Use of gap (created by tree falls) and non-gap forest understory sites by migrating birds in central Illinois was studied during spring and autumn for three years (19781980). Fruit and understory foliage were concentrated in gaps. Birds that relied on these resources (foliage-gleaning insectivores, frugivores in autumn) used gaps more than non-gaps. Birds that fed on food other than fruit and f...

A challenging issue for network communication is to provide uninterrupted network services even when a link failure occurs. Path protection offers a promising solution by employing a link-disjoint secondary backup path to protect the primary path. Existing path protection mechanisms can be classified into 1+1 protection, 1:1 protection 1:N protection and M:N protection. However, their implement...

We study the problem of assigning resources in order to maximize the probability of resource utilization. This is a sensible design goal in many settings with shared resources. Each agent has private information about its value distribution for different assignments. A mechanism elicits information about value distributions, using this information to determine an assignment along with payments,...

Often resource selection functions (RSFs) are developed by comparing resource attributes of used sites to unused or available ones. We present alternative approaches to the analysis of resource selection based on the utilization distribution (UD). Our objectives are to describe the rationale for estimation of RSFs based on UDs, offer advice about computing UDs and RSFs, and illustrate their use...

Conventional approaches to execution of database queries on general purpose multiprocessors attempt to maximize system throughput using inter-query parallelism with a fixed number of processors. Standard uniprocessor optimization techniques are used to minimize execution time of individual queries, Our approach is to increase performance by utilizing intra-query parallelism as well as minimizin...

In this thesis report, we have a survey on state-of-the-art methods for modelling resource utilization of MapReduce applications regard to its configuration parameters. After implementation of one of the algorithms in literature, we tried to find that if CPU usage modelling of a MapReduce application can be used to predict CPU usage of another MapReduce application.

Integrated circuits have been in constant progression since the first prototype in 1958, with the semiconductor industry maintaining a constant rate of miniaturisation of transistors and wires. Up until about the year 2002, processor performance increased by about 55% per year. Since then, limitations on power, ILP and memory latency have slowed the increase in uniprocessor performance to about...

When resource consumers select among competing providers based on delayed information, inefficient oscillations in resource utilization can emerge. This paper describes an approach, based on selective stochastic resource request rejection, for dealing with this emergent dysfunction.

Customer order acceptance is an important process in make-to-order industries. Acceptance policies should operate such that a pre-specified delivery reliability is achieved, while maximizing resource utilization. By selecting orders with specific characteristics that maximize resource utilization, an important and often unforeseen effect occurs: the mix of orders changes such that the expected ...