191 research outputs found

    Students’ perceptions of global citizenship at a local and an international school in Israel

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    This article reports on a comparative study revealing students’ perceptions and conceptualisations of global citizenship in two different educational settings in Israel, a country facing long-lasting violent conflict between Jewish Israelis and Palestinians. Jewish Israeli students attending a public Israeli school and students at an international school located in Israel catering to a Jewish, Palestinian and international clientele participated in this exploratory qualitative study, which involved in-depth interviews and focus groups with students from both a local and an international school. Four major themes emerged through the analysis: (1) inclusion and exclusion criteria for the term ‘global citizen’; (2) the tensions between the different dimensions of global citizenship; (3) schools’ agency in educating towards global citizenship; and (4) the role of global citizenship in conflict resolution. The main contribution of this study lies in its comparative perspective that enables us to discern the different impacts of the Israeli context on the perceptions of global citizenship in different types of schools

    Justice, and Only Justice, You Shall Pursue: Network Neutrality, the First Amendment and John Rawls\u27s Theory of Justice

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    As broadband becomes the public\u27s technology of choice to access the Internet, it is also emerging as the battlefield upon which the struggle for control of the Internet is being fought. Operators who provide physical access to the service claim the right to discriminate among the content providers who use the infrastructure in which the operators have invested. In contrast, content providers warn that exercising such a policy would undermine the principles that have made the Internet such a success. [...] For academic observers, analysis of this issue has thus far been confined to the areas of property law, innovation, and competition models. This study, however, offers a different framework for analyzing the network neutrality controversy, one that takes into account that the Internet is a new medium of mass self communication. The Internet provides a unique venue for civic engagement, exposure to information, and opportunity for education. The established frameworks that guide the regulation of traditional media are not necessarily suitable for this new form of communication because they fail to address its multi-participant character (as opposed to the limited-participant technologies of old media ), and the abundance created by its innovative technological form (as opposed to the scarcity which characterized old media ). Here arises the urgent need to address this debate in its appropriate context. While others have framed the debate in terms of another battle among the conflicting interests of large corporations, we view it as a struggle between the newly defined classes of haves and have-nots. We contend that using this new frame of reference should provide both those whose interests have been ignored by the regulation of past technologies, and the newly created have-nots, with an opportunity to better their social positioning by enjoying unobstructed access to the Internet as users. Therefore, we propose abandoning the utilitarian philosophy that has characterized U.S. telecommunications regulation--the outcome of which has been promoting the interests of a fortunate few--and adopting the alternative theory of John Rawls\u27s theory of justice. [...] The materialization of the promise of the Internet requires its maintenance as an open and neutral network. We are therefore concerned about the continued reliance on legacy policies and intend to offer here a new underlying theory for regulation of access to the Internet. We suggest that although Rawls\u27s theory preceded the popularization of the Internet by decades, it has the power to bridge the different policy narratives and offer a framework for maintaining the free nature of the Internet because it addresses both the social and economic nature of the Internet policy debate, accepts the general framework of market economy and capitalism, focuses on protecting fundamental rights, and proposes an egalitarian, fair, and just solution

    A comparative case-study of school-LEA-NGO interactions across different socio-economic strata in Israel

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    This study examines the interaction between non-governmental organization (NGO), the Local Education Authority (LEA), and public schools in communities of different socioeconomic backgrounds in Israel. We characterize how schools serving more and less affluent communities create, cultivate, and preserve interactions with NGOs; how NGOs form, and sustain interactions with schools serving communities of different socioeconomic backgrounds; and how this process is maintained through LEA regulation. We show how school–NGO–LEA interaction is largely shaped by the affluence of respective schools’ communities within given educational settings. Analysis of interviews conducted with different stakeholders exposed two main themes: (1) the differing capabilities of various actors in this interaction to express agency; (2) the power relations between involved parties, whereby NGO and LEA impose a global agenda on local schools (particularly those serving less affluent communities) – occasionally in contrast to the needs as perceived by schools’ leaders. Our conclusions offer some insights into the nature and possible consequences of the interaction between third sector organizations and schools serving communities of diverse socioeconomic backgrounds

    Incremental Evaluation of Rules and its Relationship to Parallelism

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    Rule interpreters usually start with an initial database and perform the inference procedure in cycles, ending with a final database. In a real time environment it is possible to receive updates to the initial database after the inference procedure has started or even after it has ended. We present an algorithm for incremental maintenance of the deductive database in the presence of such updates. Interestingly, the same algorithm is useful for parallel and distributed rule processing in the following sense. \\'hen the processors evaluating a program operate asynchronously. then they may have different views of the database. The incremental maintenance procedure we present can be used to synchronize these views

    Chemically and thermally stable silica nanowires with a β-sheet peptide core for bionanotechnology

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    Background: A series of amyloidogenic peptides based on the sequence KFFEAAAKKFFE template the silica precursor, tetraethyl orthosilicate to form silica-nanowires containing a cross-β peptide core. Results: Investigation of the stability of these fibres reveals that the silica layers protect the silica-nanowires allowing them to maintain their shape and physical and chemical properties after incubation with organic solvents such as 2-propanol, ethanol, and acetonitrile, as well as in a strong acidic solution at pH 1.5. Furthermore, these nanowires were thermally stable in an aqueous solution when heated up to 70 °C, and upon autoclaving. They also preserved their conformation following incubation up to 4 weeks under these harsh conditions, and showed exceptionally high physical stability up to 1000 °C after ageing for 12 months. We show that they maintain their β-sheet peptide core even after harsh treatment by confirming the β-sheet content using Fourier transform infrared spectra. The silica nanowires show significantly higher chemical and thermal stability compared to the unsiliconised fibrils. Conclusions: The notable chemical and thermal stability of these silica nanowires points to their potential for use in microelectromechanics processes or fabrication for nanotechnological devices

    Controlling Window Protocols for Time-Constrained Communication in a Multiple Access Environment

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    For many time-constrained communication applications, such as packetized voice, a critical performance measure is the percentage of messages which are transmitted within a given amount of time after their arrival at a sending station. We examine the use of a group random access protocol based on time windows for achieving time-constrained communication in a multiple access environment. First, we formulate a policy for controlling protocol operation in order to minimize the percentage of messages with waiting times greater than some given bound. A semi-Markov decision model is then developed for protocol operation and three of the four optimal control elements of this policy are then determined. Although the semi-Markov decision model can also be used to obtain performance results, the procedure is too computationally expensive to be of practical use. Thus, an alternate performance model based on a centralized queueing system with impatient customers is developed. Protocol performance under the optimal elements of the control policy shows significant improvements over cases in which the protocol is not controlled in this manner. Simulation results are also presented to corroborate the analytic results

    Modification of Hydrophilic and Hydrophobic Surfaces Using an Ionic-Complementary Peptide

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    Ionic-complementary peptides are novel nano-biomaterials with a variety of biomedical applications including potential biosurface engineering. This study presents evidence that a model ionic-complementary peptide EAK16-II is capable of assembling/coating on hydrophilic mica as well as hydrophobic highly ordered pyrolytic graphite (HOPG) surfaces with different nano-patterns. EAK16-II forms randomly oriented nanofibers or nanofiber networks on mica, while ordered nanofibers parallel or oriented 60° or 120° to each other on HOPG, reflecting the crystallographic symmetry of graphite (0001). The density of coated nanofibers on both surfaces can be controlled by adjusting the peptide concentration and the contact time of the peptide solution with the surface. The coated EAK16-II nanofibers alter the wettability of the two surfaces differently: the water contact angle of bare mica surface is measured to be <10°, while it increases to 20.3±2.9° upon 2 h modification of the surface using a 29 µM EAK16-II solution. In contrast, the water contact angle decreases significantly from 71.2±11.1° to 39.4±4.3° after the HOPG surface is coated with a 29 µM peptide solution for 2 h. The stability of the EAK16-II nanofibers on both surfaces is further evaluated by immersing the surface into acidic and basic solutions and analyzing the changes in the nanofiber surface coverage. The EAK16-II nanofibers on mica remain stable in acidic solution but not in alkaline solution, while they are stable on the HOPG surface regardless of the solution pH. This work demonstrates the possibility of using self-assembling peptides for surface modification applications

    The great time series classification bake off: a review and experimental evaluation of recent algorithmic advances

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    In the last five years there have been a large number of new time series classification algorithms proposed in the literature. These algorithms have been evaluated on subsets of the 47 data sets in the University of California, Riverside time series classification archive. The archive has recently been expanded to 85 data sets, over half of which have been donated by researchers at the University of East Anglia. Aspects of previous evaluations have made comparisons between algorithms difficult. For example, several different programming languages have been used, experiments involved a single train/test split and some used normalised data whilst others did not. The relaunch of the archive provides a timely opportunity to thoroughly evaluate algorithms on a larger number of datasets. We have implemented 18 recently proposed algorithms in a common Java framework and compared them against two standard benchmark classifiers (and each other) by performing 100 resampling experiments on each of the 85 datasets. We use these results to test several hypotheses relating to whether the algorithms are significantly more accurate than the benchmarks and each other. Our results indicate that only 9 of these algorithms are significantly more accurate than both benchmarks and that one classifier, the Collective of Transformation Ensembles, is significantly more accurate than all of the others. All of our experiments and results are reproducible: we release all of our code, results and experimental details and we hope these experiments form the basis for more rigorous testing of new algorithms in the future

    internationalization strategies and policies in second tier higher education institutions

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    This study addresses the major objectives and challenges in the internationalization processes of second-tier higher education institutions. We use the examples of universities of applied sciences in the Netherlands, academic colleges in Israel, and community colleges in Canada to offer a global perspective regarding the internationalization efforts in these types of institutions. Through comprehensive comparative analysis of secondary sources, we identify the trends taking place within these types of higher education institutions in these countries. We find that second-tier institutions tend not to have solidified for themselves tailored internationalization approaches and strategies that are uniquely fitting to their own missions, aims and student populations. This oversight creates a situation whereby such institutions, despite their culturally diverse student populations and the promise they hold to create a unique niche within internationalization discourse, fail to utilize the potential inherent in targeted internationalization strategies
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