Now showing items 1-10 of 26
On the statistics of random pulse processes
(Elsevier, 1971-05)
Statistics are obtained for pulse trains in which the pulse shapes as well as the time base are random. The general expression derived for the mean and spectral density of the pulse train require neither independence of ...
The nature of middle school learners' science content understandings with the use of on-line resources
(Wiley Subscription Services, Inc., A Wiley Company, 2003-03)
Early research on using the World Wide Web indicated that middle school students did not explore much and used Web tools naively. In response to these challenges, an on-line research engine, Artemis, was designed to provide ...
Multichannel semiconductor-based electrodes for in vivo electrochemical and electrophysiological studies in rat CNS
(Elsevier, 1990-12-11)
Five-channel silicon-based microprobes were sputter-coated with carbon, coated with Nafion, and used for both in vivo electrochemical and single-unit electrophysiological recordings. High-speed electrochemical studies were ...
Promoting understanding of chemical representations: Students' use of a visualization tool in the classroom
(John Wiley & Sons, Inc., 2001-09)
Many students have difficulty learning symbolic and molecular representations of chemistry. This study investigated how students developed an understanding of chemical representations with the aid of a computer-based ...
A logic for constant-depth circuits
(Elsevier, 1984-04)
Consider a family of boolean circuitsC1,C2,...,Cn,..., constructed by some uniform, effective procedure operating on inputn. Such a procedure provides a concise representation of a family of parallel algorithms for computing ...
On the relationships between Scott domains, synchronization trees, and metric spaces
(Elsevier, 1985)
We use Scott's idea of information systems to provide a complete partial order semantics for concurrency involving Milner's synchronization tree model. Several connections are investigated between different models; our ...
The decentralized wald problem
(Elsevier, 1987-04)
Two detectors making independent observations must decide which one of two hypotheses is true. The decisions are coupled through a common cost function. It is shown that the detectors' optimal decisions are characterized ...
The spectral analysis of impulse processes
(Elsevier, 1968-03)
An expression for the spectral density of the impulse process s(t) = {if236-1} is derived under the assumption that [alpha]n}} is a stationary process, and that n}} is a stationary point process independent of [alpha]n}}. ...
Mapping freeze/thaw boundaries with SMMR data
(Elsevier, 1990-08)
Nimbus 7 SMMR data are used to map daily freeze/thaw patterns in the upper Midwest for the fall of 1984. The combination of a low 37 GHz radiobrightness and a negative 10.7, 18 and 37 GHz spectral gradient, [part]Tb/[part]f, ...
The computational complexity of asymptotic problems I: Partial orders
(Elsevier, 1988-08)
The class of partial orders is shown to have 0-1 laws for first-order logic and for inductive fixed-point logic, a logic which properly contains first-order logic. This means that for every sentence in one of these logics ...