This thesis evaluates new, large power generating plants of
the various types expected to be practicable in the time span of
the next 50 years. By using thermodynamic principles, the plants
are evaluated on the basis of conservation of energy; the basic
assumption is that the best policy is the...
The capacitance-voltage (C-V) technique is proposed as a method for characterization of the electrical properties of alternating-current thin-film electroluminescent (ACTFEL) display devices. Analysis of the C-V and aging characteristics of ZnS:Mn ACTFEL devices indicates that the C-V technique is complementary to the charge-voltage technique in the extraction of device physics...
Over 20 global ocean tide models have been developed since 1994, primarily as a
consequence of analysis of the precise altimetric measurements from TOPEX/POSEIDON and as a result of parallel developments numerical tidal modeling and data assimilation. This paper
provides an accuracy assessment of 10 such tide models and discusses...
Calcium carbonate percentages at five Ceara Rise sites were estimated at 1- to 2-k.y. intervals over the past 5 m.y., using
reflectance spectroscopy and magnetic susceptibility proxies. From these estimates and detailed correlations between sites, gradients
of calcite and terrigenous sediment accumulation rates in a depth transect of sites reveal...
The High Performance Research Reactor Fuel Development (HPPRFD) program is responsible for developing low enriched uranium (LEU) fuel substitutes for high performance reactors fueled with highly enriched uranium (HEU) that have not yet been converted to LEU. The uranium-molybdenum (U-Mo) fuel system was selected for this effort. In this study,...
Assistive mobile manipulators have the potential
to one day serve as surrogates and helpers for people with
disabilities, giving them the freedom to perform tasks such as
scratching an itch, picking up a cup, or socializing with their
families. This article introduces a collaborative project with the
goal of putting...
A suite of eight rocks analyzed by the Curiosity Rover while it was stopped at the Rocknest sand
ripple shows the greatest chemical divergence of any potentially sedimentary rocks analyzed in the early
part of the mission. Relative to average Martian soil and to the stratigraphically lower units encountered as...
The accuracy of state-of-the-art global barotropic tide models is assessed using bottom
pressure data, coastal tide gauges, satellite altimetry, various geodetic data on Antarctic ice shelves, and
independent tracked satellite orbit perturbations. Tide models under review include empirical, purely
hydrodynamic (“forward”), and assimilative dynamical, i.e., constrained by observations. Ten dominant...
Historical ecology is becoming an important focus in conservation biology and offers a promising tool to help guide ecosystem management.
Here, we integrate data from multiple disciplines to illuminate the past, present, and future of biodiversity on California’s Channel Islands, an
archipelago that has undergone a wide range of land-use...