ÐA framework for the development of di€erent global illumination algorithms is presented: the SIR (Sistema de Iluminacio n Realista) architecture. It consists of a set of object-oriented components, which constitute a kernel, intended to be extended by software developers for the speci®c needs of photorealistic or physically based rendering algorithms. # 1998 Elsevier Science Ltd. All rights r...

Based on a Dissertation read before the Royal Medical Society on Friday, 21st October 1960 Picture, if you can. a dark grim valley of smoke and chimneys, outlined by a ring of light appearing over the hills. In the streets a clatter of horses' hooves and wooden clogs. In a dingy room the oft repeated scene of a girl in labour surrounded by old women in shawls. The ubiquitous, anxious husband is...

trumpet of praise, and his enemies tried to give him a parting kick. We have nothing unkind to say of Sir George. True, lie once insulted the Calcutta doctors grievously by insinuating that they made false returns of their earnings. He was taken to book promptly and sharply on this account at the time. He was able to show that he was misled by statistics and made a frank and generous amende. Th...

S ir Richard Doll falleció en Oxford a la edad de 92 años el 24 de Julio de 2005 a causa de un fallo cardiaco agudo. Había pasado por varias jubilaciones: de la presidencia de Regius Professor of Medicine en 1979; de Green College, el cual fundó y donde cinco años fue director; y de la Universidad de Oxford en 1983. Tras 22 años de su última jubilación “oficial”, aún se complacía en escribir ar...

Sir Peter Medawar experimentally demonstrated immunological tolerance through his tissue transplantation experiment in the early and mid-1950s. He made a central contribution to modern biomedicine by showing that genetically distinct cells introduced into a body during its foetal phase could not only be permanently tolerated but also make the host accept any subsequent skin grafts from the orig...

Academic research is increasingly centering on interdisciplinary work. Strong (SIR), involving researchers from very different fields, such as scientists and humanists, often encouraged, if not required, by funding agencies. I argue that two intellectual virtues, open-mindedness humility, are crucial for overcoming obstacles to SIR achieving success. In part I, provide a primer virtue the virtu...