6,352 research outputs found
Phase Transition and Monopoles Densities in a Nearest Neighbors Two-Dimensional Spin Ice Model
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
Does e-learning policy drive change in Higher Education?: A case study relating models of organisational change to e-learning implementation
Due to the heightened competition introduced by the potential global market and the need for structural changes within organisations delivering e-content, e-learning policy is beginning to take on a more significant role within the context of educational policy per se. For this reason, it is becoming increasingly important to establish what effect such policies have and how they are achieved. This paper addresses this question, illustrating five ways in which change is understood (Fordist, evolutionary, ecological, community of practice and discourse-oriented) and then using this range of perspectives to explore how e-learning policy drives change (both organisational and pedagogic) within a selected higher education institution. The implications of this case are then discussed, and both methodological and pragmatic conclusions are drawn, considering the relative insights offered by the models and ways in which change around e-learning might be supported or promoted
Custo de produção - o caso do cará-da-costa.
bitstream/item/72339/1/CPAMN-COM.-TEC.-6-92.pd
Biometria, grau de umidade e número de sementes/Kg da espécie Euxylophora paraensis (Pau-amarelo).
bitstream/item/49394/1/fd110001.pdf1 folder
Ideal sweetness of mixed juices from Amazon fruits.
Sucos de frutas ?prontos para beber? representam grande fatia do mercado e importante alvo do desenvolvimento de produtos. A mistura de frutas pode trazer melhorias no aspecto sensorial e nutricional destas bebidas e aproveitar a diversidade de frutos exóticos da região Amazônica. Torna-se necessário, então, selecionar misturas de frutas e sua doçura ideal segundo a aceitação dos consumidores. Consumidores da cidade de Belém (Brasil) avaliaram cinco concentrações de açúcar usando escala do ideal de dois blends selecionados em teste de ordenação preferência. Para o blend cupuaçu-acerola-açaí, a concentração ótima de açúcar foi 9,5 g/100 mL; para blend graviola-camucamu-taperabé a concentração ótima foi 10,7 g/ 100 mL
Non-extensive processes associated with heating of the Galactic disc
We analyse the mechanisms ruling galactic disc heating through the dynamics
of space velocities , and , extracted from the Geneva-Copenhagen
catalogue. To do this, we use a model based on non-extensive statistical
mechanics, where we derive the probability distribution functions that quantify
the non-Gaussian effects. Furthermore, we find that the deviation at a
given stellar age follows non-random behaviour. As a result, the -index
behaviour indicates that the vertical component , perpendicular to the
Galactic plane, does not ``heat up'' at random, which is in disagreement with
previous works that attributed the evolution of to randomness. Finally, our
results bring a new perspective to this matter and open the way for studying
Galactic kinematic components through the eyes of more robust statistical
models that consider non-Gaussian effects.Comment: 7 pages, 3 figures, 2 tables. Accepted to EP
Produção integrada de melão nos polos Mossoró-Açu e Baixo Jaguaribe: diagnóstico das conformidades e não conformidades com os requisitos do sistema.
Área geográfica e levantamento de informações; Práticas e procedimentos utilizados na pré-colheita; Recursos naturais; Material propagativo; Implantação da cultura; Nutrição de plantas; Manejo do solo; Irrigação e drenagem; Manejo da planta; Proteção integrada da planta; Sistema de registro; Práticas e procedimentos utilizados na colheita e pós-colheita; Processos de empacotadoras.bitstream/CNPAT-2010/12002/1/Doc-122.pd
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