Golem (Dungeons & Dragons)

The golem is a fictional class of monster created for the Dungeons & Dragons fantasy role-playing game based upon the Golem of Jewish mythology. The golem first appeared in the original Greyhawk supplement (1975) written by Gary Gygax and Robert J. Kuntz and has since then became one of the most well-known creatures of the Dungeons & Dragons game.

Golems are magical constructs made of inert matter animated by high-level spellcasters through the use of powerful spells during magical rituals. The main aspect differentiating one type of golem from another is the material from which it is built. There are four standard types of golems, from weakest to strongest: flesh golems, clay golems, stone golems and iron golems. The flesh golem is created from human remains, and the others are created from earthen components: clay, stone and iron respectively. Virtually any material can be used to create a golem, and hundreds of different types of such creatures have been described for one edition or another of the game.

Minecraft

Minecraft is a sandbox video game originally created by Swedish programmer Markus "Notch" Persson and later developed and published by Mojang. The creative and building aspects of Minecraft enable players to build constructions out of textured cubes in a 3D procedurally generated world. Other activities in the game include exploration, resource gathering, crafting, and combat. Multiple gameplay modes are available, including survival mode where the player must acquire resources to build the world and maintain health, a creative mode where players have unlimited resources to build with and the ability to fly, an adventure mode where players play custom maps created by other players, and a spectator mode where players can fly around and clip through blocks, but cannot place or destroy any. The PC version of the game is renowned for its third-party mods, which add various new items, characters, worlds, and quests to the game.

The alpha version was publicly released for PC on May 17, 2009, and after gradual updates, the full version was released on November 18, 2011. A version for Android was released a month earlier on October 7, and an iOS version was released on November 17, 2011. The game was released on the Xbox 360 as an Xbox Live Arcade game on May 9, 2012; on the PlayStation 3 on December 17, 2013; on the PlayStation 4 on September 4, 2014; on the Xbox One the next day; on the PlayStation Vita on October 14, 2014; and on the Wii U on December 17, 2015. On December 10, 2014, a Windows Phone version was released. All versions of Minecraft receive periodic updates, with the console editions being co-developed by 4J Studios.

Mathematical fallacy

In mathematics, certain kinds of mistaken proof are often exhibited, and sometimes collected, as illustrations of a concept of mathematical fallacy. There is a distinction between a simple mistake and a mathematical fallacy in a proof: a mistake in a proof leads to an invalid proof just in the same way, but in the best-known examples of mathematical fallacies, there is some concealment in the presentation of the proof. For example, the reason validity fails may be a division by zero that is hidden by algebraic notation. There is a striking quality of the mathematical fallacy: as typically presented, it leads not only to an absurd result, but does so in a crafty or clever way. Therefore, these fallacies, for pedagogic reasons, usually take the form of spurious proofs of obvious contradictions. Although the proofs are flawed, the errors, usually by design, are comparatively subtle, or designed to show that certain steps are conditional, and should not be applied in the cases that are the exceptions to the rules.

Data

Data (/ˈdeɪtə/ DAY-tə, /ˈdætə/ DA-tə, or /ˈdɑːtə/ DAH-tə) is a set of values of qualitative or quantitative variables; restated, pieces of data are individual pieces of information. Data is measured, collected and reported, and analyzed, whereupon it can be visualized using graphs or images. Data as a general concept refers to the fact that some existing information or knowledge is represented or coded in some form suitable for better usage or processing.

Raw data, i.e. unprocessed data, is a collection of numbers, characters; data processing commonly occurs by stages, and the "processed data" from one stage may be considered the "raw data" of the next. Field data is raw data that is collected in an uncontrolled in situ environment. Experimental data is data that is generated within the context of a scientific investigation by observation and recording.

The Latin word "data" is the plural of "datum", and still may be used as a plural noun in this sense. Nowadays, though, "data" is most commonly used in the singular, as a mass noun (like "information", "sand" or "rain").

Iron

Iron is a chemical element with symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars, where the production of nickel-56 (which decays to the most common isotope of iron) is the last nuclear fusion reaction that is exothermic. Consequently, radioactive nickel is the last element to be produced before the violent collapse of a supernova scatters precursor radionuclide of iron into space.

Like other group 8 elements, iron exists in a wide range of oxidation states, −2 to +6, although +2 and +3 are the most common. Elemental iron occurs in meteoroids and other low oxygen environments, but is reactive to oxygen and water. Fresh iron surfaces appear lustrous silvery-gray, but oxidize in normal air to give hydrated iron oxides, commonly known as rust. Unlike many other metals which form passivating oxide layers, iron oxides occupy more volume than the metal and thus flake off, exposing fresh surfaces for corrosion.