an investigation on the thermal performance of the soil as geothermal heat energy storage medium has been conducted. the thermal characteristics of the soil storage and the heat transfer from a heat exchanger in the soil, surrounding and bottom surface will be discussed. this investigation forms a contribution to a project to realize such storage to be charged from a solar heating system. this ...

Several query languages have been proposed for managing data streams in modern monitoring applications. Continuous queries expressed in these languages usually employ windowing constructs in order to extract finite portions of the potentially unbounded stream. Explicitly or not, window specifications rely on ordering. Usually, timestamps are attached to all tuples flowing into the system as a m...

O nce you get to Swanton Pacific Ranch in the coastal mountains north of Santa Cruz, it's pretty obvious the 3,200-acre spread offers many things you just won't find at Cal Poly: trees, for one thing. A whole forest full of them 2,100 acres to be exact. They cover steep mountain slopes and march in tall columns down to grassy meadows. A river runs through it: Scott Creek and its tributaries. "T...

The rough, hairy surfaces of many insects and spiders serve to render them water-repellent; consequently, when submerged, many are able to survive by virtue of a thin air layer trapped along their exteriors. The diffusion of dissolved oxygen from the ambient water may allow this layer to function as a respiratory bubble or ‘plastron’, and so enable certain species to remain underwater indefinit...

Abs t r ac t . The Multimedia Multicast Channel is a dissemination-oriented communication abstraction providing a service analogous to that of a cable television broadcast channel. A source transmits multimedia information such as video and audio streams onto a channel, and a varying number of receivers "tune in" to the channel to receive a selected set of the streams. To support heterogeneity~...

Forest operations can lead to increased runoff and soil loss on roads skid trails. Best management practices (BMPs) aim minimize erosion water quality problems, but the efficacies of various BMP options such as bars are not well documented. The this study was evaluate effects different densities diversion structures (water bars) volume trail gradients two soils with textures in Shenrood forest,...

This paper provides a review of the different Cross Layer Design and protocol tuning approaches that may be used to meet a growing need to support inelastic soft real-time streams in MANETs. These streams are characterised by critical timing and throughput requirements and low packet loss tolerance levels. Many Cross Layer approaches exist either for provision of QoS to soft real-time streams i...

Ice streams are bands of fast-flowing ice in sheets. We investigate their formation as an example spontaneous pattern formation, based on positive feedbacks between dissipation and basal sliding. Our focus is temperature-dependent subtemperate sliding, where faster sliding leads to enhanced hence warmer temperatures, weak- ening the bed further, a similar feedback driven by melt water productio...