Introduction to Newtonian Physics

Keyword(s):  
2006 ◽  
Vol 58 ◽  
pp. 157-172 ◽  
Author(s):  
Edna Ullmann-Margalit

I want to focus on some of the limits of decision theory that are of interest to the philosophical concern with practical reasoning and rational choice. These limits should also be of interest to the social-scientists' concern with Rational Choice.Let me start with an analogy. Classical Newtonian physics holds good and valid for middle-sized objects, but not for the phenomena of the very little, micro, sub-atomic level or the very large, macro, outer-space level: different theories, concepts and laws apply there. Similarly, I suggest that we might think of the theory of decisionmaking as relating to middle-sized, ordinary decisions, and to them only. There remain the two extremes, the very ‘small’ decisions on the one hand and the very ‘big’ decisions on the other. These may pose a challenge to the ordinary decision theory and may consequently require a separate treatment.


2021 ◽  
Vol 20 (5) ◽  
pp. 1-34
Author(s):  
Edward A. Lee

This article is about deterministic models, what they are, why they are useful, and what their limitations are. First, the article emphasizes that determinism is a property of models, not of physical systems. Whether a model is deterministic or not depends on how one defines the inputs and behavior of the model. To define behavior, one has to define an observer. The article compares and contrasts two classes of ways to define an observer, one based on the notion of “state” and another that more flexibly defines the observables. The notion of “state” is shown to be problematic and lead to nondeterminism that is avoided when the observables are defined differently. The article examines determinism in models of the physical world. In what may surprise many readers, it shows that Newtonian physics admits nondeterminism and that quantum physics may be interpreted as a deterministic model. Moreover, it shows that both relativity and quantum physics undermine the notion of “state” and therefore require more flexible ways of defining observables. Finally, the article reviews results showing that sufficiently rich sets of deterministic models are incomplete. Specifically, nondeterminism is inescapable in any system of models rich enough to encompass Newton’s laws.


2006 ◽  
Vol 51 (2) ◽  
Author(s):  
Osvaldo Fontes Filho

Este estudo sintetiza as leituras de Merleu-Ponty sobre a ciência moderna, e procura esclarecer como elas desautorizam uma concepção determinista da Natureza. Ao contrário da física newtoniana e de outras ontologias substancialistas, que submetem a contingência ao entendimento, Merleau-Ponty desvela um registro do descontínuo, onde os seres reduzem-se a “feixe de probabilidades”. Assim, ao fornecer sentido ontológico ao polimorfismo do tempo e do espaço percebidos, Merleau-Ponty intercepta em teóricos pós-newtonianos renovada concepção da matéria: “éter dos acontecimentos”, ela se esclarece menos pelas longas cadeias causais que pela “pululação ilimitada das categorias”. A conseqüente refutação dos princípios de identidade é oportunidade para investir individualidades em devir e modos de existência ubiqüitários, atestados pelas modernas embriologias, elementos que ajudam a reformular o cenário ontológico. PALAVRAS-CHAVE – Natureza. Ciência. Acontecimento. Individualidade. Ontologia. ABSTRACT This paper summarizes Merleau- Ponty lectures about modern sciences and tries to enlighten how he disavows a determinist conception of Nature. Adversely to Newtonian physics and others substantialistic ontologies that translate contingency into understanding, Merleau- Ponty reveals a register of discontinuity in Nature where beings amount to be a “bundle.of probabilities”. Therefore, in getting ontological sense to the polymorphism of perceived time and space, Merleau-Ponty identifies in post- Newtonian theorists a renewed conception of matter as “ether of events”. Matter do not have to be shaped by long causal chains but by “unlimited profusion of categories”. A consequent refusal of identity principles is an opportunity to a close examination of individualities in progress and ubiquitous ways of existence, both attested by moderns embryologies. In doing so, Merleau-Ponty aims to reformulate ontological scene. KEY WORDS – Nature, science, event, individuality, ontology.


2021 ◽  
Author(s):  
Yaxin Liu ◽  
Stella F. Lourenco

Apparent motion is a robust perceptual phenomenon in which observers perceive a stimulus traversing the vacant visual space between two flashed stimuli. Although it is known that the “filling-in” of apparent motion favors the simplest and most economical path, the interpolative computations remain poorly understood. Here, we tested whether the perception of apparent motion is best characterized by Newtonian physics or kinematic geometry. Participants completed a target detection task while Pacmen- shaped objects were presented in succession to create the perception of apparent motion. We found that target detection was impaired when apparent motion, as predicted by kinematic geometry, not Newtonian physics, obstructed the target’s location. Our findings shed light on the computations employed by the visual system, suggesting specifically that the “filling-in” perception of apparent motion may be dominated by kinematic geometry, not Newtonian physics.


2021 ◽  
pp. 147387162110603
Author(s):  
Gerd Kortemeyer

The paper describes a method for the immersive, dynamic visualization of undirected, weighted graphs. Using the Fruchterman-Reingold method, force-directed graphs are drawn in a Virtual-Reality system. The user can walk through the data, as well as move vertices using controllers, while the network display rearranges in realtime according to Newtonian physics. In addition to the physics behind the employed method, the paper explains the most pertinent computational mechanisms for its implementation, using Unity, SteamVR, and a Virtual-Reality system such as HTC Vive (the source package is made available for download). It was found that the method allows for intuitive exploration of graphs with on the order of [Formula: see text] vertices, and that dynamic extrusion of vertices and realtime readjustment of the network structure allows for developing an intuitive understanding of the relationship of a vertex to the remainder of the network. Based on this observation, possible future developments are suggested.


Author(s):  
Ricardo Javier Rademacher Mena

The last 10 years have seen explosive growth in the fields of online gaming. The largest of these games are undoubtedly the Massively Multiplayer Online Games (MMOG), such as World of Warcraft or City of Heroes, which attract millions of users throughout the world every day. The last 20 years have also seen the growth of a new field of physics known as Physics Education Research (PER). This field consists of physicists dedicated to improving how we learn and teach the subject of physics. In this chapter, the author discusses his personal quest to combine PER with a MMOG and create an online virtual world dedicated to teaching Newtonian physics.


Gamification ◽  
2015 ◽  
pp. 930-955
Author(s):  
Ricardo Javier Rademacher Mena

The last 10 years have seen explosive growth in the fields of online gaming. The largest of these games are undoubtedly the Massively Multiplayer Online Games (MMOG), such as World of Warcraft or City of Heroes, which attract millions of users throughout the world every day. The last 20 years have also seen the growth of a new field of physics known as Physics Education Research (PER). This field consists of physicists dedicated to improving how we learn and teach the subject of physics. In this chapter, the author discusses his personal quest to combine PER with a MMOG and create an online virtual world dedicated to teaching Newtonian physics.


Author(s):  
Kambiz E. Maani

Despite our most impressive advances in science and technology, our prevailing worldview and the way we work and relate are deeply rooted in the thinking that emerged during the Renaissance of the 17th century. This thinking was influenced by the sciences of that era and, in particular, by Newtonian physics. Newton viewed the world as a machine that was created to serve its master—God (Ackoff, 1993). The machine metaphor and the associated mechanistic (positivist) worldview, which was later extended to the economy, the society, and the organization, has persisted until today and is evident in our thinking and vocabulary. The mechanistic view of the enterprise became less tenable in the 20th century, partly due to the emergence of the corporation and the increasing prominence of human relation issues in the workplace. As the futurist Alvin Toffler (1991) declared, “the Age of the Machine is screeching to a halt” (Toffler, 1991).


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