Mathematical Modeling: Magneto-Thermoelastic Waves Propagation and Some Applications | Book Publisher International

 

In this book, an investigation has been made for mathematical modelling: magneto-thermoelastic waves' propagation and some applications in diverse fields as acoustics, aerospace, astronomy, geophysics, earthquakes, volcanoes, engineering and others. The fundamental and basic concepts and equations presented for the electro-thermoelasticity with external effects as gravity, rotation, initial stress and hydrostatic initial stress, as well as two-temperature, voids, diffusion, semiconducting, thermal relaxation times and thermal shock. The dissertation work reported here is originally motivated by several connections between elasticity, thermal field, electromagnetic field, rotation, initial stress, voids, photothermal, semiconducting, and diffusion. The effect of rotation, electromagnetic field, voids, diffusion, semiconducting, and thermal relaxation time will be studied on the waves' propagation (i.e., either waves' propagation "reflection and/or refraction" or "surface waves: Stoneley, Love, and Rayleigh"). Due to the coupling of the equation of motion, heat equation, and void equation in the context of generalised magneto-thermoelasticity, the work done in this field is unfortunately limited in number. The secular equation, Stoneley waves' velocity and attenuation coefficients are affected by the external parameters, such as the magnetic field, rotation, voids, and relaxation time. The finite difference technique under the effectiveness of rotation and decayed heat flux on the obtained components was graphically drawn. Numerical results of the problems solved are displayed by sample graphs.

Author(s) Details

Professor Elsayed Mohamed Abo-Dahab Khedary
Mathematics Department, Faculty of Science, South Valley University, Qena, 83523, Egypt.

 

Please see the book here:- https://doi.org/10.9734/bpi/mono/978-81-989994-3-6

 

Study about Piano Education in Contemporary China | Chapter 7 | An Overview of Literature, Language and Education Research Vol. 3

 

At the beginning of the 19th century, the elegant piano was introduced into China and became a well-known Western instrument. Parents in the education of their children, also pay more attention to piano education, which sets off a wave of learning piano upsurge. This paper analyzed the reasons why piano education can present such a strong popularity through personal practice and preliminary exploration of the current piano education. Piano learning is of great benefit to the growth of children and the development of people. The paper also made a series of reflections on some problems existing in the current piano education, including the talent and enjoyment of piano children, blind parents, training institutions and teachers, Immature grading and competition system. Then we reflected on the current situation of contemporary Chinese piano education. The future Chinese piano education should pay attention to the above problems and create a better music learning environment.

 

Author(s) Details

Lingran Liu
School of Art, Southeast University, Nanjing-211189, Jiangsu Province, China.

 

Please see the book here:- https://doi.org/10.9734/bpi/aoller/v3/1796

 

Evaluating the Shielding Effectiveness (SE) in the Electric Field and Magnetic Field and Plane Wave for Infinite Sheet Metals | Chapter 1 | Fundamental Research and Application of Physical Science Vol. 5

 Shielding photoelectric circuits from electromagnetic interference (EMI) is important in the aerospace industry, particularly for room vehicles, as EMI can have meaningful impacts on the functioning of various devices. Shielding influence (SE) is the industry-standard measure of EMI protecting. This study aims to evaluate the SE of three types of limitless sheet metals against magnetic, energetic fields, and plane waves generated for one electromagnetic pulse from a system. Maxwell's equatings were used to calculate the SE to decide whether the picked tapes conform to the 40 dB SE requirement particularized in electromagnetic compatibility (EMC) qualifications. Using MATLAB, absorption loss, thought loss, re-impression correction determinant, and SE were computed. The findings highlight the significance of proper EMI protecting in aerospace design and demonstrate how various sheet metals can specify varying levels of protection against EMI.

Author(s) Details:

Surendraloya,
Department of ECE, K L University, AP, India and Usha Rama College of Engineering and Technology, India.

Habibullakhan,
Department of ECE, K L University, AP, India.

Please see the link here: https://stm.bookpi.org/FRAPS-V5/article/view/10644

Study on Quantum Color Theory | Chapter 10 | New Trends in Physical Science Research Vol. 6

 The hue of the light that an item reflects determines its colour. Thus, colour is not a quality of the thing itself but rather of the light that illuminates it; things are only "colour thieves." The Snell-Descartes law of reflection, on the other hand, stipulates that the angle of incidence equals the angle of reflection for reflected light. According to this law, only viewers at particular locations are able to discern an object's hue. We all understand, however, that this is untrue, as any observer, from any viewpoint, can see the colour of the item. In this study, we then introduce a novel spectroscopic-based technique for characterising an object's colour: White light from the sun is absorbed by the object's atoms, which subsequently radiate at a frequency specific to the object's hue. We shall be able to describe several phenomena relating to object colour that the classical description cannot account for thanks to the quantum colour theory.

Author(s) Details:

Elie W'ishe Sorongane,
Physics Department, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.

Please see the link here: https://stm.bookpi.org/NTPSR-V6/article/view/7216

A Theoretical Model for RF Propagation within Rectangular Enclosures Using Waveguide Concepts | Chapter 5 | New Approaches in Engineering Research Vol. 16

 In order to completely appreciate the nature of the danger, properly identifying and managing hazards at work can be a lengthy effort that extends into the domain of uncertainty, probability, and prediction models. As a result, corporations cannot be held liable for knowledge gaps in the training of individuals they hire to guarantee a safe and healthy working environment, particularly where hidden hazards exist.

Authorities tasked with establishing RF (radiofrequency) and microwave exposure standards are particularly concerned with electromagnetic wave propagation at frequencies in the SAR (specific absorption rate) area. Despite the lack of solid proof that non-ionizing electromagnetic radiation causes adverse health consequences other than thermal impacts, every effort should be made to ensure that workers and the general public are sufficiently safeguarded against unwanted radiation exposure. Standards, on the other hand, define exposure limits for free space, plane wave propagation, but they fall short of accumulating data on wave intensities following reflection and diffraction off wall surfaces.

This review looks at a theoretical model for possible energy build-up owing to RF propagation in restricted areas with bigger dimensions and a waveguide design. Silos, tanks, pipes, air-conditioning ducts, tunnels, and operator cabins on board boats are examples of confined spaces. Rf waves reflect off the walls in these confined spaces and mix constructively or destructively with incident waves, resulting in reinforcement or cancellation, respectively. When there is reinforcement, the wave's intensity for a given distance may exceed the exposure limit for that distance from the source, exposing the worker to higher intensities than the recognised limit and posing a health and safety risk. Waveguide theory and physics concepts have been offered as the building blocks for the model construction in this approach.

Author(S) Details

Ricardo Rodriguez
Department of Mechanical and Manufacturing Engineering, The University of the West Indies, St. Augustine Campus, Trinidad and Tobago

Winston G. Lewis
Department of Mechanical and Manufacturing Engineering, The University of the West Indies, St. Augustine Campus, Trinidad and Tobago

View Book:- https://stm.bookpi.org/NAER-V16/article/view/4058