Heavy metal is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom and the United States. With roots in blues rock, psychedelic rock, and acid rock, heavy metal bands developed a thick, massive sound, characterized by distortion, extended guitar solos, emphatic beats, and loudness. The lyrics and performances are sometimes associated with aggression and machismo.
Electrical resistivity and its inverse, electrical conductivity, is a fundamental property of a material that quantifies how strongly it resists or conducts electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is the ohm-meter (Ω⋅m). For example, if a 1 m × 1 m × 1 m solid cube of material has sheet contacts on two opposite faces, and the resistance between these contacts is 1 Ω, then the resistivity of the material is 1 Ω⋅m.
Magnetic circular dichroism (MCD) is the differential absorption of left and right circularly polarized light, induced in a sample by a strong magnetic field oriented parallel to the direction of light propagation. MCD measurements can detect transitions which are too weak to be seen in conventional optical absorption spectra, and it can be used to distinguish between overlapping transitions. Paramagnetic systems are common analytes, as their near-degenerate magnetic sublevels provide strong MCD intensity that varies with both field strength and sample temperature. The MCD signal also provides insight into the symmetry of the electronic levels of the studied systems, such as metal ion sites.
Glam metal, also known as hair metal or pop metal, is a subgenre of heavy metal, which features pop-influenced hooks and guitar riffs, and borrows heavily from the fashion and image of 1970s glam rock.
Power metal is a subgenre of heavy metal combining characteristics of traditional heavy metal with speed metal, often within symphonic context. Generally, power metal is characterized by a faster, lighter, and more uplifting sound, in contrast with the heaviness and dissonance prevalent for example in extreme metal. Power metal bands usually have anthem-like songs with fantasy-based subject matter and strong choruses, thus creating a theatrical, dramatic and emotionally "powerful" sound.
This Wikipedia page will go over every major DC Comics character that has become popular over the years.
Sludge metal is a genre of heavy metal music that originated through combining elements of doom metal and hardcore punk. It is typically harsh and abrasive, often featuring shouted vocals, heavily distorted instruments and sharply contrasting tempos. The Melvins from the US state of Washington produced the first sludge metal albums in the late 1980s, as well as being influential in the grunge scene. Sludge as a distinct genre emerged after 1990 also through the work of Louisiana bands such as Eyehategod and Crowbar. Later bands often border on stoner rock or post-metal.
A quantum well is a potential well with only discrete energy values.
A heterojunction is an interface that occurs between two layers or regions of dissimilar semiconductors. These semiconducting materials have unequal band gaps as opposed to a homojunction. It is often advantageous to engineer the electronic energy bands in many solid-state device applications, including semiconductor lasers, solar cells and transistors. The combination of multiple heterojunctions together in a device is called a heterostructure, although the two terms are commonly used interchangeably. The requirement that each material be a semiconductor with unequal band gaps is somewhat loose, especially on small length scales, where electronic properties depend on spatial properties. A more modern definition of heterojunction is the interface between any two solid-state materials, including crystalline and amorphous structures of metallic, insulating, fast ion conductor and semiconducting materials.
The Nissan S30 is the first generation of Z GT two-seat coupes, produced by Nissan Motors, Ltd. of Japan from 1969 to 1978. One of the most successful sports car lines ever produced, the trend-setting S30 was designed by a team led by Yoshihiko Matsuo, the head of Nissan's Sports Car Styling Studio.
In quantum physics, the spin–orbit interaction is a relativistic interaction of a particle's spin with its motion inside a potential. A key example of this phenomenon is the spin–orbit interaction leading to shifts in an electron's atomic energy levels, due to electromagnetic interaction between the electron's magnetic dipole, its orbital motion, and the electrostatic field of the positively charged nucleus. This phenomenon is detectable as a splitting of spectral lines, which can be thought of as a Zeeman effect product of two relativistic effects: the apparent magnetic field seen from the electron perspective and the magnetic moment of the electron associated with its intrinsic spin. A similar effect, due to the relationship between angular momentum and the strong nuclear force, occurs for protons and neutrons moving inside the nucleus, leading to a shift in their energy levels in the nucleus shell model. In the field of spintronics, spin–orbit effects for electrons in semiconductors and other materials are explored for technological applications. The spin–orbit interaction is one cause of magnetocrystalline anisotropy and the spin Hall effect.
Unblack metal is a religious philosophy within black metal whose artists are either directly against the Satanism prevalent in black metal, or promote Christianity in their lyrics and imagery. Unblack metal artists are controversial within the black metal subculture, because black metal's pioneers, especially those of the Second Wave, were anti-Christian. It is also suggested that Christianity contradicts black metal's dark nature and the individualistic and misanthropic ideals of many bands.
AFM Records GmbH is a music label based in Schwalmstadt, Germany. They focus on the heavy metal musical genre, signing bands such as U.D.O., Doro, Lordi, Kotipelto, Masterplan, Nostradameus, and Annihilator.
This is a list of lists of musicians.
Samarium monochalcogenides are chemical compounds with the composition SmX, where Sm stands for the lanthanide element samarium and X denotes any one of three chalcogen elements, sulfur, selenium or tellurium, resulting in the compounds SmS, SmSe or SmTe. In these compounds, samarium formally exhibits oxidation state +2, whereas it usually assumes the +3 state, resulting in chalcogenides with the chemical formula Sm2X3.