2,326 research outputs found
Memory and Identity: how societies construct and administer their past?
The main interest of the debate on memory and collective (social) identity is the historical one. The richness of the various continents the participants come from, with their complexity and differences, should permit our debate to take in account the variety not only of theEuropean experience (traditionally linking society, nation and state together),but specially those of the emerging, complex, multicultural societies outside Europe's as well.The main interest of the debate on memory and collective (social) identity is the historical one. The richness of the various continents the participants come from, with their complexity and differences, should permit our debate to take in account the variety not only of theEuropean experience (traditionally linking society, nation and state together),but specially those of the emerging, complex, multicultural societies outside Europe's as well
Potencial de produção de biocarvão no Norte do Estado de Mato Grosso.
Muitas formas de processamento de resÃduos têm sido utilizadas, dentre elas, a pirólise para obtenção de biocarvão. Este trabalho apresenta o potencial da região Norte do Estado de Mato Grosso em reaproveitar resÃduos do processamento da madeira por meio da pirólise. Pretendeu-se levantar o montante de resÃduos produzidos na região, buscando alternativas para solucionar um problema regional, convertendo esse problema em alternativa para beneficiar o setor agrÃcola. Para levantar o montante de madeira processada foram utilizados os dados obtidos pelo Anuário EstatÃstico de Mato Grosso ? 2007. A região possui grande potencial de produção principalmente pela proximidade com as fontes produtoras de resÃduos e das áreas de aplicação. Estima-se que os resÃduos gerados na Região Norte de Mato Grosso possam produzir cerca de 123.600 Mg de biocarvão, equivalente a 86.500 Mg ano-1 de carbono. Quantidade equivalente à compensação de 317.200 Mg de CO2 emitido, além do carbono fixo na madeira processada
A flexible algorithm to offload DAG applications for edge computing
Multi-access Edge Computing (MEC) is an enabling technology to leverage new
network applications, such as virtual/augmented reality, by providing faster
task processing at the network edge. This is done by deploying servers closer
to the end users to run the network applications. These applications are often
intensive in terms of task processing, memory usage, and communication; thus
mobile devices may take a long time or even not be able to run them
efficiently. By transferring (offloading) the execution of these applications
to the servers at the network edge, it is possible to achieve a lower
completion time (makespan) and meet application requirements. However,
offloading multiple entire applications to the edge server can overwhelm its
hardware and communication channel, as well as underutilize the mobile devices'
hardware. In this paper, network applications are modeled as Directed Acyclic
Graphs (DAGs) and partitioned into tasks, and only part of these tasks are
offloaded to the edge server. This is the DAG application partitioning and
offloading problem, which is known to be NP-hard. To approximate its solution,
this paper proposes the FlexDO algorithm. FlexDO combines a greedy phase with a
permutation phase to find a set of offloading decisions, and then chooses the
one that achieves the shortest makespan. FlexDO is compared with a proposal
from the literature and two baseline decisions, considering realistic DAG
applications extracted from the Alibaba Cluster Trace Program. Results show
that FlexDO is consistently only 3.9% to 8.9% above the optimal makespan in all
test scenarios, which include different levels of CPU availability, a
multi-user case, and different communication channel transmission rates. FlexDO
outperforms both baseline solutions by a wide margin, and is three times closer
to the optimal makespan than its competitor
Eficiência Relativa de Agricultores Familiares na Produção de Leite.
O objetivo deste trabalho foi avaliar a eficiência relativa na produção de leite de uma amostra de agricultores familiares do Estado do Paraná, que estão sob orientação técnica de extensionistas participantes do Projeto Balde Cheio. A avaliação foi feita utilizando-se o Método de Envelopamento de Dados ? DEA. A média da eficiência da amostra analisada foi de 92% evidenciando que o grupo de produtores foi muito eficiente na gestão da tecnologia empregada e a importância do extensionista como agente de transferência de tecnologia
Exact solution of the full RMSA problem in elastic optical networks
Exact solutions of the Routing, Modulation, and Spectrum Allocation (RMSA)
problem in Elastic Optical Networks (EONs), so that the number of admitted
demands is maximized while those of regenerators and frequency slots used are
minimized, require a complex ILP formulation taking into account frequency-slot
continuity and contiguity. We introduce the first such formulation, ending a
hiatus of some years since the last ILP formulation for a much simpler RMSA
variation was introduced. By exploiting a number of problem and solver
specificities, we use the NSFNET topology to illustrate the practicality and
importance of obtaining exact solutions.Comment: This work has been submitted to the IEEE for possible publication.
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