Data transmission from sensor nodes to a base station or a sink node often incurs significant energy consumption, which critically affects network lifetime. We generalize and solve the problem of deploying multiple base stations to maximize network lifetime in terms of two different metrics under one-hop and multihop communication models. In the one-hop communication model, the sensors far away...

For hands-free communication system, this paper describes a noise reduction method using a 2-channel microphone. Recently, the Complex Spectrum Circle Centroid (CSCC) method has been proposed. This method utilizes geometric information and estimates the spectrum of the target signal. The method is advantageous in that no adjustment of the array-processing parameters to the environment is necess...

In this paper, I explore the exponential Rosenbrock-type method of order two. It is an explicit method that solves stiff ODEs. The method linearizes the equation with each step, then uses a matrix exponential to solve the linearized equation exactly. Previous research has identified stability bounds and convergence results. In this paper, I explore the stiffness capabilities of this second orde...

This paper proposes a connectivity-based method for circle $tting. The use of pixel connectivity e3ectively avoids false circle detection, improves the robustness against noise and signi$cantly reduces the computational load. The desired circular models are extracted by searching for meaningful circular arcs. The algorithm does not require a good initial guess, and is e3ective for extracting an...

In this paper we propose a novel method, called Metrical Circle Map, for exploring the cyclic aspects of musical time. To this end, we give a concise formalization and introduce the notion of Metrical Markov chains as n-th order transition probabilities of segments on the metrical circle. Several examples from a wide range of music, including monophonic folk and pop songs, as well as polyphonic...

A new method is presented for computing the minimum distance between a point and a NURBS curve. It utilizes a circular clipping technique to eliminate the curve parts outside a circle with the test point as its center point. The radius of the elimination circle becomes smaller and smaller during the subdivision process. A simple condition for terminating the subdivision process is provided, whi...

class Drawable { abstract void draw(); } abstract class Shape extends Drawable {} class Circle extends Shape { void draw() { printf("Circle"); } } class Triangle extends Shape { void draw() { printf("Triangle"); } } class Rectangle extends Shape { void draw() { printf("Rectangle"); } } class Square extends Rectangle {} and it is associated with an instantiated class (i.e., it is the method that...

We introduce the circle product, a method to construct simple graphs starting from known ones. The circle product can be applied in many different situations and when applied to regular graphs and to their decompositions, a new regular graph is obtained together with a new decomposition. In this paper we show how it can be used to construct infinitely many new solutions to the Oberwolfach probl...

Equations are developed for the potential due to a source and sink, or dipole, inside a circle of finite resistivity surrounded by a two-dimensional infinite medium of different resistivity. When the resistivity of the external medium is allowed to increase to infinity, the resulting equations give identical results to those presented by Bayley for the dipole potential in an insulating circle. ...