scholarly journals Composição histórica da teoria eletrofraca: da reformulação V-A à detecção dos bósons W+, W- e Z0

2021 ◽  
Vol 7 (1) ◽  
pp. 57
Author(s):  
Marcia da Costa ◽  
Irinéa de Lourdes Batista

Este trabalho tem o objetivo de apresentar uma Composição Histórica a respeito de estudos que culminaram na elaboração da teoria de unificação das interações eletromagnéticas e fracas, a Teoria Eletrofraca. Entende-se que as contribuições teóricas e experimentais envolvidas nesse processo constituíram novos rumos para a Física de Partículas daquela época e elucidaram questões relevantes para o entendimento da estrutura da matéria. Neste artigo, serão apresentados estudos que partem da Teoria V-A, apresentam as primeiras hipóteses de bósons mediadores para a interação fraca, possíveis relações entre as interações fracas e eletromagnéticas, e as contribuições teóricas e experimentais que consolidaram a Teoria Eletrofraca.  Este artigo foi elaborado com base em encaminhamentos metodológicos de pesquisas em História da Ciência e pressupostos da elaboração de uma Composição Histórica, considerando fontes primárias e seguindo os princípios de inteligibilidade, valores cognitivos e fidedignidade, que resultam em um material que reúne elementos históricos, epistemológicos, axiológicos e científicos para a inteligibilidade de um conteúdo científico com objetivos pedagógicos e de disseminação de conhecimentos.Historical composition of electroweak theory: from V-A reformulation to detection of W+, W- and Z0 bosonsAbstractThis paper aims to present a Historical Composition about studies that culminated in the elaboration of the theory of unification of weak and electromagnetic interactions, the Electroweak Theory. It is understood that the theoretical and experimental contributions involved in this process constitute new directions for Particle Physics of that time and clarified relevant issues for the understanding of the structure of matter. In this article we will present studies that depart from Theory V-A, present the first hypothesis of mediating bosons for the weak interaction, possible relations between weak and electromagnetic interactions, and the theoretical and experimental contributions that consolidated the Electro-Theory Theory. This article was elaborated based on methodological referrals of research in History of Science and assumptions of the elaboration of a Historical Composition, considering primary sources and following the principles of intelligibility, cognitive values and reliability, which result in a material that brings together historical, epistemological elements axiological and scientific for the intelligibility of a scientific content with pedagogical purpose and knowledge dissemination.Keywords: Electroweak theory; Historical composition; Unification; Historical experiments.

Author(s):  
Jed Z. Buchwald ◽  
Mordechai Feingold

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. This book 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. The book reveals 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 during Newton’s earliest years at Cambridge that he developed the core of his singular method for generating and working with trustworthy knowledge, which he applied to his study of the past with the same rigor he brought to his work in physics and mathematics. Drawing extensively on Newton’s unpublished papers and a host of other primary sources, the book reconciles Isaac Newton the rational scientist with Newton the natural philosopher, alchemist, theologian, and chronologist of ancient history.


Author(s):  
Begüm Tuğlu

Feminist authors have long been trying to alter the patriarchal structure of the Western society through different aspects. One of these aspects, if not the strongest, is the struggle to overcome centuries long dominance of male authors who have created a masculine history, culture and literature. As recent works of women authors reveal, the strongest possibility of actually achieving an equalitarian society lies beneath the chance of rewriting the history of Western literature. Since the history of Western literature relies on dichotomies that are reminiscences of modernity, the solution to overcome the inequality between the two sexes seems to be to rewrite the primary sources that have influenced the cultural heritage of literature itself. The most dominant dichotomies that shape this literary heritage are represented through the bonds between the concepts of women/man and nature/culture. As one of the most influential epics that depict these dichotomies, Homer's Odysseus reveals how poetry strengthens the authority of the male voice. In order to define the ideal "man", Homer uses a wide scope of animal imagery while forming the identities of male characters. Margaret Atwood, on the other hand, is not contended with Homer's poem in that it never narrates the story from the side of women. As a revisionist mythmaker, Atwood takes the famous story of Odysseus, yet this time presents it from the perspective of Penelope, simultaneously playing on the animal imagery. Within this frame, I intend to explore in this paper how the animal imagery in Homer's most renowned Odysseus functions as a reinforcing tool in the creation of masculine identities and how Margaret Atwood's The Penelopiad defies this formation of identities with the aim of narrating the story from the unheard side, that of the women who are eminently present yet never heard.


Author(s):  
Thomas H. McCall ◽  
Keith D. Stanglin

“Arminianism” was the subject of important theological controversies in the seventeenth and eighteenth centuries, and it maintains an important position within Protestant thought. What became known as “Arminian” theology was held by people across a swath of geographical and ecclesial positions; it developed in European, British, and American contexts, and it engaged with a wide range of intellectual challenges. While standing together in their common rejection of several key planks of Reformed theology, proponents of Arminianism took various positions on other matters. Some were broadly committed to catholic and creedal theology; others were more open to theological revision. Some were concerned primarily with practical concerns; others were engaged in system building as they sought to articulate and defend an overarching vision of God and the world. The story of this development is both complex and important for a proper understanding of the history of Protestant theology. However, this historical development of Arminian theology is not well known. In this book, Thomas H. McCall and Keith D. Stanglin offer a historical introduction to Arminian theology as it developed in modern thought, providing an account that is based upon important primary sources and recent secondary research that will be helpful to scholars of ecclesial history and modern thought as well as comprehensible and relevant for students.


Author(s):  
Travis D. Stimeling

Nashville Cats: Record Production in Music City, 1945–1975 is the first history of record production during country music’s so-called Nashville Sound era. This period of country music history produced some of the genre’s most celebrated recording artists, including Country Music Hall of Fame inductees Patsy Cline, Jim Reeves, and Floyd Cramer, and marked the establishment of a recording industry that has come to define Nashville in the national and international consciousness. Yet, despite country music’s overwhelming popularity during this period and the continued legacy of the studios that were built in Nashville during the 1950s and 1960s, little attention has been given to the ways in which recording engineers, session musicians, and record producers shaped the sounds of country music during the time. Drawing upon a rich array of previously unexplored primary sources, Nashville Cats: Record Production in Music City, 1945–1975 is the first book to take a global view of record production in Nashville during the three decades that the city’s musicians established the city as the leading center for the production and distribution of country music.


2019 ◽  
Vol 11 (2) ◽  
pp. 324-333
Author(s):  
Tobias Kelly

Abstract This short essay offers a broad and necessarily incomplete review of the current state of the human rights struggle against torture and ill-treatment. It sketches four widespread assumptions in that struggle: 1) that torture is an issue of detention and interrogation; 2) that political or security detainees are archetypal victims of torture; 3) that legal reform is one of the best ways to fight torture; and 4) that human rights monitoring helps to stamp out violence. These four assumptions have all played an important role in the history of the human rights fight against torture, but also resulted in limitations in terms of the interventions that are used, the forms of violence that human rights practitioners respond to, and the types of survivors they seek to protect. Taken together, these four assumptions have created challenges for the human rights community in confronting the multiple forms of torture rooted in the deep and widespread inequality experienced by many poor and marginalized groups. The essay ends by pointing to some emerging themes in the fight against torture, such as a focus on inequality, extra-custodial violence, and the role of corruption.


Symmetry ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1323 ◽  
Author(s):  
G. Jordan Maclay

Understanding the hydrogen atom has been at the heart of modern physics. Exploring the symmetry of the most fundamental two body system has led to advances in atomic physics, quantum mechanics, quantum electrodynamics, and elementary particle physics. In this pedagogic review, we present an integrated treatment of the symmetries of the Schrodinger hydrogen atom, including the classical atom, the SO(4) degeneracy group, the non-invariance group or spectrum generating group SO(4,1), and the expanded group SO(4,2). After giving a brief history of these discoveries, most of which took place from 1935–1975, we focus on the physics of the hydrogen atom, providing a background discussion of the symmetries, providing explicit expressions for all of the manifestly Hermitian generators in terms of position and momenta operators in a Cartesian space, explaining the action of the generators on the basis states, and giving a unified treatment of the bound and continuum states in terms of eigenfunctions that have the same quantum numbers as the ordinary bound states. We present some new results from SO(4,2) group theory that are useful in a practical application, the computation of the first order Lamb shift in the hydrogen atom. By using SO(4,2) methods, we are able to obtain a generating function for the radiative shift for all levels. Students, non-experts, and the new generation of scientists may find the clearer, integrated presentation of the symmetries of the hydrogen atom helpful and illuminating. Experts will find new perspectives, even some surprises.


2021 ◽  
pp. 103985622110142
Author(s):  
Phil Maude

Objective: To examine the history of Fremantle, Western Australia’s first purpose-built asylum. Method: A range of primary sources were consulted. Results: Fremantle was opened in 1865 to house inmates away from the populace and for the most part under the care of Dr HC Barnett. Attendants as well as inmates were occupied with work roles that kept the asylum functioning cost effectively. Conclusion: Within 15 years, the structure was neglected and overcrowded. Changes to the Penal Servitude Act limiting convict transportation, petty crime and a need to manage its proliferation resulted in large numbers of people being incarcerated at Fremantle.


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