In this paper, the use of wireless sensor networks for networked control loop is analyzed. As the non beacon-enabled mode of IEEE 802.15.4/ZigBee does not ensure the stability for the control loop since non mechanism can prevent the perturbation coming from other applications sharing the same network, the quality of control has to be guaranteed for the control loop. Several possible solutions a...

In this paper several rate R = 2/5 convolutional encoding matrices with four states are used to illustrate how unequal error protection can be achieved for the different positions in the code sequences as well as in the information sequences. Free outputand input-distances and active burst outputand input-distances are computed. Typically a single code cannot combine a large free outputor input...

We present an admission control framework and loss management techniques in support of a guaranteed statistical service. The service is characterized by (i) the loss rate of application data units (ADUs) bounded below a specified value, and (ii) ADU losses distributed evenly among flows subscribing to the service and uniformly over the duration of each flow. Specifically, a flow is modeled as a...

It is well known that during the process of transmission errors occur predominantly in the form of a burst. However, it does not generally happen that all the digits inside any burst length get corrupted. Also when burst length is large then the actual number of errors inside the burst length is also not very less. Keeping this in view, we study codes which detect/correct moderate-density burst...

First results using the new Sentinel-1 SAR look very promising but the special interferometric wideswath data acquired in the TOPS mode makes InSAR processing challenging. The steep azimuth spectra ramp in each burst results in very stringent co-registration requirements. Combining the data of the individual bursts and sub-swaths into consistent mosaics requires careful “book-keeping” in the ha...

The hierarchy of models applicable to transient free surface problems of ground water ̄ow to drains is discussed. The model choice is related to drain type and dewatering stage. Flow pattern is illustrated to vary with decrease of the water table. Simulation of drains and corresponding boundary conditions are discussed. # 2000 Elsevier Science B.V. All rights reserved.

The purpose of this paper consists in establishing the model for the supply-demand interaction in the age of electronic commerce. First of all, the study uses the individual objectives of both parties as the foundation of the supply-demand interaction. Subsequently, it divides the interaction, in the age of electronic commerce, into the following two classifications: (i) Market transactions, wi...