Tex

Tex may refer to:

People

Tex is often used as a nickname for someone from the U.S. state of Texas.

TeX

TeX (/ˈtɛx/ or /ˈtɛk/, see below) is a typesetting system designed and mostly written by Donald Knuth and released in 1978.

Together with the Metafont language for font description and the Computer Modern family of typefaces, TeX was designed with two main goals in mind: to allow anybody to produce high-quality books using a reasonably minimal amount of effort, and to provide a system that would give exactly the same results on all computers, at any point in time.

TeX is a popular means by which to typeset complex mathematical formulae; it has been noted as one of the most sophisticated digital typographical systems in the world. TeX is popular in academia, especially in mathematics, computer science, economics, engineering, physics, statistics, and quantitative psychology. It has largely displaced Unix troff, the other favored formatter, in many Unix installations, which use both for different purposes. It is also used for many other typesetting tasks, especially in the form of LaTeX, ConTeXt, and other template packages.

Tex Willer

Tex Willer is the main fictional character of the Italian comics series Tex, created by writer Gian Luigi Bonelli and illustrator Aurelio Galleppini, and first published in Italy on 30 September 1948. It is among the most popular characters of Italian comics, with translations to numerous languages all around the world. The fan base in Brazil is especially large, but it is very popular also in Finland, Norway, Turkey, Croatia, France, Tamil Nadu, Serbia and Spain.

The Tex Willer series is an Italian-made interpretation of the American Old West, inspired by the classical characters and stories of old American Western movies.

Tex is depicted as a tough guy with a strong personal sense of justice, who becomes a ranger (even if living in Arizona) and defends Native Americans and any other honest character from exaction and greed of bandits, unscrupulous merchants and corrupt politician and tycoons.

Native Americans are portrayed in a complex way, emphasizing positive and negative aspects of their culture. The same can be said of the American authorities, like the U.S. Army, the politicians, the business-men, the sheriffs or the Bureau of Indian Affairs. Tex had a son, named Kit Willer (who would become a ranger too), with a Native American woman, named Lilyth, the daughter of a Navajo Chief (she would later die of smallpox). Later, Tex himself went on to become the Chief of the Navajo tribe.

Ends

Ends is a collection of science fiction stories and poems by Gordon R. Dickson. It was first published by Baen Books in 1988 and as a companion volume to Dickson's Beginnings. Most of the stories originally appeared in the magazines Analog Science Fiction and Fact, Astounding, If, Galaxy Science Fiction, Destinies, Science Fiction Stories and Amazing Stories The poems first appeared in The Final Encyclopedia.

Contents

References

Electronic cigarette

Electronic cigarettes are battery-powered vaporizers that simulate the feeling of smoking, but without tobacco. Their use is commonly called "vaping". Instead of cigarette smoke, the user inhales an aerosol, commonly called vapor, typically released by a heating element that atomizes a liquid solution known as e-liquid. The user activates the e-cigarette by taking a puff or pressing a button. Some look like traditional cigarettes, but they come in many variations. Most are reusable but there are also disposable versions called first-generation cigalikes; there are also second, third, and fourth-generation devices.

The benefits and the health risks of e-cigarettes are uncertain, and the long-term health effects are unknown. Compared to smoking tobacco, e-cigarettes are probably safer for both users and bystanders. There is tentative evidence that they can help people quit smoking, although they have not been proven to work better than regulated nicotine replacement products, and the regulated medication is safer. Their usefulness in tobacco harm reduction is unclear, but they could form part of future strategies to decrease tobacco related death and disease. Overall their safety risk to users is similar to that of smokeless tobacco. No serious adverse effects from e-cigarettes have been reported in trials, while less serious adverse effects include throat and mouth inflammation, vomiting, nausea, and cough. Non-smokers who use e-cigarettes risk becoming addicted to nicotine, a chemical with a range of harmful effects.

Generic top-level domain

Generic top-level domains (gTLDs) are one of the categories of top-level domains (TLDs) maintained by the Internet Assigned Numbers Authority (IANA) for use in the Domain Name System of the Internet. A top-level domain is the last label of every fully qualified domain name. They are called generic for historic reasons; initially, they were contrasted with country-specific TLDs in RFC 920.

The core group of generic top-level domains consists of the com, info, net, and org domains. In addition, the domains biz, name, and pro are also considered generic; however, these are designated as restricted, because registrations within them require proof of eligibility within the guidelines set for each.

Historically, the group of generic top-level domains included domains, created in the early development of the domain name system, that are now sponsored by designated agencies or organizations and are restricted to specific types of registrants. Thus, domains edu, gov, int, and mil are now considered sponsored top-level domains, much like the themed top-level domains (e.g., jobs). The entire group of domains that do not have a geographic or country designation (see country-code top-level domain) is still often referred to by the term generic TLDs.

Lattice (order)

In mathematics, a lattice is one of the fundamental algebraic structures used in abstract algebra. It consists of a partially ordered set in which every two elements have a unique supremum (also called a least upper bound or join) and a unique infimum (also called a greatest lower bound or meet). An example is given by the natural numbers, partially ordered by divisibility, for which the unique supremum is the least common multiple and the unique infimum is the greatest common divisor.

Lattices can also be characterized as algebraic structures satisfying certain axiomatic identities. Since the two definitions are equivalent, lattice theory draws on both order theory and universal algebra. Semilattices include lattices, which in turn include Heyting and Boolean algebras. These "lattice-like" structures all admit order-theoretic as well as algebraic descriptions.

Lattices as partially ordered sets

If (L, ≤) is a partially ordered set (poset), and S⊆L is an arbitrary subset, then an element u∈L is said to be an upper bound of S if s≤u for each s∈S. A set may have many upper bounds, or none at all. An upper bound u of S is said to be its least upper bound, or join, or supremum, if u≤x for each upper bound x of S. A set need not have a least upper bound, but it cannot have more than one. Dually, l∈L is said to be a lower bound of S if l≤s for each s∈S. A lower bound l of S is said to be its greatest lower bound, or meet, or infimum, if x≤l for each lower bound x of S. A set may have many lower bounds, or none at all, but can have at most one greatest lower bound.