Provider 3.1.0+1

Provider 3.1.0+1

A mixture between dependency injection (DI) and state management, built with widgets for widgets. It purposefully uses widgets for DI/state management instead of dart-only classes like Stream. The reason is, widgets are very simple yet robust and scalable. By using widgets for state management, provider can guarantee: maintainability, through a forced u ...

Top 10 Most Well Trained Special Forces on Earth

Top 10 Most Well Trained Special Forces on Earth

Fact - Nearly ALL the worlds Special Forces base their military model on the British SAS. In fact, the USA's Delta Force was set up after the founder spent time attached to the SAS. The Delta Forces even uses an SAS organisational structure using troops and squadrons. It's often remarked that the sand beret is also worn by US Rangers but this was a recen ...

Modern Theory of Nuclear Forces

Modern Theory of Nuclear Forces

Within the Standard Model of particle physics, the strong interactions are described by Quantum Chromodynmics (QCD). QCD is a fascinating theory with many intriguing manifestations. Its structure and interactions are governed by a local non-abelian gauge symmetry, namely SU(3)color. Its fundamental degrees of freedom, the quarks (the matter fields) and g ...

Theory of Quantum Friction

Theory of Quantum Friction

Here, we develop a comprehensive quantum theory for the phenomenon of quantum friction. Based on a theory of macroscopic quantum electrodynamics for unstable systems, we calculate the quantum expectation of the friction force at zero temperature, and link the friction effect to the emergence of system instabilities related to the Cherenkov effect. These ...

Electromagnetic Force Distribution Inside Matter

Electromagnetic Force Distribution Inside Matter

Using the Finite Difference Time Domain method, we solve Maxwell's equations numerically and compute the distribution of electromagnetic fields and forces inside material media. The media are generally specified by their dielectric permittivity ε (ω) and magnetic permeability µ(ω), representing small, transparent dielectric and magnetic objects such as p ...

Quantum Theory of the Atomic Nucleus

Quantum Theory of the Atomic Nucleus

It has often been suggested that non–Coulomb attractive forces play a very important role inside atomic nuclei. We can make many hypotheses concerning the nature of these forces. They can be the attractions between the magnetic moments of the individual constituents of the nucleus or the forces engendered by electric and magnetic polarization. In any cas ...

The Casimir-Effect: No Manifestation of Zero-Point Energy

The Casimir-Effect: No Manifestation of Zero-Point Energy

The attractive force between metallic surfaces, predicted by Casimir in 1948, seems to indicate the physical existence and measurability of the quantized electromagnetic field’s zero-point energy. It is shown in this article, that the measurements of that force do not confirm Casimir’s model, but in fact disprove it’s foundational assumption that metal p ...

The Properties of Electromagnetic Radiation

The Properties of Electromagnetic Radiation

Field is a physics term for a region that is under the influence of some force that can act on matter within that region. For example, the Sun produces a gravitational field that attracts the planets in the solar system and thus influences their orbits. Stationary electric charges produce electric fields, whereas moving electric charges produce both elec ...

Fundamental Forces

Fundamental Forces

[The “strength” entries in this table reflect the relative magnitudes of the various forces as they act on a pair of protons in an atomic nucleus. Note that MIT professor Frank Wilczek shared the 2004 physics Nobel Prize with David Gross (now director of the Kavli Institute for Theoretical Physics at UC Santa Barbara) and H. David Politzer (now professor ...

Science and Reactor Fundamentals -- Fluid Mechanics

Basic Definitions • Define the following terms and state their units of measurement: pressure, density, and viscosity. 1.2 Pressure • Convert a given value of pressure expressed on the absolute, gauge or vacuum scale to the appropriate values on either of the other two scales. • Given a pressure differential acting on a given area, calculate the force pr ...

The Birth of Modern Physics

The Birth of Modern Physics

By the end of the nineteenth century, already a large amount was known concerning the behaviour of objects subjected to forces of different kinds. But it had been a long and arduous road on the acquisition of this knowledge, with contributions from several great scientists. For example, the laws of mechanics began to really take shape with the work of Ga ...

Electromagnetism Overview

Electromagnetism Overview

Students explore one of the fundamental physical forces in nature: electromagnetism. Students first investigate the properties of magnetism: magnetic interaction, magnetic fields, polarity, attraction and repulsion of like and unlike poles, and the cumulative strength of multiple magnets. Compass needle deflections indicate to students that, like a magne ...

Biophysics Graduate Student Handbook

Biophysics Graduate Student Handbook

Biophysics is a highly integrated discipline that encompasses nearly all aspects of biomedical science, from the interaction of various forms of energy with biologically relevant molecules to the mechanical forces involved with limb movement in an intact organism. What makes distinguishes biophysics from other disciplines of biomedical science is its app ...

YEMEN Country Brief

YEMEN Country Brief

In 2015, Yemen spiralled into civil and regional war between Houthi forces and President Abd Rabbu Mansur Hadi’s government. This led to the overthrow of the government and a Saudi-led counter-offensive. The ongoing fighting, combined with a Saudi-imposed blockade that enforced an arms embargo, have created a humanitarian emergency, pushing Yemen to the ...

Togo: After Eyadéma?

Togo: After Eyadéma?

Togo’s transition to multiparty representative politics rapidly went off course in the early 1990s, due to a combination of state terror under veteran dictator General Gnassingbé Eyadéma and incoherence on the part of a largely southern-based opposition. Eyadéma’s armed forces launched a policy of savage repression of southerners, resulting in mass popul ...

Switzerland at a Glance

Switzerland at a Glance

Switzerland, a country that espouses neutrality, is a prosperous and modern market economy with low unemployment, a highly skilled labor force, and a per capita GDP among the highest in the world. Switzerland's economy benefits from a highly developed service sector, led by financial services, and a manufacturing industry that specializes in high-technol ...

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