Recent progress in the development of a physics-based numerical propagation model for the virtual transmission of acoustic communication signals in shallow water is presented. The ultimate objective is to provide for the prediction of the output of the quadrature detector (QD, an analog of the discrete Fourier transform) in a time-variant, doubly dispersive, shallow-water channel. Current model...

In MANET, mobile nodes communicate with each other using the wireless channel where transmission takes place with significant interference. The wireless medium used in MANET is a shared resource used by all the nodes available in MANET. Packet reserving is one important resource management scheme which controls the allocation of bandwidth among multiple flows through node cooperation in MANET. ...

This paper aims to engender an awareness of the psychological, technological, and operational obstacles which confront actuaries throughout the reserving process, preventing them from developing appropriate best estimates. Although reserving issues are a regular subject in actuarial literature, nowhere is the term “best estimate” defined. In response to this absence, the authors consider criter...

Recently, more and more attention is paid to reversible data hiding (RDH) in encrypted images, since it maintains the excellent property that the original cover can be losslessly recovered after embedded data is extracted while protecting the image content’s confidentiality. All previous methods embed data by reversibly vacating room from the encrypted images, which may be subject to some error...