Filters: Collection: "ir_uspace"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 176 |
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Mathews, V. John | A new carrier frequency estimator for modem signals | ABSTRACT A novel carrier frequency estimation scheme for a relatively broad class of voiceband data signals (modem signals) is presented in this paper. The class of signals being studied includes different types of phase-shift-keyed (PSK) and frequency-shift-keyed (FSK) signals. The frequency estim... | 1988 | |
| 177 |
 |
Chamberlin, Ralph V. | A new genus of theridiid spiders in which the male develops only one palpus | The discovery of the male of Theridion fordum Keyserling, reveals characteristics for that species which set it off as genericallv different, from Theridion proper. The erection of a new genus is thus found necessary for this species; and several other species which are closely related to it natural... | 1934-04 | |
| 178 |
 |
Ehleringer, James R. | Burning coal seams in southern Utah: a natural system for studies of plant responses to elevated CO2 | In the Burning Hills and Smoky Mountains of southern Utah (USA), coal deposits exposed to the surface have been ignited by lightning and have been burning for periods of years to over a century. We examined one of these sites, where the below-ground combustion of this low-sulfur coal releases gases ... | Coal fires; Elevated CO2; Isotope ratios; Atriplex confertifolia; Salsola iberica; Gutierrezia sarothrae | 1997 |
| 179 |
 |
Ikits, Milan | Coregistration of pose measurement devices using nonlinear least squares parameter estimation | Multimodal visual haptic user interfaces can be made more effective by accurately colocating the workspaces of their components. We have developed a coregistration technique for pose measurement devices based on nonlinear least squares parameter estimation. A reduced quaternion parameterization is u... | Coregistration; Pose measurement; Haptic interfaces | 2000 |
| 180 |
 |
Erickson, J. Alan; Ashwood, Edward R. | Evaluation of an enzyme-linked binding protein assay for hyaluronic acid and concentrations in hepatitis C infected patients | Serological hyaluronic acid (HA) has been proposed as a noninvasive alternative to liver biopsy for assessing the extent of liver fibrosis. Liver biopsy correctly identifies hepatic disease in about 65 to 75% of cases, being strongly dependent on the length of the biopsy obtained. Furthermore, hepat... | Hyaluronic Acid Concentration; Corgenix HA assay | 2005-07-21 |
| 181 |
 |
Gerig, Guido | Parametric regression scheme for distributions: analysis of DTI fiber tract diffusion changes in early Brain Development | Temporal modeling frameworks often operate on scalar variables by summarizing data at initial stages as statistical summaries of the underlying distributions. For instance, DTI analysis often employs summary statistics, like mean, for regions of interest and properties along fiber tracts for populat... | 2014-01-01 | |
| 182 |
 |
Schmidt, Meic H. | Pigmented villonodular synovitis associated with pathological fracture of the odontoid and atlantoaxial instability | PPigmented villonodular synovitis (PVNS) is a proliferative disorder of the synovium with a predisposition for the appendicular skeleton. Rarely PVNS can arise from the spine, where this disorder usually presents with localized or radicular pain secondary to involvement of the posterior elements. Th... | Atlantoaxial instability; Pigmented villonodular synovitis; Odontoid | 2007 |
| 183 |
 |
Cole, Edwin Randolph | The removal of unknown image blurs by homomorphic filtering | This report describes a homomorphic method for the estimation and removal of unknown image blurs, which are presumed to have been caused by a linear stationary system. Previous methods have required a more or less perfect a priori knowledge of the identity of the blur. the method described here requ... | Homomorphic filtering; Removal; Image blurs; Blurred image | 1974 |
| 184 |
 |
Gesteland, Raymond F.; Atkins, John F.; Baranov, Pavel V. | Diverse bacterial genomes encode an operon of two genes, one of which is an unusual class-I release factor that potentially recognizes atypical mRNA signals other than normal stop codons | ABSTRACT: Background: While all codons that specify amino acids are universally recognized by tRNA molecules, codons signaling termination of translation are recognized by proteins known as class-I release factors (RF). In most eukaryotes and archaea a single RF accomplishes termination at all three... | Class-I release factors; RF1; RF2; Bacterial genomes | 2006 |
| 185 |
 |
Regehr, John | Finding and understanding bugs in C compilers | Compilers should be correct. To improve the quality of C compilers, we created Csmith, a randomized test-case generation tool, and spent three years using it to find compiler bugs. During this period we reported more than 325 previously unknown bugs to compiler developers. Every compiler we tested w... | 2011-01-01 | |
| 186 |
 |
Kirby, Robert Michael | Verifying volume rendering using discretization error analysis | We propose an approach for verification of volume rendering correctness based on an analysis of the volume rendering integral, the basis of most DVR algorithms. With respect to the most common discretization of this continuous model (Riemann summation), we make assumptions about the impact of parame... | 2014-01-01 | |
| 187 |
 |
Regehr, John | Efficient memory safety for TinyOS | Reliable sensor network software is difficult to create: applications are concurrent and distributed, hardware-based memory protection is unavailable, and severe resource constraints necessitate the use of unsafe, low-level languages. Our work improves this situation by providing efficient memory an... | 2007-01-01 | |
| 188 |
 |
Jewell, Paul | The geology and geothermal setting of the Magic Reservoir Area, Blaine and Camas Counties, Idaho | The Magic Reservoir area straddles the Blaine- Camas county line in south-central Idaho, along the northern boundary of the central Snake River Plain. The rocks exposed at Magic Reservoir include a 5.8- million-year-old rhyolite flow, the Pliocene Square Mountain Basalt, multiple cooling units ... | 1982 | |
| 189 |
 |
Gesteland, Raymond F.; Letsou, Anthea; Ivanov, Ivaylo P.; Simin, Karl; Atkins, John F. | Drosophila gene for antizyme requires ribosomal frameshifting for expression and contains an intronic gene for snRNP Sm D3 on the opposite strand | Previously, a Drosophila melanogaster sequence with high homology to the sequence for mammalian antizyme (ornithine decarboxylase antizyme) was reported. The present study shows that homology of this coding sequence to its mammalian antizyme counterpart also extends to a 5* open reading frame (ORF... | Ornithine decarboxylase antizyme; Binding proteins | 1998 |
| 190 |
 |
Henderson, Thomas C. | Target localization and autonomous navigation using wireless sensor networks -a pseudogradient algorithm approach | Autonomous mobile robots (AMRs) operating in unknown environments face twin challenges: 1) localization and 2) efficient directed navigation. This paper describes a two-tiered approach to solving these challenges: 1) by developing novel wireless-sensor-network (WSN)-based localization methods and 2)... | 2014-01-01 | |
| 191 |
 |
Mcpherson, Brian James; Chapman, David S. | Thermal analysis of the southern Powder River Basin, Wyoming | Temperature and geologic data from over 3000 oil and gas wells within a 180 km x 30 km area that transect across the southern Powder River Basin in Wyoming, U.S.A., were used to determine the present thermal regime of the basin. Three-dimensional temperature fields within the transect, based on... | 1996 | |
| 192 |
 |
Chapman, David S. | Thermal analysis of the southern Powder River Basin, Wyoming | Temperature and geologic data from over 3000 oil and gas wells within a 180 km x 30 km area that transect across the southern Powder River Basin in Wyoming, U.S.A., were used to determine the present thermal regime of the basin. Three-dimensional temperature fields within the transect, based on... | Thermal analysis; Inversion; Bottom hole temperature | 1996-11 |
| 193 |
 |
Litwin, Christine M. | Anti-tuberculosis IgG antibodies as a marker of active mycobacterium tuberculosis disease | Anti-Mycobacterium tuberculosis IgG antibodies may aid in the diagnosis of active M. tuberculosis disease. We studied whether anti-M. tuberculosis IgG antibodies are elevated in active M. tuberculosis disease and assessed factors contributing to false positive and negative results. A retrospective s... | 2012-01-01 | |
| 194 |
 |
Schmidt, Meic H.; Brockmeyer, Douglas Lee; Dailey, Andrew T. | Surgical management of aneurysmal bone cysts of the spine | Object. Aneurysmal bone cysts of the spine are benign, highly vascular osseous lesions of unknown origin that may present difficult diagnostic and therapeutic challenges. They are expansile lesions containing thin-walled, blood-filled cystic cavities that cause bone destruction and sometimes spinal ... | Aneurysmal bone cyst; Spine tumor; Spinal fusion; Embolization | 2003 |
| 195 |
 |
Rogers, Alan R. | Doubts about isonymy | The method of isonymy, developed by Crow and Mange for estimating inbreeding from surname frequencies, requires an assumption that has not been appreciated: It is necessary to assume that all males in some ancestral generation, the founding stock, had unique surnames. Because this assumption is sel... | 1991 | |
| 196 |
 |
Mathews, V. John | Orthogonalization of correlated gaussian signals for volterra system identification | This letter presents a simple method for orthogonalizing correlated Gaussian input signals for identification of truncated Volterra systems of arbitrary order of nonlinearity P and memory length N. The procedure requires a Gram-Schmidt orthogonalizer for a vector containing N elements and some nonli... | 1995 | |
| 197 |
 |
Adler, Frederick R. | Plant signalling: The opportunities and dangers of chemical communication | The notion of chemical communication between plants and other organisms has gone from being viewed as a fringe idea to an accepted ecological phenomenon only recently. An Organized Oral Session at the August 2010 Ecological Society of America meeting in Pittsburgh examined the role of plant signall... | 2011 | |
| 198 |
 |
Sperry, John S. | Anatomy of the palm Rhapis excelsa, IX. Xylem structure of the leaf insertion | STEMS OF PERENNIAL PLANTS, particularly trees, represent a considerable investment in biomass. Trees can survive even under the most adverse conditions, but only if the hydraulic integrity of the stem is preserved. A very important and vulnerable part of the stem is the xylem. As water is pulled int... | Palm stems; Palm stem anatomy; Palm leaves; Leaf insertion; Vessel network; Vessel-length distribution; Primary vascular stem tissue; Hydraulic architechture; Water column | 1983 |
| 199 |
 |
Stevens, Kenneth | CAD directions for high performance asynchronous circuits | This paper describes a novel methodology for high performance asynchronous design based on timed circuits and on CAD support for their synthesis using Relative Timing. This methodology was developed for a prototype iA32 instruction length decoding and steering unit called RAPPID ("Revolving Asynchro... | 1999 | |
| 200 |
 |
Ehleringer, James R. | Carbon isotope ratios of Atacama Desert plants reflect hyperaridity of region in northern Chile | Leaf carbon isotope ratios were measured on plants from the coastal portions of the Atacama Desert at Pan de Azucar and Paposo, Chile. Most species possessed C3 photosynthesis, although there were several CAM species, indications of some facultative CAM species, and only one C4 species. The carbon i... | Atacama Desert; Carbon isotope ratio; Intercellular carbon dioxide concentration; Hyperaridity | 1998 |