mathcal{GP}(\mathbf{x},\mathbf{r})$ we consider two monoids. The first one is the monoid $\Upsilon$ defined by the monoid presentation $\mathcal{MP}(Y \cup Y^{-1}, P)$ where $Y^{\varepsilon}$ ($\varepsilon=\pm1$) is the set of symbols $(r^{u})^{\varepsilon}$ ($\varepsilon=\pm1$) with $r \in \mathbf{r}$ and $u \in FG(\mathbf{x})$ and $P$ consists of all crossed commutations $(ab,ba^{\theta b})$ and $(ab,b^{\theta a^{-1}}a)$ where $a,b \in Y\cup Y^{-1}$. The second one is the universal enveloping group $\mathcal{G}(\Upsilon)$ of $\Upsilon$ given by the group presentation $\mathcal{GP} (Y \cup Y^{-1}, \hat{P})$ where $\hat{P}$ is the set of all words $ab\iota(a^{\theta b})\iota(b)$ and $ab\iota(a)\iota(b^{\theta a^{-1}})$ with $\iota(c)$ standing for the inverse of $c$ in the free group over $Y\cup Y^{-1}$. In terms of these monoids we prove that if $d=(a_{1},...,a_{n})$ is an identity $Y$-sequence over $\mathcal{P}$, then $d$ is Peiffer equivalent to the empty sequence if and only if, the image of $d$ in $\mathcal{G}(\Upsilon)$ belongs to the subgroup $\hat{\mathfrak{U}}$ of $\mathcal{G}(\Upsilon)$ generated by the images of $aa^{-1}$ with $a \in Y \cup Y^{-1}$. We use this to prove a necessary and sufficient condition under which a subpresentation of an aspherical group presentation is aspherical.

Abstract:
Lead zirconate titanate Pb(Zr_{0.50}Ti_{0.50})O_{3} (PZT) thin films were deposited by a polymeric chemical method on Pt(111)/ Ti/SiO2/Si substrates to understand the mechanisms of phase transformations in these films. PZT films pyrolyzed at temperatures higher than 350℃ present a coexistence of pyrochlore and perovskite phases, while only perovskite phase is present in films pyrolyzed at temperatures lower than 300℃. For films where the pyrochlore and perovskite phase coexists the amount of pyrochlore phase decreases from top surface to the bottom film-electrode interface and the PZT structure near top surface are Ti-rich compositions while near the bottom film-electrode interface the compositions are Zr-rich. For pyrochlore-free PZT thin film, a small (100) orientation tendency near the film-electrode interface was observed.

Abstract:
We present a class of spherically symmetric random variables defined by the property that as dimension increases to infinity the mass becomes concentrated in a hyperspherical shell, the width of which is negligible compared to its radius. We provide a sufficient condition for this property in terms of the functional form of the density and then show that the property carries through to equivalent elliptically symmetric distributions, provided that the contours are not too eccentric, in a sense which we make precise. Individual components of such distributions possess a number of appealing Gaussian-like limit properties, in particular that the limiting one-dimensional marginal distribution along any component is Gaussian.

Abstract:
in the bahia, brazilian northeast, the tourism has been disclosed as an attractive alternative for the economic development of the region coast of the cacao and especially for the municipality of itacaré, that blunts in the preference of the national and international tourists, who frequent the south of the state in the high station. in this direction, the objective of the present work is to make a study of the socio-environmental and economic impacts of the tourism and its repercussions in the local development.