Quantitative phase-contrast microscopyFORCETOC Quantitative phase contrast microscopy or quantitative phase imaging are the collective names for a group of microscopy methods that quantify the phase shift that occurs when light waves pass through a more optically dense object. Translucent objects, like a living human cell, absorb and scatter small amounts of light. This makes translucent objects much easier to observe in ordinary light microscopes. Such objects do, however, induce a phase shift that can be observed using a phase contrast microscope.
Thermal energyThe term "thermal energy" is used loosely in various contexts in physics and engineering. It can refer to several different well-defined physical concepts. These include the internal energy or enthalpy of a body of matter and radiation; heat, defined as a type of energy transfer (as is thermodynamic work); and the characteristic energy of a degree of freedom, , in a system that is described in terms of its microscopic particulate constituents (where denotes temperature and denotes the Boltzmann constant).
French Foreign LegionThe French Foreign Legion (Légion étrangère) is a corps of the French Army that consists of several specialties: infantry, cavalry, engineers, airborne troops. It was created in 1831 to allow foreign nationals into the French Army. It formed part of the Armée d’Afrique, the French Army's units associated with France's colonial project in Africa, until the end of the Algerian war in 1962. Legionnaires are highly trained soldiers and the Legion is unique in that it is open to foreign recruits willing to serve in the French Armed Forces.
French AlgeriaFrench Algeria (Alger to 1839, then Algérie afterwards; unofficially Algérie française, الجزائر المستعمرة), also known as Colonial Algeria, was the period of Algerian history when the region was a colony and later a part of France. French rule in the region began after the French successful invasion of Algeria and lasted until the end of the Algerian War leading to its independence in 1962. After being a French colony from 1830 to 1848, Algeria was a part of France from 4 November 1848 when the Constitution of French Second Republic took effect until its independence on 5 July 1962.
History of AlgeriaMuch of the history of Algeria has taken place on the fertile coastal plain of North Africa, which is often called the Maghreb (or Maghreb). North Africa served as a transit region for people moving towards Europe or the Middle East, thus, the region's inhabitants have been influenced by populations from other areas, including the Carthaginians, Romans, and Vandals. The region was conquered by the Muslims in the early 8th century AD, but broke off from the Umayyad Caliphate after the Berber Revolt of 740.
NitridingNitriding is a heat treating process that diffuses nitrogen into the surface of a metal to create a case-hardened surface. These processes are most commonly used on low-alloy steels. They are also used on titanium, aluminium and molybdenum. Typical applications include gears, crankshafts, camshafts, cam followers, valve parts, extruder screws, die-casting tools, forging dies, extrusion dies, firearm components, injectors and plastic-mold tools. The processes are named after the medium used to donate.
KabyliaKabylia (Kabyle: Tamurt n Leqbayel or Iqbayliyen, meaning "Land of Kabyles", منطقة القبائل, meaning "Land of the Tribes") is a mountainous coastal region in northern Algeria and the homeland of the Kabyle people. It is part of the Tell Atlas mountain range and is located at the edge of the Mediterranean Sea. Kabylia covers two provinces of Algeria: Tizi Ouzou and Bejaia. Gouraya National Park and Djurdjura National Park are also located in Kabylia.
Plasma electrolytic oxidationPlasma electrolytic oxidation (PEO), also known as electrolytic plasma oxidation (EPO) or microarc oxidation (MAO), is an electrochemical surface treatment process for generating oxide coatings on metals. It is similar to anodizing, but it employs higher potentials, so that discharges occur and the resulting plasma modifies the structure of the oxide layer. This process can be used to grow thick (tens or hundreds of micrometers), largely crystalline, oxide coatings on metals such as aluminium, magnesium and titanium.
