UScholar Works
 
Filters: Date: "2002-01-01" Collection: ir_uspace
1 - 25 of 16
Number of results to display per page
CreatorTitleDescriptionSubjectDate
1 Zhdanov, Michael S.3-D magnetic inversion with data compression and image focusingWe 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
2 Harrison, Reid R.CMOS imager with on-chip temporal filtering for motion pre-processingRobust 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
3 Zhdanov, MichaelContraction integral equation method in three-dimensional electromagnetic modelingThe 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
4 Stringfellow, Gerald B.Effect of surfactant Sb on carrier lifetime in GaInP epilayersSamples 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; Microstructures2002-01-01
5 Sekercioglu, CaganForest fragmentation hits insectivorous birds hardHabitats 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
6 Regehr, JohnHow to rapidly prototype a real-time schedulerImplementing a new scheduling algorithm in an OS kernel is often an important step in scheduling research because it permits evaluation of the algorithm's performance on real workloads. However, developing a new scheduler is not a trivial task because it requires sophisticated programming skills and...2002-01-01
7 Sekercioglu, CaganImpacts of birdwatching on human and avian communitiesEcotourism can be a vehicle for community-based conservation if it is conducted with an emphasis on the well-being of local ecosystems and human communities. Birdwatchers form the largest group of ecotourists, and are, on average, well-educated, wealthy and committed. This makes them ideal ecotouris...2002-01-01
8 Regehr, JohnInferring scheduling behavior with hourglassAlthough computer programs explicitly represent data values, time values are usually implicit. This makes it difficult to analyze and debug real-time programs whose correctness depends partially on the time at which results are computed. This paper shows how to use Hourglass, an instrumented, synthe...2002-01-01
9 Zhdanov, Michael S.Localized S-inversion of time-domain electromagnetic dataInterpretation of time-domain electromagnetic (TDEM) data over inhomogeneous geological structures is a challenging problem of geophysical exploration. The most widely used approach of interpreting TDEM data is based on the smooth 1-D layered resistivity inversion. We have developed an effective t...2002-01-01
10 Harrison, Reid R.Low-power, low-noise CMOS amplifier for neural recording applicationsThere is a need among scientists and clinicians for lownoise, low-power biosignal amplifiers capable of amplifying signals in the mHz to kHz range while rejecting large dc offsets generated at the electrode-tissue interface. The advent of fully-implantable multielectrode arrays has created the nee...2002-01-01
11 Regehr, JohnScheduling Tasks with mixed preemption relations for robustness to timing faultsThis paper introduces and shows how to schedule two novel scheduling abstractions that overcome limitations of existing work on preemption threshold scheduling. The abstractions are task clusters, groups of tasks that are mutually non-preemptible by design, and task barriers, which partition the tas...2002-01-01
12 Simpson, Jamesina J.Two-dimensional FDTD model of antipodal ELF propagation and schumann resonance of the earthThis letter reports the initial application of the finitedifference time-domain (FDTD) method to model extremely lowfrequency (ELF) propagation around the entire Earth. Periodic boundary conditions are used in conjunction with a variable-cell two-dimensional TM FDTD grid, which wraps around the comp...2002-01-01
13 Zhdanov, MichaelTwo-dimensional magnetotelluric inversion of blocky geoelectrical structuresThis paper demonstrates that there are alternative approaches to the magnetotelluric (MT) inverse problem solution based on different types of geoelectrical models. The traditional approach uses smooth models to describe the conductivity distribution in underground formations. In this paper, we pres...2002-01-01
14 Parker, Bradley J.The upper Tigris archaeological research project: a final report from the 1999 field seasonDuring the summer of 1999 members of the Upper Tigris Archaeological Research Project (UTARP) conducted archaeological excavations and surveys at two sites in the upper Tigris river region of southeastern Turkey. This article presents the results of that research. At the site of Boztepe excavations ...2002-01-01
15 Harrison, Reid R.Wide-linear-range subthreshold CMOS transconductor employing the back-gate effectWe present a CMOS circuit that utilizes the back-gate effect to extend the linear range of a subthreshold MOS transconductor. Previous designs of wide-linear-range transconductors using bipolar transistors employed multiple differential pairs with input offset voltages used to shift the individ...2002-01-01
16 Parker, Bradley J.Yukarı Dicle Arkeolojik Araştırma Projesi (UTARP): 2002 Yılı Kenan Tepe Kazilarina Genal BakışYukan Dicle Arkeolojik Ara§tirma Projesi cali§anlari 2002 yazi boyunca Tiirkiye'nin giineydogusundaki Ihsu Baraji sahasinda bulunan Kenan Tepe yerle§iminde iictincii sezon arkeolojik kazilan yiirutmu§tiir'. Onceki ciltteki raporumuz (Parker et al. 2004) Kenan Tepe'deki ilk iki sezon ara§tirmala...2002-01-01
1 - 25 of 16