The manufacturing and installation of xtures in a factory can be costly, especially for high-volumeproduction runs. Once xtures are installed, part shape can vary due to: (1) tolerance variations because of inherent im-precision in manufacturing processes, and (2) redesign. Variations of type (1) occur constantly and are usually small; variations of type (2) can be large but occur at few distin...

Computer-Aided Geometric Design modelers are now based on powerful mathematical curve and surface models, but there is still a considerable need for efficient tools to handle, analyze and modify these objects. Designing product shapes using geometric operations on free-form curves and surfaces is still a tedious task. Moreover, designers would prefer to use meaningful tools to concentrate on de...

The maneuvering problem involves two tasks. The first, called the geometric task, is to force the system output to converge to a desired path continuously parametrized by a scalar θ. The second task, called the dynamic task, is to satisfy a desired dynamic behavior along the path. In this paper, this dynamic behavior is further specified as a speed assignment for θ(t). While the main concern is...

This paper presents an algorithm for automatically computing the planar patterns of custom-made assistive medical braces, which are employed to restrict the motion of the joints (such as wrist and knee) that suffer from musculoskeletal disorders caused by repetitive strain injuries. An elastic brace is manufactured by warping a planar elastic fabric pattern. With a specified material, different...

Current systems for Computer Aided Architectural Design are of limited use for the early phase of a design. We give a speci cation of a new system, in which we strive for a more natural and intuitive interaction. A key element is geometric analysis. From the input of the user, implicit geometric and structural relations are derived, which are used during subsequent interaction.

in early islamic era, architecture in khorasan was followed the common features of early islamic architecture style; such as simplicity in construction and ornament. in the later periods, especially in seljuq dynasty, the application of brick, stucco, tiling and inscription had been used more in architectural ornament. then, in the short period under the khwarizmshahid dynasty in khorasan, two-...

This paper describes an integrated computer environment for the structural design of new power lines, the evaluation of existing lines, and their long term management. The detailed content of the data files that need to be accessed is presented. Implementation of commonly used design and archiving functions on a workstation should help design optimization, reduce design mistakes and resul consi...

When asked to state the safety of a particular design, highway engineers are at a loss to give a single meaningful measure, as is possible in structural or geotechnical engineering. The question of a meaningful road safety design measure led to a method to estimate the margin of safety and safety index for isolated highway components. The method uses the basic highway alignment design equations...

Pigeons were trained to learn an instrumental oddity-from-sample discrimination involving visual forms. One group, the "few examples" group, dealt with 5 patterns in 40 different combinations. Another group, the "many examples" group, dealt with 20 patterns in 160 different combinations. After both groups had reached asymptotic performance and had learned to operate under partial reinforcement ...

Highway planning is a process wherein a highway network con­ sidered adequate to meet both the present and future traffic demands of an auto-oriented, ever-growing populace is visualized. It is also the process in which a procedure designed to implement the plan should be formulated. The first step in the planning process is the determination of high­ way needs. The elimination of these needs r...