Isaac Newton: Man, Myth, and Mathematics.
Rickey, V. Frederick
1987-01-01
This article was written in part to celebrate the anniversaries of landmark mathematical works by Newton and Descartes. It's other purpose is to dispel some myths about Sir Isaac Newton and to encourage readers to read Newton's works. (PK)
Cox, Carol
2001-01-01
Presents the Isaac Newton Olympics in which students complete a hands-on activity at seven stations and evaluate what they have learned in the activity and how it is related to real life. Includes both student and teacher instructions for three of the activities. (YDS)
May, Andrew
2015-01-01
Isaac Newton had an extraordinary idea. He believed the physical universe and everything in it could be described in exact detail using mathematical relationships. He formulated a law of gravity that explained why objects fall downwards, how the moon causes the tides, and why planets and comets orbit the sun. While Newton's work has been added to over the years, his basic approach remains at the heart of the scientific worldview. Yet Newton's own had little in common with that of a modern scientist. He believed the universe was created to a precise and rational design - a design that was fully
Isaac Newton Institute of Chile: The fifteenth anniversary of its "Yugoslavia" Branch
Dimitrijević, M. S.
In 2002, the Isaac Newton Institute of Chile established in Belgrade its "Yugoslavia" Branch, one of 15 branches in nine countries in Eastern Europe and Eurasia. On the occasion of fifteen years since its foundation, the activities of "Yugoslavia" Branch of the Isaac Newton Institute of Chile are briefly reviewed.
[Isaac Newton's Anguli Contactus method].
Wawrzycki, Jarosław
2014-01-01
In this paper we discuss the geometrical method for calculating the curvature of a class of curves from the third Book of Isaac Newton's Principia. The method involves any curve which is generated from an elementary curve (actually from any curve whose curvature we known of) by means of transformation increasing the polar angular coordinate in a constant ratio, but unchanging the polar radial angular coordinate.
Isaac Newton and the Royal Mint
Indian Academy of Sciences (India)
Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 12. Isaac Newton and the Royal Mint. Biman Nath. Article-in-a-Box Volume 11 Issue 12 December 2006 pp 6-7. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/011/12/0006-0007 ...
Directory of Open Access Journals (Sweden)
E. A. Venter
1964-03-01
Full Text Available Die geweldige oplewing van die Christelike wetenskaps- gedagte in ons geeslose tyd, is ongetwyfeld ’n haas onverklaar- bare verskynsel. Dwarsdeur die eeue het Christene ook wetenskap beoefen saam met ongelowiges, maar dit was eers in ons leeftyd dat die principia van die Christelike religie ook vrugbaar gemaak is vir die wetenskapsbeoefening. In hierdie verband sal die name van Dooyeweerd, Vollenhoven, Stoker e.a. steeds met eer vermeld word. Natuurlik het belydende Christene ook voorheen wel deeglik saamgewerk aan die gebou van die wetenskap. Die intieme verband tussen religie, wysbegeerte en wetenskaps beoefening is toe egter nog nie suiwer ingesien nie. Uit hier die tydperk dateer die arbeid van sir Isaac Newton.
Newton's gift how Sir Isaac Newton unlocked the system of the world
Berlinski, David
2000-01-01
Sir Isaac Newton, creator of the first and perhaps most important scientific theory, is a giant of the scientific era. Despite this, he has remained inaccessible to most modern readers, indisputably great but undeniably remote. In this witty, engaging, and often moving examination of Newton's life, David Berlinski recovers the man behind the mathematical breakthroughs. The story carries the reader from Newton's unremarkable childhood to his awkward undergraduate days at Cambridge through the astonishing year in which, working alone, he laid the foundation for his system of the world, his Principia Mathematica, and to the subsequent monumental feuds that poisoned his soul and wearied his supporters. An edifying appreciation of Newton's greatest accomplishment, Newton's Gift is also a touching celebration of a transcendent man.
Newton's apple Isaac Newton and the English scientific renaissance
Aughton, Peter
2003-01-01
In the aftermath of the English Civil War, the Restoration overturned England's medieval outlook and a new way of looking at the world allowed the genius of Isaac Newton (b. 1642) and his contemporaries to flourish. Newton had a long and eventful life apart from his scentific discoveries. He was born at the beginnings of the Civil War, his studies were disrupted by the twin disasters of the Great Plague and the Fire of London; a brilliant and enigmatic genius, Newton dabbled in alchemy, wrote over a million words on the Bible, quarrelled with his contemporaries and spent his last years as Master of the Royal Mint as well as President of the Royal Society. This book sets Newton's life and work against this dramatic intellectual rebirth; among his friends and contemporaries were Samuel Pepys, the colourful diarist, John Evelyn, the eccentric antiquarian, the astronomers Edmund Halley and John Flamsteed, and Christopher Wren, the greatest architect of his age. They were all instrumental in the founding of the Ro...
Isaac Newton and the astronomical refraction.
Lehn, Waldemar H
2008-12-01
In a short interval toward the end of 1694, Isaac Newton developed two mathematical models for the theory of the astronomical refraction and calculated two refraction tables, but did not publish his theory. Much effort has been expended, starting with Biot in 1836, in the attempt to identify the methods and equations that Newton used. In contrast to previous work, a closed form solution is identified for the refraction integral that reproduces the table for his first model (in which density decays linearly with elevation). The parameters of his second model, which includes the exponential variation of pressure in an isothermal atmosphere, have also been identified by reproducing his results. The implication is clear that in each case Newton had derived exactly the correct equations for the astronomical refraction; furthermore, he was the first to do so.
On the Shoulders of Sir Isaac Newton and Arthur Storer
Martin, Helen E.; Evans-Gondo, Bonita
2013-01-01
Helen E. Martin, the author of this article, is a retired National Board Certified Teacher who has been researching Sir Isaac Newton's unpublished manuscripts for over three decades. While researching the work of Newton, a teacher she was mentoring asked for some hands-on activities to study planetary motion. The description of the activity…
"To Improve upon Hints of Things": Illustrating Isaac Newton.
Schilt, Cornelis J
2016-01-01
When Isaac Newton died in 1727 he left a rich legacy in terms of draft manuscripts, encompassing a variety of topics: natural philosophy, mathematics, alchemy, theology, and chronology, as well as papers relating to his career at the Mint. One thing that immediately strikes us is the textuality of Newton's legacy: images are sparse. Regarding his scholarly endeavours we witness the same practice. Newton's extensive drafts on theology and chronology do not contain a single illustration or map. Today we have all of Newton's draft manuscripts as witnesses of his working methods, as well as access to a significant number of books from his own library. Drawing parallels between Newton's reading practices and his natural philosophical and scholarly work, this paper seeks to understand Newton's recondite writing and publishing politics.
Voltaire-Newton... Renversant!
2004-01-01
The encounter, even improbable, between François Marie Arouet, said Voltaire, and Isaac Newton could occur only in Pays de Gex, near his city... It's indeed right above of the accelerator, in Saint-Genis, that the meeting between this two "monsters" of the 18e century took place
The Newton papers the strange and true odyssey of Isaac Newton's manuscripts
Dry, Sarah
2014-01-01
When Isaac Newton died at 85 without a will on March 20, 1727, he left a mass of disorganized papers-upwards of 8 million words-that presented an immediate challenge to his heirs. Most of these writings, on subjects ranging from secret alchemical formulas to impassioned rejections of the Holy Trinity to notes and calculations on his core discoveries in calculus, universal gravitation, and optics, were summarily dismissed by his heirs as "not fit to be printed." Rabidly heretical, alchemically obsessed, and possibly even mad, the Newton presented in these papers threatened to undermine not just his personal reputation but the status of science itself. As a result, the private papers of the world's greatest scientist remained hidden to all but a select few for over two hundred years. In The Newton Papers, Sarah Dry divulges the story of how this secret archive finally came to light-and the complex and contradictory man it revealed. Covering a broad swath of history, Dry explores who controlled Newton's legacy, ...
Medium-resolution isaac newton telescope library of empirical spectra
Sanchez-Blazquez, P.; Peletier, R. F.; Jimenez-Vicente, J.; Cardiel, N.; Cenarro, A. J.; Falcon-Barroso, J.; Gorgas, J.; Selam, S.; Vazdekis, A.
2006-01-01
A new stellar library developed for stellar population synthesis modelling is presented. The library consists of 985 stars spanning a large range in atmospheric parameters. The spectra were obtained at the 2.5-m Isaac Newton Telescope and cover the range lambda lambda 3525-7500 angstrom at 2.3
The Newtonian Moment - Isaac Newton and the Making of Modern Culture
Feingold, Mordechai
2004-12-01
Isaac Newton is a legendary figure whose mythical dimension threatens to overshadow the actual man. The story of the apple falling from the tree may or may not be true, but Isaac Newton's revolutionary discoveries and their importance to the Enlightenment era and beyond are undeniable. The Newtonian Moment , a companion volume to a forthcoming exhibition by the New York Public Library, investigates the effect that Newton's theories and discoveries had, not only on the growth of science, but also on the very shape of modern culture and thought. Newton's scientific work at Cambridge was groundbreaking. From his optical experiments with prisms during the 1660s to the publication of both Principia (1687) and Opticks (1704), Newton's achievements were widely disseminated, inciting tremendous interest and excitement. Newtonianism developed into a worldview marked by many tensions: between modernity and the old guard, between the humanities and science, and the public battles between great minds. The Newtonian Moment illuminates the many facets of his colossal accomplishments, as well as the debates over the kind of knowledge that his accomplishments engendered. The book contributes to a greater understanding of the world today by offering a panoramic view of the profound impact of Newtonianism on the science, literature, art, and religion of the Enlightenment. Copiously illustrated with items drawn from the collections of the New York Public Library as well as numerous other libraries and museums, The Newtonian Moment enlightens its audience with a guided and in-depth look at the man, his world, and his enduring legacy.
A gravitação universal na filosofia da natureza de Isaac Newton
Garcia, Valdinei Gomes
2010-01-01
Resumo: Esta pesquisa apresenta um estudo sobre o conceito de força gravitacional na filosofia da natureza de Isaac Newton. O presente texto foi elaborado a partir dos argumentos desenvolvidos por Newton para defender esse conceito em sua obra mais importante, o Philosophiae Naturalis Principia Mathematica (1687). Será visto que, em tais argumentos, Newton restringe o conceito de força gravitacional a partir de um tratamento matemático, que ele próprio elaborou em sua obra. Por outro lado, Ne...
How to manage a revolution: Isaac Newton in the early twentieth century
Clarke, Imogen
2014-01-01
In the first half of the twentieth century, dramatic developments in physics came to be viewed as revolutionary, apparently requiring a complete overthrow of previous theories. British physicists were keen to promote quantum physics and relativity theory as exciting and new, but the rhetoric of revolution threatened science's claim to stability and its prestigious connections with Isaac Newton. This was particularly problematic in the first decades of the twentieth century, within the broader context of political turmoil, world war, and the emergence of modernist art and literature. This article examines how physicists responded to their cultural and political environment and worked to maintain disciplinary connections with Isaac Newton, emphasizing the importance of both the old and the new. In doing so they attempted to make the physics ‘revolution’ more palatable to a British public seeking a sense of permanence in a rapidly changing world.
Alquimia: Isaac Newton revisitado Alchemy: Isaac Newton Revisited
Directory of Open Access Journals (Sweden)
Reginaldo Carmello Corrêa de Moraes
1997-01-01
Full Text Available Nota sobre publicações recentes que revelam aspectos pouco conhecidos da biblioteca de Newton - os numerosos textos religiosos, místicos e herméticos. Os biógrafos de Newton resistiram muito até admitir que os escritos esotéricos fossem genuíno interesse do sábio e que tivessem importância para entender sua trajetória intelectual. As publicações aqui indicadas afirmam o contrário, seguindo trilha aberta por ensaio pioneiro de J. M. Keynes (1946.A note on recent books about an unexplored side of Newtons library: religious, mystical and hermetic texts. Newton's biographers had resisted so much to believe that esoteric writings were in Newtons field of interest. Even if they recognized that, they didn't believe those strange works were important elements to understand his intellectual trajectory. The studies we mention here are saying just the opposite thing, exploring the way opened by the pioneer essay of J. M. Keynes (1946.
From the Landgrave in Kassel to Isaac Newton
Høg, E.
2018-01-01
Landgrave Wilhelm IV established in 1560 the first permanent astronomical observatory in Europe. When he met the young Tycho Brahe in 1575 he recognized the genius and recommended him warmly to the Danish king Frederik II. Wilhelm and Tycho must share the credit for renewing astronomy with very accurate observations of positions of stars by new instrumentation and new methods. Tycho's observations of planets during 20 years enabled Johannes Kepler to derive the laws of planetary motion. These laws set Isaac Newton in a position to publish the laws of physical motion and universal gravitation in 1687 - the basis for the technical revolution.
Isaac Newton learns Hebrew: Samuel Johnson's Nova cubi Hebræi tabella
Joalland, Michael; Mandelbrote, Scott
2016-01-01
This article concerns the earliest evidence for Isaac Newton's use of Hebrew: a manuscript copy by Newton of part of a work intended to provide a reader of the Hebrew alphabet with the ability to identify or memorize more than 1000 words and to begin to master the conjugations of the Hebrew verb. In describing the content of this unpublished manuscript and establishing its source and original author for the first time, we suggest how and when Newton may have initially become acquainted with the language. Finally, basing our discussion in part on an examination of the reading marks that Newton left in the surviving copies of Hebrew grammars and lexicons that he owned, we will argue that his interest in Hebrew was not intended to achieve linguistic proficiency but remained limited to particular theological queries of singular concern.
Isaac Newton's scientific method turning data into evidence about gravity and cosmology
Harper, William L.
2014-01-01
Isaac Newton's Scientific Method examines Newton's argument for universal gravity and his application of it to resolve the problem of deciding between geocentric and heliocentric world systems by measuring masses of the sun and planets. William L. Harper suggests that Newton's inferences from phenomena realize an ideal of empirical success that is richer than prediction. Any theory that can achieve this rich sort of empirical success must not only be able to predict the phenomena it purports to explain, but also have those phenomena accurately measure the parameters which explain them. Harper explores the ways in which Newton's method aims to turn theoretical questions into ones which can be answered empirically by measurement from phenomena, and to establish that propositions inferred from phenomena are provisionally accepted as guides to further research. This methodology, guided by its rich ideal of empirical success, supports a conception of scientific progress that does not require construing it as progr...
Bellon, Richard
2014-01-01
For Victorian men of science, the scientific revolution of the seventeenth century represented a moral awakening. Great theoretical triumphs of inductive science flowed directly from a philosophical spirit that embraced the virtues of self-discipline, courage, patience and humility. Isaac Newton exemplified this union of moral and intellectual excellence. This, at least, was the story crafted by scientific leaders like David Brewster, Thomas Chalmers, John Herschel, Adam Sedgwick and William Whewell. Not everyone accepted this reading of history. Evangelicals who decried the 'materialism' of mainstream science assigned a different meaning to Newton's legacy on behalf of their 'scriptural' alternative. High-church critics of science like John Henry Newman, on the other hand, denied that Newton's secular achievements carried any moral significance at all. These debates over Newtonian standards of philosophical behavior had a decisive influence on Charles Darwin as he developed his theory of evolution by natural selection. Copyright © 2014 Elsevier Ltd. All rights reserved.
Isaac newton et la gravitation universelle un scientifique au tempérament rageur
Mettra, Pierre
2015-01-01
Découvrez enfin tout ce qu'il faut savoir sur Newton et la théorie de la gravitation universelle en moins d'une heure ! Figure incontournable de l'histoire des sciences, Isaac Newton bouleverse le monde avec sa théorie de la gravitation universelle. Secrètement passionné d'alchimie, il fait accomplir à l'optique et à l'analyse mathématique d'incroyables progrès, devenant aux yeux de ses contemporains l'un des savants les plus novateurs et les plus respectés au monde, ce que la postérité ne démentira pas.Ce livre vous permettra d'en savoir plus sur : La vie de New
Enlarging the bounds of moral philosophy: Why did Isaac Newton conclude the Opticks the way he did?
Henry, John
2017-01-01
This paper draws attention to the remarkable closing words of Isaac Newton's Optice (1706) and subsequent editions of the Opticks (1718, 1721), and tries to suggest why Newton chose to conclude his book with a puzzling allusion to his own unpublished conclusions about the history of religion. Newton suggests in this concluding passage that the bounds of moral philosophy will be enlarged as natural philosophy is ‘perfected’. Asking what Newton might have had in mind, the paper first considers the idea that he was foreshadowing the ‘moral Newtonianism’ developed later in the eighteenth century; then it considers the idea that he was perhaps pointing to developments in natural theology. Finally, the paper suggests that Newton wanted to at least signal the importance of attempting to recover the true original religion, and perhaps was hinting at his intention to publish his own extensive research on the history of the Church.
Isaac Newton: Eighteenth-century Perspectives
Hall, A. Rupert
1999-05-01
This new product of the ever-flourishing Newton industry seems a bit far-fetched at first sight: who but a few specialists would be interested in the historiography of Newton biography in the eighteenth century? On closer inspection, this book by one of the most important Newton scholars of our day turns out to be of interest to a wider audience as well. It contains several biographical sketches of Newton, written in the decades after his death. The two most important ones are the Eloge by the French mathematician Bernard de Fontenelle and the Italian scholar Paolo Frisi's Elogio. The latter piece was hitherto unavailable in English translation. Both articles are well-written, interesting and sometimes even entertaining. They give us new insights into the way Newton was revered throughout Europe and how not even the slightest blemish on his personality or work could be tolerated. An example is the way in which Newton's famous controversy with Leibniz is treated: Newton is without hesitation presented as the wronged party. Hall has provided very useful historical introductions to the memoirs as well as footnotes where needed. Among the other articles discussed is a well-known memoir by John Conduitt, who was married to Newton's niece. This memoir, substantial parts of which are included in this volume, has been a major source of personal information for Newton biographers up to this day. In a concluding chapter, Hall gives a very interesting overview of the later history of Newton biography, in which he describes the gradual change from adoration to a more critical approach in Newton's various biographers. In short, this is a very useful addition to the existing biographical literature on Newton. A J Kox
Hendry, Archibald W.
2007-01-01
Isaac Newton may have seen an apple fall, but it was Robert Hooke who had a better idea of where it would land. No one really knows whether or not Isaac Newton actually saw an apple fall in his garden. Supposedly it took place in 1666, but it was a tale he told in his old age more than 60 years later, a time when his memory was failing and his…
VizieR Online Data Catalog: Isaac Newton Telescope Wide Field Survey (CASU 2002)
Cambridge Astronomical Survey Unit
2002-04-01
The INT Wide Field Survey (WFS) is using the Wide Field Camera (~0.3 square degrees) on the 2.5m Isaac Newton Telescope (INT). The project was initiated in August 1998 and is expected to have a duration of up to five years. Multicolour data will be obtained over 200+ square degrees to a typical depth of ~25 mag (u' through z'). The data is publically accessible via the Cambridge Astronomical Survey Unit to UK and NL communities from day one, with access to the rest of the world after one year. This observation log lists all observations older than the one year proprietary period. (1 data file).
The Service Programme of the Isaac Newton Group of Telescopes
Méndez, J.
2013-05-01
The Service Programme of the Isaac Newton Group of Telescopes (Roque de los Muchachos Observatory, La Palma, Spain) aims at providing astronomers with a rapid and flexible tool for obtaining small sets of observations on the William Herschel Telescope up to 8 hours. This can be used to try new ideas or complement a regular observing programme allocated on the ING telescopes, for instance. Proposals are accepted from principal investigators working in an institution located in the United Kingdom, the Netherlands or Spain, but also regardless the nationality of the host institution. A monthly deadline for application submission takes place at midnight on the last day of each month but urgent requests submitted at any time can also be accepted. Proposals are generally withdrawn from the scheme after a one year period. In this poster we provide an overview of the programme and some statistics. More information can be obtained at http://www.ing.iac.es/astronomy/service/.
HARPS3 for a roboticized Isaac Newton Telescope
Thompson, Samantha J.; Queloz, Didier; Baraffe, Isabelle; Brake, Martyn; Dolgopolov, Andrey; Fisher, Martin; Fleury, Michel; Geelhoed, Joost; Hall, Richard; González Hernández, Jonay I.; ter Horst, Rik; Kragt, Jan; Navarro, Ramón; Naylor, Tim; Pepe, Francesco; Piskunov, Nikolai; Rebolo, Rafael; Sander, Louis; Ségransan, Damien; Seneta, Eugene; Sing, David; Snellen, Ignas; Snik, Frans; Spronck, Julien; Stempels, Eric; Sun, Xiaowei; Santana Tschudi, Samuel; Young, John
2016-08-01
We present a description of a new instrument development, HARPS3, planned to be installed on an upgraded and roboticized Isaac Newton Telescope by end-2018. HARPS3 will be a high resolution (R≃115,000) echelle spectrograph with a wavelength range from 380-690 nm. It is being built as part of the Terra Hunting Experiment - a future 10- year radial velocity measurement programme to discover Earth-like exoplanets. The instrument design is based on the successful HARPS spectrograph on the 3.6m ESO telescope and HARPS-N on the TNG telescope. The main changes to the design in HARPS3 will be: a customised fibre adapter at the Cassegrain focus providing a stabilised beam feed and on-sky fibre diameter ≍1:4 arcsec, the implementation of a new continuous ow cryostat to keep the CCD temperature very stable, detailed characterisation of the HARPS3 CCD to map the effective pixel positions and thus provide an improved accuracy wavelength solution, an optimised integrated polarimeter and the instrument integrated into a robotic operation. The robotic operation will optimise our programme which requires our target stars to be measured on a nightly basis. We present an overview of the entire project, including a description of our anticipated robotic operation.
Nunan, E.
1973-01-01
Presents a brief biography of Sir Isaac Newton, lists contemporary scientists and scientific developments and discusses Newton's optical research and conceptual position concerning the nature of light. (JR)
Directory of Open Access Journals (Sweden)
Francesco Fiorentino
2015-11-01
Full Text Available This contribution investigates a hidden and surely singular – but far from marginal – aspect of the Scientific Revolution of the 17th century, in other words the interpretation of the Holy Scriptures. First of all, this work analyzes the situation immediately before the advent of the fathers of the 17th Century Scientific Revolution like Galileo Galilei and Isaac Newton, starting from the Council of Trent. This reconstruction aims to throw light on the particular way that Galileo and Newton intended to approach the interpretation of the Holy Scriptures with respect to the main tendencies of the Catholic Reformation of biblical hermeneutics. Their way is important both in itself and in relation to the Scientific Revolution. In itself because Galileo and Newton elaborate original theories that are not entirely in agreement with the predominant views and that are decidedly no less interesting than their pure scientific theories. In relation to the Scientific Revolution because the interpretation of the Holy Scriptures is addressed in an original fashion by both Galileo and Newton, also with the intent of facilitating the spread and approval of their own scientific theories in their respective socio-cultural environments. The primacy of nature is not manifested only in contrast to and outside the book of Scriptures, but conditions the Book of Scriptures, locating it within a precise cultural perspective and religious sense that are by no means contrary to Galileo and Newton’s views.
Ryder, L. H.
1987-01-01
Discusses the history of scientific thought in terms of the theories of inertia and absolute space, relativity and gravitation. Describes how Sir Isaac Newton used the work of earlier scholars in his theories and how Albert Einstein used Newton's theories in his. (CW)
Hall, Alfred Rupert
1982-01-01
The near century (1630–1720) that separates the important astronomical findings of Galileo Galilei (1564–1642) and the vastly influential mathematical work of Sir Isaac Newton (1642–1727) represents a pivotal stage of transition in the history of science. Tracing the revolution in physics initiated by Galileo and culminating in Newton's achievements, this book surveys the work of Huygens, Leeuwenhoek, Boyle, Descartes, and others. 35 illustrations.
2008-01-01
Isaac Newton, besides being the founder of modern physics, was also master of Britain's mint. That is a precedent which many British physicists must surely wish had become traditional. At the moment, money for physics is in short supply in Britain.
Newton's Metaphysics of Space as God's Emanative Effect
Jacquette, Dale
2014-09-01
In several of his writings, Isaac Newton proposed that physical space is God's "emanative effect" or "sensorium," revealing something interesting about the metaphysics underlying his mathematical physics. Newton's conjectures depart from Plato and Aristotle's metaphysics of space and from classical and Cambridge Neoplatonism. Present-day philosophical concepts of supervenience clarify Newton's ideas about space and offer a portrait of Newton not only as a mathematical physicist but an independent-minded rationalist philosopher.
Directory of Open Access Journals (Sweden)
Fábio Marineli
Full Text Available O presente trabalho busca analisar a estrutura argumentativa e as características dos argumentos que aparecem no texto em que Isaac Newton descreve sua "Nova teoria sobre luz e cores", escrito em 1672. Para tanto, o padrão de Toulmin é utilizado como ferramenta analítica. A identificação da estrutura argumentativa de um texto científico pode ajudar na compreensão da construção do argumento na ciência e servir de apoio à utilização da argumentação na educação científica, inclusive na elaboração de textos didáticos. A análise realizada caracterizou os argumentos apresentados no texto e mostrou como se relacionam na elaboração da explicação de Newton para o fenômeno da formação de cores devido à refração da luz em um prisma.
Problem in Two Unknowns: Robert Hooke and a Worm in Newton's Apple.
Weinstock, Robert
1992-01-01
Discusses the place that Robert Hooke has in science history versus the scientific contributions he made. Examines the relationship between Hooke and his contemporary, Isaac Newton, and Hooke's claims that Newton built on his ideas without receiving Newton's recognition. (26 references) (MDH)
Judaism in the theology of Sir Isaac Newton
Goldish, Matt
1998-01-01
This book is based on my doctoral dissertation from the Hebrew University of Jerusalem (1996) of the same title. As a master's student, working on an entirely different project, I was well aware that many of Newton's theological manuscripts were located in our own Jewish National and University Library, but I was under the mistaken assumption that scores of highly qualified scholars must be assiduously scouring them and publishing their results. It never occurred to me to look at them at all until, having fmished my master's, I spoke to Professor David Katz at Tel-Aviv University about an idea I had for doctoral research. Professor Katz informed me that the project I had suggested was one which he himself had just fmished, but that I might be interested in working on the famous Newton manuscripts in the context of a project being organized by him, Richard Popkin, James Force, and the late Betty Jo Teeter Dobbs, to study and publish Newton's theological material. I asked him whether he was not sending me into ...
Catch a falling apple: Isaac Newton and myths of genius.
Fara, P
1999-01-01
Newton has become a legendary figure belonging to the distant past rather than a historical person who lived at a specific time. Historians and scientists have constantly reinterpreted many anecdotal tales describing Newton's achievements and behaviour, but the most famous concerns the falling apple in his country garden. Newton's apple conjures up multiple allegorical resonances, and examining its historical accuracy is less important than uncovering the mythical truths embedded within this symbol. Because interest groups fashion different collective versions of the past, analysing mythical tales can reveal fundamental yet conflicting attitudes towards science and its practices.
Newton and scholastic philosophy.
Levitin, Dmitri
2016-03-01
This article examines Isaac Newton's engagement with scholastic natural philosophy. In doing so, it makes two major historiographical interventions. First of all, the recent claim that Newton's use of the concepts of analysis and synthesis was derived from the Aristotelian regressus tradition is challenged on the basis of bibliographical, palaeographical and intellectual evidence. Consequently, a new, contextual explanation is offered for Newton's use of these concepts. Second, it will be shown that some of Newton's most famous pronouncements - from the General Scholium appended to the second edition of the Principia (1713) and from elsewhere - are simply incomprehensible without an understanding of specific scholastic terminology and its later reception, and that this impacts in quite significant ways on how we understand Newton's natural philosophy more generally. Contrary to the recent historiographical near-consensus, Newton did not hold an elaborate metaphysics, and his seemingly 'metaphysical' statements were in fact anti-scholastic polemical salvoes. The whole investigation will permit us a brief reconsideration of the relationship between the self-proclaimed 'new' natural philosophy and its scholastic predecessors.
British physics Newton's law of funding
2007-01-01
In Britain, fundamental physics is in a pickle ISAAC NEWTON, besides being the founder of modern physics, was also master of Britain's mint. That is a precedent which many British physicists must surely wish had become traditional. At the moment, money for physics is in short supply in Britain.
How Two Differing Portraits of Newton Can Teach Us about the Cultural Context of Science
Tucci, Pasquale
2015-01-01
Like several scientists, Isaac Newton has been represented many times over many different periods, and portraits of Newton were often commissioned by the scientist himself. These portraits tell us a lot about the scientist, the artist and the cultural context. This article examines two very different portraits of Newton that were realized more…
Introducing Newton and classical physics
Rankin, William
2002-01-01
The rainbow, the moon, a spinning top, a comet, the ebb and flood of the oceans ...a falling apple. There is only one universe and it fell to Isaac Newton to discover its secrets. Newton was arguably the greatest scientific genius of all time, and yet he remains a mysterious figure. Written and illustrated by William Rankin, "Introducting Newton and Classical Physics" explains the extraordinary ideas of a man who sifted through the accumulated knowledge of centuries, tossed out mistaken beliefs, and single-handedly made enormous advances in mathematics, mechanics and optics. By the age of 25, entirely self-taught, he had sketched out a system of the world. Einstein's theories are unthinkable without Newton's founding system. He was also a secret heretic, a mystic and an alchemist, the man of whom Edmund Halley said "Nearer to the gods may no man approach!". This is an ideal companion volume to "Introducing Einstein".
Proving Newton Right or Wrong with Blur Photography
Davidhazy, Andrew
2012-01-01
Sir Isaac Newton determined that the acceleration constant for gravity was 32 ft./per/sec/sec. This is a fact that most students become familiar with over time and through various means. This article describes how this can be demonstrated in a technology classroom using simple photographic equipment. (Contains 5 figures.)
You err, Einstein.. Newton, Einstein, Heisenberg, and Feynman discuss quantum physics
International Nuclear Information System (INIS)
Fritzsch, Harald
2008-01-01
Harald Fritzsch and his star physicists Einstein, Heisenberg, and Feynman explain the central concept of nowadays physics, quantum mechanics, without it nothing goes in modern world. And the great Isaac newton puts the questions, which all would put
Goethe's Exposure of Newton's theory a polemic on Newton's theory of light and colour
Goethe, Johann Wolfgang von
2016-01-01
Johann Wolfgang von Goethe, although best known for his literary work, was also a keen and outspoken natural scientist. In the second polemic part of Zur Farbenlehre (Theory of Colours), for example, Goethe attacked Isaac Newton's ground-breaking revelation that light is heterogeneous and not immutable, as was previously thought.This polemic was unanimously rejected by the physicists of the day, and has often been omitted from compendia of Goethe's works. Indeed, although Goethe repeated all of Newton's key experiments, he was never able to achieve the same results. Many reasons have been proposed for this, ranging from the psychological — such as a blind hatred of Newtonism, self-deceit and paranoid psychosis — to accusations of incapability — Goethe simply did not understand the experiments. Yet Goethe was never to be dissuaded from this passionate conviction.This translation of Goethe's second polemic, published for the first time in English, makes it clear that Goethe did understand the thrust of Ne...
A primeira Lei de Newton: uma abordagem didática
da Silva, Saulo Luis Lima
2018-01-01
Resumo No estudo da mecânica Newtoniana o essencial é a compreensão das leis de Newton em profundidade. Se isso acontecer, ficará fácil perceber que todos os outros fenômenos a serem estudados são consequências dessas três leis básicas do movimento formuladas por Isaac Newton. Dentre elas, a primeira lei de Newton, conhecida como lei da Inércia, é a de maior complexidade filosófica e a menos compreendida pelos alunos ao saírem de um curso de física básica. Não é incomum encontrar alunos descr...
Edwards, Howell G M; Hassan, Nik F N; Wilson, Andrew S
2004-10-01
The Raman spectra of two historical specimens of human hair attributed to the engineer Robert Stephenson and scientist Sir Isaac Newton, preserved in private collections are reported. Comparisons are made with the Raman spectra of modern hair specimens and with hair from archaeological excavations. The hair spectra collected with a laser excitation of 785 nm are of a better quality than those collected using 1064 nm. The historical hair specimens are remarkably well-defined spectroscopically in terms of the amide I vibrational mode and the [small nu](SS), ascribed to a predominantly gauche-gauche-gauche CSSC conformation. The contrast with degraded hair specimens recovered from archaeological excavations is striking. The presence of a weak feature near 2590 cm(-1) in the hair samples attributed to a [small nu](SH) vibration could be indicative of a reduction process operative on the CSSC cystine keratotic linkages and a possible origin of this is bacterial biodegradation identified histologically. This study demonstrates the molecular information available from non-destructive Raman spectroscopic analysis from single hair shafts or small bundles of fibres which complements information available from histological and destructive analytical techniques for rare biological specimens subjected to conservation or curation procedures in museums or private collections.
Astronomical and Cosmological Symbolism in Art Dedicated to Newton and Einstein
Sinclair, R.
2013-04-01
Separated by two and a half centuries, Isaac Newton (1642-1727) and Albert Einstein (1879-1955) had profound impacts on our understanding of the universe. Newton established our understanding of universal gravitation, which was recast almost beyond recognition by Einstein. Both discovered basic patterns behind astronomical phenomena and became the best-known scientists of their respective periods. I will describe here how artists of the 18th and 20th centuries represented the achievements of Newton and Einstein. Representations of Newton express reverence, almost an apotheosis, portraying him as the creator of the universe. Einstein, in a different age, is represented often as a comic figure, and only rarely do we find art that hints at the profound view of the universe he developed.
Newton and the origin of civilization
Buchwald, Jed Z
2012-01-01
Isaac Newton's Chronology of Ancient Kingdoms Amended, published in 1728, one year after the great man's death, unleashed a storm of controversy. And for good reason. The book presents a drastically revised timeline for ancient civilizations, contracting Greek history by five hundred years and Egypt's by a millennium. Newton and the Origin of Civilization tells the story of how one of the most celebrated figures in the history of mathematics, optics, and mechanics came to apply his unique ways of thinking to problems of history, theology, and mythology, and of how his radical ideas produced an uproar that reverberated in Europe's learned circles throughout the eighteenth century and beyond. Jed Buchwald and Mordechai Feingold reveal the manner in which Newton strove for nearly half a century to rectify universal history by reading ancient texts through the lens of astronomy, and to create a tight theoretical system for interpreting the evolution of civilization on the basis of population dynamics. It was duri...
Jaeger, W
1984-04-01
Since Aristotle there have been two colour order systems: The first is according to the subjective luminosity of colours, and the second is that which is found in the rainbow. Almost all the medieval concepts of colour order were based on the subjective luminosity of colours. At the beginning of the 17th century Franciscus Aguilonius still described the traditional sequence according to subjective luminosity: white, yellow, red, blue and black in his colour order system. - Athanasius Kircher demonstrated two sequences: The first was the same as Aguilonius 's, completed by lists of symbolic qualities attributed to the respective colours; The second was the sequence of the prismatic spectrum; red, orange, yellow, green and blue. Violet was still missing from his spectrum. For that reason the idea of arranging the colours in a closed circle did not occur to him. - Isaac Newton added violet to the prismatic spectrum. Hence he was able to bring the ends of the spectrum together, forming a colour circle. He completed the colours of his spectrum "with those purple hues which, although not present in the spectrum, were familiar to painters and dyers , and in this way closed up the colour-circle into a band returning on itself" (W. Ostwald). Thus he combined the perceptual concept of the colour wheel, containing pairs of complementary colours, with the physical concept of the prismatic spectrum.
Fara, Patricia
2015-04-13
Isaac Newton's reputation was initially established by his 1672 paper on the refraction of light through a prism; this is now seen as a ground-breaking account and the foundation of modern optics. In it, he claimed to refute Cartesian ideas of light modification by definitively demonstrating that the refrangibility of a ray is linked to its colour, hence arguing that colour is an intrinsic property of light and does not arise from passing through a medium. Newton's later significance as a world-famous scientific genius and the apparent confirmation of his experimental results have tended to obscure the realities of his reception at the time. This paper explores the rhetorical strategies Newton deployed to convince his audience that his conclusions were certain and unchallengeable. This commentary was written to celebrate the 350th anniversary of the journal Philosophical Transactions of the Royal Society.
Spyromilio, J.; Cuby, J.; Lidman, C.; Johnson, R.; Jaunsen, A. O.; Mason, E.; Ivanov, V. D.; Schmidtobreick, L.
2014-03-01
ISAAC was switched off, almost certainly for the final time, on 12 December 2013. The last observing block executed was OB1030962, the target, Supernova 2013ct, for a programme whose principal investigator just happened to be the first instrument scientist for ISAAC. "All constraints were respected and spectra of the target detected" are the public comments in the log. A short history of ISAAC, from the instrument scientists' viewpoint, is presented.
Fara, Patricia
2015-01-01
Isaac Newton's reputation was initially established by his 1672 paper on the refraction of light through a prism; this is now seen as a ground-breaking account and the foundation of modern optics. In it, he claimed to refute Cartesian ideas of light modification by definitively demonstrating that the refrangibility of a ray is linked to its colour, hence arguing that colour is an intrinsic property of light and does not arise from passing through a medium. Newton's later significance as a world-famous scientific genius and the apparent confirmation of his experimental results have tended to obscure the realities of his reception at the time. This paper explores the rhetorical strategies Newton deployed to convince his audience that his conclusions were certain and unchallengeable. This commentary was written to celebrate the 350th anniversary of the journal Philosophical Transactions of the Royal Society. PMID:25750143
Newton's Investigation of Light and Color: Historical and Experimental Notes. Experiment No. 7.
Devons, Samuel
The life and work of Isaac Newton and his investigations of light and color are described in detail. Notes include preliminary observations of chromatic dispersion; dispersion by an equilateral prism; the "Experimentum Crucos" or the composite nature of white light; the nature of colored light and illumination; transmissions and reflections; and…
Bohlin transformation: the hidden symmetry that connects Hooke to Newton
International Nuclear Information System (INIS)
Saggio, Maria Luisa
2013-01-01
Hooke's name is familiar to students of mechanics thanks to the law of force that bears his name. Less well-known is the influence his findings had on the founder of mechanics, Isaac Newton. In a lecture given some twenty years ago, W Arnol'd pointed out the outstanding contribution to science made by Hooke, and also noted the controversial issue of the attribution of important discoveries to Newton that were actually inspired by Hooke. It therefore seems ironic that the two most famous force laws, named after Hooke and Newton, are two geometrical aspects of the same law. This relationship, together with other illuminating aspects of Newtonian mechanics, is described in Arnol'd's book and is worth remembering in standard physics courses. In this didactical paper the duality of the two forces is expounded and an account of the more recent contributions to the subject is given. (paper)
Steinberg, Melvin S.; And Others
Recent research has shown that serious misconceptions frequently survive high school and university instruction in mechanics. It is interesting to inquire whether Newton himself encountered conceptual difficulties before he wrote the "Principia." This paper compares Newton's pre-"Principia" beliefs, based upon his writings,…
Devons, Samuel
This paper attempts to promote an understanding of physics through its history and replication of the oscillation experiments of Isaac Newton and Daniel Bernoulli from the 17th and 18th centuries. The experiments described can be treated at a level of sophistication to suit the interests and capabilities of the student. Reproductions in the…
Gilbert, Robert; Kajiwara, Joji
2000-01-01
This book is the Proceedings of the Second ISAAC Congress. ISAAC is the acronym of the International Society for Analysis, its Applications and Computation. The president of ISAAC is Professor Robert P. Gilbert, the second named editor of this book, e-mail: gilbert@math.udel.edu. The Congress is world-wide valued so highly that an application for a grant has been selected and this project has been executed with Grant No. 11-56 from *the Commemorative Association for the Japan World Exposition (1970). The finance of the publication of this book is exclusively the said Grant No. 11-56 from *. Thus, a pair of each one copy of two volumes of this book will be sent to all contributors, who registered at the Second ISAAC Congress in Fukuoka, free of charge by the Kluwer Academic Publishers. Analysis is understood here in the broad sense of the word, includ ing differential equations, integral equations, functional analysis, and function theory. It is the purpose of ISAAC to promote analysis, its applications, and...
Westfall, Richard S
1994-01-01
Le plus célèbre des savants, Isaac Newton, est aussi celui qui a le plus de biographes. Avant même sa mort, en 1727, l'un d'eux publiait un récit de la vie du grand homme. Richard Westfall, universitaire américain, est aujourd'hui le meilleur connaisseur d'un personnage en tout point extraordinaire, dont Aldous Huxley disait : « En tant qu'homme, c'est un fiasco ; en tant que monstre, il est superbe ! » Découvrant à 24 ans la loi de la gravitation universelle, établissant peu après les lois de l'optique tout en poursuivant des études alchimiques et théologiques, cet homme capable de rester des jours entiers sans manger ni dormir, absorbé par les énigmes du savoir, connaît une grave dépression dont il réchappe de justesse... pour se consacrer à l'économie de son pays : il devient directeur de la Monnaie de Londres, organisant une impitoyable chasse aux faux-monnayeurs ! L'image d'Épinal de Newton regardant une pomme tomber sort enrichie et complexifiée de ce livre fruit d'une vie de reche...
The calculus gallery masterpieces from Newton to Lebesgue
Dunham, William
2008-01-01
More than three centuries after its creation, calculus remains a dazzling intellectual achievement and the gateway into higher mathematics. This book charts its growth and development by sampling from the work of some of its foremost practitioners, beginning with Isaac Newton and Gottfried Wilhelm Leibniz in the late seventeenth century and continuing to Henri Lebesgue at the dawn of the twentieth--mathematicians whose achievements are comparable to those of Bach in music or Shakespeare in literature. William Dunham lucidly presents the definitions, theorems, and proofs. ""Students of literat
Westfall, Richard S
2007-01-01
Definitive, concise, and very interesting... From William Shakespeare to Winston Churchill, the Very Interesting People series provides authoritative bite-sized biographies of Britain's most fascinating historical figures - people whose influence and importance have stood the test of time. Each book in the series is based upon the biographical entry from the world-famous Oxford Dictionary of National Biography. -
Newtonian cosmology Newton would understand
International Nuclear Information System (INIS)
Lemons, D.S.
1988-01-01
Isaac Newton envisioned a static, infinite, and initially uniform, zero field universe that was gravitationally unstable to local condensations of matter. By postulating the existence of such a universe and using it as a boundary condition on Newtonian gravity, a new field equation for gravity is derived, which differs from the classical one by a time-dependent cosmological term proportional to the average mass density of the universe. The new field equation not only makes Jeans' analysis of the gravitational instability of a Newtonian universe consistent, but also gives rise to a family of Newtonian evolutionary cosmologies parametrized by a time-invariant expansion velocity. This Newtonian cosmology contrasts with both 19th-century ones and with post general relativity Newtonian cosmology
Conference | From Newton to Hawking and beyond | 28 May
2013-01-01
From Newton to Hawking and beyond: Why disability equality is relevant to the world of particle physics, Dr Tom Shakespeare. Tuesday, 28 May 2013 - 11.30 am - 1 pm Main Auditorium – Room 500-1-001 Conference organised by the CERN Diversity Programme English with French interpretation According to the recent world report on disability, 15% of the world’s population is disabled. Among that group could be numbered famous physicists such as Isaac Newton and Paul Dirac, neither of whom could be classed as “neuro-typical”, and Stephen Hawking. This presentation will provide some basic data about global disability, and the socially imposed barriers which disabled people face. It will also include some stories about high achieving people with disabilities. Finally, some practical suggestions will be offered on how to respect and include people with disabilities in the workplace. Tom Shakespeare is a social sci...
Directory of Open Access Journals (Sweden)
Frank G. Bosman
2018-04-01
Full Text Available The game The Binding of Isaac is an excellent example of a game that incorporates criticism of religion. Isaac is a roguelike dungeon crawler with randomly generated dungeons. Both from the perspective of narrative and of game design, McMillen built The Binding of Isaac around the Biblical story of Genesis 22:1-19, which has the same name in Jewish and Christian tradition, but he placed it in a modern-day setting in which a young boy is endangered by a mentally disturbed mother who hears “voices from above” that instruct her to sacrifice her only child. Multiple critical references to Christianity can be found in addition to the narrative: hostile embodiments of the seven deadly sins, rosaries, Bibles, and crucifixes, and unlockable characters, such as Mary Magdalene, Judas Iscariot, Samson, and Cain, who are all depicted negatively in both Jewish and Christian traditions. McMillen’s inspiration came from his own experiences with his family, which was made up of both Catholics and born-again Christians. The game describes both the dark creativity and the mental and physical abuse associated with religion. In this article, we analyse the narrative of The Binding of Isaac by performing an intertextual comparison with the Biblical narrative of Genesis 22:1-19. We then analyse the three-fold narrative structure of the game which enhances and nuances the criticism the game directs at religion.
280 one-opposition near-Earth asteroids recovered by the EURONEAR with the Isaac Newton Telescope
Vaduvescu, O.; Hudin, L.; Mocnik, T.; Char, F.; Sonka, A.; Tudor, V.; Ordonez-Etxeberria, I.; Díaz Alfaro, M.; Ashley, R.; Errmann, R.; Short, P.; Moloceniuc, A.; Cornea, R.; Inceu, V.; Zavoianu, D.; Popescu, M.; Curelaru, L.; Mihalea, S.; Stoian, A.-M.; Boldea, A.; Toma, R.; Fields, L.; Grigore, V.; Stoev, H.; Lopez-Martinez, F.; Humphries, N.; Sowicka, P.; Ramanjooloo, Y.; Manilla-Robles, A.; Riddick, F. C.; Jimenez-Lujan, F.; Mendez, J.; Aceituno, F.; Sota, A.; Jones, D.; Hidalgo, S.; Murabito, S.; Oteo, I.; Bongiovanni, A.; Zamora, O.; Pyrzas, S.; Génova-Santos, R.; Font, J.; Bereciartua, A.; Perez-Fournon, I.; Martínez-Vázquez, C. E.; Monelli, M.; Cicuendez, L.; Monteagudo, L.; Agulli, I.; Bouy, H.; Huélamo, N.; Monguió, M.; Gänsicke, B. T.; Steeghs, D.; Gentile-Fusillo, N. P.; Hollands, M. A.; Toloza, O.; Manser, C. J.; Dhillon, V.; Sahman, D.; Fitzsimmons, A.; McNeill, A.; Thompson, A.; Tabor, M.; Murphy, D. N. A.; Davies, J.; Snodgrass, C.; Triaud, A. H. M. J.; Groot, P. J.; Macfarlane, S.; Peletier, R.; Sen, S.; İkiz, T.; Hoekstra, H.; Herbonnet, R.; Köhlinger, F.; Greimel, R.; Afonso, A.; Parker, Q. A.; Kong, A. K. H.; Bassa, C.; Pleunis, Z.
2018-01-01
Context. One-opposition near-Earth asteroids (NEAs) are growing in number, and they must be recovered to prevent loss and mismatch risk, and to improve their orbits, as they are likely to be too faint for detection in shallow surveys at future apparitions. Aims: We aimed to recover more than half of the one-opposition NEAs recommended for observations by the Minor Planet Center (MPC) using the Isaac Newton Telescope (INT) in soft-override mode and some fractions of available D-nights. During about 130 h in total between 2013 and 2016, we targeted 368 NEAs, among which 56 potentially hazardous asteroids (PHAs), observing 437 INT Wide Field Camera (WFC) fields and recovering 280 NEAs (76% of all targets). Methods: Engaging a core team of about ten students and amateurs, we used the THELI, Astrometrica, and the Find_Orb software to identify all moving objects using the blink and track-and-stack method for the faintest targets and plotting the positional uncertainty ellipse from NEODyS. Results: Most targets and recovered objects had apparent magnitudes centered around V 22.8 mag, with some becoming as faint as V 24 mag. One hundred and three objects (representing 28% of all targets) were recovered by EURONEAR alone by Aug. 2017. Orbital arcs were prolonged typically from a few weeks to a few years; our oldest recoveries reach 16 years. The O-C residuals for our 1854 NEA astrometric positions show that most measurements cluster closely around the origin. In addition to the recovered NEAs, 22 000 positions of about 3500 known minor planets and another 10 000 observations of about 1500 unknown objects (mostly main-belt objects) were promptly reported to the MPC by our team. Four new NEAs were discovered serendipitously in the analyzed fields and were promptly secured with the INT and other telescopes, while two more NEAs were lost due to extremely fast motion and lack of rapid follow-up time. They increase the counting to nine NEAs discovered by the EURONEAR in 2014 and
[A case of Isaacs' syndrome associated with dextrocardia].
Torres, L; Cosentino, C; Vélez, M; Anicama, A
Isaacs syndrome is a disorder of unknown etiology characterized by muscular rigidity, cramps and myokymias. Described by Isaacs in 1961 and called by him as continuous muscular activity syndrome. There are few reports in Latino american countries. A 31 year-old man with sustained muscular contractions in lower limbs and diffuse myokymias since he was eighteen-year old. Dextrocardia was disclosed on clinical examination. We report the case of a patient with Isaacs syndrome and dextrocardia.
International Nuclear Information System (INIS)
Dias, Penha Maria Cardozo; Stuchi, T J
2013-01-01
In a letter to Robert Hooke, Isaac Newton drew the orbit of a mass moving under a constant attracting central force. The drawing of the orbit may indicate how and when Newton developed dynamic categories. Some historians claim that Newton used a method contrived by Hooke; others that he used some method of curvature. We prove that Hooke’s method is a second-order symplectic area-preserving algorithm, and the method of curvature is a first-order algorithm without special features; then we integrate the Hamiltonian equations. Integration by the method of curvature can also be done, exploring the geometric properties of curves. We compare three methods: Hooke’s method, the method of curvature and a first-order method. A fourth-order algorithm sets a standard of comparison. We analyze which of these methods best explains Newton’s drawing. (paper)
Cardozo Dias, Penha Maria; Stuchi, T. J.
2013-11-01
In a letter to Robert Hooke, Isaac Newton drew the orbit of a mass moving under a constant attracting central force. The drawing of the orbit may indicate how and when Newton developed dynamic categories. Some historians claim that Newton used a method contrived by Hooke; others that he used some method of curvature. We prove that Hooke’s method is a second-order symplectic area-preserving algorithm, and the method of curvature is a first-order algorithm without special features; then we integrate the Hamiltonian equations. Integration by the method of curvature can also be done, exploring the geometric properties of curves. We compare three methods: Hooke’s method, the method of curvature and a first-order method. A fourth-order algorithm sets a standard of comparison. We analyze which of these methods best explains Newton’s drawing.
Programming for the Newton software development with NewtonScript
McKeehan, Julie
1994-01-01
Programming for the Newton: Software Development with NewtonScript focuses on the processes, approaches, operations, and principles involved in software development with NewtonScript.The publication first elaborates on Newton application design, views on the Newton, and protos. Discussions focus on system protos, creating and using user protos, linking and naming templates, creating the views of WaiterHelper, Newton application designs, and life cycle of an application. The text then elaborates on the fundamentals of NewtonScript, inheritance in NewtonScript, and view system and messages. Topi
2000-02-01
hectic behaviour of stars at the end of their life". The Calibration and Performance Verification phase for XMM-Newton's science instruments is to begin on 3 March, with routine science operations starting in June. (*)Pictures available on the ESA website at http://www.esa.int, then Image Gallery, then News and at http://sci.esa.int/xmm/firstimages Following in Newton's footsteps The European Space Agency has decided to honour one of the world's most illustrious scientists by giving the name of Isaac Newton to the XMM mission. The X-ray space telescope is henceforth called the XMM-Newton observatory. The work of Sir Isaac Newton (1642-1727) in the field of mathematics, optics and physics laid the foundations for modern science. He made a major impact on theoretical and practical astronomy and today one cannot evoke an apple, a reflecting telescope, a light-splitting prism and or a sextant without recalling Newton's contributions to science. "We have chosen this name because Sir Isaac Newton was the man who invented spectroscopy and XMM is a spectroscopy mission" explains Prof. Roger Bonnet ESA Director of Science. "The name of Newton is associated with the falling apple, which is the symbol of gravity and with XMM I hope that we will find a large number of black hole candidates which are of course associated with the theory of gravity. There was no better choice of name than XMM-Newton for this mission". Stargazing with XMM-Newton On the occasion of the presentation of the X-ray observatory's first images, the European Space Agency is launching "Stargazing", the third XMM-Newton competition. European youngsters, 16 to 18 years old at the end of secondary school, will be able to win observing time using the X-ray telescope. "We are extending the concept of backyard astronomy" says Prof. Bonnet. "Through this telescope's ability to be operated from the ground in a friendly way, young people will be offered a unique opportunity to learn how to operate and manage an
[The Galenic content of Isaac Beeckman's medical ideas (1617-1629)].
Moreau, Elisabeth
2011-01-01
The Journal tenu par Isaac Beeckman de 1604 à 1634 has been studied in the history of the seventeenth-century scientific revolution following the theme of Isaac Beeckman's physical mathematical mechanistic view, his proto-molecular theory and his atomistic Lucretian influence. This article goes deeper into the medical ideas of the Journal: how Isaac Beeckman (1588-1637) settles the structure of living matter according to his intensive reading of Galen. It develops a different analysis from the traditionally triumphalist approach in the history of science, focused on the victory of Cartesian mechanism, particularly in the history of medicine taking up Galenism very briefly because of its obsolete physiology. The Galenic corpus inside Isaac Beeckman's Journal consists of the many commentaries of Galen which Beeckman has put down in writing since 1616 until 1627, after when the passages linked to Galen became fewer. Isaac Beeckman's study of Galenic medicine is analyzed according to three approaches: the teleological dimension of Galenism showing up the organic conception of human body corresponding to the divine Providence and consistent with Beeckman's Calvinist belief, the physiologic angle of Galenism, based on natural faculties, stressing the purely speculative aspect of Beeckman's commentaries, while the pathologic and therapeutic angle supports the Hippocratic humourism influence.
2010-07-06
... temporary safety zone on the St. Mary's River, Sault Sainte Marie, Michigan. This zone is intended to..., St. Mary's River, Sault Sainte Marie, MI (a) Location. The following area is a temporary safety zone...-AA00 Safety Zone; Sault Sainte Marie 4th of July Fireworks, St. Mary's River, Sault Sainte Marie, MI...
Stuchi, Teresa; Cardozo Dias, P.
2013-05-01
Abstract (2,250 Maximum Characters): On a letter to Robert Hooke, Isaac Newton drew the orbit of a mass moving under a constant attracting central force. How he drew the orbit may indicate how and when he developed dynamic categories. Some historians claim that Newton used a method contrived by Hooke; others that he used some method of curvature. We prove geometrically: Hooke’s method is a second order symplectic area preserving algorithm, and the method of curvature is a first order algorithm without special features; then we integrate the hamiltonian equations. Integration by the method of curvature can also be done exploring geometric properties of curves. We compare three methods: Hooke’s method, the method of curvature and a first order method. A fourth order algorithm sets a standard of comparison. We analyze which of these methods best explains Newton’s drawing.
Ruzhansky, Michael; Analytic Methods in Interdisciplinary Applications
2015-01-01
The book includes lectures given by the plenary and key speakers at the 9th International ISAAC Congress held 2013 in Krakow, Poland. The contributions treat recent developments in analysis and surrounding areas, concerning topics from the theory of partial differential equations, function spaces, scattering, probability theory, and others, as well as applications to biomathematics, queueing models, fractured porous media and geomechanics.
Westfall, Richard S.
2015-10-01
Acknowledgements; A note about dates; 1. A sober, silent, thinking lad; 2. The solitary scholar; 3. Anni Mirabilis; 4. Lucasian professor; 5. Publication and crisis; 6. Rebellion; 7. Years of silence; 8. Principia; 9. Revolution; 10. The Mint; 11. President of the Royal Society; 12. The priority dispute; 13. Years of decline; Biographical essay; Index.
McIsaac criteria for diagnosis of acute group-A β-hemolytic streptococcal pharyngitis
Directory of Open Access Journals (Sweden)
Imanuel Y. Malino
2013-10-01
Conclusion A McIsaac criteria total score of <4 is favorable for excluding a diagnosis of GABHS pharyngitis. A McIsaac total criteria score of ≥4 requires further examination to confirm a diagnosis of GABHS pharyngitis.
'Speaking Kleinian': Susan Isaacs as Ursula Wise and the Inter-War Popularisation of Psychoanalysis.
Shapira, Michal
2017-10-01
How did the complex concepts of psychoanalysis become popular in early twentieth-century Britain? This article examines the contribution of educator and psychoanalyst Susan Isaacs (1885-1948) to this process, as well as her role as a female expert in the intellectual and medical history of this period. Isaacs was one of the most influential British psychologists of the inter-war era, yet historical research on her work is still limited. The article focuses on her writing as 'Ursula Wise', answering the questions of parents and nursery nurses in the popular journal Nursery World, from 1929 to 1936. Researched in depth for the first time, Isaacs' important magazine columns reveal that her writing was instrumental in disseminating the work of psychoanalyst Melanie Klein in Britain. Moreover, Isaacs' powerful rebuttals to behaviourist, disciplinarian parenting methods helped shift the focus of caregivers to the child's perspective, encouraging them to acknowledge children as independent subjects and future democratic citizens. Like other early psychoanalysts, Isaacs was not an elitist; she was in fact committed to disseminating her ideas as broadly as possible. Isaacs taught British parents and child caregivers to 'speak Kleinian', translating Klein's intellectual ideas into ordinary language and thus enabling their swift integration into popular discourse.
Advanced nursing practice and Newton's three laws of motion.
Sturgeon, David
This article considers the reasons for the development of advanced practice roles among nurses and other healthcare professions. It explores the implications of financial constraints, consumer preferences and the development of new healthcare services on the reorganization of professional boundaries. It makes use of Sir Isaac Newton's three laws of motion to demonstrate how professional development in nursing has taken place in response to a number of external influences and demands. It also considers the significance of skill mix for the nursing profession, in particular the development and likely expansion of the physician assistant role. The application of different professionals and grades within a healthcare team or organization is central to the Government's Agenda for Change proposals and nurses have successfully adopted a number of roles traditionally performed by doctors. Nurses have demonstrated that they are capable of providing high quality care and contributing directly to positive patient outcome. Advanced nursing roles should not only reflect the changing nature of healthcare work, they should also be actively engaged in reconstructing healthcare boundaries.
Gorozave-Car, Karla; Barraza-Villarreal, Albino; Escamilla-Núñez, Consuelo; Hernandez-Cadena, Leticia; Sanín-Aguirre, Luz Helena; Cortez-Lugo, Marlene; Blanco-Muñoz, J.; Riojas-Rodríguez, Horacio; Moreno-Macias, Hortensia; Romieu, Isabelle
2013-01-01
Background. In Mexico, several studies have been conducted under the ISAAC methodology; nevertheless, no validation studies of the ISAAC questionnaire based on objective clinical testing in our country have been published. Aims of the Study. To validate the ISAAC questionnaire, used in a study of prevalence of allergic diseases, based on medical, respiratory, and allergic evaluations of schoolchildren being 11 to 16 years old in Mexicali, Mexico. Material and Methods. We conducted a cross-sec...
Mechanics and Newton-Cartan-like gravity on the Newton-Hooke space-time
International Nuclear Information System (INIS)
Tian Yu; Guo Hanying; Huang Chaoguang; Xu Zhan; Zhou Bin
2005-01-01
We focus on the dynamical aspects on Newton-Hooke space-time NH + mainly from the viewpoint of geometric contraction of the de Sitter spacetime with Beltrami metric. (The term spacetime is used to denote a space with non-degenerate metric, while the term space-time is used to denote a space with degenerate metric.) We first discuss the Newton-Hooke classical mechanics, especially the continuous medium mechanics, in this framework. Then, we establish a consistent theory of gravity on the Newton-Hooke space-time as a kind of Newton-Cartan-like theory, parallel to the Newton's gravity in the Galilei space-time. Finally, we give the Newton-Hooke invariant Schroedinger equation from the geometric contraction, where we can relate the conservative probability in some sense to the mass density in the Newton-Hooke continuous medium mechanics. Similar consideration may apply to the Newton-Hooke space-time NH - contracted from anti-de Sitter spacetime
BSDES IN GAMES, COUPLED WITH THE VALUE FUNCTIONS.ASSOCIATED NONLOCAL BELLMAN-ISAACS EQUATIONS
Institute of Scientific and Technical Information of China (English)
Tao HAO; Juan LI
2017-01-01
We establish a new type of backward stochastic differential equations (BSDEs) connected with stochastic differential games (SDGs),namely,BSDEs strongly coupled with the lower and the upper value functions of SDGs,where the lower and the upper value functions are defined through this BSDE.The existence and the uniqueness theorem and comparison theorem are proved for such equations with the help of an iteration method.We also show that the lower and the upper value functions satisfy the dynamic programming principle.Moreover,we study the associated Hamilton-Jacobi-Bellman-Isaacs (HJB-Isaacs) equations,which are nonlocal,and strongly coupled with the lower and the upper value functions.Using a new method,we characterize the pair (W,U) consisting of the lower and the upper value functions as the unique viscosity solution of our nonlocal HJB-Isaacs equation.Furthermore,the game has a value under the Isaacs' condition.
Birks, J. L.
2013-03-01
In 1712 Sir Isaac Newton and Dr Edmund Halley, acting on behalf of the Royal Society, printed some 400 copies of the star catalogue Historia Coelestis under the name of John Flamsteed, including his observations of the positions of nearly 3000 stars made at Greenwich from 1676. Flamsteed had not been allowed to check the proofs of this work before it was published, and he was enraged to see what he considered to be a travesty of his life's work. This became a great scientific scandal of the early eighteenth century, which echoes down to the present day.
1378-IJBCS-Article-Isaac Bertrand Mbowou Gbambi
African Journals Online (AJOL)
hp
Ti-bearing aenigmatite from Djinga Tadorgal (Adamawa plateau) and Sao. Tomé (Cameroon Line) phonolites: geochemical implications and application of the QUILF thermobarometer for the crystallization conditions. Isaac Bertrand Gbambié MBOWOU 1*, Dagwaï NGUIHDAMA 2, Fadimatou Ngounouno. YAMGOUOT 3 ...
The Principia and its author - a physicist's viewpoint
Evans, W. A. B.
1987-11-01
The author discusses the place of Sir Isaac Newton's 'Principia' in the history of physics. He provides a short biography of Newton and his work and discusses the importance of Newton's work in modern physics teaching.
International Nuclear Information System (INIS)
Pajot, Ph.; Schaeffer, A.; Barhelemy, P.
2011-01-01
This issue is almost entirely dedicated to Marie Curie. The first part gives the main steps of her life, an article draws a parallel with Lise Meitner's life, another describes the instruments Marie Curie used to measure radioactivity and a third one gives an idea of the network of scientists she integrated. The second part presents the scientific heritage of Marie Curie, first the curietherapy then medical imaging and radiocarbon dating. The third part presents other achievements and commitments of Marie Curie concerning the place of women in a modern society and the social changes trough scientific progress. (A.C.)
Fractal aspects and convergence of Newton`s method
Energy Technology Data Exchange (ETDEWEB)
Drexler, M. [Oxford Univ. Computing Lab. (United Kingdom)
1996-12-31
Newton`s Method is a widely established iterative algorithm for solving non-linear systems. Its appeal lies in its great simplicity, easy generalization to multiple dimensions and a quadratic local convergence rate. Despite these features, little is known about its global behavior. In this paper, we will explain a seemingly random global convergence pattern using fractal concepts and show that the behavior of the residual is entirely explicable. We will also establish quantitative results for the convergence rates. Knowing the mechanism of fractal generation, we present a stabilization to the orthodox Newton method that remedies the fractal behavior and improves convergence.
Jorge Isaacs: El espíritu radical de un poeta y sus frustraciones políticas
Directory of Open Access Journals (Sweden)
Raúl Vallejo Corral
2015-02-01
Full Text Available Jorge Isaacs es conocido por María (1867, novela cumbre del romanticismo americano. Pero Isaacs, además, fue un político liberal radical que llevó adelante una revolución, en enero de 1880, movido por sus principios ideológicos en medio de lo que él consideraba la traición de los liberales. La revolución, embebida de romanticismo, fue una empresa romántica destinada al fracaso desde un principio. Este artículo, a partir del estudio de los documentos de la época, analiza de qué manera Isaacs desarrolló sus actividades militantes, como superintendente de Educación, primero, como congresista, después, y como revolucionario, en el marco del proceso de recuperación del poder por parte de los conservadores. Asimismo, este artículo se enfoca en el espíritu romántico que animó a Isaacs y cómo se expresó a través de la palabra encendida de los manifiestos, proclamas, cartas e informes recopilados por el propio Isaacs en su libro La revolución radical en Antioquia (1880. Jorge Isaacs is well-known for Maria (1867, which is considered the most important novel of Latin American romanticism. But Isaacs was also a radical liberal politician who carried forward a revolution, in January 1880, moved by his ideological principles in the midst of what he considered to be the treason of the liberals. From the very beginning, this revolution, which was immersed in romanticism, was an enterprise destined to fail. This article, based on the study of documents from that time, analyzes the way in which Isaacs developed his militant activities firstly as an Education inspector, then as a congressman, and finally as a revolutionary in the framework of the recovery process by the conservative party. Likewise, this article focuses on the romantic spirit that inspired Isaacs and how he expressed himself through his passionate words present in manifestos, proclamations, letters, and reports compiled by Isaacs himself in The Radical Revolution in
Tradição em língua portuguesa do «Livro de Isaac»
Directory of Open Access Journals (Sweden)
César Nardelli Cambraia
2011-10-01
Full Text Available Resumo: No presente trabalho examina-se a tradição em língua portuguesa do Livro de Isaac, preservada atualmente em quatro manuscritos medievais. Neste estudo, apresenta-se um estema representando a relação genética entre esses manuscritos, constituindo-se, assim, a base para a realização de uma edição crítica dessa obra.Palavras-chave: Crítica textual; estemática; língua portuguesa; Isaac de Ninive.Resumé: Dans le présent travail on examine la tradition en langue portugaise du Livro de Isaac, preservé actuellement en quatre manuscrits medievaux. Dans cette étude, on présente un stemma représentant la relation génétique entre ces manuscrits, en fixant, alors, la base pour la réalisation d´une édition critique de cette oeuvre.Mots-clés: Critique textuelle; stemmatique; langue portugaise; Isaac de Ninive.Keywords: Textual criticism; stemmatics; Portuguese; Isaac of Nineveh.
A combined modification of Newton`s method for systems of nonlinear equations
Energy Technology Data Exchange (ETDEWEB)
Monteiro, M.T.; Fernandes, E.M.G.P. [Universidade do Minho, Braga (Portugal)
1996-12-31
To improve the performance of Newton`s method for the solution of systems of nonlinear equations a modification to the Newton iteration is implemented. The modified step is taken as a linear combination of Newton step and steepest descent directions. In the paper we describe how the coefficients of the combination can be generated to make effective use of the two component steps. Numerical results that show the usefulness of the combined modification are presented.
Directory of Open Access Journals (Sweden)
Arturo Laguado
1983-06-01
Full Text Available 1867 marca una fecha de importancia para la literatura sudamericana; en este año Jorge Isaacs publica la "María". Poco queda por agregar sobre esta novela, leída y releída por varias generaciones, incansablemente analizada por los críticos más autorizados de la literatura universal, pero existen ciertos aspectos anecdóticos, que pueden ayudarnos a conocer mejor las circunstancias que rodearon el nacimiento de la obra.
Directory of Open Access Journals (Sweden)
Fábio Marineli
2014-01-01
Full Text Available This paper aimed to analyze the argumentative structure and the characteristics of arguments used in Isaac Newton’s paper where his “New theory about light and colors”, written in 1672, is described. For this purpose, we have used “Toulmin’s Argument Pattern” as an analytical tool. The identification of argumentative structure in a scientific text can help one to understand the argument construction in science and support this reasoning on science education, particularly on textbooks organization. This analysis has characterized the arguments presented in the text and shown its relation to Newton’s explanation on color in light refraction phenomenon through a prism.
Isaac Newton and Student College Completion
Tinto, Vincent
2013-01-01
Success in college is built upon classroom success, but success in the classroom does not in itself ensure college completion. Completion arises from success in a sequence of classes one after another over time. It does so most frequently when students are presented with coherent course pathways to degree completion, are able to gain degree credit…
Integrated Solar-Panel Antenna Array for CubeSats (ISAAC)
National Aeronautics and Space Administration — This project will develop a new subsystem technology for CubeSats. Integrated Solar-Panel Antenna Array for CubeSats (ISAAC) is an efficient, compact, high gain, low...
Kaks Mari Vaalas / Eha Komissarov
Komissarov, Eha, 1947-
1999-01-01
9. nov.-st galeriis 'Vaal' Mari Roosvaldi maalinäitus 'Persoon'; 10. nov.-st galerii keldrisaalis Mari Kurismaa 'Matemaatika ja metafüüsika'. Mari Roosvaldi kollaazhides on ühendatud maal ja foto.
10th International ISAAC Congress
Rodino, Luigi
2016-01-01
This book collects lectures given by the plenary speakers at the 10th International ISAAC Congress, held in Macau, China in 2015. The contributions, authored by eminent specialists, present some of the most exciting recent developments in mathematical analysis, probability theory, and related applications. Topics include: partial differential equations in mathematical physics, Fourier analysis, probability and Brownian motion, numerical analysis, and reproducing kernels. The volume also presents a lecture on the visual exploration of complex functions using the domain coloring technique. Thanks to the accessible style used, readers only need a basic command of calculus.
Restless Gentleman: Jorge Isaacs in Nineteenth-Century Colombia
Directory of Open Access Journals (Sweden)
Marco Palacios
2012-10-01
Full Text Available María (1867 is one of the most widely read Spanish-American novels of all times; this work compares it to the ups and downs in its author's life. Jorge Isaacs had been rich and fallen on hard times; had been a conservative Catholic and turned into an anti-clerical liberal; had been a merchant and rose up in arms; later he was exiled from his native province. The parable of his life deserves an explanation and this paper offers two clues: Isaacs' ineptitude for business and the high price he had to pay for changing his political-ideological sign into one that ten years later opposed the political regime of La Regeneración (1878-1900. Ironically, a later conservative regime (1900-1930 crafted the literary canonization of María, a nostalgic and sentimental novel, and established it as a national model of immutable private morality.
Lojasiewicz exponents and Newton polyhedra
International Nuclear Information System (INIS)
Pham Tien Son
2006-07-01
In this paper we obtain the exact value of the Lojasiewicz exponent at the origin of analytic map germs on K n (K = R or C under the Newton non-degeneracy condition, using information from their Newton polyhedra. We also give some conclusions on Newton non-degenerate analytic map germs. As a consequence, we obtain a link between Newton non-degenerate ideals and their integral closures, thus leading to a simple proof of a result of Saia. Similar results are also considered to polynomial maps which are Newton non-degenerate at infinity. (author)
Indian Academy of Sciences (India)
Solution to 'On an Intriguing Limit Problem'. S C Duffa Roy. Solution to 'How Many Couples will Survive?' Soubhik Chakraborty. BOOK REVIEWS. 60 Not a Plaster Saint. Bimon Noth. REFLECTIONS. 63 Newton's Principia. D Speiser. Front Cover. Title page of Newton's Principia. Back Cover. Isaac Newton. (1642/43 - 17271.
Directory of Open Access Journals (Sweden)
Julian Chaur González
2017-12-01
Full Text Available El trabajo desarrollado consiste en la formalización y comprobación ante hipótesis de carga de una bóveda axilsimétrica no construida. Esta bóveda es un proyecto utópico del arquitecto Louis Etienne Boullée, arquitecto francés con un volumen de obra muy significativo de carácter casi "surrealista". La obra de este autor alcanza normalmente unas proporciones titánicas y carentes de ornamento, basando sus formas principalmente en volúmenes geométricos sencillos. El proyecto que nos atañe será el cenotafio de Isaac Newton, una gigantesca bóveda axil simétrica con un espesor muy reducido en algunos puntos. Con el uso del programa de cálculo Maple, un programa de ánalisis matemático combinado con la tecnología CAD/CAM basada en los dibujos existentes de este proyecto comprobaremos la estabilidad geométrica y estructural de esta bóveda de proporciones titánicas. Con esto mostraremos las posibilidades de aplicación de los programas de cálculo geométrico a los modelos estructurales históricos y teóricos, como una herramienta mucho más visible y didáctica que los cálculos numéricos al uso. La visualización de los esfuerzos que resultan en las diferentes dovelas de la bóveda, conjuntamente con la comprensión y constatación del funcionamiento axil simétrico del modelo será determinante a la hora de comprender el funcionamiento de este sistema estructural y resolverá la duda que nos atañe. ¿Se podría construir el cenotafio de Newton? ¿Es una construcción estable geométrica y materialmente? Abstract The work developed in this paper consists in the formalization and verification of the load hypothesis of a non-constructed axilsymmetric vault. This vault is a utopian project by the architect Louis Etienne Boullée, French architect with a very significant volume of work of "surrealist" character. The works topic of this author usually resembles itself in buildings of titanic proportions and devoid of ornament, that
Indian Academy of Sciences (India)
Home; Journals; Resonance – Journal of Science Education. Mary M Mader. Articles written in Resonance – Journal of Science Education. Volume 2 Issue 1 January 1997 pp 53-59 General Article. Fostering Creativity in Students A Short Synthesis Project for the Organic Chemistry Laboratory · Mary M Mader Charles A ...
Asthma prevalence among high school students in East Jakarta, 2001, based on ISAAC questionnaire
Directory of Open Access Journals (Sweden)
Faisal Yunus
2003-09-01
Full Text Available The aim of this study was to assess asthma prevalence in children between 13-14 years of age in East Jakarta. This study is a cross sectional study which surveyed 2234 high school students between the ages of 13 and 14 years in East Jakarta in 2001 using the ISAAC questionnaire. Bronchial challenge test was applied by using methacholine substance to 186 students. Reports based on the ISAAC questionnaire indicate that 7.2% of teenage have had wheezing experience, 4.1% have wheezing within the last 12 months, 1.8% have ever suffered severe asthma attack within the last 12 months, 3.3% have suffered wheezing after exercise, and 6.3% have got night cough while they were not suffering from cold. Prevalence of atopy diseases such as rhinitis and eczema were 14.2% and 3.9%, meanwhile rhinitis and eczema prevalence within the last 12 months according to this study were 10.6% and 2.9% respectively. Statistically, there is a significant correlation between wheezing symptom and atopy (p < 0.05. From indepth questionnaire, a significant value of kappa 0.84 related with wheezing within the last 12 months was found. Bronchial challenge test results indicate that sensitivity was 90%, specificity 83.58%, positive predictive value 68.12% and negative predictive value was 95.73%. Asthma prevalence in East Jakarta at 2001 based on ISAAC questionnaire was 8.9%, and cumulative prevalence 11.5%. The ISAAC questionnaire can be used to study asthma prevalence in children at multicenter in Indonesia. (Med J Indones 2003; 12: 178-86Keywords: bronchial challenge, high school student, ISAAC questionnaire, East Jakarta, asthma prevalence
Science and Society: The Case of Acceptance of Newtonian Optics in the Eighteenth Century
Silva, Cibelle Celestino; Moura, Breno Arsioli
2012-01-01
The present paper presents a historical study on the acceptance of Newton's corpuscular theory of light in the early eighteenth century. Isaac Newton first published his famous book "Opticks" in 1704. After its publication, it became quite popular and was an almost mandatory presence in cultural life of Enlightenment societies. However, Newton's…
The history of the priority di∫pute between Newton and Leibniz mathematics in history and culture
Sonar, Thomas
2018-01-01
This book provides a thrilling history of the famous priority dispute between Gottfried Wilhelm Leibniz and Isaac Newton, presenting the episode for the first time in the context of cultural history. It introduces readers to the background of the dispute, details its escalation, and discusses the aftermath of the big divide, which extended well into recent times. One of the unique features of the book is that the mathematics behind the story is very intelligibly explained – an approach that offers general readers interested in the history of sciences and mathematics a window into the world of these two giants in their field. From the epilogue to the German edition by Eberhard Knobloch: Thomas Sonar has traced the emergence and the escalation of this conflict, which was heightened by Leibniz’s rejection of Newton’s gravitation theory, in a grandiose, excitingly written monograph. With absolute competence, he also explains the mathematical context so that non-mathematicians will also profit from the book....
Gilbert, Robert; Wen, Guo-Chun
1999-01-01
This volume of the Proceedings of the congress ISAAC '97 collects the contributions of the four sections 1. Function theoretic and functional analytic methods for pde, 2. Applications of function theory of several complex variables to pde, 3. Integral equations and boundary value problems, 4. Partial differential equations. Most but not all of the authors have participated in the congress. Unfortunately some from Eastern Europe and Asia have not managed to come because of lack of financial support. Nevertheless their manuscripts of the proposed talks are included in this volume. The majority of the papers deal with complex methods. Among them boundary value problems in particular the Riemann-Hilbert, the Riemann (Hilbert) and related problems are treated. Boundary behaviour of vector-valued functions are studied too. The Riemann-Hilbert problem is solved for elliptic complex equations, for mixed complex equations, and for several complex variables. It is considered in a general topological setting for mapping...
Sometimes "Newton's Method" Always "Cycles"
Latulippe, Joe; Switkes, Jennifer
2012-01-01
Are there functions for which Newton's method cycles for all non-trivial initial guesses? We construct and solve a differential equation whose solution is a real-valued function that two-cycles under Newton iteration. Higher-order cycles of Newton's method iterates are explored in the complex plane using complex powers of "x." We find a class of…
‘Speaking Kleinian’: Susan Isaacs as Ursula Wise and the Inter-War Popularisation of Psychoanalysis
Shapira, Michal
2017-01-01
How did the complex concepts of psychoanalysis become popular in early twentieth-century Britain? This article examines the contribution of educator and psychoanalyst Susan Isaacs (1885–1948) to this process, as well as her role as a female expert in the intellectual and medical history of this period. Isaacs was one of the most influential British psychologists of the inter-war era, yet historical research on her work is still limited. The article focuses on her writing as ‘Ursula Wise’, answering the questions of parents and nursery nurses in the popular journal Nursery World, from 1929 to 1936. Researched in depth for the first time, Isaacs’ important magazine columns reveal that her writing was instrumental in disseminating the work of psychoanalyst Melanie Klein in Britain. Moreover, Isaacs’ powerful rebuttals to behaviourist, disciplinarian parenting methods helped shift the focus of caregivers to the child’s perspective, encouraging them to acknowledge children as independent subjects and future democratic citizens. Like other early psychoanalysts, Isaacs was not an elitist; she was in fact committed to disseminating her ideas as broadly as possible. Isaacs taught British parents and child caregivers to ‘speak Kleinian’, translating Klein’s intellectual ideas into ordinary language and thus enabling their swift integration into popular discourse. PMID:28901872
Black Hole Results from XMM-Newton
Directory of Open Access Journals (Sweden)
Norbert Schartel
2014-12-01
Full Text Available XMM-Newton is one of the most successful science missions of the European Space Agency. Since 2003 every year about 300 articles are published in refereed journals making directly use of XMM-Newton data. All XMM-Newton calls for observing proposals are highly oversubscribed by factors of six and more. In the following some scientic highlights of XMM-Newton observations of black holes are summarized.
Newton-Cartan gravity revisited
Andringa, Roel
2016-01-01
In this research Newton's old theory of gravity is rederived using an algebraic approach known as the gauging procedure. The resulting theory is Newton's theory in the mathematical language of Einstein's General Relativity theory, in which gravity is spacetime curvature. The gauging procedure sheds
Some Peculiarities of Newton-Hooke Space-Times
Tian, Yu
2011-01-01
Newton-Hooke space-times are the non-relativistic limit of (anti-)de Sitter space-times. We investigate some peculiar facts about the Newton-Hooke space-times, among which the "extraordinary Newton-Hooke quantum mechanics" and the "anomalous Newton-Hooke space-times" are discussed in detail. Analysis on the Lagrangian/action formalism is performed in the discussion of the Newton-Hooke quantum mechanics, where the path integral point of view plays an important role, and the physically measurab...
Isaacs' syndrome in a patient with dermatomyositis: case report and review of the literature.
Lertnawapan, Ratchaya; Kulkantrakorn, Kongkiat
2017-08-01
This is a case report of Isaacs' syndrome in dermatomyositis. The patient presented with proximal muscle weakness, rash, elevated muscle enzyme, myopathic electromyograph and typical muscle biopsy. Ultimately he developed typical symptoms of Isaacs' syndrome which is an autoimmune channelopathy from voltage gated potassium channel antibody (anti-VGKC) leading to dysfunction of axonal discharge at neuromuscular junctions. It shares some similar characteristics with dermatomyositis such as autoimmunity, its association with malignancy and the response to treatment. © 2016 Asia Pacific League of Associations for Rheumatology and John Wiley & Sons Australia, Ltd.
Marie Curie: Physicist and Woman
Howes, Ruth
Marie Sklodowska was born in Warsaw on November 7, 1867. Girls were not allowed to attend college in Poland, so Marie found a well-paying post as a governess in rural village which she held for three years while helping her older sister complete medical school in Paris. Then Marie moved to Paris and graduated first in her class at the Sorbonne with a master's degree in physics in 1893. In 1895, she married the talented young physicist, Pierre Curie. Marie decided to investigate the radioactive components of the mineral pitchblende for her dissertation. The work involved chemical analysis of a ton of material in an unheated shed. Pierre joined her and at the end of 1898, the Curies announced the discovery of radium and polonium. Through 1899, Marie labored to measure the atomic weight of radium. In 1903, Marie earned her doctorate, the first for a woman in France, and the Curies split the Nobel Prize in Physics with Henri Becquerel. They became widely known, besieged by the press and frequently invited to make presentations and be awarded honors. They hated fame and both suffered bad health. In April, 1906, Pierre Curie was struck by a wagon and killed instantly. Marie was left as a single mother with two young daughters. Fortunately, the Sorbonne hired her to fill Pierre's position. In 1911, she was rejected for membership in the French Academy of Science because she was a woman. Also in 1911, she was accused of having an affair with a married French physicist Paul Langevin. The resulting scandal hit the press and brought angry mobs to her home. In the middle of this hullaballoo, she was informed that she had won a second Nobel Prize, this time in Chemistry. When World War I broke out, Marie mounted x-ray units on cars and became a heroine. She visited the United States in 1921 where President Harding presented her with a gram of radium. She continued her scientific studies in spite of declining health until her death in 1934. Professor Emerita.
A POPULARIZAÇÃO NA CIÊNCIA: A ÓPTICA DE NEWTON NO SÉCULO XVIII
Directory of Open Access Journals (Sweden)
Boniek Silva Venceslau
2009-03-01
Full Text Available RESUMO As atuais aulas de ciências, geralmente, não apresentam discussões referentes à aspectos da natureza da ciência, por exemplo, como uma teoria se desenvolve com o tempo e a influência de fatores não-racionais na sua construção. Tais aspectos são relevantes na hora do aluno desenvolver uma visão mais adequada na sua compreensão de como uma teoria ou modelo é construído. Além disso, as abordagens mais tradicionais, também, já não garantem a aprendizagem de teorias físicas. Com a inserção de discussões, que envolvam a História e a Filosofia da Ciência (HFC, os alunos poderão vivenciar o desenvolvimentos de teorias físicas e, também, realizar estudos sobre a natureza da ciência, colocando em evidência aspectos não abordados nas práticas mais tradiconais. Este estudo é baseado em uma pesquisa bibliográfica, que contempla a história da óptica, e, em especial, a controvérsia existente em relação a natureza da luz com destaque a influência newtoniana para a aceitação da teoria corpuscular no século XVIII. Neste trabalho problematizaremos uma visão ingênua do desenvolvimento histórico da ciência, onde, geralmente, ela é vista de forma contínua e fatores não-racionais são excluídos da construção de teorias físicas. PALAVRAS-CHAVE: história e filosofia da ciência, popularização na ciência, Isaac Newton. THE POPULARIZATION IN SCIENCE: THE NEWTON APPROACH IN THE EIGHTEENTH CENTURY ABSTRACT The current science classes generally do not have discussions concerning aspects of the nature of science, for example, as a theory developed over time, the influence of non-rational factors in its construction. These aspects are relevant at the time of the student developing a more appropriate method in their understanding of how a theory or model is built. In addition to more traditional approaches, too, no longer guaranteeing the physical theories of learning. With the insertion of discussions, involving
NEWTON'S SECOND LAW OF MOTION, F=MA; EULER'S OR NEWTON'S?
Ajay Sharma
2017-01-01
Objective: F =ma is taught as Newton’s second law of motion all over the world. But it was given by Euler in 1775, forty-eight years after the death of Newton. It is debated here with scientific logic. Methods/Statistical analysis: The discussion partially deals with history of science so various aspects are quoted from original references. Newton did not give any equation in the Principia for second, third laws motion and law of gravitation. Conceptually, in Newton’s time, neither accele...
Mary and femininity: A psychological critique.
Harrington, P A
1984-09-01
This essay uses Freud to interpret the symbolism and theology of Mary in modern Catholicism. In her role as the mother of believers, Mary functions to place the Christian in the position of a child who receives illusory gratification from the mother. In her role as model for Christians to emulate, Mary functions to place the Christian in the position of receptivity and dependence which Freud associated with femininity. Reinterpreting Freud from a feminist perspective, I suggest that the kind of femininity Mary represents serves to perpetuate patriachal social structures and to inhibit full psychological maturity.
Truncated Newton-Raphson Methods for Quasicontinuum Simulations
National Research Council Canada - National Science Library
Liang, Yu; Kanapady, Ramdev; Chung, Peter W
2006-01-01
.... In this research, we report the effectiveness of the truncated Newton-Raphson method and quasi-Newton method with low-rank Hessian update strategy that are evaluated against the full Newton-Raphson...
Supernatural Themes in Selected Children's Stories of Isaac Bashevis Singer.
Schlessinger, June H.; Vanderryst, June D.
1989-01-01
Discusses the impact of the traditional folklore theme of good versus evil on children's development and analyzes the development of this theme using magical and supernatural situations in the work of Isaac Bashevis Singer. A selected bibliography of work by and literary criticisms of Singer's writings is provided. (five references) (CLB)
Turning around Newton's Second Law
Goff, John Eric
2004-01-01
Conceptual and quantitative difficulties surrounding Newton's second law often arise among introductory physics students. Simply turning around how one expresses Newton's second law may assist students in their understanding of a deceptively simple-looking equation.
NITSOL: A Newton iterative solver for nonlinear systems
Energy Technology Data Exchange (ETDEWEB)
Pernice, M. [Univ. of Utah, Salt Lake City, UT (United States); Walker, H.F. [Utah State Univ., Logan, UT (United States)
1996-12-31
Newton iterative methods, also known as truncated Newton methods, are implementations of Newton`s method in which the linear systems that characterize Newton steps are solved approximately using iterative linear algebra methods. Here, we outline a well-developed Newton iterative algorithm together with a Fortran implementation called NITSOL. The basic algorithm is an inexact Newton method globalized by backtracking, in which each initial trial step is determined by applying an iterative linear solver until an inexact Newton criterion is satisfied. In the implementation, the user can specify inexact Newton criteria in several ways and select an iterative linear solver from among several popular {open_quotes}transpose-free{close_quotes} Krylov subspace methods. Jacobian-vector products used by the Krylov solver can be either evaluated analytically with a user-supplied routine or approximated using finite differences of function values. A flexible interface permits a wide variety of preconditioning strategies and allows the user to define a preconditioner and optionally update it periodically. We give details of these and other features and demonstrate the performance of the implementation on a representative set of test problems.
Canonical understanding of the sacrifice of Isaac: The influence of ...
African Journals Online (AJOL)
2016-07-08
Jul 8, 2016 ... Martyrdom has granted benefits to the people of ... Testament, as the authoritative text and understands the text primarily in the canonical context ... This is more significant in terms of ..... This image of the Father-Son relation recurs in the NT, ..... this passage is Abraham's obedience, not Isaac's self-sacrifice.
Huang, Chao-Guang; Guo, Han-Ying; Tian, Yu; Xu, Zhan; Zhou, Bin
2004-01-01
Based on the Beltrami-de Sitter spacetime, we present the Newton-Hooke model under the Newton-Hooke contraction of the $BdS$ spacetime with respect to the transformation group, algebra and geometry. It is shown that in Newton-Hooke space-time, there are inertial-type coordinate systems and inertial-type observers, which move along straight lines with uniform velocity. And they are invariant under the Newton-Hooke group. In order to determine uniquely the Newton-Hooke limit, we propose the Gal...
Marie Curie: scientific entrepreneur
International Nuclear Information System (INIS)
Boudia, S.
1998-01-01
Marie Curie is best known for her discovery of radium one hundred years ago this month, but she also worked closely with industry in developing methods to make and monitor radioactive material, as Soraya Boudia explains. One hundred years ago this month, on 28 December 1898, Pierre Curie, Marie Sklodowska-Curie and Gustave Bemont published a paper in Comptes-rendus - the journal of the French Academy of Sciences. In the paper they announced that they had discovered a new element with astonishing properties: radium. But for one of the authors, Marie Curie, the paper was more than just the result of outstanding work: it showed that a woman could succeed in what was then very much a male-dominated scientific world. Having arrived in Paris from Poland in 1891, Marie Curie became the first woman in France to obtain a PhD in physics, the first woman to win a Nobel prize and the first woman to teach at the Sorbonne. She also helped to found a new scientific discipline: the study of radioactivity. She became an icon and a role-model for other women to follow, someone who succeeded - despite many difficulties - in imposing herself on the world of science. Although Curie's life story is a familiar and well documented one, there is one side to her that is less well known: her interaction with industry. As well as training many nuclear physicists and radiochemists in her laboratory, she also became a scientific pioneer in industrial collaboration. In this article the author describes this side of Marie Curie. (UK)
National Research Council Canada - National Science Library
Dupuis, Paul; Wang, Hui
2005-01-01
Previous papers by authors establish the connection between importance sampling algorithms for estimating rare-event probabilities, two-person zero-sum differential games, and the associated Isaacs equation...
2007-01-01
Jean-Marie Dufour, who was head of the CERN Legal Service from 1974 until his retirement in 2001, passed away on 8 July. Following his arrival at CERN in 1966 during the crucial phase of expansion of the Laboratory’s site, Jean-Marie Dufour ensured that CERN’s rules were applied while taking part in essential stages of the Organization’s development. With his fine mind and erudition, Jean-Marie Dufour, a staunch European devoted to the CERN cause, has left his mark on the Legal Service. The Service will publish a tribute to him in a forthcoming issue of the Bulletin.
Robotic Software Integration Using MARIE
Directory of Open Access Journals (Sweden)
Carle Côté
2006-03-01
Full Text Available This paper presents MARIE, a middleware framework oriented towards developing and integrating new and existing software for robotic systems. By using a generic communication framework, MARIE aims to create a flexible distributed component system that allows robotics developers to share software programs and algorithms, and design prototypes rapidly based on their own integration needs. The use of MARIE is illustrated with the design of a socially interactive autonomous mobile robot platform capable of map building, localization, navigation, tasks scheduling, sound source localization, tracking and separation, speech recognition and generation, visual tracking, message reading and graphical interaction using a touch screen interface.
Intermittent Solar Ammonia Absorption Cycle (ISAAC) refrigeration for lesser developed countries
Erickson, Donald C.
1990-02-01
The Intermittent Solar Ammonia Absorption Cycle (ISAAC) refrigerator is a solar thermal technology which provides low cost, efficient, reliable ice-making to areas without ready access to electricity. An ISAAC refrigeration system consists of a compound parabolic solar collector, two pressure vessels, a condenser, a cold box or refrigerated space, and simple connective piping -- no moving parts or electrical components. Most parts are simple construction or plumbing grade materials, locally available in many remote areas. This technology has numerous potential benefits in lesser developed countries both by providing a cheap, reliable source of ice, and, since manufacture requires only semi-skilled labor, a source of employment to the local economy. Applications include vaccine storage for health care clinics; fish, meat, and dairy product storage; and personal consumption. Importantly, this technology increases the quality of life for people in lesser developed countries without depleting fossil fuel resources or increasing the release of greenhouse gases such as CO2 and chlorofluorocarbons.
Prevalence of asthma in Latin America. Critical look at ISAAC and other studies
Directory of Open Access Journals (Sweden)
Jaime Ocampo
2017-06-01
Full Text Available Currently, the ISAAC (International Study of Asthma and Allergies in Childhood project is a global approach to assess the prevalence of asthma and other allergies in different latitudes. One of the great advantages of this project is that it compares using the same methodology, the prevalence of asthma in more than 50 cities during the same period of time, nevertheless the reproducibility of these results when compared with other studies of prevalence in each region has not been evaluated. In this review we aim to compare the epidemiological data provided by the ISAAC against the data identified in some regional cohort studies and by means of a critical evaluation to highlight the main similarities and to analyze the differences between these epidemiological data.
Indian Academy of Sciences (India)
Our slightly extended article-in-a-box and back cover portrait this time celebrate the great universalist and intellectual giant. Gottfried Wilhelm Leibniz, who was a contemporary of Isaac. Newton. The two of them independently invented the differen- tial calculus - called by Newton the "method of fluxions" - and this led to one ...
Newton flows for elliptic functions
Helminck, G.F.; Twilt, F.
2015-01-01
Newton flows are dynamical systems generated by a continuous, desingularized Newton method for mappings from a Euclidean space to itself. We focus on the special case of meromorphic functions on the complex plane. Inspired by the analogy between the rational (complex) and the elliptic (i.e., doubly
Mary Shelley: Teaching and Learning through "Frankenstein"
Girard, Theresa M.
2009-01-01
In the writing of "Frankenstein", Mary Shelley was able to change the course of women's learning, forever. Her life started from an elite standpoint as the child of Mary Wollstonecraft and William Godwin. As such, she was destined to grow to be a major influence in the world. Mary Shelley's formative years were spent with her father and his many…
"Mary Hartman, Mary Hartman": An Analysis of Satire as a Violation of Soap Opera Stereotypes.
Gaulard, Joan M.
The soap opera "Mary Hartman, Mary Hartman" presents an interesting new genre in television, as it defies the conventional standards and stereotypes associated with daytime drama. The central character is not a dependent victim but a survivor who indicates to her viewers the concept which advertisers and media management have of them. A…
"Mary Hartman, Mary Hartman"; A New Genre of Prosocial Programming, or Just Another Soap Opera?
Surlin, Stuart H.; Maloof, Mary C.
This paper discusses the wide appeal, and the effect on the viewing audience, of traditional television soap operas. It reports on a comparison of role interactions, topics discussed by the characters, and types of topics and problems presented on the television program "Mary Hartman, Mary Hartman" with those presented on two traditional…
Sauerheber, Richard D.
2012-01-01
Methods of teaching the Calculus are presented in honour of Sir Isaac Newton, by discussing an extension of his original proofs and discoveries. The methods, requested by Newton to be used that reflect the historical sequence of the discovered Fundamental Theorems, allow first-time students to grasp quickly the basics of the Calculus from its…
Subsampled Hessian Newton Methods for Supervised Learning.
Wang, Chien-Chih; Huang, Chun-Heng; Lin, Chih-Jen
2015-08-01
Newton methods can be applied in many supervised learning approaches. However, for large-scale data, the use of the whole Hessian matrix can be time-consuming. Recently, subsampled Newton methods have been proposed to reduce the computational time by using only a subset of data for calculating an approximation of the Hessian matrix. Unfortunately, we find that in some situations, the running speed is worse than the standard Newton method because cheaper but less accurate search directions are used. In this work, we propose some novel techniques to improve the existing subsampled Hessian Newton method. The main idea is to solve a two-dimensional subproblem per iteration to adjust the search direction to better minimize the second-order approximation of the function value. We prove the theoretical convergence of the proposed method. Experiments on logistic regression, linear SVM, maximum entropy, and deep networks indicate that our techniques significantly reduce the running time of the subsampled Hessian Newton method. The resulting algorithm becomes a compelling alternative to the standard Newton method for large-scale data classification.
Marie and Pierre Curie. Life in extremes; Marie and Pierre Curie. Leben in Extremen
Energy Technology Data Exchange (ETDEWEB)
Roethlein, Brigitte
2008-07-01
In Paris in 1894, two young physicists fall in love: Marie Sklodowska and Pierre Curie. They get married and make great contributions to science, research radioactivity and discover new chemical elements. The marriage of Marie and Pierre Curie is quite modern: They work together as equals, share their thoughts and pursue their plans together as partners. They share an absolute interest in science, a love of nature, and a sceptic attitude towards the sophisticated society of the Belle Epoque. They are together 24 hours a day with hardly ever any disagreement. Whenever one of them is ill - which is quite often because of the high level of radioactivity in their laboratory -, the other will nurse him or her. After only twelve years of mutual love, Pierre Curie dies. Marie raises their two daughters on her own and continues her research. In 1911, she will be the first scientist that ever gets a second Nobel Prize. (orig.) [German] Im Paris des Jahres 1894 verlieben sich zwei junge Physiker: Marie Sklodowska und Pierre Curie. Sie heiraten und leisten gemeinsam Grosses fuer die Wissenschaft, erforschen die Radioaktivitaet und entdecken neue chemische Elemente. Zusammen erhalten sie den Nobelpreis. Marie und Pierre Curie fuehren eine Ehe, die ihrer Zeit weit voraus ist: Sie arbeiten gleichberechtigt miteinander, teilen ihre Gedanken und verfolgen ihre Plaene gemeinsam. Beiden eigen ist die absolute wissenschaftliche Neugier, die Liebe zur Natur und die Skepsis gegenueber der mondaenen Gesellschaft der Belle Epoque. Fast jeden Tag sind sie rund um die Uhr zusammen, dabei gibt es selten Spannungen. Wenn einer von beiden gesundheitliche Probleme hat - und das haben sie wegen der radioaktiven Belastung im Labor oft - ist der andere fuer ihn da und pflegt ihn. Nach nur zwoelf gemeinsamen Jahren der Liebe und Arbeit stirbt Pierre Curie. Marie zieht ihre beiden Toechter alleine gross und fuehrt die Forschungen weiter. 1911 erhaelt sie als erster Mensch zum zweiten Mal den
Hurricane Isaac: observations and analysis of coastal change
Guy, Kristy K.; Stockdon, Hilary F.; Plant, Nathaniel G.; Doran, Kara S.; Morgan, Karen L.M.
2013-01-01
Understanding storm-induced coastal change and forecasting these changes require knowledge of the physical processes associated with a storm and the geomorphology of the impacted coastline. The primary physical process of interest is sediment transport that is driven by waves, currents, and storm surge associated with storms. Storm surge, which is the rise in water level due to the wind, barometric pressure, and other factors, allows both waves and currents to impact parts of the coast not normally exposed to these processes. Coastal geomorphology reflects the coastal changes associated with extreme-storm processes. Relevant geomorphic variables that are observable before and after storms include sand dune elevation, beach width, shoreline position, sediment grain size, and foreshore beach slope. These variables, in addition to hydrodynamic processes, can be used to quantify coastal change and are used to predict coastal vulnerability to storms (Stockdon and others, 2007). The U.S. Geological Survey (USGS) National Assessment of Coastal Change Hazards (NACCH) project (http://coastal.er.usgs.gov/national-assessment/) provides hazard information to those concerned about the Nation’s coastlines, including residents of coastal areas, government agencies responsible for coastal management, and coastal researchers. Extreme-storm research is a component of the NACCH project (http://coastal.er.usgs.gov/hurricanes/) that includes development of predictive understanding, vulnerability assessments using models, and updated observations in response to specific storm events. In particular, observations were made to determine morphological changes associated with Hurricane Isaac, which made landfall in the United States first at Southwest Pass, at the mouth of the Mississippi River, at 0000 August 29, 2012 UTC (Coordinated Universal Time) and again, 8 hours later, west of Port Fourchon, Louisiana (Berg, 2013). Methods of observation included oblique aerial photography
National Research Council Canada - National Science Library
Dupuis, Paul; Wang, Hui
2005-01-01
It has been established that importance sampling algorithms for estimating rare-event probabilities are intimately connected with two-person zero-sum differential games and the associated Isaacs equation...
Newton's Cradle in Physics Education
Gauld, Colin F.
2006-01-01
Newton's Cradle is a series of bifilar pendulums used in physics classrooms to demonstrate the role of the principles of conservation of momentum and kinetic energy in elastic collisions. The paper reviews the way in which textbooks use Newton's Cradle and points out the unsatisfactory nature of these treatments in almost all cases. The literature…
Leadership among people who use AAC: ISAAC's Project LEAD
CSIR Research Space (South Africa)
Bryen, DN
2008-08-01
Full Text Available stream_source_info Bryen_2008.pdf.txt stream_content_type text/plain stream_size 23272 Content-Encoding UTF-8 stream_name Bryen_2008.pdf.txt Content-Type text/plain; charset=UTF-8 Leadership in ISAAC: Leading the Way... Diane Nelson Bryen, USA Sarah Lever, USA Sayomdeb Mujherjee, India Martin Pistorius, South Africa Melinda Smith, Australia Leading the Way � square6 Powerful conference title square6 Important call for leadership development Across the Globe...
Low-rank Quasi-Newton updates for Robust Jacobian lagging in Newton methods
International Nuclear Information System (INIS)
Brown, J.; Brune, P.
2013-01-01
Newton-Krylov methods are standard tools for solving nonlinear problems. A common approach is to 'lag' the Jacobian when assembly or preconditioner setup is computationally expensive, in exchange for some degradation in the convergence rate and robustness. We show that this degradation may be partially mitigated by using the lagged Jacobian as an initial operator in a quasi-Newton method, which applies unassembled low-rank updates to the Jacobian until the next full reassembly. We demonstrate the effectiveness of this technique on problems in glaciology and elasticity. (authors)
Newton flows for elliptic functions: A pilot study
Twilt, F.; Helminck, G.F.; Snuverink, M.; van den Brug, L.
2008-01-01
Elliptic Newton flows are generated by a continuous, desingularized Newton method for doubly periodic meromorphic functions on the complex plane. In the special case, where the functions underlying these elliptic Newton flows are of second-order, we introduce various, closely related, concepts of
Teorías de la luz y el color en la época de las Luces. De Newton a Goethe
Directory of Open Access Journals (Sweden)
Pimentel, Juan
2015-10-01
Full Text Available This article opens with a review of Isaac Newton’s theory of light, focusing on the controversial character of his crucial experiment. It then proceeds to examine certain aspects of his legacy in a century that was perhaps more Newtonian than his own optics. We analyse some of the metaphors connected with light and the symbolic role of light as the metaphor for knowledge. The article concludes with Goethe’s colour theory, his challenge to Newtonian theory, and his reinstatement of human beings and the history of science in order to achieve a better understanding not only of light, the eye and chromatic phenomena, but also of scientific activity as a whole.En este artículo comenzamos por revisar la teoría de la luz de Isaac Newton, centrándonos en el carácter controvertido del experimento crucial. Después nos detenemos en algunos aspectos de su legado en un siglo quizás más newtoniano que su propia óptica, analizando algunas metáforas bajo las que fue entendida la luz, así como el papel simbólico de la luz, metáfora del conocimiento por excelencia. Finalmente repasamos la teoría de los colores de Goethe, su impugnación de la óptica newtoniana y su empeño en recuperar al ser humano y la historia de la ciencia para entender mejor no sólo qué son la luz, el ojo o los fenómenos cromáticos, sino la actividad científica en su conjunto.
Improvement of core degradation model in ISAAC
International Nuclear Information System (INIS)
Kim, Dong Ha; Kim, See Darl; Park, Soo Yong
2004-02-01
If water inventory in the fuel channels depletes and fuel rods are exposed to steam after uncover in the pressure tube, the decay heat generated from fuel rods is transferred to the pressure tube and to the calandria tube by radiation, and finally to the moderator in the calandria tank by conduction. During this process, the cladding will be heated first and ballooned when the fuel gap internal pressure exceeds the primary system pressure. The pressure tube will be also ballooned and will touch the calandria tube, increasing heat transfer rate to the moderator. Although these situation is not desirable, the fuel channel is expected to maintain its integrity as long as the calandria tube is submerged in the moderator, because the decay heat could be removed to the moderator through radiation and conduction. Therefore, loss of coolant and moderator inside and outside the channel may cause severe core damage including horizontal fuel channel sagging and finally loss of channel integrity. The sagged channels contact with the channels located below and lose their heat transfer area to the moderator. As the accident goes further, the disintegrated fuel channels will be heated up and relocated onto the bottom of the calandria tank. If the temperature of these relocated materials is high enough to attack the calandria tank, the calandria tank would fail and molten material would contact with the calandria vault water. Steam explosion and/or rapid steam generation from this interaction may threaten containment integrity. Though a detailed model is required to simulate the severe accident at CANDU plants, complexity of phenomena itself and inner structures as well as lack of experimental data forces to choose a simple but reasonable model as the first step. ISAAC 1.0 was developed to model the basic physicochemical phenomena during the severe accident progression. At present, ISAAC 2.0 is being developed for accident management guide development and strategy evaluation. In
Energy Technology Data Exchange (ETDEWEB)
Trotereau, J.
2011-07-01
The legend has only retained from Marie Curie (1867-1934) the image of a hard and brilliant worker, pioneer in the radioactivity domain, and who awarded twice the Nobel Price. Behind the scientist, there is a women, Marya Salomea Sklodowska, the 'Polish', who was considered during some time as an 'alien', an 'atheistic intellectual', an 'emancipated women'. When she died alone in July 1934, after an exhausting life of labour, her funeral led to no official ceremony or speech. This small book summarizes the biography of the most famous female scientist in the world
Marie Underile pühendatakse konverents
2008-01-01
Tartus Eesti Kirjandusmuuseumis toimuvast Marie Underi 125. sünniaastapäevale pühendatud konverentsist ja näitusest "Kunsti Marie Underi kodust". Vt. ka Keel ja Kirjandus, nr. 4, 2008, lk. 317; Looming, nr. 4, 2008, lk. 635; Keel ja Kirjandus, nr. 7, lk. 570-572
Never at rest: a biography of Isaac Newton
National Research Council Canada - National Science Library
Westfall, Richard S
1980-01-01
... Paulo, Delhi, Dubai, Tokyo, Mexico City Cambridge University Press 32 Avenue of the Americas, New York, NY 10013-2473, © Cambridge University Press 1980 USA www.cambridge.org Information on this title: www.cambridge.org/9780521231435 This publication is in copyright. Subject to statutory exception and to the provisions of relevant...
Mary Shelley as editor of Percy Shelley
Allen, Richard
2001-01-01
This chapter explores Mary Shelley's work as the founding editor of Percy Shelley's poetry. It sets out the circumstances of Mary Shelley's life after the death of Percy Shelley, her financial dependence on Percy Shelley's father, and the restrictions placed on publication by Shelley's father. It then sets out the strategies Mary Shelley used to construct a biography of Percy Shelley from the poem, thus establishing a Romantic biography of Percy Shelley which has endured into the 20th century,
Mari e-raamatukogu / Tatjana Verina ; vene keelest tõlkinud Ene Riet
Verina, Tatjana
2011-01-01
Mari e-raamatukogu loomise aluseks on Mari-Eli Vabariigi etnokultuuriliste ja rahvusvaheliste suhete arendamise projekt, hetkel on elektroonilises raamatukogus 52 täistekstilist teavikut Tšavaini nimelise Mari Rahvusraamatukogu haruldaste raamatute kogust
International Nuclear Information System (INIS)
Song, Y.M.; Kim, D.H.; Nijhawan, Sunil
2015-01-01
Amongst the applications of integrated severe accident analysis codes like ISAAC, the principal are to a) help develop an understanding of the severe accident progression and its consequences; b) support the design of mitigation measures by providing for them the state of the reactor following an accident; and c) to provide a training platform for accident management actions. After Fukushima accident there is an increased awareness of the need to implement effective and appropriate mitigation measures and empower the operators with training and understanding about severe accident progression and control opportunities. An updated code with reduced uncertainties can better serve these needs of the utility making decisions about mitigation measures and corrective actions. Optimal deployment of systems such as PARS and filtered containment venting require information on reactor transients for a number of critical parameters. Thus there is a greater consensus now for a demonstrated ability to perform accident progression and consequence assessment analyses with reduced uncertainties. Analyses must now provide source term transients that represent the best in available understanding and so meaningfully support mitigation measures. This requires removal of known simplifications and inclusion of all quantifiable and risk significant phenomena. Advances in understanding of CANDU6 severe accident progression reflected in the severe accident integrated code ROSHNI are being incorporated into ISAAC using CANDU specific component and system models developed and verified for Wolsong CANDU 6 reactors. A significant and comprehensive upgrade of core behavior models is being implemented in ISAAC to properly reflect the large variability amongst fuel channels in feeder geometry, fuel thermal powers and burnup. The paper summarizes the models that have been added and provides some results to illustrate code capabilities. ISAAC is being updated to meet the current requirements and
Energy Technology Data Exchange (ETDEWEB)
Song, Y.M.; Kim, D.H. [KAERI, Daejeon (Korea, Republic of); Nijhawan, Sunil [Prolet Inc. 98 Burbank Drive, Toronto (Canada)
2015-05-15
Amongst the applications of integrated severe accident analysis codes like ISAAC, the principal are to a) help develop an understanding of the severe accident progression and its consequences; b) support the design of mitigation measures by providing for them the state of the reactor following an accident; and c) to provide a training platform for accident management actions. After Fukushima accident there is an increased awareness of the need to implement effective and appropriate mitigation measures and empower the operators with training and understanding about severe accident progression and control opportunities. An updated code with reduced uncertainties can better serve these needs of the utility making decisions about mitigation measures and corrective actions. Optimal deployment of systems such as PARS and filtered containment venting require information on reactor transients for a number of critical parameters. Thus there is a greater consensus now for a demonstrated ability to perform accident progression and consequence assessment analyses with reduced uncertainties. Analyses must now provide source term transients that represent the best in available understanding and so meaningfully support mitigation measures. This requires removal of known simplifications and inclusion of all quantifiable and risk significant phenomena. Advances in understanding of CANDU6 severe accident progression reflected in the severe accident integrated code ROSHNI are being incorporated into ISAAC using CANDU specific component and system models developed and verified for Wolsong CANDU 6 reactors. A significant and comprehensive upgrade of core behavior models is being implemented in ISAAC to properly reflect the large variability amongst fuel channels in feeder geometry, fuel thermal powers and burnup. The paper summarizes the models that have been added and provides some results to illustrate code capabilities. ISAAC is being updated to meet the current requirements and
Choosing the forcing terms in an inexact Newton method
Energy Technology Data Exchange (ETDEWEB)
Eisenstat, S.C. [Yale Univ., New Haven, CT (United States); Walker, H.F. [Utah State Univ., Logan, UT (United States)
1994-12-31
An inexact Newton method is a generalization of Newton`s method for solving F(x) = 0, F: {Re}{sup n} {r_arrow} {Re}{sup n}, in which each step reduces the norm of the local linear model of F. At the kth iteration, the norm reduction is usefully expressed by the inexact Newton condition where x{sub k} is the current approximate solution and s{sub k} is the step. In many applications, an {eta}{sub k} is first specified, and then an S{sub k} is found for which the inexact Newton condition holds. Thus {eta}{sub k} is often called a {open_quotes}forcing term{close_quotes}. In practice, the choice of the forcing terms is usually critical to the efficiency of the method and can affect robustness as well. Here, the authors outline several promising choices, discuss theoretical support for them, and compare their performance in a Newton iterative (truncated Newton) method applied to several large-scale problems.
Remembering Mary Tyler Moore | MedlinPlus Magazine
... Remembering Mary Tyler Moore Follow us NIH MedlinePlus Magazine Remembers Mary Tyler Moore A little more than ... helped launch the first issue of NIH MedlinePlus magazine on Capitol Hill. The award-winning actress and ...
77 FR 58900 - Mississippi Disaster #MS-00060
2012-09-24
... 09/11/2012. Incident: Hurricane Isaac. Incident Period: 08/26/2012 through 09/11/2012. DATES..., Newton, Pearl River, Perry, Pike, Smith, Stone, Walthall, Wayne, Wilkinson. The Interest Rates are...
Adaptation of Russian Christian Names into the Mari Language
Directory of Open Access Journals (Sweden)
Alexander L. Pustyakov
2017-11-01
Full Text Available This article analyses the phonetic and morphological adaptation of Christian personal names in the Mari language. The work examines personal names recorded in different regions among the Mari. The composition of the presented data is not exhaustive; it does, however, allow one to observe some general patterns of the adaptation process. The main part of the article is preceded by a brief overview of the Christianization of the Mari region and the contacts between the Mari and the Russian-speaking population; the features of the local dialects of the Russian language are briefly stated. The Mari language incorporated a significant number of Russian names. The source of loans included, besides the standard church name forms, also the numerous varieties found in the Russian dialects. As part of the study, phonetic, structural changes of Christian names in the Mari language are revealed and the reasons for the majority of these transformations are identified. The author also pays attention to the intermediary role of the neighbouring Turkic languages in the penetration of Russian names into the Mari language. Changes in borrowed names were induced by internal Mari linguistic rules, as well as dialectal features of the local Russian dialects. The identification of systematic phonetic and structural transformations helps to determine the origin of obscure anthroponyms.
Socrates Bardi, Jason
2010-01-01
In 1696 Isaac Newton made what seems like a bizarre career move. Abandoning Cambridge University and the mathematical pursuits that made him famous, the 53-year-old scientist upped sticks for London to become warden of the Royal Mint. Part administrator, part coining expert, and part criminal prosecutor, this new role would occupy Newton for the remaining three decades of his life.
Damonte, Kathleen
2004-01-01
One thing scientists study is how objects move. A famous scientist named Sir Isaac Newton (1642-1727) spent a lot of time observing objects in motion and came up with three laws that describe how things move. This explanation only deals with the first of his three laws of motion. Newton's First Law of Motion says that moving objects will continue…
Forces. Physical Science in Action[TM]. Schlessinger Science Library. [Videotape].
2000
Forces are all around. Without them, there would be no movement. In fact, Sir Isaac Newton theorized that a force called inertia actually works to keep things exactly as they are at any given moment! Students will learn about Newton's laws and about how forces affect many aspects of life. With clear demonstrations and a unique hands-on activity,…
Symposium on Recent Advances in Experimental Mechanics : in honor of Isaac M. Daniel
2002-01-01
This book contains 71 papers presented at the symposium on “Recent Advances in Experimental Mechanics” which was organized in honor of Professor Isaac M. Daniel. The symposium took place at Virginia Polytechnic Institute and State University on th June 23-28, 2002, in conjunction with the 14 US National Congress of Applied Mechanics. The book is a tribute to Isaac Daniel, a pioneer of experimental mechanics and composite materials, in recognition of his continuous, original, diversified and outstanding contributions for half a century. The book consists of invited papers written by leading experts in the field. It contains original contributions concerning the latest developments in experimental mechanics. It covers a wide range of subjects, including optical methods of stress analysis (photoelasticity, moiré, etc.), composite materials, sandwich construction, fracture mechanics, fatigue and damage, nondestructive evaluation, dynamic problems, fiber optic sensors, speckle metrology, digital image process...
Directory of Open Access Journals (Sweden)
Martina Kastnerová
2017-03-01
Full Text Available The study intends to clarify the process of forming of Sidneyan literary cult as a part of (Sidneyʼs family legacy based on the the literary activities of Sidneyʼs sister Lady Mary Sidney Herbert, countess of Pembroke, and his niece Lady Mary Wroth, daughter of his younger brother Robert. Mary Sidney Herbert throughout her literary career sings a swan song of her brother, Mary Wroth creates an imaginative world of free love choice and happy endings and her literary career is based on the well-established cult of Sidneyʼs name.
Newton-Cartan gravity and torsion
Bergshoeff, Eric; Chatzistavrakidis, Athanasios; Romano, Luca; Rosseel, Jan
2017-10-01
We compare the gauging of the Bargmann algebra, for the case of arbitrary torsion, with the result that one obtains from a null-reduction of General Relativity. Whereas the two procedures lead to the same result for Newton-Cartan geometry with arbitrary torsion, the null-reduction of the Einstein equations necessarily leads to Newton-Cartan gravity with zero torsion. We show, for three space-time dimensions, how Newton-Cartan gravity with arbitrary torsion can be obtained by starting from a Schrödinger field theory with dynamical exponent z = 2 for a complex compensating scalar and next coupling this field theory to a z = 2 Schrödinger geometry with arbitrary torsion. The latter theory can be obtained from either a gauging of the Schrödinger algebra, for arbitrary torsion, or from a null-reduction of conformal gravity.
On Newton-Cartan trace anomalies
International Nuclear Information System (INIS)
Auzzi, Roberto; Baiguera, Stefano; Nardelli, Giuseppe
2016-01-01
We classify the trace anomaly for parity-invariant non-relativistic Schrödinger theories in 2+1 dimensions coupled to background Newton-Cartan gravity. The general anomaly structure looks very different from the one in the z=2 Lifshitz theories. The type A content of the anomaly is remarkably identical to that of the relativistic 3+1 dimensional case, suggesting the conjecture that an a-theorem should exist also in the Newton-Cartan context.
On Newton-Cartan trace anomalies
Energy Technology Data Exchange (ETDEWEB)
Auzzi, Roberto [Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore,Via Musei 41, 25121 Brescia (Italy); INFN Sezione di Perugia,Via A. Pascoli, 06123 Perugia (Italy); Baiguera, Stefano [Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore,Via Musei 41, 25121 Brescia (Italy); Nardelli, Giuseppe [Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore,Via Musei 41, 25121 Brescia (Italy); TIFPA - INFN, c/o Dipartimento di Fisica, Università di Trento,38123 Povo (Italy)
2016-02-01
We classify the trace anomaly for parity-invariant non-relativistic Schrödinger theories in 2+1 dimensions coupled to background Newton-Cartan gravity. The general anomaly structure looks very different from the one in the z=2 Lifshitz theories. The type A content of the anomaly is remarkably identical to that of the relativistic 3+1 dimensional case, suggesting the conjecture that an a-theorem should exist also in the Newton-Cartan context.
Moved by Mary: the power of pilgrimage in the modern world
Hermkens, A.K.; Jansen, W.H.M.; Notermans, C.D.
2009-01-01
The Virgin Mary continues to attract devotees to her images and shrines. In Moved by Mary, anthropologists, geographers and historians explore how people and groups around the world identify and join with Mary in their struggle against social injustice, and how others mobilize Mary to impose ideas
First Images and Spectra from ISAAC on UT1
1998-11-01
New VLT Instrument Delivers Spectacular Infrared Views of the Southern Sky The VLT Infrared Spectrometer And Array Camera (ISAAC) [1] was installed at the first 8.2-m VLT Unit Telescope (UT1) on November 14, 1998, cf. ESO PR Photos 42a-h/98. ISAAC is the second major VLT instrument to be installed at the VLT and the first to be fully designed and developed at ESO within its Instrumentation Division. Following evacuation of its large vacuum vessel, cooling to cryogenic temperature and alignment with the telescope according to the planned schedule, it successfully achieved technical first light during the night between November 16 and 17, 1998. ESO PR Photo 46a/98 ESO PR Photo 46a/98 [JPEG: 800 x 847 pix - 432k] [High-Res - JPEG: 3000 x 3175 pix - 2.9Mb] PR Photo 46a/98 shows ISAAC as it is now mounted at the UT1 Nasmyth B adaptor-rotator (right; blue colour). The co-rotator system (left) through which the various cables are fed to the instrument, is also well visible. (Photo obtained on November 16, 1998). The first focus tests on stars yielded images of excellent sharpness, around 0.45 arcsec full-width-half-maximum (FWHM). During the following nights, even better images, as small as 0.25 arcsec in relatively short exposures, were obtained, testifying to the quality of the site as well as the optical quality of both the telescope and instrument. Observations were executed using the new VLT Control and Data Flow Systems which are driven by Observation Blocks that define all details of the required astronomical exposures. In addition to direct images in various infrared colours (selected with different optical filters), spectroscopic observations were also made during the first few nights of operation. This Press Release is accompanied by several images and spectra which illustrate some of the exceptional new astronomical capabilities offered by this instrument. Star-Forming Region RCW38 in the Milky Way ESO PR Photo 46b/98 ESO PR Photo 46b/98 [Preview - JPEG: 800 x
Field-Split Preconditioned Inexact Newton Algorithms
Liu, Lulu
2015-06-02
The multiplicative Schwarz preconditioned inexact Newton (MSPIN) algorithm is presented as a complement to additive Schwarz preconditioned inexact Newton (ASPIN). At an algebraic level, ASPIN and MSPIN are variants of the same strategy to improve the convergence of systems with unbalanced nonlinearities; however, they have natural complementarity in practice. MSPIN is naturally based on partitioning of degrees of freedom in a nonlinear PDE system by field type rather than by subdomain, where a modest factor of concurrency can be sacrificed for physically motivated convergence robustness. ASPIN, originally introduced for decompositions into subdomains, is natural for high concurrency and reduction of global synchronization. We consider both types of inexact Newton algorithms in the field-split context, and we augment the classical convergence theory of ASPIN for the multiplicative case. Numerical experiments show that MSPIN can be significantly more robust than Newton methods based on global linearizations, and that MSPIN can be more robust than ASPIN and maintain fast convergence even for challenging problems, such as high Reynolds number Navier--Stokes equations.
Field-Split Preconditioned Inexact Newton Algorithms
Liu, Lulu; Keyes, David E.
2015-01-01
The multiplicative Schwarz preconditioned inexact Newton (MSPIN) algorithm is presented as a complement to additive Schwarz preconditioned inexact Newton (ASPIN). At an algebraic level, ASPIN and MSPIN are variants of the same strategy to improve the convergence of systems with unbalanced nonlinearities; however, they have natural complementarity in practice. MSPIN is naturally based on partitioning of degrees of freedom in a nonlinear PDE system by field type rather than by subdomain, where a modest factor of concurrency can be sacrificed for physically motivated convergence robustness. ASPIN, originally introduced for decompositions into subdomains, is natural for high concurrency and reduction of global synchronization. We consider both types of inexact Newton algorithms in the field-split context, and we augment the classical convergence theory of ASPIN for the multiplicative case. Numerical experiments show that MSPIN can be significantly more robust than Newton methods based on global linearizations, and that MSPIN can be more robust than ASPIN and maintain fast convergence even for challenging problems, such as high Reynolds number Navier--Stokes equations.
Newton-type methods for optimization and variational problems
Izmailov, Alexey F
2014-01-01
This book presents comprehensive state-of-the-art theoretical analysis of the fundamental Newtonian and Newtonian-related approaches to solving optimization and variational problems. A central focus is the relationship between the basic Newton scheme for a given problem and algorithms that also enjoy fast local convergence. The authors develop general perturbed Newtonian frameworks that preserve fast convergence and consider specific algorithms as particular cases within those frameworks, i.e., as perturbations of the associated basic Newton iterations. This approach yields a set of tools for the unified treatment of various algorithms, including some not of the Newton type per se. Among the new subjects addressed is the class of degenerate problems. In particular, the phenomenon of attraction of Newton iterates to critical Lagrange multipliers and its consequences as well as stabilized Newton methods for variational problems and stabilized sequential quadratic programming for optimization. This volume will b...
2007-01-01
Picture taken by Rudiger Voss in the Legal Service LibraryJean-Marie Dufour, CERN Legal Advisor from 1974 until his retirement in 2001, passed away on 8 July. For us, his colleagues in the Legal Service, Jean-Marie was a tutor and a reference, who passed on to us his passion for the practice of law in an intergovernmental organisation. As a boss, his abiding managerial quality was his unstinting loyalty to his collaborators. Jean-Marie joined CERN in 1966 and for the next 35 years was to be the guardian of the Laboratory’s rules. This was his view of the Organization: "...I have discovered [at CERN] a fascinating universe driven by two forces: science and Europe; a world of physicists and engineers who, encouraged by the States of Europe, run a remarkable Laboratory, where Europeans have achieved reconciliation and restored the grand tradition of European physics, attracting physicists from around the world; a Laboratory that transcends not only the fro...
The Work of John Isaac Plummer at Orwell Park Observatory in the years 1874 to 1890
Whiting, P. J.
2006-12-01
This paper builds on the unpublished collation by the Orwell Astronomical Society entitled John Isaac Plummer. It takes the form of a chronology and critique of papers published by John Isaac Plummer (1844-1925) in the Monthly Notices of the Royal Astronomical Society and Astronomische Nachrichten on work undertaken at the Orwell Park Observatory, Ipswich, in the years 1874 to 1890. This work, mainly, although not exclusively, in England, took the form of measuring the positions and deriving the orbits of as many comets as could be observed from Orwell Park. Plummer also published papers in other journals, such as Nature and The Observatory, but these are to be the subject of future research.
Newton's law in de Sitter brane
International Nuclear Information System (INIS)
Ghoroku, Kazuo; Nakamura, Akihiro; Yahiro, Masanobu
2003-01-01
Newton potential has been evaluated for the case of dS brane embedded in Minkowski, dS 5 and AdS 5 bulks. We point out that only the AdS 5 bulk might be consistent with the Newton's law from the brane-world viewpoint when we respect a small cosmological constant observed at present universe
3, 2, 1 ... Discovering Newton's Laws
Lutz, Joe; Sylvester, Kevin; Oliver, Keith; Herrington, Deborah
2017-01-01
"For every action there is an equal and opposite reaction." "Except when a bug hits your car window, the car must exert more force on the bug because Newton's laws only apply in the physics classroom, right?" Students in our classrooms were able to pick out definitions as well as examples of Newton's three laws; they could…
Newton-Krylov methods applied to nonequilibrium radiation diffusion
International Nuclear Information System (INIS)
Knoll, D.A.; Rider, W.J.; Olsen, G.L.
1998-01-01
The authors present results of applying a matrix-free Newton-Krylov method to a nonequilibrium radiation diffusion problem. Here, there is no use of operator splitting, and Newton's method is used to convert the nonlinearities within a time step. Since the nonlinear residual is formed, it is used to monitor convergence. It is demonstrated that a simple Picard-based linearization produces a sufficient preconditioning matrix for the Krylov method, thus elevating the need to form or store a Jacobian matrix for Newton's method. They discuss the possibility that the Newton-Krylov approach may allow larger time steps, without loss of accuracy, as compared to an operator split approach where nonlinearities are not converged within a time step
Mary Anne Chambers | IDRC - International Development Research ...
International Development Research Centre (IDRC) Digital Library (Canada)
A former Member of Provincial Parliament, Mary Anne served as Minister of Training, Colleges and Universities, and Minister of Children and Youth Services in the Government of Ontario. She is also a former senior vice-president of Scotiabank. A graduate of the University of Toronto, Mary Anne has received honorary ...
MaRIE Undulator & XFEL Systems
Energy Technology Data Exchange (ETDEWEB)
Nguyen, Dinh Cong [Los Alamos National Laboratory; Marksteiner, Quinn R. [Los Alamos National Laboratory; Anisimov, Petr Mikhaylovich [Los Alamos National Laboratory; Buechler, Cynthia Eileen [Los Alamos National Laboratory
2015-03-23
The 22 slides in this presentation treat the subject under the following headings: MaRIE XFEL Performance Parameters, Input Electron Beam Parameters, Undulator Design, Genesis Simulations, Risks, and Summary It is concluded that time-dependent Genesis simulations show the MaRIE XFEL can deliver the number of photons within the required bandwidth, provided a number of assumptions are met; the highest risks are associated with the electron beam driving the XFEL undulator; and risks associated with the undulator and/or distributed seeding technique may be evaluated or retired by performing early validation experiments.
Newton`s iteration for inversion of Cauchy-like and other structured matrices
Energy Technology Data Exchange (ETDEWEB)
Pan, V.Y. [Lehman College, Bronx, NY (United States); Zheng, Ailong; Huang, Xiaohan; Dias, O. [CUNY, New York, NY (United States)
1996-12-31
We specify some initial assumptions that guarantee rapid refinement of a rough initial approximation to the inverse of a Cauchy-like matrix, by mean of our new modification of Newton`s iteration, where the input, output, and all the auxiliary matrices are represented with their short generators defined by the associated scaling operators. The computations are performed fast since they are confined to operations with short generators of the given and computed matrices. Because of the known correlations among various structured matrices, the algorithm is immediately extended to rapid refinement of rough initial approximations to the inverses of Vandermonde-like, Chebyshev-Vandermonde-like and Toeplitz-like matrices, where again, the computations are confined to operations with short generators of the involved matrices.
Síndrome de Isaacs: relato de três casos
Directory of Open Access Journals (Sweden)
SCOLA ROSANA HERMÍNIA
1999-01-01
Full Text Available Relatamos três casos de síndrome de Isaacs, que apresentavam mioquímia clínica, cãibras, dificuldades para o relaxamento muscular, hipertrofia muscular e aumento da sudorese. A eletromiografia de agulha mostrou atividade muscular contínua involuntária, caracterizada como descargas mioquímicas. Os estudos da condução nervosa foram normais. Biópsia de músculo, realizado nos três casos, mostrou atrofia de fibras do tipo 2. Dois casos apresentaram melhora clínica com a utilização de carbamazepina e um com prednisona.
A jolly good call for Marie Curie Fellows
2009-01-01
A new funding opportunity to train young researchers has just been announced by the European Commission. One of the calls within FP7 Marie Curie Actions requests proposals for Initial Training Network (ITN) projects, with a deadline of 22 December 2009. Project proposals are strongly encouraged at CERN and authors can receive support and guidance from the Marie Curie Steering Group. Winnie Wong: "I wouldn’t have considered a PhD if I hadn’t been a Marie Curie fellow" Dan Savu: "It’s the best of both worlds: training plus working in an international organisation" ITN projects have one key aim: training. Academic and industrial partners work together to form a network to recruit and train Marie Curie Fellows. Fellows are young researchers (typically PhD-level) from any country who combine project-based research with tailor-made training programmes, ...
Meet EPA Scientist Marie O'Shea, Ph.D.
EPA Scientist Dr. Marie O'Shea is Region 2's Liaison to the Agency's Office of Research and Development (ORD). Marie has a background in research on urban watershed management, focused on characterizing and controlling nutrients in stormwater runoff.
Newton-Krylov-Schwarz methods in unstructured grid Euler flow
Energy Technology Data Exchange (ETDEWEB)
Keyes, D.E. [Old Dominion Univ., Norfolk, VA (United States)
1996-12-31
Newton-Krylov methods and Krylov-Schwarz (domain decomposition) methods have begun to become established in computational fluid dynamics (CFD) over the past decade. The former employ a Krylov method inside of Newton`s method in a Jacobian-free manner, through directional differencing. The latter employ an overlapping Schwarz domain decomposition to derive a preconditioner for the Krylov accelerator that relies primarily on local information, for data-parallel concurrency. They may be composed as Newton-Krylov-Schwarz (NKS) methods, which seem particularly well suited for solving nonlinear elliptic systems in high-latency, distributed-memory environments. We give a brief description of this family of algorithms, with an emphasis on domain decomposition iterative aspects. We then describe numerical simulations with Newton-Krylov-Schwarz methods on an aerodynamic application emphasizing comparisons with a standard defect-correction approach and subdomain preconditioner consistency.
Conformal mechanics in Newton-Hooke spacetime
International Nuclear Information System (INIS)
Galajinsky, Anton
2010-01-01
Conformal many-body mechanics in Newton-Hooke spacetime is studied within the framework of the Lagrangian formalism. Global symmetries and Noether charges are given in a form convenient for analyzing the flat space limit. N=2 superconformal extension is built and a new class on N=2 models related to simple Lie algebras is presented. A decoupling similarity transformation on N=2 quantum mechanics in Newton-Hooke spacetime is discussed.
Farewell Jean-Marie Good Luck Eva Welcome back Franz
2001-01-01
At the farewell reception offered by the Director-General, Professor Luciano Maiani, on the occasion of Jean-Marie Dufour's retirement from CERN, three generations of CERN Legal Counsel met. From right to left: Jean-Marie Dufour, who retires on 30 November 2001, after 35 years of service. Eva-Maria Gröniger-Voss, who takes over from Jean-Marie Dufour on 1st December 2001. Ambassador Franz Schmid, CERN Legal Counsel from 1971 to 1974.
Newton's law of cooling revisited
International Nuclear Information System (INIS)
Vollmer, M
2009-01-01
The cooling of objects is often described by a law, attributed to Newton, which states that the temperature difference of a cooling body with respect to the surroundings decreases exponentially with time. Such behaviour has been observed for many laboratory experiments, which led to a wide acceptance of this approach. However, the heat transfer from any object to its surrounding is not only due to conduction and convection but also due to radiation. The latter does not vary linearly with temperature difference, which leads to deviations from Newton's law. This paper presents a theoretical analysis of the cooling of objects with a small Biot number. It is shown that Newton's law of cooling, i.e. simple exponential behaviour, is mostly valid if temperature differences are below a certain threshold which depends on the experimental conditions. For any larger temperature differences appreciable deviations occur which need the complete nonlinear treatment. This is demonstrated by results of some laboratory experiments which use IR imaging to measure surface temperatures of solid cooling objects with temperature differences of up to 300 K.
Engineering international relations / Maris Riekstins ; interv. Talis Saule Archdeacon
Riekstins, Maris
2008-01-01
Läti annab peatselt Läänemeremaade Nõukogu eesistuja teatepulga üle Taanile. Läti välisminister Maris Riekstins Läänemeremaade Nõukogu teemadest ning suhetest Venemaaga. Maris Riekstins'i CV
Newton slopes for Artin-Schreier-Witt towers
DEFF Research Database (Denmark)
Davis, Christopher; Wan, Daqing; Xiao, Liang
2016-01-01
We fix a monic polynomial f(x)∈Fq[x] over a finite field and consider the Artin-Schreier-Witt tower defined by f(x); this is a tower of curves ⋯→Cm→Cm−1→⋯→C0=A1, with total Galois group Zp. We study the Newton slopes of zeta functions of this tower of curves. This reduces to the study of the Newton...... slopes of L-functions associated to characters of the Galois group of this tower. We prove that, when the conductor of the character is large enough, the Newton slopes of the L-function form arithmetic progressions which are independent of the conductor of the character. As a corollary, we obtain...
On the topology of the Newton boundary at infinity
International Nuclear Information System (INIS)
Pham Tien Son
2007-07-01
We will be interested in a global version of Le-Ramanujam μ -constant theorem from the Newton polyhedron point of view. More precisely, we prove a stability theorem which says that the global monodromy fibration of a polynomial with Newton non-degenerate is uniquely determined by its Newton boundary at infinity. Besides, the continuity of atypical values for a family of complex polynomial functions also is considered. (author)
Spaces of Modernism: Ljubica Marić in Context
Czech Academy of Sciences Publication Activity Database
Bajgarová, Jitka
2010-01-01
Roč. 47, č. 1 (2010), s. 109-111 ISSN 0018-7003. [Spaces of Modernism: Ljubica Marić in Context. Beograd, 05.11.2009-07.11.2009] Institutional research plan: CEZ:AV0Z90580513 Keywords : Ljubica Marić * Serbian composer Subject RIV: AL - Art, Architecture, Cultural Heritage
Verlet, Loup
1993-01-01
En 1936, une vente publique ramena au jour le contenu d'une malle où Newton avait enfermé ses manuscrits. Ô surprise, les travaux du savant y voisinaient avec les spéculations de l'exégète et de l'alchimiste. Ce n'est pas seulement la face cachée d'un exceptionnel génie scientifique qui nous était ainsi révélée, mais, au-delà du mystère d'un homme, le secret partage qui gouverne notre univers, comme le montre cette lecture originale de la naissance de la physique moderne.Dans quel monde suis-je tombé ? Pourquoi les choses sont-elles ainsi ? Comment faire avec ? Questions lancinantes de l'enfant quand la mère fait défaut, du chercheur face à la nature qui se dérobe. La réponse, Newton sait où la trouver : Dieu le Père, à jamais insaisissable, est présent «partout et toujours», Il se révèle par la bouche des prophètes, se devine dans les arcanes de l'alchimie, se manifeste par les lois admirables qui règlent le cours ordinaire des choses. Ses écrits de l'ombre l'attestent, Newton ...
Me & Isaac Newton. [Videotape and] KIDSNET Guide for Educators.
2001
This videotape records the stories of 7 scientists, 3 women and 4 men who range in age from 33 to 81. Beginning with their earliest scientific questions and including their most personal ponderings, the scientists reveal their histories and professional obligations to affect the world. Director Michael Apted allows the personal adventures of the…
Newtonian boreal forest ecology
Hari, Pertti; Aakala, Tuomas; Aalto, Juho; Bäck, Jaana; Hollmén, Jaakko; Jõgiste, Kalev; Koupaei, Kourosh Kabiri; Kähkönen, Mika A.; Korpela, Mikko; Kulmala, Liisa; Nikinmaa, Eero; Pumpanen, Jukka; Salkinoja-Salonen, Mirja; Schiestl-Aalto, Pauliina; Simojoki, Asko
2017-01-01
Isaac Newton's approach to developing theories in his book Principia Mathematica proceeds in four steps. First, he defines various concepts, second, he formulates axioms utilising the concepts, third, he mathematically analyses the behaviour of the system defined by the concepts and axioms obtaining predictions and fourth, he tests the predictions with measurements. In this study, we formulated our theory of boreal forest ecosystems, called NewtonForest, following the four steps introduced by...
A Construção lógica do "Estilo Newtoniano" The logical construction of the "Newtonian Style"
Directory of Open Access Journals (Sweden)
Raquel Anna Sapunaru
2008-01-01
Full Text Available O historiador da ciência Isaac Bernard Cohen batizou o novo método de "fazer ciência", criado por Isaac Newton, de "estilo newtoniano". Segundo Cohen, o cerne do "estilo newtoniano"seria a adaptação sucessiva das "construções mentais" - matemáticas - às comparações com a natureza e haveria dinâmica direta entre as "construções mentais" - matemáticas - e os sistemas físicos. Uma das principais características do "estilo newtoniano", portanto, seria primeiramente a matemática e, posteriormente, uma série de experimentos - e não o contrário. Brilhantemente, enquanto escrevia os Princípios Matemáticos de Filosofia Natural, Newton teria concluído que descrever o movimento de planetas e satélites, ou o movimento em geral, com precisão absoluta era imensamente mais complicado do que seus contemporâneos e antecessores poderiam ter pensado. A solução encontrada por ele foi, partindo de simples casos idealizados, passar progressivamente para casos mais complicados, também idealizados, e depois percorrer o caminho oposto, isto é: pelo desmembramento dos casos mais complicados provar os mais simples, embora sempre em direção à verdade.The science historian, Isaac Bernard Cohen named the new method of "making science" created by Isaac Newton by the name of "newtonian style". The central point of this "newtonian style", according to the definition of Cohen himself is the successive adaptation from "mental constructions" - to mathematical - to comparisons with nature. This means that, according to Cohen, a direct dynamic between "mental constructions" - mathematical - and physical systems should exist. For this reason, one of the most important characteristics of the "newtonian style" would be, first, mathematics and, afterwards, a series of experiments - and not the other way round. Newton would have brilliantly concluded, while writing the "Mathematical Principles of Natural Philosophy", that, to describe with absolute
Newton's law in braneworlds with an infinite extra dimension
Ito, Masato
2001-01-01
We study the behavior of the four$-$dimensional Newton's law in warped braneworlds. The setup considered here is a $(3+n)$-brane embedded in $(5+n)$ dimensions, where $n$ extra dimensions are compactified and a dimension is infinite. We show that the wave function of gravity is described in terms of the Bessel functions of $(2+n/2)$-order and that estimate the correction to Newton's law. In particular, the Newton's law for $n=1$ can be exactly obtained.
Hukum Newton Tentang Gerak Dalam Ruang Fase Tak Komutatif
Purwanto, Joko
2014-01-01
In this paper, the Newton's law of motions in a noncomutative phase space has been investigated. Its show that correction to the Newton's first and second law appear if we assume that the phase space has symplectic structure consistent with the rules of comutation of the noncomutative quantum mechanics. In the free particle and harmonic oscillator case the equations of motion are derived on basis of the modified Newton's second law in a noncomutative phase space.
Directory of Open Access Journals (Sweden)
MR Masjedi
2008-07-01
Full Text Available Introduction: International study on asthma was conducted to study the prevalence of Asthma symptoms among 13-14 year old children using written and video questionnaires during the early 90's. The aim of the present study (ISAAC was to evaluate the agreement between the two questionnaires which were self-completed by the children. Methods: This study, which was a part of the third phase of International Study of Asthma and Allergy in Childhood (ISAAC and performed exactly similar to phase1, was performed by National Research Institute of Tuberculosis and Lung Diseases (NRITLD in two cities of Iran; Rasht and Tehran. All stages of the study were performed in accordance with ISAAC protocol. The present study discusses data related to children of Tehran. A total of 3100 school children aged 13-14 years were questioned about asthma symptoms using written and video questionnaires of ISAAC study. For statistical analysis, initially a descriptive study of the available data was performed. Thereafter, chance corrected agreement between the two questionnaires was evaluated using Cohen’s Kappa co-efficiency. Results: Of the total of 3100 children, 52.4% were male and 47.6% female, with a mean age of 13.6 years. Although the questions discussed in the two questionnaires were not exactly similar, the results of the video questionnaires showed a statistically significant lower positive response to asthma symptoms as compared to the written version. Kappa co-efficiency ranged between 0.06- 0.21 (mean=0.12, which is considered poor for all variables. Conclusion: Positive responses to having asthma symptoms were significantly higher using the written questionnaire compared to the video questionnaire. Similar to previous studies, agreement between the two was considered poor for all variables. Although factors such as language, culture, dwelling area, e.t.c. have special effects on results of these questionnaires, results indicate that the two questionnaires
La politización en las lecturas canónicas: Miguel Antonio Caro, lector de Jorge Isaacs
Directory of Open Access Journals (Sweden)
Carlos Arturo López Jiménez
2008-12-01
Full Text Available The article herein shows some conceptual features of Miguel Antonio Caro’s intellectual project and its intrinsic strengths. Furthermore, it details the type of politicization which Caro imposed on some of the work of his contemporaries politicization which, in turn, was later imposed on him-self by contemporary historiography. More to the point, I evidence how Caro, when asserting that a particular text by Jorge Isaacs (The native tribes of the Magdalena basin was scientific, immediately proceeded to politicize Isaac’s work, among other things, because he (Caro did not have the relevant arguments needed to confront Isaacs’ text in its own terms and framework. Thus, in order to dismiss Isaacs’ objections raised against the government of Nuñez, Caro places the aforementioned work by the author of María, among the texts that threatened social order by presenting it as part and parcel of positivism, empiricism, liberalism, and all other intellectual efforts based on a damaging sensualism.//Aquí muestran algunos aspectos conceptuales del proyecto intelectual de Miguel Antonio Caro y su consistencia interna. Además, preciso el tipo específico de politización que este escritor impuso sobre algunos trabajos que le fueron contemporáneos –politización de la cual el mismo Caro ha sido objeto por parte de historiografía contemporánea–. Específicamente, presento cómo Miguel Antonio Caro, al afirmar que un texto de Isaacs (Las tribus indígenas del Magdalena es científico, politiza su trabajo por la imposibilidad de atacarlo dentro de los límites argumentativos del texto de Isaacs. De esta forma, para hacer a un lado las objeciones que Isaac eleva contra el gobierno de Núñez, Caro ubica el trabajo del autor de María en el grupo de escritos que amenazan el orden social, al presentarlo de la mano con el positivismo, empirismo, liberalismo y demás esfuerzos intelectuales fundados en un “nocivo” criterio sensualista.
Some Elementary Examples from Newton's Principia -R-ES ...
Indian Academy of Sciences (India)
ing both differential and integral calculus. Newton used many geometrical methods extensively to derive the re- sults in spite of his having discovered calculus. Geome- try, judiciously used with limiting procedures, was one principal strategy used by Newton in the Principia. The Principia presents an enormous range of ...
XMM-Newton On-demand Reprocessing Using SaaS Technology
Ibarra, A.; Fajersztejn, N.; Loiseau, N.; Gabriel, C.
2014-05-01
We present here the architectural design of the new on-the-fly reprocessing capabilities that will be soon developed and implemented in the new XMM-Newton Science Operation Centre. The inclusion of processing capabilities into the archive, as we plan, will be possible thanks to the recent refurbishment of the XMM-Newton science archive, its alignment with the latest web technologies and the XMM-Newton Remote Interface for Science Analysis (RISA), a revolutionary idea of providing processing capabilities through internet services.
Newton's Contributions to Optics
Indian Academy of Sciences (India)
creativity is apparent, even in ideas and models in optics that were ... Around Newton's time, a number of leading figures in science ..... successive circles increased as integers, i.e. d increases by inte- ... of easy reflections and transmission".
Disformal transformation in Newton-Cartan geometry
Energy Technology Data Exchange (ETDEWEB)
Huang, Peng [Zhejiang Chinese Medical University, Department of Information, Hangzhou (China); Sun Yat-Sen University, School of Physics and Astronomy, Guangzhou (China); Yuan, Fang-Fang [Nankai University, School of Physics, Tianjin (China)
2016-08-15
Newton-Cartan geometry has played a central role in recent discussions of the non-relativistic holography and condensed matter systems. Although the conformal transformation in non-relativistic holography can easily be rephrased in terms of Newton-Cartan geometry, we show that it requires a nontrivial procedure to arrive at the consistent form of anisotropic disformal transformation in this geometry. Furthermore, as an application of the newly obtained transformation, we use it to induce a geometric structure which may be seen as a particular non-relativistic version of the Weyl integrable geometry. (orig.)
Bargmann structures and Newton-Cartan theory
International Nuclear Information System (INIS)
Duval, C.; Burdet, G.; Kuenzle, H.P.; Perrin, M.
1985-01-01
It is shown that Newton-Cartan theory of gravitation can best be formulated on a five-dimensional extended space-time carrying a Lorentz metric together with a null parallel vector field. The corresponding geometry associated with the Bargmann group (nontrivially extended Galilei group) viewed as a subgroup of the affine de Sitter group AO(4,1) is thoroughly investigated. This new global formalism allows one to recast classical particle dynamics and the Schroedinger equation into a purely covariant form. The Newton-Cartan field equations are readily derived from Einstein's Lagrangian on the space-time extension
The fundamental constants a mystery of physics
Fritzsch, Harald
2009-01-01
The speed of light, the fine structure constant, and Newton's constant of gravity — these are just three among the many physical constants that define our picture of the world. Where do they come from? Are they constant in time and across space? In this book, physicist and author Harald Fritzsch invites the reader to explore the mystery of the fundamental constants of physics in the company of Isaac Newton, Albert Einstein, and a modern-day physicist
Czech Academy of Sciences Publication Activity Database
Axelsson, Owe; Sysala, Stanislav
2015-01-01
Roč. 70, č. 11 (2015), s. 2621-2637 ISSN 0898-1221 R&D Projects: GA ČR GA13-18652S Institutional support: RVO:68145535 Keywords : system of nonlinear equations * Newton method * load increment method * elastoplasticity Subject RIV: IN - Informatics, Computer Science Impact factor: 1.398, year: 2015 http://www.sciencedirect.com/science/article/pii/S0898122115003818
Newton force from wave function collapse: speculation and test
International Nuclear Information System (INIS)
Diósi, Lajos
2014-01-01
The Diosi-Penrose model of quantum-classical boundary postulates gravity-related spontaneous wave function collapse of massive degrees of freedom. The decoherence effects of the collapses are in principle detectable if not masked by the overwhelming environmental decoherence. But the DP (or any other, like GRW, CSL) spontaneous collapses are not detectable themselves, they are merely the redundant formalism of spontaneous decoherence. To let DP collapses become testable physics, recently we extended the DP model and proposed that DP collapses are responsible for the emergence of the Newton gravitational force between massive objects. We identified the collapse rate, possibly of the order of 1/ms, with the rate of emergence of the Newton force. A simple heuristic emergence (delay) time was added to the Newton law of gravity. This non-relativistic delay is in peaceful coexistence with Einstein's relativistic theory of gravitation, at least no experimental evidence has so far surfaced against it. We derive new predictions of such a 'lazy' Newton law that will enable decisive laboratory tests with available technologies. The simple equation of 'lazy' Newton law deserves theoretical and experimental studies in itself, independently of the underlying quantum foundational considerations.
Avangardistid Moskvas / Mari Sobolev
Sobolev, Mari, 1968-
2000-01-01
Valdek Alberi ja Taave Tuutma videoinstallatsioonist "Think different" näitusel "Salon 2000" Moskva Kunstnike Keskmajas 16.-26. III. Kuraator Mari Sobolev. Eesti väljapaneku vastukajast ja Jüri Arrakust, kelle maalid olid näitusel "Balti meistrid", ajalehes "Kommersant". Moskva kunstinäitustest.
INVESTIGATION OF THE MISCONCEPTION IN NEWTON II LAW
Directory of Open Access Journals (Sweden)
Yudi Kurniawan
2018-04-01
Full Text Available This study aims to provide a comprehensive description of the level of the number of students who have misconceptions about Newton's II Law. This research is located at one State Junior High School in Kab. Pandeglang. The purposive sampling was considering used in this study because it is important to distinguish students who do not know the concept of students who experience misconception. Data were collected using a three tier-test diagnostic test and analyzed descriptively quantitatively. The results showed that the level of misconception was in the two categories of high and medium levels. It needs an innovative teaching technique for subsequent research to treat Newton's Newton misconception.
Preconditioned Inexact Newton for Nonlinear Sparse Electromagnetic Imaging
Desmal, Abdulla
2014-05-04
Newton-type algorithms have been extensively studied in nonlinear microwave imaging due to their quadratic convergence rate and ability to recover images with high contrast values. In the past, Newton methods have been implemented in conjunction with smoothness promoting optimization/regularization schemes. However, this type of regularization schemes are known to perform poorly when applied in imagining domains with sparse content or sharp variations. In this work, an inexact Newton algorithm is formulated and implemented in conjunction with a linear sparse optimization scheme. A novel preconditioning technique is proposed to increase the convergence rate of the optimization problem. Numerical results demonstrate that the proposed framework produces sharper and more accurate images when applied in sparse/sparsified domains.
Preconditioned Inexact Newton for Nonlinear Sparse Electromagnetic Imaging
Desmal, Abdulla
2014-01-06
Newton-type algorithms have been extensively studied in nonlinear microwave imaging due to their quadratic convergence rate and ability to recover images with high contrast values. In the past, Newton methods have been implemented in conjunction with smoothness promoting optimization/regularization schemes. However, this type of regularization schemes are known to perform poorly when applied in imagining domains with sparse content or sharp variations. In this work, an inexact Newton algorithm is formulated and implemented in conjunction with a linear sparse optimization scheme. A novel preconditioning technique is proposed to increase the convergence rate of the optimization problem. Numerical results demonstrate that the proposed framework produces sharper and more accurate images when applied in sparse/sparsified domains.
Preconditioned Inexact Newton for Nonlinear Sparse Electromagnetic Imaging
Desmal, Abdulla; Bagci, Hakan
2014-01-01
Newton-type algorithms have been extensively studied in nonlinear microwave imaging due to their quadratic convergence rate and ability to recover images with high contrast values. In the past, Newton methods have been implemented in conjunction with smoothness promoting optimization/regularization schemes. However, this type of regularization schemes are known to perform poorly when applied in imagining domains with sparse content or sharp variations. In this work, an inexact Newton algorithm is formulated and implemented in conjunction with a linear sparse optimization scheme. A novel preconditioning technique is proposed to increase the convergence rate of the optimization problem. Numerical results demonstrate that the proposed framework produces sharper and more accurate images when applied in sparse/sparsified domains.
[Marie Heiberg. Üks naine kurbade silmadega] / Marko Mägi
Mägi, Marko
2010-01-01
Arvustus: Heiberg, Marie. Üks naine kurbade silmadega : Eesti luuletaja Marie Heibergi õnne ja valu, rõõmu ja mure lugu kirjades / [koostajad Iivi Lepik, Kirsten Simmo]. Tallinn : Eesti Teatri- ja Muusikamuuseum : SE & JS, 2010
Quasi-Newton methods for implicit black-box FSI coupling
CSIR Research Space (South Africa)
Bogaers, Alfred EJ
2014-09-01
Full Text Available In this paper we introduce a new multi-vector update quasi-Newton (MVQN) method for implicit coupling of partitioned, transient FSI solvers. The new quasi-Newton method facilitates the use of 'black-box' field solvers and under certain circumstances...
Marie and Pierre Curie. Life in extremes
International Nuclear Information System (INIS)
Roethlein, Brigitte
2008-01-01
In Paris in 1894, two young physicists fall in love: Marie Sklodowska and Pierre Curie. They get married and make great contributions to science, research radioactivity and discover new chemical elements. The marriage of Marie and Pierre Curie is quite modern: They work together as equals, share their thoughts and pursue their plans together as partners. They share an absolute interest in science, a love of nature, and a sceptic attitude towards the sophisticated society of the Belle Epoque. They are together 24 hours a day with hardly ever any disagreement. Whenever one of them is ill - which is quite often because of the high level of radioactivity in their laboratory -, the other will nurse him or her. After only twelve years of mutual love, Pierre Curie dies. Marie raises their two daughters on her own and continues her research. In 1911, she will be the first scientist that ever gets a second Nobel Prize. (orig.) [de
Experimental Physical Sciences Vistas: MaRIE (draft)
Energy Technology Data Exchange (ETDEWEB)
Shlachter, Jack [Los Alamos National Laboratory
2010-09-08
To achieve breakthrough scientific discoveries in the 21st century, a convergence and integration of world-leading experimental facilities and capabilities with theory, modeling, and simulation is necessary. In this issue of Experimental Physical Sciences Vistas, I am excited to present our plans for Los Alamos National Laboratory's future flagship experimental facility, MaRIE (Matter-Radiation Interactions in Extremes). MaRIE is a facility that will provide transformational understanding of matter in extreme conditions required to reduce or resolve key weapons performance uncertainties, develop the materials needed for advanced energy systems, and transform our ability to create materials by design. Our unique role in materials science starting with the Manhattan Project has positioned us well to develop a contemporary materials strategy pushing the frontiers of controlled functionality - the design and tailoring of a material for the unique demands of a specific application. Controlled functionality requires improvement in understanding of the structure and properties of materials in order to synthesize and process materials with unique characteristics. In the nuclear weapons program today, improving data and models to increase confidence in the stockpile can take years from concept to new knowledge. Our goal with MaRIE is to accelerate this process by enhancing predictive capability - the ability to compute a priori the observables of an experiment or test and pertinent confidence intervals using verified and validated simulation tools. It is a science-based approach that includes the use of advanced experimental tools, theoretical models, and multi-physics codes, simultaneously dealing with multiple aspects of physical operation of a system that are needed to develop an increasingly mature predictive capability. This same approach is needed to accelerate improvements to other systems such as nuclear reactors. MaRIE will be valuable to many national
Directory of Open Access Journals (Sweden)
Fu Yuhua
2014-06-01
Full Text Available Neutrosophy is a new branch of philosophy, and "Quad-stage" (Four stages is the expansion of Hegel’s triad thesis, antithesis, synthesis of development. Applying Neutrosophy and "Quad-stage" method, the purposes of this paper are expanding Newton Mechanics and making it become New Newton Mechanics (NNW taking law of conservation of energy as unique source law. In this paper the examples show that in some cases other laws may be contradicted with the law of conservation of energy. The original Newton's three laws and the law of gravity, in principle can be derived by the law of conservation of energy. Through the example of free falling body, this paper derives the original Newton's second law by using the law of conservation of energy, and proves that there is not the contradiction between the original law of gravity and the law of conservation of energy; and through the example of a small ball rolls along the inclined plane (belonging to the problem cannot be solved by general relativity that a body is forced to move in flat space, derives improved Newton's second law and improved law of gravity by using law of conservation of energy. Whether or not other conservation laws (such as the law of conservation of momentum and the law of conservation of angular momentum can be utilized, should be tested by law of conservation of energy. When the original Newton's second law is not correct, then the laws of conservation of momentum and angular momentum are no longer correct; therefore the general forms of improved law of conservation of momentum and improved law of conservation of angular momentum are presented. In the cases that law of conservation of energy cannot be used effectively, New Newton Mechanics will not exclude that according to other theories or accurate experiments to derive the laws or formulas to solve some specific problems. For example, with the help of the result of general relativity, the improved Newton's formula of universal
Energy Technology Data Exchange (ETDEWEB)
Noordenbos, G. [Joke Smit Instituut voor Vrouwenstudies, Universiteit Leiden, Leiden (Netherlands)
2003-07-01
Marie Curie was awarded the Nobel Prize in 1903 and in 1911. Also her daughter, Irene Joliot-Curie, received a Nobel Prize for science in 1935. In this book an overview is given of the academic world at that time: limited access to universities for women, the carriers of both women in physics and their pioneering research and discoveries, the refusal of Marie Curie by the French Academy of Sciences, the awarding of the Nobel Prize and the assignment of Irene Joliot-Curie as the first female minister in France, the impact of the two World Wars, their married and private lives and the constant smear campaign of the press against both women. The lives and works of both women are hold against the light of the present position of women in physical sciences. [Dutch] In 1903, precies honderd jaar geleden, ontving Marie Curie als eerste vrouw de Nobelprijs voor de Wetenschap, gevolgd door een tweede Nobelprijs in 1911. Ook haar dochter Irene Joliot-Curie kreeg de Nobelprijs voor de wetenschap in 1935. Marie and Irene Curie schetst een breed beeld van de academische wereld waarin beide vrouwen zich bewogen: de beperkte toegang van vrouwen tot de universiteit, hun carrisres in de natuurkunde en baanbrekende ontdekkingen, de afwijzing van Marie door de Franse Academie des Sciences, de toekenning van de Nobelprijs en de benoeming van Irene als eerste vrouwelijke minister in Frankrijk, de invloed van de twee Wereldoorlogen, hun huwelijks- en priveleven en de niet aflatende hetze van de pers tegen beiden. In de door mannen gedomineerde wereld van de natuurwetenschappen liep de uitzonderingspositie van beide vrouwen als rode draad door hun curieuze levens. Het leven en werk van de Curies wordt geactualiseerd door deze tegen het licht te houden van de huidige positie van vrouwen in de natuurwetenschappen. Het bereiken van de top van de wetenschap door vrouwen blijkt nog steeds uitzonderlijk.
Dynamic Newton-Puiseux Theorem
DEFF Research Database (Denmark)
Mannaa, Bassel; Coquand, Thierry
2013-01-01
A constructive version of Newton-Puiseux theorem for computing the Puiseux expansions of algebraic curves is presented. The proof is based on a classical proof by Abhyankar. Algebraic numbers are evaluated dynamically; hence the base field need not be algebraically closed and a factorization...
Genetic Diversity in Durum Wheat in Palestine: A Comparative Study
African Journals Online (AJOL)
NNU
2012-08-16
Aug 16, 2012 ... natural habitats and field edges and landraces grown under traditional farming systems (Isaac and Gasteyer,. 1995). Morphological variation exists among these ... have become a basic and essential tool for detecting genetic variation and elucidating unknown DNA sequences (Newton and Graham, 1994).
Discovery of a Probable Nova in M81 and Photometry of Three M81 Novae
Hornoch, K.; Errmann, R.; Carlisle, Ch.; Vaduvescu, O.
2015-02-01
We report the discovery of a probable nova in M81 on a co-added 1600-s narrow-band H-alpha CCD image taken with the 2.5-m Isaac Newton Telescope (INT) + WFC at La Palma under ~1.6" seeing on 2015 Jan.
Takahashi, Hirokatsu; Mori, Masahiro; Sekiguchi, Yukari; Misawa, Sonoko; Sawai, Setsu; Hattori, Takamichi; Kuwabara, Satoshi
2008-12-15
Autoantibodies against voltage-gated potassium channels (VGKC-Abs) are associated with acquired neuromyotonia (Isaacs' syndrome) and related disorders such as Morvan's syndrome and some cases of limbic encephalitis. The mechanisms underlying the various phenotypes induced by VGKC-Abs are not fully understood. Recently, we reported a case of LE with VGKC-Abs accompanied by severe intestinal pseudo-obstruction and thymoma. Thymectomy and immunosuppressive therapy induced dramatic clinical improvement of LE symptoms, and VGKC-Abs titers decreased from 1254 pM to 549 pM (normal>100 pM). Seventeen months later, the patient developed progressive generalized muscle cramping, paresthesias in his lower extremities, excessive sweating, and severe constipation. There was no recurrence of the LE. Electromyography showed fasciculation potentials and myokymic discharges, and the plasma VGKC-Abs titer was again elevated to 879 pM. Here we report a case of Isaacs' syndrome after complete remission of LE with VGKC-Abs that may provide an insight into a possible link among VGKC-Abs associated syndromes.
Newton\\'s equation of motion in the gravitational field of an oblate ...
African Journals Online (AJOL)
In this paper, we derived Newton's equation of motion for a satellite in the gravitational scalar field of a uniformly rotating, oblate spheriodal Earth using spheriodal coordinates. The resulting equation is solved for the corresponding precession and the result compared with similar ones. JONAMP Vol. 11 2007: pp. 279-286 ...
Mary as Mother in the Flores de Mayo in Poblacion, Oslob
Directory of Open Access Journals (Sweden)
Patricia Marion Y. Lopez
2016-06-01
Full Text Available The paper reflects on the meanings of the Flores de Mayo ritual as performed in a town on the southeastern coast of Cebu through the examination of Mary as a “semantically open” symbol. The essay illustrates how ideas about Mary are constructed through the discourse of the Church and are in turn, reinforced through a Church-instituted and regulated ritual. An analysis of selected elements of the ritual however, reveals that the symbol of Mary has the potential to hold “other” kinds of meanings that slip in between “official” and “unofficial” discourses, highlighting how Mary continues to be a negotiated field between church authorities and the popular faithful.
Special Workshop of Marie Curie Fellows on Research and Training in Physics and Technology
Patrice Loiez
2002-01-01
Photo 0210006_07a: Prof. L. Maiani, Director General of CERN. Addressing the Marie Curie Worshop held at CERN 3-4 October 2002. Title of this talk:"Function of Large-scale Facilities and Centres of Excellence". Photo 0210006_14a: Prof. L. Maiani, Director General of CERN. Addressing the Marie Curie Worshop held at CERN 3-4 October 2002. Title of this talk:"Function of Large-scale Facilities and Centres of Excellence". Photo 0210006_22: Dr. David Plane (CERN) introducing Dr. Theodore Papazoglou from the European Commission. Addressing the Marie Curie Worshop held at CERN 3-4 October 2002. Title of this talk:"Marie Curie Fellowships in the 6th Framework Programme". Photo 0210006_28a: Dr. Nora Brambilla, Vice-President of Marie Curie Fellow Association, INFN and Dept. of Physics, University of Milan. Addressing the Marie-Curie Worshop held at CERN 3-4 October 2002. Title of this talk:"Marie Curie Fellows Association". Photo 0210006_29a: Dr. Nora Brambilla, Vice-President of Marie Curie Fellow Association, INFN a...
Coupling of partitioned physics codes with quasi-Newton methods
CSIR Research Space (South Africa)
Haelterman, R
2017-03-01
Full Text Available , A class of methods for solving nonlinear simultaneous equations. Math. Comp. 19, pp. 577–593 (1965) [3] C.G. Broyden, Quasi-Newton methods and their applications to function minimization. Math. Comp. 21, pp. 368–381 (1967) [4] J.E. Dennis, J.J. More...´, Quasi-Newton methods: motivation and theory. SIAM Rev. 19, pp. 46–89 (1977) [5] J.E. Dennis, R.B. Schnabel, Least Change Secant Updates for quasi- Newton methods. SIAM Rev. 21, pp. 443–459 (1979) [6] G. Dhondt, CalculiX CrunchiX USER’S MANUAL Version 2...
Various Newton-type iterative methods for solving nonlinear equations
Directory of Open Access Journals (Sweden)
Manoj Kumar
2013-10-01
Full Text Available The aim of the present paper is to introduce and investigate new ninth and seventh order convergent Newton-type iterative methods for solving nonlinear equations. The ninth order convergent Newton-type iterative method is made derivative free to obtain seventh-order convergent Newton-type iterative method. These new with and without derivative methods have efficiency indices 1.5518 and 1.6266, respectively. The error equations are used to establish the order of convergence of these proposed iterative methods. Finally, various numerical comparisons are implemented by MATLAB to demonstrate the performance of the developed methods.
Non-Relativistic Twistor Theory and Newton-Cartan Geometry
Dunajski, Maciej; Gundry, James
2016-03-01
We develop a non-relativistic twistor theory, in which Newton-Cartan structures of Newtonian gravity correspond to complex three-manifolds with a four-parameter family of rational curves with normal bundle O oplus O(2)}. We show that the Newton-Cartan space-times are unstable under the general Kodaira deformation of the twistor complex structure. The Newton-Cartan connections can nevertheless be reconstructed from Merkulov's generalisation of the Kodaira map augmented by a choice of a holomorphic line bundle over the twistor space trivial on twistor lines. The Coriolis force may be incorporated by holomorphic vector bundles, which in general are non-trivial on twistor lines. The resulting geometries agree with non-relativistic limits of anti-self-dual gravitational instantons.
Becker, Ellen; Becker, Larry; McPheeters, Tom; Mercogliano, Chris
1999-01-01
Mary Leue started the Free School, an independent, alternative elementary school in inner-city Albany (New York), based on open democratic education dedicated to the authentic lives of children. Other accomplishments include a community-investment organization, a magazine of alternative education, a magazine for empowering families, and a…
Eisma sadamahoone = Eisma port building / Mari Kurismaa ; kommenteerinud Krista Aren
Kurismaa, Mari, 1956-
2015-01-01
Eluruumid Eisma sadamahoones (Eisma küla, Vihula vald, Lääne-Virumaa). Sisekujunduse autorid Mari Kurismaa, Indrek Allmann; arhitekt Indrek Allmann (AB Pluss). Eesti Sisearhitektide Liidu aastapreemia 2014/2015 parima kodu eest. Lühidalt Mari Kurismaast ja Indrek Allmannist
Mari Martin - vahelüli looja ja kandja vahel / Mari Martin ; intervjueerinud Tanel Veenre
Martin, Mari, 1983-
2009-01-01
Kalamari Promotioni tegevjuht, Tartu Ülikoolis majandust õppiv Mari Martin oma esimestest sammudest moemaailmas, kaubamärkide ReUse RePublic (premeeriti noorte äriideede võistlusel "Ajujaht 2009" 175000 krooniga) ja Tallinn Dolls loomisest, eesti disaineritest, unistustest seoses eesti disainiga
On the classification of plane graphs representing structurally stable rational Newton flows
Jongen, H.Th.; Jonker, P.; Twilt, F.
1991-01-01
We study certain plane graphs, called Newton graphs, representing a special class of dynamical systems which are closely related to Newton's iteration method for finding zeros of (rational) functions defined on the complex plane. These Newton graphs are defined in terms of nonvanishing angles
Great Physicists - The Life and Times of Leading Physicists from Galileo to Hawking
Cropper, William H.
2004-09-01
Here is a lively history of modern physics, as seen through the lives of thirty men and women from the pantheon of physics. William H. Cropper vividly portrays the life and accomplishments of such giants as Galileo and Isaac Newton, Marie Curie and Ernest Rutherford, Albert Einstein and Niels Bohr, right up to contemporary figures such as Richard Feynman, Murray Gell-Mann, and Stephen Hawking. We meet scientists--all geniuses--who could be gregarious, aloof, unpretentious, friendly, dogged, imperious, generous to colleagues or contentious rivals. As Cropper captures their personalities, he also offers vivid portraits of their great moments of discovery, their bitter feuds, their relations with family and friends, their religious beliefs and education. In addition, Cropper has grouped these biographies by discipline--mechanics, thermodynamics, particle physics, and others--each section beginning with a historical overview. Thus in the section on quantum mechanics, readers can see how the work of Max Planck influenced Niels Bohr, and how Bohr in turn influenced Werner Heisenberg. Our understanding of the physical world has increased dramatically in the last four centuries. With Great Physicists , readers can retrace the footsteps of the men and women who led the way.
Mari Koger : "Arhitekte on palju. Tuleb leida õige" / Gitte Hint
Hint, Gitte
2003-01-01
Mari Koger (sünd. 1973) kodu kujundamisest, planeerimisest, valgustusest, värvidest, suhtlemisest kliendiga. Mari Kogerist, loetletud tema tehtud ühiskondlike ruumide sisekujundused aastast 2002. M. Koger töötab Boom.ee OÜ-s. Ill.: M. Kogeri värv. portree
Mills, Randy K.; Woods, John C.
1996-01-01
Utilizes selections from 17th century philosophical writing as instructional material for a series of learning activities that reveal the influence of the material on early American democratic thought. Activities involve selections from Isaac Newton, John Locke, Montesquieu, Rousseau, The Declaration of Independence, and Bishop Bossuet. (MJP)
Cataclysmic variables from a ROSAT/2MASS selection - I. Four new intermediate polars
Gänsicke, B.T.; Marsh, T.R.; Edge, A.; Rodríguez-Gil, P.; Steeghs, D.; Araujo-Betancor, S.; Harlaftis, E.; Giannakis, O.; Pyrzas, S.; Morales-Rueda, L.; Aungwerojwit, A.
2005-01-01
We report the first results from a new search for cataclysmic variables (CVs) using a combined X-ray (ROSAT)/infrared (2MASS) target selection that discriminates against background active galactic nuclei. Identification spectra were obtained at the Isaac Newton Telescope for a total of 174 targets,
Discovery of an Apparent Nova in M81
Hornoch, K.; Alfaro, M. Diaz; Ordonez-Etxeberria, I.; Vaduvescu, O.
2015-01-01
We report the discovery of an apparent nova in M81 on a co-added 1600-s narrow-band H-alpha CCD image taken with the 2.5-m Isaac Newton Telescope (INT) + WFC at La Palma under ~2.4" seeing on 2015 Jan. 15.126 UT.
Characterising atmospheric optical turbulence using stereo-SCIDAR
Osborn, James; Butterley, Tim; Föhring, Dora; Wilson, Richard
2015-04-01
Stereo-SCIDAR (SCIntillation Detection and Ranging) is a development to the well known SCIDAR method for characterisation of the Earth's atmospheric optical turbulence. Here we present some interesting capabilities, comparisons and results from a recent campaign on the 2.5 m Isaac Newton Telescope on La Palma.
An evolutionary link between Seyfert I and II galaxies
International Nuclear Information System (INIS)
Penston, M.V.; Perez, E.
1984-01-01
First spectra from the newly sited Isaac Newton Telescope show NGC 4151 and 3C 390.3 to have taken on a classification very close to Seyfert II. It is proposed that Seyfert II galaxies are Seyfert Is in which the continuum source is temporarily off. (author)
Eigenvalue Decomposition-Based Modified Newton Algorithm
Directory of Open Access Journals (Sweden)
Wen-jun Wang
2013-01-01
Full Text Available When the Hessian matrix is not positive, the Newton direction may not be the descending direction. A new method named eigenvalue decomposition-based modified Newton algorithm is presented, which first takes the eigenvalue decomposition of the Hessian matrix, then replaces the negative eigenvalues with their absolute values, and finally reconstructs the Hessian matrix and modifies the searching direction. The new searching direction is always the descending direction. The convergence of the algorithm is proven and the conclusion on convergence rate is presented qualitatively. Finally, a numerical experiment is given for comparing the convergence domains of the modified algorithm and the classical algorithm.
Newton da Costa and the school of Curitiba
Directory of Open Access Journals (Sweden)
Artibano Micali
2011-06-01
Full Text Available This paper intends to report on the beginning of the publications of Newton da Costa outside Brazil. Two mathematicians played an important role in this beginning: Marcel Guillaume from the University of Clermont-Ferrand and Paul Dedecker from the Universities of Lille and Liège. At the same time we recall the role played by Newton da Costa and Jayme Machado Cardoso in the development of what we call here the School of Curitiba [Escola de Curitiba]. Paraconsistent logic was initiated in this school under the influence of Newton da Costa. As another contribution of this school we mention the development of the theory of quasigroups; Jayme Machado Cardoso's name has been given, by Sade, to some particular objects which are now called Cardoso quasigroups.
Students’ misconceptions about Newton's second law in outer space
International Nuclear Information System (INIS)
Temiz, B K; Yavuz, A
2014-01-01
Students’ misconceptions about Newton's second law in frictionless outer space were investigated. The research was formed according to an epistemic game theoretical framework. The term ‘epistemic’ refers to students’ participation in problem-solving activities as a means of constructing new knowledge. The term ‘game’ refers to a coherent activity that consists of moves and rules. A set of questions in which students are asked to solve two similar Newton's second law problems, one of which is on the Earth and the other in outer space, was administered to 116 undergraduate students. The findings indicate that there is a significant difference between students’ epistemic game preferences and race-type (outer space or frictional surface) question. So students who used Newton's second law on the ground did not apply this law and used primitive reasoning when it came to space. Among these students, voluntary interviews were conducted with 18 students. Analysis of interview transcripts showed that: (1) the term ‘space’ causes spontaneity among students that prevents the use of the law; (2) students hesitate to apply Newton's second law in space due to the lack of a condition—the friction; (3) students feel that Newton's second law is not valid in space for a variety of reasons, but mostly for the fact that the body in space is not in contact with a surface. (paper)
Newton's Contributions to Optics
Indian Academy of Sciences (India)
Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 12. Newton's Contributions to Optics. Arvind Kumar. General Article Volume 11 Issue 12 December 2006 pp 10-20. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/011/12/0010-0020. Keywords.
Can Newton's Third Law Be "Derived" from the Second?
Gangopadhyaya, Asim; Harrington, James
2017-01-01
Newton's laws have engendered much discussion over several centuries. Today, the internet is awash with a plethora of information on this topic. We find many references to Newton's laws, often discussions of various types of misunderstandings and ways to explain them. Here we present an intriguing example that shows an assumption hidden in…
A variational principle for Newton-Cartan theory
International Nuclear Information System (INIS)
Goenner, H.F.M.
1984-01-01
In the framework of a space-time theory of gravitation a variational principle is set up for the gravitational field equations and the equations of motion of matter. The general framework leads to Newton's equations of motion with an unspecified force term and, for irrotational motion, to a restriction on the propagation of the shear tensor along the streamlines of matter. The field equations obtained from the variation are weaker than the standard field equations of Newton-Cartan theory. An application to fluids with shear and bulk viscosity is given. (author)
The Celestial Mechanics of Newton
Indian Academy of Sciences (India)
hannes Kepler had announced his first two laws of plan- etary motion (AD 1609), ... "Mathematical Principles of Natural Philosophy" .... He provided two different sets of proofs .... the Sun. Newton then formulated a theory of tides based on the.
The Moral and Ethical Implications of Precision-Guided Munitions
2007-03-01
state was secured permanently on the world political stage. Grotius was to jurisprudence and the just-war tradition as Francis Bacon and Rene ... Descartes were to philosophy and Galileo Galilei and Sir Isaac Newton were to applied science. Grotius’ interpretation of the just-war tra- dition as it
Rockets: An Educator's Guide with Activities in Science, Mathematics, and Technology.
National Aeronautics and Space Administration, Washington, DC.
This educational guide discusses rockets and includes activities in science, mathematics, and technology. It begins with background information on the history of rocketry, scientific principles, and practical rocketry. The sections on scientific principles and practical rocketry focus on Sir Isaac Newton's Three Laws of Motion. These laws explain…
INT WFC follow-up photometry of the M31 nova M31N 2017-10a
Hermosa-Munoz, L.; Garcia-Rivas, M.; Gonzalez-Cuesta, L.; Jimenez-Gallardo, A.; Mantero-Castaneda, E. A.; Arce-Tord, C.; Prendin, M. G.; Rodriguez-Sanchez, M.; Esteban-Gutierrez, A.; Garcia-Broock, E.; Hernandez-Sanchez, M.; Lopez-Navas, E.; Otero-Santos, J.; Perez-Fournon, I.
2017-12-01
We report follow-up photometry in the Sloan g, r, and i bands, 240s per band, of the nova M31N 2017-10a ( = PNV J00423905+4123006) from observations on the night of 29 October 2017 with the Wide Field Camera of the Isaac Newton Telescope*.
African Journals Online (AJOL)
2013 Isaac Newton and student college completion. Journal of College Student Retention. 15, 1-7. 2012 Completing College: Rethinking institutional action. Chicago: The University of. Chicago Press. 2011 Moving from theory to action: A model of institutional action for student success. In A. Seidman (Ed.), College Student ...
Indian Academy of Sciences (India)
Usha N Bhosle. Acknowledgements. This work was initiated during the author's visit to the Isaac Newton Institute, Cambridge,. UK as a visiting fellow to participate in the programme Moduli Spaces (MOS) during. June 2011. She would like to thank the Institute for hospitality and excellent working environment. References.
Achievements, agreements and quarrels of forefathers of mechanics
Directory of Open Access Journals (Sweden)
Okrouhlík M.
2015-12-01
Full Text Available The presented paper is devoted to deeds of Galileo Galilei, Johannes Kepler, Robert Hooke, Christiaan Huygens and Isaac Newton with an intention to show their achievements in mechanics, their intellectual and scientific heritage, and also their personal vanities that sometimes led to harmful mutual relations.
Indian Academy of Sciences (India)
Home; Fellowship. Fellow Profile. Elected: 1935 Honorary. Lewis, Prof. Gilbert Newton. Date of birth: 25 October 1875. Date of death: 24 March 1946. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. 29th Mid-year meeting. Posted on 19 January 2018. The 29th Mid-year meeting of the Academy will be held ...
Space and motion in nature and Scripture: Galileo, Descartes, Newton.
Janiak, Andrew
2015-06-01
In the Scholium to the Definitions in Principia mathematica, Newton departs from his main task of discussing space, time and motion by suddenly mentioning the proper method for interpreting Scripture. This is surprising, and it has long been ignored by scholars. In this paper, I argue that the Scripture passage in the Scholium is actually far from incidental: it reflects Newton's substantive concern, one evident in correspondence and manuscripts from the 1680s, that any general understanding of space, time and motion must enable readers to recognize the veracity of Biblical claims about natural phenomena, including the motion of the earth. This substantive concern sheds new light on an aspect of Newton's project in the Scholium. It also underscores Newton's originality in dealing with the famous problem of reconciling theological and philosophical conceptions of nature in the seventeenth century. Copyright © 2015 Elsevier Ltd. All rights reserved.
Directory of Open Access Journals (Sweden)
Katarina Šter
2017-06-01
Full Text Available The Office of Mary Magdalene is one of the rare offices of the Carthusian liturgy that was changed after it had been established as a solemn feast with twelve lessons. In Matins, several chants changed their position or were even replaced by new ones. This article examines the relationship between the earlier and the later Office of St Mary Magdalene. Later corrections in the Lauds first antiphon, Maria stabat ad monumentum receive some special attention since they open new questions concerning the unity of the Carthusian liturgical tradition, and a possible connection between individual Carthusian manuscripts.
Life after Newton: an ecological metaphysic.
Ulanowicz, R E
1999-05-01
Ecology may indeed be 'deep', as some have maintained, but perhaps much of the mystery surrounding it owes more simply to the dissonance between ecological notions and the fundamentals of the modern synthesis. Comparison of the axioms supporting the Newtonian world view with those underlying the organicist and stochastic metaphors that motivate much of ecosystems science reveals strong disagreements--especially regarding the nature of the causes of events and the scalar domains over which these causes can operate. The late Karl Popper held that the causal closure forced by our mechanical perspective on nature frustrates our attempts to achieve an 'evolutionary theory of knowledge.' He suggested that the Newtonian concept of 'force' must be generalized to encompass the contingencies that arise in evolutionary processes. His reformulation of force as 'propensity' leads quite naturally to a generalization of Newton's laws for ecology. The revised tenets appear, however, to exhibit more scope and allow for change to arise from within a system. Although Newton's laws survive (albeit in altered form) within a coalescing ecological metaphysic, the axioms that Enlightenment thinkers appended to Newton's work seem ill-suited for ecology and perhaps should yield to a new and coherent set of assumptions on how to view the processes of nature.
Raju, C. K.
1991-01-01
A study of time in Newtonian physics is presented. Newton's laws of motion, falsifiability and physical theories, laws of motion and law of gravitation, and Laplace's demon are discussed. Short bibliographic sketches of Laplace and Karl Popper are included. (KR)
Síndrome de Isaacs: relato de um caso
Directory of Open Access Journals (Sweden)
Hélio Ghizoni Teive
1988-06-01
Full Text Available Relato do caso de paciente do sexo feminino com 40 anos de idade, com quadro progressivo de diminuição de força, disfonia, disfagia, dispnéia e hiperidrose. O exame físico revelava contratura em flexão das mãos, déficit de força muscular, fasciculações, mioquimia facial e pseudomiotonia nas mãos, A eletromiografia mostrou atividade elétrica contínua em repouso. O estudo histoquímico muscular revelou atrofia de fibras do tipo II, enquanto a microscopia eletrônica mostrou dilatação importante das cisternas do retículo sarcoplasmático. O diagnóstico de síndrome de Isaacs foi firmado. Excelente resposta clínica ao emprego de carbamazepina foi observada. São discutidos e revistos vários aspectos relacionados a essa rara síndrome.
Jean-Marie Dufour receives the Legion of Honour
2001-01-01
French Ambassador Philippe Petit (left) presents the cross of Knight of the Légion d'Honneur to Jean-Marie Dufour. On Friday 22 June, Jean-Marie Dufour, Head of CERN's Legal Service, was made Knight of the Legion of Honour by Ambassador Philippe Petit, at a ceremony held at the Permanent Mission of France in Geneva. Ambassador Petit is Permanent Representative of France at the United Nations and French delegate at CERN. He was awarded the decoration in recognition of his services. He has played an active part in all the great stages of CERN's development, in fact, ranging from its scientific programmes, to its establishment in its Host States, Switzerland and France, and its opening up to the wider world. The ceremony took place in the presence of Professor Luciano Maiani. The award is an honour to CERN, and the Organization takes this opportunity to convey its friendliest congratulations to Jean-Marie Dufour, a committed European.
Phenotypic spectrum of dynamin 2 mutations in Charcot-Marie-Tooth neuropathy
Claeys, Kristl G.; Züchner, Stephan; Kennerson, Marina; Berciano, José; Garcia, Antonio; Verhoeven, Kristien; Storey, Elsdon; Merory, John R.; Bienfait, Henriette M. E.; Lammens, Martin; Nelis, Eva; Baets, Jonathan; de Vriendt, Els; Berneman, Zwi N.; de Veuster, Ilse; Vance, Jefferey M.; Nicholson, Garth; Timmerman, Vincent; de Jonghe, Peter
2009-01-01
Dominant intermediate Charcot-Marie-Tooth neuropathy type B is caused by mutations in dynamin 2. We studied the clinical, haematological, electrophysiological and sural nerve biopsy findings in 34 patients belonging to six unrelated dominant intermediate Charcot-Marie-Tooth neuropathy type B
In Remembrance: Mary Frances Lyon
Indian Academy of Sciences (India)
2014-12-25
Dec 25, 2014 ... turn came I told him that I wanted to work on X-chromosome inactivation. He asked ... are many students even in 2015 who get equally excited and curious about it. The 1961 .... (a) Mary Lyon in Kyoto, Japan, 1991. (b) During ...
Indian Academy of Sciences (India)
Permanent link: https://www.ias.ac.in/article/fulltext/reso/020/08/0667-0679. Keywords. Palaeoanthropology; human evolution; Louis Leakey; Mary Leakey; Africa; Olduvai gorge; fossil hominids. Author Affiliations. Rajan Gaur1. Department of Anthropology, Panjab University, Sector 14, Chandigarh UT 160 014, India ...
Women's translations of scientific texts in the 18th century: a case study of Marie-Anne Lavoisier.
Kawashima, Keiko
2011-01-01
In the 18th century, many outstanding translations of scientific texts were done by women. These women were important mediators of science. However, I would like to raise the issue that the 'selection,' which is the process by which intellectual women chose to conduct translation works, and those 'selections' made by male translators, would not be made at the same level. For example, Émilie du Châtelet (1706-1749), the only French translator of Newton's "Principia," admitted her role as participating in important work, but, still, she was not perfectly satisfied with the position. For du Châtelet, the role as a translator was only an option under the current conditions that a female was denied the right to be a creator by society. In the case of Marie-Anne Lavoisier (1743-1794), like du Châtelet, we find an acute feeling in her mind that translation was not the work of creators. Because of her respect toward creative geniuses and her knowledge about the practical situation and concrete results of scientific studies, the translation works done by Marie-Anne Lavoisier were excellent. At the same time, the source of this excellence appears paradoxical at a glance: this excellence of translation was related closely with her low self-estimation in the field of science. Hence, we should not forget the gender problem that is behind such translations of scientific works done by women in that era. Such a possibility was a ray of light that was grasped by females, the sign of a gender that was eliminated from the center of scientific study due to social systems and norms and one of the few valuable opportunities to let people know of her own existence in the field of science.
Entropic corrections to Newton's law
International Nuclear Information System (INIS)
Setare, M R; Momeni, D; Myrzakulov, R
2012-01-01
In this short paper, we calculate separately the generalized uncertainty principle (GUP) and self-gravitational corrections to Newton's gravitational formula. We show that for a complete description of the GUP and self-gravity effects, both the temperature and entropy must be modified. (paper)
Sparse contrast-source inversion using linear-shrinkage-enhanced inexact Newton method
Desmal, Abdulla
2014-07-01
A contrast-source inversion scheme is proposed for microwave imaging of domains with sparse content. The scheme uses inexact Newton and linear shrinkage methods to account for the nonlinearity and ill-posedness of the electromagnetic inverse scattering problem, respectively. Thresholded shrinkage iterations are accelerated using a preconditioning technique. Additionally, during Newton iterations, the weight of the penalty term is reduced consistently with the quadratic convergence of the Newton method to increase accuracy and efficiency. Numerical results demonstrate the applicability of the proposed method.
Sparse contrast-source inversion using linear-shrinkage-enhanced inexact Newton method
Desmal, Abdulla; Bagci, Hakan
2014-01-01
A contrast-source inversion scheme is proposed for microwave imaging of domains with sparse content. The scheme uses inexact Newton and linear shrinkage methods to account for the nonlinearity and ill-posedness of the electromagnetic inverse scattering problem, respectively. Thresholded shrinkage iterations are accelerated using a preconditioning technique. Additionally, during Newton iterations, the weight of the penalty term is reduced consistently with the quadratic convergence of the Newton method to increase accuracy and efficiency. Numerical results demonstrate the applicability of the proposed method.
Mary Grant Seacole: the first nurse practitioner.
Messmer, P R; Parchment, Y
1998-01-01
Mary Grant Seacole was born in 1805, in Kingston, Jamaica, to a Jamaican doctress (medicine woman) and a Scottish naval officer. Later Seacole became a doctress, nursing British soldiers during epidemics of cholera, dysentery, and yellow fever in Jamaica, Cuba, and Panama. After refusals by both the British government and Florence Nightingale to be allowed to practice in Scutari, she financed her own way to the scene of the Crimean War and then established the British Hotel to serve both the comfort and medical needs of the wounded soldiers. At night, Seacole worked side by side with Nightingale at Scutari as a volunteer nurse. Seacole's fame grew proportionately after she was seen helping wounded soldiers on the battlefields even while the battles were still raging. Seacole died on May 14, 1881, in London. One hundred years later, many members of the London black community, a few members of the Nurses Association of Jamaica and the Friends of Mary Seacole marched to her grave, honoring her as one of the greatest women of all times. Mary Grant Seacole rose above the barriers of racial prejudice and demonstrated the determinism, compassion, and caring that have became the hallmark of nurse practitioners.
Newton's Principia: Myth and Reality
Smith, George
2016-03-01
Myths about Newton's Principia abound. Some of them, such as the myth that the whole book was initially developed using the calculus and then transformed into a geometric mathematics, stem from remarks he made during the priority controversy with Leibniz over the calculus. Some of the most persistent, and misleading, arose from failures to read the book with care. Among the latter are the myth that he devised his theory of gravity in order to explain the already established ``laws'' of Kepler, and that in doing so he took himself to be establishing that Keplerian motion is ``absolute,'' if not with respect to ``absolute space,'' then at least with respect to the fixed stars taken as what came later to be known as an inertial frame. The talk will replace these two myths with the reality of what Newton took himself to have established.
1998-01-23
Morinosato Wakamiya, Atsugi-shi, Kanagawa, 243-01, Japan. t present address: University of Tokyo, Institute for Industrial Science, 7-22-1 Roppongi...Lluis Sole i Sabaris 1-3, E-08028 Barcelona, Spain. 3CNM, "Instituto de Microelectrönica de Madrid", Isaac Newton 8, Parque Tecnologico de Madrid, E
Drazin, Philip
1987-01-01
Outlines the contents of Volume II of "Principia" by Sir Isaac Newton. Reviews the contributions of subsequent scientists to the physics of fluid dynamics. Discusses the treatment of fluid mechanics in physics curricula. Highlights a few of the problems of modern research in fluid dynamics. Shows that problems still remain. (CW)
Indian Academy of Sciences (India)
Admin
The word 'theory' is derived from the Greek theoria: a speculation or a view. ... In the context of these results Isaac Newton made certain fundamental ... This process is therefore referred to as the hypothetico-deductive method. .... theories, and however satisfactory they may seem from our perspective, one can never be.
Indian Academy of Sciences (India)
circles, upon which geometry is founded, belongs to mechanics. Geometry does not teach us to draw these lines, but requires them to be drawn. Sir Isaac Newton. (1643 to 1727). Figure 12. The Egyptians created right triangles from ropes divided into 12 equal segments .. 4ddress for Correspondence. Jasbir S Chahal.
ZUIDERWIJK, EJ; MARTIN, R; RAIMOND, E; VANDIEPEN, GNJ
The operation of the La Palma Data Archive is described in detail. The archive contains data taken since early 1986 with the Isaac Newton Group; 74% of the 260,000 entries are of astronomical sources. Several hundreds of queries are made on the catalog each year, resulting in approximately one
Newton Binomial Formulas in Schubert Calculus
Cordovez, Jorge; Gatto, Letterio; Santiago, Taise
2008-01-01
We prove Newton's binomial formulas for Schubert Calculus to determine numbers of base point free linear series on the projective line with prescribed ramification divisor supported at given distinct points.
Kulturní hodnoty tzv. Mariánského trojúhelníku - Sloup, Vranov, Křtiny
Bezděková, Veronika
2009-01-01
In the Moravian Karst there are three big churches consecrated to The Virgin Mary. These are visited by many pilgrims and have their own calendar of pilgrimages. They are Vranov, Křtiny and Sloup. Churches in these towns are consecrated to The Virgin Mary: Vranov commemorates the birth of The Virgin Mary, Křtiny commemorates the name of The Virgin Mary and Sloup commemorates the sufferings of The Virgin Mary. So we talk about the triangle of The Virgin Mary. This term is the main point of my ...
Three lectures on Newton's laws
Kokarev, Sergey S.
2009-01-01
Three small lectures are devoted to three Newton's laws, lying in the foundation of classical mechanics. These laws are analyzed from the viewpoint of our contemporary knowledge about space, time and physical interactions. The lectures were delivered for students of YarGU in RSEC "Logos".
Newton law on the generalized singular brane with and without 4d induced gravity
International Nuclear Information System (INIS)
Jung, Eylee; Kim, Sung-Hoon; Park, D.K.
2003-01-01
Newton law arising due to the gravity localized on the general singular brane embedded in AdS 5 bulk is examined in the absence or presence of the 4d induced Einstein term. For the RS brane, apart from the subleading correction, Newton potential obeys 4d- and 5d-type gravitational law at long- and short-ranges if it were not for the induced Einstein term. The 4d induced Einstein term generates an intermediate range at short distance, in which the 5d Newton potential 1/r 2 emerges. For Neumann brane the long-range behavior of Newton potential is exponentially suppressed regardless of the existence of the induced Einstein term. For Dirichlet brane the expression of Newton potential is dependent on the renormalized coupling constant v ren . At particular value of v ren Newton potential on Dirichlet brane exhibits a similar behavior to that on RS brane. For other values the long-range behavior of Newton potential is exponentially suppressed as that in Neumann brane
XMM-Newton operations beyond the design lifetime
Parmar, Arvind N.; Kirsch, Marcus G. F.; Muñoz, J. Ramon; Santos-Lleo, Maria; Schartel, Norbert
2012-09-01
After more than twelve years in orbit and two years beyond the design lifetime, XMM-Newton continues its near faultless operations providing the worldwide astronomical community with an unprecedented combination of imaging and spectroscopic X-ray capabilities together with simultaneous optical and ultra-violet monitoring. The interest from the scientific community in observing with XMM-Newton remains extremely high with the last annual Announcement of Observing Opportunity (AO-11) attracting proposals requesting 6.7 times more observing time than was available. Following recovery from a communications problem in 2008, all elements of the mission are stable and largely trouble free. The operational lifetime if currently limited by the amount of available hydrazine fuel. XMM-Newton normally uses reaction wheels for attitude control and fuel is only used when offsetting reaction wheel speed away from limiting values and for emergency Sun acquisition following an anomaly. Currently, the hydrazine is predicted to last until around 2020. However, ESA is investigating the possibility of making changes to the operations concept and the onboard software that would enable lower fuel consumption. This could allow operations to well beyond 2026.
Newton's Telescope in Print: the Role of Images in the Reception of Newton's Instrument
Dupré, Sven
2008-01-01
While Newton tried to make his telescope into a proof of the supremacy of his theory of colours over older theories, his instrument was welcomed as a way to shorten telescopes, not as a way to solve the problem of chromatic aberration. This paper argues that the image published together with the
Special Workshop of Marie Curie Fellows on Research and Training in Physics and Technology
Patrice Loiez
2002-01-01
Photo 0210004_1: Prof. Ugo Amaldi, University of Milano Bicocca and Tera Foundation, Italy. Addressing the Marie Curie Workshop held at CERN 3-4 October 2002. Title of this talk:"Research Developments on Medical Physics". Photo 0210004_2: Marie Curie Fellows at CERN. Participating in Marie Curie Workshop held at CERN 3-4 October 2002.
Directory of Open Access Journals (Sweden)
Sabrina Isabel C de Carvalho
2009-12-01
Full Text Available 'BRS Mari' é uma nova cultivar de pimenta dedo-de-moça desenvolvida para uso múltiplo, como produto in natura, processada na forma de molho líquido ou desidratada em flocos, moída junto com as sementes, para a produção de pimenta tipo 'calabresa'. A cv. 'BRS Mari' foi desenvolvida a partir da população 'CNPH 0039' por meio de seis ciclos de seleção massal com autofecundação controlada. A nova cultivar apresenta plantas de polinização aberta com hábito de crescimento intermediário, com aproximadamente 90 cm de altura e 1,25 m de largura, com resistência múltipla a doenças, com destaque para o virus Pepper Yellow Mosaic Virus (PepYMV e nematóide das galhas (Meloidogyne javanica, resistência mediana ao oídio (Oidium sicula, mancha bacteriana (Xanthomonas spp. e antracnose (Colletotrichum spp.. A colheita dos frutos tem início cerca de 70 dias após o transplante. Nas condições da região Centro-Oeste, 'BRS Mari' apresentou boa uniformidade de planta, ótima qualidade de fruto e grande potencial produtivo, alcançando 35 t ha-1 em seis meses, quando cultivada no espaçamento de 1 m entre plantas e 1,5 m entre linhas. Os frutos são alongados e pendentes, típicos do tipo dedo-de-moça, com passagem de coloração verde claro, amarelo com antocianina e laranja quando imaturos e vermelho intenso quando maduros, com aproximadamente 6,0 cm de comprimento, 1,4 cm de largura e cerca de 1,7 mm de espessura da parede. A principal característica da 'BRS Mari' é o elevado teor de capsaicina, aproximadamente 90.000 SHU (Unidades de Calor Scoville, mais elevado quando comparada com outras cultivares do mesmo grupo.'BRS Mari' is a new hot pepper cultivar suitable for processing as sauce or dehydrated flakes, ordinarily known in Brazil as 'calabresa' type, as well as for fresh market. Hot pepper cv. 'BRS Mari' was obtained from population 'CNPH 0039', through six cycles of mass selection with controlled selfing of selected plants. The
2016-12-01
could understand the world with flexible and deep thinking through his lessons. At last, I can understand Isaac Newton: “If I have seen further, it is...To overcome this crisis, the North Korean government got down to business with China when Wen Jiabao, who was the Premier of the People’s Republic
Reading on the Shoulders of Giants
Ben-Chaim, Michael; Riendeau, Michael
2012-01-01
Reflecting on his successful scientific career, Isaac Newton highlighted his intellectual debt to his predecessors. "If I have seen further," he wrote, "it was "only" by standing on the shoulders of giants." The authors have chosen the title of their article as a token of recognition of their debt to the teachings of…
Indian Academy of Sciences (India)
Page 1. Resonance - December 2006. Isaac Newton. (1642/43 – 1727). Regn No. CPMG/KA/BGE-340/2006-08 WPP No.6. Posted at RT Nagar Head Post Office, Bangalore 12.12.06. Registered with Registrar of Newspapers in India vide Regn. No. 66273/96. ISSN 0971-8044. Price per copy: Rs 40.
Indian Academy of Sciences (India)
Some three and a half centuries ago, Galileo Galilei declared that the book of nature was written in the language of mathematics. Isaac Newton following after him set up a comprehensive scheme for the description of physical phenomena, and aptly called it "Mathematical Principles of. Natural Philosophy". For a couple of ...
Harder–Narasimhan filtration for rank 2 tensors and stable coverings
Indian Academy of Sciences (India)
We call σ the Harder–Narasimhan section of the covering. Acknowledgements. The author wishes to thank Usha Bhosle, Tomás L Gómez and Peter Newstead for useful discussions, and to the Isaac Newton Institute for Mathematical Sciences in Cambridge,. United Kingdom, where part of this work was done, for hospitality.
Holisme as 'n postmodernistiese filosofie in teologiese lig
African Journals Online (AJOL)
mentation characteristic of the modern mind since René Decartes and Isaac Newton ....[T]he thirst for postmodernity is the thirst for a renewed sense of the whole'. Tog is die konsep 'postmodemisme' (maar ook 'postmoderniteit') nie maklik defmieerbaar nie (kyk Szegedy-Maszák 1987:42). Wat as verduidelikend daaroor ge-.
The frictional Schroedinger-Newton equation in models of wave function collapse
Energy Technology Data Exchange (ETDEWEB)
Diosi, Lajos [Research Institute for Particle and Nuclear Physics, H-1525 Budapest 114, PO Box 49 (Hungary)
2007-05-15
Replacing the Newtonian coupling G by -iG, the Schroedinger--Newton equation becomes {sup f}rictional{sup .} Instead of the reversible Schroedinger-Newton equation, we advocate its frictional version to generate the set of pointer states for macroscopic quantum bodies.
Bon appetite! / Mari-Liis Rebane
Rebane, Mari-Liis
2009-01-01
Pimedate Ööde 13. filmifestivali alafestivali Animated Dreams täispikki animafilme: Austraalia "Mary ja Max" (režissöör Elliot, Adam), Rootsi-Taani-Norra "Metropia" (režissöör Tarik Saleh), Iisraeli-Austraalia "9,99 dollarit" (režissöör Tatia Rosenthal)
Rosie Carpe and the Virgin Mary: Modelling Modern Motherhood
Directory of Open Access Journals (Sweden)
Pauline Eaton
2016-06-01
Full Text Available Marie NDiaye’s 2001 novel, Rosie Carpe, incorporates, as one of its several instances of parenting failure, the narrative of the decline of a single mother from adequacy to abuse. This narrative, which is the focus of this article, might be said to put flesh on the bones of Julia Kristeva’s deconstruction of the Virgin Mary in her 1980s essay ‘Stabat Mater’. Kristeva saw the Marian model as out of date but she interrogated its enduring power and its continuing influence on our cultural perceptions of maternity. NDiaye’s eponymous Rosie realises she is pregnant but has no idea how this has come about. Rosie is not represented as a woman who has a religious faith but she decides to accept her child as a holy miracle. This article analyses how the ‘mythology’ of the Virgin Mary, and other biblical intertext, is woven into the narrative of Rosie’s experience of motherhood, so as to counterpoint and illuminate Rosie’s bleak and raw inner experience of maternity, an experience which, while confirming that Rosie is not, and never could have been, a modern Virgin Mary nevertheless refreshes the human stories at the root of the Christian narrative.
Newton's Path to Universal Gravitation: The Role of the Pendulum
Boulos, Pierre J.
2006-01-01
Much attention has been given to Newton's argument for Universal Gravitation in Book III of the "Principia". Newton brings an impressive array of phenomena, along with the three laws of motion, and his rules for reasoning to deduce Universal Gravitation. At the centre of this argument is the famous "moon test". Here it is the empirical evidence…
Disk-galaxy density distribution from orbital speeds using Newton's law
Nicholson, Kenneth F.
2000-01-01
Given the dimensions (including thickness) of an axisymmetric galaxy, Newton's law is used in integral form to find the density distributions required to match a wide range of orbital speed profiles. Newton's law is not modified and no dark matter halos are required. The speed distributiions can have extreme shapes if they are reasonably smooth. Several examples are given.
N=2 superconformal Newton-Hooke algebra and many-body mechanics
International Nuclear Information System (INIS)
Galajinsky, Anton
2009-01-01
A representation of the conformal Newton-Hooke algebra on a phase space of n particles in arbitrary dimension which interact with one another via a generic conformal potential and experience a universal cosmological repulsion or attraction is constructed. The minimal N=2 superconformal extension of the Newton-Hooke algebra and its dynamical realization in many-body mechanics are studied.
Laboratory Test of Newton's Second Law for Small Accelerations
International Nuclear Information System (INIS)
Gundlach, J. H.; Schlamminger, S.; Spitzer, C. D.; Choi, K.-Y.; Woodahl, B. A.; Coy, J. J.; Fischbach, E.
2007-01-01
We have tested the proportionality of force and acceleration in Newton's second law, F=ma, in the limit of small forces and accelerations. Our tests reach well below the acceleration scales relevant to understanding several current astrophysical puzzles such as the flatness of galactic rotation curves, the Pioneer anomaly, and the Hubble acceleration. We find good agreement with Newton's second law at accelerations as small as 5x10 -14 m/s 2
Klassika & ekskremendid / Mari Sobolev
Sobolev, Mari, 1968-
2002-01-01
20.-21. aprillil toimus Pärnus 8. Fideo- ja Vilmifestival alapealkirjaga "Eksperimendid ja klassika". Peakorraldaja Rael Artel. Rami Raski filmist "Legowitz 1999" (soome rühmitus Vivid), läti filmist "Love, death & television", Concordia ülikooli ("Ülemus") ja Academia Grata (portreefilmid Asta Isakist, Andrus Joonasest jm.) programmist, Kadriann Kibuse ja Liina Paakspuu filmist "Urban Obsessions", Mirja-Mari Smidti ja Allan Tõnissoo videost, Marianne Männi koomiksitest kataloogis
The Mesoscale Science of the Matter-Radiation Interactions in Extremes (MaRIE) project
Energy Technology Data Exchange (ETDEWEB)
Kippen, Karen Elizabeth [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Montoya, Donald Raymond [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2017-08-17
The National Nuclear Security Administration (NNSA) requires the ability to understand and test how material structures, defects, and interfaces determine performance in extreme environments such as in nuclear weapons. To do this, MaRIE will be an x-ray source that is laser-like and brilliant with very fl exible and fast pulses to see at weapons-relevant time scales, and with high enough energy to study critical materials. The Department of Energy (DOE) has determined there is a mission need for MaRIE to deliver this capability. MaRIE can use some of the existing infrastructure of the Los Alamos Neutron Science Center (LANSCE) and its accelerator capability. MaRIE will be built as a strategic partnership of DOE national laboratories and university collaborators.
Trans-Colonial Collaboration and Slave Narrative: Mary Prince Revisited
Directory of Open Access Journals (Sweden)
Michelle Gadpaille
2011-10-01
Full Text Available In 1831 in London, two formidable women met: Mary Prince, an ex-slave from Bermuda, who had crossed the Atlantic to a qualified freedom, and Susanna Strickland, an English writer. The narrative that emerged from this meeting was The History of Mary Prince, which played a role in the fight for slave emancipation in the British Empire. Prince disappeared once the battle was won, while Strickland emigrated to Upper Canada and, as Susanna Moodie, became an often quoted 19th century Canadian writer. Prince dictated, Strickland copied, and the whole was lightly edited by Thomas Pringle, the anti-slavery publisher at whose house the meeting took place. This is the standard account. In contesting this version, the paper aims to reinstate Moodie as co-creator of the collaborative Mary Prince text by considering multiple accounts of the meeting with Prince and to place the work in the context of Moodie’s pre- and post-emigration oeuvre on both sides of the Atlantic.
Resonance – Journal of Science Education | Indian Academy of ...
Indian Academy of Sciences (India)
Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 12. Isaac Newton (1642/43-1727). Bikram Phookun. Article-in-a-Box Volume 11 Issue 12 December 2006 pp 3-6. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/011/12/0003-0006 ...
Resonance – Journal of Science Education | News
Indian Academy of Sciences (India)
Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 12. Issue front cover thumbnail Issue back cover thumbnail. Volume 11, Issue 12. December 2006, pages 1-102. pp 1-2 Editorial. Editorial · Renuka Ravindran · More Details Fulltext PDF. pp 3-6 Article-in-a-Box. Isaac Newton (1642/43-1727).
Does the Newton's world model revive
International Nuclear Information System (INIS)
Meszaros, A.
1984-03-01
Newton's world model may have a physical meaning if the gravitation has small non-zero mass and if the observable part of the universe is the interior of a giant finite body. Both possibilities are allowed theoretically. (author)
Causes of Charcot-Marie-Tooth Disease (CMT)
... Marie-Tooth Disease (CMT) Congenital Muscular Dystrophy (CMD) Duchenne Muscular Dystrophy (DMD) Emery-Dreifuss Muscular Dystrophy Endocrine Myopathies Metabolic Diseases of Muscle Mitochondrial Myopathies (MM) Myotonic Dystrophy (DM) Spinal-Bulbar ...
An experimental test of Newton's law of gravitation for small accelerations
International Nuclear Information System (INIS)
Schubert, Sven
2011-10-01
The experiment presented in this thesis has been designed to test Newton's law of gravitation in the limit of small accelerations caused by weak gravitational forces. It is located at DESY, Hamburg, and is a modification of an experiment that was carried out in Wuppertal, Germany, until 2002 in order to measure the gravitational constant G. The idea of testing Newton's law in the case of small accelerations emerged from the question whether the flat rotation curves of spiral galaxies can be traced back to Dark Matter or to a law of gravitation that deviates from Newton on cosmic scales like e.g. MOND (Modified Newtonian Dynamics). The core of this experiment is a microwave resonator which is formed by two spherical concave mirrors that are suspended as pendulums. Masses between 1 and 9 kg symmetrically change their distance to the mirrors from far to near positions. Due to the increased gravitational force the mirrors are pulled apart and the length of the resonator increases. This causes a shift of the resonance frequency which can be translated into a shift of the mirror distance. The small masses are sources of weak gravitational forces and cause accelerations on the mirrors of about 10 -10 m/s 2 . These forces are comparable to those between stars on cosmic scales and the accelerations are in the vicinity of the characteristic acceleration of MOND a 0 ∼ 1.2.10 -10 m/s 2 , where deviations from Newton's law are expected. Thus Newton's law could be directly checked for correctness under these conditions. First measurements show that due to the sensitivity of this experiment many systematic influences have to be accounted for in order to get consistent results. Newton's law has been confirmed with an accuracy of 3%. MOND has also been checked. In order to be able to distinguish Newton from MOND with other interpolation functions the accuracy of the experiment has to be improved. (orig.)
Mary Somerville and the world of science
Chapman, Allan
2015-01-01
Mary Somerville (1780-1872), after whom Somerville College Oxford was named, was the first woman scientist to win an international reputation entirely in her own right, rather than through association with a scientific brother or father. She was active in astronomy, one of the most demanding areas of science of the day, and flourished in the unique British tradition of Grand Amateurs, who paid their own way and were not affiliated with any academic institution. Mary Somerville was to science what Jane Austen was to literature and Frances Trollope to travel writing. Allan Chapman’s vivid account brings to light the story of an exceptional woman, whose achievements in a field dominated by men deserve to be very widely known.
What are the Hidden Quantum Processes Behind Newton's Laws?
Ostoma, Tom; Trushyk, Mike
1999-01-01
We investigate the hidden quantum processes that are responsible for Newton's laws of motion and Newton's universal law of gravity. We apply Electro-Magnetic Quantum Gravity or EMQG to investigate Newtonian classical physics. EQMG is a quantum gravity theory that is manifestly compatible with Cellular Automata (CA) theory, a new paradigm for physical reality. EMQG is also based on a theory of inertia proposed by R. Haisch, A. Rueda, and H. Puthoff, which we modified and called Quantum Inertia...
Radikaalsus muuseumi kaitsva teki all / Mari Sobolev
Sobolev, Mari, 1968-
2004-01-01
Rotermanni soolalaos avatud Marco (Marko) Laimre isiknäituse "Küsimused ja vastused" puhul 13. IV toimunud konverentsist. Johannes Saare, Eha Komissarovi, Hanno Soansi, Anders Härmi ja Mari Sobolevi ettekannetest
Gustave Flaubert, Charles Dickens, and Isaac Pulvermacher's "magic band".
Waits, Robert K
2013-01-01
Around 1850, Isaac L. Pulvermacher (1815-1884) joined the ranks of so-called "galvanists" who had, for nearly a century, been touting the shocks and sparks of electricity as a miracle cure for all ills, including neurological complaints such as palsy and hemiplegia. The famed authors, Gustave Flaubert (1821-1880), in France, and Charles Dickens (1812-1870), in England, although contemporaries, apparently never met or corresponded. But during their lives, they both became aware of Pulvermacher and his patented Hydro-Electric Chains, claimed to impart vigor and cure nearly every complaint. Pulvermacher's chains made a cameo appearance in Madame Bovary (1857), Flaubert's controversial (and most successful) novel. Among Dickens's last letters (1870) was an order for I. L. Pulvermacher and Company's "magic band." Since the Victorian age, electrical and magnetic cures, for better or worse, continue to be products of both the medical profession and quackery. © 2013 Elsevier B.V. All rights reserved.
Discovery Science: Newton All around You.
Prigo, Robert; Humphrey, Gregg
1993-01-01
Presents activities for helping elementary students learn about Newton's third law of motion. Several activity cards demonstrate the concept of the law of action and reaction. The activities require only inexpensive materials that can be found around the house. (SM)
On the Turn of Two Millennia (60 Years of the Mari Archaeological Expedition
Directory of Open Access Journals (Sweden)
Nikitin Valeriy V.,
2017-03-01
Full Text Available The article is dedicated to the 60th Anniversary of the Mari Archaeological Expedition and summarizes the two decades of its studies (1996-2016 into the early cultures of the Mari region, starting from the era of the original settlement (Mesolithic, through the Neolithic-Eneolithic, Bronze Age, Early Iron Age and up to the Middle Ages. The expedition studied stations and settlements of primitive cultures, as well as unfortified and fortified settlements and necropolises. Special studies focused on formation and development of the early Mari culture, as well as the material and spiritual culture of the medieval Mari. The expedition continues its survey exploration in order to identify new archaeological sites. During the reported period, twelve monographs were published and three monographs prepared based on the expedition’s materials.
Fundamentos kantianos dos axiomas do movimento de Newton
Vieira Coutinho Abreu Gomes, Írio
2006-01-01
Esse trabalho se insere na perspectiva fundacionista kantiana, particularmente no que diz respeito às três leis de Newton. Em sua obra de 1786, Princípios Metafísicos da Ciência da Natureza, Kant empreende a tarefa de fundamentar a física mecânica através de princípios metafísicos. Nosso objetivo nessa dissertação foi abordar essa obra especificamente em seu terceiro capítulo onde Kant trata dos axiomas do movimento de Newton. Nessa dissertação elucidamos a argumentação kantiana na fundamenta...
Newton's Law of Cooling Revisited
Vollmer, M.
2009-01-01
The cooling of objects is often described by a law, attributed to Newton, which states that the temperature difference of a cooling body with respect to the surroundings decreases exponentially with time. Such behaviour has been observed for many laboratory experiments, which led to a wide acceptance of this approach. However, the heat transfer…
On-the-fly XMM-Newton Spacecraft Data Reduction on the Grid
Directory of Open Access Journals (Sweden)
A. Ibarra
2006-01-01
Full Text Available We present the results of the first prototype of a XMM-Newton pipeline processing task, parallelized at a CCD level, which can be run in a Grid system. By using the Grid Way application and the XMM-Newton Science Archive system, the processing of the XMM-Newton data is distributed across the Virtual Organization (VO constituted by three different research centres: ESAC (European Space Astronomy Centre, ESTEC (the European Space research and TEchnology Centre and UCM (Complutense University of Madrid. The proposed application workflow adjusts well to the Grid environment, making use of the massive parallel resources in a flexible and adaptive fashion.
Leadership, Longevity, and Leaning In: An Interview With Mary Jo (Joey) Bulfin.
Prestia, Angela S
2018-06-01
This column profiles Mary Jo Bulfin, MBA, RN, CENP, chief executive officer of St. Mary's Medical Center, West Palm Beach, Florida. Ms Bulfin began her career as a staff nurse in the organization where she is now the CEO and discusses her career path and lessons learned.
The architecture of Newton, a general-purpose dynamics simulator
Cremer, James F.; Stewart, A. James
1989-01-01
The architecture for Newton, a general-purpose system for simulating the dynamics of complex physical objects, is described. The system automatically formulates and analyzes equations of motion, and performs automatic modification of this system equations when necessitated by changes in kinematic relationships between objects. Impact and temporary contact are handled, although only using simple models. User-directed influence of simulations is achieved using Newton's module, which can be used to experiment with the control of many-degree-of-freedom articulated objects.
Classical mechanics from Newton to Einstein : a modern introduction
McCall, Martin
2011-01-01
This new edition of Classical Mechanics, aimed at undergraduate physics and engineering students, presents in a user-friendly style an authoritative approach to the complementary subjects of classical mechanics and relativity. The text starts with a careful look at Newton's Laws, before applying them in one dimension to oscillations and collisions. More advanced applications - including gravitational orbits and rigid body dynamics - are discussed after the limitations of Newton's inertial frames have been highlighted through an exposition of Einstein's Special Relativity. Examples gi
Fine, Leon G
2003-01-01
Charles Edward Isaacs (1811-1860), an anatomist working in New York, undertook a series of studies which attempted to define the microscopic structure of the nephrons in a variety of species. Given that he published his findings 15 years after William Bowman's seminal paper on the subject, he was able to add only a few of the finer details to the picture. He observed the continuity of the epithelium of the glomerular capsule with that of the proximal tubule and he demonstrated that the glomerular tuft is covered by a layer of epithelial cells. In a series of studies on human renal function he erroneously concluded that the glomerulus must have an excretory function in addition to its filtration function and that diuretics act primarily on the glomerlus. The latter conclusion was based upon observations of substances not currently categorized as being diuretic agents. The absence of a major conceptual advance in the writings of Isaacs probably accounts for that fact that his contribution has been largely forgotten.
Esther Schor, ed. The Cambridge Companion to Mary Shelley
Directory of Open Access Journals (Sweden)
Anne BERTON
2006-06-01
Full Text Available “Today, whether she is found between staid cloth covers, in paperback, on the screen or in cyberspace, Mary Shelley is everywhere,” writes Esther Schor in her Introduction to this collection of essays (2. Interest in “the Author of Frankenstein” and of other works has grown steadily over the last twenty years, thanks notably to the publication of her Journals (The Journals of Mary Shelley, 1814-1844, ed. Paula R. Feldman and Diana Scott-Kilvert, 2 vols, Oxford: Clarendon, 1987, of her Lette...
A Line Search Multilevel Truncated Newton Algorithm for Computing the Optical Flow
Directory of Open Access Journals (Sweden)
Lluís Garrido
2015-06-01
Full Text Available We describe the implementation details and give the experimental results of three optimization algorithms for dense optical flow computation. In particular, using a line search strategy, we evaluate the performance of the unilevel truncated Newton method (LSTN, a multiresolution truncated Newton (MR/LSTN and a full multigrid truncated Newton (FMG/LSTN. We use three image sequences and four models of optical flow for performance evaluation. The FMG/LSTN algorithm is shown to lead to better optical flow estimation with less computational work than both the LSTN and MR/LSTN algorithms.
Murdin, P.
2000-11-01
Cosmologist and theoretical astrophysicist, born in Oxford, England, where he studied physics at University College. Moved to Cambridge to take up research in general relativity and cosmology, became Lucasian professor (an appointment earlier held by ISAAC NEWTON, with whom Hawking has been compared). Hawking worked to develop a valid mathematical treatment of the `singularities' in the theor...
The Music of the Spheres: Cross-Curricular Perspectives on Music and Science
Rogers, George L.
2016-01-01
The integration of music and science is embodied in the music of the spheres, the ancient concept that the universe is ordered in a manner consistent with principles of musical harmony. This idea boasts a long history, from the teachings of Pythagoras (ca. 600 BC) through Isaac Newton in the eighteenth century, and makes a fascinating…
Measuring, Understanding, and Responding to Covert Social Networks: Passive and Active Tomography
2017-11-11
Methods for generating a random sample of networks with desired properties are important tools for the analysis of social , biological, and information...on Theoretical Foundations for Statistical Network Analysis at the Isaac Newton Institute for Mathematical Sciences at Cambridge U. (organized by...Approach SOCIAL SCIENCES STATISTICS EECS Problems span three disciplines Scientific focus is needed at the interfaces
Econophysics: Past and present
de Area Leão Pereira, Eder Johnson; da Silva, Marcus Fernandes; Pereira, H. B. B.
2017-05-01
This paper provides a brief historical review of the relationship between economics and physics, beginning with Adam Smith being influenced by Isaac Newton's ideas up to the present day including the new econophysics discipline and some of the tools applied to the economy. Thus, this work is expected to motivate new researchers who are interested in this new discipline.
Mantero-Castaneda, E. A.; Hernandez-Sanchez, M.; Arce-Tord, C.; Esteban-Gutierrez, A.; Garcia-Broock, E.; Garcia-Rivas, M.; Gonzalez-Cuesta, L.; Hermosa-Munoz, L.; Jimenez-Gallardo, A.; Lopez-Navas, E.; Otero-Santos, J.; Prendin, M. G.; Rodriguez-Sanchez, M.; Perez-Fournon, I.
2017-12-01
We report the pre-discovery detection of the nova M31N 2017-11a (AT2017hvi, PTSS-17zap, TCP J00425419+4130425) with the Isaac Newton Telescope* Wide Field Camera on the night of 29 October 2017, 4.845 days before the discovery observations on 2017/11/04.695 by the PMO-Tsinghua Supernova Survey (PTSS).
Indian Academy of Sciences (India)
Volume 10 Issue 12 December 2005 pp 76-82. Dark Matter - Dark Matter in the Universe · Bikram Phookun Biman Nath · More Details Fulltext PDF. Volume 11 Issue 12 December 2006 pp 3-6 Article-in-a-Box. Isaac Newton (1642/43-1727) · Bikram Phookun · More Details Fulltext PDF. Volume 15 Issue 11 November 2010 ...
Indian Academy of Sciences (India)
his own failure to match the achievements of. Sir Isaac. I Raphson, an eminent scientist of his day and a friend of New- ton, published the method in his book Analysis Aequationum. Universalis in 1690. Newton described it in Method of Flux- ions written in 1671, but pub- lished in 1736 (l}. Keywords. Implicit function theorem,.
'Epistemology models ontology'− In gesprek met John Polkinghorne
African Journals Online (AJOL)
Test
7 Jun 2011 ... maar met die aard daarvan. Polkinghorne wil met sy boek One World (1996) presies sê wat die titel suggereer. Hiervoor kry hy die oplossing by sy mentor en latere kollega, Paul Dirac. Vir meer as 30 jaar het Dirac dieselfde leerstoel in Fisika aan Cambridge beklee as Isaac Newton (Polkinghorne 2005:34).
VizieR Online Data Catalog: Probing the Local Bubble with DIBs. III. (Farhang+, 2015)
Farhang, A.; Khosroshahi, H. G.; Javadi, A.; van Loon, J. Th.
2015-03-01
All of the observations have been obtained with the Intermediate Dispersion Spectrograph (IDS) at the 2.5m Isaac Newton Telescope at the Roque de Los Muchachos in La Palma; with spectra in the 5750-6040Å region at spectral resolutions of R~2000 (or a velocity resolution of Δv=150km/s). (1 data file).
Sanchez Ron, Jose Manuel
2015-01-01
Lecture synopsis : Having formulated his special theory of relativity (1905), Albert Einstein set about producing a relativistic theory of gravitation that differed from the venerable theory of universal gravitation described by Isaac Newton in 1687. In 1907, he found a piece in the puzzle, the equivalence principle, that would guide him to an eventual solution in 1915: general relativity.
Navodnenija v umah zactroishtshikov / Maris Kuuda
Kuuda, Maris
2007-01-01
Kohalikel omavalitsustel pole piisavalt hoobasid sundida arendajaid üleujutusohuga arvestama. Pärnusse hotelli September rajajad (arhitektid Emil Urbel, Andrus Mark) arvestavad ujutusohuga. Arvamust avaldavad Rene Reisner, Mari Sepp, Ülo Sults, Karri Tiigisoon, Indrek Rannik, Mark Soosaar, Tiiu Pärn, Merle Looring, Rita Sepp, Kaspar Alles
LENUS (Irish Health Repository)
Reilly, Mary M
2011-03-01
Charcot-Marie-Tooth (CMT) disease is the commonest inherited neuromuscular disorder affecting at least 1 in 2,500. Over the last two decades, there have been rapid advances in understanding the molecular basis for many forms of CMT with more than 30 causative genes now described. This has made obtaining an accurate genetic diagnosis possible but at times challenging for clinicians. This review aims to provide a simple, pragmatic approach to diagnosing CMT from a clinician\\'s perspective.
Variational nature, integration, and properties of Newton reaction path.
Bofill, Josep Maria; Quapp, Wolfgang
2011-02-21
The distinguished coordinate path and the reduced gradient following path or its equivalent formulation, the Newton trajectory, are analyzed and unified using the theory of calculus of variations. It is shown that their minimum character is related to the fact that the curve is located in a valley region. In this case, we say that the Newton trajectory is a reaction path with the category of minimum energy path. In addition to these findings a Runge-Kutta-Fehlberg algorithm to integrate these curves is also proposed.
Variational nature, integration, and properties of Newton reaction path
Bofill, Josep Maria; Quapp, Wolfgang
2011-02-01
The distinguished coordinate path and the reduced gradient following path or its equivalent formulation, the Newton trajectory, are analyzed and unified using the theory of calculus of variations. It is shown that their minimum character is related to the fact that the curve is located in a valley region. In this case, we say that the Newton trajectory is a reaction path with the category of minimum energy path. In addition to these findings a Runge-Kutta-Fehlberg algorithm to integrate these curves is also proposed.
Newton law in DGP brane-world with semi-infinite extra dimension
International Nuclear Information System (INIS)
Park, D.K.; Tamaryan, S.; Miao Yangang
2004-01-01
Newton potential for DGP brane-world scenario is examined when the extra dimension is semi-infinite. The final form of the potential involves a self-adjoint extension parameter α, which plays a role of an additional mass (or distance) scale. The striking feature of Newton potential in this setup is that the potential behaves as seven-dimensional in long range when α is non-zero. For small α there is an intermediate range where the potential is five-dimensional. Five-dimensional Newton constant decreases with increase of α from zero. In the short range the four-dimensional behavior is recovered. The physical implication of this result is discussed in the context of the accelerating behavior of universe
Special Workshop of Marie Curie Fellows on Research and Training in Physics and Technology.
Patrice Loiez
2002-01-01
Photo 0210008_05a: Dr, Rolf Landua (CERN) explaining to participants of the Marie Curie Workshop (held at CERN 3-4 October 2002) the ATHENA experiment and the Antiproton Decelerator. Photo 0210008_06a: Dr, Rolf Landua (CERN) explaining to participants of the Marie Curie Workshop (held at CERN 3-4 October 2002) the ATHENA experiment and the Antiproton Decelerator. Photo 0210008_08a: Dr, Rolf Landua (CERN) explaining to participants of the Marie Curie Workshop (held at CERN 3-4 October 2002) the ATHENA experiment and the Antiproton Decelerator. Photo 0210008_09a: Dr, Rolf Landua (CERN) explaining to participants of the Marie Curie Workshop (held at CERN 3-4 October 2002) the ATHENA experiment and the Antiproton Decelerator.
Newton's constant from a minimal length: additional models
International Nuclear Information System (INIS)
Sahlmann, Hanno
2011-01-01
We follow arguments of Verlinde (2010 arXiv:1001.0785 [hep-th]) and Klinkhamer (2010 arXiv:1006.2094 [hep-th]), and construct two models of the microscopic theory of a holographic screen that allow for the thermodynamical derivation of Newton's law, with Newton's constant expressed in terms of a minimal length scale l contained in the area spectrum of the microscopic theory. One of the models is loosely related to the quantum structure of surfaces and isolated horizons in loop quantum gravity. Our investigation shows that the conclusions reached by Klinkhamer regarding the new length scale l seem to be generic in all their qualitative aspects.
A Non-smooth Newton Method for Multibody Dynamics
International Nuclear Information System (INIS)
Erleben, K.; Ortiz, R.
2008-01-01
In this paper we deal with the simulation of rigid bodies. Rigid body dynamics have become very important for simulating rigid body motion in interactive applications, such as computer games or virtual reality. We present a novel way of computing contact forces using a Newton method. The contact problem is reformulated as a system of non-linear and non-smooth equations, and we solve this system using a non-smooth version of Newton's method. One of the main contribution of this paper is the reformulation of the complementarity problems, used to model impacts, as a system of equations that can be solved using traditional methods.
Teaching Newton's Third Law of Motion in the Presence of Student Preconception
Poon, C. H.
2006-01-01
The concept of interaction that underlies Newton's Laws of Motion is compared with the students' commonsense ideas of force and motion. An approach to teaching Newton's Third Law of Motion is suggested that focuses on refining the student's intuitive thinking on the nature of interaction.
POEMS in Newton's Aerodynamic Frustum
Sampedro, Jaime Cruz; Tetlalmatzi-Montiel, Margarita
2010-01-01
The golden mean is often naively seen as a sign of optimal beauty but rarely does it arise as the solution of a true optimization problem. In this article we present such a problem, demonstrating a close relationship between the golden mean and a special case of Newton's aerodynamical problem for the frustum of a cone. Then, we exhibit a parallel…
Local Convergence and Radius of Convergence for Modified Newton Method
Directory of Open Access Journals (Sweden)
Măruşter Ştefan
2017-12-01
Full Text Available We investigate the local convergence of modified Newton method, i.e., the classical Newton method in which the derivative is periodically re-evaluated. Based on the convergence properties of Picard iteration for demicontractive mappings, we give an algorithm to estimate the local radius of convergence for considered method. Numerical experiments show that the proposed algorithm gives estimated radii which are very close to or even equal with the best ones.
A different voice: Mary Hays's the Memoirs of Emma Courtney.
Sharma, A
2001-01-01
Mary Hays wrote in the decade of the 1790s, a period of intense creative flowering in England. Writing in a period enshrined to the works of the canonical Wordsworth and Coleridge, Hays explored through her Jacobinical novel, The Memoirs of Emma Courtney, the contentious relationship between self and society. Like other Jacobin women writers - Elizabeth Inchbald, Charlotte Smith and Mary Wollstonecraft - Mary Hays too used her novel to explode the insidious connection between education and gender construction. Emma Courtney is a landmark novel that wrestles with the paradigm of decorum and propriety which disallows women from voicing their aspirations. In the process, Hays merges the plots of the domestic novel of courtship and love with the novel of ideas to create a searing portrait of women's intellectual confinement and psychic dissonance in a society that only projects them in terms of their gender construction. Memoirs of Emma Courtney is a remarkable novel in its depiction of the emotional imbalance created by thwarted desire: intellectual and sexual.
Mary Catherine and Me: Building Cross-Cultural Relationships in "Post-Racial" America
Bruno, Holly Elissa
2009-01-01
In 1963, President Obama's parents could not have married legally in a number of states. Mary Catherine and the author graduated from Corning Free Academy in Corning, New York, in June 1963. The lessons they learned were wrenching: "Someone is going to get hurt." Doors that opened for the author slammed in Mary Catherine's face. Holding Mary…
Solé, D; Mallol, J; Wandalsen, G F; Aguirre, V
2010-01-01
The aim of the International Study of Asthma and Allergies in Childhood (ISAAC) was to evaluate the prevalence of symptoms of eczema among children living in different parts of Latin America. Data were from centers that participated in ISAAC Phase 3. This was a cross-sectional questionnaire survey of 93,851 schoolchildren (6 to 7 years old) from 35 centers in 14 Latin American countries and 165,917 adolescents (13 to 14 years old) from 56 centers in 17 Latin American countries. The mean prevalence of current flexural eczema in schoolchildren was 11.3%, ranging from 3.2% in Ciudad Victoria (Mexico) to 25.0% in Barranquilla (Colombia). For adolescents, the prevalence varied from 3.4% in Santo André (Brazil) to 30.2% in Barranquilla (mean prevalence, 10.6%). The mean prevalence of current symptoms of severe eczema among schoolchildren was 1.5%, ranging from 0.3% in Ciudad Victoria, Toluca, and Cuernavaca (Mexico) to 4.9% in La Habana (Cuba). For adolescents, the mean prevalence was 1.4%, ranging from 0.1% in Mexicali Valley (Mexico) to 4.2% in Santa Cruz (Bolivia). These prevalence values are among the highest observed during ISAAC Phase 3. In general, the prevalence of current symptoms of eczema was higher among the Spanish-speaking centers for both schoolchildren and adolescents. Environmental risk factors must be evaluated in order to identify potential causes for the differences observed, even in centers from the same country.
Directory of Open Access Journals (Sweden)
L.R. Viana
2009-08-01
Full Text Available Foram analisados 24 isolados bacterianos oriundos de leite e pele de búfalas (Bubalus bubalis, os quais foram previamente identificados como Rhodococcus equi com o auxílio de fenotipia concisa. Testes fenotípicos complementares e ferramentas moleculares foram utilizados com o objetivo de caracterizar esses isolados, bem como diferenciá-los de outros microrganismos intimamente relacionados. Observaram-se três fenótipos distintos, porém a identificação dos isolados foi inconclusiva. Apenas um dos isolados foi comprovado como sendo R. equi com a realização da PCR espécie-específica, sequenciamento e análise dos fragmentos de DNA. Os demais isolados só foram identificados pelo sequenciamento de fragmento do gene que codifica a região 16S do rRNA universal de bactérias, indicando tratar-se de Dietzia maris. O perfil de susceptibilidade aos antimicrobianos revelou maior resistência dos isolados de D. maris para oxacilina (96% e rifampicina (87%. O isolado de R. equi apresentou resistência à amicacina, oxacilina, penicilina, rifampicina e tetraciclina. Alerta-se para o risco da incorreta identificação dos isolados baseados em testes fenotípicos concisos e para a necessidade de utilização de testes complementares para diferenciação entre R. equi e D. maris.Twenty-four bacterial isolates from milk and skin of buffalo females (Bubalus bubalis, which previously had been identified as Rhodococcus equi by using a restricted number of phenotypical tests for bacterial characterization, were analyzed. The goal of this study was to perform the characterization of these isolates, as well as the differentiation of other microorganisms closely related by using additional phenotypical tests and molecular tools. Based on the phenotypical results, three different biotypes were obtained. However, the identification of the isolates was inconclusive. Only one of the isolates was confirmed as R. equi by the PCR specifically for this species, as
The Cooling Law and the Search for a Good Temperature Scale, from Newton to Dalton
Besson, Ugo
2011-01-01
The research on the cooling law began with an article by Newton published in 1701. Later, many studies were performed by other scientists confirming or confuting Newton's law. This paper presents a description and an interpretation of Newton's article, provides a short overview of the research conducted on the topic during the 18th century, and…
The Schrödinger–Newton equation and its foundations
International Nuclear Information System (INIS)
Bahrami, Mohammad; Großardt, André; Donadi, Sandro; Bassi, Angelo
2014-01-01
The necessity of quantising the gravitational field is still subject to an open debate. In this paper we compare the approach of quantum gravity, with that of a fundamentally semi-classical theory of gravity, in the weak-field non-relativistic limit. We show that, while in the former case the Schrödinger equation stays linear, in the latter case one ends up with the so-called Schrödinger–Newton equation, which involves a nonlinear, non-local gravitational contribution. We further discuss that the Schrödinger–Newton equation does not describe the collapse of the wave-function, although it was initially proposed for exactly this purpose. Together with the standard collapse postulate, fundamentally semi-classical gravity gives rise to superluminal signalling. A consistent fundamentally semi-classical theory of gravity can therefore only be achieved together with a suitable prescription of the wave-function collapse. We further discuss, how collapse models avoid such superluminal signalling and compare the nonlinearities appearing in these models with those in the Schrödinger–Newton equation. (paper)
Mary Abigail Dodge: Journalist & Anti-Feminist.
Beasley, Maurine
Mary Abigail Dodge, a Washington, D.C., correspondent before and after the United States Civil War, was one of the most acclaimed women journalists of the nineteenth century. Unknown today, Dodge wrote on politics, religion, and contemporary issues for newspapers and magazines and commented prolifically on the role of women in society. After…
Leveraging Social Media Data to Understand Disaster Resilience: A Case Study of Hurricane Isaac
Zou, L.; Lam, N.; Cai, H.
2017-12-01
Coastal communities are facing multiple threats from natural hazards, such as hurricanes, flooding, and storm surge, and show uneven response and recovery behaviors. To build a sustainable coast, it is critical to understand how coastal hazards affect humans and how to enhance disaster resilience. However, understanding community resilience remains challenging, due to the lack of real-time data describing community's response and recovery behaviors during disasters. Public discussion through social media platforms provides an opportunity to understand these behaviors by categorizing real-time social media data into three main phases of emergency management - preparedness, response, and recovery. This study analyzes the spatial-temporal patterns of Twitter use and content during Hurricane Isaac, which struck coastal Louisiana on August 29, 2012. The study area includes counties affected by Hurricane Isaac in Louisiana and Mississippi. The objectives are three-fold. First, we will compute a set of Twitter indices to quantify the Twitter activities during Hurricane Issac and the results will be compared with those of Hurricane Sandy to gain a better understanding of human response in extreme events. Second, county-level disaster resilience in the affected region will be computed and evaluated using the Resilience Inference Measurement (RIM) model. Third, we will examine the relationship between the geographical and social disparities in Twitter use and the disparities in disaster resilience and evaluate the role of Twitter use in disaster resilience. Knowledge gained from this study could provide valuable insights into strategies for utilizing social media data to increase resilience to disasters.
TOURISM PLANNING OPPORTUNITIES FOR THE SALT LAKES OF OCNELE MARI AND OCNIŢA
Directory of Open Access Journals (Sweden)
POPESCU ANTOANETA-CARINA
2012-03-01
Full Text Available Tourism Planning Opportunities for The Salt Lakes of Ocnele Mari and Ocniţa. Ocnele Mari used to be a popular balneal tourism destination in the Southern region of Romania, Oltenia. Due to the hilly climate and the two balneal establishments of Ocnele Mari and Ocniţa, tourists could find the necessary natural cure factors for rheumatic and cardiovascular diseases. However, the salt from Ocnele Mari was also used for industrial purposes, being extracted through solution mining, which proved to be detrimental to the environment. Salt underground dissolution caused land subsidence and landslide in the area, together with the formation of large salt lakes. Security became an issue, the number of tourists diminished and the balneal equipment became obsolete because of lack of modernization investment. Under these circumstances, on the basis of field work, we have reached the conclusion that a better planning of the resort and of the salt lakes would contribute to the economic development of the region.
Anisotropic harmonic oscillator, non-commutative Landau problem and exotic Newton-Hooke symmetry
International Nuclear Information System (INIS)
Alvarez, Pedro D.; Gomis, Joaquim; Kamimura, Kiyoshi; Plyushchay, Mikhail S.
2008-01-01
We investigate the planar anisotropic harmonic oscillator with explicit rotational symmetry as a particle model with non-commutative coordinates. It includes the exotic Newton-Hooke particle and the non-commutative Landau problem as special, isotropic and maximally anisotropic, cases. The system is described by the same (2+1)-dimensional exotic Newton-Hooke symmetry as in the isotropic case, and develops three different phases depending on the values of the two central charges. The special cases of the exotic Newton-Hooke particle and non-commutative Landau problem are shown to be characterized by additional, so(3) or so(2,1) Lie symmetry, which reflects their peculiar spectral properties
Initiation and propagation of neurodegeneration.
Haass, Christian
2010-11-01
Although substantial progress has been made in understanding the molecular and pathological bases of neurodegeneration, there have been few successes in the clinic and a number of fundamental questions remain unanswered. Is this skepticism misplaced, or do the words of Sir Isaac Newton hold true, that "what we know is a drop, what we don't know is an ocean"?
Bright Not Broken: Gifted Kids, ADHD, and Autism
Kennedy, Diane M.; Banks, Rebecca S.; Grandin, Temple
2011-01-01
The future of our society depends on our gifted children--the population in which we'll find our next Isaac Newton, Albert Einstein, or Virginia Woolf. Yet the gifts and talents of some of our most brilliant kids may never be recognized because these children fall into a group known as twice exceptional, or "2e." Twice exceptional kids are both…
Arce-Tord, C.; Esteban-Gutierrez, A.; Garcia-Broock, E.; Garcia-Rivas, M.; Gonzalez-Cuesta, L.; Hermosa-Muñoz, L.; Hernandez-Sanchez, M.; Jimenez-Gallardo, A.; Lopez-Navas, E.; Mantero-Castañeda, E. A.; Otero-Santos, J.; Prendin, M. G.; Rodriguez-Sanchez, M.; Perez-Fournon, I.
2017-12-01
We report photometry in the Sloan g (3x150s), r (3x100s), and i (3x100s) bands of the recurrent nova candidate M31N 1966-08a = 1968-10c (= PNV J00412371+4114594) from observations with the Wide Field Camera of the Isaac Newton Telescope* on the night of 28 October 2017.
Practical Partnerships--Standing on the Shoulders of Scientists
Thorley, Charlotte
2009-01-01
"If I have seen further, it is because I have stood upon the shoulders of giants." Whenever the author hears this quote from Isaac Newton, she thinks about the work being done by the Royal Society in schools throughout the country, bringing science to life for their students. Much of it is also cutting edge, and represents the best of…
Vaduvescu, Ovidiu; Aznar Macias, Amadeo
2018-01-01
The near-Earth asteroid (NEA) 1993 RA was observed with the 2.5-m Isaac Newton Telescope (INT) in full Moon conditions for 8h total during three successive nights (2017 Oct 3-6). The composite lightcurve could be fit by a 3-order period P = 5.64 ± 0.01 h with amplitude of 0.13 mag; other solutions are possible.
Transforming White Light into Rainbows: Segmentation Strategies for Successful School Tax Elections
Senden, J. Bradford; Lifto, Don E.
2009-01-01
In the late 1600s, British physicist Sir Isaac Newton first demonstrated refraction and dispersion in a triangular prism. He discovered that a prism could decompose white light into a spectrum. Hold a prism up to the light at the correct angle and white light magically splits into vivid colors of the rainbow! So what do prisms and rainbows have to…
2000
A force is a push or a pull. In All About Forces and Gravity, kids will join our host on a parasailing adventure to investigate how forces impact and shape everything that happens in the world around us. Learn about gravity and the work of Sir Isaac Newton, the English scientists whose scientific principles forever changed the way people looked at…
Fu, Yongqing; Li, Xingyuan; Li, Yanan; Yang, Wei; Song, Hailiang
2013-03-01
Chaotic communication has aroused general interests in recent years, but its communication effect is not ideal with the restriction of chaos synchronization. In this paper a new chaos M-ary digital modulation and demodulation method is proposed. By using region controllable characteristics of spatiotemporal chaos Hamilton map in phase plane and chaos unique characteristic, which is sensitive to initial value, zone mapping method is proposed. It establishes the map relationship between M-ary digital information and the region of Hamilton map phase plane, thus the M-ary information chaos modulation is realized. In addition, zone partition demodulation method is proposed based on the structure characteristic of Hamilton modulated information, which separates M-ary information from phase trajectory of chaotic Hamilton map, and the theory analysis of zone partition demodulator's boundary range is given. Finally, the communication system based on the two methods is constructed on the personal computer. The simulation shows that in high speed transmission communications and with no chaos synchronization circumstance, the proposed chaotic M-ary modulation and demodulation method has outperformed some conventional M-ary modulation methods, such as quadrature phase shift keying and M-ary pulse amplitude modulation in bit error rate. Besides, it has performance improvement in bandwidth efficiency, transmission efficiency and anti-noise performance, and the system complexity is low and chaos signal is easy to generate.
Potential hosts for Lambertella corni-maris and Phacidium lacerum within the family Rosaceae
Two fungi were described in 2015 and 2016 as pathogens of pome fruit in the Pacific Northwest USA: Lambertella corni-maris on apple (Malus domestica), and Phacidium lacerum (synonym, Ceuthospora pinastri) on apple and d’Anjou pear (Pyrus communis). We documented pathogenicity of L. corni-maris to d...
Williams, C
2001-01-01
While thorough investigation of many aspects of contemporary scientific developments and Mary Shelley's personal history have provided illuminating contexts for the study of Frankenstein, the activities of the Royal Humane Society, and other bodies and individuals who pioneered and publicized resuscitation techniques, have been comparatively neglected. Here we find a richly documented, highly conspicuous area of scientific endeavour, which generated much excitement in life and literature from the last quarter of the eighteenth century onwards. There are three major points of contact with Frankenstein: Victor Frankenstein's revival of dead tissue to make his creature; the frequent occurrences of unconsciousness and asphyxia, both in the novel and in Mary Shelley's family during the period leading up to its composition, and the widely differing degrees of competence and success with which they are treated; and the possibility that resuscitative techniques were used to revive Mary Shelley's mother, Mary Wollstonecraft, after a suicide attempt. The impact on Frankenstein of Mary Shelley's lifelong distress at the role she played in bringing about her mother's death in childbirth has been thoroughly canvassed by other critics, notably Anne Mellor, but the thought that Mary Shelley, who was herself conceived after her mother's second suicide attempt, might be, in a sense, a child of the dead adds a further turn to the Gothic screw. This study traces a hitherto unexplored intersection between Mary Shelley's first novel and her family history, as well as showing how it launches a formidable attack on the shady ethics and inconsiderate arrogance of some early resuscitators.
Mohammad, Y; Shaaban, R; Hassan, M; Yassine, F; Mohammad, S; Tessier, J F; Ellwood, P
2014-11-01
The association between environmental tobacco smoke (ETS) and asthma symptoms is well documented, but a causal relationship is inconclusive. International Study of Asthma and Allergies in Childhood (ISAAC) Phase Three was the first to report a dose-response relationship between current wheezing and exposure to parental cigarette smoke. As exposure of children to water pipe (narghile) smoke is of concern in Syria, in the ISAAC Phase Three Tartous Centre we also examined the role of parental smoking of the narghile. Parents of children aged 6-7 years completed core written questionnaires about the prevalence of symptoms, and an environmental questionnaire for other risk factors, including parental cigarette smoking. We added questions about narghile to the questionnaire. Among 2 734 pupils (49% females) surveyed, we found an association between exposure to ETS of the mother smoking cigarette or narghile and ever wheezing, nocturnal cough and severe wheeze; however, the strongest association was found when the mother smoked narghile. Mother smoking narghile was also associated with exercise wheeze. Father smoking narghile, but not cigarettes, was associated with nocturnal cough, severe wheeze and exercise wheeze. The association with current wheeze became significant when mother smoked both cigarettes and narghile; however, the effect was addititive and not synergic. We recommend that international studies investigating ETS include questions on narghile smoking.
Newton, Goethe and the process of perception: an approach to design
Platts, Jim
2006-06-01
Whereas Newton traced a beam of white light passing through a prism and fanning out into the colours of the rainbow as it was refracted, Goethe looked through a prism and was concerned with understanding what his eye subjectively saw. He created a sequence of experiments which produced what appeared to be anomalies in Newton's theory. What he was carefully illustrating concerns limitations accepted when following a scientifically objective approach. Newton was concerned with the description of 'facts' derived from the analysis of observations. Goethe was concerned with the synthesis of meaning. He then went on to describe subjective techniques for training 'the mind's eye' to work efficiently in the subjective world of the imagination. Derided as 'not science', what he was actually describing is the skill which is central to creative design.
Aspectos históricos da visita de Marie Sklodowska Curie a Belo Horizonte
Directory of Open Access Journals (Sweden)
Cássius Klay Nascimento
2011-01-01
Full Text Available In the year 2011 it is celebrated the Marie Sklodowska Curie Nobel Prize centenary and the International Year of Chemistry. However, it is not generally known that Marie Sklodowska Curie, one of the greatest scientists of all time, visited Belo Horizonte, state of Minas Gerais, Brazil. She arrived by train at Belo Horizonte city on 16 August 1926, coming from Rio de Janeiro and accompanied by her daughter Irène Joliot-Curie. The scientists visited the Institute of Radium of Belo Horizonte. The approach in this work emphasizes the presence of Marie Sklodowska Curie in Belo Horizonte, exploring the admiration and respect that people had for her.
‘Het witte spook van Mesdag’. De bruid van Matthijs Maris opnieuw bezien’
Bionda, R.W.A.
2013-01-01
The Bride (1867-'68) by Matthijs Maris in The Mesdag Collection is without doubt one of his most intriguing early works. Though he defensively described it as only a 'sketch' which he could not bring to a satisfying end, Maris considered this fairly large piece as quite important. Regardless of its
75 FR 51945 - Safety Zone; Potomac River, St. Mary's River, St. Inigoes, MD
2010-08-24
...-AA00 Safety Zone; Potomac River, St. Mary's River, St. Inigoes, MD AGENCY: Coast Guard, DHS. ACTION... of the St. Mary's River, a tributary of the Potomac River. This action is necessary to provide for.... Navy helicopter located near St. Inigoes, Maryland. This safety zone is intended to protect the...
Friendship in the Life and Work of Mary Wollstonecraft: The Making of a Liberal Feminist Tradition
DEFF Research Database (Denmark)
Pedersen, Joyce Senders
2008-01-01
Mary Wollstonecrafts venskaber placeres indenfor en liberal fortolkningstradition . Udgivelsesdato: Spring 2008......Mary Wollstonecrafts venskaber placeres indenfor en liberal fortolkningstradition . Udgivelsesdato: Spring 2008...
One hundred years of pressure hydrostatics from Stevin to Newton
Chalmers, Alan F
2017-01-01
This monograph investigates the development of hydrostatics as a science. In the process, it sheds new light on the nature of science and its origins in the Scientific Revolution. Readers will come to see that the history of hydrostatics reveals subtle ways in which the science of the seventeenth century differed from previous periods. The key, the author argues, is the new insights into the concept of pressure that emerged during the Scientific Revolution. This came about due to contributions from such figures as Simon Stevin, Pascal, Boyle and Newton. The author compares their work with Galileo and Descartes, neither of whom grasped the need for a new conception of pressure. As a result, their contributions to hydrostatics were unproductive. The story ends with Newton insofar as his version of hydrostatics set the subject on its modern course. He articulated a technical notion of pressure that was up to the task. Newton compared the mathematical way in hydrostatics and the experimental way, and sided with t...
Newton Decatur AL water sample polyfluor compound discovery
U.S. Environmental Protection Agency — All the pertinent information for recreation of the published (hopefully) tables and figures. This dataset is associated with the following publication: Newton, S.,...
Directory of Open Access Journals (Sweden)
Agung Wahyu Nurcahyo
2017-07-01
Full Text Available The purpose of this study was to describe the increase in problem-solving abilities Newton's laws of motion and students' perceptions of cooperative problem solving (CPS learning. Analysis of the data is based on the student's written answers to the five problems, the results of questionnaires and interviews. This study concluded that: (1 learning CPS make a strong impact (d-effect size = 1.81 to increase problem-solving ability of students Newton's laws of motion, (2 cooperation in the learning group CPS makes the problem easier to solve and misconceptions can be corrected. Tujuan penelitian ini adalah mendeskripsikan peningkatan kemampuan pemecahan masalah hukum gerak Newton, kesulitan yang dialami, dan persepsi mahasiswa terhadap pembelajaran cooperative problem solving (CPS. Analisa data didasarkan pada jawaban tertulis mahasiswa terhadap lima permasalahan, hasil angket dan wawancara. Penelitian ini berkesimpulan bahwa (1 pembelajaran CPS memberikan dampak yang kuat (d-effect size=1,81 terhadap peningkatan kemampuan pemecahan masalah hukum gerak Newton mahasiswa dan (2 kerjasama kelompok dalam pembelajaran CPS membuat permasalahan lebih mudah dipecahkan dan miskonsepsi dapat diperbaiki.
A Fast Newton-Shamanskii Iteration for a Matrix Equation Arising from M/G/1-Type Markov Chains
Directory of Open Access Journals (Sweden)
Pei-Chang Guo
2017-01-01
Full Text Available For the nonlinear matrix equations arising in the analysis of M/G/1-type and GI/M/1-type Markov chains, the minimal nonnegative solution G or R can be found by Newton-like methods. We prove monotone convergence results for the Newton-Shamanskii iteration for this class of equations. Starting with zero initial guess or some other suitable initial guess, the Newton-Shamanskii iteration provides a monotonically increasing sequence of nonnegative matrices converging to the minimal nonnegative solution. A Schur decomposition method is used to accelerate the Newton-Shamanskii iteration. Numerical examples illustrate the effectiveness of the Newton-Shamanskii iteration.
Application of Quasi-Newton methods to the analysis of axisymmetric pressure vessels
International Nuclear Information System (INIS)
Parisi, D.A.C.
1987-01-01
This work studies the application of Quasi-Newton techniques to material nonlinear analysis of axisymmetrical pressure vessels by the finite element method. In the formulation the material bahavior is described by an isotropic elastoplastic model with strain hardening. The continum is discretized through triangular finite elements of axisymmetrical solids with linear interpolation of the displacement field. The incremental governing equations are derived by the virtual work. The solution of the system of simultaneous nonlinear equations is solved iteratively by the Quasi-Newton method employing the BFGS update. The numerical performance of the proposed method is compared with the Newton-Raphson method and some of its variants through some selected examples. (author) [pt
The seminal role played by Pierre Marie in Neurology and Internal Medicine
Directory of Open Access Journals (Sweden)
Gustavo M Almeida
2015-10-01
Full Text Available The authors review the most important contributions of Pierre Marie to the elucidation and description of several neurological diseases, such as Charcot-Marie-Tooth’s disease and hereditary cerebellar ataxia, as well as his contributions to Internal Medicine, including his pioneering studies on acromegaly, ankylosing spondylitis, and hypertrophic pulmonary osteoarthropathy. His works led to incontestable advances in the medical sciences that transcended his time.
Magnetic Levitation and Newton's Third Law
Aguilar, Horacio Munguia
2007-01-01
Newton's third law is often misunderstood by students and even their professors, as has already been pointed out in the literature. Application of the law in the context of electromagnetism can be especially problematic, because the idea that the forces of "action" and "reaction" are equal and opposite independent of the medium through which they…
The importance of being equivalent: Newton's two models of one-body motion
Pourciau, Bruce
2004-05-01
As an undergraduate at Cambridge, Newton entered into his "Waste Book" an assumption that we have named the Equivalence Assumption (The Younger): "If a body move progressively in some crooked line [about a center of motion] ..., [then this] crooked line may bee conceived to consist of an infinite number of streight lines. Or else in any point of the croked line the motion may bee conceived to be on in the tangent". In this assumption, Newton somewhat imprecisely describes two mathematical models, a "polygonal limit model" and a "tangent deflected model", for "one-body motion", that is, for the motion of a "body in orbit about a fixed center", and then claims that these two models are equivalent. In the first part of this paper, we study the Principia to determine how the elder Newton would more carefully describe the polygonal limit and tangent deflected models. From these more careful descriptions, we then create Equivalence Assumption (The Elder), a precise interpretation of Equivalence Assumption (The Younger) as it might have been restated by Newton, after say 1687. We then review certain portions of the Waste Book and the Principia to make the case that, although Newton never restates nor even alludes to the Equivalence Assumption after his youthful Waste Book entry, still the polygonal limit and tangent deflected models, as well as an unspoken belief in their equivalence, infuse Newton's work on orbital motion. In particular, we show that the persuasiveness of the argument for the Area Property in Proposition 1 of the Principia depends crucially on the validity of Equivalence Assumption (The Elder). After this case is made, we present the mathematical analysis required to establish the validity of the Equivalence Assumption (The Elder). Finally, to illustrate the fundamental nature of the resulting theorem, the Equivalence Theorem as we call it, we present three significant applications: we use the Equivalence Theorem first to clarify and resolve questions
A comparison of different quasi-newton acceleration methods for partitioned multi-physics codes
CSIR Research Space (South Africa)
Haelterman, R
2018-02-01
Full Text Available & structures, 88/7, pp. 446–457 (2010) 8. J.E. Dennis, J.J. More´, Quasi-Newton methods: motivation and theory. SIAM Rev. 19, pp. 46–89 (1977) A Comparison of Quasi-Newton Acceleration Methods 15 9. J.E. Dennis, R.B. Schnabel, Least Change Secant Updates... Dois Metodos de Broyden. Mat. Apl. Comput. 1/2, pp. 135– 143 (1982) 25. J.M. Martinez, A quasi-Newton method with modification of one column per iteration. Com- puting 33, pp. 353–362 (1984) 26. J.M. Martinez, M.C. Zambaldi, An Inverse Column...
A bust of Marie Sklodowska Curie at CERN
CERN PhotoLab
1979-01-01
The Polish Deputy Minister of Energy and Nuclear Power, J. Felicki, presented the Directors General with a bust of Mme Marie Sklodowska Curie on behalf of physicists of Poland (CERN Courier 19 (1979) 164).
Ämari baas sobib USA-le ja brittidele
2013-01-01
Eelmisel nädalal Eestit külastanud USA ja Ühendkuningriigi sõjalised esindajad NATO juures kindralleitnandid David R. Hogg ja Christopher Harper kinnitasid, et on valmis oma lennukeid Ämari baasist opereerima
Brunwasser, Steven M; Gebretsadik, Tebeb; Gold, Diane R; Turi, Kedir N; Stone, Cosby A; Datta, Soma; Gern, James E; Hartert, Tina V
2018-01-01
The International Study of Asthma and Allergies in Children (ISAAC) Wheezing Module is commonly used to characterize pediatric asthma in epidemiological studies, including nearly all airway cohorts participating in the Environmental Influences on Child Health Outcomes (ECHO) consortium. However, there is no consensus model for operationalizing wheezing severity with this instrument in explanatory research studies. Severity is typically measured using coarsely-defined categorical variables, reducing power and potentially underestimating etiological associations. More precise measurement approaches could improve testing of etiological theories of wheezing illness. We evaluated a continuous latent variable model of pediatric wheezing severity based on four ISAAC Wheezing Module items. Analyses included subgroups of children from three independent cohorts whose parents reported past wheezing: infants ages 0-2 in the INSPIRE birth cohort study (Cohort 1; n = 657), 6-7-year-old North American children from Phase One of the ISAAC study (Cohort 2; n = 2,765), and 5-6-year-old children in the EHAAS birth cohort study (Cohort 3; n = 102). Models were estimated using structural equation modeling. In all cohorts, covariance patterns implied by the latent variable model were consistent with the observed data, as indicated by non-significant χ2 goodness of fit tests (no evidence of model misspecification). Cohort 1 analyses showed that the latent factor structure was stable across time points and child sexes. In both cohorts 1 and 3, the latent wheezing severity variable was prospectively associated with wheeze-related clinical outcomes, including physician asthma diagnosis, acute corticosteroid use, and wheeze-related outpatient medical visits when adjusting for confounders. We developed an easily applicable continuous latent variable model of pediatric wheezing severity based on items from the well-validated ISAAC Wheezing Module. This model prospectively associates with
Twisted Acceleration-Enlarged Newton-Hooke Hopf Algebras
International Nuclear Information System (INIS)
Daszkiewicz, M.
2010-01-01
Ten Abelian twist deformations of acceleration-enlarged Newton-Hooke Hopf algebra are considered. The corresponding quantum space-times are derived as well. It is demonstrated that their contraction limit τ → ∞ leads to the new twisted acceleration-enlarged Galilei spaces. (author)
The cooling law and the search for a good temperature scale, from Newton to Dalton
International Nuclear Information System (INIS)
Besson, Ugo
2011-01-01
The research on the cooling law began with an article by Newton published in 1701. Later, many studies were performed by other scientists confirming or confuting Newton's law. This paper presents a description and an interpretation of Newton's article, provides a short overview of the research conducted on the topic during the 18th century, and discusses the relationships between the research on cooling laws and the definition of a temperature scale, as it was treated in Newton's article and in the work of Dalton, including Dalton's search for the absolute zero of temperature. It is shown that these scientists considered the exponential cooling law as a fundamental principle rather than a conjecture to be tested by means of experiments. The faith in the simplicity of natural laws and the spontaneous idea of proportionality between cause and effect seem to have strongly influenced Newton and Dalton. The topic is developed in a way that can be suitable for both undergraduate students and general physicists.
Newton solution of inviscid and viscous problems
International Nuclear Information System (INIS)
Venkatakrishnan, V.
1988-01-01
The application of Newton iteration to inviscid and viscous airfoil calculations is examined. Spatial discretization is performed using upwind differences with split fluxes. The system of linear equations which arises as a result of linearization in time is solved directly using either a banded matrix solver or a sparse matrix solver. In the latter case, the solver is used in conjunction with the nested dissection strategy, whose implementation for airfoil calculations is discussed. The boundary conditions are also implemented in a fully implicit manner, thus yielding quadratic convergence. Complexities such as the ordering of cell nodes and the use of a far field vortex to correct freestream for a lifting airfoil are addressed. Various methods to accelerate convergence and improve computational efficiency while using Newton iteration are discussed. Results are presented for inviscid, transonic nonlifting and lifting airfoils and also for laminar viscous cases. 17 references
Marie Sklodowska-Curie, polonium, radium and radiochemistry
International Nuclear Information System (INIS)
Guillaumont, R.
2011-01-01
In this work, the author describes how the methodology developed by Marie Curie in discovering polonium and radium has contributed to greater scientific discoveries and how these discoveries have played a great part in the development of science in general and have particularly enriched chemistry. (O.M.)
An experimental test of Newton's law of gravitation for small accelerations
Energy Technology Data Exchange (ETDEWEB)
Schubert, Sven
2011-10-15
The experiment presented in this thesis has been designed to test Newton's law of gravitation in the limit of small accelerations caused by weak gravitational forces. It is located at DESY, Hamburg, and is a modification of an experiment that was carried out in Wuppertal, Germany, until 2002 in order to measure the gravitational constant G. The idea of testing Newton's law in the case of small accelerations emerged from the question whether the flat rotation curves of spiral galaxies can be traced back to Dark Matter or to a law of gravitation that deviates from Newton on cosmic scales like e.g. MOND (Modified Newtonian Dynamics). The core of this experiment is a microwave resonator which is formed by two spherical concave mirrors that are suspended as pendulums. Masses between 1 and 9 kg symmetrically change their distance to the mirrors from far to near positions. Due to the increased gravitational force the mirrors are pulled apart and the length of the resonator increases. This causes a shift of the resonance frequency which can be translated into a shift of the mirror distance. The small masses are sources of weak gravitational forces and cause accelerations on the mirrors of about 10{sup -10} m/s{sup 2}. These forces are comparable to those between stars on cosmic scales and the accelerations are in the vicinity of the characteristic acceleration of MOND a{sub 0} {approx} 1.2.10{sup -10} m/s{sup 2}, where deviations from Newton's law are expected. Thus Newton's law could be directly checked for correctness under these conditions. First measurements show that due to the sensitivity of this experiment many systematic influences have to be accounted for in order to get consistent results. Newton's law has been confirmed with an accuracy of 3%. MOND has also been checked. In order to be able to distinguish Newton from MOND with other interpolation functions the accuracy of the experiment has to be improved. (orig.)
An evaluation of nodalization/decay heat/ volatile fission product release models in ISAAC code
Energy Technology Data Exchange (ETDEWEB)
Song, Yong Mann; Park, Soo Yong; Kim, Dong Ha
2003-03-01
An ISAAC computer code, which was developed for a Level-2 PSA during 1995, has developed mainly with fundamental models for CANDU-specific severe accident progression and also the accident-analyzing experiences are limited to Level-2 PSA purposes. Hence the system nodalization model, decay model and volatile fission product release model, which are known to affect fission product behavior directly or indirectly, are evaluated to both enhance understanding for basic models and accumulate accident-analyzing experiences. As a research strategy, sensitivity studies of model parameters and sensitivity coefficients are performed. According to the results from core nodalization sensitivity study, an original 3x3 nodalization (per loop) method which groups horizontal fuel channels into 12 representative channels, is evaluated to be sufficient for an optimal scheme because detailed nodalization methods have no large effect on fuel thermal-hydraulic behavior, total accident progression and fission product behavior. As ANSI/ANS standard model for decay heat prediction after reactor trip has no needs for further model evaluation due to both wide application on accident analysis codes and good comparison results with the ORIGEN code, ISAAC calculational results of decay heat are used as they are. In addition, fission product revaporization in a containment which is caused by the embedded decay heat, is demonstrated. The results for the volatile fission product release model are analyzed. In case of early release, the IDCOR model with an in-vessel Te release option shows the most conservative results and for the late release case, NUREG-0772 model shows the most conservative results. Considering both early and late release, the IDCOR model with an in-vessel Te bound option shows mitigated conservative results.
Kurismaa, Mari, 1956-
2011-01-01
Tallinnas Sütiste tee 19 asuva haigla juurdeehitise sisekujundusest. Sisearhitekt Mari Kurismaa (Stuudio Kurismaa OÜ). Arhitektid Indrek Suigusaar, Vivian Oruvee (AB Pluss OÜ). Infograafika autor Mari Kaljuste
De las Leyes de Newton a la Guerra de Troya
Plastino, Ángel Ricardo
2014-01-01
La publicación en 1687 del libro Philosophia Naturalis Principia Mathematica por Issac Newton marcó un importante hito en la historia del pensamiento humano. Sobre la base de tres sencillos principios de movimiento y de la ley de gravitación universal, y mediante razonamientos matemáticos, Newton logró explicar y unificar dentro de un esquema conceptual coherente una gran cantidad de fenómenos naturales: el movimiento de los planetas, las mareas, la forma de la Tierra, entre otros. Más aún, N...
ReUse Republic annab mõistele "uuskasutus" uue tähenduse / Tanel Veenre, Mari Klein
Veenre, Tanel, 1977-
2009-01-01
Moe- ja disainiagentuuri KalaMari uuest kaubamärgist ReUse Republic. Tegu on seisma jäänud brändirõivaste ümberdisainimise ja (uus)kasutusega. Projekti looja Mari Martin, kaasatud 15 eesti disainerit
DEFF Research Database (Denmark)
Melluso, Leone; Sheth, Hetu C.; Mahoney, John J.
2009-01-01
The St Mary's, Islands (southwestern India) expose silicic volcanic and sub-volcanic rocks (rhyolites and granophyric dacites) emplaced contemporaneously with the Cretaceous igneous province of Madagascar, roughly 88-90 Ma ago. I he St Mary's Islands rocks have phenocrysts of plagioclase...... and isotopic Compositions very close to those of rhyolites exposed between Vatomandry Ilaka and Mananjary in eastern Madagascar, and are distinctly different from rhyolites front other sectors of the Madagascan province. We therefore postulate that the St Mary's and the Vatomandry-Ilaka Mananjary silicic rock...
The Marie Curie Actions at CERN – reaching out beyond particle physics and Europe
EU Projects Office
2014-01-01
The European Commission’s Marie Curie Actions have been a pillar of the EU Framework Programmes for several decades as a means of promoting career development and enhancing mobility of researchers in Europe. This corresponds nicely to one of CERN’s main missions: to train the next generation of scientists and engineers. The European Commissioner for Education, Culture, Multilingualism, Sport, Media and Youth, Androulla Vassiliou (centre) met the Marie Curie Fellows on her visit to CERN in April 2013. CERN has been pleased to be a major player in the Marie Curie Actions under the Sixth and Seventh Framework Programmes (FP6 from 2002 to 2006 and FP7 from 2007 to 2013), being one of the most successful participants in Europe. Under FP7, CERN was ranked first in Switzerland and fifth in Europe against stiff competition in terms of overall funding. Participation was in all of the Marie Curie Actions: Initial Training Networks, Industry-Academia Partnership Pathways, IRSES, CO...
Naine : masin või loom? / Maris Palgi
Palgi, Maris
2007-01-01
Eero Taltsi, Margus Kiisi, Maia Mölleri, Kaie Luige, Eva Orava ja Maris Palgi projektist "Maine-loom, naine-masin", mida tutvustati 2006. a. Moostes üritusel "Postsovkhoz 6", 2007. a. jaanuaris-veebruaris Tartu Kunstimajas ja Tartu Tampere Majas. Näitused avati E. Taltsi ja M. Kiisi loeng-performance'itega
Mariátegui entre dois mundos: Visões do comunitarismo indígena andino
Directory of Open Access Journals (Sweden)
Cristhian Teófilo da Silva
2014-12-01
Full Text Available Resumo Este artigo visa demonstrar que a presença da herança andina no projeto de socialismo “indo-americano” de Mariátegui gerou uma tensão epistemológica original e crítica do pensamento social marxista na América Latina. A partir desta releitura da perspectiva mariateguiana apoiada em duas vertentes, indigenista peruana e marxista europeia, o presente artigo afirma a importância dos estudos sobre o indigenismo para a compreensão dos limites do socialismo de orientação marxista no Peru. O artigo será concluído ressaltando a importância do socialismo indo-americano de Mariátegui para a “descoberta” da constituição híbrida do modo de produção peruano. Palavras-chave Indigenismo; marxismo; Peru; José Carlos Mariátegui --- Resumen Este artículo tiene como objetivo demostrar que la presencia de la herencia andina en el diseño del socialismo "indoamericano" de Mariátegui ha generado una crítica epistemológica original del pensamiento social marxista en América Latina. De este recuento la perspectiva de Mariátegui apoyada en dos frentes, indigenista peruana y marxista europea, este artículo defiende la importancia de los estudios sobre el indigenismo para la comprensión de los límites del socialismo marxista en el Perú. El artículo concluirá destacando la importancia del socialismo indo-americano de Mariátegui en el "descubrimiento" de la constitución híbrida del modo de producción peruana. Palabras clave Indigenismo; marxismo; Perú; José Carlos Mariátegui --- Abstract This article aims to demonstrate that the presence of the Andean heritage in Mariátegui's "Indo-American" socialist project generated a new and critical epistemological tension of the Marxist social thinking in Latin America. From this mariateguian retelling, which is established in two ways, Peruvian indigenous and European Marxist, this article maintains the importance of studies on the indigenous movement to understand
Igal mõisal on oma lugu / Mari-Ann Remmel
Remmel, Mari-Ann
2008-01-01
Kirjastuselt "Tänapäev" ilmus raamat "Mõisalegendid. Harjumaa", koostaja Mari-Ann Remmel, kujundaja Angelika Schneider. Kogumik sisaldab ka ajaloolist ning genealoogilist teavet mõisahoonete ning -omanike kohta
International Nuclear Information System (INIS)
Murthy, M.S.S.
1995-01-01
Sir Isaac Newton is credited to have said that he stood on the shoulders of giants and hence could see farther beyond. That is the case at all times in the progress of science and technology. Wilhelm Conrad Roentgen stood on the shoulders of giants and saw the invisible radiation that changed once and for all, the practice of medicine and surgery. 4 figs
Non-relativistic conformal symmetries and Newton-Cartan structures
International Nuclear Information System (INIS)
Duval, C; Horvathy, P A
2009-01-01
This paper provides us with a unifying classification of the conformal infinitesimal symmetries of non-relativistic Newton-Cartan spacetime. The Lie algebras of non-relativistic conformal transformations are introduced via the Galilei structure. They form a family of infinite-dimensional Lie algebras labeled by a rational 'dynamical exponent', z. The Schroedinger-Virasoro algebra of Henkel et al corresponds to z = 2. Viewed as projective Newton-Cartan symmetries, they yield, for timelike geodesics, the usual Schroedinger Lie algebra, for which z = 2. For lightlike geodesics, they yield, in turn, the Conformal Galilean Algebra (CGA) of Lukierski, Stichel and Zakrzewski (alias 'alt' of Henkel), with z = 1. Physical systems realizing these symmetries include, e.g. classical systems of massive and massless non-relativistic particles, and also hydrodynamics, as well as Galilean electromagnetism.
Eesti NATO ukselävel / Mari-Ann Kelam
Kelam, Mari-Ann, 1946-
2002-01-01
Seda, et NATO liitumisläbirääkimistele kutsutavate seas on ka Eesti, saab veel tänagi pidada üheks meie iseseisva riikluse suursaavutuseks, kui mitte imeks, kirjutab Riigikogu liige Mari-Ann Kelam. Autor: Isamaaliit. Parlamendisaadik
Directory of Open Access Journals (Sweden)
Suci Furwati
2017-08-01
Full Text Available Abstract: Students who have good conceptual acquisition will be able to represent the concept by using multi representation. This study aims to determine the improvement of students' understanding of the concept of Newton's Law material, and the quality of representation used in solving problems on Newton's Law material. The results showed that the concept acquisition of students increased from the average of 35.32 to 78.97 with an effect size of 2.66 (strong and N-gain of 0.68 (medium. The quality of each type of student representation also increased from level 1 and level 2 up to level 3. Key Words: concept aquisition, represetation quality, multi representation learning, Newton’s Law Abstrak: Siswa yang memiliki penguasaan konsep yang baik akan mampu merepresentasikan konsep dengan menggunakan multi representasi. Penelitian ini bertujuan untuk mengetahui peningkatan pemahaman konsep siswa SMP pada materi Hukum Newton, dan kualitas representasi yang digunakan dalam menyelesaikan masalah pada materi Hukum Newton. Hasil penelitian menunjukkan bahwa penguasaan konsep siswa meningkat dari rata-rata 35,32 menjadi 78,97 dengan effect size sebesar 2,66 (kuat dan N-gain sebesar 0,68 (sedang. Kualitas tiap jenis representasi siswa juga mengalami peningkatan dari level 1 dan level 2 naik menjadi level 3. Kata kunci: hukum Newton, kualitas representasi, pemahaman konsep, pembelajaran multi representasi
Mary Shelley's Frankenstein: what made the Monster monstrous?
Britton, Ronald
2015-02-01
This paper discusses the genesis of the famous story of Frankenstein which arose from a dream experienced by Mary Shelley whilst on a holiday shared with her husband Percy Shelley, Lord Byron, Dr Polidori and her step sister Claire Clairmont. The novel relates how the creature created by Victor Frankenstein horrifies him, is rejected by him and called a monster. The monster's ensuing despair and subsequent murderousness is eloquently described. The whole book is clearly connected to Mary Shelley's experience as an infant whose mother died after giving birth to her and her subsequent loss, as a mother, of her own new born infant. It is suggested that the novel imaginatively describes what it is to have been primarily rejected as an infant and to feel regarded as a monster. © 2015, The Society of Analytical Psychology.
Preconditioned Inexact Newton for Nonlinear Sparse Electromagnetic Imaging
Desmal, Abdulla; Bagci, Hakan
2014-01-01
with smoothness promoting optimization/regularization schemes. However, this type of regularization schemes are known to perform poorly when applied in imagining domains with sparse content or sharp variations. In this work, an inexact Newton algorithm
Sobolev, Mari, 1968-
1998-01-01
Rotermanni soolaladu. "Elektrokardiogramm" (tegevuskunsti üritus); Vaal-galerii. Antoni T̉pies "Litograafiaid aastatest 1973-1995"; Mari Kadanik, Eero Barndõk, Rain Ader "Pildid" (maalid); Paldiski Põhikool. "Niemenlautta ja Hugo Simbergi fotod" (soome kunstniku fotode koopiad, pildistatud enne 1915. a.; Kullo lastegalerii. Neli uut näitust.(lastekunst); Arhitektuurimuuseum. Arnold Matteus - Tartu linna arhitekt (juubelinäitus), Alvar Aalto "Kolm objekti Eestis"; Linnagalerii Tallinnas. "Valge" (ruumi- ja moekunsti näitus); Sammas-galerii. Jüri Jegorow "Insect" (arvutigraafika); Endla Teatri palmisaal. "Muzik in der Kunst" (Tallinna kunstitudengite näitus); Eesti Rahvusraamatukogu. Õie Kütt "Uued ja vanad ehted"
Mary Bidwell Breed: The Educator as Dean.
Fley, Jo Ann; Jaramillo, George R.
1979-01-01
Mary Bidwell Breed predicted that midwestern universities would probably "pass through a stage of educational development in which the liberal arts are entirely feminized, the men are entirely commercialized." We can appreciate how close she came to pinpointing trends which did not begin to be reversed until sixty years later.…
The problem of Newton dynamics
International Nuclear Information System (INIS)
Roman Roldan, R.
1998-01-01
The problem of the teaching of Newton's principles of dynamics at High School level is addressed. Some usages, reasoning and wording, are pointed as the responsible for the deficient results which are revealed in the background of the first year University students in Physics. A methodology based on simplifying the common vocabulary is proposed in order to provide to the students with a clearer view of the dynamic problems. Some typical examples are shown which illustrate the proposal. (Author)
Predikanten in ballingschap. De carrièrekansen van Jean en Isaac Claude in de Republiek
Directory of Open Access Journals (Sweden)
David van der Linden
2012-01-01
Full Text Available After the revocation of the Edict of Nantes in 1685, over 400 Huguenot ministers made their way to the Dutch Republic in search of a new pulpit. They stood a good chance, because the Huguenot exodus resulted in a corresponding demand for French preachers, while Dutch authorities offered financial support. Yet a surplus of ministers also meant fierce competition over positions. The careers of Jean and Isaac Claude show that on this highly competitive market Huguenot ministers succeeded in gaining a position in the Dutch Republic by virtue of their reputation, networks, and religious and political ideas.
Epistemologi dan Keterbatasan Teori Gravitasi
Directory of Open Access Journals (Sweden)
Erwin Erwin
2017-08-01
Full Text Available Peristiwa tentang kecenderungan jatuhnya benda-benda menuju pusat bumi dan keteraturan peredaran planet dan benda-benda langit lainnya dalam tata surya dahulu dianggap dua fenomena yang berbeda. Mekanika benda langit dan mekanika bumi yang sebelumnya merupakan dua pengetahuan yang terpisah, dianggap satu kesatuan oleh Sir Isaac Newton. Newton mengemukakan hukum gravitasi umum yaitu gaya tarik menarik antara dua benda besarnya sebanding dengan massa masing-masing benda dan berbanding terbalik dengan kuadrat jarak antara kedua benda. Hukum gravitasi ini sukses menjalaskan bagaimana benda cendrung jatuh menuju pusat bumi dan peredaran planet dan benda-benda langit lain mengelilingi matahari dalam sistem tata surya. Namun hukum gravitasi Newton ternyata tidak sepenuhnya tepat, beberapa hal dapat dijelaskan dengan hukum relativitas Einstein, namun demikian hukum relativitas Einstein juga dicurigai masih perlu diamandemen agar dapat menjelaskan fenomena alam dengan tepat.
EPISTEMOLOGI DAN KETERBATASAN TEORI GRAVITASI
Directory of Open Access Journals (Sweden)
Erwin Erwin
2017-08-01
Full Text Available Peristiwa tentang kecenderungan jatuhnya benda-benda menuju pusat bumi dan keteraturan peredaran planet dan benda-benda langit lainnya dalam tata surya dahulu dianggap dua fenomena yang berbeda. Mekanika benda langit dan mekanika bumi yang sebelumnya merupakan dua pengetahuan yang terpisah, dianggap satu kesatuan oleh Sir Isaac Newton. Newton mengemukakan hukum gravitasi umum yaitu gaya tarik menarik antara dua benda besarnya sebanding dengan massa masing-masing benda dan berbanding terbalik dengan kuadrat jarak antara kedua benda. Hukum gravitasi ini sukses menjalaskan bagaimana benda cendrung jatuh menuju pusat bumi dan peredaran planet dan benda-benda langit lain mengelilingi matahari dalam sistem tata surya. Namun hukum gravitasi Newton ternyata tidak sepenuhnya tepat, beberapa hal dapat dijelaskan dengan hukum relativitas Einstein, namun demikian hukum relativitas Einstein juga dicurigai masih perlu diamandemen agar dapat menjelaskan fenomena alam dengan tepat.
The cooling law and the search for a good temperature scale, from Newton to Dalton
Energy Technology Data Exchange (ETDEWEB)
Besson, Ugo, E-mail: ugo.besson@unipv.it [Department of Physics ' A Volta' , University of Pavia, Via A Bassi 6, 27100 Pavia (Italy)
2011-03-15
The research on the cooling law began with an article by Newton published in 1701. Later, many studies were performed by other scientists confirming or confuting Newton's law. This paper presents a description and an interpretation of Newton's article, provides a short overview of the research conducted on the topic during the 18th century, and discusses the relationships between the research on cooling laws and the definition of a temperature scale, as it was treated in Newton's article and in the work of Dalton, including Dalton's search for the absolute zero of temperature. It is shown that these scientists considered the exponential cooling law as a fundamental principle rather than a conjecture to be tested by means of experiments. The faith in the simplicity of natural laws and the spontaneous idea of proportionality between cause and effect seem to have strongly influenced Newton and Dalton. The topic is developed in a way that can be suitable for both undergraduate students and general physicists.
Directory of Open Access Journals (Sweden)
Eric Martone
2015-01-01
Full Text Available Review of Mary McAuliffe. Twilight of the Belle Epoque: The Paris of Picasso, Stravinsky, Proust, Renault, Marie Curie, Gertrude Stein, and Their Friends through the Great War . Lanham, MD: Rowman and Littlefield. 2014. vii + 418 pp.
Paying tribute to florence nightingale and Mary Seacole.
Grainger, Angela
2012-05-30
Lynn McDonald (letters May 16) says the grounds of St Thomas' Hospital in London are the wrong place for the proposed memorial statue to Mary Seacole, pointing out that the hospital is more associated with Florence Nightingale and her work.
Weight, the Normal Force and Newton's Third Law: Dislodging a Deeply Embedded Misconception
Low, David; Wilson, Kate
2017-01-01
On entry to university, high-achieving physics students from all across Australia struggle to identify Newton's third law force pairs. In particular, less than one in ten can correctly identify the Newton's third law reaction pair to the weight of (gravitational force acting on) an object. Most students incorrectly identify the normal force on the…
Edith Marie Thompson (1877–1961), sports and empire settlement administrator
Williams, Jean
2012-01-01
Thompson, Edith Marie (1877–1961), sports and empire settlement administrator, was born at 44 Russell Road, Kensington, London, on 19 May 1877, the only daughter of William Frederic Thompson (1847/8–1921), barrister and mineral and chemical merchant, and his wife, Marie Charlotte, née Warde (1849/50–1900). She was educated at Norland Place School and was a boarder at Cheltenham Ladies' College in 1892–3, at a period when there was still very little sport played at the school. In January 1895,...
DE NEWTON A EINSTEIN: A DEBATE EL DESTINO DEL UNIVERSO
Directory of Open Access Journals (Sweden)
ROGELIO PARREIRA
2010-01-01
Full Text Available En este artículo se describe la historia del pensamiento científico en términos de las teorías de la inercia, el espacio absoluto, la relatividad y la gravitación; de cómo Newton utilizó el trabajo de los primeros investigadores en sus teorías, y Einstein las teorías de Newton en la suya, para tratar de explicar el destino del universo. Es la descripción de un proceso revolucionario del conocimiento científico, y sus aportes al desarrollo de muchos otros campos del saber
Designing stellarator coils by a modified Newton method using FOCUS
Zhu, Caoxiang; Hudson, Stuart R.; Song, Yuntao; Wan, Yuanxi
2018-06-01
To find the optimal coils for stellarators, nonlinear optimization algorithms are applied in existing coil design codes. However, none of these codes have used the information from the second-order derivatives. In this paper, we present a modified Newton method in the recently developed code FOCUS. The Hessian matrix is calculated with analytically derived equations. Its inverse is approximated by a modified Cholesky factorization and applied in the iterative scheme of a classical Newton method. Using this method, FOCUS is able to recover the W7-X modular coils starting from a simple initial guess. Results demonstrate significant advantages.
Quasi-Newton methods for the acceleration of multi-physics codes
CSIR Research Space (South Africa)
Haelterman, R
2017-08-01
Full Text Available .E. Dennis, J.J. More´, Quasi-Newton methods: motivation and theory. SIAM Rev. 19, pp. 46–89 (1977) [11] J.E. Dennis, R.B. Schnabel, Least Change Secant Updates for quasi- Newton methods. SIAM Rev. 21, pp. 443–459 (1979) [12] G. Dhondt, CalculiX CrunchiX USER...) [25] J.M. Martinez, M.C. Zambaldi, An Inverse Column-Updating Method for solving large-scale nonlinear systems of equations. Optim. Methods Softw. 1, pp. 129–140 (1992) [26] J.M. Martinez, On the convergence of the column-updating method. Comp. Appl...
Convergence and Applications of a Gossip-Based Gauss-Newton Algorithm
Li, Xiao; Scaglione, Anna
2013-11-01
The Gauss-Newton algorithm is a popular and efficient centralized method for solving non-linear least squares problems. In this paper, we propose a multi-agent distributed version of this algorithm, named Gossip-based Gauss-Newton (GGN) algorithm, which can be applied in general problems with non-convex objectives. Furthermore, we analyze and present sufficient conditions for its convergence and show numerically that the GGN algorithm achieves performance comparable to the centralized algorithm, with graceful degradation in case of network failures. More importantly, the GGN algorithm provides significant performance gains compared to other distributed first order methods.
Deviations from Newton's law in supersymmetric large extra dimensions
International Nuclear Information System (INIS)
Callin, P.; Burgess, C.P.
2006-01-01
Deviations from Newton's inverse-squared law at the micron length scale are smoking-gun signals for models containing supersymmetric large extra dimensions (SLEDs), which have been proposed as approaches for resolving the cosmological constant problem. Just like their non-supersymmetric counterparts, SLED models predict gravity to deviate from the inverse-square law because of the advent of new dimensions at sub-millimeter scales. However SLED models differ from their non-supersymmetric counterparts in three important ways: (i) the size of the extra dimensions is fixed by the observed value of the dark energy density, making it impossible to shorten the range over which new deviations from Newton's law must be seen; (ii) supersymmetry predicts there to be more fields in the extra dimensions than just gravity, implying different types of couplings to matter and the possibility of repulsive as well as attractive interactions; and (iii) the same mechanism which is purported to keep the cosmological constant naturally small also keeps the extra-dimensional moduli effectively massless, leading to deviations from general relativity in the far infrared of the scalar-tensor form. We here explore the deviations from Newton's law which are predicted over micron distances, and show the ways in which they differ and resemble those in the non-supersymmetric case
Classroom Instruction: The Influences of Marie Clay
McNaughton, Stuart
2014-01-01
Marie Clay's body of work has influenced classroom instruction in direct and indirect ways, through large overarching themes in our pedagogical content knowledge as well as specific smart practices. This paper focuses on her the contributions to our thinking about instruction which come from two broad theoretical concepts; emergent literacy…
Läbi legendide William Shakespeare'i poole / Maris Peters
Peters, Maris
2010-01-01
Tutvustus: Wells, Stanley. Kas on tõsi, et Shakespeare ...? / tõlkinud Maris Peters. Tallinn : Argo, 2010. Raamat William Shakespeare kohta käivatest legendidest, kuuldustest ja teooriatest ning tema teoste autorsusest
Anne-Marie Sargueil: ilu on kasulik / intervjueerinud Emilie Toomela
Sargueil, Anne-Marie
2015-01-01
Prantsuse Disainiinstituudi juht Anne-Marie Sargueil rääkis prantsuse ja skandinaavia disainist, prantslaste disainieelistustest, uutest suundadest disaini valdkonnas, Eesti Tarbekunsti- ja Disainimuuseumis avatud näitusest "20 prantsuse disainiikooni"
Directory of Open Access Journals (Sweden)
Abramowicz, Anete
2009-11-01
Full Text Available A Revista Eletrônica de Educação teve o privilégio de entrevistar Marie Raynal, que apesar de muitas atividades nos concedeu um tempo para nos responder. Marie Raynal é Responsável pelo Departamento Ville-Ecole-Intégration (Cidade-Escola-Integração em Montrouge, França e Redatora Chefe (rédactrice em chef da Revista Diversité que é um dos únicos periódicos da educação na França que acolhe artigos sobre a diversidade social. Em 2003 foi criado o departamento “Ville & Education” sob a coordenação de Marie Raynal. Este departamento tem por missão acompanhar todos os atores da educação (professores, quadros da educação, coletividades, associações, etc. que tem por encargo - durante e fora do tempo escolar - as crianças e os jovens em situação de fragilidade, especialmente aqueles que vivem nos bairros da política da cidade, àqueles que se destacam por uma educação prioritária, os recém chegados na França e as crianças nômades. No conjunto destas questões, este departamento é considerado como expert nacional. Este departamento possui três revistas e uma carta de informação, entre elas está a revista trimestral em Ciências Sociais, a Diversité.The Revista Eletrônica de Educação (Electronic Journal of Education has the privilege to interview Marie Raynal, which although having many activities, dedicated us time to answer it. Marie Raynal is head of the Département de Ville-Ecole-Intégration (Department of City-School-Integration in Montrouge, France and Chief editor of the journal Diversité, which includes articles on social diversity. In 2003, the department "Ville & Education" is created under the authority of Marie Raynal. Its mission is to accompany all education members (teachers, education managers, communities, associations, etc. that are in charge, during and after school time, children and youth in situations of fragility, including those living in neighborhood of the city policy, those
Costume Cinema and Materiality Telling the Story of Marie Antoinette through Dress
Therése Andersson
2011-01-01
In ‘Costume Cinema and Materiality: Telling the Story of Marie Antoinette through Dress’ a materiality-based approach for analysing film narratives through costumes is examined. Sofia Coppola’s film Marie Antoinette (2006) serves as the empirical starting point and the theme of dressing and redressing is pursued throughout the film, crystallizing costume as a significant feature for reading the movie. The article argues that costumes, on a symbolic level, work as agents. It thus focuses on th...
On deviations from Newton's law and the proposal for a 'Fifth Force'
International Nuclear Information System (INIS)
Ferreira, L.A.; Malbouisson, A.P.C.
1986-01-01
The results of geophysical and laboratory measurements of Newton's constant of gravitation, seem to disagree by one percent. Attempts to explain this have led to the revival of the proposal for a fifth interaction in Nature. The experimental results on measurements of G and tests of Newton's inverse square law are reviewed. The recent reanalysis of the Eoetvoes experiment and proposals for new experiments are discussed. (Author) [pt
Disk-galaxy density distribution from orbital speeds using Newton's law, version 1.1
Nicholson, Kenneth F.
2000-01-01
Given the dimensions(including thickness) of an axisymmetric galaxy, Newton's law is used in integral form to find the density distributions required to match a wide range of orbital speed profiles. Newton's law is not modified and no dark-matter halos are required. The speed distributions can have extreme shapes if they are reasonably smooth. Several examples are given.
A Newton-type neural network learning algorithm
International Nuclear Information System (INIS)
Ivanov, V.V.; Puzynin, I.V.; Purehvdorzh, B.
1993-01-01
First- and second-order learning methods for feed-forward multilayer networks are considered. A Newton-type algorithm is proposed and compared with the common back-propagation algorithm. It is shown that the proposed algorithm provides better learning quality. Some recommendations for their usage are given. 11 refs.; 1 fig.; 1 tab
Raamatukogu esisele kerkib kevadel Marie Underi kuju / Andres Eilart
Eilart, Andres
2009-01-01
Skulptor Mati Karminil ja arhitekt Tiit Trummalil valmib valgest marmorist mälestusmärk Marie Underile. Kuju püstitatakse 2010. a. kevadel Eesti Rahvusraamatukogu ette. Alale on kavandatud ka veekaskaadid
DEFF Research Database (Denmark)
Silcowitz, Morten; Niebe, Sarah Maria; Erleben, Kenny
2009-01-01
contact response. In this paper, we present a new approach to contact force determination. We reformulate the contact force problem as a nonlinear root search problem, using a Fischer function. We solve this problem using a generalized Newton method. Our new Fischer - Newton method shows improved...... qualities for specific configurations where the most widespread alternative, the Projected Gauss-Seidel method, fails. Experiments show superior convergence properties of the exact Fischer - Newton method....
A Newton Algorithm for Multivariate Total Least Squares Problems
Directory of Open Access Journals (Sweden)
WANG Leyang
2016-04-01
Full Text Available In order to improve calculation efficiency of parameter estimation, an algorithm for multivariate weighted total least squares adjustment based on Newton method is derived. The relationship between the solution of this algorithm and that of multivariate weighted total least squares adjustment based on Lagrange multipliers method is analyzed. According to propagation of cofactor, 16 computational formulae of cofactor matrices of multivariate total least squares adjustment are also listed. The new algorithm could solve adjustment problems containing correlation between observation matrix and coefficient matrix. And it can also deal with their stochastic elements and deterministic elements with only one cofactor matrix. The results illustrate that the Newton algorithm for multivariate total least squares problems could be practiced and have higher convergence rate.
Charcot-Marie-Tooth disease type 1A
DEFF Research Database (Denmark)
Hertz, Jens Michael; Børglum, A D; Brandt, C A
1994-01-01
Charcot-Marie-Tooth disease type 1A (CMT1A) is an autosomal dominant peripheral neuropathy associated with a DNA duplication on chromosome 17p11.2-p12 in the majority of cases. Most of the sporadic cases are due to a de novo duplication. We have screened for this duplication in 11 Danish patients...
Running Newton constant, improved gravitational actions, and galaxy rotation curves
International Nuclear Information System (INIS)
Reuter, M.; Weyer, H.
2004-01-01
A renormalization group (RG) improvement of the Einstein-Hilbert action is performed which promotes Newton's constant and the cosmological constant to scalar functions on spacetime. They arise from solutions of an exact RG equation by means of a 'cutoff identification' which associates RG scales to the points of spacetime. The resulting modified Einstein equations for spherically symmetric, static spacetimes are derived and analyzed in detail. The modifications of the Newtonian limit due to the RG evolution are obtained for the general case. As an application, the viability of a scenario is investigated where strong quantum effects in the infrared cause Newton's constant to grow at large (astrophysical) distances. For two specific RG trajectories exact vacuum spacetimes modifying the Schwarzschild metric are obtained by means of a solution-generating Weyl transformation. Their possible relevance to the problem of the observed approximately flat galaxy rotation curves is discussed. It is found that a power law running of Newton's constant with a small exponent of the order 10 -6 would account for their non-Keplerian behavior without having to postulate the presence of any dark matter in the galactic halo
Camera-pose estimation via projective Newton optimization on the manifold.
Sarkis, Michel; Diepold, Klaus
2012-04-01
Determining the pose of a moving camera is an important task in computer vision. In this paper, we derive a projective Newton algorithm on the manifold to refine the pose estimate of a camera. The main idea is to benefit from the fact that the 3-D rigid motion is described by the special Euclidean group, which is a Riemannian manifold. The latter is equipped with a tangent space defined by the corresponding Lie algebra. This enables us to compute the optimization direction, i.e., the gradient and the Hessian, at each iteration of the projective Newton scheme on the tangent space of the manifold. Then, the motion is updated by projecting back the variables on the manifold itself. We also derive another version of the algorithm that employs homeomorphic parameterization to the special Euclidean group. We test the algorithm on several simulated and real image data sets. Compared with the standard Newton minimization scheme, we are now able to obtain the full numerical formula of the Hessian with a 60% decrease in computational complexity. Compared with Levenberg-Marquardt, the results obtained are more accurate while having a rather similar complexity.
Photometry and polarimetry of AM Herculis
Energy Technology Data Exchange (ETDEWEB)
Bailey, J A; Jones, D H.P. [Royal Greenwich Observatory, Hailsham (UK); Parkes, G E; Mason, K O
1978-06-01
Some new high-speed photometric and polarmetric observations of AM Herculare is presented. These new data obtained during 1977 with the 2.5 m Isaac Newton telescope are compared to previous observations. Several properties are noted to have changed, in particular the size and structure of the periodic linear-polarization events. There is no evidence for periodic variation of the polarization apart from the 3-hr orbital period.
CCD photometry of Cepheid sequences in four nearby galaxies
International Nuclear Information System (INIS)
Metcalfe, N.; Shanks, T.
1991-01-01
We present Isaac Newton Telescope B and V CCD observations of deep photometric sequences in the vicinity of Cepheid variable stars in three nearby galaxies - M31, M33 and NGC 2403. We have also checked the photometry of the brightest stars in M81 and its dwarf companion, Holmberg IX. We use our data, combined with other recent results, to re-analyse the Cepheid distances to these galaxies. (author)
Photometry and polarimetry of AM Herculis
International Nuclear Information System (INIS)
Bailey, J.A.; Jones, D.H.P.; Parkes, G.E.; Mason, K.O.
1978-01-01
Some new high-speed photometric and polarmetric observations of AM Herculare is presented. These new data obtained during 1977 with the 2.5 m Isaac Newton telescope are compared to previous observations. Several properties are noted to have changed, in particular the size and structure of the periodic linear-polarization events. There is no evidence for periodic variation of the polarization apart from the 3-hr orbital period. (author)
VizieR Online Data Catalog: sigma Ori low-mass stars (Kenyon+, 2005)
Kenyon, M. J.; Jeffries, R. D.; Naylor, T.; Oliveira, J. M.; Maxted, P. F. L.
2005-04-01
We observed the field around sigma Ori with the Wide Field Camera (WFC) on the 2.5-m Isaac Newton Telescope using Harris R and Sloan i filters on the nights of 1999 September 2730. Spectra were obtained with the Wide Field Fiber Optic Spectrograph (WYFFOS) mounted at the Nasmyth focus of the 4.2-m William Herschel Telescope during the nights of 1999 December 11 and 12. (5 data files).
MPPT for Photovoltaic Modules via Newton-Like Extremum Seeking Control
Directory of Open Access Journals (Sweden)
Ramon Leyva
2012-07-01
Full Text Available The paper adapts the Newton-like Extremum-Seeking Control technique to extract the maximum power from photovoltaic panels. This technique uses the gradient and Hessian of the panel characteristic in order to approximate the operating point to its optimum. The paper describes in detail the gradient and Hessian estimations carried out by means of sinusoidal dithering signals. Furthermore, we compare the proposed technique with the common Extremum Seeking Control that only uses the gradient. The comparison is done by means of PSIM simulations and it shows the different transient behaviors and the faster response of the Newton-like Extremum-Seeking Control solution.
Newton-Cartan supergravity with torsion and Schrödinger supergravity
International Nuclear Information System (INIS)
Bergshoeff, Eric; Rosseel, Jan; Zojer, Thomas
2015-01-01
We derive a torsionfull version of three-dimensional N=2 Newton-Cartan supergravity using a non-relativistic notion of the superconformal tensor calculus. The “superconformal” theory that we start with is Schrödinger supergravity which we obtain by gauging the Schrödinger superalgebra. We present two non-relativistic N=2 matter multiplets that can be used as compensators in the superconformal calculus. They lead to two different off-shell formulations which, in analogy with the relativistic case, we call “old minimal” and “new minimal” Newton-Cartan supergravity. We find similarities but also point out some differences with respect to the relativistic case.
Newton-Cartan supergravity with torsion and Schrödinger supergravity
Energy Technology Data Exchange (ETDEWEB)
Bergshoeff, Eric [Van Swinderen Institute for Particle Physics and Gravity, University of Groningen,Nijenborgh 4, 9747 AG Groningen (Netherlands); Rosseel, Jan [Institute for Theoretical Physics, Vienna University of Technology,Wiedner Hauptstr. 8-10/136, A-1040 Vienna (Austria); Albert Einstein Center for Fundamental Physics, University of Bern,Sidlerstrasse 5, 3012 Bern (Switzerland); Zojer, Thomas [Van Swinderen Institute for Particle Physics and Gravity, University of Groningen,Nijenborgh 4, 9747 AG Groningen (Netherlands)
2015-11-25
We derive a torsionfull version of three-dimensional N=2 Newton-Cartan supergravity using a non-relativistic notion of the superconformal tensor calculus. The “superconformal” theory that we start with is Schrödinger supergravity which we obtain by gauging the Schrödinger superalgebra. We present two non-relativistic N=2 matter multiplets that can be used as compensators in the superconformal calculus. They lead to two different off-shell formulations which, in analogy with the relativistic case, we call “old minimal” and “new minimal” Newton-Cartan supergravity. We find similarities but also point out some differences with respect to the relativistic case.
Newton-Cartan supergravity with torsion and Schrodinger supergravity
Bergshoeff, Eric; Rosseel, Jan; Zojer, Thomas
2015-01-01
We derive a torsionfull version of three-dimensional N - 2 Newton-Cartan supergravity using a non-relativistic notion of the superconformal tensor calculus. The "superconformal" theory that we start with is Schrodinger supergravity which we obtain by gauging the Schrodinger superalgebra. We present
Torsional Newton-Cartan geometry and the Schrodinger algebra
Bergshoeff, Eric A.; Hartong, Jelle; Rosseel, Jan
2015-01-01
We show that by gauging the Schrodinger algebra with critical exponent z and imposing suitable curvature constraints, that make diffeomorphisms equivalent to time and space translations, one obtains a geometric structure known as (twistless) torsional Newton-Cartan geometry (TTNC). This is a version
The design and research of anti-color-noise chaos M-ary communication system
Energy Technology Data Exchange (ETDEWEB)
Fu, Yongqing, E-mail: fuyongqing@hrbeu.edu.cn; Li, Xingyuan; Li, Yanan [College of information and Communication Engineering, Harbin Engineering University, Harbin 150001 (China); Zhang, Lin [College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001 (China)
2016-03-15
Previously a novel chaos M-ary digital communication method based on spatiotemporal chaos Hamilton oscillator has been proposed. Without chaos synchronization circumstance, it has performance improvement in bandwidth efficiency, transmission efficiency and anti-white-noise performance compared with traditional communication method. In this paper, the channel noise influence on chaotic modulation signals and the construction problem of anti-color-noise chaotic M-ary communication system are studied. The formula of zone partition demodulator’s boundary in additive white Gaussian noise is derived, besides, the problem about how to determine the boundary of zone partition demodulator in additive color noise is deeply studied; Then an approach on constructing anti-color-noise chaos M-ary communication system is proposed, in which a pre-distortion filter is added after the chaos baseband modulator in the transmitter and whitening filter is added before zone partition demodulator in the receiver. Finally, the chaos M-ary communication system based on Hamilton oscillator is constructed and simulated in different channel noise. The result shows that the proposed method in this paper can improve the anti-color-noise performance of the whole communication system compared with the former system, and it has better anti-fading and resisting disturbance performance than Quadrature Phase Shift Keying system.
The design and research of anti-color-noise chaos M-ary communication system
International Nuclear Information System (INIS)
Fu, Yongqing; Li, Xingyuan; Li, Yanan; Zhang, Lin
2016-01-01
Previously a novel chaos M-ary digital communication method based on spatiotemporal chaos Hamilton oscillator has been proposed. Without chaos synchronization circumstance, it has performance improvement in bandwidth efficiency, transmission efficiency and anti-white-noise performance compared with traditional communication method. In this paper, the channel noise influence on chaotic modulation signals and the construction problem of anti-color-noise chaotic M-ary communication system are studied. The formula of zone partition demodulator’s boundary in additive white Gaussian noise is derived, besides, the problem about how to determine the boundary of zone partition demodulator in additive color noise is deeply studied; Then an approach on constructing anti-color-noise chaos M-ary communication system is proposed, in which a pre-distortion filter is added after the chaos baseband modulator in the transmitter and whitening filter is added before zone partition demodulator in the receiver. Finally, the chaos M-ary communication system based on Hamilton oscillator is constructed and simulated in different channel noise. The result shows that the proposed method in this paper can improve the anti-color-noise performance of the whole communication system compared with the former system, and it has better anti-fading and resisting disturbance performance than Quadrature Phase Shift Keying system.
Emilie du Châtelet between Leibniz and Newton
Hagengruber, Ruth
2012-01-01
This book describes Emilie du Chatelet known as "Emilia Newtonmania", and her innovative and outstanding position within the controversy between Newton and Leibniz, one of the fundamental scientific discourses of her time.
3D CSEM data inversion using Newton and Halley class methods
Amaya, M.; Hansen, K. R.; Morten, J. P.
2016-05-01
For the first time in 3D controlled source electromagnetic data inversion, we explore the use of the Newton and the Halley optimization methods, which may show their potential when the cost function has a complex topology. The inversion is formulated as a constrained nonlinear least-squares problem which is solved by iterative optimization. These methods require the derivatives up to second order of the residuals with respect to model parameters. We show how Green's functions determine the high-order derivatives, and develop a diagrammatical representation of the residual derivatives. The Green's functions are efficiently calculated on-the-fly, making use of a finite-difference frequency-domain forward modelling code based on a multi-frontal sparse direct solver. This allow us to build the second-order derivatives of the residuals keeping the memory cost in the same order as in a Gauss-Newton (GN) scheme. Model updates are computed with a trust-region based conjugate-gradient solver which does not require the computation of a stabilizer. We present inversion results for a synthetic survey and compare the GN, Newton, and super-Halley optimization schemes, and consider two different approaches to set the initial trust-region radius. Our analysis shows that the Newton and super-Halley schemes, using the same regularization configuration, add significant information to the inversion so that the convergence is reached by different paths. In our simple resistivity model examples, the convergence speed of the Newton and the super-Halley schemes are either similar or slightly superior with respect to the convergence speed of the GN scheme, close to the minimum of the cost function. Due to the current noise levels and other measurement inaccuracies in geophysical investigations, this advantageous behaviour is at present of low consequence, but may, with the further improvement of geophysical data acquisition, be an argument for more accurate higher-order methods like those
Mary Tyler Moore Helps Launch NIH MedlinePlus Magazine
... Issues Mary Tyler Moore Helps Launch NIH MedlinePlus Magazine Past Issues / Winter 2007 Table of Contents For ... Javascript on. Among those attending the NIH MedlinePlus magazine launch on Capitol Hill were (l-r) NIH ...
Mari Koger : seina sisse ehitatud akvaariumiga poissmehekodu / Gitte Hint
Hint, Gitte
2003-01-01
80-ruutmeetrine poissmehekorter Viimsi uues elamus. Elutoa ja vannitoa vahelises seinas paikneb kahelt poolt vaadeldav akvaarium. Magamistoa üks seintest on ehitatud vanadest tellistest. Sisearhitekt Mari Koger, tema kommentaarid. Ill.: plaan, 9 värv. vaadet
Modified Block Newton method for the lambda modes problem
Energy Technology Data Exchange (ETDEWEB)
González-Pintor, S., E-mail: segonpin@isirym.upv.es [Departamento de Ingeniería Química y Nuclear, Universidad Politécnica de Valencia, Camino de Vera 14, 46022 Valencia (Spain); Ginestar, D., E-mail: dginestar@mat.upv.es [Instituto de Matemática Multidisciplinar, Universidad Politécnica de Valencia, Camino de Vera 14, 46022 Valencia (Spain); Verdú, G., E-mail: gverdu@iqn.upv.es [Departamento de Ingeniería Química y Nuclear, Universidad Politécnica de Valencia, Camino de Vera 14, 46022 Valencia (Spain)
2013-06-15
Highlights: ► The Modal Method is based on expanding the solution in a set of dominant modes. ► Updating the set of dominant modes improve its performance. ► A Modified Block Newton Method, which use previous calculated modes, is proposed. ► The method exhibits a very good local convergence with few iterations. ► Good performance results are also obtained for heavy perturbations. -- Abstract: To study the behaviour of nuclear power reactors it is necessary to solve the time dependent neutron diffusion equation using either a rectangular mesh for PWR and BWR reactors or a hexagonal mesh for VVER reactors. This problem can be solved by means of a modal method, which uses a set of dominant modes to expand the neutron flux. For the transient calculations using the modal method with a moderate number of modes, these modes must be updated each time step to maintain the accuracy of the solution. The updating modes process is also interesting to study perturbed configurations of a reactor. A Modified Block Newton method is studied to update the modes. The performance of the Newton method has been tested for a steady state perturbation analysis of two 2D hexagonal reactors, a perturbed configuration of the IAEA PWR 3D reactor and two configurations associated with a boron dilution transient in a BWR reactor.
Rehabilitation programme for the Mary Kathleen uranium mine
International Nuclear Information System (INIS)
Duffield, I.R.; Ward, T.A.
1989-01-01
The Mary Kathleen uranium deposit was located in the North West region of the state of Queensland, Australia. It was discovered in 1954 and mined in two phases for a total of twelve years between 1958 and 1982. In October 1982 operations at the site ceased with the deposit virtually exhausted and all contractual commitments completed. From the outset, a site specific approach was adopted in developing the rehabilitation plan. Other sites'experience was evaluated but was adopted only if appropriate for Mary Kathleen. As a result of this approach a conceptual solution was established for each area within the site. Each solution was then used as the basis for detailed planning for rehabilitation of that area. The rehabilitation program commenced in mid 1982 and was completed in late 1985. Results of monitoring provided a strong basis for confidence that the objectives of the plan have been met, and allowed for the relinquishment of all the remaining mining leases in August 1987
A smooth generalized Newton method for a class of non-smooth equations
International Nuclear Information System (INIS)
Uko, L. U.
1995-10-01
This paper presents a Newton-type iterative scheme for finding the zero of the sum of a differentiable function and a multivalued maximal monotone function. Local and semi-local convergence results are proved for the Newton scheme, and an analogue of the Kantorovich theorem is proved for the associated modified scheme that uses only one Jacobian evaluation for the entire iteration. Applications in variational inequalities are discussed, and an illustrative numerical example is given. (author). 24 refs
Heat kernel for Newton-Cartan trace anomalies
Energy Technology Data Exchange (ETDEWEB)
Auzzi, Roberto [Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Via Musei 41, Brescia, 25121 (Italy); INFN Sezione di Perugia, Via A. Pascoli, Perugia, 06123 (Italy); Nardelli, Giuseppe [Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Via Musei 41, Brescia, 25121 (Italy); TIFPA - INFN, Università di Trento,c/o Dipartimento di Fisica, Povo, TN, 38123 (Italy)
2016-07-11
We compute the leading part of the trace anomaly for a free non-relativistic scalar in 2+1 dimensions coupled to a background Newton-Cartan metric. The anomaly is proportional to 1/m, where m is the mass of the scalar. We comment on the implications of a conjectured a-theorem for non-relativistic theories with boost invariance.
Newton's First Law: A Learning Cycle Approach
McCarthy, Deborah
2005-01-01
To demonstrate how Newton's first law of motion applies to students' everyday lives, the author developed a learning cycle series of activities on inertia. The discrepant event at the heart of these activities is sure to elicit wide-eyed stares and puzzled looks from students, but also promote critical thinking and help bring an abstract concept…
Mariátegui e a ocidentalização da política Mariátegui and the occidentalization of politics
Directory of Open Access Journals (Sweden)
Ricardo Melgar Bao
2007-05-01
Full Text Available A contribuição de Mariátegui para pensar o socialismo na América Latina é resgatada por meio das críticas à marginalização cultural e política dos povos não-ocidentais, bem como do particular uso que deu ao marxismo, acentuando-lhe as características universais através da apropriação cultural dos diversos contextos. Palavras-chave: América Latina. Oriente. Ocidente. Marxismo. Socialismo. Civilização. Cultura. Identidade. The contribution of Mariátequi for the view of socialism in Latin America is recovered not only through the criticism of the cultural and political marginal position of the non-western people but also through the particular way he used marxism, reinforcing its universal characteristics by the cultural appropriation of different cultural contexts. Keywords: Latin America. East. West. Marxism. Socialism. Civilization. Culture. Identity.
CAIXA: a catalogue of AGN in the XMM-Newton archive. III. Excess variance analysis
Ponti, G.; Papadakis, I.; Bianchi, S.; Guainazzi, M.; Matt, G.; Uttley, P.; Bonilla, N.F.
2012-01-01
Context. We report on the results of the first XMM-Newton systematic "excess variance" study of all the radio quiet, X-ray un-obscured AGN. The entire sample consist of 161 sources observed by XMM-Newton for more than 10 ks in pointed observations, which is the largest sample used so far to study
Improved Quasi-Newton method via PSB update for solving systems of nonlinear equations
Mamat, Mustafa; Dauda, M. K.; Waziri, M. Y.; Ahmad, Fadhilah; Mohamad, Fatma Susilawati
2016-10-01
The Newton method has some shortcomings which includes computation of the Jacobian matrix which may be difficult or even impossible to compute and solving the Newton system in every iteration. Also, the common setback with some quasi-Newton methods is that they need to compute and store an n × n matrix at each iteration, this is computationally costly for large scale problems. To overcome such drawbacks, an improved Method for solving systems of nonlinear equations via PSB (Powell-Symmetric-Broyden) update is proposed. In the proposed method, the approximate Jacobian inverse Hk of PSB is updated and its efficiency has improved thereby require low memory storage, hence the main aim of this paper. The preliminary numerical results show that the proposed method is practically efficient when applied on some benchmark problems.
Newton-Hooke spacetimes, Hpp-waves and the cosmological constant
International Nuclear Information System (INIS)
Gibbons, G W; Patricot, C E
2003-01-01
We show explicitly how the Newton-Hooke groups N ± 10 act as symmetries of the equations of motion of non-relativistic cosmological models with a cosmological constant. We give the action on the associated non-relativistic spacetimes M ± 4 and show how these may be obtained from a null reduction of five-dimensional homogeneous pp-wave Lorentzian spacetimes M ± 5 . This allows us to realize the Newton-Hooke groups and their Bargmann-type central extensions as subgroups of the isometry groups of M ± 5 . The extended Schroedinger-type conformal group is identified and its action on the equations of motion given. The non-relativistic conformal symmetries also have applications to time-dependent harmonic oscillators. Finally we comment on a possible application to Gao's generalization of the matrix model
Study on the algorithm for Newton-Rapson iteration interpolation of NURBS curve and simulation
Zhang, Wanjun; Gao, Shanping; Cheng, Xiyan; Zhang, Feng
2017-04-01
In order to solve the problems of Newton-Rapson iteration interpolation method of NURBS Curve, Such as interpolation time bigger, calculation more complicated, and NURBS curve step error are not easy changed and so on. This paper proposed a study on the algorithm for Newton-Rapson iteration interpolation method of NURBS curve and simulation. We can use Newton-Rapson iterative that calculate (xi, yi, zi). Simulation results show that the proposed NURBS curve interpolator meet the high-speed and high-accuracy interpolation requirements of CNC systems. The interpolation of NURBS curve should be finished. The simulation results show that the algorithm is correct; it is consistent with a NURBS curve interpolation requirements.
The XMM-Newton Science Archive and its integration into ESASky
Loiseau, N.; Baines, D.; Colomo, E.; Giordano, F.; Merín, B.; Racero, E.; Rodríguez, P.; Salgado, J.; Sarmiento, M.
2017-07-01
We describe the variety of functionalities of the XSA (XMM-Newton Science Archive) that allow to search and access the XMM-Newton data and catalogues. The web interface http://nxsa.esac.esa.int/ is very flexible allowing different kinds of searches by a single position or target name, or by a list of targets, with several selecting options (target type, text in the abstract, etc.), and with several display options. The resulting data can be easily broadcast to Virtual Observatory (VO) facilities for a first look analysis, or for cross-matching the results with info from other observatories. Direct access via URL or command line are also possible for scripts usage, or to link XMM-Newton data from other interfaces like Vizier, ADS, etc. The full metadata content of the XSA can be queried through the TAP (Table access Protocol) via ADQL (Astronomical Data Query Language). We present also the roadmap for future improvements of the XSA including the integration of the Upper Limit server, the on-the-fly data analysis, and the interactive visualization of EPIC sources spectra and light curves and RGS spectra, among other advanced features. Within this modern visualization philosophy XSA is also being integrated into ESASky (http://sky.esa.int). ESASky is the science-driven multi-wavelength discovery portal for all the ESA Astronomy Missions (Integral, HST, Herschel, Suzaku, Planck, etc.), and other space and ground telescope data. The system offers progressive multi-resolution all-sky projections of full mission datasets using HiPS, a new generation of HEALPix projections developed by CDS, precise footprints to connect to individual observations, and direct access to science-ready data from the underlying mission specific science archives. XMM-Newton EPIC and OM all-sky HiPS maps, catalogues and links to the observations are available through ESASky.
33 CFR 207.440 - St. Marys Falls Canal and Locks, Mich.; use, administration, and navigation.
2010-07-01
... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false St. Marys Falls Canal and Locks... CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE NAVIGATION REGULATIONS § 207.440 St... include all of the natural waters of the St. Marys River on the U.S. side of the International Boundary...
Marie Curie: In the laboratory and on the battlefield
International Nuclear Information System (INIS)
Badash, Lawrence
2003-01-01
This year is the centennial of the Nobel Prize in Physics shared by Henri Becquerel and the Curies for their pioneering work on radioactivity. But Marie Curie's contribution to the medical use of x rays is not widely known
Exploring the Universe with John Milton and Mary Shelley.
Poston, David
1989-01-01
Presents an approach to teaching John Milton's "Paradise Lost" in conjunction with Mary Shelley's "Frankenstein." Notes that a study of these works stimulates vigorous discussions on theological and moral issues, human nature, and the cultural past and future. (MM)
Reklaamid nagu kino / Jean Marie Bouriscot ; interv.Valner Valme
Bouriscot, Jean Marie
2001-01-01
Sakala keskuses toimus reedel 6. korda reklaamiõgijate öö, kus näidati reklaamiklippe Jean Marie Bouriscotþ kogust. Kogu omanik polnud küll seekord ise kohal, kuid vastas siiski ajakirjaniku küsimustele oma huviala kohta
The continuous, desingularized Newton method for meromorphic functions
Jongen, H.Th.; Jonker, P.; Twilt, F.
For any (nonconstant) meromorphic function, we present a real analytic dynamical system, which may be interpreted as an infinitesimal version of Newton's method for finding its zeros. A fairly complete description of the local and global features of the phase portrait of such a system is obtained
Easy XMM-Newton Data Analysis with the Streamlined ABC Guide!
Valencic, Lynne A.; Snowden, Steven L.; Pence, William D.
2016-01-01
The US XMM-Newton GOF has streamlined the time-honored XMM-Newton ABC Guide, making it easier to find and use what users may need to analyze their data. It takes into account what type of data a user might have, if they want to reduce the data on their own machine or over the internet with Web Hera, and if they prefer to use the command window or a GUI. The GOF has also included an introduction to analyzing EPIC and RGS spectra, and PN Timing mode data. The guide is provided for free to students, educators, and researchers for educational and research purposes. Try it out at: http://heasarc.gsfc.nasa.gov/docs/xmm/sl/intro.html
Üleujutus arendaja hingel / Maris Kuuda
Kuuda, Maris
2007-01-01
Kohalikel omavalitsustel pole piisavalt hoobasid sundida arendajaid üleujutusohuga arvestama. Pärnusse hotelli September rajajad (arhitektid Emil Urbel, Andrus Mark) arvestavad ujutusohuga. Arvamust avaldavad Rene Reisner, Mari Sepp, Ülo Sults, Karri Tiigisoon, Indrek Rannik, Mark Soosaar, Tiiu Pärn, Merle Looring, Rita Sepp, Kaspar Alles. Keskkonnaministeeriumi plaanist muuta veeseadust, mis sunniks ehitajaid ja arendajaid arvestama üleujutusohuga. Lisadena olulise üleujutusohuga alad Eestis ning üleujutuste ohjamist käsitleva Euroopa Liidu direktiivi eelnõust
International Nuclear Information System (INIS)
Mylonakis, Antonios G.; Varvayanni, M.; Catsaros, N.
2017-01-01
Highlights: •A Newton-based Jacobian-free Monte Carlo/thermal-hydraulic coupling approach is introduced. •OpenMC is coupled with COBRA-EN with a Newton-based approach. •The introduced coupling approach is tested in numerical experiments. •The performance of the new approach is compared with the traditional “serial” coupling approach. -- Abstract: In the field of nuclear reactor analysis, multi-physics calculations that account for the bonded nature of the neutronic and thermal-hydraulic phenomena are of major importance for both reactor safety and design. So far in the context of Monte-Carlo neutronic analysis a kind of “serial” algorithm has been mainly used for coupling with thermal-hydraulics. The main motivation of this work is the interest for an algorithm that could maintain the distinct treatment of the involved fields within a tight coupling context that could be translated into higher convergence rates and more stable behaviour. This work investigates the possibility of replacing the usually used “serial” iteration with an approximate Newton algorithm. The selected algorithm, called Approximate Block Newton, is actually a version of the Jacobian-free Newton Krylov method suitably modified for coupling mono-disciplinary solvers. Within this Newton scheme the linearised system is solved with a Krylov solver in order to avoid the creation of the Jacobian matrix. A coupling algorithm between Monte-Carlo neutronics and thermal-hydraulics based on the above-mentioned methodology is developed and its performance is analysed. More specifically, OpenMC, a Monte-Carlo neutronics code and COBRA-EN, a thermal-hydraulics code for sub-channel and core analysis, are merged in a coupling scheme using the Approximate Block Newton method aiming to examine the performance of this scheme and compare with that of the “traditional” serial iterative scheme. First results show a clear improvement of the convergence especially in problems where significant
Need sinihallid veised... : Marie Under ja Villem Ridala / Ruth Mirov
Mirov, Ruth, 1928-
2008-01-01
Vaadeldakse kahte ühest ja samast muistendist - merest tõusnud lehmakarjast - inspireeritud ballaadi: Marie Underi "Merilehmi" (ilm. kogus "Õnnevarjutus", 1929) ja Villem Ridala "Sinist karja" (ilm. kogus "Sinine kari", 1930)
Hořava-Lifshitz gravity from dynamical Newton-Cartan geometry
International Nuclear Information System (INIS)
Hartong, Jelle; Obers, Niels A.
2015-01-01
Recently it has been established that torsional Newton-Cartan (TNC) geometry is the appropriate geometrical framework to which non-relativistic field theories couple. We show that when these geometries are made dynamical they give rise to Hořava-Lifshitz (HL) gravity. Projectable HL gravity corresponds to dynamical Newton-Cartan (NC) geometry without torsion and non-projectable HL gravity corresponds to dynamical NC geometry with twistless torsion (hypersurface orthogonal foliation). We build a precise dictionary relating all fields (including the scalar khronon), their transformations and other properties in both HL gravity and dynamical TNC geometry. We use TNC invariance to construct the effective action for dynamical twistless torsional Newton-Cartan geometries in 2+1 dimensions for dynamical exponent 1
Hořava-Lifshitz gravity from dynamical Newton-Cartan geometry
Energy Technology Data Exchange (ETDEWEB)
Hartong, Jelle [Physique Théorique et Mathématique and International Solvay Institutes, Université Libre de Bruxelles,C.P. 231, 1050 Brussels (Belgium); Obers, Niels A. [The Niels Bohr Institute, Copenhagen University,Blegdamsvej 17, DK-2100 Copenhagen Ø (Denmark)
2015-07-29
Recently it has been established that torsional Newton-Cartan (TNC) geometry is the appropriate geometrical framework to which non-relativistic field theories couple. We show that when these geometries are made dynamical they give rise to Hořava-Lifshitz (HL) gravity. Projectable HL gravity corresponds to dynamical Newton-Cartan (NC) geometry without torsion and non-projectable HL gravity corresponds to dynamical NC geometry with twistless torsion (hypersurface orthogonal foliation). We build a precise dictionary relating all fields (including the scalar khronon), their transformations and other properties in both HL gravity and dynamical TNC geometry. We use TNC invariance to construct the effective action for dynamical twistless torsional Newton-Cartan geometries in 2+1 dimensions for dynamical exponent 1
Wang, Chun-yu; He, Lin; Li, Yan; Shuai, Chang-geng
2018-01-01
In engineering applications, ship machinery vibration may be induced by multiple rotational machines sharing a common vibration isolation platform and operating at the same time, and multiple sinusoidal components may be excited. These components may be located at frequencies with large differences or at very close frequencies. A multi-reference filtered-x Newton narrowband (MRFx-Newton) algorithm is proposed to control these multiple sinusoidal components in an MIMO (multiple input and multiple output) system, especially for those located at very close frequencies. The proposed MRFx-Newton algorithm can decouple and suppress multiple sinusoidal components located in the same narrow frequency band even though such components cannot be separated from each other by a narrowband-pass filter. Like the Fx-Newton algorithm, good real-time performance is also achieved by the faster convergence speed brought by the 2nd-order inverse secondary-path filter in the time domain. Experiments are also conducted to verify the feasibility and test the performance of the proposed algorithm installed in an active-passive vibration isolation system in suppressing the vibration excited by an artificial source and air compressor/s. The results show that the proposed algorithm not only has comparable convergence rate as the Fx-Newton algorithm but also has better real-time performance and robustness than the Fx-Newton algorithm in active control of the vibration induced by multiple sound sources/rotational machines working on a shared platform.
Physics-based preconditioning and the Newton-Krylov method for non-equilibrium radiation diffusion
International Nuclear Information System (INIS)
Mousseau, V.A.; Knoll, D.A.; Rider, W.J.
2000-01-01
An algorithm is presented for the solution of the time dependent reaction-diffusion systems which arise in non-equilibrium radiation diffusion applications. This system of nonlinear equations is solved by coupling three numerical methods, Jacobian-free Newton-Krylov, operator splitting, and multigrid linear solvers. An inexact Newton's method is used to solve the system of nonlinear equations. Since building the Jacobian matrix for problems of interest can be challenging, the authors employ a Jacobian-free implementation of Newton's method, where the action of the Jacobian matrix on a vector is approximated by a first order Taylor series expansion. Preconditioned generalized minimal residual (PGMRES) is the Krylov method used to solve the linear systems that come from the iterations of Newton's method. The preconditioner in this solution method is constructed using a physics-based divide and conquer approach, often referred to as operator splitting. This solution procedure inverts the scalar elliptic systems that make up the preconditioner using simple multigrid methods. The preconditioner also addresses the strong coupling between equations with local 2 x 2 block solves. The intra-cell coupling is applied after the inter-cell coupling has already been addressed by the elliptic solves. Results are presented using this solution procedure that demonstrate its efficiency while incurring minimal memory requirements
Ooperi valem : Mari Vihmandi "Armastuse valem" / Evi Arujärv
Arujärv, Evi, 1953-
2009-01-01
Argentiina kirjaniku Esther Vilari romaani "Nina Glucksteini matemaatika" ainetel valminud Mari Vihmandi ooperist "Armastuse valem", libreto Maimu Berg, lavastaja Liis Kolle, tantsu- ja liikumisseaded Ana Mondini. Esietendus 17. oktoobril 2008 Rahvusooperis Estonia
Marie Stopes International Child Spacing Clinics in Malawi
African Journals Online (AJOL)
programme, male involvement has the following basic aspects: Initiation of dialogue on child spacing within the ... that men feel that child spacing is also their concern and service providers feel men are not outsiders. ... pioneering work of Marie Stopes in caring for women in the poor communities of London by extending the ...
Revisiting Mary Daly: Towards a quadripartite theological and philosophical paradigm
Directory of Open Access Journals (Sweden)
Hannelie Wood
2015-06-01
Full Text Available I was a tenderfoot in feminist discourse when I started my research on patriarchy, feminism, and Mary Daly. In my thesis, one aspect I engaged was Daly’s battle with gender issues in Christian theology. From the beginning I was troubled by Mary Daly’s views on God, men, and women in her discourse on Christianity. Daly undoubtedly contributed to the discussion on gender issues in the Christian faith, but her focus on androcentrism and her interpretations of Scripture led her to abandon the Christian faith. Mary Daly has written extensively on patriarchy as it is found in religion – particularly in the Christian faith – and how it filters through society. In her critique of patriarchy she set her course to dismantle the facade of a patriarchal and misogynistic God as the root of patriarchy. Daly did not see any positive qualities of the Christian faith and completely rejected other interpretations of a God whose person embraces both male and female qualities. Against this background I will evaluate Daly’s post-Christian feminist theological and philosophical paradigm. I propose that Daly has a quadripartite theological and philosophical paradigm wherein there are four main players. The ‘Who is who’ in Daly’s quadripartite patriarchal theological and philosophical paradigm are the patriarchal male, the patriarchal female, the patriarchal God and the biophilic woman.
Ideas of Physical Forces and Differential Calculus in Ancient India
Girish, T. E.; Nair, C. Radhakrishnan
2010-01-01
We have studied the context and development of the ideas of physical forces and differential calculus in ancient India by studying relevant literature related to both astrology and astronomy since pre-Greek periods. The concept of Naisargika Bala (natural force) discussed in Hora texts from India is defined to be proportional to planetary size and inversely related to planetary distance. This idea developed several centuries prior to Isaac Newton resembles fundamental physical forces in natur...
DYNAMICS OF THIN VISCOUS LAYERS
ROJAS, NICOLAS
2011-01-01
As Isaac Newton discovered in Mechanics, and published in his Principia Mathematica in 1687, inertial effects are essential to describe natural phenomena. In the case of Fluid Dynamics, inertia was included by Claude-Louis Navier and George Gabriel Stokes almost two centuries after in 1822 when calculating the mass and momentum conservation of au infinitesimal fluid elemeut. Although Navier-Stokes equations are very useful for describing any event of any liquid or gas and there...
International Nuclear Information System (INIS)
Whitehead, M.J.; Meaburn, J.; Clayton, C.A.
1989-01-01
Optical observations of the 1-arcmin core of the complex supernova remnant CTB 80 have been made with the Manchester echelle spectrometer, in both its imaging and spectral modes, on the Isaac Newton and William Herschel telescopes. Four 'shells' (A-D) are found in the light of Hα but only the central two of these (A and B) are bright at [N II]. Ionization by shocks of shells with different velocities is implied. (author)
The 1974 Type I supernova in NGC 4414
International Nuclear Information System (INIS)
Patchett, B.; Wood, R.
1976-01-01
Spectra of Miss Burgat's supernova in NGC 4414 were taken with the Isaac Newton 2.5-m reflector during 1974 April and May. The spectra cover the period from just before maximum light to 20 days post-maximum, and show many features typical of Type I supernovae. In addition secondary features in the spectrum indicate the presence of thin shell or filamentary structure. A photographic light curve and direct plate are presented. (author)
ALS5/SPG11/KIAA1840 mutations cause autosomal recessive axonal Charcot-Marie-Tooth disease.
Montecchiani, Celeste; Pedace, Lucia; Lo Giudice, Temistocle; Casella, Antonella; Mearini, Marzia; Gaudiello, Fabrizio; Pedroso, José L; Terracciano, Chiara; Caltagirone, Carlo; Massa, Roberto; St George-Hyslop, Peter H; Barsottini, Orlando G P; Kawarai, Toshitaka; Orlacchio, Antonio
2016-01-01
Charcot-Marie-Tooth disease is a group of hereditary peripheral neuropathies that share clinical characteristics of progressive distal muscle weakness and atrophy, foot deformities, distal sensory loss, as well as diminished tendon reflexes. Hundreds of causative DNA changes have been found, but much of the genetic basis of the disease is still unexplained. Mutations in the ALS5/SPG11/KIAA1840 gene are a frequent cause of autosomal recessive hereditary spastic paraplegia with thin corpus callosum and peripheral axonal neuropathy, and account for ∼ 40% of autosomal recessive juvenile amyotrophic lateral sclerosis. The overlap of axonal Charcot-Marie-Tooth disease with both diseases, as well as the common autosomal recessive inheritance pattern of thin corpus callosum and axonal Charcot-Marie-Tooth disease in three related patients, prompted us to analyse the ALS5/SPG11/KIAA1840 gene in affected individuals with autosomal recessive axonal Charcot-Marie-Tooth disease. We investigated 28 unrelated families with autosomal recessive axonal Charcot-Marie-Tooth disease defined by clinical, electrophysiological, as well as pathological evaluation. Besides, we screened for all the known genes related to axonal autosomal recessive Charcot-Marie-Tooth disease (CMT2A2/HMSN2A2/MFN2, CMT2B1/LMNA, CMT2B2/MED25, CMT2B5/NEFL, ARCMT2F/dHMN2B/HSPB1, CMT2K/GDAP1, CMT2P/LRSAM1, CMT2R/TRIM2, CMT2S/IGHMBP2, CMT2T/HSJ1, CMTRID/COX6A1, ARAN-NM/HINT and GAN/GAN), for the genes related to autosomal recessive hereditary spastic paraplegia with thin corpus callosum and axonal peripheral neuropathy (SPG7/PGN, SPG15/ZFYVE26, SPG21/ACP33, SPG35/FA2H, SPG46/GBA2, SPG55/C12orf65 and SPG56/CYP2U1), as well as for the causative gene of peripheral neuropathy with or without agenesis of the corpus callosum (SLC12A6). Mitochondrial disorders related to Charcot-Marie-Tooth disease type 2 were also excluded by sequencing POLG and TYMP genes. An additional locus for autosomal recessive Charcot-Marie
Eesti animafilm külvab uusi seemneid / Mari-Liis Rebane
Rebane, Mari-Liis
2009-01-01
PÖFFi alafestivalil Animated Dreams linastunud neljast uuest filmist: Olga ja Priit Pärna "Tuukrid vihmas", Kaspar Jancise "Krokodill", Martinus Daane Klemeti "Õhus" ja Girlin Bassovskaja (Jelena Girlin, Mari-Liis Bassovskaja) "Oranus"
Demonstrating Kinematics and Newton's Laws in a Jump
Kamela, Martin
2007-01-01
When students begin the study of Newton's laws they are generally comfortable with static equilibrium type problems, but dynamic examples where forces are not constant are more challenging. The class exercise presented here helps students to develop an intuitive grasp of both the position-velocity-acceleration relation and the force-acceleration…
Gamow on Newton: Another Look at Centripetal Acceleration
Corrao, Christian
2012-01-01
Presented here is an adaptation of George Gamow's derivation of the centripetal acceleration formula as it applies to Earth's orbiting Moon. The derivation appears in Gamows short but engaging book "Gravity", first published in 1962, and is essentially a distillation of Newton's work. While "TPT" contributors have offered several insightful…
Dysfunction in the hip joints in children with Charcot-Marie-Tooth syndrome (literature review
Directory of Open Access Journals (Sweden)
Ivan Yurievich Pozdnikin
2015-09-01
Full Text Available A review of the literature on the treatment of children with dysfunction in the hip joints in motor-sensory neuropathy Charcot-Marie-Tooth is presented. Peculiarities of disease diagnosis and the approach used in the treatment of patients are described. The Charcot-Marie-Tooth syndrome is a hereditary neuromuscular disease characterized by progressive atrophy of the distal muscle group of the lower limbs. According to international authors, the incidence of hip joint dysfunction in this condition is at least 10%, ranking second only to foot deformities. In the Russian literature, the problem has not been adequately interpreted. Early diagnosis of dysfunction in the hip joints during Charcot-Marie-Tooth syndrome is complicated by the child's age and is characterized by progression. Conflicting clinical signs and trivial symptoms of the disease also confuse diagnosis, until it becomes clearer in adolescence or the second or third decade of life. Surgical reconstructive operations on the hip joint often occur too late, and they are accompanied by a greater frequency of neurological complications. Practitioner awareness coupled with an early diagnosis of hip subluxation and decentration and complex orthopedic and neurological examinations of children with the disease of Charcot-Marie-Tooth should result in more favorable outcomes.
Solé, Dirceu; Mallol, Javier; Camelo-Nunes, Inês C; Wandalsen, Gustavo F
2010-02-01
The aim of this study was to evaluate the prevalence of rhinitis-related symptoms among children living in different parts of Latin America (LA) considering all centers involved in ISAAC Phase Three (Ph3). 93,851 children (6-7 yr-old) from 35 centers in 14 LA countries and 165,917 adolescents (13-14 yr-old) from 56 centers in 17 LA countries were enrolled. The mean prevalence rate of current rhinoconjunctivitis was 12.7% and ranged from 5.5% in Rosario City (Argentina) to 21.2% in Caracas (Venezuela) for the schoolchildren. The mean prevalence rate of current rhinoconjunctivitis was 18.5% and ranged from 7.1% in Cuernavaca (México) to 45.1% in Asunción (Paraguay) for the adolescents. These indexes were among the higher observed during ISAAC Ph3. In general the prevalence of rhinitis-related symptoms was higher among the Spanish speaking centers. Environmental risk factors must be evaluated in order to explain the differences observed even in centers from the same country. © 2009 John Wiley & Sons A/S.
Self-adaptive Newton-based iteration strategy for the LES of turbulent multi-scale flows
International Nuclear Information System (INIS)
Daude, F.; Mary, I.; Comte, P.
2014-01-01
An improvement of the efficiency of implicit schemes based on Newton-like methods for the simulation of turbulent flows by compressible LES or DNS is proposed. It hinges on a zonal Self-Adaptive Newton method (hereafter denoted SAN), capable of taking advantage of Newton convergence rate heterogeneities in multi-scale flow configurations due to a strong spatial variation of the mesh resolution, such as transitional or turbulent flows controlled by small actuators or passive devices. Thanks to a predictor of the local Newton convergence rate, SAN provides computational savings by allocating resources in regions where they are most needed. The consistency with explicit time integration and the efficiency of the method are checked in three test cases: - The standard test-case of 2-D linear advection of a vortex, on three different two-block grids. - Transition to 3-D turbulence on the lee-side of an airfoil at high angle of attack, which features a challenging laminar separation bubble with a turbulent reattachment. - A passively-controlled turbulent transonic cavity flow, for which the CPU time is reduced by a factor of 10 with respect to the baseline algorithm, illustrates the interest of the proposed algorithm. (authors)
Deployment of Autonomous GPS Stations in Marie Byrd Land, Antartica
Donnellan, A.; Luyendyk, B.; Smith, M.; Dace, G.
1999-01-01
During the 1998-1999 Antarctic field season, we installed three autonomous GPS stations in Marie Byrd Land, West Antarctica to measure glacio-isostatic rebound and rates of spreading across the West Antartic Rift System.
On topological modifications of Newton's law
International Nuclear Information System (INIS)
Floratos, E.G.; Leontaris, G.K.
2012-01-01
Recent cosmological data for very large distances challenge the validity of the standard cosmological model. Motivated by the observed spatial flatness the accelerating expansion and the various anisotropies with preferred axes in the universe we examine the consequences of the simple hypothesis that the three-dimensional space has a global R 2 × S 1 topology. We take the radius of the compactification to be the observed cosmological scale beyond which the accelerated expansion starts. We derive the induced corrections to the Newton's gravitational potential and we find that for distances smaller than the S 1 radius the leading 1/r-term is corrected by convergent power series of multipole form in the polar angle making explicit the induced anisotropy by the compactified third dimension. On the other hand, for distances larger than the compactification scale the asymptotic behavior of the potential exhibits a logarithmic dependence with exponentially small corrections. The change of Newton's force from 1/r 2 to 1/r behavior implies a weakening of the deceleration for the expanding universe. Such topologies can also be created locally by standard Newtonian axially symmetric mass distributions with periodicity along the symmetry axis. In such cases we can use our results to obtain measurable modifications of Newtonian orbits for small distances and flat rotation spectra, for large distances at the galactic level
Jehaes, E; Decorte, R; Peneau, A; Petrie, J H; Boiry, P A; Gilissen, A; Moisan, J P; Van den Berghe, H; Pascal, O; Cassiman, J J
1998-01-01
Carl Wilhelm Naundorff was buried in 1845 in Delft as Louis Charles, Duc de Normandie, 'Louis XVII'. However, the son of Louis XVI and Marie-Antoinette-Louis XVII--officially died in the Temple of Paris in 1795. In order to resolve the identity of Naundorff, mitochondrial DNA (mtDNA) D-loop sequences of his remains were compared with the sequences obtained from the hairs of two sisters of Marie-Antoinette, Marie-Antoinette herself, and with the sequences obtained from DNA samples of two living maternal relatives. The mtDNA sequence of a bone sample from Naundorff showed two nucleotide differences from the sequences of the three sisters and four differences from the sequences of living maternal relatives. Based on this evidence it becomes very unlikely that Naundroff is the son of Marie-Antoinette.
Special relativity, electrodynamics, and general relativity from Newton to Einstein
Kogut, John B
2018-01-01
Special Relativity, Electrodynamics and General Relativity: From Newton to Einstein, Second Edition, is intended to teach (astro)physics, astronomy, and cosmology students how to think about special and general relativity in a fundamental, but accessible, way. Designed to render any reader a "master of relativity," everything on the subject is comprehensible and derivable from first principles. The book emphasizes problem solving, contains abundant problem sets, and is conveniently organized to meet the needs of both student and instructor. Fully revised, updated and expanded second edition Includes new chapters on magnetism as a consequence of relativity and electromagnetism Contains many improved and more engaging figures Uses less algebra resulting in more efficient derivations Enlarged discussion of dynamics and the relativistic version of Newton's second law
Newton's Law: Not so Simple after All
Robertson, William C.; Gallagher, Jeremiah; Miller, William
2004-01-01
One of the most basic concepts related to force and motion is Newton's first law, which essentially states, "An object at rest tends to remain at rest unless acted on by an unbalanced force. An object in motion in a straight line tends to remain in motion in a straight line unless acted upon by an unbalanced force." Judging by the time and space…
2017-2018 Travel Expense Reports for Mary Anne Chambers ...
International Development Research Centre (IDRC) Digital Library (Canada)
Chantal Taylor
Ottawa. Airfare: $368.41. Other. Transportation: $69.95. Accommodation: $542.79. Meals and. Incidentals: $164.42. Other: $0.00. Total: $1,145.57. Comments: From residence in Thornhill, Ontario. 2017-2018 Travel Expense Reports for Mary. Anne Chambers, Governor, Chairperson of the. Human Resources Committee.
2017-2018 Travel Expense Reports for Mary Anne Chambers ...
International Development Research Centre (IDRC) Digital Library (Canada)
Chantal Taylor
Ottawa. Airfare: $563.72. Other. Transportation: $74.26. Accommodation: $0.00. Meals and. Incidentals: $46.17. Other: $30.00. Total: $714.15. Comments: From residence in Thornhill, Ontario. 2017-2018 Travel Expense Reports for Mary. Anne Chambers, Governor, Chairperson of the. Human Resources Committee.
Two wives in science service: Marie Curie and Irene Joliot-Curie
International Nuclear Information System (INIS)
Bordry, M.
1996-01-01
This paper relates the life and the scientific works of Marie Curie and of her daughter Irene Joliot-Curie in their historical context. Several details are given about their laboratory works, their relations with students, the creation of the Radium Institute and the role they played during the two world wars. The progress of their works towards their main scientific discoveries (polonium, radium, artificial radioactivity, transuranium compounds etc..) is illustrated with some extracts of their personal correspondence with relatives. The paper evokes also the Nobel prices received by Pierre and Marie Curie and by Irene and Frederic Joliot and the creation of the CEA by Frederic Joliot in 1946. (J.S.). 6 photos
Anneli Remme soovitab : Kuninganna Mary elu ja surm / Anneli Remme
Remme, Anneli, 1968-
2002-01-01
Kontserdisarja "Hingemuusika" teist kontserti raamivad Henry Purcelli teosed, millest esimene on loodud kuninganna Mary sünnipäevaks, viimane matusetseremooniaks. Barokkansambli Corelli Consort esituses 26., 27., ja 28. apr. Viljandi, Tartu ja Tallinna kirikutes
Laurent Guiraud
2000-01-01
A CD with the wishes for the 21st century from thousands of readers of the science magazine "Newton", was buried at the Atlas construction site on 16.03.2000 (handling the CD: Giorgio Riviecco, Editor of "Newton")
Newton's 'Principia Mathematica Philosophia' and Planck's elementary constants
International Nuclear Information System (INIS)
Rompe, R.; Treder, H.J.
1987-01-01
Together with Planck's elementary constants Newton's principles prove a guaranteed basis of physics and 'exact' sciences of all directions. The conceptions in physics are competent at all physical problems as well as technology too. Classical physics was founded in such a way to reach far beyond the physics of macroscopic bodies. (author)
Directory of Open Access Journals (Sweden)
Voß Rebekka
2015-03-01
Full Text Available This special section examines Isaac Wetzlar‘s Love Letter, a Yiddish proposal for the improvement of Jewish society, written in 1748/49 in Northern Germany. The articles concentrate on the links between Libes briv and the contours of German Pietism in order to initiate exploration of the complex relationship between Central European Judaism and eighteenth-century Pietism. This largely unrecognized arena of Jewish-Christian encounter is presented as a significant factor in a century that promoted modernity
Gauld, Colin F.
2009-01-01
Books I and III of Newton's "Principia" develop Newton's dynamical theory and show how it explains a number of celestial phenomena. Book II has received little attention from historians or educators because it does not play a major role in Newton's argument. However, it is in Book II that we see most clearly Newton both as a theoretician and an…
Mary's Story: A Curriculum for Teaching Medical Terminology.
Pennsylvania State Univ., University Park. Inst. for the Study of Adult Literacy.
This packet of materials for a class on medical terminology consists of a collection of stories with highlighted vocabulary, teacher's guide, and student's guide. The materials teach medical terms in a series of stories about a woman named Mary Consola. Each story begins with a list of word parts that will be learned; after the story, new word…
Decentralized Quasi-Newton Methods
Eisen, Mark; Mokhtari, Aryan; Ribeiro, Alejandro
2017-05-01
We introduce the decentralized Broyden-Fletcher-Goldfarb-Shanno (D-BFGS) method as a variation of the BFGS quasi-Newton method for solving decentralized optimization problems. The D-BFGS method is of interest in problems that are not well conditioned, making first order decentralized methods ineffective, and in which second order information is not readily available, making second order decentralized methods impossible. D-BFGS is a fully distributed algorithm in which nodes approximate curvature information of themselves and their neighbors through the satisfaction of a secant condition. We additionally provide a formulation of the algorithm in asynchronous settings. Convergence of D-BFGS is established formally in both the synchronous and asynchronous settings and strong performance advantages relative to first order methods are shown numerically.
2016-2017 Travel Expense Reports for Mary Anne Chambers ...
International Development Research Centre (IDRC) Digital Library (Canada)
Beata Bialic
Date(s):. 2016-07-06. Destination(s):. Ottawa. Airfare: $482.11. Other. Transportation: $64.30. Accommodation: $0.00. Meals and. Incidentals: $25.28. Other: $0.00. Total: $571.69. Comments: 2016-2017 Travel Expense Reports for Mary. Anne Chambers, Governor, Chairperson of the. Human Resources Committee.
Female body as a fetish in Helmut Newton's photography
Directory of Open Access Journals (Sweden)
Pantović Katarina
2017-01-01
Full Text Available The paper illuminates some of the principles by which Helmut Newton's photographic poetics functions. It is examined from the perspectives of recent art history, feminist critique and psychoanalytic theory. His photographs came to a standstill not far from pornography, yet they stayed within the jet-set community, reflecting at the same time the sexual revolution in the 60s and 70s of the twentieth century and the rising of the fashion and film industries and other Western emancipatory movements. Newton's obscure photojournalism provoked conventions, presenting the female body as a fetish and object of erotic pleasure, affirming, nonetheless, a new feminine self-consciousness and freedom. Thus, he constituted modern eroticism by connecting fetishism, voyeurism and sadomasochism, creating a provocative hybrid photography that embraced fashion, eroticism and portrait, hence documenting, in highly stylistic manner, the decadency and eccentricity of the lifestyle of the rich.
Stabilized quasi-Newton optimization of noisy potential energy surfaces
Energy Technology Data Exchange (ETDEWEB)
Schaefer, Bastian; Goedecker, Stefan, E-mail: stefan.goedecker@unibas.ch [Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland); Alireza Ghasemi, S. [Institute for Advanced Studies in Basic Sciences, P.O. Box 45195-1159, IR-Zanjan (Iran, Islamic Republic of); Roy, Shantanu [Computational and Systems Biology, Biozentrum, University of Basel, CH-4056 Basel (Switzerland)
2015-01-21
Optimizations of atomic positions belong to the most commonly performed tasks in electronic structure calculations. Many simulations like global minimum searches or characterizations of chemical reactions require performing hundreds or thousands of minimizations or saddle computations. To automatize these tasks, optimization algorithms must not only be efficient but also very reliable. Unfortunately, computational noise in forces and energies is inherent to electronic structure codes. This computational noise poses a severe problem to the stability of efficient optimization methods like the limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm. We here present a technique that allows obtaining significant curvature information of noisy potential energy surfaces. We use this technique to construct both, a stabilized quasi-Newton minimization method and a stabilized quasi-Newton saddle finding approach. We demonstrate with the help of benchmarks that both the minimizer and the saddle finding approach are superior to comparable existing methods.
On Newton's third law and its symmetry-breaking effects
International Nuclear Information System (INIS)
Pinheiro, Mario J
2011-01-01
The law of action-reaction, considered by Ernst Mach as the cornerstone of physics, is thoroughly used to derive the conservation laws of linear and angular momentum. However, the conflict between momentum conservation law and Newton's third law, on experimental and theoretical grounds, calls for more attention. We give a background survey of several questions raised by the action-reaction law and, in particular, the role of the physical vacuum is shown to provide an appropriate framework for clarifying the occurrence of possible violations of the action-reaction law. Then, in the framework of statistical mechanics, using a maximizing entropy procedure, we obtain an expression for the general linear momentum of a body particle. The new approach presented here shows that Newton's third law is not verified in systems out of equilibrium due to an additional entropic gradient term present in the particle's momentum.
Stabilized quasi-Newton optimization of noisy potential energy surfaces
International Nuclear Information System (INIS)
Schaefer, Bastian; Goedecker, Stefan; Alireza Ghasemi, S.; Roy, Shantanu
2015-01-01
Optimizations of atomic positions belong to the most commonly performed tasks in electronic structure calculations. Many simulations like global minimum searches or characterizations of chemical reactions require performing hundreds or thousands of minimizations or saddle computations. To automatize these tasks, optimization algorithms must not only be efficient but also very reliable. Unfortunately, computational noise in forces and energies is inherent to electronic structure codes. This computational noise poses a severe problem to the stability of efficient optimization methods like the limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm. We here present a technique that allows obtaining significant curvature information of noisy potential energy surfaces. We use this technique to construct both, a stabilized quasi-Newton minimization method and a stabilized quasi-Newton saddle finding approach. We demonstrate with the help of benchmarks that both the minimizer and the saddle finding approach are superior to comparable existing methods
Newton, Isaac
1995-01-01
Sir Isaac Newton's Principia Mathematica (Mathematical Principles) (1687) is considered to be among the finest scientific works ever published. His grand unifying idea of gravitation, with effects extending throughout the solar system, explains by one principle such diverse phenomena as the tides, the precession of the equinoxes, and the irregularities of the moon's motion. Newton's brilliant and revolutionary contributions to science explained the workings of a large part of inanimate nature mathematically and suggested that the remainder might be understood in a similar fashion. By taking known facts, forming a theory that explained them in mathematical terms, deducing consequences from the theory, and comparing the results with observed and experimental facts, Newton united, for the first time, the explication of physical phenomena with the means of prediction. By beginning with the physical axioms of the laws of motion and gravitation, he converted physics from a mere science of explanation into a genera...
1970. aastatel alustas arhitektidest sõprade ja kolleegide rühm... / Mari Laanemets
Laanemets, Mari, 1975-
2008-01-01
27.VI avatakse Eesti Arhitektuurimuuseumis Rotermanni soolalaos 1970. ja 1980. alguse eksperimentaalset arhitektuuripraktikat käsitlev näitus "Keskkond, objektid, kontseptsioonid. Tallinna kooli arhitektid 1972-1985". Näha saab Ülevi Eljandi, Ignar Fjuki, Veljo Kaasiku, Tiit Kaljundi, Vilen Künnapu, Leonhard Lapini, Avo-Himm Looveere, Kristin-Mari Looveere, Marika Lõokese, Jüri Okase, Jaan Olliku, Ain Padriku, Toomas Reinu, Andres Ringo, Sirje Runge, Harry Sheini, Tõnis Vindi ja Matti Õunapuu töid. Näituse kuraatorid Andres Kurg ja Mari Laanemets. Samas: "Uue arhitektuuri näituse programm" (1972)
Newton's second law in a non-commutative space
International Nuclear Information System (INIS)
Romero, Juan M.; Santiago, J.A.; Vergara, J. David
2003-01-01
In this Letter we show that corrections to Newton's second law appear if we assume a symplectic structure consistent with the commutation rules of the non-commutative quantum mechanics. For central field we find that the correction term breaks the rotational symmetry. For the Kepler problem, this term is similar to a Coriolis force
Kunsti kuumtöötlus Läti aladel / Mari Sobolev
Sobolev, Mari, 1968-
2004-01-01
Pedvale vabaõhumuuseumis toimunud rahvusvahelisest workshop'ist teemal "Kompost", mille tulemusi presenteeriti 6. VIII 2004. Ignas Kazakeviciuse, Jurate Rakeviciute, Diana Dimzha-Dime, Ule Björn Gundermanni, Remo Randveri, Maris Grosbahsi, Andrus Joonase töödest
Has ESA's XMM-Newton cast doubt over dark energy?
2003-12-01
Galaxy cluster RXJ0847 hi-res Size hi-res: 100k Galaxy cluster RXJ0847 The fuzzy object at the centre of the frame is one of the galaxy clusters observed by XMM-Newton in its investigation of the distant Universe. The cluster, designated RXJ0847.2+3449, is about 7 000 million light years away, so we see it here as it was 7 000 million years ago, when the Universe was only about half of its present age. This cluster is made up of several dozen galaxies. Observations of eight distant clusters of galaxies, the furthest of which is around 10 thousand million light years away, were studied by an international group of astronomers led by David Lumb of ESA's Space Research and Technology Centre (ESTEC) in the Netherlands. They compared these clusters to those found in the nearby Universe. This study was conducted as part of the larger XMM-Newton Omega Project, which investigates the density of matter in the Universe under the lead of Jim Bartlett of the College de France. Clusters of galaxies are prodigious emitters of X-rays because they contain a large quantity of high-temperature gas. This gas surrounds galaxies in the same way as steam surrounds people in a sauna. By measuring the quantity and energy of X-rays from a cluster, astronomers can work out both the temperature of the cluster gas and also the mass of the cluster. Theoretically, in a Universe where the density of matter is high, clusters of galaxies would continue to grow with time and so, on average, should contain more mass now than in the past. Most astronomers believe that we live in a low-density Universe in which a mysterious substance known as 'dark energy' accounts for 70% of the content of the cosmos and, therefore, pervades everything. In this scenario, clusters of galaxies should stop growing early in the history of the Universe and look virtually indistinguishable from those of today. In a paper soon to be published by the European journal Astronomy and Astrophysics, astronomers from the XMM-Newton