Wireless sensor network is the area where many researchers are focusing. The emerging technology of WSN is expected to provide a broad range of applications, such as battlefield surveillance, environmental monitoring and smart space and so on. Coverage is the important quality of service which is provided by the wireless sensor network. The coverage hole problem is a fundamental issue in WSN. T...

In this thesis, we introduce hole-mask colloidal lithography and nanosphere lithography techniques for low-cost nanofabrication of large-area (about 1 cm) plasmonic nanostructures with different complex shapes. For the first one, we use thin film PMMA-gold hole-masks, which are first prepared with polystyrene colloids, combined with following tilted-angle-rotation evaporation to fabricate large...

By using operant conditioning techniques one group of 8 rats was trained to reach through a hole in the wall of an operant chamber, and to exert downward responses on a force-sensing circular disk. Eight other rats learned to reach through the hole and grasp and pull toward them a wire bail attached to a force transducer. Both behaviors were maintained on a fixed ratio 20 schedule of water rein...

In this paper, we consider a cognitive radio network that consists of one cognitive base station (CBS) and multiple cognitive users (CUs) in the presence of an eavesdropper. In the cognitive radio network, CBS first detects whether there is spectrum hole through spectrum sensing and then communicates with CUs over the detected spectrum hole. Due to the broadcast nature of wireless transmission,...

using piezoelectric patches the stress concentration around a hole on a plate under tension is reduced and controlled. to attain the reduction in stress two placements for piezoelectric patches is investigated. the first location is top/bottom of the hole with compression induced strain and the second is left/right of the hole with tension induced strains to control the stress flow. the result ...

This paper presents an approach to estimating the contact state between a robot and its environment during task execution. Contact states are modeled by constraint equations parameterized by time-dependent sensor data and timeindependent object properties. At each sampling time, multiple model estimation is used to assess the most likely contact state. The assessment is performed by a Hidden Ma...

In recent work [1], we introduced a new, linear-programming based method, for detecting underground features based on gravity measurements. The current paper takes this method one important step further, in that it makes it work under realistic conditions, where most of the physical characteristics of the environment are not known. In particular, the ADCS algorithm we introduce works when the f...