In this paper, a class of Hessenberg matrices is presented for adoption as test matrices. The Moore-Penrose inverse and the Drazin inverse for each member of this class are determined explicitly.

RETURNING now to the United States for a consideration of research developments there during the late fifties and early sixties. In reviewing the major publications of the time, one can see that the whole approach to the question of accident proneness was still one of openminded inquiry. Despite a certain amount of despondency over the lack of statistical evidence to support the concept (especi...

BACKGROUND There are limited data to inform the choice between early treatment with continuous positive airway pressure (CPAP) and early surfactant treatment as the initial support for extremely-low-birth-weight infants. METHODS We performed a randomized, multicenter trial, with a 2-by-2 factorial design, involving infants who were born between 24 weeks 0 days and 27 weeks 6 days of gestation...

Mohamad Khairuzzaman Mohamad Zamani, Ismail Musirin, Mohamad Sabri Omar, Saiful Izwan Suliman, Nor Azura Md. Ghani, Nur Azwan Mohamed Kamari Faculty of Electrical Engineering, Universiti Teknologi MARA, 40000 Shah Alam, Selangor, Malaysia Faculty of Computer & Mathematical Sciences, Universiti Teknologi MARA, 40000 Shah Alam, Selangor, Malaysia Department of Electrical, Electronic & Systems Eng...

In this paper we prove that the simplest band representations of unitary operators on a Hilbert space are five-diagonal. Orthogonal polynomials on the unit circle play an essential role in the development of this result, and also provide a parametrization of such five-diagonal representations which shows specially simple and interesting decomposition and factorization properties. As an applicat...

0

Fig. 1. Past Editor-in-Chief Ludwig Karl von Segesser. The European Journal of Cardio-thoracic Surgery (EJCTS) was established in July 1987 as the official scientific publication of the European Association for Cardio-Thoracic Surgery. The first two Editors-in-Chief of the Journal were Professor Hans Borst and Professor Marko Turina. They were very successful in establishing and developing the ...

Gustav Jacob Born was an experimental embryologist whose original work with amphibians [5] served as the platform for his wax-plate method [6] of embryo modeling, heteroblastic (different tissues) and xenoplastic (similar species) transplantation methods, environmental influences on sex ratio studies, and proposed function of the corpus luteum [7]. He was born 22 April 1851 in Kempen, Prussia, ...

In his book, The Organization of Behavior, Donald Olding Hebb introduced the concepts of synaptic plasticity and cell assemblies to provide a theory of the neurophysiological basis of behaviour. Hebb's ideas, as presented in this book and other writings, influenced all areas of psychology and neuroscience. Hebb was born in Chester, Nova Scotia, Canada and attended Dalhousie University (BA, 1925...

IT'WAS 1938, 20 years ago, when, in conversation with Professor R. A. Brink of the Department of Genetics at the University of Wisconsin, that I first heard of the work beingfr done in the Department of Agriculture to identify the substance in spoiled sweet clover accountable for hemorrhagic disease in cattle. This had been initially undertaken in 1934 at the Wisconsin Agricultural Experiment S...