The fact that the differential diagnosis of inflammatory bowel disease includes intestinal infections has been a source of much interest and clinical concern for many years. Since the recognition of ulcerative colitis and Crohn's disease as clinical entities, numerous attempts have been made to identify a specific organism resulting in the clinical and pathologic picture of inflammatory bowel disease. The isolation, in 1984, of M.paratuberculosis initiated the current interest in and controversy about a mycobacterial etiology in Crohn's disease. The hypothesis that Crohn's disease is Johne's...

The essays included in this volume are a mixture of old and new. Three of them make their first appearance in print on this occa- sion (Nos III, IV, and V). The remaining four are based upon materials previously published in learned journals or anthologies. (However, these previously published papers have been revised and, generally, expanded for inclusion here.) Detailed acknowl- edgement of prior publications is made in the notes to the relevant articles. I am grateful to the editors of these several publications for their kind permission to use this material. I am grateful to an anonymous...

It has become a tradition in the Union to publish the Invited Discourses and the Proceedings of the Joint Discussions held at a Gene- ral Assembly in a separate volume entitled HIGHLIGHTS OF ASTRONOMY. This is the fourth volume of its kind and it contains some of the scientific highlights of the Grenoble General Assembly. In order to reduce its size it was decided to publish its content in two separate parts. The part (I) contains the full texts of the In- vited Discourses given by Prof. J.-C. Pecker and by Dr. C. Sagan, and an abstract of Dr. P. Morrison's paper, thus complying with his wish...

Yehoshua Bar-Hillel (1915-1975) was one of the leading intellectuals of Israel and of the world. His work ranged over mathematics, applied logic, communication theory, analytic philosophy, philosophy of science, and linguistics. Creative, patient, attentive, and critical, Bar-Hillel was a superb philosopher. In addition, how humane he was may be learned from the memorial tributes to him which initiate this volume. Bar-Hillel was born in Vienna, and came to Israel, then Palestine, in 1933. He took his M. A. (1938) and Ph. D. (1949) at the Hebrew University of Jerusalem, where his subsequent...

This book studies the problem of acquaintance against the background of a more general theory of intentionality. Much of the relevant background is laid out in the book I wrote with Ronald McIntyre, Husserl and Intentionality (1982). However, since this book is not focussed on HusserI, I shall not assume the reader's familiarity with the prior book or with HusserI's philosophy. (I have sometimes referred to this book-in progress as Acquaintance; I've rounded out the title a bit. ) of The initial inspiration for this work, in the 1970's, was a confluence ideas from the logic of perception and...

In the last decades, a lot of effort has been directed towards manipulation of turbulent boundary layers by passive devices such as external manipulators (thin flat plates or aerofoil section devices embedded in the outer layer) and/or internal manipulators (small streamwise grooves acting directly on the inner region) for the purpose of reducing viscous drag. The former are commonly referred to as LEI3U s or BLADEs and the laHer riblets or grooves. Though the details of the mechanisms are not firmly understood, world-wide experimenta. data are available and consistent enough in order to...

The essays in this collection have been written for Gerd Buchdahl, by colleagues, students and friends, and are self-standing pieces of original research which have as their main concern the metaphysics and philosophy of science of the seventeenth and eighteenth centuries. They focus on issues about the development of philosophical and scientific thought which are raised by or in the work of such as Bernoulli, Descartes, Galileo, Kant, Leibniz, Maclaurin, Priestly, Schelling, Vico. Apart from the initial bio-bibliographical piece and those by Robert Butts and Michael Power, they do not...