Starting with a shape-preserving C 1 quadratic spline, we show how knots can be removed to produce a new spline which is within a speciied tolerance of the original one, and which has the same shape properties. We give speciic algorithms and some numerical examples, and also show how the method can be used to compute approximate best free-knot splines. Finally, we discuss how to handle noisy da...

Ethionine reduced both the growth rate and the final growth level of Serratia marcescens Sr41. Growth inhibition was completely reversed by methionine. Strain D-315, defective in homoserine dehydrogenase I, was more sensitive to ethionine-mediated growth inhibition than was the wild-type strain. Ethionine-resistant mutants were isolated from cultures of strain D-316, which was derived from stra...

The use of gmded ultrasonic waves to rap1dly mterrogate !arge structures is a topic that 1s currently receiving considerable attention. The purpose of this paper, and the companion paper by Alers [I], is to briefly review some past expenence that may not be readily available to current researchers since many of the results were not presented in archival publications. The work described in this ...

I was trained with femoral catheterization techniques and found catheterization from the right radial artery to be a frustrating experience. Specialized catheters were of no avail in reducing excessive fluoroscopic time or providing the guide catheter support that I was accustomed to from the femoral approach. I nearly abandoned the radial technique. I then chose to cannulate the left radial ar...

Recently external memory graph problems have received considerable attention because massive graphs arise naturally in many applications involving massive data sets. Even though a large number of I/O-efficient graph algorithms have been developed, a number of fundamental problems still remain open. The results in this paper fall in two main classes. First we develop an improved algorithm for th...

Address correspondence to: Dr. C.A. Martínez Palacios. Universidad Michoacana de San Nicolás de Hidalgo. Av. San Juanito Itzícuaro s/n, Col. San Juanito Itzícuaro, Morelia, Michoacán, MEXICO. E-mail: [email protected] / [email protected] Received on February 3, 2005. Accepted on September 15, 2005. The family Atherinopsidae consists of 150 to 160 species, and most of them live in marine and b...