8,598 research outputs found

    Global Precedence In Visual Search? Not So Fast: Evidence Instead For An Oblique Effect

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    The evidence from an earlier report of global precedence in visual search is reexamined, Two new experiments are reported. The results of the first experiment indicate that the confusability of oblique orientations (a class-2 oblique effect) rather than global precedence was responsible for the earlier results. The results of the second experiment show that the effect critically depends on the presence of heterogeneous distracters rather than on differences in raw processing speed for different spatial scales. The possible role of symmetry is discussed

    Geoarchaeological observations on the Roman town of Ammaia

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    This article presents, for the first time, multidisciplinary geoarchaeological work by a joint Belgo-Italian team from the universities of Ghent and Cassino in and around the Roman urban site of Ammaia in the northern Alentejo region of Portugal. This project is a geoarchaeological case study to investigate the conditioning effects of landscape and landscape evolution on a Roman urban site (and vice versa) in the Iberian peninsula. The site and landscape presentation is followed by a brief discussion of the aims and approaches of the chosen geoarchaeological strategy. With this study we approach the cultural landscape around Ammaia by means of techniques which combine methods both of the geosciences and of archaeological survey. The specific problems of assessing and reconstructing a Roman landscape, much altered by physical movements of the soil and by a two-millennia long period of human interference, will therefore be tackled in a multidisciplinary way. This means first of all making use of all relevant cartographic material, available aerial photographs and relevant satellite images. All important pre-existing archaeological information is inventoried and mapped and new fieldwork organised. This fieldwork, combining traditional archaeological survey techniques and geomorphologic observations, is being used to build a database of landscape features and sites with archaeological relevance for the period concerned. As many field data and cartographic elements as possible are being assembled in a Geographic Information System, specifically developed for this project. This GIS has already enhanced much new cartographic material of crucial importance in reconstructing the landmarks of the site and territory of Ammaia in the first centuries of our era and has helped to evaluate and interpret the evolution of the landscape shortly before, during, and since Roman times. A large part of this contribution is dedicated to reporting on some major observations and results obtained during three field campaigns, in the summers of 2001, 2002 and 2004. These results relate primarily to three fields of archaeological concern with specific relevance to the landscape background: the tracing of the circuit wall of the Roman city, the intra-urban cartography and the supply of water to the urban area during Roman imperial times. The authors believe these investigations to be examples of good practice in the field of geoarchaeology of the classical Mediterranean landscape

    The development and year one implementation of the Local Justice Reinvestment Pilot

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    This report focuses on the initial findings from a process evaluation of the Local Justice Reinvestment pilot (commissioned by the Ministry of Justice), which examines the early development and implementation of the pilot in the first test year. The pilot is one of the Ministry of Justice Payment by Results (PbR) schemes. The methodology was primarily qualitative and included: interviews with strategic and operational managers; interviews and focus groups with front line staff; workshops to map partnership and criminal justice system changes and a focus on exemplar interventions at three sites

    Data Science and Machine Learning in mathematics education: Highschool students working on the Netflix Prize

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    One goal of contemporary mathematical modeling classes in schools should be to include up-to-date problems or interesting, new technologies from the everyday life of students-especially if these allow the didactical reduction to elementary (school-)mathematical knowledge and thus have the potential to enrich mathematics education. Data Science and Machine Learning is applied in numerous areas of science and technology and used in many applications in our everyday life. Using movie recommender systems and the so-called Netflix Prize as an example, this paper discusses how mathematics education can be enriched by modeling real-world, student-centered problems from the field of Machine Learning in school. For this purpose, we describe tested digital learning material from guided modeling projects and share our experience with giving the problem of developing a recommender system as a completely open problem to upper secondary students

    How important is pro-social behaviour in the delivery of public services?

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    A number of papers have posited that there is a relationship between institutional structure and pro-social behaviour, in particular donated labour, in the delivery of public services, such as health, social care and education. However, there has been very little empirical research that attempts to measure whether such a relationship exists in practice. This is the aim of this paper. Including a robust set of individual and job-specific controls, we find that individuals in the non-profit sector are significantly more likely to donate their labour, measured by unpaid overtime, than those in the for-profit sector. We can reject that this difference is simply due to implicit contracts or social norms. We find some evidence that individuals differentially select into the non-profit and for-profit sectors according to whether they donate their labour.pro-social behaviour; public services; donated labour; motivation
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