Modeling and optimal solving of supply chain management problems lead to efficient decision making in strategic planning and supply chain operations, resulting in a competitive advantage. Today, with the planning of a sustainable supply chain, in addition to achieving economic goals, it is possible to meet social and environmental objectives and considerations. This research deal with sustainab...

A 69-year-old woman with angina had a lesion in the left lower lobe on chest film. Angiography revealed coronary artery disease in three vessels. Combined off pump coronary artery bypass grafting (CABG) and left lower lobectomy were performed through median sternotomy. This approach avoids complications due to staged operations and cardiopulmonary bypass (CPB). This report shows that simultaneo...

cardiovascular disease is the leading reason of morbidity in older people. coronary artery bypass graft (cabg) surgery is the most common type of operations in world. this study was designed to characterize comparison of early clinical outcome following on pump vs. off pump in patients over 70 years old with triple vessels disease and severe left ventricle dysfunction. 80 patients were divided ...

In this paper, the sustainability of public debt is interpreted as the result of the interaction of fiscal policy with the economic environment, and not as a statistical concept as in most of the recent literature. If debt must not explode over time, policy makers have to respond to the changing conditions in the macroeconomic environment. This paper defines the conditions which will ensure com...

This bulletin is based on research conducted by Professor Gavin Wood and Dr Melek Cigdem at the AHURI Research Centre—RMIT University, and Ms Deb Batterham and Professor Shelley Mallett at Hanover Welfare Services. The research examined, for the first time, the geography of homelessness in Australia and its relationship to potential structural drivers of homelessness (specifically housing and l...

PREFACE 1022 CHAPTER I. The sources of errors in a computation 1.1. The sources of errors. (A) Approximations implied by the mathematical model. (B) Errors in observational data. (C) Finitistic approximations to transcendental and implicit mathematical formulations. (D) Errors of computing instruments in carrying out elementary operations: "Noise." Round off errors. "Analogy" and digital comput...

a facility layout problem is concerned with determining the best position of departments, cells, or machines on the plant. an efficient layout contributes to the overall efficiency of operations. it’s been proved that, when system characteristics change, it can cause a significant increase in material handling cost. consequently, the efficiency of the current layout decreases or is lost and it ...

A natural way to deal with multiple, partially conflicting objectives is turning all the objectives but one into budget constraints. Many classical optimization problems, such as maximum spanning tree and forest, shortest path, maximumweight (perfect) matching, maximum weight independent set (basis) in a matroid or in the intersection of two matroids, become NP-hard even with one budget constra...