Mad scientist (also mad doctor or mad professor) is a caricature of a scientist who is described as "mad" or "insane" owing to a combination of unusual or unsettling personality traits and the unabashedly ambitious, taboo and/or hubristic nature of their experiments.
 As a motif in fiction, the mad scientist may be villainous (evil genius) or antagonistic, benign or neutral; may be insane, eccentric, or clumsy; and often works with fictional technology or fails to recognize or value common human objections to attempting to play God.
 Some may have benevolent or good-spirited intentions, even if their actions are dangerous or questionable, which can make them accidental villains.
This is a list of fictional technology and equipment appearing in the British comic strip Judge Dredd appearing in "2000 AD", "Judge Dredd Megazine" and related publications.
Jumbor Barutronica (重機人間ユンボル , Jūki Ningen Yunboru ) is a mecha manga series created by Hiroyuki Takei, the author of "Shaman King", and written by Mikami Hiromasa (加藤大悟 ) .
 It was serialized by Shueisha in the manga magazine "Weekly Shōnen Jump" between issues 3 and 14 of 2007, and collected in a single bound volume ("tankōbon").
 After the cancellation of the series, two short stories were published inside "Ultra Jump" in 2009 and 2010.
 These stories were written by Mikami Hiromasa and illustrated by Hiroyuki Takei.
 Following the success of the short stories, Hiroyuki Takei and Mikami Hiromasa decided to create a remake of the series, titled "Jumbor".
 The new manga is being serialized in "Ultra Jump" since August 2010.
Carolyn Janice Cherry (born September 1, 1942), better known by the pen name C. J. Cherryh, is an American writer of speculative fiction.
 She has written more than 60 books since the mid-1970s, including the Hugo Award-winning novels "Downbelow Station" (1981) and "Cyteen" (1988), both set in her Alliance-Union universe.
 She is known for "world building," depicting fictional realms with great realism supported by vast research in history, language, psychology, and archeology.
 Her series of fantasy novels set in the Alliance-Union universe, the Morgaine Stories, have sold in excess of 3 million copies.
Kazushi Hagiwara (萩原一至 , Hagiwara Kazushi , born April 4, 1963) is a Japanese manga artist best known for creating the manga "Bastard!!
".
 He originally began as an assistant to hentai manga artist Dirty Matsumoto, and then as an assistant to manga artist Izumi Matsumoto in the production of "Kimagure Orange Road", creating his own stories in his spare time.
 He debuted in "Weekly Shonen Jump" with two short stories, "Binetsu Rouge" (in 1987) and "Virgin Tyrant" (in 1988).
 He has also supervised, co-written and illustrated three "Bastard!!"
 related novels for the "Jump!
 J Books" imprint.
Masaya Tokuhiro (徳弘正也 , Tokuhiro Masaya ) is a Japanese manga artist working for various magazines within the Shueisha lines, including "Weekly Shōnen Jump" and "Super Jump".
 Born in Ōtoyo in the prefecture of Kōchi on March 1, 1959, he originally got notice from a placing entry in the 17th Akatsuka Award for his story "Bijō wa Niku-Ryori ga Tokui" (美女は肉料理がお得意 ) in 1982.
 His first series, "Shape Up Ran" (シェイプアップ乱 ) , soon followed, running between 1983 and 1985 in "Weekly Shōnen Jump" and quickly established him as not only a gag manga artist but one who balanced in dramatic elements into his stories as well.
 His most well known work, "Jungle King Tar-chan" (ジャングルの王者 ターちゃん♡ ) (a bizarre take on Edgar Rice Burroughs' famous jungle hero Tarzan), became a "Weekly Shōnen Jump" staple during its run between 1988 and 1995.
 At the same time as his "Weekly Shōnen Jump" success, he also had a successful series in "Super Jump" by way of "Fundoshi Police Ken-chan and Choco-chan" (ふんどし刑事ケンちゃんとチャコちゃん ) , running between 1986 and 1990.
 Other notable more recent series in the seinen magazine include "Kyōshirō 2030" (狂四郎2030 ) and "Showa Eternal Immortal Legend Vampire" (昭和不老不死伝説 バンパイア ) , which is his most recent and current series.
Jump is a fictional technology used by spacecraft in science fiction author C. J. Cherryh's Alliance-Union universe to travel faster-than-light (FTL).
 Jump can also be a verb, and is the act of travelling FTL using jump technology.
Unstable molecules are a fictional technology appearing in American comic books published by Marvel Comics.
 They exist as a configuration of unknown atomic nuclei and electrons that are responsive to certain energized matter around them.
 Developed by Reed Richards (Mister Fantastic of the Fantastic Four), unstable molecules are typically utilized in fabrics for superhero or supervillain costumes, allowing the fabric to conform with the wearer's form and to not succumb to the deleterious effects of wearer's powers.
 For example, as Mr. Fantastic stretches, his costume stretches with him instead of tearing.
 The same goes for his teammates: the Invisible Woman's costume becomes invisible when she does and the Human Torch's costume doesn't burn when he activates his powers.
 Essentially, it acts as an extension of the wearer's skin.
Fictional technology is an umbrella term for technological processes and devices that don't exist in reality, proposed or described in many different contexts.
In fictional works, a force field, sometimes known as an energy shield, force shield, defence shield or deflector shield, is a barrier made of energy or particles.
 It protects a person, area, or object from attacks or intrusions.
 This fictional technology is created as a field of energy without mass that acts as a wall, so that objects affected by the particular force relating to the field are unable to pass through the field and reach the other side.
 This concept has become a staple of many science-fiction works, so much so that authors frequently do not even bother to explain or justify them to their readers treating them almost as established fact.

Question: Jump is fictional technology in the stories of an author who is known for what? 
Answer: world building