2,286 research outputs found
POEM: Pricing Longer for Edge Computing in the Device Cloud
Multiple access mobile edge computing has been proposed as a promising
technology to bring computation services close to end users, by making good use
of edge cloud servers. In mobile device clouds (MDC), idle end devices may act
as edge servers to offer computation services for busy end devices. Most
existing auction based incentive mechanisms in MDC focus on only one round
auction without considering the time correlation. Moreover, although existing
single round auctions can also be used for multiple times, users should trade
with higher bids to get more resources in the cascading rounds of auctions,
then their budgets will run out too early to participate in the next auction,
leading to auction failures and the whole benefit may suffer. In this paper, we
formulate the computation offloading problem as a social welfare optimization
problem with given budgets of mobile devices, and consider pricing longer of
mobile devices. This problem is a multiple-choice multi-dimensional 0-1
knapsack problem, which is a NP-hard problem. We propose an auction framework
named MAFL for long-term benefits that runs a single round resource auction in
each round. Extensive simulation results show that the proposed auction
mechanism outperforms the single round by about 55.6% on the revenue on average
and MAFL outperforms existing double auction by about 68.6% in terms of the
revenue.Comment: 8 pages, 1 figure, Accepted by the 18th International Conference on
Algorithms and Architectures for Parallel Processing (ICA3PP
Impact of biomass burning on Ocean water quality in Southeast Asia through atmospheric deposition: Field observations
10.5194/acp-10-11323-2010Atmospheric Chemistry and Physics102311323-1133
Environments of Redshift Survey Compact Groups of Galaxies
Redshift Survey Compact Groups (RSCGs) are tight knots of N >= 3 galaxies
selected from the CfA2+SSRS2 redshift survey. The selection is based on
physical extent and association in redshift space alone. We measured 300 new
redshifts of fainter galaxies within 1 h^{-1} Mpc of 14 RSCGs to explore the
relationship between RSCGs and their environments. 13 of 14 RSCGs are embedded
in overdense regions of redshift space. The systems range from a loose group of
5 members to an Abell cluster. The remaining group, RSCG 64, appears isolated.
RSCGs are isolated and distinct from their surroundings to varying degrees, as
are the Hickson Compact Groups. Among the 13 embedded RSCGs, 3 are distinct
from their general environments (RSCG 9, RSCG 11 and RSCG 85).Comment: 35 pages, including 10 figures and 5 tables, accepted for publication
in the Astronomical Journa
Equilibration and Dynamic Phase Transitions of a Driven Vortex Lattice
We report on the observation of two types of current driven transitions in
metastable vortex lattices. The metastable states, which are missed in usual
slow transport measurements, are detected with a fast transport technique in
the vortex lattice of undoped
2H-NbSe. The transitions are seen by following the evolution of these
states when driven by a current. At low currents we observe an equilibration
transition from a metastable to a stable state, followed by a dynamic
crystallization transition at high currents.Comment: 5 pages, 4 figure
Sterling's Past, Dollar's Future: Historical Perspectives on Reserve Currency Competition
This paper provides an historical perspective on reserve currency competition and on the prospects of the dollar as an international currency. It questions the conventional wisdom that competition for reserve-currency status is a winner-take-all game, showing that several currencies have often shared this role in the past and arguing that innovations in financial markets make it even more likely that they will do so in the future. It suggests that the dollar and the euro are likely to share this position for the foreseeable future. Hopes that the yuan could become a major international currency 20 or even 40 years from now are highly premature.
Power System Load Modeling Using A Weighted Optimal Linear Associative Memory (Olam)
Power system load models are very powerful tools, which have a wide range of applications in the electric power industry. These uses include scheduling system maintenance, monitoring load management policies, helping with the generator commitment problem by providing short-term forecasts, and aiding system planning [4]. Further, Power System Load Modeling is a technique used to model a power system and other essentials for the assessment of stability. In today’s datacenters, power consumption is a major issue. Storage usually typically comprises a large percentage of a datacenter’s power. Therefore, without mentioning that managing, understanding, and reducing storage, power consumption is an essential aspect of any efforts that address the total power consumption of datacenters. Moreover, according to [16], power system load models have a wide range of applications in the electric power industry including load management policy monitoring, such as aiding with system planning by providing long-term forecasts, short-term forecasts, and others including assisting with the generator commitment problem
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