Digital Commons Network^™

Three Dimensional Graphics Software In Interactive Ellpack, John P. Bonomo, Wayne R. Dyksen

Department of Computer Science Technical Reports

No abstract provided.

A Comparison Of Two Evidential Reasoning Schemes, Sunny Lee

Department of Computer Science Technical Reports

No abstract provided.

Planar Linear Arrangements Of Outerplanar Graphs, Greg N. Frederickson, Susanne E. Hambrusch

Department of Computer Science Technical Reports

No abstract provided.

A Vectorized Source Algorithm For The Nodal Code Simulate-E, Charles A. Wemple

Department of Electrical and Computer Engineering Technical Reports

A vectorized source algorithm was developed to replace the existing calculation in the nodal core neutronics code SIMULATE-E. The code was developed for applications to LWR fuel management and was coded for optimal performance on the CDC-6000 series scalar computers. The code was adapted to the CYBER 205 vector computer at Purdue University for use on the CYBER scalar processor. Several automatic vectorization methods were applied unsuccessfully to the source calculation subroutine. The vectorized version resulted in an improvement of 60-70% in the computational speed compared to the original scalar version with no loss in computational accuracy.

Contour Tracking With Force Feedback, Shaheen Ahmad

Department of Electrical and Computer Engineering Technical Reports

In this paper we describe an algorithm to allow a manipulator to track a complex contour without having to teach or program any points on the contour. This is an important problem in many manufacturing situations, when a robot tool such as a deburring tool must follow a complex work piece contour. La such instances it is tedious to teach or program the manipulator to follow such contour additionally calibration of the manipulator or the workpart may be difficult. The algorithm we present has been experimentally demonstrated utilizing a force sensor, a five degree of freedom manipulator and a 68000 …

Mathematics For Visual Guidance Of Robots, Yiucheung Shiu, Shaheen Ahmad, Richard P. Paul

Department of Electrical and Computer Engineering Technical Reports

Vision can be used to position a robot relative to a known object or a known environment in 3D. If the object has enough feature points, one view is sufficient for determining the relative position between the object and the camera, otherwise, multiple views are required. We discuss the mathematics of viewpoint determination, using a combination of calibration matrix decomposition and space resection. The combined method has low noise sensitivity and does not require knowledge of camera parameters. If the object does not have enough features, multiple views are required to determine its position and orientation; an example of this …

Distributed Systems Based Upon A Functional Communication Model With A Timed Token Protocol, Dan C. Marinescu

Department of Computer Science Technical Reports

No abstract provided.

Applying Ai Techniques To Program Optimization For Parallel Computers, Ko-Yang Wang, Dennis Gannon

Department of Computer Science Technical Reports

No abstract provided.

50 Years Of The Joint Highway Research Project (Jhrp), Harold L. Michael

Purdue Road School

No abstract provided.

Cold, In-Place Recycling On State Road 38, Rebecca S. Mcdaniel

Purdue Road School

No abstract provided.

Cascading Divide-And-Conquer: A Technique For Designing Parallel Algorithms, Mikhail J. Atallah, Richard Cole, Michael T. Goodrich

Department of Computer Science Technical Reports

No abstract provided.

Some Experiments With Tcp/Ip Protocols Over An X.25 Network, John T. Korb, Craig E. Wills

Department of Computer Science Technical Reports

No abstract provided.

A Laboratory Experiment On Robot Contouring With Force Feedback, Shaheen Ahmad

Department of Electrical and Computer Engineering Technical Reports

In this paper we describe a laboratory experiment which is part of a laboratory orientated robotics class taken by seniors and first year graduate students. This experiment is designed to introduce students to real-time robot control system hardware and software. The experiment attempts to fortify material covered m an introductory (non laboratory orientated) class on robotics. The issues covered by this experiments include: kinematics, dynamics, robot drive mechanisms, interfacing of sensors and force control aspects. Students were also required to learn many aspects of real time programming for control applications. We document this entire experiment so it may be reorganized …

Sensors: A Key To Successful Robot-Based Assembly, Shaheen Ahmad

Department of Electrical and Computer Engineering Technical Reports

Computer controlled robots offer a number of significant advantages in manufacturing and assembly tasks. These include consistent product reliability and the ability to work in harsh environments. The programmable nature of robotic automation allows the possibility of applying them to a number of tasks. In particular, significant savings can be expected in batch production, if robots can be applied to produce numbers of products successfully without plant re-tooling. Unfortunately, despite considerable progress made in robot programming [Lozano-Perez 83] [Paul 81] ;Ahmad 84] [Graver et al. 84] [Bonner & Shin 82] and in sensing [Gonzalez & Safabakhsh 82] [Fu 82] [Hall …

Parallel And Vector Problems On The Flex/32, H S. Mcfaddin, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

A Software Metrics Survey, S. D. Conte, Herbert E. Dunsmore, V. Y. Shen, W. M. Zage

Department of Computer Science Technical Reports

No abstract provided.

Efficient Parallel Algorithm For Robot Forward Dynamics Computation, C. S. G. Lee, P. R. Chang

Department of Electrical and Computer Engineering Technical Reports

Computing the robot forward dynamics is important for real-time computer simulation of robot arm motion. Two efficient parallel algorithms for computing the forward dynamics for real-time simulation were developed to be implemented on an SIMD computer with n. processors, where h is the number of degrees-of-freedom of the manipulator. The first parallel algorithm, based on the Composite Rigid-Body method, generates the inertia matrix using the parallel Newton-Euler algorithm, the parallel linear recurrence algorithm, and the row-sweep algorithm, and then inverts the inertia matrix to obtain the joint acceleration vector desired at time t. The time complexity of this parallel algorithm …

Experimental And Theoretical Studies On Design Calculations For Latent Heat Storage, Dieter Lindemann

Open Access Theses

Research was conducted to obtain design data of latent heat-of-fusion thermal energy storage (LHTES) devices. The devices studied utilize a porous medium (PM) to increase the effective conductivity of the storage system. Therefore the melting and freezing process is accelerated. Metal shavings and metal spheres were used as porous media and water as the phase change medium (PCM). A simple experimental method to measure the conductivity of a water-metal mixture or ice-metal mixture was applied to obtain conductivity data. These measurements can be considered fairly accurate because measured conductivity of pure water and of pure ice agreed very well with …

Investigation On Latex-Modified Bridge Deck Overlay Concrete, Sidney Diamond

JTRP Technical Reports

No abstract provided.

Computational Package For Predicting Pile Stresses And Capacity : Executive Summary, Ahmad Amr Darrag

JTRP Technical Reports

No abstract provided.

Evaluation Of The Coordination Of Weigh-In-Motion Truck Data In Indiana (Fy86 Rtap Wim Project) : Interim Report, John Daniel Riverson, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

Pile Capacity Predictions Using Static And Dynamic Load Testing, Ahmad Amr Darrag

JTRP Technical Reports

No abstract provided.

Effects Of Asphalt Composition And Compaction On The Performance Of Asphalt Pavement Mixtures, Leonard E. Wood, A. G. Altschaeffl

JTRP Technical Reports

No abstract provided.

Development Of An Overlay Design Procedure For Flexible Pavements In Indiana, Jay K. Lindly, Thomas D. White

JTRP Technical Reports

No abstract provided.

Traffic Control In Maintenance And Construction Areas, Gilbert T. Satterly

Indiana Local Technical Assistance Program (LTAP) Publications

This booklet is a revised chapter of the Handbook of Traffic Control Practices for Low-Volume Roads in Indiana, Publication No. H-84-3 by the Highway Extension and Research Project for Indiana Counties and Cities.

The purpose of this chapter is to provide information and guidelines to those persons involved in providing traffic control devices to warn and guide motorists and pedestrians in construction and maintenance areas on two-lane two-way roadways. This booklet is to serve as a supplement to the Indiana Manual on Uniform Traffic Control Devices for Streets and Highways.

Handbook For Traffic Control In Construction And Maintenance Areas, Herpicc

Indiana Local Technical Assistance Program (LTAP) Publications

This booklet is a field reference for maintenance employees to assist in setting up the traffic control.

Training Teachers For The Writing Lab: A Multidimensional Perspective, Ronald Adams, Robert Child, Muriel Harris, Kathleen Henriott

The Writing Center Journal

No abstract provided.

Peer Tutoring: A Contradiction In Terms?, John Trimbur

The Writing Center Journal

No abstract provided.

Terminal Writing In The Writing Lab?, Anne Wright

The Writing Center Journal

No abstract provided.

Getting Smart With Computers: Computer-Aided Heuristics For Student Writers, Fred Kemp

The Writing Center Journal

No abstract provided.