Filters: Date: "1985" Collection: "ir_uspace"
1 - 25 of 7
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
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Ailion, David Charles | Commensurability and defect-induced phason gaps in incommensurate systems | The phason energy gap has been observed to increase on going from the incommensurate to higher-order commensurate phases in the "devil's staircase" compound [N(CH3)4]2ZnCl4. The gap was determined via the phason-induced 1 4N spin-lattice relaxation contribution, which was obtained from the variati... | Phasons; Commensurate; Incommensurate; Lattices; Modulation | 1985 |
| 2 |
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Mattis, Daniel C. | Tricritical point in random-field Ising model | The numerical investigation of the random-field Ising model by Houghton, Khurana, and Seco1 has revealed a number of interesting features concerning the three-dimensional Ising model in a random external field Bt. Earlier, Aharony2 had already found that even in a mean-field approximation the b... | Random external field; Tricritical points; Gaussian distribution | 1985 |
| 3 |
 |
Davidson, Diane W. | Experimental study of diffuse competition in harvester ants | Experiments carried out over a 5-yr period in the Chihuahuan Desert support the a priori prediction of diffuse competition between two species of harvester ants. Despite dietary overlap between a large species {Pogonomyrmex rugosus) and a small species (Pheidole xerophila), the large species facilit... | Chihuahuan Desert; Ants; Facilitation; Resource allocation; Granivory | 1985 |
| 4 |
 |
Bhanu, Bir | Recognition of 2-D occluded objects and their manipulation by PUMA 560 robot | A new method based on a cluster-structure paradigm is presented for the recognition of 2-D partially occluded objects. This method uses the line segments which comprise the boundary of an object in the recognition process. The length of each of these segments as well as the angle between successive ... | PUMA 560 robot; Cluster-structure paradigm; 2-D partially occluded objects | 1985 |
| 5 |
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Bhanu, Bir | Segmentation of complex outdoor scenes | A new simpler approach to image segmentation via recursive region splitting and merging is presented. Unlike other techniques the kernel of splitting is based on a generalization of a two class gradient relaxation method and merging uses a statistical analysis of variance. | Image segmentation; Outdoor scenes; Recursive region splitting; Segmentation algorithm | 1985 |
| 6 |
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Cohen, Elaine | A new local basis for designing with tensioned splines | Recently there has been a great deal of interest in the use of "tension" parameters to augment control mesh vertices as design handles for piecewise polynomials. A particular local cubic basis called p-splines, which has been termed a "generalization of B-splines", has been proposed as an appropriat... | Tensioned splines | 1985 |
| 7 |
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Lawton, Evert C. | Development of guidelines for construction control of pile driving and estimation of pile capacity | The work upon which this report is based was supported by the Washington State Department of Transportation and the U. S. Department of Transportation, Federal highway Administration. | 1985 |
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