Growing demand for more mobile access to data is only matched by the growth of large and complex data. The availability and scalability of cloud resources when combined with techniques of caching and distributed computation provide tools to address these problems, but bring up new multi-dimensional optimization challenges such as execution time, monetary cost, and power consumption. The plethor...

An underlying cloud computing feature, outsourcing of resources, makes the service-level agreement (SLA) a critical factor for quality of service (QoS), and many researchers have addressed the question of how an SLA can be evaluated. Lately, security SLAs have also received much attention to guarantee security in a user perspective and provide optimal and efficient security service in the secur...

In this paper a novel numerical approach is presented for solving the transient incompressible fluid flow problems with free surfaces in generalized two-dimensional curvilinear coordinate systems. Solution algorithm is a combination of implicit real-time steps and explicit pseudo-time steps. Governing fluid flow equations are discretized using a collocated finite-volume mesh. Convective terms a...

Expansion of ablation plumes created by intense’ultrashort lasers is determined by various complicated physical processes which have very different spatial and time scales. Since complete simulation by one model is practically impossible, we suggest using two models describing initial and final stages that can be matched at an intermediate time. The proposed modeling procedure connects laser pa...

A perturbation of relative humidity is used as a trigger to start the convection in a two-dimensional numerical model of a cumulus cloud. The effects of varying the width and depth of the perturbation are studied. The rate of growth; eventual cloud height, liquid water content, and updraft strength are strongly dependent on depth of the impulse; but for realistically shallow depths, these value...

A multi-layer one-dimensional vertical model of the upper soil, vegetation and lower atmosphere is developed and implemented. This model includes explicit representations of the heat and moisture diffusion both in the soil and in the atmosphere, and computations of various mass and energy fluxes at the soil-air, vegetation-air and soil-root interfaces. Four models are run in parallel to compute...

The emergence of the cloud storage as infrastructure for serving large amounts of data over the WAN suggests new storage/compute paradigms. We propose expanding the cloud storage from only storing data to directly producing value from the data by executing computational modules storlets close to where the data is stored. This paper describes the Storlet Engine, an engine to support computations...