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Novel Representation (novel + representation)

Distribution by Scientific Domains
Chemistry40%

Selected Abstracts

ReduceM: Interactive and Memory Efficient Ray Tracing of Large Models

COMPUTER GRAPHICS FORUM, Issue 4 2008
Christian Lauterbach
We present a novel representation and algorithm, ReduceM, for memory efficient ray tracing of large scenes. ReduceM exploits the connectivity between triangles in a mesh and decomposes the model into triangle strips. We also describe a new stripification algorithm, Strip-RT, that can generate long strips with high spatial coherence. Our approach uses a two-level traversal algorithm for ray-primitive intersection. In practice, ReduceM can significantly reduce the storage overhead and ray trace massive models with hundreds of millions of triangles at interactive rates on desktop PCs with 4-8GB of main memory. [source]

The emergence of a novel representation from action: evidence from preschoolers

DEVELOPMENTAL SCIENCE, Issue 2 2010
Rebecca Boncoddo
Recent work in embodied cognition has proposed that representations and actions are inextricably linked. The current study examines a developmental account of this relationship. Specifically, we propose that children's actions are foundational for novel representations. Thirty-two preschoolers, aged 3.4 to 5.7 years, were asked to solve a set of simple gear-system problems. Participants' motions and verbalizations were coded to establish the strategies they used. The preschoolers initially solved the problems by simulating the turning and pushing of the gears. Subsequently, most participants discovered a new representation of the problems: the turning direction of the gears alternates. Results show that the number of actions that embodied alternation information, during their simulation of the system, predicted the later emergence of the higher-order representation (i.e. that the gears alternate turning direction). Thus, it appears that the preschoolers discovered a new representation based on their own actions. These results are consistent with the developmental embodiment hypothesis: actions are central to the emergence of new representations. [source]

New synthesis framework for the optimization of complex distillation systems

AICHE JOURNAL, Issue 3 2002
Piyush B. Shah
A new synthesis framework screens and examines complex distillation sequences. Conventional superstructure developments are replaced in favor of a novel representation that assumes the form of a supertask model. The supertask is based on simple tasks that accommodate for basic sequences. Hybrid tasks account for complex columns and sloppy splits. Discrete instances of simple tasks are combined with hybrid transformations to optimize operating conditions. The optimization problem is formulated as a simple MILP problem that is possible to solve to global optimality. The proposed representation can develop different nonconventional and novel designs featuring fully integrated columns, parallel sequences, and multiple-effect columns. The approach is illustrated with several literature and industrial problems. In all cases solutions are reported in the form of nonconventional designs that perform as optimal or near-optimal schemes. [source]

The role of the tangent bundle for symmetry operations and modulated structures

ACTA CRYSTALLOGRAPHICA SECTION A, Issue 3 2010
Philippe Kocian
An equivalence relation on the tangent bundle of a manifold is defined in order to extend a structure (modulated or not) onto it. This extension affords a representation of a structure in any tangent space and that in another tangent space can easily be derived. Euclidean symmetry operations associated with the tangent bundle are generalized and their usefulness for the determination of the intrinsic translation part in helicoidal axes and glide planes is illustrated. Finally, a novel representation of space groups is shown to be independent of any origin point. [source]

The emergence of a novel representation from action: evidence from preschoolers

DEVELOPMENTAL SCIENCE, Issue 2 2010
Rebecca Boncoddo
Recent work in embodied cognition has proposed that representations and actions are inextricably linked. The current study examines a developmental account of this relationship. Specifically, we propose that children's actions are foundational for novel representations. Thirty-two preschoolers, aged 3.4 to 5.7 years, were asked to solve a set of simple gear-system problems. Participants' motions and verbalizations were coded to establish the strategies they used. The preschoolers initially solved the problems by simulating the turning and pushing of the gears. Subsequently, most participants discovered a new representation of the problems: the turning direction of the gears alternates. Results show that the number of actions that embodied alternation information, during their simulation of the system, predicted the later emergence of the higher-order representation (i.e. that the gears alternate turning direction). Thus, it appears that the preschoolers discovered a new representation based on their own actions. These results are consistent with the developmental embodiment hypothesis: actions are central to the emergence of new representations. [source]