Introduction to theoretical physics. Vol. II. by A. Haas, Ph.D. Translated from the third and fourth editions by T. Verschoyle, M.C., B.Sc., A.R.C.S. Pp. x+414. London: Constable and Co., Ltd., 1925. price 21s

1926 ◽  
Vol 45 (19) ◽  
pp. 317-317
Author(s):  
H. M. Dawson
Keyword(s):  
Theoretical Physics ◽  
The Third

scholarly journals Muhammad Abdus Salam, K. B. E.. 29 January 1926–21 November 1996

1998 ◽  
Vol 44 ◽  
pp. 387-401 ◽  
Author(s):  
T. W. B. Kibble
Keyword(s):  
Third World ◽  
Imperial College ◽  
Theoretical Physics ◽  
The Third ◽  
Abdus Salam ◽  
Founding Director ◽  
The Rich ◽  
The Third World ◽  
Academy Of Sciences ◽  
Rich Countries

Abdus Salam was one of the leading theoretical physicists of his generation, the first Muslim to win a Nobel Prize for science. He was Professor of Theoretical Physics at Imperial College, founding Director of the International Centre for Theoretical Physics in Trieste, and founder and first President of the Third World Academy of Sciences. He was also a warm and generous man, who cared passionately about the inequities between the rich countries and the poor, and argued tirelessly for the importance of science to developing countries.

The Hidden Variables Theory

2018 ◽  
Author(s):  
Israel Fried
Keyword(s):  
W Boson ◽  
Energy Levels ◽  
Hidden Variables ◽  
Bound State ◽  
Electron Neutrino ◽  
Theoretical Physics ◽  
The Third ◽  
Quantum Numbers ◽  
Subatomic Particles ◽  
Charged Mesons

The initial values are a non-relativistic quantities of subatomic particles that are not detected in measurements due to their relative motions. In fact a laboratory measurements yield the relativistic reflection of that quantities. The theoretical physics research is based upon the symmetry manifestation of the quantum fields expressed by a combined theories associated with the gauge group SU(3) × SU(2) × U(1) that forms the Standard model. This theory uses a different approach to yield a theoretical values of the fundamental constants that accurately match the experimental results, and also presents the following discoveries: The electric charge of any subatomic particle is originated from its Orbital Angular Momentum (OAM). If the total OAM is offset, the particle is neutral. The electron's mass is a magnitude that expresses quantitatively the square of its magnetic flux quantum. The proton the neutron and all the baryons consist of three energy levels on which the quarks are orbiting. The third energy level is equivalent to 80.7 GEV, and it plays a major role at decaying process thru the weak force while it momentarily host charged mesons (The pentaquark is formed this way) that ultimately are emitted out thru the W boson that acquires the level's energy. The OAM of the orbiting quarks are a third or two thirds of the reduced Planck constant. The proton's missing spin is resolved by the contributions of the quark's OAM to the quark's spins. The Electron is a bound state composition of a negative Pi meson and an electron neutrino. The second and the third quarks generations are a variations of the "up" and "down" quarks (and their anti quarks) compositions. This revision includes a section in chapter 12 on the Quantum numbers obtained from the Schrodinger equation that can be obtained through a different approach, not by solving the wave function! This method provides a broader understanding of them.

scholarly journals Modeling and Stability Analysis for the Vibrating Motion of Three Degrees-of-Freedom Dynamical System Near Resonance

2021 ◽  
Vol 11 (24) ◽  
pp. 11943
Author(s):  
Wael S. Amer ◽  
Tarek S. Amer ◽  
Seham S. Hassan
Keyword(s):  
Dynamical System ◽  
Degrees Of Freedom ◽  
Multiple Scales ◽  
Positive Influence ◽  
Theoretical Physics ◽  
Physical Parameters ◽  
The Third ◽  
Near Resonance ◽  
The Stability ◽  
Three Degrees Of Freedom

The focus of this article is on the investigation of a dynamical system consisting of a linear damped transverse tuned-absorber connected with a non-linear damped-spring-pendulum, in which its hanged point moves in an elliptic path. The regulating system of motion is derived using Lagrange’s equations, which is then solved analytically up to the third approximation employing the approach of multiple scales (AMS). The emerging cases of resonance are categorized according to the solvability requirements wherein the modulation equations (ME) have been found. The stability areas and the instability ones are examined utilizing the Routh–Hurwitz criteria (RHC) and analyzed in line with the solutions at the steady state. The obtained results, resonance responses, and stability regions are addressed and graphically depicted to explore the positive influence of the various inputs of the physical parameters on the rheological behavior of the inspected system. The significance of the present work stems from its numerous applications in theoretical physics and engineering.

scholarly journals Superstrings Encounters of the Second, Third or Fourth Types?

2021 ◽  
Author(s):  
Stephane Maes
Keyword(s):  
Quantum Gravity ◽  
Lessons Learned ◽  
Theoretical Physics ◽  
The Third ◽  
Fourth Type ◽  
Theory Of Everything ◽  
M Theory ◽  
Universe Models

Strings and their evolutions as superstrings and M-theory have been one of the main focus of theoretical Physics for the last 40 years. In fact some have characterized superstrings and M-theory as the best candidates at explaining quantum gravity and providing a Theory of Everything. Others have claimed that it is “Physics of the next century provided for our exploration this century”. Yet not much has come out of it in terms of actual predictions or observation of anything about anything.In the context of explaining gravity with entanglement with multi-fold mechanisms, we encountered traces of superstrings and may have met some of them or their impacts. It qualifies for an alien encounter of the third type. Dualities between spacetime and superstrings were derived, yet nobody embarked or will ever embark on a superstring spacetime trip, at least. So no encounter of the fourth type. This paper summarizes what we have determined about strings, superstrings and M-theory as part of the multi-fold universe models. The observations and lessons learned are telling signs for superstring investigators.

Progress report on 21-cm observations at low latitude between longitudes (l 11) 0° and 66°

1967 ◽  
Vol 31 ◽  
pp. 177-179
Author(s):  
W. W. Shane
Keyword(s):  
Preliminary Report ◽  
Progress Report ◽  
Galactic Centre ◽  
Low Latitude ◽  
The Third ◽  
Introductory Lecture ◽  
Centre Region

In the course of several 21-cm observing programmes being carried out by the Leiden Observatory with the 25-meter telescope at Dwingeloo, a fairly complete, though inhomogeneous, survey of the regionl11= 0° to 66° at low galactic latitudes is becoming available. The essential data on this survey are presented in Table 1. Oort (1967) has given a preliminary report on the first and third investigations. The third is discussed briefly by Kerr in his introductory lecture on the galactic centre region (Paper 42). Burton (1966) has published provisional results of the fifth investigation, and I have discussed the sixth in Paper 19. All of the observations listed in the table have been completed, but we plan to extend investigation 3 to a much finer grid of positions.

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

Monte Carlo Algorithms for Moments of Transition Arrays

1988 ◽  
Vol 102 ◽  
pp. 79-81
Author(s):  
A. Goldberg ◽  
S.D. Bloom
Keyword(s):  
Monte Carlo ◽  
State Vector ◽  
Basis Vector ◽  
Collective State ◽  
Dispersion Characteristics ◽  
Dipole Strength ◽  
The Third ◽  
Monte Carlo Algorithms ◽  
Third Moment ◽  
Very High

AbstractClosed expressions for the first, second, and (in some cases) the third moment of atomic transition arrays now exist. Recently a method has been developed for getting to very high moments (up to the 12th and beyond) in cases where a “collective” state-vector (i.e. a state-vector containing the entire electric dipole strength) can be created from each eigenstate in the parent configuration. Both of these approaches give exact results. Herein we describe astatistical(or Monte Carlo) approach which requires onlyonerepresentative state-vector |RV> for the entire parent manifold to get estimates of transition moments of high order. The representation is achieved through the random amplitudes associated with each basis vector making up |RV>. This also gives rise to the dispersion characterizing the method, which has been applied to a system (in the M shell) with≈250,000 lines where we have calculated up to the 5th moment. It turns out that the dispersion in the moments decreases with the size of the manifold, making its application to very big systems statistically advantageous. A discussion of the method and these dispersion characteristics will be presented.

Probe size and 5th-order aberration

1987 ◽  
Vol 45 ◽  
pp. 134-135 ◽  
Author(s):  
Zhifeng Shao
Keyword(s):  
Electron Probe ◽  
Spherical Aberration ◽  
Wave Length ◽  
Cylindrical Symmetry ◽  
Electron Wave ◽  
Third Order ◽  
The Third ◽  
Probe Radius ◽  
Small Probe ◽  
Probe Size

A small electron probe has many applications in many fields and in the case of the STEM, the probe size essentially determines the ultimate resolution. However, there are many difficulties in obtaining a very small probe.Spherical aberration is one of them and all existing probe forming systems have non-zero spherical aberration. The ultimate probe radius is given byδ = 0.43Csl/4ƛ3/4where ƛ is the electron wave length and it is apparent that δ decreases only slowly with decreasing Cs. Scherzer pointed out that the third order aberration coefficient always has the same sign regardless of the field distribution, provided only that the fields have cylindrical symmetry, are independent of time and no space charge is present. To overcome this problem, he proposed a corrector consisting of octupoles and quadrupoles.

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