457 research outputs found

    Phase Transition and Monopoles Densities in a Nearest Neighbors Two-Dimensional Spin Ice Model

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    In this work, we show that, due to the alternating orientation of the spins in the ground state of the artificial square spin ice, the influence of a set of spins at a certain distance of a reference spin decreases faster than the expected result for the long range dipolar interaction, justifying the use of the nearest neighbor two dimensional square spin ice model as an effective model. Using an extension of the model presented in ref. [Scientific Reports 5, 15875 (2015)], considering the influence of the eight nearest neighbors of each spin on the lattice, we analyze the thermodynamics of the model and study the monopoles and string densities dependence as a function of the temperature.Comment: 11 pages, 8 figure

    The whatsappers’ turn: new forms of cyberactivism

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    Este artigo investiga como o uso das tecnologias da informação e comunicação (TIC’s), em particular, o WhatsApp, vem se apresentando como elemento central para a convocação e a mobilização de ciberativistas nas formas contemporâneas de participação política. A pesquisa verificou o potencial mobilizador do WhatsApp para além das abordagens dicotômicas que, por um lado, defendem entusiasticamente o potencial democratizador da internet como uma espécie de “ágora digital”, por outro, observam sua expansão como tendência à alienação e à desmobilização. Conclui-se, a partir da análise empírica, que os múltiplos usos do WhatsApp representaram novas formas de participação política traduzidas em mecanismos de ativação da cidadania e impacto positivo nas formas coletivas de sociabilidade do grupo.This article investigates how the use of Information and Communication Technologies (ICTs), in particular WhatsApp, has been presented as a central element for the convening and mobilization of cyberactivists in contemporary forms of political participation. For that, it was focused on how the users of the "# United against the coup" group organized protests in 2016 in the city of Florianópolis in Brazil, in what is commonly known as cyberactivism. The article verified the mobilizing potential of WhatsApp in addition to dichotomous approaches that, on the one hand, enthusiastically defend the democratizing potential of the internet as a sort of "digital agora", on the other, observe its expansion as a tendency towards alienation and demobilization. It is concluded from the empirical analysis that the multiple uses of WhatsApp represented new forms of political participation translated into mechanisms of activation of citizenship and positive impact on the collective forms of sociability of the groupMinisterio de Economía y Competitividad CSO2016-78386-

    Understanding values associated with stormwater remediation options in marine coastal ecosystems: A case study from Auckland, New Zealand

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    This paper describes the design and implementation of a choice experiment to understand Aucklanders’ preferences for environmental qualities associated with the effects of urban run-off on marine coastal environments. Auckland’s coastal environments are affected by a range of ecological and human factors. While much research has been undertaken in the area of ecology, little is understood of human preferences for coastal environments and their management. An unlabelled choice experiment was developed with three environmental quality attributes specified at three broad coastal categories. The environmental qualities are ecological health, water clarity, and underfoot conditions. Willingness to pay estimates for these attributes indicates that respondents show a strong preference for improved environmental quality at outer coastal beach locations over middle and upper harbour locations. Water quality leads ecological health, then underfoot conditions in importance at beach locations. An application is discussed in which a hypothetical project consisting of policy and engineering components delivers changes in water quality and underfoot conditions in the Auckland upper harbour areas. A 95% confidence estimate of the money value of that change ranges from 783m.to 783 m. to 1,122 b. The key outcome is demonstration of the choice experiment as a statistically robust and flexible approach to making sense of Aucklanders’ complex preferences for coastal ecosystem management.Environmental Economics and Policy, Research Methods/ Statistical Methods,

    Team Teaching, Humor, and Informal Polling Techniques in NECDMC - Based Research Data Management Workshops at Brandeis University

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    Objective: This poster will detail a few pedagogical techniques incorporated into a series of workshops on research data management. These techniques were chosen to better engage workshop participants by making the material more individually relevant and relatable. Methods: For the second semester in which workshops on research data management (derived from the NECDMC modules) were offered through the Brandeis University Library & Technology Services department, the librarian sought to make the sessions more engaging through several pedagogical techniques. A team teaching approach was employed by inviting senior members of the Technology Help Desk and Hardware Repair Shop to collaborate on and co-teach the workshops. Humor was employed strategically through icons, disaster stories, and select xkcd webcomic strips within the lecture and slides. Informal polling and direct encouragement to share personal anecdotes during the workshop sessions promoted active engagement. Results: Workshop participants were visibly more engaged, asked a greater number of questions, and questions were more directly relevant to the presented material than participants of the first semester\u27s workshops, before these pedagogical techniques were employed. Conclusions: Active and engaged learning techniques are difficult to employ in what are essentially one-shot hour-long instruction sessions, particularly when participants are largely unfamiliar with the material at hand. But by integrating some techniques to capture the interest and encourage participants to make connections to their own experiences we observed a deeper understanding and appreciation of the material

    O Forum Social Panamazônico: o espaço da emergência dos povos da floresta

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    O artigo trabalha a partir de uma pesquisa descolonizante crítica das Relações Internacionais, tendo como estudo de caso o Forum Social Pan-Amazônico, que é um Forum que reuni vários coletivos na região da Amazônia que envolve parte de noves países da América do Sul. O trabalho trabalha a partir da crítica Del Arenal sobre o Etnocentrismo nas Relações Internacionais co base em trabalhos de Dussel, Quijano e Santos. Na última parte o artigo trabalha com possiveis contribuições que este estudo pode propor a comprensão das Relações Internacionais

    Creating an Outreach Plan That Accounts for the Seen and Unforeseen

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    Outreach is a necessary component of an academic library’s operations and often requires extensive time for the planning, approval, execution, and assessment depending on the personnel involved and the scope of the event. Recent literature has started to examine how academic libraries are planning outreach to align strategically with the goals of their larger institutions, but not how they balance these efforts when new opportunities arise throughout the academic year. This article will provide a brief analysis of the literature which addresses issues that academic librarians who plan outreach face. The second half of this article will provide a case study of how the author planned, created, and implemented an outreach plan at her academic branch library. This case study will detail the process of how she used an outreach plan to establish outreach that was efficient and impactful with limited staffing, while also aligning strategically with the goals of her library and the larger institution. In addition, this case study will detail how she used this outreach plan throughout the 2019-2020 academic year to guide decision making when new outreach opportunities would arise. This article will conclude with lessons learned from this process.Ope
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