Data placement is a key factor for high performance database systems. This is particularly true for parallel database systems where data allocation must support both I/O parallelism and processing parallelism within complex queries and between independent queries and transactions. Determining an effective data placement is a complex administration problem depending on many parameters including ...

One of the key applications of operational research in health systems management is to improve the mechanism of resource allocation and program planning in order to increase the system efficiency. This study seeks to offer an innovative method for the planning and scheduling of health service units with the aim of reducing the patients' Length of Stay (LOS) in the Cardiac Surgery Ward of Razavi...

This paper presents a portable framework to profile memory allocation in standard Java Virtual Machines. We extended our exact profiler JP, which generates a method call tree (MCT) for each thread in the system, in order to store information concerning object allocation in the MCT. Our primary design goals were to use platform-independent metrics for memory allocation and to minimize the extra ...

A global sourcing network consists of a set of suppliers located globally to satisfy the demands of an international factory network. The design of a global sourcing network consists of two interrelated decisions: supplier selection and order allocation. The supplier selection is a strategic decision that involves an one time capital investment in developing the selected suppliers. The order al...

Research on specification and scheduling of workflows has concentrated on temporal and causality constraints, which specify existence and order dependencies among tasks. However, another set of constraints that specify resource allocation is also equally important. The resources in a workflow environment are agents such as person, machine, software, etc. that execute the task. Execution of a ta...

Background In order to meet the challenges presented by increasing demand and scarcity of resources, healthcare organizations are faced with difficult decisions related to resource allocation. Tools to facilitate evaluation and improvement of these processes could enable greater transparency and more optimal distribution of resources.   Methods The Resource Allocation Performance Assessment Too...

Modern systems of risk management in financial institutions require a process of estimation of the amount of capital that is needed to cover losses arising from various types of risk and its allocation to business units in order to measure their risk-adjusted performance. In this paper we describe the structure of operational risk economic capital estimation model suitable for implementation of...

In this paper, we study the subcarriers and power joint allocation on the uplink of multiuser OFDM systems. We propose two subcarrier allocation schemes to improve the uplink capacity: Exhausted Best Channel Allocation(EBCA) and Rounded Best User Allocation(RBUA). The basic idea of EBCA is that subcarriers choose the user, while in RBUA users choose subcarriers. In order to improve the uplink c...

As a kind of intelligent communication technology, the characteristic of dynamic spectrum allocation of cognitive radio provides feasible scheme for sharing with the spectrum resources among the primary user and secondary users, which solves the current spectrum resource scarcity problem. In this paper, we comprehensively explored the cognitive radio spectrum allocation models based on game the...