background: manual material handling is one of the major health and safety hazards in industry. this study aims to assess the lifting tasks, before and after intervention using niosh lifting equation and manual handling assessment charts (mac). methods: this interventional study was performed in 2011 in a tile manufacturing industry in hamadan, located in the west of iran. the prevalence of mus...

modeling and wrench feasible workspace analysis of a spatial cable suspended robots is presented. a six-cable spatial cable robot is used the same as stewart robots. due to slow motion of the robot we suppose the motion as pseudostatic and kinetostatic modeling is performed. various workspaces are defined and the results of simulation are presented on the basis of various workspaces and applied...

obviously navigation is one of the most complicated issues in mobile robots.intelligent algorithms are often used for error handling in robot navigation. thispaper deals with the problem of inertial measurement unit (imu) error handling byusing extended kalman filter (ekf) as an expert algorithms. our focus is put onthe field of mobile robot navigation in the 2d environments. the main challenge...

One of the problems with current workflow systems is their limited support for dynamic environments and evolving product and process models. A 1997 study of trends in workflow management concluded that exception handling (i.e., dynamically modifiable processes) and object-oriented views of workflow definitions deserve “serious attention” from researchers [Moh98]. But why are dynamic models so i...

In this paper, we present a mechanism to specify and to validate consistency constraints in object oriented databases. Constraints are speciied using pre and post-conditions associated with an exception handling mechanism. During transaction run-time, we treat exceptions corresponding to errors (in this case, we use immediate exceptions which are processed immediately) or presumption of errors ...

This paper presents a new mathematical model for integrated dynamic cellular manufacturing systems and production planning that minimizes machine purchasing, intra-cell material handling, cell reconfiguration and setup costs. The presented model forms the manufacturing cells and determines the quantity of machine and movements  during each period of time. This problem is NP-hard, so a meta-heur...

The present paper investigates the reliability and sensitivity analysis of a coal handling unit of a thermal power plant using a probabilistic approach. Coal handling unit is the main block of a thermal power plant and it is necessary for a good function of a power plant that its power supply, which is dealt in coal handling unit, must function continuously without any obstacle. The configurati...

In an Augmented Reality (AR) system using a brick-based tangible user interface, we present and evaluate alternative techniques for scene navigation. Going from two-dimensional brick-based input to threedimensional navigation presents design issues. There are two fundamental methods for scene control: scene handling or viewpoint handling. The system has two views (plan and side), presenting act...