Forty Years of Quantitative Diffraction Analysis

1976 ◽  
Vol 20 ◽  
pp. 1-13 ◽  
Author(s):  
Leroy E. Alexander

In this paper an attempt is made to review in rather broad perspective the origins and history of quantitative methods in diffraction analysis, at the same time leaving an in-depth examination of the present state of the art to other better qualified contributors to this conference. Space limitations preclude mention of many significant contributions, for which I am very sorry. It will be possible to review only a number of pivotal historical events, while also taking note of certain other researches that seem representative of historical and present-day trends.The birth of quantitatively meaningful analysis in the mid-1930s depended upon a realisation of, and allowance for, the alteration of the diffracted intensities resulting from absorption of x-rays by the specimen. Furthermore, advances in the art achieved during the past forty years have been closely related to improvements in the treatment of the absorption factor.

This volume vividly demonstrates the importance and increasing breadth of quantitative methods in the earth sciences. With contributions from an international cast of leading practitioners, chapters cover a wide range of state-of-the-art methods and applications, including computer modeling and mapping techniques. Many chapters also contain reviews and extensive bibliographies which serve to make this an invaluable introduction to the entire field. In addition to its detailed presentations, the book includes chapters on the history of geomathematics and on R.G.V. Eigen, the "father" of mathematical geology. Written to commemorate the 25th anniversary of the International Association for Mathematical Geology, the book will be sought after by both practitioners and researchers in all branches of geology.


1985 ◽  
Vol 19 (1) ◽  
pp. 9-33 ◽  
Author(s):  
J. L. Berggren

In Recent Years, many discoveries in the history of Islamic mathematics have not been reported outside the specialist literature, even though they raise issues of interest to a larger audience. Thus, our aim in writing this survey is to provide to scholars of Islamic culture an account of the major themes and discoveries of the last decade of research on the history of mathematics in the Islamic world. However, the subject of mathematics comprised much more than what a modern mathematician might think of as belonging to mathematics, so our survey is an overview of what may best be called the “mathematical sciences” in Islam; that is, in addition to such topics as arithmetic, algebra, and geometry we will also be interested in mechanics, optics, and mathematical instruments.


2012 ◽  
Author(s):  
Eileen Ka-May Cheng

“What is historiography?” asked the American historian Carl Becker in 1938. Professional historians continue to argue over the meaning of the term. This book challenges the view of historiography as an esoteric subject by presenting an accessible and concise overview of the history of historical writing from the Renaissance to the present. Historiography plays an integral role in aiding undergraduate students to better understand the nature and purpose of historical analysis more generally by examining the many conflicting ways that historians have defined and approached history. By demonstrating how these historians have differed in both their interpretations of specific historical events and their definitions of history itself, this book conveys to students the interpretive character of history as a discipline and the way that the historian’s context and subjective perspective influence his or her understanding of the past.


1875 ◽  
Vol 8 ◽  
pp. 31-31
Author(s):  
Blackie

The Author showed by a historical review of the fortunes of Greece, through the Middle Ages, and under the successive influences of Turkish conquest and Turkish oppression, how the Greek language had escaped corruption to the degree that would have caused the birth of a new language in the way that Italian and the other Roman languages grew out of Latin. He then analysed the modern language, as it existed in current popular literature before the time of Coraes, that is, from the time of Theodore Ptochoprodromus to nearly the end of the last century, and showed that the losses and curtailments which it had unquestionably suffered in the course of so many centuries, were not such as materially to impair the strength and beauty of the language, which in its present state was partly to be regarded as a living bridge betwixt the present and the past, and as an altogether unique phenomenon in the history of human speech.


Author(s):  
CHRISTOPH UEHLINGER

This chapter explores the potential use of visual sources, together with the methods employed for studying them, such as iconography or iconology, for the history of ‘ancient Israel’. It describes the theoretical and conceptual framework, particularly the notion of ‘eyewitnessing’, and considers the method, particularly iconography. The chapter also presents case examples chosen from monuments which are so well known to historians of ancient Israel that they are well suited to illustrate both the pitfalls of more conventional interpretations and the potential of alternative approaches. Before turning to the sources – namely visual evidence that may be related to the history of ancient Israel and Judah – the chapter discusses the state of the art among fellow historians in neighbouring disciplines, including those belonging to the so-called ‘humanities’ (or arts and letters). It also considers visual art and history, the metaphor of legal investigation, the balancing of testimony, and the particular status of an eyewitness.


1976 ◽  
Vol 5 (2) ◽  
pp. 155-170 ◽  
Author(s):  
F. J. Blaisdell

The purpose of this paper is to trace in general outlines the historical events which influenced the development of the present state-of-the-art of computer assisted instruction (CAI). The scope of this historical overview includes the salient contributions from the several scientific and engineering disciplines which made CAI possible during the late 1950s.


Author(s):  
Jukka Tyrkkö

This chapter outlines the state of the art in corpus-based language teaching and digital pedagogy, focusing on the differences between using corpora with present-day and historical data. The basic concepts of corpus-based research such as representativeness, frequency, and statistical significance can be introduced to students who are new to corpus methods, and the application of these concepts to the history of English can deepen students’ understanding of how historical varieties of the language are researched. This chapter will also address some of the key challenges particular to teaching the history of English using corpora, such as dealing with the seemingly counterintuitive findings, non-standard features, and small datasets. Finally, following an overview of available historical corpora and corpus tools, several practical examples of corpus-driven activities will be discussed in detail, with suggestions and ideas on how a teacher might prepare and run corpus-based lessons.


Author(s):  
Jean-Pierre Fanton

In this paper, we take the freedom to paraphrase Stephen Hawking's well-known formula and approach, for a reflection about metrology. In fact, metrology has a past, a present, and a future. The past is marked by a rich series of events, of which we shall highlight only those which resulted in major turns. The impact of the French Revolution is indisputably one of them. The present corresponds to a significant evolution, which is the entry of metrology into the world of quantum physics, with the relevant changes in the International System of units (SI). An apercu of the actual state of the art of metrological technology is given. The future is characterised by a persisting need for a still enhanced metrology, in terms of performance and domain covered. In this respect, soft metrology seems to constitute a promising field for research and development.


1978 ◽  
Vol 8 (3) ◽  
pp. 253-268
Author(s):  
F. J. Blaisdell

The purpose of this paper is to trace in general outlines the historical events which influenced the development of the present state-of-the-art of computer assisted instruction (CAI). The scope of this historical overview includes the salient contributions from the several scientific and engineering disciplines which made CAI possible during the late 1950s.


2013 ◽  
Vol 98 (1) ◽  
pp. 70-75 ◽  
Author(s):  
N. Dorairajan ◽  
P.V. Pradeep

Abstract At present, physicians and surgeons treating thyroid disorders can rely on highly accurate and precise investigations, modern equipment, and state of the art operating theater to achieve optimum results; however, this was not the case at the beginning of the treatment of thyroid diseases centuries ago. We present a short history of the treatment and understanding of thyroid diseases in the past few decades. Also we present the contributions of the important surgeons who tried to perfect the treatment of thyroid diseases, including surgery, thus making modern day management easier.


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