introduction sarcheshmeh copper mine is regarded as the second largest copper deposit in the world. this is one of the largest industrial-mining complexes in the world and the largest producer of copper in iran. this complex plays an important role in iran’s economy. in 2012, this complex created employment for about 8000 people in iran and produced 203065 tons of copper cathodes. however, high...

Maintenance costs of Information Systems (ISs) are high and growing. Systems of poor quality demand more maintenance resources than systems of good quality. The quality of software can be measured when it is maintained. By improving the quality of maintenance prone modules future maintenance costs may be lowered for those modules. In this article we will present a case study of porting a measur...

One kind of mid-term production system, aggregate production planning, identifies the optimum production plan for each production period. The goal of aggregate production planning is to forecast future demand swings. On the other hand, maintenance system identifies the proper time for preventive maintenance and restrains from break downs and reduces maintenance costs. Due to the importance of t...

Metabolic costs of growth and maintenance were determined from the relationship M (metabolism) = m + nG (growth), where m is the metabolic rate at the feeding level at which growth is zero. In the past, the slope n was interpreted as indicating the metabolic costs of growth, and the costs of maintenance that arise with the increase in body mass were disregarded. These costs are included in n. I...

Maintenance costs of Information Systems (ISs) are high today and are growing. Part of the costs come from low software quality. The software quality can be measured when it is maintained. By improving the quality of maintenance prone modules future maintenance costs may be curtailed. In this article we will discuss how to measure software quality and we will also present a prototype that has b...

Lowering costs for software maintenance, development and reuse is a great challenge. Strategies like the 3 schema architecture for databases has shown to lower maintenance and development costs of databases. For a similar purpose an architecture has been developed over the last 10 years for object-oriented systems. This architecture is now named the COIR architecture and has helped in lowering ...

BACKGROUND Multiple myeloma (MM) is a cancer caused by malignant plasma cells that accumulate mostly in the bone marrow. In Canada, the most common maintenance therapy options after autologous stem cell transplant (ASCT) are bortezomib and lenalidomide. OBJECTIVE To determine the incremental cost between bortezomib and lenalidomide maintenance therapies for patients with MM post ASCT. METHO...

Introduction: Optimization of waste collection systems can reduce waste management costs. In this study, optimization of the waste collection system of district 3 of Yazd municipality of Iran has been investigated using underground containers. Materials and Methods: In this research, after collecting information and performing field inspections, the statistical and raster information obtained ...