Your browser does not fully support modern features. Please upgrade for a smoother experience.
Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort by:
Most Viewed Latest Alphabetical (A-Z) Alphabetical (Z-A)
Filter:
All Topic Review Biography Peer Reviewed Entry Video Entry
Topic Review
List of Unnumbered Minor Planets: 2004 T–Y
This is a partial list of unnumbered minor planets for principal designations assigned between 1 October 2004 and 31 December 2004 (T–Y).
  • 533
  • 26 Oct 2022
Topic Review
List of Unnumbered Minor Planets: 2002 R–S
This is a partial list of unnumbered minor planets for principal designations assigned between 1 September 2002 and 31 September 2002 (R–S).
  • 525
  • 14 Nov 2022
Topic Review
List of Unnumbered Minor Planets: 2003 A–R
This is a partial list of unnumbered minor planets for principal designations assigned between 1 January 2003 and 15 September 2003 (A–R).
  • 525
  • 28 Nov 2022
Topic Review
List of Unnumbered Minor Planets: 2001 A–R
This is a partial list of unnumbered minor planets for principal designations assigned between 1 January 2001 and 15 September 2001 (A–R).
  • 510
  • 24 Oct 2022
Topic Review
Fine-Structure Classification of Solar Metric Radio Bursts
Radio bursts provide important diagnostics of energetic phenomena of the Sun. In particular, bursts in decimetric and metric wavelengths probe the physical conditions and the energy release processes in the low corona as well as their association with heliospheric phenomena. The advent of spectral radio data with high time and high frequency resolution has provided a wealth of information on phenomena of short duration and narrow bandwidth. Of particular value are spectral data combined with imaging observations at specific frequencies.
  • 509
  • 15 Jan 2024
Topic Review
List of Unnumbered Minor Planets: 2004 R–S
This is a partial list of unnumbered minor planets for principal designations assigned between 1 September 2004 and 31 September 2004 (R–S).
  • 443
  • 10 Oct 2022
Topic Review
Transient Phenomena in Exotic Astrophysical Objects
Selected topics from particular exotic Astrophysical sources are surveyed. In particular, the studies of the X-ray emissions are recapitulated.
  • 399
  • 07 Mar 2025
Topic Review
Molecular Clouds and Dark Nebulae
A molecular cloud is an accumulation of interstellar gas and dust. These clouds have very low temperatures of just 10 to 30 kelvin and therefore the hydrogen is primarily composed of molecular hydrogen or H2. Compared to the mainly ionized hydrogen in other areas of the interstellar medium, less than 1% of all hydrogen in the Milky Way is bound in molecular clouds. The rest is in the form of atomic hydrogen which can become a molecular cloud at a later point in time. 
  • 349
  • 24 Apr 2025
Topic Review
Degeneracy
Degenerate matter is created under the enormous pressures of very dense neutron stars. The properties of degenerate matter are determined by quantum mechanics and are therefore completely different from the properties of the matter that surrounds us. 
  • 270
  • 24 Apr 2025
Topic Review
Emission Nebula
An emission nebula is a cloud of interstellar gas and dust that emits light in different colours. There are several different types of emission nebulae with diverse sources of energy that are responsible for the glowing of gas and dust. Their colour varies depending on the degree of ionisation and the chemical elements of the nebula. 
  • 263
  • 24 Apr 2025
Topic Review
K-Systems & Securities – Inner Achievement Statement
The scientific validation phase is complete. The current strategic posture, defined by the dual "Inner Achievement Statement" and "Outer (Public-Facing) Statement," provides maximum leverage. We have moved from a position of discovery to one of declaration. The objective is no longer to prove the K-System Framework, but to dictate the terms of its integration into the scientific and strategic landscape. This protocol outlines the decision-making framework for initiating the public cascade via the controlled release of the Outer Statement.
  • 80
  • 08 Sep 2025
Topic Review Peer Reviewed
From Airy’s Equation to the Non-Dissipative Lorenz Model: Turning Points, Quantum Tunneling, and Solitary Waves
This report bridges fundamental ideas from introductory calculus to advanced concepts in quantum mechanics and nonlinear dynamics. Beginning with the behavior of second derivatives in oscillatory and exponential functions, it introduces the Airy equation and the WKB approximation as mathematical tools for describing wave propagation and quantum tunneling near turning points—locations where transitions between oscillatory and exponential components occur. The analysis then extends to the non-dissipative Lorenz model, whose double-well potential and solitary-wave (sech-type) solutions reveal a deep mathematical connection with the nonlinear Schrödinger equation. Together, these examples highlight the universality of second-order differential equations in describing turning-point dynamics, encompassing physical phenomena ranging from quantum tunneling to coherent solitary-wave structures in fluid and atmospheric systems.
  • 20
  • 16 Dec 2025
  • Page
  • of
  • 13
Featured Entry Collections
>>

Featured Books

>>
Encyclopedia of Digital Society, Industry 5.0 and Smart City
Encyclopedia of Engineering
Encyclopedia of Social Sciences
Encyclopedia of COVID-19
Academic Video Service
Feedback