Rules, regulations and policy statements quite frequently contain nested sequences of normative modalities as in, for example: • The database manager is obliged to permit the deputy-manager to authorise access for senior departmental staff. • Parking on highways ought to be forbidden. Marcus (1966) Accordingly, a knowledge-representation language for such sentences must be able to accommodate n...

Outline • the nesting problem • geometric operations • industrial example • the Fafner system • current status • results • conclusions

A number of organizations are placing increased attention on the retention of high quality employees. In this paper, we examine the relationship between intention to quit and human resource management, employee voice, and organizational cost cutting. The results suggest that a high commitment human resource strategy, a positive workplace climate, the presence of a grievance procedure to address...

Cutting and packing problems appear in many industrial settings where larger pieces are cut into smaller ones in order to produce items or products that are required by other industries or customers, e.g., paper, steel and fiber industries. A solution for the cutting problem consists in determining a group of patterns and their frequencies, that is, the number of times that a pattern is cut to ...

The nesting problem is a two-dimensional cutting and packing problem where the small pieces to cut have irregular shapes. The variant of the problem that we are going to deal with, which naturally arises in several industrial production processes (textile, garment, metalware, etc), considers only one big rectangular piece, the plate, with fixed width and infinite length. The objective will be t...

Metalworking equipment is designed to modify a sheet, rod, or block of metal material in order to shape it for a specific application. This equipment can operate on the metal by bending it, drilling through it, or by cutting it. For small-scale operations, many tools require a significant amount of manual input. Unless the operator has extensive training and experience, the manual input may not...

For the first time, an improved hierarchical genetic algorithm for sheet cutting problem which involves n cutting patterns for m non-identical parallel machines with process constraints has been proposed in the integrated cutting stock model. The objective of the cutting scheduling problem is minimizing the weighted completed time. A mathematical model for this problem is presented, an improved...

This study focuses on developing fully functional cutting stock software by utilizing an improved multi-phase heuristic algorithm to find the optimal solution for the cutting material. Issues which commonly appear in real-world cutting stock applications are also discussed

This paper presents an approach for solving a new real problem in Cutting and Packing. At its core is an innovative mixed integer programme model that places irregular pieces and defines guillotine cuts. The two-dimensional irregular shape bin packing problem with guillotine constraints arises in the glass cutting industry, for example, the cutting of glass for conservatories. Almost all cuttin...

Working with an integer bilinear programming formulation of a one-dimen-sional cutting-stock problem, we develop an ILP-based local-search heuristic. The ILPs holistically integrate the master and subproblem of the usual price driven pattern-generation paradigm, resulting in a unified model that generates new patterns in situ. We work harder to generate new columns, but we are guaranteed that n...