High-frequency, narrowband acoustic signals may contain more information on fish size and orientation than previously thought. Our observations of dual frequency identification sonar (DIDSON) images of fish orientation paired with split-beam echo envelopes helped clarify why metrics such as echo duration have performed better than target strength measurements when predicting salmon lengths at s...

data/water/regionalet.asp) are a) the ET rates of the winter months (December, January, February) are included in the current annual maps; b) the method became largely automated and thus its application made simpler. The modeling period could have been extended to include 2010, however, the project (GCIP-SRB, http://metosrv2.umd.edu/~srb/gcip/cgibin/historic.cgi) that provided the monthly incom...

Management has become a key concern for the success of multicast deployment in the Internet. One of the most important management tasks for multicast is to verify the availability of the service to its users. This task is referred to as discovering or testing reachability. In this paper, we present a new mechanism, SSM-Ping, for discovering multicast reachability between (remote) end systems in...

Recently introduced combined PET/MR scanners need to handle the specific problem that a limited MR field of view sometimes truncates arm or body contours, which prevents an accurate calculation of PET attenuation correction maps. Such maps of attenuation coefficients over body structures are required for a quantitatively correct PET image reconstruction. This paper addresses this problem by pre...

Improving system performance in terms of data rate, mobility and cost is the scope of Long Term Evolution (LTE) system. In LTE networks the handover (HO) decision is performed by the evolved base station (eNB). The ping-pong movement in LTE is one of the most crucial problems which reduce the quality of the connection and degrade the performance of the handover. In this paper, the impact of pin...

We consider the problem of computing stable/unstable manifolds attached to periodic orbits of maps, and develop quasi-numerical methods for polynomial approximation of the manifolds to any desired order. The methods avoid function compositions by exploiting an idea inspired by multiple shooting schemes for periodic orbits. We consider a system of conjugacy equations which characterize chart map...

This paper addresses model reduction and extends balanced truncation to the class of switched affine systems with endogenous switching. The switched affine system is rewritten as a switched linear one with state resets that account for the affine terms. Balanced truncation can then be applied to each mode dynamics, independently. As a result, different reduced state vectors are associated with ...

Location areas is a popular location management scheme in cellular networks. In the location areas scheme, a mobile terminal updates its location whenever it moves into a cell that belongs to a new location area. However, no matter how the location areas are designed, the ping-pong location update effect exists when a mobile terminal moves back and forth between two location areas. The paper de...