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The authors are investigating reverse engineering for reconstructing the shape of simple mechanical parts. Currently, preliminary B-rep models can be created by fitting surfaces to point clouds obtained by scanning an actual part using a 3D laser scanner. The resulting model, although valid, is often not suitable for purposes such as redesign. This is… (More)

- Bruce I. Mills, Frank C. Langbein, A. David Marshall, Ralph R. Martin
- Symposium on Solid Modeling and Applications
- 2001

The authors are developing an automated reverse engineering system for reconstructing the shape of simple mechanical parts. B-rep models are created by fitting surfaces to point clouds obtained by scanning an object using a 3D laser scanner. The resulting models, although valid, are often not suitable for purposes such as redesign because expected… (More)

- Frank C. Langbein, Bruce I. Mills, A. David Marshall, Ralph R. Martin
- Shape Modeling International
- 2001

Boundary representation models reconstructed from 3D range data suffer from various inaccuracies caused by noise in the data and the model building software. The quality of such models can be improved in a beautification step, which finds regular geometric patterns approximately present in the model and imposes a maximal consistent subset of constraints… (More)

- Frank C. Langbein, Bruce I. Mills, A. David Marshall, Ralph R. Martin
- Symposium on Solid Modeling and Applications
- 2001

Current reverse engineering systems are able to generate simple valid boundary representation (B-rep) models from 3D range data. Such models suffer from various inaccuracies caused by noise in the input data and algorithms. The quality of reverse engineered geometric models can potentially be improved by finding candidate shape regularities in such an… (More)

- Bruce I. Mills, Martha W. Evens, Reva Freedman
- International Conference on Information…
- 2004

One important strategy in Socratic tutoring is the directed line of reasoning, in which the tutor asks a series of directive questions, to help the student follow a particular approach to the problem. The questions may contain useful information to assist the student in making the argument. If the student gets stuck, the tutor often supplies a hint. The… (More)

- Frank C. Langbein, Bruce I. Mills, A. David Marshall, Ralph R. Martin
- International Journal of Shape Modeling
- 2001

Current reverse engineering systems are able to generate simple valid boundary representation (B-rep) models from 3D range data. Such models suffer from various inaccuracies caused by noise in the input data and algorithms. Reverse engineered geometric models may be beautified by finding approximate geometric regularities in such a model, and imposing a… (More)

- BYUNG-IN CHO, Byung-In Cho, +11 authors YoonHee Lee
- 2000

2000 iii ACKNOWLEDGMENT I am very grateful to my parents for their endless love and encouragement. I am deeply grateful to my wife for her love, understanding and patience. I love you, my children, JaeHyung and YounKyung. I have received a great deal of encouragement, advice and help from people associated with the CIRCSIM-Tutor research group. I am… (More)

- F. C. Langbein, C. H. Gao, B. I. Mills, A. D. Marshall, R. R. Martin
- SM '04
- 2004

Boundary representation models reverse engineered from 3D range data suffer from various inaccuracies caused by noise in the measured data and the model building software. Beautification aims to improve such models in a post-processing step solely working with the boundary representation model. The improved model should exhibit topological and geometric… (More)

- Frank C. Langbein, Bruce I. Mills, A. David Marshall, Ralph R. Martin
- J. Comput. Inf. Sci. Eng.
- 2001

Current reverse engineering systems can generate boundary representation (B-rep) models from 3D range data. Such models suffer from inaccuracies caused by noise in the input data and algorithms. The quality of reverse engineered geometric models can be improved by finding candidate shape regularities in such a model, and constraining the model to meet a… (More)

- Bruce I. Mills
- FLAIRS Conference
- 2001

CIRCSIM-Tutor Version 3 includes a reactive planner, APE the Atlas Planning Engine. By using this planner, we are able to effectively respond to dynamic changes in the environment of tutoring students to solve problems in cardiovascular physiology dealing with the regulation of blood pressure. Use of the reactive planner allows us to adapt to student… (More)