1. A continuously recording glass electrode apparatus has been described for measuring carbon dioxide concentration changes in solution. The limits of applicability of the apparatus have been analyzed. 2. The glass electrode apparatus has been used for the measurement of transient rates of photosynthesis by algal suspensions. 3. The decline of the photosynthetic rate in high light at carbon dio...

Data streams flowing from the physical environment are as unpredictable as the environment itself. Radars go down, long haul networks drop packets, and readings are corrupted on the wire. Yet the data driven scientific models and data mining algorithms do not necessarily account for the inaccuracies when assimilating the data. Low overhead provenance collection partially solves this problem. We...

BACKGROUND: Water quality improvement is potentially an important function of wetlands. Mechanisms that occur in wetlands, such as sedimentation, filtration, adsorption, precipitation, decomposition, and uptake and metabolism, can act to reduce concentrations of problematic water quality constituents flowing into wetlands. Similarly, streams, ponds, and lakes can act as natural treatment system...

The problem of scheduling multiple streams of real-time customers is addressed in this paper. The paper rst introduces the notion of (m; k)-rm deadlines to better characterize the timing constraints of real-time streams. More speciically, a stream is said to have (m; k)-rm deadlines if at least m out of any k consecutive customers must meet their deadlines. Note that, the notion of (m; k)-rm de...

The problem of scheduling multiple streams of real-time customers is addressed in this paper. The paper rst introduces the notion of (m; k)-rm deadlines to better characterize the timing constraints of real-time streams. More speciically, a stream is said to have (m; k)-rm deadlines if at least m out of any k consecutive customers must meet their deadlines. A stream with (m; k)-rm deadlines exp...

The powder-blasting method is used to fabricate structures with a three-dimensional topography in glass using elastomeric masks. The relation between the mask opening width and the erosion depth is exploited to fabricate microstructures with varying depth in a single micropatterning step. As an application, planar three-dimensional micro-mixers were fabricated, which consist of a repeating conv...

The purpose of this article was to assess the overall health behaviors of African American emerging adults who live in a Midwestern city. Two hundred participants, ages 18-25, completed a 129-item survey. Results indicate that African American emerging adults are engaged in relatively healthy behaviors (i.e., physical activity, low substance use). The results also showed that within the emergin...

This paper describes an algorithm, called Dynamic Window-Constrained Scheduling (DWCS), designed to meet the service constraints on packets from multiple, network-bound media streams with diierent performance objectives. Using only two attributes, a deadline and a loss-tolerance per packet stream, DWCS: (1) can limit the number of late packets over nite numbers of consecutive packets in loss-to...

In real-time Internet based teleoperation systems, the Internet is the communication medium through which the operator sends control commands to the robot and receives feedback. Teleoperation systems support robotic control commands, video, audio, haptic feedback, and other sensory information, which are called supermedia. Traditional transport services of the Internet may not be able to meet t...