Data gathering is a key operator for applications in wireless sensor networks; yet it is also a challenging problem in mobile sensor networks when considering that all nodes are mobile and the communications among them are opportunistic. This paper proposes an efficient data gathering scheme called ADG that adopts speedy mobile elements as the mobile data collector and takes advantage of the mo...

[no abstract available]

Service routing across multiple network domains often requires redirection of service requests. Service request redirection can be achieved with multiple single hop redirection as in Session Initiation Protocol (SIP) or as a single redirection of multiple hops as in Service Network Graph (SNG). For efficiency and manageability, it is desirable to hold all the redirection information and knowled...

This paper describes a llew approach to the design of multi-element resonant reflectors. These mirrors provide an effective meansof controlling the spectral spread of high-gain laser oscillators, but thecomplexityof the reflectivity as a function of wavelength R(h) hasmade the design of these systems rather difficult. However, we show ManuscriptreceivedApril25, 1...

This paper presents an approach for combined mass and energy integration in process synthesis and illustrates it at the thermochemical production of crude synthetic natural gas (SNG) from lignocellulosic biomass and its separation in a membrane cascade. Based on a general process superstructure, the design problem is decomposed into non-linear unit models whose energy and mass balances are used...

The most costly aspect of gathering information over the Internet is that of transferring data over the network to answer the user’s query. We make two contributions in this paper that alleviate this problem. First, we present an algorithm for reducing the number of information sources in an information gathering (IG) plan by reasoning with localized closed world (LCW) statements. In contrast t...

Several Schur complement-based preconditioners have been proposed for solving (generalized) saddlepoint problems. We consider probing-based methods for approximating those Schur complements in the preconditioners of the type proposed by [Murphy, Golub and Wathen ’00], [de Sturler and Liesen ’03] and [Siefert and de Sturler ’04]. This approach can be applied in similar preconditioners as well. W...

The international grain trade is a major pathway for the introduction of alien plants because commodities can be contaminated with various weed seeds. To evaluate how seeds derived from imported affect local flora in trading ports, we conducted floristic survey at each 10 landing ports and non-grain throughout Japan to compare between these two types ports. We also surveyed seed contamination w...