scholarly journals Hydrogen molecular ions: H 3 + , H 5 + and beyond

2019 ◽  
Vol 377 (2154) ◽  
pp. 20180395 ◽  
Author(s):  
Jonathan Tennyson ◽  
Steve Miller
Keyword(s):  
Present State ◽  
Royal Society ◽  
State Of The Art ◽  
Molecular Ions

Three decades after the spectroscopic detection of H 3 + in space, the inspiring developments in physics, chemistry and astronomy of H n + ( n  = 3, 5, 7) systems, which led to this Royal Society Discussion Meeting, are reviewed, the present state of the art as represented by the meeting surveyed and future lines of research considered. This article is part of a discussion meeting issue ‘Advances in hydrogen molecular ions: H 3 + , H 5 + and beyond’.

scholarly journals Emmanuel Ciprian Amoroso, 16 September 1901 - 30 October 1982

1985 ◽  
Vol 31 ◽  
pp. 2-30
Keyword(s):  
Present State ◽  
Royal Society ◽  
Scientific Literature ◽  
State Of The Art ◽  
Structure And Function ◽  
British Society ◽  
Factual Information ◽  
The World ◽  
Scientific Reputation ◽  
And Function

Emmanuel Ciprian Amoroso, or ‘Amo’ as he was affectionately known to his thousands of friends and acquaintances around the world, is the only Trinidadian, indeed the only West Indian, to have been elected into the Fellowship of the Royal Society— a signal achievement. That he was able to overcome the prejudices of race and colour, so prevalent in British society particularly in the earlier decades of this century, is a tribute to his great personal charisma, his ability to speak in many tongues and so endear him self to people in nations and cultures very different from our own, and to the sheer force of his intellect. His studies on the formation, structure and function of the mammalian placenta and its role in the evolution of viviparity form the basis of his international scientific reputation. He will be remembered m ore for his ability to absorb a mass of factual information scattered throughout the world’s scientific literature over the last few centuries and to produce a concise, succinct summary of the present state of the art, than as an experimentalist. His skills lay more in observation and interpretation, in the correlation of structure with function, than in the design and execution of planned experiments. But it is as a speaker, indeed as an orator, and as a teacher that he will be best remembered throughout Europe, Australasia, Africa and the Americas. Listening to him deliver a lecture on a formal occasion, one had the distinct impression that if he had not succeeded as a scientist he would have becorme a great actor, or even an inspiring preacher; in a bygone age he would have been one of those great storytellers who could have held his audience enthralled. As Professor Courtenay Batholomew said of him , ‘He had a charisma and an aura about him w hereby when he walked into a gathering one had to enquire: “who is this man?” ’

The Present State of the Art

1984 ◽  
Vol 29 (4) ◽  
pp. 344-346
Author(s):  
Peter A. Magaro
Keyword(s):  
Present State ◽  
State Of The Art

scholarly journals Heavy ion driver for fast ignition

2002 ◽  
Vol 20 (4) ◽  
pp. 595-597 ◽  
Author(s):  
D.G. KOSHKAREV
Keyword(s):  
Present State ◽  
State Of The Art ◽  
Heavy Ion ◽  
Fast Ignition ◽  
Gain Factor ◽  
Powerful Laser ◽  
Burning Process ◽  
Actual Design ◽  
Cylindrical Target ◽  
A Performance

Recently the “fast ignition” method in the ICF problem was considered (Caruso & Pais, 1996). It allows increasing a target gain factor and raising reliability of the burning process. Since the required power of the irradiating beam in this method is unattainable for the traditional type of heavy ion driver with the energy of ions ≤10 GeV, the powerful laser is considered as a possible driver only. Here we investigate the fast ignition method for a system constituted from the directly irradiated cylindrical target and a powerful heavy ion driver of the charge-symmetric type (Koshkarev, 1993) in which the ions with energy ≈100 GeV and mass ≈200 are used. The actual design of a powerful heavy ion driver with the required characteristics is outside the purpose of this article. However some consideration will be given to exploring whether such a performance is within the realm of reasonable extrapolations of the present state of the art.

History of Mathematics in the Islamic World: The Present State of the Art

1985 ◽  
Vol 19 (1) ◽  
pp. 9-33 ◽  
Author(s):  
J. L. Berggren
Keyword(s):  
Present State ◽  
State Of The Art ◽  
History Of Mathematics ◽  
Islamic Culture ◽  
Islamic World ◽  
History Of ◽  
The Subject ◽  
Mathematical Sciences ◽  
Islamic Mathematics

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.

scholarly journals Solar quadrupole moment from planetary ephemerides: present state of the art

2006 ◽  
Vol 2 (14) ◽  
pp. 473-473
Author(s):  
Sophie Pireaux ◽  
E. Myles Standish ◽  
Elena V. Pitjeva ◽  
Jean-Pierre Rozelot
Keyword(s):  
Quadrupole Moment ◽  
Present State ◽  
State Of The Art

AbstractWe discuss the present state of the art of the solar quadrupole moment from planetary ephemerides.

Present State-of-the-Art of Transmission Line Icing

1982 ◽  
Vol PAS-101 (8) ◽  
pp. 2443-2450 ◽  
Author(s):  
Joe Pohlman ◽  
Phillip Landers
Keyword(s):  
Transmission Line ◽  
Present State ◽  
State Of The Art

Some Possible Lines of Development in Aircraft Engines

1921 ◽  
Vol 25 (123) ◽  
pp. 130-165
Keyword(s):  
Present State ◽  
State Of The Art ◽  
Point Of View ◽  
Aircraft Engines ◽  
Aero Engine ◽  
The Ideal

In the following paper the writer's aim is to indicate certain possible lines of development and research which his own investigations and preliminary experiments have shown to be at least worthy of serious consideration.If we review the present state of the art we find the position to be substantially as follows :—From a thermodynamic point of view the performance of the modern aero engine has approached so nearly to the ideal obtainable from the cycle on which it operates that there is little scope for improvement.

scholarly journals Concepts and new perspectives for long span bridges

2016 ◽  
Vol 5 (1) ◽  
pp. 75-97
Author(s):  
Fabio Brancaleoni
Keyword(s):  
Conceptual Design ◽  
Present State ◽  
Critical Parameter ◽  
State Of The Art ◽  
Span Length ◽  
Factors Affecting ◽  
Long Span Bridges ◽  
Future Developments ◽  
Long Span ◽  
The Subject

AbstractA discussion of the dominant factors affecting the behaviour of long span cable supported bridges is the subject of this paper. The main issue is the evolution of properties and response of the bridge with the size of the structure, represented by the critical parameter of span length, showing how this affects the conceptual design. After a review of the present state of the art, perspectives for future developments are discussed.

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