270 research outputs found

    Statically Checking Web API Requests in JavaScript

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    Many JavaScript applications perform HTTP requests to web APIs, relying on the request URL, HTTP method, and request data to be constructed correctly by string operations. Traditional compile-time error checking, such as calling a non-existent method in Java, are not available for checking whether such requests comply with the requirements of a web API. In this paper, we propose an approach to statically check web API requests in JavaScript. Our approach first extracts a request's URL string, HTTP method, and the corresponding request data using an inter-procedural string analysis, and then checks whether the request conforms to given web API specifications. We evaluated our approach by checking whether web API requests in JavaScript files mined from GitHub are consistent or inconsistent with publicly available API specifications. From the 6575 requests in scope, our approach determined whether the request's URL and HTTP method was consistent or inconsistent with web API specifications with a precision of 96.0%. Our approach also correctly determined whether extracted request data was consistent or inconsistent with the data requirements with a precision of 87.9% for payload data and 99.9% for query data. In a systematic analysis of the inconsistent cases, we found that many of them were due to errors in the client code. The here proposed checker can be integrated with code editors or with continuous integration tools to warn programmers about code containing potentially erroneous requests.Comment: International Conference on Software Engineering, 201

    Regge and Okamoto symmetries

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    We will relate the surprising Regge symmetry of the Racah-Wigner 6j symbols to the surprising Okamoto symmetry of the Painleve VI differential equation. This then presents the opportunity to give a conceptual derivation of the Regge symmetry, as the representation theoretic analogue of the author's previous derivation of the Okamoto symmetry. [The resulting derivation is quite simple, so it would be surprising if it has not been previously observed. Any references would be appreciated!]Comment: 14 page

    Stability conditions and Stokes factors

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    Let A be the category of modules over a complex, finite-dimensional algebra. We show that the space of stability conditions on A parametrises an isomonodromic family of irregular connections on P^1 with values in the Hall algebra of A. The residues of these connections are given by the holomorphic generating function for counting invariants in A constructed by D. Joyce.Comment: Very minor changes. Final version. To appear in Inventione

    New technologies of representation, collaborative autoethnographies and ‘taking it public’: An example from ‘Facilitating Communication on Sexual Topics in Education’

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    New technologies for representing and communicating autoethnographies make it possible to be publically visible in new and interesting ways that weren’t possible prior to the digital revolution. An important ingredient in this process is the internet platforms that can make the digitisation of performances accessible across the world, even for short, modest creations from less experienced digital storytellers and film makers. As an illustration of the potential applications of digital technologies for ‘taking’ autoethnographic research to the ‘public,’ and making our research accessible to a wider audience we share ‘Reverberations,’ a collaborative autoethnography exploring bullying, homophobia, and other types of sexual harassment and associated feelings of shame, embarrassment and fear which often surround these topics

    Disponibilidad biolĂłgica del calcio y fĂłsforo en diferentes fuentes comerciales.

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    En comparaciĂłn con los materiales de rereferencia (100 por ciento), los mayores porcentajes de disponibilidad biolĂłgica se observaron en los fosfatos monodicĂĄlcicos (110.70 por ciento para calcio y 113.58 por ciento para fĂłsforo) y en los fosfatos bicĂĄlcicos (100.69 por ciento para calcio y 106.16 por ciento para fĂłsforo), mientras que el superfosfato triple (87.11 por ciento) para calcio y 99.15 por ciento para fĂłsforo) y la harina de huesos calcinada (86.58 por ciento para calcio y 91.29 por ciento para fĂłsforo) presentaron los menores porcentaje

    The personal is political: reframing individual acts of kindness as social solidarity in social work practice

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    This paper develops the theoretical position proposed by Zygmunt Bauman (2009), that one of the greatest contemporary ‘social evils’ or injustices we face in society, is the total marketization and individualisation of our lived experience. Bauman (2009) along with Harvey (2005) argues that the last forty years of social, political, and economic reform under the zeitgeist of neoliberalism have transferred the burden of care from the state to the individual. This paper will explore the position that the dominant neoliberal culture within social work, in the form of ‘new managerialism’ has reconstituted social work institutionally as one where interventions now focus on minimum statutory interventions emphasising; risk management, resource allocation, audit culture, and the promotion of self-care through a case work methodology. The discussion will analyse these macro social, political and economic discourses using an ethnographic approach based upon Michael Burawoy’s Global Ethnographic (GE) methodology (Burawoy et al, 2010). Despite the current landscape the research highlights the importance of the personal reframed as the political, and the nuanced ways in which acts of defiance and resistance against the prevailing orthodoxies have been adopted by social workers on the front line

    Numerical Weather Prediction (NWP) and hybrid ARMA/ANN model to predict global radiation

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    We propose in this paper an original technique to predict global radiation using a hybrid ARMA/ANN model and data issued from a numerical weather prediction model (ALADIN). We particularly look at the Multi-Layer Perceptron. After optimizing our architecture with ALADIN and endogenous data previously made stationary and using an innovative pre-input layer selection method, we combined it to an ARMA model from a rule based on the analysis of hourly data series. This model has been used to forecast the hourly global radiation for five places in Mediterranean area. Our technique outperforms classical models for all the places. The nRMSE for our hybrid model ANN/ARMA is 14.9% compared to 26.2% for the na\"ive persistence predictor. Note that in the stand alone ANN case the nRMSE is 18.4%. Finally, in order to discuss the reliability of the forecaster outputs, a complementary study concerning the confidence interval of each prediction is proposedComment: Energy (2012)

    The rise of impact in academia: repackaging a long-standing idea

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    Since the Research Excellence Framework of 2014 (REF2014) ‘impact’ has created a conceptual conundrum gradually being pieced together by academics across the Higher Education sector. Emerging narratives and counter-narratives focus upon its role in dictating institutional reputation and funding to universities. However, not only does literature exploring impact, rather than ‘REF2014 impact’ per se, seldom see it as part of a changing sector; it often treats it as a new phenomenon within the political and social sciences. Here, drawing on academic perceptions of impact set in motion in the UK during the 1970s, we critique the underlying assumption that impact is new. We argue three key points to this end. Firstly, contrary to much of the literature examining academic perceptions of impact, it is a long-standing idea. Secondly, within such accounts, the effect of academic research on policy and society (which is longstanding) and the instrumentalisation of impact as a funding requirement (which is relatively new) are conflated. Thirdly, this conflation creates a novelty effect. In the context of a wider sea change to Higher Education, we examine different forms of consent, acceptance, endorsement and resistance surrounding the ‘new’ impact agenda to argue that this ‘novelty effect’ masks an important transitory process of acclimatisation among academics
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