scholarly journals Symmetries in the Mathematical and Physical Description of Nature

2020 ◽  
Vol 8 (`11) ◽  
pp. 36-48
Author(s):  
Andreas Gimsa
Keyword(s):  
Angular Momentum ◽  
Conservation Laws ◽  
Essential Role ◽  
Laws Of Nature ◽  
Conservation Of Energy ◽  
Physical Description ◽  
The World ◽  
System Characteristics

Symmetries play an essential role in nature. Symmetrical structures are generally perceived as beautiful. Mathematicians and also physicists even regard symmetries in the equations for the mathematical and physical description of the world as an indication of their correctness. The British mathematician Godfrey Harold Hardy [1.] writes: "The mathematician's patterns, like the painter's or the poet's must be beautiful; the ideas like the colours or the words, must fit together in a harmonious way. Beauty is the first test: there is no permanent place in the world for ugly mathematics.“ A very interesting example of symmetries in physics has been provided by Emmy Noether, who found that certain system characteristics are preserved during changes (transformations). Emmy Noether derived the propositions of conservation of energy, momentum and angular momentum from the invariance (immutability) of the laws of nature during transformation of time, place and direction. These symmetries and their conservation laws form the foundation of physics. In this publication, further essential symmetries are to be investigated, which relate in particular to the symmetry of energy and information and their effects.

scholarly journals Varieties of dispositional essentialism about natural laws

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Salim Hirèche
Keyword(s):  
Conservation Laws ◽  
Relative Position ◽  
Laws Of Nature ◽  
Important Task ◽  
Natural Laws ◽  
Natural Entities ◽  
The World ◽  
Dispositional Essentialism ◽  
Modal Force ◽  
Internal Comparison

AbstractAn important task for metaphysicians and philosophers of science is to account for laws of nature – in particular, how they distinguish themselves from ‘mere’ regularities, and the modal force they are endowed with, ‘natural necessity’. Dispositional essentialism about laws (for short: ‘essentialism’) is roughly the view that laws distinguish themselves by being grounded in the essences of natural entities (e.g. kinds, properties). This paper does not primarily concern how essentialism compares to its main rivals – Humeanism and Armstrongeanism. Rather, it distinguishes and comparatively assesses various brands of essentialism – which mainly differ as to where exactly they take laws to find their essentialist sources (e.g. in particular entities, like electrons, or in larger pluralities of entities, or in the world as a whole), and what they take to be the targets of laws, namely what they apply to. Yet, this internal comparison is not unrelated to the more general debate about laws: the main criteria with which I compare these essentialist views concern how they can deal with some of the main objections faced by essentialism in general (the modal status it typically attributes to laws, which some think is too strong; and its alleged incapacity to account for the most 'general' laws, like conservation laws), and how they can keep what is arguably the main intuitive advantage of essentialism over its rivals (the fact that, on this view, things “govern themselves”). Thus, the paper also concerns the relative position of essentialism in the larger debate about laws – ultimately bringing support to it.

An analogy between electromagnetic and internal waves

2019 ◽  
Vol 485 (4) ◽  
pp. 428-433
Author(s):  
V. G. Baydulov ◽  
P. A. Lesovskiy
Keyword(s):  
Angular Momentum ◽  
Conservation Laws ◽  
Internal Wave ◽  
Special Relativity ◽  
Internal Waves ◽  
Maxwell Equations ◽  
Wave Equations ◽  
Lagrange Function ◽  
Lorentz Transformations ◽  
Symmetry Transformations

For the symmetry group of internal-wave equations, the mechanical content of invariants and symmetry transformations is determined. The performed comparison makes it possible to construct expressions for analogs of momentum, angular momentum, energy, Lorentz transformations, and other characteristics of special relativity and electro-dynamics. The expressions for the Lagrange function are defined, and the conservation laws are derived. An analogy is drawn both in the case of the absence of sources and currents in the Maxwell equations and in their presence.

The concepts of Ayurveda and Pāli Literature in connection to Psychotherapy

2017 ◽  
Vol 2 (3) ◽  
Author(s):  
Kolarkar Rajesh Shivajirao ◽  
Kolarkar Rajashree Rajesh
Keyword(s):  
Mental Disorders ◽  
Laws Of Nature ◽  
Code Of Conduct ◽  
Economic Consequences ◽  
Ultimate Truth ◽  
Traditional System ◽  
The World ◽  
Mind And Body ◽  
The Mind ◽  
The Buddha

The perfect balance of Mind and body is considered as complete health in Pāli literature as well as in Ayurveda. Pāli literature and Ayurveda have their own identity as most ancient and traditional system of medicine in India.The universal teachings of the Buddha are the most precious legacy ancient India gave to the world. The teachings are a practical code of conduct, a way of purity and of gracious living. There is a scientific study of the truth pertaining to mind and matter, and the ultimate truth beyond. In fact, the Buddha should be more appropriately known as a super-scientist who studied the entire laws of nature governing the Universe, by direct personal experience. The Buddha's rational teachings are clearly explained in the Eight-fold Noble Path, divided in three divisions of Sīla (morality), Samādhi (mastery over the mind), Paññā i.e. ‘Pragya' (purification of the mind, by developing insight). In Ayurveda Psychotherapy can be done by Satvavajaya Chikitsa and good conduct. Aim is to augment the Satva Guna in order to correct the imbalance in state of Rajas (Passion) and Tamas (Inertia). Sattvavajaya as psychotherapy, is the mental restraint, or a "mind control" as referred by Caraka, as well as Vagbhata is achieved Dnyan (education), Vidnyan (training in developing skill), Dhairya (development of coping mechanism), Smruti (memory enhancement), Samadhi (concentration of mind). According to WHO, Mental disorders are the common problem. The burden of mental disorders continues to grow with significant impacts on health and major social, human rights and economic consequences in all countries of the world.

Conservation laws

2018 ◽  
Author(s):  
Nathalie Deruelle ◽  
Jean-Philippe Uzan
Keyword(s):  
Dynamical System ◽  
Angular Momentum ◽  
Conservation Laws ◽  
Total Energy ◽  
Superposition Principle ◽  
Momentum Conservation ◽  
Conserved Quantities ◽  
Angular Momentum Conservation ◽  
Third Law ◽  
The Law

This chapter defines the conserved quantities associated with an isolated dynamical system, that is, the quantities which remain constant during the motion of the system. The law of momentum conservation follows directly from Newton’s third law. The superposition principle for forces allows Newton’s law of motion for a body Pa acted on by other bodies Pa′ in an inertial Cartesian frame S. The law of angular momentum conservation holds if the forces acting on the elements of the system depend only on the separation of the elements. Finally, the conservation of total energy requires in addition that the forces be derivable from a potential.

Integrated Coastal Management: The Role of Law and Lawyers

1999 ◽  
Vol 14 (4) ◽  
pp. 491-522
Author(s):  
Brady Coleman ◽  
Robert Beckman
Keyword(s):  
Coastal Management ◽  
Essential Role ◽  
Management Programme ◽  
Integrated Coastal Management ◽  
Policy Makers ◽  
Coastal Resource ◽  
The World ◽  
Critical Understanding

AbstractIntegrated coastal management (ICM) programmes are being planned, formulated and implemented in coastal States all over the world. To date, however, ICM has been seen as more in the realm of policy-makers, managers, scientists, coastal resource economists, and others, rather than in the realm of lawyers. This article reveals how law and lawyers should play an absolutely essential role at all stages of the ICM process. Ideally, ICM legal consultants will have a broad range of knowledge and experience in both international legal treaties as well as in certain fundamental national law principles, so that coastal zone policies will be designed and carried out with a critical understanding of the laws and institutions needed for the long-term success of an integrated coastal management programme.

Non-axisymmetric Unstable Modes in a Thin Differentially Rotating Gaseous Disk

1991 ◽  
Vol 02 (01) ◽  
pp. 367-370
Author(s):  
M.H.M. HEEMSKERK ◽  
G.J. SAVONIJE
Keyword(s):  
Angular Momentum ◽  
Conservation Laws ◽  
Numerical Solutions ◽  
Gravitational Attraction ◽  
Rotating Disc ◽  
Central Mass ◽  
Reflecting Boundaries ◽  
Self Gravity ◽  
Axisymmetric Perturbations ◽  
Gaseous Disc

We consider the linear stability of a thin differentially rotating gaseous disc with reflecting boundaries against non-axisymmetric perturbations. We assume the unperturbed disc to be in centrifugal equilibrium with the gravitational attraction of a central mass M, and consider discs whose mass can be neglected relative to M. We discuss the relevant conservation laws for the energy and angular momentum of linear non-axisymmetric modes in a thin rotating disc without self-gravity and illustrate the basic mode amplification mechanisms with help of some of our numerical solutions [1].

scholarly journals The Relativistic and the Hidden Momentum of Minkowski and Abraham in Relativistic Energy Wave

2021 ◽  
Author(s):  
Daniel Cardoso
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Mechanical Energy ◽  
Recent Theory ◽  
Translational Energy ◽  
Angle Of Incidence ◽  
Relativistic Energy ◽  
Conservation Of Energy ◽  
Ignition Device

An analysis of the consistency of the Abraham and Minkowski momenta in the determination of the photon trajectory was carried out considering a new principle of conservation of the photon's mechanical energy, in which the photon conserves translational energy in orbital angular momentum when transiting between two media, introducing the relativistic energy wave (REW). The confrontation between REW and the recent theory of space-time waves (ST) was considered, pondering your differences. Throughout this study it was possible to verify that the Abraham momentum appears a relativistic photon ignition device in the transition between two media, acting as the hidden momentum of the Minkowski’s relativistic momentum. The wavy behavior in the matter is relativistic, and the relativistic trajectory appears with delays and advances, with points of synchronization between source-observer. The classical or relativistic trajectories are determined as a function of the angle of incidence and the relative refractive index, by one of two distinct non-additive torques, the classic by Abraham or the relativistic by Minkowski. It was found that the same analysis conducted under the principle of conservation of the mechanical energy of the photon can be treated by an new Doppler, Relativistic Apparent, that can be confused with other Dopplers in the treatment of redshift from distant sources. It was found that the conservation of energy in Orbital Angular Momentum (OAM), in the interaction with matter, explains that the synchronization instants are found in the inversion of the OAM, where the advances and delays of REW occur under negligible variations of the OAM, however, opposites.

scholarly journals Thrombosis And Thromboprophylaxis In COVID-19 Patients During Hospitalization And Early Post-discharge Period

2021 ◽  
Vol 12 (7) ◽  
pp. 130-137
Author(s):  
Hosseini Mehr Seyed Pouriya ◽  
Smorzhevskyi Valentyn ◽  
Dzekunova Yuliia ◽  
Dmytrenko Igor
Keyword(s):  
Essential Role ◽  
Post Discharge ◽  
Target Groups ◽  
Survival Prognosis ◽  
Medical Centers ◽  
The World ◽  
Anticoagulant Prophylaxis ◽  
Therapy Target

While SARS-CoV-2 infection continues to circulate around the world, there are still many uncertainties on how to treat the patients with this potentially deadly virus, and more importantly, for how long! COVID-19 causes many different symptoms, among which coagulopathy seems to play an essential role in the survival prognosis of patients. While medical centers worldwide have developed various algorithms for preventing thrombosis in COVID-19  patients, there are still no clear guidelines on the length of thromboprophylaxis therapy, target groups who should receive suitable anticoagulant prophylaxis, and even the choice of the most appropriate agent for such treatment.  

scholarly journals The concept of creating thrust based on angular momentum change

2021 ◽  
Author(s):  
Sergei Kupreev
Keyword(s):  
Angular Momentum ◽  
Vacuum Chamber ◽  
Loop Quantum Gravity ◽  
Low Energy ◽  
Practical Implementation ◽  
Material Body ◽  
The World ◽  
Classical And Quantum Mechanics ◽  
Physical Principles ◽  
Kinetic Moment

Abstract The change in the kinetic moment of a material body is considered regarding to classical and quantum mechanics. The possibility of creating the propulsion system in terms of energy efficiency exceeding the photon engine has been theoretically proved. The proposed new principle of motion is based on the law of conservation of angular momentum and is fully consistent with the basic fundamental laws of physics. It is proposed to use the emission/absorption of streams of low-energy particles with spin in the direction perpendicular to the movement of the material body. The practical implementation of this idea is confirmed by the presence of promising approaches to solving the problem of quantizing gravity (string theory, loop quantum gravity, etc.) recognized by the world scientific community and by the successful results of experiments conducted by the authors with the motion of bodies in a vacuum chamber. The proposed idea, the examples and experiments has given grounds for the formation of new physical concepts of the speed, mass and inertia of bodies. The obtained results can be used in experiments to search for elementary particles with low energy, to explain a number of physics phenomena and to develop transport of objects based on new physical principles.

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