oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Historical problems and learning difficulties in the Newtonian interpretation of supposedly elementary electrostatic phynomena  [PDF]
C. Furió,J. Guisasola,J.L. Zubimendi
Investiga??es em Ensino de Ciências , 1998,
Abstract: This paper starts with a a brief historical review of electrostatics. Then, the use of this historical knowledge is proposed in order to analyse students’ difficulties in learning this theory. This is done using proofs and empirical designs, employed mainly in the historical evolution, which are known as “natural” phenomena or facts, and examining what explanations are given by the students to these facts. Research findings seem to suggest that most of students’ interpretations of electrostatics phenomena present ideas about the electrical nature of matter that differ from the Newtonian theory and remind us of pre-Newtonian explicative models.
The Hydrogen Atom Fractal Spectra, the Missing Dark Energy of the Cosmos and Their Hardy Quantum Entanglement  [PDF]
Mohamed S. El Naschie
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2013, DOI: 10.4236/ijmnta.2013.23023
Abstract:

In this letter, I outline the intimate connection between the fractal spectra of the exact solution of the hydrogen atom and the issue of the missing dark energy of the cosmos. A proposal for a dark energy reactor harnessing the dark energy of the Schrodinger wave via a quantum wave nondemolition measurement is also presented.

The Missing Dark Energy of the Cosmos from Light Cone Topological Velocity and Scaling of the Planck Scale  [PDF]
Mohamed S. El Naschie
Open Journal of Microphysics (OJM) , 2013, DOI: 10.4236/ojm.2013.33012
Abstract: The paper presents an exact analysis leading to an accurate theoretical prediction of the amount of the mysteriously missing hypothetical dark energy density in the cosmos. The value found, namely 95.4915028% is in full agreement with earlier analysis, the WMAP and the supernova cosmic measurements. The work follows first the strategy of finding a critical point which separates a semi-classical regime from a fully relativistic domain given by topological unit interval velocity parameter then proceeds to wider aspects of a topological quantum field of fractal unit interval. This idea of a critical velocity parameter was first advanced by Sigalotti and Mejias in 2006 who proposed a critical value equal\"\" . A second interesting proposal made in 2012 by Hendi and Sharifzadeh set the critical point at 0.8256645. The present analysis is based upon a light cone velocity quantized coordinate. This leads to the same quantum relativity energy mass relation found in earlier publications by rescaling that of Einstein’s special relativity. Two effective quantum gravity formulae are obtained. The first is for the ordinary measurable energy of the quantum particle\"\" while the second is for dark energy density of the quantum wave which we cannot measure directly and we can only infer its existence from the measured accelerated expansion of the universe E(D) = \"\"where\"\" . The critical velocity parameter in this case arises naturally to be \"\". The results so obtained are validated using a heuristic Lorentzian transformation. Finally the entire methodology is put into the wider perspective of a fundamental scaling theory for the Planck scale proposed by G. Gross.
Negative Norms in Quantized Strings as Dark Energy Density of the Cosmos  [PDF]
Mohamed S. El Naschie
World Journal of Condensed Matter Physics (WJCMP) , 2016, DOI: 10.4236/wjcmp.2016.62009
Abstract: The present short paper is concerned with accurate explanation as well as quantification of the so called missing dark energy of the cosmos. It was always one of the main objectives of any successful general theory of high energy particle physics and quantum cosmology to keep non-physical negative norms, the so called ghosts completely out of that theory. The present work takes the completely contrary view by admitting these supposedly spurious states as part of the physical Hilbert space. It is further shown that rethinking the ghost free condition with the two critical spacetime dimensions D1 = 26 and D2 = 25 together with the corresponding intercept a1 = 1 and a2 ≤ 1 respectively and in addition imposing, as in Gross et al. heterotic superstrings, an overall 496 dimensional exceptional Lie symmetry group, then one will discover that there are two distinct types of energy. The first is positive norm ordinary energy connected to the zero set quantum particles which is very close to the measured ordinary energy density of the cosmos, namely E(O) = mc2/22. The second is negative norm (i.e. ghost) energy connected to the empty set quantum wave and is equal to the conjectured dark energy density of the cosmos E(D) = mc2 (21/22) presumed to be behind the observed accelerated cosmic expansion. That way we were able to not only explain the physics of dark energy without adding any new concepts or novel additional ingredients but also we were able to compute the dark energy density accurately and in full agreement with measurements and observations.
Das vermeintlich S kulare The Supposedly Secular  [cached]
Martin Lücke
querelles-net , 2008,
Abstract: Was haben Bruce Springsteen, Parzival und m nnliche heterosexuelle Freier gemeinsam? In ihrem Band Erl ser. Figurationen m nnlicher Hegemonie zeigen Sven Glawion, Elahe Haschemi Yekani und Jana Husmann-Kastein, dass das religi s aufgeladene Motiv einer (christlichen) m nnlichen Erl serfigur als eine aufschlussreiche heuristische Folie dienen kann, um Mechanismen m nnlicher Hegemonie gerade auch in (vermeintlich) s kularen Gesellschaften sichtbar zu machen. What do Bruce Springsteen, Parzival, and heterosexual male Johns have in common? In their volume Redeemers, Figurations of Male Hegemony (Erl ser, Figurationen m nnlicher Hegemonie), Sven Glawion, Elahe Haschemi Yekani, and Jana Husmann-Kastein show that the religiously charged motif of a (Christian) male savior-figure can function as an enlightening heuristic model that makes visible the mechanisms of masculine hegemony, particularly in (supposedly) secular societies.
The Mass of the Cosmos  [PDF]
Charles Hellaby
Physics , 2006, DOI: 10.1111/j.1365-2966.2006.10475.x
Abstract: We point out that the mass of the cosmos on gigaparsec scales can be measured, owing to the unique geometric role of the maximum in the areal radius. Unlike all other points on the past null cone, this maximum has an associated mass, which can be calculated with very few assumptions about the cosmological model, providing a measurable characteristic of our cosmos. In combination with luminosities and source counts, it gives the bulk mass to light ratio. The maximum is particularly sensitive to the values of the bulk cosmological parameters. In addition, it provides a key reference point in attempts to connect cosmic geometry with observations. We recommend the determination of the distance and redshift of this maximum be explicitly included in the scientific goals of the next generation of reshift surveys. The maximum in the redshift space density provides a secondary large scale characteristic of the cosmos.
Convolutional Color Constancy  [PDF]
Jonathan T. Barron
Computer Science , 2015,
Abstract: Color constancy is the problem of inferring the color of the light that illuminated a scene, usually so that the illumination color can be removed. Because this problem is underconstrained, it is often solved by modeling the statistical regularities of the colors of natural objects and illumination. In contrast, in this paper we reformulate the problem of color constancy as a 2D spatial localization task in a log-chrominance space, thereby allowing us to apply techniques from object detection and structured prediction to the color constancy problem. By directly learning how to discriminate between correctly white-balanced images and poorly white-balanced images, our model is able to improve performance on standard benchmarks by nearly 40%.
On the constancy of light speed  [PDF]
Abdul Rouf
Physics , 2009,
Abstract: Method given for intuitively visualizing constancy of light speed. Using mass-energy equivalence, we can show with the help of simple thought experiments, that velocity time dilation and gravitational time dilation are a necessary consequence of principle of relativity. Speed of light is discussed in the context of each kind of time dilation.
Reduction of the COSMOS Southern Sky galaxy survey data to the RC3 standard system  [PDF]
J. Rousseau,H. Di Nella,G. Paturel,C. Petit
Physics , 1996, DOI: 10.1093/mnras/282.1.144
Abstract: After having cross-identified a subsample of LEDA galaxies in the COSMOS database, we defined the best relations to convert COSMOS parameters (coordinates, position angle, diameter, axis ratio and apparent magnitude) into RC3 system used in the LEDA database. Tiny secondary effects can be tested: distance to plate cenetrs effect and air-mass effect. The converted COSMOS parameters are used to add missing parameters on LEDA galaxies. Key words: galaxies - catalogue - photometry
An Infinite Fractal Cosmos  [PDF]
Robert L. Oldershaw
Physics , 2010,
Abstract: The paradigmatic transition from a small finite universe to an infinite unbounded fractal cosmos is briefly put into historical context and discussed.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.