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12. American Society of Colon and Rectal Surgeons 95th Annual Convention Podium and Poster Abstracts June 9–14, 1996 Seattle, Washington

Author

Obrand, D., Gordon, P. H., Rowley, S., Grace, R. H., Rai, S., Moran, M. R., Rai, A. M., Farouk, R., Lee, P. W. R., Edwards, J., Thorne, M., MacDonald, A. W., Duthie, G. S., Monson, J. R. T., Shabahang, M., Brenner, R., Wright, A., Montgomery, E., Trock, B., Buras, R., Schumaker, L., Nolla, J., Buffan, A., Uskokovic, M., Nauta, R., Evans, S., Velázquez, O. C., Zhou, D., Seto, R. W., Choi, J., Jabbar, A., Breen, F., Rombeau, J. L., Casillas, S., Dietz, D. W., Brand, M. I., Vladisavljevic, A., Jones, S. C., Milsom, J. W., Stuntz, M., Wilmoth, G., Ong, J., Stabile, B., Stamos, M. J., Kahn, H., Alexander, A., Rakinic, J., Nagle, D., Fry, R., Simons, A. J., Kerr, R., Toms, C., Groshen, S., Ross, R., Morris, M., Beart, R., Ortega, A., Anthone, G., Lucha, P., Rosen, L., Stasik, J., Olenwine, J., Riether, R., Khubchandani, I., Ogunbivi, O., Birnbaum, E., Fleshman, J., Kodner, I., McLeod, R. S., Geerts, W., Sniderman, K., Greenwood, C., Gregoire, R., Taylor, B., Silverman, R., Atkinson, K., Burnstein, M., Marshall, J., Burul, C., Anderson, D., Ross, T., Wilson, S., Barton, P., Maetani, S., Onodera, H., Morimoto, H., Imamura, M., Hyams, D. M., Mamounas, E., Petrelli, N., Rockette, H., Jones, J., Wolmark, N., Sofo, L., Ratto, C., Valentini, V., Ippoliti, M., Nucera, P., Merico, M., Bellantone, R., Doglietto, G. B., Crucitti, F., Goes, R., Simons, A., Gunderson, L., Grado, G., Streeter, O., Sun, J. H., Decanini-Garza, P., Kim, D. G., Wong, W. D., Rothenberger, D. A., Madoff, R. D., Madlensky, L., Berk, T., Bapat, B., Redston, M., Gallinger, S., Cohen, Z., Winde, G., Schmid, K. W., Brandt, B., Müller, R., Osswald, H., Jang, Y., Steinhagen, R., Heimann, T., Schnitzler, M., Blackstein, M., McLeod, R., Devesa, J. M., Madrid, J. M. Fernandez, Enriquez, J. M., Geerdes, B. P., Heineman, E., Konsten, J., Baeten, C. G. M., Michot, F., Lehur, P. A., Denis, P., Grise, P. H., Leborgne, J., Teniere, P., Buzelin, J. M., Stebbing, J. F., Brading, A. F., Mortensen, N. J. McC, Gunn, J., Gardiner, A., Abdullah, N., Nyam, D. C. N. K., Pemberton, J. H., Ilstrup, D., Lund, J. N., Scholefield, J. H., Stamm, L., Matzel, K. E., Stadelmaier, U., Dünne, A., Hohenberger, W., Sala, C., Garcia-Granero, E., Molina, M. J., Garcia, J. V., Lledo, S., Ternent, C. A., Shashidharan, M., Blatchford, G. J., Christensen, M. A., Thorson, A. G., Sentovich, S. M., Jensen, L. L., Lowry, A. C., Zaheer, S., Reilly, W. T., Tsang, C., Singer, D., Richard, C. S., Stern, H. S., Oliveira, L., Daniel, N., Bernstein, M., DeMarta, D., Weiss, E. G., Nogueras, J. J., Wexner, S. D., Keighley, M. R. B., Korsgen, S., Agachan, F., Kim, D. -S., Goldberg, S. M., Durham, R. M., Pruitt, G., Longo, W. E., Marchesa, P., Oliart, S., Goldblum, J., Fazio, V. W., Rantis, P. C., Daniel, G. L., Vernava, III, A. M., Becker, J. M., Marie, G. St., Ferzoco, S., Franklin, M., Rosenthal, D., Goldstein, E. T., Bass, E. M., DelPino, A., Tan, A., Pearl, R., Orsay, C., Sher, M. E., Sands, L. R., Påhlman, Lars, Hewett, P. J., Thomas, W. M., King, G., Eaton, M., Allendorf, U. D. F., Bessler, M., Whelan, R. L., Trokel, M., Laird, D., Nowygrod, R., Treat, M. R., Vukasin, P., Steele, G., Weston, L., Allendorf, J. D. F., Sellers, G., Joo, J. S., Bruce, C. J., Coller, J. A., Murray, J. J., Schoetz, Jr., D. J., Roberts, P. L., Schoetz, D., Bockler, M., Rosenblatt, M., Malhorta, S., Roberts, P., Murray, J., Coller, J., Rusin, L., Liu, C. D., Newton, T. R., Zinner, M. J., Ashley, S. W., McFadden, D. W., Tusek, D. L., Church, J. M., Strong, S. A., Grass, J., Steinhart, A. H., Greenberg, G. R., Siminovich, K., Blair, J. E., Cruz, C., Prabhakar, L. P., Laramee, C., Nelson, H., Dozois, R. R., Ozuner, G., Hull, T., Fazio, V., Navaro, G., Bauer, J. J., Gorfine, S. R., Gelemt, I. M., Harris, M. T., Kreel, I., Marcello, P. W., Rusin, L. C., Veidenheimer, M. C., Ogunbiyi, O. A., Thibault, C., Sagar, P., Wolff, B. G., Lee, F., Lee, E. C., Pennoyer, W. P., Vignati, P. V., Cohen, J., MacRae, H. M., O'Connor, B., Ton, E., Hain, J. M., Perez-Ramirez, J. J., Spencer, M. P., Gemlo, B. T., Neto, J. A. Reis, Quilici, F. A., Cordeiro, F., Reis, Jr., J. A., Neto, C. I. Reis, Gottesman, L., Tjandra, J., Takano, M., Kuromizu, J., Tsuji, Y., Lee, C. S., Ferrara, A., Levy, J. R., Larach, S. W., Krecker, M., Williamson, P. R., Wong, D. W., Sarmiento, J. M., Burgart, L. J., Frizelle, F. A., Ilstrup, D. M., Salem, R., Smith, L. E., Rooney, P. S., Chapman, M. A. S., Steele, R. J. C., Koren, R., Gal, R., Kyzer, S., Chaimoff, CH., Rodríguez-Bigas, M. A., Mahoney, M. C., Weber, T. K., Petrelli, N. J., Ault, G., Ceron, O., Conti, P., Hadfield, M. B., Turnbull, L. W., Nicholson, A. A., Horsman, A., Shibata, D., Sentovich, S., Hyland, W., Busse, P., Bleday, R., Allendorf, J., Whelan, R., Horvath, K., Treat, M., Wronski, M., Arbit, E., Bilsky, M., Galicich, J. H., Miller, A. S., Lewis, W. G., Williamson, M. E. R., Sagar, P. M., Holdsworth, P. J., Johnston, D., Smith, A. H., Marchetti, F., Thompson-Fawcett, M. W., Warren, B. F., Mortensen, N. J. M., Bouchard, S., Belliveau, P., Trudel, J., Zinsmeister, A. R., Schleck, C. D., McIntyre, P. B., Hanson, R. B., Read, T. E., Dominguez, J. M., Hyman, N. H., Beck, D. E., Dayton, M. T., Stryker, S. J., Wolf, B. G., Young-Fadok, T. M., Meagher, A., Benn, P. L., Takao, Y., Chen, F. C., Wu, J., Milsom, J., Stein, B. L., Vasilevsky, C. A., Hartley, J. E., Cureshi, A., Sellers, G. J., Van, D., Ludwig, K. A., Garcia-Ruiz, A., Espat, N. J., Rao, G. N., Drew, P. J., Pfeifer, J., Park, U. C., Gonzalez, A., Okamoto, T., Konishi, F., Tsukamoto, T., Senba, S., Kashiwagi, H., Kojima, M., Togashi, T., Kanazawa, K., Yoon, W. H., Kang, Y. N., Hong, K. H., Park, H. D., Koo, S. H., Song, K. S., Kim, J. C., Roh, S. A., Park, K. C., Jessup, J. M., Changchien, C. R., Wang, J. Y., Hsu, K. C., Chen, J. S., Tang, R., You, Y. T., Ho, Y. S., Guttman, R., Nelson, R., Sardinha, T. G. S., Gilliland, J., Kroll, M., Lee, E., Wexler, J., Hudzinski, D., Glass, D., Wolff, B. D., King, D. W., Talley, N., Chen, W. S., Lin, W. C., Hsu, H., Wrightson, W. R., Galandiuk, S., LaRocca, R., Myers, S. R., Tada, M., Inoue, H., Tsubaki, M., Endo, M., Sobzcak, S., Welch, J. P., Cohen, J. L., Allen, L. W., Morrow, J. S., Behen, S. L., Smith, K. W., Cali, J. R., Bailey, H. R., Fucini, C., Elbetti, C., Messerini, L., Law, W. L., Butts, D. R., Max, E., Memon, M. A., Devine, J., Feeney, J., Talley, N. J., Stephenson, E. R., Ilahi, O., Koltun, W. A., Spellman, M., Rantis, R. C., Vernava, A. M., Parra, R. O., Breen, E., Hayes, P., Quinn, D., Whitlow, C. B., Opelka, F. G., Gathright, J. B., Golub, R. W., Maccabee, P. J., Combs, A. J., Grose, E. A., Taylor, B. M., Kozell, K., McGannon, E., Krogh, K., Nielsen, J., Djurhuus, J. C., Mosdal, C., Sabroe, S., Laurberg, S., Chen, M. F., Kerner, B. A., Khanduja, K. S., Wise, Jr., W. E., Padmanabhan, A., Meesig, D. M., Yasin, M. T., Aguilar, P. S., Ho, Y. H., Tan, M., Seow-Choen, F., Rustin, R. B., and Harmon, J. M.

Published
1996
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26. Polyharmonic wavelets based on Lagrangean functions

Author

Cohen, A, Merrien, JL, Schumaker, L, Bacchelli, B, Bozzini, M, Rabut, C, BACCHELLI, BARBARA, BOZZINI, MARIA TUGOMIRA, Rabut, C., Cohen, A, Merrien, JL, Schumaker, L, Bacchelli, B, Bozzini, M, Rabut, C, BACCHELLI, BARBARA, BOZZINI, MARIA TUGOMIRA, and Rabut, C.

Abstract

In this paper we adress the construction of polyharmonic prewavelets in low dimensions, extending the approach of Riemenschneider and Scen [10] to the non-othonormal setting. Such prewavelets are derived from the polyharmonic Lagrangean spline and its dual. We provide formula for an efficient construction of the functions, filters, and the associated multiresolution analysis.

Published
2007

28. Automatic Semi-Regular Mesh Construction from Adaptive Distance Fields

Author

Bremer, Peer Timo, Lyche, T.1, Mazure, M.-L., Schumaker, L. L., Bremer, Peer Timo, Porumbescu, Serban D., Hamann, Bernd, Joy, Ken, Bremer, Peer Timo, Lyche, T.1, Mazure, M.-L., Schumaker, L. L., Bremer, Peer Timo, Porumbescu, Serban D., Hamann, Bernd, and Joy, Ken

Abstract

This paper describes a method to construct semi-regular meshes for a surface S defined by the zero set of a trivariate function F(x,y,z), representing a distance eld definition of S. An adaptive distance field (ADF) definition of S is obtained by constructing, adap- tively, an octree decomposition of F's domain. The vertices of the octree-based denition of S lie either on the positive or negative side of S (or on S). Octree cells that are intersected by S are identified, and the faces of these cells that lie on the outside of S are projected onto S. The result is a quadrilateral mesh to which various procedures are applied that lead to an improved mesh containing a much smaller number of extraordinary vertices, i.e., non-valence-four vertices.

Published
2002

29. Simpifications of Closed Triangulated Surfaces Using Simulated Annealing

Author

Bremer, Peer Timo, Lyche, T.1, Schumaker, L. L., Bremer, Peer Timo, Hamann, Bernd, Kreylos, Oliver, Wolter, F.-E., Bremer, Peer Timo, Lyche, T.1, Schumaker, L. L., Bremer, Peer Timo, Hamann, Bernd, Kreylos, Oliver, and Wolter, F.-E.

Abstract

We describe a method to approximate a closed surface tri- angulation using simulated annealing. Our approach guarantees that all vertices and triangles in an approximating surface triangulation are within a user-defined distance of the original surface triangulation. We introduce the idea of atomic envelopes to guarantee error bounds that are independent of the surface geometry. Atomic envelopes also allow approximation distance to be di�erent for di�erent parts of the surface. We start with the original triangulation and perturb it randomly and improve an approximating triangulation by locally changing the triangulation, using a simulated annealing algorithm. Our algorithm is not restricted to using only original vertices; the algorithm considers every point inside the envelope triangulation as a possible position. The algorithm attempts to minimize the total number of vertices needed to approximate the original surface triangulation within the prescribed error bound.

Published
2001

30. Multivariate spline methods in surface fitting

Author

Guseman, L. F., Jr and Schumaker, L. L

Subjects
Numerical Analysis
Abstract

The use of spline functions in the development of classification algorithms is examined. In particular, a method is formulated for producing spline approximations to bivariate density functions where the density function is decribed by a histogram of measurements. The resulting approximations are then incorporated into a Bayesiaan classification procedure for which the Bayes decision regions and the probability of misclassification is readily computed. Some preliminary numerical results are presented to illustrate the method.

Published
1984

31. Spline Classification Methods

Author

Guseman, L. F., Jr and Schumaker, L. L

Subjects
Numerical Analysis
Abstract

The use of spline functions in the development of classification algorithms is discussed. A method is formulated for producing spline approximations to univariate density functions when each density function is described by a histogram of measurements. The resulting approximations are then incorporated into a Bayesian classification procedure for which the probability of misclassification can be readily computed. Some preliminary numerical results are presented to illustrate the method.

Published
1983

32. Fitting surfaces to scattered data

Author

Schumaker, L. L

Subjects
Earth Resources And Remote Sensing
Abstract

A variety of numerical methods for fitting a function to data given at a set of points scattered throughout a domain in the plane are surveyed. Four classes of methods are discussed: (1) global interpolation; (2) local interpolation; (3) global approximation; and (4) local approximation. Also, two-stage methods and contouring are discussed. The surfaces constructed include polynomials, spline functions, and rational functions, among others.

Published
1982

36. Triangulations from repeated bisection

Author

Hamann, Bernd, Daehlen, M.1, Lyche, T., Schumaker, L. L., Hamann, Bernd, Jordan, Benjamin, Hamann, Bernd, Daehlen, M.1, Lyche, T., Schumaker, L. L., Hamann, Bernd, and Jordan, Benjamin

Abstract

We present a method for the iterative refinement of triangulations. Given a coarse triangulation of the compact domain of a bivariate function, we present a refinement strategy bsed on approximation error. The triangulation is used to compute a best linear spline approximation, using the term best approxiamation in an integral least squares sense. We improve an approximation by identifying the triangle with largest error and refine the triangulation by bisecting this triangle.

Published
1998

38. Irregularity detection from noisy data with wavelets

Author

Laurent, PJ, Le Méhauté, A, Schumaker, L, Bozzini, M, De Tisi, F, Rossini, M, BOZZINI, MARIA TUGOMIRA, ROSSINI, MILVIA FRANCESCA, Laurent, PJ, Le Méhauté, A, Schumaker, L, Bozzini, M, De Tisi, F, Rossini, M, BOZZINI, MARIA TUGOMIRA, and ROSSINI, MILVIA FRANCESCA

Published
1994

47. Surface Compression Using a Space of C1 Cubic Splines with a Hierarchical Basis.

Author

Hong, D. and Schumaker, L. L.

Subjects
*SPLINE theory, *INTERPOLATION, *GEOMETRIC surfaces, *MULTILEVEL models, *WAVELETS (Mathematics)
Abstract

A method for compressing surfaces associated with C1 cubic splines defined on triangulated quadrangulations is described. The method makes use of hierarchical bases, and does not require the construction of wavelets. [ABSTRACT FROM AUTHOR]

Published
2004
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48. The dimension of bivariate spline spaces of smoothness r for degree d≥4 r+1.

Author

Alfeld, Peter and Schumaker, L.

Abstract

We consider spaces of piecewise polynomials of degree d defined over a triangulation of a polygonal domain and possessing r continuous derivatives globally. Morgan and Scott constructed a basis in the case where r=1 and d≥5. The purpose of this paper is to extend the dimension part of their result to r≥0 and d≥4 r+l. We use Bézier nets as a crucial tool in deriving the dimension of such spaces. [ABSTRACT FROM AUTHOR]

Published
1987
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