ASAP: An Automatic Algorithm Selection Approach for Planning

Despite the advances made in the last decade in automated planning, no planner out- performs all the others in every known benchmark domain. This observation motivates the idea of selecting different planning algorithms for different domains. Moreover, the planners’ performances are affected by the structure of the search space, which depends on the encoding of the considered domain. In many domains, the performance of a plan- ner can be improved by exploiting additional knowledge, for instance, in the form of macro-operators or entanglements. In this paper we propose ASAP, an automatic Algorithm Selection Approach for Planning that: (i) for a given domain initially learns additional knowledge, in the form of macro-operators and entanglements, which is used for creating different encodings of the given planning domain and problems, and (ii) explores the 2 dimensional space of available algorithms, defined as encodings–planners couples, and then (iii) selects the most promising algorithm for optimising either the runtimes or the quality of the solution plans

THE TOUCH-DOWN AND TAKE-OFF ANGLES IN DIFFERENT PHASES OF 100 M SPRINT RUN

The variation in running velocity over a 100 m dash has been studied extensively in the last decade. Very few studies, however, have dealt with the changes in technique occurring between the second acceleration (from the normal sprinting position of run the maximal velocity until is reached), maximal velocity and deceleration phases. The purpose of this study was to quantify the touch-down (TO) and take-off (TO) angles in a 100 m sprint run, before, during and after the maximal velocity phase. Ten sprinters were filmed during these phases using a high-speed video camera operating at 250 Hz in a 100 m dash. The results of this study suggest that the Trunk Angle at TO influenced the TO angle. Furthermore, the horizontal distance between the centre of gravity and the Foot at TO, is an important technical characteristic influencing the stride length and the stride rate which provoke the running velocity variation

Teaching Qualitative Research Online: Using Technology to Leverage Student Engagement

Three faculty colleagues collaborated to effectively pilot the concept of an online community to integrate innovative technologies for learning qualitative research concepts and skills in an online research course. The strategies implemented resulted in engaged students with improved research skills. Students also expressed how much they enjoyed learning and implementing concepts of qualitative research. Technologies that were integrated included cutting-edge apps, social media, and Blackboard collaboration tools. The team followed the ASSURE model (Smaldino, Lowther, Russell, & Mims, 2015) to plan and implement for effective integration of technology and media

Resposta da aceroleira aos nutrientes N, P, K, em um latossolo amarelo de castanhal, Pará.

Publicado também: FRAZÃO, D. A. C.; HOMMA, A. K. O; VIÉGAS, I. de J. M. (Ed.). Contribuição ao desenvolvimento da fruticultura na Amazônia. Belém, PA: Embrapa Amazônia Oriental, 2006. p. 121-125

Sedimentary heterogeneity and petrophysical characterization of Barremian tsunami and barrier island/inlet deposits: The Aliaga outcrop as a reservoir analogue (Galve sub-basin, eastern Spain)

The present study examined two sandstone deposits in the Aliaga outcrop as a reservoir analogue over a distance of 200-m-long and attempted to establish a correlation between sand facies and the petrophysical properties of the sandstones in order to investigate the reservoir heterogeneity. The Aliaga reservoir analogue represents the upper part of Camarillas Fm., deposited during the Barremian synrift phase of the Galve sub-basin (Iberian Basin, Spain). It is characterized by a transitional sedimentary interval from sandy-dominant deposits to carbonate-dominant deposits, which were deposited under the same palaeoenvironmental conditions (in relation to systems of back-barrier sedimentation). The description of the Aliaga outcrop provided here consists of lithological descriptions of two sandstone deposits: a tsunami and a barrier island/inlet, at both mesoscopic (decimetres to tens of metres) and microscopic scales (millimetres to centimetres). Both deposits recognized at the basin scale were described in terms of sand grain size, sand sorting and cementation; further cores were drilled along outcrop to collect samples for porosity and permeability measurements. Both sandstone reservoirs are the result of different sedimentary processes that determined facies characteristics, as the different petrophysical properties observed in these deposits. Consequently, the sedimentary process controls the heterogeneity of the sandstones facies and thus, the sand heterogeneity controls the distribution of the petrophysical properties. The classification of sand facies in terms of sand sorting seems to be more appropriate for describing sand heterogeneity; accordingly, petrophysical parameters in both deposits were also influenced by sand sorting. The sand facies and petrophysics heterogeneity of the described deposits can be hierarchically ordered. First-order heterogeneity is related to the basin scale, second-order heterogeneity is related to genesis and the conditions of sediment deposition, and third-order heterogeneity is related to synsedimentary faults and/or post-sedimentation events.This research is a contribution to the project: Análisis de Cuencas Sedimentarias Continentales, of the Gobierno de Aragón, the Análisis de Cuencas Sedimentarias Group of the UCM-CAM, and the projects CGL2011-23717 (Ministerio de Ciencia e Innovación of the Spanish Government and FEDER) and UZ2015-CIE-10 (University of Zaragoza). Additional financial support was provided by a Cnpq (Conselho Nacional de Pesquisa e Desenvolvimento Tecnologico, Brasil) Research Grant (200147/2011-0) and an IAS Schema 1st session 2014 Postgraduate Grant to F. Veloso.Peer reviewe

Pressure effect in the X-ray intrinsic position resolution in noble gases and mixtures

A study of the gas pressure effect in the position resolution of an interacting X- or gamma-ray photon in a gas medium is performed. The intrinsic position resolution for pure noble gases (Argon and Xenon) and their mixtures with CO2 and CH4 were calculated for several gas pressures (1-10bar) and for photon energies between 5.4 and 60.0 keV, being possible to establish a linear match between the intrinsic position resolution and the inverse of the gas pressure in that energy range. In order to evaluate the quality of the method here described, a comparison between the available experimental data and the calculated one in this work, is done and discussed. In the majority of the cases, a strong agreement is observed

Free mobility, locked rights: the posting of construction workers from Portugal

Mobility has become a cornerstone of the contemporary social world. In the European Union, the removal of barriers aimed at promoting the free movement of the labour force is a major goal of the integration process. This article investigates the political economy of posting, analysing the working and living conditions of Portuguese construction workers posted to other EU Member States. It highlights a set of abusive and exploitative practices involved in posting and the role those practices play in the (de)regulation of labour within the construction sector. In spite of the access to a pan-European labour market and the general principle of equal treatment, posted workers have restricted social rights in the host country. The study presented is based on research developed within the ‘EU Post Lab’ project, aimed at promoting activities of cooperation and awareness raising in the field of posting. The methodology adopted includes document analysis and interviews.info:eu-repo/semantics/acceptedVersio

Anthropologie économique. Cours au Collège de France 1992-1993, de Pierre Bourdieu

info:eu-repo/semantics/publishedVersio

Perspectives of social entrepreneurship in Portugal: comparison and contrast with international theoretical approaches

The aim of this article is to present and discuss the perspectives of social entrepreneurship conveyed by third sector organizations in Portugal in the context of the main international theoretical approaches. As part of a research project on social entrepreneurship in Portugal, the article analyses the content of 20 semi-structured interviews with key actors within the Portuguese third sector. It is assumed that the roles these actors play are a clear indicator of the importance their views can hold in defining the social entrepreneurship field in Portugal. This analysis enables us to conclude that heterogeneous views and blurred defined boundaries frame the debate on social entrepreneurship’s processes and definitions, with some actors even rejecting it in favour of other concepts such as “social economy” or “solidarity economy”. Nevertheless, the central issues that arose are associated with the individual qualities of the entrepreneur, as well as the sustainability of the initiatives