The essential factor for the recent manufacturing companies is to develop a variety of products within short timeframes. Therefore, the flexible manufacturing techniques are rapidly growing to compete the markets globally. A number of factors contribute in organizational ability to achieve flexibility and one of which is the use of fixtures to increase the pace of production. A fixture is like ...

in fact the most suitable method for finding the load bearing capacity of a member under the axial load or axial load and bending is make use of the interaction diagrams. to analysis and design the hollow circular, square and rectangular high strength concrete (hsc) column shapes, a linear strain variation was assumed in the cross-section height of the members and then the static equilibrium eq...

The problem of generation of triangle-tiled pictures that are two-dimensional figures tiled by isosceles right triangles of the same size, is investigated. Grammars called context-free triangle-tiled picture grammars (CFttPG) that generate such figures making use of context-free type rules, are proposed. The special case that all rules of such a grammar are regular, is studied. In the framework...

The two-dimensional Single Large Object Placement Problem (SLOPP) problem consists of determining a cutting pattern of a set of n small rectangular piece types (little object) on a rectangular stock plate (large object) of length L and width W, as to maximize the sum of the profits of the pieces to be cut. Each piece type i, i = 1, . . ., m, is characterized by a length li, a width wi, a profit...

Dimensional control of the work-piece in steel industry is of important interest. The main aspects in overcoming the thickness control are variations in material strength due to variations in chemical composition, work-piece temperature, reduction and the strain rate applied to the work-piece. In this paper based on the main parameters affecting the rolling force an attempt been made to give a ...

The use of haptic virtual fixtures is a potential tool to improve the safety of robotic and telerobotic surgery. They can “push back” on the surgeon to prevent unintended surgical tool movements into protected zones. Previous work has suggested generating virtual fixtures from preoperative images like CT scans. However these are difficult to establish and register in dynamic environments. This ...

We consider a rectangular covering problem, where a rectangular support P is covered by k rectangular pieces Ci, for i=1, 2, ..., k, without gaps or overlapping. We intend to cover the support P with the k pieces in a certain order so that, at the moment of the placement of the piece Ci, the northern and western borders of this piece are completely covered. Starting from a graph representation ...

Here we present a method for high-precision drilling using an industrial robot with high-bandwidth force feedback, which is used for building up pressure to clamp-up an end-effector to the work-piece surface prior to drilling. The focus is to eliminate the sliding movement (skating) of the end-effector during the clamp-up of the end-effector to the work-piece surface, an undesired effect that i...

The nature of those problems can vary widely. One model might be as simple as a rectangular form with photo-realistic textures applied to the polygons to give the illusion of complexity. Another model might approach completeness, with the geometry of all architectural features, even finer-grain details like doorknobs and plumbing fixtures, included. Ultimately, the fidelity of the finished mode...

Maxillary defects occur due to surgical treatment of benign and malignant tumors, congenital malformation, and trauma. Prosthetic rehabilitation in such patients is influenced by the size and location of the defect. The most common of all intraoral defects are seen in the maxilla, in the form of an opening into the maxillary sinus and nasopharynx. These defects create disabilities in speech, de...