Filters: Collection:"ir_uspace"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 226 |  | Wiessner, Pauline W. | Vines of complexity - egalitarian structures and the institutionalization of inequality among the Enga | The initial stages of the institutionalization of hierarchical social inequalities remain poorly understood. Recent models have added important perspectives to "adaptationist" approaches by centering on the agency of "aggrandizers" who alter egalitarian institutions to suit their own ends through de... | Egalitarian structures; Political evolution; Social d | 2002-04 |
| 227 |  | Digre, Kathleen B.; Warner, Judith E. A.; Bernstein, Paul S.; Alder, Stephen C. | Vitamin A in the cerebrospinal fluid of patients with and without idiopathic intracranial hypertension | We quantified vitamin A in the cerebrospinal fluid of patients with idiopathic intracranial hypertension, elevated intracranial pressure of other causes and normal intracranial pressure. Vitamin A could be detected by high-pressure liquid chromatography in most of the specimens. There was a signific... | Chromatography, High Pressure Liquid; Headache | 2002-11 |
| 228 |  | Mishchenko, Eugene | Zero-bias anomaly in two-dimensional electron layers and multiwall nanotubes | The zero-bias anomaly in the dependence of the tunneling density of states n (e) on the energy e of the tunneling particle for two- and one-dimensional multilayered structures is studied. We show that for a ballistic two-dimensional (2D) system the first-order interaction correction to density of s... | Spin-orbit coupling; Coulomb interaction | 2002-05 |
| 229 |  | Zhdanov, Michael S. | 3-D magnetic inversion with data compression and image focusing | We develop a method of 3-D magnetic anomaly inversion based on traditional Tikhonov regularization theory. We use a minimum support stabilizing functional to generate a sharp, focused inverse image. An iterative inversion process is constructed in the space of weighted model parameters that acce... | 2002-01-01 | |
| 230 |  | Lefohn, Aaron; Whitaker, Ross T. | A GPU-based, three-dimensional level set solver with curvature flow | Level set methods are a powerful tool for implicitly representing deformable surfaces. Since their inception, these techniques have been used to solve prob- lems in fields as varied as computer vision, scientific visualization, computer graphics and computational physics. With the power and flexi... | GPU-based; Level set solver | 2002-12-11 |
| 231 |  | Thompson, Cynthia A. | A personalized system for conversational recommendations | Increased computing power and theWeb have made information widely accessible. In turn, this has encouraged the development of recommendation systems that help users find items of interest, such as books or restaurants. Such systems are more useful when they personalize themselves to each user?s p... | Adaptive Place Advisor; Recommendation systems | 2002-06-26 |
| 232 |  | Henderson, Thomas C. | Agent-based engineering drawing analysis | Interpretation of paper drawings has received a good deal of attention over the last decade. Related areas such as direct interpretation of human drawings (HCI), search and indexing of graphics databases, and knowledge representation in the domain of graphics and drawing understanding have also s... | Interpretation; Human drawings; HCI; Graphic databases | 2002-02-04 |
| 233 |  | Willemsen, Peter; Gooch, Amy A. | An experimental comparison of perceived egocentric distance in real, image-based, and traditional virtual environment using direct walking tasks | In virtual environments, perceived egocentric distances are often underestimated when compared to the same distance judgments in the real world. The research presented in this paper explores two possible causes for this reduced distance perception in virtual environments: (1) real-time computer g... | Egocentric distances; Virtual environments | 2002-02-12 |
| 234 |  | Stark, Michael M.; Martin, William; Cohen, Elaine; Lyche, Tom; Riesenfeld, Richard F. | B-splines for physically-based rendering | Although B-spline curves and surfaces have enjoyed a long established place in the graphics community as constructive modeling tools, the use of B-spline approximation techniques has received relatively little attention in rendering. In this work we explore the use of 4D and 5D tensor product B-s... | B-spline curves; Rendering algorithms | 2002-01-09 |
| 235 |  | Angelucci, Alessandra; Lund, Jennifer S. | Circuits for local and global signal integration in primary visual cortex | Contrast-dependent changes in spatial summation and contextual modulation of primary visual cortex (V1) neuron responses to stimulation of their receptive field reveal long-distance integration of visual signals within V1, well beyond the classical receptive field (cRF) of single neurons. To identif... | Primary Visual Cortex; Extrastriate Cortex; Feed-back Connections; Lateral Connections; SUrround Modulation; Macaque | 2002-10-01 |
| 236 |  | White, Paul H. | Clinical validation and cognitive elaboration: signs that encourage sustained recycling | Three field experiments coupled the clinical psychology concept of validation with Elaboration Likelihood Model-Heuristic-Systematic Model theorizing to increase the influence of persuasive messages on aluminum can recycling. Signs that validated students' complaints that aluminum can recycling was ... | Psychology; recycled products; refuse, disposal; clinical psychology; field experiments | 2002-08-01 |
| 237 |  | Harrison, Reid R. | CMOS imager with on-chip temporal filtering for motion pre-processing | Robust motion detection algorithms such as the motion energy model require temporal filtering at the pixel level. We have designed and tested a CMOS imager with integrated, pixel-level temporal filtering necessary for motion detection. This temporal filtering enhances transients and provides a ... | 2002-01-01 | |
| 238 |  | Zhdanov, Michael | Contraction integral equation method in three-dimensional electromagnetic modeling | The integral equation method has been proven to be an efficient tool to model threedimensional electromagnetic problems . Owing to the full linear system to be solved, the method has been considered effective only in the case of models consisting of a strongly limited number of cells. However, recen... | 2002-01-01 | |
| 239 |  | Kukathas, Chandran | Cultural contradictions of socialism | While no one has yet announced the death of capitalism, reports of its imminent demise have been as numerous as they have been exaggerated. Such reports have usually been bolstered by thoughtful analyses of the fundamental contradictions of capitalism, which was expected to come sliding-if not crash... | Economic systems; Social organization | 2002-11-22 |
| 240 |  | Capecchi, Mario R. | Developmental defects of the ear, cranial nerves and hindbrain resulting from targeted disruption of the mouse homeobox gene Hox-1.6. | Gene targeting in mouse embryo-derived stem cells has been used to generate mice with a disruption in the homeobox gene Hox-1.6. Mice heterozygous at the Hox-1.6 locus appear normal, whereas Hox-1.6-/Hox-1.6- mice die at or shortly after birth. These homozygotes exhibit profound defects in the forma... | Chromosome Mapping; Genetic Vectors; Mice, Inbred C57BL | 2002-06-27 |
| 241 |  | Thompson, William B.; Willemsen, Peter; Gooch, Amy A.; Creem-Regehr, Sarah Hope | Does the quality of the computer graphics matter when judging distances in visually immersive environments? | In the real world, people are quite accurate judging distances to locations in the environment, at least for targets resting on the ground plane and distances out to about 20m. Distance judgments in visually immersive environments are much less accurate. Several studies have now shown that in vis... | Visually immersive environments | 2002-12-05 |
| 242 |  | Eckhoff, David W. | Drought happens: get used to it! Will technology help us to survive? | Drought is not the most popular subject in the world. Actually, as opposed to death, I think there are some bright spots in the drought mitigation future. I will review some of these in this lecture, but I'm also going to discuss some of the downsides of drought, because you can't have one without t... | Wastewater reclamation; Tiered water rates | 2002-09-10 |
| 243 |  | Capecchi, Mario R. | Duplication of the Hoxd11 gene causes alterations in the axial and appendicular skeleton of the mouse. | The Hox genes encode a group of transcription factors essential for proper development of the mouse. Targeted mutation of the Hoxd11 gene causes reduced male fertility, vertebral transformation, carpal bone fusions, and reductions in digit length. A duplication of the Hoxd11 gene was created with th... | Animals; Bone Development; Forelimb; Gene Expression Regulation, Developmental | 2002-09-01 |
| 244 |  | Stringfellow, Gerald B. | Effect of surfactant Sb on carrier lifetime in GaInP epilayers | Samples of Ga0.52In0.48P grown on (001) GaAs with small amounts of surfactant Sb were investigated using time-resolved photoluminescence. All samples show a luminescence that may be fit to a two-stage exponential decay with a fast and a slow lifetime. For growth without Sb (Sb/III(v)(0), the sample ... | Semiconductor ternary alloys; Epitaxial layer; Microstructures | 2002-01-01 |
| 245 |  | Downes, Stephen M. | Evolution of agency and other essays (book review) | Reviews the book 'The Evolution of Agency and Other Essays,' by Kim Sterelny. | Agent, Philosophy;; Books, nonfiction | 2002-11-13 |
| 246 |  | McDirmid, Sean; Hsieh, Wilson C.; Flatt, Matt | Expressive modular linking for object-oriented languages | In this paper we show how modular linking of program fragments can be added to statically typed, object-oriented (OO) languages. Programs are being assembled out of separately developed software components deployed in binary form. Unfortunately, mainstream OO languages (such as Java) still do not ... | Modular linking; Program fragments | 2002-10-11 |
| 247 |  | Sekercioglu, Cagan | Forest fragmentation hits insectivorous birds hard | Habitats around the world, especially in the tropics, are being fragmented at a rapid rate, causing a tremendous loss of biodiversity[1]. For example, 12% of the approximately 10,000 bird species are threatened with extinction in the next 10 to 100 years, and another 8% are near-threatened[2]. This ... | 2002-01-01 | |
| 248 |  | Morelli, Robert | Formal aspects of anonymity | We present a formal definition of anonymity in the context of concurrent processes. The definition is given in category theoretic terms. Moreover, the concept of a split cofibration is shown to both simplify the analysis of anonymity as well as to increase the framework's expressiveness. Because ... | Anonymity; Concurrent processes | 2002-01-15 |
| 249 |  | Yang, Yue; Gopalakrishnan, Ganesh; Lindstrom, Gary E. | Formalizing the Java Memory Model for multithreaded program correctness and optimization | Standardized language level support for threads is one of the most important features of Java. However, defining and understanding the Java Memory Model (JMM) has turned out to be a big challenge. Several models produced to date are not as easily comparable as first thought. Given the growing inte... | Java Memory Model; JMM; Multithreaded program | 2002-04-02 |
| 250 |  | Tasdizen, Tolga; Whitaker, Ross T. | Geometric surface processing via normal maps | The generalization of signal and image processing to surfaces entails filtering the normals of the surface, rather than filtering the positions of points on a mesh. Using a variational framework, smooth surfaces minimize the norm of the derivative of the surface normals? i.e. total curvature. Pen... | Geometric surface processing; Surface models | 2002-01-17 |