Newton’s Laws of Motion

2020 ◽  
Author(s):  
George E. Smith
Keyword(s):  
Crucial Role ◽  
Planetary System ◽  
Historical Background ◽  
Christiaan Huygens ◽  
History Of ◽  
Newton’S Laws ◽  
Laws Of Motion ◽  
John Wallis ◽  
Christopher Wren

An obstacle to reading the Principia is presuming that the Laws of Motion attributed to Newton in physics textbooks, and the concept of force in them, are the same as those in the book; they are not. This chapter provides an account of his Laws and his conception of force as his contemporaries would have understood them. It does so first by giving the historical background to them in works by Descartes, Christiaan Huygens, John Wallis, and Christopher Wren; and then by reviewing the history of Newton’s own reformulations of them not just in the sequence of manuscripts leading up to the first edition, but extending even to the second edition. In the Principia the Laws serve as the basis for deriving conclusions about forces governing the motions in our planetary system from the motions of the bodies within it “among themselves.” Crucial to their doing so are their six Corollaries, some of them initially formulated as Laws. The history of their development too is covered in parallel with that of the Laws, emphasizing their crucial role in licensing those inferences regarding forces from the observed motions.

scholarly journals A história do problema das colisões na física do século XVII anterior a Newton

2020 ◽  
Vol 42 ◽  
Author(s):  
Claudio Maia Porto
Keyword(s):  
Christiaan Huygens ◽  
John Wallis ◽  
Christopher Wren

Resumo Este trabalho traça um panorama histórico do tratamento do problema das colisões ao longo do século XVII, até que se chegasse à grande síntese mecânica de Newton. Apresentamos primeiramente as abordagens pioneiras de Thomas Harriot e Isaac Beeckman. Em seguida, passamos à tentativa de solução do problema por Descartes, apresentando resumidamente os seus fundamentos filosóficos e a construção sistemática por ele buscada, que, enfim, se mostrou errada. Passamos, então, à análise das formulações propostas por Christopher Wren, John Wallis e Christiaan Huygens, todas elas atingindo resultados corretos, ainda que de aplicação restrita. Procuramos ressaltar as particularidades de cada uma dessas elaborações, destacando a introdução pioneira na física do uso de número negativos na determinação do sentido do movimento, efetuada por Wren e Wallis, e o caráter extremamente sistêmico do pensamento mecânico de Huygens, construindo sua solução a partir da aplicação de princípios físicos fundamentais, alguns já conhecidos e outros por ele esboçados.

Illustrations and the genesis of Barrett and Yonge's Collins pocket guide to the sea shore (1958)

2010 ◽  
Vol 37 (2) ◽  
pp. 274-291 ◽  
Author(s):  
P. G. Moore
Keyword(s):  
Crucial Role ◽  
British Isles ◽  
Publishing History ◽  
Biological Station ◽  
Marine Biological ◽  
Illustrated Text ◽  
History Of ◽  
The University

Twenty nine items of correspondence from the mid-1950s discovered recently in the archives of the University Marine Biological Station Millport, and others made available by one of the illustrators and a referee, shed unique light on the publishing history of Collins pocket guide to the sea shore. This handbook, generally regarded as a classic of its genre, marked a huge step forwards in 1958; providing generations of students with an authoritative, concise, affordable, well illustrated text with which to identify common organisms found between the tidemarks from around the coasts of the British Isles. The crucial role played by a select band of illustrators in making this publication the success it eventually became, is highlighted herein. The difficulties of accomplishing this production within commercial strictures, and generally as a sideline to the main employment of the participants, are revealed. Such stresses were not helped by changing demands on the illustrators made by the authors and by the publishers.

Introduction

2017 ◽  
Author(s):  
Henk W. de Regt
Keyword(s):  
Quantum Mechanics ◽  
History Of Science ◽  
Crucial Role ◽  
Scientific Understanding ◽  
Related Question ◽  
History Of ◽  
Human Desire ◽  
Exciting Project ◽  
Understanding Science ◽  
The Way

This chapter introduces the theme of the book: scientific understanding. Science is arguably the most successful product of the human desire for understanding. Reflection on the nature of scientific understanding is an important and exciting project for philosophers of science, as well as for scientists and interested laypeople. As a first illustration of this, the chapter sketches an episode from the history of science in which discussions about understanding played a crucial role: the genesis of quantum mechanics in the 1920s, and the heated debates about the intelligibility of this theory and the related question of whether it can provide understanding. This case shows that standards of intelligibility of scientists can vary strongly. Furthermore, the chapter outlines and defends the way in which this study approaches its subject, differing essentially from mainstream philosophical discussions of explanatory understanding. It concludes with an overview of the contents of the book.

Drifting Through a Planetary System

2018 ◽  
Author(s):  
Karel Schrijver
Keyword(s):  
Seventeenth Century ◽  
Solar System ◽  
Virtual Worlds ◽  
Planetary System ◽  
System P ◽  
History Of ◽  
Or Team ◽  
Water Contents

This chapter describes how the first found exoplanets presented puzzles: they orbited where they should not have formed or where they could not have survived the death of their stars. The Solar System had its own puzzles to add: Mars is smaller than expected, while Venus, Earth, and Mars had more water—at least at one time—than could be understood. This chapter shows how astronomers worked through the combination of these puzzles: now we appreciate that planets can change their orbits, scatter water-bearing asteroids about, steal material from growing planets, or team up with other planets to stabilize their future. The special history of Jupiter and Saturn as a pair bringing both destruction and water to Earth emerged from the study of seventeenth-century resonant clocks, from the water contents of asteroids, and from experiments with supercomputers imposing the laws of physics on virtual worlds.

The Gospel as Manuscript

2020 ◽  
Author(s):  
Chris Keith
Keyword(s):  
Crucial Role ◽  
Literary Tradition ◽  
Reception History ◽  
Early History ◽  
First Century ◽  
Interdisciplinary Work ◽  
The Public ◽  
History Of ◽  
New Material ◽  
Material History

This book offers a new material history of the Jesus tradition. It shows that the introduction of manuscripts to the transmission of the Jesus tradition played an underappreciated but crucial role in the reception history of the tradition that eventuated. It focuses particularly on the competitive textualization of the Jesus tradition, whereby Gospel authors drew attention to the written nature of their tradition, sometimes in attempts to assert superiority to predecessors, and the public reading of the Jesus tradition. Both these processes reveal efforts on the part of early followers of Jesus to place the gospel-as-manuscript on display, whether in the literary tradition or in the assembly. Building upon interdisciplinary work on ancient book cultures, this book traces an early history of the gospel as artifact from the textualization of Mark in the first century until the eventual usage of liturgical reading as a marker of authoritative status in the second and third centuries and beyond. Overall, it reveals a vibrant period of the development of the Jesus tradition, wherein the material status of the tradition frequently played as important a role as the ideas about Jesus that it contained.

scholarly journals Silent Accord: Qi 契 as a Metaphor for Enlightenment and Transmission in Chan Buddhist Discourse

Religions ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 279
Author(s):  
Aleksi Järvelä ◽  
Tero Tähtinen
Keyword(s):  
Song Dynasty ◽  
Tang Dynasty ◽  
Historical Background ◽  
The Song Dynasty ◽  
History Of

In this paper, we explore the historical background and the semantic underpinnings of a central, if marginally treated, metaphor of enlightenment and transmission in Chan discourse, “silent accord” 默契. It features centrally in Essentials of the Transmission of Mind 傳心法要, a text that gathers the teachings of Chan master Huangbo Xiyun (d. ca. 850), a major Tang dynasty figure. “Silent accord” is related to the concept of mind-to-mind transmission, which lies at the very core of Chan Buddhist self-understanding. However, Chan historiography has shown that this self-understanding was partially a product of the Song dynasty lineage records, historically retroactive syncretic constructs produced by monks and literati as efforts towards doctrinal and political recognition and orthodoxy. There are thus lacunae in the history of Chan thought opened up by the retrospective fictions of Song dynasty, and a lack of reliable, dateable documents from the preceding Tang dynasty era, possibly fraught with later additions. We situate the metaphor “silent accord” in the history of Chan thought by searching for its origins, mapping its functions in Chan literature, arguing for its influence and thereby its role in helping to bridge the 9th century gap.

scholarly journals The Danger of Analogical Myths: Explaining the Power and Consequences of the Sykes-Picot Delusion

AJIL Unbound ◽  
2016 ◽  
Vol 110 ◽  
pp. 132-136 ◽  
Author(s):  
Toby Dodge
Keyword(s):  
United States ◽  
Middle East ◽  
The United States ◽  
Historical Background ◽  
Minor Role ◽  
Historical Significance ◽  
Historical Analogy ◽  
History Of ◽  
Political Units ◽  
Postcolonial States

Even before its hundredth year anniversary on 16 May 2016, the Sykes-Picot agreement had become a widely cited historical analogy both in the region itself and in Europe and the United States. In the Middle East, it is frequently deployed as an infamous example of European imperial betrayal and Western attempts more generally to keep the region divided, in conflict, and easy to dominate. In Europe and the United States, however, its role as a historical analogy is more complex—a shorthand for understanding the Middle East as irrevocably divided into mutually hostile sects and clans, destined to be mired in conflict until another external intervention imposes a new, more authentic, set of political units on the region to replace the postcolonial states left in the wake of WWI. What is notable about both these uses of the Sykes-Picot agreement is that they fundamentally misread, and thus overstate, its historical significance. The agreement reached by the British diplomat Mark Sykes and his French counterpart, François Georges-Picot, in May 1916, quickly became irrelevant as the realities on the ground in the Middle East, U.S. intervention into the war, a resurgent Turkey and the comparative weakness of the French and British states transformed international relations at the end of the First World War. Against this historical background, explaining the contemporary power of the narrative surrounding the use of the Sykes-Picot agreement becomes more intellectually interesting than its minor role in the history of European imperial interventions in the Middle East.

scholarly journals History of sports medicine in east European countries

2015 ◽  
Vol 68 (1-2) ◽  
pp. 59-65
Author(s):  
Biljana Lazovic ◽  
Sanja Mazic ◽  
Marina Djelic ◽  
Jelena Suzic-Lazic ◽  
Radmila Sparic ◽  
...  
Keyword(s):  
Sports Medicine ◽  
Medical Knowledge ◽  
European Countries ◽  
Historical Background ◽  
Eastern European ◽  
Cultural Changes ◽  
East European ◽  
Psychological Pressure ◽  
History Of ◽  
Eastern European Countries

The purpose of this article is to provide a historical background of medicine, science and sports with the focus on the development of modern sports medicine in European countries, with an accent on Eastern European countries that have a long sports medicine tradition. The development of modern sports medicine began at the end of 19th and the beginning of 20th century, and it has been associated with social and cultural changes in the world of medicine, science and sports. Advanced medical knowledge, skills and practices, and the progress of scientific achievements enabled sports people to improve their performance level. Increased popularisation and commercialisation of sports have resulted from urbanization and city lifestyle, leading to the lack of physical activity and increased psychological pressure. In addition, the growing need and interest in sports and successes in professional sports have become a symbol of international recognition and prestige for the nations.

Progressive Mucinous Histiocytosis: Importance of Electron Microscopy to Confirm Diagnosis

2010 ◽  
Vol 14 (5) ◽  
pp. 245-248 ◽  
Author(s):  
Iman Hemmati ◽  
W. Alastair McLeod ◽  
Richard I. Crawford
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Clinical Examination ◽  
Crucial Role ◽  
Langerhans Cell Histiocytosis ◽  
Langerhans Cell ◽  
History Of ◽  
Characteristic Features ◽  
Immunohistochemical Studies

Background: Progressive mucinous histiocytosis (PMH) is a benign, non-Langerhans cell histiocytosis with characteristic ultrastructural features that can be used for diagnosis. Once an important tool in dermatologic diagnosis, electron microscopy has been largely replaced by immunohistochemistry and immunofluorescence techniques today. However, electron microscopy occasionally still plays a crucial role in the diagnosis of dermatologic conditions. We report a case of PMH as an example of a dermatologic disorder that requires electron microscopy for its diagnosis. Methods: A 60-year-old woman presented to our clinic with a history of small, sharply demarcated, skin-colored papules ranging from 2 to 5 mm in diameter distributed over the arms, forearms, and dorsal hands. The results of light microscopy, immunohistochemical studies, and clinical examination were inconclusive. Another biopsy for electron microscopy showed the characteristic features of PMH. Conclusion: This case demonstrates that a dermatopathology service still needs to have access to electron microscopy for diagnostic purposes to successfully diagnose a small number of rare conditions.

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