WtNTER 2006 I nstitutional money managers develop risk models and optimal portfolios to match a desired risk/reward profile. Utility functions express risk preferences and implicitly reflect the views of fund trustees or directors. Once a manager determines a target portfolio, maintaining this balance of assets is non-trivial. A manager must rebalance actively because different asset classes ca...

Background: Although the expansion of innovation in the industry has led to an increase in the fast of works, production and productivity, it has also imposed an increase in the incidence of musculoskeletal disorders. So, the aim of this study was determination the risk level of work posture by REBA and RULA method among workers of assembly line of a cosmetic manufacturing factory. Methods: Th...

Today industrial companies are subject to major and profound changes. It is constantly confronted with a world of ruthless competition that continually aims improve quality, cost, lead time. Each company works satisfy the requirements its customers do this, it improves performance controls manufacturing processes from reception raw materials suppliers shipment final product customer. In this pa...

background: ergonomics is a science that provides methods of creating reasonable adaption between occupation and worker by improving usability through consideration of job demands and human ability to satisfy them. a deep understanding of user’s thoughts on and attitudes toward utilizing a tool could improve its design. in the present study, two cushions designed particularly for one of car ind...

The intention in designing data structures with relaxed balance, such as chromatic search trees, is to facilitate fast updating on shared-memory asynchronous parallel architectures. To obtain this, the updating and rebalancing have been uncoupled, so extensive locking in connection with updates is avoided. In this paper, we prove that only an amortized constant amount of rebalancing is necessar...

Printed circuit boards (PCBs) are extensively used in diverse electronic products today. The placement process is generally the bottleneck in a PCB assembly line. Many researchers have indicated that an optimal component placement sequence reduces the cycle time of an assembly line with single placement machines. However, in current PCB assembly lines, more than one placement machine, including...