scholarly journals Early dynamical world models: A historical review

2009 ◽  
Vol 5 (S260) ◽  
pp. 182-188
Author(s):  
Helge Kragh

AbstractModels of the universe, in the sense of solutions to the cosmological field equations, took their start in 1917 with Einstein's closed universe. During the next two decades they were developed to comprise evolving models, some of them cyclic and some of them with a definite age. The history of this development, as it occurred up to the mid 1930s, is reviewed. It is argued that in 1930-31, cosmology experienced a kind of paradigm shift.

2017 ◽  
Vol 32 (33) ◽  
pp. 1750182 ◽  
Author(s):  
Ali İhsan Keskin ◽  
Irfan Acikgoz

In this study, the validity of the generalized second law of thermodynamics (GSLT) has been investigated in F(R, G) gravity. We consider that the boundary of the universe is surrounded by an apparent horizon in the spatially flat Friedmann–Robertson–Walker (FRW) universe, and we take into account the Hawking temperature on the horizons. The unified solutions of the field equations corresponding to gravity theory have been applied to the validity of the GSLT frame, and in this way, both the solutions have been verified and all the expansion history of the universe has been shown in a unified picture.


1991 ◽  
Vol 27 (1) ◽  
pp. 39-48 ◽  
Author(s):  
Robin Le Poidevin

Could a theory concerning the temporal structure of the universe have any implications for the possibility of a creator? A recent remark by Stephen Hawking suggests that it could. In A Brief History of Time, Hawking writes:The idea that space and time may form a closed surface without boundary … has profound implications for the role of God in the affairs of the universe… So long as the universe had a beginning, we could suppose it had a creator. But if the universe is really completely self-contained, having no boundary or edge, it would have neither beginning nor end: it would simply be. What place, then, for a creator?


2021 ◽  
Vol 77 (4) ◽  
Author(s):  
Bambang Qomaruzzaman

Al-Sira Al-Nabawiyya is often used as a reference to violence in Islam, mainly because war narration is so dominantly displayed. The tendency of using Al-Sira Al-Nabawiyya as the basis of violence conception in Islam drives Islamic teaching practices to become violence-oriented. This article presents a re-reading of Al-Sira Al-Nabawiyya by Wakhiduddin Khan, Tariq Ramadan and Satha-Anand, with a mimetic anthropology framework. The reading on Al-Sira resulted in three conclusions. Firstly, there are many non-violence stories at all stages in the life of Prophet Muhammad, since the pre-prophetic era until his death. Secondly, the Prophet Muhammad was a teacher who based his activities on the principles of tawhîd, patience, love, forgiveness and appreciation for humanity. Thirdly, educational activities are Muhammad’s exemplary activities which are full of non-violent values. The findings of this article can be used as the basis for the reformulation of Al-Sira Al-Nabawiyya teaching materials in Islamic Education as well as the basis of teaching activities for Islamic teachers.Contribution: This article contributes to a paradigm shift in teaching the History of the Prophet Muhammad in a peaceful Islamic education system. The peaceful paradigm in this article can also divert the tendency of Islamic extremism to become an Islam that provides peace and prosperity to the universe (rahmatan lil ‘alamin).


2021 ◽  
Author(s):  
Milene Gil

A review of the lime painting technique is made based on five Treatises and Construction Technical Manuals that were published in Portugal between 1880 and 1930 and were or became a reference in technical and professional education. The goal is to document the history of one of the most popular types of painting in Portuguese Building Heritage until about 1960, whose testimonies still remaining in historic centers should be studied for the purposes of registration and rehabilitation works. This survey enabled to ascertain details of the executants, of the materials and the know-how which are still little known today and to highlight the paradigm shift from what was once considered a type of coarse painting that only gave rudimentary and monotonous tones.


2018 ◽  
Vol 11 (1-2) ◽  
pp. 279-295
Author(s):  
Mohammed Aref

This review essay introduces the work of the Egyptian scientific historian and philosopher Roshdi Rashed, a pioneer in the field of the history of Arab sciences. The article is based on the five volumes he originally wrote in French and later translated into Arabic, which were published by the Centre for Arab Unity Studies and which are now widely acclaimed as a unique effort to unveil the achievements of Arab scientists. The essay reviews this major work, which seems, like Plato’s Republic to have “No Entry for Those Who Have No Knowledge of Mathematics” written on its gate. If you force your way in, even with elementary knowledge of computation, a philosophy will unfold before your eyes, described by the Italian astronomer Galileo Galilei as “written in that great book which ever lies before our eyes—I mean the universe—but we cannot understand it if we do not first learn the language and grasp the symbols, in which it is written. This book is written in the mathematical language, and the symbols are triangles, circles and other geometrical figures, without whose help it is impossible to comprehend a single word of it; without which one wanders in vain through a dark labyrinth.” The essay is a journey through this labyrinth where the history of world mathematics got lost and was chronicled by Rashed in five volumes translated from the French into Arabic. It took him fifteen years to complete.


Author(s):  
Arezou Azad

Covering the period from 709 to 871, this chapter traces the initial conversion of Afghanistan from Zoroastrianism and Buddhism to Islam. Highlighting the differential developments in four regions of Afghanistan, it discusses the very earliest history of Afghan Islam both as a religion and as a political system in the form of a caliphate.  The chapter draws on under-utilized sources, such as fourth to eighth century Bactrian documents from Tukharistan and medieval Arabic and Persian histories of Balkh, Herat and Sistan. In so doing, it offers a paradigm shift in the way early Islam is understood by arguing that it did not arrive in Afghanistan as a finished product, but instead grew out of Afghanistan’s multi-religious context. Through fusions with Buddhism, Zoroastrianism, early Abrahamic traditions, and local cult practices, the Islam that resulted was less an Arab Islam that was imported wholesale than a patchwork of various cultural practices.


2010 ◽  
Vol 1 (1) ◽  
pp. 75-93
Author(s):  
Jessica Moberg

Immediately after the Second World War Sweden was struck by a wave of sightings of strange flying objects. In some cases these mass sightings resulted in panic, particularly after authorities failed to identify them. Decades later, these phenomena were interpreted by two members of the Swedish UFO movement, Erland Sandqvist and Gösta Rehn, as alien spaceships, or UFOs. Rehn argued that ‘[t]here is nothing so dramatic in the Swedish history of UFOs as this invasion of alien fly-things’ (Rehn 1969: 50). In this article the interpretation of such sightings proposed by these authors, namely that we are visited by extraterrestrials from outer space, is approached from the perspective of myth theory. According to this mythical theme, not only are we are not alone in the universe, but also the history of humankind has been shaped by encounters with more highly-evolved alien beings. In their modern day form, these kinds of ideas about aliens and UFOs originated in the United States. The reasoning of Sandqvist and Rehn exemplifies the localization process that took place as members of the Swedish UFO movement began to produce their own narratives about aliens and UFOs. The question I will address is: in what ways do these stories change in new contexts? Texts produced by the Swedish UFO movement are analyzed as a case study of this process.


2020 ◽  
Vol 18 ◽  
Author(s):  
Humberto Guanche Garcell ◽  
Juan José Pisonero Socias ◽  
Gilberto Pardo Gómez

Background: During the last 30 years an antimicrobial stewardship program (ASP) was implemented in a facility with periods of weakness. We aim to describe the history of the sustainability failure in the local ASP. Methods: A historical review was conducted using original data from the facility library and papers published. An analysis of factors related to the failure was conducted based on the Doyle approach. Results: The first ASP was implemented from 1989 to 1996 based on the international experiences and contributes to the improvement in the quality of prescription, reduction of 52% in cost and in the incidence of nosocomial infection. The second program restarts in 2008 and decline in 2015, while the third program was guided by the Pan-American Health Organization from 2019. This program, in progress, is more comprehensive than previous ones and introduced as a novel measure the monitoring of antibiotic prophylaxis in surgery. The factors related to the sustainability were considered including the availability of antimicrobials, the leader´s support, safety culture, and infrastructure. Conclusions: The history behind thirty years of experiences in antimicrobial stewardship programs has allowed us to identify the gaps that require proactive strategies and actions to achieve sustainability and continuous quality improvement.


Author(s):  
David D. Nolte

Galileo Unbound: A Path Across Life, The Universe and Everything traces the journey that brought us from Galileo’s law of free fall to today’s geneticists measuring evolutionary drift, entangled quantum particles moving among many worlds, and our lives as trajectories traversing a health space with thousands of dimensions. Remarkably, common themes persist that predict the evolution of species as readily as the orbits of planets or the collapse of stars into black holes. This book tells the history of spaces of expanding dimension and increasing abstraction and how they continue today to give new insight into the physics of complex systems. Galileo published the first modern law of motion, the Law of Fall, that was ideal and simple, laying the foundation upon which Newton built the first theory of dynamics. Early in the twentieth century, geometry became the cause of motion rather than the result when Einstein envisioned the fabric of space-time warped by mass and energy, forcing light rays to bend past the Sun. Possibly more radical was Feynman’s dilemma of quantum particles taking all paths at once—setting the stage for the modern fields of quantum field theory and quantum computing. Yet as concepts of motion have evolved, one thing has remained constant, the need to track ever more complex changes and to capture their essence, to find patterns in the chaos as we try to predict and control our world.


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